Mechanical electric liquid composite soft starting/stepless speed regulating transmission device for large power overloading equipment

Abstract

The invention relates to a mechanical-electrical-hydraulic compound soft-starting/stepless speed regulating drive mechanism on high-power heavy-duty equipment. The mechanism comprises a power input shaft sleeved on a planet carrier output shaft in a sliding manner. One end of the power input shaft is connected with a main electric motor, and the other end thereof is fixed in an inner hole of the planet carrier output shaft and is connected with a sun wheel shaft positioned in the inner hole of the planet carrier output shaft so as to form gear clearance float; at least two groups of planet wheels are fixed around the planet carrier output shaft through planet wheel shafts at one circle in a winding manner; each planet wheel is meshed with the sun wheel shaft peripherally, and is meshed with an inner ring gear positioned outside the planet carrier output shaft at the same time; a gear coupling which is connected with the inner ring gear along the gear direction to form radial gear clearance float is also included; a bevel gear fixed on the gear coupling is meshed with a conical tooth shaft connected with a low-power helper motor; and a bevel gear shaft for connecting the bevel gear and a hydraulic rotation function element are also arranged on the gear coupling at the same time. The mechanical-electrical-hydraulic compound soft-starting/stepless speed regulating drive mechanism integrates the functions such as soft-starting/stepless speed regulating, etc., and has the advantages of high transmission efficiency, small noise, compact structure, reliable performance and low cost.

Description

technical field [0001] The invention relates to an electromechanical-hydraulic composite soft start / stepless speed regulation transmission device for high-power heavy-duty equipment. Background technique [0002] When the motor starts under load, it will generate a starting current of 5 to 7 times the rated current intensity. For high-power motors, the large starting current will have a great impact on the motor and the power grid; The control method of reducing the speed to zero will also bring impact to the equipment and reduce the service life. Therefore, under many working conditions, the instantaneous shutdown of high-power mechanical equipment is not allowed, and a smooth and decelerated shutdown is required; during work, changes in working conditions also need to be considered The problem of stable stepless speed regulation of high-power mechanical equipment caused by it. To solve the above technical problems, it is necessary to adopt soft start / stepless speed regula...

AI Technical Summary

Problems solved by technology

Although the variable frequency speed control device has realized soft start, the price of the high-power variable frequency controller is extremely expensive, and the circuit and electronic components in it are difficult to repair, and the maintenance cost is high; the main problem of DC stepless speed regulation / soft start is: large The power DC motor is bulky and expensive, especially the investment in the substation is often large and the system is complex

[0005] Looking at the above-mentioned various soft-start speed control devices, none of them can realize two-way stepless speed regulation and smooth transition of the output speed while keeping the speed of the main motor constant; and can make the main motor of high-power mechanical equipment start The current is less than the rated current to achieve soft start; at the same time, it has functions such as output overload torque limiting protection and multi-drive power balance; and it can also achieve simple structure, reliable performance, and low manufacturing and maintenance costs.

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