CN106533019A - End cap and motor - Google Patents
End cap and motor Download PDFInfo
- Publication number
- CN106533019A CN106533019A CN201610981169.9A CN201610981169A CN106533019A CN 106533019 A CN106533019 A CN 106533019A CN 201610981169 A CN201610981169 A CN 201610981169A CN 106533019 A CN106533019 A CN 106533019A
- Authority
- CN
- China
- Prior art keywords
- end cap
- leg
- reinforcement
- lid
- natural frequency
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention provides an end cap and a motor. The end cap comprises a cap body and a supporting leg, wherein one end of the supporting leg is connected with one side of the cap body. The end cap further comprises an inherent frequency adjusting portion connected with the cap body or the supporting leg. Since the inherent frequency adjusting portion is arranged in the end cap, the structure of the end cap is changed, and the inherent frequency of the modal of each order is improved. The operation rotating speed of a device (such as a motor) using the end cap can avoid a resonance point, thereby effectively reducing noise decibel value and vibration value, substantially improving client experience and reducing safety risk caused by loosening of fasteners due to vibration. The end cap has the advantages of simple structure and low cost.
Description
Technical field
The present invention relates to mechanical field, more particularly to a kind of end cap and motor.
Background technology
Fig. 1 to Fig. 5 shows the structural representation of electric motor end cap of the prior art.As shown in Figures 1 to 5, existing skill
The leg 2 that electric motor end cap in art is included lid 1 and is connected with lid 1, lid 1 be centrally formed with bearing block 9 and opening position
7.Leg 2 includes multiple reinforcing plates 5, mutually separatedly arranges between these reinforcing plates 5.But, the end cap of this structure is consolidated
There is frequency to be likely located in the range of the normal revolution of motor, therefore, it is possible to larger resonance occur in motor operation course.
The content of the invention
The invention provides a kind of end cap and motor, hidden to solve generation resonance when end cap of the prior art has motion
The problem of trouble.
To solve the above problems, as one aspect of the present invention, there is provided a kind of end cap, including lid and leg, institute
The one end for stating leg is connected with the side of the lid, and the end cap also includes intrinsic with what the lid or the leg were connected
Frequency adjustment.
Preferably, the leg includes at least two, and the natural frequency adjustment portion includes the first reinforcement, described first
One end of reinforcement is connected with the two neighboring leg, another in the other end and the two neighboring leg
Individual connection.
Preferably, the side of the direction lid of first reinforcement is connected with the lid.
Preferably, first reinforcement is curved or linear.
Preferably, height of the height of first reinforcement less than or equal to the leg.
Preferably, thickness of the thickness of first reinforcement less than or equal to the leg.
Preferably, the natural frequency adjustment portion includes the second reinforcement, and second reinforcement is arranged on the leg
Two reinforcing plates between and connect described two reinforcing plates.
Preferably, direction of second reinforcement from the top surface to the other end of the leg extends.
Preferably, height of the height of second reinforcement less than or equal to the leg.
Preferably, the leg includes 3 to 5 reinforcing plates, passes through one between the two neighboring reinforcing plate
The second reinforcement connection.
Preferably, the thickness of the reinforcing plate is 3 to 30mm.
Preferably, the angle between the axis of the leg and the lid is acute angle.
Preferably, the leg adopts broken-line type structure or arcuate structure.
Preferably, the end cap also includes opening position reinforcement, is connected with the lateral wall of the opening position of the lid.
Preferably, the end cap also includes bearing chamber reinforcement, is protrusively provided the outside of the bearing block in the lid
On perisporium.
Present invention also offers a kind of motor, including above-mentioned end cap.
Due to being provided with natural frequency adjustment portion in the end cap in the present invention, therefore the structure of end cap is changed, improve
The natural frequency of its each order mode state, avoids resonance point using the running speed of the equipment (such as motor) of the end cap, has
Noise decibel value and vibration values are reduced effect, customer experience is greatly improved, is reduced the peace of the loosenings such as the securing member that vibration causes
Full hidden danger, the characteristics of with simple structure, low cost.
Description of the drawings
Fig. 1 schematically shows the axonometric chart of an angle of end cap of the prior art；
Fig. 2 schematically shows the axonometric chart of another angle of end cap of the prior art；
Fig. 3 schematically shows the top view of end cap of the prior art；
Fig. 4 schematically shows the C-C sectional views of Fig. 3；
Fig. 5 schematically shows the B-B sectional views of Fig. 3；
Fig. 6 schematically shows the axonometric chart of an angle of the end cap in the present invention；
Fig. 7 schematically shows the axonometric chart of another angle of the end cap in the present invention；
Fig. 8 schematically shows the top view of the end cap in the present invention；
Fig. 9 schematically shows the C-C sectional views of Fig. 8；
Figure 10 schematically shows the B-B sectional views of Fig. 8；
Figure 11 schematically shows the schematic diagram of single-mode system；
Figure 12 schematically shows the schematic diagram of many-degrees of freedom system；
Figure 13 schematically shows the first-order modal simulated response scattergram of end cap of the prior art；
Figure 14 schematically shows the second-order modal simulated response scattergram of end cap of the prior art；
Figure 15 schematically shows three order mode state simulated response scattergrams of end cap of the prior art；
Figure 16 schematically shows the first-order modal simulated response scattergram of the end cap in the present invention；
Figure 17 schematically shows the second-order modal simulated response scattergram of the end cap in the present invention；
Figure 18 schematically shows three order mode state simulated response scattergrams of the end cap in the present invention.
Reference in figure：1st, lid；2nd, leg；3rd, the first reinforcement；4th, the second reinforcement；5th, reinforcing plate；6th, it is open
Position reinforcement；7th, be open position；8th, bearing chamber reinforcement；9th, bearing block.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways for covering.
Refer to Fig. 6 to Figure 10, the end cap in the present invention, particularly a kind of electric motor end cap, including lid 1 and with the lid
At least one leg 2 of the connection of body 1, for example, can be one to four leg 2.One end of the leg 2 and the lid 1
Side connects, and the end cap also includes the natural frequency adjustment portion being connected with the lid 1 or the leg 2.
Due to being provided with natural frequency adjustment portion in the end cap in the present invention, therefore the structure of end cap is changed, improve
The natural frequency of its each order mode state, avoids resonance point using the running speed of the equipment (such as motor) of the end cap, has
Noise decibel value and vibration values are reduced effect, customer experience is greatly improved, is reduced the peace of the loosenings such as the securing member that vibration causes
Full hidden danger, the characteristics of with simple structure, low cost.
Natural frequency adjustment portion in the present invention can be some form of reinforcement, so, be adjusted by natural frequency
Portion can not only change natural frequency, and can increase intensity.Wherein, the present invention can arrange a natural frequency and adjust
Portion, it is also possible to which multiple natural frequency adjustment portions are set.Certainly, the natural frequency adjustment portion in the present invention can also be using others
Version, as long as the purpose for adjusting end cap natural frequency can be reached.
In the embodiment shown in Fig. 6 to Figure 10, the natural frequency adjustment portion in the present invention at least includes two, point
Wei not the first reinforcement 3 and the second reinforcement 4.
Fig. 6, Fig. 8 to Figure 10 are refer to, the first reinforcement 3 in the present invention is arranged between two neighboring leg 2, its
In, one end of the first reinforcement 3 is connected with one of leg 2, the other end is connected with another leg 2.In the reality of diagram
Apply in example, first reinforcement 3 is curved (now, the first reinforcement 3 can be flabellum shape), naturally it is also possible to be other shapes
Shape, such as linear etc..It is highly preferred that the outer surface of the side of the direction of the first reinforcement 3 lid 1 and the lid 1
Link into an integrated entity, preferably to improve intensity and adjust natural frequency.The height of first reinforcement 3 being less than or can be waited
Change in the range of the height of the leg 2, its radial thickness can be in the scope of the thickness less than or equal to the leg 2
Interior change.
And for example, the second reinforcement 4 in the present invention is then arranged on the inside of the leg 2, for connecting the phase in leg 2
Adjacent two reinforcing plates 5, so, arrange second reinforcement 4 between the two neighboring reinforcing plate 5 of leg 2, its at least by this two
The side of the close lid 1 of individual reinforcing plate 5 couples together.It is highly preferred that one end of the second reinforcement 4 is connected with lid 1, it is another
Direction of the end then from 1 surface of the lid to the other end of the leg 2 extends, and which highly can be less than or equal to described
Change in the range of the height of leg 2.
For example, each leg 2 in the present invention may include multiple reinforcing plates 5 (such as 3 to 5), in the present embodiment, appoint
What can be connected by second reinforcement 4 between the two neighboring reinforcing plate 5, the thickness of reinforcing plate 5 then can be with
For 3 to 30mm.
Additionally, in the embodiment shown in Fig. 5 to Figure 10, leg 2 uses broken-line type structure, itself and the lid 1
Axis between angle be acute angle.In other embodiments (not shown), the leg 2 in the present invention can also be tied using arc
Structure.
In addition to the above-mentioned natural frequency adjustment portion for changing end cap natural frequency, the present invention can also take some to tie
Improvement on structure, to improve intensity, solves the problems, such as that end cap Mechanical Structure Strength is not enough.
Preferably, the end cap also includes opening position reinforcement 6, is connected with the lateral wall of the opening position 7 of the lid 1.
So, the present invention improves structural strength, therefore can preferably make end cap by the reinforcement increased at end cap opening position
From the impact of temperature change and installing force when machining during production, transport and using.
Preferably, the end cap also includes bearing chamber reinforcement 8, is protrusively provided the outer of bearing block 9 in the lid 1
On the perisporium of side.As the machining accuracy of bearing chamber is higher, increases bearing chamber reinforcement 8 on the outside of bearing chamber, the portion can be strengthened
The structural strength divided, impacts to bearing chamber size during effectively prevent machining and use, improves dimensional accuracy,
Improve the service life after bearing loads and noise situations.On the outside of bearing chamber, the quantity of reinforcement, distribution and shape can change
Become, it is highly preferred that 8 quantity of bearing chamber reinforcement can be 1 to 36, can also be uniformly distributed circumferentially.On the outside of bearing chamber
The shape of reinforcement for its section with bearing chamber external side parallel or not parallel (such as triangular pyramid type shape), front view can be in
Rectangle is trapezoidal etc..On the outside of bearing chamber, reinforcement be except increasing structural strength, and then can also improve the chi in bearing room
Very little precision, because mechanical strength increases, the probability of deformation is just little by temperature change, installing force and other exopathogenic factors for its size.
Additionally, the present invention can also increase closing lid area by way of the contact area and thickness that increase end cap closing lid, from
And improve closing lid face with axial direction perpendicularity, reduce the impact of closing lid surface roughness, closing lid is more consolidated, raising end cap before
The axiality of bearing chamber afterwards, so as to optimized dimensions chain, the mechanical strength that makes closing lid part is higher, end cover surface roughness and closing lid
The impact of installing force is less, better assures that axiality therebetween, meanwhile, also make the rotor assembly of motor install and retrodeviate
The heart is less.
Present invention also offers a kind of motor, including above-mentioned end cap.The present invention is not only carried by natural frequency adjustment portion
The high mechanical strength of end cap, and change the natural frequency of motor mode, reduce resonance.With reference to Figure 11 to figure
18, explanation is further explained to the present invention.
In Figure 13 to Figure 18, it is most important that what concern was write exactly per a figure upper right corner is the numerical value of natural frequency, and not
The distribution situation of shade need to be excessively paid close attention to, shade only represents that rank vibration displacement under excitation is bigger, due to each
Displacement between figure representated by same color is not necessarily identical, therefore does not just represent the figure vibration fewer than light color of the figure more than light color
Greatly.
Inventor is to the end in the present invention shown in the end cap of the prior art shown in Fig. 1 to Fig. 5 and Fig. 6 to Figure 10
Lid carried out one, two, three order mode state simulated response scattergrams respectively, respectively as shown in Figure 13 to Figure 18, its natural frequency by
723Hz, 1068Hz, 1416Hz bring up to 1640Hz, 1958Hz, 2410Hz, and the principle that model analyses are calculated is following (hereinafter：m
For model quality, c damped coefficients, x vibration displacements, a second dervative is Velocity-acceleration, k rigidity impedances, f damping forces).
Resonance is close to driving frequency and the natural frequency of end cap, makes vibration increase caused phenomenon.Due to excitation frequency
Rate it has been determined that therefore the present invention the two is as far as possible avoided, solve end cap resonance to reach by changing the natural frequency of end cap
The purpose of hidden danger.Wherein, natural frequency is divided into single order, second order, three ranks etc., rule of thumb understands, the energy of first three rank is maximum, because
This can assert that the natural frequency of this three rank represents the natural frequency of the end cap.With 10000,12000,14000rpm these three excitations
As a example by frequency, motor 14000rpm rotating speeds, now, the total value of motor oscillating is big, energy is high, is badly in need of reducing, therefore with following
These three high rotating speeds are investigated in analysis mainly.
Wherein, motor speed divided by 60 value be under the rotating speed noise of motor vibration a frequency multiplication (14000/60=
233Hz), the test result according to noise of motor vibration, the noise and vibration peak value of tested motor occur in 1 frequency multiplication, 5.9
(6) frequency multiplication, 8 frequencys multiplication, i.e., be exactly 233Hz, 1374Hz, 1864Hz for the rotating speed of 14000rpm.
According to design requirement, it is necessary to reach these rotating speeds, thus the natural frequency of end cap should try one's best it is many high more than these
The Frequency point of rotating speed, i.e., can only improve end cap natural frequency.
First, by taking the single-degree-of-freedom viscous damping system shown in Figure 11 as an example, the motion side of its mechanics of system model
Formula is：
For free vibration, f=0 carries out pull-type conversion to formula both sides, can obtain：
ms2+ cs+k=0
Two roots of s can be solved by above formula,
In formula：The undamped inherent circular frequency of system, can obtain natural frequency and structure by following formula
The relation of stiffness coefficient and quality；ζ is damping, is the factor that dimension is 1.
Secondly, in the N degree of freedom Linear Time-Invariant Systems shown in Figure 12, N degree of freedom Linear Time-Invariant System is by N number of degree of freedom
The combination of N number of single-degree-of-freedom is transformed into, its differential equation of motion is：
Through Laplace transformation and matrixing, its Equation of Motion is：
(K-ω2+ j ω C) X (ω)=F (ω)
Known by Theory of Vibration, to linear time invariant system, any point of system is accordingly represented by each order mode state phase
The linear combination answered.Following formula is accordingly represented by l points, φ in formulalrFor l-th test point, the vibration shape system of r order mode states
Number.
It is exactly natural frequency by the ω of Matrix Solving, multiple degrees of freedom is actually that each quality and rigidity are transformed into square
Battle array, so as to obtain the natural frequency of one, two, three ranks.
Model analyses above are calculated one, two, the three order mode state simulated response scattergrams and its natural frequency of end cap,
1 rank model frequency of the motor in the present invention brings up to 1640Hz, avoids the 6 frequency multiplication corresponding frequency bands of 10000～14000rpm
982～1385Hz, while 2 rank model frequency 1958Hz avoid 8 frequencys multiplication (1833Hz) Frequency point of 14000rpm.
The Frequency point evaded more than is needed to be that motor is carried out noise testing, its test data is obtained after Fourier decomposition
It is distributed to its frequency multiplication, Jing analyzes 1 frequency multiplication, 5.9 (6) frequencys multiplication, 8 frequencys multiplication are to noise contribution highest, therefore should enter professional etiquette from these frequencys multiplication
Keep away when high rotating speed (particularly).
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (16)
1. a kind of end cap, it is characterised in that including lid (1) and leg (2), one end and the lid (1) of the leg (2)
Side connection, the end cap also includes the natural frequency adjustment portion being connected with the lid (1) or the leg (2).
2. end cap according to claim 1, it is characterised in that the leg (2) including at least two, the natural frequency
Adjustment portion includes the first reinforcement (3), in one end of first reinforcement (3) and the two neighboring leg (2)
Connection, the other end and another in the two neighboring leg (2) are connected.
3. end cap according to claim 2, it is characterised in that the direction lid (1) of first reinforcement (3)
Side is connected with the lid (1).
4. the end cap according to Claims 2 or 3, it is characterised in that first reinforcement (3) is curved or linear.
5. the end cap according to Claims 2 or 3, it is characterised in that the height of first reinforcement (3) is less than or equal to
The height of the leg (2).
6. the end cap according to Claims 2 or 3, it is characterised in that the thickness of first reinforcement (3) is less than or equal to
The thickness of the leg (2).
7. the end cap according to any one of claim 1-3, it is characterised in that the natural frequency adjustment portion include second plus
Strong muscle (4), second reinforcement (4) are arranged between two reinforcing plates (5) of the leg (2) and connect described two adding
Strong plate (5).
8. end cap according to claim 7, it is characterised in that second reinforcement (4) is by the lid (1) surface
Direction to the other end of the leg (2) extends.
9. end cap according to claim 8, it is characterised in that the height of second reinforcement (4) is less than or equal to institute
State the height of leg (2).
10. end cap according to claim 7, it is characterised in that the leg (2) includes 3 to 5 reinforcing plates (5),
By the second reinforcement (4) connection between the two neighboring reinforcing plate (5).
11. end caps according to any one of claim 7-10, it is characterised in that the thickness of the reinforcing plate (5) be 3 to
30mm。
12. end caps according to claim 1, it is characterised in that between the leg (2) and the axis of the lid (1)
Angle be acute angle.
13. end caps according to claim 1, it is characterised in that the leg (2) is tied using broken-line type structure or arc
Structure.
14. end caps according to claim 1, it is characterised in that the end cap also includes opening position reinforcement (6), with institute
State the lateral wall connection of the opening position (7) of lid (1).
15. end caps according to claim 1, it is characterised in that the end cap also includes bearing chamber reinforcement (8), prominent
Be arranged in the outer perimeter wall of bearing block (9) of the lid (1).
16. a kind of motors, it is characterised in that including the end cap any one of claim 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981169.9A CN106533019B (en) | 2016-11-08 | 2016-11-08 | End cover and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981169.9A CN106533019B (en) | 2016-11-08 | 2016-11-08 | End cover and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106533019A true CN106533019A (en) | 2017-03-22 |
| CN106533019B CN106533019B (en) | 2023-07-21 |
Family
ID=58349945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610981169.9A Active CN106533019B (en) | 2016-11-08 | 2016-11-08 | End cover and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106533019B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231056A (en) * | 2017-07-31 | 2017-10-03 | 广东威灵电机制造有限公司 | The end cap and washing motor of washing motor |
| CN112271852A (en) * | 2020-10-09 | 2021-01-26 | 中国第一汽车股份有限公司 | Permanent magnet synchronous motor end cover for reducing noise |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201181873Y (en) * | 2008-03-10 | 2009-01-14 | 中山大洋电机股份有限公司 | Electric motor end closure |
| CN203607979U (en) * | 2013-11-30 | 2014-05-21 | 中山大洋电机制造有限公司 | Motor end cover and motor having the same |
| CN203734420U (en) * | 2014-01-16 | 2014-07-23 | 苏州德丰电机有限公司 | Generator end cover |
| CN204349679U (en) * | 2015-01-24 | 2015-05-20 | 浙江品溢电机有限公司 | A kind of electric motor end cap |
| CN206283356U (en) * | 2016-11-08 | 2017-06-27 | 珠海格力电器股份有限公司 | End cap and motor |
-
2016
- 2016-11-08 CN CN201610981169.9A patent/CN106533019B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201181873Y (en) * | 2008-03-10 | 2009-01-14 | 中山大洋电机股份有限公司 | Electric motor end closure |
| CN203607979U (en) * | 2013-11-30 | 2014-05-21 | 中山大洋电机制造有限公司 | Motor end cover and motor having the same |
| CN203734420U (en) * | 2014-01-16 | 2014-07-23 | 苏州德丰电机有限公司 | Generator end cover |
| CN204349679U (en) * | 2015-01-24 | 2015-05-20 | 浙江品溢电机有限公司 | A kind of electric motor end cap |
| CN206283356U (en) * | 2016-11-08 | 2017-06-27 | 珠海格力电器股份有限公司 | End cap and motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231056A (en) * | 2017-07-31 | 2017-10-03 | 广东威灵电机制造有限公司 | The end cap and washing motor of washing motor |
| CN107231056B (en) * | 2017-07-31 | 2023-09-01 | 广东威灵电机制造有限公司 | End cover of washing motor and washing motor |
| CN112271852A (en) * | 2020-10-09 | 2021-01-26 | 中国第一汽车股份有限公司 | Permanent magnet synchronous motor end cover for reducing noise |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106533019B (en) | 2023-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104467261B (en) | Electric machine assembly and the range hood with it | |
| US8938933B2 (en) | Wall section for a wind turbine tower and wind turbine tower | |
| CN106533019A (en) | End cap and motor | |
| CN105257778A (en) | Multi-degree-of-freedom low-frequency vibration-isolation gasket | |
| EP2899394B1 (en) | Wind turbine with damping | |
| CN102493924A (en) | Fan and tower tube thereof | |
| CN206283356U (en) | End cap and motor | |
| US10408194B2 (en) | Acoustic damping system for a wind turbine tower | |
| CN201757146U (en) | X-shaped or diamond-shaped series steel wire rope vibration isolator | |
| CN204633489U (en) | Rotor pack | |
| TW556388B (en) | Stator of rotating electric machine and rotating electric machine using the same | |
| CN207274314U (en) | A kind of bump leveller and there is its vehicle | |
| CN107482824A (en) | A kind of fixed structure of support and stator core | |
| CN206943322U (en) | The isolation mounting of actuating unit and the electric automobile comprising the isolation mounting | |
| CN108138786A (en) | For the connecting element of wheel hub being connected to blade in industrial axial flow blower and the blade system for including the connecting element | |
| EP3154165B1 (en) | Flywheel unit with damping device | |
| CN106297917A (en) | A kind of fuel assembly Dynamic Simulation device and analogy method thereof | |
| CN207583483U (en) | Vibration damping cooling fan mounting bracket and apply its cooling system, automobile | |
| CN207053284U (en) | Back end cover for motor and motor | |
| CN105864051B (en) | A kind of muffler assembly and compressor | |
| CN205377603U (en) | Rotor machine cover rotor equipment is inserted to motor | |
| JP6646449B2 (en) | Vertical pump | |
| CN205265413U (en) | External rotor electric machine and cabinet air conditioner and air conditioner smallpox machine used thereof | |
| CN217499715U (en) | Box frame of washing equipment and washing equipment with same | |
| CN206842784U (en) | Compensation wheel beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |