Civil water pump casing

Assembly of civil water pump casing:
The casing of a civil water pump can be installed in two steps: installing the casing onto the machine base; The second step is to install the assembly consisting of the pump rotor, pump cover, pump body, etc. into the pump casing, and then install the entire machine on the base.
The key to assembling civilian pump casings is to ensure that the impeller is in its normal working position. By relying on the mating surface between the pump cover and the pump body, the coaxiality between the impeller and the sealing ring on the pump body is ensured. The gasket between the pump body and the pump cover has a dual function of sealing and adjusting the axial position of the impeller. When installing, the gasket should be installed first, and then the impeller and pump cover should be pushed into the pump body along the axial direction. The pump cover bolts should be tightened, and the pump shaft should be rotated while tightening. Pay attention to whether the impeller and sealing ring are rubbing against each other. If so, adjust them in a timely manner.
The sealing gasket can be made of materials such as rubber sheet or rubber asbestos sheet. After adjusting the gaps between each part, the pump cover and pump casing can be fastened together with bolts.
In order to assemble the civil water pump casing onto the pump body, the axial sealed parts should be first fitted onto the pump shaft from the front end, and then the center hole of the water pump casing should be passed through the impeller back cap, so that the back of the pump casing contacts the supporting surface of the pump body, and the pump casing should be rotated to make the pump outlet face in the appropriate direction. Afterwards, insert the connecting bolts between the pump casing and the pump body, and tighten these bolts to complete the assembly of the pump casing.
The pump cover is located in front of the pump casing and impeller, and is fitted with a sealing ring at its central hole. The sealing ring is located on the outer side of the impeller inlet end. Because the radial clearance between the sealing ring and the inlet end of the impeller is very small, when assembling the pump cover, the radial clearance between the sealing ring and the inlet end of the impeller should be carefully adjusted to ensure that there is no friction between them. At the same time, when installing the pump cover, a sealing gasket should be added between the contact surface of the pump cover and the pump casing. This can not only prevent the liquid in the pump casing from leaking out from here, but also change the axial clearance between the impeller and the sealing ring by adjusting the thickness of the sealing gasket. Afterwards, place the entire pump on the machine base, tighten the machine base bolts, and fasten the entire pump to the machine base together.