Jining Jiuzhong Machinery Equipment Co., Ltd.

*Vertical multi-stage centrifugal pump
Multi-stage centrifugal pump Vertical multi-stage centrifugal pump D Multi-stage centrifugal pump Stainless steel multi-stage centrifugal pump Low speed multi-stage centrifugal pump
1. Product Overview< br/> Type D multi-stage centrifugal pump is a vertical single-suction multi-stage centrifugal pump used for transporting clean water without solid particles and liquids with physical and chemical properties similar to water. Multi-stage centrifugal pumps are mainly used for water supply in high-rise buildings and can also be used for water supply and drainage in factories and mines, and for transporting liquids. The flow range is .~/the head range is ～ and the matching power range is .～. The caliber range is ～.
D, type multi-stage centrifugal pump is suitable for industrial and urban water supply and drainage, pressurized water supply in high-rise buildings, fire pressurization, long-distance water supply, heating, bathroom, boiler hot and cold water circulation pressurization, air conditioning and refrigeration system water supply and equipment supporting Wait for the occasion. The operating temperature of the medium of the D-type vertical multi-stage centrifugal pump does not exceed ℃. The operating temperature of the medium of the vertical multi-stage hot water centrifugal pump does not exceed ℃.
2. Model meaning
For example: *
-Pump suction inlet diameter
Vertical multi-stage centrifugal pump
-Design flow (/)
-Single Stage lift
- Number of stages
D-type vertical multi-stage centrifugal pump is used to transport clean water with a temperature not exceeding ℃ and liquids with physical and chemical properties similar to water. The mechanical seal can be used to transport clean water below ℃. This series of pumps has a compact structure, takes up less space, and is easy to install. It also has the advantages of smooth operation, low vibration, low noise, and long service life. It is especially suitable for domestic water supply and fire protection systems in high- and low-rise residences, hospitals, hotels, and office buildings. It can also be used Cooling water circulation for air conditioning units, etc.
Model Series Speed Efficiency Flow Lift Power Weight
r /% /
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*
*
*
*
* . /
* . /
* . /
* . /
* . /
Structure Description
Type D is vertical and segmented. Multistage centrifugal pump. According to the rotation speed, it is divided into two types: r/ and r/. The low-speed diameter has a longer life due to less wear, but it has the disadvantage of requiring larger dimensions and weight, so it is suitable for occasions that require frequent use. The high-speed type has the advantages of small size and weight, but the service life of the parts is not as good as that of the low-speed type, so it is suitable for occasional use occasions such as fire protection systems. Composition: The pump is a support structure at the upper and lower ends. The two radial thrust ball bearings at the upper end play the main supporting role and the lower end plays the auxiliary supporting role. No adjustment is required when the pump is directly connected to the motor through a coupling. The pump is mainly composed of a casing, connecting pipes and transmission connection parts. The casing mainly consists of a suction section, a middle section, an impeller, a guide vane (including the final guide vane), and a discharge section. The transmission connection part mainly consists of a shaft and a bearing box (with built-in bearings). , motor frame, coupling and other parts. Axial force: Most of the axial force of the pump is balanced by the hydraulic balancing mechanism, and the remaining axial force is borne by a pair of angular contact ball bearings lubricated with grease.
Sealing: The suction section, middle section and impeller are equipped with replaceable sealing rings respectively. The upper end of the shaft seal is sealed with packing or the lower end of the mechanical seal is sealed with a double-port cup for high-speed pumps and sealed with a paper pad for low-speed pumps. .
Bearings: The upper and lower ends of the high-speed pump are equipped with rolling bearings and lubricated with butter. The upper end of the low-speed pump is lubricated with butter and rolling bearings are used. The lower end uses sliding bearings in water (made of graphite) that are self-lubricated by the medium.
The suction port and discharge port of the pump are arranged in a horizontal direction. The water inlet is at the bottom and the water outlet is at the top. When leaving the factory, the relative positions of the two can be rotated according to the installation and use requirements of the user.
Maintenance of multi-stage centrifugal pumps
The shaft end seal of the multi-stage centrifugal pump should be checked and adjusted frequently to reduce volume loss
When the multi-stage centrifugal pump has been running for 10,000 years, it should be overhauled and restored. Pump efficiency
Promote the application of bellows sealing technology on centrifugal pumps to completely eliminate leakage of multi-stage centrifugal pumps and improve volumetric efficiency.
． Clean the filter cylinder regularly and check the pipeline connections to ensure that the liquid inlet pipeline of the centrifugal pump is smooth.
． Strictly follow the operating procedures of the centrifugal pump. Before starting the pump, open the inlet valve and close the outlet valve. Exhaust and vent the pump to check whether the inlet pressure of the pump meets the requirements. Prevent cavitation of the pump caused by low fluid supply pressure and insufficient flow.
Periodically conduct pump efficiency testing on multi-stage centrifugal pumps. For pump units with low pump efficiency, the reasons must be promptly found and corresponding measures must be taken to solve them.
Factory address: Liying Industrial Park, Rencheng District, Jining, Shandong
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