US2019784A - Pump construction - Google Patents

Description

NOV. 5, 1935. c GROEN 2,019,784

PUMP CONSTRUCTION Filed April 9, 1934 2 Sheets-Sheet 1 Nov. 5, 1935. c. GROEN 2,019,784

PUMP CONSTRUCTION Filed April 9, 1934 2 ShetsSheet 2 I1]. Ill

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Patented Nov. 5, 1935 UNITED STATES PUlVIP CONSTRUCTION Christopher Groen, Dubuque, Iowa, assignor to A. Y. McDonald Mfg. 00., Dubuque, Iowa, a

corporation of Iowa Application April 9, 1934, Serial No. 719,676

2 Glaims.

This invention relates to a new and improved pump construction, and more particularly to a power driven pump of the double acting cylinder type.

With pumps of this type as heretofore constructed, it has been usual to provide the intake and discharge valves in separate levels in the water end of the pump. In such constructions it is usual to mount valves on a. valve deck or plate which involves two lines of separation between water end sections, with two gaskets, and greater chances for leakage than with a single line of separation. Also such pumps are often so constructed that it is necessary to take out the discharge or pressure valves to reach the suction or intake valves.

It is an object of the present invention to provide a new and improved pump construction.

It is a further object to provide such a pump with a water end consistingof two separable parts, the separation of which makes all valves readily accessible.

It is a further object to provide a construction in which the discharge valves are carried by one member and the intake valves by the other member of the water end, all valves being located upon approximately the same plane.

It is also an object to provide a water end construction having the intake and outlet connections and the piston and cylinder carried by one member whereby the other member may be removed for valve repair or replacement without the necessity of disconnection of any other parts.

It is an additional object to provide a construction in which the entire water end may be removed without disturbing the packing chamber, gland and gland spring.

It is a further object to provide a pump construction in which the motor pedestal or bracket serves to support the water end and the power end which may be independently removed for replacement or repair.

It is also an object to provide a power end using a large hub for the power pulley, with an eccentric crank pin carried on the inner face of the hub.

It is an additional object to provide a splash lubricating system in which the lubricant is carried in one direction through a hollow hub by centrifugal force and returned in the opposite direction over the bearing face by oil grooves to return it to the sump in the housing.

Other and further objects will appear as the description proceeds.

I have shown a preferred embodiment of my invention in the accompanying drawings, in which Figure l is a longitudinal vertical section of the pump assembly taken on line l--l of Figure 2; .5

Figure 2 is a plan View partly broken away to show the construction;

Figure 3 is a vertical longitudinal section taken through the water end of the pump;

Figure 4 is a vertical transverse section taken 10 on line 4--4 of Figure 2; and

Figure 5 is a transverse section through the intake and discharge valves, taken on line 5-5 of Figure 2.

In the drawings, the motor pedestal ll car- '15 ries the electric motor l2 which drives the pulley I4 through the belt l3. The power end comprises a housing l5 which is secured to a lateral face of the motorpedestal l l by means of bolts l6. As shown in Figure 2 the power housing l5 has 20 a horizontal extension I! which forms a bearing for the cylindrical hub l8 of the drive pulley l4. Opposite the portion I! the housing is formed with an opening closed by a plate I9 which may have a pressed fit in the opening. The housing 25 is provided with an extension 20 which, as best shown in Figure l, is provided with a filler plug 2| and a drain plug 22, for use in connection with the lubricant contained in the housing.

The hub I8 is hollow and is provided with a 30 central opening 23 which is slightly conical in form so that the and toward the drive pulley I4 is slightly larger than the inner end. The pulley end of the hub is closed by the plate 24 which may be pressed in place. Adjacent the pulley 5 end the radial holes 25 are provided for leading lubricant from the chamber 23 to the bearing face of the hub. The bearing face is provided with grooves 26 which are spirally arranged to return lubricant to the housing. A web 21 extends trans- 40 versely across the inner end of the opening 23 in the hub, and supports the crank pin 28 eccentrically of the axis of the hub, which pin may be a pressed fit in the web. On this crank pin 28 is pivoted the pitman 29, the other end of which 45 is pivotally connected through pin 30 to the crosshead 31 which reciprocates in the crosshead guide 32.

The oil slinger 33 is secured to the web 21 by means of the machine screw 34. The slinger 33 is provided with the inturn'ed corners 35 which engage the sides of the web 21, as shown in Figure 1, to maintain the slinger in the proper radial position. An outer corner of the slinger is turned out, as shown at 36, to dip into the oil in the housing and sling it upon the moving parts and into the openings on either side of the web 21, so that it passes into the hub chamber 23.

The piston rod 37 passes through the oil bevel plates 38 and 39 which are pressed into the opening 40 in the side of the motor pedestal II, and through the stufiing box 4| which is pressed into an aligned opening in the opposite side of the pedestal H. The stuffing box contains the packing 42 which is engaged by the gland 43. The gland is pressed against the packing by the spring 44 which is coiled about the piston rod 31 and has its opposite end bearing against the oil bevel plate 38.

The water end comprises the base member 45 which is secured to a lateral face of the pedestal II by means of the bolts 46. The cover member 41 is carried on the base member 45 and is secured in place by means of'the screw 48. The base member 45 carries the cylinder 50 into which is fitted the piston assembly comprising the disc 5|, the cups 52 and washers 53, all of which are held in place by the nut 54 on the end of the piston rod 31. The opposite ends of the base member are formed with the separated water chambers 55 and 56 which are in communication with the opposite end of the cylinder 50.

As best shown in Figure 4, the base member 45 has formed therein the intake passage 51 and the discharge passage 58, these passages being located upon opposite sides of the cylinder 50 and between the Water chambers 55 and 56. The two passages each terminate in the upper face of the base member so as to communicate with chambers formed in the cover member 41. The passages 51 and 58 have lateral terminals formed in the sides of the base member 45 which are threaded to receive the intake pipe 59 and the discharge pipe 60. The base member 45 is provided with the drain plugs 6| and 62 communieating with the water chambers 55 and 56. The outer end of the base member 45 is provided with the flanged rear plug 63 which is threaded into an opening aligned with the cylinder 50 and larger than the cylinder so that it serves for the introduction and removal of the cylinder and piston head assembly.

The cover member 41 is provided with the longitudinal web or division wall 64 which serves to divide the member into an intake air chamber 65 and a discharge air chamber 66. As shown in Figure 4 these two chambers communicate with the intake and discharge passages respectively.

As is best shown in Figure 5, the discharge side of the base member 45 is provided with the upper wall 61 extending to and below the vertical wall 64. This wall 61 is provided with discharge openings 68, the upper edges of which are recessed to receive valve seat discs 69, each of which is provided with a plurality of openings 10. The valve'seat is fitted on a gasket H to prevent leakage. The flexible valve disc 12 rests upon the valve seat 69 and is held in place by means of the valve disc stopmember 13 which is secured by means of the bolt 14 fitting into a threaded opening in the base member 45. The valve seat discs may preferably be formed of brass and the flexible valve discs may be formed of rubber or suitable composition.

The lower face of the intake air chamber 65 in the cover member is. closed by a wall 15 which connects the side wall of the cover member and the partition wall 64. This wall 15 is provided with a pair of openings 16 having recessed edges into which the valve seat discs 11 are fitted against the gaskets 18. The intake valve members 19 are secured in place upon the seats by the valve disc stops 89 which are held by the bolts 8| threaded into the lugs 82 extending 5 downwardly into the air chamber.

In the operation of the pump, referring first to the power end, it will be understood that the pulley I4 is rotated by means of power supplied from the motor by the belt l3. As it rotates, the 10 hub I8 rotates and carries with it the lubricant slinger 33. This slinger slings lubricant which finds its way into the opening 23 inthe hub and out through ports 25 to the bearing surface along which it is worked inwardly by means of the 15 groove 26 and thus returned to the interior of the housing. Lubricant is also splashed upon the crank pin and pitman connection so as to keep it adequately lubricated and is further splashed onto the crosshead guide 32 where it 20 lubricates properly the crosshead. Loss of lubricant into the motor pedestal is prevented by means of the members 38 and 39. The location of the lubricant filler plug 2| prevents overfilling the housing with lubricant as this plug is at such 25 a level as to prevent filling the housing to a level such that lubricant will normally extend into the cavity in the hub l8.

Referring now to the water end, the packing around the piston rod 31 is maintained properly 50 against the rod by means of the spring-pressed gland 43. This also acts as a further preventive of leakage of oil into the water end to contami nate the water. It will be apparent that the pump is double-acting and serves to draw in '35 water to one water chamber while it is forcing water out of the water chamber at the opposite end. The water comes into the chamber 65 through passage 51 from the intake pipe 59. As the suction is created in the corresponding water '40 chamber 55 or 56, depending upon the direction of movement of the piston, the water is sucked past the valve disc 11 into that chamber. The movement of the valve disc is limited by the member 80. At the same time the suction in 45 that water chamber will hold the corresponding discharge valve 12 tight against its seat disc 69. Upon the opposite end of the pump the pressure will hold the intake valve 19 against its seat and will force upwardly the discharge valve 12 against 50 its member 13, thus forcing water into the dis charge chamber 66 from which it will pass through passage 58 to discharge pipe 60.

It will be apparent that the water end is adapted for easy inspection and the replacement or 55 repair of piston and valve parts. The piston and cylinder parts are readily reached by removing the plug 63. All four of the valves are readily accessible by removing the screw 48 and lifting the cover member 41. The two intake valves are 60 carried on the lower face of the cover member and thus are accessible, while the discharge valves are carried on the upper face of the base member and are thus quickly accessible. It is not necessary to remove any valvein order to in- 65 spect or replace another, such as is the case with types of pump construction where the valves are on superposed decks. Also, the water end assembly comprises but two separable parts so that there is a single gasket, which minimizes leakage 70 and difficulty in securing a tight fit. The intake and discharge pipes are both connected to the base member so that it is unnecessary to disconnect these pipes in inspecting or repairing either the valves or the piston construction.

It is to be understood that the form of construction shown is illustrative only, as it is capable of change and variation to meet differing conditions and requirements, and I contemplate such changes and modifications as come within the spirit and scope of the appended claims.

I claim:

1. In a pump construction, a water end comprising a base member and a cover member, the base member housing a pump cylinder, water chambers at each end of the cylinder, a valve carried by the base member in communication with each Water chamber, a valve carried by the cover member in communication with each water chamber, and intake and discharge passages formed in the base member and communicating with the interior of the cover member, said passages having ports in the base member for connection to intake and discharge pipes.

2. In a pump construction, a water end comprising a base member and a cover member, a pump cylinder housed in the base member, a pumpchamber located in the base member at each end of the cylinder, a discharge valve carried by the upper face of the base member in communication with each pump chamber, intake valves carried on the lower face of the cover member and extending into each pump charm her, a partition formed in the cover member dividing it into intake and discharge chambers, and

intake and. discharge passages formed in the base member and communicating at its other end with I a chamber in the cover member.

CHRISTOPHER GROEN.

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