Large-inertia energy storage flywheel rotor
By designing a split flywheel and motor shaft, and using upper and lower shaft heads and inner liner rings, the machining challenges of large-inertia energy storage flywheel rotors after their size and mass increase are solved, achieving high-precision machining and low maintenance costs.
Patent Information
- Application Number
- CN202423092690.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-16
AI Technical Summary
As the size and mass of existing large-inertia energy storage flywheel rotors increase, the manufacturing difficulty increases, the manufacturing accuracy becomes difficult to guarantee, resulting in reduced energy storage capacity and service life, and high maintenance costs.
The design features a split flywheel and motor shaft, which are machined separately and then fastened with interference fit and high-strength bolts. The design of the upper and lower shaft heads and inner liner rings allows for the individual replacement of damaged parts to reduce maintenance costs, and the dynamic balance is adjusted by radial magnetic bearings and sensors.
It reduces processing costs, improves processing accuracy and energy storage capacity, extends service life, reduces maintenance costs, and improves system stability and reliability.
Smart Images
Figure CN223583974U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to flywheel energy storage device technical field, concretely relates to a big inertia energy storage flywheel rotor. BACKGROUND
[0002] Flywheel energy storage device as a new type of environmental protection energy storage frequency modulation device is widely used in industrial production and life because of its high power density, long life, rapid response and other advantages. Flywheel assembly as a capacity carrier is the core component in flywheel energy storage device. With the increase of stored energy, in order to better store energy, the volume and mass of flywheel monomer also need to increase, with the increase of flywheel volume and mass, the structural strength, rotation mode and stability during use of the whole energy storage device change. Especially the overall structure of flywheel rotor, manufacturing process etc. will also face greater challenge and uncertainty.
[0003] Therefore, a flywheel rotor structure suitable for large inertia energy storage is needed to meet the use of large inertia energy storage device. UTILITY MODEL CONTENT
[0004] Therefore, the utility model discloses flywheel and motor shaft are set up in split body, reduce the processing difficulty of flywheel and motor shaft, increase the volume and mass of flywheel, improve the machining precision of flywheel and motor shaft.
[0005] The technical scheme of the utility model is realized as follows: a big inertia energy storage flywheel rotor, including flywheel and motor shaft, the one end of flywheel is connected with the one end of motor shaft, the one end of flywheel is connected with the upper shaft head away from motor shaft, the one end of motor shaft is connected with the lower shaft head away from flywheel, the motor rotor is sleeved on the motor shaft.
[0006] On the basis of above technical scheme, preferably, the upper rotor radial magnetic bearing is sleeved on the flywheel, and the lower rotor radial magnetic bearing is sleeved on the motor shaft.
[0007] On the basis of above technical scheme, preferably, the flywheel connecting shaft is arranged at the one end of flywheel away from motor shaft, the first connecting hole is arranged at the end of flywheel connecting shaft, and the one end of upper shaft head is fixedly arranged in the first connecting hole.
[0008] On the basis of above technical scheme, preferably, the upper inner lining ring is sleeved on the one end of upper shaft head protruding from the first connecting hole.
[0009] On the basis of above technical scheme, preferably, the flywheel connecting shaft is further sleeved with the thrust disc and upper rotor sensor, the thrust disc is fixedly arranged at the end of flywheel connecting shaft and upper shaft head, and the upper rotor sensor is arranged close to the upper rotor radial magnetic bearing.
[0010] Preferably, on the basis of the above technical scheme, the flywheel is provided with a flywheel mounting seat at the end away from the upper shaft head, and the second connecting hole is arranged on the flywheel mounting seat.
[0011] Preferably, on the basis of the above technical scheme, the motor shaft is provided with a motor shaft sleeve, a lower rotor radial magnetic bearing and a lower rotor sensor, the motor shaft sleeve is arranged close to the motor rotor, the lower rotor radial magnetic bearing is arranged close to the motor shaft sleeve, and the lower rotor sensor is arranged close to the lower rotor radial magnetic bearing.
[0012] Preferably, on the basis of the above technical scheme, the end of the motor shaft away from the flywheel is provided with a third fixing hole, and the first end of the lower shaft head is fixedly arranged in the third fixing hole, and the end of the lower shaft head protruding out of the third fixing hole is sleeved with a lower inner lining ring.
[0013] Preferably, on the basis of the above technical scheme, the end of the motor shaft provided with the third fixing hole is sleeved with a lower balance disc.
[0014] Preferably, on the basis of the above technical scheme, the flywheel is provided with a first dovetail groove and a second dovetail groove, the first dovetail groove is arranged on one side of the flywheel, and the second dovetail groove is arranged on the other side of the flywheel.
[0015] The large-inertia energy storage flywheel rotor has the following beneficial effects compared with the prior art:
[0016] The flywheel and the motor shaft are in a split type, are connected through interference after being machined respectively, and are fastened by high-strength bolts, so that the machining cost is reduced, the machining precision cannot be guaranteed due to the large size and mass, the requirements cannot be met in the use process, and the energy storage capacity or the service life is reduced; the end of the flywheel away from the motor shaft is connected with the upper shaft head, and the end of the motor shaft away from the flywheel is connected with the lower shaft head, wherein the upper shaft head is split from the flywheel, can be replaced when damaged due to wear or bending in the use process, and the maintenance cost is reduced; the motor shaft and the lower shaft head are split, can be replaced when damaged due to wear or bending in the use process, and the maintenance cost is reduced; the motor rotor is installed on the motor shaft and cooperates with the motor stator installed on the whole machine to be the source of rotating power. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0018] Fig. 1 It is a sectional view of a large-inertia energy storage flywheel rotor of the utility model;
[0019] Fig. 2 It is a top view of the thrust disc of the utility model;
[0020] Fig. 3 It is a flywheel of the utility model. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0022] As shown in Figs. 1-3 A large-inertia energy storage flywheel rotor, comprising a flywheel 1 and a motor shaft 2, one end of the flywheel 1 is connected with one end of the motor shaft 2, the end of the flywheel 1 away from the motor shaft 2 is connected with an upper shaft head 3, the end of the motor shaft 2 away from the flywheel 1 is connected with a lower shaft head 4, and a motor rotor 6 is sleeved on the motor shaft 2. The flywheel 1 and the motor shaft 2 are in a split type, are connected by interference after being machined respectively, and are fastened by high-strength bolts, which can reduce the machining cost, avoid the failure to guarantee the machining precision due to the large size and mass, cause the failure to meet the requirements in the use process, and cause the reduction of energy storage capacity or service life. The end of the flywheel 1 away from the motor shaft 2 is connected with the upper shaft head 3, and the end of the motor shaft 2 away from the flywheel 1 is connected with the lower shaft head 4, wherein the upper shaft head 3 is split from the flywheel 1, can be replaced when damaged due to wear or bending in the use process, and reduces the maintenance cost. The motor shaft 2 and the lower shaft head 4 are split, can be replaced when the lower shaft head 4 is damaged due to wear or bending in the use process, and reduce the maintenance cost. The motor rotor 6 is installed on the motor shaft 2, cooperates with a motor stator installed on the whole machine, and is the source of rotating power.
[0023] The flywheel 1 is sleeved with an upper rotor radial magnetic bearing 51, and the motor shaft 2 is sleeved with a lower rotor radial magnetic bearing 52. The upper rotor radial magnetic bearing 51 and the lower rotor radial magnetic bearing 52 are mainly used as carriers of axial magnetic bearings and are uniformly provided with threaded holes, so that the dynamic balance of the flywheel 1 can be adjusted by screwing in a locking screw, the whole device is more stable in the rotating process, and the energy storage capacity and reliability are improved.
[0024] The flywheel 1 is provided with a flywheel connecting shaft 11 at the end away from the motor shaft 2, the first connecting hole 12 is arranged at the end of the flywheel connecting shaft 11, and the upper shaft head 3 is fixedly arranged in the first connecting hole 12. The upper shaft head 3 and the first connecting hole 12 are in interference fit, and a screw is usually used for fastening to make the connection more firm.
[0025] The end of the upper shaft head 3 extending out of the first connecting hole 12 is sleeved with an upper lining ring 31, and the upper lining ring 31 is used to improve the wear resistance of the upper shaft head 3. The upper lining ring 31 is usually made of high-hardness alloy and mainly contacts the upper protective bearing, so it has strong wear resistance. When the flywheel 1 is unstable, the upper shaft head 3 can be effectively protected, and only the upper lining ring 31 needs to be replaced, thereby saving cost.
[0026] The flywheel connecting shaft 11 is also sleeved with a thrust disc 71 and an upper rotor sensor 73. The thrust disc 71 is fixedly arranged at the end of the flywheel connecting shaft 11 connected with the upper shaft head 3, and the upper rotor sensor 73 is arranged close to the upper rotor radial magnetic bearing 51. The thrust disc 71 is in clearance fit with the flywheel connecting shaft 11, which facilitates disassembly and maintenance. The flywheel 1 has a dynamic balance function. When the dynamic balance is adjusted, the whole assembly can be adjusted after being assembled, and it is not necessary to disassemble again. Only the appropriate locking screw needs to be screwed into the thrust disc 71 according to the dynamic balance result to change the dynamic balance of the whole assembly. The upper rotor sensor 73 is used to detect the balance position and state of the flywheel 1. The upper rotor sensor 73 is mainly composed of silicon steel sheets and is used in cooperation with the upper displacement sensor installed in the whole machine to detect the position of the upper half.
[0027] The flywheel 1 is provided with a flywheel mounting seat 13 at the end away from the upper shaft head 3, the second connecting hole 14 is arranged on the flywheel mounting seat 13, and the motor shaft 2 is fixedly arranged in the second connecting hole 14.
[0028] The motor shaft 2 is sleeved with a motor shaft sleeve 21, a lower rotor radial magnetic bearing 52 and a lower rotor sensor 74. The motor shaft sleeve 21 is arranged close to the motor rotor 6, the lower rotor radial magnetic bearing 52 is arranged close to the motor shaft sleeve 21, and the lower rotor sensor 74 is arranged close to the lower rotor radial magnetic bearing 52. The lower rotor sensor 74 is used to detect the position of the motor shaft 2, thereby facilitating adjustment of the dynamic balance of the whole assembly. The motor shaft sleeve 21 is installed on the motor shaft 2, and the length thereof can be adjusted by machining. The motor shaft sleeve 21 mainly plays a role in pressing the motor rotor 6 and adjusting the axial position of the lower half assembly. The lower rotor radial magnetic bearing 52 is mainly composed of silicon steel sheets and is used in cooperation with the lower radial magnetic bearing 52 installed in the whole machine to be attracted by the magnetic bearing.
[0029] The end of the motor shaft 2 away from the flywheel 1 is provided with a third fixing hole 22, and the lower shaft head 4 is fixedly arranged in the third fixing hole 22, and the end of the lower shaft head 4 extending out of the third fixing hole 22 is sleeved with a lower lining ring 41. The lower lining ring 41 is installed on the lower shaft head 4 and is made of high-hardness alloy and mainly contacts with the lower protective bearing and has strong wear resistance. When the flywheel 1 is unstable, the lower shaft head 4 can be effectively protected, and only the lower lining ring 41 needs to be replaced, thereby saving cost. The lower shaft head 4 is used for installing the lower lining ring 41 and some other parts of the whole machine.
[0030] The axial magnetic bearing is arranged on the upper and lower surfaces of the thrust disc 71 and mainly used as a carrier of the axial magnetic bearing adsorption, and the peripheral circle of the axial magnetic bearing is uniformly provided with a threaded hole, and the dynamic balance can be adjusted by screwing in a locking screw.
[0031] The end of the motor shaft 2 provided with the third fixing hole 22 is sleeved with a lower balance disc 72. The lower balance disc 72 is installed on the motor shaft 2. Without the lower balance disc 72, the whole system is unstable when rotating due to the existence of the upper half thrust disc 71, and is easy to swing and vibrate, thereby damaging the flywheel 1. The lower balance disc 72 can also press the lower rotor sensor 74 to prevent the axial movement of the lower rotor sensor 74 and affect the detection effect.
[0032] The flywheel 1 is provided with a first dovetail groove 15 and a second dovetail groove 16. The first dovetail groove 15 is arranged on one side of the flywheel 1, and the second dovetail groove 16 is arranged on the other side of the flywheel 1. The first dovetail groove 15 and the second dovetail groove 16 can be installed with customized counterweight blocks for adjusting the dynamic balance of the whole machine.
[0033] The upper rotor radial magnetic bearing 51 is mainly assembled by silicon steel sheets and used for cooperating with the upper radial magnetic bearing installed in the whole machine to be adsorbed by the magnetic bearing. The flywheel 1 is a main energy carrier and is composed of high-strength alloy steel with a yield strength of more than 1000 mpa. Different sizes can be designed to match different energy storage capacities.
[0034] The above only describes the preferred embodiments of the utility model and does not limit the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A large inertia energy storage flywheel rotor comprising a flywheel (1) and a motor shaft (2), the flywheel (1) being connected at one end to one end of the motor shaft (2), characterised in that: The flywheel (1) is connected with an upper shaft head (3) at one end away from the motor shaft (2), the motor shaft (2) is connected with a lower shaft head (4) at one end away from the flywheel (1), and the motor shaft (2) is sleeved with a motor rotor (6).
2. A high-inertia energy storage flywheel rotor as claimed in claim 1, characterised in that: The flywheel (1) is sleeved with an upper rotor radial magnetic bearing (51), and the motor shaft (2) is sleeved with a lower rotor radial magnetic bearing (52).
3. A high-inertia energy reserve flywheel rotor as claimed in claim 2, characterised in that: The flywheel (1) is provided with a flywheel connecting shaft (11) at one end away from the motor shaft (2), the flywheel connecting shaft (11) is provided with a first connecting hole (12) at the end, and the upper shaft head (3) is fixedly arranged in the first connecting hole (12).
4. A high-inertia energy storage flywheel rotor as claimed in claim 3, characterised in that: The upper shaft head (3) is sleeved with an upper lining ring (31) at one end extending out of the first connecting hole (12).
5. A high-inertia energy storage flywheel rotor as claimed in claim 3, characterised in that: The flywheel connecting shaft (11) is further sleeved with a thrust disc (71) and an upper rotor sensor (73), the thrust disc (71) is fixedly arranged at the end of the flywheel connecting shaft (11) connected with the upper shaft head (3), and the upper rotor sensor (73) is arranged close to the upper rotor radial magnetic bearing (51).
6. A high-inertia energy storage flywheel rotor as claimed in claim 3, characterised in that: The flywheel (1) is provided with a flywheel mounting seat (13) at one end away from the upper shaft head (3), the flywheel mounting seat (13) is provided with a second connecting hole (14), and the motor shaft (2) is fixedly arranged in the second connecting hole (14).
7. A high-inertia energy storage flywheel rotor as claimed in claim 1, characterised in that: The motor shaft (2) is sleeved with a motor shaft sleeve (21), a lower rotor radial magnetic bearing (52) and a lower rotor sensor (74), the motor shaft sleeve (21) is arranged close to the motor rotor (6), the lower rotor radial magnetic bearing (52) is arranged close to the motor shaft sleeve (21), and the lower rotor sensor (74) is arranged close to the lower rotor radial magnetic bearing (52).
8. A high-inertia energy storage flywheel rotor as claimed in claim 1, characterised in that: The motor shaft (2) is provided with a third fixing hole (22) at the end away from the flywheel (1), the lower shaft head (4) is fixedly arranged in the third fixing hole (22), and the lower shaft head (4) is sleeved with a lower lining ring (41) at one end extending out of the third fixing hole (22).
9. A high-inertia energy reserve flywheel rotor as claimed in claim 8, characterised in that: The motor shaft (2) is sleeved with a lower balance disc (72) at the end provided with the third fixing hole (22).
10. A high-inertia energy storage flywheel rotor as claimed in claim 1, characterised in that: The flywheel (1) is provided with a first dovetail groove (15) and a second dovetail groove (16), the first dovetail groove (15) is arranged on one side of the flywheel (1), and the second dovetail groove (16) is arranged on the other side of the flywheel (1).