CA1144784A - Safety housing for rotating objects - Google Patents
Safety housing for rotating objectsInfo
- Publication number
- CA1144784A CA1144784A CA000384916A CA384916A CA1144784A CA 1144784 A CA1144784 A CA 1144784A CA 000384916 A CA000384916 A CA 000384916A CA 384916 A CA384916 A CA 384916A CA 1144784 A CA1144784 A CA 1144784A
- Authority
- CA
- Canada
- Prior art keywords
- traveller
- flywheel
- housing
- arrangement
- bearings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/30—Flywheels
- F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
ABSTRACT
A safety housing for a modern high speed rotating flywheel which is designed to dissipate the kinetic energy of the flywheel safely in the event of a catastrophic failure, wherein a coaxially mounted, rotatable and optionally brakable traveller member is interposed between the rotating flywheel and the stationary housing supporting the flywheel. Means for applying a braking torque between the rotating traveller and the stationary housing are provided and can take the form of a mechanical, air, hydraulic or electric brake, or use of an energy dissipating fluid in the space between the housing and the rotating traveller.
A safety housing for a modern high speed rotating flywheel which is designed to dissipate the kinetic energy of the flywheel safely in the event of a catastrophic failure, wherein a coaxially mounted, rotatable and optionally brakable traveller member is interposed between the rotating flywheel and the stationary housing supporting the flywheel. Means for applying a braking torque between the rotating traveller and the stationary housing are provided and can take the form of a mechanical, air, hydraulic or electric brake, or use of an energy dissipating fluid in the space between the housing and the rotating traveller.
Description
This invention rela-tes to a safety housing for a high speed flywheel or the like.
As the cost of petroleum products rises, considerable emphasis is being directed towards alternative energy sources and systems to power modern transportation needs. Systems or energy storage which are particularly suited for transportation needs include those based upon the flywheel. Flywheels are, of course, well known in the art for energy storage purposes and can be generally classified as "traditional" or l'high-technology"
flywheels. The latter classifica-tion includes the so-called "superflywheels" which, in contrast to traditional flywheels which employ high strength, high density materials, rely on super high strength, low density materials operating at speeds of the order of 25,000-35,000 rpm in vacuo. Such flywheels contain a significant amount of kinetic energy ànd should a failure ever occur for any one of a number of predictable reasons tha~ energy must be dissipated without causing damage to the surrounding structures or to persons. It has been calculated that a 50 cm flywheel weighing 105 Kgm running at 12,000 rpm stores 750 Wh (1,991,475 ft-lbs) o energy. It is not unreason-able to assume that such a flywheel would be contained in a casing weighing 245 Kg (in general the ratio of the weight of the flywheel plus saety housing to the weight of th0 flywheel alone is taken to be 2:1). To obtain an idea o the energy available from this flywheel, assume that it is installed in a vehicle having a maximum velocity of 50 Km/hr (i.e~ 31.07 mph =
45.565 ft/secj and that all stored energy would be used to accelerate the vehicle from 0 to 50 Km/hr then, very approxi-mately:
~ .
,, , 7~g~
g 2 1,991,475 ft-lbs where V = 50 hrm = 45.5~5 sfec .......... ...W = 61,773 lbs.
This is equivalent to stating that if the flywheel were brought ~o a sudden stop it could create damage equivalent to a 30 ton bus striking a solid barrier at 30 mph, or a 2 ton car striking that barrier at 122 mph. Unless these effects are inherently limited andfor of predictable and acceptable magnitudes, the system will be unsafeO At an extreme, if the rotating flywheel, due to actual breakage thereof or, more likely, due to a loss of vacuum in the housing, were to be ~nstaneously "welded" to the inside of the housing, then effec-tively infinite forces would be transmitted to the surrounding structure and at the very least the vehicle would perform some acrobatic gyrations in its attempts to dissipate the energy involved. As catastrophic failure of a rotating superflywheel is an event having a finite probability it is apparent that steps must be taken to dissipate the energy safely either by containment, conversion to heat or by controlled deceleration over a relatively long period of time; i.e. by effectively brak-ing the rotating flywheel. Containment effectively implies providing a sufficiently strong and heavy enaugh housing that damage will be minimal. This "brute force" approach, however, adds considerable excess weight to the vehicle and in any event can hardly be guaranteed to protect against a "locking" failure of the flywheel nor does it include an emergency wind down feature.
It is, therefore, an object of the present invention to provide a safety device which may be used to control 78~
deceleration of a rotating flywheel in the even~ of a catastrophic failure thereof.
By one aspect of this invention there is provided in a flywheel arrangement comprising a stationary flywheel housing and a flywheel mounted for rotation within said housing, the improvement comprising:
a traveller member surrounding at least the circumferential rim of said flywheel, coaxially mounted therewith within said housing for rotation relative thereto and normally spaced from said flywheel; and means to apply a braking torque between said stationary housing and said traveller member in the event of an instability in said arrangement such that the rotating said flywheel contacts ! said traveller memher.
The invention will be described in more detail herein-after with reference to the drawings in which:-Figure 1 is a sketch of a typical mounting arrangementfor a super flywheel of the prior art;
Figure 2 is a sketch of a flywheel mounting arrange-ment according to one embodiment of the present invention;
Figure 3 is a sketch of an alternative embodiment ofthe flywheel safety housing of the present invention;
Figure 4 is a sketch of a further embodiment of the flywheel safety housing of the present invention;
Figure 5 shows the arrangement of Figure 4 with an externally pressurized brake; and Figure 6 shows the arrangement of Figure 4 with a pres0t mechanical brake to limit torque.
In the devices of the prior art, as shown in Figure 1 ~ .
:
78~
a flywheel 1 is mounted on a shaft ~ and located within a housing 3 provided with concenkric bearings 4 in which shaft
As the cost of petroleum products rises, considerable emphasis is being directed towards alternative energy sources and systems to power modern transportation needs. Systems or energy storage which are particularly suited for transportation needs include those based upon the flywheel. Flywheels are, of course, well known in the art for energy storage purposes and can be generally classified as "traditional" or l'high-technology"
flywheels. The latter classifica-tion includes the so-called "superflywheels" which, in contrast to traditional flywheels which employ high strength, high density materials, rely on super high strength, low density materials operating at speeds of the order of 25,000-35,000 rpm in vacuo. Such flywheels contain a significant amount of kinetic energy ànd should a failure ever occur for any one of a number of predictable reasons tha~ energy must be dissipated without causing damage to the surrounding structures or to persons. It has been calculated that a 50 cm flywheel weighing 105 Kgm running at 12,000 rpm stores 750 Wh (1,991,475 ft-lbs) o energy. It is not unreason-able to assume that such a flywheel would be contained in a casing weighing 245 Kg (in general the ratio of the weight of the flywheel plus saety housing to the weight of th0 flywheel alone is taken to be 2:1). To obtain an idea o the energy available from this flywheel, assume that it is installed in a vehicle having a maximum velocity of 50 Km/hr (i.e~ 31.07 mph =
45.565 ft/secj and that all stored energy would be used to accelerate the vehicle from 0 to 50 Km/hr then, very approxi-mately:
~ .
,, , 7~g~
g 2 1,991,475 ft-lbs where V = 50 hrm = 45.5~5 sfec .......... ...W = 61,773 lbs.
This is equivalent to stating that if the flywheel were brought ~o a sudden stop it could create damage equivalent to a 30 ton bus striking a solid barrier at 30 mph, or a 2 ton car striking that barrier at 122 mph. Unless these effects are inherently limited andfor of predictable and acceptable magnitudes, the system will be unsafeO At an extreme, if the rotating flywheel, due to actual breakage thereof or, more likely, due to a loss of vacuum in the housing, were to be ~nstaneously "welded" to the inside of the housing, then effec-tively infinite forces would be transmitted to the surrounding structure and at the very least the vehicle would perform some acrobatic gyrations in its attempts to dissipate the energy involved. As catastrophic failure of a rotating superflywheel is an event having a finite probability it is apparent that steps must be taken to dissipate the energy safely either by containment, conversion to heat or by controlled deceleration over a relatively long period of time; i.e. by effectively brak-ing the rotating flywheel. Containment effectively implies providing a sufficiently strong and heavy enaugh housing that damage will be minimal. This "brute force" approach, however, adds considerable excess weight to the vehicle and in any event can hardly be guaranteed to protect against a "locking" failure of the flywheel nor does it include an emergency wind down feature.
It is, therefore, an object of the present invention to provide a safety device which may be used to control 78~
deceleration of a rotating flywheel in the even~ of a catastrophic failure thereof.
By one aspect of this invention there is provided in a flywheel arrangement comprising a stationary flywheel housing and a flywheel mounted for rotation within said housing, the improvement comprising:
a traveller member surrounding at least the circumferential rim of said flywheel, coaxially mounted therewith within said housing for rotation relative thereto and normally spaced from said flywheel; and means to apply a braking torque between said stationary housing and said traveller member in the event of an instability in said arrangement such that the rotating said flywheel contacts ! said traveller memher.
The invention will be described in more detail herein-after with reference to the drawings in which:-Figure 1 is a sketch of a typical mounting arrangementfor a super flywheel of the prior art;
Figure 2 is a sketch of a flywheel mounting arrange-ment according to one embodiment of the present invention;
Figure 3 is a sketch of an alternative embodiment ofthe flywheel safety housing of the present invention;
Figure 4 is a sketch of a further embodiment of the flywheel safety housing of the present invention;
Figure 5 shows the arrangement of Figure 4 with an externally pressurized brake; and Figure 6 shows the arrangement of Figure 4 with a pres0t mechanical brake to limit torque.
In the devices of the prior art, as shown in Figure 1 ~ .
:
78~
a flywheel 1 is mounted on a shaft ~ and located within a housing 3 provided with concenkric bearings 4 in which shaft
2 is journalled. In the embodiment shown the shaft is supported at both ends but may equally well be supported at one end in a cantile~Jer manner. Seals 5 are provided around shaft 2, in order that a vacuum may be maintained within housing
3. The housing 3 is provided with a circumferential containment ring 6 of relatively heavy section in order to provide a measure of safety in the e~ent of flywheel failure. Failure of the fly-wheel may occur in several ways, the most likely of which isloss of vacuum in the housing in which case friction would cause the flywheel to heat up and possibly destroy the resin bonding the high strength Kevlar~ filaments together with the result that some filaments would shred and form a fluff which wedges between the flywheel and the housing~ thus effectively forming a brake shoe. It is known that, in such a situatlon (see "Popular Science, Oct. 1980, p. 83), this "fluff" can halt the flywheel in under two seconds. Other failure modes include imbalance in the flywheel due, perhaps, to some inhomogenity in the material or to creep, which causes the flywheel to touch the casing, and physical disintegration of -the flywheel and perhaps fragmentation of at least a portion of the rim under the centrifugal loads applied.
In order to minimize these problems it is proposed, according to the present invention, to interpose a second mov-able part between the rotating flywheel and the stationary housing such that although the effects occuring between the flywheel and the secon~ movable part may at times be unpredict-able, the resultant interactions with the external or stationary
In order to minimize these problems it is proposed, according to the present invention, to interpose a second mov-able part between the rotating flywheel and the stationary housing such that although the effects occuring between the flywheel and the secon~ movable part may at times be unpredict-able, the resultant interactions with the external or stationary
- 4 -,: . , ~ ~47~3~
housing will be predictable, limited and even, if desirea, controllable. The intermediate moving part between the rotating flywheel and the stationary housing may be designed so as i) to limit torques transmitted to the stationary housing, ii) to be able to act, either inherently or automatically to apply torques acceptable to the stationary housing to decelerate the moving flywheel, or to accomplish this with the aid of an external control, either instantaneous or continuous, or both: iii) to act to limit any other f]ywheel speed related forces or torques transmitted to the stationary housing, by acting to reduce the speed of the flywheel if any of such speed related effects tend to exceed safe levels; iv) to act to limit geometry-related or geometry-and speed related effects such as centrifugal forces due to imbalance due to distortion of the rotor - by at least one of: restraining the geometry (i.e. containing the shape of a failing rotor); and acting to reduce the speed of the rotor if a change in geometry is detected (i.e. by a wobble or radial dimensional increase or a c.g. o~fset or force due to i~alance).
In its simplest form, the present invention comprises merely three essential elements, as illustrated in Figure 2, namely a flywheel or rotor 21 mounted on a shaft 22 ~ournalled on bearings 24 at each end thereof, or cantilevered from one end if desired, within a housing 23. Seals 2~ help maintain a vacuum within housing 23, in precisely the same manner as that described with reference to the prior art device of Figure l. Intermediate the rotor 21 and housing or stator 23, there is provided a traveller or collar 26, concentricalLly mounted with rotor 21 for rotation relative to housing 23, such that different torques may be applied ~etween rotor 21 and :
7~
traveller 26, and between traveller ~6 and stator 23 with the latter being limited to a safe value. If the rotor 21 should expand or wobble excessi~ely it would start to rub against the traveller 26 which thus acts to restrain geometry changes. If these become excessive, or rubbing forces were excessive, the traveller 26 will slip relative to stator 23. In the process the peak torques would be reduced and if the friction force between traveller 26 and stator 23 is controlled, a maximum value may be established. In this embodiment the traveller 26 acts as a containment ringl i.e. resists large radial break up forces, but it should be noted that this system is not amenable to large increases in deceleration times or to precise control.
- An alternative arrangement is illustrated in Figure 3, showing a double ended shaft 32 supportlng a flywheel 31, although a cantilever configuration is equally applicable. The shaft 32 is ~ournalled in bearings 34 at each end thereof, which bearings are carried on a concentrically mounted traveller 36.
Traveller 3~ is shaped to con~orm to the shape of rotor 31 with a relatively narrow free space 37 therebetween. Traveller 36 is journalled in concentric bearings 38 carried in stator hous-ing 33. Generally free space, 37 is a vacuum space and a vacuum may also be maintained in housing space 39, and the bearings 34, 38 are sealed by seals tnot shown). Rotation of rotor 31 in bearings 34 will generally be accompanied by as little energy dissipation as possible, but should any failure of rotor 31 take place so that a part thereof touches normally stationary traveller 36, as hereinbefore~escribed, the traveller 36 will rotate in bearings 38 with maximum dissipation of energy.
Such dissipation may be effected in sevexal ways such as by a .~44'7~3~
controllable brake between stator 33 and traveller 36, pre~et torque bearings 38 or incorporation o~ ~n energy absorbing fluid in space 39, as illustrated in Fi`gures 4, 5 and 6.
Figure 4 illustrates the use of an energy dissipat-ing fluid, such as a foam or water introduced in space 4g.
Various fluids of different viscosities may be used to dissipate the energy of the rotor and absorb i`t as heat. Radial vanes or fins 50 may be incorporated on traveller 46 in order to increase resistance.
Figure 5 illustrates the use of an externally pressurized brake 51 to apply a braking force between the stator and traveller. The brake could be an air brake, electric brake, or hydraulic brake as desired~
Figure 6 illustrates a brake arrangement 61 in which the bearings 68 are fabricated in a brake pad material and pre-loaded to a selected braking torque by means of spri`ngs 63.
Although not illustrated it will be appreci`ated that known detection devices can readily be incorporated into the flywheel and/or the traveller to detect the onset of any instability such as wobble or insipient breakdown of the fly-wheel, and produce an output signal which can be used to trigger the application of the braking torque.
housing will be predictable, limited and even, if desirea, controllable. The intermediate moving part between the rotating flywheel and the stationary housing may be designed so as i) to limit torques transmitted to the stationary housing, ii) to be able to act, either inherently or automatically to apply torques acceptable to the stationary housing to decelerate the moving flywheel, or to accomplish this with the aid of an external control, either instantaneous or continuous, or both: iii) to act to limit any other f]ywheel speed related forces or torques transmitted to the stationary housing, by acting to reduce the speed of the flywheel if any of such speed related effects tend to exceed safe levels; iv) to act to limit geometry-related or geometry-and speed related effects such as centrifugal forces due to imbalance due to distortion of the rotor - by at least one of: restraining the geometry (i.e. containing the shape of a failing rotor); and acting to reduce the speed of the rotor if a change in geometry is detected (i.e. by a wobble or radial dimensional increase or a c.g. o~fset or force due to i~alance).
In its simplest form, the present invention comprises merely three essential elements, as illustrated in Figure 2, namely a flywheel or rotor 21 mounted on a shaft 22 ~ournalled on bearings 24 at each end thereof, or cantilevered from one end if desired, within a housing 23. Seals 2~ help maintain a vacuum within housing 23, in precisely the same manner as that described with reference to the prior art device of Figure l. Intermediate the rotor 21 and housing or stator 23, there is provided a traveller or collar 26, concentricalLly mounted with rotor 21 for rotation relative to housing 23, such that different torques may be applied ~etween rotor 21 and :
7~
traveller 26, and between traveller ~6 and stator 23 with the latter being limited to a safe value. If the rotor 21 should expand or wobble excessi~ely it would start to rub against the traveller 26 which thus acts to restrain geometry changes. If these become excessive, or rubbing forces were excessive, the traveller 26 will slip relative to stator 23. In the process the peak torques would be reduced and if the friction force between traveller 26 and stator 23 is controlled, a maximum value may be established. In this embodiment the traveller 26 acts as a containment ringl i.e. resists large radial break up forces, but it should be noted that this system is not amenable to large increases in deceleration times or to precise control.
- An alternative arrangement is illustrated in Figure 3, showing a double ended shaft 32 supportlng a flywheel 31, although a cantilever configuration is equally applicable. The shaft 32 is ~ournalled in bearings 34 at each end thereof, which bearings are carried on a concentrically mounted traveller 36.
Traveller 3~ is shaped to con~orm to the shape of rotor 31 with a relatively narrow free space 37 therebetween. Traveller 36 is journalled in concentric bearings 38 carried in stator hous-ing 33. Generally free space, 37 is a vacuum space and a vacuum may also be maintained in housing space 39, and the bearings 34, 38 are sealed by seals tnot shown). Rotation of rotor 31 in bearings 34 will generally be accompanied by as little energy dissipation as possible, but should any failure of rotor 31 take place so that a part thereof touches normally stationary traveller 36, as hereinbefore~escribed, the traveller 36 will rotate in bearings 38 with maximum dissipation of energy.
Such dissipation may be effected in sevexal ways such as by a .~44'7~3~
controllable brake between stator 33 and traveller 36, pre~et torque bearings 38 or incorporation o~ ~n energy absorbing fluid in space 39, as illustrated in Fi`gures 4, 5 and 6.
Figure 4 illustrates the use of an energy dissipat-ing fluid, such as a foam or water introduced in space 4g.
Various fluids of different viscosities may be used to dissipate the energy of the rotor and absorb i`t as heat. Radial vanes or fins 50 may be incorporated on traveller 46 in order to increase resistance.
Figure 5 illustrates the use of an externally pressurized brake 51 to apply a braking force between the stator and traveller. The brake could be an air brake, electric brake, or hydraulic brake as desired~
Figure 6 illustrates a brake arrangement 61 in which the bearings 68 are fabricated in a brake pad material and pre-loaded to a selected braking torque by means of spri`ngs 63.
Although not illustrated it will be appreci`ated that known detection devices can readily be incorporated into the flywheel and/or the traveller to detect the onset of any instability such as wobble or insipient breakdown of the fly-wheel, and produce an output signal which can be used to trigger the application of the braking torque.
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a flywheel arrangement comprising a stationary flywheel housing and a flywheel mounted for rotation within said housing, the improvement comprising:
a traveller member surrounding at least the circumferential rim of said flywheel, coaxially mounted therewith within said housing for rotation relative thereto and normally spaced from said flywheel; and means to apply a braking torque between said stationary housing and said traveller member in the event of an instability in said arrangement such that the rotating said flywheel contacts said traveller member.
a traveller member surrounding at least the circumferential rim of said flywheel, coaxially mounted therewith within said housing for rotation relative thereto and normally spaced from said flywheel; and means to apply a braking torque between said stationary housing and said traveller member in the event of an instability in said arrangement such that the rotating said flywheel contacts said traveller member.
2. The arrangement as claimed in claim 1 wherein said flywheel is journalled for rotation in bearings in said housing.
3. The arrangement as claimed in claim 1 wherein said traveller surrounds said flywheel and is journalled for rotation in bearings in said housing.
4. The arrangement as claimed in claim 3 wherein said flywheel is journalled for rotation in bearings in said traveller.
5. The arrangement as claimed in claim 2, 3 or 4 wherein said bearings are sealed bearings whereby a vacuum may be main-tained between said flywheel and at least one of said traveller and said housing.
6. The arrangement as claimed in claim 1 wherein said traveller member comprises a containment ring slidably rotatable against said housing, whereby friction between said ring and said housing provides said braking torque.
7. The arrangement as claimed in claim 3 or 4 including a fluid contained between said housing means and said traveller member to dissipate kinetic energy transmitted to said traveller in said event.
8. The arrangement as claimed in claim 3 or 4 including a fluid contained between said housing means and said traveller member and vane means on said traveller member for cooperating with said vane means to dissipate kinetic energy transmitted to said traveller in said event.
9. The arrangement as claimed in claim 3 or 4 wherein said bearings for said traveller include brake means to apply said braking torque.
10. The arrangement as claimed in claim 3 or 4 wherein said bearings for said traveller include a spring loaded brake means preset to apply a selected said braking torque.
11. The arrangement as claimed in claim 3 or 4 wherein said bearings for said traveller include externally pressurized brake means arranged to apply said braking torque.
12. The arrangement as claimed in claim 1, 2 or 3 including means to detect said instability and trigger said braking torque in response thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000384916A CA1144784A (en) | 1981-08-31 | 1981-08-31 | Safety housing for rotating objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000384916A CA1144784A (en) | 1981-08-31 | 1981-08-31 | Safety housing for rotating objects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1144784A true CA1144784A (en) | 1983-04-19 |
Family
ID=4120840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000384916A Expired CA1144784A (en) | 1981-08-31 | 1981-08-31 | Safety housing for rotating objects |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1144784A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0221495A1 (en) * | 1985-10-31 | 1987-05-13 | Mitsubishi Denki Kabushiki Kaisha | Flywheel device |
| EP0351488A2 (en) * | 1988-07-18 | 1990-01-24 | Westinghouse Electric Corporation | Canned pump having a high inertia flywheel |
| EP0695869A1 (en) | 1991-06-11 | 1996-02-07 | S.I.T.I. S.p.A. Società Impianti Termoelettrici Industriali | Device for feeding pressurized liquid to a hydraulic circuit |
| US5720205A (en) * | 1995-12-15 | 1998-02-24 | Harrington; David | Viscous torsional vibration damper with multi-component housing weldment |
| EP1426653A1 (en) * | 2001-08-24 | 2004-06-09 | Tamura Electric Works, Ltd. | Loss reducing device of rotary body |
| GB2449282A (en) * | 2007-05-17 | 2008-11-19 | Flybrid Systems Llp | High speed flywheel containment |
| GB2459110A (en) * | 2008-04-10 | 2009-10-14 | Flybrid Systems Llp | Flywheel containment |
| EP2554442A1 (en) * | 2011-08-01 | 2013-02-06 | Spicer Off-Highway Belgium N.V. | Apparatus for braking flywheel systems and method for dissipating energy stored therein |
| US8622860B2 (en) | 2011-08-01 | 2014-01-07 | Spicer Off-Highway Belgium N.V. | Method and apparatus for transferring power between a flywheel and a vehicle |
| CN109563906A (en) * | 2016-06-02 | 2019-04-02 | S4能源公司 | Fly wheel system |
-
1981
- 1981-08-31 CA CA000384916A patent/CA1144784A/en not_active Expired
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0221495A1 (en) * | 1985-10-31 | 1987-05-13 | Mitsubishi Denki Kabushiki Kaisha | Flywheel device |
| US4819502A (en) * | 1985-10-31 | 1989-04-11 | Mitsubishi Denki Kabushiki Kaisha | Flywheel device |
| EP0351488A2 (en) * | 1988-07-18 | 1990-01-24 | Westinghouse Electric Corporation | Canned pump having a high inertia flywheel |
| EP0351488A3 (en) * | 1988-07-18 | 1990-09-05 | Westinghouse Electric Corporation | Canned pump having a high inertia flywheel |
| EP0695869A1 (en) | 1991-06-11 | 1996-02-07 | S.I.T.I. S.p.A. Società Impianti Termoelettrici Industriali | Device for feeding pressurized liquid to a hydraulic circuit |
| US5720205A (en) * | 1995-12-15 | 1998-02-24 | Harrington; David | Viscous torsional vibration damper with multi-component housing weldment |
| EP1426653A1 (en) * | 2001-08-24 | 2004-06-09 | Tamura Electric Works, Ltd. | Loss reducing device of rotary body |
| EP1426653A4 (en) * | 2001-08-24 | 2005-10-12 | Tamura Electric Works Ltd | Loss reducing device of rotary body |
| GB2449282A (en) * | 2007-05-17 | 2008-11-19 | Flybrid Systems Llp | High speed flywheel containment |
| GB2449282B (en) * | 2007-05-17 | 2009-07-01 | Flybrid Systems Llp | High speed flywheel containment |
| US8234953B2 (en) | 2007-05-17 | 2012-08-07 | Flybrid Systems Llp | High speed flywheel containment |
| GB2459110A (en) * | 2008-04-10 | 2009-10-14 | Flybrid Systems Llp | Flywheel containment |
| GB2459110B (en) * | 2008-04-10 | 2010-03-03 | Flybrid Systems Llp | High speed flywheel |
| EP2554442A1 (en) * | 2011-08-01 | 2013-02-06 | Spicer Off-Highway Belgium N.V. | Apparatus for braking flywheel systems and method for dissipating energy stored therein |
| US8622860B2 (en) | 2011-08-01 | 2014-01-07 | Spicer Off-Highway Belgium N.V. | Method and apparatus for transferring power between a flywheel and a vehicle |
| CN109563906A (en) * | 2016-06-02 | 2019-04-02 | S4能源公司 | Fly wheel system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |