CN211163147U - Cooling structure for rear end bearing of electric spindle - Google Patents
Cooling structure for rear end bearing of electric spindle Download PDFInfo
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- CN211163147U CN211163147U CN201921974971.0U CN201921974971U CN211163147U CN 211163147 U CN211163147 U CN 211163147U CN 201921974971 U CN201921974971 U CN 201921974971U CN 211163147 U CN211163147 U CN 211163147U
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- cooling
- rear end
- cavity
- bearing
- main shaft
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- 238000001816 cooling Methods 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 230000005611 electricity Effects 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims abstract description 8
- 239000000110 cooling liquid Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model discloses an electricity main shaft rear end bearing cooling structure, establish the cooling chamber of spindle between two bearings of electricity main shaft rear end including the cover, the cooling intracavity is provided with an at least baffle, the baffle separates into a plurality of mutually independent cavities with the cooling chamber along the dabber axial, be provided with the clearance between baffle and the cooling intracavity lateral wall to make the mutual circulation of coolant liquid between the adjacent cavity, be provided with the inlet channel who carries the coolant liquid for cooling chamber front end cavity on the bearing frame of electricity main shaft rear end, still be provided with the flowing back passageway that is linked together with cooling chamber rear end cavity. The device has simple structure and good cooling effect.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment and specifically relates to an electricity main shaft rear end bearing cooling structure is related to.
Background
The electric main shaft is a new technology which integrates a machine tool main shaft and a main shaft motor into a whole and appears in the field of numerical control machine tools, and the electric main shaft, a linear motor technology and a high-speed cutter technology push high-speed processing to a new era. The electric spindle comprises the electric spindle and accessories thereof, and comprises the electric spindle, a high-frequency conversion device, an oil mist lubricator, a cooling device, a built-in encoder, a tool changer and the like. The rotor of the motor is directly used as the main shaft of the machine tool, the shell of the main shaft unit is the motor base, and the motor and the main shaft of the machine tool are integrated by matching with other parts.
The electric main shaft comprises a shell-free motor, a main shaft, a bearing, a main shaft unit shell, a driving module, a cooling device and the like. The rotor of the motor is integrated with the main shaft by adopting a press-fit method, and the main shaft is supported by the front bearing and the rear bearing. The stator of the motor is mounted in the housing of the spindle unit by means of a cooling jacket. The speed change of the spindle is controlled by the spindle drive module, while the temperature rise in the spindle unit is limited by the cooling device. The rear end of the main shaft is provided with a speed measuring and angle measuring displacement sensor, and the inner taper hole and the end surface at the front end are used for installing a cutter.
Because the electric spindle integrates the motor into the spindle unit and has high rotating speed, a large amount of heat can be generated during operation, the temperature rise of the electric spindle is caused, the thermal state characteristic and the dynamic characteristic of the electric spindle are poor, and the normal work of the electric spindle is influenced. Therefore, it is necessary to take a certain measure to control the temperature of the electric spindle to be constant within a certain value. The machine tool generally cools the stator and the main shaft bearing of the electric main shaft by adopting a forced circulation oil cooling mode, namely cooling oil passing through an oil cooling device is forced to circulate outside the main shaft stator and the main shaft bearing, and heat generated by high-speed rotation of the main shaft is taken away. In addition, in order to reduce heat generation of the main shaft bearing, the main shaft bearing must be lubricated properly.
The rear end bearing of the electric spindle is usually designed in a double-bearing structure, the bearing is heated seriously when the rotating speed of the electric spindle reaches 10 thousands of revolutions per minute, and the existing heat dissipation and cooling structure design only dissipates heat of the shell and cannot dissipate heat of the rear end bearing effectively.
Disclosure of Invention
In view of the above, it is desirable to provide a cooling structure for a rear end bearing of an electric spindle, which has a simple structure and high cooling efficiency.
In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides an electricity main shaft rear end bearing cooling structure, establishes the cooling chamber of dabber between two bearings of electricity main shaft rear end including the cover, be provided with an at least baffle in the cooling chamber, the baffle separates into a plurality of mutually independent cavities with the cooling chamber along the dabber axial, be provided with the clearance between baffle and the cooling intracavity lateral wall to make the mutual circulation of coolant liquid between the adjacent cavity, be provided with the inlet channel who carries the coolant liquid for cooling chamber front end cavity on the bearing frame of electricity main shaft rear end, still be provided with the drainage channel who is linked together with cooling chamber rear end cavity.
Furthermore, two ends of the cooling cavity are respectively provided with an annular convex part surrounding the mandrel, and the convex parts are propped against the side wall of the outer ring of the bearing.
Furthermore, the cooling device also comprises a sleeve which is sleeved on the mandrel, and the cooling cavity is sleeved on the sleeve.
Furthermore, the cooling cavity comprises a cylinder, baffles arranged at two ends of the cylinder and the inner side wall of the bearing seat, and the baffles are propped against the inner side wall of the bearing seat.
Furthermore, the cooling cavity is made of a heat conducting material.
Further, the outer diameter of the partition plate is smaller than the inner diameter of the bearing seat.
Further, the liquid inlet channel and the liquid discharge channel are respectively arranged on two opposite sides of the cooling cavity.
Compared with the prior art, the utility model discloses following beneficial effect has: this device is through setting up a plurality of cooling cavities between two bearings of electric main shaft rear end to pour into the coolant liquid of circulation into in the cooling cavity, take away the heat that the dabber rotated and produced through the coolant liquid, avoid the bearing to generate heat seriously, prolong the life of bearing.
In order to make the aforementioned and other objects, features and advantages of the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic view of a usage status structure according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cooling chamber in an embodiment of the present invention.
In the figure: 1-mandrel, 2-bearing seat, 21-liquid inlet channel, 22-liquid discharge channel, 3-bearing, 4-cooling cavity, 41-cylinder, 42-baffle, 43-convex part, 44-partition plate, 45-cavity and 5-shaft sleeve.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1-3, a cooling structure for rear end bearings of an electric spindle comprises a shaft sleeve 5 sleeved on a spindle 1 between two bearings 3 at the rear end of the electric spindle, a cooling cavity 4 is sleeved on the shaft sleeve 5, the cooling cavity 4 is composed of a cylinder 41, baffle plates 42 arranged at two ends of the cylinder 41 and inner side walls of a bearing seat 2, a partition plate 44 is arranged in the cooling cavity 4, the cooling cavity 4 is axially separated into two independent cavities 45 along the spindle 1 by the partition plate 44, the outer diameter of the partition plate 22 is smaller than the inner diameter of the bearing seat 2, so that the cooling liquid between the adjacent cavities 45 can mutually circulate, a liquid inlet channel 21 for conveying the cooling liquid to the front end cavity of the cooling cavity is arranged on the bearing seat 2, and a liquid discharge channel 22 communicated with the rear end cavity of the cooling.
In this embodiment, the annular protrusion 43 surrounding the mandrel is disposed on the peripheral side of the outer wall surface of the baffle 42, and the protrusion 43 abuts against the outer ring side wall of the bearing 3, so as to reduce the contact area between the cooling cavity and the bearing 3 and prevent heat generated by the rotation of the mandrel from being transferred to the bearing.
In this embodiment, the cooling cavity 4 is made of a heat conductive material.
In this embodiment, the liquid inlet passage 21 and the liquid discharge passage 22 are respectively provided on two opposite sides of the cooling chamber 4, so that the cooling liquid flows fully in the chamber to sufficiently absorb heat.
In this embodiment, the electric spindle stator is provided with a liquid supply channel connected to the liquid supply channel.
In this embodiment, be provided with the sealing washer between baffle and the bearing frame, avoid the coolant liquid to reveal and get into the bearing.
When the cooling device is used, the flow of cooling liquid in the cooling cavity is adjusted according to the rotating speed of the mandrel, the cooling liquid flows into the rear end cavity along the gap after passing through the front end cavity, and the cooling liquid is conveyed away from the liquid drainage channel after absorbing heat on the shaft sleeve.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides an electricity main shaft rear end bearing cooling structure which characterized in that: establish the cooling chamber of spindle between two bearings of electricity main shaft rear end including the cover, the cooling intracavity is provided with an at least baffle, the baffle separates into a plurality of mutually independent cavities with the cooling chamber along the dabber axial, be provided with the clearance between baffle and the cooling intracavity lateral wall to make the mutual circulation of cooling liquid between the adjacent cavity, be provided with the inlet channel who carries the coolant liquid for the cooling chamber front end cavity on the bearing frame of electricity main shaft rear end, still be provided with the flowing back passageway that is linked together with the cooling chamber rear end cavity.
2. The electric spindle rear end bearing cooling structure according to claim 1, wherein: and annular convex parts surrounding the core shaft are respectively arranged at two ends of the cooling cavity and are propped against the side wall of the outer ring of the bearing.
3. The electric spindle rear end bearing cooling structure according to claim 1, wherein: the cooling cavity is sleeved on the shaft sleeve.
4. The electric spindle rear end bearing cooling structure according to claim 1, wherein: the cooling cavity is composed of a cylinder, baffles arranged at two ends of the cylinder and the inner side wall of the bearing seat, and the baffles are abutted against the inner side wall of the bearing seat.
5. The electric spindle rear end bearing cooling structure according to claim 1, wherein: the cooling cavity is made of heat conducting materials.
6. The electric spindle rear end bearing cooling structure according to claim 4, wherein: the outer diameter of the partition plate is smaller than the inner diameter of the bearing seat.
7. The electric spindle rear end bearing cooling structure according to claim 1, wherein: the liquid inlet channel and the liquid discharge channel are respectively arranged on two opposite sides of the cooling cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921974971.0U CN211163147U (en) | 2019-11-15 | 2019-11-15 | Cooling structure for rear end bearing of electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921974971.0U CN211163147U (en) | 2019-11-15 | 2019-11-15 | Cooling structure for rear end bearing of electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211163147U true CN211163147U (en) | 2020-08-04 |
Family
ID=71821153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921974971.0U Active CN211163147U (en) | 2019-11-15 | 2019-11-15 | Cooling structure for rear end bearing of electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211163147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112405105A (en) * | 2021-01-25 | 2021-02-26 | 常州德匠数控科技有限公司 | Main shaft capable of being uniformly cooled and working method |
-
2019
- 2019-11-15 CN CN201921974971.0U patent/CN211163147U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112405105A (en) * | 2021-01-25 | 2021-02-26 | 常州德匠数控科技有限公司 | Main shaft capable of being uniformly cooled and working method |
| CN112405105B (en) * | 2021-01-25 | 2021-05-18 | 常州德匠数控科技有限公司 | Main shaft capable of being uniformly cooled and working method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230504 Address after: No. 38-101, Zucuobianli, Xitang, Tong'an District, Xiamen, Fujian Province, 361000 Patentee after: Yonghexing (Xiamen) Precision Machinery Co.,Ltd. Address before: No. 38, Dingdian Dian, Sudian Village, Hongtang Town, Tong'an District, Xiamen City, Fujian Province, 361000 Patentee before: Xiamen xintongxiang CNC Technology Co.,Ltd. |