SPLIT PLUMMER BLOCK BEARING HOUSING

Abstract

A split plummer block bearing housing for a rotatable shaft includes a detachable housing cap, which includes at least one housing grease channel, and at least one seal assembly. The seal assembly includes a stationary part, which has a seal grease channel and is mounted on the housing, and a rotating part that is configured to be mounted on the shaft. The stationary part and the rotating part are configured to cooperate with each other as a labyrinth and/or contacting seal, and the housing grease channel and the seal grease channel connect and form an extension of each other.

Claims

1. A split plummer block bearing housing for a rotatable shaft, comprising: a detachable housing cap having at least one housing grease channel, and at least one seal assembly, wherein the at least one seal assembly comprises: a stationary part mounted on the housing, and having a seal grease channel, and a rotating part configured to be mounted on the shaft, wherein the stationary part and the rotating part are configured to cooperate with each other as a labyrinth and/or contacting seal, and wherein the housing grease and the seal grease channel connect and form an extension of each other.

2. The split plummer block bearing housing according to claim 1, wherein the at least one seal assembly is mounted in a recess on an axial side of the housing.

3. The split plummer block bearing housing according to claim 1, wherein the housing grease channel and the seal grease channel extend in a substantially radial direction.

4. The split plummer block bearing housing according to claim 1, including a sealing ring at an area where the housing grease channel and the seal grease channel connect.

5. A conveyor pulley assembly comprising the split plummer block bearing housing according to claim 1.

6. The split plummer block bearing housing according to claim 4, wherein the sealing ring comprises an o-ring and/or a quad ring.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0019] Exemplifying embodiments will now be described more in detail with reference to accompanying drawings, wherein

[0020] FIG. 1 shows a cross section of a split plummer block bearing housing according to the invention.

[0021] FIG. 2 shows a cross section of a bearing mounted in a split plummer block bearing housing according to the invention.

[0022] FIG. 3 shows a cross section of a bearing mounted in a split plummer block bearing housing according to the invention.

[0023] DETAILED DESCTIPTION OF THE DRAWINGS

[0024] FIG. 1 shows a cross section of a split plummer block bearing housing 1 according to the invention. The split plummer block bearing housing 1 for conveyor pulleys has a detachable housing cap 2 having at least one housing grease channel 3. An at least one seal assembly 4 comprises a stationary part 5 mounted on the housing 1 and a rotating part 6 intended to be mounted on a shaft 13. The stationary part 5 has a seal grease channel 7. The stationary part 5 and the rotating part 6 forms labyrinth shaped portions 8 and has sealing means 9 contacting each other. The at least one seal assembly 4 is mounted in a recess 10 on the axial side of the housing 1. The housing grease channel 3 and the seal grease channel 7 connects through a channel connection point 11. The housing grease channel 3 and the seal grease channel 7 are directed in a substantially radial direction. The channel connection point 11 has sealing rings 12 in between the seal assembly 4 and housing cap 2, such as o-rings or quad rings.

[0025] FIG. 2 shows a cross section of a bearing 14 mounted in a split plummer block bearing housing 1 according to the invention. The split plummer block bearing housing 1 has sealing assemblies 4 on both sides and a third housing grease channel 3 connecting to the lubrication groove 15 in the radial outer side of the outer bearing ring, for further transportation to the bearing interior through the bearing grease channels 16. The figure shows an SRB which is particularly beneficial in conveyor pulleys, but it could also be other bearing types more suitable to the application, such as CRB, TRB, Toroidal bearing, DGBB etc. The spherical roller bearing in the figure is sealed, which further enhances the sealing properties to reduce contaminants and debris entering the bearing.

[0026] FIG. 3 shows a cross section of a bearing 14 mounted in a split plummer block bearing housing 1 according to the invention, where one axial side of the split plummer block bearing housing 1 is sealed by an axial cap 18. There is still a third inactive housing grease channel 3 portrayed in the figure leading down to the axial cap 18, but it could of course also be taken away completely to reduce machining cost.

[0027] Although the present invention has been described according to a number of preferred embodiments, the examples given are not exhaustive. It will be appreciated by those skilled in the art that additions, deletions, modifications, and substitutions not specifically described herein may be made without departing from the invention as defined in the appended claims.

[0028] A reference herein to a patent document or any other matter identified as prior art, is not to be taken as an admission that the document or other matter was known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims.

[0029] Where any or all of the terms “comprise”, “comprises”, “comprised” or “comprising” are used in this specification (including the claims) they are to be interpreted as specifying the presence of the stated features, integers, steps or components, but not precluding the presence of one or more other features, integers, steps or components.

LIST OF REFERENCE NUMBERS

[0030] 1. Split plummer block bearing housing

[0031] 2. Housing cap

[0032] 3. Housing grease channel

[0033] 4. Seal assembly

[0034] 5. Stationary part

[0035] 6. Rotating part

[0036] 7. Seal grease channel

[0037] 8. Labyrinth shaped portions

[0038] 9. Sealing means

[0039] 10. Recess

[0040] 11. Channel connection point

[0041] 12. Sealing ring

[0042] 13. Shaft

[0043] 14. Bearing

[0044] 15. Lubricating groove

[0045] 16. Bearing grease channels

[0046] 17. Bearing seal

[0047] 18. Axial cap