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Many stainless steel metering pumps users use stainless steel metering pumps
Edit:Lianyungang Mi Lu Luo Pump Industry Co., Ltd   UpDate:2016-11-07

Many stainless steel metering pump users of stainless steel metering pump use, classification and use have a detailed understanding, but the working principle of stainless steel metering pump stainless steel metering pump manufacturers introduced very little, I believe that users are also a vague concept, Can fundamentally understand the working process of stainless steel metering pump. Therefore, the author of this article on the working principle of stainless steel metering pump to do a simple and clear introduction to solve the user's understanding of the working principle of stainless steel metering pump. Stainless steel metering pumps Stainless steel metering pumps are mainly composed of three parts: power driven, fluidized and regulated.
The power drive unit is reciprocated by a mechanical link system that drives the fluid delivery diaphragm, which is sucked by the fluid in the first half of the stroke and the fluid is discharged from the pump head in the latter half of the cycle; thus, the reciprocating frequency of the stroke The length of a reciprocating stroke can be achieved to adjust the amount of fluid delivery purposes. Precise machining accuracy ensures a precise metering of the delivery medium each time the pump is delivered.
From the stainless steel metering pump power drive and fluid delivery different, stainless steel metering pump can be roughly divided into plunger stainless steel metering pump and diaphragm stainless steel metering pump two kinds of categories, the following brief introduction.
1, plunger stainless steel metering pump
There are two kinds of ordinary valve and no valve pump. Plunger stainless steel metering pump is widely used in petrochemical industry because of its simple structure and high temperature and high pressure. In view of the shortcomings of ordinary piston pump under high pressure condition, a kind of valveless rotary plunger stainless steel metering pump is paid more and more attention, and it is widely used in the measurement of high viscosity medium. The plunger-type stainless steel metering pump is subject to a number of restrictions on high-pollution applications requiring fluid metering due to the structural weakness of the metered medium and the in-pump lubricant.
2, diaphragm stainless steel metering pump
Due to the segregation of the diaphragm, the isolation between the metering fluid and the driving lubrication mechanism is realized in the structure. High-tech structural design and the selection of new materials has greatly improved the service life of the diaphragm, coupled with excellent corrosion resistance of composite materials, diaphragm stainless steel metering pump has become the main application of fluid measurement pump type. In the diaphragm-type stainless steel metering pump family members, the hydraulic drive diaphragm pump due to the use of oil evenly drive the diaphragm, to overcome the mechanical direct drive mode under the pump diaphragm over-concentrated shortcomings, to enhance the diaphragm life and working pressure limit. In order to overcome the single diaphragm stainless steel metering pump may occur due to diaphragm damage caused by the work failure, and some stainless steel metering pump is equipped with a diaphragm damage to achieve the diaphragm when the automatic chain protection; with double diaphragm structure pump head to further improve its measurement Security, suitable for security protection is particularly sensitive to the application.
Pump impeller is the main component of stainless steel stainless steel metering pump, made of cast iron. The impeller on the pump impeller plays a major role, and the shape and size of the pump impeller are closely related to the performance of the pump. Pump impeller can be divided into single suction and double suction two, single suction impeller for the single side of the water, small flow pump impeller for this type. Double suction impeller for both sides of the water, large flow pump impeller are used double suction impeller.
Stainless steel stainless steel metering pump type pump impeller mainly in the following three forms, (a) closed; (b) the first half open; (c) the latter half open; (d) open one, closed impeller: , Rear cover composition. Closed impeller of the higher efficiency, manufacturing more difficult, the most used in the stainless steel metering pump. Suitable for conveying clean water, solution and other small viscosity-free cleaning fluid. Second, the semi-open impeller: generally have two structures for the first half of the open, from the rear cover and the blade composition, the structure of the impeller efficiency is low, to improve the efficiency of the need to use adjustable gap seal ring The latter half-opening, composed of the front cover and the blade, can be applied with the same seal ring as the closed pump impeller. The efficiency is basically the same as that of the closed impeller, and the blade has, in addition to the liquid, ) Sealing effect. The semi-open impeller is suitable for conveying liquid containing suspended solids such as solid particles and fibers. Semi-open impeller manufacturing is less difficult, low cost, and adaptability, in recent years in the refining and chemical stainless steel metering pump applications gradually increased, and for the delivery of water and similar water.
Third, the open impeller: only leaf and leaf reinforcement, no front and rear cover of the impeller (open impeller leaves less 2-5 tablets). Pump impeller low efficiency, less application, mainly for the transmission of high viscosity liquid, and slurry liquid. Stainless steel metering pump type pump impeller blades are generally curved blades. The blade has cylindrical and twisted two, the application of twisted leaves can reduce the load of the blade, and can improve the stainless steel metering pump suction performance, improve anti-cavitation ability, but the manufacturing more difficult, higher cost.
Pump impeller oil refining chemical stainless steel metering pump requires the impeller for the casting or welding of the whole of the whole pump impeller. Welding pump impeller is developed in recent years, and more for the casting performance of poor metal materials (such as iron and its alloys) made of chemical special stainless steel metering pump. The geometric accuracy and surface finish of the welding pump impeller are better than those of the casting impeller, which is beneficial to improve the efficiency of the stainless steel metering pump.

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