CN216198070U

CN216198070U - Multi-amplitude axial excitation coal rock crushing mechanism

Info

Publication number: CN216198070U
Application number: CN202122601165.2U
Authority: CN
Inventors: 刘春生; 刘延婷; 李德根; 任春平
Original assignee: Heilongjiang University of Science and Technology
Current assignee: Heilongjiang University of Science and Technology
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-04-05
Anticipated expiration: 2031-10-28

Abstract

The utility model provides a multi-amplitude axial excitation coal rock crushing mechanism which comprises a first shell, a second shell, a first vibration damping device, a second vibration damping device and a third vibration damping device, wherein the inner end of the first shell is connected with the inner end of the second shell; the transmission shaft is arranged in the first shell through a transmission shaft sliding bearing, and the head of the transmission shaft penetrates through the outer end of the first shell and is connected with the disc stacking cutter; the roller shaft of the roller is movably arranged in the first shell through a roller shaft bearing, the shell of the roller shaft bearing is fixed on the tail end of the transmission shaft, and a return spring is arranged between the shell of the roller shaft bearing and the inner side of the outer end of the first shell; the excitation wheel shaft of the excitation wheel is arranged in the second shell through an excitation wheel shaft bearing and an excitation wheel shaft tail end bearing; the excitation wheel shaft is vertical to the transmission shaft; the exciting wheel is connected with the hydraulic motor and meshed with the roller. The vibration exciting wheel has three forms, can realize multi-amplitude vibration excitation to crush the coal rock, and improves the crushing efficiency by more than 50 percent.

Description

Multi-amplitude axial excitation coal rock crushing mechanism

Technical Field

The utility model relates to the field of excavation equipment, in particular to a multi-amplitude axial excitation coal rock crushing mechanism.

Background

Coal is used as basic energy in China, is still accompanied with important roles along with the development of society, is predicted to be unchanged before 2050, is gradually increased in coal mining difficulty along with the increase of coal mining quantity in the process of tunneling of all-rock roadways, is continuously developed for coal mining industry, is also utilized for coal seams which are difficult to mine, and obviously improves the hardness of cut objects for the coal seams. The damage of cutting hard coal rocks to the traditional mining mechanical equipment cannot be ignored, and the mechanical equipment can be directly scrapped. Imbalance in mining scale is also a major cause of concern for safe and efficient production of coal. In order to solve the key technology of tunneling of all-rock roadways, a large number of studies are carried out by numerous scholars at home and abroad, and the coal rock with the compressive strength of less than 80MPa is solved. Due to the limitation of working places and mechanical equipment, a few cantilever type tunneling machines can cut rocks with hardness of over 80MPa at present, but the cutting effect is not ideal, and cutting teeth are seriously abraded when the cantilever type tunneling machines face harder rocks. Therefore, it is extremely urgent to enhance the cutting performance of the heading machine.

At present, the mining machinery in China has a larger gap compared with developed countries. Based on the cantilever type development machine widely applied to tunnel and coal mine tunnel development at present, on the basis of changing the experimental research of a loading mode and a cutter structure, the development of the multi-amplitude axial excitation coal rock crushing mechanism is necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multi-amplitude axial shock excitation coal rock crushing mechanism, which realizes multi-amplitude axial shock excitation crushing of coal rocks and effectively improves the coal rock crushing efficiency.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a multi-amplitude axial excitation coal rock crushing mechanism comprises a first shell and a second shell, wherein the inner end of the first shell is connected with the inner end of the second shell;

the transmission shaft is arranged in the first shell through a transmission shaft sliding bearing, and the head of the transmission shaft penetrates through the outer end of the first shell and is connected with the disc stacking cutter; the roller shaft of the roller is movably arranged in the first shell through a roller shaft bearing, the shell of the roller shaft bearing is fixed on the tail end of the transmission shaft, and a return spring is arranged between the shell of the roller shaft bearing and the inner side of the outer end of the first shell;

the excitation wheel shaft of the excitation wheel is arranged in the second shell through an excitation wheel shaft bearing and an excitation wheel shaft tail end bearing; the excitation wheel shaft is vertical to the transmission shaft; the exciting wheel is connected with the hydraulic motor and meshed with the roller.

The connecting lug at the outer end of the second shell is of a porous structure, the outer hole of the connecting shaft sleeve is arranged in the porous structure, the inner hole is arranged on the cylindrical surfaces of two sides of the connecting shaft, and the connecting shaft positioning sleeve and the shaft end check ring are arranged on the connecting shaft to realize the positioning and fastening of the connecting shaft.

On the transmission shaft, a sealing element seals the transmission shaft sliding bearing.

The first shell and the second shell are connected through a positioning pin, a bolt, a nut and a locking pad.

The roller shaft is arranged on a roller shaft bearing through an elastic snap ring I and an elastic snap spring II, and the roller shaft is also provided with a positioning sleeve III.

The excitation wheel shaft is arranged on a bearing at the tail end of the excitation wheel shaft through an elastic clamp spring III, and a positioning sleeve I, a positioning sleeve II and a positioning sleeve IV are further arranged on the excitation wheel shaft.

The utility model has the beneficial effects that:

1. the multi-amplitude axial excitation coal rock crushing mechanism is ingenious in structural design, the excitation wheel has three forms (1 period, 2 periods and 3 periods), multi-amplitude excitation crushing of coal rocks can be achieved, and crushing efficiency is improved by more than 50%.

2. The multi-amplitude axial excitation coal rock crushing mechanism is reliable in connection and convenient to maintain, and the coal crushing capacity is improved by more than 30% by using the cutter stack to vibrate and cut coal rocks.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention.

FIG. 2 is a cross-sectional view taken along line A-A of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples, but the present invention is not limited to these examples.

As shown in fig. 1 to 2, the multi-amplitude axial excitation coal rock crushing mechanism comprises a first shell 3 and a second shell 5, wherein the inner end of the first shell 3 is connected with the inner end of the second shell 5;

the transmission shaft 2 is installed in the first shell 3 through a transmission shaft sliding bearing 17, the head of the transmission shaft 2 penetrates through the outer end of the first shell 3 and is connected with the disc stacking cutter 1; a roller shaft 8 of the roller 4 is movably arranged in the first shell 3 through a roller shaft bearing 18, the shell of the roller shaft bearing 18 is fixed on the tail end of the transmission shaft 2, and a return spring 10 is arranged between the shell of the roller shaft bearing 18 and the inner side of the outer end of the first shell 3;

the excitation wheel shaft 9 of the excitation wheel 6 is arranged in the second shell 5 through an excitation wheel shaft bearing 13 and an excitation wheel shaft end bearing 23; the excitation wheel shaft 9 is vertical to the transmission shaft 2; the vibration exciting wheel 6 is connected with the hydraulic motor 7, and the vibration exciting wheel 6 is meshed with the roller 4.

Power is transmitted to the exciting wheel 6 by the hydraulic motor 7, so that an impact load is generated in the axial direction of the transmission shaft 2, the disc stacking cutter 1 is driven to vibrate along the axial direction, the exciting wheel 6 is divided into three forms, namely 1 period of the exciting wheel 6, 2 periods of the exciting wheel 6 and 3 periods of the exciting wheel 6, and therefore the disc stacking cutter 1 is excited to crush coal rocks along the axial direction in a multi-amplitude mode.

The connecting lug at the outer end of the second shell 5 is of a hole-shaped structure, the outer hole of the connecting shaft sleeve 27 is arranged in the hole-shaped structure, the inner hole is arranged on the cylindrical surfaces of two sides of the connecting shaft 29, and the connecting shaft positioning sleeve 30 and the shaft end retainer ring 28 are arranged on the connecting shaft 29, so that the positioning and fastening of the connecting shaft 29 are realized.

On the drive shaft 2, a seal 16 seals a drive shaft slide bearing 17.

The first housing 3 and the second housing 5 are connected by a positioning pin 19, a bolt 24, a nut 25, and a lock pad 26.

The roller shaft 8 is arranged on a roller shaft bearing 18 through an elastic snap ring I11 and an elastic snap spring II 12, and the roller shaft 8 is also provided with a positioning sleeve III 20.

The excitation wheel shaft 9 is arranged on a bearing 23 at the tail end of the excitation wheel shaft through an elastic clamp spring III 21, and a positioning sleeve I14, a positioning sleeve II 15 and a positioning sleeve IV 22 are further arranged on the excitation wheel shaft 9.

A plurality of through holes are uniformly distributed at the left end of the first shell 3, threads are arranged on the through holes, the length of the threads is smaller than the depth of the holes, and a plurality of return springs 10 are arranged in the holes. In the whole axial vibration process of the shell and the internal parts thereof, the return spring 10 is elastically deformed and compressed, the rigidity of the return spring 10 influences the vibration frequency, and the compression quantity influences the amplitude.

The first shell 3 has a circular through hole at the bottom for mounting a sliding bearing 17 of the transmission shaft.

Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model, and it is intended that the scope of the utility model be defined by the appended claims.

Claims

1. The multi-amplitude axial excitation coal rock crushing mechanism is characterized by comprising a first shell (3) and a second shell (5), wherein the inner end of the first shell (3) is connected with the inner end of the second shell (5);

the transmission shaft (2) is arranged in the first shell (3) through a transmission shaft sliding bearing (17), and the head of the transmission shaft (2) passes through the outer end of the first shell (3) and is connected with the disc stacking cutter (1); a roller shaft (8) of the roller (4) is movably arranged in the first shell (3) through a roller shaft bearing (18), a shell of the roller shaft bearing (18) is fixed on the tail end of the transmission shaft (2), and a return spring (10) is arranged between the shell of the roller shaft bearing (18) and the inner side of the outer end of the first shell (3);

an excitation wheel shaft (9) of the excitation wheel (6) is arranged in the second shell (5) through an excitation wheel shaft bearing (13) and an excitation wheel shaft end bearing (23); the excitation wheel shaft (9) is vertical to the transmission shaft (2); the vibration exciting wheel (6) is connected with the hydraulic motor (7), and the vibration exciting wheel (6) is meshed with the roller (4).

2. The multi-amplitude axial excitation coal rock crushing mechanism as claimed in claim 1, wherein the connecting lug at the outer end of the second shell (5) is of a hole-shaped structure, the outer hole of the connecting shaft sleeve (27) is arranged in the hole-shaped structure, the inner hole is arranged on the cylindrical surface at two sides of the connecting shaft (29), and the connecting shaft positioning sleeve (30) and the shaft end retainer ring (28) are arranged on the connecting shaft (29) to realize the positioning and fastening of the connecting shaft (29).

3. The multi-amplitude axial excitation coal rock breaking mechanism as claimed in claim 1, wherein the sealing member (16) seals the transmission shaft sliding bearing (17) on the transmission shaft (2).

4. The multi-amplitude axial excitation coal rock crushing mechanism as claimed in claim 1, wherein the first shell (3) and the second shell (5) are connected through a positioning pin (19), a bolt (24), a nut (25) and a locking pad (26).

5. The multi-amplitude axial excitation coal rock crushing mechanism as claimed in claim 1, wherein the roller shaft (8) is mounted on a roller shaft bearing (18) through an elastic snap ring I (11) and an elastic snap ring II (12), and a positioning sleeve III (20) is further arranged on the roller shaft (8).

6. The multi-amplitude axial excitation coal rock crushing mechanism is characterized in that an excitation wheel shaft (9) is mounted on a bearing (23) at the tail end of the excitation wheel shaft through an elastic clamp spring III (21), and a positioning sleeve I (14), a positioning sleeve II (15) and a positioning sleeve IV (22) are further arranged on the excitation wheel shaft (9).