Oil retainer ring structure
By designing an oil baffle ring structure, utilizing a hollow cavity and inclined oil leakage holes, the problem of damping oil being thrown out at high speeds was solved, achieving stable circulation of damping oil and ensuring the safe operation of the flywheel energy storage system.
Patent Information
- Application Number
- CN202520563898.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-28
AI Technical Summary
In a vacuum environment at high speeds, the damping oil in the hydrodynamic bearings of a flywheel energy storage system is easily thrown out, resulting in a reduction in oil volume, which affects heat dissipation and damping characteristics, and may even lead to oil film damage, thereby causing instability of the flywheel rotor system.
An oil baffle ring structure was designed, including a hollow cavity, an inner hole, a first annular groove, and an oil leakage hole. The gap between the inner hole and the shaft is 1-2 mm. The oil leakage hole is inclined in the opposite direction to the rotation direction of the shaft. It is used to guide and drain splashed damping oil to avoid oil reduction.
It effectively suppresses the splashing of damping oil, ensures the stable circulation of damping oil within the system, prevents oil volume reduction, and guarantees the safe operation of the flywheel energy storage system.
Smart Images
Figure CN223754531U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil baffle ring technical field, especially point to a kind of oil baffle ring structure. BACKGROUND
[0002] The liquid dynamic pressure bearing used in flywheel energy storage system has high speed and large viscosity coefficient of damping oil. In vacuum environment, high viscosity damping oil is easy to be thrown out from the damping device at high speed of shaft, thereby reducing the amount of damping oil, affecting heat dissipation, and even affecting damping characteristics. In serious cases, the rapid reduction of damping oil amount leads to oil film breakage, and further causes instability and damage of flywheel rotor system. SUMMARY
[0003] The utility model solves the technical problem to provide a kind of oil baffle ring structure, for damping device, can the oil that is splashed into hollow cavity from damping device is conducted to flow and is arranged back, avoid the reduction of oil amount.
[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: an oil baffle ring structure, comprising:
[0005] a hollow cavity, an inner hole allowing the shaft to pass through is provided in the hollow cavity;
[0006] a first annular groove provided in the hollow cavity for guiding the oil thrown out by the shaft;
[0007] an oil leakage hole provided at the bottom of the hollow cavity for returning the oil guided by the first annular groove.
[0008] Optionally, the oil leakage hole is an inclined hole, and the inclination direction of the inclined hole is opposite to the rotation direction of the shaft.
[0009] Optionally, the oil leakage hole forms an angle of 30°-60° with the horizontal plane.
[0010] Optionally, the bottom of the hollow cavity is further provided with a second annular groove for guiding the oil at the bottom of the hollow cavity.
[0011] Optionally, a first outer wall member and a second outer wall member are provided outside the hollow cavity, the first outer wall member is provided at the top of the second outer wall member, and the cross section of the first outer wall member is larger than that of the second outer wall member.
[0012] Optionally, a sealing groove for placing a sealing ring is concavely provided between the first outer wall member and the second outer wall member.
[0013] Optionally, a bolt hole for bolt fastening is provided on the first outer wall member.
[0014] Optionally, the gap between the inner hole and the shaft is 1-2 mm.
[0015] Optionally, the inner hole bottom is provided with a tapered surface downward.
[0016] Optionally, the angle between the tapered surface and the vertical surface ranges from 30° to 60°.
[0017] The above scheme of the utility model has at least the following beneficial effects:
[0018] The above scheme of the utility model, under the influence of the high linear speed of the shaft outer diameter, the damping oil splashes out from the damping device, by setting the gap between the inner hole and the shaft to 1-2mm, the amount of oil splashing can be inhibited, by setting the hollow cavity for containing the splashed oil, further splashing out of the oil retaining ring structure is avoided, by setting the first annular groove to downwardly flow the oil splashed into the hollow cavity, the oil flowed by the first annular groove is discharged back to the damping device through the oil leakage hole, and the reduction of the oil amount is avoided.
[0019] The oil leakage hole is an inclined hole, the inclined direction of the inclined hole is opposite to the rotation direction of the shaft, the oil in the damping device can be prevented from entering the hollow cavity through the inclined hole, only the oil in the hollow cavity is allowed to return to the damping device, and the reduction of the oil amount is avoided.
[0020] The oil retaining ring structure is installed on the upper end of the damping device in application, the flywheel energy storage system is operated for a long time under the working speed, the damping liquid level does not decrease, the problem that the damping oil splashes out of the damping device is effectively solved, and the safe operation of the system is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is a structure schematic view of the oil retaining ring structure of the utility model.
[0022] Figure 2 It is a position schematic view of the oil leakage hole of the oil retaining ring structure of the utility model.
[0023] MARKS OF THE DRAWINGS:
[0024] 1, tapered surface, 2, inner hole, 3, second annular groove, 4, first annular groove, 5, sealing groove, 6, shaft, 7, oil leakage hole, 8, hollow cavity, 9, first outer wall part, 10, second outer wall part, 11, bolt hole. DETAILED DESCRIPTION
[0025] Exemplary embodiments of the utility model will be described hereinafter in detail with reference to the drawings. Although the exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the utility model can be more thoroughly understood and the scope of the utility model can be completely conveyed to those skilled in the art.
[0026] As Figure 1、 Figure 2 The utility model discloses an oil baffle ring structure, comprising:
[0027] Hollow cavity 8, the inner hole 2 that is provided with in the hollow cavity 8 is passed through and allows the axle 6 to pass through;
[0028] The first annular groove 4 of the oil that is arranged in the hollow cavity 8 is flowed to the shaft 6 and is thrown out;
[0029] The oil that the first annular groove 4 is flowed is arranged in the bottom of hollow cavity 8 and is returned to the oil leakage hole 7.
[0030] Specifically, the oil leakage hole 7 is an inclined hole, the inclined direction of the inclined hole is opposite to the rotation direction of the shaft 6, and the oil leakage hole 7 forms an angle of 30°-60° with the horizontal plane. The gap between the inner hole 2 and the shaft 6 is 1-2 mm.
[0031] In this example, under the influence of the high linear velocity of the outer diameter of the shaft 6, the damping oil splashes out of the damping device, by setting the gap between the inner hole 2 and the shaft 6 to 1-2 mm, the amount of oil splashing can be inhibited, by setting the hollow cavity 8 to accommodate the splashed oil, further splashing of the oil out of the oil baffle ring structure is avoided, by setting the first annular groove 4 to downwardly flow the oil splashed into the hollow cavity 8, the oil flowed by the first annular groove 4 is returned to the damping device through the oil leakage hole 7, and reduction of the oil amount is avoided.
[0032] The oil leakage hole 7 is an inclined hole, the inclined direction of the inclined hole is opposite to the rotation direction of the shaft 6, and the oil leakage hole 7 forms an angle of 30°-60° with the horizontal plane. The gap between the inner hole 2 and the shaft 6 is 1-2 mm.
[0033] The oil baffle ring structure is installed on the upper end of the damping device in application, the flywheel energy storage system is operated for a long time under the working speed, and the damping liquid level does not decrease, so that the problem that the damping oil is thrown out of the damping device is effectively solved, and the safe operation of the system is ensured.
[0034] In an optional embodiment of the utility model, the bottom of the hollow cavity 8 is further provided with a second annular groove 3 for flowing the oil at the bottom of the hollow cavity 8.
[0035] In this example, the second annular groove 3 guides the oil in the damping device, inhibits the fluctuation of the liquid level caused by the high-speed rotation of the shaft 6, makes the liquid level of the damping oil flow along the guidance of the second annular groove 3, and reduces the impact of the liquid level on the bottom of the hollow cavity 8.
[0036] In an optional embodiment of the utility model, the outer ring of the hollow cavity 8 is provided with a first outer wall part 9 and a second outer wall part 10, the first outer wall part 9 is arranged at the top of the second outer wall part 10, and the cross section of the first outer wall part 9 is larger than that of the second outer wall part 10.
[0037] The first outer wall member 9 and the second outer wall member 10 are inwardly recessed with a sealing groove 5 for placing a sealing ring.
[0038] In this example, the oil retaining ring structure and the damping device are gap fitted, in order to avoid the damping oil overflowing from the gap between the oil retaining ring structure and the damping device, a sealing groove 5 for placing a sealing ring is provided, and the sealing ring is installed to effectively play a sealing role.
[0039] After the sealing ring is installed, the oil retaining ring structure is assembled into the upper end of the damping device, and the oil retaining ring structure and the damping device are fastened and connected through bolts.
[0040] In an optional embodiment of the utility model, the inner hole 2 bottom is provided with a downward inclined taper 1. The taper 1 and the vertical plane form an angle in the range of 30°-60°.
[0041] In this example, by providing the downward inclined taper 1, the splashing of the damping oil caused by the high-speed rotation of the shaft 6 outer diameter can be inhibited.
[0042] The above is the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection range of the utility model.
Claims
1. An oil slinger structure, characterized by, The utility model relates to a kind of oil return device of shaft, including: Hollow cavity (8), the inner hole (2) allowing shaft (6) to pass through is provided in the hollow cavity (8); First annular groove (4) is arranged in hollow cavity (8) and guides the oil that shaft (6) is thrown out; Oil drain hole (7) is arranged in the bottom of hollow cavity (8) and returns the oil that first annular groove (4) guides.
2. The oil slinger structure according to claim 1, characterized by, The oil drain hole (7) is inclined hole, and the inclination direction of the inclined hole is opposite to the rotation direction of shaft (6).
3. The oil slinger structure according to claim 2, characterized by, The oil drain hole (7) is 30°-60° angle with horizontal plane.
4. The oil slinger structure according to claim 1, characterized by, The bottom of the hollow cavity (8) is further provided with a second annular groove (3) for guiding the oil on the bottom of the hollow cavity (8).
5. The oil slinger structure of claim 1, wherein The outer ring of the hollow cavity (8) is provided with a first outer wall member (9) and a second outer wall member (10), the first outer wall member (9) is arranged on the top of the second outer wall member (10), and the cross section of the first outer wall member (9) is larger than that of the second outer wall member (10).
6. The oil screen structure according to claim 5, wherein The first outer wall member (9) and the second outer wall member (10) are inwardly recessed between the first outer wall member (9) and the second outer wall member (10) to form a sealing groove (5) for placing a sealing ring.
7. The oil slinger structure of claim 5, wherein The first outer wall member (9) is provided with a bolt hole (11) for bolt fastening.
8. The oil slinger structure of claim 1, wherein The gap between the inner hole (2) and the shaft (6) is 1-2mm.
9. The oil slinger structure of claim 1, wherein The inner hole (2) is provided with a downwardly inclined conical surface (1) at the bottom.
10. The oil slinger structure of claim 9, wherein The angle between the conical surface (1) and the vertical plane is in the range of 30°-60°.