Planetary Helical Gearboxes

INNOTRANS SPH Series Gear Drives are exclusively developed for the Crystallisers, Strike Receivers & allied equipment in Sugar Plants and Sugar Refineries.

These Gear Drives have a unique configuration of a Helical gear pair and multi-stage Planetary gears, all housed in a single housing to form a compact low-speed & high-torque gear transmission. A multi-stage Planetary gear train is directly flanged onto the housing that accommedates helical gear pair. Electric Motor is flanged onto the input end of the multi-stage Planetary gear train.

Shaft mounted configuration of these Gear Drives eliminates bulky foundations, couplings, base frame, etc., normally required for general purpose Gear boxes. Through & through hollow output shaft of this Gear Drive slides over the driven shaft & gets axially locked to it by a gib head taper key.

A detachable manual handle facilitates easy manual rotation of the driven shaft by manually turning non-driving end shaft of the motor. Such manual operation is sometimes called for at the time of power changeovers and also during off-season maintenance work on the rotary elements of the driven equipment.

A Torque Arrester supplied along with the Gear Drive is required to be bolted onto the machine structure for taking reaction force of the Drive.

• High Efficiency transmission
• Simplified Installation - Direct mounting onto the driven shaft eliminating coupling, shrink disc, mounting base structure, etc.
• Use of Rolling Bearings results in extended service life.
• Common Oil Sump adequately lubricates all rotary elements, ease of oil filling & oil draining.
• Double-lip Oil Seals on output shaft eliminate ingress of water, fine dust, etc. Oil Seal on input shaft prevents oil contact with the Motor.
• Easy manual operation through a detachable handle at non-driving end of the Motor’s shaft.
• Higher Thermal Rating as compared to standard Planetary Gear Boxes — no de-rating on thermal capacity is needed upto 60 deg. C ambient temperature.

SPH Series Gear Drives are ideal replacement for the conventional Worm gear drive systems generally employed for Crystallisers and similar low-speed high-torque equipment in Sugar Plants & Sugar Refineries.

The conventional Worm gear drive system comprises of a foot mounted motor driving a single stage Worm gear box through a flexible coupling, both mounted onto a common bed plate. This single stage Worm gear box is further coupled to the open type Worm shaft which in turn drives open type Worm wheel mounted onto the driven shaft as shown below.

Conventional Worm gear drive system suffers from the following major disadvantages.

• High power consumption due to lower efficiency, the combined efficiency can be as low as 25%.
• Frequent replacement of worm gearings due to high sliding between shaft mounted worm wheel & structure mounted worm shaft.
• High lubrication consumption, frequent topping up of oil due to oil spillages.
• Frequent replacement of bearings due to Couplings' misalignment & contaminated lubricant.
• Higher cost of routine maintenance & house keeping.
• Cumbersome manual operation during power off conditions.
• Higher thrust loads on the driven shaft severely affecting life of support bearings gland packing.

• + Power saving of 50-70%
• Lubrication consumption down by 70-80%
• Longer maintenance free periods, over 80% reduction in routine maintenance costs.
• Clean surroundings
• Ease of manual operation during power-off conditions
• Longer life of the driven shafts’ support bearings & gland packing.