PIV Gear Train
What is PIV Gear Train?
The simple and efficient PIV variator is a good alternative to an electric drive: from machine tools to paper production lines, from packaging machines to pump drives.
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| Internal Gear Arrangement of PIV Gearbox |
The most important features are:
- Simple maintenance and high efficiency that enables economical solutions, even in continuous operation, & high speed setting accuracy.
- The features of the 'torque converter' permit high torques at small speeds.
- High control precision
- High system protection for operation in dirty environments.
- Continuous oil lubrication
- Suitable for horizontal or vertical mounting
- Operationally reversible
PIV Operation
At the heart of the PIV
unit is all metal slatted chain and the grooved wheel faces. The slats in
the chain move laterally to engage the grooves in the wheel faces.
Therefore, the chain cannot slip. The pitch diameter of both pairs of wheel
faces is controlled to an infinite number of positions by the pivoting control
levers and the control screw.
PIV – Flat Link Chain
Design
The chain consists of
links, the number of which depends on the size and regulation range of drive
conversion units. Chain links are assembled from pressed steel plates
coupled by pivots. Chain ends are coupled by a closing pivot into an
endless chain and prevented by a split pin from slipping out. These
pivots are cold riveted, and the holes for pivots are provided with hardened
casings.
In the chain links
– perpendicular its axis – these is a jacket fixed in which there is
mounted a bundle of flat links. The flat links are push fitted in an
axial direction. Flat links movement is determined by function position
of drive conversion unit.
PIVs are used heavily in
the paper, textile, printing, metalworking, powdered metal, and chemical
industries. They may, however, be present on virtually any equipment requiring
an adjustable speed output or straight gear reduction. Due to the negligible
power losses the variator performs with very high efficiency, even when running
under partial load.
Their essential qualities are: Minimal maintenance-expenses and high efficiency
enables economic solutions, even at continuous operating. High control precision.
The qualities of the” torque-transformer” admits high torques also with low speeds.
Extensive accessories: remote control units, tacho-generators, speed signaling
potentiometers, limit switches, electronic speed-control systems. The high
protection-type allows to operate in dirty environments without expensive
additional features.
PIV Mechanical Variable speed gear box ( D- DRIVE ) Power Rating - 0.37 Kw to 15 Kw
D- Drive is a variable
speed geared motor, robust step less unit suitable for various industrial
applications.
The unit is designed to provide low output speed at corresponding high output torque. The drive unit is manufactured from standard components and comprises of AC squirrel cage motor, variable speed drive and gearbox with case hardened profile ground helical gears. It can be easily adapted to any machine design. The unit is very compact and save time and money because they are ready to fit drive modules. The interior part of this drive is the variable speed pulley enclosed in a housing and connected to the gearbox and motor. The speed variation can be achieved by means of a hand wheel. Average life to be expected is about 10 years before major maintenance. Belt life would depend on application and environment. General experience is about 3 to 4 years life.
Features:
- · Speed variation ratio 6:1
- ·
Speed adjustment while the machine is in
operation.
- ·
Lifetime lubricated.
- ·
Foot and Flange mounting to suit any
position.
- ·
Suitable for hazardous outdoor and dusty
locations.
- ·
Choice of Flame proof / TEFC / Brake
motors.
- ·
Optional remote control and speed
indicator.
HOME ASSIGNMENT ACTIVITY BY:
TY_ME_C DIV_BATCH B1_GROUP 3
Course: DYNAMICS OF MACHINE
- 05 - Abhishek Kumbhar
- 07 - Gokarna Lele
- 11 - Murali Madgundi
- 25 - Yuvraj Marane
- 26 - Aakash Mate
GUIDED BY : Prof. RAJKUMAR BHAGAT
