Reducer gearboxesare the most vulgar type used in manufacture , transit and appliance . This is due to the vast majority of gear case software requiring reduction of a motor ’s shaft speed while increase its torque . There are specialized coating that postulate just the opposite , however – an increase in shaft pep pill with a proportionally lower torque . While most increaser gearboxes are particularly designed to be increasers , there are a few reducer gearboxes that may be turned around to increase f number under very circumscribed conditions .
Matching Inputs and Outputs
Using a reducer gearbox as an increaser is a matter of turn a viable reducing agent around 180 - degrees and putting a rotational comment into the reducer ’s output , to receive a high amphetamine yield on the reductant ’s input pecker . Success in doing this starts with selecting the right kind and size of reducing agent gearbox for the specific increaser lotion . The magic trick is in picking a reducer where its input and output specification can be closely matched to the increaser ’s output and input signal specifications , respectively .
Picking a Type
choose an increaser eccentric and proportion that is usable for your increaser app . These are urging and helical single stage , bevel square and world types where the increasing ratio will be a utmost of about 1:4 . Therefore , a potential single - stage reductant , in which a single small input paraphernalia drives a single large output cogwheel , would have a maximum reducing ratio of about 4:1 .
Calculating Torque
habituate the oecumenical formulas for torsion , revolution - per - minute ( revolutions per minute ) and horsepower for electric motor applications to make up one’s mind the size , proportion and hardiness of the reduction gear case you will use as an increaser . These are : HP = rpm x torsion / 5252 and torque = HP x 5252 / rpm . Reducer proportion = input revolutions per minute / output rpm .
Existing Reducer Example
You already have a reductant with a 3:1 proportion that is designed to be used with 2 - horsepower motors turning at a upper limit of 3450 - rpm with 3 foot - pounding of torque applied to the input . This succumb 9 foot - pounds torque and 1150 - rpm on the turnout . Using this reducer as an increaser would limit you to applications with inputs that turn at 1150 - rpm and 9 ft - pounds of torsion and outputs that turn at 3450 - rpm and 3 foot - pound of torsion . ( Horsepower stay on a constant , since rpm and torsion are inversely proportional in a gearbox ) .
New Application Example
If you need to obtain a rotational output speed of 6000 - rpm and outturn torsion of 10 foot - Syrian pound , with a 1500 - rpm motor , you would require a 4:1 reducer gearbox to put up a 1:4 increaser ratio that can address an 11 - 1/2 HP motor with at least 40 foot - pound of torque .
Practical Application
If you want to turn a high - speed folio blower impeller usually designed for 9000 - rpm motors with a 6 - horsepower lawn mower railway locomotive turning at 3000 - rpm , you will call for a 3:1 ratio increaser with at least a 6 - horsepower rating or a torque rating of at least 10.5 substructure - pounds . You will need to securely go up the gearbox on a frame with the engine shaft coupled directly to the output shaft of the 3:1 reducer . The impeller will have to be mounted on the gearbox ’s input signal lance , with the impeller housing securely attached to the input shaft bearing build . This will allow the engine ’s horsepower to be constant as it is step up in speed to drive the impeller at a proportionately lower torque ; the result will be an highly sinewy electric fan .
References
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