CN113669320A

CN113669320A - End face controlled hydraulic control one-way valve flow distribution radial plunger hydraulic device and working method

Info

Publication number: CN113669320A
Application number: CN202110925909.8A
Authority: CN
Inventors: 郭桐; 罗涛; 林添良; 陈其怀; 任好玲; 缪骋; 付胜杰
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-11-19
Anticipated expiration: 2041-08-12
Also published as: CN113669320B

Abstract

The invention discloses a flow distribution radial plunger hydraulic device of a hydraulic control one-way valve controlled by an end face and a working method. The main shaft of the hydraulic device is easy to manufacture and has good anti-leakage measures. And, adopt the pilot operated check valve to join in marriage a class, can work steadily under the high pressure operating mode, let out leakage quantity little.

Description

End face controlled hydraulic control one-way valve flow distribution radial plunger hydraulic device and working method

Technical Field

The invention relates to an end face controlled hydraulic control one-way valve flow distribution radial plunger hydraulic device and a working method.

Background

The radial plunger hydraulic device such as a hydraulic motor and a hydraulic pump has the working characteristics of low speed and large torque, and is widely applied to the fields of injection molding machines, engineering machinery and the like. Radial piston hydraulic pumps are a type of hydraulic power device used to provide oil under pressure to a hydraulic system. Radial piston hydraulic motors are a common type of hydraulic actuator used to drive a working mechanism to rotate at a certain speed. The output power of the hydraulic pump or the hydraulic motor depends on the working pressure and flow rate, and the higher the working pressure is, the higher the output power is, and a larger load can be driven.

The flow distribution mode adopted by the existing radial plunger hydraulic device mainly comprises the following steps: three types of flow distribution are realized through a shaft, an end face and a one-way valve. The device adopting shaft flow distribution and end surface flow distribution can work in a pump state and a motor state respectively, namely when torque is input by the transmission shaft, the device can work in the pump state and pump high-pressure fluid outwards; when high-pressure fluid is input into the device, the device can work in a motor state, and torque is output outwards through the transmission shaft. However, the above two flow distribution structures have gaps, and the intermittence gradually increases with the wear of the kinematic pair, so that the increase of the working pressure is limited. The check valve has good sealing performance, can be used for a radial plunger hydraulic pump, realizes high pressure and ultrahigh pressure, but the common check valve only allows one-way flow, so the check valve cannot be used for distributing flow for a radial plunger hydraulic motor, and the radial plunger hydraulic device can only work in a pump state.

In summary, the existing axial flow distribution and end flow distribution have become one of the key factors limiting the radial plunger devices such as hydraulic motors and hydraulic pumps to increase the working pressure.

Disclosure of Invention

The invention provides an end face controlled hydraulic control one-way valve flow distribution radial plunger hydraulic device and a working method, which overcome the defects in the prior art. One of the technical schemes adopted by the invention for solving the technical problems is as follows:

the end face controlled hydraulic control one-way valve flow distribution radial plunger hydraulic device comprises a shell, a plurality of plunger assemblies, a main shaft, a confluence disc, a flow distribution disc, first hydraulic control one-way valves with the same number as the plunger assemblies and in one-to-one correspondence with the plunger assemblies, and second hydraulic control one-way valves with the same number as the plunger assemblies and in one-to-one correspondence with the plunger assemblies;

the shell is provided with a plurality of plunger piston cavities, a plurality of first valve cavities, a plurality of second valve cavities, an assembly cavity, a high-pressure oil way and a low-pressure oil way;

each plunger assembly can slide up and down in the corresponding plunger cavity;

the main shaft is rotatably connected to the shell and is in transmission connection with all the plunger assemblies;

the confluence disc is fixedly connected in the assembly cavity, the periphery of the confluence disc is provided with a first annular groove and a second annular groove which are respectively communicated with the high-pressure oil path and the low-pressure oil path, and the end surface of the confluence disc is also provided with a flow distribution cavity;

the flow distribution disc is rotatably arranged in the flow distribution cavity and is in transmission connection with the main shaft, and the flow distribution disc is provided with a high-pressure flow distribution groove which can be communicated with the high-pressure oil path and a low-pressure flow distribution groove which can be communicated with the low-pressure oil path;

each first hydraulic control one-way valve comprises a first one-way valve body and a first one-way valve core, the first one-way valve body is arranged in the first valve cavity and is provided with a first valve body hydraulic control cavity, a first valve body high-pressure cavity and a first valve body low-pressure cavity, the first one-way valve core is movably connected in the first one-way valve body and can control the connection and disconnection between the first valve body high-pressure cavity and the first valve body low-pressure cavity, the first valve body low-pressure cavity is communicated with the corresponding plunger cavity, the first valve body high-pressure cavity is communicated with the first annular groove, and the first valve body hydraulic control cavity is alternately communicated with the high-pressure flow distribution groove and the low-pressure flow distribution groove;

each second hydraulic control one-way valve comprises a second one-way valve body and a second one-way valve core, the second one-way valve body is installed in the second valve cavity and provided with a second valve body oil control cavity, a second valve body high-pressure cavity and a second valve body low-pressure cavity, the second one-way valve core is movably installed in the second one-way valve body and can control the connection and disconnection between the second valve body high-pressure cavity and the second valve body low-pressure cavity, the second valve body high-pressure cavity is communicated with the corresponding plunger cavity, the second valve body low-pressure cavity is communicated with the second annular groove, and the second valve body oil control cavity is alternately communicated with the high-pressure flow distribution groove and the low-pressure flow distribution groove.

In a preferred embodiment: the bottom wall of the distributing cavity is provided with a plurality of first confluence holes which are arranged at intervals in an annular mode and communicated with the first valve body oil control cavity and a plurality of second confluence holes which are arranged at intervals in an annular mode and communicated with the second valve body oil control cavity, the first confluence holes and the second confluence holes are arranged in a concentric mode, and the first confluence holes are located in the inner ring of the second confluence holes; the flow distribution plate back leans on to support at the flow distribution chamber diapire just high-pressure distribution groove and low-pressure distribution groove all are located the flow distribution plate back, and first flow convergence hole and second flow convergence hole can be respectively with high-pressure distribution groove, the low-pressure distribution groove switch-on in turn.

In a preferred embodiment: the two high-pressure distribution grooves are respectively a high-pressure inner distribution groove and a high-pressure outer distribution groove, the two low-pressure distribution grooves are respectively arc-shaped, the two high-pressure distribution grooves are respectively a low-pressure inner distribution groove and a low-pressure outer distribution groove, the high-pressure inner distribution groove and the low-pressure inner distribution groove are located on the same circumference and are symmetrically arranged, and the high-pressure outer distribution groove and the low-pressure outer distribution groove are located on the same circumference and are symmetrically arranged; the first confluence hole corresponds to the circumference of the high-pressure inner flow distribution groove; the second confluence hole corresponds to the circumference of the high-pressure outer flow distribution groove.

In a preferred embodiment: the front surface of the valve plate is provided with two high-pressure shunting holes which are respectively communicated with the two high-pressure valve grooves, and the side surface of the valve plate is provided with two low-pressure shunting holes which are respectively communicated with the two low-pressure valve grooves; the end face of the shell is also provided with a first control high-pressure port communicated with the two high-pressure shunting holes, and the peripheral surface of the confluence disc is also provided with a second control low-pressure port communicated with the two low-pressure shunting holes.

In a preferred embodiment: the first confluence hole and the second confluence hole extend to the peripheral surface of the confluence disc; the shell is further provided with a first control oil hole communicated with the first valve body oil control cavity and a second control oil hole communicated with the second valve body oil control cavity, the first control oil hole is communicated with the first confluence hole, and the second control oil hole is communicated with the second confluence hole.

In a preferred embodiment: the wear-resistant gasket is clamped between the valve plate and the bottom wall of the valve cavity, and a pin is additionally arranged and used for fixing the valve plate, the wear-resistant gasket and the bottom wall of the valve cavity together; the wear-resisting gasket is equipped with the first via hole with first via hole one-to-one and with the second via hole one-to-one of second converge the hole.

In a preferred embodiment: the shell comprises a shell body and a first shell end cover, the plunger cavity, the first valve cavity, the second valve cavity, the assembling cavity, the high-pressure oil way and the low-pressure oil way are all arranged on the shell body, the assembling cavity is positioned on one end face of the shell body, the confluence disc is provided with a confluence disc boss, the confluence disc extends into the assembling cavity, the confluence disc boss abuts against the end face of the shell body, the flow distribution cavity is arranged at the confluence disc boss, the flow distribution disc is flush with the end face of the confluence disc boss, and the first shell end cover presses against the flow distribution disc and the confluence disc boss and is fixedly connected with the shell body; the first control high-pressure port is arranged in the center of the first shell end cover.

In a preferred embodiment: the main shaft comprises a main shaft body and a rotating shaft, the main shaft body is rotatably installed in the shell body and extends out of the other end face of the shell body, and the plunger assembly is in transmission connection with the main shaft body; the center of the confluence disc is provided with a rotating shaft hole, the rotating shaft penetrates through the rotating shaft hole, and two ends of the rotating shaft are respectively connected with the main shaft body and the valve plate.

In a preferred embodiment: the main shaft body comprises a first main shaft section, a second main shaft section, a third main shaft section and a fourth main shaft section which are sequentially connected, and the first main shaft section is in inserted fit with the rotating shaft so as to drive the rotating shaft to synchronously rotate; the second main shaft section is eccentric and the periphery of the second main shaft section is provided with a double-row full cylindrical roller bearing, and the outer ring of the double-row full cylindrical roller bearing is connected with the plunger assembly; a third main shaft section bearing is arranged on the periphery of the third main shaft section, and the fourth main shaft section extends out of the shell body; the plunger assembly comprises a plunger, a plunger sliding shoe and a plunger return ring, the plunger is connected in a plunger cavity in an up-and-down sliding manner, the top end of the plunger sliding shoe is sleeved in the plunger, the bottom end of the plunger sliding shoe abuts against the outer ring of the double-row full cylindrical roller bearing, the plunger return ring is sleeved at the bottom end of the plunger sliding shoe, and the plunger can slide up and down in the plunger cavity to drive the main shaft body to rotate through the plunger sliding shoe and the return ring; alternatively, the main shaft body can rotate to drive the plunger to slide up and down in the plunger cavity through the plunger sliding shoe and the return ring.

In a preferred embodiment: the first one-way valve body is provided with a first movable cavity, the first one-way valve core comprises a first valve core column, a first valve core block and a second valve core block, the first valve core block and the second valve core block are fixedly connected to two ends of the first valve core column respectively, the first valve core column is movably sleeved in the first movable cavity and can drive the first valve core block and the second valve core block to synchronously move, the first valve core block is positioned in the first valve body oil control cavity and divides the first valve body oil control cavity into two independent first valve body oil control sub-cavities, the second valve core block is positioned in the first valve body high-pressure cavity and can move between the opening of the first valve body high-pressure cavity and the closing of the first valve body high-pressure cavity, and a first valve core elastic element is additionally arranged and is clamped between the first valve core block and the wall of the first valve body oil control cavity; the second one-way valve body is provided with a second movable cavity, the second one-way valve core comprises a second valve core column, a third valve core block and a fourth valve core block, the third valve core block and the fourth valve core block are fixedly connected to two ends of the second valve core column respectively, the second valve core column is movably sleeved in the second movable cavity and can drive the third valve core block and the fourth valve core block to move synchronously, the third valve core block is located in the second valve body oil control cavity and divides the second valve body oil control cavity into two independent second valve body oil control sub-cavities, the fourth valve core block is located in the second valve body high-pressure cavity and can move between the opening of the second valve body high-pressure cavity and the closing of the second valve body high-pressure cavity, and a second valve core elastic element is additionally arranged and clamped between the third valve core block and the wall of the second valve body oil control cavity.

The second technical scheme adopted by the invention for solving the technical problems is as follows:

the working method of the end surface controlled hydraulic control check valve flow distribution radial plunger hydraulic device, which applies the end surface controlled hydraulic control check valve flow distribution radial plunger hydraulic device, comprises the following steps:

when this radial plunger hydraulic means is hydraulic motor, the high-pressure oil circuit links to each other with the pressure oil source and the high-pressure oil circuit is the oil feed passageway, and the low pressure oil circuit is the passageway that produces oil:

when one plunger assembly is positioned at the upper top position, the corresponding first valve body oil control cavity is communicated with the high-pressure flow distribution groove, the corresponding second valve body oil control cavity is communicated with the low-pressure flow distribution groove, the first one-way valve core controls the first valve body high-pressure cavity to be communicated with the first valve body low-pressure cavity, the second one-way valve core controls the second valve body high-pressure cavity to be disconnected with the second valve body low-pressure cavity, high-pressure oil flows through the high-pressure oil way, the first ring groove, the first valve body high-pressure cavity and the first valve body low-pressure cavity and then enters the corresponding plunger cavity to push the plunger to move downwards, the volume of the plunger cavity is increased, and the main shaft is driven to do forward circular motion until the plunger assembly reaches the lower bottom position;

when the plunger assembly is positioned at the lower bottom position, the spindle rotates forwards by 180 degrees, the corresponding first valve body oil control cavity is communicated with the low-pressure flow distribution groove, the corresponding second valve body oil control cavity is communicated with the high-pressure flow distribution groove, the first one-way valve core controls the first valve body high-pressure cavity to be disconnected with the first valve body low-pressure cavity, the second one-way valve core controls the second valve body high-pressure cavity to be communicated with the second valve body low-pressure cavity, the plunger assembly moves upwards under the action of thrust of other plunger assemblies and the inertia force of the spindle, the volume of the plunger cavity is reduced, oil in the plunger cavity flows out of the low-pressure oil way after passing through the second valve body high-pressure cavity, the second valve body low-pressure cavity and the second ring groove, and the periodic motion of a single plunger assembly is realized;

the reciprocating motion of a plurality of plunger assemblies makes the main shaft continuously rotate in the positive direction, and the hydraulic energy is converted into mechanical energy.

The third technical scheme adopted by the invention for solving the technical problems is as follows:

when this radial plunger hydraulic means is the hydraulic pump, the high-pressure oil circuit links to each other and the high-pressure oil circuit is an oil outlet channel with high-pressure oil tank or hydraulic load, and the low-pressure oil circuit links to each other and the low-pressure oil circuit is the oil feed passageway with the low-pressure oil tank:

the main shaft rotates reversely to drive at least one plunger assembly to move downwards from an upper top position, the volume of a corresponding plunger cavity is increased to generate vacuum, the pressure in the plunger cavity is lower than that of a low-pressure oil tank, at the moment, a second valve body oil control cavity is communicated with a high-pressure flow distribution groove, and a second one-way valve core controls a second valve body high-pressure cavity to be communicated with a second valve body low-pressure cavity; the first valve body oil control cavity is communicated with the low-pressure distribution groove, the first one-way valve core controls the first valve body high-pressure cavity to be disconnected with the first valve body low-pressure cavity, oil in the low-pressure oil tank flows through the low-pressure oil way, the second ring groove, the second valve body low-pressure cavity and the second valve body high-pressure cavity to enter the plunger cavity until the plunger assembly moves to the lower bottom position, and at the moment, the main shaft drives the rotating shaft to rotate reversely by 180 degrees;

the main shaft continues to rotate reversely by 180 degrees, the plunger assembly starts to move upwards, the volume of a corresponding plunger cavity is reduced, the pressure is increased, and the pressure is higher than the pressure of a high-pressure oil tank or a hydraulic load, at the moment, a first valve body oil control cavity is communicated with a high-pressure flow distribution groove, and a first one-way valve core controls a first valve body high-pressure cavity to be communicated with a first valve body low-pressure cavity; the second valve body oil control cavity is communicated with the low-pressure flow distribution groove, the second one-way valve core controls the second valve body high-pressure cavity to be disconnected with the second valve body low-pressure cavity, and oil in the plunger cavity flows through the first valve body low-pressure cavity, the first valve body high-pressure cavity and the first ring groove and then enters a high-pressure oil tank or a hydraulic load part to realize oil discharge movement of the plunger assembly;

a plurality of plunger subassembly is driven under the reverse rotation of main shaft, and each plunger chamber inhales low pressure fluid to form pressure oil and discharge, realize that mechanical energy converts hydraulic energy into.

Compared with the background technology, the technical scheme has the following advantages:

1. compact structure and simple transmission. The main shaft of the hydraulic device is easy to manufacture and has good anti-leakage measures.

2. The hydraulic control one-way valve is adopted for flow distribution, the hydraulic control one-way valve can stably work under a high-pressure working condition, and the leakage amount is small.

3. The hydraulic control one-way valve does not need to be controlled by an external hydraulic source, and the flow and liquid connection is simple and convenient.

4. The distribution pressure can be adjusted, and the distribution pressure is adjusted by the hydraulic resistance.

5. Reliable support and stable operation. The main shaft is reliably supported and not easy to deform, so that the main shaft rotates more stably.

6. The flow distribution pair has less friction, stable work and long service life.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic exploded view of a pilot operated check valve flow distribution radial plunger hydraulic device with a controlled end surface according to a preferred embodiment.

Fig. 2 is an exploded view of the spindle and plunger assembly.

FIG. 3 shows a longitudinal cross-sectional view of the face controlled pilot operated check valve port radial piston hydraulic device of a preferred embodiment.

FIG. 4 is a transverse cross-sectional view of the face-controlled pilot operated check valve port radial piston hydraulic device of a preferred embodiment.

Fig. 5 shows a cross-sectional view a-a of fig. 4.

Fig. 6 shows a cross-sectional view B-B of fig. 4.

Fig. 7 shows a schematic top view of the radial piston hydraulic device.

Fig. 8 illustrates a cross-sectional view C-C of fig. 7.

Fig. 9 shows a cross-sectional view D-D of fig. 7.

Fig. 10 shows a schematic top view of the housing body.

Fig. 11 depicts a cross-sectional schematic view of the housing body.

Fig. 12 depicts a side view schematic of a housing body.

Fig. 13 is a schematic bottom view of the housing body.

FIG. 14-1 depicts a schematic cross-sectional view of a bus bar tray.

Fig. 14-2 depicts a schematic top view of a bus tray.

Fig. 14-3 illustrate a side view schematic of a bus bar tray.

FIG. 14-4 depicts a schematic cross-sectional view E-E of FIG. 14-2.

FIG. 14-5 depicts a schematic sectional view F-F of FIG. 14-2.

Fig. 15-1 depicts a schematic bottom view of a port plate.

Fig. 15-2 depicts one of the schematic cross-sectional views of the port plate.

Fig. 15-3 depicts a schematic top view of a port plate.

Fig. 15-4 show a second schematic cross-sectional view of the port plate.

Fig. 16-1 depicts a cross-sectional schematic view of a cleat.

Fig. 16-2 depicts a schematic top view of a cleat.

FIG. 17-1 depicts a schematic cross-sectional view of a first one-way valve.

Fig. 17-2 depicts a schematic end view of the first one-way valve.

Fig. 17-3 illustrate a side view schematic of the first one-way valve.

Fig. 18-1 depicts a schematic top view of the first housing end cap.

Fig. 18-2 depicts a cross-sectional schematic view of the first housing end cap.

Fig. 18-3 depicts a bottom schematic view of the first housing end cap.

Fig. 19-1 depicts a schematic top view of a shaft end gland.

Fig. 19-2 depicts a cross-sectional schematic view of the shaft end gland.

Fig. 20-1 depicts a cross-sectional schematic view of the second housing end cap.

Fig. 20-2 depicts a schematic top view of the second housing end cap.

Fig. 21-1 shows a schematic cross-sectional view of the spindle body.

Fig. 21-2 shows a schematic end view of the spindle body.

FIG. 22 is a schematic cross-sectional view of a spindle.

Fig. 23-1 depicts a schematic cross-sectional view of a plunger gland.

Fig. 23-2 depicts a schematic side view of a plunger gland.

Detailed Description

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" and "fixedly connected" should be interpreted broadly, that is, any connection between the two that is not in a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.

In the claims, the specification and the drawings of the present invention, the terms "including", "having", and variations thereof, are intended to be inclusive and not limiting.

Referring to fig. 1 to 23-2, a preferred embodiment of the end-face-controlled pilot-operated check valve flow-distribution radial plunger hydraulic apparatus includes a housing 100, a plurality of plunger assemblies 200, a main shaft 300, a confluence plate 400, a distribution plate 500, a number of first pilot-operated check valves 600 corresponding to the plunger assemblies 200, and a number of second pilot-operated check valves 700 corresponding to the plunger assemblies 200.

The housing 100 is provided with a plurality of plunger chambers 101, a plurality of first valve chambers 102, a plurality of second valve chambers 103, a fitting chamber 104, a high-pressure oil passage 105, and a low-pressure oil passage 106. In this embodiment, the plunger chamber is equipped with 5, and first valve pocket, second valve pocket all are equipped with 5.

As shown in fig. 3, the left end surface of the case is defined as a K1 end surface, and the right end surface of the case is defined as a K2 end surface.

In this embodiment, the housing 100 includes a housing body 110 and a first housing end cap 120, the housing body 110 is pentagonal, and each side is provided with a plunger cavity 101. As shown in fig. 5, the housing 100 further includes a plunger cover 130, and the plunger cover 130 covers the plunger cavity 101.

The first valve chamber and the second valve chamber are provided in pairs on the K1 end face of the case body. The plunger cavity 101, the first valve cavity 102, the second valve cavity 103, the assembly cavity 104, the high-pressure oil passage 105 and the low-pressure oil passage 106 are all arranged on the shell body 110, and the assembly cavity 104 is located on the end face K1 of the shell body 110.

In this embodiment, the housing 100 further includes an axial end cover 140 and a second housing end cover 150, and the axial end cover 140 and the second housing end cover 150 are engaged with the main shaft 300.

The spindle 300 is rotatably mounted in the housing 100 and drivingly connected to all of the plunger assemblies 200, and each plunger assembly 200 can slide up and down in the corresponding plunger cavity 101.

In this embodiment, the spindle 300 includes a spindle body 310 and a rotating shaft 320, the spindle body 310 is rotatably installed in the shell body 110 and extends out of the K2 end surface of the shell body 110, and the plunger assembly 200 is in transmission connection with the spindle body 310. The center of the confluence disc 400 is provided with a rotating shaft hole 410, the rotating shaft 320 passes through the rotating shaft hole 410, and two ends of the rotating shaft 320 are respectively connected with the main shaft body 310 and the port plate 500.

In this embodiment, as shown in fig. 21-1, the spindle body 310 includes a first spindle section 311, a second spindle section 312, a third spindle section 313 and a fourth spindle section 314, which are connected in sequence, and the first spindle section 311 is in insertion fit with the rotating shaft 320 to drive the rotating shaft 320 to rotate synchronously; the second main shaft section 312 is eccentric and the outer circumference thereof is provided with a double-row full cylindrical roller bearing 315, and the outer ring of the double-row full cylindrical roller bearing 315 is connected with the plunger assembly 200; the third spindle section 313 is peripherally provided with a third spindle section bearing 316, and the fourth spindle section 314 extends out of the housing body 110. The second shell end cap 150 is fixedly connected to the K2 end face of the shell body 110 by bolts, the shaft end cap 140 is pressed against the end face of the second shell end cap 150 and the third main shaft section 313 bearing, and the shaft end cap 140 and the second shell end cap 150 are locked with the shell body 110 by bolts after penetrating through the shaft end cap 140 and the second shell end cap 150, so that the main shaft body 310 can be limited.

As shown in fig. 1 and 2, the plunger assembly 200 includes a plunger 210, a plunger shoe 220 and a plunger return ring 230, the plunger 210 is slidably connected in the plunger cavity 101 up and down, the top end of the plunger shoe 220 is sleeved in the plunger 210, the bottom end of the plunger shoe 220 abuts against the outer ring of the double-row full cylindrical roller bearing 315, the plunger return ring 230 is sleeved at the bottom end of the plunger shoe 220, and the plunger 210 slides up and down in the plunger cavity 101 to drive the spindle body 310 to rotate through the plunger shoe 220 and the plunger return ring 230; alternatively, the rotation of the main shaft body 310 may drive the plunger 210 to slide up and down in the plunger cavity 101 through the plunger shoe 220 and the plunger return ring 230. This part is prior art and will not be described in detail.

The confluence disc 400 is fixedly connected in the assembly cavity 104, a first annular groove 420 and a second annular groove 430 which are respectively communicated with the high-pressure oil path 105 and the low-pressure oil path 106 are arranged on the periphery of the confluence disc, and a flow distribution cavity 440 is further arranged on the end surface of the confluence disc.

In this embodiment, the current collecting plate 400 is provided with a current collecting plate boss 450, the current collecting plate 400 extends into the assembly cavity 104, the current collecting plate boss 450 abuts against the end surface of the housing body 110, the current distribution cavity 440 is arranged at the current collecting plate boss 450, the current distribution plate 500 is flush with the end surface of the current collecting plate boss 450, and the first housing end cap 120 presses against the current distribution plate 500 and the current collecting plate boss 450 and is fixedly connected with the housing body 110. As shown in fig. 5, the first housing end cap 120, the manifold plate boss 450 and the housing body 110 are fastened by bolts.

In this embodiment, as shown in fig. 14-2, the bottom wall of the port cavity 440 is provided with five first flow-merging holes 441 annularly spaced and communicated with the first valve body oil-controlling cavity and five second flow-merging holes 442 annularly spaced and communicated with the second valve body oil-controlling cavity, the first flow-merging holes 441 are concentrically arranged with the second flow-merging holes 442, and the first flow-merging holes 441 are located at the inner ring of the second flow-merging holes 442. As shown in fig. 14-4 and 14-5, the first and second confluence holes 441 and 442 extend to the outer circumferential surface of the confluence plate 400.

As shown in fig. 8 and 9, the case body 110 is further provided with a first control oil hole 111 communicating with the first valve body oil control chamber and a second control oil hole 112 communicating with the second valve body oil control chamber, the first control oil hole 111 communicating with the first confluence hole 441, and the second control oil hole 112 communicating with the second confluence hole 442. Thereby, the flow distribution of the first and second valve body-controlled oil chambers by the flow distribution plate 500 is converted into the flow distribution of the first and second confluence holes 441 and 442 at the bottom wall of the flow distribution chamber 440.

The port plate 500 is rotatably mounted in the port chamber 440 and is drivingly connected to the main shaft 300, and is provided with a high-pressure flow groove capable of communicating with the high-pressure oil passage 105 and a low-pressure flow groove capable of communicating with the low-pressure oil passage 106.

In this embodiment, the back surface of the valve plate 500 abuts against the bottom wall of the valve chamber 440, and the high-pressure flow distribution groove and the low-pressure flow distribution groove are both located on the back surface of the valve plate 500, and the first flow collecting hole 441 and the second flow collecting hole 442 can be alternately communicated with the high-pressure flow distribution groove and the low-pressure flow distribution groove, respectively.

In this embodiment, as shown in fig. 15-1, two high-pressure distribution grooves are provided, and are both arc-shaped, the two high-pressure distribution grooves are a high-pressure inner distribution groove 511 and a high-pressure outer distribution groove 512, the two low-pressure distribution grooves are two arc-shaped, and are a low-pressure inner distribution groove 513 and a low-pressure outer distribution groove 514, wherein the high-pressure inner distribution groove 511 and the low-pressure inner distribution groove 513 are located on the same circumference and are symmetrically arranged, and the high-pressure outer distribution groove 512 and the low-pressure outer distribution groove 514 are located on the same circumference and are symmetrically arranged; the first confluence hole 441 corresponds to a circumference where the high pressure inner distribution groove 511 is located; the second collecting hole 442 corresponds to the circumference of the high-pressure outer distribution groove 512.

In this embodiment, as shown in fig. 15-3, the front surface of the port plate 500 is provided with an eccentric groove 510 and two high-pressure branch holes 515 respectively communicating with the two high-pressure port grooves, and the two high-pressure branch holes 515 are located in the eccentric groove 510. Two low-pressure distributing holes 516 which are respectively communicated with the two low-pressure distributing grooves are formed in the side surface of the distributing plate 500. The outer peripheral surface of the confluence disc 400 is further provided with a second control low-pressure port 443 communicated with the two low-pressure diversion holes 516. The end surface of the housing 100 is further provided with a first control high-pressure port 121 communicated with the two high-pressure branch holes 515. In this embodiment, the first control high-pressure port 121 is disposed at the center of the first housing end cover 120. The first control high pressure port 121 may be connected to the high pressure oil passage 105 to input high pressure oil to the first control high pressure port 121, and the second control low pressure port 443 may be connected to the low pressure oil passage 106 to be depressurized.

In this embodiment, the radial plunger hydraulic device further includes a wear-resistant gasket 520, as shown in fig. 16-2, the wear-resistant gasket 520 is sandwiched between the port plate 500 and the bottom wall of the port chamber 440, and a pin 521 is further provided, and the pin 521 fixes the port plate 500, the wear-resistant gasket 520 and the bottom wall of the port chamber 440 together; the wear-resistant gasket 520 is provided with first through holes 522 corresponding to the first confluence holes 441 one to one and second through holes 523 corresponding to the second confluence holes 442 one to one.

Each first hydraulic control one-way valve 600 comprises a first one-way valve body 610 and a first one-way valve core, wherein the first one-way valve body 610 is installed in the first valve cavity 102 and provided with a first valve body oil control cavity 611, a first valve body high-pressure cavity 612 and a first valve body low-pressure cavity 613, the first one-way valve core is movably installed in the first one-way valve body 610 and can control the connection and disconnection between the first valve body high-pressure cavity 612 and the first valve body low-pressure cavity 613, the first valve body low-pressure cavity 613 is communicated with the corresponding plunger cavity 101, the first valve body high-pressure cavity 612 is communicated with the first ring groove 420, and the first valve body oil control cavity 611 is alternately communicated with the high-pressure flow groove and the low-pressure flow distribution groove. That is, the rotation of the port plate 500 makes the first confluence hole 441 alternately communicate with the high pressure inner distribution groove 511 and the low pressure inner distribution groove 513.

In this embodiment, as shown in fig. 17-1, the first check valve body 610 is provided with a first movable chamber 614, the first check valve spool includes a first valve spool 615 and a first valve spool piece 616 and a second valve spool piece 617 secured to opposite ends of the first valve spool 615, the first valve core column 615 is movably sleeved in the first movable cavity 614 and can drive the first valve core block 616 and the second valve core block 617 to synchronously move, the first valve core block 616 is positioned in the first valve body oil control cavity 611, the first valve core block 616 divides the first valve body oil control cavity 611 into two independent first valve body oil control sub-cavities, the second valve core block 617 is positioned in the first valve body high pressure cavity 612 and can move between the opening of the first valve body high pressure cavity 612 and the closing of the first valve body high pressure cavity 612, and a first valve core elastic element 620 is further arranged, the first valve core elastic member 620 is interposed between the first valve core block 616 and the wall of the first valve body control oil chamber 611.

Each second hydraulic control one-way valve 700 comprises a second one-way valve body 710 and a second one-way valve core, the second one-way valve body 710 is installed in the second valve cavity 103 and is provided with a second valve body control oil cavity 711, a second valve body high-pressure cavity 712 and a second valve body low-pressure cavity 713, the second one-way valve core is movably installed in the second one-way valve body 710 and can control the connection and disconnection between the second valve body high-pressure cavity 712 and the second valve body low-pressure cavity 713, the second valve body high-pressure cavity 712 is communicated with the corresponding plunger cavity 101, the second valve body low-pressure cavity 713 is communicated with the second annular groove 430, and the second valve body control oil cavity 711 is alternately communicated with the high-pressure flow distribution groove and the low-pressure flow distribution groove. That is, the port plate 500 rotates to alternately connect the second confluence holes 442 with the high pressure outer port groove 512 and the low pressure outer port groove 514.

In this embodiment, the second one-way valve body 710 is provided with a second movable cavity, the second one-way valve core includes a second valve core column and a third valve core block and a fourth valve core block fixedly connected to two ends of the second valve core column, the second valve core column is movably sleeved in the second movable cavity and can drive the third valve core block and the fourth valve core block to move synchronously, the third valve core block is located in the second valve body oil control cavity and divides the second valve body oil control cavity into two independent second valve body oil control sub-cavities, the fourth valve core block is located in the second valve body high pressure cavity 712 and can move between the opening of the second valve body high pressure cavity 712 and the closing of the second valve body high pressure cavity 712, and a second valve core elastic element is further provided and is clamped between the third valve core block and the wall of the second valve body oil control cavity.

The specific structure of the second one-way valve is identical to that of the first one-way valve.

The working method of the end surface controlled hydraulic control one-way valve flow distribution radial plunger hydraulic device comprises the following steps:

when this radial plunger hydraulic means is hydraulic motor, high-pressure oil circuit 105 links to each other with the pressure oil source and high-pressure oil circuit is oil feed passageway, and low-pressure oil circuit 106 is the passageway that produces oil:

when one of the plunger assemblies 200 is located at the upper top position, the corresponding first valve body control oil chamber 611 is communicated with the high-pressure distribution groove, that is, the first confluence hole 441 is communicated with the high-pressure inner distribution groove 511, and then the first one-way valve core controls the first valve body high-pressure chamber 612 to be communicated with the first valve body low-pressure chamber 613; the corresponding second valve body oil control chamber 711 is communicated with the low-pressure distribution groove, that is, the second confluence hole 442 is communicated with the low-pressure external distribution groove 514, the second one-way valve core controls the second valve body high-pressure chamber 612 to be disconnected with the second valve body low-pressure chamber 613, and high-pressure oil flows through the high-pressure oil passage 105, the first ring groove 420, the first valve body high-pressure chamber 612 and the first valve body low-pressure chamber 613 and then enters the corresponding plunger chamber 101 to push the plunger 210 to move downwards, so that the volume of the plunger chamber 101 is increased, and the main shaft 300 is driven to do forward circular motion until the plunger assembly 200 reaches the lower bottom position;

when the plunger assembly is located at the lower bottom position, the main shaft rotates forward 180 degrees, the corresponding first valve body oil control cavity 611 is communicated with the low-pressure flow distribution groove, that is, the first flow converging hole 411 is communicated with the low-pressure inner flow distribution groove 513, and the first one-way valve core controls the first valve body high-pressure cavity 612 to be disconnected with the first valve body low-pressure cavity 613; the corresponding second valve body control oil chamber 711 is communicated with the high-pressure distribution groove, that is, the second confluence hole 442 is communicated with the high-pressure external distribution groove 512, the second check valve core controls the second valve body high-pressure chamber 712 to be communicated with the second valve body low-pressure chamber 713, the plunger assembly 200 moves upwards under the thrust of other plunger assemblies 200 and the inertia force of the spindle 300, the volume of the plunger chamber 101 is reduced, and oil in the plunger chamber 101 flows out of the low-pressure oil passage 106 after passing through the second valve body high-pressure chamber 712, the second valve body low-pressure chamber 713 and the second annular groove 430, so that the periodic movement of a single plunger assembly 200 is realized;

the reciprocating motion of the plunger assemblies 200 enables the main shaft 300 to continuously rotate in the forward direction, so that the hydraulic energy is converted into mechanical energy.

When the radial plunger hydraulic device is a hydraulic pump, the high-pressure oil way 105 is connected with a high-pressure oil tank or a hydraulic load, the high-pressure oil way is an oil outlet channel, the low-pressure oil way 106 is connected with a low-pressure oil tank, and the low-pressure oil way is an oil inlet channel:

the main shaft 300 rotates reversely to drive at least one plunger assembly 200 to move downwards from the upper top position, the volume of the corresponding plunger cavity 101 is increased, vacuum is generated, the pressure in the plunger cavity 101 is lower than that of a low-pressure oil tank, at the moment, the second valve body oil control cavity 711 is communicated with the high-pressure external distribution groove 512, and the second one-way valve core controls the second valve body high-pressure cavity 712 to be communicated with the second valve body low-pressure cavity 713; the first valve body oil control chamber 611 is communicated with the low-pressure inner flow distribution groove 513, the first one-way valve core controls the first valve body high-pressure chamber 612 to be disconnected with the first valve body low-pressure chamber 613, oil in the low-pressure oil tank flows through the low-pressure oil path 106, the second annular groove 430, the second valve body low-pressure chamber 713 and the second valve body high-pressure chamber 712 to enter the plunger chamber 101 until the plunger assembly 200 moves to the lower bottom position, and at the moment, the spindle 300 drives the rotating shaft to rotate 180 degrees in the reverse direction;

the main shaft 300 continues to rotate in the reverse direction for 180 degrees, the plunger assembly 200 starts to move upwards, the volume of the corresponding plunger cavity 101 is reduced, the pressure is increased, and the pressure is higher than that of a high-pressure oil tank or a hydraulic load, at the moment, the first valve body oil control cavity 611 is communicated with the high-pressure inner flow distribution groove 511, and the first check valve core controls the first valve body high-pressure cavity 612 to be communicated with the first valve body low-pressure cavity 613; the second valve body control oil chamber 711 is communicated with the low-pressure external distributing groove 514, the second one-way valve core controls the second valve body high-pressure chamber 712 to be disconnected with the second valve body low-pressure chamber 713, and oil in the plunger chamber 101 flows through the first valve body low-pressure chamber 713, the first valve body high-pressure chamber 712 and the first annular groove 420 and then enters a high-pressure oil tank or a hydraulic load part to realize oil discharge movement of the plunger assembly 200;

under the driving of the reverse rotation of the main shaft 300, the plunger assemblies 200 suck low-pressure oil into the plunger cavities 101, and form pressure oil to be discharged, so that the conversion of mechanical energy into hydraulic energy is realized.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. The hydraulic control check valve flow distribution radial plunger hydraulic device controlled by the end surface is characterized in that: the hydraulic control valve comprises a shell, a plurality of plunger assemblies, a main shaft, a confluence disc, a port plate, first hydraulic control one-way valves with the same number as the plunger assemblies and in one-to-one correspondence with the plunger assemblies, and second hydraulic control one-way valves with the same number as the plunger assemblies and in one-to-one correspondence with the plunger assemblies;

2. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 1, wherein: the bottom wall of the distributing cavity is provided with a plurality of first confluence holes which are arranged at intervals in an annular mode and communicated with the first valve body oil control cavity and a plurality of second confluence holes which are arranged at intervals in an annular mode and communicated with the second valve body oil control cavity, the first confluence holes and the second confluence holes are arranged in a concentric mode, and the first confluence holes are located in the inner ring of the second confluence holes; the flow distribution plate back leans on to support at the flow distribution chamber diapire just high-pressure distribution groove and low-pressure distribution groove all are located the flow distribution plate back, and first flow convergence hole and second flow convergence hole can be respectively with high-pressure distribution groove, the low-pressure distribution groove switch-on in turn.

3. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 2, wherein: the two high-pressure distribution grooves are respectively a high-pressure inner distribution groove and a high-pressure outer distribution groove, the two low-pressure distribution grooves are respectively arc-shaped, the two high-pressure distribution grooves are respectively a low-pressure inner distribution groove and a low-pressure outer distribution groove, the high-pressure inner distribution groove and the low-pressure inner distribution groove are located on the same circumference and are symmetrically arranged, and the high-pressure outer distribution groove and the low-pressure outer distribution groove are located on the same circumference and are symmetrically arranged; the first confluence hole corresponds to the circumference of the high-pressure inner flow distribution groove; the second confluence hole corresponds to the circumference of the high-pressure outer flow distribution groove.

4. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 3, wherein: the front surface of the valve plate is provided with two high-pressure shunting holes which are respectively communicated with the two high-pressure valve grooves, and the side surface of the valve plate is provided with two low-pressure shunting holes which are respectively communicated with the two low-pressure valve grooves; the end face of the shell is also provided with a first control high-pressure port communicated with the two high-pressure shunting holes, and the peripheral surface of the confluence disc is also provided with a second control low-pressure port communicated with the two low-pressure shunting holes.

5. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 3, wherein: the first confluence hole and the second confluence hole extend to the peripheral surface of the confluence disc; the shell is further provided with a first control oil hole communicated with the first valve body oil control cavity and a second control oil hole communicated with the second valve body oil control cavity, the first control oil hole is communicated with the first confluence hole, and the second control oil hole is communicated with the second confluence hole.

6. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 3, wherein: the wear-resistant gasket is clamped between the valve plate and the bottom wall of the valve cavity, and a pin is additionally arranged and used for fixing the valve plate, the wear-resistant gasket and the bottom wall of the valve cavity together; the wear-resisting gasket is equipped with the first via hole with first via hole one-to-one and with the second via hole one-to-one of second converge the hole.

7. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 4, wherein: the shell comprises a shell body and a first shell end cover, the plunger cavity, the first valve cavity, the second valve cavity, the assembling cavity, the high-pressure oil way and the low-pressure oil way are all arranged on the shell body, the assembling cavity is positioned on one end face of the shell body, the confluence disc is provided with a confluence disc boss, the confluence disc extends into the assembling cavity, the confluence disc boss abuts against the end face of the shell body, the flow distribution cavity is arranged at the confluence disc boss, the flow distribution disc is flush with the end face of the confluence disc boss, and the first shell end cover presses against the flow distribution disc and the confluence disc boss and is fixedly connected with the shell body; the first control high-pressure port is arranged in the center of the first shell end cover.

8. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 7, wherein: the main shaft comprises a main shaft body and a rotating shaft, the main shaft body is rotatably installed in the shell body and extends out of the other end face of the shell body, and the plunger assembly is in transmission connection with the main shaft body; the center of the confluence disc is provided with a rotating shaft hole, the rotating shaft penetrates through the rotating shaft hole, and two ends of the rotating shaft are respectively connected with the main shaft body and the valve plate.

9. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 8, wherein: the main shaft body comprises a first main shaft section, a second main shaft section, a third main shaft section and a fourth main shaft section which are sequentially connected, and the first main shaft section is in inserted fit with the rotating shaft so as to drive the rotating shaft to synchronously rotate; the second main shaft section is eccentric and the periphery of the second main shaft section is provided with a double-row full cylindrical roller bearing, and the outer ring of the double-row full cylindrical roller bearing is connected with the plunger assembly; a third main shaft section bearing is arranged on the periphery of the third main shaft section, and the fourth main shaft section extends out of the shell body; the plunger assembly comprises a plunger, a plunger sliding shoe and a plunger return ring, the plunger is connected in a plunger cavity in an up-and-down sliding manner, the top end of the plunger sliding shoe is sleeved in the plunger, the bottom end of the plunger sliding shoe abuts against the outer ring of the double-row full cylindrical roller bearing, the plunger return ring is sleeved at the bottom end of the plunger sliding shoe, and the plunger can slide up and down in the plunger cavity to drive the main shaft body to rotate through the plunger sliding shoe and the return ring; alternatively, the main shaft body can rotate to drive the plunger to slide up and down in the plunger cavity through the plunger sliding shoe and the return ring.

10. The face controlled pilot operated check valve port radial plunger hydraulic apparatus of claim 1, wherein: the first one-way valve body is provided with a first movable cavity, the first one-way valve core comprises a first valve core column, a first valve core block and a second valve core block, the first valve core block and the second valve core block are fixedly connected to two ends of the first valve core column respectively, the first valve core column is movably sleeved in the first movable cavity and can drive the first valve core block and the second valve core block to synchronously move, the first valve core block is positioned in the first valve body oil control cavity and divides the first valve body oil control cavity into two independent first valve body oil control sub-cavities, the second valve core block is positioned in the first valve body high-pressure cavity and can move between the opening of the first valve body high-pressure cavity and the closing of the first valve body high-pressure cavity, and a first valve core elastic element is additionally arranged and is clamped between the first valve core block and the wall of the first valve body oil control cavity; the second one-way valve body is provided with a second movable cavity, the second one-way valve core comprises a second valve core column, a third valve core block and a fourth valve core block, the third valve core block and the fourth valve core block are fixedly connected to two ends of the second valve core column respectively, the second valve core column is movably sleeved in the second movable cavity and can drive the third valve core block and the fourth valve core block to move synchronously, the third valve core block is located in the second valve body oil control cavity and divides the second valve body oil control cavity into two independent second valve body oil control sub-cavities, the fourth valve core block is located in the second valve body high-pressure cavity and can move between the opening of the second valve body high-pressure cavity and the closing of the second valve body high-pressure cavity, and a second valve core elastic element is additionally arranged and clamped between the third valve core block and the wall of the second valve body oil control cavity.

11. A method for operating a face-controlled pilot-controlled check valve flow-distribution radial plunger hydraulic device, which applies the face-controlled pilot-controlled check valve flow-distribution radial plunger hydraulic device according to any one of claims 1 to 10, characterized in that: the method comprises the following steps:

12. A method for operating a face-controlled pilot-controlled check valve flow-distribution radial plunger hydraulic device, which applies the face-controlled pilot-controlled check valve flow-distribution radial plunger hydraulic device according to any one of claims 1 to 10, characterized in that: the method comprises the following steps: