Hydraulic motor with self-adaptive sealing mechanism

Abstract

The invention relates to the technical field of cycloid hydraulic motor oil seals, in particular to a hydraulic motor with a self-adaptive sealing mechanism, which comprises a hydraulic motor body, and the hydraulic motor body sequentially comprises an external main output shaft, a lateral shaft cover, an external shell, a rotor and stator pair, a middle flow distribution support disc, a right flow distribution disc and a flow distribution pressure disc from left to right. According to the hydraulic motor with the self-adaptive sealing mechanism, the annular sealing pieces are elastically assembled in the annular adjusting grooves in the two sides of the rotor section of the rotor and stator pair, the internal and external compression size is automatically adjusted through the change of the internal pressure, and therefore automatic adaptation is achieved, the assembling sealing performance is improved, and the transmission efficiency is improved; the double-layer communication type embedded sealing groove with the communication type structure design is adopted, the mode that one side is elastically compressed, and the other side is hydraulically compressed is adopted, the internal pressure can be adjusted through inner side elastic compression, and therefore extrusion deformation is conducted on an outer side sealing piece, and the sealing effect of the outer side is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cycloid hydraulic motor oil seals, in particular to a hydraulic motor with a self-adaptive sealing mechanism. Background Art

[0002] The traditional cycloid hydraulic motor is a fixed displacement motor with a wide range of uses, mainly used in the rotary mechanism of various machinery such as agriculture, fishery, light industry, lifting and transportation, mining, engineering machinery, etc. In order to meet the requirements of various equipment working conditions, it is necessary to set corresponding displacements for different motors. However, the internal oil pressure of the cycloid motor will change under the influence of different speeds. The sealing mechanism on the traditional assembly surface cannot be adjusted according to the change in internal pressure, resulting in limited sealing of the hydraulic motor, which is prone to oil seepage or leakage, seriously affecting the service life and driving efficiency of the hydraulic motor. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the sealing mechanism on the assembly surface of the traditional hydraulic motor cannot be adjusted according to the change of internal pressure, resulting in limited sealing of the hydraulic motor, which is prone to oil seepage or leakage, seriously affecting the service life and driving efficiency of the hydraulic motor.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a hydraulic motor with a self-adaptive sealing mechanism, including a hydraulic motor body, wherein the hydraulic motor body includes, from left to right, an external main output shaft, a lateral shaft cover, an external shell, a rotor-stator pair, a central distribution support plate, a right distribution plate and a distribution pressure plate, an internal transmission chamber for installing the external main output shaft is opened at the lateral shaft cover assembly end inside the external shell, a lateral bearing is sleeved on the outside of the external main output shaft and located inside the internal transmission chamber, a two-section linkage shaft is movably assembled inside the external main output shaft, the rotor-stator pair, the central distribution support plate and the right distribution plate, annular adjustment grooves are symmetrically opened on both sides of the rotor segment of the rotor-stator pair, and annular seals are elastically assembled inside the annular adjustment grooves.

[0005] The outer shell body located on the rotor-stator sub-assembly surface, the central distribution support plate located on the rotor-stator sub-assembly surface and the distribution pressure plate located on the central distribution support plate assembly surface are all provided with double-layer connected embedded sealing grooves, the inner opening ends of the double-layer connected embedded sealing grooves are provided with compressible elastic sealing rings, and the outer opening ends of the double-layer connected embedded sealing grooves are provided with outer sealing rings. The double-layer connected embedded sealing grooves include an inner sealing groove, an outer sealing groove, a compression groove provided inside the inner sealing groove and a built-in guide groove for connecting the outer sealing groove and the compression groove, which are provided on the outer shell body located on the rotor-stator sub-assembly surface, the central distribution support plate located on the rotor-stator sub-assembly surface and the distribution pressure plate located on the central distribution support plate assembly surface.

[0006] The compressible elastic sealing ring comprises an inner sealing ring inserted in the inner sealing groove and a wave spring installed in the compression groove.

[0007] The interior of the built-in guide groove is filled with linkage hydraulic oil.

[0008] The outer side of the stator segment of the rotor-stator pair is provided with an annular assembly cover.

[0009] The outer sealing groove is arranged on the inner assembly surface of the annular sealing cover.

[0010] The two-section linkage shaft comprises a first linkage shaft drivingly connecting the external main output shaft with the rotor-stator auxiliary rotor section and a second linkage shaft drivingly connecting the rotor-stator auxiliary rotor section with the right-placed distributor.

[0011] An inner extrusion head is elastically assembled on the right inner wall of the distribution pressure plate with bolts, and the left side of the inner extrusion head extrudes the right distribution plate and is slidably assembled with the right side of the right distribution plate.

[0012] An upper opening inlet hole and an upper opening return hole for controlling the rotation of the right-placed distribution plate are provided inside the distribution pressure plate.

[0013] The annular seal comprises a rotor wave spring installed inside the annular adjustment groove and an external sealing ring located outside the rotor wave spring.

[0014] The beneficial effects of the present invention are:

[0015] (1) A hydraulic motor with a self-adaptive sealing mechanism of the present invention is provided with an annular seal elastically mounted inside the annular adjustment groove 17 on both sides of the rotor segment of the stator pair, and the internal and external compression sizes are automatically adjusted by the change of the internal pressure, thereby automatically adapting, improving the assembly sealing and the transmission efficiency;

[0016] (2) A double-layer interconnected embedded sealing groove adopts a interconnected structure design, which adopts elastic compression on one side and hydraulic compression on the other side. The internal pressure can be adjusted by elastic compression on the inner side, thereby squeezing and deforming the outer seal to improve the sealing effect on the outer side;

[0017] (3) The groove design of the assembly surface facilitates processing, production and assembly;

[0018] (4) The sealing mechanism of the entire device can be automatically adjusted according to the internal rotation speed and can also be elastically reset, which greatly enhances the operability and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the double-layer interconnected embedded sealing groove structure of the stator sub-position of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of a double-layer interconnected embedded sealing groove at the distribution pressure plate position in the present invention. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Figure 1 , Figure 2 and Figure 3 A hydraulic motor with a self-adaptive sealing mechanism is shown, comprising a hydraulic motor body, which comprises, from left to right, an external main output shaft 1, a lateral shaft cover 2, an external housing 3, a rotor-stator pair 4, a central distribution support plate 5, a right distribution plate 6 and a distribution pressure plate 7. An internal transmission chamber for mounting the external main output shaft 1 is provided at the assembly end of the lateral shaft cover 2 inside the external housing 3. A lateral bearing 8 is sleeved on the outside of the external main output shaft 1 inside the internal transmission chamber. A two-section linkage shaft 9 is movably assembled inside the external main output shaft 1, the rotor-stator pair 4, the central distribution support plate 5 and the right distribution plate 6. Annular adjustment grooves 17 are symmetrically provided on both sides of the rotor segment of the rotor-stator pair 4, and an annular seal 18 is elastically assembled inside the annular adjustment groove 17.

[0026] When the pressure is high, the annular seal 18 is pressed in, and the gap on both sides of the rotor becomes larger and is not easy to get stuck; when the pressure is low, the annular seal 18 fits tightly against the gap, improving efficiency.

[0027] Double-layer interconnected embedded sealing grooves 10 are provided on the outer shell 3 located on the assembly surface of the rotor-stator pair 4, the central distribution support plate 5 is located on the assembly surface of the rotor-stator pair 4, and the distribution pressure plate 7 is located on the assembly surface of the central distribution support plate 5. The inner opening ends of the double-layer interconnected embedded sealing grooves 10 are provided with compressible elastic sealing rings 11, and the outer opening ends of the double-layer interconnected embedded sealing grooves 10 are provided with outer sealing rings 12.

[0028] The outer shell 3 is located on the assembly surface of the rotor-stator pair 4, and the central distribution support plate 5 is located on the assembly surface of the rotor-stator pair 4. The double-layer connected embedded sealing groove 10 is an L-shaped structure, and the distribution pressure plate 7 is located on the assembly surface of the central distribution support plate 5. Both have a double-layer connected embedded sealing groove 10 with a horizontal U-shaped structure design.

[0029] In order to cooperate with assembly and connection, the double-layer connected embedded sealing groove 10 includes an inner sealing groove 101, an outer sealing groove 102, a compression groove 103 opened inside the inner sealing groove 101 and a built-in guide groove 104 for connecting the outer sealing groove 102 and the compression groove 103.

[0030] The inner sealing groove 101 and the outer sealing groove 102 are both annular sealing grooves.

[0031] The relative positions of the inner sealing groove 101 , the outer sealing groove 102 and the built-in guide groove 104 can be adapted and adjusted according to the different structures of the external shell 3 , the central distribution support plate 5 and the distribution pressure plate 7 .

[0032] In order to cooperate with elastic adjustment, the compressible elastic sealing ring 11 includes an inner sealing ring 111 inserted into the inner sealing groove 101 and a wave spring 112 installed in the compression groove 103 .

[0033] In order to cooperate with the internal extrusion, the internal guide groove 104 is filled with linkage hydraulic oil.

[0034] In order to improve the outer side assembly stability and sealing performance, the outer side of the stator segment of the rotor-stator pair 4 is provided with an annular assembly cover 13 .

[0035] In order to cooperate with external sealing and assembly, the outer sealing groove 102 is opened on the inner assembly surface of the annular sealing cover 13.

[0036] By arranging the outer sealing groove 102 inside the annular sealing cover 13, on the one hand, the longitudinal shock absorption and transverse sealing properties can be improved, and on the other hand, the pressure on the assembly bolts can be reduced in cooperation with the annular sealing cover 13.

[0037] For two-stage synchronous drive, the two-stage linkage shaft 9 includes a first linkage shaft 91 for transmission connection between the external main output shaft 1 and the rotor segment of the stator pair 4 and a second linkage shaft 92 for transmission connection between the rotor segment of the stator pair 4 and the right-placed distribution plate 6.

[0038] In order to improve the inner assembly extrusion force and shock absorption, an inner extrusion head 14 is elastically assembled with bolts on the right inner wall of the distribution pressure plate 7. The left side of the inner extrusion head 14 squeezes the right distribution plate 6 and slides with the right side of the right distribution plate 6.

[0039] A telescopic blind hole is opened on the right inner wall of the distribution pressure plate 7, and then the telescopic section of the inner extrusion head 14 is inserted into the telescopic blind hole. Then, an extrusion spring piece is arranged on the contact surface between the inner extrusion head 14 and the right inner wall of the distribution pressure plate 7 to control the inner extrusion head 14 to extrude the right distribution plate 6 to the left.

[0040] In order to coordinate external liquid supply and reflux, an upper opening inlet hole 15 and an upper opening reflux hole 16 for controlling the rotation of the right-placed distribution plate 6 are provided inside the distribution pressure plate 7.

[0041] The upper opening inlet hole 15 and the upper opening return hole 16 are switched to control the forward and reverse rotation of the motor.

[0042] The external hydraulic oil is introduced into the hydraulic motor through the upper opening inlet hole 15, driving the right-placed distribution plate 6 to rotate, and then the right-placed distribution plate 6 drives the second linkage shaft 92 to rotate, and then the second linkage shaft 92 controls the rotor section of the stator pair 4 to rotate, and then the rotor section of the stator pair 4 controls the first linkage shaft 91 to rotate, and then the first linkage shaft 91 controls the external main output shaft 1 to rotate.

[0043] In order to cooperate with the installation limit, the external main output shaft 1 is installed and limited with the external housing 3 through the lateral shaft cover 2.

[0044] The annular seal 18 includes a rotor wave spring installed inside the annular adjustment groove 17 and an external sealing ring located outside the rotor wave spring.

[0045] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hydraulic motor with a self-adaptive sealing mechanism, comprising a hydraulic motor body, characterized in that: The hydraulic motor body comprises, from left to right, an external main output shaft (1), a lateral shaft cover (2), an external housing (3), a rotor-stator pair (4), a central distribution support plate (5), a right distribution plate (6) and a distribution pressure plate (7); an internal transmission chamber for mounting the external main output shaft (1) is provided at the assembly end of the lateral shaft cover (2) inside the external housing (3); a lateral bearing (8) is sleeved inside the internal transmission chamber outside the external main output shaft (1); a two-stage linkage shaft (9) is movably provided inside the external main output shaft (1), the rotor-stator pair (4), the central distribution support plate (5) and the right distribution plate (6); an annular adjustment groove (17) is symmetrically provided on both sides of the rotor segment of the rotor-stator pair (4); an annular seal (18) is elastically provided inside the annular adjustment groove (17).

2. A hydraulic motor with a self-adaptive sealing mechanism according to claim 1, characterized in that: The outer shell (3) is located on the assembly surface of the rotor-stator pair (4), the central distribution support plate (5) is located on the assembly surface of the rotor-stator pair (4), and the distribution pressure plate (7) is located on the assembly surface of the central distribution support plate (5) and is provided with a double-layer interconnected embedded sealing groove (10). The inner opening end of the double-layer interconnected embedded sealing groove (10) is provided with a compressible elastic sealing ring (11), and the outer opening end of the double-layer interconnected embedded sealing groove (10) is provided with an outer sealing ring (12). The connected embedded sealing groove (10) comprises an inner sealing groove (101) provided on an outer shell (3) and located on a rotor-stator pair (4) assembly surface, a central distribution support plate (5) provided on a rotor-stator pair (4) assembly surface, and a distribution pressure plate (7) provided on a central distribution support plate (5) assembly surface, an outer sealing groove (102), a compression groove (103) provided inside the inner sealing groove (101), and a built-in guide groove (104) for connecting the outer sealing groove (102) and the compression groove (103).

3. A hydraulic motor with a self-adaptive sealing mechanism according to claim 2, characterized in that: The compressible elastic sealing ring (11) comprises an inner sealing ring (111) inserted into the inner sealing groove (101) and a wave spring (112) installed inside the compression groove (103).

4. A hydraulic motor with a self-adaptive sealing mechanism according to claim 2, characterized in that: The built-in guide groove (104) is filled with linkage hydraulic oil.

5. A hydraulic motor with a self-adaptive sealing mechanism according to claim 1, characterized in that: The outer side of the stator segment of the rotor-stator pair (4) is provided with an annular assembly cover (13).

6. A hydraulic motor with a self-adaptive sealing mechanism according to claim 5, characterized in that: The outer sealing groove (102) is provided on the inner assembly surface of the annular sealing cover (13).

7. A hydraulic motor with a self-adaptive sealing mechanism according to claim 1, characterized in that: The two-section linkage shaft (9) comprises a first linkage shaft (91) for transmission connection between the external main output shaft (1) and the rotor section of the rotor-stator pair (4), and a second linkage shaft (92) for transmission connection between the rotor section of the rotor-stator pair (4) and the right-placed valve plate (6).

8. A hydraulic motor with a self-adaptive sealing mechanism according to claim 1, characterized in that: An inner extrusion head (14) is elastically assembled and bolted on the right inner wall of the distribution pressure plate (7). The inner extrusion head (14) extrudes the right distribution plate (6) on the left side and is slidably assembled with the right side of the right distribution plate (6).

9. A hydraulic motor with a self-adaptive sealing mechanism according to claim 1, characterized in that: The distribution pressure plate (7) is provided with an upper opening inlet hole (15) and an upper opening return hole (16) for controlling the rotation of the right distribution plate (6).

10. A hydraulic motor with a self-adaptive sealing mechanism according to claim 1, characterized in that: The annular seal (18) comprises a rotor wave spring installed inside the annular adjustment groove (17) and an external sealing ring located outside the rotor wave spring.

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