Gravity energy storage winding device suitable for matrix type extra-large-load multiple heavy objects

Abstract

The invention relates to the technical field of gravity energy storage, in particular to a gravity energy storage winding device suitable for matrix type heavy objects with extra-large loads. The device comprises a permanent magnet synchronous motor, a parallel shaft speed reducer, planetary speed reducers, a fixed pulley block, a steel wire rope and four winding drums, the whole winding device is installed on an energy storage tower, the movable pulley block is arranged on a gravity block, the planetary speed reducer is arranged in each winding drum, and the permanent magnet synchronous motor drives the parallel shaft speed reducer through a coupler. Four output shafts of the parallel shaft speed reducer are correspondingly connected with the planetary speed reducers, and a steel wire rope winds around the movable pulley block and the fixed pulley block to be wound around the winding drum. A matrix layout that one motor drives four winding drums is adopted, so that the number and energy consumption of motors are reduced; the combined transmission structure adapts to kiloton loads, energy consumption of horizontal and rotary motion in an existing gravity energy storage form is avoided, the energy conversion efficiency is improved, and the combined transmission structure is suitable for a tower type gravity energy storage system.

Description

Technical Field

[0001] This invention relates to the field of gravity energy storage technology, and in particular to a gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects. Background Technology

[0002] In recent years, the goal of "carbon neutrality" has driven higher requirements for the scale of energy storage configurations for wind and solar grid-connected power generation. Gravity energy storage, as an advantageous energy storage type needed by the power system, offers advantages over pumped storage technology. It has relatively lower costs, more flexible site selection, is highly scalable, and boasts high conversion efficiency, while also being relatively green and safe. It addresses the challenges of the randomness, fluctuations, and unsustainability of power generation from renewable energy sources such as wind and solar power due to changes in natural conditions, while simultaneously improving the grid's peak-shaving and frequency regulation capabilities and overall stability.

[0003] In existing gravity energy storage tower systems, tens of thousands of small-load gravity blocks are stacked around the energy storage tower. These gravity blocks require horizontal and rotational movement to be transported to their designated locations to convert gravitational potential energy into electrical energy and feed it back to the grid. This horizontal and rotational movement inevitably leads to energy consumption and reduces energy conversion efficiency. Furthermore, the path planning of the gravity blocks relies on high-precision artificial intelligence algorithms to ensure their rapid and accurate movement to the designated location. Using ultra-large-load gravity blocks as the energy storage medium eliminates the need for stacking and the horizontal and rotational movement of the blocks, resulting in a simple and reliable movement path and effectively avoiding the aforementioned problems. However, ultra-large-load gravity blocks typically weigh in the thousands of tons. Compared to small-load gravity blocks, the design of the transmission chain and the load matching of components in the hoisting device for ultra-large-load gravity blocks are more demanding. Simultaneously, reducing energy loss during vertical lifting and lowering and minimizing the number of control system units are crucial. Summary of the Invention

[0004] In view of this, the present invention provides a gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects.

[0005] Therefore, the present invention provides the following technical solution:

[0006] A gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects includes a permanent magnet synchronous motor, a parallel shaft reducer, a planetary reducer, a fixed pulley block, a wire rope, and a drum; The permanent magnet synchronous motor and the parallel shaft reducer are both mounted on the energy storage tower frame; there are four drums in total; each drum has a planetary reducer installed inside, and the output end of the planetary reducer is fixedly connected to the inner wall of the drum to drive the drum to rotate; the output end of the permanent magnet synchronous motor is connected to the input shaft of the parallel shaft reducer through a second coupling; the parallel shaft reducer has a four-output structure, and its four output shafts are respectively connected to the input ends of the planetary reducers in the four drums through a first coupling; The fixed pulley block is fixedly installed on the energy storage tower frame, and the gravity block is equipped with a movable pulley block. After being guided by the movable pulley block and the fixed pulley block, the wire rope is wound on the drum.

[0007] Furthermore, the parallel shaft reducer has a dual-input, four-output structure, including an input shaft, a reduction gearbox, an output shaft, and a transmission shaft. The input shaft and two output shafts are all mounted through the reduction gearbox. One end of the input shaft is connected to the output end of the permanent magnet synchronous motor, and the two ends of the output shaft are respectively connected to the input ends of the corresponding planetary reducers. The input shaft is located between the two output shafts, inside the reduction gearbox, and the transmission shaft is rotatably mounted between the input shaft and the output shaft. The input shaft, output shaft, and transmission shaft are parallel to each other. An input gear is mounted on the input shaft, a transmission gear is mounted on the transmission shaft, and an output gear is mounted on the output shaft. The input gear, transmission gear, and output gear mesh sequentially.

[0008] Furthermore, the planetary reducer includes a sun gear input shaft, a first-stage internal gear ring, a second-stage internal gear ring, a first-stage planet carrier, a second-stage planet carrier, a first-stage planet gear, and a second-stage planet gear; One end of the drum is coaxially provided with a mounting hole, and one end of the sun gear input shaft is rotatably mounted in the mounting hole through a bearing, and the sun gear input shaft is coaxially arranged with the drum; the other end of the sun gear input shaft extends out of the drum and is connected to the output end of the parallel shaft reducer through a first coupling; Both the primary and secondary internal gear rings are fixedly installed in the mounting hole and are arranged coaxially with the sun gear input shaft. The diameter of the primary internal gear ring is smaller than that of the secondary internal gear ring. A first-stage sun gear and a second-stage sun gear are installed on the sun gear input shaft at positions corresponding to the first-stage internal gear ring and the second-stage internal gear ring, respectively. The secondary planetary carrier is fixed to the energy storage tower frame by a bracket, and the primary planetary carrier is rotatably installed in the mounting hole by a fixed rotating shaft. The primary planetary carrier is equipped with a primary planetary gear, and the secondary planetary carrier is equipped with a secondary planetary gear. The first-stage planetary gear meshes simultaneously with the first-stage sun gear and the first-stage internal gear ring on the sun gear input shaft; the second-stage planetary gear meshes simultaneously with the second-stage sun gear and the second-stage internal gear ring on the sun gear input shaft.

[0009] Furthermore, it also includes a drum bearing housing and a safety brake. The drum bearing housing is fixedly installed on the frame of the gravity energy storage tower. The end of the drum away from the parallel shaft reducer is rotatably installed on the drum bearing housing through a bearing, so that the drum can rotate around its own axis. The safety brake is fixedly installed on the energy storage tower frame, and its braking end cooperates with the drum.

[0010] Furthermore, it also includes an emergency motor, which is installed on the energy storage tower frame, and the output end of the emergency motor is connected to the other end of the input shaft.

[0011] Furthermore, it also includes a working brake and an emergency brake, both of which are fixedly installed on the energy storage tower frame. The braking end of the working brake is connected to a permanent magnet synchronous motor, and the emergency brake is connected to an emergency motor.

[0012] Furthermore, each set of the hoisting devices is a basic module, and each basic module array is installed on the energy storage tower frame.

[0013] Advantages and positive effects of the present invention: It adopts a matrix layout of one motor driving four drums, which reduces the number of motors and energy consumption; it eliminates the energy consumption of horizontal and rotational motion in existing gravity energy storage forms, improves energy conversion efficiency, and is suitable for tower gravity energy storage systems.

[0014] Employing a combined transmission structure of parallel shaft reducers and planetary reducers, the two-stage planetary transmission features high rigidity, high load capacity, and strong speed reduction and torque amplification capabilities, making it suitable for ultra-large load requirements and adaptable to the vertical lifting and lowering of gravity blocks weighing thousands of tons. This device boasts a high degree of versatility; by using it as a base module for array arrangement, it can meet the diverse design parameters required for gravity energy storage tower power plants. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This invention provides a structural schematic diagram of a gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects.

[0017] Figure 2 This invention provides a schematic diagram of the internal structure of the drum of a gravity energy storage winch device suitable for matrix-type heavy loads and multiple objects.

[0018] Figure 3This invention provides a schematic diagram of the internal structure of a parallel shaft reducer for a matrix-type gravity energy storage winch device suitable for large loads and multiple objects.

[0019] Figure 4 The present invention provides a matrix-arranged energy storage tower suitable for a matrix-type gravity energy storage winch device with large loads and multiple objects.

[0020] In the diagram: 1. Safety brake; 2. Drum; 3. Planetary reducer; 3.1. Sun gear input shaft; 3.2. First-stage planetary carrier; 3.3. Second-stage planetary carrier; 3.4. First-stage internal gear ring; 3.5. Second-stage internal gear ring; 3.6. First-stage planetary gear; 3.7. Second-stage planetary gear; 3.8. First-stage sun gear; 3.9. Second-stage sun gear; 4. First coupling; 5. Parallel shaft reducer; 5.1. Input shaft; 5.2. Output shaft; 5.3. Gearbox housing; 5.4. Transmission shaft; 5.5. Input gear; 5.6. Transmission gear; 5.7. Output gear; 6. Working brake; 7. Permanent magnet synchronous motor; 8. Wire rope; 9. Fixed pulley block; 10. Emergency motor; 11. Emergency brake; 12. Drum bearing housing; 13. Second coupling; 14. Energy storage tower frame; 15. Support frame. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] This invention provides a gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects, such as... Figure 1 As shown, it includes a permanent magnet synchronous motor 7, a parallel shaft reducer 5, a planetary reducer 3, a fixed pulley block 9, a wire rope 8, a drum 2, a drum bearing housing 12, a safety brake 1, an emergency motor 10, a working brake 6, and an emergency brake 11.

[0023] The permanent magnet synchronous motor 7, parallel shaft reducer 5, and emergency motor 10 are all mounted on the gravity energy storage tower 14. There are four drums 2, and each drum 2 has a planetary reducer 3 installed inside. The output end of the planetary reducer 3 is fixedly connected to the inner wall of the drum 2 to drive the drum 2 to rotate. The output end of the permanent magnet synchronous motor 7 is connected to the input shaft 5.1 of the parallel shaft reducer 5 through the second coupling 13. The parallel shaft reducer 5 has a four-output structure, and its four output shafts are respectively connected to the input ends of the planetary reducers 3 in the four drums 2 through the first coupling 4.

[0024] The fixed pulley block 9 is fixedly installed on the energy storage tower frame 14, and the gravity block is equipped with a movable pulley block. After being guided by the movable pulley block and the fixed pulley block 9, the wire rope 8 is wound on the drum 2.

[0025] like Figure 3 As shown, the parallel shaft reducer 5 has a dual-input, four-output structure, including an input shaft 5.1, a reduction gearbox 5.3, an output shaft 5.2, and a drive shaft 5.4. The input shaft 5.1 and the two output shafts 5.2 are all mounted through the reduction gearbox 5.3. One end of the input shaft 5.1 is connected to the output end of the permanent magnet synchronous motor 7, and both ends of the output shafts 5.2 are connected to the input ends of the corresponding planetary reducers 3. The input shaft 5.1 is located between the two output shafts 5.2. The drive shaft 5.4 is rotatably mounted inside the reduction gearbox 5.3, between the input shaft 5.1 and the output shafts 5.2. The input shaft 5.1, output shaft 5.2, and drive shaft 5.4 are parallel to each other. An input gear 5.5 is mounted on the input shaft 5.1, a drive gear 5.6 is mounted on the drive shaft 5.4, and an output gear 5.7 is mounted on the output shaft 5.2. The input gear 5.5, drive gear 5.6, and output gear 5.7 mesh sequentially.

[0026] like Figure 2 As shown, the planetary reducer 3 includes a sun gear input shaft 3.1, a first-stage internal gear ring 3.4, a second-stage internal gear ring 3.5, a first-stage planetary carrier 3.2, a second-stage planetary carrier 3.3, a first-stage planetary gear 3.6, and a second-stage planetary gear 3.7. One end of the drum 2 is coaxially provided with a mounting hole, and one end of the sun gear input shaft 3.1 is rotatably mounted in this mounting hole via a bearing, with the sun gear input shaft 3.1 arranged coaxially with the drum 2. The other end of the sun gear input shaft 3.1 extends out of the drum 2 and is connected to the output end of the parallel shaft reducer 5 via a first coupling 4.

[0027] Both the primary internal gear ring 3.4 and the secondary internal gear ring 3.5 are fixedly installed in the mounting hole and are coaxially arranged with the sun gear input shaft 3.1. The diameter of the primary internal gear ring 3.4 is smaller than the diameter of the secondary internal gear ring 3.5. The primary sun gear 3.8 and the secondary sun gear 3.9 are installed on the sun gear input shaft 3.1 at positions corresponding to the primary internal gear ring 3.4 and the secondary internal gear ring 3.5, respectively.

[0028] The secondary planetary carrier 3.3 is fixed to the energy storage tower frame 14 via the bracket 15. The primary planetary carrier 3.2 is rotatably installed in the mounting hole via a fixed rotating shaft. The primary planetary carrier 3.2 is equipped with a primary planetary gear 3.6, and the secondary planetary carrier 3.3 is equipped with a secondary planetary gear 3.7. The primary planetary gear 3.6 meshes with the primary sun gear 3.8 and the primary internal gear ring 3.4 on the sun gear input shaft 3.1. The secondary planetary gear 3.7 meshes with the secondary sun gear 3.9 and the secondary internal gear ring 3.5 on the sun gear input shaft 3.1.

[0029] The drum bearing seat 12 is fixedly installed on the frame of the gravity energy storage tower; the end of the drum 2 away from the parallel shaft reducer 5 is rotatably installed on the drum bearing seat 12 through the bearing, so that the drum 2 can rotate around its own axis; the safety brake 1 is fixedly installed on the energy storage tower frame 14, and its braking end cooperates with the drum 2.

[0030] The output end of the emergency motor 10 is connected to the other end of the input shaft 5.1. Both the working brake 6 and the emergency brake 11 are fixedly installed on the energy storage tower frame 14. The braking end of the working brake 6 is engaged with the permanent magnet synchronous motor 7, and the emergency brake 11 is engaged with the emergency motor 10.

[0031] like Figure 4 As shown, each set of hoisting devices is a basic module, and each basic module array is installed on the energy storage tower frame 14.

[0032] This device drives four drums 2 to operate synchronously via a permanent magnet synchronous motor 7, ensuring the synchronous lifting and lowering of the four gravity blocks. Combined with the combined transmission structure of the parallel shaft reducer 5 and the planetary reducer 3, the size of the hoisting device is greatly reduced, the number of motors and control systems is reduced, and the hoisting cost is lowered. With the two-stage planetary transmission consisting of a first-stage planetary gear and a second-stage planetary gear, it is suitable for the needs of ultra-large loads of thousands of tons. The emergency brake and emergency motor significantly improve the safety of the device operation.

[0033] Working principle: During normal operation, the permanent magnet synchronous motor 7 starts, and the power is transmitted to the input shaft 5.1 of the parallel shaft reducer 5 through the second coupling 13. The input gear 5.5 on the input shaft 5.1 drives the transmission gear 5.6 on the transmission shaft 5.4 to rotate, and then drives the output gear 5.7 on the output shaft 5.2 to rotate through the transmission gear 5.6. With the help of the four-output structure of the parallel shaft reducer 5, the power is synchronously distributed to the four output shafts 5.2. Each output shaft 5.2 drives the sun gear input shaft 3.1 of the corresponding planetary reducer 3 inside the drum 2 to rotate through the first coupling 4. The first-stage sun gear 3.8 and the second-stage sun gear 3.9 on the sun gear input shaft 3.1 drive the first-stage planet gear 3.6 and the second-stage planet gear 3.7 to rotate respectively. The planet gears mesh to drive the first-stage internal gear ring 3.4 and the second-stage internal gear ring 3.5. The first-stage internal gear ring 3.4 and the second-stage internal gear ring 3.5 are fixedly engaged with the drum 2. Power is transmitted to the drum 2 through the first-stage internal gear ring 3.4 and the second-stage internal gear ring 3.5, driving the four drums 2 to rotate synchronously.

[0034] When the drum 2 rotates, the winding and unwinding actions are completed by the wire rope 8: after passing through the movable pulley group on the gravity block, the wire rope 8 is wound around the drum 2 after passing through the fixed pulley group 9. When the drum winds up the rope, it pulls the movable pulley group to drive the gravity block to rise and store energy; when the drum unwinds the rope, the gravity block descends under the action of gravity, driving the drum to rotate in the opposite direction to release energy.

[0035] The working brake 6 is used for braking control during normal start-stop of the permanent magnet synchronous motor 7; the emergency brake 11 is set for the emergency motor 10. When the permanent magnet synchronous motor 7 suddenly fails, the working brake 6 engages, the emergency motor 10 starts and releases the emergency brake 11, and takes over the power transmission to maintain the smooth lifting and lowering of the four drums 2 and avoid the gravity block from going out of control; the safety brake 1 serves as the final safety guarantee. In emergency situations (such as wire rope breakage or overspeed), it directly locks the drum 2 to achieve emergency braking of the gravity block.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects, characterized in that, Includes a permanent magnet synchronous motor (7), a parallel shaft reducer (5), a planetary reducer (3), a fixed pulley block (9), a wire rope (8), and a drum (2); The permanent magnet synchronous motor (7) and the parallel shaft reducer (5) are both installed on the energy storage tower frame (14); there are four drums (2); each drum (2) has a planetary reducer (3) installed inside, and the output end of the planetary reducer (3) is fixedly connected to the inner wall of the drum (2) to drive the drum (2) to rotate; the output end of the permanent magnet synchronous motor (7) is connected to the input shaft (5.1) of the parallel shaft reducer (5) through the second coupling (13); the parallel shaft reducer (5) is a four-output structure, and its four output shafts are respectively connected to the input ends of the planetary reducers (3) in the four drums (2) through the first coupling (4); The fixed pulley block (9) is fixedly installed on the energy storage tower frame (14), and the gravity block is equipped with a movable pulley block. The wire rope (8) is guided by the movable pulley block and the fixed pulley block (9) and then wound on the drum (2).

2. The gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects according to claim 1, characterized in that, The parallel shaft reducer (5) has a dual-input, four-output structure, including an input shaft (5.1), a reduction gearbox (5.3), an output shaft (5.2), and a transmission shaft (5.4). The input shaft (5.1) and the two output shafts (5.2) are all mounted through the reduction gearbox (5.3). One end of the input shaft (5.1) is connected to the output end of the permanent magnet synchronous motor (7), and the two ends of the output shaft (5.2) are respectively connected to the input ends of the corresponding planetary reducers (3). The input shaft (5.1) is located between the two output shafts (5.2). Inside the gearbox (5.3), and rotatably mounted between the input shaft (5.1) and the output shaft (5.2), a transmission shaft (5.4) is installed. The input shaft (5.1), the output shaft (5.2) and the transmission shaft (5.4) are parallel to each other. An input gear (5.5) is mounted on the input shaft (5.1), a transmission gear (5.6) is mounted on the transmission shaft (5.4), and an output gear (5.7) is mounted on the output shaft (5.2). The input gear (5.5), the transmission gear (5.6) and the output gear (5.7) mesh in sequence.

3. A gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects according to claim 1, characterized in that, The planetary reducer (3) includes a sun gear input shaft (3.1), a first-stage internal gear ring (3.4), a second-stage internal gear ring (3.5), a first-stage planet carrier (3.2), a second-stage planet carrier (3.3), a first-stage planetary gear (3.6), and a second-stage planetary gear (3.7). One end of the drum (2) is coaxially provided with a mounting hole, and one end of the sun gear input shaft (3.1) is rotatably mounted in the mounting hole through a bearing, and the sun gear input shaft (3.1) and the drum (2) are arranged coaxially; the other end of the sun gear input shaft (3.1) extends out of the drum (2) and is connected to the output end of the parallel shaft reducer (5) through the first coupling (4); The first-stage internal gear ring (3.4) and the second-stage internal gear ring (3.5) are both fixedly installed in the mounting hole and are arranged coaxially with the sun gear input shaft (3.1). The diameter of the first-stage internal gear ring (3.4) is smaller than the diameter of the second-stage internal gear ring (3.5). A first-stage sun gear (3.8) and a second-stage sun gear (3.9) are installed on the sun gear input shaft (3.1) at positions corresponding to the first-stage internal gear ring (3.4) and the second-stage internal gear ring (3.5), respectively. The secondary planetary carrier (3.3) is fixed to the energy storage tower frame (14) via the bracket (15), and the primary planetary carrier (3.2) is rotatably installed in the mounting hole via a fixed rotating shaft. The primary planetary carrier (3.2) is equipped with a primary planetary gear (3.6), and the secondary planetary carrier (3.3) is equipped with a secondary planetary gear (3.7). The first-stage planetary gear (3.6) meshes simultaneously with the first-stage sun gear (3.8) and the first-stage internal gear ring (3.4) on the sun gear input shaft (3.1); the second-stage planetary gear (3.7) meshes simultaneously with the second-stage sun gear (3.9) and the second-stage internal gear ring (3.5) on the sun gear input shaft (3.1).

4. A gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects according to claim 2, characterized in that, It also includes a drum bearing seat (12) and a safety brake (1). The drum bearing seat (12) is fixedly installed on the frame of the gravity energy storage tower. The end of the drum (2) away from the parallel shaft reducer (5) is rotatably installed on the drum bearing seat (12) through a bearing, so that the drum (2) can rotate around its own axis. The safety brake (1) is fixedly installed on the energy storage tower frame (14), and its braking end cooperates with the drum (2).

5. A gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects according to claim 2, characterized in that, It also includes an emergency motor (10), which is installed on the energy storage tower frame (14), and the output end of the emergency motor (10) is connected to the other end of the input shaft (5.1).

6. A gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects according to claim 5, characterized in that, It also includes a working brake (6) and an emergency brake (11), both of which are fixedly installed on the energy storage tower frame (14). The braking end of the working brake (6) is connected to the permanent magnet synchronous motor (7), and the emergency brake (11) is connected to the emergency motor (10).

7. A gravity energy storage winch device suitable for matrix-type extra-large loads and multiple objects according to claim 1, characterized in that, Each hoisting device is a basic module, and each basic module array is installed on the energy storage tower frame (14).

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