The selection of electrical equipment for electric winches should comprehensively consider environmental conditions, safety standards, functional requirements, and economy. The following are specific principles and analysis:

1、 Principle of adaptation to environmental conditions

temperature range

Standard environment: Most winch electrical equipment is designed to operate at temperatures ranging from -10 ℃ to 40 ℃ (such as JH column return winch and JD dispatch winch), suitable for conventional mining or ground operations.

Extreme environment:

High temperature environment (such as mines): F-class or H-class insulated motors should be selected to increase the upper limit of temperature resistance and prevent the motor from overheating and burning out.

Low temperature environment (such as outdoors): Use low-temperature lubricating grease and cold resistant materials to ensure reliable operation of the brake at low temperatures.

High altitude environment: When the altitude exceeds 1000m, high-altitude motors should be used or reduced in capacity (such as lowering power output) to compensate for the weakened air cooling effect.

Humidity and protection level

Humidity requirement: The relative humidity usually does not exceed 95% (at+25 ℃) to avoid electrical components from being affected by moisture and short circuiting.

Protection level:

Mine environment: Use motors and sealed brakes with protection levels of IP55 or higher to prevent dust and moisture from entering.

Outdoor environment: It is necessary to have the ability to prevent rain, fog, dew, and sand, and adapt to high and low temperature environments.

corrosive gas

Chemical environment: Use anti-corrosion coating motors or stainless steel components to prevent chemical corrosion.

Marine environment: Choose salt spray resistant motors and regularly clean the surface dirt of the equipment.

Explosive gas

Mine environment: Explosion proof electrical equipment (such as YBJ series explosion-proof motors and explosion-proof winches) must be used to ensure safe operation in gas and coal dust environments.

Certification requirements: Explosion proof motors must have a mining product safety mark certificate and comply with the standards of the Coal Mine Safety Regulations.

2、 Principles of Safety Standards and Functional Requirements

Explosion proof performance

Mining application: Prioritize the selection of explosion-proof motors and explosion-proof brakes to prevent electrical sparks from causing explosions.

Ground application: Ordinary motors can be used in non explosion proof environments, but they must meet basic requirements such as temperature and humidity.

Reliability of braking system

Braking torque: The braking torque of the brake should not be less than three times the rated static torque to ensure reliable braking in emergency situations.

Brake clearance: The clearance between brake shoes and brake wheels should be controlled within 1-3mm to avoid brake failure or excessive wear.

Safety braking: The safety brake should use heavy hammer force or spring force braking, and automatically cut off the power supply during braking.

overload protection

Motor protection: Equipped with overload protection devices (such as thermal relays) to prevent the motor from burning out due to overload operation.

Wire rope protection: Install a loose rope protection device to prevent the wire rope from loosening and causing equipment to lose control.

3、 Principles of Economy and Maintainability

economy

Cost effectiveness: Choose equipment that is reasonably priced and has low maintenance costs while meeting functionality and safety requirements.

Energy efficiency level: Prioritize the use of high-efficiency energy-saving motors (such as IE3 and above energy efficiency levels) to reduce long-term operating costs.

maintainability

Modular design: Choose equipment with compact structure and easy disassembly for quick maintenance and component replacement.

Maintenance cycle: Prioritize using equipment with long maintenance cycles (such as maintenance free bearings) to reduce downtime.

4、 Typical application scenarios and selection cases

underground coal mine

Environmental conditions: high temperature, high humidity, gas, and coal dust.

Selection plan:

Motor: YBJ series explosion-proof motor (explosion-proof type, F-class insulation).

Brake: Electromagnetic brake (explosion-proof type, IP55 protection level).

Reducer: Planetary gear transmission (compact structure, high efficiency).

Field hydrological survey

Environmental conditions: high temperature, low temperature, rain and snow, sandstorms.

Selection plan:

Motor: IP65 protection level motor (rain and dust proof).

Brake: Manual brake (low temperature resistant, easy to operate).

Structure: Integrated design for easy handling and fixation.

construction site

Environmental conditions: dust, humidity, space limitations.

Selection plan:

Motor: IP54 protection level motor (dustproof, waterproof).

Brake: Electromagnetic brake (fast response, safe and reliable).

Structure: Modular design, easy to install and disassemble quickly.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment