Non-plugging sewage pump shaft alignment method

1. The twist of vertical axis method

For pipeline non-clog sewage pump, the scene is the most simple method is to lay a direct axis method, the direct axis, the axis on the hardwood (or pad on the square iron steel sheet), concave down. Then, twisting rod with a hammer knock, make the shaft concave surface of the material by knocking and extension, the shaft alignment. Twist rod used steel commonly, also can use brass rod twisting rod, its bottom end arc need to match the axial surface, aimed at axial surface twist when no damage.

Knock when should pay attention to methods: begin with bending of the largest local, the scope for 1/3 of the circumference of a circle, playing can be drawn on the advance in the shaft well, a third beat the number of times to some more, circular arc center on both sides of the knock the less the number of times. After initial can be faster, slower. In the process of twist to play, to measure the change of shaft bending in time, don't play too hard. Support is soft than twist rod, and the bigger and shaft interface. If this is not the case that supports a hard, and shaft interface and small, that equals the concavo-convex surface twist together play, shaft alignment.

2. The alignment:

Heating straightening method is suitable for the small bending radius, larger diameter, hardness is not less than 35 HRC of carbon steel, alloy steel and stainless steel shaft. Local principle by oxyacetylene flame heating shaft, the heated area due to heat expansion, but around cold area and because of its rigidity and limit its inflation. Therefore, hot extrusion, cooling, hotspots and volume contraction, contract to pull the surrounding area. So was born the reverse bending, to make up for the original bending capacity, so as to achieve the goal of alignment.

Heating straightening method note: heating before, should first will have no blocked sewage pump top loosen clamping shaft parts, for heating, so as not to damage the top after heating axial elongation. When the first heating straightening is not enough, need straightening again, for dot heating or strip heating, should avoid the original heating area, in order to prevent the repeated heating, reduce the microstructure change and shrinkage crack. School after heat treatment in order to prevent new deformation, stress relief, should be the school after heat treatment, heating the oxyacetylene flame nozzle, and the parts diameter determine its size. The heating area including bar, serpentine shape and round dot. Bending amount is larger, the fractional heating straightening, not a long time heating, in order to avoid burning work surface.

Hot straightening is the key to the location and direction of bending must find right, heating flame will and bending in the same direction, can appear otherwise) or more of the bend.