JK-5×3 single-rope winding type large mine hoist
In early 2011, at the request of Benxi Longxin Mining Co., Ltd. of Tongling Zhongdu Mine Construction Company in Anhui Province, Jinmin Group, after more than three months of research and development, custom‑designed and delivered a high‑specification JK‑5×3 single‑rope winding type large‑capacity mine hoisting system for the company’s shaft‑construction phase. This complete set features a main‑shaft drum with a diameter of 5 meters and a width of 3 meters, a maximum static pulling force of up to 300 kN, and is capable of handling shaft depths of 1,500 meters. The project achieved breakthroughs in design, control, and key technologies. The successful development and manufacture of China’s first complete JK‑5×3 single‑rope mine hoisting system has elevated the technological level of the domestic mining equipment manufacturing industry, filled a critical domestic gap, and laid a solid foundation for the exploitation of ultra‑deep mineral resources in China.
Images of China’s first complete set of JK-5×3 single-rope winding-type large mine hoisting equipment.
The content regarding innovation is as follows:
1 Spindle Section
The application has obtained three national patents with independent intellectual property rights:
1.1 “Single-Drum Mine Hoist Spindle Assembly”
Patent No. ZL200820220208.4.
The drum design refines Davydov’s classic conceptual framework, leveraging thin-shell elasticity theory to optimize the drum’s structure, thereby reducing internal stresses and enhancing its structural strength.
1.2 “Split-Type Brake Disc for Mine Hoists,” Patent No. ZL201020547861.9.
The brake disc on the spindle drum adopts a split‑type structure. The split brake disc is fastened to the drum end face using countersunk holes that mate with bolts and standard bolts. Radial positioning between the brake disc and the drum is achieved via a locating shoulder, while axial positioning between the split halves of the brake disc is provided by keys, making installation and transportation more convenient.
1.3 “Connecting Structure Between the Hoist Spindle and Drum,” Patent No. ZL 201020548027.1.
Spindle assembly image
2 Reducer
This project employs the XP-1450 planetary reducer, which is currently one of the largest‑capacity planetary reducers available for hoists in China. Its gears feature hardened tooth surfaces, resulting in a compact design, high transmission capacity, smooth operation, and low noise levels.
Images of the XP-1450 planetary gearbox
3 Disc brakes
In the JK series hoist disc brake system, two national patents with independent intellectual property rights have been applied.
3.1 “Rear-mounted Brake Device for Mining Use,” Patent No. ZL 200820220210.1.
3.2 “Structure of the Rear-Mounted Brake Cylinder for Mining Use,” Patent No. ZL 200820220211.6.
The hoists in this series are equipped with rear‑mounted cylinder disc brakes, which feature a compact design, responsive operation, and high safety and reliability. The braking torque is highly adjustable, and the brake’s rated torque is designed to be three times the maximum static torque.
Disc brake photo
4 Medium- and High-Pressure Hydraulic Stations
Four patents with independent intellectual property rights for medium- and high-pressure hydraulic stations:
4.1 “Oil Collection Circuit for Mining Hydraulic Stations” ZL 201020547636.5;
4.2 “Split-Type Adjustable Mining Hydraulic Station” ZL201020547590.7;
4.3 “Oil Suction Assembly for Mining Hydraulic Power Units,” ZL201020547630.8;
4.4 “Pressure-Regulating Device for Mining Hydraulic Stations,” ZL201220947626.1;
5 Electrical Control Safety Protection and Control System
5.1 Applied one software copyright under independent intellectual property rights, titled “Electrical Control System for Mine Hoisting Machinery of Jinzhou Jinkuang Electrical Appliances,” with software registration number 0427296.
5.2 The electrical control safety protection system employs multifunctional real-time monitoring, fully automatic protection, electronic depth indication, and PLC control. During operation of a single-rope winding mine hoist, it provides early warning, continuous monitoring, and real-time protection against issues such as overload, overspeed, overwind, rope slack, and brake shoe wear.
5.3 The electronic depth indicator is a multi‑functional, compact device that simplifies equipment and facilitates maintenance. Its light‑bar and digital displays provide an intuitive measurement of the elongation of a single traction rope during actual operation, enabling automatic control based on position and velocity.
Electronic Depth Indicator
6 Scientific and Technological Achievements, Test Reports, and User Feedback
In February 2013, the complete set of equipment was delivered to the customer, and by May, installation and commissioning were completed, with successful operation.
6.1 Passing Industry Product Testing
Test Report MA 2013001920L
6.2 “Provincial-Level Scientific and Technological Appraisal Certificate”
Identification Number: Liao Ke Jian Zi [2013] No. 65
6.3 “User Feedback”
6.4 In 2014, the JK-5×3 single-rope winding-type large-scale mine hoist complete equipment project also received the Liaoning Province Science and Technology Achievement Appraisal Certificate, special funding for Liaoning Province’s first major piece of equipment project, a Third-Class Provincial Science and Technology Progress Award, and a First-Class Municipal Science and Technology Progress Award.
