1. technical analysis: the core principle and architecture design of vertical circulating winch

The vertical circulating winch is an efficient equipment developed by Zhengzhou Rongjing Machinery Equipment Co., Ltd. for lifting requirements under multiple working conditions. Its core principle is based on the deep integration of planetary gear transmission and circulating winding technology. Through the planetary gear set to achieve multi-stage reduction, with high strength wire rope cycle winding design, can achieve large tension output in a limited space. The equipment adopts vertical layout, and the motor and reducer are installed vertically, which effectively reduces the occupied area and adapts to narrow working conditions such as ship dock and mining. In terms of technical parameters, its rated pulling force range covers 5-50 tons, the diameter of steel wire rope can be Φ12-Φ32mm, the rope capacity of drum can reach 200-800m, and it supports 0-30 m/min stepless speed regulation to meet the dynamic requirements of different operation scenarios.

2. Practice Guide: Installation and Commissioning Procedures for Vertical Circulating winch

STEP 1: Basic Installation. According to the weight of the equipment (usually 3-15 tons), the concrete foundation is selected, the thickness is not less than 300mm, and the embedded anchor bolt spacing error is less than or equal to 2mm. STEP 2: Electrical Connection. Three-phase 380V power supply is adopted, the cross-sectional area of the cable shall match the motor power (e.g. 15kW motor with 10mm ² copper core cable), and the grounding resistance shall be ≤ 4Ω. STEP3: No-load test run. After starting, observe whether the rotation direction of the drum is consistent with the mark, and the brake sensitivity test shall be completed within 0.5 seconds. STEP4: Load debugging. The first hoisting shall be carried out at 50% of the rated pulling force, and the bearing temperature rise (≤ 65 ℃) and the arrangement of wire ropes shall be checked after continuous operation for 2 hours. The technical team provided by Zhengzhou Rongjing can guide the parameter calibration on site to ensure the smooth operation of the equipment to meet the ISO 4301 standard.

3. industry applications: technology landing cases in water conservancy projects.

In a large reservoir gate lifting project, the vertical circulating winch (model RJ-LX50) provided by Zhengzhou Rongjing successfully solved the problems of large space occupation and low speed regulation accuracy of traditional equipment. The project requires the vertical lifting of the 50-ton gate in a narrow machine room of 10m × 8m, and the positioning accuracy of ± 5mm needs to be realized in linkage with PLC control system. The technical team optimized the diameter of the drum to 800mm through customized design, and cooperated with the frequency converter to realize 0.1-15 m/min segmented speed regulation. Finally, the operating noise of the equipment was ≤ 75dB, and the braking distance was shortened to 0.3 seconds. The project acceptance data show that the equipment has been running continuously for 180 days without failure, and the energy consumption is 18% lower than that of similar products, which is highly praised by the owner for "strong technical adaptability and timely service response.

4. technology advantages: dual protection of materials and processes

Zhengzhou Rongjing uses Q345B low-alloy high-strength structural steel in the manufacture of vertical circulating winch. Its yield strength is ≥ 345MPa and its tensile strength is 470-630MPa, which is 30% higher than that of ordinary carbon steel. Key components such as planetary gears and reel shafts are carburized and quenched, with surface hardness of HRC58-62 and wear resistance of 2 times. The assembly process of the whole machine implements ISO 9001 quality management system, and quantitative control is realized from gear meshing clearance (0.15-0.35mm) to bolt torque of steel wire rope pressing plate (200-250N · m) to ensure stable operation of the equipment at ambient temperature of -20 ℃ to +50 ℃.

5. FAQ: Analysis of Technical Difficulties of Vertical Circulating winch

Q1: How to ensure the braking reliability of the equipment under high-frequency start-stop conditions?
A: Hydraulic disc brake is adopted, the friction coefficient of the brake pad is ≥ 0.4, and the ratio of the diameter of the brake disc to the diameter of the drum is ≥ 1.5. With the dual-circuit hydraulic system, 80% braking torque can be maintained even if a single circuit fails.

Q2: How to solve the problem of speed difference when multiple devices operate synchronously?
A: The speed closed-loop control is realized through the external frequency converter, and the speed fluctuation rate is less than or equal to 0.5. With the encoder feedback signal, the synchronization error of 32 devices can be ensured to be less than or equal to 10mm.

Q3: How to set the equipment maintenance cycle?
A: Daily inspection shall be carried out in each shift (wire rope wear and brake clearance), gear oil shall be replaced for monthly maintenance (ISO VG320 is recommended), and drum wall thickness shall be tested for annual overhaul (minimum allowable value ≥ 90% of design thickness).