How to measure and adjust the clearance between the impeller and the pump cover of the volute pump?
A vane pump consisting mainly of an impeller, a pump body, and a pump cover. The impeller is a disk, and the blades on the circumference are arranged in a radial arrangement. The annular flow passage is formed between the impeller and the pump body, the inlet and outlet of the impeller in the outer circumference. There is a barrier between the suction port and the discharge port, whereby the suction port is separated from the discharge port.The vortex pump mainly passes the energy to the liquid by the way of continuous work, so it can produce higher pressure. In the course of energy transmission, due to the repeated impact of the liquid, the energy loss is greater, the efficiency of the pump is low, generally 20 ~ 50%. Vortex pump is only suitable for small flow (1~40 meters 3 / time), higher lift (up to 250 meters) occasions. The disadvantages are: 1) the cavitation performance is poor; 2) between the impeller and the pump body of the radial and axial clearance of the more stringent requirements for processing and assembly process is difficult; 3) pumping medium is only limited to the pure liquid. When the liquid contains solid particles, it will cause the axial and radial gap increases due to wear and tear, and reduce the performance of the pump or cause the vortex pump can not work.
The gear pump manufacturers will provide a range of products, i.e., different specifications and displacement (the amount delivered per cycle). These pumps will be coordinated with specific application processes to optimize system capacity and priceThe gear pump is mainly characterized by simple structure, convenient manufacture, low cost, small volume, light weight, good self absorption, is not sensitive to oil pollution is reliable; its main disadvantage is the flow and pressure pulsation, noise, emissions can not be adjusted.
The structure, working principle and application range of the two are different.I. gear pumpThe gear pump is a positive displacement pump, the most basic form is the same size of the two gear housing in a close cooperation of mutual engagement with the rotating inside the shell of the similar "8" shape, the two gears mounted inside the diameter of gear and work closely with both sides and shell. The material from the extruder enters the two gear in the middle of the suction port and fills the space, and as the teeth rotate, move along the housing and eventually discharge when the two gear engages.
