Anti-overflow structure of servo valve
By setting a cladding ring, annular groove and rubber sealing ring on the valve body of the servo valve to form a double-layer seal, the problem of oil leakage in a high-pressure environment is solved, and the stability of the system is significantly improved.
Patent Information
- Application Number
- CN202422309202.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The servo valve is prone to oil leakage in high-pressure environments, resulting in unstable control system.
A servo valve anti-spill structure is designed, and a double-layer seal is formed by setting a cladding ring, annular groove and rubber sealing ring on the valve body to reduce oil leakage.
It effectively reduces oil leakage and improves the stability of the servo valve system.
Smart Images
Figure CN223035393U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of servo valves, and particularly relates to an anti-leakage structure of a servo valve. Background Art
[0002] A servo valve is a high-precision hydraulic control component used to convert an electrical signal into a hydraulic signal, thereby precisely controlling the position, speed, and force of an actuator in a hydraulic system. An oil port is provided on the valve body of the servo valve and is connected to the oil pipe of the actuator through the oil port, thereby realizing the circulation control of the oil circuit. Since the oil pressure inside the servo valve is high, good sealing measures need to be taken at the connection pipe. Usually, a groove is opened on the oil port, and a sealing ring is arranged in the groove. In this way, when the oil pipe is docked with the oil port, the sealing ring will fill and compact the connection part. However, in a high-pressure environment, oil often leaks from the fitting part between the sealing ring and the oil pipe, resulting in the instability of the control system.
[0003] In view of this, a design or technical improvement is proposed to solve the above problems.
[0004] The above content is only used to assist in understanding the technical solution of the utility model and does not represent an admission that the above content is the closest prior art. Summary of the Utility Model
[0005] The purpose of the utility model is to solve the above deficiencies and provide an anti-leakage structure of a servo valve.
[0006] To solve the above technical problems, the utility model adopts the following technical solutions:
[0007] An anti-leakage structure of a servo valve includes a valve body, an oil port provided on the valve body, and a sink provided at the end of the oil port. A covering ring integrally formed with the valve body is provided on the valve body outside the sink. An annular groove is opened inside the covering ring, and a rubber sealing ring is arranged in the annular groove.
[0008] Further, the inner circle of the rubber sealing ring is arc-shaped and protrudes from the side wall of the covering ring.
[0009] Further, an inner abutting ring that fits and slides with the side wall of the covering ring is provided at the lower end of the covering ring. A connecting ring plate that movably abuts against the bottom surface of the covering ring is provided at one end of the inner abutting ring away from the covering ring. The connecting ring plate and the covering ring are connected by passing a fastening bolt through them.
[0010] Further, a limiting sliding ring that is limited and slides in the annular groove is further provided at one end of the rubber sealing ring away from the inner abutting ring. The side wall of the limiting sliding ring is flush with the side wall of the covering ring.
[0011] Further, a position - resisting ring with a triangular cross - section is provided at one end of the limiting slip ring away from the rubber sealing ring. The inclined surface of the position - resisting ring faces the inner side of the covering ring, and an oil - storage cavity is formed between it and the annular groove.
[0012] Compared with the prior art, the beneficial effects of this solution are as follows: By additionally providing a covering ring outside the sunken groove in the present utility model, and by opening an annular groove in the covering ring and placing a rubber sealing ring, after the oil pipe is connected to the oil port on the valve body, a double - layer seal is formed at the connection part, significantly reducing the leakage of oil fluid and improving the stability of the servo - valve system. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The schematic diagrams in the specification forming a part of this application are used to provide a further understanding of the present utility model. The schematic illustrative embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0014] Figure 1 is the front - view three - dimensional schematic diagram of the present utility model;
[0015] Figure 2 is the bottom - view three - dimensional schematic diagram of the present utility model;
[0016] Figure 3 is the disassembled schematic diagram of the valve body and the covering ring in the present utility model;
[0017] Figure 4 is the mating schematic diagram between the covering ring and the connecting ring plate in the present utility model;
[0018] Figure 5 is the structural schematic diagram of the covering ring in the present utility model;
[0019] Figure 6 is the sectional three - dimensional schematic diagram of the covering ring in the present utility model;
[0020] Figure 7 is the disassembled schematic diagram of the internal structure of the covering ring in the present utility model.
[0021] In the figures: 1, valve body; 11, oil port; 12, sunken groove; 2, covering ring; 21, annular groove; 22, rubber sealing ring; 3, inner abutting ring; 31, connecting ring plate; 32, fastening bolt; 4, limiting slip ring; 5, position - resisting ring; 51, oil - storage cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in combination with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0023] As Figures 1-7 shown, an anti-leakage structure of a servo valve includes a valve body 1, an oil port 11 provided on the valve body 1, and a sink 12 provided at the end of the oil port 11. A covering ring 2 is provided on the valve body 1 outside the sink 12 and integrally formed with the valve body 1. An annular groove 21 is formed inside the covering ring 2, and a rubber sealing ring 22 is provided in the annular groove 21. When the oil pipe is docked with the oil port 11, an O-ring is placed in the sink 12 and is gradually tightened and pressed by the oil pipe as the oil pipe is connected to the oil port 11, so as to fill the sink 12. A rubber sealing ring 22 is also provided between the oil pipe and the side wall of the covering ring 2. The rubber sealing ring 22 is used to form a two-layer seal by fitting with the outer wall of the oil pipe, improving the anti-leakage effect of the servo valve.
[0024] In one embodiment, the inner circle of the rubber sealing ring 22 is arc-shaped and protrudes from the side wall of the covering ring 2. When the oil pipe is inserted into the inside of the covering ring 2, its outer wall will squeeze the arc surface of the rubber sealing ring 22 to make it deform, so as to fill the gap between the annular groove 21 and the oil pipe tightly, and strengthen the tightness of the rubber sealing ring 22 fitting with the outer wall of the oil pipe.
[0025] In one embodiment, an inner abutting ring 3 is provided at the lower end of the covering ring 2 and slides in a fitting manner with the side wall of the covering ring 2. A connecting ring plate 31 that abuts against the bottom surface of the covering ring 2 is provided at one end of the inner abutting ring 3 away from the covering ring 2. The connecting ring plate 31 and the covering ring 2 are connected by passing a fastening bolt 32 through them. After the oil pipe is docked with the oil port 11, its outer wall will squeeze and deform the arc surface of the rubber sealing ring 22 at this time. To further improve the abutting force between the rubber sealing ring 22 and the oil pipe, the fastening bolt 32 is rotated to make the connection between the connecting ring plate 31 and the covering ring 2 tight. During this process, the inner abutting ring 3 squeezes the bottom of the rubber sealing ring 22, making part of its arc surface tend to protrude towards the side wall of the oil pipe, so that the abutting between the rubber sealing ring 22 and the oil pipe is closer and the sealing effect is strengthened.
[0026] In one embodiment, a limiting sliding ring 4 that is limited and slides within the annular groove 21 is further provided at one end of the rubber sealing ring 22 away from the inner abutting ring 3. The side wall of the limiting sliding ring 4 is flush with the side wall of the covering ring 2. Through the arrangement of the limiting sliding ring 4, one end of the rubber sealing ring 22 is limited inside the annular groove 21, so that when the oil pipe is docked with the oil port 11 or removed from the oil port 11, the rubber sealing ring 22 will not run off from the annular groove 21.
[0027] In one embodiment, a positioning ring 5 with a triangular cross-section is provided at one end of the limiting sliding ring 4 away from the rubber sealing ring 22. The inclined surface of the positioning ring 5 faces the inner side of the covering ring 2. When the connection between the oil pipe and the oil port 11 is stable, the positioning ring 5 will abut against the side wall of the annular groove 21 at this time, and an oil storage cavity 51 is formed. Furthermore, when oil leakage occurs, it will preferentially enter the oil storage cavity 51 and accumulate. After it is full, it will generate pressure on the positioning ring 5, causing it to slide downward, thereby squeezing the rubber sealing ring 22 through the limiting sliding ring 4, further increasing the tendency of the arc surface of the rubber sealing ring 22 to protrude towards the oil pipe side, making the abutment between the rubber sealing ring 22 and the outer wall of the oil pipe tighter, and preventing the oil leaked into the annular groove 21 from flowing out between the covering ring 2 and the oil pipe.
[0028] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims within the present utility model.
Claims
1. A servo valve anti-leakage structure, comprising a valve body (1), an oil port (11) arranged on the valve body (1), and a sink (12) arranged at the end of the oil port (11), characterized in that: The valve body (1) is provided with a covering ring (2) located outside the sink groove (12) and integrally formed with the valve body (1); an annular groove (21) is provided inside the covering ring (2); and a rubber sealing ring (22) is provided inside the annular groove (21).
2. The anti-leakage structure of the servo valve according to claim 1, characterized in that: The inner ring of the rubber sealing ring (22) is arc-shaped and protrudes from the side wall of the covering ring (2).
3. The anti-leakage structure of the servo valve according to claim 2, characterized in that: The lower end of the covering ring (2) is provided with an inner push-in ring (3) which is slidably fitted with the side wall of the covering ring (2); the end of the inner push-in ring (3) which is away from the covering ring (2) is provided with a connecting ring plate (31) which is movably fitted with the bottom surface of the covering ring (2); the connecting ring plate (31) is connected to the covering ring (2) by means of a fastening bolt (32).
4. The anti-leakage structure of the servo valve according to claim 3, characterized in that: The end of the rubber sealing ring (22) away from the inner abutment ring (3) is also provided with a limit slip ring (4) which slides in a limited position in the annular groove (21), and the side wall of the limit slip ring (4) is flush with the side wall of the covering ring (2).
5. The anti-leakage structure of the servo valve according to claim 4, characterized in that: A stop ring (5) with a triangular cross section is provided at one end of the limit sliding ring (4) away from the rubber sealing ring (22); the inclined surface of the stop ring (5) faces the inner side of the covering ring (2), and an oil storage cavity (51) is formed between the stop ring (5) and the annular groove (21).