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Method for sealing protective shaft sleeve of propeller pump

A technology for protecting shaft sleeves and axial flow pumps, which is applied to the components, pumps, and pump components of pumping devices for elastic fluids, can solve the problems of easy falling off of impellers, increased production costs of devices, and weak corrosion resistance, etc. Achieve the effect of improving fixing strength, reducing maintenance time and reducing production cost

Inactive Publication Date: 2009-06-03
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shaft material of the concentrated axial flow pump is 316L, which has weak corrosion resistance; the material of the shaft protection sleeve is CD4Mcu, and there is only one fixing screw in the shaft protection sleeve, so the fixing strength is poor; the water retaining ring and the impeller are directly set on the bearing , so that the medium easily enters the bearing box through its gap; the seal of the shaft sleeve is easily damaged during use, causing the shaft to be corroded, the seal of the entire pump is damaged, acid enters the bearing box, and the bearing is damaged, so that the pump cannot run. Replacing the bearings will lead to a large amount of maintenance and high maintenance costs of the pump, which will increase the production cost of the device and reduce the operating rate of the axial flow pump
In addition, the back cap of the impeller adopts anti-rotation thread, which is opposite to the rotation direction of the pump, and the impeller is easy to fall off during operation.
The length of the existing water retaining ring makes the gap adjustment margin limited. When adjusting the gap, the temperature of the bearing will rise and easily cause the bearing to be burned, thus affecting the safety of the bearing.
The above factors have seriously affected the system availability

Method used

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  • Method for sealing protective shaft sleeve of propeller pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for sealing an axial-flow pump bushing, comprising:

[0016] A rubber seal ring A3 is set between the water retaining ring 1 and the bearing 2 , and a rubber seal ring B5 is set between the impeller 4 and the bearing 3 .

Embodiment 2

[0018] A method for sealing an axial-flow pump bushing, comprising:

[0019] A rubber seal ring A3 is set between the water retaining ring 1 and the bearing 2 , and a rubber seal ring B5 is set between the impeller 4 and the bearing 3 .

[0020] The shaft sleeve fixing screw A6, the shaft sleeve fixing screw B7, the shaft sleeve fixing screw C8, and the shaft sleeve fixing screw D9 are evenly distributed on the circumference; the fixing strength is improved.

Embodiment 3

[0022] A method for sealing an axial-flow pump bushing, comprising:

[0023] A rubber seal ring A3 is set between the water retaining ring 1 and the bearing 2 , and a rubber seal ring B5 is set between the impeller 4 and the bearing 3 . The shaft sleeve fixing screw A6, the shaft sleeve fixing screw B7, the shaft sleeve fixing screw C8, and the shaft sleeve fixing screw D9 are evenly distributed on the circumference.

[0024] The impeller back cap 10 adopts positive screw thread. The direction of rotation is the same as that of the pump, and the impeller turns tighter and tighter during the operation of the pump, and the impeller will not fall off.

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Abstract

The invention discloses a method for sealing a protective shaft sleeve of a propeller pump and is characterized in that a rubber sealing ring A (3) is arranged between a water blocking ring (1) and a bearing (2) and a rubber sealing ring B (5) is arranged between an impeller (4) and a bearing (3). A shaft sleeve fixing bolt A (6), a shaft sleeve fixing bolt B (7), a shaft sleeve fixing bolt C (8) and a shaft sleeve fixing bolt D (9) are uniformly distributed on a circumference. An impeller back nut (10) adopts a positive rotation thread. The length of the water blocking ring is increased by 2 mm. The material of the bearings adopts 904L. The invention can improve the operation rate of the propeller pump and save the repair cost.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a sealing method. Background technique [0002] As we all know, the axial flow pump is one of the important equipment of the wet phosphoric acid concentration process-concentration system. The shaft material of the concentrated axial flow pump is 316L, which has weak corrosion resistance; the material of the shaft protection sleeve is CD4Mcu, and there is only one fixing screw in the shaft protection sleeve, so the fixing strength is poor; the water retaining ring and the impeller are directly set on the bearing , so that the medium easily enters the bearing box through its gap; the seal of the shaft sleeve is easily damaged during use, causing the shaft to be corroded, the seal of the entire pump is damaged, acid enters the bearing box, and the bearing is damaged, so that the pump cannot run. Replacing the bearings will lead to a large amount of maintenance and high maintenanc...

Claims

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Application Information

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IPC IPC(8): F04D29/10F04D29/04
Inventor 黄进杨毅张涛吴斌季国祥彭璟杨启尧胡波胡元强赵枫
Owner WENGFU (GRP) CO LTD