1. Technical Background and Industry Positioning

In the field of lifting equipment, as the core power device, the performance of the hoist directly affects the efficiency and safety of the operation. Zhengzhou Rongjing Machinery Equipment Co., Ltd. has been deeply engaged in the industry for many years. Relying on the research and development capability of all categories, it has launched a series of planetary handbrake winches, covering the pulling force range of 5-50 tons, which are suitable for complex working conditions such as construction, mining and water conservancy projects. This model adopts planetary gear reduction mechanism and mechanical hand brake system, and realizes the precise matching of power and control through modular design, which has become the preferred scheme for customers in many industries.

Principles and core advantages of 2. technology

1. Planetary gear reduction system
The planetary hand brake winch adopts NGW type planetary gear transmission structure, which realizes multi-stage deceleration through the meshing of sun gear, planetary gear and inner ring gear. Compared with the traditional cylindrical gear reducer, its volume is reduced by 40%, the transmission efficiency is increased to 92%, and it has the characteristics of average load, and can withstand the instantaneous overload of 1.5 times the rated torque. For example, in a mine shaft lifting scenario, the gearbox temperature rise is controlled within 35°C during 8 hours of continuous operation to ensure long-term operational stability.

2. Mechanical hand brake device
The brake system adopts a double-disc mechanical hand brake structure. The brake disc has a diameter of φ400mm and a thickness of 25mm. With high friction coefficient brake linings, emergency braking can be realized within 0.3 seconds. The measured data show that under the condition of full load of 50 tons, the braking distance is less than or equal to 0.5 meters, and the safety coefficient is 1.2 times of the industry standard. In addition, the handbrake mechanism supports manual/automatic dual-mode switching to meet the needs of different operating habits.

3. Modular power adaptation
The power unit provides two options of three-phase asynchronous motor (power range 7.5-75kW) and variable frequency motor, supporting 380V/660V dual voltage input. Through the frequency converter adjustment, the speed can be adjusted steplessly in the range of 5-30 m/min, which is suitable for fine operation scenes such as material hoisting and equipment installation. For example, in the container handling project of the ship terminal, after the customer chooses the variable frequency model, the single operation time is shortened by 20% and the energy consumption is reduced by 15%.

Analysis of 3. Typical Application Cases

Case 1: water conservancy project gate opening and closing
A large reservoir project needs to frequently open and close the cast iron gate with a height of 12 meters, and the traditional hydraulic system has the risk of oil leakage and high maintenance cost. Zhengzhou Rongjing customized the planetary handbrake winch scheme for it. It uses a 25-ton pulling machine and is equipped with a double rope winding system to ensure the balance of wire rope tension on both sides through the synchronous shaft. In the past 2 years of operation of the project, the cumulative number of opening and closing times has exceeded 5000, the brake system has zero failure, and the maintenance period has been extended to 6 months/time, saving 40% of the operation and maintenance cost compared with the hydraulic system.

Case 2: mine inclined shaft lifting
In the inclined shaft lifting project of a gold mine in Inner Mongolia, the inclination angle of the shaft is 28 ° and the lifting length is 800 meters. In view of the wet and dusty underground environment, IP55 protection grade motor and stainless steel brake disc are adopted, and anti-falling safety lock device is added. The actual measurement shows that the model can still maintain 90% of the rated pulling force in the low temperature environment of -20 ℃, and the wear rate of the brake lining is 30% lower than that of the ordinary model, which effectively ensures the safety of underground operation.

4. technical parameters and selection guide

Basic Parameter Table
| Model | Rated tension (ton) | Wire rope diameter (mm) | Motor power (kW) | Braking torque (N · m) |
|------|----------------|------------------|----------------|----------------|
| HJX-5 | 5 | φ16 | 7.5 | 1200 |
| HJX-10 | 10 | φ22 | 15 | 2500 |
| HJX-25 | 25 | φ28 | 30 | 6000 |
| HJX-50 | 50 | φ36 | 55 | 12000 |

Selection considerations
1. Tension matching: Select the model according to the load weight and safety factor (usually 1.5-2), for example, HJX-25 type is required for hoisting 30 tons of equipment.
2. Speed requirement: frequency conversion model is preferred for fine operation, and constant speed model can be selected for high-speed handling to reduce cost.
3. Environmental adaptability: IP55 and above protection grade shall be selected in humid environment, and stainless steel parts are recommended for corrosive working conditions.

5. FAQ Frequently Asked Questions

Q1: What is the difference between the planetary handbrake winch and the worm gear winch?
A: Planetary gear transmission efficiency is higher (92% vs 75%), and the volume is smaller; the turbine worm model has strong self-locking, but it is easy to wear after long-term use, and is suitable for low-frequency and heavy-duty scenarios.

Q2: Does the brake system need regular maintenance?
A: It is recommended to check the thickness of the brake lining every 3 months (the remaining ≥ 5mm needs to be replaced), lubricate the brake axle pin every 6 months and adjust the brake clearance to 1-1.5mm.

Q3: Can you customize non-standard models?
A: Zhengzhou Rongjing supports customization of parameters such as tension, speed, installation size, etc. The minimum order quantity is 1 set, and the delivery period is 15-30 working days.