CN108649751A - Axle construction and motor with it - Google Patents
Axle construction and motor with it Download PDFInfo
- Publication number
- CN108649751A CN108649751A CN201810759698.3A CN201810759698A CN108649751A CN 108649751 A CN108649751 A CN 108649751A CN 201810759698 A CN201810759698 A CN 201810759698A CN 108649751 A CN108649751 A CN 108649751A
- Authority
- CN
- China
- Prior art keywords
- lug boss
- axis body
- axle construction
- motor
- motor casing
- 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
Links
- 238000010276 construction Methods 0.000 title claims abstract description 27
- 230000005611 electricity Effects 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
Abstract
The present invention provides a kind of axle construction and with its motor, which includes axis body and lug boss, and lug boss is set on the end face of axis body at least one end, and lug boss is extended along axis body axial direction, and lug boss is used to discharge the shaft current on axis body 20.By the way that lug boss is arranged at least one end face of axis body, lug boss is used to discharge the shaft current on axis body, setting avoids bearing and is corroded by shaft current in this way, the service life of bearing greatly improved, and because convex structure simply makes the cost reduction for eliminating shaft current.
Description
Technical field
The present invention relates to technical field of motors, in particular to a kind of axle construction and with its motor.
Background technology
Bearing is one of critical piece of motor and one of easy damaged component.Frequency converter and electric control system are more multiple
Miscellaneous, shaft current problem is just more notable, and the galvano-cautery that shaft current generates has become the main of frequency control motor damage of the bearing
Reason.
In frequency changing driving system, pwm pulse control motor movement state, when IGBT switching speeds are very fast, electricity are usually adopted
The quick variation (high dv/dt) of machine anode-cathode voltage will form the common-mode voltage of saltus step over the ground, common mode in entire electric system
Voltage forms common mode current by inverter, the distributed constant of power line, motor etc., and common mode current finally flow back into inverter
Form a complete common mode current circuit.
Oil film between bearing ball and Internal and external cycle is very thin, can be equivalent to a parasitic capacitance, and IGBT, which is switched, to be formed
Common mode current charges to oil lamella, and when charging voltage increases to a certain extent, shaft voltage will puncture oil film electric discharge, and discharge sparklet
It burns bearing and generates small rut, form spot corrosion, with the continuous expansion of bearing spot corrosion area, damage of the bearing gradually forms and expands
It dissipates so that the service life of bearing substantially shortens, and operational reliability also decreases.
In the prior art, insulation bearing room, optimization frequency converter hardware and software are mainly used for the elimination of shaft current
Design, shaft end add carbon brush and using the methods of conductive carbon fibres, and it is higher that these methods implement cost.
Invention content
The main purpose of the present invention is to provide a kind of axle construction and with its motor, to solve to eliminate in the prior art
Shaft current problem of high cost.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of axle construction, including：Axis body；Protrusion
Portion, lug boss are set on the end face of axis body at least one end, and lug boss is extended along axis body axial direction, and lug boss is for releasing
Put the shaft current on axis body.
Further, lug boss is multiple, and multiple lug bosses are evenly arranged on the end face of axis body.
Further, the first end of lug boss is connected with the end face of axis body, and the second end of lug boss is free end, protrusion
The cross section of the first end in portion to the second end of lug boss is gradually reduced.
Further, the geometric center lines of the length direction of lug boss and the axis of axis body coincide.
Further, lug boss is wholely set with axis body, alternatively, lug boss is removably disposed with axis body.
Further, lug boss is threadedly coupled with axis body, alternatively, lug boss is welded to connect with axis body.
Further, lug boss is made of metal material.
According to another aspect of the present invention, a kind of motor, including axle construction are provided, axle construction is above-mentioned axle construction.
Further, motor includes：Motor casing；The first end of axis body extends to the outside of motor casing, the second end of axis body
It is arranged on the inside of motor casing, the end face of the second end of axis body and is provided with lug boss, the inner wall of lug boss and motor casing has
The setting of distance ground, lug boss discharge the shaft current on axis body to motor casing.
Further, the second end of lug boss is d, d≤15mm at a distance from motor casing.
It applies the technical scheme of the present invention, by the way that lug boss is arranged at least one end face of axis body, lug boss is used for
The shaft current on axis body is discharged, is arranged in this way and is avoided bearing and corroded by shaft current, greatly improved the service life of bearing, and because
Convex structure simply makes the cost reduction for eliminating shaft current.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the embodiment of motor according to the present invention；
Fig. 2 shows the enlarged structure schematic diagrams at A in Fig. 1.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, motor casing；20, axis body；30, lug boss.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
It should be noted that term " first ", " second " etc. in the description and claims of this application and attached drawing
It is for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that the art used in this way
Language can be interchanged in the appropriate case, so that presently filed embodiment described herein for example can be in addition to illustrating herein
Or the sequence other than those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment need not limit
In those of clearly listing step or unit, but may include not listing clearly or for these processes, method, production
The intrinsic other steps of product or equipment or unit.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
Now, the illustrative embodiments according to the application are more fully described with reference to the accompanying drawings.However, these are exemplary
Embodiment can be implemented by many different forms, and should not be construed to be limited solely to embodiment party set forth herein
Formula.It should be understood that thesing embodiments are provided so that disclosure herein is thoroughly and complete, and these are shown
The design of example property embodiment is fully conveyed to those of ordinary skill in the art, in the accompanying drawings, for the sake of clarity, it is possible to expand
The big thickness of layer and region, and make that identical device is presented with like reference characters, thus omission retouches them
It states.
In conjunction with shown in Fig. 1 to Fig. 2, according to an embodiment of the invention, a kind of axle construction is provided.
Specifically, as shown in Figure 1, the axle construction includes axis body 20 and lug boss 30, lug boss 30 be set to axis body 20 to
On the end face of few one end, lug boss 30 is extended along 20 axial direction of axis body, and lug boss 30 is used to discharge the axis on axis body 20
Electric current.
In the present embodiment, by the way that lug boss is arranged at least one end face of axis body, lug boss is for discharging axis body
On shaft current, setting in this way avoids bearing and corroded by shaft current, the service life of bearing greatly improved, and because of lug boss knot
Structure simply makes the cost reduction for eliminating shaft current.
Further, lug boss 30 is multiple, and multiple lug bosses 30 are evenly arranged on the end face of axis body 20.It sets in this way
It sets so that multiple lug bosses complete point discharge process jointly, preferably discharges shaft current.
In the present embodiment, the first end of lug boss 30 is connected with the end face of axis body 20, and the second end of lug boss 30 is
The cross section of free end, the second end of the first end of lug boss 30 to lug boss 30 is gradually reduced.Setting is so that lug boss in this way
30 preferably realize point discharge.
Wherein, the geometric center lines of the length direction of lug boss 30 and the axis of axis body 20 coincide.Setting ensures in this way
It will not be vibrated because axis body quality is uneven when axis body rotation.
In addition, lug boss 30 is wholely set with axis body 20, alternatively, lug boss 30 is removably disposed with axis body 20.Wherein
Lug boss 30 is removably disposed the convertibility for improving lug boss with axis body 20, after lug boss long-time service deforms
It can replace in time.
Further, lug boss 30 is threadedly coupled with axis body 20, alternatively, lug boss 30 is welded to connect with axis body 20.In this way
Setting is assembled convenient for lug boss with axis body.
Preferably, lug boss 30 is made of metal material.Certain lug boss may be other conductive materials, such as graphite
Deng.
The axis body of above-described embodiment can be also used for technical field of motors, i.e., according to another aspect of the present invention, provides
A kind of motor, the motor include axle construction, and axle construction is the axle construction of above-described embodiment.
In the present embodiment, motor includes motor casing 10.The first end of axis body 20 extends to the outside of motor casing 10, axis body
20 second end, which is arranged on the inside of motor casing 10, the end face of the second end of axis body 20, is provided with lug boss 30, lug boss 30
There is distance it is arranged with the inner wall of motor casing 10, lug boss 30 discharges the shaft current on axis body 20 to motor casing 10.Electricity
Chassics earth, shaft current finally import the earth through motor casing, eliminate influence of the shaft current to motor shaft and bearing, are arranged in this way
It can ensure that bearing is reliable, safely run.
Further, the second end of lug boss 30 is d, d≤15mm at a distance from motor casing 10.When lug boss is apart from motor
Shell too far when, do not have point discharge effect, when the second end of lug boss 30 with motor casing 10 at a distance from less than 15mm when, tip
Discharge effect is best.
When motor 20 high-speed cruising of axis body, common-mode voltage is generated over the ground, common mode current will flow to axis body 20, and pass through axis
Hold with motor casing 10, subsequently enter and be returned to frequency converter after the earth, form a complete current loop.Since bearing roller exists
Lubricating oil film surface is run, and forms bearing capacitance, capacitive coupling between stator winding and shaft, when shaft voltage rises to centainly
Value, bearing capacitance and other parasitic capacitances charge, and to avoid capacitance voltage is excessive oil film is caused to puncture, countershaft bearing generates
Galvano-cautery can need to be tip-like metallic conductor in the non-shaft stretching end mounting boss 30 of axis body 20, lug boss 30, in bearing electricity
Hold voltage to reach before oil film breakdown voltage threshold through lug boss to 10 point discharge of motor casing, motor casing 10 is grounded, release electricity
Pressure, it is ensured that bearing is reliable, safely runs.
Safe and reliable fixation for lug boss, the non-shaft stretching end that can be used in axis body 20 open threaded hole, lug boss
Non- tip is processed as screw thread, using threaded connection, it is ensured that lug boss fixed reliability safely；Alternatively, by the way of welding,
Lug boss is connect with axis body 20, point discharge and the requirement being reliably fixed equally may be implemented.
Than that described above, it is also necessary to which explanation is " one embodiment " spoken of in the present specification, " another implementation
Example ", " embodiment " etc. refer to that specific features, structure or the feature of embodiment description is combined to be included in the application summary
Property description at least one embodiment in.It is not centainly to refer to the same reality that statement of the same race, which occur, in multiple places in the description
Apply example.Furthermore, it is understood that when describing a specific features, structure or feature in conjunction with any embodiment, what is advocated is knot
Other embodiment is closed to realize that this feature, structure or feature are also fallen within the scope of the present invention.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiment.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of axle construction, which is characterized in that including：
Axis body (20)；
Lug boss (30), the lug boss (30) are set on the axis body (20) at least end face of one end, the lug boss
(30) it is extended along the axis body (20) axial direction, the lug boss (30) is used to discharge the axis electricity on the axis body (20)
Stream.
2. axle construction according to claim 1, which is characterized in that the lug boss (30) is multiple, multiple protrusions
Portion (30) is evenly arranged on the end face of the axis body (20).
3. axle construction according to claim 1, which is characterized in that the first end of the lug boss (30) and the axis body
(20) end face is connected, and the second end of the lug boss (30) is free end, and the first end of the lug boss (30) is to described
The cross section of the second end of lug boss (30) is gradually reduced.
4. axle construction according to claim 1, which is characterized in that the geometric center of the length direction of the lug boss (30)
Line and the axis of the axis body (20) coincide.
5. axle construction according to claim 1, which is characterized in that the lug boss (30) integrally sets with the axis body (20)
It sets, alternatively, the lug boss (30) is removably disposed with the axis body (20).
6. axle construction according to claim 1, which is characterized in that the lug boss (30) connects with the axis body (20) screw thread
It connects, alternatively, the lug boss (30) is welded to connect with the axis body (20).
7. axle construction according to claim 1, which is characterized in that the lug boss (30) is made of metal material.
8. a kind of motor, including axle construction, which is characterized in that the axle construction is the axis described in any one of claim 1 to 7
Structure.
9. motor according to claim 8, which is characterized in that including：
Motor casing (10)；
The first end of the axis body (20) extends to the outside of the motor casing (10), and the second end setting of the axis body (20) exists
The inside of the motor casing (10) is provided with the lug boss (30) on the end face of the second end of the axis body (20), described convex
There is the inner wall for playing portion (30) and the motor casing (10) distance ground to be arranged, and the lug boss (30) will be on the axis body (20)
Shaft current is discharged to motor casing (10).
10. motor according to claim 9, which is characterized in that the second end of the lug boss (30) and the motor casing
(10) distance is d, d≤15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759698.3A CN108649751A (en) | 2018-07-11 | 2018-07-11 | Axle construction and motor with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759698.3A CN108649751A (en) | 2018-07-11 | 2018-07-11 | Axle construction and motor with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108649751A true CN108649751A (en) | 2018-10-12 |
Family
ID=63750906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810759698.3A Pending CN108649751A (en) | 2018-07-11 | 2018-07-11 | Axle construction and motor with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108649751A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394921A (en) * | 2021-06-30 | 2021-09-14 | 南阳防爆（苏州）特种装备有限公司 | Induction motor and production process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203761671U (en) * | 2013-11-29 | 2014-08-06 | 乐视致新电子科技（天津）有限公司 | Circuit board with electrostatic protection structure |
| CN104037985A (en) * | 2014-06-04 | 2014-09-10 | 湖南海捷主轴科技有限公司 | Motor rotor anti-static discharging device and assembly method |
| CN107681836A (en) * | 2017-11-24 | 2018-02-09 | 合肥巨动力系统有限公司 | A kind of motor for eliminating bearing galvano-cautery |
| CN207010423U (en) * | 2017-08-01 | 2018-02-13 | 江天电机有限公司 | Variable-frequency motor disappears shaft current device |
| CN208337344U (en) * | 2018-07-11 | 2019-01-04 | 珠海格力电器股份有限公司 | Axle construction and motor with it |
-
2018
- 2018-07-11 CN CN201810759698.3A patent/CN108649751A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203761671U (en) * | 2013-11-29 | 2014-08-06 | 乐视致新电子科技（天津）有限公司 | Circuit board with electrostatic protection structure |
| CN104037985A (en) * | 2014-06-04 | 2014-09-10 | 湖南海捷主轴科技有限公司 | Motor rotor anti-static discharging device and assembly method |
| CN207010423U (en) * | 2017-08-01 | 2018-02-13 | 江天电机有限公司 | Variable-frequency motor disappears shaft current device |
| CN107681836A (en) * | 2017-11-24 | 2018-02-09 | 合肥巨动力系统有限公司 | A kind of motor for eliminating bearing galvano-cautery |
| CN208337344U (en) * | 2018-07-11 | 2019-01-04 | 珠海格力电器股份有限公司 | Axle construction and motor with it |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394921A (en) * | 2021-06-30 | 2021-09-14 | 南阳防爆（苏州）特种装备有限公司 | Induction motor and production process thereof |
| CN113394921B (en) * | 2021-06-30 | 2024-01-23 | 南阳防爆（苏州）特种装备有限公司 | Induction motor and production process thereof |
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