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Cartridge mechanical seal

A mechanical seal, cartridge technology, applied in the direction of engine seals, mechanical equipment, engine components, etc., can solve problems such as the decline of mechanical seal function, affecting the sealing of moving ring 2 and static ring 1, and increasing the temperature of the grinding surface. Ensure the sealing effect, avoid cracking, and improve the effect of the overall sealing effect

Active Publication Date: 2017-08-11
张华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the current mechanical seals use such as figure 1 In the structure shown, the flange 3, the static ring 1, and the moving ring 2 are sequentially set on the mechanical shaft 4, and the friction ring 201 in the moving ring 2 contacts with the static ring 1 to form a grinding surface. If there is no liquid in the grinding surface When entering, the mechanical shaft 4 starts to rotate, which will cause the grinding surface to be in a dry grinding state. Dry grinding can easily increase the temperature of the grinding surface. When the liquid on the left enters the grinding surface due to the rotation of the mechanical shaft 4, the temperature of the liquid is low. Contact with the high-temperature grinding surface will easily lead to sudden cooling and cracking of the grinding surface, which will seriously affect the seal between the moving ring 2 and the static ring 1, and lead to the decline of the function of the entire mechanical seal

Method used

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  • Cartridge mechanical seal
  • Cartridge mechanical seal

Examples

Experimental program
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Effect test

Embodiment approach 1

[0018] This embodiment provides a cartridge mechanical seal, such as figure 2 As shown, the mechanical seal consists of a static ring 1, a moving ring 2, a gland 5 with a water inlet 501 and a water outlet 502, a bearing 7 and a bearing gland 8, wherein the static ring 1, the moving ring 2, the bearing 7 and the bearing pressure The cover 8 is set on the mechanical shaft 4 in turn, the static ring 1 is pressed and fixed with the outer flange 3 set on the mechanical shaft 4, and the gasket 10 is used to seal the two, and the surface between the moving ring 2 and the static ring 1 Contact, the bearing 7 and the moving ring 2 are sealed by the oil seal 9, the bearing 7 and the mechanical shaft 4 are sealed and fixed by the O-ring 11, the gland 5 is set on the periphery of the static ring 1 and the moving ring 2, and the gland 5 and the A sealed cavity 6 is formed between the static ring 1 and the moving ring 2, and one end of the gland 5 is fixed with the flange 3 by a hexagon s...

Embodiment approach 2

[0023] This embodiment is a further improvement of Embodiment 1. The main improvement is that in Embodiment 1, in order to facilitate assembly, a certain gap is generally left between the bearing 7 and the mechanical shaft 4, so that when the mechanical seal is installed outdoors During use, rainwater easily enters the gap between the bearing 7 and the mechanical shaft 4 in rainy days, causing the bearing 7 to get rusty. When the shaft 4 rotates, it cannot drive the bearing 7 to rotate together, and it will cause the O-ring 11 to be damaged by friction, which will affect the overall sealing effect of the mechanical seal; and the mechanical seal in this embodiment is also provided with a pin 13, the pin 13 One end of the split half snap ring 203 is embedded, and the other end clamps the bearing 7. In this way, when the split half snap ring 203 rotates with the mechanical shaft 4, the pin 13 also rotates accordingly, and then drives the bearing 7 to rotate accordingly. The relat...

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Abstract

The invention relates to the field of mechanical seals, and discloses a container packaging type mechanical seal. The seal comprises static rings (1) and movable rings (2) which are sequentially arranged on a mechanical shaft (4) in a sleeving manner; the movable rings (2) and the static rings (1) are in face contact; glands (5) with water inlets (501) and water outlets (502) are arranged on the peripheries of the static rings (1) and the movable rings (2) in a sleeving manner; and a seal cavity (6) is formed among each gland (5), the corresponding movable ring (2) and the corresponding static ring (1). Before the mechanical shaft rotates, the wear faces between the static rings and the movable rings of the mechanical seal can be surrounded by cooling water, and therefore after the mechanical shaft rotates, and when liquid reaches the wear faces, the temperature difference between the wear faces and the liquid is small, and the phenomenon that due to the sudden drop of the temperature, the wear faces crack is effectively avoided; and the seal effect between the static rings and the movable rings is effectively endured, and the whole seal effect of the mechanical seal is improved.

Description

technical field [0001] The invention relates to the field of mechanical seals, in particular to a cartridge type mechanical seal. Background technique [0002] Most of the current mechanical seals use such as figure 1 In the structure shown, the flange 3, the static ring 1, and the moving ring 2 are sequentially set on the mechanical shaft 4, and the friction ring 201 in the moving ring 2 contacts with the static ring 1 to form a grinding surface. If there is no liquid in the grinding surface When entering, the mechanical shaft 4 starts to rotate, which will cause the grinding surface to be in a dry grinding state. Dry grinding can easily increase the temperature of the grinding surface. When the liquid on the left enters the grinding surface due to the rotation of the mechanical shaft 4, the temperature of the liquid is low. Contact with the high-temperature grinding surface will easily lead to sudden cooling and cracking of the grinding surface, which will seriously affec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/34F16J15/36
CPCF16J15/3404F16J15/36
Inventor 张华
Owner 张华