It is difficult to adjust the alignment of the two shafts of large machinery and equipment. The coupling with durable and easy replacement should be selected. The service life of the universal coupling with metal elastic elements is generally longer than that of the universal coupling with non-metallic elastic elements. The allowable speed range of universal coupling is based on the outer edge size of the allowable linear speed of different materials. The allowable speed range of couplings of different materials, varieties and specifications is different. Changing the material of the coupling can increase the allowable speed range of the coupling. The allowable speed of steel is greater than that of cast iron, which is within the allowable installation space of the machinery and equipment.
Universal couplings have excellent performance such as constant speed, self rotation, vibration and impact, large swing angle, etc., and are mainly used for steering axle couplings of medium and heavy trucks. The main features of universal joint include input shaft, inner sleeve, cage, steel ball, outer sleeve, output shaft and sealing cover. The outer sleeve and output shaft are integral structures; The open end of the outer sleeve is provided with a 40 degree chamfer, and the input shaft and the inner sleeve are connected with a shaft retainer ring. Universal coupling is mainly used to solve the existing off-road all-wheel drive structure of trucks and special military vehicles, while the double cross shaft coupling cannot adapt to the road conditions of irregular road driving.
It can not meet people’s requirements for the driving performance and comfort of trucks and special military vehicles. The common rail oil pump of diesel engine uses a coupling transmission device, which includes a coupling body. One side of the universal coupling body is fixedly connected with a metal elastic plate through a connecting device. The metal elastic plate is equipped with a connecting hole corresponding to the power output flange that provides power for the common rail oil pump; The other side of the coupling body is fixedly connected with a metal elastic sheet through a connecting device. The metal elastic sheet is equipped with a connecting hole corresponding to the power input flange of the common rail oil pump of the diesel engine. The metal elastic sheet plays the role of transmitting power.
Two metal elastic sheets will deform in the axial direction. The structure of the protective device is divided along the axial direction. The protective device is connected to the corresponding equipment in the unit at the flanges at both ends. One end of the protective device shall be equipped with an expansion joint and an O-ring shall be installed at the expansion joint. If the coupling needs to be protected when working under corrosive conditions, the protective device must be equipped with a pipe joint so that dry air or inert gas can be connected to the protective device for continuous lubrication of the controller. Each oil nozzle shall be tightened to the protective device in the proper direction to make the oil spray in the direction of rotation. If the unit operates in the positive and negative directions, the oil will be injected in the axial direction. The oil nozzle or oil pipe shall not collide with the coupling.