Damping device

Abstract

The invention provides a damping device, which comprises a water jacket assembly, a damping device and a damping device, and is characterized in that the water jacket assembly is internally provided with an oil groove for accommodating damping oil; the damping body is arranged in the oil groove, a first spiral groove is formed in the middle of the damping body in a penetrating mode, and a second spiral groove is vertically formed in the outer side of the damping body; the damping body base is arranged at the bottom of the oil groove and is used for supporting the damping body; a ball socket matched with a shaft is arranged at the top of the first spiral groove; wherein the water jacket assembly is used for cooling damping oil in an oil groove; the spiral direction of the first spiral groove is opposite to the rotating direction of the shaft, and the first spiral groove is used for guiding low-temperature damping oil at the bottom of the oil groove to the ball socket and the shaft when the shaft rotates. The spiral direction of the second spiral groove is the same as the rotating direction of the shaft and used for guiding high-temperature damping oil on the upper portion of the oil groove to the bottom of the oil groove for cooling when the shaft rotates. Interaction of high-temperature damping oil on the upper portion and low-temperature damping oil at the bottom of the oil groove can be achieved, and the temperature of the shaft and the ball socket is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of damping, and particularly to a damping device. Background Art

[0002] The flywheel energy storage system is a physical energy storage system, which has the advantages of high power, fast response, long life, frequent charge and discharge, safety and environmental protection. The bearing system adopted by the flywheel energy storage system is a heavy-load hydrodynamic bearing system, which has low cost and high reliability. However, this hydrodynamic bearing system needs to be matched with a damping device that meets the requirements of high stiffness, strong heat dissipation and large damping to ensure the stability and seismic performance of the rotor system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a damping device that can realize the interaction between the high-temperature damping oil in the upper part of the oil sump and the low-temperature damping oil at the bottom, reduce the temperature of the shaft and the ball socket, and ensure the stable operation of the system.

[0004] To solve the above technical problem, the technical solution of the present invention is as follows: A damping device, comprising:

[0005] A water jacket assembly, in which an oil sump for accommodating damping oil is provided;

[0006] A damping body disposed in the oil sump, a first spiral groove is provided through the middle of the damping body, and a second spiral groove is vertically provided on the outer side of the damping body;

[0007] A damping body base disposed at the bottom of the oil sump to support the damping body;

[0008] A ball socket matching the shaft is provided at the top of the first spiral groove;

[0009] Wherein, the water jacket assembly is used to cool the damping oil in the oil sump;

[0010] The spiral direction of the first spiral groove is opposite to the rotation direction of the shaft, and is used to divert the low-temperature damping oil at the bottom of the oil sump to the ball socket and the shaft when the shaft rotates;

[0011] The spiral direction of the second spiral groove is the same as the rotation direction of the shaft, and is used to divert the high-temperature damping oil in the upper part of the oil sump to the bottom of the oil sump for cooling when the shaft rotates.

[0012] Optionally, the present damping device further comprises:

[0013] A damping base disposed at the bottom of the water jacket assembly.

[0014] Optionally, the water jacket assembly and the damping base are fixedly connected by bolts.

[0015] Optionally, the water jacket assembly comprises:

[0016] The inner wall of the water jacket assembly that forms the oil sump;

[0017] The outer shell of the water jacket assembly provided on the outer side of the inner wall of the water jacket assembly;

[0018] The water cooling joint provided on the outer shell of the water jacket assembly;

[0019] Wherein, a water jacket with a set width is provided between the outer shell of the water jacket assembly and the inner wall of the water jacket assembly, and the water cooling joint is used to supply cooling water to the water jacket and discharge warm water.

[0020] Optionally, a spiral water channel for guiding the cooling water is provided in the water jacket.

[0021] Optionally, at least two groups of elastic support rods are vertically provided between the damping body and the damping body base.

[0022] Optionally, a set distance exists between the damping body and the inner wall of the water jacket assembly.

[0023] Optionally, the first spiral groove and the second spiral groove are T-shaped grooves.

[0024] Optionally, the damping body includes:

[0025] The inner ring of the damping body, and the first spiral groove is provided on the inner wall of the inner ring of the damping body;

[0026] The outer ring of the damping body provided on the outer side of the inner ring of the damping body, and the second spiral groove is provided on the inner wall of the outer ring of the damping body.

[0027] Optionally, the distance between the bottom of the first spiral groove and the bottom of the oil sump is less than the distance between the second spiral groove and the bottom of the oil sump.

[0028] The above solution of the present invention has at least the following beneficial effects:

[0029] In the above solution of the present invention, the spiral direction of the first spiral groove is opposite to the shaft rotation direction. When the shaft rotates, the low-temperature damping oil at the bottom of the oil sump is guided to the ball socket and the shaft. The spiral direction of the second spiral groove is the same as the shaft rotation direction. When the shaft rotates, the high-temperature damping oil at the upper part of the oil sump is guided to the bottom of the oil sump for cooling, which can realize the interaction between the high-temperature damping oil at the upper part of the oil sump and the low-temperature damping oil at the bottom, reduce the temperature of the shaft and the ball socket, and ensure the stable operation of the system.

[0030] The stable temperature environment of the shaft and the ball socket can ensure that physical properties such as the viscosity of the damping oil are maintained near the design values, thereby ensuring that the damping device can continuously provide a stable and required damping coefficient. When the flywheel energy storage system passes through the critical speed, the stable damping characteristics can effectively suppress the system vibration, reduce the amplitude, enable the system to safely pass through the critical speed, and stably operate at the working speed for a long time, greatly improving the reliability and operating efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the damping device of the present invention.

[0032] Figure 2 is a schematic structural diagram of the second spiral groove of the damping device of the present invention.

[0033] Figure 3 is a schematic structural diagram of the first spiral groove of the damping device of the present invention.

[0034] DESCRIPTION OF THE REFERENCE NUMERALS:

[0035] 1, damping base; 2, inner wall of the water jacket assembly; 3, outer shell of the water jacket assembly; 4, damping body base; 5, elastic support rod; 6, inner ring of the damping body; 7, outer ring of the damping body; 8, ball socket; 9, shaft; 10, oil groove, 11, water cooling joint, 12, first spiral groove; 13, second spiral groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Hereinafter, the exemplary embodiments of the present invention will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0037] As Figure 1 shown, an embodiment of the present invention provides a damping device, including:

[0038] A water jacket assembly, wherein an oil groove 10 for accommodating damping oil is provided inside the water jacket assembly;

[0039] A damping body provided in the oil groove 10, a first spiral groove 12 is provided through the middle of the damping body, and a second spiral groove 13 is provided vertically on the outside of the damping body;

[0040] A damping body base 4 provided at the bottom of the oil groove 10 to support the damping body;

[0041] A ball socket 8 matching the shaft 9 is provided at the top of the first spiral groove 12;

[0042] Among them, the water jacket assembly is used to cool the damping oil in the oil sump 10;

[0043] The spiral direction of the first spiral groove 12 is opposite to the rotation direction of the shaft 9, and is used to guide the low-temperature damping oil at the bottom of the oil sump 10 to the ball socket 8 and the shaft 9 when the shaft 9 rotates;

[0044] The spiral direction of the second spiral groove 13 is the same as the rotation direction of the shaft 9, and is used to guide the high-temperature damping oil at the upper part of the oil sump 10 to the bottom of the oil sump 10 for cooling when the shaft 9 rotates.

[0045] In this example, the spiral direction of the first spiral groove 12 is opposite to the rotation direction of the shaft 9. When the shaft 9 rotates, the low-temperature damping oil at the bottom of the oil sump 10 is guided to the ball socket 8 and the shaft 9. The spiral direction of the second spiral groove 13 is the same as the rotation direction of the shaft 9. When the shaft 9 rotates, the high-temperature damping oil at the upper part of the oil sump 10 is guided to the bottom of the oil sump 10 for cooling, which can realize the interaction between the high-temperature damping oil at the upper part of the oil sump 10 and the low-temperature damping oil at the bottom, reduce the temperature of the shaft 9 and the ball socket 8, and ensure the stable operation of the system.

[0046] The stable temperature environment of the shaft 9 and the ball socket 8 can ensure that the physical properties such as the viscosity of the damping oil are maintained near the design value, thereby ensuring that the damping device can continuously provide a stable and required damping coefficient. When the flywheel energy storage system passes through the critical speed, the stable damping characteristics can effectively suppress the system vibration, reduce the amplitude, enable the system to safely pass through the critical speed, and stably operate at the working speed for a long time, greatly improving the reliability and operating efficiency of the system.

[0047] In an alternative embodiment of the present invention, the damping device further includes:

[0048] A damping base 1 provided at the bottom of the water jacket assembly, and the water jacket assembly is fixedly connected to the damping base 1 by bolts.

[0049] In this example, during the operation of the flywheel energy storage system, the damping device will be subjected to vibrations and impact forces in various directions. The bolt connection method can effectively resist these external forces, maintain the stability of the entire damping device structure, and ensure the accuracy of the relative positions of the internal components.

[0050] In an alternative embodiment of the present invention, the water jacket assembly includes:

[0051] The inner wall 2 of the water jacket assembly that forms the oil sump 10;

[0052] A water jacket assembly housing 3 provided outside the inner wall 2 of the water jacket assembly;

[0053] A water cooling joint 11 provided on the water jacket assembly housing 3;

[0054] Wherein, a water jacket with a set width is provided between the outer shell 3 of the water jacket assembly and the inner wall 2 of the water jacket assembly, and the water cooling joint 11 is used to supply cooling water to the water jacket and discharge warm water.

[0055] Specifically, a spiral water channel for guiding the cooling water is provided in the water jacket. The damping body base 4 and the inner wall 2 of the water jacket assembly are in small clearance fit to ensure that the damping body base 4 can be taken out and placed into the inner wall 2 of the water jacket assembly.

[0056] In this example, the cooling water is introduced into the water jacket assembly through the water cooling joint 11, and the water jacket assembly cools the damping oil in the oil sump 10 to ensure that when the shaft 9 rotates, the damping oil is cooled, thereby reducing the temperature of the shaft 9 and the ball socket 8 and ensuring the stable operation of the system.

[0057] The design of the spiral water channel significantly increases the contact area and contact time between the cooling water and the inner wall 2 of the water jacket assembly, enhancing the heat exchange efficiency.

[0058] Temperature has a significant impact on key properties such as the viscosity of the damping oil. The good cooling effect of the water jacket assembly ensures that the viscosity of the damping oil is stable under different working conditions, thereby maintaining the high stiffness and large damping characteristics of the damping device.

[0059] In an alternative embodiment of the present invention, at least two groups of elastic support rods 5 are vertically provided between the damping body and the damping body base 4.

[0060] Specifically, the elastic support rods 5 are connected to the damping body and the damping body base 4 by interference fitting or screwing in. Two or more elastic support rods 5 are used to achieve the target strength (1000 - 1000000 N / m). The positions of the respective elastic support rods 5 are on the same horizontal concentric circle (the center of the circle is the center of the damping body and the damping body base 4), and they are evenly distributed.

[0061] In this example, setting at least two groups of elastic support rods 5 evenly distributed on the same concentric circle can evenly transfer the load borne by the damping body to the damping body base 4. By reasonably designing and selecting two or more elastic support rods 5, a target strength of 1000 - 1000000 N / m can be achieved, providing appropriate stiffness for the damping device.

[0062] The elastic characteristics of the elastic support rods 5 enable them to play a role in buffering and absorbing energy when subjected to vibration and shock. When the system encounters external vibration interference, the elastic support rods 5 convert the vibration energy into elastic potential energy through their own elastic deformation, thereby reducing the impact of vibration on the damping body and the entire system.

[0063] As Figure 2 、 Figure 3 shown, in an alternative embodiment of the present invention, the damping body includes:

[0064] The inner ring 6 of the damper body, and the first spiral groove 12 is provided on the inner wall of the inner ring 6 of the damper body;

[0065] The outer ring 7 of the damper body is arranged outside the inner ring 6 of the damper body, and the second spiral groove 13 is provided on the inner wall of the outer ring 7 of the damper body.

[0066] Specifically, the first spiral groove 12 and the second spiral groove 13 are T-shaped grooves. The ball socket 8 and the outer ring 7 of the damper body as well as the inner ring 6 of the damper body are assembled together by an interference fit method.

[0067] During specific operation, the shaft 9 rotates counterclockwise at a high speed, driving the damping oil around the shaft 9 to rotate counterclockwise. The second spiral groove 13 also has a counterclockwise helix direction. The high-temperature damping oil at the shaft 9 and the ball socket 8 flows along the second spiral groove 13 to the bottom of the oil groove 10 for cooling; the shaft 9 rotates counterclockwise at a high speed, driving the damping oil around the shaft 9 to rotate counterclockwise. The first spiral groove 12 has a clockwise helix direction. The low-temperature damping oil at the bottom of the oil groove 10 flows along the first spiral groove 12 to the ball socket 8 and the shaft 9, realizing the interaction between the high-temperature damping oil in the upper part of the oil groove 10 and the low-temperature damping oil at the bottom, keeping the temperature of the damping oil at the shaft 9 and the ball socket 8 within the designed requirement range, and further ensuring the damping coefficient.

[0068] In this example, when the shaft 9 rotates counterclockwise at a high speed, the first spiral groove 12 and the second spiral groove 13 can skillfully guide the damping oil to form an efficient circulating flow. The high-temperature damping oil flows along the second spiral groove 13 to the bottom of the oil groove 10, while the low-temperature damping oil flows to the shaft 9 and the ball socket 8 through the first spiral groove 12. This circulating path design greatly increases the flow distance and mixing degree of the oil fluid. Compared with the simple convection method, the heat exchange efficiency is greatly improved, and the heat generated at the shaft 9 and the ball socket 8 can be quickly and effectively taken away, realizing precise temperature control.

[0069] The shaft 9 and the ball socket 8, as the key friction parts of the system, are extremely prone to temperature rise due to friction heat generation. Through the synergistic effect of the first spiral groove 12 and the second spiral groove 13, the temperature of the damping oil at the shaft 9 and the ball socket 8 can always be maintained within the designed requirement range.

[0070] In an optional embodiment of the present invention, there is a set distance between the damper body and the inner wall 2 of the water jacket assembly.

[0071] Specifically, a set distance (0.5 mm to 10 mm) is selected between the outer ring 7 of the damper and the inner wall 2 of the water jacket assembly. The large damping characteristic is jointly determined by this set distance, the viscosity coefficient of the damping oil, and the temperature of the damping oil. The viscosity coefficient of the damping oil is selected as a set viscosity coefficient to provide a relatively high damping coefficient (1000 to 100000 N·s / m). When the flywheel energy storage system passes through the critical point, the vibration of the rotor is very large. Without damping, the amplitude is very large, and the rotor cannot continue to increase its speed due to knocking against the bearing. Through the damping device of the present invention, the vibration amplitude is reduced, and the rotor smoothly passes through the critical speed when increasing its speed.

[0072] In this example, the set distance interacts with the viscosity coefficient and temperature of the damping oil to jointly determine the large damping characteristic. By precisely setting the distance, the damping coefficient range can be effectively optimized to reach a relatively high level of 1000 - 100000 N·s / m.

[0073] In an alternative embodiment of the present invention, the distance between the bottom of the first spiral groove 12 and the bottom of the oil groove 10 is less than the distance between the second spiral groove 13 and the bottom of the oil groove 10.

[0074] In this example, the bottom of the first spiral groove 12 is closer to the bottom of the oil groove 10. When the shaft 9 rotates to drive the damping oil to flow, the low-temperature oil can be more quickly and directly introduced from the bottom of the oil groove 10 to the shaft 9 and the ball socket 8. During the operation of the system, the shaft 9 and the ball socket 8 can obtain the cooling of the low-temperature oil more quickly, and a large amount of heat generated by friction can be taken away in time, greatly improving the speed and efficiency of heat exchange.

[0075] The bottom of the first spiral groove 12 is closer to the bottom of the oil groove 10, which changes the flow path and pressure distribution of the damping oil in the spiral groove. Under the combined action of the centrifugal force generated by the rotation of the shaft 9 and the spiral groove structure, this position difference increases the driving force of the oil circulation.

[0076] The reasonable design of the bottom position of the spiral groove effectively avoids the possible short-circuit phenomenon of the oil during the circulation process. If the bottom positions of the first spiral groove 12 and the second spiral groove 13 are too close, it may cause some oil to complete the circulation without sufficient heat exchange, reducing the heat exchange efficiency. The design that the bottom of the first spiral groove 12 is closer to the bottom of the oil groove 10 guides the oil to flow along a more reasonable path, ensuring that each part of the oil can fully participate in the heat exchange process and improving the quality and effect of the oil circulation.

[0077] The above-mentioned damping device of the present invention provides the high stiffness and large damping characteristics required by the flywheel energy storage system. When the flywheel energy storage system passes through the critical speed, the vibration is effectively suppressed, the amplitude is greatly reduced, and the flywheel energy storage system safely passes through the critical speed and operates stably for a long time at the working speed. When the flywheel energy storage system operates at high speed, more heat is generated between the small shaft and the ball socket, and the temperature will rise greatly. Through the design of heat dissipation and cooling measures, the temperature of the damping oil is effectively controlled and maintained within the design requirements, which better ensures the damping characteristics and further improves the stability of the flywheel energy storage system.

[0078] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A damping device, characterized in that: include: A water jacket assembly, wherein an oil tank (10) for accommodating damping oil is provided in the water jacket assembly; A damping body is arranged in the oil groove (10), wherein a first spiral groove (12) is provided through the middle of the damping body, and a second spiral groove (13) is vertically provided on the outer side of the damping body; A damping body base (4) provided at the bottom of the oil tank (10) for supporting the damping body; A ball socket (8) matching the shaft (9) is provided at the top of the first spiral groove (12); Wherein, the water jacket assembly is used to cool the damping oil in the oil tank (10); The spiral direction of the first spiral groove (12) is opposite to the rotation direction of the shaft (9), and is used to guide the low-temperature damping oil at the bottom of the oil groove (10) to the ball socket (8) and the shaft (9) when the shaft (9) rotates; The spiral direction of the second spiral groove (13) is the same as the rotation direction of the shaft (9), and is used to guide the high-temperature damping oil in the upper part of the oil groove (10) to the bottom of the oil groove (10) for cooling when the shaft (9) rotates.

2. The damping device according to claim 1, characterized in that: Also includes: A damping base (1) is arranged at the bottom of the water jacket assembly.

3. The damping device according to claim 2, characterized in that: The water jacket assembly is fixedly connected to the damping base (1) via bolts.

4. The damping device according to claim 1, characterized in that: The water jacket assembly comprises: An inner wall (2) of a water jacket assembly constituting an oil tank (10); A water jacket component housing (3) disposed outside the inner wall (2) of the water jacket component; A water cooling joint (11) provided on the water jacket assembly housing (3); A water jacket of a set width is provided between the water jacket assembly outer shell (3) and the water jacket assembly inner wall (2), and the water cooling joint (11) is used to supply cooling water to the water jacket and discharge warm water.

5. The damping device according to claim 4, characterized in that: A spiral water channel for guiding cooling water is arranged in the water jacket.

6. The damping device according to claim 1, characterized in that: At least two groups of elastic support rods (5) are vertically arranged between the damping body and the damping body base (4).

7. The damping device according to claim 3, characterized in that: There is a set distance between the damping body and the inner wall (2) of the water jacket assembly.

8. The damping device according to claim 1, characterized in that: The first spiral groove (12) and the second spiral groove (13) are T-shaped grooves.

9. The damping device according to claim 1, characterized in that: The damping body comprises: A damping body inner ring (6), wherein the first spiral groove (12) is arranged on the inner wall of the damping body inner ring (6); A damping body outer ring (7) is arranged outside the damping body inner ring (6), and the second spiral groove (13) is arranged on the inner wall of the damping body outer ring (7).

10. The damping device according to claim 1, characterized in that: The distance between the bottom of the first spiral groove (12) and the bottom of the oil groove (10) is smaller than the distance between the second spiral groove (13) and the bottom of the oil groove (10).

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