Compressed air energy storage tank
By installing a rotating lifting assembly and a lubrication system in the compressed air energy storage tank, the problems of pressure reduction and corrosion in the tank are solved, constant pressure operation and inner wall cleaning are achieved, and efficiency and service life are improved.
Patent Information
- Application Number
- CN202511079092.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-02
- Publication Date
- 2025-09-26
AI Technical Summary
In existing compressed air energy storage tanks, the internal pressure of the gas storage device continues to decrease as the energy release process proceeds without any external influence, causing the expander to deviate from the high-efficiency working point and reduce efficiency. In addition, water injected into the gas storage tank will corrode the tank body, and the high-concentration oxygen environment accelerates the corrosion rate.
By setting a rotating lifting assembly and a lower pressure plate in the tank body, and using a pneumatic clutch to control the movement of the lower pressure plate, the gas tank is kept at a constant pressure state. At the same time, a lubrication pump and lubrication grooves are set to lubricate the inner wall, and a scraper cleans the inner wall to reduce corrosion and wear.
It realizes constant pressure operation of the gas storage tank, improves thermal efficiency and service life, reduces tank corrosion and seal wear, and enhances sealing and cleanliness.
Smart Images
Figure CN120701889A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of compressed air tanks, in particular to a compressed air energy storage tank. Background Art
[0002] To meet the sustainable development of energy and environment, countries around the world have vigorously developed renewable energy, especially wind and solar energy, which have become the focus of development and utilization. However, wind and solar energy have fatal defects of intermittency and instability. During the access to the grid, they are likely to have an impact on the operation mode and power quality of the main power grid, increasing the regulation pressure of the power grid. The compressed air energy storage system stores compressed air converted from electricity when the power grid is low, and releases the stored high-pressure air to generate electricity when the power grid is peak. It is widely used. The air storage tank is one of the important core components in the compressed air energy storage system.
[0003] However, existing compressed air energy storage tanks often have the following defects: for example, since the volume of the gas tank is fixed, in the absence of external influences, the internal pressure of the gas storage device continues to decrease as the energy release work proceeds, which is a variable pressure working process, causing the expander to deviate from the high-efficiency working point, thereby reducing the efficiency of the entire compressed air energy storage system. To solve the above problems, the existing technology uses water to inject water into the gas tank to achieve a constant pressure state of the gas tank, but the water will cause corrosion to the inner wall of the tank, and the high concentration of oxygen environment in the tank will further accelerate the corrosion rate.
[0004] To this end, the present invention provides a compressed air energy storage tank. Summary of the Invention
[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the scene preparation technology is solved.
[0006] The technical solution adopted by the present invention to solve its technical problems is: a compressed air energy storage tank described in the present invention includes a tank body, a rotating lifting assembly is provided on the upper part of the tank body, the output end of the rotating lifting assembly is connected to a lower pressure plate, the lower end of the lower pressure plate is provided with a pressure regulating through hole, and an air pressure clutch for controlling the rotating lifting assembly is provided in the pressure regulating through hole, a sealing member is provided on the upper outer side of the lower pressure plate, and a lubrication groove is arranged below the seal, a lubrication pump for supplying oil to the lubrication groove is provided on the upper part of the lower pressure plate, and a receiving groove for receiving oil stains on the inner wall of the tank body is evenly opened on the lower outer side of the lower pressure plate, and a scraper is movably provided at the open end of the receiving groove.
[0007] Furthermore, the rotary lifting assembly includes a threaded sleeve, the upper part of the tank body is fixedly provided with a threaded sleeve, and the inner thread of the threaded sleeve is connected to an adjusting screw, the lower end of the adjusting screw is fixedly connected to a lower pressure plate, the upper part of the lower pressure plate is provided with a driving motor, and the output end of the driving motor is provided with a worm for driving the adjusting screw to rotate.
[0008] Furthermore, the pitch of the adjusting screw is smaller than the sum of the widths of the scrapers.
[0009] Furthermore, the pneumatic clutch includes a piston rod, a piston rod is slidably arranged in the pressure-regulating through hole, a backup pressure spring is arranged on the upper part of the piston rod, a pressure-regulating sleeve is provided on the upper part of the backup pressure spring and is threadedly connected to the lower pressure plate, the upper end of the piston rod passes through the outside of the pressure-regulating sleeve and is provided with a card for limiting, and the upper end of the piston rod is connected to a Y-shaped operating rod, a claw clutch is provided between the drive motor and the worm, and a slot matching the Y-shaped operating rod is provided on the outside of the connection between the claw clutch and the worm, and a return spring for driving the claw clutch to engage is provided on the outer side of one end of the worm.
[0010] Furthermore, the driving end of the lubrication pump is provided with a one-way transmission sleeve, the outer side of the one-way transmission sleeve is provided with a first gear, and the lower end of the adjusting screw is provided with a second gear matching the first gear.
[0011] Furthermore, a blind hole is provided in the middle of the lower end of the lower pressing plate, and an air guide channel connecting the sealing component installation groove and the blind hole is provided in the lower pressing plate.
[0012] Furthermore, an extrusion groove opposite to the air guide channel is provided on the inner side of the sealing member.
[0013] Furthermore, a spring piece is provided in the receiving groove for driving the scraper to fit against the inner wall of the tank.
[0014] The beneficial effects of the present invention are as follows: 1. The compressed air energy storage tank described in the present invention disposes a lower pressure plate inside the tank body and controls the movement of the lower pressure plate by means of internal pressure control, so that the tank body moves and adjusts according to the amount of gas in the cavity, so that the gas storage tank is always in a constant pressure state, thereby improving the thermal efficiency and exergy efficiency of the gas storage tank exhaust.
[0015] 2. The compressed air energy storage tank described in the present invention realizes the application of lubricating grease to the inner wall of the tank body by means of a lubrication pump and a lubrication groove arranged on the outer side of the lower pressure plate, thereby lubricating the lower pressure plate and the seal, thereby reducing the wear of the tank body and the seal, and at the same time making the inner wall of the tank body attached with an oil film protective layer, thereby reducing the probability of corrosion of the tank body and increasing the service life of the tank body.
[0016] 3. The compressed air energy storage tank described in the present invention, through the scraper arranged on the lower pressure plate, enables the lower pressure plate to clean the inner wall of the tank while controlling the pressure, so that the tank body is cleaned during the switching process between gas storage and exhaust, thereby cleaning the impurities attached to the inner wall of the tank, avoiding long-term corrosion damage to the tank body, thereby increasing the service life of the tank body, and preventing impurities from damaging the seal of the lower pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described below with reference to the accompanying drawings.
[0018] Figure 1 It is a perspective view of the present invention; Figure 2 It is a front cross-sectional view of the present invention; Figure 3 yes Figure 2 A cutaway perspective view of the middle part; Figure 4 It is a three-dimensional diagram of the lower pressing plate in the present invention; Figure 5 This is a perspective view of the transverse section of the lower pressing plate in the present invention; Figure 6 is a perspective view of the lubrication pump of the present invention; Figure 7 yes Figure 3 A partial enlarged view of the middle A; Figure 8 It is a three-dimensional diagram of the Y-shaped control lever in the present invention.
[0019] In the figure: 1. Tank body; 2. Rotating lifting assembly; 3. Lower pressure plate; 4. Lubrication pump; 5. Seal; 6. Air pressure clutch; 7. Scraper; 8. One-way transmission sleeve; 9. First gear; 10. Second gear; 11. Shrapnel; 20. Threaded sleeve; 21. Adjusting screw; 22. Driving motor; 23. Worm; 30. Pressure regulating hole; 31. Lubrication groove; 32. Groove; 33. Air guide channel; 50. Extrusion groove; 60. Piston rod; 61. Backup pressure spring; 62. Pressure regulating sleeve; 63. Card; 64. Y-type control lever; 65. Claw clutch; 66. Return spring. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.
[0021] Example 1: Figures 1 to 6 As shown, a compressed air energy storage tank according to an embodiment of the present invention is characterized in that a threaded sleeve 20 is fixed on the upper part of the tank body 1, and an adjusting screw 21 is threadedly connected to the threaded sleeve 20, the lower end of the adjusting screw 21 is fixedly connected to the lower pressure plate 3, and a driving motor 22 is provided on the upper part of the lower pressure plate 3. The output end of the driving motor 22 is connected to a worm 23 that drives the adjusting screw 21. The worm 23 is driven to rotate by the driving motor 23, so that the worm 23 drives the adjusting screw 21 to rotate, and then the threaded connection between the threaded sleeve 20 and the adjusting screw 21 causes the lower pressure plate 3 to rotate while moving up and down in the tank body 1.
[0022] like Figure 2 As shown, a pressure regulating through hole 30 is provided at the lower end of the lower pressure plate 3 which is slidably arranged in the tank body 1, a piston rod 60 is slidably installed in the pressure regulating through hole 30, and a transmission disc 61 is provided at the connection between the linkage sleeve 3 and the adjusting screw 21, a backup pressure spring 62 is provided on the upper part of the transmission disc 61, and the upper end of the piston rod 60 is threadedly connected to the adjusting nut 63 by passing through the transmission disc 61 and the backup pressure spring 62 in sequence, so that when exhausting, when the internal pressure of the air stored in the lower chamber of the tank body 1 is gradually reduced, the backup pressure spring 62 pushes the piston rod 60 downward, and the piston rod 60 pulls the Y-type operating screw The control rod 64 moves downward, and at the same time, under the elastic force of the return spring 66, the dog clutch 65 engages, so that the drive motor 22 can drive the worm 23 to rotate synchronously through the dog clutch 65, and then the worm 23 drives the adjusting screw 21 to rotate, so that the adjusting screw 21 drives the lower pressure plate 3 to rotate, and the connection between the threaded sleeve 20 and the adjusting screw 21 is used to make the adjusting screw 21 push the lower pressure plate 3 to move downward to reduce the air storage space, so that the air tank is always in a constant pressure state, thereby improving the thermal efficiency and exergy efficiency of the air tank exhaust.
[0023] like Figure 2 and Figure 6 As shown, a seal 5 is provided on the upper outer side of the lower pressure plate 3, and a lubrication pump 4 is provided on the upper part of the lower pressure plate 3 for supplying oil to the lubrication groove 31 provided on the outer side of the lower pressure plate 3, and a one-way transmission sleeve 8 is provided on the driving end of the lubrication pump 4. The one-way transmission sleeve 8 can adopt a one-way transmission mode of a ratchet mechanism, and a first gear 9 is provided on the outer side of the one-way transmission sleeve 8. A second gear 10 matching the first gear 9 is provided on the outer side of the adjusting screw 21, so that when the lower pressure plate 3 rotates and moves downward, the second gear 10 on the adjusting screw 21 drives the first gear 9 to rotate synchronously, so that the lubrication pump 4 works to inject oil into the lubrication groove 31 provided on the outer side of the lower pressure plate 3, thereby realizing oil lubrication of the inner wall of the tank body 1, and at the same time, the lubrication groove 31 is arranged below the seal 5, so as to realize early lubrication of the travel path of the seal 5, thereby reducing the wear and consumption of the seal 5.
[0024] like Figure 2 and Figure 3 As shown, during the implementation process, it was found that due to insufficient cleaning of the stored air, the impurities it carried adhered to the oil film after contacting the lubricating oil film with the high-pressure air, which would cause the deterioration of the oil film. At the same time, the impurities would damage the seal 5. In order to solve the above problems, a receiving groove 32 for receiving the oil stains on the inner wall of the tank body 1 was evenly opened on the lower part of the outer side of the lower pressure plate 3, and a scraper 7 was movably provided at the open end of the receiving groove 32. The scraper 7 scraped the inner wall of the tank body 1 when driven by the lower pressure plate 3, so that the old oil film layer can be cleared synchronously during the process of the lower pressure plate 3 pressing down and exhausting.
[0025] Example 2: Figure 7 and Figure 8 As shown in Comparative Example 1, another embodiment of the present invention is: like Figure 7 When the oil film is removed, the sealing member 5 is tightened, and the sealing member 5 is tightened, so that the sealing member 5 is tightened.
[0026] like Figure 8 As shown, the inner side of the seal 5 is designed to be an extrusion groove 50 opposite to the air guide channel 33, so that the inner side of the seal 5 is deformed and expanded under the push of high-pressure air, thereby preventing high-pressure air from leaking from the sealing groove.
[0027] A spring 11 is provided in the receiving groove 32 for driving the scraper 7 to fit against the inner wall of the tank body 1 , so that the scraper 7 can scrape the dirty oil on the tank wall more thoroughly.
[0028] Working principle: In the gas storage state, the lubricating oil film attached to the inner wall of the tank body 1 is used to isolate the tank body 1 from the air, thereby preventing the inner wall of the tank from being corroded.
[0029] During exhaust, when the internal pressure of the air stored in the lower chamber of the tank body 1 gradually decreases, the elastic force of the backup pressure spring 62 is used to push the piston rod 60 downward, and the piston rod 60 pulls the Y-shaped control lever 64 downward. At the same time, the elastic force of the return spring 66 is used to engage the claw clutch 65, thereby realizing the drive motor 22 to drive the worm 23 to rotate synchronously through the claw clutch 65, and then the worm 23 is used to drive the adjusting screw 21 to rotate, so that the adjusting screw 21 drives the lower pressure plate 3 to rotate, and the connection between the threaded sleeve 20 and the adjusting screw 21 is used to make the adjusting screw 21 push the lower pressure plate 3 to move downward synchronously to reduce the air storage space, so that the air storage tank is always in a constant pressure state, and at the same time, the lower pressure plate 3 is used to drive the scraper 7 to remove the old oil film layer.
[0030] At the same time, the second gear 10 on the adjusting screw 21 drives the first gear 9 to rotate synchronously, so that the lubrication pump 4 injects oil into the lubrication groove 31 arranged on the outside of the lower pressure plate 3, thereby realizing the re-lubrication of the inner wall of the tank body 1. At the same time, the lubrication groove 31 is arranged below the seal 5, so as to realize the advance lubrication of the travel path of the seal 5, thereby reducing the wear and consumption of the seal 5.
[0031] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.
[0033] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.
Claims
1. A compressed air energy storage tank, comprising a tank body (1), characterized in that: The upper part of the tank body (1) is provided with a rotary lifting assembly (2), the output end of the rotary lifting assembly (2) is connected to a lower pressure plate (3), the lower end of the lower pressure plate (3) is provided with a pressure regulating through hole (30), and a pneumatic clutch (6) for controlling the rotary lifting assembly (2) is provided in the pressure regulating through hole (30), a sealing member (5) is provided on the upper outer side of the lower pressure plate (3), and a lubrication groove (31) is arranged below the sealing member (5), a lubrication pump (4) for injecting oil into the lubrication groove (31) is provided on the upper outer side of the lower pressure plate (3), and scrapers (7) for scraping oil stains from the inner wall of the tank body (1) are evenly provided on the lower outer side of the lower pressure plate (3), and a receiving groove (32) is provided at the root of the scraper (7).
2. A compressed air energy storage tank according to claim 1, characterized in that: The rotary lifting assembly (2) comprises a threaded sleeve (20), the threaded sleeve (20) is fixedly provided on the upper part of the tank body (1), and the threaded sleeve (20) is internally threadedly connected to an adjusting screw (21), the lower end of the adjusting screw (21) is fixedly connected to a lower pressing plate (3), the upper part of the lower pressing plate (3) is provided with a driving motor (22), and the output end of the driving motor (22) is provided with a worm (23) for driving the adjusting screw (21) to rotate.
3. A compressed air energy storage tank according to claim 2, characterized in that: The pitch of the adjusting screw (21) is smaller than the sum of the widths of the scrapers (7).
4. A compressed air energy storage tank according to claim 3, characterized in that: The pneumatic clutch (6) includes a piston rod (60), a piston rod (60) is slidably arranged in the pressure regulating through hole (30), a backup pressure spring (61) is arranged on the upper part of the piston rod (60), a pressure regulating sleeve (62) threadedly connected to the lower pressure plate (3) is arranged on the upper part of the backup pressure spring (61), the upper end of the piston rod (60) passes through the pressure regulating sleeve (62) and is provided with a card (63) for limiting the position on the outside, and the upper end of the piston rod (60) is connected to a Y-shaped control rod (64), a claw clutch (65) is provided between the driving motor (22) and the worm (23), and a slot matching the Y-shaped control rod (64) is provided on the outer side of the connection between the claw clutch (65) and the worm (23), and a return spring (66) for engaging the driving claw clutch (65) is provided on the outer side of one end of the worm (23).
5. A compressed air energy storage tank according to claim 4, characterized in that: The driving end of the lubrication pump (4) is sleeved with a one-way transmission sleeve (8), the outer side of the one-way transmission sleeve (8) is sleeved with a first gear (9), and the lower end of the adjusting screw (21) is externally provided with a second gear (10) matching the first gear (9).
6. A compressed air energy storage tank according to claim 1, characterized in that: A blind hole (34) is provided in the middle of the lower end of the lower pressing plate (3), and an air guide channel (33) is provided in the lower pressing plate (3) to connect the sealing member (5) installation groove and the blind hole (34).
7. A compressed air energy storage tank according to claim 6, characterized in that: An extrusion groove (50) opposite to the air guide channel (33) is provided on the inner side of the sealing member (5).
8. The compressed air energy storage tank according to claim 1, characterized in that: A spring (11) is provided in the receiving groove (32) for driving the scraper (7) to fit against the inner wall of the tank body (1).