计量泵厂家,计量泵加药泵
Your current location : HOME >> News >> Technical information

Contact UsContact Us

Deqing Deyi Machinery Co., Ltd.

Contact person: Mr. Zheng

Mobile number: 13625230637

Tel: 0572-2909803

National Service Hotline: 400-185-8229

Address: No. 18, Changhong middle street, Wukang Town, Deqing County, Huzhou City, Zhejiang Province

website:en.dy-pump.com


What is the difference between multistage centrifugal pump and single-stage centrifugal pump

2021-03-25 11:39:35
Times

What is horizontal multistage centrifugal pump? What is single stage centrifugal pump? What is the difference between multistage centrifugal pump and single-stage centrifugal pump? It is the content that we all want to master for centrifugal pumps such as centrifugal pumps. What are the differences between it and metrological verification of pneumatic diaphragm pumps?

The single-stage centrifugal pump is a kind of liquid and liquid, or a mixture of floating particles and vapor or liquid chemicals. The inlet at the root of the leaf drive shaft comes in, and a centripetal force is obtained by rotating the leaf, which then causes high pressure. The material is discharged from the outlet of the pressure relief device.

Multistage centrifugal pump is a combination of two pumps with the same function. As far as the structure of liquid safety channel is concerned, its main performance is that the material pressure relief port of the former stage and the channel of the latter stage can be mutual safety channel, so that the entrance of equal proportion series is layer by layer, the pressure relief port and channel are all connected, so that the composition method of series connection, It produces a multi-stage centrifugal pump. Set the effect of multi-stage centrifugal pump is to improve the set working pressure.

The single-stage centrifugal pump consists of pump shell, pump cover, motor equipment with output shaft, pump shaft, pedestal bearing, centrifugal impeller, mechanical seal and mechanical seal capping structural components installed on the pump body. The key feature is that it includes a device between the output shaft of the motor and the pump shaft, which is called pair clamp coupling, or the device installed on the pedestal bearing, It is called the auxiliary guide rolling bearing supporting the pump shaft.

In the case of motor output shaft and pump shaft, there is an indoor space in the middle of the shaft for convenient disassembly and assembly of mechanical seal and mechanical seal cover. It is not necessary to remove the motor and pump cover when repairing or replacing the machine seal.

What is the difference between multistage centrifugal pump and single-stage centrifugal pump? Experts told you that the difference between multi-stage centrifugal pump and single-stage centrifugal pump, the key depends on the total number of centrifugal impeller. The characteristic of multistage centrifugal pump is that the pressure is too high and the total flow is small. Single stage centrifugal pump has only one stage centrifugal impeller, which is characterized by low working pressure and large total flow.

1、 Unipolar pump is only a centrifugal impeller pump, the larger pump head is only 125 meters.

Second, for the multi-stage centrifugal pump with two or more centrifugal impellers, the larger pump head can exceed the pump head of the single-stage centrifugal pump; Multi stage centrifugal pump in the case of unipolar pump head, must be combined with two-stage motor, according to the number of lifting centrifugal impeller to apply to four stage motor, and then can improve the pump life and reduce the noise of generator set, but the maintenance of multi-stage centrifugal pump relative unipolar pump is a little difficult.

Third, when the specific pump lift is not more than 125 meters, according to the total area of the pump's personal studio and the price of the pump, the multi-stage centrifugal pump is generally more expensive. We should also consider all aspects of the reasons comprehensively. We should choose unipolar pump or multi-stage centrifugal pump.

Fourth, because there is only one centrifugal impeller on the pump shaft of single-stage centrifugal pump, and there are many centrifugal impellers connected in series on the pump shaft of multi-stage centrifugal pump, the multi-stage centrifugal pump is installed by the centrifugal impeller above the second stage on the same shaft to rotate together. In the work, the output of the front centrifugal impeller goes to the rear centrifugal impeller, and each layer of centrifugal impeller leaf is installed, It's called level one.

Installation of 2 above the pump is called multi-stage centrifugal pump, so the unipolar centrifugal pump is only installed with a centrifugal impeller. In the installation method, this is different from the metrological verification of pneumatic diaphragm pump.

The key of multistage centrifugal pump is composed of motor stator, motor rotor, rolling bearing and water pump seal

1. A key part of motor stator of multistage centrifugal pump is composed of suction section, middle section, discharge section and guide vane. Each section is clamped by tightening anchor bolts to form a personal working room. D type pump general level suction, vertical upward spit out; When the oil and gas field is filled with water, the import and export trade of the pump is vertically upward. DG type multistage centrifugal pump outlet and passage are vertical upward.

2. The rotor of the motor of the multi-stage centrifugal pump is mainly composed of shaft, centrifugal impeller, balance plate and coupling. The axial force is balanced by the balance plate.

3. The rolling bearing of multistage centrifugal pump is mainly composed of rolling bearing body, rolling bearing and rolling bearing cover. The rolling bearing is lubricated with vegetable oil or thin oil.

4. The pump seal of multistage centrifugal pump adopts soft rotary seal, which is mainly composed of water seepage section and sealing box on tail cover, filler, water retaining ring, etc. The discharge valve water of type D pump comes from the working pressure water in the pump. DG pump exhaust valve water from the outside power supply.

5. The multi-stage centrifugal pump and the rotary pump are driven immediately by the driving device according to the shaft coupling. From the end of the transmission device, the pump is a clockwise rotation D, DG type pump, which is a vertical single suction multi-stage centrifugal pump. It is used to transport cold water (impurity content less than 1%, particle size less than 0. Mm) or other liquids with similar physical characteristics. The temperature of material transported by D-type pump is lower than 80 ℃, which is suitable for mining drainage pipeline, oil and gas field irrigation, processing plant and water supply and drainage pipeline in big cities. According to the corrosion of materials, different materials are selected for water injection pumps in oil and gas fields. DG pump transport material temperature below 105 ℃, suitable for all kinds of heating furnace water supply and drainage.


Tags

0


Deyi Machinery WeChat

TEL 400-185-8229

Copyright 2018 Deqing Deyi Machinery Co., Ltd. All rights reserved 浙ICP备17011799号-2 Metering pump manufacturer, metering pump dosing pump, diaphragm pump manufacturer Technical Support:中企视窗 Some of the content pictures on this site come from the Internet. If there is any infringement, contact the administrator to delete it as soon as possible, thank you!
   

浙公网安备 33052102000591号