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US 4,635,769 AGranted
Gear protection system for grinding mills
AssigneeCanadian General Electric Company Limited
InventorPeter de Hertel Eastcott
Life of this patent
Estimating the term…
Abstract
A clutch is interposed between the driving gears of a grinding mill and the driving motor to protect the gears from damage by mechanical overloading. The clutch is set to slip at torques below those required to structurally damage the gears yet higher than design load and the clutch released and the mill is shut down after a preset degree of clutch slippage occurs.
Claims16
A drive gear overload protector for heavily loaded gears, said gears having a design yield strength at which said gears will fail comprising:
- a clutch means having a drive side and a driven side interposed between said gears and a driving motor;
- means for setting the maximum torque that may be transmitted between said drive and said driven sides of said clutch to a value so that said clutch slips before gears are subjected to a maximum stress less than said gear yield strength;
- means for detecting relative movement between said drive and said driven sides of said clutch;
- means for releasing said clutch and
- said means for detecting operating said means for releasing said clutch when the amount of said relative movement detected by said means for detecting exceed a preset value thereby to prevent undue slippage of said clutch.
2 more elements
Dependencies are inferred from the claim text.