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Special gearboxes ![]()
Gearboxes can be put into operation in the following conditions:
permanent and alternating load of one direction in the limits of nominal torque;
long-term operation (up to 24 hours per day) or with periodical stops;
shaft rotation in any direction without preference, except gearboxes of KTst type;
input shaft rotational speed - n=750-1500 rpm;
different climatic constructions.
Nominal torques of gearboxes are given in table for constant mode of operation (duration of switching on the PV - 100%). While gearboxes operate in reverse mode, i.e. the periodical change of rotation direction, except gearboxes of KTst type, the nominal torque at the output shaft decreases to 25%. The oil-bath circulating and stream non-circulating flow lubrication system shall be provided for gearboxes.
The gearboxes can have different constructions, providing:
cylindrical and conical ends of input and output shafts;
low-speed shaft in the form of tooth-type coupling;
hollow shaft with keyed joint;
different variants of gearbox fastening. |
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| Type of gearboxes | No. of standard sizes, pcs. | Power range in low-speed shaft, N, KW | Range of gear ratios, U | Weight, kg | | One-step cylindrical type | 9 | 7-1600 | 2,5-8,0 | 17-8300 | | Two-step cylindrical type | 13 | 70-3760 | 7,5-70 | 2200-34600 | | Three-step cylindrical type | 4 | 9-1500 | 40-240 | 1600-31000 | | Two-step and three-step conical-cylindrical type | 17 | 6,2-800 | 7,1-50 | 1250-53000 | | One-step and two-step worm type | 7 | 0,1-8,0 | 31,5-1435 | 250-7300 |
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