CN201177042Y - Combination type sealing structure for heavy-duty gear box high speed axis - Google Patents

Combination type sealing structure for heavy-duty gear box high speed axis Download PDF

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Publication number
CN201177042Y
CN201177042Y CNU2008200852961U CN200820085296U CN201177042Y CN 201177042 Y CN201177042 Y CN 201177042Y CN U2008200852961 U CNU2008200852961 U CN U2008200852961U CN 200820085296 U CN200820085296 U CN 200820085296U CN 201177042 Y CN201177042 Y CN 201177042Y
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CN
China
Prior art keywords
seal
oil
sealing
heavy
combined
Prior art date
Application number
CNU2008200852961U
Other languages
Chinese (zh)
Inventor
张萌
王聪
Original Assignee
宁波东力传动设备股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宁波东力传动设备股份有限公司 filed Critical 宁波东力传动设备股份有限公司
Priority to CNU2008200852961U priority Critical patent/CN201177042Y/en
Application granted granted Critical
Publication of CN201177042Y publication Critical patent/CN201177042Y/en

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Abstract

The utility model relates to a combined sealing structure used in a high-speed shaft of a heavy-duty gearbox, which is designed to solve the problem of sealing a heavy-duty high-speed shaft under abominable work conditions. The utility model comprises a main shaft, a bush arranged on the main shaft through interference fit, and a compound double seal arranged between the bush and an end enclosure and comprising a non-contact seal and a non-contact seal. A frame oil seal of the non-contact seal is pressed tightly between the bush and the end closure by a pressure plate; the sealing structure not only has the function of auxiliary sealing, but also has dustproof and waterproof functions. An oil gathering groove communicated with the return oil hole of the box body and a labyrinth sidestep are arranged at the juncture position of the bush and the end closure of the non-contact seal, forming an oil film clearance H. The compound double seal has the combined advantages of both sealing modes, overcomes the disadvantages of both and brings the advantages into play; the combined sealing structure is capable of bearing greater pressure difference between the interior and the exterior than a single frame oil seal, and has the advantages of low cost, long service life, good dustproof and waterproof performance, leakage prevention, environment optimization, etc., thereby better meeting the sealing requirement of the high-speed shaft of a heavy-duty gearbox under abominable work conditions.

Description

The combined seal structure that is used for overloading gear case high speed axis
Technical field
The utility model relates to a kind of gear-box sealing of spindles structure, relates in particular to the gearbox high-speed spindle combinations formula sealing configuration that is used for heavy duty.
Background technique
The gear-box main shaft sealing construction is realized contact seal with outside framework oil seal usually, the general static seal that claims, static seal is the elastic reaction by rubber, and the metal (as main shaft) of rotation is encircled, eliminate the gap between solid of rotation and retaining element, to lubricate oil catch in casing, be half a year the projected life of general seal ring, also bad at the sealing effect of low speed, high temperature, work under bad environment, need often to stop production maintenance, influence is produced, again because and exterior, dust, aqueous vapor easily enter box house.The skeleton oil seal of simple contact-type is owing to be by sealing with the axle mode of holding tightly, and its seal lip is very easy to wearing and tearing, also causes another short reason of working life.Also has a kind of motive sealing of adopting contactless labyrinth seal, motive sealing is will lubricate oil catch at box house by rotating ring (bag oil ring) and the stationary ring (drainage trough) that rotates, the effect of rotating ring is when disc rotates, and utilizes centrifugal action to get rid of away attached to the lubricant oil on the ring; The effect of stationary ring is by drainage trough lubricant oil to be drawn back in the case.The characteristics of this sealing are that disc works, when gear-box shuts down when gear-box is worked; disc is just inoperative, and the gear in the combination gear case, bearing are by forcing oil jet lubrication, in case shut down; oil level rises rapidly, the slit bleed between driven torus and stationary ring.Particularly for abominable, the of living in ambient temperature height of work condition environment, dust is many, aqueous vapor is big is used for the rolling mill of heavy duty, just expose its weakness, because input speed height, finish rolling district gear-box particularly, running continuously, go into place's bearing and adopt the thin oil pressure lubrication again, cause oil return herein insufficient or the sealing means structural design is unreasonable and cause seepage easily because of various reasons, cause environmental pollution.Simple contactless labyrinth seal is blocked oil circuit by getting rid of oily mode, owing to contactless, so can not wear and tear, but at oil inlet quantity easy seepage during excessive or state of rest.
Summary of the invention
Goal of the invention of the present utility model be to remedy the deficiencies in the prior art and provide a kind of take into account two kinds of sealing means advantages, reach complementary one, the effect of maximizing favourable factors and minimizing unfavourable ones, the combined seal structure that thoroughly improves seepage, optimize the environment in particular for overloading gear case high speed axis.
According to above-mentioned purpose, technical measures of the present utility model are:
A kind of combined seal structure that is used for overloading gear case high speed axis, comprise that main shaft, interference are fitted in lining on the main shaft, are installed in the sealing component between lining and the end cap, it is characterized in that described sealing component comprises contact seal and noncontact seal that the Composite Double resealing is formed.
Described contact seal is a skeleton oil seal, the opening of outside framework oil seal outwardly or opening inwardly.
Described noncontact seal is to be provided with oil-collecting ditch and the labyrinth step that is communicated with the casing spill port at the lining and the binding site of end cap, has formed oil clearance H.
Described oil-collecting ditch indentation is made up of straight flange and hypotenuse, and its angle is 45~60 °.
Described oil clearance H=0.2~0.5 millimeter.
The straight flange of described flexuose oil-collecting ditch is by the casing outside, the oblique box inside of hypotenuse.
Compared with prior art, the utility model has adopted outside framework oil seal contact seal and contactless labyrinth seal in the compound double sealing structure of one, therefore the advantage that also integrates two kinds of sealing means, make the deficiency complementation, it is poor to bear bigger external and internal pressure than simple skeleton oil seal, and with low cost, actual use condition is good, has long service life, dustproof and waterproof performance good, not easy to leak, characteristics such as optimize the environment.
Description of drawings
Fig. 1 is the utility model structural representation (left side is outside the casing, and the right side is in the casing).
Fig. 2 is the A place enlarged view of Fig. 1.
Embodiment
Embodiment to the utility model is elaborated again below with reference to accompanying drawing.
The combined seal structure that is used for overloading gear case high speed axis is referring to Fig. 1~2, the lining 5 of suit interference fit on main shaft 1, this lining adopts modified the forming of high-quality medium carbon alloy steel (42CrMo) material, surfaces nitrided processing, because this lining is handled through surface hardening, having isolated outside framework oil seal 3 again contacts with the direct of main shaft 1, can eliminate the premature wear that oil seal lip causes the main shaft surface, prevent that simultaneously lubricant oil is from seepage between them, being provided with of lining 5 is beneficial to the main shaft life-span improves, and the transposing lining is easier compared with the transposing main shaft, save more money.
Outside framework oil seal 3 is adopted in contact seal, is fixed and clamped between lining and end cap by pressing plate 2, forms the contact seal structure, the opening of outside framework oil seal 3 outwardly, sealing mainly plays the dustproof and waterproof effect, also plays the auxiliary seal effect simultaneously.Also have opening inwardly according to the different application occasion, mainly seal.
Contactless labyrinth seal is to be that the lining afterbody is provided with flexuose oil-collecting ditch 7 and labyrinth step 8 at rotating ring lining 5 with stationary ring end cap 4 binding sites, flexuose oil-collecting ditch 7 is made up of straight flange and hypotenuse, its angle is 45~60 °, the utility model straight flange is by the casing outside, the oblique box inside of hypotenuse, this labyrinth step has formed 0.2~0.5 millimeter oil clearance H, ingenious and end cap is formed mechanical labyrinth seal structure, the dynamic and static ring of sealing is formed by machining, guarantee dimensional accuracy, thereby the oil clearance H of dynamic and static ring can be very little, make main shaft 1 in operation process, be easy between them, form the oil film protective coating, stop most of lubricant oil to be rushed to outside framework oil seal 3 contact seals place, flexuose oil-collecting ditch 7 on the lining 5 can be collected less amount of lubrication oil and flow to straight flange from hypotenuse and enter the casing oil back chamber, and flows back in the casing by casing spill port 6.
Contact seal and non-contacting seal form the Composite Double resealing, reach complementary purpose, have both Advantage overcomes the shortcoming of simple sealing, has played the effect of maximizing favourable factors and minimizing unfavourable ones, and more can satisfy the work condition environment condition and dislike The bad seal request that is used for heavy-duty rolling mill gearbox high-speed main shaft has purified environmental pollution.

Claims (6)

1, a kind of combined seal structure that is used for overloading gear case high speed axis, comprise that main shaft (1), interference are fitted in lining (5) on the main shaft, are installed in the sealing component between lining (5) and the end cap (4), it is characterized in that described sealing component comprises contact seal and noncontact seal that the Composite Double resealing is formed.
2, the combined seal structure that is used for overloading gear case high speed axis according to claim 1 is characterized in that described contact seal is outside framework oil seal (3) sealing, the opening of outside framework oil seal outwardly or opening inwardly.
3, the combined seal structure that is used for overloading gear case high speed axis according to claim 1, it is characterized in that described noncontact seal is to be provided with oil-collecting ditch (7) and the labyrinth step (8) that is communicated with casing spill port (6) at the lining (5) and the binding site of end cap (4), has formed oil clearance H.
4, the combined seal structure that is used for overloading gear case high speed axis according to claim 3 is characterized in that described oil-collecting ditch (7) indentation, is made up of straight flange and hypotenuse, and its angle is 45~60 °.
5, the combined seal structure that is used for overloading gear case high speed axis according to claim 3 is characterized in that described oil clearance H=0.2~0.5 millimeter.
6, the combined seal structure that is used for overloading gear case high speed axis according to claim 4, the straight flange that it is characterized in that described flexuose oil-collecting ditch (7) is by the casing outside, the oblique box inside of hypotenuse.
CNU2008200852961U 2008-03-28 2008-03-28 Combination type sealing structure for heavy-duty gear box high speed axis CN201177042Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200852961U CN201177042Y (en) 2008-03-28 2008-03-28 Combination type sealing structure for heavy-duty gear box high speed axis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200852961U CN201177042Y (en) 2008-03-28 2008-03-28 Combination type sealing structure for heavy-duty gear box high speed axis

Publications (1)

Publication Number Publication Date
CN201177042Y true CN201177042Y (en) 2009-01-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200852961U CN201177042Y (en) 2008-03-28 2008-03-28 Combination type sealing structure for heavy-duty gear box high speed axis

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CN (1) CN201177042Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102278474A (en) * 2011-06-12 2011-12-14 鞍山重型矿山机器股份有限公司 Contact type dynamic sealing method and dynamic sealing device of dishing sealing ring
CN102840312A (en) * 2011-06-20 2012-12-26 特纳动力系统有限公司 Gearbox split sump
WO2013029538A1 (en) * 2011-08-29 2013-03-07 Shenzhen Byd Auto R&D Company Limited Wheel-speed sensor mounting device
CN104314823A (en) * 2014-10-31 2015-01-28 江苏泰隆减速机股份有限公司 Roots blower wallboard
CN104776203A (en) * 2015-03-04 2015-07-15 盐城工学院 Sealing structure of reducer input shaft
CN104819271A (en) * 2015-04-24 2015-08-05 盐城工学院 Vibration attenuation and vibration isolation type gearbox for input shaft and output shaft

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102278474A (en) * 2011-06-12 2011-12-14 鞍山重型矿山机器股份有限公司 Contact type dynamic sealing method and dynamic sealing device of dishing sealing ring
CN102840312A (en) * 2011-06-20 2012-12-26 特纳动力系统有限公司 Gearbox split sump
WO2013029538A1 (en) * 2011-08-29 2013-03-07 Shenzhen Byd Auto R&D Company Limited Wheel-speed sensor mounting device
US9310392B2 (en) 2011-08-29 2016-04-12 Byd Company Limited Wheel-speed sensor mounting device
CN104314823A (en) * 2014-10-31 2015-01-28 江苏泰隆减速机股份有限公司 Roots blower wallboard
CN104776203A (en) * 2015-03-04 2015-07-15 盐城工学院 Sealing structure of reducer input shaft
CN104776203B (en) * 2015-03-04 2017-08-15 盐城工学院 Reducer input shaft sealing structure
CN104819271A (en) * 2015-04-24 2015-08-05 盐城工学院 Vibration attenuation and vibration isolation type gearbox for input shaft and output shaft

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090107

Termination date: 20140328

C17 Cessation of patent right