Oil way on-off control device and control method

Abstract

The invention relates to the technical field of hydraulic pumps, in particular to an oil way on-off control device and method. The oil way on-off control device comprises a valve seat, a valve body, a valve element, a spring and two electromagnets, the two electromagnets are located on the left side and the right side of the valve seat correspondingly, the valve body is embedded in the valve seat, the valve element is installed in the valve body, and the two ends of the valve element sequentially penetrate through the valve body and the valve seat to be located in the electromagnet area. Springs are wound outside the two ends, located in the valve seat, of the valve element, precise flow distribution of a communicating hole channel and a radial hole group of the valve body is preset in the valve element, when the electromagnet drives the valve element to move left and right, communication and disconnection of an oil inlet and a target outlet are synchronously completed, and an oil way interruption window for serial opening and closing of a traditional valve is eliminated. According to the device, the functions of oil inlet distribution, outlet selection and oil return management are integrated in the valve seat-valve body-valve element assembly which is coaxially nested, crossed external pipelines are omitted, high integration is achieved, and the size of the device is reduced.

Description

Technical Field

[0001] This invention relates to the field of hydraulic pump technology, specifically to an oil circuit on / off control device and control method. Background Technology

[0002] As the power component of the aircraft hydraulic system, the hydraulic pump converts mechanical energy into hydraulic energy. In the aircraft hydraulic system, actuators (such as servos and actuators) and pressure regulating mechanisms often need to dynamically switch the high-pressure oil (3000-5000psi) from a single pump source to different outlets. Traditional solutions use separate valve groups to achieve oil circuit distribution, but they have core defects such as delayed switching response leading to oil circuit interruption and pressure fluctuation, high leakage rate of multi-valve sealing structure, complex pipeline topology occupying too much space, and reliance on secondary valve action for emergency switching, which seriously restrict the reliability of the system and flight safety.

[0003] To overcome the above problems, there is an urgent need for a highly integrated multi-outlet switching device that can achieve zero-window switching from a single inlet to multiple outlets, minimize sealing paths, and simplify topology design, so as to meet the stringent requirements of aviation hydraulic systems for instantaneous response, compact layout, and redundancy tolerance. Summary of the Invention

[0004] To address the problems of existing technologies, this invention proposes an oil circuit on / off control device and control method, the specific solution of which is as follows:

[0005] An oil circuit on / off control device includes: a valve seat, a valve body, a valve core, a spring, and two electromagnets. The two electromagnets are located on the left and right sides of the valve seat, respectively. A cylindrical hole is formed along the axis in the middle of the valve seat. The valve body is fitted into the cylindrical hole in the valve seat. A cylindrical hole is formed along the axis in the middle of the valve body. The valve core is installed in the cylindrical hole in the valve body. The outer diameters of the two ends of the valve core are smaller than the outer diameter of the middle section. The middle section of the valve core is in contact with the inner wall of the valve body. The two ends of the valve core pass through the valve body and the valve seat in sequence, located within the electromagnet area. Springs are wound around the smaller outer diameter ends of the valve core inside the valve seat. The two ends of the valve seat are sealed. The upper end face of the valve seat has three oil ports from left to right: a return oil port T1, an inlet oil port P, and a return oil port T2. The P port branches into three oil ports inside the valve seat. The lower end face of the valve seat has three oil outlet ports from left to right: a port P3, a port P1, and a port P2. The valve body has holes A and B from left to right. Holes C, D, E, F, and G are radially through holes in the valve body. From left to right, the middle section of the valve core's large outer diameter has non-through annular holes a, b, c, d, and e on its outer circumference. Holes a and b are connected internally within the valve core, as are holes d and e. Hole c is radially through. Hole A connects to port T1. Hole B corresponds to the area between holes a and b and connects to port P3. Hole C is located to the right of hole b and connects to the leftmost oil port branching off from port P. Hole D connects to hole c, the middle oil port branching off from port P, and port P1. Hole E is located to the left of hole d and connects to the rightmost oil port branching off from port P. Hole F corresponds to the area between holes d and e and connects to port P2. Hole G connects to T2. Holes A and G correspond to the two ends of the valve core's small outer diameter, and the space between the two ends of the valve core's small outer diameter forms a return oil tank.

[0006] Furthermore, the valve seat, valve body, and valve core are all cylindrical.

[0007] Furthermore, a screw plug is installed at one end of the valve seat, and the screw plug is sealed to the valve seat by a second sealing ring. The two ends of the small outer diameter of the valve core pass through the valve seat and the screw plug respectively and are sealed by the first sealing ring.

[0008] Furthermore, annular sealing rings are installed between holes A and B, between holes B and C, between holes E and F, and between holes F and G.

[0009] Furthermore, an annular countersunk hole is provided on the valve body, and a through hole that runs radially through the valve body communicates with the annular countersunk hole near the outer cylindrical surface.

[0010] Furthermore, the passages between holes a and b inside the valve core are intersecting passages, as are the passages between holes d and e inside the valve core.

[0011] Furthermore, a return oil T-port is provided on the lower end face of the valve seat, and the T-port is connected to the hole G.

[0012] The control method of the above-mentioned oil circuit on / off control device maintains that the electromagnets on both sides of the valve seat are not energized, the valve core is kept in the neutral position in the oil circuit on / off control device, the P port is connected to the P1 port through holes D and c, the valve core isolates the hole C on the valve body from the hole b on the valve core, isolates the hole E on the valve body from the hole d on the valve core, and disconnects the P port from the P3 and P2 ports, thus realizing the oil circuit connection from P to P1; the electromagnets on both sides of the valve seat are the left electromagnet and the right electromagnet, respectively, maintaining... When the left electromagnet is de-energized and the right electromagnet is energized to generate thrust, the valve core moves to the left and is in the left position. Port P is connected to port P2 through holes E, d, and e, while port P is disconnected from ports P3 and P1, thus achieving oil circuit connection from P to P2. When the right electromagnet is de-energized and the left electromagnet is energized to generate thrust, the valve core moves to the right and is in the right position. Port P is connected to port P3 through holes C, b, and a, while port P is disconnected from ports P1 and P2, thus achieving oil circuit connection from P to P3.

[0013] This invention achieves precise flow distribution between the pre-set connecting channels (ab, de) inside the valve core and the radial holes in the valve body. When the valve core is moved left and right by the electromagnet, the connection / disconnection of the oil inlet P and the target outlets P1 / P2 / P3 is completed synchronously, eliminating the oil circuit interruption window of traditional valve serial opening and closing and avoiding actuator vibration caused by hydraulic shock. Furthermore, when both electromagnets are de-energized, the spring forces the valve core to automatically reset to the neutral position, unconditionally connecting the P→P1 channel, which can serve as the main control oil circuit, reducing switching time. Additionally, this invention relies solely on a single sliding sealing interface between the middle section of the valve core and the inner wall of the valve body to control all high-pressure oil circuits, and annular sealing rings are installed between the oil circuits to reduce oil leakage. Moreover, this device integrates the functions of oil inlet distribution (P-port branching), outlet selection (P1 / P2 / P3), and return oil management (T1 / T2) into a coaxially nested valve seat-valve body-valve core assembly, eliminating intersecting external pipelines, achieving high integration, and reducing the size of the device. Attached Figure Description

[0014] The embodiments of the present invention will be further described below with reference to the accompanying drawings, wherein:

[0015] Figure 1 A cross-sectional view of the valve core in the oil circuit on / off control device of the embodiment when it is in the neutral position is shown.

[0016] Figure 2 A cross-sectional view of the valve core in the oil circuit on / off control device of the embodiment is shown when it is in the left position.

[0017] Figure 3 A cross-sectional view of the valve core in the oil circuit on / off control device of the embodiment is shown.

[0018] Wherein, 1-left electromagnet; 2-first sealing ring; 3-valve core; 4-valve body; 5-spring, 5-1 left spring, 5-2 right spring; 6-valve seat; 7-annular sealing ring; 8-second sealing ring; 9-screw plug; 10-right electromagnet; Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] In one embodiment, an oil circuit on / off control device includes: a valve seat 6, a valve body 4, a valve core 3, a spring 5, and two electromagnets. The valve seat 6, valve body 4, and valve core 3 are all metal cylinders. The two electromagnets are located on the left and right sides of the valve seat 6, respectively. A cylindrical hole is formed along the axis in the middle of the valve seat 6. The valve body 4 is fitted into the cylindrical hole in the valve seat 6. A cylindrical hole is formed along the axis in the middle of the valve body 4. The valve core 3 is installed in the cylindrical hole in the valve body 4. The outer diameters of the two ends of the valve core 3 are smaller than the outer diameter of the middle section. The middle section of the valve core 3 is in contact with the inner wall of the valve body 4. The two ends of the valve core 3 pass through the valve body 4 and the valve core 5 in sequence. The valve seat 6 is located within the electromagnet area. The valve core 3 is located inside the valve seat 6, with springs 5 ​​wound around both ends of its small outer diameter. The left spring is 5-1, and the right spring is 5-2. A screw plug 9 is installed at one end of the valve seat 6, and the screw plug 9 is sealed to the valve seat 6 by a second sealing ring 8. The two ends of the small outer diameter of the valve core 3 pass through the valve seat 6 and the screw plug 9 respectively, and are both sealed by the first sealing ring 2. The upper surface of the valve seat 6 has three oil ports from left to right: a return oil port (T1), an inlet oil port (P), and a return oil port (T2). The P port branches into three oil ports inside the valve seat 6. The lower surface of the valve seat 6 has three oil ports from left to right: a P3 port, a P4 port, and a P5 port. The valve body 4 has three oil outlets: P1 and P2. From left to right, the valve body 4 has holes A, B, C, D, E, F, and G. These holes are radially through holes. The valve body 4 also has an annular countersunk hole. The radially through holes in the valve body 4 connect with the annular countersunk hole near the outer cylindrical surface. The valve core 3 has, from left to right, non-intersecting, annular (groove) holes a, b, c, d, and e on its outer circumference in the middle section of its large outer diameter. Holes a and b are connected within the valve core 3 via a passageway, and holes d and e are also connected within the valve core 3 via a passageway. All passageways are intersecting. It can also be other shapes that allow for communication. Hole c is radially through; hole A is connected to port T1; hole B corresponds to the area between holes a and b, and is connected to port P3; hole C is located to the right of hole b and is connected to the leftmost oil port branching off from port P; hole D is connected to hole c, the middle oil port branching off from port P, and port P1; hole E is located to the left of hole d and is connected to the rightmost oil port branching off from port P; hole F corresponds to the area between holes d and e, and is connected to port P2; hole G is connected to T2; holes A and G correspond to the two ends of the small outer diameter of valve core 3, and the space between the two ends of the small outer diameter of valve core 3 forms the return oil tank. Annular sealing rings 7 are installed between holes A and B, between holes B and C, between holes E and F, and between holes F and G. Sealing rings 7 are used for communication between adjacent holes; screw plugs 9 are used for limiting and fixing valve body 4; and sealing rings 2 are used to seal the return oil to prevent external leakage.

[0021] In one embodiment, an oil circuit on / off control device is connected to a pressure regulating mechanism. The lower end face of the valve seat 6 of the oil circuit on / off control device also has a return oil port T, which communicates with the orifice G. The three oil outlets of the oil circuit on / off control device (P3, P1, and P2) are connected to the oil inlets of the three different regulating pressure chambers of the pressure regulating mechanism, and the return oil port T of the oil circuit on / off control device is connected to the return oil port of the pressure regulating mechanism. The on / off state of the high-pressure outlet oil circuit and the corresponding chamber for the required pressure regulation can be controlled in real time according to the pressure requirements of the variable pump multi-stage pressure regulating control device. To ensure high-pressure operation, the high-pressure outlet oil circuit of the hydraulic pump is connected to the corresponding high-pressure chamber of the multi-stage pressure regulation and control device under high-pressure load flight conditions, providing high pressure to the hydraulic system. Under low-pressure load flight conditions, the high-pressure outlet oil circuit of the hydraulic pump is connected to the corresponding low-pressure chamber of the multi-stage pressure regulation and control device, providing low pressure to the hydraulic system. At startup, the high-pressure outlet oil circuit of the hydraulic pump is connected to the corresponding lowest pressure chamber of the multi-stage pressure regulation and control device, and the hydraulic pump operates at the lowest pressure, enabling the hydraulic pump to start with the lowest power loss mode, reducing the engine startup burden and onboard power supply.

[0022] A control method for the above-mentioned oil circuit on / off control device has the following three states:

[0023] (1) The electromagnets on both sides of the valve seat 6 are the left electromagnet 1 and the right electromagnet 10 respectively. The left electromagnet 1 and the right electromagnet 10 are kept unenergized. The valve core 3 is kept in the neutral position in the oil circuit on / off control device. The P port is connected to the P1 port through the holes D and c. The valve core 3 isolates the hole C on the valve body 4 from the hole b on the valve core 3, and isolates the hole E on the valve body 4 from the hole d on the valve core 3. The P port is disconnected from the P3 port and the P2 port, so that the oil circuit from P to P1 is connected.

[0024] (2) The electromagnets on both sides of the valve seat 6 are the left electromagnet 1 and the right electromagnet 10 respectively. The left electromagnet 1 is kept unenergized, and the right electromagnet 10 is energized to generate thrust. The valve core 3 moves to the left and is in the left position. The P port is connected to the P2 port through the holes E, d, and e. The P port is disconnected from the P3 port and the P1 port, so that the oil passage from P to P2 is connected.

[0025] (3) The electromagnets on both sides of the valve seat 6 are the left electromagnet 1 and the right electromagnet 10 respectively. The right electromagnet 10 is kept unenergized, and the left electromagnet 1 is energized to generate thrust. The valve core 3 moves to the right and is in the right position. The P port is connected to the P3 port through the holes C, b, and a. The P port is disconnected from the P1 port and the P2 port, so that the oil circuit from P to P3 is connected.

[0026] The foregoing descriptions have outlined some exemplary embodiments of the present invention. It is understood that these embodiments are merely illustrative and do not constitute a limitation on the scope of protection of the present invention. Features in these embodiments can be rearranged in suitable ways, and the resulting solutions remain within the scope of protection claimed by the present invention. All other embodiments obtained by those skilled in the art based on the foregoing embodiments without inventive effort, i.e., all modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by the present invention.

Claims

1. A hydraulic circuit on / off control device, characterized in that, include: The valve consists of a valve seat (6), a valve body (4), a valve core (3), a spring (5), and two electromagnets. The two electromagnets are located on the left and right sides of the valve seat (6). A cylindrical hole is opened in the middle of the valve seat (6) along the axis. The valve body (4) is fitted into the cylindrical hole of the valve seat (6). A cylindrical hole is opened in the middle of the valve body (4) along the axis. The valve core (3) is installed in the cylindrical hole of the valve body (4). The outer diameters of the two ends of the valve core (3) are smaller than the outer diameter of the middle section. The middle section of the valve core (3) is flush with the inner wall of the valve body (4). The valve core (3) is fitted together, with its two ends passing through the valve body (4) and valve seat (6) in sequence within the electromagnet area. Springs (5) are wound around both ends of the small outer diameter of the valve core (3) inside the valve seat (6), and the valve seat (6) is sealed at both ends. The upper surface of the valve seat (6) has three oil ports from left to right: a return oil port (T1), an inlet oil port (P), and a return oil port (T2). The P port is branched into three oil ports inside the valve seat (6). The lower surface of the valve seat (6) has three outlet ports from left to right: a P3 port, a P1 port, and a P2 port. Oil port; The valve body (4) has holes A, B, C, D, E, F, and G respectively from left to right. The holes in the valve body (4) are radially through holes; The valve core (3) has annular holes a, b, c, d, and e respectively from left to right on the outer circumference of the middle section of the large outer diameter. Holes a and b are connected inside the valve core (3), and holes d and e are connected inside the valve core (3). Hole c is radially through; Hole A is connected to port T1, and hole B is connected to port T1. Between holes a and b, hole B is connected to port P3, hole C is located to the right of hole b and is connected to the leftmost oil port branching off from port P, hole D is connected to hole c, the middle oil port branching off from port P, and P1, hole E is located to the left of hole d and is connected to the rightmost oil port branching off from port P, hole F corresponds to between holes d and e, hole F is connected to port P2, hole G is connected to T2, holes A and G correspond to the two ends of the small outer diameter of valve core (3), and the space at the two ends of the small outer diameter of valve core (3) forms the return oil tank.

2. The oil circuit on / off control device according to claim 1, characterized in that, The valve seat (6), valve body (4), and valve core (3) are all cylindrical.

3. The oil circuit on / off control device according to claim 1, characterized in that, A screw plug (9) is installed at one end of the valve seat (6). The screw plug (9) and the valve seat (6) are sealed by a second sealing ring (8). The two ends of the small outer diameter of the valve core (3) pass through the valve seat (6) and the screw plug (9) respectively and are sealed by a first sealing ring (2).

4. The oil circuit on / off control device according to claim 1, characterized in that, An annular sealing ring (7) is installed between holes A and B, between holes B and C, between holes E and F, and between holes F and G.

5. The oil circuit on / off control device according to claim 1, characterized in that, The valve body (4) is also provided with an annular countersunk hole, and the through hole in the valve body (4) that runs radially through it is connected to the annular countersunk hole near the outer cylindrical surface.

6. The oil circuit on / off control device according to claim 1, characterized in that, The passages opened by holes a and b inside the valve core (3) are intersecting passages, and the passages opened by holes d and e inside the valve core (3) are also intersecting passages.

7. The oil circuit on / off control device according to claim 1, characterized in that, The lower end face of the valve seat (6) is also provided with an oil return T port, which is connected to the hole G.

8. A control method for an oil circuit on / off control device according to any one of claims 1-7, characterized in that, Keep the electromagnets on both sides of the valve seat (6) de-energized, and keep the valve core (3) in the neutral position in the oil circuit on / off control device. The P port is connected to the P1 port through holes D and c. The valve core (3) isolates the hole C on the valve body (4) from the hole b on the valve core (3), and isolates the hole E on the valve body (4) from the hole d on the valve core (3). The P port is disconnected from the P3 port and the P2 port, realizing the oil circuit from P to P1. The electromagnets on both sides of the valve seat (6) are the left electromagnet (1) and the right electromagnet (10) respectively. Keep the left electromagnet (1) and the right electromagnet (10) in the neutral position in the oil circuit on / off control device. When the electromagnet (1) is not energized, the right electromagnet (10) is energized to generate thrust, the valve core (3) moves to the left and is in the left position, the P port is connected to the P2 port through holes E, d, and e, and the P port is disconnected from the P3 port and the P1 port, thus realizing the oil circuit connection from P to P2; when the right electromagnet (10) is not energized, the left electromagnet (1) is energized to generate thrust, the valve core (3) moves to the right and is in the right position, the P port is connected to the P3 port through holes C, b, and a, and the P port is disconnected from the P1 port and the P2 port, thus realizing the oil circuit connection from P to P3.

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