Methods To Improve The Efficiency Of Sanitary Rotary Vane Pumps

Sanitary Rotary Lobe Pump As a special purpose pump body, it has very strict requirements for mechanical seals. Mechanical seals themselves are a kind of high-demand precision parts, and have very high requirements for design, machining, and assembly quality. Only in this way can the normal use of the submersible sewage pump be guaranteed.

The mechanical seal of the sanitary rotary vane pump is also called the end face seal. It has a pair of end faces perpendicular to the axis of rotation. Under the action of fluid pressure and compensating mechanical external elastic force, the end face of the submersible sewage pump relies on the cooperation of the auxiliary seal to keep in contact with the other end and slide relatively, thereby preventing fluid leakage.

There are still unreasonable aspects in the design, selection, and installation of the sanitary rotary vane pump mechanical seal.
(1) The spring compression of the submersible sewage pump must be carried out according to regulations. It is not allowed to be too large or too small. The error is ±2mm. Excessive compression increases the end face pressure ratio, excessive friction heat, causing thermal deformation of the sealing surface of the submersible sewage pump and accelerated end face wear. If the compression is too small, the end face pressure ratio of the dynamic and static rings is insufficient, and it cannot be sealed.
(2) The end face of the shaft (or sleeve) where the dynamic ring seal of the submersible sewage pump is installed and the end face of the sealing cover (or housing) where the static ring seal is installed should be chamfered and polished to avoid damaging the dynamic and static ring seals during assembly.

If there are mechanical problems or reduced efficiency during the operation of the sanitary rotary vane pump, it will have an adverse effect on the production of the entire factory. The wear-resistant ring can provide protection for the pump and control the recycling of liquid when the pump is operating under abnormal operating conditions. Therefore, its performance optimization is very important. Traditional wear-resistant rings are made of metals of different materials, but due to the limitations of the characteristics of metal materials, the further improvement of the overall function of the submersible sewage pump is affected. How to improve the efficiency of the submersible sewage pump has become a key issue at present.

The operating efficiency of a pump mainly depends on the amount of liquid refluxed through the wear-resistant ring; reducing the gap between the wear-resistant rings can reduce the area between the wear-resistant rings for liquid to pass. When using metal wear-resistant rings, it is necessary to maintain a larger gap to reduce the contact of the wear-resistant rings. However, a larger gap will cause liquid reflux, which reduces the efficiency of the pump. At the same time, a larger running clearance will cause the pump to vibrate strongly, causing the casing to shift and causing the wear rings to contact each other.