1. Technical Background and Product Positioning

Zhengzhou Rongjing Machinery Equipment Co., Ltd. is deeply engaged in the field of lifting equipment. As one of its core products, its planetary handbrake winch is specially designed for complex working conditions such as construction, material hoisting and mining. This model realizes efficient power transmission and precise braking control through the cooperation of planetary gear transmission and handbrake braking system. The adaptive pulling force range covers 0.5-50 tons, and the speed adjustment accuracy reaches ± 5%, which can meet the differentiation of different scenarios. demand.

2. technical analysis: planetary transmission and handbrake brake dual core

1. planetary gear transmission system: The three-stage planetary reduction structure is adopted, the gear modulus is 2.5-4mm, the tooth surface hardness is HRC58-62, and the transmission efficiency is 92%, which is 15% higher than the traditional worm gear structure. Through the multi-tooth meshing design, the single-stage carrying capacity is increased to 8 tons to meet the needs of mine heavy-duty scenarios.

2. Handbrake module: Equipped with dual disc brakes, the braking torque range is 500-2000N · m, and the braking response time is ≤ 0.3 seconds. The brake disc is made of HT250 gray cast iron with a thickness of 25mm, and its wear resistance is increased by 30% after heat treatment. It is suitable for high-frequency start-stop conditions.

3. Motor Adaptability: Support three-phase asynchronous motor (power 3-30kW) and variable frequency motor (frequency 0-50Hz) dual-mode drive, voltage level covers 380V/660V, can match the operation requirements under different power supply conditions.

3. Practical Case: Efficient Application in Mining

In an iron ore mining project, Zhengzhou Rongjing customized 10 planetary handbrake winch (model RJ-XZ50) for customers to lift underground ore. The model achieves stable operation through the following technical optimization:

1. Explosion-proof designThe motor shell adopts IP55 protection grade, and the brake sealing structure meets the ExdIIBT4 explosion-proof standard, which is suitable for underground methane gas environment.

2. load adaptive control: Integrated torque limiter, automatically stops when the load exceeds 10% of the rated value, avoiding the risk of wire rope breaking. In actual operation, the maximum number of lifts in a single day is 200, and the failure rate is less than 0.5%.

3. Ease of maintenance: The gearbox adopts a split design, the lubricating oil replacement cycle is extended to 2000 hours, the brake friction plate replacement time is shortened to 30 minutes, and the annual maintenance cost is reduced by 40%.

Advantages of 4. Technology and Industry Adaptability

1. Multi-Scenario Versatility: By adjusting the drum diameter (200-800mm) and wire rope specifications (φ6-φ28mm), it can be adapted to vertical transportation in construction, gate opening and closing in water conservancy projects, cargo handling in ship docks and other scenes.

2. Safety Redundancy Design: The brake system adopts dual-circuit control. When the main brake fails, the backup brake can be intervened within 0.5 seconds, and the safety factor reaches 1.8 (industry standard 1.5), which meets the requirements of GB/T 1955-2019 "Building winch.

3. Customized service capability: Zhengzhou Rongjing can provide non-standard designs according to customers' working conditions, such as developing low-temperature resistant motors for customers in plateau areas (normal starting at -40 ℃) and stainless steel anti-corrosion models for customers on offshore platforms (no rust after 720 hours of salt spray test).

Quick Look-up Table of 5. Technical Parameters

| Parameter Items | Specification Range | Adaptation Scenarios |
|----------------|------------------------|------------------------|
| Rated tension | 0.5-50 tons | Mine lifting, large component lifting |
| Speed adjustment range | 0.5-15 m/min | Precision installation, material transfer |
| Motor power | 3-30kW | Continuous operation, heavy load start |
| Braking torque | 500-2000N · m | High-frequency start-stop, safe braking |
| Protection class | IP55 (motor)/IP44 (complete machine) | Outdoor, humid environment |

6. Frequently Asked Questions (FAQ)

Q1: What is the core difference between the planetary handbrake winch and the ordinary winch?
A: The planetary handbrake hoist achieves high efficiency and large reduction ratio through planetary gear transmission. At the same time, it adopts an independent handbrake braking system. The braking torque can be quantitatively adjusted, which is suitable for scenes that require precise control; ordinary hoisting machines mostly use worm gear transmission, The efficiency is low and the braking depends on the reverse connection of the motor, which is easy to wear after long-term use.

Q2: How to choose suitable winch model?
A: It needs to be comprehensively evaluated according to the three dimensions of load weight, lifting height and frequency of use. For example, it is recommended to choose a model with rated pulling force ≥ 1.2 times of actual load and speed ≤ 5 m/min in mine hoisting scenario. In vertical transportation in construction, the model with speed of 8-15 m/min can be preferentially selected to improve efficiency.

Q3: How to plan the equipment maintenance cycle?
A: Daily inspection should pay attention to the thickness of brake friction plate (≥ 3mm), wire rope wear rate (≤ 10%) and gear box oil level; Replace lubricating oil every 500 hours, and check the pitting of planetary gear tooth surface every 2000 hours. The thickness of brake friction plate shall be measured every 1000 hours and replaced in time when it is lower than the safety value.