阅读说明：本技术 一种液压马达 (Hydraulic motor ) 是由 张卓 陈建 于 2021-05-13 设计创作，主要内容包括：本发明涉及液压马达技术领域,具体的说是一种液压马达,包括壳体、空腔、转子、输出轴和油管接口；所述转子的外侧壁设置有挡板槽；所述挡板槽位于叶片槽的两侧,挡板槽的底部与叶片槽的底部连通,挡板槽内设有一号挡板,所述一号挡板上设置有通孔,一号挡板能够在挡板槽内液压油的作用下沿着挡板槽内滑动；本发明通过叶片挤压叶片槽内的液压油,再与挡板槽内液压油推动一号挡板相配合,从而达到了防止气泡与叶片接触的目的,进而防止了液压油内的气泡在高压区破裂直接对叶片直接造成冲击,缓解了叶片被气泡破裂产生的冲击波所损伤的现象,进而延长了液压马达的使用寿命。(The invention relates to the technical field of hydraulic motors, in particular to a hydraulic motor which comprises a shell, a cavity, a rotor, an output shaft and an oil pipe interface, wherein the cavity is formed in the shell; the outer side wall of the rotor is provided with a baffle groove; the baffle slots are positioned at two sides of the blade slot, the bottom of the baffle slot is communicated with the bottom of the blade slot, a baffle I is arranged in the baffle slot, a through hole is formed in the baffle I, and the baffle I can slide along the baffle slot under the action of hydraulic oil in the baffle slot; according to the hydraulic motor, the hydraulic oil in the blade groove is extruded by the blade and then is matched with the first baffle pushed by the hydraulic oil in the baffle groove, so that the purpose of preventing the air bubbles from contacting with the blade is achieved, the air bubbles in the hydraulic oil are prevented from being broken in a high-pressure area and directly impacting the blade, the phenomenon that the blade is damaged by shock waves generated by the broken air bubbles is relieved, and the service life of the hydraulic motor is prolonged.)

1. A hydraulic motor comprises a shell (1), a rotor (3), an output shaft (4) and an oil pipe interface (5); a cavity (2) is arranged in the shell (1); the cross section of the cavity (2) is oval; the rotor (3) is positioned in the cavity (2), and the outer side wall of the rotor (3) is provided with a blade groove (6); a first spring (61) and a blade (62) are arranged in the blade groove (6), and hydraulic oil is filled in the blade groove (6); an oil pipe connector (5) is arranged on the outer side wall of the shell (1); the oil pipe connector (5) is communicated with the cavity (2) through an arc-shaped cavity (8); hydraulic oil in the hydraulic pump enters the cavity (2) through the oil pipe connector (5), and the hydraulic oil pushes the blade (62) and then flows out of the other oil pipe connector (5); the method is characterized in that: a baffle groove (7) is arranged on the outer side wall of the rotor (3); the baffle slots (7) are positioned at two sides of the corresponding blade slots (6), the bottoms of the baffle slots (7) are communicated with the bottoms of the blade slots (6) through the communicating holes (31), and a first baffle (71) is connected in the baffle slots (7) in a sliding manner; a through hole (73) is formed in the first baffle (71); hydraulic oil in the cavity (2) can permeate into the blade groove (6) and the baffle groove (7); the first baffle (71) can slide along the baffle slot (7) under the action of hydraulic oil in the baffle slot (7).

2. The hydraulic motor of claim 1, wherein: a second baffle (72) is arranged in the baffle groove (7); the second baffle (72) is arranged far away from the bottom of the baffle groove (7) relative to the first baffle (71), and the second baffle (72) and the first baffle (71) are consistent in structure; a step hole (74) is formed in the first baffle (71); the first baffle (71) penetrates through the step hole (74), a piston rod (75) is arranged in the step hole (74), and the step hole (74) is in sliding connection with the piston rod (75); one end of the piston rod (75) is fixedly connected with a piston (751), one end of the piston rod (75) fixedly connected with the piston (751) is positioned in the stepped hole (74), and the other end of the piston rod (75) penetrates through the first baffle (71) to be fixedly connected with the second baffle (72); a backflow hole (77) is formed in the first baffle (71); the backflow hole (77) is L-shaped, one end of the backflow hole (77) is communicated with the step hole (74), and the other end of the backflow hole is communicated with the baffle groove (7).

3. The hydraulic motor of claim 2, wherein: a second spring (76) is arranged between the first baffle (71) and the second baffle (72) in the baffle groove (7); the second spring (76) is sleeved on the corresponding piston rod (75).

4. The hydraulic motor of claim 3, wherein: a round hole (721) is formed in one end, far away from the baffle groove (7), of the second baffle (72); a ball (722) is arranged in the round hole (721); a part of the ball (722) is exposed out of the round hole (721), and the ball (722) is in rolling connection with the round hole (721).

5. The hydraulic motor of claim 4, wherein: the piston rods (75) are all sleeved with rotating blocks (67); the number of the rotating blocks (67) is two, the two rotating blocks (67) are located between the first baffle (71) and the second baffle (72), the two rotating blocks (67) are rotatably connected with the piston rod (75), and two ends, close to each other, of the two rotating blocks (67) are fixedly connected with two ends of the second spring (76) respectively; a cutting piece (761) is arranged on the outer side of the second spring (76); the cutting blades (761) are uniformly distributed along the spiral line of the second spring (76).

6. The hydraulic motor of claim 5, wherein: grooves (671) are uniformly arranged in the rotating block (67); the groove (671) is fan-shaped; the cutting piece (761) slope sets up, and the helix direction of inclination and No. two spring (76) is unanimous, thereby hydraulic oil can promote turning block (67) and cutting piece (761) drive No. two spring (76) and rotate.

Technical Field

The invention relates to the technical field of hydraulic motors, in particular to a hydraulic motor.

Background

The hydraulic motor is an actuating element of the hydraulic system, and converts hydraulic pressure energy provided by the hydraulic pump into mechanical energy of an output shaft of the hydraulic motor; the hydraulic motor is also called as oil motor, and the hydraulic motor can be divided into gear type, vane type, plunger type and other types according to the structural type, wherein the output torque of the vane type hydraulic motor is related to the displacement of the hydraulic motor and the pressure difference between the oil inlet and the oil outlet of the hydraulic motor, and the rotating speed is determined by the flow quantity input into the hydraulic motor; because the hydraulic motor generally requires positive and negative rotation, the blades of the blade type hydraulic motor are required to be placed in the radial direction; in order to ensure that the vane type hydraulic motor can be normally started after pressure oil is communicated, the top of the vane is tightly contacted with the inner surface of the stator to ensure good sealing, so that a first spring is arranged at the root of the vane; the vane type hydraulic motor has small volume, small rotational inertia and sensitive action, and can be suitable for occasions with higher reversing frequency; however, when the hydraulic motor works, bubbles are formed in the hydraulic oil in a low-pressure area and can be broken in a high-pressure area to generate a cavitation phenomenon, shock waves generated by the broken bubbles can damage the blades, and after a certain time, the surfaces of the blades can generate marks and cracks, and even the cracks gradually fall off in a sea surface shape; and the cavitation phenomenon makes the transmission of the hydraulic motor unstable and the housing vibrate.

For example, a chinese patent with application number CN201710965114.3 discloses a vane type hydraulic motor, which comprises the following technical solutions: the motor comprises a motor shaft, a rotor, a first end cover, a second end cover, a motor shell, a first sealing gland and a second sealing gland, wherein the inner peripheral wall of the first end cover and the outer peripheral wall of the motor shaft are arranged at intervals to form a first annular groove, the first annular groove is communicated with the end surface of the rotor and the end surface of a first bearing, a first control ring is positioned in the first annular groove and sleeved on the motor shaft, and the first control ring and the first annular groove are in clearance fit; when the vane type hydraulic motor provided by the embodiment of the scheme cools the first bearing and the second bearing, hydraulic oil circulates in the vane type hydraulic motor, and the circulation can avoid the leakage of the hydraulic oil, so that the safety of the vane type hydraulic motor is improved; however, the technical scheme does not solve the cavitation phenomenon generated by bubbles in the hydraulic oil, and only solves the problem of hydraulic oil leakage, thereby causing the limitation of the scheme.

In view of the above, in order to overcome the above technical problems, the present invention provides a hydraulic motor, which solves the above technical problems.

Disclosure of Invention

In order to make up for the defects of the prior art, the hydraulic motor provided by the invention has the advantages that the hydraulic oil in the blade groove is extruded by the blades and then is matched with the baffle plate which is pushed by the hydraulic oil in the baffle plate groove, so that the purpose that the baffle plate blocks the contact of bubbles and the blades is achieved, the bubbles in the hydraulic oil are prevented from being broken in a high-pressure area and directly impacting the blades, the condition that the blades are damaged by shock waves generated by the broken bubbles is relieved, and the service life of the hydraulic motor is prolonged.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a hydraulic motor which comprises a shell, a rotor, an output shaft and an oil pipe interface; a cavity is arranged in the shell; the cross section of the cavity is elliptical; the rotor is positioned in the cavity, and the outer side wall of the rotor is provided with a blade groove; a first spring and a blade are arranged in the blade groove, and hydraulic oil is filled in the blade groove; an oil pipe interface is arranged on the outer side wall of the shell; the oil pipe interface is communicated with the cavity through the arc-shaped cavity; hydraulic oil in the hydraulic pump enters the cavity through the oil pipe interface, and the hydraulic oil pushes the blade and then flows out of the other oil pipe interface; the outer side wall of the rotor is provided with a baffle groove; the baffle slots are positioned at two sides of the corresponding blade slots, the bottoms of the baffle slots are communicated with the bottoms of the blade slots through the communicating holes, and a first baffle is connected in the baffle slots in a sliding manner; the first baffle is provided with a through hole; hydraulic oil in the cavity can permeate into the blade grooves and the baffle grooves; the first baffle can slide along the baffle groove under the action of hydraulic oil in the baffle groove;

when the hydraulic motor works, hydraulic oil in the hydraulic pump enters a cavity in the hydraulic motor through an oil pipe connector, and the hydraulic oil in the cavity generates bubbles in a low-pressure area; the air bubbles in the hydraulic oil are broken in the high-pressure area; when the bubbles in the hydraulic oil touch the blades, the bubbles can be broken to generate cavitation, shock waves generated by the broken bubbles can damage the blades, and after a certain time, the surfaces of the blades can generate scars and cracks, even the cracks gradually fall off in a sea surface shape, so that the service life of the hydraulic motor is shortened; the generation of cavitation can cause unstable transmission of the hydraulic motor and vibration of the shell;

therefore, hydraulic oil in the hydraulic pump is connected through one of the oil pipe interfaces, the hydraulic oil flows into the cavity through the arc-shaped cavity, the hydraulic oil in the cavity pushes the blades to rotate around the rotor, the hydraulic oil enters between the two blades, the space between the two blades is increased along with the rotation volume of the rotor, but the amount of the hydraulic oil between the two blades is unchanged, so that the pressure of the hydraulic oil is reduced relative to the liquid pressure of the hydraulic oil in the hydraulic pump, and the hydraulic oil in the cavity generates bubbles in a low-pressure area; when the two blades are symmetrically arranged on two sides of the connecting line of the top points of the cavities along with the rotation of the blades, the pressure intensity of hydraulic oil between the two blades is the lowest, and the space between the two blades is reduced along with the continuous rotation of the blades, so that the pressure intensity of the hydraulic oil is increased, and bubbles in the hydraulic oil are broken in a high-pressure area; at the moment, the outer wall of the cavity extrudes the blade, the blade slides towards the bottom of the blade groove in the blade groove and compresses the first spring, hydraulic oil in the blade groove is extruded by the blade and reaches the baffle groove through the communicating hole, so that the hydraulic oil in the baffle groove pushes the first baffle to slide towards the outer side wall of the cavity along the baffle groove, the first baffle extends out of the baffle groove and then is blocked at two sides of the blade, and the first baffle can be impacted by the broken bubble, so that the broken bubble is prevented from directly impacting the blade; the vanes continue to rotate, so that hydraulic oil between the two vanes is discharged from the other oil pipe interface along the arc-shaped cavity;

when the distance between the outer side wall of the cavity and the rotor is gradually increased, the first spring pushes the blade to slide towards the direction away from the bottom of the blade groove, so that one end of the blade away from the blade groove is always in contact with the outer side wall of the cavity, the space between the bottom of the blade and the blade groove is increased, the pressure of hydraulic oil in the blade groove and the baffle groove is reduced, and the pressure of the hydraulic oil in the blade groove and the baffle groove is smaller than that of the hydraulic oil in the cavity, so that the first baffle can slide towards the bottom of the baffle groove along the baffle groove by the hydraulic oil in the cavity, the first baffle retracts into the baffle groove, the first baffle prevents the hydraulic oil from blocking the hydraulic oil to fill the space between the two blades when the hydraulic oil enters the cavity, and the first baffle is prevented from occupying the space between the two blades, and the implementation stability of the invention is improved; the blades drive the rotor to rotate, so that the rotor drives the output shaft to rotate;

according to the invention, the hydraulic oil in the blade groove is extruded by the blade and then is matched with the baffle plate which is pushed by the hydraulic oil in the baffle plate groove, so that the purpose that the baffle plate blocks the contact of the bubbles and the blade is achieved, the bubbles in the hydraulic oil are prevented from being broken in a high-pressure area to directly impact the blade, the condition that the blade is damaged by shock waves generated by the broken bubbles is relieved, and the service life of the hydraulic motor is prolonged.

Preferably, a second baffle is arranged in the baffle groove; the second baffle is arranged relative to the first baffle and far away from the bottom of the baffle groove, and the second baffle is consistent with the first baffle in structure; a step hole is formed in the first baffle; the stepped hole penetrates through the first baffle, a piston rod is arranged in the stepped hole, and the stepped hole is in sliding connection with the piston rod; one end of the piston rod is fixedly connected with the piston, one end of the piston rod fixedly connected with the piston is positioned in the step hole, and the other end of the piston rod penetrates through the first baffle and is fixedly connected with the second baffle; a backflow hole is formed in the first baffle; the backflow hole is L-shaped, one end of the backflow hole is communicated with the step hole, and the other end of the backflow hole is communicated with the baffle groove;

when the hydraulic oil-driven baffle works, the hydraulic oil in the blade groove pushes the first baffle to drive the piston rod and the second baffle to slide together, and meanwhile, the hydraulic oil in the baffle groove also pushes the piston to drive the piston rod to slide in the first baffle in the direction far away from the bottom of the baffle groove; when the piston rod slides, the piston can extrude the hydraulic oil in the step hole, so that the hydraulic oil flows into the baffle groove through the backflow hole, and the piston rod is prevented from being incapable of moving due to overlarge pressure intensity of the hydraulic oil between the piston rod and the first baffle; the distance between the first baffle and the second baffle is increased under the action of the piston rod until the second baffle can be contacted with the outer side wall of the cavity; when the first spring pushes the blade to slide towards the direction far away from the bottom of the blade groove, the pressure of hydraulic oil in the blade groove and the baffle groove is reduced, so that the hydraulic oil in the cavity can push the second baffle and the piston rod to slide along the baffle groove towards the direction close to the bottom of the baffle groove; after the step hole in the first baffle is machined, the first baffle is cut along the step hole, so that the piston and the piston rod can be installed in the step hole, and the first baffle is welded into a whole after the piston and the piston rod are installed;

the stepped hole is formed in the first baffle plate, and the first baffle plate is matched with the piston rod arranged in the stepped hole, so that the second baffle plate can be contacted with the outer side wall of the cavity when being completely extended out, and meanwhile, the piston rod can intercept bubbles in the cavity after being extended out, the range of intercepting the bubbles is enlarged, the blades are further protected, the using effect of the hydraulic motor is enhanced, and the service life of the hydraulic motor is prolonged.

Preferably, a second spring is arranged between the first baffle and the second baffle in the baffle groove; the second spring is sleeved on the corresponding piston rod;

when the baffle plate device works, hydraulic oil in the blade groove pushes the first baffle plate and the second baffle plate to slide along the baffle groove in the direction far away from the bottom of the baffle groove, and meanwhile, the second spring pushes the second baffle plate, so that the second baffle plate can slide under the pushing of the second spring and the piston rod, the moving speed of the second baffle plate is increased, and the bubble intercepting efficiency is improved; when the first baffle and the second baffle slide along the baffle groove towards the direction close to the bottom of the baffle groove, the second spring is compressed by the first baffle and the second baffle;

according to the invention, the second spring is arranged between the first baffle and the second baffle and is sleeved on the piston rod to be matched with the second spring, so that the baffle far away from the bottom of the baffle groove can slide under the pushing of the piston rod and the second spring, the moving speed of the second baffle is accelerated, the efficiency of intercepting bubbles is improved, the use effect of the hydraulic motor is further improved, and the service life of the hydraulic motor is prolonged.

Preferably, a round hole is formed in one end, far away from the baffle groove, of the second baffle; the round hole is internally provided with a ball; a part of the ball is exposed out of the round hole, and the ball is in rolling connection with the round hole;

the during operation, the ball on No. two baffles contacts with the inner wall of casing, becomes rolling friction through the sliding friction of ball between with casing and the baffle, prevents to influence the rotor because frictional force is too big between casing and No. two baffles and drives the output shaft and rotate, and then does not influence hydraulic motor's result of use originally, through reducing the frictional force between casing and No. two baffles to the life of No. two baffles has been improved.

Preferably, the piston rods are sleeved with rotating blocks; the number of the rotating blocks is two, the two rotating blocks are positioned between the first baffle and the second baffle and are rotationally connected with the piston rod, and two ends, close to each other, of the two rotating blocks are fixedly connected with two ends of the second spring respectively; a cutting blade is arranged on the outer side of the second spring; the cutting pieces are uniformly distributed along the spiral line of the second spring;

when the hydraulic cutting machine works, the first baffle and the second baffle are arranged on two sides of the blade, hydraulic oil in the cavity pushes the rotating block and the cutting piece, so that the rotating block, the second spring and the cutting piece rotate around the piston rod simultaneously, the cutting piece can cut bubbles in the hydraulic oil when the hydraulic oil reaches a high-pressure zone, and the bubbles are broken;

according to the invention, the rotating block is arranged between the two baffles, and the rotating block is matched with the cutting blade arranged on the outer side of the second spring, so that the purpose that the rotating block, the second spring and the cutting blade rotate around the piston rod is achieved, the cutting blade can cut bubbles, the range of intercepting the bubbles is enlarged, the speed of breaking the bubbles is increased, the bubbles in hydraulic oil are cut by the cutting blade when passing through the first baffle and the second baffle, and the hydraulic oil does not contain bubbles when contacting with the blades after passing through the first baffle and the second baffle, so that the actual application effect of the hydraulic motor is improved, and the service life of the hydraulic motor is prolonged.

Preferably, the rotating blocks are uniformly provided with grooves; the groove is fan-shaped; the cutting blade is obliquely arranged, the inclination angle is consistent with the spiral line direction of the second spring, and the hydraulic oil can push the rotating block and the cutting blade to drive the second spring to rotate;

when the hydraulic cutting machine works, when the hydraulic oil in the cavity reaches the groove, the rotating block can be pushed to rotate around the piston rod, and meanwhile, the rotating block is matched with the cutting piece pushed by the hydraulic oil in the cavity, so that the rotating speed of the rotating block and the cutting piece is increased, the efficiency of cutting bubbles is improved, the practical application effect of the hydraulic cutting machine is further improved, and the service life of the hydraulic motor is prolonged.

The invention has the following beneficial effects:

1. according to the invention, the hydraulic oil in the blade groove is extruded by the blade and then is matched with the baffle plate which is pushed by the hydraulic oil in the baffle plate groove, so that the purpose that the baffle plate blocks the contact of the bubbles and the blade is achieved, the bubbles in the hydraulic oil are prevented from being broken in a high-pressure area to directly impact the blade, the condition that the blade is damaged by shock waves generated by the broken bubbles is relieved, and the service life of the hydraulic motor is prolonged.

2. The stepped hole is formed in the first baffle plate, and the first baffle plate is matched with the piston rod arranged in the stepped hole, so that the second baffle plate can be contacted with the outer side wall of the cavity when being completely extended out, and meanwhile, the piston rod can intercept bubbles in the cavity after being extended out, the range of intercepting the bubbles is enlarged, the blades are further protected, the using effect of the hydraulic motor is enhanced, and the service life of the hydraulic motor is prolonged.

3. According to the invention, the second spring is arranged between the first baffle and the second baffle and is sleeved on the piston rod to be matched with the second spring, so that the baffle far away from the bottom of the baffle groove can slide under the pushing of the piston rod and the second spring, the moving speed of the second baffle is accelerated, the efficiency of intercepting bubbles is improved, the use effect of the hydraulic motor is further improved, and the service life of the hydraulic motor is prolonged.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an internal structural view of the present invention;

FIG. 3 is a block diagram of the baffle slot of the present invention;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 3;

FIG. 6 is a perspective view of the first and second baffles of the present invention;

in the figure: 1. a housing; 2. a cavity; 3. a rotor; 31. a communicating hole; 4. an output shaft; 5. an oil pipe interface; 6. a blade groove; 61. a first spring; 62. a blade; 7. a baffle slot; 71. a first baffle plate; 72. a second baffle plate; 73. a through hole; 74. a stepped bore; 75. a piston rod; 751. a piston; 77. a return orifice; 76. a second spring; 721. a circular hole; 722. a ball bearing; 67. rotating the block; 761. cutting the slices; 671. a groove; 8. an arcuate chamber.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, the hydraulic motor of the present invention includes a housing 1, a rotor 3, an output shaft 4, and an oil pipe connector 5; a cavity 2 is arranged in the shell 1; the cross section of the cavity 2 is oval; the rotor 3 is positioned in the cavity 2, and the outer side wall of the rotor 3 is provided with a vane groove 6; a first spring 61 and a blade 62 are arranged in the blade groove 6, and the blade groove 6 is filled with hydraulic oil; an oil pipe connector 5 is arranged on the outer side wall of the shell 1; the oil pipe connector 5 is communicated with the cavity 2 through an arc-shaped cavity 8; hydraulic oil in the hydraulic pump enters the cavity 2 through the oil pipe connector 5, and flows out from the other oil pipe connector 5 after pushing the blades 62; a baffle groove 7 is arranged on the outer side wall of the rotor 3; the baffle slots 7 are positioned at two sides of the corresponding blade slots 6, the bottoms of the baffle slots 7 are communicated with the bottoms of the blade slots 6 through the communication holes 31, and a first baffle 71 is connected in the baffle slots 7 in a sliding manner; a through hole 73 is formed in the first baffle 71; hydraulic oil in the cavity 2 can permeate into the blade grooves 6 and the baffle grooves 7; the first baffle 71 can slide along the baffle slot 7 under the action of hydraulic oil in the baffle slot 7;

when the hydraulic motor works, hydraulic oil in the hydraulic pump enters the cavity 2 in the hydraulic motor through the oil pipe connector 5, and the hydraulic oil in the cavity 2 generates bubbles in a low-pressure area; the air bubbles in the hydraulic oil are broken in the high-pressure area; when the bubbles in the hydraulic oil touch the blades 62, the bubbles can be broken to generate cavitation, shock waves generated by the broken bubbles can damage the blades 62, and after a certain time, the surfaces of the blades 62 can generate marks and cracks, even the cracks gradually fall off in a sea surface shape, so that the service life of the hydraulic motor is shortened; and the generation of cavitation can make the transmission of the hydraulic motor unstable and the shell 1 vibrate;

therefore, the hydraulic oil in the hydraulic pump is connected through one of the oil pipe interfaces 5, the hydraulic oil flows into the cavity 2 through the arc-shaped cavity 8, the hydraulic oil in the cavity 2 pushes the vanes 62 to rotate around the rotor 3, the hydraulic oil enters between the two vanes 62, the space between the two vanes 62 is increased along with the rotation volume of the rotor 3, but the amount of the hydraulic oil between the two vanes 62 is unchanged, so that the pressure of the hydraulic oil is reduced relative to the pressure of the hydraulic oil liquid in the hydraulic pump, and the hydraulic oil in the cavity 2 generates bubbles in a low-pressure area; as the vanes 62 rotate, when the two vanes 62 are symmetrically arranged at two sides of the connecting line of the top points of the cavity 2, the pressure intensity of the hydraulic oil between the two vanes 62 is the lowest, and as the vanes 62 continue to rotate, the space between the two vanes 62 is reduced, so that the pressure intensity of the hydraulic oil is increased, and bubbles in the hydraulic oil are broken in a high-pressure area; at this time, the outer wall of the cavity 2 presses the blade 62, the blade 62 slides towards the bottom of the blade slot 6 in the blade slot 6 and compresses the first spring 61, hydraulic oil in the blade slot 6 is also pressed by the blade 62 and reaches the baffle slot 7 through the communication hole 31, so that the hydraulic oil in the baffle slot 7 pushes the first baffle 71 to slide along the baffle slot 7 towards the outer side wall of the cavity 2, the first baffle 71 extends out of the baffle slot 7 and then is blocked at two sides of the blade 62, and the broken bubble can impact the first baffle 71 to prevent the broken bubble from directly impacting the blade 62; the vanes 62 continue to rotate, so that the hydraulic oil between the two vanes 62 is discharged from the other oil pipe joint 5 along the arc-shaped cavity 8;

when the vane 62 continues to rotate, and the distance between the outer side wall of the cavity 2 and the rotor 3 gradually increases, the first spring 61 pushes the vane 62 to slide towards the direction away from the bottom of the vane slot 6, so that one end of the vane 62 away from the vane slot 6 is always in contact with the outer side wall of the cavity 2, the space between the bottom of the vane 62 and the vane slot 6 is increased, the pressure of hydraulic oil in the vane slot 6 and the baffle slot 7 is reduced, the pressure of the hydraulic oil in the vane slot 6 and the baffle slot 7 is lower than that of the hydraulic oil in the cavity 2, so that the hydraulic oil in the cavity 2 can enable the first baffle 71 to slide towards the bottom of the baffle slot 7 along the baffle slot 7, the first baffle 71 retracts into the baffle slot 7, the first baffle 71 is prevented from obstructing the hydraulic oil from filling the space between the two vanes 62 when the hydraulic oil enters the cavity 2, and the first baffle 71 is prevented from occupying the space between the two vanes 62, thereby improving the implementation stability of the invention; the blades 62 drive the rotor 3 to rotate, so that the rotor 3 drives the output shaft 4 to rotate;

according to the invention, the hydraulic oil in the blade groove 6 is extruded by the blade 62 and then is matched with the hydraulic oil in the baffle groove 7 for pushing the baffle 71, so that the purpose that the baffle 71 prevents the air bubbles from contacting with the blade 62 is achieved, the air bubbles in the hydraulic oil are prevented from being broken in a high-pressure area and directly impacting the blade 62, the condition that the blade 62 is damaged by shock waves generated by the broken air bubbles is relieved, and the service life of the hydraulic motor is prolonged.

As an embodiment of the invention, a second baffle 72 is arranged in the baffle slot 7; the second baffle 72 is arranged far away from the bottom of the baffle slot 7 relative to the first baffle 71, and the second baffle 72 and the first baffle 71 are consistent in structure; a step hole 74 is formed in the first baffle 71; the stepped hole 74 penetrates through the first baffle 71, a piston rod 75 is arranged in the stepped hole 74, and the stepped hole 74 is in sliding connection with the piston rod 75; one end of the piston rod 75 is fixedly connected with a piston 751, one end of the piston rod 75, which is fixedly connected with the piston 751, is positioned in the stepped hole 74, and the other end of the piston rod 75 penetrates through the first baffle 71 and is fixedly connected with the second baffle 72; a backflow hole 77 is formed in the first baffle 71; the backflow hole 77 is L-shaped, one end of the backflow hole 77 is communicated with the step hole 74, and the other end of the backflow hole 77 is communicated with the baffle groove 7;

during operation, hydraulic oil in the blade groove 6 pushes the first baffle 71 to enable the first baffle 71 to drive the piston rod 75 and the second baffle 72 to slide together, and meanwhile, hydraulic oil in the baffle groove 7 also pushes the piston 751 to enable the piston 751 to drive the piston rod 75 to slide in the first baffle 71 in a direction away from the bottom of the baffle groove 7; when the piston rod 75 slides, the piston 751 presses hydraulic oil in the step hole 74, so that the hydraulic oil flows into the baffle slot 7 through the return hole 77, and the situation that the piston rod 75 cannot move due to too high hydraulic oil pressure between the piston rod 75 and the first baffle 71 is prevented; the distance between the first baffle 71 and the second baffle 72 is increased under the action of the piston rod 75 until the second baffle 72 can contact with the outer side wall of the cavity 2; when the first spring 61 pushes the vane 62 to slide away from the bottom of the vane slot 6, the pressure of hydraulic oil in the vane slot 6 and the baffle slot 7 is reduced, so that the hydraulic oil in the cavity 2 can push the second baffle 72 and the piston rod 75 to slide along the baffle slot 7 towards the direction close to the bottom of the baffle slot 7; after the step hole 74 in the first baffle plate 71 is machined, the first baffle plate 71 is cut along the step hole 74, so that the piston and the piston rod 75 can be installed in the step hole 74, and the first baffle plate 71 is welded into a whole after the piston and the piston rod 75 are installed;

according to the invention, the stepped hole 74 is formed in the first baffle plate 71, and the first baffle plate is matched with the piston rod 75 arranged in the stepped hole 74, so that the second baffle plate 72 can be contacted with the outer side wall of the cavity 2 when being completely extended out, and meanwhile, the piston rod 75 can intercept bubbles in the cavity 2 after being extended out, thereby enlarging the range of intercepting bubbles, further protecting the blades 62, enhancing the using effect of the hydraulic motor and prolonging the service life of the hydraulic motor.

As an embodiment of the invention, a second spring 76 is arranged between the first baffle 71 and the second baffle 72 in the baffle slot 7; the second spring 76 is sleeved on the corresponding piston rod 75;

when the air bubble intercepting device works, hydraulic oil in the blade groove 6 pushes the first baffle 71 and the second baffle 72 to slide along the baffle groove 7 in the direction far away from the bottom of the baffle groove 7, and meanwhile, the second spring 76 pushes the second baffle 72, so that the second baffle 72 can slide under the pushing of the second spring 76 and the piston rod 75, the moving speed of the second baffle 72 is increased, and the air bubble intercepting efficiency is improved; when the first shutter 71 and the second shutter 72 slide along the shutter slot 7 toward the direction close to the bottom of the shutter slot 7, the second spring 76 is compressed by the first shutter 71 and the second shutter 72;

according to the invention, the second spring 76 is arranged between the first baffle 71 and the second baffle 72 and is sleeved on the piston rod 75 to be matched with the second spring 76, so that the baffle far away from the bottom of the baffle groove 7 can slide under the pushing of the piston rod 75 and the second spring 76, the moving speed of the second baffle 72 is accelerated, the efficiency of intercepting bubbles is improved, the use effect of the hydraulic motor is further improved, and the service life of the hydraulic motor is prolonged.

As an embodiment of the present invention, the second baffle 72 is provided with a round hole 721 at an end far from the baffle slot 7; a ball 722 is arranged in the round hole 721; a part of the ball 722 is exposed out of the round hole 721, and the ball 722 is in rolling connection with the round hole 721;

during operation, the ball 722 on No. two baffles 72 and the inner wall contact of casing 1 become rolling friction through the sliding friction of ball 722 between with casing 1 and the baffle, prevent to influence rotor 3 and drive output shaft 4 and rotate because frictional force is too big between casing 1 and No. two baffles 72, and then do not influence the result of use that hydraulic motor originally, through reducing the frictional force between casing 1 and No. two baffles 72 to No. two baffles 72's life has been improved.

As an embodiment of the present invention, the piston rods 75 are all sleeved with a rotating block 67; the number of the rotating blocks 67 is two, the two rotating blocks 67 are located between the first baffle 71 and the second baffle 72, the two rotating blocks 67 are rotatably connected with the piston rod 75, and two ends, close to each other, of the two rotating blocks 67 are fixedly connected with two ends of the second spring 76 respectively; a cutting piece 761 is arranged on the outer side of the second spring 76; the cutting sheets 761 are uniformly distributed along the spiral line of the second spring 76;

when the hydraulic cutting machine works, the first baffle 71 and the second baffle 72 are arranged on two sides of the blade 62, hydraulic oil in the cavity 2 pushes the rotating block 67 and the cutting piece 761, so that the rotating block 67, the second spring 76 and the cutting piece 761 rotate around the piston rod 75 at the same time, and the cutting piece 761 can cut bubbles in the hydraulic oil when the hydraulic oil reaches a high-pressure zone, and further the bubbles are broken;

according to the invention, the rotating block 67 is arranged between the two baffles, and the rotating block 67, the second spring 76 and the cutting piece 761 are matched with the outer side of the second spring 76, so that the purpose that the rotating block 67, the second spring 76 and the cutting piece 761 rotate around the piston rod 75 is achieved, the cutting piece 761 can cut bubbles, the range of intercepting the bubbles is enlarged, the speed of breaking the bubbles is increased, the bubbles in hydraulic oil are cut by the cutting piece 761 when passing through the first baffle 71 and the second baffle 72, and the hydraulic oil does not contain bubbles when contacting with the blades 62 after passing through the first baffle 71 and the second baffle 72, so that the practical application effect of the hydraulic motor is improved, and the service life of the hydraulic motor is prolonged.

As an embodiment of the present invention, grooves 671 are uniformly formed in the rotating block 67; the groove 671 is fan-shaped; the cutting piece 761 is obliquely arranged, the oblique angle is consistent with the spiral line direction of the second spring 76, and hydraulic oil can push the rotating block 67 and the cutting piece 761 to drive the second spring 76 to rotate;

when the hydraulic cutting machine works, when the hydraulic oil in the cavity 2 reaches the groove 671, the rotating block 67 is pushed to rotate around the piston rod 75 and is matched with the hydraulic oil in the cavity 2 for pushing the cutting piece 761, so that the rotating speeds of the rotating block 67 and the cutting piece 761 are increased, the bubble cutting efficiency is improved, the practical application effect of the hydraulic cutting machine is further improved, and the service life of the hydraulic motor is prolonged.

The specific working process is as follows:

according to the invention, hydraulic oil in a hydraulic pump is connected through one of the oil pipe interfaces 5, the hydraulic oil flows into the cavity 2 through the arc-shaped cavity 8, the hydraulic oil in the cavity 2 pushes the vanes 62 to rotate around the rotor 3, the hydraulic oil enters between the two vanes 62, the space between the two vanes 62 is increased along with the rotation volume of the rotor 3, but the amount of the hydraulic oil between the two vanes 62 is unchanged, so that the pressure of the hydraulic oil is reduced relative to the liquid pressure of the hydraulic oil in the hydraulic pump, and the hydraulic oil in the cavity 2 generates bubbles in a low-pressure area; as the vanes 62 rotate, when the two vanes 62 are symmetrically arranged at two sides of the connecting line of the top points of the cavity 2, the pressure intensity of the hydraulic oil between the two vanes 62 is the lowest, and as the vanes 62 continue to rotate, the space between the two vanes 62 is reduced, so that the pressure intensity of the hydraulic oil is increased, and bubbles in the hydraulic oil are broken in a high-pressure area; at this time, the outer wall of the cavity 2 presses the blade 62, the blade 62 slides towards the bottom of the blade slot 6 in the blade slot 6 and compresses the first spring 61, hydraulic oil in the blade slot 6 is also pressed by the blade 62 and reaches the baffle slot 7 through the communication hole 31, so that the hydraulic oil in the baffle slot 7 pushes the first baffle 71 to slide along the baffle slot 7 towards the outer side wall of the cavity 2, the first baffle 71 extends out of the baffle slot 7 and then is blocked at two sides of the blade 62, and the broken bubble can impact the first baffle 71 to prevent the broken bubble from directly impacting the blade 62; the vanes 62 continue to rotate, so that the hydraulic oil between the two vanes 62 is discharged from the other oil pipe joint 5 along the arc-shaped cavity 8; when the vane 62 continues to rotate, and the distance between the outer side wall of the cavity 2 and the rotor 3 gradually increases, the first spring 61 pushes the vane 62 to slide towards the direction away from the bottom of the vane slot 6, so that one end of the vane 62 away from the vane slot 6 is always in contact with the outer side wall of the cavity 2, the space between the bottom of the vane 62 and the vane slot 6 is increased, the pressure of hydraulic oil in the vane slot 6 and the baffle slot 7 is reduced, the pressure of the hydraulic oil in the vane slot 6 and the baffle slot 7 is lower than that of the hydraulic oil in the cavity 2, so that the hydraulic oil in the cavity 2 can enable the first baffle 71 to slide towards the bottom of the baffle slot 7 along the baffle slot 7, the first baffle 71 retracts into the baffle slot 7, the first baffle 71 is prevented from obstructing the hydraulic oil from filling the space between the two vanes 62 when the hydraulic oil enters the cavity 2, and the first baffle 71 is prevented from occupying the space between the two vanes 62, thereby improving the implementation stability of the invention; the blades 62 drive the rotor 3 to rotate, so that the rotor 3 drives the output shaft 4 to rotate; the hydraulic oil in the vane slot 6 pushes the first baffle 71, so that the first baffle 71 drives the piston rod 75 and the second baffle 72 to slide together, and meanwhile, the hydraulic oil in the baffle slot 7 also pushes the piston 751, so that the piston 751 drives the piston rod 75 to slide in the first baffle 71 in the direction away from the bottom of the baffle slot 7; when the piston rod 75 slides, the piston 751 presses hydraulic oil in the step hole 74, so that the hydraulic oil flows into the baffle slot 7 through the return hole 77, and the situation that the piston rod 75 cannot move due to too high hydraulic oil pressure between the piston rod 75 and the first baffle 71 is prevented; the distance between the first baffle 71 and the second baffle 72 is increased under the action of the piston rod 75 until the second baffle 72 can contact with the outer side wall of the cavity 2; when the first spring 61 pushes the vane 62 to slide away from the bottom of the vane slot 6, the pressure of hydraulic oil in the vane slot 6 and the baffle slot 7 is reduced, so that the hydraulic oil in the cavity 2 can push the second baffle 72 and the piston rod 75 to slide along the baffle slot 7 towards the direction close to the bottom of the baffle slot 7; the hydraulic oil in the blade groove 6 pushes the first baffle 71 and the second baffle 72 to slide along the baffle groove 7 in the direction away from the bottom of the baffle groove 7, and meanwhile, the second spring 76 pushes the second baffle 72, so that the second baffle 72 can slide under the pushing of the second spring 76 and the piston rod 75, the moving speed of the second baffle 72 is increased, and the bubble intercepting efficiency is improved; when the first shutter 71 and the second shutter 72 slide along the shutter slot 7 toward the direction close to the bottom of the shutter slot 7, the second spring 76 is compressed by the first shutter 71 and the second shutter 72; the balls 722 on the second baffle 72 are in contact with the inner wall of the housing 1, sliding friction between the housing 1 and the second baffle is changed into rolling friction through the balls 722, the rotor 3 is prevented from driving the output shaft 4 to rotate due to overlarge friction force between the housing 1 and the second baffle 72, further the original using effect of the hydraulic motor is not influenced, the service life of the second baffle 72 is prolonged by reducing the friction force between the housing 1 and the second baffle 72, the first baffle 71 and the second baffle 72 are arranged on two sides of the blade 62, hydraulic oil in the cavity 2 pushes the rotating block 67 and the cutting piece 761, the rotating block 67, the second spring 76 and the cutting piece 761 simultaneously rotate around the piston rod 75, the cutting piece 761 can cut bubbles in the hydraulic oil when the hydraulic oil reaches a high-pressure zone, and then the bubbles are broken, the rotating block 67 can be pushed to rotate around the piston rod 75 when the hydraulic oil in the cavity 2 reaches the groove 671, meanwhile, the cutting disc 761 is pushed by hydraulic oil in the cavity 2 to be matched, so that the rotating speed of the rotating block 67 and the rotating speed of the cutting disc 761 are increased, the bubble cutting efficiency is improved, the practical application effect of the hydraulic motor is further improved, and the service life of the hydraulic motor is prolonged.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.