Shaft end sealing structure of screw conveyer

Abstract

The utility model discloses a shaft end sealing structure of a spiral conveyer in the field of spiral conveyors, which comprises a conveyer shell, a rotating shaft rotatably arranged in the conveyer shell, spiral blades arranged on the periphery of the rotating shaft, an opening arranged at the end part of the conveyer shell, and a bearing seat arranged corresponding to the conveyer shell, two first bearings which are spaced front and back are coaxially arranged in a mounting hole in the bearing seat, a coaxial supporting shaft body is integrally arranged at the rear end of the rotating shaft, the outer diameter of the supporting shaft body is smaller than that of the rotating shaft, and a second bearing is coaxially arranged in the mounting hole of the bearing seat. A sealing piece is arranged in the mounting hole of the bearing seat corresponding to the supporting shaft body, and the supporting shaft body sequentially penetrates through the sealing piece, the second bearing and the two first bearings. The sealing performance of the rotating shaft can be improved, and the problem of material leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of screw conveyer, in particular to a screw conveyer shaft end sealing structure. BACKGROUND

[0002] The screw conveyer is a kind of machinery that realizes conveying by using motor to drive screw rotation and push material.It can convey horizontally, obliquely or vertically, and has the advantages of simple structure, small cross-sectional area, good sealing performance, easy operation, easy maintenance and convenient closed transportation.Currently, the screw shaft of screw conveyer passes through the shell and is connected with the reduction motor, but the sealing performance of the screw shaft is poor, which leads to material leakage. SUMMARY

[0003] The utility model discloses a screw conveyer shaft end sealing structure, which can improve the sealing performance of the rotating shaft and avoid material leakage.

[0004] The utility model discloses a screw conveyer shaft end sealing structure, which can improve the sealing performance of the rotating shaft and avoid material leakage.

[0005] When working, the extension end of the support shaft body is connected with the reduction motor, the rotating shaft rotates, the two bearings one support the rotating of the support shaft body, and the bearing two is a plane bearing, which makes the rotating shaft end surface rotate smoothly, the sealing element improves the sealing performance and prevents material leakage.Compared with the prior art, the utility model has the advantages of improving the sealing performance of the rotating shaft and avoiding material leakage.

[0006] As a further improvement of the utility model, the bearing seat front end is equipped with flange one, the conveyer shell rear end is equipped with flange two, the flange two is fixedly connected with the flange one through a plurality of circumferentially distributed fasteners, the bearing seat rear end is provided with end cover, and the support shaft body passes through the end cover and is arranged.

[0007] As a further improvement of the utility model, the bearing one is a plane thrust bearing, and the bearing two is a deep groove ball bearing.The plane thrust bearing bears axial and radial load at the same time, so that the rotating shaft rotates smoothly.

[0008] In order to position bearing one, bearing two, the mounting hole inner wall of the bearing seat is provided with an annular inner step body, two bearing ones are respectively attached to the front and rear ends of the inner step body, an end cover is arranged corresponding to the bearing one at the rear end, the mounting hole inner wall of the bearing seat is provided with an annular mounting groove one and a mounting groove two respectively at the front of the step body, the radial depth of the mounting groove one is greater than that of the mounting groove two, a sealing element and a bearing two are respectively arranged in the mounting groove one and the mounting groove two, the sealing element and the bearing two are arranged at intervals, and the front end of the bearing two is attached to the end surface of the rotating shaft.

[0009] As a further improvement of the utility model, the mounting hole inner wall of the bearing seat is provided with an annular limiting plate located at the front side of the sealing element.

[0010] As a further improvement of the utility model, the sealing element is an oil seal or a sealing ring. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of the utility model.

[0012] Figure 2 It is Figure 1 It is an enlarged view of A in the figure.

[0013] Among them, 1 conveyor shell, 2 rotating shaft, 2a support shaft body, 3 helical blade, 4 bearing seat, 4a inner step body, 4b mounting groove one, 4c mounting groove two, 5 bearing one, 6 bearing two, 7 sealing element, 8 flange one, 9 flange two, 10 fastener, 11 end cover, 12 limiting plate. DETAILED DESCRIPTION

[0014] As Figure 1 and 2 As shown in the figure, it is a kind of helical conveyor shaft end sealing structure, including conveyor shell 1, the rotating shaft 2 is rotatably arranged in the inside of conveyor shell 1, the rotating shaft 2 outer periphery is provided with helical blade 3, the end of conveyor shell 1 is provided with opening, and the bearing seat 4 is arranged corresponding to conveyor shell 1, the mounting hole inside of bearing seat 4 is coaxially provided with two front and rear interval bearing one 5, the rear end of rotating shaft 2 is integrally provided with coaxial support shaft body 2a, the outer diameter of support shaft body 2a is less than the outer diameter of rotating shaft 2, the mounting hole inside of bearing seat 4 is coaxially provided with bearing two 6, the mounting hole inside of bearing seat 4 is provided with sealing element 7 corresponding to support shaft body 2a, and support shaft body 2a passes through sealing element 7, bearing two 6 and two bearing one 5 in sequence and is arranged.The front end of bearing seat 4 is provided with flange one 8, the rear end of conveyor shell 1 is provided with flange two 9, flange two 9 and flange one 8 are fixedly connected by a plurality of circumferentially distributed fasteners 10, the rear end of bearing seat 4 is provided with end cover 11, and support shaft body 2a passes through end cover 11 and is arranged.

[0015] The bearing one 5 is a plane thrust bearing, and the bearing two 6 is a deep groove ball bearing. The plane thrust bearing bears axial and radial loads at the same time, so that the rotating shaft 2 rotates smoothly. In order to position the bearing one 5 and the bearing two 6, an annular inner step body 4a is arranged on the inner wall of the mounting hole of the bearing seat 4, the two bearing ones 5 are respectively attached to the front and rear ends of the inner step body 4a, the end cover 11 is arranged corresponding to the bearing one 5 at the rear end, annular mounting grooves one 4b and two 4c are respectively arranged on the inner wall of the mounting hole of the bearing seat 4 and located in front of the step body, the radial depth of the mounting groove one 4b is greater than that of the mounting groove two 4c, the sealing element 7 and the bearing two 6 are respectively arranged in the mounting groove one 4b and the mounting groove two 4c, the sealing element 7 and the bearing two 6 are arranged in a spaced manner, and the front end of the bearing two 6 is attached to the end surface of the rotating shaft 2. The inner wall of the mounting hole of the bearing seat 4 is provided with an annular limiting plate 12 located in front of the sealing element 7. The sealing element 7 is limited. The sealing element 7 is an oil seal or a sealing ring.

[0016] In the working process of the utility model, the extending end of the support shaft body 2a is connected with the speed reducer motor in transmission, the rotating shaft 2 rotates, the two bearing ones 5 rotate and support the support shaft body 2a, the bearing two 6 is a plane bearing, so that the end surface of the rotating shaft 2 rotates smoothly, the sealing element 7 improves the sealing performance and prevents material leakage. The utility model has the advantages that the sealing performance of the rotating shaft 2 is improved, and the problem of material leakage is avoided.

[0017] The utility model is not limited to the above-mentioned embodiments, on the basis of the technical scheme disclosed in the utility model, the skilled in the art can make some substitutions and deformation to some technical features according to the disclosed technical content without creative labor, and these substitutions and deformation are all within the protection scope of the utility model.

Claims

1. A screw conveyor shaft end sealing structure, comprising a conveyor housing, a rotating shaft rotatably disposed inside the conveyor housing, helical blades disposed on the outer periphery of the rotating shaft, and an opening provided at the end of the conveyor housing, characterized in that, A bearing housing is provided corresponding to the conveyor housing. Two bearings (bearing 1) are coaxially arranged in the mounting hole inside the bearing housing, spaced back to back. A coaxial support shaft is integrally provided at the rear end of the rotating shaft. The outer diameter of the support shaft is smaller than the outer diameter of the rotating shaft. A bearing (bearing 2) is coaxially arranged in the mounting hole of the bearing housing. A seal is provided in the mounting hole of the bearing housing corresponding to the support shaft. The support shaft passes through the seal, bearing 2, and the two bearings (bearing 1) in sequence.

2. The screw conveyor shaft end sealing structure according to claim 1, characterized in that, The bearing housing has a flange one at the front end and a flange two at the rear end of the conveyor housing. The flange two and flange one are fixedly connected by several circumferentially distributed fasteners. The bearing housing has an end cover at the rear end, and the support shaft passes through the end cover.

3. The screw conveyor shaft end sealing structure according to claim 2, characterized in that, The first bearing is a planar thrust bearing, and the second bearing is a deep groove ball bearing.

4. The screw conveyor shaft end sealing structure according to claim 3, characterized in that, The inner wall of the mounting hole of the bearing housing is provided with an annular inner step. Two bearings are respectively attached to the front and rear ends of the inner step. The end cap is set corresponding to the rear bearing. The inner wall of the mounting hole of the bearing housing is provided with an annular mounting groove 1 and a mounting groove 2 in front of the step. The radial depth of the mounting groove 1 is greater than the radial depth of the mounting groove 2. The seal and the bearing are respectively installed in the mounting groove 1 and the mounting groove 2. The seal and the bearing are spaced apart. The front end of the bearing is attached to the end face of the rotating shaft.

5. The screw conveyor shaft end sealing structure according to claim 4, characterized in that, The inner wall of the mounting hole of the bearing housing is provided with an annular limiting plate located in front of the seal.

6. A screw conveyor shaft end sealing structure according to any one of claims 1-5, characterized in that, The sealing element is an oil seal or a sealing ring.

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