A valve core rotating flow distribution rotary valve device

Abstract

The present invention discloses a valve core rotating flow distribution rotary valve device. The valve core has a cylindrical shape, a flow channel is provided inside, and an oil port is provided outside; the valve body has an appearance of a straight octagonal prism with a through hole as the axis, and an oil supply window, an oil return window, and an actuator control window are provided on the outer peripheral surface, and is connected to an external hydraulic component through each window; the valve core and the valve body are coaxial, the valve body is fixed, the valve core can rotate around the axis, the inner wall of the valve body can block the oil port of the valve core, and the oil port on the valve core is rotated to connect with the window on the valve body to achieve connection with different oil circuits, and the rotation of the valve core relative to the valve body achieves connection and isolation of different oil circuits. The present invention realizes the periodic switching of multiple working states of the rotary valve by opening multiple groups of oil channels inside the valve core, and has multiple hydraulic actuator control windows, which can simultaneously control multiple hydraulic actuators to be in different working states, thereby realizing the periodic switching of multiple hydraulic actuators.

Description

Technical Field

[0001] The invention belongs to the technical field of rotary flow distribution valves, and in particular relates to a valve core rotary flow distribution valve device. Background Art

[0002] In many hydraulically driven mechanical structures that rotate periodically, the operating state of hydraulic actuators needs to be periodically switched. Conventional spool-type reciprocating directional valves can switch operating states through electromagnetic or manual control. However, these valves suffer from low switching frequencies, slow response speeds, unstable flow characteristics, high noise levels, and complex structures, making them unsuitable for use in certain scenarios.

[0003] Existing ordinary reversing valves can only control a single hydraulic actuator and cannot control multiple hydraulic actuators at the same time. When the mechanism contains multiple actuators, multiple reversing valves need to be arranged, which is not conducive to industrial scenarios where the working space is limited.

[0004] To address these issues, some new directional control valves employ a rotary spool structure. This replaces the reciprocating motion of the spool in conventional directional control valves with a rotary motion, reducing hydraulic shock during switching and resulting in smoother flow characteristics. However, these rotary valves still require additional actuators, such as manual or electromagnetic, resulting in low switching frequencies, limited controllable actuators, low integration, and a limited number of switchable operating states. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide a valve core rotating flow distribution rotary valve device, which can simultaneously control multiple hydraulic actuators in different working states.

[0006] The technical solutions adopted in the present invention are as follows:

[0007] The rotary valve device comprises a valve core 2, a valve body 3, a sealing ring 4, a circlip 5, a housing 6, and a gear set 7. The valve body 3 is a prismatic structure with a central circular through-hole. The cylindrical valve core 2 is located within the central through-hole of the valve body 3. The outer wall of the valve core 2 is sealed to the inner circumference of the valve body 3 via the sealing ring 4. The valve core 2 and the valve body 3 are coaxially arranged. The top and bottom ends of the valve core 2 contact the upper and lower ends of the valve body 3 via the circlip 5, which is used to limit the axial displacement of the valve core 2 relative to the valve body 3. The valve body 3 is fixedly mounted on the housing 6. The housing 6 is internally provided with a gear set 7, which is connected to the bottom of the valve core 2 and is used to drive the valve core 2 to rotate about its own axis. The valve core 2 is provided with several oil passages, which communicate with an external hydraulic actuator through windows in the valve body 3. The rotation of the valve core 2 controls the position of the oil passages, thereby controlling the communication between the oil passages in the valve core 2 and the hydraulic actuator, thereby changing the operating state of the hydraulic actuator.

[0008] The valve core 2 is provided with an axial oil passage arranged along the axial direction of the valve core 2. The axial oil passage mainly consists of two high-pressure communication oil passages 12, two low-pressure communication oil passages 23 and a transition communication oil passage 13. The transition communication oil passage 13 is located in the middle of the valve core 2. The high-pressure communication oil passage 12 and the low-pressure communication oil passage 23 are provided around the transition communication oil passage 13.

[0009] The valve core 2 is evenly provided with five layers of radial oil passages along its own axial direction. From top to bottom, the first layer is provided with an annular first-layer annular high-pressure oil passage 19 and two first-layer high-pressure input oil passages 9. Both first-layer high-pressure input oil passages 9 are connected to the first-layer annular high-pressure oil passage 19; the second layer is provided with two second-layer high-pressure control oil passages 10, a cross-shaped second-layer transition oil passage 15 and two second-layer low-pressure control oil passages 20; the third layer is provided with two third-layer high-pressure control oil passages 11, a cross-shaped third-layer transition oil passage 15 and two second-layer low-pressure control oil passages 20. The oil channel 16 and two third-layer low-pressure control oil channels 21 are provided on the fourth layer; the fourth layer is provided with an annular fourth-layer annular low-pressure oil channel 17 and two fourth-layer low-pressure input oil channels 22, and the two fourth-layer low-pressure input oil channels 22 are both connected to the fourth-layer annular low-pressure oil channel 17; the fifth layer is provided with an annular fifth-layer annular transition oil channel 18 and a fifth-layer transition oil channel 14, and the fifth-layer transition oil channel 14 is arranged along the radial direction of the valve core 2, and both ends of the fifth-layer transition oil channel 14 are connected to the fifth-layer annular transition oil channel 18.

[0010] The number and arrangement positions of the first layer high-pressure input oil passage 9, the second layer high-pressure control oil passage 10 and the third layer high-pressure control oil passage 11 are the same and aligned, and the first layer high-pressure input oil passage 9, the second layer high-pressure control oil passage 10 and the third layer high-pressure control oil passage 11 are all connected to the high-pressure communication oil passage 12;

[0011] The second and third transition oil passages 15 and 16 are each provided with four ports on their outer peripheries. The ports are arranged in the same and aligned positions in the second and third transition oil passages 15 and 16. The second and third transition oil passages 15 and 16 and the fifth transition oil passage 14 are all in communication with the transition communication oil passage 13.

[0012] The number and arrangement positions of the second-layer low-pressure control oil channel 20, the third-layer low-pressure control oil channel 21 and the fourth-layer low-pressure input oil channel 22 are the same and aligned, and the second-layer low-pressure control oil channel 20, the third-layer low-pressure control oil channel 21 and the fourth-layer low-pressure input oil channel 22 are all connected to the low-pressure communication oil channel 23.

[0013] The valve body 3 is a regular octagonal prism, and five layers of windows are evenly arranged on the side wall of the valve body 3 along its own axial direction. From top to bottom, the first layer is provided with a P high-pressure window 24, the second layer is provided with an A1 control window 29 and a B1 control window 27, the third layer is provided with an A2 control window 30 and a B2 control window 28, the fourth layer is provided with a T low-pressure window 25, and the fifth layer is provided with a T' transition window 26.

[0014] The P high-pressure window 24 is connected to the first-layer annular high-pressure oil channel 19, and the P high-pressure window 24 is used to provide high-pressure oil to the valve core 2. The fourth-layer annular low-pressure oil channel 17 is connected to the T low-pressure window 25, and the low-pressure oil in the valve core 2 is connected to the external oil tank through the T low-pressure window 25. The fifth-layer annular transition oil channel 18 is connected to the T' transition window 26, and the T' transition window 26 is connected to the transition communication oil channel 13 through the fifth-layer transition oil channel 14, thereby balancing the oil pressure in the second-layer transition oil channel 15 / the third-layer transition oil channel 16; the hydraulic actuator includes two hydraulic cylinders, the A1 control window 29 and the B1 control window 27 are respectively connected to the two oil ports of one hydraulic cylinder, and the A2 control window 30 and the B2 control window 28 are respectively connected to the two oil ports of the other hydraulic cylinder.

[0015] The two high-pressure communication oil passages 12 are symmetrically arranged about the central axis of the valve core 2, and the two low-pressure communication oil passages 23 are symmetrically arranged about the central axis of the valve core 2. The high-pressure communication oil passages 12 and the low-pressure communication oil passages 23 are located on the same circumference of the valve core 2, and the high-pressure communication oil passages 12 and the low-pressure communication oil passages 23 are alternately arranged along the circumference of the valve core 2. Adjacent high-pressure communication oil passages 12 and low-pressure communication oil passages 23 are arranged at 90 degrees along the circumferential direction of the valve core 2.

[0016] The P high-pressure window 24 and the T low-pressure window 25 are located on the same side of the valve body 3, the A1 control window 29 and the B1 control window 27 are arranged at 90-degree intervals along the circumferential direction of the valve body 3, the A2 control window 30 and the B2 control window 28 are arranged at 90-degree intervals along the circumferential direction of the valve body 3, and the A1 control window 29 and the A2 control window 30 are arranged at 45-degree intervals on the circumference of the valve body 3; the T' transition window 26 is not arranged on the same side of the valve body 3 as the other windows.

[0017] The valve core 2 adjusts the communication state between the oil passage and the window in the valve body 3 by rotating itself, thereby changing the working state of the hydraulic actuator; the position of each layer of window in the valve body 3 corresponds to the position of each layer of radial oil passage in the valve core 2, and the oil passage of the valve core 2 and the window of the valve body 3 include the following communication states: when the A1 control window 29 is connected to the second layer of high-pressure control oil passage 10, the B1 control window 27 is connected to the second layer of low-pressure control oil passage 20; when the A1 control window 29 is connected to the second layer of low-pressure control oil passage 20, the B1 control window 27 is connected to the second layer of high-pressure control oil passage 10; when the A1 control window 2 9 is connected to one port in the second-layer transition oil passage 15, the B1 control window 27 is connected to the other port in the second-layer transition oil passage 15; when the A2 control window 30 is connected to the third-layer high-pressure control oil passage 11, the B2 control window 28 is connected to the third-layer low-pressure control oil passage 21; when the A2 control window 30 is connected to the third-layer low-pressure control oil passage 21, the B2 control window 28 is connected to the third-layer high-pressure control oil passage 11; when the A2 control window 30 is connected to one port in the third-layer transition oil passage 16, the B2 control window 28 is connected to the other port in the third-layer transition oil passage 16.

[0018] The valve core and valve body are coaxially matched, with the five radial channels of the valve core corresponding to the five windows of the valve body, located at the same axial height. The external oil circuit is connected to the valve body, which is fixed. The valve core rotates relative to it, allowing continuous oil flow through the high-pressure window P, low-pressure window T, and transition window T' on the valve body. Rotation of the valve core connects control windows A1 and B1, and control windows A2 and B2 on the valve body to different oil channels. The bottom of the valve core is connected to a gear train, which transmits actuator position information to control the rotation angle of the valve core. Axial torque is transmitted between the gear and the bottom of the valve core via a "I"-shaped boss and groove.

[0019] In the present invention, the valve core is cylindrical in shape, with a flow channel provided inside and an oil port provided on the outside; the valve body is a straight octagonal prism with a through hole as the axis, and an oil supply window, an oil return window, and an actuator control window provided on the outer peripheral surface, and is connected to the external hydraulic components through each window. The valve core and the valve body are coaxial, the valve body is fixed, and the valve core can rotate around the axis. The inner wall of the valve body can block the window of the valve core, and the oil port on the valve core can be rotated to connect with the window on the valve body to achieve connection with different oil circuits. The rotation of the valve core relative to the valve body realizes the connection and isolation of different oil circuits. The valve core is connected to the bottom gear set, and the working state of the distribution valve can be controlled by controlling the rotation angle of the valve core.

[0020] The present invention uses a gear set at the base of the valve core as both a control and power source. Rotation of the valve core switches the operating state of the hydraulic actuator. The control windows on each level are spaced 90 degrees apart, ensuring that when one control window receives high-pressure oil, the other receives low-pressure oil. A transition oil passage exists between the high-pressure and low-pressure oil passages. For control windows on the same level, when one window passes through the transition oil passage, the other also passes through the transition oil passage, ensuring balanced oil pressure in the two chambers of a hydraulic actuator, such as a hydraulic cylinder. Every 45 degrees, the control windows cycle through the high-pressure oil passage, the transition oil passage, the low-pressure oil passage, and finally the transition oil passage. The control oil ports on adjacent levels are spaced 45 degrees apart, resulting in a 45-degree lag in the motion of the actuators controlled by adjacent levels. Due to the symmetrical arrangement of the pressure passages, the valve core maintains dynamic balance during rotation, automatically stabilizing on the valve body's axial position without radial deviation.

[0021] The present invention has the following beneficial effects:

[0022] 1. The present invention provides a valve core rotary type, mechanically rotated driven, with multiple working states, capable of simultaneously controlling a plurality of hydraulic actuators in different working states.

[0023] 2. The present invention cleverly arranges multiple flow channels on the valve core, which can keep the valve core always under force balance during rotation and can cyclically switch between three working states. It has high integration and is easy to install.

[0024] 3. This invention achieves periodic switching of the rotary valve between multiple operating states by providing multiple oil passages within the valve core. Multiple oil ports for controlling hydraulic actuators can simultaneously control multiple hydraulic actuators in different operating states, enabling cyclic switching of multiple hydraulic actuators. The rotation angle of the valve core is controlled by a gear train at the bottom, and this angle information is transmitted through mechanical transmission, enabling automatic and continuous motion output of the hydraulic actuator. This highly integrated system features multiple operating states and enables periodic state switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of the present invention;

[0026] Figure 2 Schematic diagram of the three-dimensional structure of the valve core of the present invention;

[0027] Figure 3 is a cross-sectional view of the valve core structure, a is a cross-sectional view of the valve core structure of the present invention Figure 1 b is a cross-sectional view of the valve core structure of the present invention Figure 2 c is a cross-sectional view of the valve core structure of the present invention Figure 3 ;

[0028] Figure 4It is a schematic diagram of the valve body flow channel of the present invention;

[0029] Figure 5 It is a schematic diagram of the valve core flow channel of the present invention;

[0030] Figure 6 It is a bottom view of the valve core structure of the present invention;

[0031] Figure 7 The working state diagram of the oil ports of the present invention is shown in Figure a. a is a working state diagram of the oil ports A1 and B1; b is a working state diagram of the oil ports A2 and B2;

[0032] In the figure: 1. Screw plug; 2. Valve core; 3. Valve body; 4. Sealing ring; 5. Circlip; 6. Housing; 7. Gear set; 9. First layer high-pressure input oil passage; 10. Second layer high-pressure control oil passage; 11. Third layer high-pressure control oil passage; 12. High-pressure communication oil passage; 13. Transition communication oil passage; 14. Fifth layer transition oil passage; 15. Second layer transition oil passage; 16. Third layer transition oil passage; 17. Fourth layer annular low-pressure oil passage; 18. Fifth layer annular transition oil passage; 19. First layer annular high-pressure oil passage; 20. Second layer low-pressure control oil passage; 21. Third layer low-pressure control oil passage; 22. Fourth layer low-pressure return oil passage; 23. Low-pressure communication oil passage; 24. P high-pressure window; 25. T low-pressure window; 26. T' transition window; 27. B1 control window; 28. B2 control window; 29, A1 control window; 30, A2 control window; P1; first high-pressure oil channel; P2; second high-pressure oil channel; P3, third high-pressure oil channel; P4, fourth high-pressure oil channel; P5, fifth high-pressure oil channel; P6, sixth high-pressure oil channel; T1, first low-pressure oil channel; T2, second low-pressure oil channel; T3, third low-pressure control oil channel; T4, fourth low-pressure control oil channel; T5, fifth low-pressure oil channel; T6, sixth low-pressure oil channel; T'1, first transition oil channel; T'2, second transition oil channel; T'3, fourth transition oil channel; T'4, fourth transition oil channel; T'5, fifth transition oil channel; T'6, sixth transition oil channel; T'7, seventh transition oil channel; T'8, eighth transition oil channel; T'9, ninth transition oil channel; T'10, tenth transition oil channel. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form.

[0034] like Figure 1As shown, the device includes a valve core 2, a valve body 3, a sealing ring 4, an elastic circlip 5, a housing 6, and a gear set 7. The valve body 3 adopts a prismatic structure with a circular through hole in the middle. The cylindrical valve core 2 is located in the central through hole of the valve body 3. The outer wall of the valve core 2 is sealed to the inner circumference of the valve body 3 via the sealing ring 4. The valve core 2 and the valve body 3 are coaxially arranged. The top and bottom ends of the valve core 2 contact the upper and lower ends of the valve body 3 via the elastic circlip 5. The elastic circlip 5 is used to limit the axial displacement of the valve core 2 relative to the valve body 3. The valve body 3 is fixedly mounted on the housing 6. The housing 6 is provided with a gear set 7. The gear set 7 is connected to the bottom of the valve core 2 and is used to drive the valve core 2 to rotate about its own axis. The valve core 2 is provided with several oil passages. The oil passages of the valve core 2 are connected to the external hydraulic actuator through windows provided in the valve body 3. The rotation of the valve core 2 controls the position of the oil passages, thereby controlling the communication mode between the oil passages in the valve core 2 and the hydraulic actuator, thereby changing the operating state of the hydraulic actuator.

[0035] like Figure 2 As shown, the valve core 2 is provided with an axial oil passage arranged along the axial direction of the valve core 2. The axial oil passage mainly consists of two high-pressure communication oil passages 12, two low-pressure communication oil passages 23 and a transition communication oil passage 13. The transition communication oil passage 13 is located in the middle of the valve core 2. The high-pressure communication oil passage 12 and the low-pressure communication oil passage 23 are both opened around the transition communication oil passage (13);

[0036] The valve core 2 is evenly provided with five layers of radial oil passages along its own axial direction. From top to bottom, the first layer is provided with an annular first-layer annular high-pressure oil passage 19 and two first-layer high-pressure input oil passages 9. Both first-layer high-pressure input oil passages 9 are connected to the first-layer annular high-pressure oil passage 19; the second layer is provided with two second-layer high-pressure control oil passages 10, a cross-shaped second-layer transition oil passage 15 and two second-layer low-pressure control oil passages 20; the third layer is provided with two third-layer high-pressure control oil passages 11, a cross-shaped third-layer transition oil passage 15 and two second-layer low-pressure control oil passages 20. Channel 16 and two third-layer low-pressure control oil channels 21; the fourth layer is provided with an annular fourth-layer annular low-pressure oil channel 17 and two fourth-layer low-pressure input oil channels 22, and the two fourth-layer low-pressure input oil channels 22 are both connected to the fourth-layer annular low-pressure oil channel 17; the fifth layer is provided with an annular fifth-layer annular transition oil channel 18 and a fifth-layer transition oil channel 14, the fifth-layer transition oil channel 14 is arranged along the radial direction of the valve core 2, and both ends of the fifth-layer transition oil channel 14 are connected to the fifth-layer annular transition oil channel 18.

[0037] The second and third layers each feature eight channels: two high-pressure control oil passages, four transition oil passages, and two low-pressure control oil passages. The four transition oil passages form a complete cross-shaped transition oil passage, and the eight oil passages are evenly spaced 45 degrees apart around the circumference. The transition oil passages are square through-holes cut into the surface of the valve core, while the high-pressure and low-pressure oil passages are radial circular blind holes that connect to the axial oil passage.

[0038] like Figure 3 a- Figure 3 As shown in Figure c, the number and arrangement position distribution of the first-layer high-pressure input oil channel 9, the second-layer high-pressure control oil channel 10, and the third-layer high-pressure control oil channel 11 are the same, and the arrangement positions are aligned one by one in the axial direction of the valve core 2. In a specific implementation, the two ports of the fifth-layer transition oil channel 14 are also the same as the first-layer high-pressure input oil channel 9 and the arrangement position distribution and are aligned. The first-layer high-pressure input oil channel 9, the second-layer high-pressure control oil channel 10, and the third-layer high-pressure control oil channel 11 are all connected to the high-pressure communication oil channel 12;

[0039] The second and third transition oil passages 15, 16 are each provided with four ports on their outer circumferences. The ports are arranged in the same position and aligned axially with the valve core 2. The second and third transition oil passages 15, 16, and fifth transition oil passage 14 are all in communication with the transition communication oil passage 13.

[0040] The number and arrangement positions of the second-layer low-pressure control oil channel 20, the third-layer low-pressure control oil channel 21 and the fourth-layer low-pressure input oil channel 22 are the same and the arrangement positions are aligned one by one in the axial direction of the valve core 2. The second-layer low-pressure control oil channel 20, the third-layer low-pressure control oil channel 21 and the fourth-layer low-pressure input oil channel 22 are all connected to the low-pressure communication oil channel 23.

[0041] like Figure 4 As shown, the valve body 3 is a regular octagonal prism, and seven windows are evenly arranged on the side wall of the valve body 3 along its own axial direction. From top to bottom, the first layer is provided with a P high-pressure window 24, the second layer is provided with an A1 control window 29 and a B1 control window 27, the third layer is provided with an A2 control window 30 and a B2 control window 28, the fourth layer is provided with a T low-pressure window 25, and the fifth layer is provided with a T' transition window 26;

[0042] The P high-pressure window 24 is connected to the first-layer annular high-pressure oil passage 19, and the P high-pressure window 24 is used to provide high-pressure oil to the valve core 2. The fourth-layer annular low-pressure oil passage 17 is connected to the T low-pressure window 25, and the low-pressure oil in the valve core 2 is connected to the external oil tank through the T low-pressure window 25. The fifth-layer annular transition oil passage 18 is connected to the T' transition window 26, and the T' transition window 26 is connected to the transition communication oil passage 13 through the fifth-layer transition oil passage 14 connected to the fifth-layer annular transition oil passage 18, thereby balancing the oil pressure in the second-layer transition oil passage 15 / the third-layer transition oil passage 16; the hydraulic actuator includes two hydraulic cylinders, the A1 control window 29 and the B1 control window 27 are respectively connected to the two oil ports of one hydraulic cylinder, and the A2 control window 30 and the B2 control window 28 are respectively connected to the two oil ports of the other hydraulic cylinder.

[0043] The two high-pressure communication oil passages 12 are symmetrically arranged about the central axis of the valve core 2, and the two low-pressure communication oil passages 23 are symmetrically arranged about the central axis of the valve core 2. The high-pressure communication oil passages 12 and the low-pressure communication oil passages 23 are located on the same circumference of the valve core 2, and the high-pressure communication oil passages 12 and the low-pressure communication oil passages 23 are alternately arranged along the circumference of the valve core 2, that is, a low-pressure communication oil passage 23 is arranged between the two high-pressure communication oil passages 12, and adjacent high-pressure communication oil passages 12 and low-pressure communication oil passages 23 are arranged at 90 degrees along the circumferential direction of the valve core 2, that is, the connecting line of the two high-pressure communication oil passages 12 is perpendicular to the connecting line of the two low-pressure communication oil passages 23.

[0044] The top ends of the axial oil passages are sealed by screw plugs 1 to prevent the oil in the oil passages from overflowing.

[0045] The P high-pressure window 24 and the T low-pressure window 25 are located on the same side of the valve body 3 (i.e., the P high-pressure window 24 and the T low-pressure window 25 are located on the same plane), the A1 control window 29 and the B1 control window 27 are arranged at 90-degree intervals along the circumferential direction of the valve body 3, the A2 control window 30 and the B2 control window 28 are arranged at 90-degree intervals along the circumferential direction of the valve body 3, and the A1 control window 29 and the A2 control window 30 are arranged at 45-degree intervals on the circumference of the valve body 3; the T' transition window 26 is not arranged on the same side of the valve body 3 as the other windows (i.e., the T' transition window 26 is arranged alone on one side of the valve body 3).

[0046] The valve core 2 adjusts the communication state between the oil passage and the window in the valve body 3 by rotating itself, thereby changing the working state of the hydraulic actuator; the position of each layer of window in the valve body 3 corresponds one-to-one to the position of each layer of radial oil passage in the valve core 2, and the oil passage of the valve core 2 and the windows of the valve body 3 include the following communication states: when the A1 control window 29 is connected to the second layer of high-pressure control oil passage 10, the B1 control window 27 is connected to the second layer of low-pressure control oil passage 20; when the A1 control window 29 is connected to the second layer of low-pressure control oil passage 20, the B1 control window 27 is connected to the second layer of high-pressure control oil passage 10; when the A1 control window 29 is connected to the second layer of low-pressure control oil passage 20, the B1 control window 27 is connected to the second layer of high-pressure control oil passage 10; When connected to one port in the second-layer transition oil passage 15, the B1 control window 27 is connected to another port in the second-layer transition oil passage 15; when the A2 control window 30 is connected to the third-layer high-pressure control oil passage 11, the B2 control window 28 is connected to the third-layer low-pressure control oil passage 21; when the A2 control window 30 is connected to the third-layer low-pressure control oil passage 21, the B2 control window 28 is connected to the third-layer high-pressure control oil passage 11; when the A2 control window 30 is connected to one port in the third-layer transition oil passage 16, the B2 control window 28 is connected to another port in the third-layer transition oil passage 16.

[0047] Transition oil passages 15 and 16 are used to balance the oil pressure in the actuator.

[0048] like Figure 1As shown, the axial oil passage of the valve core 2 is divided into five layers, of which the control oil passage is the second and third layers, which are eight-diameter flow passages; the high-pressure input oil passage is in the first layer, the low-pressure return oil passage is in the fourth layer, and the transition return oil passage is in the fifth layer. The end of the axial oil passage of the valve core 2 is blocked with a screw plug 1 to prevent leakage. There are multiple windows on the valve body 3, which are connected to the external oil circuit and the hydraulic execution period respectively. The valve core 2 and the valve body 3 are coaxially matched. During operation, the valve core 2 rotates coaxially relative to the valve body 3. A sealing ring 4 is provided between the valve core 2 and the valve body 3 to reduce internal oil leakage. Elastic retaining rings 5 ​​are provided at the upper and lower ends of the valve core 2 to limit the axial position of the valve core 2 relative to the valve body 3. The lower end of the valve core 2 is connected to the gear group 7, and the angle control information of the valve core 2 is transmitted through the gear group 7.

[0049] like Figure 5 As shown, multiple oil channels are provided on the valve core 2, and there are five axial oil channels in the middle, which are two high-pressure communication oil channels 12, two low-pressure communication oil channels 23, and a transition communication oil channel 13 on the axis. The valve core is radially provided with multiple groups of oil channels, which are divided into five layers. The first layer is the high-pressure input layer. Two radial first-layer high-pressure input oil channels 9 are symmetrically arranged on the first-layer annular high-pressure oil channel 19, which are the first high-pressure oil channel P1 and the second high-pressure oil channel P2, and are connected to the axial high-pressure communication oil channel 12. High-pressure oil enters the first-layer high-pressure oil channels P1 and P2 through the P high-pressure window 24 on the valve body 3, and then enters the valve core 2; the second and third layers are control layers, and each layer has eight radial channels, which are two high-pressure oil channels, two low-pressure oil channels and four transition oil channels. As shown Figure 2 As shown, the valve core surfaces where the high-pressure oil channel and the low-pressure oil channel are located are both fan-shaped openings with a large oil contact surface area, and the transition oil channels are both square windows on the valve core surface.

[0050] The second layer has eight radial oil passages / ports: two second-layer high-pressure control passages 10 serve as the third high-pressure passage P3 and the fourth high-pressure passage P4; the second-layer transition passage 15 includes four ports: the seventh transition passage T'7, the eighth transition passage T'8, the ninth transition passage T'9, and the tenth transition passage T'10; and two second-layer low-pressure control passages 20 serve as the first low-pressure passage T1 and the second low-pressure passage T2. The passages are evenly spaced 45 degrees apart, and in a clockwise direction, they are: the seventh transition passage T'7, the second low-pressure passage T2, the tenth transition passage T'10, the third high-pressure passage P3, the ninth transition passage T'9, the first low-pressure passage T1, the eighth transition passage T'8, and the fourth high-pressure passage P4. The third layer has eight radial oil passages, with the same shape as the second layer. The two third-layer high-pressure control oil passages 11 include the fifth high-pressure oil passage P5 and the sixth high-pressure oil passage P6. The third-layer transition oil passage 16 includes four ports: the third transition oil passage T'3, the fourth transition oil passage T'4, the fifth transition oil passage T'5, and the sixth transition oil passage T'6. The two third-layer low-pressure control oil passages 21 include the third low-pressure control oil passage T3 and the fourth low-pressure control oil passage T4. Clockwise, they are the third transition oil passage T'3, the fourth low-pressure oil passage T4, the sixth transition oil passage T'6, the fifth high-pressure oil passage P5, the fifth transition oil passage T'5, the third low-pressure oil passage T3, the fourth transition oil passage T'4, and the sixth high-pressure oil passage P6. The fourth layer is the low-pressure return layer. Two radial fourth-layer low-pressure return oil passages 22 are symmetrically arranged on the fourth-layer annular low-pressure oil passage 17: the fifth low-pressure oil passage T5 and the sixth low-pressure oil passage T6. They communicate with the axial low-pressure communication passage 23. Low-pressure oil enters the fourth low-pressure oil passage through the T-shaped low-pressure window 25 on the valve body and then enters the valve core. The fifth layer is the transition layer. Two transition passage ports are symmetrically arranged on the fifth annular transition oil passage 18: the first transition oil passage T'1 and the second transition oil passage T'2. These ports connect to the axial transition oil passage 13.

[0051] like Figure 6 As shown, the bottom of the valve core 2 is provided with a straight groove, which cooperates with the straight boss on the gear in the gear set to transmit axial torque and drive the valve core to rotate. A threaded hole is provided in the center of the bottom of the valve core for connecting to the bottom gear.

[0052] like Figure 7 a- Figure 7 As shown in b, it is the working mode 1 of the flow distribution rotary valve device. Figure 7 Figure a is a sectional view rotated 90 degrees from the control window A1 and the control window B1 of the valve body 3. At this time, the control window A1 on the valve body 3 is connected to the seventh transition oil passage T'7 (ninth transition oil passage T'9) on the valve core, and the control window B1 is connected to the eighth transition oil passage T'8 (tenth transition oil passage T'10) on the valve core. Figure 7b is a 90-degree rotated cross-sectional view of the valve body through control windows A2 and B2. At this point, control window A2 on the valve body communicates with the sixth high-pressure oil passage P6 (fifth high-pressure oil passage P5) on the valve core, and control window B2 communicates with the third low-pressure oil passage T3 (fourth low-pressure oil passage T4) on the valve core. At this point, both control windows A1 and B1 communicate with the transition oil passage in the center of the valve core. The oil pressures in control windows A1 and B1 are balanced, and the connected hydraulic actuator is in a pressure relief state. Control window A2 communicates with the high-pressure oil passage on the valve core, and control window B2 communicates with the low-pressure oil passage on the valve core. The connected hydraulic actuator is in a state of high-pressure oil flow on one side and low-pressure return oil on the other side.

[0053] The valve body remains stationary. After the spool rotates 45 degrees clockwise along its axis, the distribution valve switches to operating mode 2. At this point, control window A1 on the valve body connects to the fourth high-pressure oil passage P4 (third high-pressure oil passage P3) on the spool, and control window B1 connects to the first low-pressure oil passage T1 (second high-pressure oil passage T2) on the spool. Control window A2 on the valve body connects to the fourth transition oil passage T'4 (sixth transition oil passage T'6) on the spool, and control window B2 connects to the fifth transition oil passage T'5 (third transition oil passage T'3) on the spool. Control window A1 now connects to the spool's high-pressure oil passage, while control window B1 connects to the spool's low-pressure oil passage. The connected actuator is now flowing high-pressure oil on one side and low-pressure oil on the other. Both control windows A2 and B2 connect to the central transition oil passage in the spool. The oil pressures in control windows A2 and B2 are balanced, and the connected hydraulic actuator is in a depressurized state.

[0054] After the valve core continues to rotate 45 degrees clockwise relative to operating mode 2, the distribution valve switches to operating mode 3. At this point, control window A1 on the valve body connects to the eighth transition oil passage T'8 (tenth transition oil passage T'10) on the valve core, and control window B1 connects to the ninth transition oil passage T'9 (seventh transition oil passage T'7) on the valve core. Control window A2 on the valve body connects to the third low-pressure oil passage T3 (fourth low-pressure oil passage T4) on the valve core, and control window B2 connects to the fifth high-pressure oil passage P5 (sixth high-pressure oil passage P6) on the valve core. Both control windows A1 and B1 now connect to the central transition oil passage in the valve core. The oil pressures in control windows A1 and B1 are balanced, and the connected hydraulic actuator is in a depressurized state. Control window A2 connects to the low-pressure oil passage on the valve core, and control window B2 connects to the high-pressure oil passage on the valve core. The connected hydraulic actuator is in a low-pressure oil flow state on one side and a high-pressure return state on the other. And the movement direction of this actuator in this working mode is opposite to the movement direction in the next working mode.

[0055] After the valve core continues to rotate 45 degrees clockwise relative to operating mode three, the distribution valve switches to operating mode four. At this point, control window A1 on the valve body connects to the first low-pressure oil passage T1 (second low-pressure oil passage T2) on the valve core, and control window B1 connects to the third high-pressure oil passage P3 (fourth high-pressure oil passage P4) on the valve core. Control window A2 on the valve body connects to the fifth transition oil passage T'5 (third transition oil passage T'3) on the valve core, and control window B2 connects to the sixth transition oil passage T'6 (fourth transition oil passage T'4) on the valve core. At this point, control window A1 connects to the valve core's low-pressure oil passage, and control window B1 connects to the valve core's high-pressure oil passage. The connected actuator is in a state where low-pressure oil flows on one side and high-pressure oil flows on the other. The direction of motion of the actuator in this operating mode is opposite to that in operating mode two. At this time, the control window A2 and the control window B2 are both connected to the transition communication oil channel in the center of the valve core, the oil pressure of the control window A2 and the control window B2 is balanced, and the connected hydraulic actuator is in a pressure relief state.

[0056] As the valve core rotates, the distribution valve cycles through four operating modes, controlling the two actuators in different operating states. From operating mode one to mode four, the actuator connected to the second-level control window of the valve body operates in a cycle of pressure relief, forward movement, pressure relief, and reverse movement; the actuator connected to the third-level control window of the valve body operates in a cycle of forward movement, pressure relief, reverse movement, and pressure relief. The operating states of the actuators connected to the second and third levels always maintain a constant phase difference. The valve body is fixed, and the connection between the valve core and the valve body switches every 45 degrees of valve core rotation. There are eight sets of windows and oil passages connecting the valve core and the valve body, and the four operating modes can be divided according to the actuator's movement state.

[0057] The distribution valve controls the rotation angle of the valve core through the bottom gear set, transmits the angle information through mechanical transmission, realizes the automatic continuous motion output of the hydraulic actuator, and realizes periodic state switching.

Claims

1. A valve core rotating flow distribution rotary valve device, characterized in that: The invention comprises a valve core (2), a valve body (3), a sealing ring (4), an elastic retaining ring (5), a housing (6) and a gear set (7); the valve body (3) adopts a prismatic structure with a circular through hole in the middle, the cylindrical valve core (2) is located at the middle through hole of the valve body (3), the outer wall of the valve core (2) is sealed and connected to the inner periphery of the valve body (3) through the sealing ring (4), and the valve core (2) and the valve body (3) are coaxially arranged; the top / bottom end of the valve core (2) contacts the upper / lower ends of the valve body (3) through the elastic retaining ring (5), and the elastic retaining ring (5) is used to limit the valve core (2) Axial displacement relative to the valve body (3); the valve body (3) is fixedly mounted on the housing (6), a gear set (7) is provided inside the housing (6), the gear set (7) is connected to the bottom of the valve core (2) and is used to drive the valve core (2) to rotate around its own axis, a plurality of oil channels are provided in the valve core (2), and the oil channels of the valve core (2) are connected to the external hydraulic actuator through the window opened on the valve body (3); the position of the oil channel is controlled by the rotation of the valve core (2), thereby controlling the communication mode between the oil channel in the valve core (2) and the hydraulic actuator, thereby changing the working state of the hydraulic actuator; The valve core (2) is provided with an axial oil passage arranged along the axial direction of the valve core (2), and the axial oil passage mainly consists of two high-pressure communication oil passages (12), two low-pressure communication oil passages (23) and a transition communication oil passage (13). The transition communication oil passage (13) is located in the middle of the valve core (2), and the high-pressure communication oil passage (12) and the low-pressure communication oil passage (23) are provided around the transition communication oil passage (13); The valve core (2) is evenly provided with five layers of radial oil passages along its own axial direction. From top to bottom, the first layer is provided with an annular first layer annular high-pressure oil passage (19) and two first layer high-pressure input oil passages (9), and the two first layer high-pressure input oil passages (9) are both connected to the first layer annular high-pressure oil passage (19); the second layer is provided with two second layer high-pressure control oil passages (10), a cross-shaped second layer transition oil passage (15) and two second layer low-pressure control oil passages (20); the third layer is provided with two third layer high-pressure control oil passages (11), a cross-shaped third layer transition oil passage ( 16) and two third-layer low-pressure control oil passages (21); the fourth layer is provided with an annular fourth-layer annular low-pressure oil passage (17) and two fourth-layer low-pressure input oil passages (22), and the two fourth-layer low-pressure input oil passages (22) are both communicated with the fourth-layer annular low-pressure oil passage (17); the fifth layer is provided with an annular fifth-layer annular transition oil passage (18) and a fifth-layer transition oil passage (14), and the fifth-layer transition oil passage (14) is arranged along the radial direction of the valve core (2), and both ends of the fifth-layer transition oil passage (14) are communicated with the fifth-layer annular transition oil passage (18).

2. A valve core rotating flow distribution rotary valve device according to claim 1, characterized in that: The number and arrangement positions of the first layer high-pressure input oil passage (9), the second layer high-pressure control oil passage (10) and the third layer high-pressure control oil passage (11) are identical and aligned, and the first layer high-pressure input oil passage (9), the second layer high-pressure control oil passage (10) and the third layer high-pressure control oil passage (11) are all connected to the high-pressure communication oil passage (12); The outer periphery of the second-layer transition oil passage (15) and the third-layer transition oil passage (16) are both provided with four ports, and the arrangement positions of the ports in the second-layer transition oil passage (15) and the third-layer transition oil passage (16) are identical and aligned; the second-layer transition oil passage (15), the third-layer transition oil passage (16) and the fifth-layer transition oil passage (14) are all in communication with the transition communication oil passage (13); The number and arrangement positions of the second-layer low-pressure control oil passage (20), the third-layer low-pressure control oil passage (21) and the fourth-layer low-pressure input oil passage (22) are identical and aligned, and the second-layer low-pressure control oil passage (20), the third-layer low-pressure control oil passage (21) and the fourth-layer low-pressure input oil passage (22) are all connected to the low-pressure communication oil passage (23).

3. The valve core rotary flow distribution rotary valve device according to claim 1, characterized in that: The valve body (3) is a regular octagonal prism. Five layers of windows are evenly arranged on the side wall of the valve body (3) along its own axial direction. From top to bottom, the first layer is provided with a P high-pressure window (24), the second layer is provided with an A1 control window (29) and a B1 control window (27), the third layer is provided with an A2 control window (30) and a B2 control window (28), the fourth layer is provided with a T low-pressure window (25), and the fifth layer is provided with a T' transition window (26); The P high-pressure window (24) is connected to the first-layer annular high-pressure oil passage (19), and the P high-pressure window (24) is used to provide high-pressure oil for the valve core (2). The fourth-layer annular low-pressure oil passage (17) is connected to the T low-pressure window (25), and the low-pressure oil in the valve core (2) is connected to the external oil tank through the T low-pressure window (25). The fifth-layer annular transition oil passage (18) is connected to the T' transition window (26), and the T' transition window (26) is connected to the transition communication oil passage (13) through the fifth-layer transition oil passage (14), thereby balancing the oil pressure in the second-layer transition oil passage (15) / the third-layer transition oil passage (16); the hydraulic actuator includes two hydraulic cylinders, the A1 control window (29) and the B1 control window (27) are respectively connected to the two oil ports of one hydraulic cylinder, and the A2 control window (30) and the B2 control window (28) are respectively connected to the two oil ports of the other hydraulic cylinder.

4. The valve core rotating flow distribution rotary valve device according to claim 1, characterized in that: The two high-pressure communication oil passages (12) are symmetrically arranged about the central axis of the valve core (2), and the two low-pressure communication oil passages (23) are symmetrically arranged about the central axis of the valve core (2). The high-pressure communication oil passages (12) and the low-pressure communication oil passages (23) are located in the same circumferential direction of the valve core (2), and the high-pressure communication oil passages (12) and the low-pressure communication oil passages (23) are alternately arranged along the circumference of the valve core (2). Adjacent high-pressure communication oil passages (12) and low-pressure communication oil passages (23) are arranged at intervals of 90 degrees along the circumferential direction of the valve core (2).

5. The valve core rotating flow distribution rotary valve device according to claim 3, characterized in that: The P high-pressure window (24) and the T low-pressure window (25) are located on the same side of the valve body (3), the A1 control window (29) and the B1 control window (27) are arranged at intervals of 90 degrees along the circumferential direction of the valve body (3), the A2 control window (30) and the B2 control window (28) are arranged at intervals of 90 degrees along the circumferential direction of the valve body (3), and the A1 control window (29) and the A2 control window (30) are arranged at intervals of 45 degrees on the circumference of the valve body (3); the T' transition window (26) is not arranged on the same side of the valve body (3) as the other windows.

6. The valve core rotating flow distribution rotary valve device according to claim 3, characterized in that: The valve core (2) adjusts the communication state between the oil passage and the window in the valve body (3) by rotating itself, thereby changing the working state of the hydraulic actuator; the positions of the windows in each layer of the valve body (3) correspond to the positions of the radial oil passages in each layer of the valve core (2), and the oil passages of the valve core (2) and the windows in the valve body (3) include the following communication states: when the A1 control window (29) is connected to the second layer high-pressure control oil passage (10), the B1 control window (27) is connected to the second layer low-pressure control oil passage (20); when the A1 control window (29) is connected to the second layer low-pressure control oil passage (20), the B1 control window (27) is connected to the second layer high-pressure control oil passage (10); when the A1 control window (29) is connected to the second layer low-pressure control oil passage (20), the B1 control window (27) is connected to the second layer high-pressure control oil passage (10); ) is connected to one port in the second-layer transition oil passage (15), the B1 control window (27) is connected to another port in the second-layer transition oil passage (15); when the A2 control window (30) is connected to the third-layer high-pressure control oil passage (11), the B2 control window (28) is connected to the third-layer low-pressure control oil passage (21); when the A2 control window (30) is connected to the third-layer low-pressure control oil passage (21), the B2 control window (28) is connected to the third-layer high-pressure control oil passage (11); when the A2 control window (30) is connected to one port in the third-layer transition oil passage (16), the B2 control window (28) is connected to another port in the third-layer transition oil passage (16).

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