Transmission system of stepping mechanism and energy recovery system thereof

Abstract

The invention discloses an energy recovery system, further discloses a transmission system of a stepping mechanism, and the transmission system of the stepping mechanism comprises the energy recoverysystem. The energy recovery system comprises a hydraulic power unit, a frequency conversion driving unit and an energy recovery device, wherein the hydraulic power unit comprises a speed regulating motor and a hydraulic pump; the speed regulating motor is connected with the hydraulic pump; the frequency conversion driving unit is connected with the speed regulation motor; the energy recovery device is connected with the frequency conversion driving unit; and the frequency conversion driving unit controls the speed regulating motor to drive the hydraulic pump to operate, the volume speed regulating control is carried out on a hydraulic actuating element, and the hydraulic actuating element is driven to act, so that the load weight under different working conditions is automatically matched,the throttling loss is avoided, the energy-saving effect is achieved, and the control and the structure are simple. When the hydraulic actuating element descends or brakes, the hydraulic actuating element drives the speed regulating motor to be in a power generation state, potential energy and/or kinetic energy of the hydraulic actuating element is converted into electric energy, and the electricenergy is transmitted to the energy recovery device through the frequency conversion driving unit for reuse.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to a transmission system of a stepping mechanism and an energy recovery system thereof. Background technique [0002] Walking mechanisms are widely used in the field of metallurgy, such as walking heating furnaces, walking transport beams, and walking cooling beds. Taking the walking heating furnace as an example, the walking mechanism consists of a transmission system consisting of a lifting hydraulic cylinder and a translational hydraulic cylinder, which is mainly used to lift and translate the steel billet in the heating furnace, so that the steel billet can be heated evenly in the heating furnace. During the working process of the lifting hydraulic cylinder of the walking furnace bottom machine, it is necessary to repeatedly lift and lower the weight of hundreds of tons or even thousands of tons. The lifted object has a large gravitational potential energy during...

AI Technical Summary

Problems solved by technology

[0005] 1. It is necessary to increase the equipment with a stepping mechanism, and its structure is relatively complex, which requires civil engineering and mechanical mechanisms, which is not conducive to the transformation of existing equipment;

[0006] 2. In order to match the load weight under different working conditions, its control and debugging are very troublesome;

[0007] 3. The control principle of valve-controlled throttling and speed regulation is adopted, which cannot eliminate a large number of hydraulic throttling losses;

[0008] 4. Based on the power source of the constant pressure variable pump, there are relatively large no-load and low-load conditions, and there must be energy waste;

[0009] 5. The hydraulic accumulator group recovers energy for reuse, the required accumulator group takes up a lot of space, and the use and maintenance of the accumulator is difficult

[0010] So far, there is no technical solution for recovering and reusing the kinetic energy of the stepping mechanism translation on the market

[0011] In addition, the patent CN108383039A discloses an energy-saving hydraulic control system for the stepping lifting mechanism. The energy recovery and reuse of the accumulator group and the control scheme of the servo motor + closed variable pump can have a good energy-saving effect, but due to the load The change of accumulator makes it difficult to match the pressure of the accumulator. When there is a process of switching between high and low pressure, it makes it difficult to control the stability of the motion. Secondly, the maintenance difficulty and limited service life of the accumulator are also problems in the use process. The use of the energy bank also requires installation space

In addition, the patent is a fully closed transmission system, and the temperature and cleanliness control of the oil will be more difficult to control

Moreover, this patent only controls the lifting hydraulic cylinder of the mechanism, and does not solve the problem of translation transmission in the same motion link.

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