Guide sleeve sealing structure of hydraulic servo-motor and hydraulic servo-motor

Abstract

The guide sleeve sealing structure comprises a guide sleeve body of the hydraulic servo-motor, a USH sealing ring, a first step seal sealing ring and a second step seal sealing ring, the inner side of the guide sleeve body is of a hollow structure, and a first sealing groove, a second sealing groove and a third sealing groove are sequentially formed in the guide sleeve body. The USH sealing ring is located in the first sealing groove, the first step seal sealing ring is located in the second sealing groove, and the second step seal sealing ring is located in the third sealing groove. Compared with the prior art, reliable sealing can be provided for static sealing or dynamic sealing, so that normal work of the hydraulic servo-motor is guaranteed, and reliability and stability of the whole system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil motor sealing structure field especially oil motor's guide sleeve sealing structure and oil motor. BACKGROUND

[0002] The sealing form of the existing oil motor mainly includes static sealing and dynamic sealing. The static sealing refers to the sealing of the sealing part in the relative static state to prevent medium leakage. The dynamic sealing refers to the sealing of the sealing part in the relative motion state to prevent medium leakage. At present, as shown in the figure, the 660MW oil motor guide sleeve uses two stellite seals for sealing. In addition, the utility model discloses an oil motor in the utility model with publication number CN210978044U, which is provided with two stellite seals for sealing the guide sleeve, and specifically comprises a shell and a piston rod sleeved in the shell, wherein: a first mounting hole is arranged at the first side end of the shell; the connecting end of the piston rod protrudes out of the first mounting hole and is coaxially connected with the valve door rod, a first sealing ring and a second sealing ring are arranged between the inner wall of the first mounting hole and the piston rod; an annular oil groove is arranged on the contact surface between the inner wall of the first mounting hole and the piston rod, and the annular oil groove is located between the first sealing ring and the second sealing ring. Figure 1 The sealing form of the above-mentioned oil motor guide sleeve has the following defects:

[0003] The stellite seal can only be deformed during installation, and the original sealing performance cannot be maintained, which may cause oil leakage and seepage during operation.

[0004] UTILITY MODEL CONTENTS The utility model discloses an oil motor guide sleeve sealing structure and an oil motor.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] An oil motor guide sleeve sealing structure, comprising an oil motor guide sleeve main body, an USH sealing ring, a first stellite seal ring and a second stellite seal ring, the inner side of the guide sleeve main body is a hollow structure, and is sequentially provided with a first sealing groove, a second sealing groove and a third sealing groove, the USH sealing ring is located in the first sealing groove, the first stellite seal ring is located in the second sealing groove, and the second stellite seal ring is located in the third sealing groove.

[0008] Further, the first sealing groove is located in the middle part of the guide sleeve main body.

[0009] Further, one end of the guide sleeve body is provided with an annular oil groove, and an oil groove pipeline is connected to the annular oil groove, one end of the oil groove pipeline is connected to the annular oil groove, and the other end penetrates to the outside of the guide sleeve body.

[0010] Further, the second sealing groove and the third sealing groove are located on both sides of the annular oil groove.

[0011] Further, the second sealing groove and the third sealing groove are of the same size.

[0012] Further, the first sealing groove is wider than the sum of the widths of the second sealing groove and the third sealing groove.

[0013] Further, the USH sealing ring is made of polyurethane.

[0014] Further, the piston rod for installing the oil motor in the guide sleeve body, the USH sealing ring, the first St sealing ring and the second St sealing ring are all in interference fit with the piston rod.

[0015] Further, the edges of the first sealing groove, the second sealing groove and the third sealing groove are all rounded.

[0016] The utility model also provides an oil motor which comprises the guide sleeve sealing structure of the oil motor.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] (1) The utility model transforms the guide sleeve sealing structure of the oil motor, installs a USH ring sealing outside the original two St sealings, the USH ring is commonly made of polyurethane, has higher hardness and wear resistance, can bear frequent friction without being easily damaged. And the USH ring has good elasticity and resilience, can tightly adhere to the sealing surface, effectively prevents leakage, and can provide reliable sealing whether static sealing or dynamic sealing.

[0019] (2) In the working environment of the oil motor, the internal oil needs to be effectively sealed. The original two sealing rings have oil seepage phenomenon and certain oil leakage probability. Three sealing rings are equivalent to increase a sealing defense line, further increase the sealing property of the sealing assembly, prevent oil leakage and seepage, and reduce the oil loss in the system. In actual operation, the three-sealing-ring sealing system can maintain good sealing effect under more severe working conditions (such as high temperature, high pressure, and oil with certain impurities), reduce the oil leakage amount caused by poor sealing. The reduction of leakage amount helps to maintain the pressure stability of the oil in the oil motor, thereby ensuring the normal work of the oil motor and improving the reliability and stability of the whole system.

[0020] (3) The utility model discloses also optimized the position of three sealing rings, and the two stefen sealing rings are arranged at the two sides of the annular oil groove according to the leakage problem of the annular oil groove, and the sealing effect of the annular oil groove is improved, the USH sealing ring (2) is arranged at the middle part of the guide sleeve, and the thickness and width are increased, and the sealing surface is closely adhered, the main body is sealed and leakage is prevented, and the whole has better sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a guide sleeve structure schematic view of oil motor provided in the background art of the utility model;

[0022] Figure 2 It is a guide sleeve sealing structure schematic view of oil motor provided in the embodiment of the utility model;

[0023] In the drawing, 1, guide sleeve main body, 2, USH sealing ring, 3, first stefen sealing ring, 4, second stefen sealing ring, 5, annular oil groove, 6, oil groove pipeline. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment of the utility model.The components of the embodiment of the utility model described and shown in the drawing here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiment of the utility model provided in the drawing is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.Based on the embodiment in the utility model, all other embodiments obtained by ordinary skilled in the art without creative labor are within the scope of the protection of the utility model.

[0026] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0027] In the description of the utility model, it needs to be explained that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0028] It needs to be explained that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] Embodiment 1

[0031] As shown in Figure 2 The utility model provides a guide bush sealing structure of oil motor, including guide bush main part 1 of oil motor, USH sealing ring 2, first ster seal sealing ring 3 and second ster seal sealing ring 4, the inside of guide bush main part 1 is hollow structure, and is equipped with first sealing groove, second sealing groove and third sealing groove in proper order, USH sealing ring 2 is located in first sealing groove, first ster seal sealing ring 3 is located in second sealing groove, and second ster seal sealing ring 4 is located in third sealing groove.

[0032] Preferably, one end of the guide bush main body 1 is provided with an annular oil groove 5, and the annular oil groove 5 is connected with an oil groove pipeline 6. One end of the oil groove pipeline 6 is connected with the annular oil groove 5, and the other end penetrates to the outside of the guide bush main body 1.

[0033] Preferably, the second sealing groove and the third sealing groove are located on both sides of the annular oil groove 5. In view of the leakage problem of the annular oil groove, two ster seal sealing rings are arranged on both sides of the annular oil groove, thereby improving the sealing effect of the annular oil groove.

[0034] Preferably, the second sealing groove and the third sealing groove have the same size, so as to ensure the balance of the sealing effect on both sides of the annular oil groove 5.

[0035] Preferably, the first sealing groove is located in the middle of the guide sleeve body 1, and the width of the first sealing groove is greater than the sum of the widths of the second sealing groove and the third sealing groove. That is, the USH sealing ring 2 is arranged in the middle of the guide sleeve, and the thickness and width are increased to tightly fit the sealing surface, realize the main body sealing and prevent leakage, and the overall sealing effect is better.

[0036] The commonly used material of the USH sealing ring 2 is polyurethane, which has high hardness and wear resistance and can withstand frequent friction without being easily damaged. Moreover, the USH ring has good elasticity and resilience, can tightly fit the sealing surface, effectively prevent leakage, and can provide reliable sealing whether it is static sealing or dynamic sealing.

[0037] For the materials of each sealing ring, the working medium, temperature, pressure and other factors are considered to select a sealing ring material suitable for the working conditions, so as to ensure that the sealing ring has good wear resistance, corrosion resistance and sealing performance. According to the size and shape of the sealing part, a suitable sealing ring specification is selected to ensure that the sealing ring can tightly fit the sealing surface and achieve good sealing effect. At the same time, the added sealing ring cannot have a tendency of stick-slip motion, so as to ensure the normal operation of the oil motor.

[0038] The guide sleeve body 1 is used to install the piston rod of the oil motor, and preferably, the USH sealing ring 2, the first Stellite sealing ring 3 and the second Stellite sealing ring 4 are all in interference fit with the piston rod. That is, each sealing ring can have a proper compression amount after installation, so as to ensure the sealing performance.

[0039] Preferably, the edges of the first sealing groove, the second sealing groove and the third sealing groove are all rounded to avoid that the edges of the sealing grooves are too sharp to damage the sealing ring.

[0040] The embodiment also provides an oil motor, which comprises the guide sleeve sealing structure of the oil motor as above to install the piston rod in the corresponding guide sleeve.

[0041] The above describes the preferred embodiments of the present application in detail. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A guide sleeve sealing structure for a hydraulic actuator, characterized in that, The guide sleeve body (1) of the oil motor comprises a guide sleeve body (1), an USH sealing ring (2), a first Ster seal sealing ring (3) and a second Ster seal sealing ring (4), the inner side of the guide sleeve body (1) is a hollow structure, and is sequentially provided with a first sealing groove, a second sealing groove and a third sealing groove, the USH sealing ring (2) is located in the first sealing groove, the first Ster seal sealing ring (3) is located in the second sealing groove, and the second Ster seal sealing ring (4) is located in the third sealing groove.

2. The oil seal structure of a governor bushing of an oil turbine governor according to claim 1, wherein The first sealing groove is located in the middle of the guide sleeve body (1).

3. The oil seal structure of a governor bushing of an oil turbine governor according to claim 1, wherein One end of the guide sleeve body (1) is provided with an annular oil groove (5), the annular oil groove (5) is connected with an oil groove pipeline (6), one end of the oil groove pipeline (6) is connected with the annular oil groove (5), and the other end penetrates to the outside of the guide sleeve body (1).

4. The oil seal structure of a governor bushing of an oil turbine governor according to claim 3, wherein The second sealing groove and the third sealing groove are located on both sides of the annular oil groove (5) respectively.

5. The oil seal structure for a guide bush of an oil motor according to claim 4, wherein The sizes of the second sealing groove and the third sealing groove are the same.

6. The oil seal structure for a guide bush of an oil motor according to claim 1, wherein The width of the first sealing groove is greater than the sum of the widths of the second sealing groove and the third sealing groove.

7. The oil seal structure for a guide bush of an oil motor according to claim 1, wherein The USH sealing ring (2) is made of polyurethane material.

8. The oil seal structure for a guide bush of an oil motor according to claim 1, wherein The piston rod for installing the oil motor in the guide sleeve body (1) is provided with the USH sealing ring (2), the first Ster seal sealing ring (3) and the second Ster seal sealing ring (4), and the piston rod is in interference fit with the USH sealing ring (2), the first Ster seal sealing ring (3) and the second Ster seal sealing ring (4).

9. The oil seal structure for a guide bush of an oil motor according to claim 1, wherein The edges of the first sealing groove, the second sealing groove and the third sealing groove are all round corners.

10. An oil motor characterized by comprising: The guide sleeve sealing structure of the oil motor comprises the guide sleeve sealing structure of the oil motor.

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