CN108757444A - A kind of triangle rotor type hydraulic pump motor - Google Patents
A kind of triangle rotor type hydraulic pump motor Download PDFInfo
- Publication number
- CN108757444A CN108757444A CN201810767663.4A CN201810767663A CN108757444A CN 108757444 A CN108757444 A CN 108757444A CN 201810767663 A CN201810767663 A CN 201810767663A CN 108757444 A CN108757444 A CN 108757444A
- Authority
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- China
- Prior art keywords
- rotor
- stator
- pump motor
- bent axle
- hydraulic pump
- 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.)
- Pending
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- 239000004484 Briquette Substances 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 26
- 238000010276 construction Methods 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 19
- 238000007789 sealing Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a kind of triangle rotor type hydraulic pump motors, including cylinder body, stator, rotor, bent axle, sealed briquette, holddown spring and crankshaft bearing, the pump motor is triangle rotor type structure, its rotor is revolved round the sun in shell around crankshaft axis simultaneously because bent axle has eccentric structure, drive rotor rotation, the variation for realizing oil pocket volume, to realize mutual conversion of the mechanical energy to hydraulic energy.The hydraulic pump motor has the characteristics that smooth running, power density are high, simple in structure, reliability is high due to its unique structure.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, in particular to a kind of triangle rotor type hydraulic pump motor.
Background technology
Hydraulic drive is using fluid as working media, and a kind of driving form for being transmitted and being controlled to energy has
The advantages that High power output, compact-sized, small, speed governing facilitate and are easily controllable, is widely used in engineering machinery, building machine
Tool, lathe, on vehicle.
One complete hydraulic system is made of five parts, i.e. dynamical element, executive component, control element, auxiliary element
And hydraulic oil.Dynamical element of the hydraulic pump as hydraulic system converts the mechanical energy that prime mover inputs to hydraulic energy output, is
Hydraulic system provides pressure oil-source.Hydraulic motor is the executive component of hydraulic system, and the hydraulic pressure of input can be changed into it
The mechanical energy of output shaft.From the viewpoint of energy conversion, hydraulic pump and hydraulic motor are reversible Hydraulic Elements, they have
Same structural element, i.e., it is closed and can mechanical periodicity volume and corresponding oil distribution mechanism.
Common hydraulic pump, hydraulic motor generally have gear type, vane type, plunger type three types.Gear pump has knot
The advantages that structure is simple, easily manufactured, small, rotating speed is high, cheap, while its disadvantage is than more prominent, i.e. its flow and pressure
Power pulsation is larger, and discharge capacity is non-adjustable, and leakage, pocketed oil, that is, radial hydraulic pressure imbalance are to influence the three of gear pump performance indicators to ask greatly
Topic.Vane pump its work smooth running, noise is small, lasts a long time, while gap is small between its complicated, movement parts, to oil
The viscosity accommodation of liquid is relatively narrow, and oil absorption is not so good, and price valence is high, and operating pressure is generally relatively low.Plunger pump is due to it
Parts coordinate precision height, good seal performance, can still have higher volumetric efficiency under high pressure, pass through the stroke for changing plunger
Variable adjusting may be implemented, have many advantages, such as that pressure is high, compact-sized, efficient, while its is complicated, parts machining work
Skill is high, and more sensitive to oil contamination, cost is higher.
Important directions of the hybrid power as new-energy automobile, due to its continual mileage length, oil-saving discharging-reducing effect protrusion etc.
Feature, it is more and more to be paid attention to by domestic and international automobile vendor.Since hydraulic system has power density height, good reliability, fortune
The features such as row is steady, is the important aspect of hybrid power.For this special applications of the hybrid vehicle based on hydraulic system,
Generally require its compact-sized hydraulic actuator part and with engine fitness height, smooth running, it is efficient, simple in structure can
Lean on, power bi-directional conversion can be achieved etc..For this application, the hydraulic pump of three of the above type is difficult in structure, cost, performance
On reach balanced, there is an urgent need to a kind of pump motor assemblies can be applied to vehicle hydraulic hybrid power system at present.
Invention content
For the above-mentioned prior art the problem of, the present invention provide a kind of hydraulic pump of triangle rotor type, have
The features such as smooth running, power density are high, simple in structure, reliability is high, structure size is flexible, low to oil contamination susceptibility.
The hydraulic pump motor can be single three-apexed rotor structure or two or more rotor structures.
To achieve the above object, the present invention provides the following technical solutions：
A kind of triangle rotor type hydraulic pump motor, including cylinder body, stator, rotor, bent axle, sealed briquette, holddown spring and
Crankshaft bearing；
The cylinder body includes the shell and drive end bearing bracket being tightly connected, and the cylinder body is ellipsoid cyclic structure, oval at its
All both sides are respectively equipped with two hydraulic fluid ports；
The stator is fixedly connected on the end cap, and it is one that stator, crankshaft bearing and bent axle ecto-entad are set with successively
The axis of body, stator is equipped with external toothing；
The rotor is class isosceles triangular structure, and center is circular hollow-core construction, and hollow-core construction includes ring gear
With no gear ring, the external toothing of ring gear and stator coordinates, and no gear ring coordinates with bent axle；
The groove extended to class isosceles triangle center position, the holddown spring peace are equipped at three angles of the rotor
Mounted in channel bottom, the sealed briquette is located at trench interiors, is pressed on the holddown spring.
Further, the rotor, stator, end cap, crankshaft bearing are respectively 2, symmetrical structure centered on the bent axle,
The left and right sides is off-centre operation, is coordinated respectively without gear ring by bearing shell and rotor.
Further, it is rotor quantity to have 4*N hydraulic fluid port, N on shell.
Beneficial effects of the present invention are as follows：
1. shell is divided into 3 separate spaces by the rotor of triangular structure, when for hydraulic pump pattern, 3 spaces are respectively
Oil suction, oil extraction action, single triangular rotor autobiography one week are completed, each space can realize that 2 cycles, 3 spaces are realized 6 times
Cycle, double three-apexed rotor structures can realize 12 pump oil cycles.When as hydraulic motor pattern, 12 actings can be similarly realized
Cycle.Its working cycles is often and working space is evenly distributed, with small vibration to operate steadily；
It is with small vibration, noise is small 2. compared to the not reciprocal linear motion of plunger pump；
3. dual-rotor structure or more rotor structures make bearing balanced radial force, bearing wear is reduced, improves service life；
Front and back end has the structure of output shaft convenient coaxially arranged with other component；
4. rotor gear is meshed with stator external toothing, it can be achieved that rotor, which rotates one week crank rotation, is more than increasing in one week
Speed, rotor speed are less than speed of crankshaft, and the abrasion of rotor seal briquetting is small；
5. carrying out end face seal using sealed briquette and holddown spring, sealing effect is good, pump motor plot ratio is high, ties up simultaneously
It is high to protect period length, reliability.
6. using oblong inner-cavity structure, facilitate processing, for sealed briquette without bounce, noise is small, close in rotor rotation process
Envelope is reliable, can reach higher rotating speed in the case where keeping plot ratio.
7. being engaged with external gear by ring gear between rotor and stator, machine driving reliability is high.
8. being bearing shell between bent axle and rotor, rotation is smooth, and frictional resistance is small.
Description of the drawings
Fig. 1 is that the planing surface diagram of the triangle rotor type hydraulic pump motor of the present invention is intended to；
Fig. 2 is the triangle rotor type hydraulic pump motor internal structure schematic diagram of the present invention；
Fig. 3 is the triangle rotor type hydraulic pump motor operation principle schematic diagram clockwise of the present invention.
In figure：Rotor, 7 shells, 8 bent axles, 9 are pressed behind rotor, 6 before stator, 5 behind 1 drive end bearing bracket, 2 rear end caps, 3 front stators, 4
Crankshaft bearing, 13 bearing shells, 71 hydraulic fluid ports, 72 hydraulic fluid ports, 73 hydraulic fluid ports, 74 hydraulic fluid ports behind block, 10 holddown springs, 11 front crankshaft bearings, 12.
Specific implementation mode
It is right with reference to the attached drawing of the present invention in order to make those skilled in the art more fully understand technical scheme of the present invention
Technical scheme of the present invention carries out clear, complete description, and based on the embodiment in the application, those of ordinary skill in the art exist
The other similar embodiments obtained under the premise of not making creative work, shall fall within the protection scope of the present application.
Embodiment one：
As depicted in figs. 1 and 2, triangle rotor type hydraulic pump motor of the invention includes：It is drive end bearing bracket 1, rear end cap 2, preceding fixed
Son 3, rear stator 4, preceding rotor 5, rear rotor 6, shell 7, bent axle 8, briquetting 9, holddown spring 10, front crankshaft bearing 11, rear bent axle
Bearing 12, bearing shell 13；
Drive end bearing bracket 1, rear end cap 2 are connected by front end, the rear end of the bolt and shell 7 that are uniformly distributed in periphery respectively
It connects, further includes sealing structure in the prior art and seal member, realize the sealing of fluid；
Front stator 3, rear stator 4 are connected by being uniformly distributed in the bolt of reference circle with drive end bearing bracket 1, rear end cap 2 respectively
It connects, the circumference on the inside of front stator 3, rear stator 4 is equipped with external toothing；
Front crankshaft bearing 11, rear crankshaft bearing 12 are respectively fitted over the rear and front end of bent axle 8, outer circumference surface respectively with it is preceding fixed
Son 3, rear stator 4 are interference fitted, and realize the support of bent axle, are further included sealing structure in the prior art and seal member, are realized
The sealing of fluid；
Preceding rotor 5, rear rotor 6 are the identical class isosceles triangular structure of shape, and internal is circular hollow structure, including
Ring gear and smooth circle, external toothing gear of the ring gear respectively with front stator 3, rear stator 4 are engaged；
Shell 7 is bilateral symmetry, and both sides section is long circular ring shape, and centre is the partition board with circular hole, left and right two
Side is respectively equipped with oil inlet and outlet symmetrical above and below, and under the premise of not changing pump motor rotation direction, the pressure of oil inlet and outlet is different,
The operating mode of pump motor is different；
Preceding rotor 5, rear rotor 6 apex be groove structure, sealed briquette 9 assigns into ditch by holddown spring 10
In slot, sealed briquette 9 realizes that preceding rotor, rear rotor and inner walls seal, and sealed briquette 9 is arrowhead-shaped structure, avoids sealing
Briquetting, which is completely forced into groove, loses sealing function；
Symmetrical structure centered on bent axle 8, central point both sides are off-centre operation structure, by bearing shell 13 and preceding rotor 5, are turned afterwards
The smooth circle of son 6 is coordinated.
As shown in figure 3, pump motor is during the work time, three oil pockets, respectively A can be divided between rotor 5 and shell 7
Chamber, B chambers, C chambers, three cavity operating phases differ 120 degree.Four hydraulic fluid ports on shell 7 are respectively hydraulic fluid port 71, hydraulic fluid port 72, oil
Mouth 73, hydraulic fluid port 74, when illustrating rotor clockwise rotation, hydraulic fluid port 71, hydraulic fluid port 73 are oil inlet, and hydraulic fluid port 72, hydraulic fluid port 74 are fuel-displaced
Mouthful.By taking A chambers as an example, when rotor 5 rotates clockwise one week, six positions shown in Fig. 3 are the work that rotor 5 rotates clockwise one week
Make schematic diagram, adjacent position rotor rotates 60 degree.Explanation is in based on pump motor under pump pattern below, and oil outlet pressure is high at this time
In inlet pressure, corresponding when pump motor is under motoring mode, inlet pressure is higher than oil outlet pressure.
As shown in the positions Fig. 3 one, pump motor rotates clockwise under the driving that external mechanical energy exports, at this time A cavitys by
Gradual change is big, and fluid enters A intracavitary by hydraulic fluid port 71；Shown in the positions Fig. 3 two, A chambers reach maximum volume at this time；Three institute of the positions Fig. 3
Show, as rotor 5 rotates, A chamber volumes constantly reduce, and hydraulic oil is discharged by hydraulic fluid port 72；Shown in the positions Fig. 3 four, with rotor 5
Continue to rotate by position four, A chamber volumes constantly increase, and hydraulic oil enters by hydraulic fluid port 73 in cavity；Shown in the positions Fig. 3 five, A chambers
Reach maximum volume；Shown in the positions Fig. 3 six, as rotor 5 rotates, A chamber volumes constantly reduce, and fluid is discharged by hydraulic fluid port 74.
Rotor 5 rotates a circle, and A chambers realize two oil inlet, oil extraction working cycles；Rotor 5 rotates one week, and three chambers of pump motor side can
Realize that six tasks recycle, the pump motor of dual-rotor structure can realize 12 working cycles.
In 5 rotation process of rotor of triangle, side is coordinated by bearing shell 13 and the off-centre operation of bent axle 8, internal tooth
The internal gear of circle is meshed with the gear of stator 3；5 internal gear of rotor is different from the number of gear teeth of 3 external toothing of stator, and rotor 5 exists
In 3 rotary course of stator, there is certain speed ratio, rotor 5 drives bent axle 8 to rotate at this time, realizes that rotor 5 rotates one week bent axle
8 is rotatable mostly all.
In 5 rotation process of rotor, sealed briquette 9 is pressed on shell by the holddown spring 10 in three-apexed rotor top channel
7 inner surface realizes the fluid sealing between three cavitys, and in 5 rotation process of rotor, sealed briquette 9 is in holddown spring 10
Under the action of stretching motion, the reliable sealing between oil pocket can be realized under different angle.
When double triangle rotor type pump motors of the present invention are applied to hybrid vehicle, according to hybrid power system configuration,
It may be arranged between engine and clutch or between clutch and gearbox, that is, constitute P1 types or P2 type hybrid power systems
System.Match the composable hydraulic hybrid power system such as corresponding control element, auxiliary element, hydraulic oil.When hydraulic system needs
When absorbing energy, pump motor is in pump pattern, and mechanical energy is converted into hydraulic energy by pump motor and is stored in accumulator, works as hydraulic pressure
When system needs to release energy, pump motor is in motoring mode, and the hydraulic energy being stored in accumulator is converted by pump motor
The mechanical energy of rotation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (3)
1. a kind of triangle rotor type hydraulic pump motor, which is characterized in that including cylinder body, stator, rotor, bent axle, sealed briquette, pressure
Tight spring and crankshaft bearing；
The cylinder body includes the shell and drive end bearing bracket being tightly connected, and the cylinder body is ellipsoid cyclic structure, in its long circumference two
Side is respectively equipped with two hydraulic fluid ports；
The stator is fixedly connected on the end cap, and stator, crankshaft bearing and bent axle ecto-entad are set with successively to be integrated, fixed
The axis of son is equipped with external toothing；
The rotor is class isosceles triangular structure, and center is circular hollow-core construction, and hollow-core construction includes ring gear and nothing
The external toothing of gear ring, ring gear and stator coordinates, and no gear ring coordinates with bent axle；
The groove extended to class isosceles triangle center position is equipped at three angles of the rotor, the holddown spring is mounted on
Channel bottom, the sealed briquette are located at trench interiors, are pressed on the holddown spring.
2. a kind of triangle rotor type hydraulic pump motor according to claim 1, which is characterized in that the rotor, stator, end
Lid, crankshaft bearing be respectively 2, symmetrical structure centered on the bent axle, the left and right sides be off-centre operation, respectively by bearing shell with
Rotor coordinates without gear ring.
3. a kind of triangle rotor type hydraulic pump motor according to claim 1, which is characterized in that have 4*N on shell
Hydraulic fluid port, N are rotor quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767663.4A CN108757444A (en) | 2018-07-13 | 2018-07-13 | A kind of triangle rotor type hydraulic pump motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767663.4A CN108757444A (en) | 2018-07-13 | 2018-07-13 | A kind of triangle rotor type hydraulic pump motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108757444A true CN108757444A (en) | 2018-11-06 |
Family
ID=63973563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810767663.4A Pending CN108757444A (en) | 2018-07-13 | 2018-07-13 | A kind of triangle rotor type hydraulic pump motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108757444A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953149A (en) * | 2021-02-24 | 2021-06-11 | 同济大学 | Radial magnetic flux birotor motor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851271A (en) * | 2006-05-22 | 2006-10-25 | 陕西科技大学 | Triangular rotor hydraulic pump |
| CN201078244Y (en) * | 2007-06-22 | 2008-06-25 | 浙江王力车业有限公司 | Motor air pump dual-purpose gas energy conversion device and energy saving system using the same |
| CN201354734Y (en) * | 2009-02-23 | 2009-12-02 | 谭立平 | Triangle rotor type delivery pump |
| CN102477936A (en) * | 2011-04-14 | 2012-05-30 | 马树成 | Triangular-rotor hydraulic motor |
| CN203822624U (en) * | 2014-04-02 | 2014-09-10 | 中国石油大学(华东) | Novel duplex triangular rotor hydraulic pump |
| CN104235010A (en) * | 2014-09-09 | 2014-12-24 | 青岛润鑫伟业科贸有限公司 | Novel duplex triangle rotor hydraulic pump |
| CN105715541A (en) * | 2015-12-23 | 2016-06-29 | 山东创能机械科技有限公司 | Extrusion type eccentric rotary oil transfer pump, application and use method thereof |
| CN105715540A (en) * | 2015-12-23 | 2016-06-29 | 山东创能机械科技有限公司 | Extrusion type eccentric rotor pump and use method thereof |
| CN209053779U (en) * | 2018-07-13 | 2019-07-02 | 吉林大学青岛汽车研究院 | A kind of triangle rotor type hydraulic pump motor |
-
2018
- 2018-07-13 CN CN201810767663.4A patent/CN108757444A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851271A (en) * | 2006-05-22 | 2006-10-25 | 陕西科技大学 | Triangular rotor hydraulic pump |
| CN201078244Y (en) * | 2007-06-22 | 2008-06-25 | 浙江王力车业有限公司 | Motor air pump dual-purpose gas energy conversion device and energy saving system using the same |
| CN201354734Y (en) * | 2009-02-23 | 2009-12-02 | 谭立平 | Triangle rotor type delivery pump |
| CN102477936A (en) * | 2011-04-14 | 2012-05-30 | 马树成 | Triangular-rotor hydraulic motor |
| CN203822624U (en) * | 2014-04-02 | 2014-09-10 | 中国石油大学(华东) | Novel duplex triangular rotor hydraulic pump |
| CN104235010A (en) * | 2014-09-09 | 2014-12-24 | 青岛润鑫伟业科贸有限公司 | Novel duplex triangle rotor hydraulic pump |
| CN105715541A (en) * | 2015-12-23 | 2016-06-29 | 山东创能机械科技有限公司 | Extrusion type eccentric rotary oil transfer pump, application and use method thereof |
| CN105715540A (en) * | 2015-12-23 | 2016-06-29 | 山东创能机械科技有限公司 | Extrusion type eccentric rotor pump and use method thereof |
| CN209053779U (en) * | 2018-07-13 | 2019-07-02 | 吉林大学青岛汽车研究院 | A kind of triangle rotor type hydraulic pump motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953149A (en) * | 2021-02-24 | 2021-06-11 | 同济大学 | Radial magnetic flux birotor motor |
| CN112953149B (en) * | 2021-02-24 | 2022-09-20 | 同济大学 | Radial magnetic flux birotor motor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181106 |
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| RJ01 | Rejection of invention patent application after publication |