CN102338024A - Inner curve radial plunger-type hydraulic motor - Google Patents
Inner curve radial plunger-type hydraulic motor Download PDFInfo
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- CN102338024A CN102338024A CN2011102550676A CN201110255067A CN102338024A CN 102338024 A CN102338024 A CN 102338024A CN 2011102550676 A CN2011102550676 A CN 2011102550676A CN 201110255067 A CN201110255067 A CN 201110255067A CN 102338024 A CN102338024 A CN 102338024A
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- plunger
- roller
- inner curve
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Abstract
The invention discloses an inner curve radial plunger-type hydraulic motor, which comprises a rotor, a plunger hole, a plunger, a roller and a stator, wherein the plunger hole is arranged on the rotor, the plunger is connected with the plunger hole in a sliding way, the roller is matched with the upper end surface of the plunger in a sliding way and is contacted with an inner curve curved surface of the stator, the roller can rotate along an axis of the roller, the roller is a drum roller, the inner curve curved surface of the stator is an inner cure curved surface which is matched with the shape of an outer circumferential surface of the drum roller, and the upper end surface of the plunger is a curved surface which is matched with the drum roller; and the cross section of the plunger is a rectangular shape, corners of the rectangular cross section are arc transition, and the cross section of the plunger hole is a rectangular shape which is matched with the rectangular cross section of the plunger. Under the situation that other auxiliary components are not increased, the roller can be effectively prevented from moving along the axis of the roller, the hydraulic motor is simple to assemble, the strength of the plunger is improved, and the service life of the motor can be prolonged.
Description
Technical field
The invention belongs to the hydraulic machinery field, specifically relate to a kind of inner curve radial plunger type hydraulic pump/motor.
Background technique
Inner curve radial plunger type hydraulic pump/motor generally all adopts cylindrical roller; Because the factors such as speed fluctuation of machining error and motor running can make oil hydraulic motor roller in running move along self axis; Roller moves the wearing and tearing that not only increase roller self, the plunger that cooperates with roller and stator contact segment along self axis, and makes the motor operations bad stability.In order to limit roller along the moving of self axis, traditional method is to install guide plate or circlip additional at the two ends of roller.Move along self axis for preventing roller like a kind of inner curve radial plunger type hydraulic pump/motor of existing technology; Guide plate is installed at two ends at roller; And this guide plate and rotor be made of one; Guide plate is stiff, and this structure need all will be installed guide plate in epitrochanterian each plunger hole, so the assembling difficulty; And for example the inner curve radial plunger type hydraulic pump/motor of another kind of existing technology moves along self axis for preventing roller; Two all-in-one-piece circlips on the card in the groove of the both ends of the surface of rotor; Though this method also can effectively limit roller and move along self axis; But will on rotor, slot, increase the processing of secondary baffle, its assembling is also cumbersome.
Also have when inner curve radial plunger type hydraulic pump/motor is used for some walking engineering machinery; When particularly using as wheel motor; Because the restriction of wheel diameter, stator size is radially limited by strictness, so therefore the diameter of the cylindrical plunger of existing technology also receives strict restriction; Plunger is passed to cylindrical roller with thrust; Because the outer peripheral surface of cylindrical roller cooperates with the upper-end surface of plunger, the axial dimension of described roller also is restricted, and the inner curve guide rail of roller and stator also is restricted at the contact width that Roller Shaft makes progress.In theory roller and stator all are regarded as rigid body; Described roller contacts with the inner curve guide rail of stator and is the line contact; In fact under the thrust that high-pressure and hydraulic oil produces, resiliently deformable takes place in contacting part branch, the contact of formation face; Cause plunger and stator inner curve curved surface and roller contact segment insufficient strength and heavy wear and fracture take place, this is the one of the main reasons that causes engineering accident to take place.
Summary of the invention
The technical problem that the present invention will solve is, provides a kind of roller that under the situation that does not increase other auxiliary components, also can effectively prevent to move and assemble simple and increase the intensity of plunger, the inner curve radial plunger type hydraulic pump/motor that prolongs the working life of motor along self axis.
Technical solution of the present invention is; A kind of inner curve radial plunger type hydraulic pump/motor with following structure is provided, comprises rotor, plunger hole, plunger, roller, stator, described plunger hole is arranged on the rotor; Described plunger slidably is connected with plunger hole; Described roller is slidingly matched with the plunger upper-end surface and contacts with the inner curve curved surface of stator, can be around roller self rotational, and described roller is a barrel shaped roller; The inner curve curved surface of the inner curve curved surface of described stator for matching with the outer peripheral surface shape of barrel shaped roller, the curved surface of the upper-end surface of described plunger for matching with barrel shaped roller; The shape of cross section of described plunger is a rectangle, and the corner of described rectangular cross-section is arc transition, the rectangle of the cross section of described plunger hole for matching with the plunger rectangular cross-section.
After adopting above structure, inner curve radial plunger type hydraulic pump/motor of the present invention compared with prior art has the following advantages:
Because the roller that inner curve radial plunger type hydraulic pump/motor of the present invention adopts is a kind of barrel shaped roller with cydariform outer peripheral surface; The inner curve curved guide of the inner curve curved guide of described stator for matching with the cydariform outer peripheral surface shape of barrel shaped roller; The curved surface of the upper-end surface of described plunger for matching with barrel shaped roller; Described barrel shaped roller rolls on curved guide; Can highly effectively prevent also that under the situation that does not increase other auxiliary components roller from moving along self axis; And increased the area of contact of the cydariform inner curve curved guide of roller and stator, and reduce the contact stress of roller when work, motor operations stability is improved greatly; And do not increase other auxiliary components, number of spare parts is few, and assembling is simple.Described motor also adopts a kind of rectangular cross-section plunger; Described rectangular cross-section plunger increases the size of plunger at stator shaft orientation under the situation that the stator radial dimension is restricted, therefore the sectional area of plunger increases; Increased the intensity of plunger; Reduce the plastic deformation of plunger, also make under same oil liquid pressure, output torque increases; Plunger increases in the size of stator shaft orientation; Correspondingly can increase the axial dimension of roller; The corresponding increase of contact width that the inner curve curved guide of roller and stator makes progress in Roller Shaft, the plunger of rectangular cross-section cooperates barrel shaped roller, and the area of contact of the inner curve curved guide of plunger and roller, roller and stator is all increased; Under identical oil liquid pressure effect; The contact stress of surface of contact when having reduced work has reduced the wearing and tearing of plunger, roller, stator inner curve curved guide, prolongs the working life of motor.
Description of drawings
Shown in Figure 1 is the structural representation of inner curve radial plunger type hydraulic pump/motor of the present invention.
It shown in Fig. 2 the zoomed-in view of roller among Fig. 1.
It shown in Fig. 3 the A-A view of Fig. 1.
It shown in Fig. 4 the B-B view of Fig. 1.
Shown in the figure: 1, front cover, 2, rolling bearing, 3, transmission shaft, 4, rotor, 5, plunger hole, 6, plunger, 7, roller, 8, stator, 9, cylinder body, 10, oil distributing shaft, 11, oil inlet passage, 12, drainback passage.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
See also Fig. 1, Fig. 2 and shown in Figure 3; Inner curve radial plunger type hydraulic pump/motor of the present invention comprises rotor 4, plunger hole 5, plunger 6, roller 7, stator 8, and described plunger hole 5 is arranged on the rotor 4; Described plunger 6 slidably is connected with plunger hole 5; Described roller 7 is slidingly matched with plunger 6 upper-end surfaces and contacts with the inner curve curved surface of stator 8, and can be around roller 7 self rotational, and described roller 7 is a barrel shaped roller; The inner curve curved surface of the inner curve curved surface of described stator 8 for matching with the outer peripheral surface shape of barrel shaped roller, the curved surface of the upper-end surface of described plunger 6 for matching with barrel shaped roller; The shape of cross section of described plunger 6 is a rectangle, and the corner of described rectangular cross-section is arc transition, the rectangle of the cross section of described plunger hole 5 for matching with plunger 6 rectangular cross-sections.
As depicted in figs. 1 and 2; The roller 7 of inner curve radial plunger type hydraulic pump/motor of the present invention is a kind of barrel shaped roller with cydariform outer peripheral surface; The inner curve curved guide of the inner curve curved guide of described stator 8 for matching with the cydariform outer peripheral surface shape of barrel shaped roller; Described barrel shaped roller rolls on the inner curve curved guide, can highly effectively prevent also that under the situation that does not increase other auxiliary components roller 7 from moving along self axis, and has increased the area of contact of the cydariform inner curve curved guide of roller 7 and stator 8; Reduce the contact stress of roller 7 when work, motor operations stability is improved greatly; And do not increase other auxiliary components, number of spare parts is few, and assembling is simple.
Like Fig. 1 and shown in Figure 4, the shape of cross section of the plunger 6 of inner curve radial plunger type hydraulic pump/motor of the present invention is a rectangle, and described rectangular cross-section plunger 6 is under the situation that stator 8 radial dimensions are restricted; Increase plunger 6 in the axial size of stator 8; Therefore the sectional area of plunger 6 increases, and has increased the intensity of plunger 6, reduces the plastic deformation of plunger 6; Make also that under same oil liquid pressure output torque increases; Plunger 6 increases in stator 8 axial sizes; Correspondingly can increase the axial dimension of roller 7; The inner curve curved guide of roller 7 and stator 8 is in the contact width corresponding increase of roller 7 on axially, and the plunger 6 of rectangular cross-section cooperates barrel shaped rollers 7, and the plunger 6 and the area of contact of the inner curve curved guide of roller 7, roller 7 and stator 8 are all increased; Under identical oil liquid pressure effect; The contact stress of surface of contact when having reduced work has reduced the wearing and tearing of plunger 6, roller 7, stator 8 inner curve curved guides, prolongs the working life of motor.
As shown in figures 1 and 3; Inner curve radial plunger type hydraulic pump/motor of the present invention also comprises front cover 1, rolling bearing 2, transmission shaft 3, cylinder body 9 and pintle 10, and described front cover 1, stator 8 and cylinder body 9 form the inner chamber of whole motor, are provided with pintle 10 and the transmission shaft 3 that rolling bearing 2 is installed in the described inner chamber; Also be provided with thrust plate on the described rotor 4; Described rotor 4 and transmission shaft 3 are connected through spline, and described pintle 10 and rotor 4 are connected through key, and described cylinder body 9 is provided with oil inlet passage 12 and drainback passage 13; Described pintle 10 is provided with the runner that supplies hydraulic oil to pass through; Oil inlet passage 12 in the described cylinder body 9 is linked up with the runner of pintle 10 respectively with drainback passage 13, and the runner of pintle 10 is communicated with the thrust plate of rotor 4 again, and described thrust plate is communicated with the hydraulic fluid port of plunger hole 5; Be existing technology, no longer launch to set forth here.
During motor operations, hydraulic oil gets into the runner of pintles 10 from the filler opening of cylinder body 9 through oil inlet passage 12, then through the thrust plate of rotor 4 and the hydraulic fluid port entering plunger hole 5 of plunger hole 5; Under the pressure effect of high-pressure and hydraulic oil; Promote plunger 68 directions slip along plunger hole 5 towards stator, plunger 6 is passed to barrel shaped roller 7 with thrust, and roller 7 contacts with the curved guide of stator 8 and produced the component that rotates; Thereby promoting rotor 4 rotates; Described rotor 4 and transmission shaft 3 are connected through spline, and transmission shaft 3 rotates synchronously, outwards output torque.In the present embodiment, under the situation that does not increase other auxiliary components, rely on engagement limits roller the moving of inner curve curved surface of upper-end surface, barrel shaped roller 7 and the stator 8 of plunger 6 in the entire work process along self axis; Increased the area of contact of roller 7 and stator 8; Can reduce contact stress, the oil hydraulic motor working stability improved, and do not increase other auxiliary components; Number of spare parts is few, and assembling is simple; Also adopt a kind of rectangular cross-section plunger 6, described plunger 6 increases the size of plunger 6 at stator shaft orientation under the situation that the stator radial dimension is restricted; Therefore the sectional area of plunger 6 increases; Increased the intensity of plunger 6, correspondingly can increase the axial dimension of roller 7, the inner curve curved guide of roller 7 and stator 8 is in the contact width corresponding increase of roller 7 on axially; Described barrel shaped roller 7 is used with rectangular cross-section plunger 6; The contact stress of surface of contact when greatly reducing work has reduced the wearing and tearing of plunger 6, roller 7, stator 8 inner curve curved guides, prolongs the working life of motor.
Claims (1)
1. inner curve radial plunger type hydraulic pump/motor; Comprise rotor (4), plunger hole (5), plunger (6), roller (7), stator (8); Described plunger hole (5) is arranged on the rotor (4); Described plunger (6) slidably is connected with plunger hole (5); Described roller (7) is slidingly matched with plunger (6) upper-end surface and contacts with the inner curve curved surface of stator (8), can be around roller (7) self rotational, and it is characterized in that: described roller (7) is a barrel shaped roller; The inner curve curved surface of the inner curve curved surface of described stator (8) for matching with the outer peripheral surface shape of barrel shaped roller, the curved surface of the upper-end surface of described plunger (6) for matching with barrel shaped roller; The shape of cross section of described plunger (6) is a rectangle, and the corner of described rectangular cross-section is arc transition, the rectangle of the cross section of described plunger hole (5) for matching with plunger (6) rectangular cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110255067.6A CN102338024B (en) | 2011-08-31 | 2011-08-31 | Inner curve radial plunger-type hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110255067.6A CN102338024B (en) | 2011-08-31 | 2011-08-31 | Inner curve radial plunger-type hydraulic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102338024A true CN102338024A (en) | 2012-02-01 |
| CN102338024B CN102338024B (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110255067.6A Expired - Fee Related CN102338024B (en) | 2011-08-31 | 2011-08-31 | Inner curve radial plunger-type hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102338024B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966534A (en) * | 2012-11-08 | 2013-03-13 | 上海电气液压气动有限公司 | Hydraulic pump/motor back cover |
| CN103114963A (en) * | 2013-01-04 | 2013-05-22 | 湖州师范学院 | Low-speed and high-torque hydraulic motor |
| CN105889008A (en) * | 2014-10-24 | 2016-08-24 | 北京中和天万泵业有限责任公司 | Inner curved plane cam rolling bearing radial plunger pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141269A (en) * | 1980-03-31 | 1981-11-04 | Mitsuo Enomoto | Winding tool for hose |
| CN2353937Y (en) * | 1998-06-12 | 1999-12-15 | 燕山大学 | Plunger-type roller pump |
| CN201902286U (en) * | 2010-12-21 | 2011-07-20 | 宁波市恒通液压科技有限公司 | Inner curve multiple-acting radial plunger type hydraulic centrifugal motor |
| CN202194771U (en) * | 2011-08-31 | 2012-04-18 | 浙江大学宁波理工学院 | Inner curve radial plunger hydraulic motor |
-
2011
- 2011-08-31 CN CN201110255067.6A patent/CN102338024B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141269A (en) * | 1980-03-31 | 1981-11-04 | Mitsuo Enomoto | Winding tool for hose |
| CN2353937Y (en) * | 1998-06-12 | 1999-12-15 | 燕山大学 | Plunger-type roller pump |
| CN201902286U (en) * | 2010-12-21 | 2011-07-20 | 宁波市恒通液压科技有限公司 | Inner curve multiple-acting radial plunger type hydraulic centrifugal motor |
| CN202194771U (en) * | 2011-08-31 | 2012-04-18 | 浙江大学宁波理工学院 | Inner curve radial plunger hydraulic motor |
Non-Patent Citations (1)
| Title |
|---|
| 程海林: "径向柱塞式液压马达等接触应力内曲线的研究", 《中国优秀博硕士学位论文全文数据库》, no. 3, 15 September 2004 (2004-09-15) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966534A (en) * | 2012-11-08 | 2013-03-13 | 上海电气液压气动有限公司 | Hydraulic pump/motor back cover |
| CN103114963A (en) * | 2013-01-04 | 2013-05-22 | 湖州师范学院 | Low-speed and high-torque hydraulic motor |
| CN105889008A (en) * | 2014-10-24 | 2016-08-24 | 北京中和天万泵业有限责任公司 | Inner curved plane cam rolling bearing radial plunger pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102338024B (en) | 2014-04-16 |
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Granted publication date: 20140416 Termination date: 20150831 |
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| EXPY | Termination of patent right or utility model |