TWI838775B - Oil pan and reciprocating pump - Google Patents

Abstract

The present invention provides an oil pan and a reciprocating pump. The oil pan includes a housing space defined by a bottom wall and side walls erecting on the periphery of the bottom wall, and a partition wall that erects on the bottom wall and divides a bottom surface formed by the bottom wall into a first bottom surface region corresponding to a first housing space and a second bottom surface region corresponding to a second housing space such that the housing space is divided into at least the first housing space and the second housing space.

Description

Oil pan and reciprocating pump

The present disclosure relates to an oil pan and a reciprocating pump.

A reciprocating pump is disclosed in Japanese Patent Publication No. 4-24551. The pump includes a crankcase as a driving part and a manifold connected to the crankcase. The crankcase includes a guide part for guiding the reciprocating member, and the manifold includes a pump chamber for the top side of the reciprocating part to penetrate. A space is formed between the guide part and the pump chamber, and the pump chamber and the guide part are sealed liquid-tightly by sealing members. A hole connected to the oil pan is formed in the peripheral wall constituting the space.

In the above-mentioned reciprocating pump, the fluid leaked from the sealing member on the pump chamber side and the oil leaked from the sealing member on the guide side are accumulated in the oil pan through the hole formed in the part between the guide and the pump chamber. That is, a mixture of liquid such as water and oil is accumulated inside the oil pan. In this case, it is considered difficult to confirm the oil leakage. In addition, there are cases where it is difficult to confirm the amount of leaked oil.

The purpose of this disclosure is to provide an oil pan and a reciprocating pump that can properly control oil leakage.

A technical solution is an oil pan installed on a reciprocating pump (1), wherein the reciprocating pump (1) comprises: a driving part (10) including a first cylinder (11); a pump part (30) including a second cylinder (31) axially opposite to the first cylinder (11); a reciprocating member (50) guided by the first cylinder (11) and the second cylinder (31) to perform reciprocating motion; an annular first sealing member (70) in the first cylinder (11) and in contact with the reciprocating member The invention relates to a first sealing member (70) and a second sealing member (49) which is in sliding contact with the reciprocating member (50); a second sealing member (49) which is in sliding contact with the reciprocating member (50) in the second cylinder (31); and a sealing member pressing member (60) which has a cylindrical shape and surrounds a portion of the reciprocating member (50) in the circumferential direction and is arranged between the first sealing member (70) and the second sealing member (49), and a first through hole (67) and a second through hole (68) are formed on the peripheral wall (61) of the sealing member pressing member (60). The oil pan comprises: a receiving space (S) formed by a bottom wall (101) and a side wall (103) vertically arranged on the periphery of the bottom wall (101); and a partition wall (107) vertically arranged on the bottom wall (101) so as to divide the receiving space (S) into at least a first receiving space (S1) and a second receiving space (S2). The bottom surface (102) formed by the wall (101) is divided into a first bottom surface area (102a) corresponding to the first receiving space (S1) and a second bottom surface area (102b) corresponding to the second receiving space (S2). When the oil pan is mounted on the reciprocating pump (1), the first bottom surface area (102a) is located on the lower side of the first through hole (67) in the vertical direction, and the second bottom surface area (102b) is located on the lower side of the second through hole (69) in the vertical direction.

The oil pan is mounted on the lower side of the seal pressing member (60) of the reciprocating pump (1) to receive the liquid leaking from the seal pressing member (60). A first through hole (67) close to the first seal (70) and a second through hole (69) close to the second seal (49) are provided on the peripheral wall (61) of the seal pressing member (60). Thus, when the liquid in the first cylinder (11) leaks from the first seal (70), it is easy to discharge the liquid from the first through hole (67), and when the liquid in the second cylinder (31) leaks from the second seal (49), it is easy to discharge the liquid from the second through hole (69). The drain from the first through hole (67) is received in the first bottom surface area (102a), and the drain from the second through hole (69) is received in the second bottom surface area (102b). In this way, the liquid leaked from the first cylinder (11) and the liquid leaked from the second cylinder (31) are received separately, so that the leakage of the liquid (in one example, oil) from the first cylinder (11) can be properly controlled.

Alternatively, a hole (111) penetrating the bottom wall (101) may be formed in the second bottom surface area (102b), and a cylindrical portion (109) surrounding the hole (111) and protruding from the lower surface may be formed on the lower surface of the bottom wall (101). With this structure, liquid accumulated in the second bottom surface area (102b) can be discharged from the hole (111) to the outside. In this case, by connecting a hose or the like to the cylindrical portion (109), the liquid can be discharged to any location.

Alternatively, the oil pan may be made of a resin that is transparent to visible light. With this structure, the storage space (S) of the oil pan can be visually checked from the outside.

Alternatively, when the oil pan is connected to the reciprocating pump (1) axially mounted along the horizontal plane, at least the first bottom surface area (102a) of the bottom surface (102) is inclined relative to the horizontal plane. With this structure, the liquid accumulated in the first storage space (S1) including the first bottom surface area (102a) moves in one direction due to the inclination.

The angle formed by the partition wall (107) and the portion of the bottom wall (101) constituting the first bottom surface area (102a) is greater than 90 degrees. With this structure, when the partition wall (107) is arranged along the vertical direction, the first bottom surface area (102a) in the bottom surface (102) is inclined relative to the horizontal plane.

Alternatively, the height of the partition wall (107) may be lower than the height of the side wall (103). With this structure, when any one of the first storage space (S1) and the second storage space (S2) is filled with liquid, the liquid passes over the partition wall (107) and moves to any other space.

Alternatively, a hole (113) penetrating the bottom wall (101) may be formed in the first bottom surface area (102a), and a cylindrical portion (115) surrounding the hole (113) and protruding from the lower surface may be formed on the lower surface of the bottom wall (101). With this structure, liquid accumulated in the first bottom surface area (102a) can be discharged from the hole (113) to the outside. In this case, by connecting a hose or the like to the cylindrical portion (115), the liquid can be discharged to any location.

Alternatively, the hole portion (113) may be arranged at a position higher than the center of the tilting direction in the first bottom surface area (102a) tilted relative to the horizontal plane. With this structure, the hole portion (113) is arranged at the tilting upper side in the first bottom surface area (102a), so that the liquid discharged from the first through hole (67) can be stored at a position lower than the hole portion (113).

Alternatively, when the oil pan is connected to the reciprocating pump (1) axially mounted along the horizontal plane, the second bottom surface area (102b) in the bottom surface (102) is inclined relative to the horizontal plane, and the hole (111) is arranged at a position lower than the center of the inclination direction in the second bottom surface area (102b) inclined relative to the horizontal plane. With this structure, the hole (111) is arranged on the inclined lower side of the second bottom surface area (102b), so that the liquid discharged from the second through hole (69) can be quickly discharged from the hole (111).

A reciprocating pump of a technical solution comprises: a driving part (10) including a first cylinder (11); a pump part (30) including a second cylinder (31) axially opposite to the first cylinder (11); a reciprocating member (50) guided by the first cylinder (11) and the second cylinder (31) to reciprocate; an annular first sealing member (70) in sliding contact with the reciprocating member (50) in the first cylinder (11); and an annular second sealing member (70). (49), which is in sliding contact with the reciprocating member (50) in the second cylinder (31); a sealing member pressing member (60), which has a cylindrical shape, surrounds a portion of the reciprocating member (50) in the circumferential direction, and is arranged between the first sealing member (70) and the second sealing member (49); and an oil pan (100), which is arranged below the sealing member pressing member (60), and has a first through hole (61) formed on the peripheral wall (61) of the sealing member pressing member (60). 7); and a second through hole (69) formed at a position closer to the second seal (49) in the axial direction than the first through hole (67), the oil pan (100) comprises: a receiving space (S) formed by dividing the bottom wall (101) and a side wall (103) vertically arranged on the periphery of the bottom wall (101); and a partition wall (107) vertically arranged on the bottom wall (101) to divide the receiving space (S) into at least a first receiving space (S1) and a second receiving space (S2). The second receiving space (S2) is formed by dividing the bottom surface (102) formed by the bottom wall (101) into a first bottom surface area (102a) corresponding to the first receiving space (S1) and a second bottom surface area (102b) corresponding to the second receiving space (S2), the first bottom surface area (102a) being located at the lower side of the first through hole (67) in the vertical direction, and the second bottom surface area (102b) being located at the lower side of the second through hole (69) in the vertical direction.

Thus, according to a technical solution disclosed in the present invention, an oil pan and a reciprocating pump that can properly control oil leakage can be provided.

1: Reciprocating pump

10: Drive unit

11: Cylinder 1

13: Crankcase

13a: Oil filling port

13b: Drain plug

13c: Leg part

15: Crankshaft

17: Connecting rod

18: Piston pin

19: Driving mechanism

30: Pump Department

31: Cylinder 2

32: Spray outlet

33: 1st manifold

35: Second manifold

36: Flow path

37: Pump room

37a: Opening

38: Suction valve

39: Inlet

41: Flow path

42: Water supply port

43: Blowout valve

45: Connecting pipe

46: Drainage outlet

47: High pressure seals

48: Gasket

48a,65: Stage Department

49: Low pressure seal (second seal)

50: Reciprocating motion components

51: Plunger rod

51a: End (1st end)

53: plunger sleeve

53a: End (second end)

55: Bolts

57: Flat washer

60: Sealing parts and compression parts

61: surrounding wall

62:Maintenance Department

62a: concave part

63: End wall

66: O-ring

67: 1st through hole

67a, 69a: The first long hole-shaped part

67a1: Periphery

67b, 69b: The second long hole-shaped part

68: Partition wall

69: Second through hole

70: Oil seal (first seal)

100,200:Oil pan

101: Bottom wall

102: Bottom

102a: 1st bottom surface area

102b: Second bottom area

103: Side wall

103a: 1st side wall

103b: 2nd side wall

103c: 3rd side wall

103d: 4th side wall

105: Support sheet

105a: Bolt hole

105b: Bolt

107: Partition wall

109,115: cylindrical part

111,113: Hole

L1: Distance

L2: Height

L3: Distance

S: Containment space

S1: Containment Room 1

S2: Second containment space

Figure 1 is a cross-sectional view of an example reciprocating pump.

FIG2 is a three-dimensional cross-sectional view showing an example of a sealing member compression member.

FIG3 is a longitudinal sectional view showing an example of a sealing member compression member.

Figure 4 is a partial enlarged view of Figure 1.

FIG5 is a perspective view showing an example of an oil pan.

FIG6 is a cross-sectional view of an example reciprocating pump (oil pan).

FIG7 is a cross-sectional view showing another example of an oil pan.

Hereinafter, a reciprocating pump of an example will be described with reference to the attached drawings. In this specification, as an example of a reciprocating pump, a so-called horizontal triple plunger pump in which the plungers constituting the reciprocating member are arranged in three rows in parallel in the horizontal direction will be described. In the following description, "upper" and "lower" are defined based on the state in which the reciprocating pump is placed on a horizontal plane, and "front" and "rear" are defined based on the axial direction of the reciprocating member, with the pump side defined as the front and the drive side defined as the rear.

FIG. 1 is a cross-sectional view showing one of the three plunger pumps constituting the reciprocating pump. In an example of the reciprocating pump 1, three pump structures shown in FIG. 1 are arranged side by side along the X direction. As shown in FIG. 1, the reciprocating pump 1 includes a drive unit 10, a pump unit 30, a reciprocating member 50, a seal pressing member 60, and an oil pan 100. The drive unit 10 includes a first cylinder 11. The first cylinder 11 of an example is formed in a crankcase 13. The crankcase 13 is hollow. The following components are arranged in the crankcase 13: a crankshaft 15; a connecting rod 17 rotatably connected to the crankshaft 15; and a piston pin 18 rotatably connecting the plunger rod 51 to the connecting rod 17, thereby constituting a driving mechanism 19 for reciprocatingly driving the reciprocating member 50.

The first cylinder 11 is cylindrical and has an axial direction orthogonal to the axial direction of the crankshaft 15. In the illustrated example, the axial direction of the crankshaft 15 is along the X direction, and the axial direction of the first cylinder 11 is along the Y direction. The top end of the connecting rod 17 and the piston pin 18 can be arranged on the inner side of the first cylinder 11.

The crankcase 13 is filled with oil (first liquid) for lubrication and cooling of the drive mechanism 19. Therefore, in one example, the crankcase 13 is provided with an oil filling port 13a for injecting oil into the inner space and a drain plug 13b for discharging oil. In addition, a support leg 13c for mounting the reciprocating pump 1 is formed on the outer surface of the crankcase 13. For example, when the reciprocating pump 1 is mounted in a manner that the support leg 13c abuts against the horizontal ground, the axial direction of the first cylinder 11 is approximately parallel to the horizontal plane.

The pump unit 30 is connected to the front end of the crankcase 13 constituting the drive unit 10. The pump unit 30 includes a cylindrical second cylinder 31. An example of the pump unit 30 has a first manifold 33 as an ejection manifold and a second manifold 35 as a water intake manifold. For example, a pump chamber 37 is provided in the first manifold 33. In addition, the second manifold 35 is connected to the first manifold 33 and the crankcase 13. The second manifold 35 has a second cylinder 31 connected to the pump chamber 37. The second cylinder 31 is cylindrical and has an axis that coincides with the axis of the first cylinder 11.

The second manifold 35 abutting the crankcase 13 is provided with a suction port 39 for introducing a working liquid such as water into the pump chamber 37, and the first manifold 33 abutting the second manifold 35 is provided with a discharge port 32 for discharging the working liquid compressed in the pump chamber 37. A suction valve 38 is provided in the flow path 36 connecting the suction port 39 and the pump chamber 37, and a discharge valve 43 is provided in the flow path 41 connecting the pump chamber 37 and the discharge port 32.

The first manifold 33 and the second manifold 35 are connected by means of a connecting pipe 45. The connecting pipe 45 is a substantially cylindrical component. The connecting pipe 45 is arranged across the opening 37a of the pump chamber 37 formed in the first manifold 33 and connected to the second cylinder 31 and the second cylinder 31 formed in the second manifold 35. The connecting portion between the pump chamber 37 and the second cylinder 31 is sealed liquid-tight by the connecting pipe 45. A high-pressure seal 47 is provided on the inner side of the second cylinder 31 at the rear side of the connecting pipe 45. The high-pressure seal 47 is in sliding contact with the plunger sleeve 53 discussed later to seal the inside of the second cylinder 31 liquid-tightly.

In the second cylinder 31 of the second manifold 35, a low-pressure seal 49 (second seal) having a sealing pressure lower than that of the high-pressure seal 47 is arranged at a position away from the high-pressure seal 47 toward the crankcase 13. The low-pressure seal 49 is in sliding contact with the plunger sleeve 53 to seal the inside of the second cylinder 31 liquid-tightly. In addition, in the second manifold 35, a water supply port 42 and a drain port 46 communicating with the inside of the second cylinder 31 are provided between the high-pressure seal 47 and the low-pressure seal 49. Cooling water can be supplied to the water supply port 42. The cooling water supplied to the water supply port 42 circulates in the space sealed by the high-pressure seal 47 and the low-pressure seal in the second cylinder 31. The cooling water cools the high-pressure seal 47, the plunger sleeve 53 and the low-pressure seal 49, and drains water from the drain port 46.

The reciprocating member 50 includes a plunger rod 51 and a plunger sleeve 53. The plunger rod 51 includes a cylindrical portion arranged in the first cylinder 11. The plunger rod 51 is rotatably connected to the connecting rod 17 by means of a piston pin 18. The plunger sleeve 53 includes a cylindrical portion arranged in the second cylinder 31. The plunger sleeve 53 is connected to the front end of the plunger rod 51 by means of, for example, a bolt 55. In one example, the diameter of the plunger sleeve 53 is larger than the diameter of the plunger rod 51. In the illustrated example, at the connection position between the plunger sleeve 53 and the plunger rod 51, a flat washer 57 arranged at the end of the plunger sleeve 53 is clamped by the plunger sleeve 53 and the plunger rod 51. The diameter of the flat washer 57 is larger than the diameter of the plunger sleeve 53.

The reciprocating member 50 reciprocates axially in the first cylinder 11 and the second cylinder 31 by means of the connecting rod 17 and the piston pin 18 due to the rotation of the crankshaft 15. Since the reciprocating member 50 reciprocates in the first cylinder 11 and the second cylinder 31, the pump action is performed by using the pump chamber 37 formed on the top side of the second cylinder 31. At this time, the rear end 51a (first end) of the plunger rod 51 is arranged on the inner side of the first cylinder 11, and the front end 53a (second end) of the plunger sleeve 53 can be arranged on the inner side of the second cylinder 31. The connecting portion between the plunger rod 51 and the plunger sleeve 53 is arranged on the inner side of the seal pressing member 60, which is arranged between the first cylinder 11 and the second cylinder 31.

The seal pressing member 60 is arranged between the first cylinder 11 and the second cylinder 31. The seal pressing member 60 has a cylindrical shape and surrounds a portion of the reciprocating member 50 in the circumferential direction. In the illustrated example, the seal pressing member 60 has a substantially cylindrical shape. For example, the connection portion between the plunger rod 51 and the plunger sleeve 53 is surrounded by the seal pressing member 60.

The seal pressing member 60 can push the low-pressure seal 49 forward. In the illustrated example, a cylindrical gasket 48 is arranged between the seal pressing member 60 and the low-pressure seal 49. The seal pressing member 60 pushes the low-pressure seal 49 via the gasket 48. The inner diameter of the gasket 48 is, for example, slightly larger than the outer diameter of the plunger sleeve 53. In addition, a step portion 48a having a smaller outer diameter is provided at the rear end of the gasket 48.

In addition, the seal pressing member 60 holds the oil seal 70 (first seal) and can push the oil seal 70 backward. The oil seal 70 is a component that is in liquid-tight sliding contact with the outer peripheral surface of the plunger rod 51. The oil seal 70 suppresses the leakage of oil in the crankcase 13. For example, the oil seal 70 is a component in which a metal ring is covered with a rubber component and is in the shape of a ring.

FIG. 2 is a three-dimensional cross-sectional view of the seal pressing member 60, and FIG. 3 is a longitudinal cross-sectional view of the seal pressing member 60. The seal pressing member 60 includes a peripheral wall 61 that is substantially cylindrical and an annular end wall 63 that protrudes radially inward from the peripheral wall 61. In addition, a step portion 65 having an inner diameter larger than that of other parts is formed at the front end of the seal pressing member 60. In one example, the step portion 48a of the gasket 48 is engaged with the step portion 65 of the seal pressing member 60.

The first through hole 67 and the second through hole 69 are formed on the peripheral wall 61 of the seal pressing member 60. The first through hole 67 connects the inner side and the outer side of the peripheral wall 61. An example of the first through hole 67 has a roughly T-shaped shape formed by combining the first long hole shaped portion 67a and the second long hole shaped portion 67b. The first long hole shaped portion 67a is in a racetrack shape with the X direction intersecting the axial direction as the length direction. The second long hole shaped portion 67b is in a racetrack shape with the axial direction as the length direction. The first long hole shaped portion 67a is continuous with the rear side of the second long hole shaped portion 67b in a manner that the center positions in the X direction coincide with each other, so that the first through hole 67 is roughly T-shaped.

The second through hole 69 is formed at a position closer to the low-pressure seal 49 than the first through hole 67 in the axial direction, that is, at the front side. An example of the second through hole 69 has a roughly T-shaped shape formed by combining the first long hole-shaped portion 69a and the second long hole-shaped portion 69b. The first long hole-shaped portion 69a is in a racetrack shape with the direction intersecting the axial direction as the length direction. The second long hole-shaped portion 69b is in a racetrack shape with the axial direction as the length direction. The first long hole-shaped portion 69a is continuous with the front side of the second long hole-shaped portion 69b in a manner that the center positions in the X direction coincide with each other, so that the second through hole 69 is roughly T-shaped.

For example, it is preferred that the size of the first long hole-shaped portion 67a, 69a in the length direction (X direction) is approximately the same as the diameter of the plunger rod 51. Here, approximately the same as the diameter of the plunger rod 51 is taken as an example to mean that the error between the diameter and the diameter of the plunger rod 51 is ±20%.

The first through hole 67 and the second through hole 69 are preferably located on the lower surface side of the peripheral wall 61 of the seal pressing member 60 when the reciprocating pump 1 is placed on a horizontal plane. In one example, the center position of the first through hole 67 and the second through hole 69 in the X direction coincides with the center line of the plunger rod 51 when viewed from the Z direction. That is, the first through hole 67 and the second through hole 69 are located directly below the plunger rod 51.

The end wall 63 protrudes radially inward from the peripheral wall 61 at the axial rear end of the peripheral wall 61. The end wall 63 of one example is in the shape of a circular ring plate. The inner diameter of the end wall 63 is larger than at least the outer diameter of the plunger rod 51. In the illustrated example, a retaining portion 62 extending axially from the peripheral wall 61 is formed at a position further back than the end wall 63. The retaining portion 62 has a substantially cylindrical shape. The inner diameter of the retaining portion 62 is smaller than the inner diameter of the peripheral wall 61, and larger than the inner diameter of the end wall 63. The retaining portion 62 is a portion for retaining the oil seal 70. Therefore, it is preferred that the inner diameter of the retaining portion 62 is the same as the outer diameter of the oil seal 70, and it is preferred that the axial length of the retaining portion 62 is the same as the thickness of the oil seal 70. In addition, for an example of a reciprocating pump 1, the rear end portion of the seal pressing member 60 is engaged with the opening portion of the first cylinder 11.

In addition, in one example, the rear end of the seal presser 60 and the opening of the first cylinder 11 may have a pair of engaging parts that engage with each other, so as to position the seal presser 60 in the circumferential direction. The pair of engaging parts is not particularly limited as long as it can be positioned in the circumferential direction, such as a notch and a convex part engaging with the notch, a concave part formed in the axial direction and a convex part engaging with the concave part, etc. By using a structure including such a pair of engaging parts, the seal presser 60 can be easily configured so that the first through hole 67 and the second through hole 69 are located on the lower surface side in the circumferential direction.

A concave portion 62a formed continuously in the circumferential direction is provided on the outer periphery of the retaining portion 62. An O-ring 66 is arranged in the concave portion 62a. The O-ring 66 seals the outer periphery of the retaining portion 62 and the inner periphery of the opening portion of the first cylinder 11 in a liquid-tight manner.

In addition, an example of a seal compression member 60 includes a circular partition wall 68. The partition wall 68 is formed continuously in the circumferential direction at a position between the first through hole 67 and the second through hole 69 in the axial direction. The partition wall 68 protrudes radially inward from the peripheral wall 61. The inner diameter of the partition wall 68 is larger than the outer diameter of at least the flat washer 57.

In addition, the axial distance L1 from the partition wall 68 to the first through hole 67 is smaller than the height L2 of the partition wall 68. Similarly, the axial distance L3 from the partition wall 68 to the second through hole 69 is smaller than the height L2 of the partition wall 68. The height L2 of the partition wall 68 is the size in the protruding direction (radial direction) relative to the inner surface of the peripheral wall 61.

In addition, a portion of the periphery of the first through hole 67 is formed along the end wall 63. In one example, the first through hole 67 includes a periphery formed along the outer edge of the end wall 63. In the illustrated example, the position of the periphery 67a1 on the rear side in the axial direction of the periphery of the first long hole-shaped portion 67a constituting the first through hole 67 along the length direction is substantially aligned with the position of the outer edge of the end wall 63.

FIG. 4 is a partial enlarged view of FIG. 1, showing the vicinity of the oil pan 100. FIG. 5 is a three-dimensional view showing an example of an oil pan. FIG. 6 is a cross-sectional view of an example of a reciprocating pump. FIG. 6 shows a cross section obtained by cutting the reciprocating pump 1 along the XZ plane at the position of the hole portion 111 of the oil pan 100. The oil pan 100 is a liquid containing device that contains liquid discharged from the first through hole 67 and the second through hole 69. An example of an oil pan 100 temporarily contains liquid and discharges the contained liquid.

The oil pan 100 has a storage space S for storing liquids discharged from the first through hole 67 and the second through hole 69 of the seal pressing member 60. The storage space S is formed by dividing the bottom wall 101 and the side wall 103. In one example, the bottom wall 101 is roughly rectangular when viewed from the Z direction. In the illustrated example, one oil pan 100 is used to store liquids discharged from three seal pressing members 60 arranged in the X direction, so the length of the oil pan 100 in the X direction is longer than the distance between the through holes of the seal pressing member 60 at least at both ends in the X direction (the second through hole 69 in the example of FIG. 6).

The side wall 103 is provided in a vertical position on the periphery of the bottom wall 101. The side wall 103 surrounds the periphery of the bottom wall 101. That is, the side wall 103 includes: a first side wall 103a provided in a vertical position from the end edge of the driving portion 10 side of the bottom wall 101; a second side wall 103b provided in a vertical position from the end edge of the pump portion 30 side of the bottom wall 101; and a third side wall 103c and a fourth side wall 103d which connect the first side wall 103a and the second side wall 103b to each other. In addition, the third side wall 103c and the fourth side wall 103d are opposite to each other in the X direction and extend along the YZ plane. Supporting pieces 105 protruding outward from the wall surface are provided on the third side wall 103c and the fourth side wall 103d, respectively. In one example, a bolt hole 105a is formed on the supporting piece 105. The oil pan 100 is fixed to the crankcase 13 by bolts 105b penetrating the bolt holes 105a. When the oil pan 100 is fixed to the crankcase 13, the positions (i.e., height positions) of the ends of the first side wall 103a, the second side wall 103b, the third side wall 103c, and the fourth side wall 103d in the Z direction are preferably the same as each other. In addition, portions with different positions in the Z direction may be partially formed at the ends of the side wall 103.

In addition, the oil pan 100 includes a partition wall 107 protruding from the bottom wall 101. The partition wall 107 divides the storage space S into at least a first storage space S1 and a second storage space S2. That is, the partition wall 107 divides the bottom surface 102 formed by the bottom wall 101 into a first bottom surface area 102a corresponding to the first storage space S1 and a second bottom surface area 102b corresponding to the second storage space S2. An example of the partition wall 107 has the X direction as the length direction and extends along the XZ plane. In the illustrated example, the first storage space S1 is a space that is closer to the drive unit 10 side than the partition wall 107 in the storage space S. In addition, the second storage space S2 is a space that is closer to the pump unit 30 side than the partition wall 107 in the storage space S. Similarly, the first bottom surface area 102a is a portion of the bottom surface 102 that is closer to the drive unit 10 than the partition wall 107. In addition, the second bottom surface area 102b is a portion of the bottom surface 102 that is closer to the pump unit 30 than the partition wall 107.

When the oil pan 100 is mounted on the crankcase 13, the first bottom surface area 102a is located on the lower side of the first through hole 67 in the vertical direction. In addition, the second bottom surface area 102b is located on the lower side of the second through hole 69 in the vertical direction.

In one example, the height position of the partition wall 107 is lower than the height position of the side wall 103. In addition, in the case where a portion with a lower height position is partially formed in any of the side walls 103, the height of the partition wall 107 can also be formed to be lower than the portion with a lower height position. In the example shown in the figure, the height of the partition wall 107 is, for example, about half the height of the side wall 103, but the height position of the partition wall 107 is not limited to this.

A hole portion 111 penetrating the bottom wall 101 is formed in the second bottom surface area 102b. Thus, the second storage space S2 is connected to the outside of the storage space S through the hole portion 111. An example of an oil pan 100 has a plurality of hole portions 111 corresponding to a plurality of seal presses 60. In the illustrated example, three hole portions 111 are arranged in a manner separated from each other in the X direction corresponding to the three seal presses 60. When viewed from the Y direction, each hole portion 111 is opposite to the second through hole 69 (first through hole 67) of the corresponding seal press 60. In addition, the hole portion 111 is formed in the second bottom surface area 102b at a position closer to the drive portion 10 side (partition wall 107 side) than the center in the Y direction when viewed from the X direction. That is, the hole 111 is formed at a position closer to the partition wall 107 than to the second side wall 103b in the Y direction. A cylindrical portion 109 is formed on the lower surface (outer surface) of the bottom wall 101, which surrounds the hole 111 and protrudes from the lower surface. For example, the cylindrical portion 109 is cylindrical with the same inner diameter as the inner diameter of the hole 111.

When the oil pan 100 is connected to the crankcase 13 axially placed along the horizontal plane, the first bottom surface area 102a is inclined in one direction relative to the horizontal plane. In one example, the entire bottom surface area 102 including the first bottom surface area 102a is equally inclined relative to the horizontal plane. In the illustrated example, the bottom surface 102 of the bottom wall 101 is inclined downward from the second side wall 103b side toward the first side wall 103a side. That is, in the first bottom surface area 102a, it is inclined downward from the partition wall 107 side toward the first side wall 103a side, and in the second bottom surface area 102b, it is inclined downward from the second side wall 103b side toward the partition wall 107 side. Thus, due to the inclination of the bottom wall 101, the angle formed by the partition wall 107 and the portion of the bottom wall 101 constituting the first bottom surface area 102a is larger than 90 degrees. In addition, the above-mentioned hole portion 111 is arranged at a position lower than the center of the inclination direction in the second bottom surface area 102b inclined relative to the horizontal plane. That is, the hole portion 111 is arranged at the inclination lower side in the second bottom surface area 102b.

In one example, the material of the oil pan 100 is preferably a resin material that can transmit visible light. As an example of such a material, ABS (Acrylonitrile Butadiene Styrene) can be cited, but the material of the oil pan 100 is not limited thereto.

As described above, an example of the oil pan 100 is an oil pan 100 mounted on the reciprocating pump 1, wherein the reciprocating pump 1 comprises: a driving unit 10 including a first cylinder 11; a pump unit 30 including a second cylinder 31 axially opposite to the first cylinder 11; a reciprocating member 50 guided by the first cylinder 11 and the second cylinder 31 to reciprocate; an annular oil seal 70 at the first cylinder 11; The first cylinder 11 is in sliding contact with the reciprocating member 50; the annular low-pressure seal 49 is in sliding contact with the reciprocating member 50 in the second cylinder 31; and the seal pressing member 60 has a substantially cylindrical shape, surrounds a portion of the reciprocating member 50 in the circumferential direction, and is arranged between the oil seal 70 and the low-pressure seal 49, and the peripheral wall 61 of the seal pressing member 60 is formed with: a first through hole 67; and a first The oil pan 100 includes a through hole 69 formed at a position closer to the low-pressure seal 49 than the first through hole 67 in the axial direction. The oil pan 100 includes: a storage space S formed by a bottom wall 101 and a side wall 103 vertically disposed on the periphery of the bottom wall 101; and a partition wall 107 vertically disposed on the bottom wall 101 to divide the storage space S into at least a first storage space S1 and a second storage space S2. The bottom surface 102 formed by 101 is divided into a first bottom surface area 102a corresponding to the first receiving space S1 and a second bottom surface area 102b corresponding to the second receiving space S2. When the oil pan 100 is mounted on the reciprocating pump 1, the first bottom surface area 102a is located at the lower side of the first through hole 67 in the vertical direction, and the second bottom surface area 102b is located at the lower side of the second through hole 69 in the vertical direction.

In the above-mentioned reciprocating pump 1, the crankshaft 15 rotates, and the reciprocating member 50 connected to the crankshaft 15 by means of the connecting rod 17 and the piston pin 18 reciprocates. In the water absorption process, the reciprocating member 50 moves backward toward the drive part 10 side, thereby reducing the pressure in the pump chamber 37. As a result, the suction valve 38 of the first manifold 33 is opened and the discharge valve 43 is closed. The liquid is sucked into the pump chamber 37 through the suction port 39 and the suction valve 38. On the other hand, in the discharge process, the reciprocating member 50 moves forward toward the pump part 30 side, thereby pressurizing the pump chamber 37. As a result, the suction valve 38 is closed and the discharge valve 43 is opened. The liquid used in the pump chamber 37 is ejected toward the ejection port 32 through the ejection valve 43. That is, a pumping action is performed.

The oil seal 70 disposed between the first cylinder 11 and the seal presser 60 seals the first cylinder 11 liquid-tightly. Similarly, the low-pressure seal 49 disposed between the second cylinder 31 and the seal presser 60 seals the second cylinder 31 liquid-tightly. Thus, the oil seal 70 suppresses the oil in the first cylinder 11 from leaking into the seal presser 60. Furthermore, the low-pressure seal 49 suppresses the cooling water and the working fluid in the second cylinder 31 from leaking into the seal presser 60.

When the sealing performance of the low-pressure seal 49 and the oil seal 70 is reduced due to aging, etc., oil may leak from between the oil seal 70 and the plunger rod 51, and cooling water may leak from between the low-pressure seal 49 and the plunger sleeve 53. The leaked oil and the like are discharged through the seal pressing member 60. The above-mentioned oil pan 100 is installed on the lower side of the seal pressing member 60 of the reciprocating pump 1 to accommodate the liquid discharged from the seal pressing member 60. The peripheral wall 61 of the seal pressing member 60 is provided with a first through hole 67 close to the oil seal 70 and a second through hole 69 close to the low-pressure seal 49. Thus, when the liquid in the first cylinder 11 leaks from the oil seal 70 side, it is easy to discharge the liquid from the first through hole 67, and when the liquid in the second cylinder 31 leaks from the low-pressure seal 49 side, it is easy to discharge the liquid from the second through hole 69. The discharged liquid from the first through hole 67 is received in the first bottom surface area 102a, and the discharged liquid from the second through hole 69 is received in the second bottom surface area 102b. In this way, the liquid leaked from the first cylinder 11 and the liquid leaked from the second cylinder 31 are received separately, so that the leakage of the liquid (oil) from the first cylinder 11 can be properly grasped.

Alternatively, a hole portion 111 penetrating the bottom wall 101 may be formed in the second bottom surface area 102b, and a cylindrical portion 109 surrounding the hole portion 111 and protruding from the lower surface may be formed on the lower surface of the bottom wall 101. In this structure, the liquid accumulated in the second bottom surface area 102b can be discharged from the hole portion 111 to the outside. At this time, by connecting a hose or the like to the cylindrical portion 109, it can be discharged to any place. Alternatively, the liquid accumulated in the first bottom surface area 102a may be discharged from the hole portion 111 of the second bottom surface area 102b, for example, over the partition wall. Alternatively, the user may remove the oil pan from the reciprocating pump and discard the liquid accumulated in the first bottom surface area 102a.

Alternatively, the material of the oil pan 100 is a resin that can be penetrated by visible light. In this structure, the storage space S of the oil pan 100 can be visually confirmed from the outside. The user can easily know whether oil or cooling water is contained in the storage space S of the oil pan 100, that is, whether there is a malfunction in the oil seal 70 or the low-pressure seal 49. In addition, the material of the oil pan 100 can be a material that can penetrate visible light to the extent that it can be determined whether oil is contained in the storage space S.

Alternatively, when the oil pan 100 is connected to the reciprocating pump 1 axially placed along the horizontal plane, at least the first bottom surface area 102a of the bottom surface 102 is tilted relative to the horizontal plane. In this structure, the liquid accumulated in the first storage space S1 including the first bottom surface area 102a can move in one direction due to the tilt. Therefore, even if the liquid is a small amount, it is easy to confirm the liquid.

In addition, the hole 111 is arranged at a position lower than the center of the tilting direction in the second bottom surface area 102b tilted relative to the horizontal plane. Therefore, the liquid contained in the second bottom surface area 102b is prevented from being retained in the second bottom surface area 102b, and the liquid is easily discharged from the hole 111 as quickly as possible.

The angle formed by the partition wall 107 and the portion of the bottom wall 101 constituting the first bottom surface area 102a is greater than 90 degrees. In this structure, when the partition wall 107 is arranged along the vertical direction, the first bottom surface area 102a in the bottom surface 102 is inclined relative to the horizontal plane.

The height of the partition wall 107 can be lower than the height of the side wall 103. In this structure, when any one of the first storage space S1 and the second storage space S2 is filled with liquid, the liquid will pass over the partition wall 107 and move to any other space.

The above is an explanation of the implementation method of this disclosure, but the specific form is not limited to the above example.

FIG. 7 is a cross-sectional view showing another shape of the oil pan. In one example, the oil pan 200 of FIG. 7 can be used to replace the oil pan 100 of the reciprocating pump 1. The oil pan 200 differs from the oil pan 100 only in having the hole 113. The differences between the oil pan 200 and the oil pan 100 are described below.

The oil pan 200 includes a hole portion 113. The hole portion 113 is formed in the first bottom surface area 102a. The hole portion 113 passes through the bottom wall 101. Thus, the first storage space S1 is connected to the outside of the storage space S through the hole portion 113. An example of the oil pan 200 has a plurality of hole portions 113 corresponding to a plurality of seal presses 60. That is, three hole portions 113 are arranged in a manner separated from each other in the X direction corresponding to the three seal presses 60. Each hole portion 113 is opposite to the first through hole 67 of the corresponding seal press 60. In addition, the hole portion 113 is formed in the first bottom surface area 102a at a position closer to the pump portion 30 side (partition wall 107 side) than the center in the Y direction, that is, at a position higher than the center in the tilt direction when viewed from the X direction. In other words, the hole portion 113 is formed at a position closer to the partition wall 107 than to the first side wall 103a in the Y direction. A cylindrical portion 115 is formed on the lower surface (outer surface) of the bottom wall 101, which surrounds the hole portion 113 and protrudes from the lower surface. For example, the cylindrical portion 115 is cylindrical with an inner diameter that is the same as that of the hole portion 113.

According to the above structure, the hole portion 113 and the hole portion 111 are provided in the first bottom surface area 102a and the second bottom surface area 102b, respectively, so that the liquid (oil) accumulated in the first storage space S1 and the liquid (cooling water) accumulated in the second storage space S2 can be discharged respectively. In addition, in the first bottom surface area 102a, the hole portion 113 is provided on the inclined upper side, so that the liquid (oil) discharged from the first through hole 67 is easily accumulated at a position closer to the inclined lower side than the hole portion 113. Therefore, even if the liquid discharged from the first through hole 67 is a small amount, it is easy to confirm the leakage of the liquid. On the other hand, the hole portion 111 is provided on the inclined lower side of the second bottom surface area 102b, so that the liquid (cooling water) discharged from the second through hole 69 can be quickly discharged from the hole portion 111.

In addition, the oil pan may not have the holes 111 and 113 for discharging the contained liquid. In this case, when the liquid is contained in the oil pan, the user may remove the oil pan from the reciprocating pump and discard the contained liquid.

57: Flat washer

66: O-ring

67: 1st through hole

69: Second through hole

100: Oil pan

101: Bottom wall

102: Bottom

102a: 1st bottom surface area

102b: Second bottom area

103: Side wall

103a: 1st side wall

103b: 2nd side wall

107: Partition wall

109: cylindrical part

111: Hole

S: Containment space

S1: Containment Room 1

S2: Second containment space

Claims (10)

An oil pan is installed on a reciprocating pump (1), wherein the reciprocating pump (1) comprises: a driving part (10) including a first cylinder (11); a pump part (30) including a second cylinder (31) axially opposite to the first cylinder (11); a reciprocating member (50) guided by the first cylinder (11) and the second cylinder (31) to reciprocate; and an annular first sealing member (70) in the first cylinder (11) and in contact with the reciprocating member. (50) in sliding contact; an annular second seal (49) in sliding contact with the reciprocating member (50) in the second cylinder (31); and a seal pressing member (60) having a cylindrical shape, surrounding a portion of the reciprocating member (50) in the circumferential direction, and arranged between the first seal (70) and the second seal (49), wherein a first through hole (67) and a second through hole (69) are formed on a peripheral wall (61) of the seal pressing member (60), The oil pan is formed at a position closer to the second sealing member (49) than the first through hole (67) in the axial direction. The oil pan comprises: a receiving space (S) divided by a bottom wall (101) and a side wall (103) vertically arranged on the periphery of the bottom wall (101); and a partition wall (107) vertically arranged on the bottom wall (101) so as to divide the receiving space (S) into at least a first receiving space (S1) and a second receiving space (S2). The bottom surface (102) formed by the oil pan (1) is divided into a first bottom surface area (102a) corresponding to the first receiving space (S1) and a second bottom surface area (102b) corresponding to the second receiving space (S2). When the oil pan is mounted on the reciprocating pump (1), the first bottom surface area (102a) is located on the lower side of the first through hole (67) in the vertical direction, and the second bottom surface area (102b) is located on the lower side of the second through hole (69) in the vertical direction. The oil pan as described in claim 1, wherein a hole portion (111) penetrating the bottom wall (101) is formed in the second bottom surface area (102b), and a cylindrical portion (109) surrounding the hole portion (111) and protruding from the bottom surface is formed on the lower surface of the bottom wall (101). An oil pan as described in claim 1 or 2, wherein the material of the oil pan is a resin that is transparent to visible light. An oil pan as claimed in claim 1 or 2, wherein, when the oil pan is connected to the reciprocating pump (1) mounted along the horizontal plane in the axial direction, at least the first bottom surface area (102a) of the bottom surface (102) is inclined relative to the horizontal plane. The oil pan as described in claim 4, wherein the angle formed by the partition wall (107) and the bottom wall (101) constituting the first bottom surface area (102a) is greater than 90 degrees. An oil pan as described in claim 1 or 2, wherein the height of the partition wall (107) is lower than the height of the side wall (103). The oil pan as described in claim 4, wherein a hole portion (113) penetrating the bottom wall (101) is formed in the first bottom surface area (102a), and a cylindrical portion (115) surrounding the hole portion (113) and protruding from the bottom surface is formed on the lower surface of the bottom wall (101). The oil pan as described in claim 7, wherein the hole portion (113) is arranged at a position above the center of the tilting direction in the first bottom surface area (102a) tilted relative to the horizontal plane. The oil pan as claimed in claim 2, wherein, when the oil pan is connected to the reciprocating pump (1) mounted along the horizontal plane in the axial direction, the second bottom surface area (102b) in the bottom surface (102) is inclined relative to the horizontal plane, and the hole (111) is arranged at a position lower than the center of the inclination direction in the second bottom surface area (102b) inclined relative to the horizontal plane. A reciprocating pump, wherein the reciprocating pump comprises: a driving part (10) including a first cylinder (11); a pump part (30) including a second cylinder (31) axially opposite to the first cylinder (11); a reciprocating member (50) guided by the first cylinder (11) and the second cylinder (31) to reciprocate; an annular first sealing member (70) in sliding contact with the reciprocating member (50) in the first cylinder (11); and an annular second sealing member (70). a sealing member (49) which is in sliding contact with the reciprocating member (50) in the second cylinder (31); a sealing member pressing member (60) which has a cylindrical shape, surrounds a portion of the reciprocating member (50) in the circumferential direction, and is arranged between the first sealing member (70) and the second sealing member (49); and an oil pan (100) which is arranged below the sealing member pressing member (60) and has a peripheral wall (61) of the sealing member pressing member (60): a first through hole ( The oil pan (100) comprises: a receiving space (S) formed by a bottom wall (101) and a side wall (103) vertically disposed on the periphery of the bottom wall (101); and a partition wall (107) vertically disposed on the bottom wall (101) to divide the receiving space (S) into at least a first receiving space (S1) and a second receiving space (S2). The second receiving space (S2) is formed by dividing the bottom surface (102) formed by the bottom wall (101) into a first bottom surface area (102a) corresponding to the first receiving space (S1) and a second bottom surface area (102b) corresponding to the second receiving space (S2), wherein the first bottom surface area (102a) is located at the lower side of the first through hole (67) in the vertical direction, and the second bottom surface area (102b) is located at the lower side of the second through hole (69) in the vertical direction.

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