A helically twisted self-sealing rotary valve and method

Abstract

The present application provides a kind of helical twist self-sealing rotary valve and method, including conical valve core, shell and driving component.The multiple helical twist through holes are opened along circumference on conical valve core, and the hole channel center line forms a certain angle with valve core axis.The shell is equipped with the inner taper hole matched with the conical surface of valve core and fluid inlet and outlet.When fluid flows through helical twist through hole, additional axial force that conical surface of valve core is pressed tightly inner taper hole of shell is generated, realizes dynamic self-sealing, simultaneously generates tangential component force that assists valve core rotation, effectively reduces opening and closing torque.The present application is simple and compact in structure, good in sealing performance, easy to operate, especially suitable for medium and high pressure hydraulic, gas pressure transmission system, solves the problem of poor sealing of traditional rotary valve, limited application range.

Description

Technical Field

[0001] This invention relates to the field of fluid transmission and control technology, and in particular to a spiral twisting self-sealing rotary valve and method. Background Technology

[0002] Rotary directional valves are widely used in fluid transmission systems due to their simple structure and ease of operation. However, traditional rotary valves suffer from poor sealing performance due to structural design limitations, and are typically only suitable for low-pressure pneumatic transmission systems, making it difficult to operate stably in medium- and high-pressure fluid transmission systems. Furthermore, traditional rotary valves still require improvement in terms of starting torque, sealing reliability, and service life.

[0003] Therefore, there is an urgent need for a rotary valve that is simple in structure, has good sealing performance, low control torque, and is suitable for medium and high pressure fluid transmission systems. Summary of the Invention

[0004] The purpose of this invention is to provide a spiral twisted self-sealing rotary valve and method, which aims to solve the problems of poor sealing performance and limited application range of existing rotary valves. By designing a spiral twisted through-hole with a specific tilt angle, the fluid flows through it and simultaneously generates an axial force for sealing and a tangential force to assist rotation. This achieves efficient self-sealing of the rotary valve while significantly reducing its operating torque, thus expanding the application range of the rotary valve in medium and high pressure fluid transmission systems.

[0005] According to one object of the present invention, the present invention provides a helical twist self-sealing rotary valve, comprising: The valve core is conical, with a conical outer surface. The housing has an internal conical hole that mates with the conical surface of the conical valve core; A drive component, connected to the conical valve core, is used to drive its rotation; At least two spiral twisted through holes are uniformly opened along the circumference of the conical valve core. The center line of the spiral twisted through hole forms a set angle with the axis of the conical valve core, so that when the fluid flows through it, it generates an axial additional force pointing towards the large diameter end of the inner conical hole and a tangential component force driving its rotation.

[0006] Furthermore, the number of spiral twisted through holes is 4, 6, or 8.

[0007] Furthermore, the angle between the center line of the spiral twisted through hole and the axis of the conical valve core is 10° to 30°.

[0008] Furthermore, the two ends of the conical valve core are respectively provided with an upper bearing support step and a lower bearing support step; the two ends of the inner conical hole of the housing are respectively provided with the upper bearing support step hole and the lower bearing support step hole.

[0009] Furthermore, the housing is provided with a fluid inlet hole and a fluid outlet hole corresponding to the spiral twisted through hole.

[0010] Furthermore, the centerlines of the fluid inlet hole and the fluid outlet hole are located in the same plane, and the plane is perpendicular to the axis of the conical valve core.

[0011] Furthermore, the housing is also provided with a lubrication and sealing oil mold inlet hole, which leads to the surface of the inner conical hole.

[0012] Furthermore, the drive component engages with a cross-shaped connector on the top of the conical valve core via a cross-shaped connector.

[0013] A fluid reversing control method based on the above-mentioned helical twisted self-sealing rotary valve includes the following steps: The driving component drives the conical valve core to rotate to the first working position, so that the fluid inlet hole of the housing is connected to one end of at least one spiral twisted through hole of the conical valve core, and at the same time, the fluid outlet hole of the housing is connected to the other end of the spiral twisted through hole, forming a fluid passage. When it is necessary to switch the fluid flow direction or cut off the fluid, the driving component drives the conical valve core to rotate to the second working position, so that the spiral twisted through hole is misaligned with the fluid inlet hole and the fluid outlet hole, thus cutting off the fluid passage. In either the first or second working position, the fluid flowing through the spiral twisted through-hole exerts an additional axial force on the conical valve core, causing its conical surface to press against the conical hole inside the housing.

[0014] A method for achieving self-sealing of a rotary valve using a spirally twisted through-hole, applied between a valve core and a valve seat with a tapered mating surface, includes: At least two helical twisted through holes are formed on the valve core, and the center line of the channel of the helical twisted through hole is inclined relative to the rotation axis of the valve core; When fluid flows through the spiral twisted through-hole, the dynamic pressure effect of the fluid generates an axial force that presses the conical surface of the valve core against the valve seat, thereby achieving dynamic self-sealing.

[0015] This invention utilizes a unique spiral-twisted through-hole design, which automatically generates an additional axial force that presses the conical valve core against the conical hole inside the valve housing as fluid flows through. This achieves excellent dynamic self-sealing and significantly improves the valve's sealing reliability under medium and high pressure conditions. Simultaneously, this fluid dynamic is converted into auxiliary rotational torque, greatly reducing the external operating torque required for valve opening and closing, making control easier and more flexible. Its simple and compact structure, with fewer parts, results in low manufacturing costs, ease of assembly and maintenance, high reliability, and long service life. This valve successfully expands the application range of rotary valves in demanding fluid transmission systems such as high-pressure hydraulic and pneumatic systems, demonstrating significant engineering practical value. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the conical valve core according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the shell structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the lower end cap according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the upper end cap according to an embodiment of the present invention; Figure 6 This is an assembly cross-sectional view of an embodiment of the present invention.

[0018] In the diagram: 1. Conical valve core; 11. Upper bearing support step of the valve core; 12. Lower bearing support step of the valve core; 101. Conical body; 102. Spiral twisted through hole; 103. Cross connection hole; 2. Housing; 201. Inner tapered hole; 202. Fluid inlet hole; 203. Fluid inlet hole; 204. Lubrication and sealing oil mold inlet hole; 205. Housing connection threaded hole; 206. Stepped hole; 3. Drive components; 31. Bearing support cylindrical section; 32. Cross-shaped connector; 4. Top end cap; 401. Middle hole; 402. Top end cap connecting threaded hole; 5. Lower end cap; 501. Sealing ring mounting groove; 502. Upper end cap connecting threaded hole. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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 limiting this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example 1 like Figures 1-6 As shown, a spiral twisted self-sealing rotary valve includes: The conical valve core 1 includes a conical body 101, the outer surface of which is a conical surface, and a plurality of spiral twisted through holes 102 are evenly arranged along the circumference of the conical body 101. The housing 2 has an inner conical hole 201 that mates with the conical surface of the conical valve core 1; the conical angle between the conical valve core 1 and the housing 2 is 5° to 15°. The housing 2 has a cuboid or cylindrical structure.

[0023] The upper end cover 4 and the lower end cover 5 are respectively installed on the upper and lower ends of the housing 2; Drive component 3 is used to drive the conical valve core 1 to rotate; The cross-section of the spiral twisted through-hole 102 is inclined at a certain angle to the end face of the housing 2, so that when the fluid passes through, an additional axial force is generated, which enhances the sealing between the valve core and the housing, and at the same time generates a circumferential rotational torque, reducing the starting torque.

[0024] Specifically, the number of spiral twisted through holes 102 is 4, 6, or 8. The inclination angle of the spiral twisted through holes 102 is 10° to 30°.

[0025] The conical valve core 1 is provided with an upper bearing support step 11 and a lower bearing support step 12. The housing 2 is provided with stepped holes 206 corresponding to the upper bearing support step 11 and the lower bearing support step 12 of the valve core.

[0026] The side of the housing 2 is provided with a fluid inlet hole 202 and a fluid outlet hole 203. The fluid inlet hole 202 and the fluid outlet hole 203 are correspondingly arranged with the spiral twisted through hole 102.

[0027] The side of the housing 2 is also provided with a lubrication and sealing oil mold inlet hole 204.

[0028] The drive component 3 is connected to the cross-shaped connection hole 103 on the top of the valve core via the cross-shaped connector 32.

[0029] The upper end cover 4 and the lower end cover 5 are fixed to the housing 2 by means of threaded connection or flange connection.

[0030] This embodiment uses a conical valve core 1 for a spiral twisted self-sealing rotary valve, comprising: The conical body 101 has a conical outer surface; Multiple spiral twisted through holes 102 are evenly arranged along the circumference on the conical body 101; The upper bearing support step 11 and the lower bearing support step 12 of the valve core are located at the upper and lower ends of the conical body 101, respectively. The cross-shaped connecting hole 103 at the top is used to connect the drive component 3.

[0031] The housing 2 of this embodiment for a spiral twisted self-sealing rotary valve includes: The inner conical bore 201 is used to accommodate the conical valve core 1; Fluid inlet hole 202 and fluid outlet hole 203 are provided on the side of housing 2; The lubrication and sealing oil mold inlet hole 204 is located on the side of the housing 2; The upper end cover 4 and the lower end cover 5 are connected by a structure located on the upper and lower end faces of the housing 2.

[0032] The rotary valve in this embodiment is suitable for hydraulic systems, pneumatic systems, wind-driven transmission systems, or pneumatic conveying systems.

[0033] Example 2 like Figures 1-6 As shown, this embodiment provides a spiral twisted self-sealing rotary valve, including a conical valve core 1, a housing 2, a drive component 3, an upper end cover 4, and a lower end cover 5, wherein: The conical valve core 1 has a stepped conical structure, including a conical body 101, on which four spiral twisted through holes 102 are evenly opened. The inclined cross-section of the spiral twisted through holes 102 forms a 15° inclination angle with the end face of the housing.

[0034] The tapered body 101 of the tapered valve core 1 is provided with an upper bearing support step 11 and a lower bearing support step 12 at its upper and lower ends, respectively. The top of the upper bearing support step 11 is provided with a cross-shaped connecting hole 103 for connecting the drive component 3.

[0035] The housing 2 has a cuboid structure and an internal conical hole 201. The cone angle of the internal conical hole 201 is the same as the cone surface of the conical body 101 of the conical valve core 1. The housing 2 has stepped holes 206 corresponding to the upper bearing support step 11 and the lower bearing support step 12 of the valve core.

[0036] The side of the housing 2 is provided with a fluid inlet hole 202 and a fluid outlet hole 203, as well as a lubrication and sealing oil mold inlet hole 204. The upper and lower end faces of the housing 2 are provided with housing connection threaded holes 205 for installing the upper end cover 4 and the lower end cover 5.

[0037] The upper end cover 4 is provided with a central hole 401 and an upper end cover connecting threaded hole 402; the lower end cover 5 is provided with a sealing ring mounting groove 501 and a connecting threaded hole 502.

[0038] The drive component 3 includes a bearing-supported cylindrical section 31 and a cross connector 32, which is connected to the cross connector hole 103 on the conical valve core 1 through the cross connector 32 for driving the valve core to rotate.

[0039] When the valve core is in Figure 6 At the indicated position, fluid enters the spiral twisted through-hole 102 from the inlet hole 202 and flows out from the fluid outlet hole 203. After the valve core rotates 90°, the fluid inlet hole 202 and the fluid outlet hole 203 are closed, achieving a reversal.

[0040] In the above embodiments, the number of spiral twisted through holes can also be 6, and the tilt angle can be set to 20°. The cone angle of the conical valve core 1 and the housing 2 can also be set to 10°. In addition, the housing adopts a cylindrical structure, and the upper end cover and the lower end cover are connected by a flange.

[0041] This structure is suitable for high-pressure hydraulic systems, offering better sealing performance and lower starting torque.

[0042] Example 3 A fluid reversing control method for a helical twist self-sealing rotary valve based on the above embodiments includes the following steps: The driving component drives the conical valve core to rotate to the first working position, so that the fluid inlet hole of the housing is connected to one end of at least one spiral twisted through hole of the conical valve core, and at the same time, the fluid outlet hole of the housing is connected to the other end of the spiral twisted through hole, forming a fluid passage. When it is necessary to switch the fluid flow direction or cut off the fluid, the driving component drives the conical valve core to rotate to the second working position, so that the spiral twisted through hole is misaligned with the fluid inlet hole and the fluid outlet hole, thus cutting off the fluid passage. In either the first or second working position, the fluid flowing through the spiral twisted through-hole exerts an additional axial force on the conical valve core, causing its conical surface to press against the conical hole inside the housing.

[0043] Example 4 A method for achieving self-sealing of a rotary valve using a spiral twisted through-hole as described in the above embodiments, applied between a valve core and a valve seat having a tapered mating surface, the method comprising: At least two helical twisted through holes are formed on the valve core, and the center line of the channel of the helical twisted through hole is inclined relative to the rotation axis of the valve core; When fluid flows through the spiral twisted through-hole, the dynamic pressure effect of the fluid generates an axial force that presses the conical surface of the valve core against the valve seat, thereby achieving dynamic self-sealing.

[0044] In summary, this invention has a simple structure, low manufacturing cost, and is easy to assemble and maintain; it has good sealing performance and is suitable for medium and high pressure fluid transmission systems; it has low control torque and is easy to operate; the spiral twisted through-hole design can achieve self-sealing and auxiliary rotation, improving the valve's response speed and service life; it can be widely used in various fluid transmission applications such as hydraulic, pneumatic, and wind power.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spiral twisted self-sealing rotary valve, characterized in that, include: The valve core is conical, with a conical outer surface. The housing has an internal conical hole that mates with the conical surface of the conical valve core; A drive component, connected to the conical valve core, is used to drive its rotation; At least two spiral twisted through holes are uniformly opened along the circumference of the conical valve core. The center line of the spiral twisted through hole forms a set angle with the axis of the conical valve core, so that when the fluid flows through it, it generates an axial additional force pointing towards the large diameter end of the inner conical hole and a tangential component force driving its rotation.

2. The spiral twisted self-sealing rotary valve according to claim 1, characterized in that, The number of spiral twisted through holes is 4, 6, or 8.

3. The spiral twisted self-sealing rotary valve according to claim 1, characterized in that, The angle between the center line of the spiral twisted through hole and the axis of the tapered valve core is 10° to 30°.

4. The spiral twisted self-sealing rotary valve according to claim 1, characterized in that, The conical valve core has an upper bearing support step and a lower bearing support step at both ends, respectively; the inner conical hole of the housing has corresponding upper bearing support step holes and lower bearing support step holes at both ends.

5. The spiral twisted self-sealing rotary valve according to claim 1, characterized in that, The housing is provided with a fluid inlet hole and a fluid outlet hole corresponding to the spiral twisted through hole.

6. The spiral twisted self-sealing rotary valve according to claim 5, characterized in that, The centerlines of the fluid inlet and the fluid outlet are located in the same plane, and the plane is perpendicular to the axis of the conical valve core.

7. The spiral twisted self-sealing rotary valve according to claim 1, characterized in that, The housing is also provided with a lubrication and sealing oil mold inlet hole, which leads to the surface of the inner conical hole.

8. The spiral twisted self-sealing rotary valve according to claim 1, characterized in that, The drive component mates with a cross-shaped connector that is formed in a cross-shaped connection hole on the top of the conical valve core.

9. A fluid reversing control method based on the spiral twisted self-sealing rotary valve according to any one of claims 1 to 8, characterized in that, Includes the following steps: The driving component drives the conical valve core to rotate to the first working position, so that the fluid inlet hole of the housing is connected to one end of at least one spiral twisted through hole of the conical valve core, and at the same time, the fluid outlet hole of the housing is connected to the other end of the spiral twisted through hole, forming a fluid passage. When it is necessary to switch the fluid flow direction or cut off the fluid, the driving component drives the conical valve core to rotate to the second working position, so that the spiral twisted through hole is misaligned with the fluid inlet hole and the fluid outlet hole, thus cutting off the fluid passage. In either the first or second working position, the fluid flowing through the spiral twisted through-hole exerts an additional axial force on the conical valve core, causing its conical surface to press against the conical hole inside the housing.

10. A method for achieving self-sealing of a rotary valve using a spirally twisted through-hole, characterized in that, The method, applied between a valve core and a valve seat having a tapered mating surface, includes: At least two helical twisted through holes are formed on the valve core, and the center line of the channel of the helical twisted through hole is inclined relative to the rotation axis of the valve core; When fluid flows through the spiral twisted through-hole, the dynamic pressure effect of the fluid generates an axial component force that presses the conical surface of the valve core against the valve seat, thereby achieving dynamic self-sealing.

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