Used for the current domestic market of electric hoist winch easy to produce spark flawed in some dangerous situations and harsh environments with a hydraulic drive winch. As the reduction of the generated electric sparks of the components, using the winch hydraulic drive with strong security, reliability good, also has a smooth operation, Anzhuang use features such as a gas primarily used, the Mei Kuang Wei Xian coal dust explosion underground, as lifting and lowering personnel, coal and transport materials, machinery and equipment.
Now widely used in China Coal Mine JK, JT, JS and other models hoist low prevalence of explosion-proof performance, high energy consumption, operation complexity, cooling difficulties, poor performance and the speed too much ancillary equipment, such as negative factors. On the application of the hydraulic drive winch on the crane, lifting it high requirements for the occasion. Hydraulic winch in heavy lifting and harsh environments than the motor-driven winch to superiority.
Characteristics and scope of application of gearbox electric hoist is due to traditional motor-driven device, so electric hoist on the acetylene gas, water and gas and hydrogen gases such as mine following gas explosion would not achieve the role, even if there is explosion-proof devices, when used electric hoist the lifting operations, the field will penetrate some of flammable and explosive gas contactor electric hoist on the explosion-proof junction box, causing a strong explosion, causing a major accident.
As the electric hoist the shortcomings in its structure based on the need to design a new type of hydraulic winch. Winch for the change with the speed controlled by the electric hydraulic control, a level speed improvement for the stepless speed control, it can effectively compensate for electric hoist in the use of flaws.
As a result of the pressure oil hydraulic winch drive, electronic control system is simple, easy to solve the explosive problem, especially in the high-gas coal mine environment, explosion-proof performance is very reliable, high requirements for lifting the occasion. Through a number of standard components and compact design, speed smooth, easy operation, it has been applied in industrial production. Because hydraulic overload protection, hydraulic winch has a strong security and reliability. So, in an explosive harsh environments more than the traditional advantages of electric drive winch.
Hydraulic winch hydraulic winch design methods can be divided according to the Transmission full hydraulic transmission and hydraulic - mechanical transmission 2. About the Author is hydraulic - mechanical transmission of the hydraulic winch, which by the hydraulic motor, multi-disc friction brake, planetary gear reducer, drum, and support other components. Hydraulic winch winch brought the balance valve to prevent both body weight because of work and whereabouts, but also stability of the raise or lower the winch. The working principle of the hydraulic winch is high-speed axial piston hydraulic motors through planetary gear reducer, and then driven winch drum. Hydraulic winch is, reverse the direction by control valves to achieve, winch speed by changing pump oil input to the hydraulic motor to adjust the size to achieve the purpose of lifting.
Hydraulic winch hydraulic winch mechanical structure of the mechanical part of the winch and the general similarity, multi-disc friction brake, planetary gear reducer, drum, and support components such as the composition of other components. Hydraulic winch is used in mobile devices, in line with the principles of light and small size, preliminary design, basically the length of size between 321 ~ 340mm. Axial size of about 240mm. Winch speed reducer. Designed for the two kinds of reducer reducer used in tandem, one is disc-shaped structure of planetary bodies, their ratio is 23:1, the other is the gourd structure, its ratio to 3515: 1. Therefore, its aim to achieve two: First, to achieve slow, so that the operating speed winch has a limitation and is easy to control; the second is to enhance the torque on the winch winch Qudong, so winch in practical work have enough torque drive Jiaopan work.
Winch design forms: winch system is square