VARIABLE HELICAL GEARED MOTOR

Low Speed High Torque

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0.5 H.P. to 20 H.P.

30/2.8 - 200/18.75 Output RPM

Long Life

Noise Free

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Support & Assitance Provided

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On Time Deliveries

Overview

Modern manufacturing demands high productivity – to manufacture as much as possible as fast as possible – with high accuracy and reliability. A variable speed drive is a device which is used to control the speed or torque generated by an electric motor.

The primary function of a variable speed drive (VSD) is to control the flow of energy from the mains to the process. Variable-speed drives sit between the electrical supply and the motor. Power from the electrical supply goes into a drive and the drive then regulates the power that is fed to the motor. All these motors run on electricity.

In order to do their work of providing torque and speed, they need the corresponding amount of electric energy. All these motors consume electricity to provide the torque or speed needed. If that torque or speed is too high or too low, mechanical controls will be used to slow down the shift or control output.

The result is inefficiency, with lots of wasted materials and energy. Motor’s speed should match exactly what is required by the process. Without a better way to control the speed, a lot of energy gets wasted and that’s not good for anyone’s business.

Benefits:

Variable speed drives (VSDs) improve the energy efficiency of your various applications, such as pump, fan, conveyor and compressor systems:

1. Improved operational efficiency
2. Savings on the electricity bill
3. Savings in capital expenditure
4. Savings in maintenance and spare part costs

This type of valuable gain can be achieved not only in large industrial operations but also in smaller installations as well.

Specifications

Technical Specifications

Selection for Variator with Helical Gearbox [ Variable Helical Geared Motor]
MODEL H.P 1 2 3 4 5 – 6 7 – 8 9 -10 11 – 12 13 -14 15 16 17 18 -19 20 21
Ratio 3 3.5 4.5 5 6 7.5 10 12.5 15 20 22.5 25 30 35 40
EUVGM1+ H 0.5 50 50 50 50 50 50 50 50 50 60 60 60 60 60 70
EUVGM1+ H 0.75 50 50 50 50 50 50 50 50 50 60 60 60 60 60 70
EUVGM1+ H 1 50 50 50 50 50 50 50 60 60 60 60 70 70 70 70
Ratio
EUVGM2.5+ H 1.5 80 80 80 80 80 80 80 80 80 80 80 80 80 80 90
EUVGM2.5+ H 2 80 80 80 80 80 80 80 80 80 80 80 80 80 90 90
EUVGM2.5+ H 3 80 80 80 80 80 80 80 80 90 90 90 90 90 100 100
Ratio
EUVGM6+ H 5 100 100 100 100 100 100 100 100 100 100 112 112 112 125 125
EUVGM6+ H 7.5 100 100 100 100 100 100 112 112 112 125 125 125 125 140 140
Ratio
EVUGM16+ H 10 125 125 125 125 125 125 125 125 125 125 125 125 125 140 140
EVUGM16+ H 12.5 125 125 125 125 125 125 125 125 125 125 140 140 140 160 160
EVUGM16+ H 15 125 125 125 125 125 125 125 125 140 140 140 140 160 160 160
EVUGM16+ H 20 140 140 140 140 140 140 140 140 140 140 160 160 160 160 160

Features

Salient Features

Speed Variations:

By feeding fixed speed to Variator, steeples speed variation can be obtained from

  • Max. Speed = 1.7 x Input speed to
  • Min. Speed = 1/7 x input speed
  • Max.Speed/Min.Speed = 12:1 to 3:1 depending upon selection

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Torque Multiplier:

When speed is reduced, Variators can replace Gear Boxes.

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Speed Multiplier:

Up to 1.7 times input speed without necessity of speed increasing gear.

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High Output Torque – Over Load Capacity:

Up to the standstill of an electric motor of the same power acting as a mechanical clutch.

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High Efficiency:

Overall 85% throughout full speed range ideally used for constant power transmission applications in all types of Industries.

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Speed Holding:

Quite stable with uniform load and within 0.25% with Max. Load.

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Reliability:

Drive is highly reliable with long life as load is equally distributed on number of conical Rollers, which are hardened, and ground to close tolerance.

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Simple Design:
Can be attended by skilled fitter as no electronic/electrical parts/circuits are involved.

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Compactness:
High Power Transmission capacity with small dimensions.

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Speed Control:
Quick and simple. By rotating control knob in running condition only.

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Free From Noise And Vibrations:
No moving parts like Chins, Belts, etc. Drive is through rolling action of PRECISION ROLLERS, which are continuously lubricated. All components are well balanced.

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Bi-directional Rotation Of Output Shaft:
Clockwise/Anti Clockwise depending upon Input shaft rotation, viz. Anti Clockwise/Clockwise respectively.
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Totally Enclosed Unit:
Ideal for hazardous zones.
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Maintenance:
Practically maintenance free. Only ensure proper lubrication.
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Collinear Input & Output Shaft:
In-Line Input and Output Shafts.
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Before Selecting the Variator Consider Following:

Load Factors:

  • Uniform load: 1
  • Medium shock load: 1.5
  • Heavy shock load: 2

Service factors:

  • 8 Hours running – 1
  • 16 Hours running – 1.25
  • 24 Hours running – 1.5

Efficiencies of various driving elements used in drive system.

For frequent start/stop, reversal operation, and high moment of inertia load consult us

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For Further Reduction Use At The Output Shaft Of The Variator:

  • Chain drive (positive)
  • Belt drive (slip occurs) For reduction up to 4:1
  • Suitable reduction gear boxes (worm/helical) by Elmrad

Uses

Variable Helical Geared Motor Uses and Applications

We shall use fA to designate the application factor (Ca or Ka in AGMA standards and Ka in ISO standards) pr external overload factor deriving from the operating characteristics of the driving and driven engines are defined according to uniform operation. Operation with light shocks and operation with medium shocks: also three classes of driven machine are defined according to uniform loads, medium shock loads, or heavy shock loads. Consult Table 1 for a general explanation.
Table 1 :-
Driven Machine
U M S
Uniform Operation Electric Motors, Turbines, Hydraulic Motors 1 1.25 1.75
Operation With Light Shocks Combustion engine with 4-6 cylinders 1.25 1.5 2
Operation With Medium Shocks Combustion engine with 1-6 cylinders 1.5 1.75 2.25
U = Machine with Uniforms Load
M = Machine with Medium Shock Load
S = Machine with Heavy Shock Load
Application Factors:
Load Factor Application Sector
U
M
AGITATORS
Uniform Product Density
Variable Product Density
U
M
ALIMENTARY
Mashers, Boilers, Screw feeders,
Blenders, Peelers, Cartoners
(1) U, M
M
S
WINCHES
Lifting
Dragging
Reel Winders
U
M
S
PEPER MILLS
Winders, Dryers, Couch Rolls,
Mixers, Extruders, Thickeners,
Cutters, Glazing Cylinders
M
S
CHEMICAL
Extruders, Printing Presses
Mixers
U
M
M
COMPRESSORS
Centrifugal
Rotating
Axial Piston
M
S
DREDGES
Conveyors
Extractors, Cutter Head Drives
M
M
S
BUILDING
Cement Mixers, Screw Feeders
Crushers, Batchers
Stone Breakers
U
M
M
ELEVATORS
Belt Type, Escalators
Bucket Conveyors, Hoists, Skip Hoists
Public Lifts, Mobile Scaffolding
M
M
(1) U, M
CRANES
Translation
Slew
Lifting
M
M
M
WOOD
Stackers
Transporters
Saws, Thicknessers, Routers
M
M
S
MACHINE TOOLS
Boring Machines, Broaching Machines, Shearing Machines
Bending Machines, Press Forgers
Power Hammers, Rolling Mills
U
M
MIXERS
Uniform Density Product
Variable Density Product
S
M
EARTH MOVING MACHINERY
Rotating Shovel Excavators
Transporters
U
M, S
M, S
PUMPS
Centrifugal
Double Acting Volumetric
Single Acting Volumetric
U
M
CONVEYORS
On rails
Belts
M
M
U
WATER TREATMENT
Screw Feeders, Disintegrators
Mixers, Settlers
Oxygenators
U
M
FAN UNITS
Small
Large

Mounting Dimensions

Mounting Dimensions

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