Torque control type gravity energy storage power generation transmission shaft system driving system

Abstract

The utility model relates to a torque control type gravity energy storage power generation transmission shaft system driving system which comprises a generator motor, two planetary gearboxes, two high-speed brakes, two low-speed brakes, a multi-stage series parallel shaft gearbox, a multi-stage winding drum and the like. The double-output-shaft arrangement of the generator motor is connected to high-speed shafts of the parallel-shaft gearboxes at all levels through the planetary gearboxes, and low-speed output shafts of the parallel-shaft gearboxes drive the winding drum to rotate. All the devices are symmetrically arranged along the axis and the longitudinal direction of the generator motor. The parallel shaft gearboxes are arranged on the two sides of each winding drum or the two sides of the equidistant winding drums, so that low-speed shaft torques of operation of the winding drums are effectively balanced, the torques of driving shafts of the winding drums are equal, torque gradient changes are transferred to high-speed shafts of the parallel shaft gearboxes, the number of stages of the winding drums arranged in the axial direction is increased, and the service life of the winding drums is prolonged. Meanwhile, the optimal parallel shaft gearbox stage number is determined through optimization, the total manufacturing cost of the gravity energy storage system can be remarkably reduced, and the method is suitable for being applied to the field of gravity energy storage.

Description

Technical Field

[0001] The utility model belongs to the technical field of gravity energy storage, and in particular relates to a torque-controlled gravity energy storage power generation transmission shaft system. Background Art

[0002] Among various energy storage technologies, solid gravity energy storage offers advantages such as high efficiency, long service life, and zero energy decay. When the grid is overloaded, the gravity energy storage system increases the vertical height of the weight to store gravitational potential energy. When the grid is underloaded, the weight is lowered to release the gravitational potential energy, driving a mechanical mechanism to generate electricity to fill the gap.

[0003] The tower gravity energy storage in the gravity energy storage technology solution is mainly achieved by designing and constructing artificial buildings, and by designing and arranging the shaft transmission system at the appropriate position of the building, and changing the height of the weight block during operation to achieve the energy storage and power generation process. In order to improve the efficiency of the gravity energy storage system and the cost per unit capacity of energy storage, increasing the mass of the unit weight block and using a single drive shaft to drive multiple weight blocks to run in parallel is the most effective method. However, as the number of weight blocks running in parallel increases, the torque on the rotating shaft that directly drives the lifting of the weight blocks continues to increase. When equipped with a gearbox, the low-speed shaft closest to the generator side will need to bear the total torque transmitted to the shaft system by all the weight blocks away from the generator, resulting in the low-speed shaft being too large or requiring the use of higher-grade materials, limiting the capacity of the energy storage and power generation unit, significantly increasing the system cost, and reducing the stability and reliability of the system.

[0004] At present, tower gravity energy storage technology is in a process of vigorous development. For the purpose of system operation safety and reducing investment, there is an urgent need for a gravity energy storage power generation transmission shaft drive system that can control the shaft torque of the energy storage power generation system. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model proposes a torque-controlled gravity energy storage power generation transmission shaft system drive system. The method of the utility model can significantly reduce the extreme value of the low-speed shaft torque in the shaft system of the tower gravity energy storage system, reduce the shaft system size and brake parameters, thereby effectively reducing the construction cost of the energy storage system and significantly improving the safety and reliability of the gravity energy storage system.

[0006] The utility model is realized through the following technical solutions:

[0007] A torque-controlled gravity energy storage power generation transmission shaft drive system, comprising a generator motor, two planetary gearboxes, multiple parallel shaft gearboxes and multiple drums;

[0008] A parallel shaft gearbox includes a parallel shaft gearbox high-speed gear, two parallel shaft gearbox low-speed gears, a high-speed shaft and two low-speed shafts; the two parallel shaft gearbox low-speed gears are symmetrically arranged on both sides of the high-speed shaft and mesh with the parallel shaft gearbox high-speed gears respectively;

[0009] The two ends of the generator motor are connected to the generator coupling and the high-speed shaft of the planetary gearbox in sequence through the planetary gearbox, and the low-speed shaft of the planetary gearbox is connected to the input shaft coupling of the parallel shaft gearbox group and the high-speed shaft of the first-stage parallel shaft gearbox in sequence;

[0010] The first-stage parallel shaft gearbox high-speed shaft is connected in sequence to the second-stage parallel shaft gearbox high-speed shaft, the third-stage parallel shaft gearbox high-speed shaft, the fourth-stage parallel shaft gearbox high-speed shaft and the fifth-stage parallel shaft gearbox high-speed shaft by means of a parallel shaft gearbox inter-coupling;

[0011] Each parallel shaft gearbox low-speed gear is connected to the parallel shaft gearbox low-speed shaft, the parallel shaft gearbox low-speed shaft is connected to the reel shaft through the parallel shaft gearbox and reel shaft coupling, and the reel shaft is connected to the reel.

[0012] A further improvement of the present invention is that all devices on both sides of the generator motor are arranged symmetrically.

[0013] A further improvement of the present invention is that all devices on both sides of the high-speed shaft of the parallel shaft gearbox are symmetrically arranged.

[0014] A further improvement of the present invention is that a low-speed brake is provided on the high-speed shaft of the first-stage parallel shaft gearbox, and the brake is a shaft-holding brake or a disc brake; a high-speed brake is provided on the high-speed shaft of the planetary gearbox, and the brake is a disc brake.

[0015] A further improvement of the present invention is that the parallel shaft gearbox and the drum on one side of the generator motor are both provided with multiple stages; one parallel shaft gearbox is arranged on each side of each drum, or one parallel shaft gearbox is arranged on each side of two or more drums.

[0016] A further improvement of the present invention is that the parallel shaft gearbox inter-shaft coupling and the parallel shaft gearbox and drum shaft coupling are all rigid couplings; the planetary gearbox and generator coupling, and the planetary gearbox low-speed shaft and parallel shaft gearbox group input shaft coupling are flexible couplings.

[0017] A further improvement of the present invention is that the rigid coupling adopts a radial key rigid coupling, a parallel shaft coupling, a sleeve coupling, a flange coupling and a clamping shell coupling.

[0018] A further improvement of the present invention is that the flexible coupling adopts a slider coupling, a gear coupling and a drum-shaped gear coupling.

[0019] A further improvement of the present invention is that bearing boxes are arranged on both sides of the generator motor, parallel axis gearbox high-speed shaft is provided with parallel axis gearbox high-speed shaft bearing boxes on both sides of the gearbox, parallel axis gearbox low-speed shaft bearing boxes are provided on both sides of the gearbox, and drum bearing boxes are provided on both sides of the drum.

[0020] A further improvement of the present invention is that the total transformation ratio between the generator shaft and the drum shaft is n 0, can be set by setting the ratio of the parallel shaft gearbox low speed gear and the parallel shaft gearbox high speed gear n 1 to adjust, or by setting the ratio of the planetary gearbox n 2 to adjust to satisfy the equation of formula (1);

[0021] (1) .

[0022] The utility model has at least the following beneficial technical effects:

[0023] The utility model provides a torque-controlled gravity energy storage power generation transmission shaft system drive system, which adopts a multi-stage parallel shaft gearbox in series. Parallel shaft gearboxes are set on both sides of each or equidistant reel, effectively balancing the low-speed shaft torque driving the reel, making the torque of each reel driving shaft equal, and transferring the torque gradient to the high-speed shaft of the parallel shaft gearbox. Since the high-speed shaft speed is increased, the peak torque value of the shaft system is reduced, and the shaft system size is significantly reduced under the condition of unchanged power generation and energy storage capacity.

[0024] By adopting the utility model, since the torque of the driving reel shaft is balanced and the peak torque of the shaft system is reduced, the number of reels arranged in the axial direction can be increased without changing the size of the shaft system, thereby improving the power generation and energy storage capacity of the unit energy storage system, thereby saving the investment in the gearbox and generator under the unit energy storage capacity and reducing the total cost of the gravity energy storage system.

[0025] The shaft drive system described in the utility model is symmetrically arranged along the longitudinal and transverse directions of the generator, which maximizes the power generation and energy storage capacity of the system unit energy storage system and further reduces the total cost of the gravity energy storage system.

[0026] In the technical solution of the present utility model, the optimal number of parallel shaft gearbox stages can be optimized and determined according to basic parameters such as power generation capacity, weight block size, generator speed, etc., thereby further reducing the total cost of the gravity energy storage system.

[0027] In summary, the torque-controlled gravity energy storage power generation transmission shaft drive system of the utility model improves the power generation and energy storage capacity of the unit energy storage system by balancing the torque of each drum shaft and transferring the torque step by step to the high-speed shaft side of the parallel shaft gearbox, significantly reduces the total cost of the gravity energy storage system, and is suitable for application in the field of tower gravity energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a torque-controlled gravity energy storage power generation transmission shaft drive system of the utility model.

[0029] Description of reference numerals:

[0030] 1-generator motor, 2-generator motor bearing box, 3-generator shaft, 4-planetary gearbox and generator coupling, 5-high-speed brake, 6-planetary gearbox high-speed shaft, 7-planetary gearbox, 8-planetary gearbox low-speed shaft, 9-planetary gearbox low-speed shaft and parallel shaft gearbox input shaft coupling, 10-low-speed brake, 11-first-stage parallel shaft gearbox high-speed shaft, 12-parallel shaft gearbox high-speed shaft bearing box, 13-parallel shaft gearbox inter-shaft coupling, 14-second-stage parallel shaft gearbox high-speed shaft, 15-third-stage parallel shaft gearbox high-speed shaft, 16-fourth-stage parallel shaft gearbox high-speed shaft, 17-fifth-stage parallel shaft gearbox high-speed shaft, 18-parallel gearbox high-speed gear, 19-parallel shaft gearbox low-speed gear, 20-reel bearing box, 21-parallel shaft gearbox low-speed shaft bearing box, 22-parallel shaft gearbox and reel shaft coupling, 23-parallel shaft gearbox, 24-reel, 25-parallel shaft gearbox low-speed shaft, 26-reel shaft. DETAILED DESCRIPTION

[0031] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0034] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0036] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0037] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes, relative sizes, and positional relationships of the various regions and layers shown in the figures are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] Example 1

[0040] like Figure 1As shown, the present embodiment provides a torque-controlled gravity energy storage power generation transmission shaft drive system, comprising a generator motor 1, two planetary gearboxes 7, multiple parallel shaft gearboxes 23 and multiple reels 24; a parallel shaft gearbox 23 contains a parallel gearbox high-speed gear 18, two parallel shaft gearbox low-speed gears 19, a high-speed shaft and two low-speed shafts; the two parallel shaft gearbox low-speed gears 19 are symmetrically arranged on both sides of the high-speed shaft and are respectively engaged with the parallel gearbox high-speed gear 18; the two ends of the generator motor 1 are respectively connected to the generator coupling 4 and the planetary gearbox high-speed shaft 6 through the planetary gearbox 7 in sequence. The planetary gearbox low-speed shaft 8 is connected in sequence with the parallel axis gearbox group input shaft coupling 9 and the first-stage parallel axis gearbox high-speed shaft 11; the first-stage parallel axis gearbox high-speed shaft 11 is connected in sequence with the second-stage parallel axis gearbox high-speed shaft 14, the third-stage parallel axis gearbox high-speed shaft 15, the fourth-stage parallel axis gearbox high-speed shaft 16 and the fifth-stage parallel axis gearbox high-speed shaft 17 via the parallel axis gearbox inter-coupling 13; each parallel axis gearbox low-speed gear 19 is connected to the parallel axis gearbox low-speed shaft 25, the parallel axis gearbox low-speed shaft 25 is connected to the reel shaft 26 through the parallel axis gearbox and the reel shaft coupling 22, and the reel shaft 26 is connected to the reel.

[0041] Example 2

[0042] like Figure 1 As shown, this embodiment provides a torque-controlled gravity energy storage power generation transmission shaft drive system, including: 1 generator motor 1, 2 planetary gearboxes 7, 2 high-speed brakes 5, 2 low-speed brakes 10, a multi-stage parallel shaft gearbox 23 and a multi-stage reel 24.

[0043] The two ends of the generator motor 1 are connected to the generator coupling 4 and the planetary gearbox high-speed shaft 6 in sequence through the planetary gearbox 7, and the planetary gearbox low-speed shaft 8 is connected to the parallel axis gearbox group input shaft coupling 9 and the first-level parallel axis gearbox high-speed shaft 11 in sequence. Figure 1 All devices in areas A and B on both sides of the generator motor 1 are arranged symmetrically.

[0044] In this embodiment, the first-stage parallel axis gearbox high-speed shaft 11 is connected to the second-stage parallel axis gearbox high-speed shaft 14, the third-stage parallel axis gearbox high-speed shaft 15, the fourth-stage parallel axis gearbox high-speed shaft 16 and the fifth-stage parallel axis gearbox high-speed shaft 17 in sequence by means of the parallel axis gearbox coupling 13; wherein, a parallel axis gearbox 23 includes a parallel axis gearbox high-speed gear 18, two parallel axis gearbox low-speed gears 19, a high-speed shaft and two low-speed shafts; the two parallel axis gearbox low-speed gears 19 are symmetrically arranged on both sides of the high-speed shaft and are respectively engaged with the parallel axis gearbox high-speed gear 18. Figure 1 All devices on both sides of the high-speed shaft 11 of the parallel shaft gearbox are arranged symmetrically.

[0045] In this embodiment, each parallel axis gearbox low speed gear 19 is connected to the parallel axis gearbox low speed shaft 25, the parallel axis gearbox low speed shaft 25 is connected to the reel shaft 26 through the parallel axis gearbox and reel shaft coupling 22, and the reel shaft 26 is connected to the reel.

[0046] In this embodiment, the parallel shaft gearbox inter-shaft coupling 13 and the parallel shaft gearbox and drum shaft coupling 22 are all rigid couplings, and radial key rigid couplings, parallel shaft couplings, sleeve couplings, flange couplings and clamp couplings can be used; the planetary gearbox and generator coupling 4, and the planetary gearbox low-speed shaft and parallel shaft gearbox group input shaft coupling 9 are flexible couplings, and slider couplings, gear couplings, and drum gear couplings can be used.

[0047] In this embodiment, bearing boxes 2 are set on both sides of the generator motor 1, parallel axis gearbox 23 high-speed shaft is provided with parallel axis gearbox high-speed shaft bearing boxes 12 on both sides of the gearbox, parallel axis gearbox low-speed shaft bearing boxes 21 are provided on both sides of the gearbox, and drum bearing boxes 20 are provided on both sides of the drum 24.

[0048] In this embodiment, a low-speed brake 10 is provided on the high-speed shaft 11 of the first-stage parallel shaft gearbox, and the brake is a shaft-holding brake or a disc brake; a high-speed brake 5 is provided on the high-speed shaft 6 of the planetary gearbox, and the brake is a disc brake; during normal operation, the high-speed brake 5 is used as the working brake, that is, after the weight block runs to a set height during the energy storage and release process, the high-speed brake 5 is used to brake and stop the unit. When the unit is in a long-term static state, the low-speed brake 10 is switched to brake to keep the shaft system static.

[0049] In this embodiment, the parallel shaft gearbox 23, the drum 24, etc. on one side of the generator motor 1 can be set to multiple levels, not limited to Figure 1 each drum 24 may be arranged on both sides of a parallel shaft gearbox 23, or two or more drums 24 may be arranged on both sides of a parallel shaft gearbox 23.

[0050] In this embodiment, the total transformation ratio between the generator shaft 3 and the drum shaft 26 is n 0, by setting the ratio of the parallel shaft gearbox low speed gear 19 and the parallel shaft gearbox high speed gear 18 n 1 to adjust, or by setting the ratio of the planetary gearbox 7 n 2 to adjust to meet the equation of formula 1; if the ratio requirement is low, the planetary gearbox 7 can be cancelled.

[0051] (1)

[0052] The utility model provides a torque-controlled gravity energy storage power generation transmission shaft drive system, which, when in operation, comprises the following steps:

[0053] Step 1: Energy storage. The generator motor switches to motor mode and transmits power to the high-speed shafts of the parallel gearboxes via the planetary gearbox. The parallel gearbox then transmits power to the drum shaft, which in turn drives the drum to rotate, raising the weight vertically and increasing its gravitational potential energy. When the weight reaches the commanded position, the high-speed brake is applied to terminate the energy storage process.

[0054] Step 2: Static process. When the gravity energy storage system finishes storing energy and needs to rest for a period of time, the low-speed brake engages and the high-speed brake exits the braking state, causing the weight to hover at a specific height, awaiting the energy release command.

[0055] Step 3: Energy Release. The generator motor switches to generator mode, the low-speed brake gradually releases, and the weight begins to descend. Energy is transferred to the generator motor via the wire rope, drum, parallel shaft gearbox, and planetary gearbox. When the weight reaches the designated position, the high-speed brake engages, halting the power generation process and ending.

[0056] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0057] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any changes made based on the technical solution in accordance with the technical concept proposed by the present utility model shall fall within the scope of protection of the claims of the present utility model.

Claims

1. A torque-controlled gravity energy storage power generation transmission shaft drive system, characterized in that: It includes a generator motor (1), two planetary gearboxes (7), a plurality of parallel shaft gearboxes (23) and a plurality of reels (24); A parallel shaft gearbox (23) includes a parallel shaft gearbox high-speed gear (18), two parallel shaft gearbox low-speed gears (19), a high-speed shaft, and two low-speed shafts; the two parallel shaft gearbox low-speed gears (19) are symmetrically arranged on both sides of the high-speed shaft and are respectively engaged with the parallel shaft gearbox high-speed gear (18); The two ends of the generator motor (1) are connected to the generator coupling (4) and the planetary gearbox high-speed shaft (6) in sequence through the planetary gearbox (7), and the planetary gearbox low-speed shaft (8) is connected to the parallel shaft gearbox group input shaft coupling (9) and the first-stage parallel shaft gearbox high-speed shaft (11) in sequence; The first-stage parallel shaft gearbox high-speed shaft (11) is connected in sequence to the second-stage parallel shaft gearbox high-speed shaft (14), the third-stage parallel shaft gearbox high-speed shaft (15), the fourth-stage parallel shaft gearbox high-speed shaft (16) and the fifth-stage parallel shaft gearbox high-speed shaft (17) by means of a parallel shaft gearbox inter-coupling (13); Each parallel shaft gearbox low speed gear (19) is connected to a parallel shaft gearbox low speed shaft (25), the parallel shaft gearbox low speed shaft (25) is connected to a reel shaft (26) through a parallel shaft gearbox and reel shaft coupling (22), and the reel shaft (26) is connected to the reel.

2. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 1, characterized in that: All devices on both sides of the generator motor (1) are arranged symmetrically.

3. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 1, characterized in that: All devices on both sides of the parallel shaft gearbox high-speed shaft (11) are arranged symmetrically.

4. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 1, characterized in that: A low-speed brake (10) is provided on the high-speed shaft (11) of the first-stage parallel shaft gearbox, and the brake is a shaft-holding brake or a disc brake; a high-speed brake (5) is provided on the high-speed shaft (6) of the planetary gearbox, and the brake is a disc brake.

5. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 1, characterized in that: The parallel shaft gearbox (23) and the drum (24) on one side of the generator motor (1) are both provided with multiple stages; one parallel shaft gearbox (23) is arranged on both sides of each drum (24), or one parallel shaft gearbox (23) is arranged on both sides of two or more drums (24).

6. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 1, characterized in that: The parallel shaft gearbox inter-shaft coupling (13) and the parallel shaft gearbox and drum shaft coupling (22) are all rigid couplings; the planetary gearbox and generator coupling (4) and the planetary gearbox low-speed shaft and parallel shaft gearbox group input shaft coupling (9) are flexible couplings.

7. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 6, characterized in that: The rigid couplings include radial key rigid couplings, parallel shaft couplings, sleeve couplings, flange couplings and clamp couplings.

8. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 6, characterized in that: The flexible coupling adopts a slider coupling, a gear coupling and a drum-shaped gear coupling.

9. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 1, characterized in that: Bearing boxes (2) are provided on both sides of the generator motor (1), parallel shaft gearbox (23) high-speed shaft bearing boxes (12) are provided on both sides of the gearbox, parallel shaft gearbox low-speed shaft bearing boxes (21) are provided on both sides of the gearbox, and reel bearing boxes (20) are provided on both sides of the reel (24).

10. The torque-controlled gravity energy storage power generation transmission shaft drive system according to claim 1, characterized in that: Total transformation ratio between the generator shaft (3) and the drum shaft (26) n 0, can be achieved by setting the ratio of the parallel shaft gearbox low speed gear (19) and the parallel shaft gearbox high speed gear (18) n 1 to adjust, or by setting the ratio of the planetary gearbox (7) n 2 to adjust to satisfy the equation of formula (1); （1） 。

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