High-stability intelligent servo valve

Abstract

The invention relates to the technical field of servo valves, and discloses a high-stability intelligent servo valve which comprises a driving unit, a control unit, a control unit and a control unit. The filtering protection unit comprises a connecting pipe head and a magnetic adsorption assembly arranged on the outer side of the connecting pipe head; the magnetic adsorption assembly comprises a valve sleeve. Metal scraps and dust can be efficiently intercepted through a two-stage filtering system composed of the magnetic adsorption assembly and the porous alloy filter screen, pollutant deposition is avoided through the optimal design of a flow channel of the valve sleeve and the L-shaped bent pipe, the particle clamping stagnation risk is reduced through the curved surface matching structure of the spherical valve element, external pollutants are prevented from invading through the multi-stage sealing plug, and the service life of the valve is prolonged. From the three dimensions of pollution source control, process interception and key component protection, the clamping stagnation probability of the valve element is remarkably reduced, the servo valve keeps the movement precision and the dynamic response stability in long-term operation, and the problems of zero drift, response hysteresis and the like caused by pollution are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of servo valves, and in particular to a high-stability intelligent servo valve. Background Art

[0002] A servo valve is a precision fluid control device that uses electrical signals to regulate flow and pressure in hydraulic or pneumatic systems, enabling high-precision motion control of actuators. Its core function is to drive the valve core through electromagnetic force, rapidly responding to input commands and maintaining stable output. It is widely used in aerospace, industrial automation, robotics, and other fields. Its fast dynamic response and high control accuracy make it a key component in modern mechatronic systems.

[0003] The problem of servo valve being sensitive to oil contamination is mainly manifested in that when pollutant particles (such as metal debris, dust, etc.) enter the gap between the valve core and the valve sleeve, the movement of the valve core will be obstructed or stuck, thereby causing unstable phenomena such as zero position drift, response delay or sudden stroke jump; this phenomenon is particularly prominent when the hydraulic system is operated for a long time or maintenance is not timely, resulting in poor stability during operation and directly affecting the control accuracy and valve life. Summary of the Invention

[0004] In view of the above problems existing in the existing servo valve, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a highly stable intelligent servo valve.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0007] A drive unit comprising a torque motor and a flow control assembly disposed outside the torque motor;

[0008] The filtering protection unit includes a connecting pipe head and a magnetic adsorption component arranged on the outside of the connecting pipe head;

[0009] The magnetic adsorption assembly includes a valve sleeve, a sealing connection plug movably mounted in the inner cavity of the valve sleeve, a filter collecting member arranged in the inner cavity of the valve sleeve, and a scale knob hinged on the outer side of the valve sleeve.

[0010] As a preferred solution of the high-stability intelligent servo valve described in the present invention, the filtering protection unit also includes an L-shaped elbow fixedly installed at the end of the connecting pipe head, and a multi-stage sealing plug fixedly installed at the bottom end of the connecting pipe head.

[0011] As a preferred solution of the high-stability intelligent servo valve of the present invention, one end of the valve sleeve is connected to the end of the L-shaped elbow, and the other end of the valve sleeve is connected to the end of the connecting pipe head.

[0012] As a preferred solution of the high-stability intelligent servo valve described in the present invention, the filter collecting component includes a shell sleeve fixedly connected to the end of the sealing connection plug, a guide groove opened on the outside of the shell sleeve, a card slot opened on the top of the shell sleeve, and a card sleeve movably arranged in the inner cavity of the card slot.

[0013] As a preferred solution of the high-stability intelligent servo valve described in the present invention, the filter collection component also includes a rectangular neodymium magnet movably mounted in the inner cavity of the ferrule, a collection tank sleeve fixedly mounted at the bottom of the ferrule, a rectangular tank opened at the bottom of the collection tank sleeve, and a porous alloy filter screen fixedly mounted in the inner cavity of the rectangular tank.

[0014] As a preferred solution of the high-stability intelligent servo valve of the present invention, the pore size of the porous alloy filter is 50 μm, so as to preferentially adsorb magnetic pollutants such as iron filings.

[0015] As a preferred solution of the high-stability intelligent servo valve described in the present invention, the flow control component includes a valve body fixedly mounted on the outside of the torque motor, and a valve stem hinged in the inner cavity of the valve body, and one end of the connecting pipe head is connected to the top of the valve body.

[0016] As a preferred solution of the high-stability intelligent servo valve of the present invention, the flow control component further includes a spherical valve core fixedly connected to the end of the valve stem, and a flow hole opened in the inner cavity of the spherical valve core.

[0017] As a preferred solution of the high-stability intelligent servo valve of the present invention, the drive unit further includes a first valve tube fixedly installed at the bottom of the valve body, and a second valve tube at the top of the valve body.

[0018] As a preferred solution of the high-stability intelligent servo valve described in the present invention, the outer side of the multi-stage sealing plug is provided with a multi-layer stepped sealing ring for sealing the connecting pipe head and the first valve pipe.

[0019] The beneficial effects of the present invention are as follows: the two-stage filtration system composed of a magnetic adsorption component and a porous alloy filter can efficiently intercept metal debris and dust, the optimized flow channel design of the valve sleeve and the L-shaped elbow avoids the deposition of pollutants, the curved surface matching structure of the spherical valve core reduces the risk of particle jamming, and the multi-stage sealing plug prevents the invasion of external pollutants. From the three dimensions of pollution source control, process interception to key component protection, the probability of valve core jamming is significantly reduced, so that the servo valve maintains motion accuracy and dynamic response stability during long-term operation, and effectively solves the problems of zero drift and response delay caused by pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a partial schematic diagram of the magnetic adsorption component and filter collection component structure of the present invention.

[0023] Figure 3 It is a partial cross-sectional view of the magnetic adsorption component structure of the present invention.

[0024] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A.

[0025] Figure 5 It is a partial cross-sectional view of the flow control component structure of the present invention.

[0026] In the picture:

[0027] 100, drive unit; 110, torque motor; 120, flow control assembly; 121, valve body; 122, valve stem; 123, spherical valve core; 124, flow hole; 130, first valve pipe; 140, second valve pipe;

[0028] 200, filter protection unit; 210, connecting pipe head; 220, magnetic adsorption component; 221, valve sleeve; 222, sealing connection plug; 223, filter collection element; 2231, shell sleeve; 2232, guide groove; 2233, card slot; 2234, card sleeve; 2235, rectangular neodymium magnet; 2236, collection tank sleeve; 2237, rectangular slot; 2238, porous alloy filter; 224, scale knob; 230, L-shaped elbow; 240, multi-stage sealing plug. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0032] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0033] Example 1

[0034] Reference Figures 1 to 5 , which is the first embodiment of the present invention, provides a high-stability intelligent servo valve, which includes:

[0035] The drive unit 100 includes a torque motor 110 and a flow control assembly 120 disposed outside the torque motor 110;

[0036] The filter protection unit 200 includes a connecting pipe head 210 and a magnetic adsorption component 220 disposed outside the connecting pipe head 210;

[0037] The magnetic adsorption assembly 220 includes a valve sleeve 221 , a sealing connection plug 222 movably mounted in the inner cavity of the valve sleeve 221 , a filter collection member 223 disposed in the inner cavity of the valve sleeve 221 , and a scale knob 224 hinged to the outer side of the valve sleeve 221 .

[0038] The modular integration of the drive unit 100 and the filter protection unit 200 significantly enhances the overall stability of the servo valve. The torque motor 110, as the core drive component, precisely controls flow regulation, while the flow control assembly 120 optimizes fluid dynamics. The filter protection unit 200 utilizes a coordinated design of a magnetic adsorption assembly 220 and a filter collection element 223 to effectively intercept contaminants and prevent the spherical valve core 123 from becoming stuck. The valve sleeve 221 and sealing connection plug 222 ensure a tight seal, while a graduated knob 224 facilitates parameter fine-tuning during maintenance.

[0039] Specifically, the filtering protection unit 200 also includes an L-shaped elbow 230 fixedly installed at the end of the connecting pipe head 210, and a multi-stage sealing plug 240 fixedly installed at the bottom end of the connecting pipe head 210. One end of the valve sleeve 221 is interconnected with the end of the L-shaped elbow 230, and the other end of the valve sleeve 221 is interconnected with the end of the connecting pipe head 210.

[0040] Among them, by adding an L-shaped elbow 230 and a multi-stage sealing plug 240, the system's sealing and fluid guiding efficiency are further enhanced. The L-shaped elbow 230 optimizes the oil flow direction and reduces turbulent interference. The multi-stage sealing plug 240 completely eliminates the risk of external leakage through multiple sealing barriers. It is suitable for high-pressure or high-frequency working conditions, significantly extends the service life of the servo valve, and reduces the maintenance frequency. The three-way connection design of the valve sleeve 221, the L-shaped elbow 230, and the connecting pipe head 210 realizes the optimal layout of the oil path, which not only ensures that the fluid passes through the filter collection element 223 smoothly, but also reduces the pressure loss through the flow channel geometry optimization. The two-way connection layout avoids dead zone accumulation of dirt, and at the same time provides a uniform flow field environment for the magnetic adsorption component 220, further improving the capture efficiency of pollutants.

[0041] Furthermore, the filter collection element 223 includes a shell sleeve 2231 fixedly connected to the end of the sealing connection plug 222, a guide groove 2232 opened on the outside of the shell sleeve 2231, a card slot 2233 opened on the top of the shell sleeve 2231, and a card sleeve 2234 movably clamped in the inner cavity of the card slot 2233. The filter collection element 223 also includes a rectangular neodymium magnet 2235 movably clamped in the inner cavity of the card sleeve 2234, a collection tank sleeve 2236 fixedly installed at the bottom of the card sleeve 2234, a rectangular tank 2237 opened at the bottom of the collection tank sleeve 2236, and a porous alloy filter screen 2238 fixedly installed in the inner cavity of the rectangular tank 2237.

[0042] The housing 2231 and guide groove 2232 of the filter collection element 223 form a guide channel to ensure that pollutants are directed to the collection area. The quick disassembly and assembly design of the slot 2233 and the sleeve 2234 simplifies the filter element replacement process, ensuring filtration accuracy while significantly reducing maintenance time. This is suitable for industrial scenarios that require frequent maintenance.

[0043] The composite filtration mechanism of the rectangular neodymium magnet 2235 and the porous alloy filter 2238 achieves graded interception of magnetic and non-magnetic particles. The rectangular groove 2237 structure of the collection tank sleeve 2236 extends the oil contact path, improves adsorption efficiency, and can adapt to different pollution types. The magnet module is removable and cleanable, which is extremely economical.

[0044] Preferably, the pore size of the porous alloy filter 2238 is 50 μm to preferentially adsorb magnetic pollutants such as iron filings.

[0045] Among them, the porous alloy filter 2238 with a pore size of 50μm forms a dual physical and magnetic interception of iron chips while ensuring the flow capacity, accurately balancing the contradiction between filtration accuracy and pressure drop, avoiding the flow attenuation caused by the blockage of the porous alloy filter 2238, and effectively protecting the valve core assembly 120 from particle wear.

[0046] Furthermore, the driving unit 100 further includes a first valve tube 130 fixedly mounted on the bottom of the valve body 121 , and a second valve tube 140 on the top of the valve body 121 .

[0047] Among them, the symmetrical layout of the first valve tube 130 and the second valve tube 140 forms a stable hydraulic pressure balance system, which effectively offsets the axial hydraulic force exerted on the valve core 123, significantly improves the dynamic response stability, and reduces energy loss.

[0048] During use, the oil first enters the filter protection unit 200 through the L-shaped elbow 230. When flowing through the valve sleeve 221, the rectangular neodymium magnet 2235 and the porous alloy filter 2238 of the magnetic adsorption component 220 work together to efficiently remove magnetic and non-magnetic pollutants in the oil; the purified oil enters the drive unit 100 through the connecting pipe head 210, and the torque motor 110 drives the spherical valve core 123 of the flow control component 120 according to the control signal, and realizes precise flow control by adjusting the opening of the flow hole 124; the working oil is finally output through the balanced flow channel composed of the first valve pipe 130 and the second valve pipe 140.

[0049] In summary, the performance of the servo valve is comprehensively improved through the modular integration of the drive unit 100 and the filtration protection unit 200. The drive unit 100 uses a torque motor 110 to precisely control the flow control component 120, and cooperates with the symmetrical layout of the first valve tube 130 and the second valve tube 140 to form a pressure balance system; the filtration protection unit is coordinated with the magnetic adsorption component 220 and the multi-stage sealing plug 240 through the collaborative design, and cooperates with the dual filtration mechanism of the 50μm pore size porous alloy filter 2238 and the rectangular neodymium magnet 2235, which not only ensures the sealing reliability of the system but also improves the pollutant interception efficiency. The L-shaped elbow 230 optimizes the fluid path, and the three-way connection design of the valve sleeve 221 reduces the pressure loss. The overall structure not only ensures high dynamic response but also significantly improves the stability and service life of the servo valve under harsh working conditions.

[0050] Example 2

[0051] Reference Figure 1 and Figure 5 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that it provides the effect of achieving high-precision flow regulation and dynamic response optimization through the flow control component 120.

[0052] Furthermore, the flow control assembly 120 includes a valve body 121 fixedly mounted on the outside of the torque motor 110, and a valve stem 122 hinged in the inner cavity of the valve body 121, one end of the connecting pipe head 210 is connected to the top of the valve body 121, and the flow control assembly 120 also includes a spherical valve core 123 fixedly connected to the end of the valve stem 122, and a flow hole 124 opened in the inner cavity of the spherical valve core 123.

[0053] Among them, the articulated linkage design of the valve body 121 and the valve stem 122 converts the rotational motion of the torque motor 110 into precise displacement of the spherical valve core 123. The top connection method of the connecting pipe head 210 and the valve body 121 optimizes the layout of the hydraulic pipeline, reduces the influence of pipeline stress on the control accuracy, and significantly improves the overall transmission efficiency. The cooperation between the spherical valve core 123 and the flow hole 124 realizes nonlinear precise adjustment of the flow rate. The spherical sealing structure can still maintain zero leakage under high pressure. The special configuration of the flow hole 124 can suppress cavitation, which is particularly suitable for large flow regulation occasions.

[0054] During operation, torque motor 110 rotates valve stem 122, causing spherical valve core 123 to precisely swing within valve body 121. By varying the angle of spherical valve core 123, the overlapping area between flow hole 124 and the flow passage of valve body 121 is adjusted, achieving nonlinear and precise flow control. The curved sealing surface of spherical valve core 123 ensures zero leakage under high pressure, while its low friction improves dynamic response speed.

[0055] In summary, the spherical valve core 123 and the flow hole 124 adopt a three-dimensional curved surface to achieve more precise flow regulation characteristics. The articulated valve stem 122 transmission structure effectively eliminates lateral interference during movement, ensuring the stability and accuracy of the valve core 123 movement. The connecting pipe head 210 set on the top optimizes the hydraulic pipeline layout and helps to improve the system pressure characteristics. At the same time, the inner cavity of the valve body 121 adopts a multi-stage flow channel design, which effectively improves the flow state of the fluid and significantly improves the working stability and reliability of the servo valve.

[0056] Example 3

[0057] Reference Figure 1 and Figure 2 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that it provides an optimized structural design of the multi-stage sealing plug 240, which significantly enhances the sealing performance and service life of the servo valve under high-pressure and high-frequency impact conditions.

[0058] Furthermore, a multi-layer stepped sealing ring is provided on the outer side of the multi-stage sealing plug 240 for sealingly connecting the pipe head 210 and the first valve pipe 130 .

[0059] Among them, the stepped sealing ring design of the multi-stage sealing plug 240 achieves absolute sealing under ultra-high pressure conditions through progressive compression of multiple sealing interfaces. Each layer of sealing ring works independently and backs up each other. Even if a single layer fails, the system sealing integrity can still be ensured, and the safety redundancy is extremely high.

[0060] During use, when the system pressure acts on the connecting pipe head 210, the multi-stage sealing plug 240 shares the hydraulic load step by step, effectively dispersing the stress concentration on the sealing interface. Even in the case of severe pressure fluctuations or long-term use causing wear of a single sealing ring, the remaining sealing layers can still maintain a reliable seal, greatly reducing the risk of leakage.

[0061] In summary, the multi-stage sealing plug 240 adopts a multi-layer stepped sealing structure to form a pressure-grading bearing mechanism, ensuring reliable sealing performance under high-pressure conditions. The redundant protection design enables the system to maintain a complete sealing state when any single-layer seal fails. The sealing ring has an adaptive clamping characteristic, which automatically enhances the sealing effect as the working pressure increases. The scientific load distribution design effectively extends the service life of the sealing material, significantly improving the reliability and durability of the servo valve under harsh working conditions, and taking into account both the sealing requirements under extreme working conditions and the stability requirements for long-term use.

[0062] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0063] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high-stability intelligent servo valve, characterized by: include, A drive unit (100) includes a torque motor (110) and a flow control assembly (120) disposed outside the torque motor (110); A filtering protection unit (200) comprises a connecting pipe head (210) and a magnetic adsorption component (220) arranged outside the connecting pipe head (210); The magnetic adsorption assembly (220) comprises a valve sleeve (221), a sealing connection plug (222) movably mounted in the inner cavity of the valve sleeve (221), a filter collection member (223) disposed in the inner cavity of the valve sleeve (221), and a scale knob (224) hinged to the outside of the valve sleeve (221).

2. The high-stability intelligent servo valve according to claim 1, characterized in that: The filtering protection unit (200) further comprises an L-shaped elbow (230) fixedly mounted on the end of the connecting pipe head (210), and a multi-stage sealing plug (240) fixedly mounted on the bottom end of the connecting pipe head (210).

3. The high-stability intelligent servo valve according to claim 2, characterized in that: One end of the valve sleeve (221) is in communication with the end of the L-shaped elbow (230), and the other end of the valve sleeve (221) is in communication with the end of the connecting pipe head (210).

4. The high-stability intelligent servo valve according to claim 3, characterized in that: The filter collecting element (223) comprises a shell (2231) fixedly connected to the end of the sealing connection plug (222), a guide groove (2232) provided on the outside of the shell (2231), a clamping groove (2233) provided on the top of the shell (2231), and a clamping sleeve (2234) movably mounted in the inner cavity of the clamping groove (2233).

5. The high-stability intelligent servo valve according to claim 4, characterized in that: The filter collection element (223) further includes a rectangular neodymium magnet (2235) movably mounted in the inner cavity of the ferrule (2234), a collection slot sleeve (2236) fixedly mounted at the bottom of the ferrule (2234), a rectangular slot (2237) provided at the bottom of the collection slot sleeve (2236), and a porous alloy filter screen (2238) fixedly mounted in the inner cavity of the rectangular slot (2237).

6. The high-stability intelligent servo valve according to claim 5, characterized in that: The pore size of the porous alloy filter (2238) is 50 μm, so as to achieve preferential adsorption of magnetic pollutants such as iron filings.

7. The high-stability intelligent servo valve according to claim 6, characterized in that: The flow control assembly (120) comprises a valve body (121) fixedly mounted on the outside of the torque motor (110), and a valve stem (122) hinged to the inner cavity of the valve body (121); one end of the connecting pipe head (210) is connected to the top of the valve body (121).

8. The high-stability intelligent servo valve according to claim 7, characterized in that: The flow control assembly (120) further comprises a spherical valve core (123) fixedly connected to the end of the valve stem (122), and a flow hole (124) provided in the inner cavity of the spherical valve core (123).

9. The high-stability intelligent servo valve according to claim 8, characterized in that: The driving unit (100) further comprises a first valve tube (130) fixedly mounted on the bottom of the valve body (121), and a second valve tube (140) on the top of the valve body (121).

10. The high-stability intelligent servo valve according to claim 9, characterized in that: The outer side of the multi-stage sealing plug (240) is provided with a multi-layer stepped sealing ring, which is used for sealing the connection between the connecting pipe head (210) and the first valve pipe (130).

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