CN212635437U

CN212635437U - Shot blasting machine bracket transmission and sealing structure

Info

Publication number: CN212635437U
Application number: CN202020795590.2U
Authority: CN
Inventors: 姚玉壮; 都书阁
Original assignee: BHN SPECIAL MATERIALS Ltd
Current assignee: BHN SPECIAL MATERIALS Ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-03-02
Anticipated expiration: 2030-05-14

Abstract

The utility model provides a shot blasting machine bracket transmission and sealing structure, which comprises a chain wheel, a self-aligning bearing, a chain wheel shaft, a thrust bearing, a rotating disc and a plane thrust ball bearing, wherein the top and the bottom of the chain wheel shaft are respectively and coaxially fixed with the rotating disc and the chain wheel; a labyrinth seal is arranged between the bearing positioning plate and the rotating disc; a groove matched with the outer contour of the self-aligning bearing is arranged at the joint of the self-aligning bearing and the self-aligning bearing supporting plate; and a groove matched with the outline of the bearing positioning plate is arranged at the joint of the conical thrust bearing supporting plate and the bearing positioning plate. The structure has good sealing effect, the self-aligning bearing and the supporting plate thereof are fixed in position, sliding is not easy to generate, and the running strength and stability of the rotating mechanism of the shot blasting machine are ensured.

Description

Shot blasting machine bracket transmission and sealing structure

Technical Field

The utility model relates to a shot-blasting machine transmission, sealing technique especially relate to a shot-blasting machine bracket transmission and seal structure.

Background

The shot blasting machine is processing equipment for throwing steel grit steel shots at high speed to impact the surfaces of material objects through a shot blasting machine, the transmission structure form of a rotating bracket of the shot blasting machine is shown in figure 1, and the shot blasting machine comprises a chain wheel 1, a self-aligning bearing 2, a self-aligning bearing supporting plate 3, a conical thrust bearing supporting plate 4, a load plate 5 of the rotating bracket, a chain wheel shaft 6, a thrust bearing 7 and a bearing gland 8. Felt seals are used between the conical thrust bearing support plate 4 and the load plate 5 of the rotating carriage. The structure can realize that the bracket drives the shot-blasting object to rotate, but because the gap between the conical thrust bearing support plate 4 and the load plate 5 of the rotating bracket can not enter the gap without shot blasting, and in addition, the felt pad can not be completely and nondestructively sealed under the long-term grinding of shot blasting, the bearing, the chain wheel and the chain are frequently damaged as a result. In addition, the self-aligning bearing 2 and the self-aligning bearing supporting plate 3 are tightly fastened by four bolts, the bolts are difficult to loosen, the self-aligning bearing and the supporting plate slide, so that the chain wheel shaft inclines, the gap between the shaft and the supporting plate is increased, and shot blasting drops into the lower bearing from the top through the upper bearing until reaching the chain wheel chain.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the transmission structure of present shot-blasting machine rotating bracket, easily lead to sealed inefficacy, the fragile problem of bearing, sprocket and chain provides a shot-blasting machine bracket transmission and seal structure, and this structure seals between the effect good, self-aligning bearing and its backup pad rigidity, and the difficult production is slided, has guaranteed the intensity and the stability of slewing mechanism operation.

In order to achieve the above object, the utility model adopts the following technical scheme: a shot blasting machine bracket transmission and sealing structure comprises a chain wheel, a self-aligning bearing supporting plate, a conical thrust bearing supporting plate, a bearing positioning plate, a chain wheel shaft, a thrust bearing, a rotating disc and a planar thrust ball bearing, wherein the top and the bottom of the chain wheel shaft are respectively and coaxially fixed with the rotating disc and the chain wheel; a labyrinth seal is arranged between the bearing positioning plate and the rotating disc;

a groove matched with the outer contour of the self-aligning bearing is arranged at the joint of the self-aligning bearing and the self-aligning bearing supporting plate;

and a groove matched with the outline of the bearing positioning plate is arranged at the joint of the conical thrust bearing supporting plate and the bearing positioning plate.

Further, the clearance of the labyrinth seal channel is 1.5-2 mm. Too large a channel clearance easily causes the invasion of materials, and too small a channel clearance easily causes the friction between a rotating part and a static part.

Further, the length of the labyrinth seal passage in each direction is 10-15 mm.

Further, the labyrinth seal direction is changed 6-8 times.

Further, the depth of the groove is 1-3mm, preferably 2 mm.

Further, the thrust bearing is a tapered roller thrust bearing.

The utility model discloses shot-blasting machine bracket transmission and seal structure's principle: the driving device drives the chain wheel 1 to rotate through a chain, so that the top rotating disk 9 is driven to rotate through the chain wheel shaft 6. Three bearings are adopted between the chain wheel shaft 6 and the support frame thereof, the lowest set of self-aligning bearing 2 can position the chain wheel shaft and absorb slight swing of one point of the chain wheel end, and the middle is provided with a tapered roller thrust bearing 7 which can bear certain radial load and also assist in bearing one point of axial load; the upper part adopts a plane thrust ball bearing 10 which is used for bearing axial load; the three sets of bearings completely transfer axial and radial loads on the shaft to the rotating part, and ensure the running strength and stability of the rotating mechanism. In order to solve the radial sealing problem between the rotating disc 9 and the bearing positioning plate 11, labyrinth sealing is adopted; in order to solve the problem of the series motion between the bearing positioning plate 11 and the conical thrust bearing support plate 4, a groove is milled in the conical thrust bearing support plate 4 to ensure the uniqueness of the position. Similarly, a groove is milled between the self-aligning bearing 2 and the self-aligning bearing supporting plate 3 to ensure the bearing positioning.

The utility model discloses shot-blasting machine bracket transmission and seal structure is to shot-blasting machine bracket drive mechanism and sealed improvement, is particularly useful for the occasion that the axial force is great, sealed is strict. Compared with the prior art, the utility model has the following advantage:

1) the utility model solves the problem that the sliding possibly occurs between the self-aligning bearing 2 and the self-aligning bearing support plate 3, and a groove is milled at the joint of the self-aligning bearing support plate 3 and the self-aligning bearing 2, thereby avoiding the sliding between the self-aligning bearing and the support plate thereof; similarly, in order to solve the problem of crosstalk between the bearing positioning plate 11 and the conical thrust bearing support plate 4, the conical thrust bearing support plate 4 is milled with a groove to ensure the uniqueness of the position.

2) The utility model provides an upper portion is sealed, designs annular labyrinth seal with upper portion now, and the labyrinth passageway is 2mm, considers that the axial of going up labyrinth seal spare rotary disk 9 bears the load about 1.5t and its rotatory stability problem, adds one set of plane thrust ball bearing between two upper and lower labyrinth seal spare, has reached sealed effect like this, has also guaranteed the stability of bracket drive mechanism operation. The production practice proves that the improvement fully achieves the expected effect.

3) Three bearings are adopted between the chain wheel shaft and the support frame, the lowest set of self-aligning bearing 2 can position the shaft and absorb slight swing of one point of chain wheel end, and the middle set of self-aligning bearing 7 adopts a tapered roller thrust bearing which can bear certain radial load and also assist in bearing one point of axial load; the upper part adopts a plane thrust ball bearing 10 which is used for bearing axial load; the three sets of bearings completely transfer axial and radial loads on the shaft to the rotating part, and ensure the running strength and stability of the rotating mechanism.

Drawings

FIG. 1 is a schematic view of a transmission structure of a transmission bracket of a conventional shot blasting machine;

fig. 2 is the schematic view of the transmission and sealing structure of the bracket of the shot blasting machine of the utility model.

Detailed Description

The invention is further illustrated below with reference to the following examples:

example 1

The embodiment discloses a shot blasting machine bracket transmission and sealing structure, the structure of which is shown in fig. 2, and the shot blasting machine bracket transmission and sealing structure comprises a chain wheel 1, a self-aligning bearing 2, a self-aligning bearing supporting plate 3, a conical thrust bearing supporting plate 4, a bearing positioning plate 11, a chain wheel shaft 6, a thrust bearing 7, a rotating disc 9 and a planar thrust ball bearing 10, wherein the top and the bottom of the chain wheel shaft 6 are coaxially fixed with a rotating disc 9 and the chain wheel 1 respectively, the chain wheel shaft 6 is sleeved with the planar thrust ball bearing 10, the thrust bearing 7 and the self-aligning bearing 2 from top to bottom, the planar thrust ball bearing 10 is supported by the bearing positioning plate 11, the thrust bearing 7 is supported by the conical thrust bearing supporting plate 4; the thrust bearing 7 is a tapered roller thrust bearing.

A labyrinth seal is arranged between the bearing positioning plate 11 and the rotating disc 9; the labyrinth seal channel clearance is 2 mm. Too large a channel clearance easily causes the invasion of materials, and too small a channel clearance easily causes the friction between a rotating part and a static part. The length of the labyrinth seal passage in each direction is 10 mm. The labyrinth seal direction was changed 8 times.

On the self-aligning bearing backup pad 3, be provided with the recess with the outer contour fit of self-aligning bearing 2 with self-aligning bearing 2 junction, the recess degree of depth is 2 mm.

And a groove matched with the outer contour of the bearing positioning plate 11 is arranged at the joint of the conical thrust bearing supporting plate 4 and the bearing positioning plate 11, and the depth of the groove is 2 mm.

The principle of the transmission and sealing structure of the bracket of the shot blasting machine in the embodiment is as follows: the driving device drives the chain wheel 1 to rotate through a chain, so that the top rotating disk 9 is driven to rotate through the chain wheel shaft 6. Three bearings are adopted between the chain wheel shaft 6 and the support frame thereof, the lowest set of self-aligning bearing 2 can position the chain wheel shaft and absorb slight swing of one point of the chain wheel end, and the middle is provided with a tapered roller thrust bearing 7 which can bear certain radial load and also assist in bearing one point of axial load; the upper part adopts a plane thrust ball bearing 10 which is used for bearing axial load; axial and radial loads on the shaft are completely transmitted to the rotating component through the three sets of bearings, and the running strength and stability of the rotating mechanism are ensured. In order to solve the radial sealing problem between the rotating disc 9 and the bearing positioning plate 11, the labyrinth seal is adopted in the embodiment; in order to solve the problem of the series motion between the bearing positioning plate 11 and the conical thrust bearing support plate 4, a groove is milled in the conical thrust bearing support plate 4 to ensure the uniqueness of the position. Similarly, a groove is milled between the self-aligning bearing 2 and the self-aligning bearing supporting plate 3 to ensure the bearing positioning.

Example 2

The embodiment discloses a transmission and sealing structure of a bracket of a shot blasting machine, which has the same structure as the embodiment, and is different from the embodiment in that a labyrinth seal is arranged between a bearing positioning plate 11 and a rotating disc 9; the labyrinth seal channel clearance is 1.5 mm. Too large a channel clearance easily causes the invasion of materials, and too small a channel clearance easily causes the friction between a rotating part and a static part. The length of the labyrinth seal passage in each direction is 10 mm. The labyrinth seal direction was changed 6 times.

On the self-aligning bearing backup pad 3, be provided with the recess with self-aligning bearing 2 outline complex with the department that combines of self-aligning bearing 2, the recess degree of depth is 3 mm.

And a groove matched with the outer contour of the bearing positioning plate 11 is arranged at the joint of the conical thrust bearing supporting plate 4 and the bearing positioning plate 11, and the depth of the groove is 1 mm.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A shot blasting machine bracket transmission and sealing structure is characterized by comprising a chain wheel, a self-aligning bearing supporting plate, a conical thrust bearing supporting plate, a bearing positioning plate, a chain wheel shaft, a thrust bearing, a rotating disc and a planar thrust ball bearing, wherein the top and the bottom of the chain wheel shaft are respectively and coaxially fixed with the rotating disc and the chain wheel; a labyrinth seal is arranged between the bearing positioning plate and the rotating disc;

2. The shot blasting machine carrier transmission and sealing structure of claim 1, wherein the labyrinth seal channel clearance is 1.5-2 mm.

3. The shot blasting machine carrier transmission and sealing structure as claimed in claim 1 or 2, wherein the length of the labyrinth seal passage in each direction is 10-15 mm.

4. The shot blasting machine carrier transmission and sealing structure as claimed in claim 1 or 2, wherein the labyrinth seal direction is changed 6-8 times.

5. The shot blasting machine carrier transmission and sealing structure of claim 1, wherein the groove depth is 1-3 mm.

6. The shot blasting machine carrier transmission and sealing structure of claim 1, wherein the thrust bearing is a tapered roller thrust bearing.