Inspection steps for sealing spring of horizontal stainless

Mechanical seal in the spring parts are very important, usually to pay more attention to check, this paper introduces the horizontal stainless steel oil pump seal spring inspection steps

Spring inspection includes: total number of turns, effective number of turns, free height, whether the axis is vertical to the end face, spring rotation.

But the spring must check the rotation direction, multi spring do not need to check the rotation direction.

New spring to check its original free height, free height to measure, and compare with the original record, residual deformation is too large to replace.

After the old spring is cleaned, its elasticity should be measured. If the elasticity is reduced by 20%, it should be replaced.

Multi-spring mechanical seal, the spring free height difference shall not be less than 0.5mm.

What are the inspection requirements for shaft and shaft sleeve before mechanical seal installation?

Answer: 1) check the matching size of the shaft (or sleeve), surface roughness, chamfering, axial movement momentum and radial runout of the shaft, for the sleeve, to check the matching clearance of the shaft and sleeve.

The surface roughness of the shaft diameter (or sleeve) of the mechanical seal should be below 1.6, and the axial channeling amount of the shaft should not be greater than 0.25mm.

The shaft sleeve shall not be axial to axial channeling, allowing the radial circular runout of the shaft or shaft sleeve.

Inspect shaft and shaft sleeve for wear.

Because of the vibration of the machinery and the floating of the compensation of the moving ring, the shaft and the sleeve may also be worn by the "O" sealing ring. If there is wear and tear, it should be repaired and polished or replaced.

3) The sleeve seat and sleeve should be in good condition.

What are the inspection contents of the sealing end face or sealing box?

Answer: The roughness of the surface in contact with the static ring sealing ring is 1.6. After assembling the static ring, the circular runout of the end face shall not be greater than 0.06mm.

Sealing end face or sealing cavity should be no burr, chamfering radius is too sufficient, to be smooth.

Sealing end face or sealing cavity diameter size should meet the requirements.

What is the "six fixed" content of the pump tour inspection?

Answer: decide route, decide person, time, fixed point, decide responsibility, decide the ground of requirement undertakes inspection.

Chemical machine pump repair general divided into several maintenance forms?

Answer: there are three main forms: 1) maintenance overhaul, 2) unplanned maintenance, 3) planned maintenance.

What should I pay attention to when assembling the auxiliary seal ring?

Answer: 1) the rubber auxiliary sealing ring can not be soaked and washed with gasoline and kerosene to avoid swelling and deformation and premature aging;

2) The "O" sealing ring is installed on the stationary ring assembly. It should be aligned and not distorted. It is on the cross section when the burr is in a free state.

3) When pushing the components, the "O" sealing ring should be prevented from damage.

The main damage forms are: falling block, crack, bruise, curling and twisting.

The author of the article: Botou Oil Pump