2. Pump working principle    Fully enclosed liquefied petroleum gas pump is a single-acting vane pump, the working principle shown in Figure 1. Mainly by the pump body 1, the inner sleeve 2, the rotor 3, the shaft 4, the slider 5, the side plate 6 (not shown) and other components. The inner sleeve and the rotor eccentric distance e, the vane placed in the rotor slot can slide along the slot, when the rotor rotates, the vane by its own centrifugal force close to the inner wall of the inner sleeve by the inner sleeve inner surface, the outer surface of the rotor , A plurality of closed working chambers are formed between the vane and the end faces of the two side plates. When the rotor rotates counterclockwise, the right vane gradually protrudes and the volume between adjacent vanes gradually increases to form a partial vacuum, and the liquid is inhaled The mouth into the studio, which is the pump inhalation process. The left of the vane is gradually pushed into the tank by the inner sleeve, the adjacent volume between the two vanes closed gradually reduced, the liquid pressure out of the mouth, which is the pump out of the process. Turn the rotor a week to complete a suction pressure. Between the suction and discharge chambers of the pump, there is a sealing zone that separates the suction and discharge chambers. Pump displacement Q and eccentricity e, the pump speed n is proportional to, so you can change the eccentricity and speed of the way to adjust the displacement or a series of products to meet the needs of different conditions. Click here to view all news photos Fully enclosed liquefied petroleum gas pump is a rotary displacement pump, displacement at a constant speed, for the number of vanes greater than 4, the displacement pulse is very small. As the pressure difference increases, the displacement decreases slightly; the fluid viscosity m has little effect on the efficiency η. These two points are obviously better than the centrifugal pump. Figure 2 vane pump performance curve. Table 1 CYQB type pump for the basic parameters. Table 1 CYQB fully enclosed liquefied petroleum gas pump basic parameters Model No Guyline Workover Rig,Workover Rig Without Guyline,Mobile Workover Rig Without Guyline,Api Workover Rig Without Guyline Sinotai Petroleum Equipment Co.,Ltd , https://www.sinotaigroup.com
   With the development of the oil industry, domestic fuel for urban and rural residents has gradually replaced the use of liquefied petroleum gas (LPG), and the application of canned liquefied petroleum gas is more and more common. In the meantime, liquefied petroleum gas stations have mushroomed. The current application of canned equipment is a single-action vane rotor pump, shaft seal with two single-end mechanical seal, one side as a shaft seal to prevent leakage of liquefied petroleum gas; sealed bearing on one side to ensure that the bearing grease lubrication. From the application situation, the pump mechanical seal there is a problem of wear and tear, the tank area taste great, causing pollution to the environment; Moreover, the seal replacement operation cumbersome, not suitable for overhaul. Based on the principle of permanent magnet drive and the successful application in the field of non-leaking magnetic centrifugal pumps , valves and reactors , the authors extend this technology to the rotor pump and design a fully enclosed liquefied petroleum gas pump to realize the sealless, Fully enclosed, absolutely sealed. The pump in addition to canned liquefied petroleum gas, but also transport liquid hydrocarbons, liquid ammonia, propylene and other similar nature of the volatile liquid and petroleum products.
1. Closed liquefied petroleum gas pump Overview