CN207661111U - Shaft end sealing structure of speed reducer - Google Patents

Abstract

The utility model relates to a shaft end sealing structure of a reducer, which comprises a transparent cover and a sealing member arranged between the reducer casing and the extending end of the reducer shaft, and the transparent cover and the reducer casing are fixedly connected by bolts; the utility model also includes Gland; the seal includes an oil seal and a sealing packing, the inner side of the transparent cover is provided with a sealing member positioning surface, the oil seal is arranged close to the sealing member positioning surface, the sealing packing is arranged on the outer side of the oil seal, and the axial direction is realized through the outer transparent cover. fixed; the transparent cover, the gland, the oil seal and the sealing packing are all axisymmetric split structures, and the split surfaces of the oil seal and the sealing packing are arranged alternately. In the utility model, sealing packing is arranged on the outside of the oil seal, and the compression amount of the sealing packing is slightly adjusted through the gland to make up for the shaft end leakage caused by the wear of the oil seal; each part of the sealing structure adopts a split structure, which is convenient for online maintenance and replacement.

Description

A shaft end seal structure of a reducer

technical field

The utility model relates to the technical field of mechanical equipment sealing, in particular to a shaft end sealing structure of a reducer.

Background technique

The converter tilting reducer plays a dominant role in the converter mechanical system. The good lubrication of the transmission parts such as the internal gear and bearing of the reducer plays a decisive role in the service life of the reducer. However, in the actual production process, oil leakage and oil leakage often occur at the shaft extension end of the high-speed shaft of the converter tilting speed machine. The leaked gear oil will not only pollute the environment, but also make the reducer lack of lubricating oil, which will increase the wear of the gears and bearings, resulting in a greatly reduced service life of the reducer. At the same time, the long-term leakage of lubricating oil greatly increases the maintenance cost of the equipment.

Contents of the invention

The utility model provides a shaft end sealing structure of a reducer. A sealing packing is arranged outside the oil seal, and the compression amount of the sealing packing is slightly adjusted through a gland to make up for the shaft end leakage caused by the wear of the oil seal; each part of the sealing structure adopts The split structure is convenient for online maintenance and replacement.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A shaft end sealing structure of a reducer, including a transparent cover and a seal arranged between the reducer casing and the extension end of the reducer shaft, the transparent cover and the reducer casing are fixedly connected by bolts; a gland is also included; The sealing member includes an oil seal and a sealing packing, the inside of the transparent cover is provided with a sealing member positioning surface, the oil seal is arranged close to the sealing member positioning surface, the sealing packing is arranged on the outer side of the oil seal, and is axially fixed through the outer transparent cover; The through cover, gland, oil seal and sealing packing are all axisymmetric split structures, and the split surfaces of the oil seal and the sealing packing are arranged alternately.

The split structures of the gland are fixedly connected by connecting bolts.

The transparent cover is provided with a plurality of adjusting screw holes along the circumferential direction, and the gland is provided with an open slot along the circumferential direction, and the adjusting screw passes through an open slot on the gland and is fixed in the adjusting screw hole on the transparent cover to realize the axis of the gland. Orientation and adjustment of the axial clearance of the seal.

Compared with the prior art, the beneficial effects of the utility model are:

1) A sealing packing is provided on the outside of the oil seal, and the compression amount of the sealing packing is slightly adjusted through the gland to make up for the leakage of the shaft end caused by the wear of the oil seal, effectively reducing the oil leakage at the shaft extension of the reducer; ensuring the internal transmission parts of the reducer Good lubrication, prolong the service life of the reducer;

2) Each part of the sealing structure adopts a split structure, which is convenient for online maintenance and replacement.

Description of drawings

Fig. 1 is a schematic diagram of a shaft end seal structure of a conventional reducer.

Fig. 2 is a schematic diagram of a shaft end sealing structure of a reducer according to the present invention.

Fig. 3a is a front view of the transparent cover of the present invention.

Figure 3b is a side cross-sectional view of Figure 3a.

Fig. 4a is a front view of the gland of the present invention.

Figure 4b is a side cross-sectional view of Figure 3a.

In the figure: 1. Reducer box 2. Reducer shaft 3. Through cover 4. Gland 5. Oil seal 6. Seal packing 7. Adjusting bolt hole 8. Open slot 9. Fixing bolt hole

Detailed ways

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

As shown in Figure 2, the shaft end sealing structure of the reducer described in the utility model includes a transparent cover 3 and a seal arranged between the reducer casing 1 and the extended end of the reducer shaft 2, the transparent cover 3 and the reducer The chassis body 1 is fixedly connected by bolts (see the position of the fixing bolt holes in Figure 3a); it also includes a gland 4; the seal includes an oil seal 5 and a sealing packing 6, and the inner side of the transparent cover 3 is provided with a seal for positioning surface, the oil seal 5 is set close to the positioning surface of the seal, and the sealing packing 6 is arranged on the outer side of the oil seal 5, and is axially fixed through the outer transparent cover 3; the transparent cover 3, the gland 4, the oil seal 5 and the sealing packing 6 are all It is an axisymmetric split structure, and the split surfaces of the oil seal 5 and the sealing packing 6 are arranged alternately.

The split structures of the gland 4 are fixedly connected by connecting bolts.

As shown in Figure 3a, the transparent cover 3 is provided with a plurality of adjusting screw holes 7 along the circumference, as shown in Figure 4a, the gland 4 is provided with an opening groove 8 along the circumference, after the adjustment screw passes through the opening groove on the gland 4 It is fixed in the adjusting screw hole 7 on the transparent cover 3 to realize the axial positioning of the gland 4 and the adjustment of the axial clearance of the seal.

The following examples are carried out on the premise of the technical solution of the utility model, and detailed implementation and specific operation process are provided, but the protection scope of the utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

【Example】

The shaft end seal structure of the conventional reducer is shown in Figure 1; in this embodiment, according to the actual situation on site, combined with the original design drawings, based on the principle of reliable sealing and easy maintenance, the shaft end seal structure of the reducer is improved as follows:

1) Modification of the transparent cover (as shown in Figure 3a and 3b); the cavity of the transparent cover 3 is lengthened and extended to the reducer box 1, and the installation size of the transparent cover 3 and the reducer box 1 remains unchanged; the seal adopts Press and fix the form by the gland 4 from the outside.

2) The crude oil seal is a 5505-type split oil seal. Because the cross-sectional connection of the 5505H-type split oil seal is in the form of plugging, there is a possibility of oil leakage, so the (5505H) oil seal 5+RAG220 sealing packing of Ф120×Ф150×12 is used 6 (16 × 16 packing) combination; the split surfaces of the two seals are arranged alternately to ensure reliable sealing and reduce the possibility of oil seepage and oil leakage.

3) A gland 4 is added on the outside of the transparent cover 3 and the seal (as shown in Figure 4a and Figure 4b), and the axial fixation and sealing of the seal are realized through the cooperation of the adjustment screw 7 and the corresponding opening groove 8 on the gland 4. On-line micro-adjustment of sealing packing 6; when the seal is worn out after running for a period of time, press the gland 4 axially toward the inner side of the reducer shaft 2 through the adjustment screw 7, and increase the compression amount of the sealing packing 6, which can effectively reduce micro-leakage Oil phenomenon, realize the online adjustment of the shaft end seal of the reducer.

4) Shaft end sealing structure including transparent cover 3, oil seal, sealing packing and gland 4 all adopt split structure, which is convenient for online maintenance, adjustment and replacement. The seal can be replaced without disassembling the reducer; thereby shortening the maintenance time and improving the maintenance efficiency.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and its concept should be covered within the protection scope of the present utility model.

Claims (3)

1. A shaft end sealing structure of a reducer, comprising a transparent cover and a seal arranged between the reducer casing and the extended end of the reducer shaft, the transparent cover and the reducer casing are fixedly connected by bolts; it is characterized in that, It also includes a gland; the seal includes an oil seal and a sealing packing, the inner side of the transparent cover is provided with a sealing member positioning surface, the oil seal is arranged close to the sealing member positioning surface, and the sealing packing is arranged on the outer side of the oil seal, and is realized through the outer transparent cover. Axially fixed; the transparent cover, gland, oil seal and sealing packing are all axisymmetric split structures, and the split surfaces of the oil seal and the sealing packing are arranged alternately. 2 . The shaft end sealing structure of a reducer according to claim 1 , wherein the split structures of the gland are fixedly connected by connecting bolts. 3 . 3. The shaft end sealing structure of a reducer according to claim 1, wherein the transparent cover is provided with a plurality of adjusting screw holes along the circumference, and the gland is provided with a plurality of opening slots along the circumference, through which the adjustment screws pass. The opening groove on the gland is fixed in the adjusting screw hole on the transparent cover to realize the axial positioning of the gland and the adjustment of the axial clearance of the seal.