Speed regulator and speed regulating method for emulsion pump station on coal face

Abstract

The invention discloses a speed regulator for an emulsion pump station on a coal face. The speed regulator comprises a speed sensor for acquiring the actual rotating speed of an emulsion pump, a pressure sensor for acquiring the output pressure of the emulsion pump, a controller for receiving signals from the speed sensor and the pressure sensor, comparing the signals with a set pressure value in the controller and outputting a speed regulation control signal, and a permanent magnet speed regulator which changes the size of the air gap of the permanent speed regulator according to the speed regulation control signal provided by the controller so as to regulate the rotating speed of the emulsion pump and further regulate the liquid supply pressure of a liquid supply pump station.

Description

technical field [0001] The invention relates to power equipment for fully mechanized mining working faces in coal mines, in particular to a speed governor and a speed regulating method for an emulsion pumping station in coal mining working faces. Background technique [0002] In the power equipment of the fully mechanized mining face, the liquid supply pump station is an indispensable equipment. The liquid supply pump station includes the emulsion pump station and the spray pump station. The emulsion pump station is used to supply the hydraulic support or hydraulic The pillar conveys constant pressure liquid; the spray pump station is mainly used to provide cooling water and dust removal water for the working face, and is also the power source of high-pressure water jet equipment. [0003] Hydraulic supports in coal mines play an important role in ensuring the safety of operators and the reliable operation of working faces. The emulsion pumping station system is a device th...

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Problems solved by technology

[0005] 1. The harmonics generated by the inverter pollute the power grid, causing serious electromagnetic interference to other electronic equipment and seriously affecting the operation and communication of surrounding equipment;

[0006] 2. The power components of the frequency converter have large power consumption and serious heat generation, requiring special cooling facilities;

[0007] 3. The motor and the pump are hard-connected through a coupling, which requires high precision and is inconvenient for installation and maintenance;

[0008] 4. The inverter has strict requirements on the operating environment;

[0009] 5. The inverter is bulky and wastes space;

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