Mechanical seal water cooling cavity structure

Abstract

The utility model discloses a mechanical seal water -cooling cavity structure, including main shaft, mechanical seal, first cover and pump body, the first cover seal cover is located on the pump body, the main shaft passes through first cover and extends into the pump body, and the corresponding mechanical seal is arranged on the first cover, and is sealed with the main shaft cooperation, its characterized in that: the first cover is equipped with the bushing in the arrangement, and the bushing is sealed and fixed on the first cover, and the water -cooling cavity is formed between the bushing and the first cover, and the corresponding first cover is equipped with the water inlet connector and the backwater connector that communicate water -cooling cavity, the bushing has the section close to the main shaft, and forms the mechanical seal cavity with the main shaft, and the inner hole of this section bushing and the main shaft leave the operation clearance, and the corresponding water -cooling cavity is equipped with a plurality of fin plates. The utility model discloses simple processing, convenient to use, can satisfy the cooling capacity of mechanical seal cavity under high temperature medium condition well, makes the pump can be more long -term safe stable operation, is especially suitable for conveying high temperature medium's pump use.

Description

Technical Field

[0001] This utility model relates to an improved invention of mechanical seals, and more particularly to an improved invention of a water-cooled cavity structure for a mechanical seal. Background Technology

[0002] When a pump is conveying a high-temperature medium, the medium temperature is transferred to the mechanical seal, significantly reducing the lifespan of the seal components. High temperatures also affect the structural design of the mechanical seal, increasing its design and manufacturing costs. Furthermore, to meet the requirements of high-temperature media, an additional mechanical seal flushing system is often configured to reduce the temperature of the mechanical seal cavity, further increasing the pump's cost. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a mechanically sealed water-cooled cavity structure.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: The mechanical seal water-cooling cavity structure includes a main shaft, a mechanical seal, a first cover, and a pump body. The first cover is sealed on the pump body, and the main shaft extends into the pump body through the first cover. The corresponding mechanical seal is installed on the first cover and seals with the main shaft. The first cover is characterized by having a bushing inside, which is sealed and fixed to the first cover, forming a water-cooling cavity between the bushing and the first cover. The first cover has an inlet connector and an outlet connector communicating with the water-cooling cavity. The bushing has a section close to the main shaft, forming a mechanical seal cavity with the main shaft. A running clearance is left between the inner hole of this bushing section and the main shaft. The water-cooling cavity contains several finned plates.

[0005] The first cover is fixed to the pump body by double-ended studs and nuts, and a first O-ring seal is provided between the first cover and the pump body.

[0006] One end of the bushing is fixed to the head cover by screws, and a second O-ring is provided between the other end of the bushing and the head cover.

[0007] The pump body is provided with a housing inlet ring, which is engaged with the main shaft.

[0008] The mechanical seal includes an internal bushing that rotates synchronously with the main shaft.

[0009] The beneficial effect of this utility model is the improved mechanical seal water-cooling cavity structure.

[0010] 1. The structure has high reliability: After the water-cooling cavity is sealed, the circulating cooling water can stably absorb heat, effectively preventing the temperature of the mechanical seal cavity from becoming too high;

[0011] 2. The structure is simple in design: easy to install, reliable in operation, requires no daily maintenance, has low manufacturing cost, and is suitable for large-scale applications;

[0012] 3. This structure has a strong cooling effect: cooling water enters from the bottom and flows through the water-cooled cavity to remove heat; the finned structure of the first cover bushing increases the heat exchange area, enhances the cooling effect, and ensures the temperature stability of the mechanical seal cavity;

[0013] 4. The structure has high versatility: when the medium temperature is not high, the water cooling cavity does not need to be filled with water, reducing energy consumption; that is, regardless of whether the medium is high temperature, this structure can be used for modular design.

[0014] 5. This structure has a wide range of applications: After the pump is running normally, the water cooling chamber continues to work, so that the temperature of the mechanical seal chamber drops to a suitable temperature, extending the service life of the mechanical seal. This structure can be used for pumps with high medium temperature to meet the usage requirements. Attached Figure Description

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a structural diagram of the bushing of this utility model. Detailed Implementation

[0018] The accompanying drawings illustrate the structure of this utility model, and further details will be described below with reference to the drawings. In this embodiment, see the attached drawings. Figure 1-2 The mechanical seal 2 and water-cooled cavity 11 structure includes a main shaft 1, a mechanical seal 2, a first cover 5, and a pump body 6. The first cover 5 is sealed on the pump body 6, and the main shaft 1 extends into the pump body 6 through the first cover 5. The mechanical seal 2 is correspondingly set on the first cover 5 and seals with the main shaft 1. A bushing 8 is provided inside the first cover 5, and the bushing 8 is sealed and fixed on the first cover 5. A water-cooled cavity 11 is formed between the bushing 8 and the first cover 5. The first cover 5 is provided with an inlet connector 10 and an outlet connector 4 that connect to the water-cooled cavity 11. The bushing 8 has a section close to the main shaft 1, which forms a mechanical seal cavity 13 with the main shaft 1, preferably the front section. The inner hole of this section of the bushing 8 has an operating clearance between it and the main shaft 1 so as not to affect the rotation of the main shaft 1. The water-cooled cavity 11 is provided with several finned plates 12. The finned plates 12 are used to increase the cooling area of ​​the water-cooled cavity 11 and improve the cooling effect.

[0019] In use, the water inlet connector 10 is connected to the cooling water inlet pipe, and the water return connector 4 is connected to the cooling water return pipe. When the pump is running normally, the cooling water will continuously cool the water-cooled chamber 11, and the water-cooled chamber 11 will cool the mechanical seal chamber 13 to ensure that the mechanical seal 2 will not be affected by the high temperature of the medium.

[0020] As a further improved specific implementation, the first cover 5 is fixed to the pump body 6 by double-ended studs and nuts, and a first O-ring seal 3 is provided between the first cover 5 and the pump body 6. The first O-ring seal 3 is pressed between the first cover 5 and the pump body 6 to play a sealing role.

[0021] As a further improved embodiment, one end of the bushing 8 is fixed to the first cover 5 by screws, and a second O-ring seal 7 is provided between the other end of the bushing 8 and the first cover 5. Specifically, the bushing 8 has a T-shaped longitudinal section and is inserted into the front end of the first cover 5. The horizontal surface of one end of the bushing 8 is matched with the front end of the first cover 5 and fixed with screws. The other end of the bushing 8 is matched with the rear end of the first cover 5 by a stepped surface. The second O-ring seal 7 is pressed against the stepped surface to achieve a sealing function.

[0022] As a further improved specific implementation, the pump body 6 is provided with a housing port ring 9, which cooperates with the main shaft 1. The main shaft 1 passes through the housing port ring 9, and the housing port ring 9 plays a supporting and sealing role.

[0023] As a further improved embodiment, the mechanical seal 2 includes an internal bushing that rotates synchronously with the main shaft 1. The mechanical seal 2 is existing technology, and its specific structure will not be described in detail.

[0024] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A mechanical seal water-cooled cavity structure, comprising a main shaft, a mechanical seal, a first cover, and a pump body, wherein the first cover is sealed on the pump body, the main shaft extends into the pump body through the first cover, and a corresponding mechanical seal is disposed on the first cover and seals with the main shaft, characterized in that: The first cover is equipped with a bushing, which is sealed and fixed to the first cover. A water-cooling cavity is formed between the bushing and the first cover. The first cover is provided with an inlet connector and an outlet connector that connect to the water-cooling cavity. The bushing has a section close to the main shaft and forms a mechanical sealing cavity with the main shaft. The inner hole of this section of the bushing has a running clearance between it and the main shaft. The water-cooling cavity is provided with several finned plates.

2. The mechanical seal water-cooled cavity structure as described in claim 1, characterized in that: The first cover is fixed to the pump body by double-ended studs and nuts, and a first O-ring seal is provided between the first cover and the pump body.

3. The mechanical seal water-cooled cavity structure as described in claim 1, characterized in that: One end of the bushing is fixed to the head cover by screws, and a second O-ring is provided between the other end of the bushing and the head cover.

4. The mechanical seal water-cooled cavity structure as described in claim 1, characterized in that: The pump body is provided with a housing inlet ring, which is engaged with the main shaft.

5. The mechanical seal water-cooled cavity structure as described in claim 1, characterized in that: The mechanical seal includes an internal bushing that rotates synchronously with the main shaft.

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