Mechanical seal with anti-slip function

Abstract

This utility model discloses a mechanical seal with anti-slip function, comprising: a spring seat, a compression spring fixed to the right periphery of the spring seat, a push ring engaged and fixed to the right side of the compression spring, a moving ring assembled to the right side of the push ring, a stationary ring slidably fitted to the right side of the moving ring, a pressure cap engaged and fixed to the right outer side of the stationary ring, several arc-shaped clamps arranged in an annular array on the outer side of the stationary ring, the opposite ends of the arc-shaped clamps being embedded in and slidingly engaged with the inner wall of the stationary ring, a return spring assembly fixedly connected to the opposite side of the arc-shaped clamps, a pad fixedly connected to the opposite side of the return spring assembly, the outer side of the pads being fixedly connected to the stationary ring, and several slots arranged in an annular array on the right inner side of the pressure cap, which can limit the rotation of the two after the stationary ring is installed in the pressure cap, avoiding friction and slippage problems and improving the overall sealing strength.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a mechanical seal with anti-slip function. Background Technology

[0002] Mechanical seals are precision and complex mechanical components. They are key parts of various pumps, reaction vessels, turbine compressors, submersible motors, and other equipment. A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation keep in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, as well as the cooperation of auxiliary seals.

[0003] The rotating ring and stationary ring, which are important components, are squeezed and slid together by spring force and medium force. The rotating ring rotates synchronously with the main shaft, while the stationary ring is fixed to the gland. However, under long-term operation, the relative torsional force generated by the relative rotation and sliding contact between the rotating ring and the stationary ring will continue to act on the rotating ring and the stationary ring themselves. This can easily cause relative rotation and slippage between the rotating ring and the push ring, which in turn causes the rotating ring and the main shaft to rotate out of sync, reducing the sealing strength of the fluid. At the same time, the stationary ring is also prone to relative friction and slippage with the gland, causing fluid leakage on the side between the gland and the stationary ring. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical seal with anti-slip function, which can perform axial multiple engagement and limiting of the push ring and the moving ring, improve the tightness of the connection between the two, avoid relative rotational slippage during long-term operation, and ensure sealing stability. In addition, it limits the rotation of the stationary ring and the gland to avoid frictional slippage and improve the overall sealing strength.

[0005] To achieve the above objectives, a mechanical seal with anti-slip function is provided, comprising: a spring seat, a compression spring fixed to the right periphery of the spring seat, a push ring engaged and fixed to the right side of the compression spring, a moving ring assembled to the right side of the push ring, a stationary ring slidably fitted to the right side of the moving ring, a pressure cap engaged and fixed to the outer right end of the stationary ring, a plurality of arc-shaped clamping heads arranged in an annular array on the outer side of the stationary ring, each arc-shaped clamping head having its opposite end embedded in and slidingly engaged with the inner wall of the stationary ring, a return spring assembly fixedly connected to the opposite side of each arc-shaped clamping head, a pad fixedly connected to the opposite side of each return spring assembly, the outer side of each pad fixedly connected to the stationary ring, and a plurality of slots arranged in an annular array on the right inner side of the pressure cap, with the arc-shaped clamping heads on opposite sides... One end of each ring extends into the corresponding slot and is fitted and fixed with the pressure cap. The left side of the rotating ring has several positioning holes in an annular array. Each positioning hole is fitted with an anti-rotation plug. The left end of each anti-rotation plug is fixedly connected to the push ring. The embedded anti-rotation plugs in the annular array, together with the positioning holes, perform axial multiple fitting and limiting of the push ring and the rotating ring, improving the tightness of the connection between the two and avoiding relative rotation slippage during long-term operation, thus ensuring stable sealing. In addition, several arc-shaped clamps are set in an annular array on the outside of the stationary ring to fit into the slot and the pressure cap. At the same time, a return spring assembly is used to allow it to be freely inserted and removed under axial pressure. After installation, the rotation of the two can be limited, avoiding friction slippage and improving the overall sealing strength.

[0006] According to the aforementioned mechanical seal with anti-slip function, a widened flat washer is fixedly connected to the inner side of the rotating ring, and a rubber O-ring is fixedly connected to the outer right side of the stationary ring. This improves the overall mechanical seal strength.

[0007] According to the aforementioned mechanical seal with anti-slip function, the left and right sides of the arc-shaped clamp are designed with semi-circular arc surfaces, and the front and rear sides of the arc-shaped clamp are designed with vertical planes. This allows it to limit the relative rotation of the stationary ring installed in the pressure cap without affecting the linear insertion and docking of the stationary ring and the pressure cap in the left and right directions.

[0008] According to the aforementioned mechanical seal with anti-slip function, a semi-circular gasket is fixedly connected to the right end of each anti-rotation plug. The semi-circular gasket is made of elastic rubber. This allows for elastic contact positioning when the push ring and moving ring mate, preventing minor wear caused by collisions.

[0009] According to the aforementioned mechanical seal with anti-slip function, the upper arc surface of the arc-shaped chuck is covered with a layer of slip film. The slip film, combined with the arc surfaces on both sides, allows it to smoothly retract when subjected to linear force in the left-right direction, avoiding obstruction.

[0010] According to the aforementioned anti-slip mechanical seal, rubber pads are fixedly attached to both the front and rear sides of the arc-shaped clamp. Under the relative reverse torsional force generated by the rotating ring and the stationary ring, the front and rear sides of the arc-shaped clamp make elastic buffer contact with the gland, avoiding hard compression.

[0011] The above-mentioned solution has the following beneficial effects:

[0012] In this invention, an embedded anti-rotation plug arranged in a ring array, along with several positioning holes, performs axial multiple engagement and limiting of the push ring and the moving ring, improving the tightness of the connection between the two and preventing relative rotational slippage during long-term operation, thus ensuring stable sealing. In addition, several arc-shaped clips are arranged in a ring array on the outer side of the stationary ring, which engage with the clip groove and the pressure cap. At the same time, a set of return springs is used to allow it to be freely inserted and removed under axial pressure, thereby limiting the rotation of the two after installation, avoiding frictional slippage and improving the overall sealing strength.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is an overall schematic diagram of a mechanical seal with anti-slip function according to the present invention;

[0016] Figure 2 This is a schematic diagram of the connection structure of the dynamic ring in a mechanical seal with anti-slip function according to this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure of the stationary ring in a mechanical seal with anti-slip function according to this utility model;

[0018] Figure 4 This is a schematic diagram of the installation of the arc-shaped clamp head in a mechanical seal with anti-slip function according to this utility model.

[0019] Legend:

[0020] 1. Spring seat; 2. Compression spring; 3. Push ring; 4. Moving ring; 5. Stationary ring; 6. Pressure cap; 7. Arc-shaped clamp; 8. Return spring assembly; 9. Pad; 10. Slot; 11. Positioning socket; 12. Anti-rotation plug; 13. Widened flat washer; 14. Rubber O-ring; 15. Sliding diaphragm; 16. Rubber pad. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4 This utility model embodiment provides a mechanical seal with anti-slip function, including: a spring seat 1, a compression spring 2 fixed to the outer right side of the spring seat 1, a push ring 3 engaged and fixed to the right side of the compression spring 2, a moving ring 4 assembled to the right side of the push ring 3, a stationary ring 5 slidably attached to the right side of the moving ring 4, a widened flat washer 13 fixedly connected to the inner side of the moving ring 4, a rubber O-ring 14 fixedly connected to the outer right side of the stationary ring 5, and a pressure cap 6 engaged and fixed to the outer right end of the stationary ring 5, providing the basic structure of the mechanical seal and providing a basis for subsequent optimization.

[0023] The outer ring array of the stationary ring 5 is equipped with several arc-shaped clamps 7. The left and right sides of the arc-shaped clamps 7 are semi-circular arc surfaces, and the front and back sides of the arc-shaped clamps 7 are vertical planes. Rubber pads 16 are fixedly attached to the front and back sides of the arc-shaped clamps 7. A layer of sliding film 15 is covered on the upper arc surface of each arc-shaped clamp 7. The opposite ends of each arc-shaped clamp 7 are embedded in the inner wall of the stationary ring 5 and slide against it. A return spring assembly 8 is fixedly connected to the opposite side of each arc-shaped clamp 7. A return spring assembly 8 is fixedly connected to the opposite side of each return spring assembly 8. The outer sides of the gasket 9 are fixedly connected to the stationary ring 5. The inner right side of the pressure cover 6 has several slots 10 arranged in a ring array. The opposite ends of the arc-shaped clamps 7 extend into the slots 10 and are fitted and fixed to the pressure cover 6. Several arc-shaped clamps 7 are arranged in a ring array on the outer side of the stationary ring 5 to engage with the slots 10 and fit into the pressure cover 6. Simultaneously, a return spring assembly 8 allows for axial compression and retraction, enabling free insertion and removal. After insertion, it limits rotation between the two components, preventing friction and slippage, and improving overall sealing strength.

[0024] The left side of the rotating ring 4 has several positioning holes 11 arranged in an annular array. Each positioning hole 11 is fitted with an anti-rotation plug 12. The left end of each anti-rotation plug 12 is fixedly connected to the push ring 3, and the right end of each anti-rotation plug 12 is fixedly connected to a semi-circular pad. The semi-circular pad is made of elastic rubber, which makes the push ring 3 and the rotating ring 4 axially fit and limit each other, improves the tightness of the connection between the two, avoids relative rotation and slippage during long-term operation, and ensures stable sealing.

[0025] Working principle: In this utility model, the embedded anti-rotation plug 12 arranged in a ring array, together with several positioning holes 11, performs axial multiple fitting and limiting of the push ring 3 and the moving ring 4, which improves the tightness of the connection between the two and avoids relative rotation and slippage during long-term operation, ensuring stable sealing. In addition, several arc-shaped clips 7 are arranged in a ring array on the outside of the stationary ring 5, which fit into the clip groove 10 and the pressure cover 6. At the same time, the return spring group 8 is used to allow it to be freely inserted and unloaded under axial pressure. After installation, the rotation of the two can be limited, avoiding friction and slippage problems and improving the overall sealing strength.

[0026] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A mechanical seal with anti-slip function, comprising: A spring seat (1) is characterized in that a compression spring (2) is fixed to the outer right side of the spring seat (1), a push ring (3) is engaged and fixed to the right side of the compression spring (2), a moving ring (4) is assembled to the right side of the push ring (3), a stationary ring (5) is slidably attached to the right side of the moving ring (4), a pressure cap (6) is engaged and fixed to the outer right end of the stationary ring (5), and a plurality of arc-shaped clips (7) are arranged in an annular array on the outer side of the stationary ring (5). The opposite ends of the arc-shaped clips (7) are all embedded in the inner wall of the stationary ring (5) and slidably engaged with it. The opposite sides of the arc-shaped clips (7) are all fixedly connected to There is a return spring assembly (8), and a pad (9) is fixedly connected to the opposite side of the return spring assembly (8). The outer side of the pad (9) is fixedly connected to the stationary ring (5). The inner right side of the pressure cover (6) has several slots (10) in an annular array. The opposite end of the arc-shaped clip (7) is inserted into the slot (10) and fitted and fixed to the pressure cover (6). The left side of the moving ring (4) has several positioning holes (11) in an annular array. An anti-rotation plug (12) is fitted into each positioning hole (11). The left end of the anti-rotation plug (12) is fixedly connected to the push ring (3).

2. A mechanical seal with anti-slip function according to claim 1, characterized in that, A widened flat washer (13) is fixedly connected to the inner side of the moving ring (4), and a rubber O-ring washer (14) is fixedly connected to the right side of the outer side of the stationary ring (5).

3. A mechanical seal with anti-slip function according to claim 1, characterized in that, The left and right sides of the arc-shaped card head (7) are designed as semi-circular arc surfaces, and the front and rear sides of the arc-shaped card head (7) are designed as vertical planes.

4. A mechanical seal with anti-slip function according to claim 1, characterized in that, The right end of each anti-rotation plug (12) is fixedly connected with a semi-circular pad, which is made of elastic rubber.

5. A mechanical seal with anti-slip function according to claim 1, characterized in that, The upper arc surface of the arc-shaped card head (7) is covered with a layer of slip film (15).

6. A mechanical seal with anti-slip function according to claim 1, characterized in that, The front and rear sides of the arc-shaped clip (7) are both fitted with adhesive pads (16).

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