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Flushing device for mechanical seal of centrifugal pump

A technology of mechanical seals and flushing devices, which is applied to mechanical equipment, parts of pumping devices for elastic fluids, pumps, etc., can solve the problems of mechanical seal residue, accumulation of impurities, and aggravated mechanical seals, so as to improve the sealing effect, The effect of preventing the deposition of particulate impurities and ensuring normal and stable operation

Active Publication Date: 2016-11-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The mechanical seal of the horizontal centrifugal pump disclosed in this patent document has a convective tendency to flush the mechanical seal. The accumulation of impurities will increase the wear of the mechanical seal

Method used

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  • Flushing device for mechanical seal of centrifugal pump
  • Flushing device for mechanical seal of centrifugal pump
  • Flushing device for mechanical seal of centrifugal pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] see figure 1 , a centrifugal pump mechanical seal flushing device, comprising a flushing pipe 1 connected to the centrifugal pump, the liquid inlet end of the flushing pipe 1 is connected to the outlet port 2 of the centrifugal pump, the liquid outlet end of the flushing pipe 1 is connected to the mechanical seal of the centrifugal pump 3 connection, the flushing pipe 1 is connected with a tubular filter 4, a pressure gauge 5 and a throttling orifice 6, the tubular filter 4 is close to the outlet end 2 of the centrifugal pump, and the throttling orifice 6 is close to The mechanical seal 3 of the centrifugal pump, the flushing pipe 1 is provided with a first shut-off valve 7 and a second shut-off valve 8, the first shut-off valve 7 is located between the outlet port 2 of the centrifugal pump and the tubular filter 4, The second stop valve 8 is located between the pressure gauge 5 and the throttle orifice 6 .

[0043] This embodiment is the most basic implementation mode...

Embodiment 2

[0045] see figure 2 , a centrifugal pump mechanical seal flushing device, comprising a flushing pipe 1 connected to the centrifugal pump, the liquid inlet end of the flushing pipe 1 is connected to the outlet port 2 of the centrifugal pump, the liquid outlet end of the flushing pipe 1 is connected to the mechanical seal of the centrifugal pump 3 connection, the flushing pipe 1 is connected with a tubular filter 4, a pressure gauge 5 and a throttling orifice 6, the tubular filter 4 is close to the outlet end 2 of the centrifugal pump, and the throttling orifice 6 is close to The mechanical seal 3 of the centrifugal pump, the flushing pipe 1 is provided with a first shut-off valve 7 and a second shut-off valve 8, the first shut-off valve 7 is located between the outlet port 2 of the centrifugal pump and the tubular filter 4, The second stop valve 8 is located between the pressure gauge 5 and the throttle orifice 6 .

[0046] A suspension separator 9 is also included, one end o...

Embodiment 3

[0050] see image 3 , a centrifugal pump mechanical seal flushing device, comprising a flushing pipe 1 connected to the centrifugal pump, the liquid inlet end of the flushing pipe 1 is connected to the outlet port 2 of the centrifugal pump, the liquid outlet end of the flushing pipe 1 is connected to the mechanical seal of the centrifugal pump 3 connection, the flushing pipe 1 is connected with a tubular filter 4, a pressure gauge 5 and a throttling orifice 6, the tubular filter 4 is close to the outlet end 2 of the centrifugal pump, and the throttling orifice 6 is close to The mechanical seal 3 of the centrifugal pump, the flushing pipe 1 is provided with a first shut-off valve 7 and a second shut-off valve 8, the first shut-off valve 7 is located between the outlet port 2 of the centrifugal pump and the tubular filter 4, The second stop valve 8 is located between the pressure gauge 5 and the throttle orifice 6 .

[0051] A suspension separator 9 is also included, one end of...

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PUM

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Abstract

The invention discloses a flushing device for a mechanical seal of a centrifugal pump, and belongs to the technical field of centrifugal pumps. The flushing device comprises a flushing pipe connected to the centrifugal pump; the liquid feeding end of the flushing pipe is connected with the outlet end of the centrifugal pump; the liquid discharging end of the flushing pipe is connected with the mechanical seal of the centrifugal pump; the flushing device is characterized in that the flushing pipe is connected with a tubular filter, a pressure gauge and a throttling orifice plate; the tubular filter is close to the outlet end of the centrifugal pump; the throttling orifice plate is close to the mechanical seal of the centrifugal pump; a first stop valve and a second stop valve are arranged on the flushing pipe; the first stop valve is positioned between the outlet end of the centrifugal pump and the tubular filter; and the second stop valve is positioned between the pressure gauge and the throttling orifice plate. The flushing device can both achieve a good cooling effect on the mechanical seal and prevent particle impurities from being deposited on the sealing surfaces of movable and fixed rings, thus effectively protecting the sealing surfaces of the movable and fixed rings, relieving wear and enhancing the sealing effect; and therefore, normal and stable operation of the centrifugal pump is guaranteed.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a mechanical seal flushing device for centrifugal pumps. Background technique [0002] A centrifugal pump is a device that uses the centrifugal force generated by the impeller of the rotating pump to drive the rotation of the fluid to complete the fluid delivery. [0003] The basic structure of a centrifugal pump consists of six parts, namely the impeller, pump body, pump shaft, bearings, seal rings and stuffing box. Among them, the impeller is the core part of the centrifugal pump. Its speed is higher than that of the centrifugal pump, and its force is large. The blades on the impeller play a major role. The impeller must pass the static balance test before assembly. The inner and outer surfaces of the impeller are required to be smooth to reduce the frictional loss of water flow. The pump body is also called the pump casing, which is the main body of the water pump....

Claims

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Application Information

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IPC IPC(8): F04D29/58F04D29/70F04D29/10
CPCF04D29/10F04D29/58F04D29/70
Inventor 吴基荣崔吉宏严伟刘钊曹振涛吴小富马东超王希刚陈明辉林胜杨川
Owner CHINA PETROLEUM & CHEM CORP
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