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Testing Equipments

Fling test


Armature Fling Test and Commutator Burst Test Rig

High-speed Fling and burst Test Rig shall be designed to meet the following test requirements.

No. Name Description

The details are subject to change and customizable to orders.
1 Proof Testing The flinging of armatures by free running the test object at pre-settable speeds between 20,000 rpm & 40,000 rpm for a pre-settable time, and by verification by physical dimensional measurements on the test object. For commutator burst test – The speed to be between 20000 & 50000 RPM.
2 Burst Testing To evaluate the speed, at which the Test Object bursts due to the action of centrifugal forces… expected to occur below the maximum test bench speeds up to 50,000 rpm. (A suitable arrangement around the commutator at Comm OD + 0.2mm could be made to sense and provide stop signal).
3 Operator Safety To provide adequate safety to the operator as well as to the test bench components when such high energy bursting takes place.
4 Automatic Burst test sensing The test rig shall have a means to detect onset of bursting or cracking, by means of a Spot sensor.
The test rig consist of the following

1. Mechanical assembly
2. Electrical assembly
3. PLC

Mechanical assembly
01. Table
02. Fixture to mount the armature center to center loading
03. Bearing Block for driving
04. Center drive with Bearing
05. Motor mounting bracket
06. Belt
07. Component sensor mounting bracket
08. Winding fling sensor mounting Bracket
09. Commutator Fling sensor mounting bracket
10. Safety Guard
11. Automatic Lubrication system for Bearing block


Electrical assembly
01. 7.5 Hp three phase induction Motor
02. 7.5 Hp Motor Drive 03. Contatctors
04. Component sensor
05. Spot sensor to sense winding fling
06. Spot sensor to sense commutator fling
07. Cables and wires 08. Relay cards
09. PLC
10. Expansion unit
11. RPM meter with sensor


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Module Specifications
No. Name Description

The details are subject to change and customizable to orders.
1 PLC • Make : Siemens
• Model : S7 200 CPU with O/p Module
• TD 200 Text display
2 Motor • Make : ABB
• Model : 7.5 HP three phase 2880 RPM
3 Motor drive • Make : ABB
• Model : ACS 400
• Input : three phase 440 V AC
4 RPM meter • Make : Selectron or Autonics
• Model : 5 digit rate /RPM meter
• Input : 230 V AC
5 Bearing • Make : FAG
• Model : HCS 7005 with ceramic ball
• Input : HCS 7005 C.T. PGS02 FAG


Sequence of operation in Auto mode

1. Load the armature manually
2. Clamp the armature by adjusting the center to center
3. Close the safety door
4. Start the test using start key
5. Motor will run in set speed for set duration
6. Component sensor, winding fling sensor and Commutator fling sensor continuously monitor the status
7. Either winding or Commutator is opened then the PLC will stop the motor immediately and indicates ERROR with ALARM
8. After set time is over motor is stopped
9. Test status is indicated through MMI

Manual mode of operation
• Individual on /off Available for all the outputs
• On time setting available through MMI

Test Rig Specifications
No. Name Description

The details are subject to change and customizable to orders.
1 Input 3 phase 440 V AC 8 KW
2 Table size 500W X 750L X 900H mm
3 Panel size 600 X 1200 X 300 mm
4 Operator panel 400 X 300 X 200
5 Maximum speed 50000 RPM Achieved with in 6 sec’s
6 Component clamping Center to center holding
7 Length to Hold 100 mm to 250 mm Adjustable
8 Maximum weight to hold 10 Kg
9 Fling sensor for winding sensing Accuracy of 0.2 mm
10 Commutator fling sensor sensing Accuracy 0.2 mm
11 Commutator Diameter to sense 20 dia to 80 dia
12 Armature core Diameter sense 40 dia to 120 dia
13 Maximum On time 3 minutes
14 No of on Cycles 5 per hour
15 Lubrication Automatic Lubrication system
16 Loading Manual
17 Unloading Manual
Safety
• Safety door with limit switch inter lock
• Brake arrangement to stop immediately


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