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Principal axis sealing device for submersible pump

A spindle seal and submerged pump technology, which is applied to parts, pumps, and pump components of pumping devices for elastic fluids, can solve the problems of complex mechanical seal structure, low machining precision, and poor sealing effect, and achieve Avoid lubricating fluid from polluting the conveyed medium, which is conducive to safe transportation and ensures safety.

Inactive Publication Date: 2010-06-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Packing seal, as a traditional pump sealing form, is widely used because of its simple structure, convenient maintenance and replacement, and low price; but this kind of seal has the defects of short service life and poor sealing effect, and it is difficult to adapt to the current no Spill Management Needs
However, the mechanical seal has complex structure, high processing precision, poor vibration resistance and cushioning performance, which often lead to mechanical seal failure.
In practical applications, due to the low precision of machining, the effect of simply using mechanical seals is not good

Method used

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  • Principal axis sealing device for submersible pump
  • Principal axis sealing device for submersible pump
  • Principal axis sealing device for submersible pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, Figure 1 ~ Figure 2 In combination, a main shaft sealing device for a submerged pump is given, including a shaft sleeve I8, a shaft sleeve II10, and a mechanical seal seat 4. The mechanical seal seat 4 is a seat with a cavity inside.

[0017] The shaft sleeve II10 is located directly below the shaft sleeve I8, and the entire shaft sleeve I8 and the upper section of the shaft sleeve II10 are set in the mechanical seal seat 4. The cofferdam 1 is a barrel body enclosed by the bottom surface and the side surface. The mechanical seal seat 4 is set in the cofferdam 1. The lower section of the shaft sleeve II10 passes through the bottom of the mechanical seal seat 4 and the bottom surface of the cofferdam 1 in turn.

[0018] A mechanical seal assembly 9 is provided between the inner surface of the mechanical seal seat 4 and the outer surface of the shaft sleeve I8. This mechanical seal assembly 9 can be selected from a BURGMANN M7N type mechanical seal; the mech...

Embodiment 2

[0028] Embodiment 2. A main shaft sealing device for a submerged pump. The primary skeleton sealing ring 15 in Embodiment 1 is changed to a mechanical seal 16, and the mechanical seal 16 is also a BURGMANN M7N mechanical seal; the rest Structure is all with embodiment 1. In this way, the reliability of sealing can be further improved.

[0029] The schematic diagram of the actual use state of the main shaft sealing device of the submerged pump is as follows: Figure 4 shown.

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Abstract

The invention discloses a main shaft sealing device used for a submerged pump, which comprises a shaft housing I (8) sheathed on a shaft shoulder (103), a shaft housing II (10) sheathed on a shaft (104) and a mechanical seal receptacle (4) that is fixedly connected with a bearing block (101) in a sealing way; wherein, the shaft housing I (8) and one part of the shaft housing II (10) are sheathed inside the mechanical seal receptacle (4), a mechanical seal component (9) is arranged between the mechanical seal receptacle (4) and the shaft housing I (8), and a lubricating oil side framework sealing ring (13) is arranged between the mechanical seal receptacle (4) and the shaft housing II (10); a cofferdam (1) which is internally provided with a cavity is sheathed outside the mechanical seal receptacle (4), and is fixedly connected with the bearing block (101) in a sealing way; the other part of the shaft housing II (10) passes through the cofferdam (1), and at least one framework sealing ring is arranged between the cofferdam (1) and the shaft housing II (10). The main shaft sealing device can improve the reliability of sealing.

Description

technical field [0001] The invention relates to a main shaft sealing device for a submerged pump, which is suitable for the main shaft sealing of submerged pumps that need to transport chemical liquid media in various industries such as petroleum, chemical industry, shipbuilding and papermaking. Background technique [0002] Industries such as petrochemical and papermaking use storage tanks to store chemicals in large quantities; in the process of maritime transportation, large chemical transport cargo ships often use multiple large-depth and large-volume cargo holds to store dangerous chemicals. When the above-mentioned chemicals enter and leave the storage tank or cargo hold, chemical pumps are required to realize the transportation of chemicals, and vertical deep well pumps are the most commonly used method to install the storage tank or cargo hold. [0003] At present, the rotary shaft seals of centrifugal pumps mainly include packing seals, mechanical seals and skeleton...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/12F04D29/70
Inventor 武鹏吴大转王乐勤张志雄
Owner ZHEJIANG UNIV