High-speed switch valve with rotary valve element

Abstract

The invention discloses a high-speed switch valve with a rotary valve element. The high-speed switch valve comprises a valve body and the valve element. The valve body is provided with a left end cover and a right end cover, the valve element is rotationally connected with the end covers, a first oil outlet, a second oil outlet, a first oil return opening, a second oil return opening and an oil inlet are formed in the valve body, and an annular groove communicated with the first oil return opening, the second oil return opening and the oil inlet is formed in the valve body; the valve element is driven by an external motor to rotate. A plurality of rectangular oil guide grooves are formed in the valve element and correspondingly communicated with the first oil outlet, the second oil outlet and the annular grooves respectively, and the rectangular oil guide grooves are matched with the first oil outlet, the second oil outlet and the annular grooves to achieve high-frequency reversing of pressure oil between the oil outlets and the oil return opening. The annular grooves communicated with the oil inlet and the oil return opening are formed in the valve body, so that the machining number of the annular grooves of the valve element is remarkably reduced, the overall strength of the valve element is remarkably improved, and the working stability of the switching valve is improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic equipment technology. More specifically, this invention relates to a high-speed rotary valve. Background Technology

[0002] High-speed switching valves are key components of fluid control systems, and their performance directly affects the dynamic response and accuracy of hydraulic, pneumatic, and fuel systems. Traditional linear motion high-speed switching valves (such as solenoid spool valves) are limited by mechanical inertia and friction, making it difficult to meet the requirements of high-frequency, high-precision control. To overcome this limitation, rotary valves are used instead of linear motion high-speed switching valves. Rotary valves significantly reduce valve core inertia, which not only greatly increases the operating frequency but also significantly reduces wear and extends service life. Therefore, they are widely used in hydraulic diaphragm hydrogen compressors.

[0003] The rotary high-speed switching valve currently used in hydraulic diaphragm hydrogen compressors mainly consists of a valve core and a valve sleeve. The valve core has an annular oil guide groove. Although the annular oil guide groove can significantly reduce the valve core inertia, it has the following shortcomings: 1) Excessive slotting in the valve core, with the annular oil guide groove severely weakening the overall strength of the valve core and reducing its overall operational stability; 2) Uneven radial load distribution along the axial direction of the valve core can easily cause uneven loading of the valve core, affecting the working stability of the rotary valve; 3) The negative opening (positive covering) design is adopted, and each reversing process is accompanied by a large pressure impact. At the same time, under the influence of water hammer effect, the working stability of the entire hydraulic system is greatly reduced. 4) Abrupt changes at the valve port interface can easily cause large pressure and flow step responses. Summary of the Invention

[0004] Another objective of this invention is to provide a high-speed rotary valve that significantly reduces the number of valve core annular grooves to be machined, significantly improves the overall strength of the valve core, and enhances the working stability of the switching valve.

[0005] To achieve these objectives and other advantages according to the present invention, a high-speed switching valve with a valve core rotary type is provided, comprising a valve body and a valve core disposed inside the valve body; The valve body is equipped with a left end cover and a right end cover at both ends, and the valve core is rotatably connected to the left end cover and the right end cover at both ends. The valve body is provided with a first oil outlet, a second oil outlet, a first oil return port, a second oil return port, and an oil inlet. The oil inlet is located between the first oil return port and the second oil return port. The valve body is provided with a plurality of annular grooves along its axial direction, which are respectively connected to the first oil return port, the second oil return port, and the oil inlet. The oil inlet is connected to an external high-pressure pump station. The first oil outlet and the second oil outlet are respectively connected to the oil chamber of an external diaphragm head. The first oil return port and the second oil return port are connected to an external oil tank. One side of the valve core passes through the corresponding end cap and is connected to an external motor, which drives the rotation. The valve core is provided with multiple rectangular oil guide grooves, which are respectively connected to the first oil outlet, the second oil outlet, and multiple annular grooves. The multiple rectangular oil guide grooves cooperate with the first oil outlet, the second oil outlet, and multiple annular grooves to realize high-frequency switching of pressure oil between the oil outlet and the return oil outlet.

[0006] Preferably, the valve core is further provided with a plurality of pressure equalization grooves, which are spaced apart along the axial direction of the valve core. Any pressure equalization groove is provided along the circumference of the valve core. The pressure equalization groove is not connected to the first oil outlet, the second oil outlet, the first oil return port, the second oil return port and the oil inlet.

[0007] Preferably, triangular transition grooves are symmetrically provided on both sides of one end of the rectangular oil guide groove that is connected to the oil inlet via an annular groove.

[0008] Preferably, the first oil outlet, the second oil outlet, the first oil return port, the second oil return port, and the oil inlet are all rectangular openings.

[0009] Preferably, the circumferential angles of the valve body corresponding to the first and second oil outlets are coaxially aligned with the circumferential groove angles of the corresponding rectangular oil guide grooves on the valve core. When the valve core is in the initial neutral position, the throttling edge of the rectangular oil guide groove has no circumferential interval angle and no radial overlap with the rectangular opening edges of the first and second oil outlets, so as to form a zero-coverage fit.

[0010] Preferably, the first oil return port, the second oil return port, and the oil inlet are arranged at 90° to each other in the circumferential direction of the valve body, and the oil inlet is arranged at 180° to the first oil outlet and the second oil outlet in the circumferential direction of the valve body.

[0011] Preferably, the width and depth of the rectangular oil guide groove are both 0.5 mm.

[0012] Preferably, the inner circumference of the valve body and the outer circumference of the valve core are in clearance fit.

[0013] Preferably, a sealing ring is embedded at the connection between the valve core and the left and right end caps.

[0014] The present invention has at least the following beneficial effects: By opening annular grooves on the valve body that communicate with the oil inlet and return ports, the present invention significantly reduces the number of valve core annular grooves to be machined, significantly improves the overall strength of the valve core, and improves the working stability of the switching valve; by opening multiple pressure equalizing grooves on the valve core to effectively balance the circumferential / radial forces on the valve core, the present invention reduces the risk of valve core off-center loading, avoids valve core jamming, and improves the service life of the valve core; by opening triangular transition grooves on the rectangular guide groove communicating with the oil inlet, the present invention can effectively reduce the step response of pressure and flow, so that the oil pressure transitions smoothly and avoids excessive impact; the high-speed switching valve adopts a zero-coverage design, which can minimize the impact of pressure shock during operation and effectively avoid water hammer effect, thereby improving the working stability of the entire hydraulic system.

[0015] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-speed rotary valve according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the valve core described in the above embodiments; Figure 3 This is a schematic diagram of the valve body described in the above embodiments; Explanation of reference numerals in the instruction manual: 1. Valve body; 101. Annular groove; 2. Valve core; 201. Rectangular oil guide groove; 202. Pressure equalizing groove; 203. Triangular transition groove; 3. Left end cover; 4. Right end cover. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0018] It should be noted that in the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] like Figure 1-3 As shown, the present invention provides a high-speed switching valve with a valve core rotation, including a valve body 1 and a valve core 2 disposed inside the valve body 1, wherein the inner circumference of the valve body 1 and the outer circumference of the valve core 2 are in clearance fit. The valve body 1 is equipped with a left end cover 3 and a right end cover 4 at its two ends respectively. The valve core 2 is rotatably connected to the left end cover 3 and the right end cover 4 at its two ends respectively. The valve body 1 is provided with a first oil outlet, a second oil outlet, a first oil return port, a second oil return port, and an oil inlet. The oil inlet is located between the first oil return port and the second oil return port. The first oil return port, the second oil return port, and the oil inlet are arranged at a 90° angle to each other around the valve body 1. The oil inlet is arranged at a 180° angle to the first oil outlet and the second oil outlet around the valve body 1. The valve body 1 is provided with a plurality of annular grooves 101 along its axial direction, which are respectively connected to the first oil return port, the second oil return port, and the oil inlet. The oil inlet is connected to an external high-pressure pump station. The first oil outlet and the second oil outlet are respectively connected to the oil chamber of an external diaphragm head. The first oil return port and the second oil return port are connected to an external oil tank. One side of the valve core 2 is connected to an external motor through a corresponding end cap and is driven to rotate by the external motor. The valve core 2 is provided with multiple rectangular oil guide grooves 201, which are respectively connected to the first oil outlet, the second oil outlet, and multiple annular grooves 101. The multiple rectangular oil guide grooves 201 cooperate with the first oil outlet, the second oil outlet, and the multiple annular grooves 101 to realize high-frequency switching of pressure oil between the oil outlet and the oil return port.

[0020] In the above technical solution, the rotary high-speed switching valve of valve core 2 mainly consists of valve core 2 and valve body 1. A left end cover 3 and a right end cover 4 are respectively installed at both ends of the valve body 1. Bearings are embedded in the left end cover 3 and the right end cover 4. The valve core 2 is rotatably connected to the left end cover 3 and the right end cover 4 through the bearings. One end of the valve core 2 passes through the corresponding end cover and is connected to an external motor through a power interface. The external motor is used to drive the valve core 2 to rotate. The valve core 2, as a rotating component, has multiple rectangular oil guide grooves 201, which are the main body for oil circuit opening and closing. The valve body 1 is provided with an oil inlet P port, a first oil outlet A port, a second oil outlet B port, and a first... The valve body 1 has two return ports, T1 and T2, and each port is connected to an external functional component. The valve body 1 also has three annular grooves 101 communicating with the inlet (P port) and two return ports (T1 and T2 ports). The annular grooves 101, two outlet ports, and rectangular guide groove 201 work together to achieve high-frequency reversal of pressurized oil between the outlet and return ports. This invention significantly reduces the number of annular grooves to be machined on the valve core 2 by creating annular grooves 101 on the valve body 1 that communicate with the inlet and return ports, significantly improving the overall strength of the valve core 2 and enhancing the operational stability of the switching valve. The process of achieving high-frequency reversal of pressurized oil between the outlet and return ports through the interaction of the annular grooves 101, two outlet ports, and rectangular guide groove 201 is as follows: Initial state: Valve core 2 is in Figure 2For ease of description, the two rectangular oil guide grooves located on the upper part of valve core 2 are named, from left to right, the left return groove and the right inlet groove, and the two rectangular oil guide grooves located on the lower part of valve core 2 are named, from left to right, the left inlet groove and the right return groove. The left inlet groove on valve core 2 is connected to the first outlet port A of the valve body. The left inlet groove is also connected to the inlet port P through a corresponding annular groove. The high-pressure hydraulic oil from the external high-pressure pump station is transported to the first outlet port A through the inlet port P, the annular groove, and the left inlet groove, and then transported to the left diaphragm head through port A. The right return groove on valve core 2 is connected to the second outlet port B of the valve body. The right return groove is also connected to the second return port T2 through a corresponding annular groove. The high-pressure hydraulic oil in the diaphragm cavity of the right diaphragm head flows back to the second return port T2 through the second outlet port B, and finally flows to the external oil tank. First reversal: After the external motor drives the valve core 2 to rotate 90° counterclockwise (viewed from the left) around its own axis, the left return oil groove on the valve core 2 is connected to the first oil outlet A port of the valve body. The left return oil groove is also connected to the first return oil port T1 port through the corresponding annular groove. The high-pressure hydraulic oil in the diaphragm cavity of the left diaphragm head flows back to the first return oil port T1 port through the first oil outlet A port and finally flows to the external oil tank. The right inlet oil groove on the valve core 2 is connected to the oil outlet B port of the valve body. The right inlet oil groove is also connected to the inlet P port through the corresponding annular groove. The high-pressure hydraulic oil of the external high-pressure pump station is delivered to the right diaphragm head through the inlet P port. High-frequency continuous reversing: The valve body outlet ports A and B alternately connect with the left inlet groove and the left return groove, and the right inlet groove and the right return groove on the valve core, realizing the alternating entry and exit of high-pressure hydraulic oil in the left and right diaphragm heads, and completing the gas pressurization of the diaphragm cavity.

[0021] The application scenarios of the rotary high-speed switching valve of the present invention are not limited to the above-mentioned diaphragm gas pressurization scenario, but are also applicable to other needs of alternating pressurization, switching or reversing.

[0022] In another technical solution, the valve core 2 is also provided with a plurality of pressure equalization grooves 202, which are spaced apart along the axial direction of the valve core 2. Any pressure equalization groove 202 is opened along the circumference of the valve core 2. The pressure equalization groove 202 is not connected to the first oil outlet, the second oil outlet, the first oil return port, the second oil return port and the oil inlet.

[0023] In this technical solution, the multiple pressure equalization grooves 202 on the valve core 2 are located close to each oil port of the valve body 1, but are not connected to each oil port on the valve body 1, so as to avoid pressure oil leakage. The pressure equalization grooves 202 can effectively balance the circumferential / radial force of the valve core 2, reduce the risk of uneven load on the valve core 2, prevent the slender rod valve core 2 from getting stuck with the valve body due to excessive deflection, and improve the service life of the valve core 2.

[0024] In another technical solution, triangular transition grooves 203 are symmetrically provided on both sides of one end of the rectangular oil guide groove 201, which is connected to the oil inlet by the annular groove 101.

[0025] In this technical solution, triangular transition grooves 203 are symmetrically opened on both sides of one end of the rectangular oil guide groove 201 connected to the oil inlet. This can realize the slow transition of the valve port flow area between the valve core 2 and the oil hole of the valve body 1, effectively reduce the pressure and flow step response, make the oil pressure transition smoothly, avoid excessive impact, and at the same time prevent the flow channels of the two high and low pressure oil outlets from being connected, causing hydraulic oil leakage and reducing the efficiency of the hydraulic system.

[0026] In another technical solution, the first oil outlet, the second oil outlet, the first oil return port, the second oil return port, and the oil inlet are all rectangular openings.

[0027] In this technical solution, all oil ports on the valve body 1 are rectangular openings, which allows the flow area of ​​the valve core 2 to increase linearly during rotation, effectively reducing flow impact and thus avoiding excessive pipeline vibration.

[0028] In another technical solution, the circumferential angle of the valve body 1 corresponding to the first oil outlet and the second oil outlet is coaxially aligned with the circumferential groove angle of the valve core 2 corresponding to the rectangular oil guide groove 201 on the valve core 2. When the valve core 2 is in the initial middle position, the throttling edge of the rectangular oil guide groove 201 has no circumferential interval angle and no radial overlap with the rectangular opening edge of the first oil outlet and the second oil outlet, so as to form a zero-coverage fit.

[0029] In this technical solution, the high-speed switching valve adopts a zero-coverage design, which can minimize the impact of pressure shock during operation and effectively avoid water hammer effect, thereby improving the working stability of the entire hydraulic system.

[0030] In another technical solution, the width and depth of the rectangular oil guide groove 201 are both 0.5mm.

[0031] In another technical solution, a sealing ring is embedded at the connection between the valve core 2 and the left end cover 3 and the right end cover 4.

[0032] The present invention proposes a rotary high-speed switching valve, which can fundamentally improve the design defect of uneven force on the valve core 2, significantly improve the overall working stability of the rotary valve, and thus further adapt to high-frequency operation, strongly promote the development of large-displacement hydraulic diaphragm hydrogen compressors, and has broad application prospects.

[0033] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high-speed rotary valve, characterized in that, Includes a valve body and a valve core disposed inside the valve body; The valve body is equipped with a left end cover and a right end cover at both ends, and the valve core is rotatably connected to the left end cover and the right end cover at both ends. The valve body is provided with a first oil outlet, a second oil outlet, a first oil return port, a second oil return port, and an oil inlet. The oil inlet is located between the first oil return port and the second oil return port. The valve body is provided with a plurality of annular grooves along its axial direction, which are respectively connected to the first oil return port, the second oil return port, and the oil inlet. The oil inlet is connected to an external high-pressure pump station. The first oil outlet and the second oil outlet are respectively connected to the oil chamber of an external diaphragm head. The first oil return port and the second oil return port are connected to an external oil tank. One side of the valve core passes through the corresponding end cap and is connected to an external motor, which drives the rotation. The valve core is provided with multiple rectangular oil guide grooves, which are respectively connected to the first oil outlet, the second oil outlet, and multiple annular grooves. The multiple rectangular oil guide grooves cooperate with the first oil outlet, the second oil outlet, and multiple annular grooves to realize high-frequency switching of pressure oil between the oil outlet and the return oil outlet.

2. The high-speed rotary valve as described in claim 1, characterized in that, The valve core is also provided with a plurality of pressure equalization grooves, which are spaced apart along the axial direction of the valve core. Any pressure equalization groove is provided along the circumference of the valve core. The pressure equalization groove is not connected to the first oil outlet, the second oil outlet, the first oil return port, the second oil return port and the oil inlet.

3. The high-speed rotary valve as described in claim 1, characterized in that, A rectangular oil guide groove, which is connected to the oil inlet via an annular groove, has triangular transition grooves symmetrically formed on both sides of one end.

4. The high-speed rotary valve as described in claim 1, characterized in that, The first oil outlet, the second oil outlet, the first oil return outlet, the second oil return outlet, and the oil inlet are all rectangular openings.

5. The high-speed rotary valve as described in claim 4, characterized in that, The circumferential angles of the valve body corresponding to the first and second oil outlets are coaxially aligned with the circumferential groove angles of the corresponding rectangular oil guide grooves on the valve core. When the valve core is in the initial neutral position, the throttling edge of the rectangular oil guide groove has no circumferential interval angle and no radial overlap with the rectangular opening edges of the first and second oil outlets, thus forming a zero-coverage fit.

6. The high-speed rotary valve as described in claim 1, characterized in that, The first oil return port, the second oil return port, and the oil inlet are arranged at 90° to each other in the circumferential direction of the valve body, and the oil inlet is arranged at 180° to the first oil outlet and the second oil outlet in the circumferential direction of the valve body.

7. The high-speed rotary valve as described in claim 1, characterized in that, The width and depth of the rectangular oil guide groove are both 0.5 mm.

8. The high-speed rotary valve as described in claim 1, characterized in that, The inner circumference of the valve body is clearance-fitted with the outer circumference of the valve core.

9. The high-speed rotary valve as described in claim 1, characterized in that, A sealing ring is embedded at the connection between the valve core and the left and right end caps.

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