JKM

Multi-rope friction hoists, classified according to their installation type, are available in shaft tower and ground-mounted designs. They are primarily used in vertical shafts of coal, metal, and non-metal mines for lifting coal and minerals, transporting personnel, lowering materials and equipment, and performing other similar operations.

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Multi-rope friction hoist

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Hebi Shuangmin Mining Machinery

Purpose and Scope of Application

The electrical equipment supplied with this product is not explosion-proof and therefore cannot be used in environments containing flammable or explosive substances such as gas or coal dust.

Product execution standards

The JKWD and JKM series of multi-rope friction hoists are designed and manufactured in compliance with standards including A01036-2007 “Safety Inspection Code for Multi-Rope Friction Hoists Used in Coal Mines,” GB/T10599-2010 “Multi-Rope Friction Hoists,” and 0/HBSHM006-2010 “Enterprise Standards,” as well as coal mine safety regulations.

Working principle

The multi-rope friction hoist operates on the principle of flexible-body friction transmission. Steel wires are laid across a friction wheel, and the lifting or lowering of containers, heavy objects, or personnel is achieved through the frictional force between the steel wires and the friction lining pads.

A closed steel wire rope with a container suspended from its middle is wound around a drum. As the motor drives the drum to rotate, the friction between the steel rope and the drum enables the container to be lifted and lowered. Speed regulation is achieved through electrical transmission. The disc brake is actuated by hydraulic and electrical controls to provide braking. Depth indication of the container is realized via various position-indication systems. A comprehensive mechanical, electrical, and hydraulic integrated system, comprising diverse sensors and control components, ensures overall machine monitoring and protection. Information transmission—both within and outside the hoist—is facilitated by computer and network technologies.

Advantages of multi-rope friction hoists

(1) The lifting container and its load are supported jointly by multiple steel wire ropes. Compared with single-rope winding hoisting equipment, this system uses smaller-diameter copper wire ropes, resulting in a correspondingly smaller diameter for the drum and reduced overall machine dimensions. Consequently, the equipment is lighter in weight and better suited for deep-shaft and large-scale operations. It can meet the growing demands of mines for larger-scale operations and deeper mining development.

(2) Since the hoisting container is suspended simultaneously from multiple steel wire ropes, these ropes generally will not break at the same time (though slippage may occur in the ropes if the tensile force exceeds a certain threshold), so it is not necessary to install a fall-arrest device.

(3) Multi-rope friction hoisting systems are generally balanced hoisting systems with smaller sheave diameters. As a result, these systems have lower inertia and torque, leading to reduced motor power requirements and lower energy consumption.

(4) The number of strands in a wire rope is generally even, with an equal proportion of left-hand and right-hand twists. This arrangement allows the opposing twists to counteract each other, thereby reducing the loosening torque during the wire rope’s operation, lessening the running resistance exerted by the hoisting container on the guide rails, and extending the service life of both the guide rails and the lug fittings.

(5) When tower-type hoisting is employed, the friction-wheel hoist is installed on the shaft tower, thereby reducing the footprint of the hoisting equipment.

Technical Parameters

Serial Number	Product Model	Friction wheel diameter	Number of steel wire strands	Coefficient of friction	Steel wire Rope most Great stillness Tension Poor	Steel wire rope most Large static tension		Steel wire rope Maximum Diameter		Wire rope spacing	Maximum lift Rate of climb		Guide wheel diameter	Theory Heavy Quantity (not Includes Electrical)	External dimensions Length × Width × Height
						Steel wire rope most Large static tension		Steel wire rope Maximum Diameter			There is a reducer.	Without a reducer
						With guide To the wheel	No guide To the wheel	With guide To the wheel	No guide To the wheel		There is a reducer.	Without a reducer
		m	Root		kN	kN		mm		mm	m/s		m	T	mm
1	JKM-1.6×4P I	1.60	4	0.25	40	One	150	One	20	250	8	One	1.60	18.7	7 × 5.4 × 2
2	JKM-1.85×4P I	1.85			45/50	150	165	20	22		10		1.85	29.2	8×8×2
3	JKM-2×4PI	2.00			55	180		22					2.00	31.8	8×8×2
4	JKM-2.25×4PI	2.25			65	215		24					2.25	35.2	8×8×2
5	JKM-2.6×4P I	2.60			100	330		28			15		2.60	41.2	8.3 × 8 × 2.6
6	JKM-2.8×4P I	2.80			100	335		30					2.80	46.7	8.3 × 8 × 2.6
7	JKM-3×4PI	3.00			140	450		32		300			3.00	60.3	8.9 × 8.5 × 2.6
8	JKM-3.25×4PI	3.25			160	520		36					3.25	68.5	8.9 × 8.5 × 2.8
9	JKM-3.5×4PI	3.50			180	570		38					3.50	76.3	10.8 × 9 × 2.8
10	JKM-4×4PI	4.00			270	770		44					4.00	85.2	11.5 × 9 × 2.8

1	JKM-1.85×4PⅢ	1.85			45/50	150	165	20	22	250	One	16	1.85	22.5	7×7×2
2	JKM-2×4PⅢ	2.00			55	180		22					2.00	26.7	7.2 × 7 × 2
3	JKM-2.25×4PⅢ	2.25			65	215		24					2.25	30.8	7.2 × 7 × 2
4	JKM-2.6×4PⅢ	2.60			100	330		28					2.60	35.6	7.5 × 8 × 2.6
5	JKM-2.8×4PⅢ	2.80			100	335		30					2.80	42.2	7.5 × 8 × 2.6
6	JKM-3×4PⅢ	3.00			140	450		32		300			3.00	53.6	8 × 8 × 2.6
7	JKM-3.25×4PⅢ	3.25			160	520		36					3.25	60.3	8 × 8.5 × 2.8
8	JKM-3.5×4PⅢ	3.50			180	570		38					3.50	67.5	8 × 9 × 2.8
9	JKM-4×4PⅢ	4.00			270	770		44					4.00	77.6	8.5 × 9 × 2.8

1	JKM-2.8×6PI	2.80	6	0.25	160	520		.30		250	15	One	2.80	66.5	8.5 × 8 × 2.6
2	JKM-3×6PI	3.00			220	670		32		300			3.00	75.3	9.3 × 8.5 × 2.6
3	JKM-3.5×6PI	3.50			270	860		38					3.50	89.5	11.2 × 9 × 2.8
4	JKM-4×6PI	4.00			340	1100		44					4.00	115	11.8 × 10 × 2.8
5	JKM-2.8×6PⅢ	2.80			160	520		30			One	16	2.80	60	7.8 × 8 × 2.6
6	JKM-3×6PⅢ	3.00			220	670		32					3.00	65	8.5 × 8 × 2.6
7	JKM-3.5×6PⅢ	3.50			270	860		38					3.50	72	8.5 × 9 × 2.8
8	JKM-4×6PⅢ	4.00			340	1100		44					4.00	90	9 × 9 × 2.8
Note: 1. According to usage requirements, the diameter of the friction wheel in the table may vary within a range of ±4%; relevant parameters shall be adjusted accordingly. Note: 2. When selecting, if the system’s anti-slip calculation fails to meet the requirements, the entire lifting system should be adjusted. If the requirements still cannot be met after adjustment, you may select a higher gear level. Note: 3. The maximum lifting speed shall not exceed the limits specified in this table as well as in clauses 5.2.11 and 5.2.12 of the AQ 1036-2007 standard.