Saturday, April 17, 2010

How Filters can cost you Big !

How Filters can cost you Big ?????




You have probably heard that the old story; 
Compressed Air Filter Differential Pressure can cost you extra Energy ?

About 1% more power is consume for every 2 psi higher compressor  discharge pressure.







Ingersoll Rand EP100 air compressor [with 86 kw main motor] overhaul;

Main Motor and Air End;
Penang, Malaysia, on the 15th April 2010


The Air End to be overhaul; awaiting dismantle
Note: 
the check valve [ Non return valve ] with the arrow of flow.









The male rotor DE bearing's outer race.






Both the bearings of the rotors at the front end, where the gear box is.





Male rotor shaft on the left,

Note:
The worn out male rotor drive bearing






The rotors waiting to be push out from their cocoon [Compressor case / Housing ].









The Air End rotors' after the NU type of bearings being remove.









The Air End rotors' after the NU type of bearings being remove.
Both male and female rotors.








The pressure end side, note the tapered bearings.








The Air End cover, the high pressure side.
There is overheating at this end.







Shaft seal to prevent compressor oil [ Coolant ] from leak into the motor windings





The shaft seal is install here. [ inside ]







The dismantling of the Air Compressor main motor.


Non drive end [ NDE ] side of the main motor.
with it's cover on the cement floor.





Showing the stator and rotor shaft with motor shaft bearing.










NDE motor cover






Drive end [ DE ] side of the main motor








The DE bearing cover,








The DE bearing cover, front is the gear box side.










The motor after dismantle, prepare to clean by air jet.
Lot of white powder from the rubber glove manufacturing facilities.






Prepare the motor coil for varnishing.

















After re-varnishing the Stator Coil.








Air End Failure due to lack of Lubrication.



It is A Quincy 30 hp screw air compressor of the male rotor end bearings.


How to save costs Air Compressors for your Operation?
What should you do to reduce energy cost?


Answer !!!!!
Purchase parts & accessories direct from Manufacturer?
Use parts & Accessories from branded suppliers?
Use of parts from NON branded suppliers?
The lowest or cheapest price available?
The lowest or cheapest branded parts?
The lowest or cheapest branded parts from branded suppliers?
Prefer to deal via agents or dealers ( approved or self-claimed ), instead of manufacturers?
If you are seeking or exploring alternative solutions; please do not hesitate to contact us for discussion.

Variable Speed Drives

Variable Speed Drives:

*****
Energy Saving in Air Compressors Operation;
*****

Transmission Losses

Losses due to belt drive = 4 to 6 % due to slip
Losses using Gear Drive = 1 to 2 % due to gaps between tooth.
Losses on Induction motor = Motor efficiency

Example:
friction, heat, eddy current, etc., also known as Power Factor.

*****
Direct Drive Motor has the highest transmission efficiency
close to 100%



NO load speed (RPM) of electric motor
= (Hz X 60 X 2) / no. of poles

Example:
for a two pole Induction motor.

using formulae:
(Hz X 60 X 2) / 2 = (50 X60 X2)/2 = 3000 rpm.

Example: 
4 pole motor.

( Hz X 60 X 2 ) / 4 = (50 X 60 X2 ) / 4 = 1500 rpm.

Unload power cost:

The most inefficiency operation in a screw air compressors is at unload.
The energy cost you pay without getting any compressed air for usage. It cost you from 30% to 60% FLA when off-load.

Why?

1.
It need oil to circulate the system and some air for pneumatic control system. ( usually 15 psig ). ( oil to lubricate ).

2.
Need to cool the oil and air system.






Based on 2 pole standard motor;

Motor Speed at various frequency : 

20 Hz;
( 20 X 120 X 60 ) / 2 = 1200

25 Hz:
(25 X 120 X 60 ) / 2 = 1500

30 Hz:
( 30 X 120 X 60 ) / 2 = 1800

35 Hz:
( 35 X 120 X 60 ) / 2 = 2100

40 Hz;
( 40 X 120 X 60 ) / 2 = 2400

45 Hz;
( 45 X 120 X 60 ) /2 = 2700

50 Hz;
( 54 X 120 X 60 ) /2 = 3000









HRDF Claimable Training on Air Compressors









Testimonial from Institute Latihan Perindustrian, Jitra, Kedah for conducting a one day workshop on Basic Air Compressor course to teachers and students of the Institute.






From Almig Compressor of Germany. The number Air Compressor Company in Germany, 

The hot bed of compressor manufacturer and air end manufacturing.

















You will learn in one year, what others take at least three to five years to learn this much.



Rotary Screw Air Compressor Overhaul !

Rotary Twin Screw Air Compressor Overhaul; 

 

What is the HRD Levy?

The HRD (Human Resources Development) Levy is a mandatory employer contribution, typically a percentage of employee salaries, to fund programs improving the national workforce's skills in Malaysia. 



Companies with 10 or more employees are required to contribute, while those with 5 to 9 employees can opt to register, though it's not obligatory.

How To Calculate the HRD Levy

Unutilised HRD Levy Forfeiture

Starting in 2020, Section 25 of the PSMB Act 2001 shortens the timeframe for forfeiting unclaimed HRD Levy funds to 2 years instead of 5. If no claims are made within this period, your Levy contributions from two years ago will be forfeited until RM10,000 remains.

 

Act quickly to claim valuable financial assistance and benefits for your businesses.

 









14th April 2010 Penang, Malaysia. Model: 

CompAir Broomwade N6090, imported version [ not sold locally ] Front showing the drive coupling, behind the shaft is the gear box.







           








Pinion shaft of drive gear, gear box housing Compressor case, note the size; The bigger size hole is for male drive rotor. The smaller size on the left is the female rotor, driven. 
The end plate, note the wear on the surface on the bigger rotor. 


Cause by some foreign metal particles.

















Gear case housing Driven rotor, that is the female rotor. 









Drive rotor, this case is the male rotor. The gear on the floor is mounted in the gear box to the drive shaft of the main motor, this gear will drive the smaller size gear install on one end of the male rotor shaft.