Miniature hydraulic station pressure maintaining oil seal structure

Abstract

The utility model discloses a miniature hydraulic station pressure maintaining oil seal structure which comprises a hydraulic oil cylinder, a cylinder cover positioning groove is formed in the hydraulic oil cylinder, a cylinder cover boss is connected to the inner surface of the cylinder cover positioning groove in a sliding mode, and an oil seal installation groove is formed in the cylinder cover boss. The inner surface of the oil seal mounting groove is fixedly connected with a first oil seal positioning clamping block, a Y-shaped oil seal is arranged in the oil seal mounting groove, the inner surface of the Y-shaped oil seal is provided with a second oil seal positioning clamping block, and a reinforcing framework is arranged in the Y-shaped oil seal. An oil seal positioning clamping block matched with the Y-shaped oil seal is arranged on the inner side of the Y-shaped oil seal, the Y-shaped oil seal can be prevented from displacing in the moving process of the piston rod, so that the stable sealing effect is guaranteed, the position of the Y-shaped oil seal can be more accurately installed through the oil seal positioning clamping block during installation, the poor sealing effect caused by installation deviation is avoided, and the service life of the piston rod is prolonged. And the pressure maintaining effect of the oil seal is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic stations, in particular to a pressure-maintaining oil seal structure of a micro hydraulic station. Background Art

[0002] An oil seal is a mechanical component used to seal rotating shafts or reciprocating shafts. Its main function is to prevent the leakage of liquids such as lubricating oil and hydraulic oil, and to prevent external dust, impurities and moisture from entering the interior of mechanical equipment. Currently, most common oil seals are made of rubber materials. Some oil seals are equipped with a skeleton inside the rubber case. The pressure-maintaining oil seal structure is used in hydraulic systems or other equipment that requires sealing and maintaining pressure to prevent liquid or gas leakage and maintain a certain pressure as a sealing component.

[0003] Currently, oil seals have high requirements for their installation during use. Imprecise installation positions will cause the oil seals to not function properly, or even fail quickly, or oil leakage will occur. In addition, the movement of the piston rod during the use of the oil seal will cause the oil seal to move, thereby reducing the effectiveness of the oil seal. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art, and provides a pressure-maintaining oil seal structure for a micro hydraulic station, wherein a Y-shaped oil seal is arranged in an oil seal mounting groove, and an oil seal positioning block matching the Y-shaped oil seal is arranged on the inner side of the Y-shaped oil seal, and the oil seal positioning block can prevent the Y-shaped oil seal from being displaced during the movement of the piston rod, thereby ensuring a stable sealing effect, and the oil seal positioning block can more accurately position the Y-shaped oil seal during installation, thereby avoiding poor sealing effect due to installation deviation, and thus improving the pressure-maintaining effect of the oil seal.

[0005] To achieve the above-mentioned purpose, the utility model also provides a micro hydraulic station pressure-maintaining oil seal structure as mentioned above, including: a hydraulic cylinder, a cylinder inner cavity is arranged inside the hydraulic cylinder, a cylinder head positioning groove is arranged inside the hydraulic cylinder, the inner surface of the cylinder head positioning groove is slidably connected with a cylinder head boss, the right surface of the cylinder head boss is fixedly connected with the cylinder head, a first threaded hole is arranged inside the cylinder head, a piston rod is slidably connected with the inner surface of the cylinder head, an oil seal mounting groove is arranged inside the cylinder head boss, the inner surface of the oil seal mounting groove is fixedly connected with a first oil seal positioning block, a Y-shaped oil seal is arranged inside the oil seal mounting groove, a second oil seal positioning block is arranged on the inner surface of the Y-shaped oil seal, and a reinforcing skeleton is arranged inside the Y-shaped oil seal.

[0006] According to the micro hydraulic station pressure-maintaining oil seal structure, a bolt is threadedly connected to the inner surface of the first threaded hole, and a second threaded hole is provided inside the hydraulic cylinder.

[0007] According to the micro hydraulic station pressure-maintaining oil seal structure, the side surface of the bolt is threadedly connected to the second threaded hole, and the side surface of the bolt is threadedly connected to the hydraulic cylinder. The hydraulic cylinder is connected to the cylinder head through the bolt, and the connection is tighter and the structure is more stable.

[0008] According to the micro hydraulic station pressure-maintaining oil seal structure, the number of the first threaded holes is multiple and distributed in a ring shape, and the material of the Y-shaped oil seal is nitrile rubber, which has good oil resistance, wear resistance and heat resistance and is widely applicable.

[0009] According to the micro hydraulic station pressure-maintaining oil seal structure, the side surface of the piston rod is slidably connected to the Y-shaped oil seal, and the material of the first oil seal positioning block is stainless steel. Stainless steel has good corrosion resistance and strength, and can be used for a long time in a hydraulic oil environment without rusting. The first oil seal positioning block is compatible with the Y-shaped oil seal.

[0010] According to the micro hydraulic station pressure-maintaining oil seal structure, the reinforcing skeleton is made of alloy, and the second oil seal positioning block is made of copper alloy. Copper alloy has excellent thermal conductivity, can conduct heat to the Y-shaped oil seal, and support the Y-shaped oil seal to make the structure more stable.

[0011] According to the micro hydraulic station pressure-maintaining oil seal structure, the side surface of the piston rod is slidably connected to the second oil seal positioning block, and the side surface of the piston rod is slidably connected to the cylinder head boss.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 This is a schematic diagram of the overall structure of a pressure-maintaining oil seal structure of a micro hydraulic station of the utility model;

[0015] Figure 2 This is a cross-sectional view of a hydraulic cylinder of a pressure-maintaining oil seal structure of a micro hydraulic station of the utility model;

[0016] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0017] Figure 4 The utility model is an exploded view of a pressure-maintaining oil seal structure of a micro hydraulic station.

[0018] Legend:

[0019] 1. Hydraulic cylinder; 2. Cylinder cavity; 3. Cylinder head positioning groove; 4. Cylinder head boss; 5. Cylinder head; 6. First threaded hole; 7. Bolt; 8. Second threaded hole; 9. Oil seal mounting groove; 10. Y-shaped oil seal; 11. First oil seal positioning block; 12. Second oil seal positioning block; 13. Reinforced frame; 14. Piston rod. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4The utility model embodiment is a micro hydraulic station pressure-maintaining oil seal structure, comprising: a hydraulic cylinder 1, wherein the hydraulic cylinder 1 is provided with an oil cylinder inner cavity 2, wherein the hydraulic cylinder 1 is provided with a cylinder head positioning groove 3, wherein the inner surface of the cylinder head positioning groove 3 is slidably connected with a cylinder head boss 4, wherein the right surface of the cylinder head boss 4 is fixedly connected with a cylinder head 5, wherein the cylinder head 5 is provided with a first threaded hole 6, wherein the inner surface of the first threaded hole 6 is threadedly connected with a bolt 7, wherein the hydraulic cylinder 1 is provided with a second threaded hole 8, wherein the side surface of the bolt 7 is threadedly connected with the second threaded hole 8, wherein the The side surface of the bolt 7 is threadedly connected to the hydraulic cylinder 1. The number of the first threaded holes 6 is multiple and annularly distributed. The hydraulic cylinder 1 is connected to the cylinder head 5 by the bolt 7, and the multiple bolts 7 make the structural connection more firm and stable. The inner surface of the cylinder head 5 is slidably connected with a piston rod 14. The cylinder head boss 4 is provided with an oil seal mounting groove 9. The inner surface of the oil seal mounting groove 9 is fixedly connected with a first oil seal positioning block 11. The oil seal mounting groove 9 is provided with a Y-shaped oil seal 10. The Y-shaped oil seal 10 has a pressure-maintaining effect on the hydraulic cylinder 1. The inner surface of the Y-shaped oil seal 10 is provided with a A second oil seal positioning block 12 is provided, and a reinforcing skeleton 13 is provided inside the Y-shaped oil seal 10. The material of the Y-shaped oil seal 10 is nitrile rubber, which has good oil resistance, wear resistance and heat resistance and is widely applicable. The structure of the Y-shaped oil seal 10 can adapt to a certain degree of pressure changes, and can still maintain a good sealing effect when the pressure fluctuates, which helps to stabilize the system pressure. When the pressure in the system increases, the Y-shaped lip of the Y-shaped oil seal 10 will be subjected to pressure and fit the sealing surface more closely, thereby enhancing the sealing ability, thereby effectively preventing pressure leakage and maintaining pressure stability. The side surface of the piston rod 14 is slidably connected to the Y-shaped oil seal 10. The first oil seal positioning block 11 is made of stainless steel, which has good corrosion resistance and strength. The reinforcing skeleton 13 is made of alloy, and the second oil seal positioning block 12 is made of copper alloy. The first oil seal positioning block 11 and the second oil seal positioning block 12 are adapted to the Y-shaped oil seal 10, and make the Y-shaped oil seal 10 more stable in the oil seal mounting groove 9. The side surface of the piston rod 14 is slidably connected to the second oil seal positioning block 12, and the side surface of the piston rod 14 is slidably connected to the cylinder head boss 4.

[0022] Working principle: When in use, the Y-shaped oil seal 10 is placed in the first oil seal positioning block 11 that matches the Y-shaped oil seal 10, with the opening of the Y-shaped oil seal 10 facing the side with pressure. The placement position of the Y-shaped oil seal 10 can be found more accurately through the first oil seal positioning block 11, and the second oil seal positioning block 12 is set to make the structure of the Y-shaped oil seal 10 in the oil seal installation groove 9 more stable, avoiding the displacement of the Y-shaped oil seal 10 when the piston rod 14 moves, and the structure of the Y-shaped oil seal 10 can adapt to a certain degree of pressure changes, and can still maintain a good sealing effect when the pressure fluctuates, which helps to stabilize the system pressure. When the pressure in the system increases, the Y-shaped lip of the Y-shaped oil seal 10 will be affected by the pressure and become more In order to more closely fit the sealing surface and enhance the sealing ability, thereby effectively preventing pressure leakage and maintaining pressure stability, the structure arranges a Y-shaped oil seal 10 in the oil seal installation groove 9, and arranges a first oil seal positioning block 11 and a second oil seal positioning block 12 matching the Y-shaped oil seal 10 on the inner side of the Y-shaped oil seal 10. The first oil seal positioning block 11 and the second oil seal positioning block 12 can prevent the Y-shaped oil seal 10 from being displaced during the movement of the piston rod 14, thereby ensuring a stable sealing effect. In addition, the first oil seal positioning block 11 and the second oil seal positioning block 12 can more accurately install the position of the Y-shaped oil seal 10 during installation, thereby avoiding poor sealing effect due to installation deviation, thereby improving the pressure maintaining effect of the Y-shaped oil seal 10.

[0023] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A pressure-maintaining oil seal structure for a micro hydraulic station, characterized in that: include: A hydraulic cylinder (1), wherein an inner cylinder cavity (2) is provided inside the hydraulic cylinder (1), a cylinder head positioning groove (3) is provided inside the hydraulic cylinder (1), a cylinder head boss (4) is slidably connected to the inner surface of the cylinder head positioning groove (3), a cylinder head (5) is fixedly connected to the right surface of the cylinder head boss (4), a first threaded hole (6) is provided inside the cylinder head (5), a piston rod (14) is slidably connected to the inner surface of the cylinder head (5), an oil seal installation groove (9) is provided inside the cylinder head boss (4), a first oil seal positioning block (11) is fixedly connected to the inner surface of the oil seal installation groove (9), a Y-shaped oil seal (10) is provided inside the oil seal installation groove (9), a second oil seal positioning block (12) is provided on the inner surface of the Y-shaped oil seal (10), and a reinforcing frame (13) is provided inside the Y-shaped oil seal (10).

2. A micro hydraulic station pressure-maintaining oil seal structure according to claim 1, characterized in that: The inner surface of the first threaded hole (6) is threadedly connected with a bolt (7), and a second threaded hole (8) is provided inside the hydraulic cylinder (1).

3. A micro hydraulic station pressure-maintaining oil seal structure according to claim 2, characterized in that: The side surface of the bolt (7) is threadedly connected to the second threaded hole (8), and the side surface of the bolt (7) is threadedly connected to the hydraulic cylinder (1).

4. A micro hydraulic station pressure-maintaining oil seal structure according to claim 1, characterized in that: The first threaded holes (6) are multiple in number and distributed in an annular shape, and the Y-shaped oil seal (10) is made of nitrile rubber.

5. The micro hydraulic station pressure-maintaining oil seal structure according to claim 1, characterized in that: The side surface of the piston rod (14) is slidably connected to the Y-shaped oil seal (10), and the first oil seal positioning block (11) is made of stainless steel.

6. A micro hydraulic station pressure-maintaining oil seal structure according to claim 1, characterized in that: The material of the reinforcing frame (13) is an alloy, and the material of the second oil seal positioning block (12) is a copper alloy.

7. The pressure-maintaining oil seal structure of a micro hydraulic station according to claim 1, characterized in that: The side surface of the piston rod (14) is slidably connected to the second oil seal positioning block (12), and the side surface of the piston rod (14) is slidably connected to the cylinder head boss (4).

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