Re: Screw Conveyor Hanger Bearing
Have you asked the bearing supplier to examine the failed parts and advise the cause of the failure?
The component supplier should always be the first stop in tracking down the cause of a problem. ■
Re: Screw Conveyor Hanger Bearing
Have you asked the bearing supplier to examine the failed parts and advise the cause of the failure?
The component supplier should always be the first stop in tracking down the cause of a problem. ■
Re: Screw Conveyor Hanger Bearing
What is the screw RPM and coupling shaft diameter?
What is the surface finish on the coupking shaft? ■
Re: Screw Conveyor Hanger Bearing
What is the screw RPM and coupling shaft diameter?
What is the surface finish on the coupking shaft? ■
Re: Screw Conveyor Hanger Bearing
Originally Posted by J Dhref="showthread.php?p=62805#post62805" rel="nofollow">
What is the surface finish on the coupking shaft?
Dear Sir
thanks for your interest. find attache PDF copy of general arrangement drg. please go through and let me have your opinion.
Attachments
ga of screw conveyor model (1) (PDF)
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Re: Screw Conveyor Hanger Bearing
Originally Posted by J Dhref="showthread.php?p=62805#post62805" rel="nofollow">
What is the surface finish on the coupking shaft?
Dear Sir
thanks for your interest. find attache PDF copy of general arrangement drg. please go through and let me have your opinion.
Attachments
ga of screw conveyor model (1) (PDF)
■
Re: Screw Conveyor Hanger Bearing
Interesting, I've not seen a hanger bearing made like this before. The one's I'm used to have the pipe ends sleeved down internally and machined to suit a shaft that connects two sections.
Isn't it difficult to get true alignment between the flanges?
Might poor alignment be the reason why your bearings are wearing out? ■
Re: Screw Conveyor Hanger Bearing
Interesting, I've not seen a hanger bearing made like this before. The one's I'm used to have the pipe ends sleeved down internally and machined to suit a shaft that connects two sections.
Isn't it difficult to get true alignment between the flanges?
Might poor alignment be the reason why your bearings are wearing out? ■
Re: Screw Conveyor Hanger Bearing
I'm with designer concerning alignment. In my opinion the 226 style of SCC is supported only by the bolting on the outwing bent flanges, thus enabling alignment within the limits of a greater bore or longhole.
But then it seems that the intermediate shaft pieces at the bearing placements (these are new for me too) are not equipped with a centering flange or so. If those can move within the play between bolt and bore even only at assembly, there's no sufficient alignment to be gained I'd say. And metal bearings will IMO not get the problem solved (That's also not allowed with sugar, isn't it?)
IMO an HOWTO could be:
- Check alignment on existing system
- Check cause of failure with bearing supplier (If it's misalignment they will see, I think)
- Develop alignment improvement tech, a rigid through-shaft coupling maybe, or at least some alignment-by-close-tolerance-guidance.
Regards
Roland ■
Re: Screw Conveyor Hanger Bearing
I'm with designer concerning alignment. In my opinion the 226 style of SCC is supported only by the bolting on the outwing bent flanges, thus enabling alignment within the limits of a greater bore or longhole.
But then it seems that the intermediate shaft pieces at the bearing placements (these are new for me too) are not equipped with a centering flange or so. If those can move within the play between bolt and bore even only at assembly, there's no sufficient alignment to be gained I'd say. And metal bearings will IMO not get the problem solved (That's also not allowed with sugar, isn't it?)
IMO an HOWTO could be:
- Check alignment on existing system
- Check cause of failure with bearing supplier (If it's misalignment they will see, I think)
- Develop alignment improvement tech, a rigid through-shaft coupling maybe, or at least some alignment-by-close-tolerance-guidance.
Regards
Roland ■
Re: Screw Conveyor Hanger Bearing
Unless your centre pipe flanges are machined after all welding is done I agree with previous posts that alignment is likely an issue.
The coupling shaft is called out as SS409. If my memory is correct this is a ferritic stainless steel and under certain environments I have seen this rust like carbon steel. What kind of condition is the coupling shaft in when you replace bearings? If it is rough or rusted that might be wearing your teflon bearing. ■
Re: Screw Conveyor Hanger Bearing
Unless your centre pipe flanges are machined after all welding is done I agree with previous posts that alignment is likely an issue.
The coupling shaft is called out as SS409. If my memory is correct this is a ferritic stainless steel and under certain environments I have seen this rust like carbon steel. What kind of condition is the coupling shaft in when you replace bearings? If it is rough or rusted that might be wearing your teflon bearing. ■
Re: Screw Conveyor Hanger Bearing
Thanks for all the valid suggestions. the flanges are machined and there i agree for a mis alignment in the pipes. we are setting the alignment right. can any body suggest the hanger bearing ( journal ) material of construction. it must be food grade only. ■
Re: Screw Conveyor Hanger Bearing
Thanks for all the valid suggestions. the flanges are machined and there i agree for a mis alignment in the pipes. we are setting the alignment right. can any body suggest the hanger bearing ( journal ) material of construction. it must be food grade only. ■
Sugar-Zacharee
Namaskar,
I would ask the ASGA- American Sugar Growers Association
about what they use or they can ask one of the refiners to contact you.
Also contact boston gear for thier suggestions.
I have enclosed a file for you here.
lzaharis
Attachments
■
Sugar-Zacharee
Namaskar,
I would ask the ASGA- American Sugar Growers Association
about what they use or they can ask one of the refiners to contact you.
Also contact boston gear for thier suggestions.
I have enclosed a file for you here.
lzaharis
Attachments
■
Screw Conveyor Hanger Bearing
Dear all
we have supplied 800 &100 dia screw conveyors to a sugar refinary. One screw conveyor is of 22 m length and having 3 hanger bearings with teflon journals. The capacity of the screw is 140 tph.
Hanger bearing style is 226.
I am facing a problem of frequent worn out and failing of bushes. The frequency of failing is 15 days.
Can any body suggest the suitable arrangement of
1. Type of hanger bearing to be used.
2. Food grade journal material.
3. Increase the life of journal at least for 6 months.
Sugar bulk density is 0.8 t/ cum
moisture content is 30 %.
Please suggest at the earliest. ■