Radial plunger pump capable of adjusting oil pumping quantity

Abstract

The invention relates to a radial plunger pump capable of adjusting oil pumping quantity, and relates to the technical field of hydraulic pumps, the radial plunger pump comprises a shell and hydraulic cylinders, a plurality of hydraulic cylinders are uniformly installed on the shell, plungers are installed in the hydraulic cylinders, a limiting device is installed on the side wall of the shell, an input shaft is installed on the limiting device, and the input shaft is installed on the shell. The limiting device is used for adjusting the position of the input shaft in the radial direction of the side wall of the shell, one end of the input shaft penetrates through the limiting device and extends into the shell, a universal connecting mechanism is arranged at the end, not installed in the shell, of the input shaft, and the input shaft is connected with the motor through the universal connecting mechanism. The hydraulic cylinder is provided with an oil inlet and an oil return port, the oil distributor is provided with an oil inlet pipe and an oil return pipe, the oil inlet pipe is connected with the oil inlet, the oil return pipe is connected with the oil return port, a first oil stop valve is installed in the oil inlet, and a second oil stop valve is installed in the oil return port. The method has the effect of realizing variable control on the oil pumping quantity of the plunger pump.

Description

Technical Field

[0001] The present application relates to the field of hydraulic pump technology, and in particular to a radial piston pump with adjustable pump oil volume. Background Art

[0002] With the rapid development of modern industry, mechanical equipment has higher and higher requirements for work efficiency and reliability. As one of the core components of fluid transmission systems, radial piston pumps are widely used in many industries due to their high pressure and large flow.

[0003] An existing radial piston pump is usually provided with an input shaft and an eccentric wheel. The input shaft is connected to the eccentric wheel, and the input shaft drives the eccentric wheel to rotate. The rotation of the eccentric wheel squeezes multiple plungers to make reciprocating motion in the wall to absorb and discharge oil.

[0004] However, since the input shaft and the eccentric wheel are fixedly arranged, the rotation radius of the eccentric wheel is always displaced, so that the reciprocating distance of the plunger in the hydraulic cylinder is constant, and variable control of the oil pumping amount of the plunger pump cannot be used. Summary of the invention

[0005] In order to achieve variable control of the oil pumping volume of a plunger pump, the present application provides a radial piston pump with adjustable oil pumping volume.

[0006] The radial piston pump with adjustable pump oil volume provided in the present application adopts the following technical solution: A radial piston pump with adjustable pump oil volume comprises a housing and a hydraulic cylinder, wherein a plurality of the hydraulic cylinders are evenly mounted on the housing, a plunger is mounted in the hydraulic cylinder, a limiting device is mounted on the side wall of the housing, the input shaft is mounted on the limiting device, the limiting device is used to radially adjust the position of the input shaft along the side wall of the housing, and one end of the input shaft passes through the limiting device and extends into the housing, a universal connection mechanism is arranged at the end of the input shaft not mounted in the housing, the input shaft is connected to a motor through the universal connection mechanism, an oil distributor is mounted at the rear end of the housing, an oil inlet and an oil return port are arranged on the hydraulic cylinder, an oil inlet pipe and an oil return pipe are arranged on the oil distributor, the oil inlet pipe is connected to the oil inlet, the oil return pipe is connected to the oil return port, a first oil stop valve is mounted in the oil inlet, and a second oil stop valve is mounted in the oil return port.

[0007] By adopting the above technical solution, by installing a limit device on the side wall of the shell, the input shaft can be adjusted radially along the side wall of the shell, thereby realizing variable control of the oil pumping amount of the plunger pump, and improving the adaptability and flexibility of the equipment; the input shaft is connected to the motor through a universal joint mechanism, so that the input shaft can stably transmit power at different angles, thereby enhancing the reliability of the equipment and reducing the wear caused by vibration or angle changes; the oil inlet and oil return ports arranged on the hydraulic cylinder are connected to the oil inlet pipe and oil return pipe on the oil distributor, ensuring the smooth flow of oil, effectively preventing oil blockage and leakage, and improving the operating efficiency of the system; the first oil stop valve and the second oil stop valve respectively installed in the oil inlet and the oil return port can effectively prevent the oil from flowing back, thereby ensuring the safety and stability of the system and extending the service life of the equipment.

[0008] In a specific feasible implementation scheme, the limit device includes an input shaft, an adjusting block, a turntable, and a limit screw, the adjusting block is rotatably connected to the side wall of the shell and extends to be set in the shell, the turntable is installed at one end in the shell, the adjusting block is arranged in the shell and has an adjusting block slot, the extrusion disk is provided with an extrusion disk slider, a turntable slot is provided on the turntable corresponding to the adjusting block slot, the extrusion disk slider passes through the turntable slot and is slidably connected in the adjusting block slot, the limit screw is rotatably connected to the side wall of the limit block at one end outside the shell and extends into the adjusting block slot, the adjusting screw is drivingly connected to the extrusion disk slider, the adjusting screw is provided with a scale line, the scale line is arranged along the height direction of the adjusting screw, the position of the extrusion disk slider is judged by the scale line, and the input shaft is installed at the end where the limit block is located outside the shell.

[0009] By adopting the above technical solution, the limit device can achieve precise adjustment of the position of the extrusion disk, so that the plunger pump can flexibly adjust the pump oil volume under different working conditions, improving the adaptability and flexibility of the equipment. At the same time, through the drive connection between the limit screw and the extrusion disk slider, the radial movement of the extrusion disk can be accurately controlled to ensure that the plunger pump remains stable during operation, reduce wear caused by mechanical vibration, and extend the service life of the equipment. In addition, the rotating connection design of the adjustment block makes the adjustment operation more convenient and improves maintenance efficiency.

[0010] In a specific possible implementation manner, the adjustment block is configured to be columnar, and the adjustment block slide groove is radially opened along the end surface of the adjustment block.

[0011] By adopting the above technical solution, the adjustment block is set to be columnar, and the adjustment block slot is opened radially along the end surface of the adjustment block, so that the position of the extrusion disk can be accurately adjusted, ensuring that the pumping oil volume of the plunger pump under different working conditions is effectively controlled, and the pumping oil efficiency and reliability are improved. At the same time, the design of the columnar adjustment block makes the adjustment process more stable, reduces the mechanical wear caused by the adjustment, and prolongs the service life of the equipment.

[0012] In a specific feasible implementation scheme, the universal connection mechanism includes a connecting rod, a telescopic rod, a limit block and a universal ball. There are four limit blocks, which are respectively installed at one end of the connecting rod, both ends of the telescopic rod and an end of the input shaft outside the shell. There are two universal balls, which are respectively located between the connecting rod and the telescopic rod and between the telescopic rod and the input shaft. A cross groove is provided on the universal ball. The limit blocks installed on the connecting rod and the telescopic rod are vertically arranged in the cross groove on one of the universal balls, and the limit blocks installed on the telescopic rod and the input shaft are vertically arranged in the cross groove on the other universal ball. The limit blocks are slidably connected in the cross groove.

[0013] By adopting the above technical solution, the design of the universal connection mechanism enables the input shaft to be connected to the motor at different angles, increasing the degree of freedom of the input shaft and improving the adaptability and flexibility of the equipment. At the same time, the cooperation of the limit block and the universal ball ensures the stability and reliability of the connection, avoiding the problem of loose connection or failure caused by angle changes. In addition, this design can also effectively reduce vibration and impact, reduce the degree of wear of the equipment, and extend the service life.

[0014] In a specific possible implementation scheme, the telescopic rod includes a first rod body and a second rod body, a rod body slot is provided at one end of the first rod body, one end of the second rod body is slidably connected in the rod body slot, the second rod body is slidably connected in the rod body slot and a rod body spline is provided on the outer wall at one end, a rod body limiting slot is provided in the rod body slot, and the cylinder body spline is slidably connected in the rod body limiting slot.

[0015] By adopting the above technical solution, the design of the telescopic rod enables the input shaft to be stably connected at different positions, ensuring the connection reliability between the input shaft and the motor. At the same time, the sliding connection design between the first rod body and the second rod body, combined with the rod body spline and the rod body limit groove, can effectively prevent the telescopic rod from twisting or falling out during movement, thereby improving the stability and reliability of the system. In addition, this design can also absorb and buffer the vibration and impact caused by the change of the input shaft position to a certain extent, further reducing the wear of the equipment and extending its service life.

[0016] In a specific feasible implementation scheme, the first oil stop valve includes an oil stop ring, an oil stop spring, and an oil stop plug, the oil stop ring being installed at the upper opening of the oil inlet, the oil stop plug being slidably connected in the oil inlet, one end of the oil stop spring being connected to the end of the oil stop plug facing away from the oil stop ring, and the other end of the oil stop spring being connected to the side wall of the lower end of the oil inlet, the second oil stop valve being arranged with the same structure as the first oil stop valve, and the second oil stop valve being installed in the oil return port in the opposite installation form of the first oil stop valve.

[0017] By adopting the above technical solution, the first oil stop valve and the second oil stop valve can effectively prevent the hydraulic oil from flowing back in the non-working state, ensuring the stability and reliability of the system. Specifically, the oil stop ring is installed at the opening of the upper end of the oil inlet, the oil stop plug is slidably connected in the oil inlet, one end of the oil stop spring is connected to the end of the oil stop plug away from the oil stop ring, and the other end of the oil stop spring is connected to the side wall of the lower end of the oil inlet. This structure allows the oil stop plug to be pushed open when the hydraulic oil enters the oil inlet, and the hydraulic oil enters the hydraulic cylinder smoothly; when the hydraulic oil stops flowing or flows in the reverse direction, the oil stop spring pushes the oil stop plug to be close to the oil stop ring to prevent the hydraulic oil from flowing back. Similarly, the second oil stop valve is installed in the return oil port in the opposite installation form, playing the same oil stopping role, further improving the safety and efficiency of the entire system.

[0018] In a specific possible implementation scheme, the oil stop ring is chamfered adjacent to one end of the oil stop plug, the upper end of the oil stop plug is chamfered corresponding to the oil stop ring, and the maximum outer diameter of the oil stop plug is larger than the maximum inner diameter of the oil stop ring.

[0019] By adopting the above technical solution, the chamfer design between the oil stop ring and the oil stop plug allows the oil stop plug to enter the oil stop ring more smoothly when closed, reducing the friction between the two and improving the response speed and sealing performance of the oil stop plug. At the same time, the maximum outer diameter of the oil stop plug is greater than the maximum inner diameter of the oil stop ring, ensuring that the oil stop plug can completely block the oil inlet or oil return port in the closed state, preventing oil leakage and improving the reliability of the system.

[0020] In a specific possible implementation scheme, an oil passage groove is provided on the outer side wall of the oil stop plug, and a plurality of the oil passage grooves are provided, and the plurality of the oil passage grooves are evenly provided on the circumferential portion of the side wall of the oil stop plug.

[0021] By adopting the above technical solution, the several oil passage grooves arranged on the outer wall of the oil stop plug can temporarily store some oil through the oil passage grooves when the oil stop plug is closed. When the oil stop plug is opened, the oil can be quickly replenished into the hydraulic cylinder, reducing the delay of oil supply and improving the working efficiency of the pump. At the same time, the setting of the oil passage groove can also reduce the friction between the oil stop plug and the oil inlet, reduce wear and extend the service life.

[0022] In a specific implementation manner, a front sealing cover is detachably connected to one end of the housing away from the oil distributor, and a rear sealing cover is detachably connected to one end of the housing close to the oil distributor.

[0023] By adopting the above technical solution, the detachable connection design of the front sealing cover and the rear sealing cover makes maintenance and overhaul more convenient and quick, and the internal components can be replaced or repaired without disassembling the entire pump body, thereby improving the reliability and service life of the equipment. At the same time, this design can also effectively prevent foreign impurities from entering the pump body, reduce wear, and improve the working efficiency and stability of the pump.

[0024] In a specific possible implementation mode, a cylinder head is fixedly connected to the hydraulic cylinder, and a sealing gasket is sealed between the hydraulic cylinder and the cylinder head.

[0025] By adopting the above technical solution, the sealed connection between the hydraulic cylinder and the cylinder head can effectively prevent liquid leakage and improve the reliability of the system. At the same time, the fixedly connected cylinder head enhances the stability of the entire structure, reduces wear caused by vibration, and prolongs the service life of the equipment.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The position of the input shaft is adjusted by the limit device, which realizes the variable control of the oil volume of the plunger pump and improves the adaptability and flexibility of the pump under different working conditions; 2. The introduction of the universal connection mechanism effectively reduces the mechanical stress caused by the change of the input shaft position, reduces wear and tear, and extends the service life of the equipment; 3. The design of the first oil stop valve and the second oil stop valve ensures the smooth flow of the fluid and the stability of the system, prevents the occurrence of oil leakage, and improves the overall reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0028] Figure 2 It is a left view of the embodiment of the present application.

[0029] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0030] Figure 4 It is a schematic diagram of the structure of the limiting device.

[0031] Figure 5 A cross-sectional view showing the connection relationship between the limit device and the extrusion disk.

[0032] Figure 6 This is a structural schematic diagram of the universal connection mechanism of an embodiment of the present application.

[0033] Figure 7 It is a fracture cross-sectional view showing the installation positions of the first oil stop pump and the second oil stop pump.

[0034] Description of the reference numerals: 1, housing; 11, front sealing cover; 12, rear sealing cover; 2, hydraulic cylinder; 21, oil inlet; 22, oil return port; 3, plunger; 4, limit device; 41, input shaft; 42, adjustment block; 421, adjustment block slide; 43, turntable; 431, turntable slide; 44, limit screw; 5, universal connection mechanism; 51, connecting rod; 52, telescopic rod; 521, first rod body; 5211, rod body slide groove; 5212, rod body limit groove; 522, second rod body; 5221, rod body spline; 53, limit block; 54, universal ball; 541, cross slide groove; 6, oil distributor; 61, oil inlet pipe; 62, oil return pipe; 7, first oil stop valve; 71, oil stop ring; 72, oil stop spring; 73, oil stop plug; 731, oil groove; 8, second oil stop valve; 9, cylinder head; 10, extrusion plate; 101, extrusion plate slider. DETAILED DESCRIPTION

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0037] The embodiment of the present application discloses a radial piston pump with adjustable pump oil volume.

[0038] like Figure 1 and Figure 2As shown, the overload-proof and low-wear radial piston 3 pump includes a housing 1 and a hydraulic cylinder 2, and a plurality of hydraulic cylinders 2 are evenly mounted on the housing 1. It is characterized in that it also includes a limit device 4 and an extrusion plate 10, a plunger 3 is mounted in the hydraulic cylinder 2, the plunger 3 is slidably connected in the hydraulic cylinder 2, and a roller is provided at one end of the plunger 3 adjacent to the extrusion plate 10, and is sealed and connected to the side wall of the hydraulic cylinder 2, a limit spring is installed in the hydraulic cylinder 2, one end of the limit spring is connected to the inner side wall of the hydraulic cylinder 2, and the other end of the limit spring is connected to the plunger 3, the limit device 4 is mounted on the side wall of the housing 1, and the extrusion plate 10 is mounted in the housing 1 through the limit device 4, and the limit device 4 is used to move along The side wall of the shell 1 radially adjusts the position of the extrusion disk 10, and a universal connection mechanism 5 is provided on the limit device 4, and the limit device 4 is connected to the motor through the universal connection mechanism 5. An oil distributor 6 is installed at the rear end of the shell 1, and an oil inlet 21 and an oil return port 22 are provided on the hydraulic cylinder 2. An oil inlet pipe 61 and an oil return pipe 62 are provided on the oil distributor 6. The oil inlet pipe 61 is connected to the oil inlet 21, and the oil return pipe 62 is connected to the oil return port 22. A first oil stop valve 7 is installed in the oil inlet 21, and a second oil stop valve 8 is installed in the oil return port 22.

[0039] The end of the housing 1 away from the oil distributor 6 is detachably connected to a front sealing plate, and the end of the housing 1 close to the oil distributor 6 is detachably connected to a rear sealing plate. The front sealing plate and the rear sealing plate can be made of metal materials, such as stainless steel or aluminum alloy, to improve sealing and corrosion resistance. The front sealing plate and the rear sealing plate can be fixed to the housing 1 by bolts, which is convenient for disassembly and maintenance.

[0040] The hydraulic cylinder 2 is fixedly connected with a cylinder head 9, and a sealing gasket is sealed between the hydraulic cylinder 2 and the cylinder head 9. The cylinder head 9 can be made of metal materials, such as cast iron or aluminum alloy, to improve rigidity and pressure resistance. The sealing gasket can be made of rubber or silicone material to achieve a good sealing effect. The cylinder head 9 and the hydraulic cylinder 2 can be fixed by bolts to ensure the stability of the connection.

[0041] like Figure 3 and Figure 5As shown, the limit device 4 includes an input shaft 41, an adjustment block 42, a rotary disk 43, and a limit screw 44. The adjustment block 42 is rotatably connected to the side wall of the housing 1 and extends to the housing 1. The rotary disk 43 is installed at one end in the housing 1, and the adjustment block 42 is set in the housing 1 and has an adjustment block 42 slide groove. The extrusion disk 10 is correspondingly provided with an extrusion disk 10 slide groove. The extrusion disk 10 is provided with an extrusion disk slider 101. The extrusion disk slider 101 passes through the extrusion disk 10 slide groove and is slidably connected in the adjustment block 42 slide groove. The limit screw 44 is rotatably connected to the side wall of the limit block 53 located at one end outside the housing 1 and extends to the adjustment block 42 slide groove. The adjustment screw is driven and connected to the extrusion disk slider 101. The adjustment rod is provided with a scale line, and the scale line is set along the length direction of the adjustment screw, so that the oil volume of the adjustment pump can be judged by observing the height of the adjustment rod. The input shaft 41 is installed at the limit block 53 located at one end outside the housing 1. The input shaft 41 can be made of a standard motor shaft or a customized high-strength alloy steel shaft to ensure its stability and durability during high-speed operation. The adjustment block 42 can be made of high-strength aluminum alloy or stainless steel to ensure its anti-fatigue performance during long-term use. The turntable 43 can be made of cast iron or engineering plastics, which has good wear resistance and shock absorption performance. The limit screw 44 can be a precision-machined stainless steel screw to ensure its accuracy during fine adjustment.

[0042] like Figure 6 As shown, the universal connection mechanism 5 includes a connecting rod 51, a telescopic rod 52, a stopper 53 and a universal ball 54. Four stopper blocks 53 are provided, and the four stopper blocks 53 are respectively installed at one end of the connecting rod 51, both ends of the telescopic rod 52 and one end of the input shaft 41 located outside the housing 1. Two universal balls 54 are provided, and the two universal balls 54 are respectively located between the connecting rod 51 and the telescopic rod 52 and between the telescopic rod 52 and the input shaft 41. A cross groove 541 is provided on the universal ball 54. The stopper blocks 53 installed on the connecting rod 51 and the telescopic rod 52 are vertically arranged in the cross groove 541 on one universal ball 54, and the stopper blocks 53 installed on the telescopic rod 52 and the input shaft 41 are vertically arranged in the cross groove 541 on the other universal ball 54. The stopper blocks 53 are slidably connected in the cross groove 541. The connecting rod 51 and the telescopic rod 52 can be made of high-strength alloy steel to increase strength and durability. The universal ball 54 may be made of ceramic material to reduce wear and improve precision. The limit block 53 may be fixed to the connecting rod 51, the telescopic rod 52 and the input shaft 41 by welding or threading to ensure the stability of the connection.

[0043] The design of the universal connection mechanism 5 enables the input shaft 41 to be connected to the motor at different angles, increasing the degree of freedom of the input shaft 41 and improving the adaptability and flexibility of the device. At the same time, the cooperation of the limit block 53 and the universal ball 54 ensures the stability and reliability of the connection, avoiding the problem of loose connection or failure caused by angle changes. In addition, this design can also effectively reduce vibration and impact, reduce the degree of wear of the equipment, and extend the service life.

[0044] The telescopic rod 52 includes a first rod body 521 and a second rod body 522. A rod body slot 5211 is provided at one end of the first rod body 521. One end of the second rod body 522 is slidably connected in the rod body slot 5211. A rod body spline 5221 is provided on the outer wall of one end of the second rod body 522 which is slidably connected in the rod body slot 5211. A rod body limiting groove 5212 is provided in the rod body slot 5211. The rod body spline 5221 is slidably connected in the rod body limiting groove 5212. The design of the rod body slot 5211 and the rod body limiting groove 5212 can ensure the linear motion of the telescopic rod 52 and avoid jamming and deflection. The rod body spline 5221 can adopt a trapezoidal spline to increase the contact area and the ability to transmit torque.

[0045] The design of the telescopic rod 52 enables the input shaft 41 to be stably connected at different positions, ensuring the reliability of the connection between the input shaft 41 and the motor. At the same time, the sliding connection design between the first rod body 521 and the second rod body 522, combined with the rod body spline 5221 and the rod body limit groove 5212, can effectively prevent the telescopic rod 52 from twisting or falling out during movement, thereby improving the stability and reliability of the system. In addition, this design can also absorb and buffer the vibration and impact caused by the change in the position of the input shaft 41 to a certain extent, further reducing the wear of the equipment and extending the service life.

[0046] like Figure 7As shown, the first oil stop valve 7 includes an oil stop ring 71, an oil stop spring 72, and an oil stop plug 73. The oil stop ring 71 is installed at the upper opening of the oil inlet 21, and the oil stop plug 73 is slidably connected in the oil inlet 21. One end of the oil stop spring 72 is connected to the end of the oil stop plug 73 away from the oil stop ring 71, and the other end of the oil stop spring 72 is connected to the side wall of the lower end of the oil inlet 21. The oil stop ring 71 can be made of hard alloy material to improve wear resistance and pressure resistance. The oil stop plug 73 can be made of rubber or plastic material to achieve a good sealing effect. The oil stop spring 72 can be selected from a highly elastic stainless steel spring to ensure the rapid response and reliability of the oil stop plug 73. The oil stop ring 71 is chamfered at one end adjacent to the oil stop plug 73, and the upper end of the oil stop plug 73 corresponds to the chamfer of the oil stop ring 71. The maximum outer diameter of the oil stop plug 73 is greater than the maximum inner diameter of the oil stop ring 71, which can effectively prevent the oil stop plug 73 from being pushed out by high-pressure oil. An oil groove 731 is provided on the outer side wall of the oil stop plug 73. A plurality of oil grooves 731 are provided. The plurality of oil grooves 731 are evenly provided on the circumferential portion of the side wall of the oil stop plug 73 to ensure uniform distribution and flow of the oil. The second oil stop valve 8 is provided with the same structure as the first oil stop valve 7. The second oil stop valve 8 is installed in the oil return port 22 in the opposite installation form of the first oil stop valve 7.

[0047] The implementation principle of an overload-proof and low-wear radial piston 3 pump in the embodiment of the present application is as follows: through the design of the limit device 4 and the universal connection mechanism 5, the position of the input shaft 41 is flexibly adjusted, thereby changing the reciprocating distance of the piston 3 in the hydraulic cylinder 2, and achieving the effect of variable control. The use of sealing plates and sealing rings improves the sealing and reliability of the pump. The design of the universal ball 54 and the limit block 53 ensures the smooth movement of the input shaft 41, reduces wear and failure rate. The design of the oil stop valve effectively prevents oil leakage and ensures efficient operation of the pump. The detachable connection between the front sealing plate and the rear sealing plate facilitates maintenance and overhaul. The use of the cylinder head 9 and the sealing gasket ensures the sealing and safety of the hydraulic cylinder 2. In general, this embodiment effectively solves the problems existing in the traditional radial piston 3 pump, improves the adaptability and flexibility of the pump, and meets the needs of modern industry for efficient and reliable equipment.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A radial piston pump with adjustable pump oil volume, comprising a housing (1) and a hydraulic cylinder (2), wherein a plurality of the hydraulic cylinders (2) are evenly mounted on the housing (1), characterized in that: The hydraulic cylinder (2) further comprises a limit device (4) and an extrusion plate (10), wherein a plunger (3) is installed in the hydraulic cylinder (2), the limit device (4) is installed on the side wall of the housing (1), the extrusion plate (10) is installed in the housing (1) through the limit device (4), the limit device (4) is used to radially adjust the position of the extrusion plate (10) along the side wall of the housing (1), and the limit device (4) is provided with a universal connection mechanism (5), and the limit device (4) is connected to the housing (1) by the universal connection mechanism. The structure (5) is connected to the motor, the rear end of the housing (1) is equipped with an oil distributor (6), the hydraulic cylinder (2) is provided with an oil inlet (21) and an oil return port (22), the oil distributor (6) is provided with an oil inlet pipe (61) and an oil return pipe (62), the oil inlet pipe (61) is connected to the oil inlet (21), the oil return pipe (62) is connected to the oil return port (22), a first oil stop valve (7) is installed in the oil inlet (21), and a second oil stop valve (8) is installed in the oil return port (22).

2. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: The limiting device (4) comprises an input shaft (41), an adjusting block (42), a rotating disk (43), and a limiting screw (44); the adjusting block (42) is rotatably connected to the side wall of the housing (1) and extends to be arranged inside the housing (1); the rotating disk (43) is installed at one end inside the housing (1); the adjusting block (42) is arranged inside the housing (1) and is provided with an adjusting block slide groove (421); the extrusion disk (10) is provided with an extrusion disk (10) slider; the rotating disk (43) is provided with a rotating disk slide groove (431) corresponding to the adjusting block slide groove (421); the extrusion disk ( 10) The slider passes through the turntable slot (431) and is slidably connected in the adjusting block slot (421); the limit screw (44) is rotatably connected to the side wall of the limit block (53) located at one end outside the shell (1) and extends into the adjusting block slot (421); the adjusting screw is drivingly connected to the slider of the extrusion disk (10); a scale line is provided on the adjusting screw, and the scale line is arranged along the height direction of the adjusting screw. The position of the slider of the extrusion disk (10) is judged by the scale line; the input shaft (41) is installed at one end of the limit block (53) located outside the shell (1).

3. The radial piston pump with adjustable pump oil volume according to claim 2, characterized in that: The adjusting block (42) is configured to be columnar, and the adjusting block sliding groove (421) is radially opened along the end surface of the adjusting block (42).

4. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: The universal connection mechanism (5) comprises a connecting rod (51), a telescopic rod (52), a limit block (53) and a universal ball (54). Four limit blocks (53) are provided, and the four limit blocks (53) are respectively installed at one end of the connecting rod (51), at both ends of the telescopic rod (52) and at one end of the input shaft (41) located outside the housing (1). Two universal balls (54) are provided, and the two universal balls (54) are respectively located between the connecting rod (51) and the telescopic rod (52) and at one end of the telescopic rod (52). A cross groove (541) is provided on the universal ball (54) between the connecting rod (51) and the input shaft (41); a limit block (53) installed on the connecting rod (51) and the telescopic rod (52) is vertically arranged in the cross groove (541) on one of the universal balls (54); a limit block (53) installed on the telescopic rod (52) and the input shaft (41) is vertically arranged in the cross groove (541) on the other universal ball (54); and the limit block (53) is slidably connected in the cross groove (541).

5. The radial piston pump with adjustable pump oil volume according to claim 4, characterized in that: The telescopic rod (52) comprises a first rod body (521) and a second rod body (522); a rod body sliding groove (5211) is provided at one end of the first rod body (521); one end of the second rod body (522) is slidably connected in the rod body sliding groove (5211); a rod body spline (5221) is provided on the outer side wall of one end of the second rod body (522) slidably connected in the rod body sliding groove (5211); a rod body limiting groove (5212) is provided in the rod body sliding groove (5211); and the cylinder body spline is slidably connected in the rod body limiting groove (5212).

6. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: The first oil stop valve (7) comprises an oil stop ring (71), an oil stop spring (72), and an oil stop plug (73); the oil stop ring (71) is installed at the upper opening of the oil inlet (21); the oil stop plug (73) is slidably connected in the oil inlet (21); one end of the oil stop spring (72) is connected to the end of the oil stop plug (73) facing away from the oil stop ring (71); the other end of the oil stop spring (72) is connected to the lower side wall of the oil inlet (21); the second oil stop valve (8) is arranged with the same structure as the first oil stop valve (7); the second oil stop valve (8) is installed in the oil return port (22) in the opposite installation form of the first oil stop valve (7).

7. The radial piston pump with adjustable pump oil volume according to claim 6, characterized in that: The oil stop ring (71) is chamfered at one end adjacent to the oil stop plug (73), the upper end of the oil stop plug (73) is chamfered corresponding to the oil stop ring (71), and the maximum outer diameter of the oil stop plug (73) is greater than the maximum inner diameter of the oil stop ring (71).

8. The radial piston pump with adjustable pump oil volume according to claim 6, characterized in that: An oil passage groove (731) is provided on the outer side wall of the oil stop plug (73), and a plurality of the oil passage grooves (731) are provided. The plurality of the oil passage grooves (731) are evenly provided on the circumferential portion of the side wall of the oil stop plug (73).

9. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: The end of the housing (1) away from the oil distributor (6) is detachably connected to a front sealing cover (11), and the end of the housing (1) close to the oil distributor (6) is detachably connected to a rear sealing cover (12).

10. The radial piston pump with adjustable pump oil volume according to claim 1, characterized in that: A cylinder cover (9) is fixedly connected to the hydraulic cylinder (2), and a sealing gasket is sealed between the hydraulic cylinder (2) and the cylinder cover (9).

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