CN203617834U

CN203617834U - Low-power magnetic suspension flywheel energy storage apparatus

Info

Publication number: CN203617834U
Application number: CN201320470822.7U
Authority: CN
Inventors: 赵旭升; 李剑; 江光灵; 张泉
Original assignee: Nanjing College of Chemical Technology
Current assignee: Nanjing College of Chemical Technology
Priority date: 2013-08-01
Filing date: 2013-08-01
Publication date: 2014-05-28
Anticipated expiration: 2023-08-01

Abstract

The utility model discloses a low-power magnetic suspension flywheel energy storage apparatus, which comprises an energy storage and conversion part, a magnetic suspension supporting part and an auxiliary part, wherein the energy storage and conversion part comprises a flywheel and a motor; the magnetic suspension support part comprises an axial sensor, an upper protection bearing and a lower protection bearing, an axial magnetic bearing, a radial sensor, an upper permanent magnetic force bearing and a lower permanent magnetic force bearing; the auxiliary part comprises a housing and a installation shaft; the axial sensor, the upper protection bearing, the axial magnetic bearing, the radial sensor, the motor, the upper permanent magnetic force bearing, the flywheel, the lower permanent magnetic force bearing and the lower protection bearing are arranged from top to bottom of the installation shaft in series; the installation shafts of the energy storage and conversion part, the magnetic suspension support part and the auxiliary part are sealed inside the housing of the auxiliary part; and the inside of the housing is kept in vacuum state. The apparatus has the advantages of simple structure, high critical rotating speed and low power dissipation, and has a wide application prospect in the fields of electrical network frequency modulation, electrical network safety stabilization control, electric energy quality control and high rating pulse etc.

Description

A kind of low-power consumption magnetic levitation flywheel energy storage device

Technical field

The utility model relates to a kind of energy storage device that a kind of magnetic bearing technology, high-speed electric expreess locomotive and accumulated energy flywheel combine.

Background technology

Energy accumulation device for fly wheel is to drive flywheel High Rotation Speed by motor, electric energy changes a kind of energy storage device that mechanical energy stores into, its have high energy storage density, can be high-power, the advantage such as high density discharges and recharges, and magnetic bearing is applied in energy accumulation device for fly wheel, can realize high rotating speed, low-power consumption, long-life, discharge and recharge the advantages such as number of times does not almost limit, be with a wide range of applications in fields such as national defence, aviation, electric power.But in the flywheel gear of actual motion, bearing power consumption is had to certain requirement, what bearing loss power was less than power of motor just has an engineering practical value below 3%.For reducing bearing power consumption, magnetic bearing can be applied in practice, need extensive employing not produce the PermanentMagneticBearing of power consumption, but Permanent-magnet bearing at least exists one degree of freedom direction unstable in 6 degree of freedom directions, so it can not be separately for supporting rotor, and must combine with other bearing (as electromagnetic bearing, superconducting magnetic bearing system or mechanical bearing) use, this just requires electromagnetic bearing should be also low power operation.

At present, the mode that electromagnetic bearing provides according to magnetic force is divided into following several: the first is active magnetic bearings, in this magnetic bearing coil, there is bias current, so that bias magnetic field to be provided, by control electric current flow through control winding produce control magnetic flux with biasing magnetic flux superpose, thereby produce controlled suspending power, volume, weight and power consumption are all larger.The second is passive magnetic bearing, the suspending power of this magnetic bearing is provided by permanent magnet completely, and its required controller is simple, and suspension power consumption is little, but rigidity and damping are all less, only generally apply in one direction supporting object or alleviate the load acting on traditional bearing.The third is hybrid magnetic bearing, the electromagnet that this magnetic bearing adopts permanent magnetic material to substitute in active magnetic bearings produces bias magnetic field, also claim permanent magnet biased magnetic bearing, the just balanced load that electromagnet provides or the controlling magnetic field of interference, greatly reduce the power loss producing because of bias current, the required number of ampere turns of electromagnet is the half of active magnetic bearings, has dwindled the volume of magnetic bearing, alleviate its weight, and improved bearing capacity.

In existing energy accumulation device for fly wheel, though also there is the bearings mode that adopts magnetic bearing to combine with PermanentMagneticBearing, its general version that adopts active magnetic bearings, power consumption is higher, fails to realize the real low power operation of flywheel gear.

Summary of the invention

The utility model, for existing deficiency, provides a kind of low-power consumption magnetic levitation flywheel energy storage device, can further reduce bearing power consumption.For achieving the above object, the utility model adopts technical scheme to be:

A kind of low-power consumption magnetic levitation flywheel energy storage device, comprises stored energy and transform portion, magnetic suspension support section and slave part, and described stored energy and transform portion comprise flywheel 7, motor 5; Described magnetic suspension support section comprises axial sensor 1, protects bearing 2,9 up and down, axial magnetic bearing 3, radial transducer 4, upper and

lower PermanentMagneticBearing

6,8; Described slave part comprises housing, installation shaft 10; Wherein, axial sensor 1, upper protection bearing 2, axial magnetic bearing 3, radial transducer 4, motor 5, upper PermanentMagneticBearing 6, flywheel 7, lower PermanentMagneticBearing 8 are arranged in the axial direction of installation shaft 10 from top to bottom successively with lower protection bearing 9; the installation shaft 10 of described stored energy and transform portion, magnetic suspension support section and slave part is sealed in the enclosure interior of slave part, and enclosure interior keeps vacuum state.

The stator inner surface of described PermanentMagneticBearing 6,8 mounts annular permanent magnet, and the rotor outer surface of described

PermanentMagneticBearing

6,8 mounts annular permanent magnet.Described PermanentMagneticBearing is inner rotor core, and wherein the axial air-gap of stator and rotor is asymmetric arrangement.

The beneficial effects of the utility model: the utility model is a kind of flywheel gear of vertical placement, the five degree of freedom that utilizes two Permanent Magnet Bearings and permanent-magnetic biased axial magnetic bearing to realize flywheel gear suspends, Permanent Magnet Bearings does not produce power consumption, the permanent magnet biased magnetic bearing of the asymmetric layout of axial air-gap realizes low-power consumption until zero-power operation is minimized the suspension power consumption of whole flywheel gear.This apparatus structure is simple, and critical whirling speed is high, low in energy consumption, has broad application prospects in fields such as electrical network frequency modulation, electricity net safety stable control, quality of power supply control and high power pulses.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Embodiment

The utility model is specifically introduced as follows below in conjunction with drawings and Examples:

lower PermanentMagneticBearing

PermanentMagneticBearing

6,8 mounts annular permanent magnet; Described PermanentMagneticBearing is inner rotor core, and wherein the axial air-gap of stator and rotor is asymmetric arrangement.

Bearing low-power consumption basic functional principle of the present utility model is: vertically place energy accumulation device for fly wheel and utilize two radial permanent magnet bearings and a permanent-magnetic biased axial magnetic bearing to realize five degree of freedom suspension, Permanent-magnet bearing is passive magnetic bearing, do not produce power consumption, just need yet low power operation of permanent-magnetic biased axial magnetic bearing.In the time utilizing permanent-magnetic biased axial magnetic bearing to suspend to flywheel gear, can think that whole flywheel gear is a stable static load, in the time of stable suspersion, in permanent-magnetic biased axial magnetic bearing, need to produce lasting control magnetic flux and remove this static load of balance and stability with the stack of biasing magnetic flux, this just produces certain excitation loss.The excitation power consumption of wanting further to reduce permanent-magnetic biased axial magnetic bearing, need to produce a passive bearing capacity and remove this static load of balance.Achieve this end, while utilizing rotor center that skew occurs, i.e. the asymmetric layout of axial air-gap, has produced corresponding passive bearing capacity in rotor core, and this passive bearing capacity removes balance static load, and the outstanding power consumption of permanent-magnetic biased axial magnetic bearing is significantly reduced.

Below announced the utility model with preferred embodiment, so it is not in order to limit the utility model, and all technical schemes of taking the form that is equal to replacement or equivalent transformation to obtain, within all dropping on protection range of the present utility model.

Claims

1. a low-power consumption magnetic levitation flywheel energy storage device, comprises stored energy and transform portion, magnetic suspension support section and slave part, it is characterized in that:

Described stored energy and transform portion comprise flywheel (7), motor (5); Described magnetic suspension support section comprises axial sensor (1), protects bearing (2,9) up and down, axial magnetic bearing (3), radial transducer (4), upper and lower PermanentMagneticBearing (6,8); Described slave part comprises housing, installation shaft (10); Wherein, axial sensor (1), upper protection bearing (2), axial magnetic bearing (3), radial transducer (4), motor (5), upper PermanentMagneticBearing (6), flywheel (7), lower PermanentMagneticBearing (8) are arranged in the axial direction of installation shaft (10) from top to bottom successively with lower protection bearing (9); the installation shaft (10) of described stored energy and transform portion, magnetic suspension support section and slave part is sealed in the enclosure interior of slave part, and enclosure interior keeps vacuum state.

2. a kind of low-power consumption magnetic levitation flywheel energy storage device according to claim 1, it is characterized in that: described PermanentMagneticBearing (6,8) stator inner surface mounts annular permanent magnet, and the rotor outer surface of described PermanentMagneticBearing (6,8) mounts annular permanent magnet.

3. a kind of low-power consumption magnetic levitation flywheel energy storage device according to claim 1, is characterized in that: described PermanentMagneticBearing is inner rotor core, wherein the axial air-gap of stator and rotor is asymmetric arrangement.