CN215733900U

CN215733900U - Switched reluctance speed-regulating traction motor for mine explosion prevention

Info

Publication number: CN215733900U
Application number: CN202122065114.2U
Authority: CN
Inventors: 靳飞; 阴天龙; 姜辉; 李铁良; 郭淑玲
Original assignee: Dalian Riqian Motor Co ltd
Current assignee: Dalian Riqian Motor Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-02-01
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a switched reluctance speed-regulating traction motor for mine explosion prevention, which comprises a base, wherein a front end cover and a rear end cover are respectively arranged at two ends of the base, the front end cover and the rear end cover are both connected with a main shaft through bearings, a rotor is sleeved on the main shaft and positioned in a stator, the stator is fixed on the inner wall of the base, a reluctance type rotary transformer is arranged at the non-shaft extension end of the main shaft, the reluctance type rotary transformer is fixed on the rear end cover, a junction box is nested outside the rear end cover, an explosion-proof type wiring terminal connected with the stator is arranged inside the junction box, and an A1 explosion-proof cable leading-in device and an A5 explosion-proof cable leading-in device are connected to the lower part of the junction box. The motor has a larger motor utilization coefficient, the structure is simple, and no winding in any form is arranged on the rotor; the stator is provided with only simple concentrated windings, the end parts are short, and no interphase jumper wire exists. The method has the characteristics of few manufacturing procedures, low cost, reliable work, small maintenance amount and the like.

Description

Switched reluctance speed-regulating traction motor for mine explosion prevention

Technical Field

The utility model relates to the field of manufacturing of mining equipment, in particular to a switched reluctance speed-regulating traction motor for mine explosion prevention.

Background

The motor for mine explosion prevention is assembled on a large-scale coal mining machine and used for driving a turntable, a speed reducer and a pump, so that the coal mining machine can realize special coal mining and drilling functions such as automatic drill feeding, automatic drill descending and the like, and the motor is suitable for transmission sources of various machines. The series of motors are of a circular structure, the utilization rate of the internal space of the stator is high, and the rotor is of a laminated type, can be used for supplying power to a silicon controlled rectifier power supply and can be used under the working condition that the pulsating current and the load change are large. However, the existing motor is restricted in some explosive environments, for example, when the motor is not in a well in a ventilation environment and works under overload for a long time, the temperature rise of the motor can be increased rapidly, the loss of the motor is increased therewith, and meanwhile, the aging speed of an internal insulating material can be greatly increased, so that the service life of the motor is seriously threatened, and the potential safety hazard is increased.

SUMMERY OF THE UTILITY MODEL

To current motor under the abominable condition of ventilation situation, there is the problem that the temperature rise is fast and the loss is high, this application provides one kind can satisfy explosion-proof needs, can be again at the novel motor of cooling environment safe operation under unfavorable condition.

In order to achieve the purpose, the technical scheme of the application is as follows: the utility model provides a mine is explosion-proof with switched reluctance speed governing traction motor, includes the frame both ends set up front end housing and rear end cap respectively, front end housing and rear end cap all link to each other with the main shaft through the bearing, the cover has the rotor on the main shaft, and this rotor is located the stator, the stator is fixed on the frame inner wall the magnetic resistance formula resolver is installed to the non-axle extension end of main shaft, magnetic resistance formula resolver is fixed on the rear end cap, the outside nested terminal box of this rear end cap, the inside flame proof type binding post that links to each other with the stator that is equipped with of terminal box has A1 explosion-proof cable induction system and A5 explosion-proof cable induction system in the terminal box sub-unit connection.

Furthermore, the rotor adopts a salient pole rotor, the stator adopts a salient pole stator, namely a double salient pole type structure, and the number of teeth of the stator and the number of teeth of the rotor are not equal.

Furthermore, the stator is provided with concentrated windings, and two windings opposite to each other in the diameter direction are connected in series to form one phase; the rotor is constructed from laminations.

Furthermore, all processing threaded hole on the boss of terminal box both sides, be connected with A1 explosion-proof cable leading-in device in the threaded hole, A1 explosion-proof cable leading-in device includes butyronitrile rubber circle, clamp plate packing ring and screws up the barrel, and the butyronitrile rubber circle that is located the threaded hole the innermost links to each other with screwing up the barrel through the clamp plate packing ring, is equipped with the screw thread on screwing up the barrel outer wall.

Furthermore, the upper side and the lower side of the tightening cylinder are provided with fixing grooves, clamping plates are paved in the fixing grooves, compression bolts penetrate through the clamping plates and are matched with nuts to fix cables, and the end part of the tightening cylinder is horn-shaped.

Furthermore, two threaded holes are processed in a boss in the middle of the junction box, an A5 explosion-proof cable leading-in device is connected in each threaded hole, the A5 explosion-proof cable leading-in device comprises a nitrile rubber ring, a pressing plate gasket and a screwing barrel, the nitrile rubber ring located at the innermost part of the threaded hole is connected with the screwing barrel through the pressing plate gasket, and threads are arranged on the outer wall of the screwing barrel.

Furthermore, the engine base comprises an outer water jacket and an inner water jacket, a water channel of the inner water jacket is spiral, one end of the inner water jacket is provided with a water inlet, and the other end of the inner water jacket is provided with a water outlet.

Furthermore, a low-voltage wiring terminal connected with the reluctance type rotary transformer is arranged in the junction box.

As a further step, the inner water jacket is formed in one step by machining.

As a further step, two ends of the base are respectively connected with the front end cover and the rear end cover through O-shaped sealing rings, and the rear end cover and the junction box form a sealing cavity through the O-shaped sealing rings.

Due to the adoption of the technical scheme, the utility model can obtain the following technical effects: this application frame internal and external water jacket can distribute away the heat that produces when the motor operation through the circulation of water, is equipped with into on the frame, delivery port, makes things convenient for the access of water pipe and the inflow, the outflow of cooling water. The rotor is not provided with any type of winding, the stator is only provided with simple concentrated winding, and no interphase jumper wire is arranged, so that the motor has the characteristics of less manufacturing procedures, low cost, reliable work, small maintenance amount and the like. The explosion-proof cable lead-in device effectively protects the cable from being damaged and broken when stressed. The motor is high in safety and can be used in the area with flammable and explosive gas around.

Drawings

FIG. 1 is a schematic axial section view of a switched reluctance speed-regulating traction motor for mine explosion protection;

FIG. 2 is a side view of a switched reluctance variable speed traction motor for mine explosion prevention;

the sequence numbers in the figures illustrate: 1. a machine base; 2. a front end cover; 3. a rear end cap; 4. a junction box; 5. A rotor; 6. a main shaft; 7. a stator; 8. a reluctance type resolver; 9. the flame-proof type wiring terminal; 10. a1 explosion-proof cable leading-in device; 11. an O-shaped sealing ring; 12. a nitrile rubber ring; 13. a platen washer; 14. an inner water jacket; 15. a5 explosion-proof cable leading-in device; 16. a water channel.

Detailed Description

The embodiments of the present invention are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

As shown in figures 1-2, the motor is a mine explosion-proof motor special for coal mines and can be safely used in an explosive environment. The motor comprises a base (1), a front end cover (2) and a rear end cover (3) which are respectively arranged at two ends of the base (1), a junction box (4), a rotor (5) and a main shaft (6); the magnetic resistance type rotary transformer is characterized by further comprising a stator (7) arranged inside the machine base (1) and a magnetic resistance type rotary transformer (8) arranged at a non-shaft extension end of the main shaft (6), a junction box (4) is nested outside the rear end cover (3), the junction box (4) has functions and can form a sealing cavity with the rear end cover (3) through an O-shaped sealing ring (11), and the waterproof grade of IP67 can be achieved. And an explosion-proof wiring terminal (9) is arranged in the junction box, and the lower part of the junction box is connected with an A1 explosion-proof cable leading-in device (10) and an A5 explosion-proof cable leading-in device (15).

Preferably, the rotor (5) and the stator (7) both adopt a salient pole rotor and a salient pole stator, namely, a double salient pole type structure, the numbers of teeth of the stator and the rotor are not equal, the stator is provided with simple concentrated windings, and two windings opposite in the diameter direction are connected in series to form one phase. The rotor is composed of laminated sheets, has no winding, commutator, collecting ring, etc. in any form, and is completely different from the traditional AC/DC motor in torque and rotating speed formed by the interaction between magnetic fields generated by the winding currents of the stator and the rotor.

Preferably, the A1 explosion-proof cable leading-in device (10) and the A5 explosion-proof cable leading-in device (15) both comprise a nitrile rubber ring and a pressing plate gasket ring, the nitrile rubber ring and the pressing plate gasket ring are mainly used for fixing cables, after the cables enter the device, the barrel is screwed in a rotating mode, the nitrile rubber ring (12) and the pressing plate gasket ring (13) are gradually pressed, the cables penetrating through the nitrile rubber ring and the pressing plate gasket ring are fixed, and the cables are protected from being damaged and broken when stressed. The A1 explosion-proof cable leading-in device is used for fixing a relatively thick cable, and the cable is connected with an explosion-proof type wiring terminal; the A5 explosion-proof cable leading-in device is used for fixing a thin cable, such as a signal wire, a temperature wire and a power wire of a reluctance type rotary transformer, and the thin cable is connected with a low-voltage wiring terminal.

Preferably, the base comprises an outer water jacket and an inner water jacket, the water channel of the inner water jacket (14) is spiral, and the base is characterized by small water flow resistance and essential difference from the water jacket in the traditional water-cooled motor. The inner water jacket of the motor is formed in one step by machining through a machine tool, the deformation can be controlled, the leakage and other adverse characteristics can be prevented, and the resistance of water flowing is reduced to the minimum through the unique spiral water channel. The heat dissipation capacity of the motor is greatly improved. The depth of the water channel of the inner water jacket is preferably 13mm, the width of the water channel of the inner water jacket is preferably 20mm, the water channel is more stable when flowing, the water flow is more smooth, the pressure of the inner cavity of the machine base is reduced, the water drainage capacity is increased, and the safety factor of the motor is improved. The water circulation is used for cooling, so that the noise is reduced when the motor runs, the invalid magnetic resistance is reduced, the efficiency of the motor can be improved by about 10 to 15 percent, the energy loss is saved, and the running power of the whole motor can be reduced. The water outlet end of the water pump is connected with the water inlet of the base through a hose, the water outlet of the base is connected with the water tank, after the water pump is powered on, water enters the base from the water tank under the driving of pressure to form a reciprocating motion, the flow of 2.2 square meters per minute can be achieved according to the power and the pressure of the pump, heat generated by the motor is taken away instantly, and the temperature rise is reduced efficiently.

The motor can obtain a large starting torque, and when the starting torque reaches 200% of the rated torque, the starting current is only 50% of the rated current, so the starting torque is large and the starting current is small. The temperature rise degree under low speed is lower than that under rated working condition, and the problem of heating of the motor under the condition of variable frequency speed regulation and low speed operation does not exist. In addition, the maximum rotating speed is not limited by the number of poles like an alternating current motor, the maximum rotating speed can be flexibly set, and when a braking unit and braking power meet requirements, the energy conversion of start-stop and positive and negative rotation can be more than hundreds of times per hour, and the start-stop and the positive and negative rotation can be frequently carried out, and the positive and negative rotation can be frequently carried out. Therefore, the motor can maintain the reliability of the performance of the motor in response to the working environment in any severe mine conditions.

The motor is subjected to multiple tests, namely, the highest positive pressure test, namely, all pressure relief ports of the base are closed when the motor is not electrified, compressed air is filled to reach the maximum positive pressure value of 250Pa for 2 minutes, and after the test, whether the phenomena of fracture, permanent deformation, extrusion of a sealing gasket, dislocation and the like exist at all parts of the motor is checked; and in the lowest positive pressure detection test, the motor is ensured to be explosion-proof by cutting off an external power supply of the motor or reducing the static residual pressure of protective gas in the motor to ensure that the pressure value is not lower than 50Pa so as to prevent inflammable and explosive gas from entering the interior to cause danger. Therefore, the motor can be operated in an explosive area to ensure the safety and the reliability.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a mine is explosion-proof with switched reluctance speed governing traction motor, includes the frame both ends set up front end housing and rear end cap respectively, front end housing and rear end cap all link to each other with the main shaft through the bearing, the cover has the rotor on the main shaft, and this rotor is located the stator, the stator is fixed on the frame inner wall the non-shaft extension end of main shaft installs reluctance type resolver, reluctance type resolver is fixed on the rear end cap, the outside nested terminal box of this rear end cap, its characterized in that, the inside flame proof type binding post that links to each other with the stator that is equipped with of terminal box is connected with A1 explosion-proof cable draw-in device and A5 explosion-proof cable draw-in device in the terminal box sub-unit.

2. The switched reluctance speed-regulating traction motor for mine explosion protection according to claim 1, wherein the rotor is a salient pole rotor, the stator is a salient pole stator, i.e. a double salient pole type structure, and the number of teeth of the stator and the rotor is not equal.

3. The switched reluctance speed-regulating traction motor for mine explosion protection according to claim 1, wherein the stator is provided with concentrated windings, and two windings which are opposite in the diameter direction are connected in series to form one phase; the rotor is constructed from laminations.

4. The switched reluctance speed-regulating traction motor for mine explosion prevention according to claim 1, wherein threaded holes are processed on bosses on both sides of the junction box, an A1 explosion-proof cable lead-in device is connected in the threaded holes, the A1 explosion-proof cable lead-in device comprises a nitrile rubber ring, a pressure plate gasket and a tightening barrel, the nitrile rubber ring positioned at the innermost part of the threaded hole is connected with the tightening barrel through the pressure plate gasket, and threads are arranged on the outer wall of the tightening barrel.

5. The switched reluctance speed-regulating traction motor for mine explosion protection as claimed in claim 4, wherein the tightening cylinder has fixing slots on its upper and lower sides, clamping plates are laid in the fixing slots, a pressing bolt passes through the clamping plates and cooperates with a nut to fix the cable, and the end of the tightening cylinder is flared.

6. The switched reluctance speed-regulating traction motor for mine explosion prevention according to claim 1, wherein two threaded holes are processed on the boss in the middle of the junction box, an A5 explosion-proof cable lead-in device is connected in each threaded hole, the A5 explosion-proof cable lead-in device comprises a nitrile rubber ring, a pressure plate gasket and a tightening barrel, the nitrile rubber ring positioned at the innermost part of the threaded hole is connected with the tightening barrel through the pressure plate gasket, and threads are arranged on the outer wall of the tightening barrel.

7. The switched reluctance speed-regulating traction motor for mine explosion protection according to claim 1, wherein the base comprises an outer water jacket and an inner water jacket, the water channel of the inner water jacket is spiral, one end of the inner water jacket is provided with a water inlet, and the other end of the inner water jacket is provided with a water outlet.

8. The switched reluctance speed-regulating traction motor for mine explosion-proof according to claim 1, wherein a low voltage terminal connected to the reluctance type rotary transformer is further provided in the terminal box.

9. The switched reluctance speed-regulating traction motor for mine explosion-proof according to claim 7, wherein the inner water jacket is formed in one step by machine tool machining.

10. The switched reluctance speed-regulating traction motor for mine explosion protection as claimed in claim 1, wherein the two ends of the base are connected with the front end cover and the rear end cover respectively through O-ring seals, and the rear end cover forms a sealed cavity with the junction box through the O-ring seals.