CN108457851A - Retainer and the hydraulic pump including the retainer or motor - Google Patents
Retainer and the hydraulic pump including the retainer or motor Download PDFInfo
- Publication number
- CN108457851A CN108457851A CN201711029750.1A CN201711029750A CN108457851A CN 108457851 A CN108457851 A CN 108457851A CN 201711029750 A CN201711029750 A CN 201711029750A CN 108457851 A CN108457851 A CN 108457851A
- Authority
- CN
- China
- Prior art keywords
- retainer
- force
- bearing surfaces
- hydraulic pump
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/002—Reciprocating-piston liquid engines details; components parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rolling Contact Bearings (AREA)
- Reciprocating Pumps (AREA)
Abstract
A kind of retainer being used for hydraulic pump or motor, the retainer include with working surface, the working surface：Force-bearing surfaces, the active force that the force-bearing surfaces are used to bear to be applied in play by the component of hydraulic pump or motor；And end surface, the end surface are recessed relative to the force-bearing surfaces.
Description
Technical field
The embodiment of the present invention relates generally to retainer, and more particularly, to a kind of retainer and including being somebody's turn to do
The hydraulic pump or motor of retainer.
Background technology
Hydraulic pump or motor in the case of higher rotation speed or higher operating pressure, return plate and piston shoes can in the axial direction into
Row play.In order to limit the maximum shifting amount in the axial direction of return plate and piston shoes, usually using retainer or pressing plate, pacified
When being attached to, which does not contact with return plate and piston shoes, and is to maintain certain distance, at work, by return plate
And the play limitation of piston shoes is in a certain range.In general, the limitation return plate of retainer and the part of piston shoes play are (that is, carrying
The part of stress) surface be known as working surface, working surface carrying and the return plate and piston shoes of play are produced when contacting
Active force.
However, for the retainer of traditional design, in the case of higher rotation speed or higher operating pressure, stress excessively collects
In in two ends of the part of bearing stress, to be easy to be more than that the physics of the material for constituting retainer bears the limit, lead
The part cracking for causing bearing stress, seriously reduces the service life of retainer, hydraulic pump or motor, and technical staff has to frequently
Numerous replacement retainer, which increase the maintenance costs of equipment.
Invention content
It is an object of the invention to overcome or solve at least one of the above problem and the defect that the prior art has.
In an aspect, a kind of retainer being used for hydraulic pump or motor is provided, the retainer has worksheet
Face, the working surface include：
Force-bearing surfaces, the effect that the force-bearing surfaces are used to bear to be applied in play by the component of hydraulic pump or motor
Power；And end surface, the end surface are recessed relative to the force-bearing surfaces.
In one embodiment, the working surface includes two ends of the two opposite sides positioned at the force-bearing surfaces
Portion surface.
In one embodiment, the end surface includes relative to the inclined inclined-plane of the force-bearing surfaces, is parallel to institute
State one kind or combinations thereof in the parallel surface and curved surface of force-bearing surfaces.
In one embodiment, at least one long side of the working surface has arcuate shape, the end surface tool
There is arc angle in the range of 4 °~8 °.
In one embodiment, there are difference in height (Δ H), the height between force-bearing surfaces and the minimum point of end surface
Poor (Δ H) is spent in the range of 0.05mm~0.5mm.
In one embodiment, there is the retainer first part and second part, the first part to have opposite
In the first surface of working surface protrusion, the working surface is located on the second part.
In one embodiment, the first part has the work with the first surface and the second part
The curved surfaces that surface combines, the curved surfaces have the center of curvature identical with the arcuate shape of the working surface.
In another aspect, the retainer in a kind of hydraulic pump or motor, including above-described embodiment is provided.
Description of the drawings
Other features and advantages of the present invention are best understood from reference to example and attached drawing, wherein：
- Fig. 1 is the perspective diagram of retainer according to an embodiment of the invention；
- Fig. 2 is that the Zoom Side of the end indicated by the dotted line frame in Fig. 1 according to an embodiment of the invention regards signal
Figure；
- Fig. 3 is the schematic top plan view of the retainer in Fig. 1 according to an embodiment of the invention；
- Fig. 4 is curve graph according to an embodiment of the invention, show stress that the end of retainer is carried and
The variation that the deformation of generation is generated with the variation of arc angle；Fig. 5 is by retainer according to an embodiment of the invention
Schematic side view when being installed in place in hydraulic pump or motor.
Specific implementation mode
In the following description, via different embodiments of the invention, similar reference numeral will be for describing similar skill
Art feature.
Unless otherwise described, for provide technical characteristic that embodiment is specifically described can be with the feelings in other embodiments
The technical characteristic combination described by way of non-limiting example under condition.
Fig. 1 shows retainer or pressing plate 200 according to an embodiment of the invention.The retainer or pressing plate are for limiting
The return plate 230 of such as hydraulic pump or motor or the play of piston shoes 240 are made, Fig. 5 is will be according to an embodiment of the invention
Schematic side view when retainer 200 is installed in place in hydraulic pump or motor.For clarity of illustration, only illustrate in Fig. 5
Show to property that retainer 200 when being installed in place, return plate 230 and piston shoes 240 these three components, other component are omitted,
Screw 250 is by 200 fix in position of retainer, at this point, there are gaps between retainer 200 and return plate 230, as described below,
The gap is very little, usually 0.01mm-0.1mm, but for the sake of clarity, which is shown in expanded form.
As shown in Figure 1, retainer 200 has first part 210 and second part 220, according to practical situations, first
The height of part 210 can be higher than, be equal to and less than second part 220 height, these three situations are suitable for the present invention, are
For the sake of description is convenient, the feelings that second part 220 forms relative to first part 210 terraced structure to lower recess are only chosen
Condition is described, it should be appreciated that other two kinds of situations are also possible.First part 210 has first surface 212, at one
In example, it is provided with threaded hole 216,218 on the first surface so as to be threadedly coupled by screw 250, for example, spiral shell
Pit 216,218 is located at the both ends on the length direction of first surface 212, is connected through a screw thread and is fixed on retainer 200
In hydraulic pump or motor, to limit the return plate 230 of hydraulic pump or motor or the play of piston shoes 240.It is understood that as shown in the figure
Retainer 200 be integral type, i.e., first part 210 and second part 220 are integrally formed, but retainer can also be
Split type, i.e., first part 210 is separated from each other with second part 220 or retainer is in circumferential direction by two
Half portion constitutes (part that each half portion includes similar first part 210 and second part 220), or by more parts group
At.The modification of these retainers is each fallen in protection scope of the present invention.
As shown in Figure 1, second part 220 has working surface, working surface includes：For bearing by hydraulic pump or motor
The force-bearing surfaces 222 of active force that apply in play of component, first surface 212 is relative to working surface protrusion；With it is opposite
In the end surface 224,226 being recessed upper in downward direction of force-bearing surfaces 222 in Fig. 1, to which end surface 224,226 is in work
Return plate 230 or piston shoes 240 are not contacted when making, there are difference in height Δ H between force-bearing surfaces 222 and the minimum point of end surface
(referring to Fig. 2).End surface 224,226 is located at opposite end side or the edge side of force-bearing surfaces 222, as shown in Figure 1.Following article
As being appreciated that, although diagram working surface has the opposite end side or edge side for being located at force-bearing surfaces in Fig. 1
The end surface 224,226 of two recess, but as needed, working surface can also be provided only with positioned at force-bearing surfaces 222
The end surface 224 or 226 of one end or a recess of edge side.
According to an embodiment of the invention, it is installed in place in retainer 200 and at work, only force-bearing surfaces 222 and example
If the return plate 230 or piston shoes 240 of hydraulic pump or the play of motor contact and carry active force, the end surface 224 of recess,
226 not in contact with return plate 230 or piston shoes 240, to which stress be reduced or eliminated at the end of retainer or peripheral edge
It concentrates.
In one embodiment, first part 210 can also include curved surfaces 214, curved surfaces 214 and first surface
212, force-bearing surfaces 222 and end surface 224,226 combine.In one example, curved surfaces 214 are perpendicular to first surface
212, force-bearing surfaces 222 and end surface 224, at least one of 226.When retainer 200 is installed in place, second part
220 force-bearing surfaces 222 do not contact (not shown) with return plate 230 or piston shoes 240, and are to maintain certain distance, such as institute above
It states.(that is, upper and lower directions on) in Fig. 5 generates play, the force-bearing surfaces in the axial direction for return plate 230 or piston shoes 240 when work
222 carryings generated active force when being contacted with the return plate 230 of play or piston shoes 240, to realize limitation return plate 230 or
The effect of the play of piston shoes 240.
In one embodiment, as shown in Figure 1, second part 220 and/or first part 210 are arc, work on the whole
As surface can also be arc or working surface at least one long side it is arc.In one example, worksheet mask
There are radius of curvature identical with curved surfaces 214, the center of curvature and the arc angle along arc direction.It is appreciated that constituting step
The shape of the first part of shape structure, second part or other force-bearing surfaces is without being limited thereto, if with its defined by return plate
230 or the shapes of piston shoes 240 match.In one example, the retainer 200 is made of Cu alloy material, described
End surface 224,226 is for example molded by Milling Machining or rough forging.It can be as needed to the quantity of the end of lower recess
It it is 1 or 2, Fig. 1 shows the exemplary embodiment with 2 ends to lower recess.
Fig. 2 shows the Zoom Sides of the end indicated by the dotted line frame in Fig. 1 according to an embodiment of the invention to regard
Schematic diagram.As shown, difference in height Δ H is formd between force-bearing surfaces 222 and the minimum point of end surface 224,226, it is high
The poor Δ H of degree is preferably in the range of 0.05mm~0.5mm.In the illustrated embodiment, end surface 224,226 includes parallel
In parallel surface (such as solid line S of force-bearing surfaces 2221It is represented), relative to 222 inclined inclined-plane of force-bearing surfaces (by dotted line S3Institute
Show) or curved surface (by dotted line S2It is shown) and parallel surface S1, inclined-plane S3With curved surface S2Arbitrary combination, it should be appreciated that according to reality
Situation needs, and end surface 224,226 is not limited to include 3 kinds of forms, and practical upper end face 224,226 is necessarily
Include the parallel surface S parallel with force-bearing surfaces1, can be only by inclined-plane S3Or curved surface S2Composition, or there is arbitrary shape, only
Want end surface 224,226 lower than force-bearing surfaces 222.
In fig. 2, middle part and 2 have preferably constituted terraced structure to the end of lower recess, but middle part and to
The end of lower recess can also form other structures, when for example, by using inclined-plane, form ramp structure.
Fig. 3 shows the schematic top plan view of the retainer in Fig. 1 according to an embodiment of the invention, the curve of Fig. 4
Show the variation that the deformation of stress and generation that the end of retainer 200 is carried is generated with the variation of arc angle.
The end of retainer 200, more specifically, arc angle α, β (as shown in Figure 4) of end surface 224,226 is preferably at 4 °~8 °
In the range of or its length (or arc length) preferably in the range of 3mm-10mm, avoid the area of end surface 224,226
It is too small thus be unfavorable for being reduced or eliminated stress end concentration, while make the area of force-bearing surfaces 222 sufficiently large from
And the active force of return plate 230 or piston shoes 240 can be carried.The width of end surface 224,226 preferably with force-bearing surfaces 222
It is of same size.
Experiment is found, relative to difference in height Δ H, the width of the shape of end surface 224,226 and end surface 224,226
Degree, the length or arc angle of end reduce stress to be affected with what is deformed caused by stress：As shown in figure 4, arc angle
When in the range of 0 ° to 4 °, the stress of end and deformation drastically reduce, this shows and the conventional end not being recessed
Retainer is compared, retainer of the invention setting recess end can significantly be reduced or eliminated stress end collection
In, and the deformation of end is significantly reduced or eliminated；When arc angle is more than 4 °, the stress of end and deformation decline are less,
Curve tends towards stability, this indicates that when arc angle is more than 4 °, influence of the end for the reduction of stress and deformation gradually weakens, always
On body, the arc angle or length of end are bigger, and stress and deformation reduce more.
More specifically, referring to table 1, the deformation by stress and generation that certain arc angle lower end is carried is with arc angle
The ratio of the deformation of end is carried at 0 ° stress and generation is referred to as stress ratio and deformation ratio, this 2 parameters are retouched well
It has stated the stress of end and has deformed the variation with arc angle.Wherein, when arc angle is 8 °, stress ratio and deformation ratio difference
It is dropped rapidly to 52.69% and 47.57% when arc angle is 0 °；When arc angle increases to 10 °, stress ratio and deformation score
It is not slowly drop down to 51.26% and 46.82% when arc angle is 0 °.This is identical as the physical meaning that Fig. 4 is indicated, but end
Arc angle or length be not the bigger the better because this can reduce the area of force-bearing surfaces 222 so that force-bearing surfaces 222 cannot
The active force of return plate 230 or piston shoes 240 is enough carried, as described above.Therefore, it is necessary to the arc angles and force-bearing surfaces in end
Seek a balance well between 222 area so that end can either more reduce stress and deformation, force-bearing surfaces
222 can carry larger active force again.Experiment is found, arc angle α, β is preferably kept to 4 °~8 ° of range
It is interior.
Table 1
Although Fig. 1-3 shows 2 roughly the same end surfaces 224,226 to lower recess, it should be appreciated that, limit
The parameters for determining end surface 224,226 are not necessarily the same, i.e., between end surface 224,226 and force-bearing surfaces 222
Difference in height Δ H, length, arc angle α, β can be different as needed.
The qualification test of breakdown test is recycled it can be found that the end by such as high pressure breakdown test, high-low pressure
Surface 224,226 can significantly lower the maximum stress in the end of second part 220.Compared with conventional retainer, root
The maximum stress that 45% or more can be reduced according to the retainer 200 of the embodiment of the present invention contributes to hydraulic pump or motor more
It works under high rotating speed or operating pressure, will not cracking when bearing larger stress, it can be made to be applied to more harsh work
Make environment, expanded the application range of hydraulic pump or motor, have higher reliability and durability, to improve hydraulic pump or
The service life of motor reduces maintenance cost.
Although at least one exemplary embodiment has been presented in the foregoing written description, but it is to be understood that existing many
Change case.It is also acknowledged that exemplary embodiment is only example, and it is not intended to be limiting in any manner the model of the present invention
It encloses, applicability or construction.But foregoing description will provide convenience for executing exemplary work for those skilled in the art
Route map.It should be understood that in the case of the scope of the present invention that no disengaging appended claims illustrate, it can be to exemplary
Embodiment carries out various changes.
Claims (8)
1. a kind of retainer (200) being used for hydraulic pump or motor, it is characterised in that：The retainer has working surface, institute
Stating working surface includes：
Force-bearing surfaces (222), what the force-bearing surfaces (222) were used to bear to be applied in play by the component of hydraulic pump or motor
Active force；With
End surface (224,226), the end surface (224,226) are recessed relative to the force-bearing surfaces (222).
2. retainer (200) according to claim 1, it is characterised in that：The working surface includes being located at the stress
Two end surfaces (224,226) of the two opposite sides on surface (222).
3. retainer (200) according to claim 1 or 2, it is characterised in that：The end surface includes relative to described
Inclined inclined-plane (the S of force-bearing surfaces (222)3), be parallel to the parallel surface (S of the force-bearing surfaces (222)1) and curved surface (S2) in
One kind or combinations thereof.
4. retainer (200) according to claim 3, it is characterised in that：At least one long side of the working surface has
There are arcuate shape, the end surface (224,226) that there is the arc angle (α, β) in the range of 4 °~8 °.
5. the retainer (200) according to any one of claim 1-2 and 4, it is characterised in that：In force-bearing surfaces
(222) between the minimum point of end surface (224,226) there are difference in height (Δ H), the difference in height (Δ H) 0.05mm~
In the range of 0.5mm.
6. the retainer (200) according to any one of claim 1-2 and 4, it is characterised in that：The retainer has
First part (210) and second part (220), the first part have the first surface relative to working surface protrusion
(212), the working surface is located on the second part (220).
7. retainer (200) according to claim 6, it is characterised in that：The first part (210) has and described the
The curved surfaces (214) that the working surface of one surface (212) and the second part (220) combines, the curved surfaces
(214) there is the center of curvature identical with the arcuate shape of the working surface.
8. a kind of hydraulic pump or motor, it is characterised in that：The hydraulic pump or motor include described in any one of claim 1-7
Retainer (200).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720160612 | 2017-02-22 | ||
| CN2017201606126 | 2017-02-22 | ||
| CN201720808056 | 2017-07-05 | ||
| CN2017208080569 | 2017-07-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108457851A true CN108457851A (en) | 2018-08-28 |
| CN108457851B CN108457851B (en) | 2020-10-02 |
Family
ID=63220428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711029750.1A Active CN108457851B (en) | 2017-02-22 | 2017-10-27 | Retainer and hydraulic pump or motor including the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108457851B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004108423A (en) * | 2002-09-17 | 2004-04-08 | Ntn Corp | Swinging bearing |
| JP2004225653A (en) * | 2003-01-24 | 2004-08-12 | Toyota Industries Corp | Piston type pump |
| CN103697066A (en) * | 2012-09-27 | 2014-04-02 | 谢夫勒科技股份两合公司 | Sheet cage used for rolling bearing |
| CN104302935A (en) * | 2013-04-16 | 2015-01-21 | 日本精工株式会社 | Angular ball bearing cage |
| CN205714623U (en) * | 2016-04-20 | 2016-11-23 | 宁波明和力盛液压科技有限公司 | A kind of plunger displacement pump of band clamp |
| US20170030406A1 (en) * | 2014-04-29 | 2017-02-02 | Delaval Holding Ab | Roller of a support arrangement for a rotary milking platform |
-
2017
- 2017-10-27 CN CN201711029750.1A patent/CN108457851B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004108423A (en) * | 2002-09-17 | 2004-04-08 | Ntn Corp | Swinging bearing |
| JP2004225653A (en) * | 2003-01-24 | 2004-08-12 | Toyota Industries Corp | Piston type pump |
| CN103697066A (en) * | 2012-09-27 | 2014-04-02 | 谢夫勒科技股份两合公司 | Sheet cage used for rolling bearing |
| CN104302935A (en) * | 2013-04-16 | 2015-01-21 | 日本精工株式会社 | Angular ball bearing cage |
| US20170030406A1 (en) * | 2014-04-29 | 2017-02-02 | Delaval Holding Ab | Roller of a support arrangement for a rotary milking platform |
| CN205714623U (en) * | 2016-04-20 | 2016-11-23 | 宁波明和力盛液压科技有限公司 | A kind of plunger displacement pump of band clamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108457851B (en) | 2020-10-02 |
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