CN204310388U - A kind of spiral reductor output seal device - Google Patents

Abstract

An output sealing device for a screw reducer, comprising a split-type output end cover arranged outside the output shaft of the reducer and connected to the reducer casing. The sealing seat is provided with a sealing cover through bolts at the outer end of the output sealing seat; a first sealing ring is provided between the inner end of the output sealing seat and the output shaft of the reducer, and a second sealing ring is provided between the sealing cover and the output shaft of the reducer. Two sealing rings, between the sealing cover and the inner end of the output sealing seat are provided with several felt rings and a retaining ring sleeved on the outside of the output shaft of the reducer. Its structural design is reasonable, and the split output end cover is used to effectively arrange the first sealing ring, felt ring, retaining ring and second sealing ring, so that it fits better with the output shaft of the reducer and minimizes the fixed clearance. , The seal is more stable and reliable, which effectively prevents dust from entering the inside of the end cover and greatly prolongs the service life of the reducer.

Description

A screw reducer output sealing device

Technical field:

The utility model relates to an output sealing device of a spiral speed reducer.

Background technique:

Screw conveyor is one of the most commonly used equipment for conveying materials for concrete mixing plants, chemicals, building materials, etc. As a key component of the screw conveyor, the life of the reducer is closely related to the interests of customers. The key technology to improve the service life is how to prevent or delay the time for powder to enter the reducer to ensure the normal use of the reducer.

At present, the output sealing structure of the screw conveyor of most manufacturers is shown in Figure 1, including the integrated output end cover 3 connected to the reducer casing 2, which is arranged on the outside of the output shaft 1 of the reducer, and the integrated output end cover 3 and Between the output shaft 1 of the reducer, there are circlips 4 for holes, oil seals 5, felt rings 6 and PTFE gaskets 7 in sequence from the inside to the outside. On the output shaft 1, there is a gap between the output shaft 1 of the reducer and the output seal. Since the output shaft 1 of the reducer is in operation, due to the influence of the static jump caused by the bending of the inner tube of the screw conveyor, the sloshing range is relatively large. As a result, there is a large gap between the output shaft 1 of the reducer and the output seal, and the powder can easily enter the inside of the end cover from the gap between the integrated output end cover 3 and the output shaft 1 of the reducer. The machine cannot operate normally, which greatly shortens the service life of the reducer.

Utility model content:

In order to make up for the deficiencies in the prior art, the utility model provides an output sealing device for a screw reducer, which has a reasonable structural design and adopts a split output end cover, which is convenient for effectively arranging the first sealing ring, the felt ring, the retaining ring and the second sealing ring. The sealing ring makes it fit better with the output shaft of the reducer, minimizes the fixed gap, makes the seal more stable and reliable, effectively prevents dust from entering the inside of the end cover, greatly prolongs the service life of the reducer, and solves the problem of existing problems in technology.

The technical scheme that the utility model adopts for solving the problems of the technologies described above is:

An output sealing device for a screw reducer, comprising a split-type output end cover connected to the reducer casing, which is arranged outside the output shaft of the reducer, and the split-type output end cover includes an output cover whose inner end is connected to the reducer casing through bolts. The sealing seat is provided with a sealing cover through bolts at the outer end of the output sealing seat; a first sealing ring is provided between the inner end of the output sealing seat and the output shaft of the reducer, and a second sealing ring is provided between the sealing cover and the output shaft of the reducer. Two sealing rings, between the sealing cover and the inner end of the output sealing seat are provided with several felt rings and a retaining ring sleeved on the outside of the output shaft of the reducer.

The utility model adopts the above-mentioned scheme, the structure design is reasonable, and the split output end cover is adopted, which is convenient for effectively arranging the first sealing ring, the felt ring, the retaining ring and the second sealing ring, so that it can fit better with the output shaft of the reducer, and the maximum The fixed-moving gap is minimized, the seal is more stable and reliable, effectively preventing dust from entering the inside of the end cover, and greatly extending the service life of the reducer.

Description of drawings:

Fig. 1 is a structural schematic diagram of an output sealing device of a traditional screw reducer.

Fig. 2 is a structural schematic diagram of the utility model.

In the figure, 1. Output shaft of reducer, 2. Shell of reducer, 3. Integrated output end cover, 4. Retaining ring for hole, 5. Oil seal, 6. Felt ring, 7. Tetrafluoro gasket, 8. Output Sealing seat, 9, sealing cover, 10, first sealing ring, 11, second sealing ring, 12, retaining ring.

Detailed ways:

In order to clearly illustrate the technical features of this solution, the utility model will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

As shown in Figure 2, a screw reducer output sealing device includes a split-type output end cover that is connected to the reducer casing 2 and is arranged on the outside of the reducer output shaft 1. The split-type output end cover includes an inner end through The output seal seat 8 connected with the reducer housing 2 by the bolt is provided with a seal cover 9 through bolts at the outer end of the output seal seat 8; a first seal ring is provided between the inner end of the output seal seat 8 and the output shaft 1 of the reducer 10. A second sealing ring 11 is provided between the sealing cover 9 and the output shaft 1 of the reducer, and a number of felts sleeved on the outside of the output shaft 1 of the reducer are provided between the sealing cover 9 and the inner end of the output sealing seat 8 Circle 6 and a retaining circle 12.

When installing, first install the first sealing ring 10 on the inside of the inner end of the output sealing seat 8, and then fasten the output sealing seat 8 on the reducer casing 2 through bolts, and the first sealing ring 10 will be connected to the output shaft 1 of the reducer. Closely attached, then install several felt rings 6 and retaining rings 12 on the output shaft 1 of the reducer, and finally inlay the second sealing ring 11 on the sealing cover 9, then set it on the output shaft 1 of the reducer, and then pass the bolt It is effectively connected with the output sealing seat 8. Change the original working method of putting the integrated output end cover 3 on the reducer output shaft 1 after the overall assembly, so as to facilitate the effective arrangement of the first sealing ring 10, several felt rings 6, retaining ring 12 and second sealing ring 11, Make it fit better with the output shaft 1 of the reducer, minimize the fixed-motion gap, make the seal more stable and reliable, effectively prevent dust from entering the inside of the end cover, and greatly prolong the service life of the reducer.

The parts of the utility model that are not described in detail are the known techniques of those skilled in the art.

Claims (1)

1. An output sealing device for a screw reducer, characterized in that: it includes a split-type output end cover connected to the reducer casing that is arranged on the outside of the output shaft of the reducer, and the split-type output end cover includes an inner end through a bolt and The output sealing seat connected to the reducer shell is provided with a sealing cover through bolts at the outer end of the output sealing seat; a first sealing ring is provided between the inner end of the output sealing seat and the output shaft of the reducer, and the sealing cover is connected to the output shaft of the reducer. A second sealing ring is arranged between the shafts, and several felt rings and a back-up ring sleeved on the outside of the output shaft of the reducer are arranged between the sealing cover and the inner end of the output sealing seat.