CN106989009B - positive displacement pump - Google Patents

Abstract

A kind of rotary external positive displacement pump installed, the positive displacement pump has at least two transfer bodies (7, 8), the transfer body (7, 8) it is driven with being clocked in relation to each other and is fastened to associated axis (9, 10) end side, by means of the first bearing (13 of radial effect, 14) and by means of radial and axial effect second bearing (15, 16) each axis (9 is installed, 10), the axis (9, 10) it is coupled to each other by means of synchromesh gear mechanism (17), wherein, the bearing is mounted in the bore for the shell for being manufactured to single-piece, the synchromesh gear mechanism configuration is between the corresponding bearing.

Description

Positive displacement pump

Technical field

The present invention relates to a kind of rotary external positive displacement pump installed, which has at least two transfer bodies (displacing body) (7,8), the transfer body (7,8) are driven and are fastened to associated with being clocked in relation to each other Axis (9,10) end side, first by means of the bearing of radial effect (13,14), second by the axis of radial and axial effect It holds (15,16) and each axis (9,10) is installed, the axis (9,10) is coupled to each other by means of synchromesh gear mechanism (17).

Background technology

The rotary volume pump in the form of gear pump is just had learned that from 17th century early stage.In modern pump, transfer Body is fastened onto the axis mounted on the outside for the product department for flowing through product to be communicated.

Via the motor driven to an axis in axis from outside transfer tube.It can be by means of the transfer that is engaged with each other Body drives the second axis.However, this leads to the apparent abrasion of transfer body, especially in the case of spiral pump, this abrasion are first Service life can be reduced, secondly because abrasion leads to contamination of products, particularly, if using the pump in health field, this Kind pollution is flagrant.Health field should be understood as referring to especially food and makeup industry.

Therefore, it mainly creates and pumps the design of itself, wherein the second axis is connected to first axle via synchromesh gear mechanism.Turn Moving body can then design as follows：Transfer body is being not in contact with, in fact without abrasion is running.

There is extra high requirement to the bearing arrangement of the axis in the pump.Due to the reason run in contactless method, In order to avoid shifting the undesirable contact of body, bearing arrangement must be very rigid and has low clearance.Meanwhile bearing arrangement exists Big axial force must be absorbed in the case of particular pump type, particularly in the case of single current spiral pump.In order to meet The requirement must have certain axially spaced-apart between radial support point and axial supporting point, which determines The external dimensions of pump.Especially in the case that high-revolving, as the interval as a result, it is difficult to be fully cooled and lubricate bearing.

Synchromesh gear mechanism is typically configured in the outside of the supporting point of axis, this additionally increases the total length of pump.In the presence of Following other known the case where pumping：Wherein, synchromesh gear mechanism configures between the support points.Due to the small tooth of gear mechanism The diameter of wheel is more than the interval between the axis of axis, so pinion gear can not pass through bearing hole (bearing bore) quilt from both sides Anyway it is inserted into shell, the result is that shell is necessarily constructed as two pieces, the bearing hole for journal bearing is set to one Point, the bearing hole for cod is set to another part.Due to the small reason of permissible location error, the construction is very big Ground increases manufacture and the assembling complexity of pump.

Invention content

It is therefore intended that provide one kind being made that improved pump in particular, to disadvantages mentioned above.

According to the present invention, the purpose is realized by means of a kind of rotary external positive displacement pump installed, the positive displacement pump With at least two transfer bodies, the transfer body is driven and is fastened to the end of associated axis with being clocked in relation to each other Side, the first bearing by means of radial effect and the second bearing by means of radial and axial effect install each axis, institute It states axis to be coupled to each other by means of synchromesh gear mechanism, the positive displacement pump has been developed by following facts：The bearing be mounted to by It is fabricated in the bore of the shell of single-piece, the synchromesh gear mechanism configuration is between the corresponding bearing.

The multiple advantages of correspondence structural belt of the pump.Due to the one-piece construction of shell, so reducing housing parts phase For mutual manufacture and assembling tolerance, the production as a result pumped becomes simpler and more reliable.Here, in the context of the present invention In, the one-piece construction of shell should be understood as that all bearing holes of bearing are set to any configuration of the same part of shell. This further includes the separate part not comprising any bearing hole there is no shell is excluded.

Simultaneously as synchromesh gear mechanism be assembled between the support points for necessary to function reason be spaced in, institute It can be reduced with the total length of pump.Synchromesh gear mechanism can in a circulating manner be soaked by the pinion gear of the synchromesh gear mechanism Enter into oil sump and additionally assist in oil output at mist of oil on the direction of bearing the sufficient lubrication and cooling of bearing.It is logical The uniform lubrication of all bearings can be realized and cooled down with minimum complexity between the support points by oil sump positioning by crossing.

According to embodiment of the present invention, pump has been developed as follows：The synchromesh gear mechanism has each other Two pinion gears of engagement, the diameter of the pinion gear are more than the interval between the axis of the axis.

Another embodiment according to the present invention, the pinion gear all have the tooth form edge for being fastened onto supporter.

If a preferred embodiment according to the present invention, the maximum outside diameter of the supporter is less than the axis Interval between axis, then the axis can utilize the supporter after installation, be pushed into the shell by the bearing hole. Tooth form edge can be open by separate housing between the support points, be pushed along axis, and can be fastened on supporter.

According to embodiment of the present invention, the side that the supporter is matched with non-shape and/or shape matching locks Formula is anchored on the axis.For example, connecting (feather by means of shrinking assembly (shrink-fitting) and/or known feather key Key connection) carry out above-mentioned fastening.

A development according to the present invention, the tooth form edge are anchored on the supporter in such a way that non-shape is matched.It is non- Shape matching connection enables at least one of tooth form edge tooth form edge that can unclamp and at least one tooth form edge is made to exist It is rotated on supporter, for the rotational orientation of transfer body relative to each other.Here, when solution unless shape matching connection when, tooth Shape edge can preferably be rotated freely through with polarizers of big angle scope, and tooth form edge particularly preferably can be with one or several complete turns freely Rotation.

Property embodiment according to an example of the present invention, by means of screw thread grip block by the tooth form edge with non-shape It is anchored on the supporter with mode.

In an exemplary embodiment of the present invention, the pump is single current spiral pump.

Description of the drawings

Hereinafter it will illustrate the present invention using some exemplary drawings, wherein：

Fig. 1 shows pump according to an aspect of the present invention；

Fig. 2 shows the horizontal sectional views of pump according to another aspect of the present invention；

Fig. 3 shows the vertical section figure of pump according to another aspect of the present invention；

Fig. 4 shows the horizontal cross-section of the sealing of the product department across pump；And

Fig. 5 shows the fixed plate of pump.

Specific implementation mode

Fig. 1 shows pump 1 in a perspective view, which is substantially made of driving portion 2 and product department 3.Shown in In example, which is the single current spiral pump (hygienic single-flow screw-spindle pump) of health.

The driving portion 2 of pump 1 has driving shaft neck 4, and by means of the driving shaft neck 4, pump 1 can be connected to drive motor (not shown), the product department 3 for pumping 1 have product inlet 5 and products export 6.In the case where pumping 1 invertible operation, product enters Mouth 5 and products export 6 can exchange in a manner of dependent on direction of transfer herein.

The internal structure of pump 1 is shown in figure 2 and figure 3.In product department 3, two discharge screw rods being engaged with each other (displacing screw) 7,8 is configured to be driven by two parallel axis 9,10.Discharge screw rod 7,8 is plugged in axis 9,10 and borrows The assembly parts 11,12 helped in the example shown are releasably secured to axis 9,10 in a manner of shape matching locking.

Axis 9,10 extends product department 3 and enters in driving portion 2, and at driving portion 2, axis 9,10 is first by means of radial direction It the needle bearing 13,14 of effect and is mounted by means of the angular contact ball bearing 15,16 radially, axially acted on.Shown in In example, in every case, angular contact ball bearing 15,16 is made of three bearings, these three bearings are existed with a Bearing configuration The mode at the rear of another bearing configures and in order to succinctly be described as a bearing.With the pinion gear 18 being engaged with each other, 19 synchromesh gear mechanism 17 configures between bearing 13,14 and bearing 15,16.Synchromesh gear mechanism 17 will be via drive shaft axis The movement that neck 4 is applied to axis 10 passes to axis 9, as a result the synchronous rotary in opposite direction of discharge screw rod 7,8.

Particularly, there is high need for the bearing of single current spiral pump 1 13,14,15,16 and synchromesh gear mechanism 17 It asks.In order to realize that high efficiency degree, discharge screw rod 7,8 are engaged with each other in a manner of discontiguous with minimum clearance.In order to keep away Exempt from the contact (if discharge screw rod 7,8 contacts, discharge screw rod 7,8 is likely to be broken) of discharge screw rod 7,8, synchromesh gear mechanism 17 It therefore needs that there is great rigidity with both bearing arrangements and clearance (play) is low.In addition, especially high transfer rate and In the case of high viscosity or pasty product, the single current that must be absorbed by angular contact ball bearing 15,16 as axial force constructs As a result, high responsive to axial force in axis 9,10.

In order to bear top load, bearing 13,14,15,16 must be cooled continuously.For this purpose, in the driving portion 2 of pump 1 Middle setting oil circuit 20.Here, pinion gear 18,19 is immersed in oil sump, and generates mist of oil in driving portion 2, which enters In bearing 13,14,15 and 16, while lubricating and cooling bearing 13,14,15 and 16.

It is close at the product side end of driving portion 2 by means of Simmer ring 21,22 in order to prevent outside oil leakage to driving portion 2 Seal axis 9,10.Other Simmer ring 23 is set and drives shaft neck 4 for sealing.

Pump 1 assembling process in, due to the function of pinion gear 18,19 cause pinion gear 18,19 diameter be more than axis 9, Interval between 10 axis produces difficulty, and thus the bore 24,25 of the outer ring 26,27 of angular contact ball bearing 15,16 is straight Diameter is necessarily less than the interval between the axis of axis 9,10.Therefore, in the case where being mounted with pinion gear 18,19, axis 9,10 cannot lead to Bore 24,25 is crossed to be introduced into the driving portion 2 of pump 1.

Therefore it is proceed as follows assembling：Before assembly, the inner ring 28 of needle bearing 13,14,29, pinion gear 18,19 are used Supporter 30,31 and angular contact ball bearing 15,16 be installed in axis 9,10.For this purpose, the inner ring 28,29 of needle bearing 13,14 It is assembled to axis 9,10 with the contraction of angular contact ball bearing 15,16, thus connects (feather key by means of feather key Connection) supporter 30,31 is fixed on axis 9,10 by (not shown).

In the shell 34 of driving portion 2, the outer ring 35,36 of needle bearing 13,14 in corresponding bore 37,38 to it is related The box for needle or pin 41,42 of connection is fixed.

The component 28,29,30,31,15,16 for being installed on axis 9,10 is respectively less than the axis of axis 9,10 with the outer diameter of these components Between the mode at interval determine size, the result is that pre-assembled axis can be pushed into drive towards product department 3 by bore 24,25 In dynamic portion 2.Here, when being pushed on axis 9,10, tooth form edge 39,40 is guided by the assembling opening 43 of shell.One or Multiple fixed plates 46 are then tightened, and are used for the axial restraint of axis 9,10 and angular contact ball bearing 15,16.

After axis 9,10 is mounted by means of the fixation of angular contact ball bearing 15,16 and in such a way that axial direction is zero-lash, Synchromesh gear mechanism 17 is finally assembled in a subsequent step.For this purpose, being loosely placed in when axis 9,10 is pushed into The tooth form edge 39,40 of axis 9,10 is pushed out into supporter 30,31, and at supporter 30,31, tooth form edge 39,40 tight fits are in place And it is engaged with each other.For this purpose, supporter 30,31 has backstop shoulder 47,48 with product department 3 opposite facing side.Grip block 49, 50, it 51,52 is then loaded into from face of the side of product department 3 against tooth form edge 39,40.Grip block 49,50,51,52 is each In the case of be approximate semi-ring construction and there is end side step, the result is that in every case, two grip blocks can be assembled with shape At a flat ring (flush ring).The ring of assembling is fastened to supporter 30,31 subsequently, by means of bolt and makes tooth form edge 39,40 Backstop shoulder 47,48 is compressed, as a result they are fixed with non-shape matching way.

Since the bore 24,25 of angular contact ball bearing 15,16 and the bore 35,36 of needle bearing 13,14 can made It makes in the shell 34 for single-piece and is formed into the coaxial fact, so extremely low clearance can be made, particularly, each bore 24, 25, the risk of 35,36 radial missing relative to each other is lowered.

The driving portion 2 of pump with by the intermediate flange 53 with product inlet 5, conveyer shell 54 and with products export 6 Closure flange 55 construct product department 3 abut.Intermediate flange 53 is supported on the shell 34 of driving portion 2 by means of mounting collar 56 On, as a result leakage space 58 is formed between the shell 34 of driving portion 2 and a driving side wall 57.If Simmer ring 21,22 One of failure, the leakage space 58 ensure that the oil from driving portion 2 can be discharged from pump, transmitted without polluting Product, this has basic meaning in use of the especially pump in health field (such as food or makeup industry).

Axis 9,10 is projected by the seal receptacle 59,60 in wall 57 in product area, and during by wall 57, By means of in order to succinctly in figs 2 and 3 unshowned bearing ring seal 61,62 and sealed.It is more detailed that Fig. 4 will be used hereinafter Ground illustrates the construction of the sealing.

Due to bearing ring seal 61,62 constructions having the same, will be only described here bearing ring seals 61.All explanations It is applied equally to bearing ring seal 62.

Bearing ring seal 61 is configured to two sections (two stages), and therefore have fixed part 63 and two rotating parts 64, 65.First rotating part 64 be placed in the driving side of axis 9 and the pin 66,67 by means of being swirled in axis 9 and by axially, it is rotatable Ground is kept.Fixed part 63 is made of two slip rings 68,69 to be supported each other by means of ring spring 70.Including two slip rings 68,69 It is enclosed in as in lower sleeve 71 with the unit of ring spring 70：The sleeve 71 is inserted into seal receptacle 59 and herein by axis It is supported in raised 72 to ground.

Correspondingly, the second rotating part 65 is made of the slip ring 73 being enclosed in pot portion (pot) 74, and the pot portion 74 is propped up Support the step 75 in axis 9 and by means of 7 fixed clamp of discharge screw rod in the step 75 of axis 9.Driving portion 76 is swirled to pot portion 74 In, which prevents slip ring 73 from being rotated relative to pot portion 74.

By means of the power of ring spring 70, slip ring 68 is made to compress rotating part 64, slip ring 69 is made to compress slip ring 73, as a result they are tight It tightly supports each other and relative to 58 sealed product space 77 of leakage space.Here, particularly, compatible by product and low abrasion Material manufacture slip ring 69 and 73.

It is rinsed between slip ring 68,69,73 and axis 9 by means of that can be the compatible liquid of product of such as distilled water Intermediate space.This is for cooling down slip ring and will be transported away across the product form part slip ring.By in wall 57 Channel executes the inwardly or outwardly conveying of liquid, is being not shown in figure the channel for simplicity.

Pump 1 operating process in, it may appear that in product space 77 be vacuum the case where.Sleeve 71 is due to ring in order to prevent Border pressure is pressed into product space 77, in the worst cases as a result, pollutant can enter in product, sleeve 71 It protrudes past the wall 57 in driving side and there is circumferential slot 78 there.It is pushed into the fixed plate in leakage space 58 from outside 81 finger portion 79,80 (Fig. 5) is joined in the slot 78.As a result, sleeve 71 is axially locked, the result is that sleeve 71 cannot be by It is pressed into product space.It resists and rotates in order to ensure sleeve 71, at a position, slot 78 has axial knurled portions 82, should Axial knurled portions 82 and the protrusion 83 of fixed plate 81 interact.

Fixed plate 81 is illustrated in greater detail in Figure 5.There are two the webs in the finger portion 79,80 in outside and centre for fixed plate tool Portion (middle web) 84, two finger portions 79,80 and web portion 84 adapt to the slot bottom of slot 78 in terms of profile.Generally, They surround the angle more than 180 ° to a certain extent, and as a result when fixed plate 81 is pushed into, it is flexibly curved outward to refer to portion 79,80 Song then recoils to their initial position.By means of the seam engaged with fixing bolt 87 (Fig. 4) when fixed plate is pushed into 85,86 assistant springs deform.Small rack 88 is set in the centre of web portion 84, which is used to form protrusion 83.For this purpose, As shown in figure 4, platelet 89 for example can be fixed in holder 88 by means of spot welding.Optionally, in order to form protrusion 83, holder 88 The plane of fixed plate 81 itself can be bent away to a certain extent or in pearl is left from the plane of fixed plate 81.

In the free end of fixed plate 81, fillet bending is 90 ° approximate, accordingly acts as the handguard of leakage space 58 (protective hand guard)90.In order to tighten fixing bolt 87 simultaneously by means of spanner after being pushed into fixed plate 81 Thus fixed plate 81 is fixed, there are enough gaps here.

The installation and removal of bearing ring seal 61,62 are extremely simple and carried out from product side by dismantling closure flange 55.

Rotating part 64 is guided from product side to axis, and is pulled to pin 66,67 always, and pin 66,67 is in installation driving portion 2 It has been screwed to before in the threaded hole of axis 9,10.It then guides on axis 9 and is made of slip ring 68,69, ring spring 70 and sleeve 71 Fixed part 63, and fixed part 63 is pulled to always in seal receptacle 59, and sleeve 71 is protruded from the wall 57 of driving side until circumferential slot 78.Next, fixed plate 81 is pushed into leakage space 58, as a result refers to portion 79,80 and web portion 84 is joined in slot 78.This In, sleeve by protrusion 83 be joined in knurled portions 82 and thereby, it is ensured that sleeve support it is anti-rotational in a manner of orient.Fixed plate by After being pushed completely into, in order to fix fixed plate, fixing bolt 87 is tightened.

Finally, the rotating part 65 being made of pot portion 74 and slip ring 73 is shifted onto on axis 9, until step 75.By means of discharge Bearing ring seal 61,62 is fixed in the installation of screw rod 7,8.

In the installation process of discharge screw rod 7,8, it is preferable that discharge screw rod 7,8 before being pulled to axis 9,10 relative to It orients each other, as a result corresponding screw thread is correspondingly engaged with each other.The product side end of discharge screw rod 7,8 and axis 9,10 has complementation The assembling element of shape, as a result rotation of the discharge screw rod 7,8 on axis 9,10 are prevented from.Additionally by means of assembly parts 11,12 Ensure shape matching locking connection.

Due to alloing discharge screw rod 7,8 to be only placed in discontinuous angular position because of shape matching locking connection On axis 9,10, therefore, in order to set the best contactless orientation of discharge screw rod 7,8 relative to each other, need to keep axis 9,10 opposite In mutually rotating.In order to avoid the premature wear of discharge screw rod 7,8, this is important.

For this purpose, the grip block 49,50 of tooth form edge 39 is relaxed to a certain extent by assembling opening 43, as a result tooth form edge 39 can rotate on supporter 30.Then by means of the gap between rotation setting discharge screw rod 7,8.In discharge screw rod 7,8 Correct position relative to each other, grip block 49,50 are clamped again, and as a result tooth form edge 39 is by fixed so that tooth form edge 39 again It cannot rotate.

After the adjustment of discharge screw rod 7,8, closure flange 55 is placed on conveyer shell.By means of the driving of pump Lid 91 in portion 2 closes assembling opening.Pump 1 is available after this.

The explanation of drawing reference numeral

1 pump

2 driving portions

3 product departments

4 driving shaft necks

5 product inlets

6 products exports

7,8 discharge screw rod

9,10 axis

11,12 assembly parts

13,14 needle bearing

15,16 angular contact ball bearing

17 synchromesh gear mechanisms

18,19 pinion gear

20 oil circuits

21,22,23 Simmer ring

24,25 bore (angular contact ball bearing)

26,27 outer rings (angular contact ball bearing)

28,29 inner rings (needle bearing)

30,31 supporter

32,33 inner rings (angular contact ball bearing)

34 shells

35,36 outer rings (needle bearing)

37,38 bore (needle bearing)

39,40 tooth form edge

41,42 box for needle or pin

43 assembling openings

44,45 ball case

46 fixed plates

47,48 backstop shoulder

49,50,51,52 grip block

53 intermediate flanges

54 conveyer shells

55 closure flanges

56 mounting collars

57 walls

58 leakage spaces

59,60 seal receptacle

61,62 bearing ring seal

63 fixed parts

64,65 rotating part

66,67 pin

68,69 slip ring

70 ring springs

71 sleeves

72 protrusions

73 slip rings

74 pot portions

75 steps

76 driving portions

77 product spaces

78 slots

79,80 finger portion

81 fixed plates

82 knurled portions

83 protrusions

84 web portions

85,86 seam

87 fixing bolts

88 holders

89 plates

90 handguards

91 lids

Claims (15)

1. a kind of rotary external positive displacement pump installed, the positive displacement pump have at least two transfer bodies (7,8), the transfer body (7,8) are driven and are fastened to the end side of associated axis (9,10) with being clocked in relation to each other, by means of radial effect First bearing (13,14) and each axis (9,10), institute are installed by means of the second bearing (15,16) of radial and axial effect It states axis (9,10) to be coupled to each other by means of synchromesh gear mechanism (17), which is characterized in that the bearing (13,14,15,16) is filled It is fitted in the bore (24,25,37,38) for the shell (34) for being manufactured to single-piece, synchromesh gear mechanism (17) configuration is in phase Between the bearing (13,14,15,16) answered.

2. positive displacement pump according to claim 1, which is characterized in that the synchromesh gear mechanism (17), which has, to be engaged with each other Two pinion gears (18,19), the diameter of the pinion gear (18,19) are more than the interval between the axis of the axis (9,10).

3. positive displacement pump according to claim 2, which is characterized in that the pinion gear (18,19), which all has, is fastened onto branch The tooth form edge (39,40) of support body (30,31).

4. positive displacement pump according to claim 3, which is characterized in that the maximum outside diameter of the supporter (30,31) is small Interval between the axis of the axis (9,10).

5. positive displacement pump according to claim 3 or 4, which is characterized in that the supporter (30,31) is matched with non-shape And/or the mode of shape matching locking is anchored on the axis (9,10).

6. positive displacement pump according to claim 3 or 4, which is characterized in that the tooth form edge (39,40) is matched with non-shape Mode is anchored on the supporter (30,31).

7. positive displacement pump according to claim 5, which is characterized in that the tooth form edge (39,40) is with the matched side of non-shape Formula is anchored on the supporter (30,31).

8. positive displacement pump according to claim 6, which is characterized in that the tooth form edge (39,40) is by means of screw thread grip block (49,50,51,52) are anchored on the supporter (30,31).

9. positive displacement pump according to claim 7, which is characterized in that the tooth form edge (39,40) is by means of screw thread grip block (49,50,51,52) are anchored on the supporter (30,31).

10. positive displacement pump according to any one of claim 1 to 4, which is characterized in that the pump is single current helical axis Pump.

11. positive displacement pump according to claim 5, which is characterized in that the pump is single current spiral pump.

12. positive displacement pump according to claim 6, which is characterized in that the pump is single current spiral pump.

13. positive displacement pump according to claim 7, which is characterized in that the pump is single current spiral pump.

14. positive displacement pump according to claim 8, which is characterized in that the pump is single current spiral pump.

15. positive displacement pump according to claim 9, which is characterized in that the pump is single current spiral pump.