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Customer Technical Bulletin No. 69
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Drawn: Aug. 22, 2000ECN8361
Collared Coupling Retaining Bolt Rotary Compressors
In a continuing effort for product improvement and to reduce
product packaging costs,Ariel now offers a special low profile
collared retaining bolt (CRB) for use on AR seriesrotary compressor
drive coupling hubs. It is designed to minimize the coupling
hub
counterbore depth for selected coupling designs. The CRB can
allow the use ofstandard, semi-finished coupling hubs for reduced
torque compressor applications.
The rotary compressor is driven through a coupling, which is
attached to the tapered,keyed shaft end of the male rotor. A
compressors rotating speed, operating conditions,
process gas composition, and the resulting torque requirement,
determine thecouplings size and hub retaining method.
The standard bolt and washer retaining method was originally
developed forrefrigeration service in high horsepower applications
that require the use of a special
coupling hub design.
The new CRB is designed to facilitate the use of standard size
coupling hubs commonly
used in natural gas applications. Natural gas and other
non-refrigeration compressorapplications can involve less than the
maximum allowable shaft horsepower and torque.
Ariels engineering reference ER-41 Rotary Compressor Coupling
Hub Installation &
Retention provides details and application limitations for the
use of CRBs.
Installation and removal of the CRB requires the use of an Ariel
supplied torquing
adapter tool. The tool applies torque using dowel pins and
adapts to a standard 1/2 or3/4 drive torque wrench, see attached
drawings.
For new unit reduced-torque applications, the CRB option can be
specified through Ariel
Order Entry.
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Customer Technical Bulletin No. 69
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Drawn: Aug. 22, 2000ECN8361
Ariel Telephone and Fax Numbers
Switchboard 740-397-0311 8 am to 5 pm Eastern Time (weekdays
only).
General Fax 740-397-3856
Field Service 740-393-5052 Emergency from 5 pm to 8 am
weekdays,
and 24 hours weekends and holidays.
Spare Parts 740-397-3602 For all calls to Spare Parts Group, day
or night.
Spare Parts Fax 740-393-5054
The after hours system works as follows:
1. Dial number.
2. Calls are answered by voice mail.
3. Leave a message (name, phone number, brief description of
requirements).
4. The call will be directly routed to an appropriate person,
and returned as soon
as possible.
Users must order all parts thru Authorized Distributors.
