A two-dimensional proportional speed regulating valve

Abstract

When the oil pump is turned on, the oil filter presses on and off, forms a pressure regulating device, and the oil pumping presses on the injector, and the oil pumping presses on the injector cap, and the oil filter presses on the injector cap to regulate the flow of oil.

Description

Technical Field

[0001] The present invention relates to the field of fluid transmission and control, and in particular to a proportional speed regulating valve. Background Art

[0002] In traditional hydraulic systems, proportional speed control valves are typically paired with proportional solenoids and pressure compensation structures. However, the hydraulic forces generated by changes in output flow can cause the combined force on the valve core to vary, causing fluctuations in the opening length. The present invention proposes a two-dimensional proportional speed control valve that not only features an electromechanical converter to output a proportional control signal and a pressure-regulating structure with pressure compensation, but also incorporates a two-dimensional piston structure that introduces hydraulic pressure at both ends of the valve core. This enhances the rigidity of the valve core, mitigates the effects of hydraulic forces, reduces the impact of fluctuations in the opening length x on flow, and improves the stability of flow output. Summary of the Invention

[0003] The present invention aims to provide a two-dimensional proportional speed regulating valve, which can proportionally adjust the output flow and has better output flow stability.

[0004] The present invention is achieved through the following technical solutions: a two-dimensional proportional speed regulating valve, comprising an oil sleeve, a sealing end cover being provided at one end of the oil sleeve, a valve sleeve being provided within the oil sleeve, one end of the valve sleeve being flush with the bottom of the oil sleeve, and the other end being tightly pressed against the inner side wall of the sealing end cover, a valve core being provided within the valve sleeve, a drive assembly being provided on one side of the valve core, and a rebound device being provided on the other side thereof, and a pressure regulating device being provided between the valve sleeve and the oil sleeve;

[0005] The drive assembly includes a two-dimensional piston disposed on a sealing end cover. One end of the two-dimensional piston is connected to the valve core, and the other end extends to the outside of the valve sleeve and is connected to a drive source. The drive source adopts an electro-mechanical converter, which drives the two-dimensional piston to rotate and then drives the two-dimensional piston to move together.

[0006] The rebound device includes a piston cylinder, a piston rod connected to the valve core is provided in the piston cylinder, a piston spring is provided between the piston rod and the bottom of the piston cylinder, and the return spring can provide power for the return of the valve core after the valve core moves toward the piston cylinder;

[0007] The pressure regulating device includes a pressure regulating sleeve. A spring seat is provided on the side of the pressure regulating sleeve facing the sealing end cover. A pressure regulating spring is provided in the spring seat and is tightened against the inner wall of the sealing end cover. A cavity for installing the pressure regulating sleeve is reserved between the valve sleeve and the oil sleeve. The flow at the oil inlet and outlet is regulated by sliding the pressure regulating sleeve in the cavity.

[0008] Furthermore, the valve sleeve and the oil sleeve are fixedly connected, and the side walls of the valve sleeve and the oil sleeve are provided with an oil inlet and an oil outlet. The valve core is slidingly connected to the inner wall of the valve sleeve, and an annular groove is provided on the middle outer wall of the valve core. The annular groove is intermittently connected to the oil inlet and the oil outlet. During the reciprocating motion, the valve core can form a first-level throttling port through the intermittent connection between the sliding groove and the oil inlet and the oil outlet, thereby realizing the regulation of the oil inlet and oil outlet.

[0009] Furthermore, the pressure regulating sleeve is slidably connected to the outer wall of the valve sleeve and the inner wall of the oil sleeve, and the side wall of the regulating sleeve is provided with a through hole 1 and a through hole 2 which are intermittently connected to the oil inlet and the oil outlet respectively, and the inner wall of the regulating sleeve is provided with a sealing block located between the through hole 1 and the through hole 2, and both sides of the sealing block are provided with flow channels extending to the two ends of the pressure regulating sleeve respectively. After the pressure medium flows to the two ends of the regulating sleeve through the flow channel, a pressure difference is formed at the two ends of the regulating sleeve, and the regulating sleeve is driven by the pressure regulating spring to slide on the outer wall of the valve sleeve. During sliding, the through holes 1 and 2 on the regulating sleeve and the oil inlet and oil outlet between the valve sleeve and the oil sleeve form a secondary throttle port, and the flow of the primary throttle port is stabilized by the secondary throttle port. When the pressure at the oil inlet or outlet fluctuates, the pressure difference changes. Under the action of the pressure regulating spring, the pressure regulating sleeve moves, and the secondary throttle port formed with the oil sleeve changes, and the regulated pressure value restores the pressure difference, thereby playing a role of pressure compensation.

[0010] Furthermore, a limiting boss for installing the pressure regulating sleeve is provided on the outer wall of the valve sleeve. One end of the pressure regulating sleeve is fitted with the limiting boss, and the other end is fixedly connected to the spring seat. The setting of the limiting boss and the spring seat can limit the two ends of the adjusting seat.

[0011] Furthermore, a high-pressure oil hole connected to the outside is provided on the side wall of the piston cylinder, and an oil inlet channel connected to the high-pressure oil hole is provided on the side walls of the valve sleeve and the oil sleeve. After the high-pressure medium enters the piston cylinder through the high-pressure oil hole, the piston rod is pushed outward by the high-pressure medium, thereby pushing the valve core to move.

[0012] Furthermore, a low-pressure groove and a high-pressure groove are provided on the outer wall of the two-dimensional piston, a center hole distributed along the axial direction is provided in the two-dimensional piston, and a radial hole connected to the center hole is provided in the low-pressure groove. Through the arrangement of the low-pressure groove, the high-pressure groove and the center hole, the two-dimensional piston can move along with the axis when it rotates with the driving source.

[0013] The beneficial effects of the present invention are as follows: 1. The two-dimensional proportional speed control valve forms a primary throttle port through the annular groove on the valve core and the oil inlet and outlet ports on the valve sleeve, and forms a secondary throttle port through the pressure regulating sleeve. The output flow is proportionally adjusted by the mutual cooperation of the primary throttle port and the secondary throttle port, thereby improving the stability of the pressure medium during inflow and outflow. The secondary throttle port can maintain the pressure at the primary throttle port while performing the secondary adjustment, further improving the stability of the flow output;

[0014] 2. The force exerted by the piston rod and the two-dimensional piston acts together on the valve core, which improves the rigidity of the valve core, makes the valve core have good ability to resist transient forces, and stabilizes the flow rate of the opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the two-dimensional piston in the present invention.

[0017] Among them: 1- oil sleeve; 2- sealing end cover; 3- valve sleeve; 4- valve core; 5- two-dimensional piston; 6- driving source; 7- piston cylinder; 8- piston rod; 9- piston spring; 10- pressure regulating sleeve; 11- spring seat; 12- pressure regulating spring; 13- oil inlet; 14- oil outlet; 15- annular groove; 16- through hole 1; 17- through hole 2; 18- sealing block; 19- flow channel; 20- limiting boss; 21- high-pressure oil hole; 22- low-pressure groove; 23- high-pressure groove; 24- center hole; 25- radial hole. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figure 1-2As shown, a two-dimensional proportional speed regulating valve includes an oil sleeve 1, a sealing end cover 2 is provided at one end of the oil sleeve 1, a valve sleeve 3 is provided in the oil sleeve 1, one end of the valve sleeve 3 is flush with the bottom of the oil sleeve 1, and the other end is tightly pressed against the inner wall of the sealing end cover 2, a valve core 4 is provided in the valve sleeve 3, a drive assembly is provided on one side of the valve core 4, and a rebound device located in the valve sleeve 3 is provided on the other side, and a pressure regulating device is provided between the valve sleeve 3 and the oil sleeve 1;

[0022] The driving assembly includes a two-dimensional piston 5 provided on the sealing end cover 2. One end of the two-dimensional piston 5 is connected to the valve core 4, and the other end extends to the outside of the valve sleeve 3 and is connected to the driving source 6. The driving source 6 adopts an electro-mechanical converter, which drives the two-dimensional piston 5 to rotate and then drives the two-dimensional piston 5 to move together.

[0023] The rebound device includes a piston cylinder 7, in which a piston rod 8 connected to the valve core 4 is provided. A piston spring 9 is provided between the piston rod 8 and the bottom of the piston cylinder 7. The return spring can provide power for the return of the valve core 4 after the valve core 4 moves toward the piston cylinder 7.

[0024] The pressure regulating device includes a pressure regulating sleeve 10. A spring seat 11 is provided on the side of the pressure regulating sleeve 10 facing the sealing end cover 2. A pressure regulating spring 12 is provided in the spring seat 11 and is pressed tightly against the inner wall of the sealing end cover 2. A cavity for installing the pressure regulating sleeve 10 is reserved between the valve sleeve 3 and the oil sleeve 1. The flow at the oil inlet 13 and the oil outlet 14 is regulated by sliding the pressure regulating sleeve 10 in the cavity.

[0025] The valve sleeve 3 is fixedly connected to the oil sleeve 1, and the side walls of the valve sleeve 3 and the oil sleeve 1 are both provided with an oil inlet 13 and an oil outlet 14. The valve core 4 is slidingly connected to the inner wall of the valve sleeve 3, and an annular groove 15 is provided on the middle outer wall of the valve core 4. The annular groove 15 is intermittently connected to the oil inlet 13 and the oil outlet 14. During the reciprocating motion, the valve core 4 can form a first-level throttling port through the intermittent connection with the oil inlet 13 and the oil outlet 14 through the sliding groove, thereby realizing the regulation of the oil inlet and oil outlet.

[0026] The pressure regulating sleeve 10 is connected to the outer wall of the valve sleeve 3 and the inner wall of the oil sleeve 1 in a sliding manner. The side wall of the regulating sleeve is provided with a through hole 16 and a through hole 2 17 which are intermittently connected to the oil inlet 13 and the oil outlet 14 respectively. The inner wall of the regulating sleeve is provided with a sealing block 18 located between the through hole 16 and the through hole 2 17. Both sides of the sealing block 18 are provided with flow channels 19 which extend to the two ends of the pressure regulating sleeve 10 respectively. After the pressure medium flows to the two ends of the regulating sleeve through the flow channel 19, a pressure difference is formed at the two ends of the regulating sleeve, which cooperates with the pressure regulating spring 12 to bring The dynamic regulating sleeve slides on the outer wall of the valve sleeve 3. When sliding, the through hole 16 and the through hole 2 17 on the regulating sleeve form a secondary throttle port at the oil inlet 13 and the oil outlet 14 between the valve sleeve 3 and the oil sleeve 1. The flow of the primary throttle port is stabilized by the secondary throttle port. When the pressure of the oil inlet 13 or the oil outlet 14 fluctuates, the pressure difference changes. Under the action of the pressure regulating spring 12, the pressure regulating sleeve 10 moves, and the secondary throttle port formed with the oil sleeve 1 changes. The pressure value is adjusted to restore the pressure difference, thereby playing a role in pressure compensation.

[0027] A limiting boss 20 for installing the pressure regulating sleeve 10 is provided on the outer wall of the valve sleeve 3. One end of the pressure regulating sleeve 10 is in contact with the limiting boss 20, and the other end is fixedly connected to the spring seat 11. The setting of the limiting boss 20 and the spring seat 11 can limit the two ends of the adjusting seat.

[0028] A high-pressure oil hole 21 connected to the outside is provided on the side wall of the piston cylinder 7, and an oil inlet channel connected to the high-pressure oil hole 21 is provided on the side walls of the valve sleeve 3 and the oil sleeve 1. After the high-pressure medium enters the piston cylinder 7 through the high-pressure oil hole 21, the piston rod 8 is pushed outward by the high-pressure medium, thereby pushing the valve core 4 to move.

[0029] A low-pressure groove 22 and a high-pressure groove 23 are provided on the outer wall of the two-dimensional piston 5. A center hole 24 distributed along the axial direction is provided in the two-dimensional piston 5. A radial hole 25 connected to the center hole 24 is provided in the low-pressure groove 22. Through the arrangement of the low-pressure groove 22, the high-pressure groove 23 and the center hole 24, the two-dimensional piston 5 can move along with the axis when it rotates with the driving source 6.

[0030] Operating Principle: The working medium flows through the oil inlet 13, through the oil sleeve 1, the pressure regulating sleeve 10, and the valve sleeve 3, reaching the valve port of the valve core 4. Then, it flows through the valve sleeve 3, the pressure regulating sleeve 10, and the oil sleeve 1 and out through the oil outlet 14. At the same time, the working medium flows into the cavity of the piston cylinder 7. When the electro-mechanical converter inputs a proportional signal, the two-dimensional piston 5 moves along its axis, pushing the valve core 4 along its axis, causing the opening ratio formed by the valve core 4 and the valve sleeve 3 to change, forming a primary throttle, which can change the flow rate of the working medium. The pressures before and after the primary throttle are introduced at both ends of the pressure-regulating sleeve 10. The pressure difference acts on the pressure-regulating spring 12, making the pressure difference before and after the primary throttle consistent with the pre-set spring value. This keeps the pressure drop of the primary throttle constant and stabilizes the flow rate of the primary throttle. When the pressure at the oil inlet 13 or oil outlet 14 fluctuates, the pressure difference changes. Under the action of the pressure-regulating spring 12, the pressure-regulating sleeve 10 moves, and the secondary throttle formed with the oil sleeve 1 changes. The pressure value is adjusted to restore the pressure difference, thus playing a role in pressure compensation. At the same time, the piston rod 8 and the two-dimensional piston 5 exert a force on the valve core 4, increasing the rigidity of the valve core 4, making the valve core 4 have good resistance to transient forces and stabilizing the flow rate of the opening.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-dimensional proportional speed regulating valve, characterized by: It includes an oil sleeve, one end of which is provided with a sealing end cover, a valve sleeve is provided in the oil sleeve, a valve core is provided in the valve sleeve, a drive assembly is provided on one side of the valve core, and a rebound device is provided on the other side, and a pressure regulating device is provided between the valve sleeve and the oil sleeve; The valve sleeve and the oil sleeve are fixedly connected, and the side walls of the valve sleeve and the oil sleeve are both provided with an oil inlet and an oil outlet. The valve core is slidably connected to the inner side wall of the valve sleeve, and an annular groove is provided on the middle outer side wall of the valve core. The annular groove is intermittently connected to the oil inlet and the oil outlet; The driving assembly includes a two-dimensional piston arranged on the sealing end cover, one end of the two-dimensional piston is connected to the valve core, and the other end extends to the outside of the valve sleeve and is connected to the driving source; A low-pressure groove and a high-pressure groove are provided on the outer wall of the two-dimensional piston, a central hole distributed along the axial direction is provided in the two-dimensional piston, and a radial hole communicating with the central hole is provided in the low-pressure groove; The rebound device includes a piston cylinder, a piston rod connected to the valve core is provided in the piston cylinder, and a piston spring is provided between the piston rod and the bottom of the piston cylinder; The pressure regulating device comprises a pressure regulating sleeve, a spring seat is provided on the side of the pressure regulating sleeve facing the sealing end cover, and a pressure regulating spring is provided in the spring seat and is pressed against the inner side wall of the sealing end cover.

2. A two-dimensional proportional speed regulating valve according to claim 1, characterized in that: The pressure regulating sleeve is slidably connected to the outer wall of the valve sleeve and the inner wall of the oil sleeve. The side wall of the pressure regulating sleeve is provided with a through hole 1 and a through hole 2 which are intermittently connected to the oil inlet and the oil outlet respectively.

3. A two-dimensional proportional speed regulating valve according to claim 2, characterized in that: The inner side wall of the pressure regulating sleeve is provided with a sealing block located between the first through hole and the second through hole, and both sides of the sealing block are provided with flow channels extending to the two ends of the pressure regulating sleeve respectively.

4. A two-dimensional proportional speed regulating valve according to claim 2, characterized in that: A limiting boss for mounting a pressure regulating sleeve is provided on the outer side wall of the valve sleeve. One end of the pressure regulating sleeve is fitted with the limiting boss, and the other end is fixedly connected to the spring seat.

5. The two-dimensional proportional speed regulating valve according to claim 1, characterized in that: A high-pressure oil hole communicating with the outside is provided on the side wall of the piston cylinder, and an oil inlet channel communicating with the high-pressure oil hole is provided on the side walls of the valve sleeve and the oil sleeve.

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