Technology

New Hiscrew Oil Next-Hiatchi air compressor

New Hiscrew Oil Next-Hiatchi air compressor

Hitachi compressor oil is produced by Hitachi - one of the Japanese industrial machine brand. Hitachi is a specialized compressor oil for Hitachi air compressor.
Dyna air compressor

Dyna air compressor

 DYNA air compressors are originated from ROTORCOMP- A leading global cooperation of screw manufacturing techniques which is famous for German pressure technology. Currently DYNA compressors are manufactured with German technology and assembled in Taiwan.

Guidelines for inspection of Handsome II

Inspection intervals and inspection items depend on the installation site as well as operating conditions. The table below provides the rough guidlines. Sound operation is expected if the guidelines are followed.
Air end repairs

Air end repairs

After air end diagnostics, our engineers estimate the necessary repairs and provide calculation of the repairs and necessary spare parts
Sung Shin - VSD air compressor

Sung Shin - VSD air compressor

Variable Frequency Driver (VFD) -reducing energy consumpsion system is produced with the required amount of air and compressor shutdown under no-load conditions. In order to minimize unnecessary energy loss through the inverter to adjust the number spin of compressor Energy consumption saving arises starting by reducing the starting current as the inverter is operated.

How to detect the failure of air compressor motor

Wednesday - 02/01/2019 03:31

How to detect failures of  air compressor motor

 Currently, Most air compressor using 3-phase asyncronous motor( high capacity air compressor)  and air compressor using 1 phase electric motor( low capacity air compressor). Druring using and operating time , there are many incidents due to electric motor failure such as: Short circuit, electric motor fire, clogged motor, low load, excessive vibration and quick-heated machine. When you connect to  the power supply, the protective equipments are reacted immediately ( Contactor is broken. Engine runs with sufficient speed but 3 phase electric current is unbalanced ...In order to help you earlier detect symptoms, causes and remedies, this article is recommended.   
dong co 4,Air compressor motor 
Air compressor motor 

1.Some common failure of 3 phase asyncronous motor.  
 

1.1 Motor is quickly overheated, groaning and unable to start when connecting to power supply ( slowly spin or not spin).

- Causes :
+Power supply  loses 1 phase
+ Inner phase of stator is broken 
+ Bearing is worn out so  rotor is clogged 
- Remedies 
+ Check and repair 
power supply wiring, fuses, contactor, main switch
+Measure and check each phase and repair brokren position. 
+ Check the loose of bearing. Repair or replace bearing 

1.2 The protective equipment are reacted immediately after power connection

- Cause 
+ Stator is short-circuited
- Remedies :
+ Check and repair the short-circuited phase. 

1.3 Engine runs with insuffcient speed, strong vibration, quickly -overheated.  
- Causes 

+  Short circuit in Inner coil  
+
The engine is destroyed
- Remedies:
+ Check wirings by Gronha , if it is internaly short-circuited , wrap it. 
+ Recalibrate or replace new bearing .

1.4 Mechanical sound, current is abnomal increase.
- Causes 
+ The cap is not well-fixed to the machine
+Bearing is worn out, shaft is curvied.
- Remedies :
+ Repair and correct mechanical parts.
+ Replace bearing 

1.5 Engine runs with sufficient speed but 3 phase electric current is unbalanced (deviation more than 10% in each phase)
-Causes 
+ Short circuited phases 
- Remesies:
+ Check source voltage  điện áp nguồn
+ Check short-circuited position.
1.6 
The load current is not too high Io> 50% Iđm
- Cause 
+ Poor quality circuit
+ Many winding is shorted-circuit 
- Remedies 
+
Enhance drying. If there is a change, it can be useD, If not it  must be corrected
1.7 Engine can not start while loading 
- Causes 
+ Heavy load 
+ Decrease sourse voltage 
+ Phase loss
- Remedies 
+ Decrease load 
+ Check the sourse voltage 
+ Check power supply

Other article: Six tips to  repair 1-phase asynchronous electric motor, How to read the parameters of bearings, 10 things to know when using bearings,

Minh Phu provides maintenance and repair services for air compressors, in addition Minh Phu also provides spare parts for air compressors with high quality at reasonable prices. For further information, please contact (+84)919 23 28 26. Sincerely thank you for your interest and your trust of our service. How to detect the failure of air compressor motor, air compressor fire, repair motor, add motor grease,

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