Two-way cartridge valve flow distribution radial piston hydraulic device controlled by rotating shaft and working method

Abstract

The present invention provides a shaft-controlled two-way cartridge valve distribution radial piston hydraulic device and a working method, comprising a housing, a main shaft rotatably arranged on the housing, a shaft rotatably arranged on the housing, a plurality of plunger assemblies, a first two-way cartridge valve corresponding to each of the plunger assemblies, and a second two-way cartridge valve corresponding to each of the plunger assemblies; the shaft-controlled two-way cartridge valve distribution radial piston hydraulic device adopts two-way cartridge valve distribution, providing a new distribution method, thanks to the excellent sealing and large valve port diameter advantages of the two-way cartridge valve, the device can be used in a high-pressure and large-flow environment; because the opening and closing of the valve port of the two-way cartridge valve can be modulated, compared with an ordinary one-way valve, the two-way cartridge valve can realize two-way conduction of oil, solving the limitation of valve distribution in the motor.

Description

Technical Field

[0001] The invention relates to the field of radial piston hydraulic devices, and in particular to a two-way cartridge valve flow distribution radial piston hydraulic device controlled by a rotating shaft and a working method. Background Art

[0002] Radial piston hydraulic devices are widely used in machinery manufacturing, mineral excavation, bridge and road construction, aerospace and other fields. The common radial piston hydraulic device oil hydraulic motors and hydraulic pumps on the market have the characteristics of low speed and high torque. The radial piston pump provides power for the hydraulic system by outputting oil with a certain pressure, and the radial piston motor outputs a certain torque and speed to the outside world, so that the actuator can do work on the outside world. The performance of the hydraulic motor and hydraulic pump directly affects the performance of the hydraulic system.

[0003] At present, there are three flow distribution methods for radial piston hydraulic devices: axial flow distribution method, end face flow distribution method, and valve flow distribution method. Among them, the axial flow distribution method and the end face flow distribution method can realize the state of the pump and the state of the motor. When the device inputs torque, it works in the state of the pump, and the device can output high-pressure fluid to the outside world; when the device inputs high-pressure fluid, it is in the state of the motor, and the device outputs torque and speed to the outside world. However, radial piston hydraulic devices using these two flow distribution methods have large gaps, and there is large wear between some structures that move against each other, which limits the working performance of the motor and pump to a certain extent.

[0004] Most of the radial piston hydraulic devices on the market that use valve distribution methods currently use ordinary one-way valves. However, since ordinary one-way valves can only allow one-way flow of fluid, they cannot be used in hydraulic motors, which to a certain extent limits the use of motors in radial piston hydraulic devices.

[0005] In view of this, this application is filed. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a shaft-controlled two-way cartridge valve distribution radial piston hydraulic device and a working method, aiming to solve the problem that most valve distribution type radial piston hydraulic devices in the prior art use ordinary one-way valves, so that the radial piston hydraulic device cannot be used as a hydraulic motor, which to a certain extent causes the motor application limitations of the radial piston hydraulic device.

[0007] The present invention provides a shaft-controlled two-way cartridge valve flow distribution radial plunger hydraulic device, comprising a housing, a main shaft rotatably arranged on the housing, a shaft rotatably arranged on the housing, a plurality of plunger assemblies, a first two-way cartridge valve corresponding to each of the plunger assemblies, and a second two-way cartridge valve corresponding to each of the plunger assemblies;

[0008] The housing is provided with a plurality of plunger cavities, a high-pressure oil circuit, and a low-pressure oil circuit corresponding to each plunger assembly, and each plunger assembly can slide up and down in the corresponding plunger cavity;

[0009] The main shaft is connected to each of the plunger assemblies, the rotating shaft is fixedly connected to the main shaft, and a control oil groove, a pressure relief oil groove, a first distribution ring groove and a second distribution ring groove are arranged on the outer periphery of the rotating shaft, the control oil groove is in communication with the high-pressure oil circuit, the pressure relief oil groove is in communication with the low-pressure oil circuit, the first distribution ring groove includes a first distribution upper half ring groove and a first distribution lower half ring groove, the second distribution ring groove includes a second distribution upper half ring groove and a second distribution lower half ring groove, the control oil groove is in communication with the first distribution lower half ring groove and the second distribution upper half ring groove, and the pressure relief oil groove is in communication with the first distribution upper half ring groove and the second distribution lower half ring groove;

[0010] Each of the first two-way cartridge valves includes a first one-way valve body, a first sliding valve core and a first sliding valve core elastic member, a first valve body control oil chamber, a first valve body high-pressure oil chamber and a first valve body low-pressure oil chamber are provided inside the first one-way valve body, the first sliding valve core is movably installed in the first one-way valve body and can control the on-off between the first valve body high-pressure oil chamber and the first valve body low-pressure oil chamber, the first valve body low-pressure oil chamber is connected to the corresponding plunger chamber, the first valve body high-pressure oil chamber is connected to the high-pressure oil circuit, and the first valve body control oil chamber is alternately connected to the first distribution upper half ring groove and the first distribution lower half ring groove;

[0011] Each of the second two-way cartridge valves includes a second one-way valve body, a second sliding valve core and a second sliding valve core elastic member. A second valve body control oil chamber, a second valve body high-pressure oil chamber and a second valve body low-pressure oil chamber are provided inside the second one-way valve body. The second sliding valve core is movably installed in the second one-way valve body and can control the on-off between the second valve body high-pressure oil chamber and the second valve body low-pressure oil chamber. The second valve body high-pressure oil chamber is connected to the corresponding plunger chamber, the second valve body low-pressure oil chamber is connected to the low-pressure oil circuit, and the second valve body control oil chamber is alternately connected to the second distribution upper semi-ring groove and the second distribution lower semi-ring groove.

[0012] Preferably, the rotating shaft is provided with a first connecting oil hole, a second connecting oil hole, a third connecting oil hole, and a fourth connecting oil hole, the first connecting oil hole connecting the pressure relief oil groove and the first distribution upper half ring groove, the second connecting oil hole connecting the pressure relief oil groove and the second distribution lower half ring groove, the third connecting oil hole connecting the control oil groove and the first distribution lower half ring groove, and the fourth connecting oil hole connecting the control oil groove and the second distribution upper half ring groove.

[0013] Preferably, the shell includes a shell body and a cover-type collector plate, the main shaft is rotatably arranged on the shell body, the plunger cavity is arranged on the outer periphery of the shell body, the cover-type collector plate is provided with a rotating shaft cavity, and the rotating shaft cavity passes through the cover-type collector plate.

[0014] Preferably, the high-pressure oil circuit includes a first high-pressure oil section and a second high-pressure oil section, and the low-pressure oil circuit includes a first low-pressure oil section and a second low-pressure oil section, the first high-pressure oil section and the first low-pressure oil section are arranged on the shell body, and the second high-pressure oil section and the second low-pressure oil section are arranged on the cover plate type manifold.

[0015] Preferably, the second high-pressure oil circuit section includes a high-pressure ring groove of a collector plate and a liquid resistance mounting hole, the high-pressure ring groove of the collector plate is arranged on the outer periphery of the cover plate collector plate, the liquid resistance mounting hole is arranged on the bottom wall of the high-pressure ring groove of the collector plate, and the liquid resistance mounting hole is connected to the control oil groove; the second low-pressure oil circuit section includes a low-pressure ring groove of a collector plate and a low-pressure flow hole, the low-pressure ring groove of the collector plate is arranged on the outer periphery of the cover plate collector plate, the low-pressure flow hole is arranged on the bottom wall of the low-pressure ring groove of the collector plate, and the low-pressure flow hole is connected to the pressure relief oil groove.

[0016] Preferably, the shell body is provided with a first high-pressure through hole and a first low-pressure through hole, the first high-pressure through hole is connected to the high-pressure ring groove of the confluence plate and the high-pressure oil chamber of the first valve body, and the first low-pressure through hole is connected to the low-pressure ring groove of the confluence plate and the low-pressure oil chamber of the second valve body; the cover plate type confluence plate is provided with a first oil control branch hole and a second oil control branch hole, one end of the first oil control branch hole is connected to the first valve body control oil chamber, and the other end of the first oil control branch hole corresponds to the first distribution ring groove, one end of the second oil control branch hole is connected to the second valve body control oil chamber, and the other end of the second oil control branch hole corresponds to the second distribution ring groove.

[0017] Preferably, a first movable chamber is provided in the first one-way valve body, the first sliding valve core is movably installed in the first movable chamber, the first sliding valve core elastic member is arranged in the first valve body control oil chamber, and the first sliding valve core elastic member is sandwiched between the first sliding valve core and the wall of the oil control chamber of the first valve body, the first sliding valve core can control the connection and disconnection of the high-pressure oil chamber of the first valve body and the low-pressure oil chamber of the first valve body, when the low-pressure oil passes through the first valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the first valve body can overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber, push open the first sliding valve core, and make the high-pressure oil chamber of the first valve body connected with the low-pressure oil chamber of the first valve body; when the high-pressure oil passes through the first valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the first valve body cannot overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber, and the high-pressure oil chamber of the first valve body is disconnected from the low-pressure oil chamber of the first valve body.

[0018] Preferably, a second active chamber is provided in the second one-way valve body, the second sliding valve core is movably installed in the second active chamber, the second sliding valve core elastic member is placed in the second valve body control oil chamber, and the second sliding valve core elastic member is clamped between the second sliding valve core and the wall of the oil control chamber of the second valve body, the second sliding valve core can control the connection and disconnection of the high-pressure oil chamber of the second valve body and the low-pressure oil chamber of the second valve body, when the low-pressure oil passes through the second valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the second valve body can overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber, push open the second sliding valve core, and make the high-pressure oil chamber of the second valve body connected with the low-pressure oil chamber of the second valve body; when the high-pressure oil passes through the second valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the second valve body cannot overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber, and the high-pressure oil chamber of the second valve body is disconnected from the low-pressure oil chamber of the second valve body.

[0019] Preferably, the main shaft comprises a first main shaft section, a second main shaft section, a third main shaft section and a fourth main shaft section which are connected in sequence and coaxially arranged, the end face of the first main shaft section is provided with a plug-in groove which is plugged into the rotating shaft to realize synchronous rotation of the rotating shaft and the main shaft; the second main shaft section is an eccentric cylinder, and a double-row full cylindrical roller bearing is installed on the periphery of the second main shaft section, and the double-row full cylindrical roller bearing is connected to the plunger assembly; the outer periphery of the third main shaft section is provided with a third main shaft section bearing, and the fourth main shaft section extends out of the housing.

[0020] Preferably, the plunger assembly includes a plunger, a plunger shoe and a plunger return ring. The plunger can slide up and down in the corresponding plunger cavity. The top end of the plunger shoe is sleeved in the plunger, the bottom end of the plunger shoe abuts against the outer ring of the double-row full cylindrical roller bearing, and the plunger return ring is sleeved on the bottom end of the plunger shoe.

[0021] The present invention also provides a working method of a rotary shaft-controlled two-way cartridge valve distribution radial plunger hydraulic device, which is applied to a rotary shaft-controlled two-way cartridge valve distribution radial plunger hydraulic device as described in any one of the above items, when the rotary shaft-controlled two-way cartridge valve distribution radial plunger hydraulic device is a hydraulic motor, the high-pressure oil circuit is connected to a pressure oil source, and the high-pressure oil circuit is an oil inlet channel, and the low-pressure oil circuit is an oil outlet channel;

[0022] When one of the plunger assemblies is in the upper top position, the corresponding first valve body control oil chamber is connected with the first distribution upper half ring groove, the corresponding second valve body control oil chamber is connected with the second distribution upper half groove, the first sliding valve core controls the first valve body high-pressure oil chamber to be connected with the first valve body low-pressure oil chamber, the second sliding valve core controls the second valve body high-pressure oil chamber to be disconnected from the second valve body low-pressure oil chamber, the high-pressure oil flows through the high-pressure oil circuit, the first valve body high-pressure oil chamber, the first valve body low-pressure oil chamber and then enters the corresponding plunger chamber, pushing the plunger to move downward, the plunger chamber volume increases, and drives the main shaft to move in a positive circular direction until the plunger assembly reaches the lower bottom position;

[0023] When the plunger assembly is in the lower bottom position, the main shaft and the rotating shaft both rotate 180 degrees in the positive direction, and the corresponding first valve body controls the oil chamber to be connected with the first distribution lower semi-annular groove, and the corresponding second valve body controls the oil chamber to be connected with the second distribution lower semi-annular groove. Then, the first sliding valve core controls the high-pressure oil chamber of the first valve body to be disconnected from the low-pressure oil chamber of the first valve body, and the second sliding valve core controls the high-pressure oil chamber of the second valve body to be connected with the low-pressure chamber. Under the thrust of other plunger assemblies and the inertia force of the main shaft, the plunger assembly moves upward, the volume of the plunger chamber decreases, and the oil in the plunger chamber passes through the high-pressure oil chamber of the second valve body and the low-pressure oil chamber of the second valve body and then flows out from the low-pressure oil circuit, thereby realizing the periodic motion of a single plunger assembly; the reciprocating motion of multiple plunger assemblies causes the main shaft to rotate continuously in the positive direction, thereby realizing the conversion of hydraulic energy into mechanical energy.

[0024] In summary, the present embodiment provides a shaft-controlled two-way cartridge valve distribution radial piston hydraulic device and a working method. The shaft-controlled two-way cartridge valve distribution radial piston hydraulic device adopts a two-way cartridge valve distribution, providing a new distribution method. Thanks to the excellent sealing and large valve port diameter of the two-way cartridge valve, the device can be used in a high-pressure and large-flow environment. Unlike an ordinary one-way valve that can only allow one-way flow of liquid, the opening and closing of the valve port of the two-way cartridge valve can be modulated, so the two-way cartridge valve can achieve two-way conduction of oil, so that the shaft-controlled two-way cartridge valve distribution radial piston hydraulic device can be used not only as a hydraulic pump, but also as a hydraulic motor. This solves the problem that most valve distribution radial piston hydraulic devices in the prior art use ordinary one-way valves, so that the radial piston hydraulic device cannot be used as a hydraulic motor, which to a certain extent causes the problem of motor application limitations of the radial piston hydraulic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the exploded structure of a two-way cartridge valve distribution radial piston hydraulic device controlled by a rotating shaft provided in an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the longitudinal cross-sectional structure of a two-way cartridge valve distribution radial piston hydraulic device controlled by a rotating shaft provided in an embodiment of the present invention.

[0027] Figure 3 It is a schematic diagram of the transverse cross-sectional structure of a two-way cartridge valve distribution radial piston hydraulic device controlled by a rotating shaft provided in an embodiment of the present invention.

[0028] Figure 4 It is a schematic top view of the structure of a two-way cartridge valve distribution radial piston hydraulic device controlled by a rotating shaft provided in an embodiment of the present invention.

[0029] Figure 5 It is a schematic diagram of the side structural analysis of the two-way cartridge valve distribution radial piston hydraulic device controlled by a rotating shaft provided in the first aspect of the present invention.

[0030] Figure 6 It is a schematic diagram of the side structural analysis of a two-way cartridge valve distribution radial piston hydraulic device controlled by a rotating shaft provided in the second aspect of the present invention.

[0031] Figure 7 It is a schematic diagram of the transverse cross-sectional structure of a two-way cartridge valve hole provided in an embodiment of the present invention.

[0032] Figure 8 It is a schematic side view of the structure of a cover plate type busbar provided in an embodiment of the present invention.

[0033] Fig. 9 It is a schematic cross-sectional structural diagram of the plunger gland provided in an embodiment of the present invention.

[0034] Fig.10 It is a schematic diagram of the left end structure of the main shaft provided in an embodiment of the present invention.

[0035] Fig.11 It is a schematic diagram of the side view structure of the main shaft provided by an embodiment of the present invention.

[0036] Fig.12 It is a schematic diagram of the side view structure of the rotating shaft provided by an embodiment of the present invention.

[0037] Fig.13 It is a schematic diagram of the side sectional structure of the rotating shaft provided by the first aspect of the present invention.

[0038] Fig.14 It is a schematic diagram of the side sectional structure of the rotating shaft provided by the second aspect of the present invention.

[0039] Fig.15 It is a schematic diagram of the side sectional structure of the rotating shaft provided by the third aspect of the present invention.

[0040] Fig.16 It is a schematic diagram of the side sectional structure of the rotating shaft provided by the fourth aspect of the present invention.

[0041] Fig.17It is a schematic cross-sectional structural diagram of a first two-way cartridge valve provided in an embodiment of the present invention.

[0042] Fig.18 It is a schematic diagram of the principle of the embodiment of the present invention when it is used as a hydraulic motor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0044] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0045] See also Figure 1 and Fig.17 The first embodiment of the present invention provides a shaft-controlled two-way cartridge valve distribution radial piston hydraulic device, comprising a housing 150, a main shaft 250 rotatably disposed on the housing 150, a shaft 350 rotatably disposed on the housing 150, a plurality of plunger assemblies, a first two-way cartridge valve 450 corresponding to each of the plunger assemblies, and a second two-way cartridge valve 550 corresponding to each of the plunger assemblies;

[0046] The housing 150 is provided with a plurality of plunger cavities 160, a high-pressure oil circuit, and a low-pressure oil circuit corresponding to each plunger assembly, and each plunger assembly can slide up and down in the corresponding plunger cavity 160;

[0047] The main shaft 250 is connected to each of the plunger assemblies, the rotating shaft 350 is fixedly connected to the main shaft 250, and the outer periphery of the rotating shaft 350 is provided with a control oil groove 370, a pressure relief oil groove 380, a first distribution ring groove and a second distribution ring groove, the control oil groove 370 is in communication with the high-pressure oil circuit, the pressure relief oil groove 380 is in communication with the low-pressure oil circuit, the first distribution ring groove includes a first distribution upper half ring groove 390 and a first distribution lower half ring groove 400, the second distribution ring groove includes a second distribution upper half ring groove 410 and a second distribution lower half ring groove 420, the control oil groove 370 is in communication with the first distribution lower half ring groove 400 and the second distribution upper half ring groove 410, and the pressure relief oil groove 380 is in communication with the first distribution upper half ring groove 390 and the second distribution lower half ring groove 420;

[0048] Each of the first two-way cartridge valves 450 includes a first one-way valve body 451, a first sliding valve core 453 and a first sliding valve core elastic member 458. The first one-way valve body 451 is provided with a first valve body control oil chamber 454, a first valve body high-pressure oil chamber 455 and a first valve body low-pressure oil chamber 456. The first sliding valve core 453 is movably installed in the first one-way valve body 451 and can control the on-off between the first valve body high-pressure oil chamber 455 and the first valve body low-pressure oil chamber 456. The first valve body low-pressure oil chamber 456 is connected to the corresponding plunger chamber, the first valve body high-pressure oil chamber 455 is connected to the high-pressure oil circuit, and the first valve body control oil chamber 454 is alternately connected to the first distribution upper semi-ring groove 390 and the first distribution lower semi-ring groove 400.

[0049] Each of the second two-way cartridge valves 550 includes a second one-way valve body 551, a second sliding valve core 553 and a second sliding valve core elastic member 558. The second one-way valve body 551 is provided with a second valve body control oil chamber 554, a second valve body high-pressure oil chamber 555 and a second valve body low-pressure oil chamber 556. The second sliding valve core 553 is movably installed in the second one-way valve body 551 and can control the connection and disconnection between the second valve body high-pressure oil chamber 555 and the second valve body low-pressure oil chamber 556. The second valve body high-pressure oil chamber 555 is connected to the corresponding plunger chamber, and the second valve body low-pressure oil chamber 556 is connected to the low-pressure oil circuit. The second valve body control oil chamber 554 is alternately connected to the second distribution upper semi-annular groove 410 and the second distribution lower semi-annular groove 420.

[0050] The common radial piston hydraulic device oil hydraulic motor and hydraulic pump on the market have the characteristics of low speed and high torque. The radial piston pump provides power for the hydraulic system by outputting oil with a certain pressure, and the radial piston motor outputs a certain torque and speed to the outside world, so that the actuator can do work on the outside world. The performance of the hydraulic motor and hydraulic pump directly affects the performance of the hydraulic system. At present, there are three flow distribution methods for radial piston hydraulic devices: axial flow distribution method, end face flow distribution method, and valve flow distribution method. Among them, the axial flow distribution method and the end face flow distribution method can realize the state of the pump and the state of the motor. When the device inputs torque, it works in the state of the pump, and the device can output high-pressure fluid to the outside world; when the device inputs high-pressure fluid, it is in the state of the motor, and the device outputs torque and speed to the outside world. However, there is a large gap in the radial piston hydraulic device using these two flow distribution methods, and there is a large wear between some structures that move with each other, which limits the working performance of the motor and pump to a certain extent.

[0051] Most of the radial piston hydraulic devices on the market that use valve distribution methods currently use ordinary one-way valves. However, since ordinary one-way valves can only allow one-way flow of fluid, they cannot be used in hydraulic motors, which to a certain extent limits the use of motors in radial piston hydraulic devices.

[0052] See also Figures 12 to 16 Specifically, in this embodiment, the working principle of the two-way cartridge valve is that when the high-pressure oil is introduced into the hydraulic control chamber, the valve port is closed, and when the low-pressure oil is introduced, the valve port can be opened under the action of the high-pressure chamber. The central axis of the housing 150 is M1M2, wherein the end close to M1 is the rear end of the housing 150, and the end close to M2 is the front end of the housing 150; the first two-way cartridge valve 450 and the second two-way cartridge valve 550 have the same structure. The control oil groove 370 is connected to the high-pressure oil circuit for oil intake, and the control oil groove 370 is also connected to the first distribution lower semi-annular groove 400 and the second distribution upper semi-annular groove 410, for providing control pressure when the first two-way cartridge valve 450 and the second two-way cartridge valve 550 need to be disconnected; the pressure relief oil groove 380 is connected to the low-pressure oil circuit, and the pressure relief oil groove 380 is also connected to the first distribution upper semi-annular groove 390 and the second distribution lower semi-annular groove 420; wherein, the first sliding valve core 453 is used to control the on-off between the first valve body high-pressure oil chamber 455 and the first valve body low-pressure oil chamber 456; the second sliding valve core 553 is used to control the on-off between the second valve body high-pressure oil chamber 555 and the second valve body low-pressure oil chamber 556.

[0053] See also Fig.18In this embodiment, when the shaft-controlled two-way cartridge valve distribution radial piston hydraulic device is a hydraulic motor, the high-pressure oil circuit is connected to the pressure oil source 11, and the high-pressure oil circuit is the oil inlet channel, and the low-pressure oil circuit is the oil outlet channel.

[0054] When the plunger assembly is in the upper top position, that is, the two-way cartridge valve distribution radial plunger hydraulic device controlled by the rotating shaft is in the oil inlet stage, at this time, the first valve body control oil chamber 454 is connected with the first distribution upper half ring groove 390, the second valve body control oil chamber 554 is connected with the second distribution upper half groove 410, the first sliding valve core 453 controls the first valve body high-pressure oil chamber 455 and the first valve body low-pressure oil chamber 456 to be connected, that is, the oil inlet is opened, and the second sliding valve core 553 controls the second valve body high-pressure oil chamber 555 and the second valve body low-pressure oil chamber 556 to be disconnected, that is, the oil outlet is closed; at this time, the high-pressure oil flows through the high-pressure oil circuit, the first valve body high-pressure oil chamber 455, and the first valve body low-pressure oil chamber 456 and then enters the corresponding plunger chamber 160, pushing the plunger assembly to move downward, the volume of the plunger chamber 160 increases, and drives the main shaft 250 to move in a positive circular direction until the plunger assembly reaches the lower bottom position. When the plunger assembly is in the lower bottom position, that is, the two-way cartridge valve distribution radial plunger hydraulic device controlled by the rotating shaft is in the oil discharge stage, at this time, the first valve body controls the oil chamber 454 to be connected with the first distribution lower half ring groove 400, the second valve body controls the oil chamber 554 to be connected with the second distribution lower half ring groove 420, the first sliding valve core 453 controls the first valve body high-pressure oil chamber 455 to be disconnected from the first valve body low-pressure oil chamber 456, that is, the oil inlet is closed, and the second sliding valve core 553 controls the second valve body high-pressure oil chamber 455 to be disconnected from the first valve body low-pressure oil chamber 456. The oil chamber 555 is connected to the low-pressure oil chamber 556 of the second valve body, that is, the oil outlet is opened; at this time, under the thrust of other plunger assemblies and the inertia force of the main shaft 250, the plunger assembly moves upward, the volume of the plunger chamber 160 decreases, and the oil in the plunger chamber 160 passes through the second valve body high-pressure oil chamber 555 and the second valve body low-pressure oil chamber 556 and then flows out from the low-pressure oil circuit, realizing the periodic motion of a single plunger assembly; the reciprocating motion of multiple plunger assemblies causes the main shaft to rotate continuously in the positive direction, realizing the conversion of hydraulic energy into mechanical energy.

[0055] In a possible embodiment of the present invention, the rotating shaft 350 is provided with a first connecting oil hole 430, a second connecting oil hole 431, a third connecting oil hole 440, and a fourth connecting oil hole 441, the first connecting oil hole 430 connects the pressure relief oil groove 380 and the first distribution upper semi-annular groove 390, the second connecting oil hole 431 connects the pressure relief oil groove 380 and the second distribution lower semi-annular groove 420, the third connecting oil hole 440 connects the control oil groove 370 and the first distribution lower semi-annular groove 400, and the fourth connecting oil hole 441 connects the control oil groove 370 and the second distribution upper semi-annular groove 410.

[0056] Specifically, in this embodiment, when the plunger assembly is in the upper top position, the first connecting oil hole 430 is connected to the pressure relief oil groove 380 and the first distribution upper half ring groove 390, so that the first valve body control oil chamber 454 of the first two-way cartridge valve 450 is connected to low-pressure oil, and the first valve body high-pressure oil chamber 455 is connected to the first valve body low-pressure oil chamber 456, and the fourth connecting oil hole 441 is connected to the control oil groove 370 and the second distribution upper half ring groove 410, so that the second valve body control oil chamber 554 of the second two-way cartridge valve 550 is connected to high-pressure oil, and the second valve body high-pressure oil chamber 555 is disconnected from the second valve body low-pressure oil chamber 556. Therefore, the oil in the high-pressure oil circuit flows into the plunger chamber 160 through the first two-way cartridge valve 450, pushing the plunger 650 to move.

[0057] When the plunger assembly is at the bottom position, the rotating shaft 350 rotates 180 degrees, the second connecting oil hole 431 communicates with the pressure relief oil groove 380 and the second distribution lower half ring groove 420, so that the second valve body control oil chamber 554 of the second two-way cartridge valve 550 is connected to low-pressure oil, and the second valve body high-pressure oil chamber 555 is connected to the second valve body low-pressure oil chamber 556, and the third connecting oil hole 440 communicates with the control oil groove 370 and the first distribution lower half ring groove 400, so that the first valve body control oil chamber 454 of the first two-way cartridge valve 450 is connected to high-pressure oil, and the first valve body high-pressure oil chamber 455 is disconnected from the first valve body low-pressure oil chamber 456. Thus, the oil in the plunger chamber 160 is discharged to the low-pressure oil circuit through the second two-way cartridge valve 550.

[0058] In a possible embodiment of the present invention, the shell 150 includes a shell body 180 and a cover-type collector plate 190, the main shaft 250 can be rotatably configured on the shell body 180, the plunger cavity 160 is arranged on the outer periphery of the shell body 180, and the cover-type collector plate 190 is provided with a rotating shaft cavity 170, and the rotating shaft cavity 170 passes through the cover-type collector plate 190.

[0059] The high-pressure oil circuit includes a first high-pressure oil section 181 and a second high-pressure oil section, and the low-pressure oil circuit includes a first low-pressure oil section 182 and a second low-pressure oil section. The first high-pressure oil section 181 and the first low-pressure oil section 182 are arranged on the shell body 180, and the second high-pressure oil section and the second low-pressure oil section are arranged on the cover plate type manifold 190.

[0060] Specifically, in this embodiment, the first high-pressure oil section 181 and the first low-pressure oil section 182 are arranged on the shell body 180, and are used for oil inlet and oil outlet, respectively. The second high-pressure oil section and the second low-pressure oil section are arranged on the cover plate type manifold 190, and are used for oil inlet and oil outlet, respectively. The first high-pressure oil section 181 is connected to the second high-pressure oil section, and the first low-pressure oil section 182 is connected to the second low-pressure oil section. The first high-pressure oil section 181 and the first low-pressure oil section both extend to the side of the shell body 180. The cover plate type manifold 190 is bolted to the M1 end face of the shell body 180, and the end cover 189 is bolted to the outer end face of the cover plate type manifold 190, and a deep groove ball bearing 1441 is installed between the end cover 189 and the rotating shaft 350. In order to ensure sufficient sealing, sealing rings 220 are provided between the rotating shaft 350 and the rotating shaft cavity 170 , between the cover plate type busbar 190 and the shell body 180 , and between the end cover 189 and the cover plate type busbar 190 .

[0061] See also Figures 4 to 6 as well as Figure 8 In this embodiment, the shell body 180 is pentagonal, and a plunger cover 183 is provided on each side. The plunger cover 183 and each side of the shell body 180 form a plunger cavity 160; that is, the shaft-controlled two-way cartridge valve distribution radial plunger hydraulic device is provided with five plunger cavities, so that the first two-way cartridge valve 450 and the second two-way cartridge valve 550 are each provided with five. Figure 7 As shown, the M1 end surface of the shell body 180 is provided with ten two-way cartridge valve holes 184, and the first two-way cartridge valve 450 and the second two-way cartridge valve 550 are respectively installed in the corresponding valve holes 184.

[0062] See also Figure 8In a possible embodiment of the present invention, the second high-pressure oil circuit section includes a high-pressure annular groove 191 of a confluence plate and a liquid resistance mounting hole 193, wherein the high-pressure annular groove 191 of the confluence plate is arranged on the outer periphery of the cover plate confluence plate 190, and the liquid resistance mounting hole 193 is arranged on the bottom wall of the high-pressure annular groove 191 of the confluence plate, and the liquid resistance mounting hole 193 is communicated with the control oil groove 370; the second low-pressure oil circuit section includes a low-pressure annular groove 192 of the confluence plate and a low-pressure flow hole 194, wherein the low-pressure annular groove 192 of the confluence plate is arranged on the outer periphery of the cover plate confluence plate 190, and the low-pressure flow hole 194 is arranged on the bottom wall of the low-pressure annular groove 192 of the confluence plate, and the low-pressure flow hole 194 is communicated with the pressure relief oil groove 380.

[0063] Specifically, in this embodiment, the high-pressure annular groove 191 of the confluence plate is connected to the control oil groove 370 through the liquid resistance mounting hole 193 of the bottom wall, so that the high-pressure oil can be transmitted from the high-pressure oil circuit to the control oil groove 370; the low-pressure annular groove 192 of the confluence plate is connected to the pressure relief oil groove 380 through the low-pressure flow hole 194 of the bottom wall, so that the oil can be transmitted from the low-pressure oil circuit to the pressure relief oil groove 380.

[0064] See also Figures 5 and 6 In a possible embodiment of the present invention, the shell body 180 is provided with a first high-pressure through hole 186 and a first low-pressure through hole 188, the first high-pressure through hole 186 is connected to the high-pressure ring groove 191 of the manifold and the first valve body high-pressure oil chamber 455, and the first low-pressure through hole 188 is connected to the low-pressure ring groove 192 of the manifold and the second valve body low-pressure oil chamber 556; the cover plate manifold 190 is provided with a first oil control branch hole 195 and a second oil control branch hole 196, one end of the first oil control branch hole 195 is connected to the first valve body control oil chamber 454, and the other end of the first oil control branch hole 195 corresponds to the first distribution ring groove, one end of the second oil control branch hole 196 is connected to the second valve body control oil chamber 554, and the other end of the second oil control branch hole 196 corresponds to the second distribution ring groove.

[0065] Specifically, in this embodiment, the cover plate type manifold 190 is connected to the first valve body control oil chamber 454 and the first distribution ring groove through the first oil control through hole 195, and the cover plate type manifold 190 is connected to the second valve body control oil chamber 554 and the second distribution ring groove through the second oil control through hole; the shell body 180 is connected to the first valve body high pressure oil chamber 455 and the manifold high pressure ring groove 191 through the first high pressure through hole 186; the shell body 180 is connected to the second valve body low pressure oil chamber 556 and the manifold low pressure ring groove 192 through the first low pressure through hole 188. In this way, the housing 150 is connected to the rotating shaft 350, the first two-way cartridge valve 450 and the second two-way cartridge valve 550.

[0066] In a possible embodiment of the present invention, a first movable cavity 457 is provided in the first one-way valve body 451, the first sliding valve core 453 is movably installed in the first movable cavity 457, the first sliding valve core elastic member 458 is arranged in the first valve body control oil cavity 454, and the first sliding valve core elastic member 458 is sandwiched between the first sliding valve core 453 and the cavity wall of the first valve body control oil cavity 454, and the first sliding valve core 453 can control the communication between the first valve body high-pressure oil cavity 455 and the first valve body low-pressure oil cavity 456 and disconnection. When the low-pressure oil passes through the first valve body control oil chamber 454, the high-pressure oil in the first valve body high-pressure oil chamber 455 can overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber 454, and push open the first sliding valve core 453, so that the first valve body high-pressure oil chamber 455 is connected with the first valve body low-pressure oil chamber 456; when the first valve body control oil chamber 454 passes through the high-pressure oil, the high-pressure oil in the first valve body high-pressure oil chamber 455 cannot overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber 454, and the first valve body high-pressure oil chamber 455 is disconnected from the first valve body low-pressure oil chamber 456.

[0067] The second one-way valve body 551 is provided with a second movable chamber 557, the second sliding valve core 553 is movably installed in the second movable chamber 557, the second sliding valve core elastic member 558 is placed in the second valve body control oil chamber 554, and the second sliding valve core elastic member 558 is sandwiched between the second sliding valve core 553 and the cavity wall of the second valve body control oil chamber 554, the second sliding valve core 553 can control the connection and disconnection of the second valve body high-pressure oil chamber 555 and the second valve body low-pressure oil chamber 556. When low-pressure oil passes through the valve body control oil chamber 554, the high-pressure oil in the second valve body high-pressure oil chamber 555 can overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber 554, push open the second sliding valve core 553, and connect the second valve body high-pressure oil chamber 555 with the second valve body low-pressure oil chamber 556; when high-pressure oil passes through the second valve body control oil chamber 554, the high-pressure oil in the second valve body high-pressure oil chamber 555 cannot overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber 554, and the second valve body high-pressure oil chamber 555 is disconnected from the second valve body low-pressure oil chamber 556.

[0068] Specifically, in the present embodiment, the first sliding valve core 453 can slide in the first active chamber 457, and the first sliding valve core 453 can control the connection and disconnection between the first valve body high-pressure oil chamber 455 and the first valve body low-pressure oil chamber 456. When the first valve body controls the oil chamber 454 to pass through low-pressure oil, the high-pressure oil in the first valve body high-pressure oil chamber 455 can overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber 454, and push open the first sliding valve core 453, so that the first valve body high-pressure oil chamber 455 is connected to the first valve body low-pressure oil chamber 456; when the first valve body controls the oil chamber 454 to pass through high-pressure oil, the high-pressure oil in the first valve body high-pressure oil chamber 455 cannot overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber 454, and the first valve body high-pressure oil chamber 455 is connected to the first valve body low-pressure oil chamber 456 is disconnected; the second sliding valve core 553 can slide in the second active chamber 557, and the second sliding valve core 553 can control the connection and disconnection of the second valve body high-pressure oil chamber 555 and the second valve body low-pressure oil chamber 556. When the second valve body controls the oil chamber 554 to pass through low-pressure oil, the high-pressure oil in the second valve body high-pressure oil chamber 555 can overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber 554, and push open the second sliding valve core 553, so that the second valve body high-pressure oil chamber 555 is connected with the second valve body low-pressure oil chamber 556; when the second valve body controls the oil chamber 554 to pass through high-pressure oil, the high-pressure oil in the second valve body high-pressure oil chamber 555 cannot overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber 554, and the second valve body high-pressure oil chamber 555 is disconnected from the second valve body low-pressure oil chamber 556.

[0069] See also Figure 10 to Figure 11 In a possible embodiment of the present invention, the main shaft 250 includes a first main shaft section 270, a second main shaft section 280, a third main shaft section 290, and a fourth main shaft section 300 which are connected in sequence and coaxially arranged. The end surface of the first main shaft section 270 is provided with a plug-in groove 271 which is mutually plugged with the rotating shaft 350 to realize the synchronous rotation of the rotating shaft 350 and the main shaft 250; the second main shaft section 280 is an eccentric cylinder, and a double-row full cylindrical roller bearing 260 is installed on the periphery of the second main shaft section 280, and the double-row full cylindrical roller bearing 260 is connected to the plunger assembly; the outer periphery of the third main shaft section 290 is provided with a third main shaft section bearing 291, and the fourth main shaft section 400 extends out of the housing 150.

[0070] See also Figures 2 to 3 The plunger assembly includes a plunger 650, a plunger shoe 660 and a plunger return ring 670. The plunger 650 can slide up and down in the corresponding plunger cavity 160. The top end of the plunger shoe 660 is sleeved in the plunger 650. The bottom end of the plunger shoe 660 abuts against the outer ring of the double-row full cylindrical roller bearing 260. The plunger return ring 670 is sleeved on the bottom end of the plunger shoe 660.

[0071] Specifically, in this embodiment, the plunger 650 is mounted in the plunger cavity 160 by sliding up and down, the ball head end of the plunger shoe 660 is rotatably sleeved in the plunger 650, the bottom end of the plunger shoe 660 is tightly against the outer ring of the double-row full cylindrical roller bearing 260 outside the main shaft 250, the plunger return ring 670 is sleeved on the bottom end of the plunger shoe 660, the sliding of the plunger 650 up and down in the plunger cavity can drive the rotation of the main shaft 250 through the plunger shoe 660 and the plunger return ring 670; the rotation of the main shaft 250 can drive the plunger 650 to slide up and down in the plunger cavity 160 through the plunger shoe 660 and the plunger return ring 670, and the structure of the plunger assembly is a conventional plunger structure. The main shaft 250 is rotatably mounted in the housing 150 and is transmission-connected to all the plunger assemblies. The main shaft 250 is rotatably mounted in the housing 150 and one end thereof extends out of the front end surface of the shell body 180 .

[0072] In this embodiment, the plunger return ring 670 is sleeved on the bottom end of the plunger sliding shoe 660. Figure 1 As shown, the first main shaft section 270 and the rotating shaft 350 are plugged into each other to achieve synchronous rotation of the rotating shaft 350, that is, the first main shaft section 270 is provided with a plug hole 271, and the rotating shaft 350 is provided with an insert block 360, and the insert block 360 and the plug hole 271 can cooperate with each other, and the second main shaft section 280 is equipped with a main shaft sleeve 281 at the front and rear. At the same time, the outer periphery of the first main shaft section 270 is provided with a first bearing 272. Figure 2 As shown, at the M2 end face of the housing 150, an end cover 200 is bolted to the housing body 180, the inner end face of the end cover 200 is against the second bearing 291, and the shaft end gland 210 is bolted to the outer end face of the end cover 200. In order to ensure the sealing performance, a sealing ring 220 is provided between the end cover 200 and the shaft end gland 210, between the end cover 200 and the housing body 180, and between the third shaft section 290 of the main shaft and the shaft end gland 210. Figure 5 As shown, the end cover 200 and the shaft end pressure cover 210 are both provided with oil drain holes 50 .

[0073] In this embodiment, the cover plate type collector plate 190 is bolted to the end face of the shell body 180M1, the end cover 189 is bolted to the outer end face of the cover plate type collector plate 190, and a deep groove ball bearing 1441 is installed between the end cover 189 and the rotating shaft 350. In order to ensure sufficient sealing, a sealing ring 220 is provided between the rotating shaft 350 and the rotating shaft cavity 170, between the cover plate type collector plate 190 and the shell body 180, and between the end cover 189 and the cover plate type collector plate 190.

[0074] A second embodiment of the present invention provides a working method of a rotary shaft-controlled two-way cartridge valve distribution radial plunger hydraulic device, which is applied to a rotary shaft-controlled two-way cartridge valve distribution radial plunger hydraulic device as described in any one of the above items, when the rotary shaft-controlled two-way cartridge valve distribution radial plunger hydraulic device is a hydraulic motor, the high-pressure oil circuit is connected to a pressure oil source 11, and the high-pressure oil circuit is an oil inlet channel, and the low-pressure oil circuit is an oil outlet channel;

[0075] When one of the plunger assemblies is in the upper top position, the corresponding first valve body control oil chamber is connected with the first distribution upper half ring groove, the corresponding second valve body control oil chamber is connected with the second distribution upper half groove, the first sliding valve core controls the first valve body high-pressure oil chamber to be connected with the first valve body low-pressure oil chamber, the second sliding valve core controls the second valve body high-pressure oil chamber to be disconnected from the second valve body low-pressure oil chamber, the high-pressure oil flows through the high-pressure oil circuit, the first valve body high-pressure oil chamber, the first valve body low-pressure oil chamber and then enters the corresponding plunger chamber, pushing the plunger to move downward, the plunger chamber volume increases, and drives the main shaft to move in a positive circular direction until the plunger assembly reaches the lower bottom position;

[0076] When the plunger assembly is in the lower bottom position, the main shaft and the rotating shaft both rotate 180 degrees in the positive direction, and the corresponding first valve body controls the oil chamber to be connected with the first distribution lower semi-annular groove, and the corresponding second valve body controls the oil chamber to be connected with the second distribution lower semi-annular groove. Then, the first sliding valve core controls the high-pressure oil chamber of the first valve body to be disconnected from the low-pressure oil chamber of the first valve body, and the second sliding valve core controls the high-pressure oil chamber of the second valve body to be connected with the low-pressure chamber. Under the thrust of other plunger assemblies and the inertia force of the main shaft, the plunger assembly moves upward, the volume of the plunger chamber decreases, and the oil in the plunger chamber passes through the high-pressure oil chamber of the second valve body and the low-pressure oil chamber of the second valve body and then flows out from the low-pressure oil circuit, thereby realizing the periodic motion of a single plunger assembly; the reciprocating motion of multiple plunger assemblies causes the main shaft to rotate continuously in the positive direction, thereby realizing the conversion of hydraulic energy into mechanical energy.

[0077] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A two-way cartridge valve with radial piston hydraulic device controlled by a rotating shaft, characterized in that: It comprises a housing, a main shaft rotatably arranged on the housing, a rotating shaft rotatably arranged on the housing, a plurality of plunger assemblies, a first two-way cartridge valve corresponding to each of the plunger assemblies, and a second two-way cartridge valve corresponding to each of the plunger assemblies; The housing is provided with a plurality of plunger cavities, a high-pressure oil circuit, and a low-pressure oil circuit corresponding to each plunger assembly, and each plunger assembly can slide up and down in the corresponding plunger cavity; The main shaft is connected to each of the plunger assemblies, the rotating shaft is fixedly connected to the main shaft, and a control oil groove, a pressure relief oil groove, a first distribution ring groove and a second distribution ring groove are arranged on the outer periphery of the rotating shaft, the control oil groove is in communication with the high-pressure oil circuit, the pressure relief oil groove is in communication with the low-pressure oil circuit, the first distribution ring groove includes a first distribution upper half ring groove and a first distribution lower half ring groove, the second distribution ring groove includes a second distribution upper half ring groove and a second distribution lower half ring groove, the control oil groove is in communication with the first distribution lower half ring groove and the second distribution upper half ring groove, and the pressure relief oil groove is in communication with the first distribution upper half ring groove and the second distribution lower half ring groove; Each of the first two-way cartridge valves includes a first one-way valve body, a first sliding valve core and a first sliding valve core elastic member, a first valve body control oil chamber, a first valve body high-pressure oil chamber and a first valve body low-pressure oil chamber are provided inside the first one-way valve body, the first sliding valve core is movably installed in the first one-way valve body and can control the on-off between the first valve body high-pressure oil chamber and the first valve body low-pressure oil chamber, the first valve body low-pressure oil chamber is connected to the corresponding plunger chamber, the first valve body high-pressure oil chamber is connected to the high-pressure oil circuit, and the first valve body control oil chamber is alternately connected to the first distribution upper half ring groove and the first distribution lower half ring groove; Each of the second two-way cartridge valves includes a second one-way valve body, a second sliding valve core and a second sliding valve core elastic member. A second valve body control oil chamber, a second valve body high-pressure oil chamber and a second valve body low-pressure oil chamber are provided inside the second one-way valve body. The second sliding valve core is movably installed in the second one-way valve body and can control the on-off between the second valve body high-pressure oil chamber and the second valve body low-pressure oil chamber. The second valve body high-pressure oil chamber is connected to the corresponding plunger chamber, the second valve body low-pressure oil chamber is connected to the low-pressure oil circuit, and the second valve body control oil chamber is alternately connected to the second distribution upper semi-ring groove and the second distribution lower semi-ring groove.

2. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 1, characterized in that: The rotating shaft is provided with a first connecting oil hole, a second connecting oil hole, a third connecting oil hole, and a fourth connecting oil hole. The first connecting oil hole is connected to the pressure relief oil groove and the first distribution upper half ring groove, the second connecting oil hole is connected to the pressure relief oil groove and the second distribution lower half ring groove, the third connecting oil hole is connected to the control oil groove and the first distribution lower half ring groove, and the fourth connecting oil hole is connected to the control oil groove and the second distribution upper half ring groove.

3. The shaft-controlled two-way cartridge valve distribution radial piston hydraulic device according to claim 1, characterized in that: The shell includes a shell body and a cover-type collector plate. The main shaft is rotatably arranged on the shell body. The plunger cavity is arranged on the outer periphery of the shell body. The cover-type collector plate is provided with a rotating shaft cavity, and the rotating shaft cavity passes through the cover-type collector plate.

4. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 3, characterized in that: The high-pressure oil circuit includes a first high-pressure oil section and a second high-pressure oil section, and the low-pressure oil circuit includes a first low-pressure oil section and a second low-pressure oil section. The first high-pressure oil section and the first low-pressure oil section are arranged on the shell body, and the second high-pressure oil section and the second low-pressure oil section are arranged on the cover plate type manifold.

5. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 4, characterized in that: The second high-pressure oil circuit section includes a high-pressure ring groove of a collector plate and a liquid resistance mounting hole, wherein the high-pressure ring groove of the collector plate is arranged at the outer periphery of the cover plate collector plate, the liquid resistance mounting hole is arranged at the bottom wall of the high-pressure ring groove of the collector plate, and the liquid resistance mounting hole is connected to the control oil groove; the second low-pressure oil circuit section includes a low-pressure ring groove of a collector plate and a low-pressure flow hole, wherein the low-pressure ring groove of the collector plate is arranged at the outer periphery of the cover plate collector plate, the low-pressure flow hole is arranged at the bottom wall of the low-pressure ring groove of the collector plate, and the low-pressure flow hole is connected to the pressure relief oil groove.

6. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 5, characterized in that: The shell body is provided with a first high-pressure through hole and a first low-pressure through hole, the first high-pressure through hole is connected with the high-pressure ring groove of the confluence plate and the high-pressure oil chamber of the first valve body, and the first low-pressure through hole is connected with the low-pressure ring groove of the confluence plate and the low-pressure oil chamber of the second valve body; the cover plate type confluence plate is provided with a first oil control branch hole and a second oil control branch hole, one end of the first oil control branch hole is connected with the first valve body control oil chamber, and the other end of the first oil control branch hole corresponds to the first distribution ring groove, one end of the second oil control branch hole is connected with the second valve body control oil chamber, and the other end of the second oil control branch hole corresponds to the second distribution ring groove.

7. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 1, characterized in that: A first movable chamber is provided in the first one-way valve body, and the first sliding valve core is movably installed in the first movable chamber. The first sliding valve core elastic member is arranged in the first valve body control oil chamber, and the first sliding valve core elastic member is clamped between the first sliding valve core and the wall of the oil control chamber of the first valve body. The first sliding valve core can control the connection and disconnection of the high-pressure oil chamber of the first valve body and the low-pressure oil chamber of the first valve body. When the low-pressure oil passes through the first valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the first valve body can overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber, and push open the first sliding valve core, so that the high-pressure oil chamber of the first valve body is connected with the low-pressure oil chamber of the first valve body; when the high-pressure oil passes through the first valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the first valve body cannot overcome the resistance of the spring and the liquid pressure of the first valve body control oil chamber, and the high-pressure oil chamber of the first valve body is disconnected from the low-pressure oil chamber of the first valve body.

8. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 1, characterized in that: A second active chamber is provided in the second one-way valve body, and the second sliding valve core is movably installed in the second active chamber. The second sliding valve core elastic member is placed in the second valve body control oil chamber, and the second sliding valve core elastic member is clamped between the second sliding valve core and the wall of the oil control chamber of the second valve body. The second sliding valve core can control the connection and disconnection of the high-pressure oil chamber of the second valve body and the low-pressure oil chamber of the second valve body. When the low-pressure oil passes through the second valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the second valve body can overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber, and push open the second sliding valve core, so that the high-pressure oil chamber of the second valve body is connected with the low-pressure oil chamber of the second valve body; when the high-pressure oil passes through the second valve body control oil chamber, the high-pressure oil in the high-pressure oil chamber of the second valve body cannot overcome the resistance of the spring and the liquid pressure of the second valve body control oil chamber, and the high-pressure oil chamber of the second valve body is disconnected from the low-pressure oil chamber of the second valve body.

9. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 1, characterized in that: The main shaft includes a first main shaft section, a second main shaft section, a third main shaft section, and a fourth main shaft section that are connected in sequence and coaxially arranged. The end surface of the first main shaft section is provided with a plug-in groove that is mutually plugged with the rotating shaft to achieve synchronous rotation of the rotating shaft and the main shaft; the second main shaft section is an eccentric cylinder, and a double-row full cylindrical roller bearing is installed on the periphery of the second main shaft section, and the double-row full cylindrical roller bearing is connected to the plunger assembly; the outer periphery of the third main shaft section is provided with a third main shaft section bearing, and the fourth main shaft section extends out of the housing.

10. The shaft-controlled two-way cartridge valve flow distribution radial piston hydraulic device according to claim 9, characterized in that: The plunger assembly includes a plunger, a plunger shoe and a plunger return ring. The plunger can slide up and down in the corresponding plunger cavity. The top end of the plunger shoe is sleeved in the plunger, the bottom end of the plunger shoe abuts against the outer ring of the double-row full cylindrical roller bearing, and the plunger return ring is sleeved on the bottom end of the plunger shoe.

11. A working method of a rotary shaft-controlled two-way cartridge valve-distributed radial piston hydraulic device, which is applied to a rotary shaft-controlled two-way cartridge valve-distributed radial piston hydraulic device as claimed in any one of claims 1 to 10, characterized in that: When the shaft-controlled two-way cartridge valve distribution radial piston hydraulic device is a hydraulic motor, the high-pressure oil circuit is connected to the pressure oil source, and the high-pressure oil circuit is an oil inlet channel, and the low-pressure oil circuit is an oil outlet channel: When one of the plunger assemblies is in the upper top position, the corresponding first valve body control oil chamber is connected with the first distribution upper half ring groove, the corresponding second valve body control oil chamber is connected with the second distribution upper half groove, the first sliding valve core controls the first valve body high-pressure oil chamber to be connected with the first valve body low-pressure oil chamber, the second sliding valve core controls the second valve body high-pressure oil chamber to be disconnected from the second valve body low-pressure oil chamber, the high-pressure oil flows through the high-pressure oil circuit, the first valve body high-pressure oil chamber, the first valve body low-pressure oil chamber and then enters the corresponding plunger chamber, pushing the plunger to move downward, the plunger chamber volume increases, and drives the main shaft to move in a positive circular direction until the plunger assembly reaches the lower bottom position; When the plunger assembly is in the lower bottom position, the main shaft and the rotating shaft both rotate 180 degrees in the positive direction, and the corresponding first valve body controls the oil chamber to be connected with the first distribution lower semi-annular groove, and the corresponding second valve body controls the oil chamber to be connected with the second distribution lower semi-annular groove. Then, the first sliding valve core controls the high-pressure oil chamber of the first valve body to be disconnected from the low-pressure oil chamber of the first valve body, and the second sliding valve core controls the high-pressure oil chamber of the second valve body to be connected with the low-pressure chamber. Under the thrust of other plunger assemblies and the inertia force of the main shaft, the plunger assembly moves upward, the volume of the plunger chamber decreases, and the oil in the plunger chamber passes through the high-pressure oil chamber of the second valve body and the low-pressure oil chamber of the second valve body and then flows out from the low-pressure oil circuit, thereby realizing the periodic motion of a single plunger assembly; the reciprocating motion of multiple plunger assemblies causes the main shaft to rotate continuously in the positive direction, thereby realizing the conversion of hydraulic energy into mechanical energy.

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