Rotary piston pumps are also often used to convey highly viscous, foamed media just as eccentric screw pumps do. Because both pumps often work in the same environment, it is common for people to simply "copy" the appropriate text for an eccentric screw pump to the rotary piston pump, ignoring their differences in properties and eventually causing the spin column The use of plugged pumps is incorrectly configured and is mainly manifested in the improper use of the rotary piston pump during operation. Water supply equipment field test Three vane pumps deliver the foamy, viscous fermentation medium from the primary fermentation reactor to the fermentation tower. When the hourly flow rate is 55 m3 / h and the pressure is 3 bar, the three vane pumps deliver up to 4% of the overall TS index. The TS index changes, will also lead to changes in the output pump, and to adjust for such changes in flow is very difficult. The vane pump is no longer capable of doing this when the fermented foam medium is delivered at a higher speed. Therefore, it was decided to continue testing the medium-sized, low-speed rotary piston pump (theoretically 3.8 Qth of output per revolution at 272 rpm, numbered 1 in this article). As a result, the achievable TS index is 9%, preferably up to 12%. In principle, people are satisfied with the performance of the rotary piston pump, but feel the service life of the rotary piston pump is not satisfactory. As this was an ideal field test site, another retest was conducted: three different vane pumps, one larger, lower speed (5.03 Qth, 218 rpm, numbered 2 in this article); two Smaller, higher speed (2.53Qth, 414 ~ 550 rev / min, in this article numbered 3 and 4). The result is very clear: Pump 1 as a standard, in the case of the same requirements, the life of the pump 4 is 1.4 times the pump 1! At the same time, it's low maintenance costs. As can be seen: small, high-speed rotation of the rotary piston pump repair costs also exceeded the 115% mark. If you do not consider the rotary piston pump procurement costs, through the average maintenance cost and service life ratio can get the production equipment users are very interested in the data: Unit working hours consumable costs or per cubic meter of the average vulnerability Maintenance costs. This is a big difference, from 40% to 116%. Smaller pumps have lower purchasing costs, smaller wearing parts repair costs and longer service life. For device users, the eigenvalues ​​derived from the simplified theory are even more interesting. Simplify, the purchase costs, the first three times the wearing parts repair costs collectively referred to as the use fee 3Z; in the back of the calculations and instructions to be used. Proper maintenance, which enabled pump 4 to cost 52%, is the best of several comparison groups. It describes the relationship between the cost of a pump and the cost of wearing parts and their service life. The total amount is only slightly more than half of the cost of the standard pump No. 1. The viscosity of the medium to be conveyed also plays an important role The right choice should be pump number 3. The TS value of the medium to be exported in the future is higher, corresponding to the required vacuum pressure of 0.5 bar under the influence of this higher TS value in order to be able to inhale the viscous foam medium. As the viscosity of the medium being fed increases, the suction chamber of the pump may be incompletely filled at high speeds, meaning that the viscous medium can not be fully aspirated and the pump efficiency is greatly reduced. On the other hand, when the medium being viscous is thick, the pump can compact them better inside the pump and achieve very high pump efficiencies without high rotational speeds. Therefore, the best use of the rotary piston pump must take into account the viscosity of the medium being conveyed, or that the optimum speed of the rotary piston pump depends on the viscosity of the medium being conveyed. The basic principle is: the higher the viscosity of the medium being conveyed, the lower the speed of the rotary piston pump should be. Metal Gasket, pipe joint, pipe fitting, metallic gasket, pipe fittings, ring joint gasket Metal Gasket and Joint Fitting Metal Gasket & Joint Fitting,Tee Joint Pipe Fittings,Oil Pipe Fitting,Lens Ring Gaskets NINGBO KINMAN AUTO PARTS CO.,LTD. , https://www.kinmantrailer.com
Often hear about the rotary piston pump in the high speed range of use. Surprising! Because the eccentric screw pump "high speed" applied to the rotary piston pump will exacerbate the rotary piston pump wear. A scientific experiment on rotary piston pumps concludes that rotary piston pumps operate economically at high speeds and that the efficiency per unit volume of rotary piston pumps increases with increasing speed. In other words: Only in the high-speed rotation of the rotary piston pump only high economic efficiency, but also serious wear and tear. In practice, people often prefer to use a smaller pump to run at high speed, do not want to use a large flow pump running at low speed. When the flow rate is constant, the small flow rotary piston pump can use a higher speed, has a good working efficiency, while its investment and maintenance (wearing parts costs) costs are lower. However, the results of field tests of water supply equipment have led to the opposite conclusion.
Experts advise you to choose the best configuration rotary piston pump