CN107575378B - Adjustable inner curve hydraulic pump or motor - Google Patents
Adjustable inner curve hydraulic pump or motor Download PDFInfo
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- CN107575378B CN107575378B CN201710768278.7A CN201710768278A CN107575378B CN 107575378 B CN107575378 B CN 107575378B CN 201710768278 A CN201710768278 A CN 201710768278A CN 107575378 B CN107575378 B CN 107575378B
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- rotor
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- motor
- hydraulic pump
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- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005299 abrasion Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
The invention relates to an adjustable inner curve hydraulic pump or motor, which comprises a stator and a rotor which are coaxially connected and can rotate relatively, wherein the inner wall of the stator is formed by arranging a plurality of concave curved surfaces and a plurality of convex curved surfaces at intervals, the rotor is provided with a piston hole, and a piston assembly with one end part in contact with the inner wall of the stator and the other end part in the piston hole in a reciprocating manner along the axial direction of the piston hole is arranged in the piston hole. In the axial direction of perpendicular stator, the one end cross-section of the inner wall of stator is circular, and the other end cross-section is the wave of unsmooth fluctuation, and the inner wall is from its one end to its other end, and the wave unsmooth fluctuation degree of cross-section becomes progressively greater, has seted up a plurality of guide slots along the wave fluctuation on the inner wall, and the tip of piston assembly is located the guide slot, and this tip cooperatees with the shape of guide slot. In the plane where the axial lead of the piston hole and the axial lead of the rotor are intersected, the axial lead of the piston hole and the radial direction of the rotor form an included angle.
Description
Technical Field
The present invention relates to an inner curve hydraulic pump or motor, and more particularly to an adjustable inner curve hydraulic pump or motor.
Background
The inner curve hydraulic pump/motor has the advantages of small size, light weight, compact structure, radial force balance, small torque pulsation, large transmission torque, high starting efficiency, stable work at very low rotating speed and the like, and is widely applied to hydraulic systems such as windlass, heavy running machinery, mining machinery, marine anchor machines, cranes, tension systems of other manufacturing industries and the like. For working conditions requiring both driving (motor state) and continuous braking (pump state), such as noon lifting and falling of a winch and a crane, driving and braking of heavy machinery, a tension system and the like.
However, the prior art inner curve hydraulic pump/motor is not structurally adjustable, the curved surfaces of the inner wall of the stator are parallel to the axis of the stator, the stator and the rotor cannot move in the axial direction, and the output is constant under the condition of constant input no matter the motor working condition or the pump working condition. This has limited its application to a large extent. If the inner curve hydraulic pump/motor is designed to be of an adjustable structure, namely, the inner wall of the stator is designed to be inclined, the problems of aggravation of eccentric wear and the like tend to be caused, and the abrasion to the inner wall of the stator is also aggravated.
Disclosure of Invention
In order to solve the problems in the prior art, it is an object of the present invention to provide an adjustable inner curve hydraulic pump or motor.
In order to achieve the above object, the present invention provides an adjustable inner curve hydraulic pump or motor, comprising a stator and a rotor which are coaxially connected and relatively rotatable, wherein the inner wall of the stator is composed of a plurality of concave curved surfaces and a plurality of convex curved surfaces which are arranged at intervals, the rotor is provided with a piston hole, and a piston assembly is arranged in the piston hole, one end of the piston assembly is contacted with the inner wall of the stator, and the other end of the piston assembly reciprocates in the piston hole along the axial direction of the piston hole. In the axial direction of perpendicular stator, the one end cross-section of the inner wall of stator is circular, and the other end cross-section is the wave of unsmooth fluctuation, and the inner wall is from its one end to its other end, and the wave unsmooth fluctuation degree of cross-section becomes progressively greater, has seted up a plurality of guide slots along the wave fluctuation on the inner wall, and the tip of piston assembly is located the guide slot, and this tip cooperatees with the shape of guide slot. In the plane where the axial lead of the piston hole and the axial lead of the rotor are intersected, the axial lead of the piston hole and the radial direction of the rotor form an included angle.
Further, the included angle is in the interval of 0-50 degrees.
Further, the piston holes are distributed uniformly along the circumference of the rotor.
Further, in the axial direction of the rotor, the circumferential surface of the rotor gradually moves away from the axial line of the rotor from one end to the other end thereof.
Further, the plurality of guide grooves are arranged in order along a direction from one end to the other end of the inner wall.
Further, the cross section of the guide groove is arc-shaped.
Further, the concave curved surface gradually gets away from the axial line of the stator from one end of the inner wall to the other end.
Further, one end of the piston assembly has a steel ball capable of rolling along the guide groove.
Further, the piston assembly further includes a piston rod capable of reciprocating within the piston bore in an axial direction of the piston bore, and the steel ball is rollably connected to the other end of the piston rod opposite to the end where the piston bore is connected.
Due to the adoption of the technical scheme, the adjustable inner curve hydraulic pump or motor has the following advantages compared with the prior art:
1. the inner wall of the stator (namely the working surface of the stator) is designed to be inclined in the axial direction, and the stator is arranged to be capable of moving in the axial direction, so that a piston assembly on the rotor can move along different inner curves to change the piston stroke, thereby changing the output of the pump/motor, and the inner curve hydraulic pump or motor can also change the output through structural adjustment under the condition of unchanged input, thereby further widening the application range of the inner curve hydraulic pump or motor;
2. by designing the piston hole to be inclined, the piston assembly can reciprocate along an inclined route, so that the eccentric wear phenomenon can be effectively reduced;
3. by arranging the guide groove, point contact between one end part of the piston assembly and the inner wall of the stator in the prior art is changed into arc contact, so that the working is more stable, the bearing moment can be increased, and the abrasion is reduced;
4. the adjustable inner curve hydraulic pump or motor has the advantages of simple and compact structure, convenient use and operation and stable working condition.
Drawings
FIG. 1 is a schematic perspective view of an adjustable inner curve hydraulic pump or motor of the present invention;
FIG. 2 is a schematic perspective view of a rotor (with a piston assembly mounted) in an adjustable inner curve hydraulic pump or motor according to the present invention;
FIG. 3 is a schematic perspective view of a rotor (without piston assembly) in an adjustable inner curve hydraulic pump or motor according to the present invention;
FIG. 4 is a side cross-sectional view of a rotor (without a piston assembly) in an adjustable inner curve hydraulic pump or motor of the present invention;
FIG. 5 is a schematic perspective view of the stator of the adjustable inner curve hydraulic pump or motor from an angle;
FIG. 6 is a schematic perspective view of the stator of the adjustable inner curve hydraulic pump or motor of the present invention from another angle;
FIG. 7 is an axial view of a stator in an adjustable inner curve hydraulic pump or motor of the present invention;
fig. 8 is a side cross-sectional view of a stator in an adjustable inner curve hydraulic pump or motor of the present invention.
The reference numerals in the figures are:
1. a stator; 11. a concave curved surface; 12. a convex curved surface; 13. a guide groove;
2. a rotor; 21. a piston bore; 22. a circumferential surface;
3. a piston assembly; 31. a steel ball; 32. a piston post.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.
Referring to fig. 1 to 8, the adjustable inner curve hydraulic pump or motor of the present embodiment comprises a stator 1 and a rotor 2 which are coaxially connected and rotatable with respect to each other.
Referring to fig. 2 to 4, the rotor 2 has a piston hole 21, and in the plane where the axial lines of the piston hole 21 intersect with the axial line of the rotor 2, the axial line of the piston hole 21 forms an angle with the radial direction of the rotor 2, that is, an angle α shown in fig. 4, preferably, the angle is in the interval of 0 ° to 50 °. The piston holes 21 are plural and uniformly distributed along the circumferential direction of the rotor 2.
In a more preferred embodiment, the circumferential surface 22 of the rotor 2 is gradually distant from the axis of the rotor 2 from one end thereof to the other end thereof in the axial direction of the rotor 2. The piston holes 21 are formed in the circumferential surface 22. More preferably, the axial direction of the piston bore 21 is perpendicular to the circumferential surface 22.
A piston assembly 3 is provided in the piston hole 21, one end of which is in contact with the inner wall of the stator 1, and the other end of which reciprocates in the piston hole 21 in the axial direction of the piston hole 21. In the present embodiment, the piston assembly 3 includes a steel ball 31, a piston rod 32 capable of reciprocating in the piston hole 21 in the axial direction of the piston hole 21, and the steel ball 31 is rollably connected to the other end of the piston rod 32 opposite to the end where the piston hole 21 is connected. A spring is provided between the piston post 32 and the piston bore 21, and the spring 22 exerts a force on the piston assembly to cause the steel ball 31 at the end of the piston assembly to abut against the inner wall of the stator 1 during operation.
Referring to fig. 5 to 8, the inner wall of the stator 1 is composed of a plurality of concave curved surfaces 11 and a plurality of convex curved surfaces 12 spaced apart from each other. In a direction perpendicular to the axial direction of the stator 1, one end section of the inner wall of the stator 1 is circular (refer to fig. 5), the other end section is in a wavy shape with concave-convex relief (refer to fig. 6), and the degree of the wavy concave-convex relief of the section becomes gradually larger from one end to the other end of the inner wall. In this embodiment, the concave curved surface 11 of the inner wall of the stator 1 is inclined along the axial direction of the stator 1, the extending surface of the concave curved surface 11 intersects with the axial line of the stator 1, and the concave curved surface 11 gradually moves away from the axial line of the stator 1 from one end of the inner wall to the other end. The concave curved surface in this embodiment is defined as a curved surface that arches toward the outer wall of the stator, and the convex curved surface is a curved surface that arches toward the axis of the stator.
The inner wall of the stator 1 is provided with a plurality of guide grooves 13 which undulate along the undulation. One end of the piston assembly 3 is located in the guide groove 13, i.e. the steel ball 31 can roll along the guide groove 13.
The cross section of the guide groove 13 is arc-shaped. The plurality of guide grooves 13 are arranged in order along a direction from one end to the other end of the inner wall.
The working principle of the adjustable inner curve hydraulic pump or motor is as follows:
the steel balls 31 of the piston assembly 3 are attached to the concave-convex wavy inner wall of the stator 1 and roll in the guide groove 13, and are influenced by the concave-convex wavy surface, so that the piston assembly 3 reciprocates in the rotor 2 along the piston holes 21 which are obliquely arranged in the radial direction of the rotor 2. When the displacement is required to be changed, the rotor 2 and the stator 1 do axial movement, the wavy curved surface changes from large to small or from large to small in the axial direction, so that the reciprocating movement stroke of the piston assembly 3 in the rotor 2 changes from large to small or from large to small, and the displacement (rotating speed) of the hydraulic pump (motor) is changed.
The adjustable inner curve hydraulic pump or motor can change the output through structural adjustment under the condition of unchanged input, so that the application range of the inner curve hydraulic pump or motor is further widened; by designing the piston hole to be inclined, the piston assembly can reciprocate along an inclined route, so that the eccentric wear phenomenon can be effectively reduced; the point contact between one end part of the piston assembly and the inner wall of the stator in the prior art is changed into the surface contact through the arrangement of the guide groove, so that the working is more stable, and the abrasion is reduced; the adjustable inner curve hydraulic pump or motor has the advantages of simple and compact structure, convenient use and operation and stable working condition.
The present invention has been described in detail with reference to the embodiments, but it is to be understood that the invention is not limited to the embodiments, and equivalent changes and modifications are intended to be included in the scope of the present invention, since it is intended that the invention is interpreted by those skilled in the art to which the present invention pertains.
Claims (9)
1. An adjustable inner curve hydraulic pump or motor, it includes coaxial coupling and relative pivoted stator (1) and rotor (2), the inner wall of stator (1) is by a plurality of concave curved surface (11) and a plurality of protruding curved surface (12) interval setting each other and is constituteed, rotor (2) on have piston hole (21), the axial of piston hole (21) perpendicular to circumference (22) of rotor (2), piston hole (21) in be provided with one tip with the inner wall of stator (1) contacts and the other tip is in this piston hole (21) along piston hole (21) axial reciprocating motion's piston assembly (3), its characterized in that:
in a plane where the axial lead of the piston hole (21) and the axial lead of the rotor (2) are intersected, the axial lead of the piston hole (21) and the radial direction of the rotor (2) form an included angle,
in the axial direction along stator (1), the one end cross-section of the inner wall of stator (1) is circular, and the other end cross-section is the wave that unsmooth was fluctuated, just the inner wall is from its one end to its other end, and the wave unsmooth degree of fluctuation of cross-section grow gradually, a plurality of guide slots (13) that follow the wave and fluctuation have been seted up on the inner wall, one end of piston assembly (3) is located guide slot (13), and this one end cooperatees with the shape of guide slot (13).
2. The adjustable inner curve hydraulic pump or motor of claim 1, wherein: the included angle is within the range of 0-50 degrees.
3. The adjustable inner curve hydraulic pump or motor of claim 1, wherein: the piston holes (21) are a plurality of and uniformly distributed along the circumferential direction of the rotor (2).
4. The adjustable inner curve hydraulic pump or motor of claim 1, wherein: in the axial direction of the rotor (2), the circumferential surface (22) of the rotor (2) gradually moves away from the axial line of the rotor (2) from one end to the other end.
5. The adjustable inner curve hydraulic pump or motor of claim 1, wherein: the guide grooves (13) are arranged in sequence along the direction from one end to the other end of the inner wall.
6. The adjustable inner curve hydraulic pump or motor of claim 1, wherein: the cross section of the guide groove (13) is arc-shaped.
7. The adjustable inner curve hydraulic pump or motor of claim 1, wherein: the concave curved surface (11) is gradually far away from the axial lead of the stator (1) from one end of the inner wall to the other end.
8. The adjustable inner curve hydraulic pump or motor of claim 1 or 6, wherein: one end of the piston assembly (3) is provided with a steel ball (31) capable of rolling along the guide groove (13).
9. The adjustable inner curve hydraulic pump or motor of claim 8, wherein: the piston assembly (3) further comprises a piston column (32) capable of reciprocating in the piston hole (21) along the axial direction of the piston hole (21), and the steel ball (31) is connected to the other end of the piston column (32) opposite to the end connected with the piston hole (21) in a rolling way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710768278.7A CN107575378B (en) | 2017-08-31 | 2017-08-31 | Adjustable inner curve hydraulic pump or motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710768278.7A CN107575378B (en) | 2017-08-31 | 2017-08-31 | Adjustable inner curve hydraulic pump or motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107575378A CN107575378A (en) | 2018-01-12 |
| CN107575378B true CN107575378B (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710768278.7A Active CN107575378B (en) | 2017-08-31 | 2017-08-31 | Adjustable inner curve hydraulic pump or motor |
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| Country | Link |
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| CN (1) | CN107575378B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685854B (en) * | 2019-10-31 | 2021-06-18 | 济宁力源液压股份有限公司 | Hydraulic motor shell |
| CN112523985B (en) * | 2020-11-23 | 2022-12-20 | 常志 | Radial plunger pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1506762A (en) * | 1974-09-12 | 1978-04-12 | Bosch Gmbh Robert | Hydraulic rotary pumps or motors |
| US4104956A (en) * | 1969-06-10 | 1978-08-08 | Hitachi Construction Machinery Co., Ltd. | Radial piston type multi-stroke hydraulic pump or motor |
| CN103670900A (en) * | 2013-12-06 | 2014-03-26 | 宁波斯达弗液压传动有限公司 | Variable displacement hydraulic motor using asymmetric inner curve |
| CN203640997U (en) * | 2013-11-11 | 2014-06-11 | 南昌尊荣泵业有限公司 | Middle-pressure and high-pressure radial spherical head plunger pump |
| CN106286181A (en) * | 2016-10-10 | 2017-01-04 | 杨健 | A kind of hydraulic variable flow mechanism |
| CN207093369U (en) * | 2017-08-31 | 2018-03-13 | 常熟市海虞镇志宏五金厂 | Adjustable inner curve hydraulic pump or motor |
-
2017
- 2017-08-31 CN CN201710768278.7A patent/CN107575378B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104956A (en) * | 1969-06-10 | 1978-08-08 | Hitachi Construction Machinery Co., Ltd. | Radial piston type multi-stroke hydraulic pump or motor |
| GB1506762A (en) * | 1974-09-12 | 1978-04-12 | Bosch Gmbh Robert | Hydraulic rotary pumps or motors |
| CN203640997U (en) * | 2013-11-11 | 2014-06-11 | 南昌尊荣泵业有限公司 | Middle-pressure and high-pressure radial spherical head plunger pump |
| CN103670900A (en) * | 2013-12-06 | 2014-03-26 | 宁波斯达弗液压传动有限公司 | Variable displacement hydraulic motor using asymmetric inner curve |
| CN106286181A (en) * | 2016-10-10 | 2017-01-04 | 杨健 | A kind of hydraulic variable flow mechanism |
| CN207093369U (en) * | 2017-08-31 | 2018-03-13 | 常熟市海虞镇志宏五金厂 | Adjustable inner curve hydraulic pump or motor |
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| Publication number | Publication date |
|---|---|
| CN107575378A (en) | 2018-01-12 |
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