Large-transformation-ratio power generation transmission shaft system driving system for gravity energy storage

Abstract

The utility model relates to a large-transformation-ratio power generation transmission shaft system driving system for gravity energy storage. The large-transformation-ratio power generation transmission shaft system driving system comprises a power generation motor (1), a planetary gearbox (5), a four-output parallel shaft gearbox (9) and a traction shaft (15). One end of the generator motor (1) is connected with a planetary gearbox high-speed shaft (3) through a first coupler (2), and a planetary gearbox low-speed shaft (6) is connected with a four-output-shaft parallel gearbox high-speed shaft (8) through a second coupler (18); one ends of the four traction shafts (15) are respectively connected with the four-output-shaft parallel gearbox low-speed shaft (12) through third couplings (17), and the other ends of the four traction shafts (15) are sequentially connected with one or more traction shafts (15) through the third couplings (17). The large-transformation-ratio power generation transmission shaft system driving system has the advantages of being simple in structure, flexible in arrangement, good in expansibility, reliable in operation and the like, and is very 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 large-ratio power generation transmission shaft system driving system for gravity energy storage. Background Art

[0002] For the gravity energy storage system, when the grid has abundant electricity, the driving mechanism lifts the weight block to a high place for storage to achieve the purpose of converting the abundant electricity into the potential energy storage of the weight block. When the grid needs electricity, the weight block is lowered from a high place to a low place and the generator is driven to generate electricity during the descent process, so as to achieve the purpose of converting the potential energy of the weight block into electricity and supplying it to the grid.

[0003] At present, the transmission drive systems used internationally and domestically generally have the characteristics of complex systems, low flexibility and high cost. China Invention Patent Publication Specification CN114962190A discloses a dual-axis transmission power generation drive system based on gravity energy storage, but the system is highly complex and has low flexibility in expansion layout.

[0004] In recent years, with the continuous increase in demand in the field of energy storage, there is an urgent need for a transmission drive system that is more flexible, reliable, easy to expand, suitable for many application scenarios, and simple in system to reduce the construction cost of the energy storage system and improve the operating reliability and flexibility of the energy storage system. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model proposes a large-ratio power generation transmission shaft drive system for gravity energy storage, which can greatly reduce the construction cost of the energy storage system and improve the operational reliability and flexibility of the energy storage system.

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

[0007] A large-ratio generator transmission shaft drive system for gravity energy storage, including a generator motor, a planetary gearbox, a four-output parallel shaft gearbox and a traction shaft;

[0008] The two ends of the planetary gearbox are respectively a planetary gearbox high-speed shaft and a planetary gearbox low-speed shaft, the two ends of the four-output parallel shaft gearbox are respectively a four-output parallel shaft gearbox high-speed shaft and a four-output parallel shaft gearbox low-speed shaft, one end of the generator motor is connected to the planetary gearbox high-speed shaft through a first coupling, and the planetary gearbox low-speed shaft is connected to the high-speed shaft of the four-output parallel shaft gearbox through a second coupling;

[0009] One end of the four traction shafts is connected to the low-speed shaft of the four-output parallel gearbox through the third coupling, and the other end of the four traction shafts is connected to one or more traction shafts in sequence through the third coupling.

[0010] A further improvement of the utility model is that the four-output parallel shaft gearbox includes a first gear mounted on the high-speed shaft of the four-output parallel shaft gearbox, and a second gear and a third gear mounted on the low-speed shaft of the four-output parallel shaft gearbox, the second gear and the third gear have the same specifications and are symmetrically arranged about the first gear, and are respectively meshed with the outside of the first gear.

[0011] A further improvement of the utility model is that, according to the application scenarios of different projects, the four-output parallel shaft gearbox can be replaced by a two-output parallel shaft gearbox, that is, the third gear is removed and only the second gear is retained; a row of traction shafts corresponding to the third gear is also cancelled simultaneously.

[0012] A further improvement of the utility model is that a brake is arranged on the high-speed shaft of the planetary gearbox, which is activated when the heavy object reaches a specified position to ensure that the shaft system remains in a stopped state.

[0013] A further improvement of the utility model is that both ends of the high-speed shaft of the four-output parallel shaft gearbox are provided with a first bearing box; both ends of the low-speed shaft of the four-output parallel shaft gearbox are provided with a second bearing box; and both ends of each traction shaft are provided with a second bearing box.

[0014] A further improvement of the utility model is that each traction shaft is connected to a reel through a pin key, and the reel is used to fix and drive the steel wire rope to pull the weight block upward.

[0015] A further improvement of the utility model is that the connection mode between each traction shaft and the reel can be replaced by bolt connection or welding instead of pin-key connection.

[0016] A further improvement of the utility model is that the large-ratio generator transmission shaft drive system can determine whether to remove the planetary gearbox according to different engineering application scenarios and different ratio requirements, that is, one end of the generator motor can be directly connected to the high-speed shaft of the four-output parallel shaft gearbox.

[0017] A further improvement of the utility model is that one or more traction shafts are symmetrically arranged on both sides of the corresponding low-speed shaft of the four-output parallel-shaft gearbox.

[0018] A further improvement of the utility model is that the third coupling connecting the two traction shafts can be replaced by a flange connection according to specific needs.

[0019] Compared with the prior art, the utility model has at least the following beneficial technical effects:

[0020] In the utility model, a planetary gearbox and a four-outlet parallel shaft gearbox are used to connect the generator motor and the traction shaft arranged evenly and symmetrically, so that the power can be transmitted in a stable and reliable two-way manner between the generator motor and the traction shaft. When the gravity energy storage system needs to store the excess energy of the power grid, the generator motor drives the planetary gearbox and the four-outlet parallel shaft gearbox to transmit the power to each traction shaft arranged evenly and symmetrically. Each traction shaft pulls the weight block to a high place through a steel wire rope, so as to achieve the purpose of storing the electric energy into the potential energy of the weight. When the power grid needs the electric energy gravity energy storage system to start releasing energy, the weight block descends and drives the corresponding traction shaft to rotate through the steel wire rope, and then each traction shaft on the coaxial system synchronously drives the four-outlet parallel shaft gearbox and the planetary gearbox, so as to drive the electric generator to rotate and generate electricity.

[0021] Furthermore, the speed change module composed of a planetary gearbox and a four-output parallel shaft gearbox in the utility model can select different combinations according to different application scenarios to achieve any large ratio and large torque transmission and obtain the optimal technical and economic solution.

[0022] Furthermore, in the utility model, one or more traction shafts symmetrically arranged on both sides of the low-speed shaft of the four-output parallel gearbox constitute a row of traction modules, and each row of traction modules can be continuously extended to both sides through a coupling to achieve any combination of multiple traction shafts.

[0023] Furthermore, in the utility model, the four-outlet parallel shaft gearbox can be changed into a single-sided double-outlet parallel shaft gearbox according to the actual needs of different projects, and the traction shafts are evenly and symmetrically arranged on both sides of the double-outlet shafts, and the traction shafts can be continuously extended to both sides through couplings to realize any combination of multiple traction shafts.

[0024] In summary, the large-ratio generator transmission shaft drive system of the utility model has the characteristics of simple structure, flexible layout, good scalability, reliable operation, etc., and is very suitable for application in the field of gravity energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the thermal system of a large-ratio power generation transmission shaft system drive system for gravity energy storage described in an example of the utility model.

[0026] Description of reference numerals:

[0027] 1-generator motor, 2-first coupling, 3-planetary gearbox high-speed shaft, 4-brake, 5-planetary gearbox, 6-planetary gearbox low-speed shaft, 7-first bearing box, 8-four-out parallel shaft gearbox high-speed shaft, 9-four-out parallel shaft gearbox, 10-first gear, 11-second gear, 12-four-out parallel shaft gearbox low-speed shaft, 13-second bearing box, 14-pin key, 15-traction shaft, 16-reel, 17-third coupling, 18-second coupling, 19-third gear. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with specific implementation methods, which are intended to explain the present invention rather than to limit it.

[0029] like Figure 1 As shown, the utility model provides a large-ratio power generation transmission shaft system drive system for gravity energy storage, comprising a generator motor 1, a planetary gearbox 5, a four-output parallel shaft gearbox 9 and a traction shaft 15; the two ends of the planetary gearbox 5 are respectively a planetary gearbox high-speed shaft 3 and a planetary gearbox low-speed shaft 6, the two ends of the four-output parallel shaft gearbox 9 are respectively a four-output parallel shaft gearbox high-speed shaft 8 and a four-output parallel shaft gearbox low-speed shaft 12, one end of the generator motor 1 is connected to the planetary gearbox high-speed shaft 3 through a first coupling 2, and the planetary gearbox low-speed shaft 6 is connected to the four-output parallel shaft gearbox high-speed shaft 8 through a second coupling 18; one end of the four traction shafts 15 is respectively connected to the four-output parallel shaft gearbox low-speed shaft 12 through a third coupling 17, and the other end of the four traction shafts 15 is sequentially connected to one or more traction shafts 15 through the third coupling 17.

[0030] Preferably, the generator motor 1 is connected to the planetary gearbox 5 and the four-output parallel shaft gearbox 9 in sequence through the first coupling 2 and the second coupling 18. In this way, the generator motor 1 can drive the planetary gearbox 5 and the four-output parallel shaft gearbox 9 to move synchronously to achieve a large ratio transmission. It is also possible to remove the planetary gearbox 5 according to the application scenarios of different projects and the requirements of different ratios, and directly drive the four-output parallel shaft gearbox 9 to move synchronously by the generator motor 1, or the purpose of adjusting the speed of the low-speed shaft 12 of the four-output parallel shaft gearbox can be achieved by changing the number of teeth of the first gear 10 or the second gear 11 and the third gear 19.

[0031] Preferably, according to the application scenarios of different projects, the four-output parallel shaft gearbox 9 can be replaced by a two-output parallel shaft gearbox, that is, the third gear 19 is removed and only the second gear 11 is retained; the row of traction shafts corresponding to the third gear 19 is also cancelled simultaneously.

[0032] Preferably, both ends of the high-speed shaft 8 of the four-output parallel shaft gearbox are provided with a first bearing box 7, and both ends of the low-speed shaft 12 of the four-output parallel shaft gearbox are provided with a second bearing box 13. This supports the gear shaft and reduces the friction when the gear shafts of the first gear 10, the second gear 10 and the third gear 19 rotate. Both ends of each traction shaft 15 are provided with a second bearing box 13, which supports the traction shaft and reduces the friction when the traction shaft 15 rotates.

[0033] Preferably, a brake 4 is provided on the high-speed shaft 3 of the planetary gearbox, which is activated when the weight reaches a specified position to ensure that the shaft system remains in a stopped state.

[0034] Preferably, each traction shaft 15 is connected to a drum 16 via a pin key 14, and the drum 16 is used to fix and drive the wire rope to pull the weight block up. The connection mode of each traction shaft 15 and the drum 16 can be replaced by a bolt connection or welding by the pin key 14 connection.

[0035] Preferably, the third coupling 17 connecting the two traction shafts 15 can be replaced with a flange connection according to specific requirements of different projects.

[0036] Preferably, one or more traction shafts 15 are symmetrically arranged on both sides of the low-speed shaft 12 of the four-out parallel-axis gearbox.

[0037] The large-ratio power generation transmission shaft drive system for gravity energy storage provided by the utility model comprises the following steps during operation:

[0038] Step 1: When the gravity energy storage system needs to store energy, the generator motor drives the planetary transmission and the four-axis parallel gearbox to operate synchronously, and then the low-speed shaft of the four-axis parallel gearbox drives the traction shafts to rotate synchronously, and each traction shaft drives the wire rope to pull each weight block up, completing the storage purpose of converting electrical energy into the potential energy of the weight. When the weight block rises to the specified position, the brake on the high-speed shaft of the planetary transmission acts synchronously, so that the shaft system remains stopped, and the energy storage process is completed.

[0039] Step 2: When the gravity energy storage needs to release energy to generate electricity, the brake on the high-speed shaft of the planetary transmission is opened, and the weight block drives the steel wire rope to drive each traction shaft to rotate. The traction shaft drives the parallel shaft gearbox, the planetary gearbox and the generator motor to rotate synchronously. The generator motor generates electricity and begins to convert the potential energy of the gravity block into electrical energy. When the weight block falls to the specified position, the brake on the high-speed shaft of the planetary transmission acts synchronously, so that the shaft system remains stopped, and the energy release and power generation process is completed.

[0040] The above description is only a preferred specific implementation method of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation or application to one or more shaft systems made using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.

Claims

1. A large-ratio power generation transmission shaft drive system for gravity energy storage, characterized in that: It comprises a generator motor (1), a planetary gearbox (5), a four-output parallel shaft gearbox (9) and a traction shaft (15); The two ends of the planetary gearbox (5) are respectively a planetary gearbox high-speed shaft (3) and a planetary gearbox low-speed shaft (6); the two ends of the four-output parallel shaft gearbox (9) are respectively a four-output parallel shaft gearbox high-speed shaft (8) and a four-output parallel shaft gearbox low-speed shaft (12); one end of the generator motor (1) is connected to the planetary gearbox high-speed shaft (3) via a first coupling (2); and the planetary gearbox low-speed shaft (6) is connected to the four-output parallel shaft gearbox high-speed shaft (8) via a second coupling (18); One end of the four traction shafts (15) is connected to the low-speed shaft (12) of the four-output parallel-shaft gearbox through a third coupling (17), and the other end of the four traction shafts (15) is sequentially connected to one or more traction shafts (15) through the third coupling (17).

2. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 1 is characterized in that: The four-output parallel-axis gearbox (9) comprises a first gear (10) mounted on a high-speed shaft (8) of the four-output parallel-axis gearbox, and a second gear (11) and a third gear (19) mounted on a low-speed shaft (12) of the four-output parallel-axis gearbox. The second gear (11) and the third gear (19) have the same specifications and are symmetrically arranged with respect to the first gear (10), and are respectively externally meshed with the first gear (10).

3. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 2 is characterized in that: According to the application scenarios of different projects, the four-output parallel shaft gearbox (9) can be replaced by a two-output parallel shaft gearbox.

4. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 1 is characterized in that: A brake (4) is arranged on the high-speed shaft (3) of the planetary gearbox and is activated when the heavy object reaches a specified position to ensure that the shaft system remains in a stopped state.

5. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 1 is characterized in that: Both ends of the high-speed shaft (8) of the four-output parallel-shaft gearbox are provided with a first bearing box (7); both ends of the low-speed shaft (12) of the four-output parallel-shaft gearbox are provided with a second bearing box (13); and both ends of each traction shaft (15) are provided with a second bearing box (13).

6. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 1 is characterized in that: Each traction shaft (15) is connected to a drum (16) via a pin key (14), and the drum (16) is used to fix and drive the steel wire rope to pull the weight block upward.

7. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 6 is characterized in that: The connection mode between each traction shaft (15) and the reel (16) can be replaced by bolt connection or welding instead of pin key connection (14).

8. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 1, characterized in that: The large-ratio generator transmission shaft drive system can determine whether to remove the planetary gearbox (5) according to different engineering application scenarios and different ratio requirements, and one end of the generator motor (1) can be directly connected to the high-speed shaft (8) of the four-output parallel shaft gearbox.

9. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 1, characterized in that: One or more traction shafts (15) are symmetrically arranged on both sides of the low-speed shaft (12) of the four-output parallel shaft gearbox.

10. The large-ratio power generation transmission shaft drive system for gravity energy storage according to claim 1, characterized in that: The third coupling (17) connecting the two traction shafts (15) can be replaced with a flange connection according to specific requirements of different projects.

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