Square ring sealing structure of cycloid hydraulic motor

Abstract

The utility model relates to the field of sealing, and discloses a square ring sealing structure of a cycloid hydraulic motor, which comprises a sealing ring structure, the sealing ring structure is arranged at the front end inside the cycloid hydraulic motor, the sealing ring structure is square, four corners of the sealing ring structure are all rounded, and the sealing ring structure is of a square shape. According to the utility model, through the arrangement of the sealing ring structure, an original O-shaped ring sealing structure is changed into a square ring sealing structure, the square structure of the sealing ring enables the sealing area of a sealing area to be larger, and in the sealing process, the larger contact area means that under the same pressure, the sealing effect is better, and the sealing effect is better. According to the cycloid hydraulic motor, the pressure distribution in unit area is more uniform, local stress concentration can be reduced, the risk that a sealing piece is sucked into an oil cavity is reduced, and compared with an existing traditional cycloid hydraulic motor product, the cycloid hydraulic motor can effectively solve the problems of poor sealing performance and air suction in the hydraulic motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the sealing field especially relates to a swing hydraulic motor square ring sealing structure. BACKGROUND

[0002] The hydraulic motor is widely used in various engineering machinery, mine and metallurgical machinery and other mechanical equipment fields as an executing element of the hydraulic system

[0003] The swing hydraulic motor often encounters start, stop, speed change and direction change during the working process, for the running hydraulic motor, the change of the working state of the hydraulic motor forms a low pressure area in the oil cavity due to the inertia effect, which causes great load on the local sealing element of the hydraulic motor, and even the sealing ring can be sucked into the oil cavity, causing the motor to leak oil. UTILITARIAN CONTENT

[0004] In view of the defects of the prior art, the utility model provides a swing hydraulic motor square ring sealing structure, which solves the problem of great local load caused by the change of the working state of the sealing element of the swing hydraulic motor.

[0005] To achieve the above object, the utility model realizes the following technical scheme: a swing hydraulic motor square ring sealing structure, which comprises a sealing ring structure, the sealing ring structure is arranged at the inner front end of the swing hydraulic motor, the sealing ring structure is square in shape, and the four corners of the sealing ring structure are all rounded, and the center of the four edges of the sealing ring structure all protrude outward;

[0006] The sealing ring structure comprises an oxidation-resistant layer, a temperature insulation layer and a rubber layer, the rubber layer is located at the middle position of the sealing ring structure, the temperature insulation layer is covered on the inner and outer sides of the rubber layer, and the oxidation-resistant layer is covered on the outer sides of the two temperature insulation layers.

[0007] Preferably, a rotor hole groove is formed in the middle of the sealing ring structure.

[0008] Preferably, a plug hole is formed in each of the four corners of the sealing ring structure, and a sealing washer is arranged on the inner side of each plug hole.

[0009] Preferably, the material of the oxidation-resistant layer is polytetrafluoroethylene.

[0010] Preferably, the material of the temperature insulation layer is silicone rubber.

[0011] Preferably, the material of the rubber layer is nitrile rubber.

[0012] Beneficial effects

[0013] The utility model provides a swing hydraulic motor square ring sealing structure, which has the following beneficial effects compared with the prior art:

[0014] 1. The utility model discloses a sealing ring structure is provided, through the former "O" ring sealing structure is changed into square ring sealing structure, and the sealing ring square structure makes the sealing area of sealing area bigger, and in the sealing process, the bigger contact area means that the pressure distribution on unit area is more uniform under the same pressure, and it is helpful to reduce the local stress concentration, thereby reduce the risk that the sealing element is sucked into the oil cavity, and compared with the prior art cycloid hydraulic motor product, the utility model discloses can effectively solve the problem of poor sealing and air suction in the hydraulic motor.

[0015] 2. The utility model discloses an antioxidant layer, temperature insulation layer and rubber layer are set up, and the rubber layer is located in the middle position of sealing ring structure, adopts nitrile rubber material, has good elasticity and oil resistance, can adapt to the movement and vibration of rotor simultaneously, and the temperature insulation layer is covered on the inside and outside of rubber layer, adopts silicon rubber material, has good temperature insulation and high and low temperature resistance, and the effect of temperature insulation layer is to isolate the influence of high temperature of hydraulic oil to rubber layer, prevents rubber layer from aging due to temperature change, keeps its sealing performance, and the antioxidant layer is covered on the outside of temperature insulation layer, adopts polytetrafluoroethylene material, has excellent oxidation resistance and chemical resistance, and the antioxidant layer can protect temperature insulation layer and rubber layer from oxidation and chemical corrosion, prolongs the service life of sealing ring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram after installing the square ring sealing structure of the utility model of a cycloid hydraulic motor;

[0017] Figure 2 It is a three-dimensional structure schematic diagram of the square ring sealing structure of the utility model of a cycloid hydraulic motor;

[0018] Figure 3 It is a sectional structure schematic diagram of the square ring sealing structure of the utility model of a cycloid hydraulic motor;

[0019] Figure 4 It is a square ring sealing structure of the utility model of a cycloid hydraulic motor Figure 3 The enlarged view of A in the utility model.

[0020] Legend:

[0021] 1, sealing ring structure, 101, antioxidant layer, 102, temperature insulation layer, 103, rubber layer, 2, bolt hole, 3, sealing washer, 4, cycloid hydraulic motor, 5, rotor hole groove. DETAILED DESCRIPTION

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0023] Please refer to Figures 1-4 The present application provides two technical solutions, specifically including the following embodiments:

[0024] Embodiment one:

[0025] A square ring sealing structure of a cycloid hydraulic motor, comprising a sealing ring structure 1, the sealing ring structure 1 is arranged at the inner front end of the cycloid hydraulic motor 4, the area corresponding to the cycloid hydraulic motor 4 at the rear side of the sealing ring structure 1 is an oil cavity, the sealing ring structure 1 is square in shape, and the increased sealing area of the square ring sealing structure helps to disperse pressure. In the sealing process, the larger contact area means that the pressure distribution on the unit area is more uniform under the same pressure, which helps to reduce local stress concentration, thereby reducing the risk of the sealing element being sucked into the oil cavity. In addition, the four corners of the sealing ring structure 1 are all rounded, the center of each side of the sealing ring structure 1 is all raised outward, a rotor hole slot 5 is formed in the middle of the sealing ring structure 1, and a latch hole 2 is formed in each corner of the sealing ring structure 1. A sealing washer 3 is arranged in the inner side of each latch hole 2, and four latches are respectively inserted tightly into the four latch holes 2 of the sealing ring structure 1. The end of the latch is inserted into the corresponding hole slot in the inner part of the cycloid hydraulic motor 4, so that the sealing ring structure 1 and the cycloid hydraulic motor 4 are kept close.

[0026] During work, the sealing ring structure 1 is installed on the outer side of the rotor at the inner front end of the cycloid hydraulic motor 4. The square sealing structure of the sealing ring makes the sealing area of the sealing area larger, reduces local stress concentration, thereby reducing the risk of the sealing element being sucked into the oil cavity. During the use of the sealing structure, the sealing property can be improved, thereby preventing water from entering or leakage from causing certain influence, and making the sealing ring have better sealing property.

[0027] Embodiment two:

[0028] On the basis of embodiment one, the sealing ring structure 1 comprises an antioxidant layer 101, a temperature insulation layer 102 and a rubber layer 103, the rubber layer 103 is located in the middle position of the sealing ring structure 1, the rubber layer 103 is covered with the temperature insulation layer 102 on the inner and outer sides, the inner and outer temperature insulation layers 102 are covered with the antioxidant layer 101 on the outer sides, the material of the antioxidant layer 101 is polytetrafluoroethylene, the antioxidant layer 101 is covered on the outer side of the temperature insulation layer 102, the material of the antioxidant layer 101 is polytetrafluoroethylene, which has excellent oxidation resistance and chemical resistance, the antioxidant layer 101 can protect the temperature insulation layer 102 and the rubber layer 103 from oxidation and chemical corrosion, prolong the service life of the sealing ring, the material of the temperature insulation layer 102 is silicone rubber, the temperature insulation layer 102 is covered on the inner and outer sides of the rubber layer 103, the material of the temperature insulation layer 102 is silicone rubber, which has good temperature insulation and high and low temperature resistance, the temperature insulation layer 102 can isolate the influence of high temperature of hydraulic oil on the rubber layer 103, prevent the rubber layer 103 from aging due to temperature change, and maintain the sealing performance, the material of the rubber layer 103 is nitrile rubber, the rubber layer 103 is located in the middle position of the sealing ring structure 1, the material of the rubber layer 103 is nitrile rubber, which has good elasticity and oil resistance, and can adapt to the movement and vibration of the rotor.

[0029] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the present application.

Claims

1. A seal structure for a square ring of a gerotor motor, comprising a seal ring structure (1), characterized in that: The sealing ring structure (1) is arranged at the inner front end of the cycloid hydraulic motor (4), the sealing ring structure (1) is square in shape, the four corners of the sealing ring structure (1) are all rounded, and the center of each side of the sealing ring structure (1) is raised outward. The sealing ring structure (1) comprises an oxidation-resistant layer (101), a temperature-insulating layer (102) and a rubber layer (103), the rubber layer (103) is located at the middle position of the sealing ring structure (1), the rubber layer (103) is covered with the temperature-insulating layer (102) on the inner and outer sides, and the outer sides of the two temperature-insulating layers (102) are covered with the oxidation-resistant layer (101).

2. The seal structure for a square-shaped ring of a gerotor hydraulic motor according to claim 1, wherein: The sealing ring structure (1) is provided with a rotor hole (5) in the middle.

3. The seal structure for a square-shaped ring of a gerotor hydraulic motor according to claim 1, wherein: The sealing ring structure (1) is provided with a bolt hole (2) at each corner, and each bolt hole (2) is provided with a sealing washer (3) on the inner side.

4. The seal structure for a square-shaped ring of a gerotor hydraulic motor according to claim 1, wherein: The oxidation-resistant layer (101) is made of polytetrafluoroethylene.

5. The gerotor motor square ring seal structure of claim 1, wherein: The temperature-insulating layer (102) is made of silicone rubber.

6. The gerotor motor square ring seal structure of claim 1, wherein: The rubber layer (103) is made of nitrile rubber.

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