CN-115962273-B - Abrasive grain early warning device and mounting structure thereof

CN115962273BCN 115962273 BCN115962273 BCN 115962273BCN-115962273-B

Abstract

The invention relates to an abrasive grain early warning device and an installation structure thereof, wherein the abrasive grain early warning device comprises an outer shell, an inner shell and a base which are coaxially arranged, a connecting end of an abrasive grain early warning sensor is arranged at a core part of the base, a main body of the abrasive grain early warning sensor is suspended and extended in the rear part of the base and an inner hole of the inner shell, an outer shell oil groove and an inner shell oil groove which are internally and externally communicated are respectively arranged on the outer shell and the inner shell, the rotating base drives the inner shell to rotate so that the abrasive grain early warning device is switched between a working state and a maintenance state, the outer shell oil groove is communicated with the inner shell oil groove in the working state, the outer shell oil groove is not communicated with the inner shell oil groove in the maintenance state, the abrasive grain early warning device installation structure comprises a bearing seat and an abrasive grain early warning device, a plurality of cavities are arranged in the bearing seat, and the abrasive grain early warning device is mainly suspended and extended in the corresponding cavities. The invention can adsorb and remove abrasive particles in the oil pool of the planetary mechanism and output early warning information, can improve the cleaning degree of the oil pool and the quality of oil, and ensures the normal operation of an oil film.

Inventors

ZHANG LIQIANG
LIU ZHEN
GAO ZHENBANG
Quan Baochao
He xinxing
ZHOU CHANGFEI
HU TAO
WANG ZHENQIAN
HU JING
DONG CHAO
GU ENYANG
YANG GUICHENG
GUO DAI

Assignees

天地上海采掘装备科技有限公司
中煤科工集团上海有限公司

Dates

Publication Date: 20260512
Application Date: 20230214

Claims (10)

1. The abrasive grain early warning device is characterized by comprising an outer shell, an inner shell and a base, wherein the outer shell, the inner shell and the base are coaxially arranged, the outer shell is of a barrel-shaped structure with an open front end and a closed rear end, meanwhile, the front end of the outer shell is of a flange structure, the base is of a hollow stepped shaft structure with a thick front end and a thin rear end, a step surface is formed between thick and thin shaft sections, the front part of the base is inlaid in an inner hole at the front part of the outer shell, a seal is arranged between cylindrical surfaces of the outer shell and the base, the inner shell is of a barrel-shaped structure, the inner shell and the outer shell form shaft hole matching, the upper limit of the inner shell in the axial direction is positioned between the rear end of the outer shell and the step surface of the base, the connecting end of an abrasive grain early warning sensor is arranged at the core part of the base, and the sensing part of the abrasive grain early warning sensor is overhanging behind the base and in the inner hole of the inner shell; the abrasive grain early warning device comprises an outer shell, an inner shell, an outer shell oil groove, an inner shell oil groove, a circumferential limiting structure, a positioning screw, an arc-shaped groove, a positioning screw and a positioning screw, wherein the outer shell oil groove and the inner shell oil groove are respectively communicated with each other, the outer shell oil groove and the inner shell oil groove are respectively arranged on the outer shell and the inner shell, the circumferential limiting structure is arranged between the inner shell and the base, the inner shell can be driven to rotate relative to the outer shell through rotating the base, so that the abrasive grain early warning device is switched between a working state and a maintenance state, the outer shell oil groove is communicated with the inner shell oil groove in the working state, the outer shell oil groove is not communicated with the inner shell oil groove in the maintenance state, the arc-shaped groove is circumferentially extended, the notch is outwards, the outer shell is provided with a threaded hole which is radially communicated, the position of the threaded hole is aligned with the arc-shaped groove in the axial direction, the positioning screw is arranged in the threaded hole, the inner end of the positioning screw is inserted into the arc-shaped groove, and the inner end of the positioning screw is respectively leaned against two ends of the arc-shaped groove in the working state and in the maintenance state.
2. The abrasive grain early warning device according to claim 1, wherein the front end of the inner shell is provided with a boss protruding forwards in the axial direction, the front shaft section of the base is provided with a clamping groove extending in the radial direction and having a notch facing backwards, and the boss is embedded into the clamping groove to form the circumferential limiting structure.
3. The abrasive grain warning device according to claim 1, wherein the outer casing oil groove and the inner casing oil groove are a plurality of axially extending elongated holes arranged at intervals in the circumferential direction, and the outer casing oil groove and the inner casing oil groove correspond to each other one by one in the operating state, and are staggered with each other in the maintenance state.
4. The abrasive grain early warning device of claim 1, wherein the front end surfaces of the base and the shell are respectively provided with a base wire passing groove and a shell wire passing groove, and wiring of the abrasive grain early warning sensor sequentially passes through the base wire passing groove and the shell wire passing groove after passing out from the core part of the base.
5. The abrasive grain warning device of claim 1,2, 3 or 4, wherein the front section of the core bore of the base is a polygonal bore, and adjacent to the polygonal bore is a front threaded bore.
6. The abrasive grain early warning device according to claim 5, further comprising a locking mechanism, wherein the locking mechanism comprises a radially extending lock hole arranged in the base and a locking end hole arranged on the wall of the front portion of the shell, the inner end of the lock hole is communicated with the polygonal inner hole, the lock hole is sequentially provided with a threaded hole section, a spring mounting hole section and a ball socket section from inside to outside, in the mounting state, the lock hole is sequentially provided with a plug, a spring and a steel ball from inside to outside, in the working state, the lock hole is opposite to the locking end hole, and the steel ball abuts against the inner surface of the locking end hole.
7. The utility model provides an abrasive grain early warning device mounting structure, its characterized in that includes coal-winning machine rocking arm planetary mechanism bearing frame and claim 1,2, 3, 4, 5 or 6 the abrasive grain early warning device, coal-winning machine rocking arm planetary mechanism bearing frame belongs to dish type part, including the bearing frame body, be equipped with the bearing hole on the bearing frame body, the axis of bearing hole is horizontal extension from front to back, the rear end of bearing hole is equipped with the flange, the rear end middle part of bearing frame body is equipped with circular recess, be equipped with a plurality of circumferencial direction interval distribution's cavity in the bearing frame body, the cavity opening is on the tank bottom of recess and the cell wall that is close to the tank bottom, the rear end face of flange is located the tank bottom, be equipped with preceding external spigot and back external spigot respectively on the front and back both ends of bearing frame body, the abrasive grain early warning device mounting hole is seted up on the joint terminal surface of preceding external spigot with one the cavity communicates with each other, abrasive grain device passes through flange structure is fixed on the bearing frame body, the majority of abrasive grain early warning device stretches into corresponding cavity.
8. The abrasive grain early warning device mounting structure according to claim 7, wherein a plurality of inclined holes and a plurality of radial through holes are radially distributed in the bearing seat body in a center, one end of each inclined hole is formed in the front end face of the bearing seat body and is close to the inner side edge of the front end face, the other end of each inclined hole is communicated with one cavity, and each radial through hole radially extends and penetrates through one cavity.
9. The abrasive grain early warning device mounting structure of claim 8, wherein a radially-through oil drain hole is further formed in the outer side wall of one of the cavities of the bearing seat body, the abrasive grain early warning device mounting hole and the oil drain hole are communicated with the same cavity, and the cavity is located at the lowest position in the circumferential direction relative to other cavities.
10. The abrasive grain early warning device mounting structure of claim 9, wherein the front outer spigot is further provided with a housing groove and a housing hole on the joint end face, and wiring of the abrasive grain early warning sensor is led out from the housing wire passing groove and then routed from the housing groove and the housing hole.

Description

Abrasive grain early warning device and mounting structure thereof Technical Field The invention relates to an abrasive grain early warning device and an installation structure thereof, which are mainly used for a final planetary mechanism of a rocker arm of a coal mining machine and belong to the technical field of coal mining machines. Background The final planetary mechanism of the rocker arm of the coal mining machine is used as a direct driving device of the roller executing mechanism and is positioned at a transmission position with the largest stress and the worst working condition, wherein the transmission position is subjected to load impact firstly. Along with the continuous increase of the power density of the planetary mechanism, in order to improve the bearing capacity, the strength of the transmission parts is designed to be higher, so that the cavity volume of the planetary mechanism is smaller and smaller, the heat storage capacity of an oil pool of the planetary mechanism is weaker, and the secondary problem caused by the heating problem is gradually increased. The final planetary mechanism of the rocker arm of the coal mining machine is used as an independent cavity, the self-installation to the overhaul inspection is kept in a sealed state generally, abrasive particles gradually increased in the self-installation to the overhaul inspection cannot be discharged out of the cavity, and meanwhile, the condition that dust particles enter the cavity to pollute oil liquid due to the fact that the abrasion ratio of a sealing surface of a floating seal is reduced under the condition of impact vibration possibly occurs, and the contact surface of a transmission system is influenced after long-time use. Meanwhile, a large number of planetary mechanisms of the existing structure have the problem that oil cannot be thoroughly discharged due to the fact that no discharge channel is arranged, and even if oil is changed and maintained, residues such as bottom abrasive particles still cannot be discharged and removed. Aiming at the problems of force, heat, oil quantity, abrasive particles, impurities and the like, as well as the problems of compact structure, difficult maintenance and the like, the problems of oil change, improvement of the bearing quality of a floating seal and carburizing and quenching process and the like are generally adopted in the industry, so that the influence of the factors on a transmission system is reduced. The transmission system, especially the final planetary mechanism, becomes delicate in practical use, requires considerable maintenance force to prolong the service life, is easy to cause problems once the maintenance is not in place, causes great loss and production halt to affect exploitation, and meanwhile, oil liquid is replaced relatively frequently, so that the maintenance time and cost are increased. Disclosure of Invention The invention aims to provide an abrasive particle early warning device and an installation structure thereof, which can adsorb and remove abrasive particles in an oil pool of a planetary mechanism, improve the cleaning degree of the oil pool of the planetary mechanism and the quality of oil, and ensure the normal operation of an oil film. The main technical scheme of the invention is as follows: The abrasive grain early warning device comprises an outer shell, an inner shell and a base, wherein the outer shell, the inner shell and the base are coaxially arranged, the outer shell is of a barrel-shaped structure with an open front end and a closed rear end, meanwhile, the front end of the outer shell is of a flange structure, the base is of a hollow stepped shaft structure with a thick front end and a thin rear end, a step surface is formed between thick and thin shaft sections, the front part of the base is inlaid in an inner hole at the front part of the outer shell, sealing is arranged between cylindrical surfaces of the outer shell and the base, the inner shell is of a barrel-shaped structure, the inner shell is matched with the outer shell to form a shaft hole, the upper limit of the inner shell in the axial direction is positioned between the rear end of the outer shell and the step surface of the base, the connecting end of an abrasive grain early warning sensor is arranged at the core of the base, the sensing part of the abrasive grain early warning sensor is overhanging in the rear end of the inner shell and the inner hole of the inner shell, an outer shell oil groove and an inner shell groove which runs through inwards are respectively arranged on the outer shell and the inner shell, a circumferential limit structure is arranged between the inner shell and the base, the outer shell can drive the inner shell to rotate through rotating the base, so that the abrasive grain device can be switched between a working state and a maintenance state, the outer shell groove is communicated with the outer shell groove, in the maintenance state, the o