CN211644284U

CN211644284U - Mine hoist

Info

Publication number: CN211644284U
Application number: CN202020026671.6U
Authority: CN
Inventors: 冯献尚; 路飞; 和卫国
Original assignee: Shandong Taiding New Machinery Technology Co ltd
Current assignee: Shandong Taiding New Machinery Technology Co ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-10-09
Anticipated expiration: 2030-01-07

Abstract

The utility model discloses a mine winder mainly solves and is the big scheduling problem of current device weight. This product includes the chassis, install power supply module, cylinder, fan and stopper on the chassis, install stator module and rotor subassembly and the front end and the rear end of cylinder install front end housing and back fender lid respectively in the cylinder, stator module includes stator core, stator winding and wheel hub, stator core includes the hollow shaft and the hollow shaft adopts interference fit's mode to link to each other with wheel hub, wheel hub passes through the cooperation of bearing and bearing housing to be fixed mutually with front end housing and back fender lid respectively, power supply module is connected with fan, stopper and cylinder electricity respectively. The stator core is reasonable in design, the hollow shaft is adopted as the shaft in the stator core, so that the mechanical strength and the structural rigidity of the stator core are high, the weight of the stator core is reduced, the hollow shaft can be forged in a segmented mode, the production cost is reduced, and the application prospect is wide.

Description

Mine hoist

Technical Field

The utility model relates to an ore mining field specifically is a mine winder.

Background

Mine hoist is important equipment in mine, it undertakes the lifting of mineral, personnel up and down, material and equipment transport, is the junction equipment that links the well-down with ground, therefore also known as the "throat equipment" in mine. Therefore, the reliability and stability of the operation directly influence whether the mine operation can be carried out smoothly, and the lifting capacity directly determines the mine yield. The traditional mine hoist system mainly comprises a driving motor, a speed reducer, a coupling and other connecting equipment, a steel wire rope winding drum, control equipment and the like, wherein the parts are mainly positioned in a ground machine room, and in addition, a head sheave, a container, a counterweight and the like are also arranged, and the parts are positioned at a well mouth or underground. Through the development of recent decades, the drive system and the automation control process of the mine hoist are continuously improved. From a winding type to a multi-rope friction type, from a speed-changing driving through a speed reducer to a direct connection structure and then to an internal structure, from an asynchronous motor speed-reducing driving to a direct current motor and an electrically excited synchronous motor driving direct driving and then to a permanent magnet synchronous motor driving, the system driving structure is gradually simplified, and the control performance is continuously improved. According to the system driving structure, the mine hoist successively goes through the following three stages:

1. the wound AC asynchronous motor is driven by a speed reducer

The dragging system of AC winding asynchronous motor is the first stage of electric dragging development of mine hoist, and the cage asynchronous motor has difficulty in meeting the requirement of mine hoist in starting and speed regulating performance. The winding asynchronous motor has small starting current and large starting torque, and can regulate speed within a certain range. However, the efficiency is low, the method is not suitable for frequent starting, the speed regulation range is narrow, and the method belongs to step speed regulation. Due to the presence of slip rings and brushes, the system mounting structure is complex. The transmission structure is as follows: the motor is connected to the roller through a speed reducer and a coupler. The axial line from the motor to the input stage of the speed reducer and the axial line from the output stage of the speed reducer to the roller are connected by the coupling, and the requirements on manufacturing precision and installation precision are high. Excessive wear or foundation change after long-term operation can cause the accidents of tooth damage or bearing burning. The mine hoist in the last 5060 years of China mostly adopts the driving mode.

2. Motor and winding drum direct-connected structure

The direct connection structure is divided into a coupling connection structure and a motor rotor suspension type structure. Compared with the speed reducer existing in the first stage, the speed reducer in the first stage is simplified due to the fact that a speed reducing mechanism is omitted, the driving characteristic of low speed and high torque required by a load winding drum is directly met by the motor, and the traditional asynchronous motor cannot be made into a multi-pole low-speed structure, so that the direct-current motor replaces the structure of an asynchronous motor speed reducer and becomes one of the most main driving modes in the 60-70 years of the last century. According to different connection modes of the motor and the winding drum, two driving modes of coupling connection and motor rotor suspension are adopted successively. Originally, a direct current motor and a winding drum are used as two independent devices, and are respectively provided with respective supporting bearings, and the connection of the direct current motor and the winding drum is completed through a coupler, so that a three-fulcrum or four-fulcrum bearing seat is formed, and the problem of uncertainty is caused, and particularly, the installation and the centering of the large-scale equipment are difficult. Because assembly errors cannot be avoided, the problem of stress concentration exists inside the power transmission shafting, and hidden danger is brought to safe operation of the system. Just because of the existence of the problems, the suspended rotor type two-shaft system mine hoist appears in the 50 th century, the motor does not have an independent supporting bearing, the motor rotor and the winding drum share one main shaft, the suspended rotor type direct connection structure is characterized in that a coupling and other mechanisms are omitted, and the system is simplified. Not only has high efficiency, but also fundamentally avoids the problem of immobility of the main shaft supported by two points. However, the uniformity of the air gap is difficult to ensure under various forces inside the motor. Once the air gap is eccentric due to factors such as unilateral magnetic tension and the like, the performance of the motor is seriously influenced, and the safe operation of the system is threatened. Therefore, in order to ensure the safety of the system, the hoist of the two bearing shafting should have enough rigidity, and the following problems must be considered: spindle stiffness, bearing seat stiffness, bearing play, stator stiffness, foundation stiffness, stator deformation during operation due to heating and additional forces acting on the foundation, ground assembly inaccuracy, and the like.

In the direct-connected structure of the motor and the winding drum, a magnetic field adjustable direct-current motor speed regulating system supplied by a direct-current generator set, a direct-current motor speed regulating system supplied by thyristor rectification and an electric excitation synchronous motor driving system regulated by alternating-current and alternating-current frequency conversion appear in the motor driving mode in sequence.

The rotation speed of the winding drum of the mine hoist is generally low, and for the direct-connected structure, the driving motor is required to meet the requirements of low speed, large torque and excellent speed regulation characteristic. The direct current motor speed regulating system is simple, the technology is mature, and the direct current motor speed regulating system becomes the first choice of the direct connection type hoister. The mechanical characteristic of the direct current motor is a straight line, the speed regulation performance is better, and the work is more reliable. The generator set-direct current motor dragging system has the advantages that: the overload capacity is strong, the required equipment is a conventional shaped product, the supply is easy, the operation is reliable, the technical requirement is not high, and the power grid outside the system cannot be harmfully influenced; the disadvantages are that: the efficiency is low, and is only about 75% on average; the speed regulation range cannot be too large due to the influence of residual magnetism; complex and huge equipment, large occupied area and the like. Such systems have been phased out over the last 60 th century.

In the 20 th century, from the beginning of the 60 s to the 70 s, in the period of approximately 20 years, with the rapid development of power electronic technology, the direct current drive system powered by a thyristor rectifier device is rapidly developed and popularized. Compared with a direct-current motor system powered by a direct-current generator set, the system has greatly improved compactness and control characteristics. However, the existence of the brush and the commutator of the direct current motor cannot be avoided, and the system has poor maintainability and low efficiency. Cost is high for large capacity thyristor converter systems. With the development of stationary frequency conversion devices over the 80 s, a way was opened up for replacing direct current motors with high-power speed-adjustable synchronous motors in most application fields. The synchronous motor is not provided with a commutator, has a compact structure compared with a direct current motor, has higher efficiency, and has obvious advantages compared with a cantilever friction type hoister driven by the direct current motor in terms of economic benefit and product cost. Therefore, the electrically excited synchronous motor driving system adopting the ac-ac variable frequency speed control system gradually became the mainstream of the driving mode of the high-power hoister in the 80 s. And because the structure of the electric excitation synchronous motor is simpler, the installation flexibility is good, and the possibility is provided for the development of the elevator to the third generation of built-in type.

3. Built-in driving structure of electric excitation synchronous motor

The built-in driving structure integrally designs the external rotor electric excitation synchronous motor and the winding drum, the motor stator is fixed on a main shaft of the winding drum, the motor is integrally installed inside the winding drum, a steel wire rope liner is installed on the outer side of the winding drum, and a T-shaped steel structure is additionally installed on the inner side of the winding drum to fix a motor rotor magnetic pole. The system adopts a two-shaft system structure, and the bearings are positioned on two sides of the motor and the winding drum, so that the stress is uniform, the problem of statically indeterminate multi-shaft systems is avoided, the internal stress condition of a mechanical part is fundamentally improved, the deflection and assembly error of the shaft are obviously reduced, and the air gap deviation is reduced, thereby ensuring the safe operation of the elevator. The first motor built-in elevator in the world was produced in 1988, and its main driving motor, namely an electrically excited synchronous motor, was installed in the new houmbeck well of haus alton mine, westerfaren mining, germany.

Although the existing mine hoist can meet the use requirements of people, the weight is large and the mechanical strength cannot meet the expectation of people.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a mine hoist to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

the utility model provides a mine hoist, which comprises a base frame, install power supply module, the cylinder on the chassis, fan and stopper, install stator module and rotor subassembly and front end housing and back fender lid are installed respectively to the front end and the rear end of cylinder in the cylinder, stator module includes stator core, stator winding and wheel hub, stator core includes the hollow shaft and the hollow shaft adopts interference fit's mode with wheel hub to link to each other, wheel hub passes through the cooperation of bearing and bearing housing and fixes mutually with front end housing and back fender lid respectively, power supply module respectively with the fan, stopper and cylinder electricity are connected, the axle with in the stator core adopts the hollow shaft in this product, make the mechanical strength and the structural rigidity of product high, the weight of product has been alleviateed, the hollow shaft can be forged in the segmentation, and production cost is reduced.

As a further scheme of the embodiment of the utility model: the bearing outer cover is installed on the outer side of the bearing, the bearing inner cover is installed on the inner side of the bearing, and the bearing sleeve, the bearing outer cover and the bearing inner cover form a closed space which can protect the bearing.

As a further scheme of the embodiment of the utility model: the bearing adopts a self-aligning roller bearing, is easy to purchase in the market, is convenient to install and replace and has good use effect.

As a further scheme of the embodiment of the utility model: the brake adopts a disc brake, is convenient to operate and has small volume.

As a further scheme of the embodiment of the utility model: the underframe is made of stainless steel materials, so that the processing is convenient and the service life is long.

Compared with the prior art, the utility model discloses the beneficial effect of embodiment is:

the stator core is reasonable in design, the hollow shaft is adopted as the shaft in the stator core, so that the mechanical strength and the structural rigidity of the stator core are high, the weight of the stator core is reduced, the hollow shaft can be forged in a segmented mode, the production cost is reduced, and the application prospect is wide.

Drawings

Fig. 1 is a cross-sectional view of a mine hoist.

Fig. 2 is a side view of the mine hoist.

Fig. 3 is a schematic view of the mating structure of the hollow spindle and hub of the mine hoist.

Wherein: 1-hollow shaft, 2-hub, 3-bearing outer cover, 4-bearing sleeve, 5-bearing, 6-bearing inner cover, 7-front end cover, 8-roller, 9-rotor assembly, 10-stator assembly, 11-rear baffle cover, 12-brake, 13-chassis, 14-fan and 15-power supply assembly.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Example 1

A mine hoist comprises a chassis 13, a power supply assembly 15, a roller 8, a fan 14 and a brake 12 are mounted on the chassis 13, a stator assembly 10 and a rotor assembly 9 are mounted in the roller 8, a front end cover 7 and a rear baffle cover 11 are respectively mounted at the front end and the rear end of the roller 8, the stator assembly 10 comprises a stator core, a stator winding and a hub 2, the stator core comprises a hollow shaft 1, the hollow shaft 1 is connected with the hub 2 in an interference fit mode, the hub 2 is respectively fixed with the front end cover 7 and the rear baffle cover 11 through the matching of a bearing 5 and a bearing sleeve 4, the power supply assembly 15 is respectively electrically connected with the fan 14, the brake 12 and the roller 8, a shaft in the stator core is a hollow shaft 1 in the product, the mechanical strength and the structural rigidity of the product are high, the weight of the product is reduced, the hollow shaft 1 can be forged in sections, and the production cost is reduced.

In order to protect the bearing 5, the outer bearing cover 3 is installed on the outer side of the bearing 5, the inner bearing cover 6 is installed on the inner side of the bearing 5, and the bearing sleeve 4, the outer bearing cover 3 and the inner bearing cover 6 form a closed space, so that the service life of the bearing 5 is prolonged.

Furthermore, the bearing 5 adopts a self-aligning roller bearing, is easy to purchase in the market, is convenient to install and replace and has good use effect.

Example 2

For the convenience of operation, the brake 12 is a disk brake and has a small volume.

Furthermore, the bottom frame 13 is made of stainless steel materials, so that the processing is convenient, and the service life is long.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. 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 hoist, including chassis (13), install power supply module (15) on chassis (13), cylinder (8), fan (14) and stopper (12), install stator module (10) and rotor module (9) in cylinder (8) and front end housing (7) and back fender lid (11) are installed respectively to the front end and the rear end of cylinder (8), stator module (10) are including stator core, stator winding and wheel hub (2), a serial communication port, stator core includes hollow shaft (1) and wheel hub (2) adopt interference fit's mode to link to each other, wheel hub (2) are fixed mutually with front end housing (7) and back fender lid (11) respectively through the cooperation of bearing (5) and bearing housing (4), power supply module (15) respectively with fan (14), stopper (12) and cylinder (8) electricity are connected.

2. The mine hoist as claimed in claim 1, characterized in that the bearing outer cover (3) is mounted on the outer side of the bearing (5), the bearing inner cover (6) is mounted on the inner side of the bearing (5), and the bearing housing (4), the bearing outer cover (3) and the bearing inner cover (6) form a closed space.

3. The mine hoist of claim 1 or 2, characterized in that the bearing (5) is a self-aligning roller bearing.

4. The mine hoist of claim 1, characterized in that the brake (12) is a disc brake.

5. The mine hoist of claim 1 or 4, characterized in that the chassis (13) is made of a stainless steel material.