CN106602795A - Double-motor driving structure for coal mining machine rocker arm - Google Patents

Abstract

The invention belongs to the technical field of motors, and particularly discloses a double-motor driving structure for a coal mining machine rocker arm. The double-motor driving structure is characterized by comprising two small-size asynchronous motors arranged at two sides of an output shaft, wherein a torque axis of each asynchronous motor drives the output shaft through a planet gear, and the output shaft drives a cutting part through a reducing mechanism; cooling water channels of cooling structures of the two asynchronous motors are connected in series, and each cooling structure comprises an inner water jacket, an outer water jacket, and a baffle rib water inlet; and the outer water jacket has a square structure, the inner water jacket has a round structure, and the side length of the cross section of the outer water jacket is smaller than the diameter of the inner water jacket. The double-motor driving structure disclosed by the invention has the following advantages: after adoption of the double-motor driving structure and the square inner and outer water jacket structures, the size of a rocker arm is reduced to adapt to a mining condition of a low coal seam; the operation performances of the motors are improved, and the service lives of the motors are prolonged; and the maintenance time is shortened, and halt production risks are reduced, so that use requirements of most domestic coal mines are met.

Description

A kind of rocker arm of coal mining machine double-motor driving structure

Technical field

The invention belongs to motor technology field, specifically a kind of rocker arm of coal mining machine bi-motor drive Dynamic structure.

Background technology

Past, girdle is treated coldly because the low exploitation difficulty of cost high benefit is big, at the same also because Its abundant reserves and preferable ature of coal, are born in mind constantly by people, become " food in coal reserves It is tasteless, hesitate to discard " " chicken ribs ".With the increase of coal mining intensity, China is near The coal-producing areas more than half already belong to the recoverable reserves of scarcity of resources area, high seam and medium-thickness seam Increasingly atrophy.And adopt thickness and lose thin mining type, coal resources waste is not only caused, also stay Many potential safety hazards.Existing coal-winning machine adopts single Motor drive, due to requiring that power is larger, Therefore, volume is accordingly also larger；Further, since work under bad environment, ventilation condition and cooling Condition is bad, so motor must adopt cooling structure, and existing cooling structure is typically adopted The core of motor is enclosed within water jacket with the inside and outside water jacket of ring-type, is so virtually increased again The volume of motor, is not suitable for the exploitation of girdle；So research and development low seam mining machinery of new generation Cutting motor just more seems extremely urgent, is also the important topic that we face.When Motor is in girdle use, it is desirable to which coal-winning machine fuselage is short will but enough power, with suitable The undulation in coal seam is answered, while there are enough coals excessively and mistake machine spatial altitude.Purport of the present invention With reference to concrete engineering actual conditions, with the general principle of design of electrical motor concrete application ring is combined Border, develops the motor-driven mechanism of suitable China coalfield thin seam mining at this stage, replenishes Current blank of the thin seam mining without heavy-duty motor.Therefore, it is intended that there is one kind can be Under confined space structure, as far as possible many raising driving power and digging efficiency bring considerable economy The driving structure of benefit and social benefit.

The content of the invention

For above-mentioned technical problem, the invention provides a kind of rocker arm of coal mining machine bi-motor Driving structure.Concrete technical scheme is as follows：

A kind of rocker arm of coal mining machine double-motor driving structure, including being arranged on two of output shaft both sides Small size asynchronous machine, the torque axis per asynchronous motors passes through planet gear drives output shaft, Output shaft drives cutting units by reducing gear；The cooling water of the cooling structure of two asynchronous machines Road is in series, and the cooling structure includes inner water sleeve, outer water jacket, baffling muscle water inlet；Including Two small size asynchronous machines of output shaft both sides are arranged on, the torque axis per asynchronous motors leads to Planet gear drives output shaft is crossed, output shaft drives cutting units by reducing gear；Two asynchronous The cooling water channel of the cooling structure of motor is in series, and the cooling structure includes inner water sleeve, outer water Set, baffling muscle, water inlet；The outer water jacket is square structure, and inner water sleeve is circular configuration, Diameter of the section length of side of the outer water jacket less than inner water sleeve.

It is an advantage of the invention that：After double-motor driving structure and square outer jacket structure for water, reduce Rocking arm volume, has adapted to the mining conditions of girdle；The runnability of motor is improved, is increased The service life of motor is added；Maintenance time is reduced, stopping production risk is reduced, so as to suitable The use demand in China overwhelming majority colliery is answered.

Description of the drawings

Fig. 1 is the rocker arm of coal mining machine double-motor driving structure schematic diagram of the present invention；

Fig. 2 is the square baffling cooling structure and driving structure schematic diagram of the present invention；

Fig. 3 is the A areas enlarged drawing of Fig. 2；

Wherein：1 is stator；2 is rotor；3 is torque axis；4 is planetary gear；5 is defeated Shaft；6 is reducing gear；7 is cutting units；8 is the mouth of a river；9 is inner water sleeve；10 are folding Stream muscle；11 is mozzle；12 is outer water jacket.

The invention has the beneficial effects as follows：After double-motor driving structure and square inside and outside jacket structure for water, Rocking arm volume is reduced, the mining conditions of girdle have been adapted to；Improve the maneuverability of motor Can, increased the service life of motor；Maintenance time is reduced, stopping production risk is reduced, So as to adapt to the use demand in China overwhelming majority colliery.

Specific embodiment

Below in conjunction with drawings and Examples, the present invention will be further described：

This invention is a kind of rocker arm of coal mining machine double-motor driving structure, stator 1 as shown in Figure 1, Reducing gear 6 shown in rotor 2, torque axis 3, planetary gear 4, output shaft 5 and Fig. 2, Cutting units 7 constitutes a whole set of machine driven system；And the mouth of a river 8, inner water sleeve as shown in Figure 2 9th, baffling muscle 10, mozzle 11, outer water jacket 12 constitute a set of square motor baffling cooling system System；The two complements each other, and defines a whole set of rocker arm of coal mining machine double-motor driving structure.

As Figure 1-Figure 2, the present invention includes being arranged on two small sizes of output shaft both sides Asynchronous machine, the torque axis per asynchronous motors is by planet gear drives output shaft, output shaft Cutting units is driven by reducing gear；The cooling water channel of the cooling structure of two asynchronous machines is mutually gone here and there Connection, the cooling structure includes inner water sleeve, outer water jacket, baffling muscle, water inlet；The outer water Cover for square structure, inner water sleeve is circular configuration, the section length of side of the outer water jacket is less than interior water The diameter of set.

Two motor stators drive rotor, rotor to pass through spline connection driving torque after being powered Axle, two torque axis make a concerted effort for moment of torsion to be transferred to output shaft by planetary gear, and in practice Jing is normal The situation that two motors drive a load simultaneously is had, because asynchronous machine has in itself certain Flexibility, can automatically adjust torque rotating speed according to loading condition each other, it is possible to realize synchronous. Transmit power to cutting units after reducing gear speed governing from output shaft again.When motor is at certain moment During overload, torque axis can rupture in time, and effective protection rotor is injury-free, only need to change Torque axis can continue to produce, and because being double-motor driving structure, even if in a motor When being damaged, also semi-load can be kept to run, it is long to solve maintenance time, off-time length etc. Problem, improves coal mining efficiency, increased the performance of enterprises；As shown in Fig. 2 two electricity Motivation is the square baffling cooling structure of integral type, when motor is connected with the cooling water of certain pressure When, cooling water will be flowed into by water inlet, by delivery port after being oriented to via baffling muscle, mozzle Flow out, along with itself cooling and the series connection of two motor water routes of baffling muscle, make the entering of two motors, Water outlet environment temperature keeps highly consistent, solves temperature during two motor cooling water circulations The big practical problem of degree gradient, improves service life.And the setting of square outer water jacket can ensure The radial dimension of motor will not increase.As shown in Fig. 2 water flows back and forth along vertical paper direction, The radial dimension of motor does not increase.

Claims (1)

1. a kind of rocker arm of coal mining machine double-motor driving structure, it is characterised in that：It is defeated including being arranged on Two small size asynchronous machines of shaft both sides, the torque axis per asynchronous motors passes through planet tooth Wheel drive output shaft, output shaft drives cutting units by reducing gear；Two asynchronous machines it is cold But the cooling water channel of structure is in series, and the cooling structure includes inner water sleeve, outer water jacket, baffling Muscle, water inlet；The outer water jacket is square structure, and inner water sleeve is circular configuration, the outer water Diameter of the section length of side of set less than inner water sleeve.