CN201902561U - Mechanical seal ring - Google Patents

Abstract

The utility model relates to a mechanical sealing ring, which includes a moving ring and a static ring in contact, the end face of the static ring is in contact with the end face of the moving ring, and cylindrical micropores are arranged on the end face of the static ring and/or on the end face of the moving ring groove. The depth H of the cylindrical microporous groove is 2-60 microns, and the diameter _2R0 is 20-300 microns. The distance between the cylindrical microporous grooves is 35-1000 microns. The utility model is suitable for the sealing of dynamic equipment in the fields of petroleum, chemical industry, medicine, etc., especially for high-temperature and high-pressure water, volatile media (such as liquid ammonia, olefin, gasoline, etc.), and high-speed liquid-phase turbine pumps. , reliable sealing, long service life, long maintenance cycle, low maintenance cost, convenient processing, effectively improving production efficiency and product yield, while saving labor.

Description

A mechanical seal ring

technical field

The utility model relates to a mechanical sealing ring.

technical background

At present, in petroleum, chemical, pharmaceutical and other industries, ordinary contact mechanical seals are widely used in sealing equipment. When this mechanical seal is in operation, the sealing end faces are in direct contact, and the wear caused by friction is serious, resulting in reduced sealing performance and greatly shortening the sealing time. ring life. At the same time, some sealing devices are difficult to manufacture and cost high.

Utility model content

The technical problem to be solved by the utility model is to provide a mechanical sealing ring with good sealing performance, long service life and convenient processing.

The utility model adopts the following technical solutions:

The utility model includes a moving ring and a static ring in contact, and is characterized in that the end face of the static ring is in contact with the end face of the moving ring, and a cylindrical microporous groove is arranged on the end face of the static ring and/or on the end face of the moving ring.

The depth H of the cylindrical microporous groove is 2-60 microns, and the diameter _2R0 is 20-300 microns.

The distance between the cylindrical microporous grooves is 35-1000 microns.

The moving ring with the end face of the moving ring and the static ring with the end face of the static ring are set outside the rotating shaft, and a pressing device is arranged between the static ring and the moving ring.

The pressing device is composed of a spring arranged between the spring seat and the moving ring.

The spring seat is connected with the rotating shaft by a fastening screw.

The positive effects of the utility model are as follows:

The working principle of the utility model is as follows: when the vehicle is parked, that is, when the moving ring does not rotate, under the action of the spring force, the static ring and the moving ring form a stationary plane seal, so that the fluid medium can be sealed. When the moving ring rotates, because there are many micropores on the surface of the static ring and (or) the moving ring, the rotation of the moving ring makes the surface and the micropores on the surface of the static ring form a convergent fluid film layer, and the dynamic pressure of the fluid film pushes the two The sealing surface, and the fluid film pressure prevents the leakage of the medium and ensures the sealing between the sealing surfaces. Since the friction state between the sealing surfaces is fluid friction, the friction and wear of the sealing surfaces are reduced and the sealing life is prolonged.

The utility model is suitable for the sealing of dynamic equipment in the fields of petroleum, chemical industry, medicine, etc., especially for high-temperature and high-pressure water, volatile media (such as liquid ammonia, olefin, gasoline, etc.), and high-speed liquid-phase turbine pumps. , reliable sealing, long service life, long maintenance cycle and low maintenance cost. Due to the regular cylindrical shape, the processing is convenient, the production efficiency and product yield are effectively improved, and labor is saved at the same time.

Description of drawings

Accompanying drawing 1 is a structural representation of an embodiment of the utility model;

Accompanying drawing 2 is the utility model stationary ring end face to be provided with the schematic diagram of the structure of cylindrical microporous groove;

Accompanying drawing 3 is the magnified partial cross-sectional view of the static ring end face of the utility model;

Accompanying drawing 4 is the partial enlarged view of the static ring end face of the utility model.

In the accompanying drawings: 1 fastening screw, 2 spring seat, 3 spring, 4 moving ring auxiliary sealing ring, 5 moving ring, 6 end cover sealing ring, 7 static ring, 8 static ring auxiliary sealing ring, 9 anti-rotation pin, 10 rotating shaft, 11 end cover, 12 micro-hole groove, 13 moving ring end face, 14 static ring end face.

Detailed ways

As shown in accompanying drawing 1, it is an embodiment of the utility model, which includes fastening screw 1, spring seat 2, spring 3, moving ring auxiliary sealing ring 4, moving ring 5, static ring 7, static ring auxiliary sealing ring 8 and Anti-rotation pin 9 and other main components. The spring seat 2 is fixed on the rotating shaft 10 by the fastening screw 1, the spring 3 is fixed on the spring seat 2, and the thrust of the spring 3 makes the moving ring 5 and the static ring 7 fit closely.

The utility model includes a moving ring 5 and a static ring 7 which are in contact with each other. The end face 14 of the static ring is in contact with the end face 13 of the moving ring. A cylindrical microporous groove 12 is arranged on the end face 14 of the static ring and/or on the end face 13 of the moving ring. . Cylindrical microporous grooves 12 are uniformly distributed, as shown in accompanying drawings 3 and 4, the depth H of cylindrical microporous grooves 12 is in the range of 2-60 microns, the diameter _2R0 is in the range of 20-300 microns, and the micropore spacing is 2R ₁ in the range of 35-1000 microns.

When parking and starting, the rotating shaft 10 drives the moving ring 5 to rotate through the fastening screw 1, the spring seat 2, and the spring 3. The moving ring 5 is under the action of the spring force and the medium pressure, and the moving ring end face 13 is closely connected to the static ring end face 14. Fitting, and relative sliding occurs, preventing the radial leakage of the medium along the end faces, constituting the main seal of the mechanical seal. After the moving ring 5 and the static ring 7 are worn, under the action of the spring 2 and the medium pressure, the two sealing end faces are always in close contact. The auxiliary sealing ring 4 of the moving ring, the sealing ring 6 of the end cover and the auxiliary sealing ring 8 of the static ring form a static seal with related parts to prevent the medium from leaking.

As shown in Figure 2, a cylindrical microporous groove 12 is provided on the end face 14 of the static ring. When the working or moving ring 5 rotates at a high speed, the liquid medium stays in the microporous groove 12 on the end face 14 of the static ring, so that the moving ring The end surface 13 and the cylindrical microporous groove 12 on the static ring end surface 14 form a convergent gap liquid film layer, so that each hole is like a microdynamic sliding bearing, and a liquid film is generated above and around the cylindrical microporous groove 12 The dynamic pressure makes the two sealing surfaces tend to separate. By optimizing the diameter, depth and spacing of micropores, the dynamic pressure of the liquid film can be maximized. At this time, the resultant force of the dynamic pressure of the liquid film can separate the two sealing surfaces, and the dynamic pressure of the liquid film prevents the leakage of the medium. The sealing between the sealing surfaces is guaranteed. Because there is a liquid film between the two sealing surfaces, the two sealing surfaces are no longer in direct contact, and the friction state between the sealing surfaces is fluid friction, thereby reducing the friction and wear of the sealing surfaces and prolonging the service life.

The utility model is suitable for the sealing of dynamic equipment in the fields of petroleum, chemical industry, medicine, etc., especially for high-temperature and high-pressure water, volatile media (such as liquid ammonia, olefin, gasoline, etc.), and high-speed liquid-phase turbine pumps. , reliable sealing, long service life, long maintenance cycle and low maintenance cost. Due to the regular cylindrical shape, the processing is convenient, the production efficiency and product yield are effectively improved, and labor is saved at the same time.

Claims (6)

1. A mechanical seal ring, which includes a moving ring (5) and a static ring (7) in contact, characterized in that the end face of the static ring (14) and the end face of the moving ring (13) are in contact, and the end face of the static ring (14) ) and/or on the moving ring end surface (13) is provided with a cylindrical micro-hole groove (12). 2. A mechanical seal ring according to claim 1, characterized in that the depth H of the cylindrical microporous groove (12) is 2-60 microns, and the diameter 2R ₀ is 20-300 microns. 3. A mechanical seal ring according to claim 1 or 2, characterized in that the distance between the cylindrical microporous grooves (12) is 35-1000 microns. 4. A mechanical seal ring according to claim 3, characterized in that the moving ring (5) with the end face of the moving ring and the static ring (7) with the end face of the static ring are sleeved outside the rotating shaft (10), A pressing device is arranged between the static ring (7) and the dynamic ring (5). 5. A mechanical seal ring according to claim 4, characterized in that the pressing device is composed of a spring (3) arranged between the spring seat (2) and the moving ring (5). 6. A mechanical seal ring according to claim 5, characterized in that the spring seat (2) is connected to the rotating shaft (10) through a fastening screw (1).

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