Mechanical sealing device for pump

Abstract

The utility model discloses a mechanical sealing device for a pump, which comprises a fixed shaft, a static ring is sleeved on one side of the fixed shaft, a static ring sealing ring is sleeved on the static ring, a movable ring and a push ring are arranged in the lateral direction of the static ring, and the movable ring and the push ring form a ring shape and are sleeved on a shaft rod of the fixed shaft. The inner side of the movable ring and the inner side of the push ring are provided with movable ring sealing rings, the movable ring sealing rings are arranged on a shaft rod of the fixed shaft in a sleeved mode, the outer ends of the static ring and the movable ring are sleeved with glands, when the static ring sealing rings, the movable ring sealing rings and the fixed shaft form a sealing structure, and when the fixed shaft rotates, the sealing rings generate heat through friction, and the sealing rings are sealed. Due to the fact that the first heat dissipation hole is communicated with the static ring sealing ring, and the second heat dissipation hole is communicated with the moving ring sealing ring, heat transfer and heat dissipation are conducted through the first heat dissipation hole and the second heat dissipation hole, the locking spring pushes the locking block to lock the locking groove, and the sealing and locking effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, and specifically relates to a mechanical sealing device for a pump. Background Art

[0002] In the relevant technology, mechanical seals are one of the basic mechanical components with precision and relatively complex structure. They are key components of various pumps, reaction synthesis kettles, turbine compressors, submersible motors and other equipment. Mechanical seals should be selected according to different working conditions and medium properties, and different structural types and materials should be selected according to different uses.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] Since a certain amount of heat is generated inside the mechanical seal of a pump due to friction, if the heat cannot be discharged for a long time, it is easy to cause the sealing ring of the seal to fail, and the sealing effect is greatly reduced. Utility Model Content

[0005] The purpose of the utility model is to provide a mechanical sealing device for a pump to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical sealing device for a pump, comprising a fixed shaft, a static ring is sleeved on one side of the fixed shaft, a static ring sealing ring is sleeved on the static ring, a dynamic ring and a push ring are arranged on the side of the static ring, the dynamic ring and the push ring form a ring shape, and are sleeved on the shaft rod of the fixed shaft; a dynamic ring sealing ring is arranged on the inner side of the dynamic ring and the push ring, the dynamic ring sealing ring is sleeved on the shaft rod of the fixed shaft, the outer ends of the static ring and the dynamic ring are sleeved with a pressure cover, and the pressure cover is penetrated by a first heat dissipation hole and a second heat dissipation hole; the first heat dissipation hole is connected with the static ring sealing ring, and the second heat dissipation hole is connected with the dynamic ring sealing ring, a spring is fixed on the dynamic ring, and the position of the spring and the fixed shaft is relatively fixed.

[0007] Preferably, a shaft sleeve is provided at the inner end of the other end of the fixed shaft, and a shaft sleeve sealing ring is provided on the inner side of the shaft sleeve.

[0008] Preferably, a threaded fixing hole is provided on the gland, and the threaded fixing hole is communicated with the moving ring.

[0009] Preferably, a mounting groove is provided on the inner side of the gland, a locking spring is provided in the mounting groove, a locking block is provided at the end of the locking spring, and the locking block abuts against the fixed shaft.

[0010] Preferably, a locking groove corresponding to the locking block is provided on the fixed shaft, and the shape of the locking groove matches that of the locking block.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: when the static ring seal and the dynamic ring seal form a sealing structure with the fixed shaft, when the fixed shaft rotates, the dynamic ring seal or the static ring seal generates heat by friction. Since the first heat dissipation hole is connected to the static ring seal and the second heat dissipation hole is connected to the dynamic ring seal, heat is transferred and dissipated through the first heat dissipation hole and the second heat dissipation hole. The locking spring pushes the locking block to lock the locking groove, thereby increasing the sealing and locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 A magnified schematic diagram of center A.

[0014] In the figure: 1. fixed shaft; 2. static ring; 3. static ring sealing ring; 4. dynamic ring; 5. push ring; 6. dynamic ring sealing ring; 7. pressure cover; 8. first heat dissipation hole; 9. second heat dissipation hole; 10. spring; 11. shaft sleeve; 12. shaft sleeve sealing ring; 13. threaded fixing hole; 14. mounting groove; 15. locking spring; 16. locking block; 17. locking groove. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-2The utility model provides a technical solution: a mechanical seal device for a pump, comprising a fixed shaft 1, a stationary ring 2 is sleeved on one side of the fixed shaft 1, a stationary ring sealing ring 3 is sleeved on the stationary ring 2, a dynamic ring 4 and a push ring 5 are sleeved on the side of the stationary ring 2, the dynamic ring 4 and the push ring 5 form a ring and are sleeved on the shaft rod of the fixed shaft 1; a dynamic ring sealing ring 6 is sleeved on the inner side of the dynamic ring 4 and the push ring 5, and the dynamic ring sealing ring 6 is sleeved on the shaft rod of the fixed shaft 1, and a pressure cover 7 is sleeved on the outer end of the stationary ring 2 and the dynamic ring 4, and the pressure cover 7 is penetrated by a first heat dissipation hole 8 and a second heat dissipation hole 9; the first heat dissipation hole 8 and the stationary ring sealing ring The second heat dissipation hole 9 is connected with the dynamic ring sealing ring 6. A spring 10 is fixed on the dynamic ring 4. The position of the spring 10 and the fixed shaft 1 is relatively fixed. When the mechanical seal is working, the axial force caused by the pressure of the sealing fluid and the elastic force of the elastic element makes the dynamic ring and the static ring fit each other and move relative to each other. Due to the close fit of the two sealing end faces, a tiny gap is formed on the sealing interface between the sealing end faces. When the pressurized medium passes through this gap, an extremely thin liquid film is formed to generate resistance to prevent the leakage of the medium. At the same time, the liquid film lubricates the end faces to obtain a long-term sealing effect.

[0017] Specifically, a shaft sleeve 11 is provided at the inner end of the other end of the fixed shaft 1 , and a shaft sleeve sealing ring 12 is provided at the inner side of the shaft sleeve 11 .

[0018] Specifically, the gland 7 is provided with a threaded fixing hole 13 , and the threaded fixing hole 13 is communicated with the dynamic ring 4 .

[0019] Specifically, a mounting groove 14 is provided on the inner side of the pressure cover 7 , a locking spring 15 is provided in the mounting groove 14 , a locking block 16 is provided at the end of the locking spring 15 , and the locking block 16 abuts against the fixed shaft 1 .

[0020] Specifically, a locking groove 17 corresponding to the locking block 16 is provided on the fixed shaft 1 , and the shape of the locking groove 17 is consistent with that of the locking block 16 .

[0021] Working principle: When the utility model is working, when the static ring seal 3 and the dynamic ring seal 6 form a sealing structure with the fixed shaft 1, when the fixed shaft 1 rotates, the dynamic ring seal 6 or the static ring seal 3 generates heat by friction. Since the first heat dissipation hole 8 is connected with the static ring seal 3, and the second heat dissipation hole 9 is connected with the dynamic ring seal 6, heat transfer and heat dissipation are carried out through the first heat dissipation hole 8 and the second heat dissipation hole 9. The locking spring 15 pushes the locking block 16 to lock the locking groove 17, thereby increasing the sealing and locking effect.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal device for a pump, characterized in that: It comprises a fixed shaft (1), a stationary ring (2) is sleeved on one side of the fixed shaft (1), a stationary ring sealing ring (3) is sleeved on the stationary ring (2), a dynamic ring (4) and a push ring (5) are sleeved on the side of the stationary ring (2), the dynamic ring (4) and the push ring (5) form a ring shape and are sleeved on the shaft of the fixed shaft (1); A dynamic ring seal (6) is provided on the inner side of the dynamic ring (4) and the push ring (5), and the dynamic ring seal (6) is sleeved on the shaft of the fixed shaft (1). A pressure cover (7) is sleeved on the outer ends of the static ring (2) and the dynamic ring (4), and the pressure cover (7) is penetrated by a first heat dissipation hole (8) and a second heat dissipation hole (9); The first heat dissipation hole (8) is connected to the static ring sealing ring (3), the second heat dissipation hole (9) is connected to the dynamic ring sealing ring (6), a spring (10) is fixed on the dynamic ring (4), and the position of the spring (10) and the fixed shaft (1) are relatively fixed.

2. A mechanical seal device for a pump according to claim 1, characterized in that: A shaft sleeve (11) is provided at the inner end of the other end of the fixed shaft (1), and a shaft sleeve sealing ring (12) is provided on the inner side of the shaft sleeve (11).

3. A mechanical seal device for a pump according to claim 1, characterized in that: The pressure cover (7) is provided with a threaded fixing hole (13), and the threaded fixing hole (13) is connected to the moving ring (4).

4. A mechanical seal device for a pump according to claim 1, characterized in that: The inner side of the pressure cover (7) is provided with a mounting groove (14), a locking spring (15) is provided in the mounting groove (14), and a locking block (16) is provided at the end of the locking spring (15), and the locking block (16) abuts against the fixed shaft (1).

5. A mechanical seal device for a pump according to claim 4, characterized in that: The fixed shaft (1) is provided with a locking groove (17) corresponding to the locking block (16), and the shape of the locking groove (17) matches that of the locking block (16).

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