1. Technology Background and Industry Adaptability

As the core equipment in the field of lifting equipment, the technical development of the electric control hoist is directly related to the efficiency and safety of construction, mining, water conservancy and other industries. Zhengzhou Rongjing Mechanical Equipment Co., Ltd., relying on years of technology accumulation, has launched a full series of electronically controlled winches covering the pulling force range of 500kg-50t, supporting single-rope/double-rope working mode, with a speed adjustment range of 0.5-20 m/min, which can flexibly match the requirements of different working conditions. Its products have passed CE certification and conform to the national standard of GB/T 10054-2016, and have been successfully applied to key projects in more than 30 countries around the world.

2. Technology Architecture and Core Advantages

1. Drive system: The combination of three-phase asynchronous motor and frequency converter is adopted to realize 0-1500rpm stepless speed regulation. The motor power covers 3kW-75kW and is suitable for different load requirements. The inverter supports 12 safety functions such as overload protection and phase loss protection, and the failure rate is less than 0.3%.

2. Braking system: Equipped with electromagnetic brake hydraulic buffer device for double braking, braking distance ≤ 0.5m (full load condition), braking time ≤ 0.2s, to ensure safe shutdown in emergency situations. The service life of the brake is more than 500000 times, and the maintenance period is extended to 2000 hours.

3. Drive system: Planetary gear reducer transmission efficiency ≥ 95%, noise ≤ 75dB(A), gear accuracy up to ISO 6, can withstand 1.5 times the rated torque impact. The reducer adopts oil bath lubrication, and the operating temperature is stable in the range of 60-80 ℃.

Analysis of 3. Typical Application Cases

Case 1: Mining Scenario: In a copper mine project in Yunnan, Zhengzhou Rongjing provided 10 sets of 10t electronically controlled winch for shaft lifting operations. The equipment is equipped with a double-rope working mode, with a lifting speed of 8 m/min. Through the frequency converter, the intelligent switching of heavy-load low-speed and light-load high-speed is realized. The average daily lifting capacity of a single equipment reaches 1200t, and the energy consumption is 18% lower than that of traditional equipment.

Case 2: Water Conservancy Project Scenario: In the second-phase cofferdam demolition project of the Three Gorges Project, five 5t electronically controlled winch s undertake the task of hoisting underwater components. The equipment adopts IP67 protection grade motor to adapt to humid environment. The torque limiter is configured to stop automatically when the load exceeds 10% of the rated value to ensure the safety of operation. During the project, the equipment runs continuously for 3200 hours without failure, and is commended in writing by the owner.

4. technical parameters and selection guide

1. Basic parameters: tension range 500kg-50t, speed range 0.5-20 m/min, wire rope diameter 6-32mm, rope capacity 200-1000m.

2. Environment adaptationWorking temperature: -20 ℃ ~ +50 ℃, relative humidity ≤ 95%, altitude ≤ 3000m. Optional explosion-proof motor (ExdIIBT4) for chemical scenarios.

3. Selection Recommendations3-10t models are recommended for light-load high-speed scenarios (such as construction), and 15-50t models are recommended for heavy-load low-speed scenarios (such as mining). In case of multiple linkage operations, it is recommended to configure the synchronization controller to achieve action consistency.

5. maintenance and troubleshooting

1. Routine maintenance: Check the brake clearance every 500 hours (standard value 1.5±0.2mm), replace the gear oil every 2000 hours (ISO VG320 lubricating oil is recommended), and perform wire rope flaw detection every 5000 hours.

2. Common Troubleshooting：

(1) The motor cannot be started: check the power supply phase (three-phase voltage deviation ≤ 5%), frequency converter parameter setting (acceleration time is recommended for 3-5s), and thermal relay protection status.

(2) Brake failure: Measure the brake coil resistance (standard value 50-200Ω) and check the oil level of the hydraulic buffer device (to be kept at 1/2 of the observation window).

(3) Abnormal transmission noise: detect the gear meshing clearance (standard value 0.2-0.4mm), and check the wear of the elastic element of the coupling (the elastic body thickness shall be replaced if the elastic body is reduced by more than or equal to 20%).