Leak-proof servo valve
By setting up an oil unloading channel in the servo valve, the problem of oil leakage is solved, oil pressure balance is achieved, the stability and life of the servo valve are improved, maintenance is simplified, and environmental pollution is reduced.
Patent Information
- Application Number
- CN202423224259.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Traditional servo valves suffer from oil leakage under high pressure and high frequency operating conditions, which affects system performance and reliability, while also increasing environmental pollution and maintenance difficulty.
A leak-proof servo valve is designed. By setting an oil unloading channel in the valve core movement gap, the leaked oil is guided into the return port to achieve oil pressure balance and reduce leakage.
It effectively reduces oil leakage, improves the working stability and service life of servo valves, reduces environmental pollution, and simplifies the maintenance process.
Smart Images
Figure CN223690063U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hydraulic servo valve technical field, especially relates to a kind of anti-leakage servo valves. BACKGROUND
[0002] As a key component in modern automatic control systems, servo valves are widely used in aerospace, industrial automation and hydraulic transmission fields. Its main function is to accurately control the flow and pressure of fluid, so as to realize efficient regulation and control of mechanical equipment. However, the traditional servo valve often faces the problem of oil leakage during operation, especially under high pressure and high frequency operating conditions, which can significantly affect the performance and reliability of the system.
[0003] Oil leakage not only leads to energy loss, but also pollutes the environment and affects the stability and service life of the equipment. In order to solve this problem, engineers have proposed various design improvements, including valve core material selection, sealing structure optimization and flow path layout improvement. However, the existing servo valve still has defects such as complex design, high manufacturing cost and difficult maintenance.
[0004] Against this background, it is particularly important to design an anti-leakage servo valve. SUMMARY
[0005] The main purpose of the utility model is to propose an anti-leakage servo valve, which aims to realize high-precision control while solving the problem of oil leakage in servo valves.
[0006] To achieve the above purpose, the anti-leakage servo valve proposed by the utility model comprises a valve core and a valve body shell surrounding the valve core, the valve body shell is internally provided with a receiving cavity for accommodating the valve core, the mounting surface of the valve body shell is provided with an oil inlet and an oil return port, and the internal flow path system is provided with a communication passage between the oil inlet, the oil return port and the receiving cavity.
[0007] The receiving cavity is provided with an oil discharge inlet, the inner wall of the oil return port is provided with an oil discharge outlet, and a communication oil discharge channel is provided between the oil discharge inlet and the oil discharge outlet, which is independently provided with the flow path system.
[0008] In an embodiment, the valve core divides the receiving cavity into at least two sealed chambers, the oil discharge inlet is provided in the sealed chamber, and the oil in the sealed chamber is discharged through the oil discharge channel.
[0009] In an embodiment, each sealed chamber is provided with at least one oil discharge channel connected to the oil return port, and all oil discharge channels are connected or independently provided.
[0010] In an embodiment, the number of oil discharge channels is 1-20.
[0011] In an embodiment, the oil discharge outlet is arranged on one side of the inner wall close to the end face of the oil return port.
[0012] In an embodiment, the diameters of the oil discharge channels can be the same or different, and the diameters range from 0.5 mm to 20 mm.
[0013] In an embodiment, a one-way valve is arranged in the oil discharge channel to guide the oil from the oil discharge inlet to the oil discharge outlet.
[0014] In an embodiment, a filter element is arranged in the oil discharge channel, and the filter element is arranged close to the oil discharge inlet and / or close to the oil discharge outlet.
[0015] In an embodiment, the diameters of the oil discharge channels can be the same or different, and the diameters range from 0.5 mm to 20 mm.
[0016] The technical scheme of the utility model discloses an oil discharge channel is arranged in the sealed containing cavity to the inner wall of the oil return port, and the oil pressure in the containing cavity is balanced, and the oil leaking into the containing cavity along with the movement of the valve core gap is guided out and returned to the oil return port, thereby reducing the possibility of the leaking oil accumulated in the containing cavity leaking to the outside along with the component gap under the influence of pressure, reducing the pollution to the environment, and ensuring the working stability and service life of the servo valve. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.
[0018] Figure 1 A perspective sectional view of an embodiment of the anti-leakage servo valve provided by the utility model Figure 1 ;
[0019] Figure 2 A structure schematic view of the installation surface of another embodiment of the anti-leakage servo valve provided by the utility model
[0020] Figure 3 A structure schematic view of the flow channel system of another embodiment of the anti-leakage servo valve provided by the utility model
[0021] Figure 4 A structure schematic view of the flow channel system and the oil discharge channel of still another embodiment of the anti-leakage servo valve provided by the utility model
[0022] Figure 5The utility model provides a three -dimensional section of one embodiment of the anti -leakage servo valve Figure 2 ;
[0023] Figure 6 The structure diagram of one way valve of still another embodiment of the anti -leakage servo valve provided by the utility model.
[0024] Explanation of reference numerals:
[0025] 1, anti -leakage servo valve;
[0026] 11, valve core;12, valve body shell;
[0027] 121, oil inlet;122, oil return port;123, accommodating cavity;124, flow channel system;125, oil discharge inlet;126, oil discharge passage;127, oil discharge outlet;
[0028] 1231, sealing chamber;1261, one way valve;1262, filter element.
[0029] The utility model discloses the realization, functional characteristics and advantages will be further explained with reference to the embodiment. DETAILED DESCRIPTION
[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0031] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications also change accordingly. Unless otherwise specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.
[0032] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element limited by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.
[0033] As a key component in modern automatic control systems, servo valves are widely used in aerospace, industrial automation and hydraulic transmission fields. Its main function is to accurately control the flow and pressure of fluid, so as to realize efficient regulation and control of mechanical equipment. However, the traditional servo valve often faces the problem of oil leakage during operation, especially under high pressure and high frequency operating conditions, the leakage phenomenon will significantly affect the performance and reliability of the system.
[0034] Oil leakage not only leads to energy loss, but also pollutes the environment, and affects the working stability and service life of the equipment. In order to solve this problem, engineers have proposed various design improvement schemes, including the selection of valve core material, the optimization of sealing structure and the improvement of flow channel layout. However, the servo valve in the prior art still has defects such as complex design, high manufacturing cost and difficult maintenance.
[0035] In this background, it is particularly important to design a leakage-proof servo valve.
[0036] Please combine Figures 1-5 , the utility model provides a kind of leakage-proof servo valve 1.
[0037] In the embodiment of the utility model, the anti-leakage servo valve 1 includes a valve core 11 and a valve body shell 12 surrounding the valve core 11, the valve body shell 12 is internally provided with a containing cavity 123 for arranging the valve core 11, the mounting surface of the valve body shell 12 is provided with an oil inlet 121 and an oil return port 122, and the internal flow channel system 124 for connecting the oil inlet 121, the oil return port 122 and the containing cavity 123 is arranged.
[0038] The containing cavity 123 is internally provided with an oil discharge inlet 125, the inner wall of the oil return port 122 is provided with an oil discharge outlet 127, and the oil discharge channel 126 for communication between the oil discharge inlet 125 and the oil discharge outlet 127 is independently arranged with the flow channel system 124.
[0039] It should be noted that the installation of the valve core 11 in the containing cavity 123 will divide the original containing cavity 123 into multiple independent sealed chambers 1231, and the influence of environmental factors such as temperature change, vibration and pressure change on the servo valve during operation will change the pressure in the sealed chambers 1231, and the connection relationship between the valve core 11 and the valve body is not always fixed.
[0040] Therefore, the oil entering the containing cavity 123 through the oil inlet 121 will seep into each sealed chamber 1231 under the condition that the position of the valve core 11 changes, resulting in an increase in the pressure in the sealed chamber 1231, which will affect the valve core 11 and also leak outward with the movement of the valve core 11.
[0041] Understandably, the oil discharge channel 126 is arranged in each sealed chamber 1231, which can guide the entering oil to flow into the oil return port 122 to rejoin the oil circulation, and balance the pressure of each sealed chamber 1231 around the valve core 11, thereby reducing the influence on the valve core 11 and solving the oil leakage problem of the servo valve.
[0042] In the embodiment of the utility model, at least one oil discharge channel 126 for communicating with the oil return port 122 is arranged in each sealed chamber 1231, and all the oil discharge channels 126 can be communicated or independently arranged.
[0043] It should be noted that the sealed chamber 1231 of the utility model is a chamber without direct communication with the flow channel system 124, and the oil enters each type of chamber through the gap generated by the movement of the valve core 11.
[0044] Due to the influence of the structure of the valve core 11, the sizes of the sealed chambers 1231 are different, and the positions of the divided chambers are different, so the structures of the oil discharge channels 126 for conducting the oil in different sealed chambers 1231 also need to be designed correspondingly.
[0045] It can be understood that, due to the limited volume of the valve body shell 12, while opening a plurality of oil discharge channels 126, the availability of space in the overall structure needs to be considered, therefore the structure of each oil discharge channel 126 is not limited, and the actual product is used as the standard.
[0046] Specifically, the length of the oil discharge channel 126 should be as short as possible, the more complex the oil discharge channel 126, the more space it will occupy, which will correspondingly affect the total number of the oil discharge channel 126, and if the number cannot be reduced, the volume of the valve body shell 12 may be increased, thereby making the overall structure bulky and the internal structure complex.
[0047] In the embodiment of the present application, the number of oil discharge channels 126 is 1-20.
[0048] Specifically, in the embodiment of the present application, the number of oil discharge channels 126 is 4, which corresponds to four independent sealed chambers 1231 formed by the valve core 11.
[0049] In the embodiment of the present application, the oil discharge outlet 127 is arranged on one side of the inner wall close to the end face of the oil return port 122.
[0050] It should be noted that the oil enters the oil inlet 121 and acts on the valve core 11 through the flow channel system 124, and then is discharged through the oil return port 122 to form a cycle, and the oil pressure is reduced when the oil flows out of the oil return port 122, and the oil pressure in the oil discharge outlet 127 and the oil discharge channel 126 drives the oil in the sealed chamber 1231 to flow out.
[0051] In the embodiment of the present application, the diameter of the oil discharge channel 126 can be the same or different, and the diameter range is 0.5mm-20mm.
[0052] It should be noted that the diameter of each oil discharge channel 126 can be the same or different, and the shape of each oil discharge channel 126 can be the same or different, and the actual production standard is used as the standard.
[0053] However, different oil discharge channels 126 can be connected to each other, or can be independent of each other.
[0054] In addition, the valve body shell 12 has different sizes according to different use scenarios and different use requirements of the servo valve, and the diameter of the oil discharge channel 126 is adjusted according to the different sizes of the valve body shell 12 to ensure normal use and relatively reasonable space occupation.
[0055] Specifically, please refer to Figures 4-6 In the embodiment of the present application, the oil discharge channel 126 is provided with a one-way valve 1261 for guiding the oil from the oil discharge inlet 125 to the oil discharge outlet 127.
[0056] When the partial oil discharge channels 126 are connected, the one-way valve 1261 is arranged between the connection and the oil discharge outlet 127, so that one one-way valve 1261 can prevent the oil in the multiple oil discharge channels 126 from flowing back;
[0057] Or, when the partial oil discharge channels 126 are connected, the one-way valve 1261 is arranged between the oil discharge inlet 125 in each oil discharge channel 126 and the connection, achieving the anti-backflow of the oil in each oil discharge channel 126;
[0058] Or, in another embodiment, when the partial oil discharge channels 126 are connected, the one-way valve 1261 is arranged between the connection and the oil discharge outlet 127, and between the oil discharge inlet 125 in each oil discharge channel 126 and the connection, achieving a multi-stage anti-backflow arrangement.
[0059] Please continue to combine Figures 1-5 In the embodiment of the utility model, the oil discharge channel 126 is provided with a filter element 1262, which is arranged at one end close to the oil discharge inlet 125 and / or one end close to the oil discharge outlet 127 in the oil discharge channel 126.
[0060] It should be noted that the oil may mix with impurities during use, or the original oil may have a large number of impurity particles with large particle size, which may block or even damage the servo valve during use, and the oil discharge channel 126 has a relatively small diameter, so the possibility of being blocked by impurities is higher, therefore, not only the filter element 1262 is arranged in the flow channel system 124 of the servo valve to filter impurities, but also the filter element 1262 is arranged in the oil discharge channel 126 or the port of the oil discharge channel 126 to filter impurities again.
[0061] The filter element 1262 in the oil discharge channel 126 is arranged at the port to facilitate observation of the impurity filtration condition, so that maintenance and cleaning of the servo valve can be completed as soon as possible when the filter element 1262 filters too much impurities, preventing the servo valve from being completely blocked.
[0062] As an implementable manner, since the diameter of the oil discharge channel 126 is too small and the number of the oil discharge channels 126 arranged may be relatively large, the forming process of the conventional servo valve body is difficult to meet the requirements, therefore, the 3D printing processing method is usually used to complete the forming process, ensuring that the precision of the product structure is higher.
[0063] The technical scheme of the utility model discloses a technology scheme that through setting up the oil discharging channel 126 in the sealed containing cavity 123 to the inner wall of the oil return port 122, balances the oil pressure in the containing cavity 123, and at the same time, the oil liquid leaked to the containing cavity 123 along with the movement gap of the valve core 11 is guided out and returned to the oil return port 122, thereby reducing the influence of pressure, the possibility of the leakage oil accumulated in the containing cavity 123 leaking to the outside along with the component gap, reducing the pollution to the environment, and guaranteeing the working stability and service life of the servo valve.
[0064] It should be understood that the "one embodiment" or "one example" mentioned throughout the specification means that the specific features, structures or characteristics related to the example are included in at least one embodiment of the utility model. Therefore, "in one embodiment" or "in one example" appearing throughout the specification does not necessarily refer to the same example. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also know that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily required by the utility model.
[0065] In various embodiments of the utility model, it should be understood that the size of the serial number of the above processes does not mean the inevitable sequence of execution, and the execution sequence of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the utility model.
[0066] In the flowchart and block diagram in the drawings of the utility model, the possible implementation architecture, function and operation of the system, method and computer program product according to various embodiments of the application are illustrated. In this regard, each block in the flowchart or block diagram can represent a module, program segment or part of code containing one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the block can also occur in a different order from that marked in the drawing. For example, two blocks represented in succession can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, which is determined based on the functions involved. It should be particularly noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be realized by a special hardware-based system that executes the specified function or operation, or can be realized by a combination of special hardware and computer instructions.
[0067] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the technical concept of the present application and by using the content of the present application specification and drawings are included in the patent protection scope of the present application.
Claims
1. A leak-proof servo valve characterized by: The leakage-proof servo valve comprises a valve core and a valve body shell surrounding the valve core, the valve body shell is internally provided with a containing cavity for arranging the valve core, the installation surface of the valve body shell is provided with an oil inlet and an oil return port, and the valve body shell is internally provided with a flow channel system communicating the oil inlet, the oil return port and the containing cavity; The containing cavity is internally provided with an oil discharge inlet, the inner wall of the oil return port is provided with an oil discharge outlet, and the oil discharge inlet and the oil discharge outlet are provided with a communicating oil discharge channel, which is independently arranged with the flow channel system.
2. The leak-proof servo valve of claim 1, wherein: The valve core divides the containing cavity into at least two sealed cavities, the oil discharge inlet is arranged in the sealed cavity, and the oil in the sealed cavity is discharged through the oil discharge channel.
3. The leak-proof servo valve of claim 2, wherein: Each sealed cavity is provided with at least one oil discharge channel communicating with the oil return port, and all the oil discharge channels are independently arranged or communicated with each other.
4. The leak-proof servo valve of claim 3, wherein: The number of the oil discharge channels is 1-20.
5. The leak-proof servo valve of claim 1, wherein: The oil discharge outlet is arranged on one side of the inner wall close to the end surface of the oil return port.
6. The leak-proof servo valve of claim 1, wherein: The diameters of the oil discharge channels can be the same or different, and the diameter range is 0.5 mm-20 mm.
7. The leak-proof servo valve of claim 1, wherein: A one-way valve is arranged in the oil discharge channel to enable the oil to flow from the oil discharge inlet to the oil discharge outlet.
8. The leak-proof servo valve of claim 1, wherein: A filter core is arranged in the oil discharge channel, and the filter core is arranged at one end close to the oil discharge inlet and / or one end close to the oil discharge outlet.
9. The leak-proof servo valve of claim 3, wherein: The diameters of each oil discharge channel can be the same or different, and the shapes of each oil discharge channel can be the same or different.