CN212480087U - Integrated bearing cover non-contact sealing structure of mechanical transmission slewing device - Google Patents

Abstract

The utility model discloses an integrated bearing cap non-contact sealing structure of a mechanical transmission slewing gear, wherein a bearing cap shell body is arranged on a box body, a split bearing cap is arranged outside a bearing hole of the box body and positioned in the bearing cap shell body, and an oil thrower wheel is arranged on an installation shaft and positioned in the split bearing cap; the split bearing cover is radially provided with an annular groove, the oil thrower is axially provided with two rows of circular discs, an inner circular disc of the oil thrower is positioned in the annular groove of the split bearing cover, an outer circular disc of the oil thrower is positioned in the annular groove formed by the split bearing cover and the bearing cover shell, and the two annular grooves and the inner and outer circular discs of the oil thrower respectively form a sealing cavity; establish the oil gallery No. one on the bearing cap shell body, No. two oil galleries of intercommunication oil gallery No. one are established to the subdivision formula bearing cap, and No. one the oil gallery link up the oil return passageway of sealed chamber and box. The structure is non-contact, has no abrasion, is free from maintenance and has reliable sealing performance.

Description

Integrated bearing cover non-contact sealing structure of mechanical transmission slewing device

Technical Field

The utility model belongs to mechanical transmission's axle head sealing field, concretely relates to mechanical transmission slewer's integral type bearing cap non-contact seal structure.

Background

The mechanical transmission slewing gear is widely applied to the industries of cement, construction, metallurgy, mine, transportation machinery and the like. The lubrication of the relative moving parts in the box body of the mechanical transmission rotary device on the market at present is mainly oil bath splash lubrication or circulating oil forced lubrication. The sealing form of the input and output shaft parts of the mechanical transmission slewing gear mainly takes a sealing ring or the contact type sealing of the sealing ring and an oil thrower as well as the sealing effect mainly depends on the manufacturing and mounting precision of the shaft, the hole and the sealing ring. In the use process of the machine, the sealing ring needs to be replaced periodically due to the service life problem, so that waste to a certain degree and economic loss caused by production halt and maintenance are caused.

Mechanical non-contact seals are also commonly used in applications where long term reliability of seals is required, such as in cement and metallurgical rolling lines. The general machinery non-contact seals need to install rotatory disc excircle position in the annular seal groove of bearing cap shell body, the bore size of annular seal groove is less than the external diameter size of disc, because the needs of mounting process, need make into the bearing cap shell body into subdivision formula structure, two half bearing cap shell bodies need to be connected through connecting bolt and locating pin and make up together, still need leave connecting bolt's spanner space, make bearing cap shell body thickness size increase, and the subdivision face need finish machining in advance, the subdivision face still need scribble sealed glue and prevent the oil leakage during the equipment. Not only the manufacturing process cost is improved, but also the risk of oil leakage along the subdivision surface towards the outside of the machine is increased.

Disclosure of Invention

The utility model aims to provide a: the integrated bearing cover non-contact sealing structure of the mechanical transmission slewing device is designed, the sealing structure is arranged at the position of an outward extending shaft of the mechanical transmission slewing device to play a sealing role, and the structure is non-contact, free of abrasion and maintenance, reliable in sealing performance and ideal in sealing effect.

The technical solution of the utility model is that: mechanical transmission slewer's integral type bearing cap non-contact seal structure, mechanical transmission slewer include box and axle, and the axle passes through the bearing to be installed in the box, its characterized in that: a sealing structure is arranged on the shaft, and the sealing structure comprises a bearing cover outer shell, an oil thrower and a split bearing cover; the bearing cover outer shell is arranged on the box body, the split bearing cover is arranged outside a bearing hole of the box body and is positioned in the bearing cover outer shell, and the oil thrower is arranged on the shaft and is positioned in the split bearing cover; the split bearing cover is at least provided with one annular groove in the radial direction, the oil thrower is at least provided with two rows of discs along the axial direction, an inner disc of the oil thrower is positioned in the annular groove of the split bearing cover, and an outer disc of the oil thrower is positioned in the other annular groove formed by combining the split bearing cover and the bearing cover outer shell; the annular groove of the split bearing cover, the other annular groove formed by combining the split bearing cover and the bearing cover outer shell, and the inner disc and the outer disc of the oil thrower respectively form a sealing cavity; establish No. one the oil gallery on the bearing cap shell body, be equipped with No. two oil galleries at the subdivision formula bearing cap, No. two oil galleries intercommunication No. one the oil gallery, one side of No. one the oil gallery link up the sealed chamber, the opposite side of No. one the oil gallery link up the oil return passageway on the box.

Furthermore, the split bearing cover is provided with a plurality of radial annular grooves along the axial direction, and the oil throwing disc is provided with a plurality of discs along the axial direction, and the discs are respectively and correspondingly arranged along the axial direction.

When the centrifugal oil thrower works, the oil thrower disc arranged on the shaft rotates along with the shaft, when the oil thrower disc rotates along with the shaft, lubricating oil entering the sealed cavity is driven to rotate to generate centrifugal motion, and the lubricating oil flies away from the disc of the oil thrower disc, gathers along the sealed cavity and flows into the oil return channel and flows back to the box body along the oil return channel.

The utility model has the advantages of it is following:

1. the oil thrower is of an integral structure, the split bearing cover is of a split structure, the bearing cover outer shell is of an integral structure, and the split surface of the split bearing cover is positioned inside the bearing cover outer shell, so that the risk of oil leakage along the split surface to the outside is avoided when the machine is used, and the structure is relatively simple;

2. the lubricating oil entering the sealing cavity generates centrifugal motion by utilizing the rotation of the shaft, and the lubricating oil flows back to the box body along the sealing cavity to achieve the sealing effect;

3. the sealing structure is a non-contact type seal, has no abrasion, does not need to replace a wearing part regularly, and has low maintenance cost;

4. the sealing structure does not need to be accurately centered when being installed, so that the requirement of an installation process is reduced;

5. the split bearing cover is provided with a plurality of radial annular grooves along the axial direction, the oil throwing disc is provided with a plurality of discs along the axial direction, and the discs are respectively and correspondingly arranged along the axial direction, so that the sealing effect with higher requirements is realized.

Drawings

Fig. 1 is a schematic view of a non-contact sealing structure of the present invention;

fig. 2 is a schematic sectional view of fig. 1.

In the figure: 1. the bearing comprises a bearing cover outer shell, 2 parts of a split bearing cover, 3 parts of an oil thrower, 4 parts of a sealing cavity, 5 parts of a box body, 6 parts of a bearing, 7 parts of a shaft, 8 parts of an oil return channel, 9 parts of a first oil return hole and 10 parts of a second oil return hole.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, the integrated bearing cap non-contact sealing structure of the mechanical transmission slewing device comprises a box body 5 and a shaft 7, wherein the shaft 7 is installed in the box body 5 through a bearing 6, and the mechanical transmission slewing device is characterized in that: a sealing structure is arranged on the shaft 7, and the sealing structure comprises a bearing cover outer shell 1, an oil thrower 3 and a split bearing cover 2; the bearing cap outer shell 1 is arranged on the box body 5, the split bearing cap 2 is arranged outside a bearing hole of the box body 5 and is positioned in the bearing cap outer shell 1, and the oil thrower 3 is arranged on the shaft 7 and is positioned in the split bearing cap 2; the split bearing cover 2 is at least provided with one annular groove in the radial direction, the oil thrower 3 is at least provided with two rows of discs along the axial direction, an inner disc of the oil thrower 3 is positioned in the annular groove of the split bearing cover 2, and an outer disc of the oil thrower 3 is positioned in the other annular groove formed by combining the split bearing cover 2 and the bearing cover outer shell 1; the annular groove of the split bearing cover 2, the other annular groove formed by combining the split bearing cover 2 and the bearing cover outer shell 1 and the inner disc and the outer disc of the oil thrower 3 form a sealing cavity 4 respectively; establish oil gallery 9 No. one on bearing cap shell body 1, be equipped with No. two oil gallery 10 at subdivision formula bearing cap 2, No. two oil gallery 10 intercommunication oil gallery 9 No. one, one side of oil gallery 9 link up sealed chamber 4, the opposite side of oil gallery 9 link up the oil return passageway 8 on the box 5.

Further, the split bearing cap 2 is provided with a plurality of radial annular grooves in the axial direction, and the oil slinger 3 is provided with a plurality of disks in the axial direction, which are respectively arranged correspondingly in the axial direction.

During operation, axle 7 is rotary motion, and rotary motion is done along with axle 7 to the disc 3 on the axle 7, and lubricating oil in the box 5 gets into sealed chamber 4, and lubricating oil rotates along with disc 3, flies off disc 3 under the effect of centrifugal force, assembles in oil return passage 8 through an oil gallery 9, flows back to in the box 5 at last.

Claims (2)

1. Mechanical transmission slewer's integral type bearing cap non-contact seal structure, mechanical transmission slewer include box (5) and axle (7), and install in box (5) its characterized in that through bearing (6) axle (7): a sealing structure is arranged on the shaft (7), and the sealing structure comprises a bearing cover outer shell (1), an oil thrower (3) and a split bearing cover (2); the bearing cover outer shell (1) is arranged on the box body (5), the split bearing cover (2) is arranged on the outer side of a bearing hole of the box body (5) and is positioned in the bearing cover outer shell (1), and the oil thrower (3) is arranged on the shaft (7) and is positioned in the split bearing cover (2); the split bearing cover (2) is at least provided with one annular groove in the radial direction, the oil thrower (3) is at least provided with two rows of discs along the axial direction, an inner disc of the oil thrower (3) is positioned in the annular groove of the split bearing cover (2), and an outer disc of the oil thrower (3) is positioned in the other annular groove formed by combining the split bearing cover (2) and the bearing cover outer shell (1); the annular groove of the split bearing cover (2), the other annular groove formed by the split bearing cover (2) and the bearing cover outer shell (1) and the inner disc and the outer disc of the oil thrower (3) form a sealing cavity (4) respectively; establish oil gallery (9) No. one on bearing cap shell body (1), be equipped with No. two oil gallery (10) in subdivision formula bearing cap (2), No. two oil gallery (10) intercommunication oil gallery (9), one side of oil gallery (9) link up sealed chamber (4), the opposite side of oil gallery (9) link up oil return passageway (8) on box (5).

2. The mechanical drive rotation device integrated bearing cap non-contact seal structure of claim 1, characterized in that: the split bearing cover (2) is provided with a plurality of radial annular grooves along the axial direction, and the oil thrower disc (3) is provided with a plurality of discs along the axial direction, and the discs are respectively and correspondingly arranged along the axial direction.

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