CN106829762A - Crane rotating speed energy-storage booster high and lifting mechanism - Google Patents

Abstract

The invention relates to a high-speed energy storage and booster device for a hoisting mechanism of a crane, including an energy storage device, a clutch, a booster device and a control device; A higher-speed accumulator installation shaft is added to the gear; the clutch can realize the linkage or separation of the power input shaft of the reducer or gearbox and the energy accumulator shaft; the booster device can transfer the energy collected by the accumulator Transmission to the power input shaft of the reducer or gearbox. When the hoisting weight rises, the clutch is opened, and the accumulator does not collect energy, nor does it add new moment of inertia to the hoisting mechanism; when the hoisting weight is lowered, the clutch is closed, and the energy accumulator collects the potential energy released by the hoisting weight when it is lowered; the hoisting mechanism When the hoisting weight is driven to rise again, the booster device transmits the energy stored in the accumulator to the power input shaft. The invention is beneficial to high-efficiency energy storage, and can also assist in hoisting and hoisting.

Description

Crane high-speed energy storage booster device and hoisting mechanism

technical field

The invention relates to a high-speed energy storage and booster device for a crane hoisting mechanism, in particular to a hoisting mechanism with a high-speed energy storage and booster device and a crane using the lifting mechanism of the high-speed energy storage and booster device.

Background technique

Cranes and some lifting mechanisms are used to lift heavy objects and realize their lifting motion in vertical space, and realize the storage and release of gravitational potential energy during the lifting and lowering process. In order to ensure the energy-saving utilization of the crane, it is necessary to install a high-speed energy storage and booster device. The high-speed energy storage and booster device refers to converting the energy released by lowering the hoisting weight into electrical energy and storing it when the hoisting hook, platform or cage and other attachments are lowered. The stored energy is released to assist the starting of the electric motor.

The existing energy storage methods mainly include: chemical energy storage, superconducting energy storage and physical energy storage.

Chemical energy storage technology is relatively mature and has been widely used. Chemical energy storage is actually the use of chemical reactions that occur when energy storage materials are in contact, and stores energy through the conversion of thermal energy and chemical energy. At present, chemical energy storage is widely used in chemical heat pumps, chemical heat engines, chemical heat pipes, air conditioning equipment, and fire extinguishing materials. However, its service life is short, and it is significantly affected by external conditions, and the most important thing is that it seriously pollutes the environment.

Superconducting energy storage is a device for storing electrical energy made of the zero resistance of superconductors. It can not only store electrical energy without loss in the superconductor inductor coil, but also quickly exchange active and reactive power with external systems through power electronic converters. The power is used to improve the stability of the power system and improve the quality of power supply. It can be seen that it has high requirements on technology and strict requirements on the environment, and it is not suitable for large-scale applications for the time being.

Physical energy storage mainly includes compressed air energy storage, pumped water energy storage and flywheel energy storage. Compared with chemical energy storage, physical energy storage is more environmentally friendly and green, and it is realized by using natural resources. Physical energy storage has the advantages of large scale, long cycle time, and low operating costs, but requires special geographical conditions and sites, construction limitations are relatively large, and one-time investment costs are high, so it is not suitable for off-grid power generation with small power system.

At present, with the rapid development of China's economy, energy and environmental protection issues have become the main obstacles to China's rapid development. Therefore, while developing new energy sources, it is also very important to study how to recover and store wasted energy. Especially when the hoisting mechanism lifts heavy objects, it will consume a lot of energy, which requires the concept of energy saving to be taken into account in the design of the crane. Energy recovery and storage, while realizing the design concept of energy saving and environmental protection.

The problem faced by non-electric cranes currently operating in the field is that they consume a lot of energy, and the energy consumed is not recycled reasonably. The high-speed energy storage and booster device stores the energy released by lowering the hoisting weight, which can improve the utilization rate of energy.

To sum up, the existing hoisting mechanism of the crane not only consumes a lot of energy, but also does not consider the recovery and utilization of energy.

Contents of the invention

The object of the present invention is to provide a high-speed energy storage and booster device for the hoisting mechanism of a crane. By increasing the speed of the gear, the stored energy is further increased to solve the problem of efficient energy recovery of the crane. Simultaneously, the object of the present invention is also to provide a hoisting mechanism utilizing the high-speed energy storage and booster device.

In order to achieve the above purpose, the system scheme of the high-speed energy storage and booster device of the present invention is as follows.

A high-speed energy storage and booster device, including an accumulator (4), a clutch (5), a booster device (3) and a control device; wherein the power input of the reducer (1) or gearbox of the crane hoisting mechanism Shaft (11), a shaft with a higher speed is added through the speed-up gear, and the accumulator (4) is installed on the shaft; the clutch (5) can realize the power input of the reducer (1) or the gearbox The linkage or separation of the shaft (11) and the rotating shaft (12) of the accumulator; the booster device (3) can transfer the energy collected by the accumulator (4) to the power input shaft of the reducer (1) or gearbox (11) on.

The present invention also provides a hoisting mechanism using the above-mentioned high-speed energy storage and booster device, including a drum coupling, a drum, a fixed pulley block, a guide pulley block, a movable pulley hook block, a wire rope, a lifting weight and a lifting height Stoppers, etc., the steel wire rope on the drum directly or bypasses the guide pulley to pull the wire rope pulley block to realize the lifting movement of the pick-up device and the hoisting weight. When the motor rotates forward or reverse, the drum (6) winds or releases the wire rope, and the hook The lifting or lowering movement is realized by the fetching device and the suspended item; the high-speed energy storage and booster device includes an accumulator (4), a clutch (5), a booster device (3) and a control device; The speed reducer (1) of the lifting mechanism or the power input shaft (11) of the gearbox, a shaft with a higher speed is added through the speed increasing gear, and the accumulator (4) is installed on the shaft; the clutch (5 ) can realize the linkage or separation between the power input shaft (11) of the speed reducer (1) or the gearbox and the energy accumulator shaft (12); Transmit on the power input shaft (11) of speed reducer (1) or gearbox.

The effect achieved by the present invention is: the high-speed energy storage and booster device can finally store the potential energy of the crane in the form of electric energy when the crane is hoisting down, and use it as an auxiliary driving energy in the stage of re-lifting the heavy object. The lifting mechanism adds a new moment of inertia, which is conducive to efficient energy storage and can also assist the lifting of the hoist.

Specifically, when the hoisting weight of the crane rises, the clutch (5) is opened through the control device, and the energy accumulator (4) does not collect energy and does not add new moment of inertia to the hoisting mechanism; when the hoisting weight of the crane is lowered, the accumulator (4) The energy device (4) is in the charging mode. At this time, the clutch (5) is closed by the control device, and the energy accumulator (4) collects the potential energy released by the hoisting weight when it descends; when the lifting mechanism drives the hoisting weight to rise again, the energy accumulator (4) ) is in the discharging mode, at this time, the booster device (3) transmits the energy stored in the accumulator (4) to the power input shaft (11).

In order to illustrate the advantages of the high-speed energy storage and booster device of the present invention through the increase of the gear speed, thereby increasing the energy stored in the gear, the following calculation and analysis are performed.

The energy stored in the form of kinetic energy by a gear rotating at high speed can be expressed as .

E =1/2 mv ² =1/2 mr ² ω ² =1/2 Jω ² ,

In the formula: v —the linear velocity of the gear edge (m/s), m —the mass of the gear (kg), J —the moment of inertia of the gear (kg·m ² ), ω —the angular velocity of the gear (rad/s).

From the above formula, it can be seen that the energy of the gear is proportional to the moment of inertia of the gear and the square of the angular velocity of the gear. From this, it can be seen that the methods to increase the energy storage of the gear include increasing the moment of inertia of the gear and increasing the speed of the gear.

Since the formula of gear moment of inertia can be approximated as: J =1/2 mr ² ,

In the formula, r —the turning radius of the gear (m).

From the above formula, it can be known that the methods of increasing the moment of inertia of the gear include increasing the radius of rotation of the gear and increasing the mass of the gear. However, in the general design situation, the mass and volume of the gear should be reduced as much as possible under the condition of ensuring a certain energy capacity, so the method of increasing the energy storage of the gear Generally to increase the gear speed.

It can be seen that by increasing the gear speed, the energy stored in the gear can be increased.

Description of drawings

Fig. 1 is a schematic diagram of a high-speed energy storage and booster device, wherein (1) is a reducer, (2) is a brake, (3) is a booster device, (11) is a power input shaft of a reducer or a gearbox, (12 ) is the energy accumulator installation shaft of the high speed reducer, (13) is the high speed shaft gear of the reducer, (14) is the high speed gear after the reducer expands, (4) is the energy accumulator, and (5) is the clutch.

Fig. 2 is a schematic diagram of the lifting mechanism, (1) is a reducer, (2) is a brake, (3) is a booster, (4) is an accumulator, (5) is a clutch, and (6) is a reel.

Fig. 3 is a working flow diagram of the high-speed energy storage and booster device.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a high-speed energy storage and booster device includes an accumulator (4), a clutch (5), a booster device (3) and a control device; wherein the speed reducer (1) of the crane hoisting mechanism Or the power input shaft (11) of the gearbox, add a higher speed shaft (12) through the speed-increasing gear, and the accumulator (4) is installed on this shaft; the clutch (5) can realize the reduction gear (1 ) or the linkage or separation of the power input shaft (11) of the gearbox and the accumulator shaft (12); the booster device (3) can transfer the energy collected by the accumulator (4) to the reducer (1) or the gear on the power input shaft (11) of the box. When the crane is hoisting up, the clutch (5) is opened through the control device, and the accumulator (4) does not collect energy, and at the same time does not add a new moment of inertia to the hoisting mechanism, and does not increase the burden on the mechanism; when the crane is hoisting When descending, the motor reverses to make the reel (6) release the steel wire rope wound on it, the hook and the hanging objects realize a certain speed of descending movement, and the high-speed gear (14) after the speed reducer (1) is expanded rotates at a high speed. The accumulator (4) is in the charging mode. At this time, the clutch (5) is closed by the control device, and the accumulator (4) collects the potential energy released by the lowering of the lifting weight; when the lifting mechanism drives the lifting weight to rise again, the motor rotates forward , so that the reel (6) rolls in the steel wire rope wound on it, the hook and the hanging objects realize a certain speed of upward movement, the energy storage device (4) is in the discharge mode, at this time the booster device (3) will store energy The energy stored in the device (4) is transmitted to the power input shaft (11), and the stored energy is used as auxiliary driving energy, which is more economical, energy-saving and environmentally friendly.

Example of a lifting mechanism.

The hoisting mechanism includes not only the high-speed energy storage and booster, but also the driving device and the reel mechanism. Among them, in the reducer (1) of the hoisting mechanism of the crane or the power input shaft (11) of the gearbox, a higher-speed shaft is added through the speed-increasing gear, and the energy accumulator (4) is installed on the shaft; The clutch (5) can realize the linkage or separation of the power input shaft (11) of the speed reducer (1) or the gearbox and the accumulator rotating shaft (12); 4) The collected energy is transferred to the power input shaft (11) of the speed reducer (1) or gearbox.

The high-speed energy storage and booster device is the same as above, and will not be repeated here.

A specific embodiment of the invention involving two subjects has been given above, but the invention is not limited to the described embodiment. Under the idea given by the present invention, the technical means in the above-mentioned embodiments are transformed, replaced, and modified in ways that are easy for those skilled in the art, and the functions played are basically the same as those of the corresponding technical means in the present invention. , and the purpose of the invention realized is basically the same, and the technical solution formed in this way is formed by fine-tuning the above examples, and this technical solution still falls within the protection scope of the present invention.

Claims (10)

1. A high-speed energy storage and booster device, comprising an accumulator, a clutch, a booster device and a control device; it is characterized in that the power input shaft of the speed reducer or gearbox of the crane hoisting mechanism is newly added through the speed-increasing gear A shaft with a higher rotational speed, on which the accumulator is installed; the clutch can realize the linkage or separation of the power input shaft of the reducer or gearbox and the rotating shaft of the accumulator; the booster device can transfer the energy storage The energy collected by the reducer is transmitted to the power input shaft of the reducer or gearbox. 2. A high-speed energy storage and booster device for a crane hoisting mechanism according to claim 1, wherein the energy storage device is installed on the drive shaft of the reducer or gearbox and a new one is added through the speed-increasing gear. on high-speed shafts. 3. A high-speed energy storage and boosting device for a crane hoisting mechanism according to claim 1, characterized in that the clutch can realize the linkage or separation of the power input shaft of the reducer or gearbox and the rotating shaft of the energy storage device . 4. A high-speed energy storage and booster device for a crane hoisting mechanism according to claim 1, characterized in that the booster device can transfer the energy collected by the accumulator to the power input shaft of the reducer or gearbox . 5. A hoisting mechanism, which not only includes the high-speed energy storage and booster device mentioned in the above right 1, but also includes a drum coupling, a drum, a fixed pulley block, a guide pulley block, a movable pulley hook block, a steel wire rope, and a lifting weight And the lifting height limiter, etc., the steel wire rope on the drum directly or bypasses the guide pulley to pull the wire rope pulley block to realize the lifting movement of the pick-up device and the hoisting weight. When the motor rotates forward or reverse, the drum winds or releases the wire rope, the hook The lifting or lowering movement of the fetching device and the hanging items is realized; it is characterized in that in the power input shaft of the reducer or gearbox of the hoisting mechanism of the crane, a higher-speed shaft is added through the speed-up gear, and the accumulator Installed on the shaft; the clutch can realize the linkage or separation of the power input shaft of the reducer or gearbox and the rotating shaft of the accumulator; the booster device can transfer the energy collected by the accumulator to the reducer or gearbox on the power input shaft. 6. The hoisting mechanism according to claim 5, wherein the energy accumulator is installed on the drive shaft of the reducer or the gearbox, and a shaft with a higher rotational speed is newly added through the speed-increasing gear. 7. The lifting mechanism according to claim 5, characterized in that the clutch can realize the linkage or separation of the power input shaft of the speed reducer or gearbox and the rotating shaft of the accumulator. 8. The hoisting mechanism according to claim 5, wherein the booster device can transmit the energy collected by the accumulator to the power input shaft of the speed reducer or gearbox. 9. A crane, comprising the lifting mechanism mentioned in claim 5 above. 10. Crane according to claim 9, characterized in that its hoisting mechanism satisfies the features mentioned in claims 6, 7 and 8.