Due to the high level of electrical

Due to the high level of electrical technology in foreign countries, high degree of mechanization in underground engineering, general roadway and Chambers are larger, equipment installation is convenient, early to promote the application of electric explosion-proof winch, mainly around the linear motor rotor external electronic speed regulation. Its disadvantages are serious heating, large floor area, complex electronic control system, high cost, poor adjustment. With the continuous development of hydraulic technology, the series products of axial piston and radial piston hydraulic motors are introduced, and are gradually used in downhole hoisting equipment and development of hydraulic explosion-proof winch. Hydraulic explosion-proof winch has the advantages of compact structure, cheap cost, smooth starting, convenient speed regulation, overload protection, etc., especially the use of squirrel cage motor to drag, so that the electronic control system is simple, to achieve the explosion-proof requirements. In foreign countries, the hydraulic explosion-proof winch can be divided into two categories according to its structure: one is the full hydraulic transmission type which USES low speed and large torque plunger hydraulic motor to directly drag the winch drum; Another is the use of high speed small torque plunger hydraulic motor through the reducer drag winch drum hydraulic - mechanical transmission. Electric riot winch includes dispatch winch and pillar winch. Dispatching winch is used for underground stoping working face and tunneling working face loading station, dispatching marshalling harvesters and middle roadway haulage harvesters, and it can also be used for short distance transportation of materials, which is widely used underground.