CN201027986Y - Helical seal device at end of electric principal shaft - Google Patents
Helical seal device at end of electric principal shaft Download PDFInfo
- Publication number
- CN201027986Y CN201027986Y CN 200720003527 CN200720003527U CN201027986Y CN 201027986 Y CN201027986 Y CN 201027986Y CN 200720003527 CN200720003527 CN 200720003527 CN 200720003527 U CN200720003527 U CN 200720003527U CN 201027986 Y CN201027986 Y CN 201027986Y
- Authority
- CN
- China
- Prior art keywords
- screw
- cover
- sealing
- sealing cover
- cone surface
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 230000005611 electricity Effects 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract 2
- 230000001133 acceleration Effects 0.000 abstract 1
- 239000002173 cutting fluid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
- B23Q11/0883—Protective coverings for parts of machine tools; Splash guards for spindles, e.g. for their bearings or casings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The utility model relates to a shaft end helixseal device of an electric main shaft which comprises a screw cover [1] and a sealing cover [2]. The screw cover [1] is connected with a rotor shaft [3] of the electric main shaft through threads, and the sealing cover [2] is fixed on a bearing base [5]. A left turning thread groove is acquired from the outer round surface of the screw cover [1] by turning, and a cone surface is acquired from the lower end by turning, an inner hole of the sealing cover [2] is grinded to be smooth, the upper end of the sealing cover [2] is drilled with a hole leading to the outside, a cone surface is acquired from the lower end of the sealing cover [2] by turning, and the cone surface is matched with the cone surface of the screw cover [1] to be a cone-shaped gap. When the electric main shaft rotates, the rotor shaft can drive the screw cover [1] to rotate along the counterclockwise direction, the air filling the sealing gap can be driven to flow from the upper side to the lower side along the left-turning screw threads of the screw cover [1], a through hole opened on the sealing cover [2] can continuously deliver air to the screw gap, thereby a continuous airflow from the upper side to the lower side is formed in the screw gap; when the air flow enters the screw groove, the volume is reduced while the pressure is increased, the airflow with a certain pressure and consistency can stop the cutting liquid from the outside or the cuttings to enter the inside of the electric main shaft, a main sealing effect can be achieved. The cone surface at the lower end of the screw cover can throw out the cutting liquid from the cone surface or cuttings from the upper side to the lower side in an acceleration manner, so the sealing effect can be strengthened.
Description
Technical Field
The utility model relates to a technical improvement of electric main shaft end sealing device.
Background
In the working process of cutting metal, the cutting fluid is used for cooling the cutter of the machine tool, so that the cutting fluid can enter the interior of the electric spindle from a moving gap and a static gap between a rotor shaft and a shell of the electric spindle in the working process, and the bearing is damaged or the insulating strength of a stator coil is reduced. But because the rotating speed of the electric spindle is high, the contact sealing is not applicable; the structure space is small, the general non-contact sealing is used, and the sealing effect is difficult to achieve.
Disclosure of Invention
An object of the utility model is to design an electric main shaft's axle head spiral sealing device to solve electric main shaft's the sealed problem of axle head.
The purpose of the utility model is realized like this:
a shaft end spiral sealing device of an electric main shaft comprises a threaded sleeve and a sealing cover, wherein the threaded sleeve is connected with a rotor shaft of the electric main shaft through threads, and the sealing cover is fixed on a bearing seat. The outer circle surface of the screw sleeve is turned into a spiral groove, the lower end part of the screw sleeve is turned into a conical surface, and an included angle alpha is formed between the conical surface and the rotating axis of the conical surface; the inner hole of the sealing cover is ground smoothly, and the upper end surface of the sealing cover is drilled to be communicated with the outside. When the electric main shaft runs, the rotor shaft drives the screw sleeve to rotate together, air filled in the sealing gap is driven to pump downwards along the threads on the surface of the screw sleeve, the pressure of the air flow is increased due to the reduction of the volume when the air flow enters the spiral groove, and the air flow with certain pressure prevents external cutting fluid or cuttings from entering the inside of the electric main shaft to play a role in sealing.
The utility model has the advantages that: 1. the structure is simple, and the installation and the manufacture are convenient; 2. when the electric spindle runs, the rotor shaft drives the threaded sleeve to rotate at a high speed, and air entering the sealing gap is pumped out by the aid of the air pressurizing pump, so that external cutting fluid is prevented from entering the sealing gap, and the sealing effect is good.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the electric spindle shaft end spiral sealing device of the present invention.
In the figure: 1. screw sleeve, 2 sealing cover, 3 rotor shaft, 4 bearing and 5 bearing seat
Detailed Description
As shown in figure 1, the shaft end spiral sealing device of the electric spindle comprises a screw sleeve [1] and a sealing cover [2]. The screw sleeve [1] is connected to a rotor shaft [3] of the electric spindle through threads, and the sealing cover [2] is fixed on the bearing seat [5 ]. A left-handed spiral groove is turned on the outer circular surface of the screw sleeve [1], the lower end part is turned into a conical surface, and an included angle alpha is formed between the conical surface and the rotating axis of the conical surface; the inner hole of the sealing cover [2] is ground smoothly, the upper end surface of the sealing cover is drilled to lead to the outside, and the lower end of the sealing cover is turned into a conical surface to be matched with the conical surface of the screw sleeve to form a section of conical gap. The radial clearance S = 0.02-0.05 mm between the excircle spiral tooth crest of the screw sleeve [1] and the inner hole of the sealing cover [2 ]; the included angle between the lower end conical surface and the rotating axis of the lower end conical surface is between 20 and 30 degrees.
When the electric main shaft runs, the rotor shaft drives the screw sleeve to rotate at a high speed at a rotating speed n, the rotating direction is anticlockwise when viewed from bottom to top, and the external thread of the screw sleeve is a left-handed thread, so that air filled in the sealing gap is driven to move downwards along the thread as if the nut loosens along the screw rod, and is finally pumped out of the spiral groove, and the through hole formed in the sealing cover can continuously convey air from the outside into the spiral gap, so that a continuous air flow from top to bottom is formed in the spiral gap; when the air flow enters the spiral groove, the pressure of the air flow is increased due to the reduction of the volume, and the continuous air flow with certain pressure can prevent external cutting fluid or cutting scraps from entering the interior of the electric main shaftTo the primary sealing action. The conical surface at the lower end of the screw sleeve is used for throwing cutting fluid or chips splashed or creeping into the gap out of the outer part: the linear velocities of the points on the outer ring surface are:
as can be seen from the above formula, the linear velocity v is proportional to the radius r of rotation, and since the radius r of the cone surface gradually increases from top to bottom, the linear velocity v at each point on the cone surface from top to bottom also gradually increases. The cutting fluid or chips attached to the conical surface are gradually accelerated from top to bottom, and when reaching the lower end of the conical surface, the speed reaches the maximum value and is thrown out, so that the sealing effect is enhanced.
Claims (4)
1. The utility model provides an axle head spiral sealing device of electricity main shaft, includes swivel nut [1] and sealed lid [2], its characterized in that: the outer circular surface of the screw sleeve [1] is turned into a left-handed spiral groove, the lower end part of the screw sleeve is turned into a conical surface, and an included angle alpha is formed between the conical surface and the rotating axis of the conical surface; the inner hole of the sealing cover [2] is ground smoothly, the hole drilled on the upper end surface of the sealing cover is led to the outside, and the lower end of the sealing cover is turned into a conical surface to be matched with the conical surface at the lower end of the screw sleeve.
2. The sealing device of claim 1, wherein: the radial clearance between the top of the excircle spiral tooth and the inner hole of the sealing cover is S = 0.02-0.05 mm.
3. The sealing device of claim 1, wherein: the included angle alpha between the conical surface and the rotating axis is = 20-30 degrees.
4. The sealing device of claim 1, wherein: the upper end face of the sealing cover is drilled and led to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720003527 CN201027986Y (en) | 2007-02-09 | 2007-02-09 | Helical seal device at end of electric principal shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720003527 CN201027986Y (en) | 2007-02-09 | 2007-02-09 | Helical seal device at end of electric principal shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201027986Y true CN201027986Y (en) | 2008-02-27 |
Family
ID=39132197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720003527 Expired - Lifetime CN201027986Y (en) | 2007-02-09 | 2007-02-09 | Helical seal device at end of electric principal shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201027986Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269307B (en) * | 2008-05-06 | 2010-06-02 | 无锡同济江加建材科技有限公司 | Axle end sealing device of high speed dispersion mechanism |
| CN102563084A (en) * | 2011-11-25 | 2012-07-11 | 宁波钜德精工机械有限公司 | Bypass air sealing structure |
| CN101633133B (en) * | 2008-07-23 | 2014-02-19 | 兄弟工业株式会社 | Air pressure switching method for machine tools and machine tools |
| CN104279339A (en) * | 2013-07-11 | 2015-01-14 | 发那科株式会社 | Machine tool |
| CN105134963A (en) * | 2015-08-18 | 2015-12-09 | 洛阳轴研科技股份有限公司 | Grease lubrication main shaft system |
| CN105965039A (en) * | 2016-06-29 | 2016-09-28 | 科德数控股份有限公司 | High-speed rotary joint and using method thereof |
| CN109317701A (en) * | 2018-11-12 | 2019-02-12 | 靖江斯贝得电机制造有限公司 | A kind of axial seal of electro spindle |
| CN114198237A (en) * | 2021-12-28 | 2022-03-18 | 南方电网调峰调频发电有限公司鲁布革水力发电厂 | Main shaft sealing device of mixed-flow water turbine |
| CN116241723A (en) * | 2022-12-29 | 2023-06-09 | 北方矿业有限责任公司 | A New Composite Sealing Device Suitable for Mill Feed End |
-
2007
- 2007-02-09 CN CN 200720003527 patent/CN201027986Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269307B (en) * | 2008-05-06 | 2010-06-02 | 无锡同济江加建材科技有限公司 | Axle end sealing device of high speed dispersion mechanism |
| CN101633133B (en) * | 2008-07-23 | 2014-02-19 | 兄弟工业株式会社 | Air pressure switching method for machine tools and machine tools |
| CN102563084A (en) * | 2011-11-25 | 2012-07-11 | 宁波钜德精工机械有限公司 | Bypass air sealing structure |
| CN104279339A (en) * | 2013-07-11 | 2015-01-14 | 发那科株式会社 | Machine tool |
| US9709170B2 (en) | 2013-07-11 | 2017-07-18 | Fanuc Corporation | Machine tool including sealing structure in rotation unit |
| CN104279339B (en) * | 2013-07-11 | 2017-08-04 | 发那科株式会社 | machine tool |
| CN105134963A (en) * | 2015-08-18 | 2015-12-09 | 洛阳轴研科技股份有限公司 | Grease lubrication main shaft system |
| CN105965039A (en) * | 2016-06-29 | 2016-09-28 | 科德数控股份有限公司 | High-speed rotary joint and using method thereof |
| CN109317701A (en) * | 2018-11-12 | 2019-02-12 | 靖江斯贝得电机制造有限公司 | A kind of axial seal of electro spindle |
| CN114198237A (en) * | 2021-12-28 | 2022-03-18 | 南方电网调峰调频发电有限公司鲁布革水力发电厂 | Main shaft sealing device of mixed-flow water turbine |
| CN116241723A (en) * | 2022-12-29 | 2023-06-09 | 北方矿业有限责任公司 | A New Composite Sealing Device Suitable for Mill Feed End |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING JINGDIAO PRECISION MACHINERY MANUFACTURE C Free format text: FORMER OWNER: BEIJING JINGDIAO TECHNOLOGY CO., LTD. Effective date: 20101115 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 102308 NO.10, YONG'AN ROAD, SHILONG INDUSTRIAL ZONE, MENTOUGOU DISTRICT, BEIJING TO: 102308 NO.8, YONG'AN ROAD, SHILONG INDUSTRIAL ZONE, MENTOUGOU DISTRICT, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101115 Address after: 102308 No. 8, Yongan Road, Shilong Industrial District, Mentougou, Beijing Patentee after: Beijing Jingdiao Precision Machinery Manufacturing Co., Ltd. Address before: 102308 Yongan Road, Beijing District of Mentougou City Shilong Industrial Zone No. 10 Patentee before: Beijing Jingdiao Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080227 |
|
| CX01 | Expiry of patent term |