CN102734443A - Double spiral axial moving seal driving device - Google Patents
Double spiral axial moving seal driving device Download PDFInfo
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- CN102734443A CN102734443A CN2011100899447A CN201110089944A CN102734443A CN 102734443 A CN102734443 A CN 102734443A CN 2011100899447 A CN2011100899447 A CN 2011100899447A CN 201110089944 A CN201110089944 A CN 201110089944A CN 102734443 A CN102734443 A CN 102734443A
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Abstract
The invention discloses a double spiral axial moving seal driving device which comprises a box body, a driving shaft and a shaft gland which is sleeved on the driving shaft and is used for sealing the interior and exterior of the box body, wherein the driving shaft is positioned on a thread sealing shaft section formed on the inner side of the shaft gland, and the box body is provided with a thread shaft hole which is in clearance fit with the thread sealing shaft section; and the thread spread directions of the thread sealing shaft section and the thread shaft hole are the same with a rotation direction of the driving shaft from inside to outside. According to the invention, when the driving shaft rotates in high speed, the self pushing action of the thread sealing shaft section and the thread shaft hole is utilized, lubricating oil in the gap is pumped back to the box body, more lubricating oil is prevented from acting on an oil seal, and the burden of an oil seal is reduced; thus, the oil seal can select a softer material, the abrasion of the oil seal to the driving shaft is avoided, and the softer oil seal material has good flexibility, so as to avoid the discharge of the lubricating oil caused by the problem of assembly in an initial stage; and the double spiral axial moving seal driving device is suitable for using on a single steering driving device of the driving shaft.
Description
Technical field
The present invention relates to a kind of mechanical assembly, particularly a kind of mechanical device that is used for transmission.
Background technique
Transmission device is that motive force is passed to the middle device that next device is exported, and comprises gearbox, bearing housing etc.; It is the indispensable device of universal machine.Such as gearbox, can the high rotating speed of motor, motor be transmitted output through the back of slowing down, reach the purpose of use; Certainly, the transmission device of realizing speedup is arranged also, make according to demand in practice; Bearing housing is applicable to that mainly supporting drive shaft carries out transmission, and the stability of holding device operation certainly, also can form certain Bearing Installation space in the gearbox as required.
Transmission device generally comprises casing and transmission shaft, also has other parts according to the kind difference, such as gear etc.; Owing to be provided with high-speed rotary parts such as bearing, gear, for reducing friction, reducing rotational resistance, adopt lubricant oil to carry out lubricating between the friction pair, be one of necessary condition of device long-period stable operation.When rotatable parts ran up, the lubricant oil that can drive in the casing splashed, and the distribution and the lubrication friction that help lubricant oil are secondary; But because power is perhaps exported through the transmission shaft input, therefore, the lubricant oil motive sealing problem in the casing promptly is the subject matter that those skilled in the art faced.
In the existing technology, the outside framework oil seal form is generally adopted in the lubricant oil motive sealing of transmission device, can play the better seal effect; But outside framework oil seal particularly gets rid of in the transmission device under the bigger situation of oil mass because the long period friction can produce wearing and tearing, and a large amount of lubricant oil act on outside framework oil seal, add the pumping effect of transmission shaft itself, lubricant oil is produced leak; And outside framework oil seal owing to there is not break-in, also can cause the leakage of lubricant oil at the assembling initial stage; And, using in order to guarantee long period, the material require of outside framework oil seal has certain intensity, can produce wearing and tearing to transmission shaft itself, influences the performance of transmission shaft.
Therefore, need a kind of transmission device, its motive sealing is improved, can effectively avoid oil leak, and can use by long period, reduce maintenance frequency, practice thrift user cost.
Summary of the invention
In view of this, the purpose of this invention is to provide the transmission device of the axial motive sealing of a kind of double helix, oil leak can be effectively avoided in motive sealing, and can prolong its working life, reduces maintenance frequency, practices thrift user cost.
The transmission device of the axial motive sealing of double helix of the present invention; Comprise casing, transmission shaft and be enclosed within the axle envelope that is used to make the casing inner and outer sealing on the transmission shaft; Said transmission shaft is positioned at the inboard thread seal shaft part that forms of axle envelope; The screw thread axis hole of formation and thread seal shaft part Spielpassung on the casing, the screw thread expansion direction of the said thread seal shaft part sense of rotation with transmission shaft from inside to outside is identical, and the screw thread expansion direction of the screw thread axis hole sense of rotation with transmission shaft from inside to outside is identical.
And then in casing, it is inboard that said bearing is positioned at the screw thread axis hole through bearings for said transmission shaft;
And then said casing is provided with support rim vertically, and said screw thread axis hole is arranged at support rim, and the support rim arranged outside is used for the end cap of installation shaft envelope;
And then, support rim to casing between detachable the fixed connection;
And then said transmission device is speed changer or bearing housing;
And then said axle envelope is the skeleton rubber oil sealing.
The invention has the beneficial effects as follows: the transmission device of the axial motive sealing of double helix of the present invention; Be provided with in the oil sealing inboard thread seal shaft part and with the screw thread axis hole of its Spielpassung, and confirm the expansion direction of screw thread, when the transmission shaft high-speed rotation according to the sense of rotation of transmission shaft; Utilize the impetus of thread seal shaft part and screw thread axis hole itself; Make lubricant oil in the gap by in the blowback casing, prevent that the lubricant oil of a greater number from acting on oil sealing, reduce the oil sealing burden; Thereby oil sealing can be selected softer material, avoids the wearing and tearing of oil sealing to transmission shaft thus, and softer oil sealing material has adaptability preferably, avoids because the lubricant oil that the initial stage assembly problem causes leaks; The present invention is applicable to that the single transmission device that turns to of transmission shaft uses, and oil leak can be effectively avoided in motive sealing, and can prolong its working life, reduces maintenance frequency, practices thrift user cost.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Accompanying drawing is a structural representation of the present invention.
Embodiment
Accompanying drawing is a structural representation of the present invention; As shown in the figure: the transmission device of the axial motive sealing of double helix of present embodiment; Comprise casing 5, transmission shaft 1 and be enclosed within the axle envelope 8 that is used to make casing 5 inner and outer sealing on the transmission shaft 1; Said transmission shaft 1 is positioned at the axle envelope 8 inboard thread seal shaft parts 7 that form; The screw thread axis hole 3 of formation and thread seal shaft part 7 Spielpassung on the casing 5, the screw thread expansion direction of said thread seal shaft part 7 sense of rotation with transmission shaft 1 from inside to outside is identical, and the screw thread expansion direction of screw thread axis hole 3 sense of rotation with transmission shaft 1 from inside to outside is identical; Being meant from inside to outside by interior outside casing 5 here.
Owing to adopt worm structure; Lubricant oil pushes back in the casing under the threaded function of rotating, and reduces the lubricant oil through the gap contact seal; The lubricant oil that the thread seal shaft part throws away radially gets in the screw thread of screw thread axis hole; Under the prerequisite that the screw thread expansion direction is confirmed, lubricant oil can flow back to casing, prevents to leak; The present invention utilizes the pumping effect of the splash power and the transmission shaft itself of lubricant oil itself, prevents that lubricant oil from leaking, and alleviates the oil sealing load, prolongs the life cycle of motive sealing.
In the present embodiment, said transmission shaft 1 is supported in casing 5 through bearing 6, and said bearing 6 is positioned at screw thread axis hole 3 inboards; Utilize bearing lubrication, assurance device is stablized long-term operation.
In the present embodiment; Said casing 5 is provided with outward extending vertically support rim 4; Said screw thread axis hole 3 is arranged at support rim 4; Support rim 4 arranged outside are used for the end cap 2 of installation shaft envelope 8, and as shown in the figure, end cap 2 is through bolt or the detachable outside end face that is arranged at support rim 4 of screw; Utilize support rim can effectively guarantee the coaxality and the stability of strutting system of transmission shaft; Guarantee that simultaneously the thread seal shaft part has enough installing spaces; Make whole apparatus structure compact, support rim forms the balanced support structure that is positioned at the casing outside, is beneficial to assurance device stable operation.
In the present embodiment, said transmission device is speed changer or bearing housing; Present embodiment adopts gearbox.
In the present embodiment, the detachable fixed connection between said support rim 3 and the casing 5, as shown in the figure, adopt screw or through bolt to connect, the static seal pad can be set, reach using effect preferably; For convenience detach and the installation of this structure, simple and compact for structure, easy to make, assembling and installation efficiency are high.
In the present embodiment, said axle envelope 8 be the skeleton rubber oil sealing, and cost is lower, and material has softer characteristic, can be adapted to the geometrical defect of transmission shaft existence itself preferably, reaches the better seal effect; Certainly, owing to have the double helix sealing configuration, the axle envelope also can adopt the structure of soft packing seal commonly used, can when static, realize the better seal effect, owing to the double helix effect, also can reach the better seal effect during rotation.
Explanation is at last; Above embodiment is only unrestricted in order to technological scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technological scheme of the present invention; And not breaking away from the aim and the scope of technological scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (6)
1. the transmission device of the axial motive sealing of double helix; Comprise casing, transmission shaft and be enclosed within the axle envelope that is used to make the casing inner and outer sealing on the transmission shaft; It is characterized in that: said transmission shaft is positioned at the inboard thread seal shaft part that forms of axle envelope; The screw thread axis hole of formation and thread seal shaft part Spielpassung on the casing, the screw thread expansion direction of the said thread seal shaft part sense of rotation with transmission shaft from inside to outside is identical, and the screw thread expansion direction of the screw thread axis hole sense of rotation with transmission shaft from inside to outside is identical.
2. the transmission device of the axial motive sealing of double helix according to claim 1 is characterized in that: in casing, it is inboard that said bearing is positioned at the screw thread axis hole through bearings for said transmission shaft.
3. the transmission device of the axial motive sealing of double helix according to claim 2; It is characterized in that: said casing is provided with outward extending vertically support rim; Said screw thread axis hole is arranged at support rim, and the support rim arranged outside is used for the end cap of installation shaft envelope.
4. the transmission device of the axial motive sealing of double helix according to claim 3 is characterized in that: the detachable fixed connection between said support rim and the casing.
5. the transmission device of the axial motive sealing of double helix according to claim 4 is characterized in that: said transmission device is speed changer or bearing housing.
6. the transmission device of the axial motive sealing of double helix according to claim 5 is characterized in that: said axle envelope is the skeleton rubber oil sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100899447A CN102734443A (en) | 2011-04-11 | 2011-04-11 | Double spiral axial moving seal driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100899447A CN102734443A (en) | 2011-04-11 | 2011-04-11 | Double spiral axial moving seal driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102734443A true CN102734443A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100899447A Pending CN102734443A (en) | 2011-04-11 | 2011-04-11 | Double spiral axial moving seal driving device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102734443A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878299A (en) * | 2012-10-19 | 2013-01-16 | 无锡京华重工装备制造有限公司 | Sealing structure of rotating main shaft |
| CN104776208A (en) * | 2015-03-04 | 2015-07-15 | 盐城工学院 | Gear shaft speed reducer |
| CN105065673A (en) * | 2015-07-16 | 2015-11-18 | 江苏航天水力设备有限公司 | Double-thread sealing device of water pump turbine |
| CN107701704A (en) * | 2017-11-13 | 2018-02-16 | 湖州铭腾电力工程科技有限公司 | Decelerator combination dynamic sealing device |
| CN108167444A (en) * | 2018-02-11 | 2018-06-15 | 江西亿丰精密铸造有限公司 | A kind of sand mixer gland seal system |
| CN112228540A (en) * | 2020-11-04 | 2021-01-15 | 福建中维动力科技股份有限公司 | Lubricating and sealing structure of speed regulation assembly of electric heavy truck |
| CN112913630A (en) * | 2020-10-13 | 2021-06-08 | 山东弈腾机电设备有限公司 | Transmission mechanism of hand-held miniature tree mover |
-
2011
- 2011-04-11 CN CN2011100899447A patent/CN102734443A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878299A (en) * | 2012-10-19 | 2013-01-16 | 无锡京华重工装备制造有限公司 | Sealing structure of rotating main shaft |
| CN104776208A (en) * | 2015-03-04 | 2015-07-15 | 盐城工学院 | Gear shaft speed reducer |
| CN105065673A (en) * | 2015-07-16 | 2015-11-18 | 江苏航天水力设备有限公司 | Double-thread sealing device of water pump turbine |
| CN107701704A (en) * | 2017-11-13 | 2018-02-16 | 湖州铭腾电力工程科技有限公司 | Decelerator combination dynamic sealing device |
| CN108167444A (en) * | 2018-02-11 | 2018-06-15 | 江西亿丰精密铸造有限公司 | A kind of sand mixer gland seal system |
| CN112913630A (en) * | 2020-10-13 | 2021-06-08 | 山东弈腾机电设备有限公司 | Transmission mechanism of hand-held miniature tree mover |
| CN112913630B (en) * | 2020-10-13 | 2022-09-16 | 山东樵匠机电科技有限公司 | Transmission mechanism of hand-held miniature tree mover |
| CN112228540A (en) * | 2020-11-04 | 2021-01-15 | 福建中维动力科技股份有限公司 | Lubricating and sealing structure of speed regulation assembly of electric heavy truck |
| CN112228540B (en) * | 2020-11-04 | 2023-01-06 | 福建中维动力科技股份有限公司 | Lubricating and sealing structure of speed regulation assembly of electric heavy truck |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121017 |