CN104061317B - Gear reduction unit high speed shaft non-contacting seal device - Google Patents

Gear reduction unit high speed shaft non-contacting seal device Download PDF

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Publication number
CN104061317B
CN104061317B CN201410334630.2A CN201410334630A CN104061317B CN 104061317 B CN104061317 B CN 104061317B CN 201410334630 A CN201410334630 A CN 201410334630A CN 104061317 B CN104061317 B CN 104061317B
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China
Prior art keywords
ring
speed shaft
cover
housing
gear reduction
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CN201410334630.2A
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Chinese (zh)
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CN104061317A (en
Inventor
曹堪洲
范刚华
徐涛
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JIANGSU JINWO MACHINERY CO Ltd
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JIANGSU JINWO MACHINERY CO Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/029Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness

Abstract

The invention discloses a kind of gear reduction unit high speed shaft non-contacting seal device, comprise high speed shaft, sealing ring, transparent cover, stationary ring, rotating ring, drain pan, bearing and bearing holder (housing, cover), its middle (center) bearing is installed in bearing holder (housing, cover), transparent cover is fixed on the outer end of bearing holder (housing, cover) and has the lower edge that stretches into bearing holder (housing, cover), between lower edge and bearing, be pressed with stationary ring, the rotating ring that is connected on high speed shaft, stationary ring and rotating ring form axial labyrinth; Sealing ring is connected on high speed shaft, on the periphery wall of sealing ring, have annular groove, the opening of sealing ring and transparent cover forms radial labyrinth, between radial labyrinth and axial labyrinth, has cavity, on the inwall of lower edge and bearing holder (housing, cover), have axial drain pan, drain pan is communicated with cavity and box house. Frame for movement of the present invention is simple, easily processes and assembles, and cost is low, and can realize reliable sealing effectiveness.

Description

Gear reduction unit high speed shaft non-contacting seal device
Technical field
The present invention relates to a kind of shaft sealer, be specifically related to a kind of gear reduction unit high speed shaft non-contacting seal device.
Background technology
ToothWheel reductor is widely used as gear drive, by different gear reduction ratio parameter designing, reaches the running rotating speed requirement of driven operating mechanism. Its power shaft is general is connected driving with motor (or hydraulic motor etc.) original machine output shaft by shaft coupling, and rotating speed is higher, is generally called high speed shaft.
High speed shaft is supported by bearings at both ends, bearing adopts oil lubrication, for preventing oil leak, need sealing mechanism with original machine output shaft link, the contact seal that hermetically-sealed construction generally adopts rubber rotating seal ring (oil sealing) and high speed shaft to form, or disc and rubber rotating seal ring (oil sealing) combination sealing mode.
In gear reduction unit operation process, often because of the quality of rubber rotating seal ring (oil sealing) own, reliable life and installation question, cause seal failure and leak. And rubber rotating seal ring was in the time losing efficacy necessary replacing, need dismounting half a coupler (shaft coupling is is generally connected and composed by two half a couplers), limited by installing space, take gear reduction box apart, high speed shaft is split out to rear maintenance, or mobile motor (prime mover), just can complete more and change jobs. Cause the workload of replacing larger, maintenance time is long, and can cause shutdown loss.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of high durability, non-maintaining gear reduction unit high speed shaft non-contacting seal device.
Technical scheme: for solving the problems of the technologies described above, gear reduction unit high speed shaft non-contacting seal device provided by the invention comprises high speed shaft, bearing, bearing holder (housing, cover) and transparent cover, described bearing holder (housing, cover) is fixed on gear reduction box body, described bearing is installed in bearing holder (housing, cover), described transparent cover is fixed on the outer end of bearing holder (housing, cover), and described transparent cover has the lower edge that stretches into bearing holder (housing, cover), between described lower edge and bearing, is pressed with stationary ring, the rotating ring that is connected on described high speed shaft, described stationary ring and rotating ring form axial labyrinth; Sealing ring is connected on described high speed shaft, on the periphery wall of described sealing ring, there is annular groove, the opening of described sealing ring and transparent cover forms radial labyrinth, between described radial labyrinth and axial labyrinth, there is cavity, on the inwall of described lower edge and bearing holder (housing, cover), have axial drain pan, described drain pan is communicated with cavity and box house.
The present invention further improves, described rotating ring comprises upper ring body and lower ring body, the external diameter of described upper ring body is greater than the external diameter of described sealing ring, between the outer edge of described upper ring body and described lower edge, there is the first gap, the lower surface of described upper ring body has the second gap between the upper surface of described stationary ring, between the outer surface of described lower ring body and the endoporus of stationary ring, have third space, described axial labyrinth is made up of the first gap, the second gap and third space.
It is that described rotating ring has internal thread, has the external screw thread mating with internal thread on described high speed shaft that the present invention further improves.
It is that described sealing ring and high speed shaft are interference fit or interference fits that the present invention further improves.
It is that described annular groove is parallel equally spaced 3 that the present invention further improves again.
Beneficial effect: the present invention adopts radial labyrinth and axial labyrinth to form two contactless hermetically-sealed constructions by the present invention; and by drain pan, cavity is between the two communicated with box house; frame for movement is simple; easily processing and assembling; cost is low; and can realize reliable sealing effectiveness, and can realize non-maintaining work, while avoiding because of rubber rotating seal ring (oil sealing) seal failure, change the shutdown loss causing. The significant difference of further utilizing radial labyrinth and axial labyrinth linear velocity, progressively declines pressure from inside to outside, allows drain pan possess the flow tendency of ecto-entad, can effectively stop lubricating oil to external diffusion.
The technical problem that solves except the present invention recited above, form the technical characterictic of technical scheme and the advantage brought by the technical characterictic of these technical schemes, the advantage that the other technologies feature comprising in other technologies problem that gear reduction unit high speed shaft non-contacting sealing structure of the present invention can solve, technical scheme and these technical characterictics bring, is described in more detail in connection with accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the installation diagram of Fig. 1;
Fig. 4 is the use state diagram of Fig. 1.
Detailed description of the invention
Embodiment: the gear reduction unit high speed shaft non-contacting seal device of the present embodiment as depicted in figs. 1 and 2, comprises half a coupler 1, key 2, high speed shaft 3, sealing ring 4, transparent cover 5, stationary ring 6, rotating ring 7, drain pan 8, gear reduction box body 9 and bearing holder (housing, cover) 10. Half a coupler 1 is fixedly connected on the input of high speed shaft 3 by key 2, bearing holder (housing, cover) 10 is fixed on gear reduction box body 9. High speed shaft 3 is through the opening in transparent cover 3, and sealing ring 4 external cylindrical surfaces have multiple tracks ring-shaped groove, adopts interference fit or interference fits to be loaded on high speed shaft 3. Transparent cover 5 is by bolted in the outer face of bearing holder (housing, cover) 10, and the perforate radial fit gap in sealing ring 4 and transparent cover 5 is less, forms labyrinth seal structure radially. Stationary ring 6 is plate-like, is loaded between the lower edge and outer race of transparent cover 5. Rotating ring 7 is also plate-like, is tightened on high speed shaft 3 and is pressed against bearing inner ring end face by being threaded. The axial adjacent face of stationary ring 6 and rotating ring 7 forms less gap, forms axial labyrinth seal structure. Between labyrinth seal structure radially and axial labyrinth seal structure, have a cavity, on the lower edge of transparent cover 5 and the inwall of bearing holder (housing, cover), have axial drain pan 8, this drain pan 9 is communicated to cavity in gear reduction box body 9.
When assembling, as shown in Figure 3, first bearing is arranged between bearing holder (housing, cover) 10 and high speed shaft 3, then stationary ring 6 is pressed in bearing holder (housing, cover) 10, makes the outer shroud of its root edge against bearing, recycling screw thread by rotating ring 7 spinnings on high speed shaft 3, sealing ring 4 is also installed on high speed shaft, transparent cover 5 is finally installed, and the fluting aliging on transparent cover 5 and bearing block 10, the drain pan 8 connecting formed. After above-mentioned hermetically-sealed construction assembling, utilize key 2 that half a coupler 1 is arranged on to high speed shaft 3 inputs.
When use, as shown in Figure 4, said gear reductor high speed shaft non-contacting seal device is installed between the high speed shaft 3 and casing 9 of twin-screw impregnator gear reduction unit, prime mover adopts motor, and motor output shaft adopts crown gear coupling to be connected with high speed shaft. When equipment operation, sealing ring rotates with the axis, and form labyrinth seal structure A radially with static transparent cover, the rotating ring of stationary ring and rotation forms axial labyrinth seal structure B, corresponding bearing holder (housing, cover) and transparent cover bottom have drain pan, and two-in-series hermetically-sealed construction A, B and drain pan complete seal oil jointly.
Sealing principle: first, the less labyrinth gap of utilizing the axial adjacent face of rotating ring of stationary ring and rotation to form realizes sealing; When the lubricating oil leaking by above-mentioned hermetically-sealed construction leaks again, because sealing ring and transparent cover have radially formed less gap, need by the passage of the throttle clearance on many sealing ring external cylindrical surfaces and expansion cavity composition, can produce very large energy loss through throttling repeatedly, fluid head greatly declines, and makes fluid be difficult to leak; Lubricating oil between two-in-series hermetically-sealed construction is back in machine by the drain pan on gear reduction box body, and two-in-series hermetically-sealed construction and drain pan are realized sealing effectiveness jointly.
Below by reference to the accompanying drawings embodiments of the present invention are described in detail, but the present invention is not limited to described embodiment. For those of ordinary skill in the art, in the scope of principle of the present invention and technological thought, these embodiments are carried out to embodiment and carry out multiple variation, amendment, replacement and modification and still fall within the scope of protection of the present invention.

Claims (5)

1. a gear reduction unit high speed shaft non-contacting seal device, comprise high speed shaft, bearing, bearing holder (housing, cover) and transparent cover, described bearing holder (housing, cover) is fixed on gear reduction box body, described bearing is installed in bearing holder (housing, cover), described transparent cover is fixed on the outer end of bearing holder (housing, cover), it is characterized in that: described transparent cover has the lower edge that stretches into bearing holder (housing, cover), between described lower edge and bearing, is pressed with stationary ring, the rotating ring that is connected on described high speed shaft, described stationary ring and rotating ring form axial labyrinth; Sealing ring is connected on described high speed shaft, on the periphery wall of described sealing ring, there is annular groove, the opening of described sealing ring and transparent cover forms radial labyrinth, between described radial labyrinth and axial labyrinth, there is cavity, on the inwall of described lower edge and bearing holder (housing, cover), have axial drain pan, described drain pan is communicated with cavity and box house; Described radial labyrinth is poor with the linear differential mineralization pressure in axial labyrinth, and lubricating oil ecto-entad in drain pan is flowed.
2. gear reduction unit high speed shaft non-contacting seal device according to claim 1, it is characterized in that: described rotating ring comprises upper ring body and lower ring body, the external diameter of described upper ring body is greater than the external diameter of described sealing ring, between the outer edge of described upper ring body and described lower edge, there is the first gap, the lower surface of described upper ring body has the second gap between the upper surface of described stationary ring, between the outer surface of described lower ring body and the endoporus of stationary ring, have third space, described axial labyrinth is made up of the first gap, the second gap and third space.
3. gear reduction unit high speed shaft non-contacting seal device according to claim 1, is characterized in that: described rotating ring has internal thread on described high speed shaft, having the external screw thread mating with internal thread.
4. gear reduction unit high speed shaft non-contacting seal device according to claim 1, is characterized in that: described sealing ring and high speed shaft are interference fit or interference fits.
5. gear reduction unit high speed shaft non-contacting seal device according to claim 1, is characterized in that: described annular groove is parallel equally spaced 3.
CN201410334630.2A 2014-07-14 2014-07-14 Gear reduction unit high speed shaft non-contacting seal device Active CN104061317B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410334630.2A CN104061317B (en) 2014-07-14 2014-07-14 Gear reduction unit high speed shaft non-contacting seal device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410334630.2A CN104061317B (en) 2014-07-14 2014-07-14 Gear reduction unit high speed shaft non-contacting seal device

Publications (2)

Publication Number Publication Date
CN104061317A CN104061317A (en) 2014-09-24
CN104061317B true CN104061317B (en) 2016-05-25

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105370857A (en) * 2015-11-26 2016-03-02 綦江县三川齿轮有限公司 Sealing device of speed reducer
CN105370858A (en) * 2015-11-26 2016-03-02 綦江县三川齿轮有限公司 Speed reducer gear case capable of improving airtightness
CN105370851A (en) * 2015-11-26 2016-03-02 綦江县三川齿轮有限公司 Speed reducer
CN105387179A (en) * 2015-11-26 2016-03-09 綦江县三川齿轮有限公司 Speed reducer gearbox
CN105370852A (en) * 2015-11-26 2016-03-02 綦江县三川齿轮有限公司 Gearbox
CN105370859A (en) * 2015-11-26 2016-03-02 綦江县三川齿轮有限公司 Gearbox with sealing function
CN105370853A (en) * 2015-11-26 2016-03-02 綦江县三川齿轮有限公司 Speed reducer gearbox convenient to assemble
CN105422808A (en) * 2015-11-26 2016-03-23 綦江县三川齿轮有限公司 Gear case convenient to assemble
CN105370856A (en) * 2015-11-26 2016-03-02 綦江县三川齿轮有限公司 Gear case capable of improving airtightness
CN105333149A (en) * 2015-12-08 2016-02-17 米顿罗工业设备(上海)有限公司 Contactless sealing structure of high-speed shaft of plunger pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07280105A (en) * 1994-04-01 1995-10-27 Kubota Corp Non-contact type shaft seal device
CN102384249A (en) * 2011-11-10 2012-03-21 国茂减速机集团有限公司 Labyrinth sealing device for reducer
CN202493677U (en) * 2012-02-22 2012-10-17 沃德(天津)传动有限公司 Speed reducer and sealing device for same
CN203442143U (en) * 2013-07-11 2014-02-19 中信重工机械股份有限公司 Outwards-extending shaft end combined seal
CN203384380U (en) * 2013-08-19 2014-01-08 重庆钢铁(集团)有限责任公司 Straightening machine reducer high-speed shaft sealing structure
CN203560447U (en) * 2013-11-20 2014-04-23 北京南口轨道交通机械有限责任公司 Non-contact sealing structure for gearbox and gearbox
CN203560407U (en) * 2013-11-20 2014-04-23 北京南口轨道交通机械有限责任公司 Non-contact sealing structure for gearbox and gearbox
CN204004331U (en) * 2014-07-14 2014-12-10 江苏金沃机械有限公司 Gear reduction unit high speed shaft noncontact seal device

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