Delay starting torque-limiting hydraulic coupler

Abstract

The invention relates to a delay starting device, belongs to the field of coal mine machinery, and particularly relates to a delay starting torque-limiting hydraulic coupler. A pump wheel of the torque-limiting hydraulic coupler adopts an inner edge chamfering angle or an interval chamfering angle; turbine blades are arranged at intervals up and down; a front auxiliary cavity, a rear auxiliary cavity and a side auxiliary cavity are arranged; the torque-limiting characteristic of the coupler is improved; when a working machine is started or overloaded, dynamic pressure and static pressure are utilized to enable working liquid to drain and shunt to the auxiliary cavities, so that the liquid filling amount in a working cavity is reduced, and the transmission torque and the overload coefficient are reduced; and meanwhile, a throttling control valve is arranged to enable liquid in the auxiliary cavities to slowly enter the working cavity, so that the starting time is prolonged, the soft starting performance and the overload protection performance of the device are effectively improved, and stable operation of equipment is guaranteed reliably.

Description

technical field [0001] The invention relates to a soft start device, which belongs to the field of coal mine machinery, in particular to a time-delay start torque-limiting hydraulic coupler. Background technique [0002] In the harsh working environment underground, the coal mining volume is large, the start-up is frequent and mostly on-load, which has a large impact on the scraper chain, and the load is unstable. overload. In order to solve the problems of frequent starting and overload starting damage to equipment, a safe and reliable soft starting device can effectively improve the transmission quality and provide effective mechanical protection for the coal mine mechanical transmission system. [0003] At present, torque-limiting hydraulic couplings are widely used as soft start devices for scraper conveyors, reloaders, and crushers in coal mines. Moment-limiting hydraulic couplings often improve their torque-limiting characteristics by setting front auxiliary chambers...

AI Technical Summary

Problems solved by technology

Moment-limiting hydraulic couplings often improve their torque-limiting characteristics by setting front auxiliary chambers and rear auxiliary chambers. An overflow hole is set between the auxiliary chamber and the working chamber to adjust the liquid filling volume in the working chamber and the auxiliary chamber. However, this method cannot better control the extension speed between the working chamber and the auxiliary chamber, and cannot fully exert the shunt and extension functions of the auxiliary chamber.

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