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An automatic speed-regulating and pressure-maintaining energy-saving pump

An automatic speed regulation and energy-saving pump technology, applied in the direction of pump, pump control, pump device, etc., can solve the problems of large floor space, high device cost, huge system, etc., and achieve the effect of improving pressure stability and efficiency.

Active Publication Date: 2017-03-22
NANJING MAGNET INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used speed regulation method is frequency conversion speed regulation, but frequency conversion speed regulation requires frequency conversion device and control device, which has the disadvantages of high device cost, complicated control, large system and large floor space.

Method used

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  • An automatic speed-regulating and pressure-maintaining energy-saving pump
  • An automatic speed-regulating and pressure-maintaining energy-saving pump
  • An automatic speed-regulating and pressure-maintaining energy-saving pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]A pump with rated flow rate of 1485rpm, voltage of 10000V, 4000m³ / h, head of 32m, and efficiency of 0.84. If a system with a flow demand of 3000m³ / h and a lift of 26m is supplied with water, it needs to be adjusted through a throttle valve. The actual output flow of the pump is 3000m³ / h, the water pressure is 38m, the working efficiency is 0.78, and the power consumption of the pump is 397.9kW. , the flow behind the valve is 3000m³ / h, and the water pressure is 26m. When the water demand of the system is reduced from 3000m³ / h to 2400m³ / h, if the opening of the pipeline valve remains unchanged, the actual water supply pressure of the system will increase to 26m, resulting in a pressure fluctuation of 2m. The actual output flow of the pump is 2400m³ / h, and the pressure is 40m, the efficiency is 0.76, and the power consumption of the water pump is 348.3kW.

Embodiment 2

[0030] Compared with Example 1, adding a variable frequency speed control device will add 5 to 6 high-voltage variable-frequency control cabinets and auxiliary devices, covering an area of ​​more than 2 square meters. At the same time, high-voltage cables and filter devices need to be added, with a total investment of about 400,000 yuan. This embodiment will increase the investment by no more than 150,000 yuan on the basis of the comparative embodiment.

[0031] An energy-saving pump with a rated flow of 4000m³ / h, a head of 32m, a rated speed of 1485rpm and an efficiency of 0.84. If a system with a flow demand of 3000m³ / h and a head of 26m is supplied with water. The working pressure is set to 26m through the pressure regulating nut 55, the actual output flow of the pump is 3000m³ / h, the output pressure of the pump is 26m, the valve is fully opened, the working speed of the pump is 84.8% of the rated speed, the working efficiency is 0.83, and the power consumption of the pump ...

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Abstract

The invention discloses an automatic speed adjusting and pressure maintaining energy-saving pump. The automatic speed adjusting and pressure maintaining energy-saving pump comprises a motor, a flange, an electromagnetic induction cylinder, a torque pin shaft, a permanent magnetic cylinder assembly, a transition bearing, a sliding outer sleeve, a pressure maintaining cylinder assembly, a main shaft assembly, a machine base, a pump shell and a speed adjusting mechanism. The electromagnetic induction cylinder is fixed to the motor through the flange. The flange is arranged on the output shaft of the motor in an expansion manner under coordination of a conical face. The electromagnetic induction cylinder is fixed to the flange. The permanent magnetic cylinder assembly is connected with the sliding outer sleeve through the transition bearing, is in clearance fit with the sliding outer sleeve and the main shaft assembly and can slide in the axial direction. Torque transmission is conducted between the permanent magnetic cylinder assembly and the main shaft assembly through the torque pin shaft. The permanent magnetic cylinder assembly is in clearance fit with the torque pin shaft. The main shaft assembly, the pump shell and the motor are all fixed to the machine base. The pressure maintaining cylinder assembly and the speed adjusting mechanism are arranged on the sliding outer sleeve and the main shaft assembly. According to the automatic speed adjusting and pressure maintaining energy-saving pump, the rotating speed of the water pump is automatically adjusted and the output water pressure is maintained basically constant under the common action of outlet water pressure and adjustment of the speed adjusting mechanism.

Description

technical field [0001] The invention relates to an energy-saving pump, in particular to an automatic speed-regulating pressure-maintaining energy-saving pump. Background technique [0002] Pump is a device for transporting liquid, mainly used to transport water, oil and slurry liquid. In the existing industrial technology, pumps mainly include piston type, plunger type and centrifugal type, among which centrifugal pump is the most common. . Centrifugal pumps are widely used in high energy consumption fields such as petroleum, chemical industry, electric power, metallurgy and building materials. According to statistics, the energy consumption of centrifugal pumps in the industrial field accounts for more than 10% of the national total power consumption. The actual flow rate of a large part of these pumps is higher than the rated The flow rate is low, and some are even much lower. In order to meet the requirements of use, the method of throttling through the valve is often us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D15/00F04D13/06
Inventor 刘凤玲黄进赵晓莉曾刚
Owner NANJING MAGNET INTELLIGENCE TECH CO LTD