Clutch metal strap type soft starting device

Abstract

The invention discloses a clutch metal strap type soft starting device, belonging to a starting device. The starting device comprises a power input shaft, wherein, the power input shaft is provided with a drive gear; the end part of the power input shaft is connected with a drive shaft of a set of metal strap component through a clutch; the end part of a driven shaft of the metal strap component is connected with a wheel shaft of a driven gear; the driven gear is meshed with the drive gear. The clutch metal strap type soft starting device not only can realize no-load starting for a motor, butalso can provide a smooth and shock-free starting torque to realize stepless speed changing; meanwhile, the clutch metal strap type soft starting device also can realize adjustment of power balance.

Description

technical field [0001] The invention relates to a soft starter. Background technique [0002] Soft starters are widely used in large inertia, high torque mechanical equipment. At present, the commonly used soft starters mainly have the following forms: [0003] 1. Adjustable speed hydraulic coupling. This is a hydraulic transmission device that mainly relies on the change of liquid kinetic energy to transmit energy. Although the device has soft start performance, there is a large slip between the pump wheel and the turbine when starting, and there is also a 3-5% slip during normal operation, so it inevitably brings the following disadvantages: 1. The heat is high and the efficiency is low, so a cooler must be added; ②The transmission ratio is always less than 1; ③There is always an unstable transition zone in the starting process, which has an impact on the mechanical system; ④The controllability, stability and control accuracy are relatively Poor; ⑤The equipment is lar...

AI Technical Summary

Problems solved by technology

Although the device has soft start performance, there is a large slip between the pump wheel and the turbine when starting, and there is also a 3-5% slip during normal operation, so it inevitably brings the following disadvantages: 1. The heat is high and the efficiency is low, so a cooler must be added; ②The transmission ratio is always less than 1; ③There is always an unstable transition zone in the starting process, which has an impact on the mechanical system; ④The controllability, stability and control accuracy are relatively Poor; ⑤ The equipment is large in size and has many supporting accessories; ⑥ The versatility of parts is poor

With the development of power electronics technology, AC motor frequency conversion speed control will occupy a dominant position in the field of motor speed control, and will become an important development direction of modern electric drives, but there are still the following problems: ①High-power high-voltage frequency conversion system The reliability is not high; ②It will cause electrical pollution to the power grid; ③The initial investment is large; ④The requirements for on-site maintenance personnel are high; ⑤Emergency treatment after failure is difficult

But its disadvantages are: ①The viscosity and cleanliness of the oil are extremely high; ②It is difficult to manufacture; ③It is difficult to maintain and repair, special tools are needed, and the cost is high; ④The initial investment of equipment is large, and it is not suitable for large and medium-sized belt conveyors in China. Widely used

It has the characteristics of compact structure, small size and good soft start performance, but it also has the following disadvantages: ① It requires high oil viscosity and cleanliness; ② It will generate a lot of heat when adjusting the belt speed and power balance; ③ High technical requirements for maintenance personnel

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