WO2023010392A1

WO2023010392A1 - Internally curved hydraulic motor capable of two-way oil distribution

Info

Publication number: WO2023010392A1
Application number: PCT/CN2021/110788
Authority: WO
Inventors: 张红娟; 赵崇碧; 胡品容; 师文广; 李成志; 潘祥; 应杰; 许一齐; 金鑫; 江庭杰; 高进
Original assignee: 宁波斯达弗液压传动有限公司
Priority date: 2021-08-02
Filing date: 2021-08-05
Publication date: 2023-02-09
Also published as: CN113623129A

Abstract

Disclosed is an internally curved hydraulic motor capable of two-way oil distribution, comprising two rotors fixed to each other, casings sleeved on the rotors, and an oil distribution cover connected between the two casings. The casings each comprises an output cover and a stator body; the output cover is fixed on the stator body; a curved guide rail is provided in the stator body; an even number of cylinder holes are evenly formed on each rotor along the circumferential direction; a radial plunger is provided in each cylinder hole; the top of each plunger is connected to a roller; and the outer peripheral surface of the roller is in contact with the inner curved surface of the curved guide rail. An oil distribution mechanism for distributing oil to the cylinder holes is provided between each rotor and the oil distribution cover, and the two oil distribution mechanisms are located on two sides of the oil distribution cover, respectively. The present invention has the advantage of achieving the two-way oil distribution in the middle of the motor, such that the motor structure is more compact, the flow distribution efficiency is higher, and the motor performance is more reliable.

Description

An inner curve hydraulic motor with two-way oil distribution

technical field

The invention relates to the technical field of hydraulic motors, in particular to an inner curve hydraulic motor with two-way oil distribution.

Background technique

With the application of integrated hydraulic technology in the hydraulic industry more and more widely, many manufacturers put forward higher requirements for inner curve hydraulic motors, hoping that the flow distribution efficiency, volumetric efficiency, reliability and service life of inner curve hydraulic motors can be further improved ;The power-to-weight ratio can be further improved, greatly reducing unnecessary size and weight, and can provide a variety of specifications and installation dimensions. The inner curve hydraulic motor can withstand higher pressure, output greater torque, and the weight per unit power can be lower. light. The existing inner curve motors with a displacement of more than 15000mL have a sharp increase in the axial and radial dimensions. It is difficult to meet the application requirements of injection molding machines and some construction machinery with high size requirements. Therefore, it is necessary to study an inner curve hydraulic motor that can meet the above requirements as much as possible.

Contents of the invention

In order to solve the above-mentioned shortcomings in the prior art, the present invention provides an inner curve hydraulic motor with two-way oil distribution, which realizes two-way oil distribution in the middle of the motor, making the motor more compact in structure, higher in flow distribution efficiency, and more reliable in performance.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an inner curve hydraulic motor with two-way oil distribution, including two rotors fixed to each other, a casing sleeved on each of the rotors and connected to the two The oil distribution cover between the casings, each of the casings includes an output cover and a stator body, the output cover is fixed on the stator body, and there is a curved line in the stator body The guide rail, the rotor is evenly arranged with an even number of cylinder holes along the circumference, each of the cylinder holes is provided with a radially distributed plunger, and the top of the plunger is connected to a roller. The outer peripheral surface of the roller is in contact with the inner curved surface of the curved guide rail, and an oil distribution mechanism for distributing oil to the cylinder hole is arranged between each of the rotors and the oil distribution cover, two The oil distribution mechanism is respectively located on both sides of the oil distribution cover.

The upper and lower ends of the oil distribution cover are provided with a first oil port and a second oil port, and the oil distribution cover is provided with a high-pressure flow channel and a low-pressure flow channel, and the two first oil ports They are respectively connected with the high-pressure flow channels, and the two second oil ports are respectively connected with the low-pressure flow channels. The oil distribution cover is evenly arranged with an even number of left and right through flow channels in the circumferential direction. Half of the flow channel holes communicate with the high-pressure flow channel, half of the flow channel holes communicate with the low-pressure flow channel, and the flow channel holes communicated with the high-pressure flow channel communicate with the The flow channel holes communicated with the low-pressure flow channel are distributed at intervals, and the oil distribution mechanism is used to guide the hydraulic oil flowing out of the flow channel holes into the cylinder bores. In this structure, the main oil pipe of the system is connected to the first oil port and the second oil port on the end surface platform of the oil distribution cover, the first oil port is connected to high-pressure oil, and the high-pressure oil enters the high-pressure flow channel connected with it through the first oil port. Through the even-numbered flow channel holes that are evenly distributed at intervals and communicate with the high-pressure flow channel on the oil distribution cover, the flow channel holes axially penetrate the oil distribution cover, and the high-pressure oil flows through the flow channel openings to the two fixed oil distribution ports on both ends of the oil distribution cover. Then the hydraulic oil flowing out of the flow channel hole is introduced into the cylinder hole through the oil distribution mechanism, and when the two rotors rotate to the point where the flow distribution hole communicates with the low-pressure flow channel of the oil distribution cover, the plunger and the corresponding matching roller move along the The curved guide rail moves to the inside of the cylinder bore, and the oil flows out of the motor through the low-pressure flow channel in the oil distribution cover through the second oil port.

The rotor is composed of a main body and a protruding flow distribution part. Each of the oil distribution mechanisms includes an oil distribution plate with a shaft hole in the center, and the oil distribution plate is coaxially fixed on the oil distribution cover. , and the oil distribution plate is sleeved on the main part of the rotor, and the oil distribution plate has an oil-through surface in contact with the oil distribution cover and a contact with the rotor The oil distribution surface in contact with the distribution part, the oil passage surface is evenly distributed with an even number of distribution holes and installation holes in the upper direction, the installation holes are located between two adjacent distribution holes, and the installation holes A balance hole cover is installed inside, and a damping hole is opened at the bottom of the installation hole, and an even number of waist-shaped holes are evenly distributed on the upper circumference of the oil distribution surface, and the distribution holes correspond to the waist-shaped holes one by one. The holes are connected so that an oil distribution channel is formed between the distribution hole and the waist hole, and the oil distribution plate realizes accurate oil distribution to the plunger through the oil distribution channel. In this structure, when the oil distribution passage communicates with the high-pressure oil passage of the oil distribution cover, the high-pressure oil enters the cylinder bore of the rotor through the oil distribution passage, pushing the plunger in the cylinder bore of the rotor to move outward; when the oil distribution passage connects with the motor When the low-pressure oil passages of the oil distribution cover are connected, the low-pressure oil in the rotor cylinder hole enters the low-pressure oil passage of the oil distribution cover through the oil distribution passage, and the plunger moves inward in the rotor cylinder hole, so that the oil distribution plate realizes the inner curve motor. The precise oil distribution, but when the device is working, a large axial force will be generated between the oil distribution surface and the rotor end surface, so that the two end surfaces are separated from each other, and the gap becomes larger, resulting in increased leakage of the inner curve motor. The balance hole cover is installed in the installation hole, and the oil distribution surface and the end surface of the rotor are pressed tightly by the reverse hydraulic pressure of the high-pressure oil at the damping hole, and the axial force generated between the oil distribution surfaces is balanced to maintain a reasonable gap between the two ends. , to establish an oil film and reduce the leakage of hydraulic oil.

A preload spring corresponding to each of the flow distribution holes is provided between the oil distribution plate and the oil distribution cover to limit the preload spring to the end surface of the oil distribution cover. Inner spring seat. In this structure, by reasonably selecting the inner and outer diameters of the balance hole cover and the spring force of the preload spring, a good seal between the oil distribution plate and the oil distribution cover can be ensured, thereby effectively reducing the inner curve hydraulic motor. internal leakage.

Both sides of the waist-shaped hole are provided with counterbore for enlarging the oil distribution area. The counterbore is in the shape of a crescent or a semicircle. The junction of the waist-shaped hole and the distribution hole There are also symmetrically distributed semicircular unloading grooves. In this structure, the counterbore with a crescent-shaped structure or a semicircular structure increases the oil passage area of the waist-shaped hole, reduces pressure loss, and improves work efficiency. Compared with a circular hole with the same area, the waist-shaped hole The smaller radial dimension makes the motor structure more compact, and the semicircular unloading groove can start oil passage in advance and delay oil sealing, thereby eliminating the phenomenon of oil trapping and ensuring the smooth operation of the hydraulic motor.

The oil distribution plate has an annular protrusion adapted to the flow distribution part of the rotor, the oil distribution surface is the end surface of the annular protrusion, and the waist hole It is set on the annular protrusion, and two positioning holes are symmetrically opened on the oil distribution plate, and the two positioning holes are respectively located on both sides of the annular protrusion, and the two positioning holes are A plug screw is installed in the positioning hole, and one end of the plug screw is connected to the oil distribution cover. In this structure, the rotor has a depression, and the ring-shaped protrusion is set to fit the depression. The ring-shaped protrusion is coaxially arranged with the disk body, and the inner edge coincides, which strengthens the overall strength. The waist-shaped hole is set in the The position is also unaffected.

One end of the rotor cooperates with the inner peripheral wall of the output cover through a bearing. In this structure, the rotor is connected to the output cover through a bearing, which on the one hand enables the rotor to rotate smoothly, and on the other hand has a simple and reliable connection structure.

The rotor has a central through hole axially running through it. In this structure, each rotor adopts a hollow design, and the hydraulic motor outputs torque through the central through hole of the rotor, which can conveniently expand the function and application field of the hydraulic motor.

The outer periphery of the stator body of one of the casings is fixed with a mounting flange plate, and the rotor close to the mounting flange plate is an output rotor, and an oil seal is passed between the output rotor and the corresponding output cover The parts are sealed, and the central through hole of the output rotor is provided with splines. In this structure, the arrangement of the mounting flange plate facilitates the installation of the whole body, and the arrangement of the spline facilitates reliable connection with external components.

The other casing further includes a rear end cover, and the rear end cover is fixed on the corresponding output cover through connecting screws. The advantage is that the rear end cover and the corresponding output end cover are reliably connected, and at the same time, it is convenient for subsequent disassembly and maintenance.

Compared with the prior art, the present invention has the advantages of:

1. The motor flow distribution scheme adopts axial double-end surface flow distribution, which has higher flow distribution accuracy and volumetric efficiency. By reasonably selecting the inner and outer diameters of the oil distribution plate balance hole cover and the size of the preload spring force, the flow distribution plate, the rotor, and the flow distribution cover are in good condition. Sealing, reducing internal leakage of the motor;

2. The axial double-end oil distribution enables the active parts of the motor to expand to both ends of the oil distribution cover at the same time. Without increasing the radial dimension, the displacement of the motor is doubled and the application of the motor is expanded;

3. The axial support structure of the double-end face distribution plate is adopted, and the high-pressure oil drawn out from the distribution hole is used to act on the balance hole cover to balance the axial force generated during the axial flow distribution process, greatly reducing the axial length of the motor, and the overall Compared with other forms of hydraulic motor transmission or reducer transmission with the same power, the weight can be reduced by more than 30%.

4. The working cylinder of the motor and the output shaft are combined into one, which saves raw materials and improves assembly and working reliability;

5. The output shaft of the motor adopts a hollow through-hole design, which can easily expand the auxiliary functions and application fields of the motor.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a three-dimensional structural schematic diagram 1 of an oil distribution plate in the present invention;

Fig. 3 is the three-dimensional structural schematic diagram II of the oil distribution plate in the present invention;

Fig. 4 is a schematic plan view of the oil distribution plate in the present invention;

Fig. 5 is a sectional view of A-A in Fig. 4 of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment 1: As shown in the figure, a two-way oil distribution inner curve hydraulic motor includes two rotors 1 fixed to each other, a casing 14 sleeved on each rotor 1, and a casing 14 connected between the two casings 14. Each casing 14 includes an output cover 21 and a stator body 22. The output cover 21 is fixed on the stator body 22. There is a curved guide rail 23 inside the stator body 22. The rotor 1 is evenly distributed along the circumferential direction. An even number of cylinder holes 24 are arranged, each cylinder hole 24 is provided with a radially distributed plunger 25, the top of the plunger 25 is connected with a roller 26, and the outer peripheral surface of the roller 26 is in contact with the inner curved surface of the curved guide rail 23 An oil distribution mechanism for distributing oil to the cylinder bore 24 is provided between each rotor 1 and the oil distribution cover 15 , and the two oil distribution mechanisms are respectively located on both sides of the oil distribution cover 15 .

Embodiment 2: As shown in the figure, other structures are the same as Embodiment 1. The difference is that a first oil port 16 and a second oil port 17 are arranged on the upper and lower ends of the oil distribution cover 15, and the oil distribution cover 15 15 is provided with a high-pressure flow channel 18 and a low-pressure flow channel 19, the two first oil ports 16 communicate with the high-pressure flow channel 18 respectively, and the two second oil ports 17 communicate with the low-pressure flow channel 19 respectively, and the oil distribution cover 15 An even number of flow channel holes 20 are evenly arranged in the circumferential direction, half of the flow channel holes 20 are connected to the high-pressure flow channel 18, half of the flow channel holes 20 are connected to the low-pressure flow channel 19, and the flow channel holes 20 connected to the high-pressure flow channel 18 are connected to each other. The channel holes 20 and the channel holes 20 communicating with the low-pressure channel 19 are distributed at intervals, and the oil distribution mechanism is used to guide the hydraulic oil flowing out of the channel holes 20 into the cylinder bore 24 . In this structure, the main oil pipe of the system is connected to the first oil port 16 and the second oil port 17 on the end platform of the oil distribution cover 15, the first oil port 16 is connected to high-pressure oil, and the high-pressure oil enters through the first oil port 16 and communicates with it The high-pressure flow channel 18 passes through the even-numbered flow channel holes 20 on the oil distribution cover 15 communicated with the high-pressure flow channel 18. The flow channel holes 20 axially penetrate the oil distribution cover 15, and the high-pressure oil passes through the flow channel holes. 20 flows to the two oil distribution plates 27 fixed on both ends of the oil distribution cover 15, and then the hydraulic oil flowing out of the channel hole 20 is introduced into the cylinder hole 24 through the oil distribution mechanism, and when the two rotors 1 rotate to the flow distribution hole 30 and the When the low-pressure flow channel 19 of the oil distribution cover 15 is connected, the plunger 25 and the corresponding matching roller 26 move toward the inside of the cylinder hole 24 along the curved guide rail 23, and the oil passes through the low-pressure flow channel 19 in the oil distribution cover 15 and exits the second Port 17 drains the motor.

The rotor 1 is composed of a main body 11 and a protruding flow distribution part 12. Each oil distribution mechanism includes an oil distribution plate 27 with a shaft hole in the center. The oil distribution plate 27 is coaxially fixed on the oil distribution cover 15, and the oil distribution plate 27 is sleeved on the main body part 11 of the rotor 1, and the oil distribution plate 27 has an oil distribution surface 28 in contact with the oil distribution cover 15 and an oil distribution surface 29 in contact with the distribution part 12 of the rotor 1, the oil distribution surface 28 There are an even number of distribution holes 30 and installation holes 31 evenly distributed in the circumferential direction, the installation holes 31 are located between two adjacent distribution holes 30, and a balance hole cover 32 is installed in the installation holes 31, and a damping hole is opened at the bottom of the installation holes 31 33. An even number of waist-shaped holes 34 are evenly distributed on the oil distribution surface 29 in the circumferential direction, and the distribution holes 30 communicate with the waist-shaped holes 34 one by one, so that an oil distribution channel 35 is formed between the distribution holes 30 and the waist-shaped holes 34, and the oil distribution The disc 27 realizes accurate oil distribution to the plunger 25 through the oil distribution channel 35 . In this structure, when the oil distribution channel 35 communicates with the high-pressure oil channel of the oil distribution cover 15, the high-pressure oil enters the cylinder hole 24 of the rotor 1 through the oil distribution channel 35, and pushes the plunger 25 in the cylinder hole 24 of the rotor 1 outward. movement; when the oil distribution passage 35 communicates with the low-pressure oil passage of the motor oil distribution cover 15, the low-pressure oil in the rotor 1 cylinder hole 24 enters the low-pressure oil passage of the oil distribution cover 15 through the oil distribution passage 35, and the plunger 25 is in the rotor 1 cylinder In this way, the oil distribution plate 27 realizes the precise oil distribution of the inner curve motor, but when the device is working, a large axial force will be generated between the oil distribution surface 29 and the end surface of the rotor 1, so that The two end faces are separated from each other, and the gap becomes larger, resulting in increased leakage of the inner curve motor. By installing the balance hole cover 32 in the installation hole 31, and by using the reverse hydraulic pressure of the high-pressure oil at the damping hole 33, the oil distribution surface 29 Press against the end face of the rotor 1 to balance the axial force generated between the oil distribution surfaces 29, so that the two ends maintain a reasonable gap, establish an oil film, and reduce the leakage of hydraulic oil.

A preload spring 41 corresponding to each distribution hole 30 and a spring seat 42 for restricting the preload spring 41 in the end surface of the oil distribution cover 15 are arranged between the oil distribution plate 27 and the oil distribution cover 15 . In this structure, by reasonably selecting the inner and outer diameters of the balance hole cover 32 and the spring force of the preload spring 41, a good seal between the oil distribution plate 27 and the oil distribution cover 15 can be ensured, thereby effectively reducing the Inner curve hydraulic motor internal leakage.

Both sides of the waist hole 34 are respectively provided with counterbore 36 for enlarging the oil distribution surface 29. The counterbore 36 is in a crescent-shaped structure or a semicircular structure. Distributed semicircular unloading grooves 37. In this structure, the counterbore 36 with a crescent-shaped structure or a semicircular structure increases the oil passage area of the waist-shaped hole 34, reduces pressure loss, and improves work efficiency. Compared with the same area, the waist-shaped hole 34 The radial dimension of the circular hole is smaller, making the motor structure more compact, and the semicircular unloading groove 37 can start oil passage in advance and delay oil sealing, thereby eliminating oil trapping and ensuring the smooth operation of the hydraulic motor.

The oil distribution plate 27 has an annular protruding portion 38 adapted to the flow distribution portion 12 of the rotor 1, the oil distribution surface 29 is the end face of the annular protruding portion 38, and the waist-shaped hole 34 is opened on the annular protruding portion 38 , two positioning holes 39 are symmetrically opened on the oil distribution plate 27, and the two positioning holes 39 are respectively located on both sides of the annular protrusion 38, and plugging screws 40 are installed in the two positioning holes 39, and the plugging screws 40 One end is connected on the oil distribution cover 15. In this structure, the rotor 1 has a depression, and the ring-shaped protrusion 38 is set to fit the depression. The ring-shaped protrusion 38 is coaxially arranged with the disk body, and the inner edges overlap, which enhances the overall strength and waist-shaped The arrangement of the holes 34 in this position is also unaffected.

Embodiment 3: As shown in the figure, other structures are the same as Embodiment 2, the difference is that one end of the rotor 1 is matched with the inner peripheral wall of the output cover 21 through the bearing 43 . In this structure, the rotor 1 is connected to the output cover 21 through a bearing 43 , on the one hand, the rotor 1 can rotate smoothly, and on the other hand, the connection structure is simple and reliable.

The rotor 1 has a central through hole 13 extending axially through it. In this structure, each rotor 1 adopts a hollow design, and the hydraulic motor outputs torque through the central through hole 13 of the rotor 1, which can conveniently expand the function and application field of the hydraulic motor.

The outer periphery of the stator body 22 of one of the casings 14 is fixed with a mounting flange plate, and the rotor 1 close to the mounting flange plate is the output rotor, and the oil seal 45 is used to seal the output rotor and the corresponding output cover 21, and the output rotor A spline 46 is arranged in the central through hole 13 of the . In this structure, the arrangement of the mounting flange plate facilitates the installation of the whole body, and the arrangement of the spline 46 facilitates reliable connection with external components.

The other casing 14 also includes a rear end cover 47 , and the rear end cover 47 is fixed on the corresponding output cover 21 by connecting screws 48 . The advantage is that the rear end cover 47 is reliably connected to the corresponding output end cover, and at the same time, it is convenient for subsequent disassembly and maintenance.

The hydraulic motor adopts two-way oil distribution on the axial end surface and a radial plunger 25 inner curve structure. The motor connects the mounting flange plate with the main engine structure through screws and fixes it. One end of one rotor 1 has an output end of a spline 46. Cooperate with the output shaft of the main engine, and use the rotary motion of the two rotors 1 of the hollow structure of the motor to output torque, so as to obtain greater torque. The main oil pipe of the system is connected to the first oil port 16 and the second oil port 17 on the end platform of the oil distribution cover 15, the first oil port 16 is connected to high-pressure oil, and the high-pressure oil enters the high-pressure flow channel connected with it through the first oil port 16 18. The even-numbered runner holes 20 communicated with the high-pressure runner 18 on the oil distribution cover 15, the runner holes 20 axially penetrate the oil distribution cover 15, and the high-pressure oil flows to the oil distribution seal through the flow channel holes 20 Two oil distribution pans 27 fixed on both ends of the cover 15.

Then the high-pressure oil flowing out passes through the waist-shaped holes 34 on the oil distribution plate 27 symmetrically installed at both ends, and enters the cylinder hole 24 of the distribution part 12 of the rotor 1 from the distribution hole 30 of the oil distribution surface 29 of the rotor 1, and the high-pressure oil pushes The plunger 25 in the cylinder hole 24 and the cooperating roller 26 move outward along the curved guide rail 23, and the force is transmitted to the inner curved surface of the curved guide rail 23 through the roller 26, and the tangential force generated by the high-pressure oil pushes the roller 26 moves along the curved surface of the curved guide rail 23 to generate torque, and the roller 26 transmits the reaction force to the plunger 25 in the cylinder hole 24 to generate rotation. When the two rotors 1 rotate until the distribution hole 30 communicates with the low-pressure channel 19 of the oil distribution cover 15, the plunger 25 and the corresponding matching roller 26 move along the curved guide rail 23 to the inside of the cylinder hole 24, and the oil passes through the oil distribution cover. The low-pressure flow passage 19 in 15 is discharged from the motor through the second oil port 17. With the rotation of the rotor 1, the high and low pressure chambers change alternately, the volume of the cylinder bore 24 of the rotor 1 on the high pressure side gradually increases, and the volume of the cylinder bore 24 of the rotor 1 on the low pressure side gradually decreases. Such reciprocating motion realizes the motor Oil inlet and outlet. How much is the number of curved surfaces of the curved guide rail 23? When the motor rotates an even number of plungers 25, the oil will enter and discharge several times. Each curved surface of the curved guide rail 23 is divided into two halves, and half is the oil inlet section. Output torque, the other half is the oil return section, and the internal drain oil of the motor is discharged into the system oil tank through the oil discharge port.

It is worth noting that the above description is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. The present invention can also improve the materials and structures of the above-mentioned various components, or use technical equivalents are substituted. Therefore, all equivalent structural changes made by using the description and illustrations of the present invention, or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims

An inner curve hydraulic motor with two-way oil distribution, which is characterized in that it includes two rotors fixed to each other, a casing sleeved on each of the rotors, and a fitting connected between the two casings. Oil seal cover, each of the casings includes an output cover and a stator body, the output cover is fixed on the stator body, there is a curved guide rail in the stator body, and the upper edge of the rotor is There are an even number of cylinder holes evenly arranged in each cylinder hole, and radially distributed plungers are arranged in each of the cylinder holes. The inner curved surfaces of the curved guide rails are in contact, and an oil distribution mechanism for distributing oil to the cylinder holes is arranged between each of the rotors and the oil distribution cover, and the two oil distribution mechanisms are respectively located at the Both sides of the oil distribution cover described above.
The inner curve hydraulic motor with two-way oil distribution according to claim 1, characterized in that: the upper and lower ends of the oil distribution cover are provided with a first oil port and a second oil port; The oil seal cover is provided with a high-pressure flow channel and a low-pressure flow channel, the two first oil ports communicate with the high-pressure flow channel respectively, and the two second oil ports communicate with the low-pressure flow channel respectively. The oil distribution cover is evenly arranged in the circumferential direction with an even number of flow passage holes, half of the flow passage holes are connected with the high-pressure flow passage, and half of the flow passage holes are connected with the high-pressure flow passage. The low-pressure flow channel is connected, the flow channel holes connected with the high-pressure flow channel and the flow channel holes connected with the low-pressure flow channel are distributed at intervals, and the oil distribution mechanism is used to connect the flow channel The hydraulic oil flowing out of the hole is introduced into the cylinder hole.
The inner curve hydraulic motor with two-way oil distribution according to claim 1, characterized in that: the rotor is composed of a main body part and an outwardly protruding flow distribution part, and each of the oil distribution mechanisms includes a central shaft hole, the oil distribution plate is coaxially fixed on the oil distribution cover, and the oil distribution plate is sleeved on the main part of the rotor, and the oil distribution plate It has an oil passage surface in contact with the oil distribution cover and an oil distribution surface in contact with the flow distribution part of the rotor, and an even number of flow distribution holes and installation holes are evenly distributed on the upper surface of the oil passage surface. The installation hole is located between two adjacent distribution holes, and a balance hole cover is installed in the installation hole, and a damping hole is opened at the bottom of the installation hole, and the oil distribution surface is evenly distributed in the upper direction There are an even number of waist-shaped holes, and the distribution holes communicate with the waist-shaped holes one by one, so that an oil distribution channel is formed between the distribution holes and the waist-shaped holes. The oil pan realizes accurate oil distribution to the plunger through the oil distribution channel.
The inner curve hydraulic motor with two-way oil distribution according to claim 3, characterized in that: between the oil distribution plate and the oil distribution cover, there is a valve corresponding to each of the distribution holes. A pre-compression spring and a spring seat used to limit the pre-compression spring to the end surface of the oil distribution cover.
The inner curve hydraulic motor with two-way oil distribution according to claim 3, characterized in that: counterbore holes for enlarging the oil distribution area are opened on both sides of the waist-shaped hole, and the counterbore holes are in the shape of a crescent Shaped structure or semicircular structure, the junction of the waist hole and the distribution hole is also provided with symmetrically distributed semicircular unloading grooves.
The inner curve hydraulic motor with two-way oil distribution according to claim 3, wherein the oil distribution plate has an annular protruding part adapted to the flow distribution part of the rotor, and the The oil distribution surface is the end face of the annular protrusion, the waist-shaped hole is opened on the annular protrusion, and two positioning holes are symmetrically opened on the oil distribution plate, two The positioning holes are respectively located on both sides of the annular protrusion, and plugging screws are installed in the two positioning holes, and one end of the plugging screw is connected to the oil distribution cover .
The inner curve hydraulic motor with two-way oil distribution according to claim 1, wherein one end of the rotor cooperates with the inner peripheral wall of the output cover through a bearing.
The inner curve hydraulic motor with two-way oil distribution according to claim 1, characterized in that: said rotor has a central through hole axially passing through it.
The inner curve hydraulic motor with two-way oil distribution according to claim 8, characterized in that: a mounting flange plate is fixed on the outer circumference of the stator body of one of the casings, and a flange plate close to the mounting flange plate The rotor is an output rotor, and the seal between the output rotor and the corresponding output cover is realized by an oil seal, and a spline is arranged in the central through hole of the output rotor.
The inner curve hydraulic motor with two-way oil distribution according to claim 8, characterized in that: the other said housing also includes a rear end cover, and said rear end cover is fixed on the corresponding said on the output cover.