CN205388095U - Electromagnetism makes active dynamic pressure gas bearing of ability - Google Patents
Electromagnetism makes active dynamic pressure gas bearing of ability Download PDFInfo
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- CN205388095U CN205388095U CN201620168863.4U CN201620168863U CN205388095U CN 205388095 U CN205388095 U CN 205388095U CN 201620168863 U CN201620168863 U CN 201620168863U CN 205388095 U CN205388095 U CN 205388095U
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- 239000011888 foil Substances 0.000 claims abstract description 91
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- 239000000523 sample Substances 0.000 claims description 4
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- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
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- 239000007921 spray Substances 0.000 claims description 3
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model provides an electromagnetism makes active dynamic pressure gas bearing of ability, including electromagnetic bearing (1) and nested elastic foil bearing (3) between electromagnetic bearing (1) and rotor shaft (2), its characterized in that, elastic foil bearing (3) including top layer elastic foil (31) and bottom elastic foil (32), top layer elastic foil (31) be non - magnetic materials, have a plurality of independent magnetic material separately regional at top layer elastic foil's (31) surface distribution. The utility model discloses an electromagnetism makes active dynamic pressure gas bearing of ability simple structure, required precision are not high, adopt gas magnetism hybrid bearing structure, have flat paillon foil of adjustable magnetism and low -cost pressure sensor, have solved current dynamic pressure gas bearing at work, and the low -speed bearing capacity of existence is low, the bearing disturbance is eccentric and make lubricated air current leak and the unmanageable problem.
Description
Technical field
This utility model belongs to high speed oil-free lubrication support apparatus technical field, particularly to the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism enables.
Background technology
Electromagnetic bearing is to utilize electromagnetic force make rotor stability suspend and can be controlled a kind of bearing of its shaft core position by control system, generally also can be described as electromagnetic bearing or magnetic suspension bearing, type the most frequently used in prior art is Active Magnetic Suspending Bearing (AMB).Electromagnetic bearing is that to utilize the effect of magnetic force be that rotating shaft is suspended in space ad-hoc location, it is achieved the effect of traditional bearing, and he avoids directly contact of rotor and bearing, without lubrication with seal, it is possible to abrasion, reduction power consumption are completely eliminated；It has controllability, it is possible to the position of rotor is carried out actively control, and can be adjusted rigidity and the damping of bearing by control system；Electromagnetic bearing also has the advantage such as life-span length, big, the autobalance of operating temperature range.Magnetic bearing system is made up of rotor, sensor, controller and executor four major part, and wherein actuator includes electric magnet and power amplifier etc..
Development from magnetic bearing self, there is also many defects, all core datas such as magnetic bearing operating both are from the position in rotor with response, but the existing sensor for determining rotor reference position is generally susceptible to the interference of the ferromagnetic field of proximity electromagnetic, the mistake of sensor signal is often the main cause causing magnetic bearing burst damage property fault；Due to the reason such as magnetic saturation and electromagnetic heating of material, the bearing capacity of electromagnetic bearing is limited.
Gas bearing is one comparatively ripe in suspension bearing technology, has good adaptivity, it is possible to the longtime running when high temperature, high speed and high pollution, it is not necessary to feed lubrication, therefore simple in construction.Adopting gas as lubricant medium, therefore its bearing capacity under rotor low-speed running state is relatively low, and damping and rigidity also compare relatively low, cause hot stopping performance poor；It addition, start and the stage of shutdown, gas bearing, due to the rotating speed decline when rotor start and stop, causes when axle internal gas pressure deficiency, support force are inadequate, can cause that inevitably abrasion occurs in bearing.The jerk car of gas bearing or rapid starting/stopping are required for extra source of the gas and assist under normal conditions, and often repeat start-stop once, are all bound to correspondingly lose a certain amount of service life, cause the decline of reliability simultaneously；Owing to gas bearing is all very high to the machining accuracy of structure and the requirement of material, so limiting application and the development of gas bearing, be its cannot low cost, with high reliability spread to industry-by-industry application in one of the main reasons.
Gas magnetic combined bearing of the prior art substantially simply adds another set of complete magnetic bearing and at magnetic bearing on the 26S Proteasome Structure and Function basis of the hydrostatic gas-lubricated bearing of complete set, and usual this way can only to improve rotating accuracy purpose.Therefore its feature such as production maintenance cost and structural complexity to be substantially increased on the contrary so that it is be only high price concept prototype under lab, it is impossible to large-scale industrial application.
For making up the deficiency of existing gas magnetic combined bearing, wish a kind of new gas magnetic combined bearing, the work of its magnetic bearing is mainly used in the reference position between calibration bearing and rotor, the vibrations that cause when gas bearing quality or precision are not good or from extraneous disturbance make " the touching wall " of rotor and shaft room to be about to occur time, on one's own initiative rotor can be drawn return by magnetic bearing, avoid the generation that between centers contacts, prevent " seizing " accident.Low cost sensor can be adopted, reduce electromagnetism electric disturbance, improve control efficiency.The damping to magnetic bearing system, rigidity, bearing capacity can be improved on the one hand, the unmanageable shortcoming of gas bearing can be overcome again on the other hand.
Utility model content
Utility model purpose of the present utility model is to provide the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism enables, its simple in construction, required precision are not high, adopt gas magnetic combined bearing structure, there is the pressure transducer of the flat paillon foil of adjustable magnetic and low cost, solving existing hydrodynamic gas-lubricated bearing at work, the low speed low bearing capacity that exists, bearing disturbance are eccentric and make lubrication flow leakage and unmanageable problem.
Concrete technical scheme of the present utility model is the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism enables, including electromagnetic bearing and be nested in the elastic foil bearing between electromagnetic bearing and armature spindle, it is characterized in that, described elastic foil bearing includes top layer compliant foil and bottom compliant foil, described top layer compliant foil is non-magnet material, and the surface distributed at top layer compliant foil has multiple each independent magnetic material region.
Further, described magnetic material region is strip magnetic material region or point-like magnetic material region, multiple strip magnetic material regions or point-like magnetic material region are uniformly distributed, and the length direction in described strip magnetic material region is parallel with the axis direction of armature spindle.
Further, described top layer compliant foil is flat paillon foil, and described bottom compliant foil is ripple paillon foil, and described flat paillon foil is made up of the stainless steel band of non-magnet material, after the surface of top layer compliant foil hides and sprays multiple each independent magnetic material regions, cover with ceramic coating.
Further, also include elastic foil bearing seat, bear box and pressure transducer, described electromagnetic bearing is between elastic foil bearing seat and bear box, described elastic foil bearing seat is used for installing bottom layer compliant foil, and the probe of described pressure transducer is used for measuring the gas pressure at bottom compliant foil place through elastic foil bearing seat.
Further, also include left end cap and right end cap, described electromagnetic bearing includes magnetic pole and the coil being wrapped on magnetic pole, described magnetic pole has multiple, it is arranged between elastic foil bearing seat and bear box, the even cloth of circumference along gas bearing, the axis of armature spindle is pointed in one end of described magnetic pole, described left end cap and right end cap are positioned at elastic foil bearing seat and bear box two ends, are compressed by magnetic pole.
Further, described pressure transducer has 8, is positioned at the middle part of gas bearing, the even cloth of circumference along gas bearing, and described magnetic pole has 8, and each magnetic pole is that silicon steel plate stacking forms.
Further, the material of described elastic foil bearing seat, left end cap and right end cap is duralumin material.
The beneficial effects of the utility model be electromagnetism of the present utility model enable active hydrodynamic gas-lubricated bearing compared with prior art, have the advantage that
1) top foil is provided with multiple magnetic material region, top foil appropriateness is made to deform by the attraction of the magnetic pole of electromagnetic bearing, improve the maximum pressure of lubrication air film side in bearing and prevent lubrication flow leakage, improve rotor and resist the ability being hit wall by disturbance bias, thus also improving the bearing capacity of bearing；
2) adopt lower-cost pressure transducer to gather gas pressure change, controlled the deformation of top foil by simple control law, it is possible to provide relatively high rotor damping, and improve rotor stability.Simplifying under control such, bearing machining required precision is not high；
3) electromagnetic bearing adopts nested parallel structure with gas bearing, shortens the axial length of gas magnetic bearing, simplifies structure, and integrated level is high, improves the combination property of bearing；
4) electromagnetic bearing and gas bearing collaborative work, improve bearing dynamic property under the state of running up and stability；
5) bearing is when low speed, and dynamic pressure air film, along not setting up, makes rotor floating with electromagnetic bearing, improves the low-speed performance of gas bearing；
Gas bearing structure of the present utility model is simple, and easy and simple to handle, required precision is not high, practical, and Financial cost is low.
Accompanying drawing explanation
Fig. 1 is the front view of the active hydrodynamic gas-lubricated bearing that electromagnetism of the present utility model enables；
Fig. 2 is A-A sectional view in Fig. 1；
Fig. 3 is B enlarged drawing in Fig. 2；
The top foil with strip magnetic material that Fig. 4 is the active hydrodynamic gas-lubricated bearing that electromagnetism of the present utility model enables launches schematic diagram；
The top foil with point-like magnetic material that Fig. 5 is the active hydrodynamic gas-lubricated bearing that electromagnetism of the present utility model enables launches schematic diagram；
Fig. 6 is the top foil deformation schematic diagram of the active hydrodynamic gas-lubricated bearing that electromagnetism of the present utility model enables.
Detailed description of the invention
Below in conjunction with Figure of description, the technical solution of the utility model is further described.
As shown in Figure 1-2, the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism of the present utility model enables, including electromagnetic bearing 1, the elastic foil bearing 3 being nested between electromagnetic bearing 1 and armature spindle 2, elastic foil bearing seat 4, bear box 5, pressure transducer 6, left end cap 7 and right end cap 8, it is characterized in that, described elastic foil bearing 3 includes top layer compliant foil 31 and bottom compliant foil 32, described top layer compliant foil 31 is non-magnet material, and the surface distributed at top layer compliant foil 31 has multiple each independent magnetic material region.
Described electromagnetic bearing 1 is between elastic foil bearing seat 4 and bear box 5, described elastic foil bearing seat 4 is for installing bottom layer compliant foil 32, and the probe of described pressure transducer 6 is used for measuring the gas pressure at bottom compliant foil 32 place through elastic foil bearing seat 4.Described pressure transducer 6 has 8, is positioned at the middle part of gas bearing, the even cloth of circumference along gas bearing.Described pressure transducer 6 includes pressure transducer lid 61 and pressure transducer probe 62.
Described electromagnetic bearing 1 includes magnetic pole 11 and the coil 12 being wrapped on magnetic pole 11, and described magnetic pole 11 has 8, and each magnetic pole 11 forms for silicon steel plate stacking.Magnetic pole 11 is arranged between elastic foil bearing seat 4 and bear box 5, the even cloth of circumference along gas bearing, the axis of armature spindle 2 is pointed in one end of described magnetic pole 11, and described left end cap 7 and right end cap 8 are positioned at elastic foil bearing seat 4 and bear box 5 two ends, are compressed by magnetic pole 11.
The material of described elastic foil bearing seat 4, left end cap 7 and right end cap 8 is nonmagnetic duralumin material.
As illustrated in figures 4-5, the magnetic material region of the surface distributed of described top layer compliant foil 31 is strip magnetic material region or point-like magnetic material region, multiple strip magnetic material regions or point-like magnetic material region are uniformly distributed, and the length direction in described strip magnetic material region is parallel with the axis direction of armature spindle 2.If whole top layer compliant foil 31 is completely covered magnetic material, then when magnetic force the be controlled by complexity of reducer thin plate stressing conditions can be significantly increased.If top layer compliant foil 31 is flexible not enough, then the curvature problem with dynamic deformation easily occurs.
Described top layer compliant foil 31 is flat paillon foil, described bottom compliant foil 32 is ripple paillon foil, described flat paillon foil is made up of the stainless steel band of non-magnet material, after the surface of top layer compliant foil 31 hides and sprays multiple each independent magnetic material regions, covers with ceramic coating.Top layer compliant foil 31 can also use the ceramic nano micropowder sintering of 40% zirconium oxide+30% alpha-aluminium oxide+30% magnesium aluminate spinels to laminate.
As shown in Figure 6, the cross section of real rotor axle 2 is unlikely to be a desirable circle, and when out-of-roundness have impact on the pressure of air film in rotary course, the top layer compliant foil 31 in gas bearing moves down, and lower cavity pressure becomes upper cavity pressure reduction greatly.
After making bearing clearance increase for reducing armature spindle precision, the impact of gas film pressure and distribution is then also declined by armature spindle 2 out-of-roundness accordingly.So completing start and after reaching equilibrium state when the hydrodynamic gas-lubricated bearing of this raising bearing clearance reaches enough rotating speeds, its bearing rigidity and bearing capacity all decline to some extent compared with the bearing that gap is less.What at this moment need introducing magnetic bearing makes up this point.
When load load is on armature spindle 2 and when making armature spindle 2 be gradually reduced close to top layer compliant foil 31, electromagnetic bearing 1 can obtain the signal of the air pressure increase that pressure transducer 6 transmits, and starts to get involved work.Electromagnetic bearing 1 is not entirely and directly makes it suspend on armature spindle 2 magneticaction, but use magnetic force by top layer compliant foil 31 actively upwardly so as to actively improve lower cavity pressure, adapt to the weight of load on armature spindle 2, automatically redistribute the pressure of all directions overdraught in bearing.When armature spindle 2 arrives new equilbrium position, namely electromagnetic bearing 1 quits work, unless new disturbance occurs.
When there being external impact disturbance to occur, armature spindle 2 is likely to rapidly close to top layer compliant foil 31.If now gas bearing fails to respond in time, it is likely that cause making local gas flow velocity close to even up to velocity of sound, occurring thus causing shock wave to produce Pneumatic hammer phenomenon because Instantaneous Void between Thermo is too small.The generation of shock wave can cause local gas flow generation disturbance and confusion, and when fluid velocity changes between velocity of sound to subsonic speed, its pressure is that staged is remarkably decreased.At this moment hydrokinetic principle is then contrary with normal conditions, and the flow clearance between armature spindle 2 surface and top layer compliant foil 31 is more little, and pressure is more low on the contrary.In this case then need the surface of top layer compliant foil 31 actively " dodging " armature spindle 2, produce bigger flow clearance so that air velocity maintains between subsonic area as far as possible, to safeguard its normal fluid pressure.
Under the operating mode of this compensation ability beyond gas bearing self, if wanting to make gas bearing continue normal operation, it is necessary to introduce an external force and readjust the relative position between top layer compliant foil 31 and armature spindle 2.Be equivalent to the gap needed to utilize between effect " haling out " stenosis armature spindle 2 and the top layer compliant foil 31 of electromagnetic bearing 1.At this moment, then the magnetic pole at two ends is needed to control in the direction with identical polarity excitation.Namely the direction that gap is little produces suction, and for resorption top layer compliant foil 31, the suction that the direction that gap is big produces is used for retracting armature spindle 2.The difference utilizing two ends magneticaction distance produces magnetic deviation, pulls armature spindle 2 to recover the normal clearance between top layer compliant foil 31 with this, so that the air-flow of gas bearing and operating mode come back to poised state.Equal situation is if it occur that on traditional gas magnetic combined bearing of low technological requirement (gap is bigger), then can produce gas bearing makes rotor constantly be pressed to axle sleeve side by gas differential pressure owing to losing adaptive adjustment capability, and electromagnetic bearing then produces magnetic force and attempts " pulling " rotor.Mutual antagonism is defined between two bearings.And opinion bearing rigidity is often that gas bearing is stronger in such cases, therefore cause occurring between two set bearing systems that constantly " dragsaw " produces significantly shake or " locked in a stalemate " and armature spindle cannot be made to return to normal operating conditions, a series of problems having a strong impact on bearing working and performance such as " stiff " mutually always.
Dynamic pressure type gas bearing of the present utility model also needs to retain a set of displacement transducer.Because hydrodynamic gas-lubricated bearing does not have the auxiliary of external source of the gas, it is necessary to produce source of the gas by self structure.So this gas magnetic combined bearing based on hydrodynamic gas-lubricated bearing generally requires the ability of reservation " 0 starting " and " hot car jerk ".Namely when rotor speed is very low or is about to stop, the bleed pressure of gas bearing is very low, it is impossible to the weight of load rotor completely, is at this moment then susceptible to serious abrasion.So this stage needs the intervention of displacement transducer, actively use electromagnetic bearing temporarily to be held up by rotor, after rotor speed rises to and meets gas bearing load working condition or have descended to be nearly completed the desirable operating mode of parking, switch other duty again.
Claims (7)
1. the active hydrodynamic gas-lubricated bearing that an electromagnetism enables, including electromagnetic bearing (1) and be nested in the elastic foil bearing (3) between electromagnetic bearing (1) and armature spindle (2), it is characterized in that, described elastic foil bearing (3) includes top layer compliant foil (31) and bottom compliant foil (32), described top layer compliant foil (31) is non-magnet material, and the surface distributed at top layer compliant foil (31) has multiple each independent magnetic material region.
2. the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism as claimed in claim 1 enables, it is characterized in that, described magnetic material region is strip magnetic material region or point-like magnetic material region, multiple strip magnetic material regions or point-like magnetic material region are uniformly distributed, and the length direction in described strip magnetic material region is parallel with the axis direction of armature spindle (2).
3. the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism as claimed in claim 2 enables, it is characterized in that, described top layer compliant foil (31) is flat paillon foil, described bottom compliant foil (32) is ripple paillon foil, described flat paillon foil is made up of the stainless steel band of non-magnet material, after the surface of top layer compliant foil (31) hides and sprays multiple each independent magnetic material regions, cover with ceramic coating.
4. the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism as described in claim 1-3 any one enables, it is characterized in that, also include elastic foil bearing seat (4), bear box (5) and pressure transducer (6), described electromagnetic bearing (1) is positioned between elastic foil bearing seat (4) and bear box (5), described elastic foil bearing seat (4) is for installing bottom layer compliant foil (32), the probe of described pressure transducer (6) is used for measuring the gas pressure at bottom compliant foil (32) place through elastic foil bearing seat (4).
5. the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism as claimed in claim 4 enables, it is characterized in that, also include left end cap (7) and right end cap (8), described electromagnetic bearing (1) includes magnetic pole (11) and the coil (12) being wrapped on magnetic pole (11), described magnetic pole (11) has multiple, it is arranged between elastic foil bearing seat (4) and bear box (5), the even cloth of circumference along gas bearing, the axis of armature spindle (2) is pointed in one end of described magnetic pole (11), described left end cap (7) and right end cap (8) are positioned at elastic foil bearing seat (4) and bear box (5) two ends, magnetic pole (11) is compressed.
6. the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism as claimed in claim 5 enables, it is characterized in that, described pressure transducer (6) has 8, it is positioned at the middle part of gas bearing, the even cloth of circumference along gas bearing, described magnetic pole (11) has 8, and each magnetic pole (11) forms for silicon steel plate stacking.
7. the active hydrodynamic gas-lubricated bearing that a kind of electromagnetism as claimed in claim 6 enables, it is characterised in that the material of described elastic foil bearing seat (4), left end cap (7) and right end cap (8) is duralumin material.
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| CN201620168863.4U CN205388095U (en) | 2016-03-04 | 2016-03-04 | Electromagnetism makes active dynamic pressure gas bearing of ability |
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| CN201620168863.4U CN205388095U (en) | 2016-03-04 | 2016-03-04 | Electromagnetism makes active dynamic pressure gas bearing of ability |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545956A (en) * | 2016-03-04 | 2016-05-04 | 至玥腾风科技投资有限公司 | Electromagnetically enabled active hydrodynamic gas-lubricated bearing |
| CN106545576A (en) * | 2017-01-18 | 2017-03-29 | 哈尔滨工业大学 | Fluid structurecoupling formula gas shock-wave adjusts bearing |
| CN107237820A (en) * | 2017-07-03 | 2017-10-10 | 燕山大学 | A kind of passive journal bearing of dual suspension of electromagnetism hydrostatic |
| CN109038961A (en) * | 2018-07-25 | 2018-12-18 | 郑州泰恩科技有限公司 | A kind of motor protecter just installed |
| CN109707737A (en) * | 2018-12-28 | 2019-05-03 | 西安交通大学 | A kind of more watts of lap belts that bottom can incline preload elastic foil gas bearing |
| CN110030269A (en) * | 2019-04-24 | 2019-07-19 | 上海捷氢科技有限公司 | Elastic foil gas bearing and elastic foil gas bearing friction are secondary |
-
2016
- 2016-03-04 CN CN201620168863.4U patent/CN205388095U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545956A (en) * | 2016-03-04 | 2016-05-04 | 至玥腾风科技投资有限公司 | Electromagnetically enabled active hydrodynamic gas-lubricated bearing |
| WO2017147949A1 (en) * | 2016-03-04 | 2017-09-08 | 至玥腾风科技投资集团有限公司 | Electromagnetically enabled active type dynamic gas bearing |
| US10520024B2 (en) | 2016-03-04 | 2019-12-31 | Technologies' Xanadu Of Resonatory-Solar-Systemed Co., Ltd. | Electromagnetically enabled active dynamic pressure gas bearing |
| CN106545576A (en) * | 2017-01-18 | 2017-03-29 | 哈尔滨工业大学 | Fluid structurecoupling formula gas shock-wave adjusts bearing |
| CN106545576B (en) * | 2017-01-18 | 2020-07-24 | 哈尔滨工业大学 | Fluid-solid coupling type gas shock wave adjusting bearing |
| CN107237820A (en) * | 2017-07-03 | 2017-10-10 | 燕山大学 | A kind of passive journal bearing of dual suspension of electromagnetism hydrostatic |
| CN109038961A (en) * | 2018-07-25 | 2018-12-18 | 郑州泰恩科技有限公司 | A kind of motor protecter just installed |
| CN109707737A (en) * | 2018-12-28 | 2019-05-03 | 西安交通大学 | A kind of more watts of lap belts that bottom can incline preload elastic foil gas bearing |
| CN110030269A (en) * | 2019-04-24 | 2019-07-19 | 上海捷氢科技有限公司 | Elastic foil gas bearing and elastic foil gas bearing friction are secondary |
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Address after: 100088 room 301-1, No. 2, Xinfeng street, Beijing, Xicheng District Patentee after: TECHNOLOGIES' XANADU OF RESONATORY-SOLAR-SYSTEMED Co.,Ltd. Address before: 100004 Beijing, Chaoyang District, No. 1 Jianguo Street, China World Trade Center, No. three, building 25 Patentee before: TECHNOLOGIES' XANADU OF RESONATORY-SOLAR-SYSTEMED Co.,Ltd. |
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Effective date of registration: 20210118 Address after: 100029 room 104, No.101, building 3, yard a 29, North Third Ring Middle Road, Xicheng District, Beijing Patentee after: Zhiyue Tengfeng Technology Group Co.,Ltd. Patentee after: XUNLING TENGFENG AUTOMOTIVE POWER TECHNOLOGY (BEIJING) Co.,Ltd. Address before: 100029 room 104, No.101, building 3, yard a 29, North Third Ring Middle Road, Xicheng District, Beijing Patentee before: Zhiyue Tengfeng Technology Group Co.,Ltd. |
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Effective date of registration: 20210331 Address after: 100176 room 1202a, 12 / F, block B, building 1, yard 19, Ronghua Middle Road, economic and Technological Development Zone, Daxing District, Beijing Patentee after: Jin Pu Address before: 100029 room 104, No.101, building 3, yard a 29, North Third Ring Middle Road, Xicheng District, Beijing Patentee before: Zhiyue Tengfeng Technology Group Co.,Ltd. Patentee before: XUNLING TENGFENG AUTOMOTIVE POWER TECHNOLOGY (BEIJING) Co.,Ltd. |
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Effective date of registration: 20210427 Address after: Room 104, room 101, building 3, yard a 29, Beisanhuan Middle Road, Xicheng District, Beijing 100029 Patentee after: Zhiyue Tengfeng Technology Group Co.,Ltd. Patentee after: XUNLING TENGFENG AUTOMOTIVE POWER TECHNOLOGY (BEIJING) Co.,Ltd. Address before: 100176 room 1202a, 12 / F, block B, building 1, yard 19, Ronghua Middle Road, economic and Technological Development Zone, Daxing District, Beijing Patentee before: Jin Pu |
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Address after: 100029 room 104, No.101, building 3, yard a 29, North Third Ring Middle Road, Xicheng District, Beijing Patentee after: Zhiyue Tengfeng Technology Group Co.,Ltd. Patentee after: Yongxu Tengfeng new energy power technology (Beijing) Co.,Ltd. Address before: 100029 room 104, No.101, building 3, yard a 29, North Third Ring Middle Road, Xicheng District, Beijing Patentee before: Zhiyue Tengfeng Technology Group Co.,Ltd. Patentee before: XUNLING TENGFENG AUTOMOTIVE POWER TECHNOLOGY (BEIJING) Co.,Ltd. |
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Effective date of registration: 20230406 Address after: Room 104, Room 101, Building 3, Yard A29, North Third Ring Middle Road, Xicheng District, Beijing, 100011 Patentee after: Zhiyue Tengfeng Technology Group Co.,Ltd. Patentee after: Beijing Yongxu Tengfeng New Energy Power Technology Development Co.,Ltd. Address before: 100029 room 104, No.101, building 3, yard a 29, North Third Ring Middle Road, Xicheng District, Beijing Patentee before: Zhiyue Tengfeng Technology Group Co.,Ltd. Patentee before: Yongxu Tengfeng new energy power technology (Beijing) Co.,Ltd. |
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