A sealing device for an oil distribution plate of a hydraulic motor

Abstract

The utility model relates to the technical field of hydraulic motor accessories, and discloses a hydraulic motor oil distribution plate sealing device, including an elastic rubber ring, a cavity is opened inside the elastic rubber ring, a support ring is bonded to the inner wall of the cavity, a through hole is opened inside the support ring, an elastic air bag is arranged inside the through hole, a first magnetic block is fixedly connected to the right side of the elastic air bag, and a second magnetic block is fixedly connected to the left side of the spring. The utility model makes the elastic rubber ring more elastic through the cooperation of the annular EPDM rubber layer and the thermoplastic elastomer layer. At the same time, when the sealing device is installed in the sealing groove of the oil distribution plate, the suction force of the first magnetic block on the oil distribution plate and the suction force of the second magnetic block on the oil through plate can make the sealing device closely contact with the oil distribution plate and the oil through plate respectively, thereby effectively improving the sealing performance of the sealing device and reducing the risk of hydraulic oil leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic motor accessories, in particular to a sealing device for an oil distribution plate of a hydraulic motor. Background Art

[0002] Hydraulic motors convert the liquid pressure energy provided by hydraulic pumps into mechanical energy (torque and speed) of their output shafts. Hydraulic motors, also known as oil motors, are mainly used in injection molding machinery, ships, hoists, engineering machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, marine machinery, petrochemicals, port machinery, etc.

[0003] At present, the hydraulic motor oil distribution plate sealing device on the market is mainly composed of a sealing ring and an O-ring, and the contact surface between the oil pan and the oil distribution plate is sealed by the sealing ring and the O-ring. For example, a hydraulic motor oil distribution plate sealing device disclosed in Chinese Patent Publication No. CN109931311A, but when the sealing device is in use, the hydraulic oil is often easily leaked due to the insufficient contact between the sealing device and the oil distribution plate and the oil through plate. At the same time, when the sealing device is at high temperature or in contact with the oil for a long time, the sealing device is prone to aging and deformation, resulting in sealing failure. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, such as: at present, the hydraulic motor oil distribution plate sealing device on the market is mainly composed of a sealing ring and an O-ring, and the contact surface between the oil through plate and the oil distribution plate is sealed by the sealing ring and the O-ring, but when the sealing device is in use, the hydraulic oil is often easily leaked due to the insufficient contact between the sealing device and the oil distribution plate and the oil through plate. At the same time, when the sealing device is at high temperature or in contact with the oil for a long time, it is easy to cause the seal to fail due to aging and deformation of the sealing device, so a hydraulic motor oil distribution plate sealing device is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic motor oil distribution plate sealing device comprises an elastic rubber ring, a cavity is formed inside the elastic rubber ring, a support ring is bonded to the inner wall of the cavity, a through hole is formed inside the support ring, an elastic air bag is arranged inside the through hole, a first magnetic block is fixedly connected to the right side of the elastic air bag, and a second magnetic block is fixedly connected to the left side of the elastic air bag.

[0007] Preferably, the left side of the first magnetic block is an N pole, and the right side of the second magnetic block is an S pole.

[0008] Preferably, the elastic rubber ring comprises an annular EPDM rubber layer and a thermoplastic elastomer layer, the inner wall of the annular EPDM rubber layer is bonded to the surface of the thermoplastic elastomer layer, and the cavity is located in the thermoplastic elastomer layer.

[0009] Preferably, a heat-resistant and anti-aging layer is bonded to the surface of the annular EPDM rubber layer.

[0010] Preferably, the heat-resistant and anti-aging layer includes a polyimide thermal insulation coating, a zirconium oxide thermal insulation coating, an anti-thermal oxygen aging layer and an oil-resistant and anti-oxidation layer. The inner wall of the polyimide thermal insulation coating is bonded to the surface of the annular EPDM rubber layer, the surface of the polyimide thermal insulation coating is bonded to the inner wall of the zirconium oxide thermal insulation coating, the surface of the zirconium oxide thermal insulation coating is bonded to the inner wall of the anti-thermal oxygen aging layer, and the surface of the anti-thermal oxygen aging layer is bonded to the inner wall of the oil-resistant and anti-oxidation layer.

[0011] Preferably, the thickness ratio of the polyimide thermal insulation coating, the zirconium oxide thermal insulation coating, the thermal oxidation aging resistance layer and the oil resistant oxidation resistance layer is 1:2:1:1.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The utility model makes the elastic rubber ring have higher elasticity by cooperating the annular EPDM rubber layer and the thermoplastic elastomer layer. At the same time, when the sealing device is installed in the sealing groove of the oil distribution plate, the suction force of the first magnetic block on the oil distribution plate and the suction force of the second magnetic block on the oil through plate can make the sealing device closely contact with the oil distribution plate and the oil through plate respectively, thereby effectively improving the sealing performance of the sealing device and reducing the risk of hydraulic oil leakage.

[0014] (2) The utility model provides the sealing device with strong thermal insulation performance by means of the polyimide thermal insulation coating and the zirconium oxide thermal insulation coating in the heat-resistant and anti-aging layer, thereby preventing the sealing device from being deformed due to high temperature. At the same time, by means of the anti-heat-oxidation-aging layer and the oil-resistant and anti-oxidation layer in the heat-resistant and anti-aging layer, the sealing device is not easily aged and deformed when exposed to high temperature or in long-term contact with oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the first embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the second embodiment of the utility model.

[0017] In the figure: 1. elastic rubber ring; 101. annular EPDM rubber layer; 102. thermoplastic elastomer layer; 2. cavity; 3. support ring; 4. through hole; 5. elastic airbag; 6. first magnetic block; 7. second magnetic block; 8. heat-resistant and anti-aging layer; 801. polyimide thermal insulation coating; 802. zirconium oxide thermal insulation coating; 803. anti-thermal oxidation and aging layer; 804. oil-resistant and anti-oxidation layer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] Embodiment 1:

[0021] Reference Figure 1 A sealing device for a hydraulic motor oil distribution plate comprises an elastic rubber ring 1, a cavity 2 is formed inside the elastic rubber ring 1, a support ring 3 is bonded to the inner wall of the cavity 2, a through hole 4 is formed inside the support ring 3, an elastic air bag 5 is arranged inside the through hole 4, a first magnetic block 6 is fixedly connected to the right side of the elastic air bag 5, a second magnetic block 7 is fixedly connected to the left side of the elastic air bag 5, the left side of the first magnetic block 6 is an N pole, and the right side of the second magnetic block 7 is an S pole, the first magnetic block 6 and the second magnetic block 7 are connected together through the elastic air bag 5, and the elasticity of the elastic air bag 5 enables the first magnetic block 6 and the second magnetic block 7 to change automatically, and the sealing device can be in close contact with the oil distribution plate and the oil through plate respectively through the suction force of the first magnetic block 6 on the oil distribution plate and the suction force of the second magnetic block 7 on the oil through plate.

[0022] The elastic rubber ring 1 includes an annular EPDM rubber layer 101 and a thermoplastic elastomer layer 102. The inner wall of the annular EPDM rubber layer 101 is bonded to the surface of the thermoplastic elastomer layer 102. The cavity 2 is located in the thermoplastic elastomer layer 102. The cooperation between the annular EPDM rubber layer 101 and the thermoplastic elastomer layer 102 makes the elastic rubber ring 1 have higher elasticity.

[0023] Embodiment 2:

[0024] Reference Figure 2The surface of the annular EPDM rubber layer 101 is bonded with a heat-resistant and anti-aging layer 8, and the heat-resistant and anti-aging layer 8 includes a polyimide thermal insulation coating 801, a zirconium oxide thermal insulation coating 802, a heat-oxidation and anti-aging layer 803, and an oil-resistant and anti-oxidation layer 804. The inner wall of the polyimide thermal insulation coating 801 is bonded to the surface of the annular EPDM rubber layer 101, the surface of the polyimide thermal insulation coating 801 is bonded to the inner wall of the zirconium oxide thermal insulation coating 802, the surface of the zirconium oxide thermal insulation coating 802 is bonded to the inner wall of the heat-oxidation and anti-aging layer 803, and the surface of the heat-oxidation and anti-aging layer 803 is bonded to the oil-resistant and anti-oxidation layer 804. The inner wall is bonded, and the thickness ratio of the polyimide thermal insulation coating 801, the zirconium oxide thermal insulation coating 802, the heat-resistant and oxygen-resistant aging layer 803 and the oil-resistant and oxidation-resistant layer 804 is 1:2:1:1. The polyimide thermal insulation coating 801 and the zirconium oxide thermal insulation coating 802 in the heat-resistant and anti-aging layer 8 make the sealing device have a strong thermal insulation performance, so that the sealing device will not be deformed due to high temperature. At the same time, the heat-resistant and oxygen-resistant aging layer 803 and the oil-resistant and oxidation-resistant layer 804 in the heat-resistant and anti-aging layer 8 make the sealing device not easy to age and deform when it is at high temperature or in contact with oil for a long time.

[0025] In the utility model, when the user uses the sealing device, the elastic rubber ring 1 is first installed in the sealing groove of the oil distribution plate, and the oil passing plate and the oil distribution plate are installed together. At this time, through the suction force of the first magnetic block 6 on the oil distribution plate and the suction force of the second magnetic block 7 on the oil passing plate, the sealing device can be closely contacted with the oil distribution plate and the oil passing plate respectively, and the contact surface between the oil passing plate and the oil distribution plate can be sealed by the sealing device.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A sealing device for a hydraulic motor oil distribution plate, comprising an elastic rubber ring (1), characterized in that: The elastic rubber ring (1) has a cavity (2) formed inside, the inner wall of the cavity (2) is bonded with a support ring (3), the support ring (3) has a through hole (4) formed inside, an elastic airbag (5) is arranged inside the through hole (4), the right side of the elastic airbag (5) is fixedly connected to a first magnetic block (6), and the left side of the elastic airbag (5) is fixedly connected to a second magnetic block (7).

2. A sealing device for an oil distribution plate of a hydraulic motor according to claim 1, characterized in that: The left side of the first magnetic block (6) is an N pole, and the right side of the second magnetic block (7) is an S pole.

3. A sealing device for an oil distribution plate of a hydraulic motor according to claim 1, characterized in that: The elastic rubber ring (1) comprises an annular ethylene-propylene rubber layer (101) and a thermoplastic elastomer layer (102); the inner wall of the annular ethylene-propylene rubber layer (101) is bonded to the surface of the thermoplastic elastomer layer (102); and the cavity (2) is located in the thermoplastic elastomer layer (102).

4. A sealing device for a hydraulic motor oil distribution plate according to claim 3, characterized in that: A heat-resistant and anti-aging layer (8) is bonded to the surface of the annular EPDM rubber layer (101).

5. A sealing device for a hydraulic motor oil distribution plate according to claim 4, characterized in that: The heat-resistant and anti-aging layer (8) comprises a polyimide thermal insulation coating (801), a zirconium oxide thermal insulation coating (802), an anti-heat-oxidation-aging layer (803) and an oil-resistant and anti-oxidation layer (804); the inner wall of the polyimide thermal insulation coating (801) is bonded to the surface of the annular EPDM rubber layer (101); the surface of the polyimide thermal insulation coating (801) is bonded to the inner wall of the zirconium oxide thermal insulation coating (802); the surface of the zirconium oxide thermal insulation coating (802) is bonded to the inner wall of the anti-heat-oxidation-aging layer (803); and the surface of the anti-heat-oxidation-aging layer (803) is bonded to the inner wall of the oil-resistant and anti-oxidation layer (804).

6. A sealing device for a hydraulic motor oil distribution plate according to claim 5, characterized in that: The thickness ratio of the polyimide thermal insulation coating (801), the zirconium oxide thermal insulation coating (802), the thermal oxidation aging resistance layer (803) and the oil-resistant oxidation resistance layer (804) is 1:2:1:1.

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