JKM/JKMD type multi-rope mine friction hoist

Application range:

The JKM/JKMD type multi-rope mine friction hoist is mainly suitable for vertical shaft of coal mine, metal, non-metallic mine, for lowering materials, lifting personnel and equipment.

Carried standards:

JKM/JKMD type multi-rope mine hoist winders are according to AQ/HBWF006-2014 "multi rope friction mine hoist" enterprise standard, AQ1036-2007 “multi rope friction hoist for coal mine safety inspection specifications” and GB/T10599-2010 standard for multi rope friction hoist and "coal mine safety regulations" to design and manufacture of the products.

Working principle of JKM/JKMD type multi-rope mine friction hoist:

Working principle of Multi rope friction hoist is that it use flexible body friction transmission, steel wire rope on the friction wheel, using the frictional force between wire rope and the the friction liner to lifting and lowering the material or personnel.

Full Digital Frequency Control System of JKM/JKMD type multi-rope mine friction hoist:

1.The primary loop control mode: Full digital frequency control, capacity to choose enough margin.

2. Control loop mode: PLC programmable controller. Adopts the new type of electric control system, digital frequency control of motor speed, Siemens PLC control,the control principle of conform to the requirements of the ascension process, and has a more perfect hardware and software protection link, the major protection to realize double protection. Electric control system based on signal to case, manual or semi-automatic acceleration, automatic deceleration, automatic parking.

Features:

①stepless speed regulation, stable speed and continuous adjustment

②Compared with the traditional form of rotor resistance energy saving is obvious

③Advanced technology, represents the development direction of electric hoist communication

④Mature technology, has entered the stage of popularization

⑤Noise less, small volume

3.Main features of equipment:

①Double circuit power supply into line with the corresponding control, measurement and protection functions; Double power supply into line using a with a way for working;

②Install UPS uninterrupted power supply device in cabinet, supply power to control equipment and PLC, to ensure that after the low voltage power failure, can make mine hoist to achieve reliable safety braking and maintain data;

③Using frequency converter as digital regulation speed control device, realize stepless speed regulation, to achieve steady speed; Canceled a large number of rotor resistance, significantly reduce the energy consumption, save operating cost; Also reduces the occupied area;

④Has a strong anti-interference ability, strong adaptability to environment; Harmonic component is small, the grid pollution-free; Adopts frequency conversion vector control technology, the actual speed with predetermined speed change, speed figure from the constant speed to decelerate paragraphs, deceleration period of crawl to the period of transition of smoothness good, compared with the DC drive hoist, had better performance of speed adjustment;

⑤Mine hoist digital inverter power supply device running according to the "S" type given curve, through the man-machine dialogue interface, use convenient debugging, according to the use of different occasions to make different parameters;

⑥Has strong internal software failure and external line fault diagnosis function, in the case of diagnosis to the fault, the device first stop working automatically, prevent fault further, at the same time, making accurate fault alarm.

Safety Protection:

1. The command control handle zero interlock

2. The brake handle zero interlock

3. The main circuit power protection

4. Brake oil pressure limit protection

5. misorientation protection

6. constant speed, overspeed protection

7. slowspeed overspeed protection

8. 0ver winding protection

9. depth indicator axle broken protection

10. Spring fatigue,the wear of brake shoe protection

11. safe device against slack rope

12. Slide protection

13. Inverter failure

14. rope adjusting interlocking

15. constant speed protection

16. 2m speed limit protection

17. overload protection

18. full warehouse protection

19. oil temperature protection

20. Hydraulic station high residual pressure protection

21. The rope regulating clutch failure protection

22. undervoltage protection

Spindle device of JKM/JKMD type multi-rope mine friction hoist:

Spindle device is the operation mechanism of mine hoist, and is the main load-bearing part.It take the hoist full torque, as winding type hoisting wire rope to withstand various normal loads(static load and dynamic load)and special load. Is mainly composed of the main shaft, bearing, bearing seat, bearing beam, drum, supporting wheels, plate, high strength bolt and other components. Spindle adopts 45#carbon steel forging, after two times nondestructive flaw detection, mechanical performance testing, in line with the national standard, practical and reliable performance, besides and coupling parts, no longer the other grooving on the spindle, not only ensure the strength and ensure the spindle rigidity, greatly enhance the security of the spindle and prolong the service life; Adopting the domestic main shaft bearing, watts, bearing, reliable operation, improved the efficiency of rotation.

Drum is made of 16mn high quality low carbon alloy steel plate welding forming, the roll deformation can quickly spread, after carrying the deformation and stress concentration, effectively improve the bearing capacity of roll and the fatigue strength. Drum after aging vibration stress re-lief to prevent the drum deformation after welding; Brake disc are all made of 16mn plank, resistance to deformation, wear-resisting.Can be made into split according to user demand, all the subdivision of drum and the brake disc, are probably ready in factory, can be used in the use of on-site installation, do not need to make any rework on site.

Double drums mine hoist using radial gear block of hydraulic rope adjusting method. When adjusting rope, through the work station control easily, with hydraulic clutch action, so that the spindle and activity produces relative rotating drum, adjusting fast and reliable.

The Structures of drums showing as below:

①0verall welding structure.This drum structure is overall welding, brake disc also welded on the drum at the same time.

②0verall welding structure.Brake disc is divided into two halves and connect drum with high strength bolt.

③some parts of Drum is welded, drum is divided into two or four parts, disc brake is divided into two halves, and connect drum with high strength bolt.

Speed Reducer of JKM/JKMD type multi-rope mine friction hoist:

Planetary gear transmission as compared with the ordinary gear transmission, when their parts material and the mechanical properties, manufacturing precision, work conditions, are all same, but the former has a series of advantages, as there are some main characteristics of planetary gear transmission as below:

(1)Small volume, light weight, compact structure, large power and high bearing capacity, this feature is determined by internal factors such as the structure of planetary gear transmission: ①power dividing ②The reasonable application of internal contact ③Transmission device of the type of coaxial line.

(2)Large transmission ratio

As long as the appropriate choose of the planetary transmission type and matched gear scheme, can use a few of the gears and get large transmission ratio.When not as power transmission and mainly used to transmit the movement of the planetary mechanism, its transmission ratio can be up to several thousands. In addition, the planetary gear transmission because of its three native components can be driven, so it can realize the scompostion and resolution of motion, as well as organic and stepless variable speed drive and other complex movement.

(3)High transmission efficiency

Due to the planetary gear transmission using the symmetrical shunt transmission structure which has evenly distributed a number of planet gears, make acting force of the center of the wheel and the turning arm bearing reaction force balance each other, to improve the transmission efficiency. In the transmission type under the condition of a proper and reasonable structure layout, the efficiency can reach 0.97~0.99.

(4)Smooth movement with a strong ability to resist shock and vibration

Due to adopts a number of the same planet gears, distributed evenly around sun gear, which can make the planet gear and the inertial force of revolving arm balance each other. At the same time, the meshing gear increased, so the smooth movement of the planetary gear transmission, stronger impact and vibration resistance, and more reliable working.

The oiling of gear is worked by a separate oil lubrication station with thin oil forced lubrication.

Disc brake of JKM/JKMD type multi-rope mine friction hoist: 

Disc brake is an important executive components of mine hoist and mechanism of dynamic system of hydraulic station, pipeline system supporting a complete set of brake system, suitable for hoist working brake and safety brake

Disc brake is a brake force generated by the butterfly spring, brake off by hydraulic oil pressure, brake force along the axial action type brake. The braking force size, use, maintenance and safe operation and adjustment of the brake force has significant influence on safety running of the whole lifting system. Installation and use unit must attach importance to it, to ensure safety operation.

Features:

1. Braking force has good adjustability

2. Small Inertia, fast, high sensitivity

3. High reliability, Multiple brakes can work at the same time, not less than 2 sets, can be up to 12 sets, so if there is a failure, only a few lost braking force, usually can still brake in hoist, if there is damage to the hydraulic station and hydraulic system, the brake device can automatically brake

4. Good commonality, disc brake has a lot of parts are common, and different hoisting machine can match with different quantity and different types of disc brake

5. Simple structure easy to maintenance

Hydraulic station of JKM/JKMD type multi-rope mine friction hoist: 

Hydraulic station is an important safety and control components of mine hoist, with disc brake, they compose into a complete set of brake system. Its performance and quality directly affects the mine production and equipment service life. This hydraulic system has specialized designing and manufacturing for mine hoist. It use the domestic high-quality hydraulic element, auxiliary parts, hydraulic system adopts the integrated circuit block structure,   the overall structure is advanced, reasonable, reliable, and easy to maintenance.

Features:

1. Can provide different oil pressure value pressure oil for disc brake, in order to obtain different braking torque.

2. Under a state of emergency, can make brake oil pressure rapidly to the setting in advance of a certain value, after a time delay, all the brake oil pressure quickly return to zero, the brake to achieve full braking state.