CN204900782U - Lubrication and seal structure of speed reducer input shaft - Google Patents

Abstract

The utility model discloses a lubrication and seal structure of speed reducer input shaft, pass through lid, bearing housing, box, plug screw, first glib talker, oil blanket cover, first oil blanket, second oil blanket, bearing, third oil blanket, screw including input shaft, maze rotating ring, maze, the input shaft is located box inside and installs at the bearing, the bearing overcoat is equipped with the bearing housing, the input shaft is equipped with the oil blanket cover, has such characteristic, first oil blanket and second oil blanket install in the bearing housing, right lateral cavity room that first oil blanket is kept apart communicates with each other with whole speed reducer inner chamber. The utility model provides a technological problem of speed reducer input shaft bearing lubrication difficulty, satisfied the structure demand that the speed reducer multi -angle was installed scraper conveyor for. It has solved the sealed difficult problem under the abominable operational environment such as the many dust in colliery, coal dust to add the combination formula seal structure that the oil blanket is sealed through labyrinth seals in addition.

Description

A lubricating and sealing structure for the input shaft of a reducer

technical field

The utility model relates to a lubricating and sealing structure for an input shaft of a speed reducer, in particular to a lubricating and sealing structure for an input shaft in a speed reducer for scraper conveying.

Background technique

The scraper conveyor is a very critical equipment in coal mine production, and the reducer driven by the scraper conveyor is the most important thing. Whether its operation is normal or not is directly related to the coal output of the entire coal mine.

The operating conditions of the reducer in the mine are extremely harsh, and installation and maintenance are also very difficult. It often encounters high dust, overload, frequent start-up, long operating time, and large operating inclination. The bearing lubrication and sealing performance of the reducer directly determine the safety and reliability of the reducer for scraper conveyor.

At present, most of the reducers for scraper conveying below 400KW adopt the transmission structure type of one-stage bevel gear and two-stage helical gear, and adopt the lubrication and sealing structure of oil pool lubrication and single oil seal or double oil seal seal. This lubricating and sealing structure has the following disadvantages: 1. The lubricating effect is not good. When the inclination angle of the scraper conveyor is large, the inclination angle between the input shaft of the reducer and the horizontal plane is also large. Lubricating oil must be added enough to lubricate the input shaft bearings. Since the lubricating oil volatilizes during the working process of the reducer, if you do not pay attention, the input shaft bearings of the reducer will burn out due to poor lubrication. Major accidents; in addition, due to the large amount of lubricating oil in the oil pool, it is easy to cause the temperature of the reducer to rise and reduce the operational reliability of the reducer. 2. Poor sealing. With the ordinary sealing structure, external pollutants such as coal dust can directly contact the lip of the oil seal. Under high-speed rotation, the wear of the lip of the oil seal will be accelerated, causing the oil seal to fail early, causing leakage and pollution of lubricating oil, and at the same time causing Insufficient lubricating oil causes damage to bearings and other parts.

Utility model content

The purpose of this utility model is to provide a lubricating and sealing structure of the input shaft bearing of the reducer with reliable lubrication, good sealing and strong maintainability in view of the above-mentioned existing technical deficiencies.

The technical problem of the utility model is realized through the following technical solutions:

A lubricating and sealing structure for an input shaft of a reducer, including an input shaft, a labyrinth moving ring, a labyrinth transparent cover, a bearing sleeve, a box body, a screw plug, a first oil nozzle, an oil seal sleeve, a first oil seal, a second oil seal, a bearing, The third oil seal and screw, the input shaft is located inside the box and installed on the bearing, the outer bearing is provided with a bearing sleeve, and the input shaft is provided with an oil seal sleeve, which has such a feature that the first oil seal and The second oil seal is installed in the bearing sleeve, and the right chamber isolated by the first oil seal communicates with the inner cavity of the entire reducer; the bearing is installed in the sealed cavity composed of the second oil seal and the third oil seal; the box The body is provided with a grease injection groove and equipped with a first grease nozzle and a screw plug. The bearing sleeve is equipped with an annular groove and an oil hole. When replacing the grease in the bearing sealing cavity, the grease is released from the first grease nozzle It is injected at the first channel composed of the box body and the bearing sleeve into the cavity where the bearing is located, and at the same time the waste grease is discharged from the cavity through the second channel composed of the sealed transparent cover and the box body.

Further, in the lubricating and sealing structure of the input shaft of the reducer provided by the utility model, it can also have such features: it also includes a labyrinth moving ring and a labyrinth cover; the labyrinth cover is fixed on the box by bolts, The labyrinth moving ring cooperates with the labyrinth transparent cover to form a labyrinth cavity with a gap, and the inner side of the labyrinth transparent cover is equipped with a third oil seal for separating the grease on the left and right sides, and the labyrinth moving ring and the labyrinth transparent cover form a non-contact radial labyrinth cavity.

Furthermore, in the lubricating and sealing structure of the input shaft of the reducer provided by the utility model, it may also have such a feature: the labyrinth moving ring is fixed on the input shaft by a set screw.

Further, in the lubricating and sealing structure of the input shaft of the reducer provided by the utility model, it can also have such a feature: the labyrinth moving ring is provided with an annular labyrinth groove, and the outer side of the labyrinth transparent cover is provided with the labyrinth. Labyrinth grooves match labyrinth ridges.

Further, in the lubricating and sealing structure of the input shaft of the reducer provided by the utility model, it may also have such a feature: it also includes a second oil nipple, and the second oil nipple is connected to the labyrinth transparent cover through a pipe fitting to form a grease injection the third channel.

Furthermore, in the lubricating and sealing structure of the input shaft of the reducer provided by the present invention, it may also have such a feature: the labyrinth transparent cover is provided with a grease return groove.

Compared with the prior art, the utility model mainly seals the bearing at the end of the input shaft of the reducer into an independent chamber through the oil seals on the left and right sides, and lubricates the bearing at this place through the lubricating grease filled in advance. The technical problem of difficulty in lubricating the input shaft bearing of the reducer is solved, and the structural requirements for multi-angle installation of the reducer for the scraper conveyor are met. In addition, the combined sealing structure of the labyrinth seal and the oil seal seal solves the sealing problem in harsh working environments such as coal mine dust and coal dust. The lubricating and sealing structure has the advantages of compact structure, good lubricating effect, high sealing performance, and convenient maintenance, which prolongs the service life of the bearing and oil seal, improves the stability and reliability of the reducer, and reduces the failure rate and maintenance. cost, with high performance advantages.

Description of drawings

Fig. 1 is a schematic diagram of the lubrication and sealing structure of the input shaft of the reducer of the present invention.

Figure 2 is a schematic diagram of the installation angle of the reducer in working condition.

Fig. 3 is a sectional view of the reducer.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the following embodiments will specifically illustrate the lubrication and sealing structure of the input shaft of the reducer provided by the utility model in conjunction with the accompanying drawings.

Marking description in Figure 1 to Figure 3: 1—input shaft, 2—labyrinth moving ring, 3—labyrinth cover, 4—bearing sleeve, 5—casing body, 6—second oil nozzle, 7—screw plug, 8th One oil nozzle, 9-outer bearing, 10-oil seal sleeve, 11-first oil seal, 12-second oil seal, 13-bearing, 14-third oil seal, 15-screw.

Figure 2 is a schematic diagram of the installation angle of the reducer in the working state. When the installation angle reaches 30°, if the transmission lubrication method is adopted, the lubricating oil needs to be filled to the second oil level line, so that the bearing 13 can be lubricated. In this state , The cavity of the reducer is almost completely filled with lubricating oil. During continuous operation, the whole machine is seriously heated, and the lubrication effect of the bearing 13 is not good.

The lubricating and sealing structure adopted by the utility model enables the lubricating oil in the reducer to be filled to the first oil level line to meet the lubrication requirements of the bearings of the complete machine, greatly improving the reliability of the complete machine. The specific implementation plan is as follows:

A lubricating and sealing structure for the input shaft of a reducer for scraper conveying, including an input shaft 1, a labyrinth moving ring 2, a labyrinth cover 3, a bearing sleeve 4, a box body 5, a second oil nozzle 6, a screw plug 7, a first Oil nipple 8, outer bearing 9, oil seal sleeve 10, first oil seal 11, second oil seal 12, bearing 13, third oil seal 14, screw 15.

Specifically, as shown in Fig. 1 and Fig. 3, the first oil seal 11 and the second oil seal 12 are installed in the bearing sleeve 4, the lip of the oil seal is in contact with the wear-resistant oil seal sleeve 10, and the orientation of the lip of the oil seal is shown in the enlarged view I in the figure As shown, the lubricating oil in the cavity on the right side of the reducer is prevented from entering the cavity formed by the second oil seal 12 and the third oil seal 14 through the first oil seal 11, so as to avoid the confusion of lubricating oil and grease and cause poor lubricating effect; As shown in the enlarged view III in the figure, the bearing 13 is installed in a sealed cavity composed of the second oil seal 12 and the third oil seal 14, and the bearing 13 is lubricated by the lubricating grease previously filled in the cavity. The box body 5 is provided with a grease injection tank and is equipped with a first grease nipple 8 and a screw plug 7. The bearing sleeve 4 is provided with an annular groove and an oil hole, and the labyrinth cover 3 is provided with a grease return groove. When the lubricating grease is used, the lubricating grease is injected from the first nozzle 8, and injected into the cavity where the bearing 13 is located through the first channel composed of the box body 5 and the bearing sleeve 4, and the waste lubricating grease is passed through the sealed transparent cover from the cavity 3. Discharge from the second channel formed by the box body 5, thereby completing the replacement of the grease (when replacing the grease, the screw plug 7 is unscrewed, and the screw plug 7 is screwed on after the replacement is completed).

As shown in the enlarged view III in the figure, the labyrinth moving ring 2 is provided with an annular labyrinth groove, and the outer side of the labyrinth transparent cover 3 is provided with a labyrinth protrusion matching the labyrinth groove, and the labyrinth transparent cover 3 is fixed on the On the box body 5, the labyrinth moving ring 2 cooperates with the labyrinth transparent cover 3 to form a labyrinth cavity with a gap, and the labyrinth moving ring 2 is fixed on the input shaft 1 by a set screw 15, so that it rotates together with the input shaft during work, and the labyrinth A third oil seal 14 is installed inside the transparent cover 3 to separate the grease on the left and right sides; the second grease nipple 6 is connected with the labyrinth transparent cover 3 through a pipe fitting to form a third channel for grease injection. The labyrinth moving ring 2 and the labyrinth cover 3 form a non-contact radial labyrinth cavity, which is filled with grease, which not only ensures that the grease in the cavity will not be lost due to the centrifugal force generated by the high-speed rotation of the input shaft, It also makes good use of the characteristics of grease to absorb coal dust and impurities, ensuring that external pollutants cannot contact the oil seal lip, reducing premature wear of the oil seal lip, and improving the service life of the oil seal. The filling of lubricating grease here can be filled into the labyrinth cavity through the third channel through the second grease nipple 6, and waste lubricating grease is discharged through the gap between the labyrinth moving ring 2 and the labyrinth transparent cover 3 at the same time.

This lubricating and sealing structure not only solves the technical problem of difficulty in lubricating the input shaft bearing of the reducer, meets the structural requirements for the multi-angle installation of the reducer for scraper conveyors, but also solves the problem of severe dust and coal dust in coal mines. sealing problem. It has good performance advantages and broad prospects.

Of course, the lubricating and sealing structure of the input shaft of the reducer involved in the present invention is not limited to the structure in this embodiment, and any equivalent modification and replacement of the present invention are also within the scope of the present invention.

Claims (6)

1. the lubrication of a speed reducer input shaft and sealing configuration, comprise input shaft (1), labyrinth rotating ring (2), labyrinth transparent cover (3), bearing housing (4), casing (5), plug screw (7), first oil nozzle (8), oil-sealing sleeve (10), first oil sealing (11), second oil sealing (12), bearing (13), 3rd oil sealing (14), screw (15), described input shaft (1) is positioned at casing (5) inside and is arranged on bearing (13), bearing housing (4) is arranged with outside described bearing (13), described input shaft (1) is provided with oil-sealing sleeve (10), it is characterized in that:

Described the first oil sealing (11) and the second oil sealing (12) are arranged in bearing housing (4), and the right chamber that the first oil sealing (11) is isolated communicates with whole speed reducer inner chamber;

Described bearing (13) is arranged in the seal chamber be made up of the second oil sealing (12) and the 3rd oil sealing (14);

Be provided with greasing oil groove in described casing (5) and coordinate and the first oil nozzle (8) and plug screw (7) are housed, the upper cooperation of described bearing housing (4) is provided with circular groove and oilhole, when changing the lubricating grease in bearing (13) Seal cage, lubricating grease is injected by the first oil nozzle (8), in first passage injection bearing (13) the place cavity formed via casing (5), bearing housing (4), simultaneously waste and old lubricating grease is discharged by the second channel consisted of sealing transparent cover (3), casing (5) in cavity.

2. the lubrication of a kind of speed reducer input shaft according to claim 1 and sealing configuration, is characterized in that, also comprise labyrinth rotating ring (2), labyrinth transparent cover (3);

Described labyrinth transparent cover (3) is bolted on casing (5), described labyrinth rotating ring (2) coordinates with labyrinth transparent cover (3) chamber, labyrinth being formed and have gap, the 3rd oil sealing (14) of the lubricating grease separating the left and right sides is equipped with in labyrinth transparent cover (3) inner side, and labyrinth rotating ring (2) and labyrinth transparent cover (3) define a kind of non-contacting radial labyrinth cavity.

3. the lubrication of a kind of speed reducer input shaft according to claim 2 and sealing configuration, it is characterized in that, described labyrinth rotating ring (2) is fixed on input shaft (1) by Cock screw (15).

4. the lubrication of a kind of speed reducer input shaft according to claim 2 and sealing configuration, it is characterized in that, described labyrinth rotating ring (2) is provided with annular labyrinth groove, and labyrinth transparent cover (3) outside is provided with the labyrinth raised line suitable with described labyrinth groove.

5. the lubrication of a kind of speed reducer input shaft according to claim 2 and sealing configuration, it is characterized in that, also comprise the second oil nozzle (6), described the second oil nozzle (6) is connected to form the third channel in order to greasing by pipe fitting and labyrinth transparent cover (3).

6. the lubrication of a kind of speed reducer input shaft according to claim 2 and sealing configuration, it is characterized in that, described labyrinth transparent cover (3) is provided with back fat groove.