CN102996776A - Grease lubricated large star wheel gearbox for bearing - Google Patents
Grease lubricated large star wheel gearbox for bearing Download PDFInfo
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- CN102996776A CN102996776A CN2012104083112A CN201210408311A CN102996776A CN 102996776 A CN102996776 A CN 102996776A CN 2012104083112 A CN2012104083112 A CN 2012104083112A CN 201210408311 A CN201210408311 A CN 201210408311A CN 102996776 A CN102996776 A CN 102996776A
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Abstract
The invention relates to the technical field of speed reducers with small teeth difference and in particular relates to a grease lubricated large star wheel gearbox for a bearing. The gearbox comprises a base and an involute transmission part with small teeth difference in the base. The gearbox is characterized in that an input shaft is supported in a fixing bracket by sealed bearings; planet gears on the two sides are supported on eccentric bushings by two sealed bearings respectively; an intermediate planet gear is supported on an eccentric bushing by four sealed bearings; the three kinds of planet gears are provided with sealed bearings in the same specification inside; the two ends of a pin are respectively supported in inner holes of the two side walls of the fixing bracket by left and right sealed bearings; first and second small eccentric bushings on the pin are supported in pin holes of the planet gears by sealed bearings; an intermediate small eccentric bushing is supported in a pin hole of the intermediate planet gear by four sealed bearings; the sixth, seventh and eighth sealed bearings are in the same specification; an output shaft is supported in an inner hole of the base by first and second bearings with space rings; and a sealing part is arranged on the two sides of the first and second bearings respectively. The gearbox has the beneficial effects that the bearing runs reliably, so the speed reducer has long service life and low noise.
Description
Technical field the present invention relates to involute less tooth difference braking technique field, and a kind of bearing large-scale star-wheel gear-box of grease lubrication, support internal gear are lubricated with gear oil, rolling bearing is lubricated with bearing grease.
Background technique JB/T8712-1998 planetary-gear speed reducer is involute less tooth difference: 1. ring gear output; 2. pin axle type output mechanism pin changes double-eccentric shaft into, and four selfaligning roller bearings are housed on the axle, is called the rolling star-wheel.Planetary-gear speed reducer existing problems: gear oil owing to sliding friction, can make oil very fast dirty when lubricating bearings is with gear at the same time, and damage of bearings causes the left alone without help machine of retarder.
" the destruction reasons and management method of mine speed reducer " pointed out: " decelerator trouble accounts for 40% in the coal mine equipment fault.Bearing is the in addition part that is very easy in the retarder damage.The bearing mode of failure: bearing scratches, bearing is adhered, bearing is invaded impurity, retainer fracture etc.Reason: large granular impurity content is higher in the lubricant oil, increases the weight of the bearing wear degree.”
" Fatigue failure of heavy-duty gear surface and prevention " pointed out: " the bearing wheels tooth surface is bearing multi-form effect of stress everywhere; the flank of tooth and subcutaneous metal may produce fine crack and form tired source; stress-number of cycles increases thereupon; crackle will constantly be expanded so that be connected with each other and form biscuit metal and come off; the flank of tooth spot corrosion occurs and peels off, and gear teeth face produces fatigue damage.”
(1) the high basic reason of bearing fault rate:
" insufficient lubrication is the main cause that causes the bearing early damage " (891 pages of Liu Zejiu " rolling bearing application manual ")
" ... bearing early failue often is not the fatigue ruption that material causes, but pollutant enter bearing inside afterwards lubricated lipid degenerate gradually, produce due to the impression at the rolling surface of contact." (" sealing technique of seal deep groove ball bearing " bearing 2009.05)
Radial ball bearing contact stress σ max=5000Mpa (р. д. not prompt Germania " 134 pages of rolling bearing handbook) be gear pair σ max=1450Mpa 3-4 doubly, so the turbidity test of bearing grease (oil) should be far above the lubricant oil of gear.
(a) Shanghai Machinery College " Fundamentals of Machine Design " is upper 103 pages: " pull down after gear transmission equipment use a period of time and can find that wear trace appears in tooth surface; lubricating under relatively poor or the impure condition of lubricant oil especially; wear phenomenon is more obvious; the wearing and tearing of gear teeth root are serious than the top, the small gear wearing and tearing are serious than gearwheel again.Wearing and tearing are owing to having active force and relative sliding to cause between the surface of contact.Relative sliding length Δ S has been arranged between flank profil, shown that flank profil will wear and tear.”
(b) " 94 pages of Gear Transmission Design handbook: in the power gear transmission, tooth surface is because skimming wear, burn into are overheated etc., thereby flank of tooth loss to occur be inevitable for Zhu Xiaolu;
(2) require in theory bearing with grease lubrication (or not containing additive mineral oil), the gear additive lubricating oil:
(a) Liu Zejiu " rolling bearing application manual " is 893 pages: " when run up or high temperature under the bearing of working, in the time can't using grease lubrication or bearing contiguous part (such as gear) is when using oil lubrication in addition, bearing is just used oil lubrication." 921 pages: " ... the lubricated general mineral oil with not containing additive of rolling bearing ";
(b) Zhu Xiaolu " 1087 pages of Gear Transmission Design handbook: be in the gear under the boundary lubrication condition, should use the lubricant oil that contains extreme pressure anti-wear additives (additive).
SH/T0017-1990 L-FC Grade A bearing oil kinematical viscosity is 90-100; Be that 288-352 is much smaller than gear oil viscosity.
Conclusion: gear-box, the basic reason that the bearing fault rate is high are with gear oil while oilgear and rolling bearing.
[summary of the invention] the object of the invention provides a kind of bearing large-scale star-wheel gear-box of grease lubrication of long service life.
[technological scheme] input shaft is bearing in the fixing frame with two first and second stuffing box bearings, the first row star-wheel is bearing on the first eccentric bushing with two the 3rd stuffing box bearings, described middle planetary wheel is bearing on the middle eccentric bushing with four the 4th stuffing box bearings, described the second planet wheel is bearing on the second eccentric bushing with two the 5th stuffing box bearings, third and fourth and five be same specification stuffing box bearing; The pin two ends are bearing in fixing frame two side endoporus with left and right stuffing box bearing respectively, the first small eccentricity is applied mechanically two the 6th stuffing box bearings and is bearing in the first row star-wheel pin-and-hole on the pin, middle small eccentricity is applied mechanically four the 7th stuffing box bearings and is bearing in the middle planetary wheel pin-and-hole, the second small eccentricity is applied mechanically two the 8th stuffing box bearings and is bearing in the second planet wheel pin-and-hole, and the 6th, seven and eight is same specification stuffing box bearing; Output shaft is with being bearing in the support endoporus with first, second bearing with spacer ring, and respectively there is a Sealing first, second bearing both sides.
Stuffing box bearing is contact-type radial seal bearing, and such as RK or RS or HMS (A) or MHS (A) type, described Sealing is rotary shaft lip seal or Che Shi combination seal.The feasibility of grease lubricating bearing is presented below:
1. Ai Siman " rolling bearing design and application manual " is 221 pages: " when compact structure, preferably use the radial ball bearing that the two sides sealing is housed.The radial ball bearing that the two sides seal ring the is housed lubricating grease of the whole life time of enough bearings of having packed into.”
2. Bu Yan " 95 pages of practical bearing technology handbook: " and those compact structures, axial dimension require little, seal request strict, safeguard the repairing difficulty, the place of additional seal device is adopted in inconvenience, can preferentially select stuffing box bearing.”
3. Liu Ze nine " rolling bearing application manual " is 593 pages: " stuffing box bearing both can have an excellent sealing to lubricate environment, also saved complicated lubrication system simultaneously.So at compact structure, the strict position of seal request, all stuffing box bearing is used in suggestion.”
" 1096 pages of Gear Transmission Design handbook: " gear lubricant and gear and other are parts the same working life that it is arranged in addition, and the working life of oil product is closely related with applying working condition and maintenance technology again for Zhu Xiaolu.General industry gear normal operation 2500h. or must change oil in 6 months." 913 pages of Liu Zejiu " rolling bearing application manual ": it is as follows to change fat cycle empirical correlation:
T＝1.475·10
6K
-0.9908-1.025·10
6K
-0.8626(h.)
In the formula: COEFFICIENT K=K
fNDm (rmm/s) (ball bearing K
f=0.9-1.1), Dm=(D+d)/2, result of calculation: stuffing box bearing change fat cycle＞2500 (h.), thereby proved packed into the lubricating grease of the whole life time of enough bearings of stuffing box bearing.
Motor n
1=1000rpm, NAD:i=6.3, n=158.7rpm, NBD:i=40, n=25rpm change the fat cycle
[beneficial effect] technique effect is that bearing operation is reliable, thereby retarder long service life, noise are low.
[description of drawings] Fig. 1. embodiment of the invention structural representation
[embodiment] encyclopaedizes the present invention below in conjunction with accompanying drawing:
With reference to Fig. 1. a kind of bearing large-scale star-wheel gear-box of grease lubrication, comprise support 1 and be contained in Involute Small Teeth Difference Planetary Gearing spare in the support 1, described Involute Small Teeth Difference Planetary Gearing spare comprises the first row star-wheel 101, middle planetary wheel 22, the second planet wheel 102, input shaft 15, be contained in successively the first eccentric bushing 171 of input shaft 15 shaft extension ends, middle eccentric bushing 16 and the second eccentric bushing 172, uniform pin 11, output shaft 4, the ring gear 9 and the fixing frame 18 that connect with output shaft 4 disks, described both sides first, the second planet wheel 101,102 with middle planetary take turns 180 ° of 22 phase differences, described both sides first, the second planet wheel 101,102 uniform thickness, its thickness is half of middle planetary wheel 22, the first small eccentricity cover 191 is housed on the described pin 11 successively, middle small eccentricity cover the 20 and second small eccentricity cover 192, described both sides first, the second small eccentricity cover 191,192 with middle small eccentricity overlap 180 ° of 20 phase differences, three eccentric bushings 171 on the described input shaft 15,16, three small eccentricities cover 191 on 172 throw of eccentric and the pin 11,20,192 throw of eccentric all equate, described fixing frame 16 is connected on the support 1 input end end face, it is characterized in that:
Two first, second stuffing box bearings 141,142 of described input shaft 15 usefulness are bearing in fixing frame 18 endoporus, two the 3rd stuffing box bearings 131 of described the first row star-wheel 101 usefulness are bearing on the first eccentric bushing 171, four the 4th stuffing box bearings 12 of described middle planetary wheel 22 usefulness are bearing on the middle eccentric bushing 16, two the 5th stuffing box bearings 132 of described the second planet wheel 102 usefulness are bearing on the second eccentric bushing 172, described third and fourth and five be identical stuffing box bearing;
Described pin 11 two ends are bearing in fixing frame 18 two side endoporus with left and right stuffing box bearing 72,71 respectively, two the 6th stuffing box bearings 81 of the first small eccentricity cover 191 usefulness are bearing in the first row star-wheel 101 pin-and-holes on the described pin 11, four the 7th stuffing box bearings 21 of described middle small eccentricity cover 20 usefulness are bearing in middle planetary and take turns in 22 pin-and-holes, two the 8th stuffing box bearings 82 of described the second small eccentricity cover 192 usefulness are bearing in the second planet wheel 102 pin-and-holes, and described the 6th, seven and eight is identical stuffing box bearing;
Described output shaft 4 usefulness are bearing in support 1 endoporus with first, second bearing 2,5 with spacer ring, and respectively there is a Sealing 3,6 described first, second bearing 2,5 both sides;
Described stuffing box bearing is contact-type radial seal bearing, and such as RK or RS or HMS (A) or MHS (A) type, described Sealing is rotary shaft lip seal or Che Shi combination seal; Described stuffing box bearing is contact-type radial seal bearing, such as RK or RS or HMS (A) or MHS (A) type, described Sealing is rotary shaft lip seal or Che Shi combination seal (Cheng Daxian " mechanical design handbook " volume 3-10-269,300 pages);
" self seal of bearing is divided into contact-type and noncontact seal by structural type.Can be divided into radial seal and axial seal by contact-type.Structure by seal ring can be divided into single lip seal and double-lip seal." (593 pages of Liu Zejiu " rolling bearing application manual ")
Claims (1)
1. a bearing is with the large-scale star-wheel gear-box of grease lubrication, comprise support (1) and be contained in the interior Involute Small Teeth Difference Planetary Gearing spare of support (1), described Involute Small Teeth Difference Planetary Gearing spare comprises the first row star-wheel (101), middle planetary wheel (22), the second planet wheel (102), input shaft (15), be contained in successively first eccentric bushing (171) of input shaft (15) shaft extension end, middle eccentric bushing (16) and the second eccentric bushing (172), uniform pin (11), output shaft (4), the ring gear (9) and the fixing frame (18) that connect with output shaft (4) disk, described both sides first, the second planet wheel (101,102) with 180 ° of middle planetary wheel (22) phase differences, described both sides first, the second planet wheel (101,102) uniform thickness, its thickness is half of middle planetary wheel (22), the first small eccentricity cover (191) is housed on the described pin (11) successively, middle small eccentricity cover (20) and the second small eccentricity cover (192), described both sides first, the second small eccentricity cover (191,192) with 180 ° of middle small eccentricity cover (20) phase differences, three eccentric bushings (171 on the described input shaft (15), 16,172) three small eccentricity covers (191 on throw of eccentric and the pin (11), 20,192) throw of eccentric all equates, described fixing frame (16) is connected on support (1) the input end end face, it is characterized in that:
Described input shaft (15) is with two first, the second stuffing box bearing (141,142) be bearing in fixing frame (18) endoporus, described the first row star-wheel (101) is bearing on the first eccentric bushing (171) with two the 3rd stuffing box bearings (131), described middle planetary wheel (22) is bearing on the middle eccentric bushing (16) with four the 4th stuffing box bearings (12), described the second planet wheel (102) is bearing on the second eccentric bushing (172) with two the 5th stuffing box bearings (132), and the described the 3rd, four and five is identical stuffing box bearing;
A left side is used respectively at described pin (11) two ends, right stuffing box bearing (72,71) be bearing in fixing frame (18) two side endoporus, upper the first small eccentricity cover (191) of described pin (11) is bearing in the first row star-wheel (101) pin-and-hole with two the 6th stuffing box bearings (81), small eccentricity cover (20) is bearing in middle planetary wheel (22) pin-and-hole with four the 7th stuffing box bearings (21) in the middle of described, described the second small eccentricity cover (192) is bearing in the second planet wheel (102) pin-and-hole with two the 8th stuffing box bearings (82), and the described the 6th, seven and eight is identical stuffing box bearing;
Described output shaft (4) is with being bearing in support (1) endoporus with first, second bearing (2,5) with spacer ring, and respectively there is a Sealing (3,6) described first, second bearing (2,5) both sides;
Described stuffing box bearing is contact-type radial seal bearing, and such as RK or RS or HMS (A) or MHS (A) type, described Sealing is rotary shaft lip seal or Che Shi combination seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408311.2A CN102996776B (en) | 2012-10-09 | 2012-10-09 | The large-scale star wheel gear box of bearing grease lubrication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408311.2A CN102996776B (en) | 2012-10-09 | 2012-10-09 | The large-scale star wheel gear box of bearing grease lubrication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102996776A true CN102996776A (en) | 2013-03-27 |
| CN102996776B CN102996776B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210408311.2A Active CN102996776B (en) | 2012-10-09 | 2012-10-09 | The large-scale star wheel gear box of bearing grease lubrication |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039091A (en) * | 1988-06-30 | 1990-01-24 | 湖南省机械研究所 | Mixed few-differential spider retarder and speed changer |
| US4896567A (en) * | 1987-07-18 | 1990-01-30 | Hunan Research Inst. Of Machinery | Planetary transmission mechanism and device of involute gears with complex minor tooth difference |
| CN2085446U (en) * | 1990-12-28 | 1991-09-25 | 湖南省机械研究所 | Internal intermeshing planet transmission |
| CN1062407A (en) * | 1990-12-15 | 1992-07-01 | 湖南省机械研究所 | A kind of internally engaged planetary driving machanism of new structure |
| CN1166578A (en) * | 1996-05-29 | 1997-12-03 | 湖南省机械研究所 | New-structure planetary-gear speed reducer and speed variator |
| CN2385148Y (en) * | 1999-08-02 | 2000-06-28 | 叶发忠 | Speed reducer |
| CN2511833Y (en) * | 2001-07-02 | 2002-09-18 | 湖南省机械研究所 | Planetary transmission |
-
2012
- 2012-10-09 CN CN201210408311.2A patent/CN102996776B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4896567A (en) * | 1987-07-18 | 1990-01-30 | Hunan Research Inst. Of Machinery | Planetary transmission mechanism and device of involute gears with complex minor tooth difference |
| CN1039091A (en) * | 1988-06-30 | 1990-01-24 | 湖南省机械研究所 | Mixed few-differential spider retarder and speed changer |
| CN1062407A (en) * | 1990-12-15 | 1992-07-01 | 湖南省机械研究所 | A kind of internally engaged planetary driving machanism of new structure |
| CN2085446U (en) * | 1990-12-28 | 1991-09-25 | 湖南省机械研究所 | Internal intermeshing planet transmission |
| CN1166578A (en) * | 1996-05-29 | 1997-12-03 | 湖南省机械研究所 | New-structure planetary-gear speed reducer and speed variator |
| CN2385148Y (en) * | 1999-08-02 | 2000-06-28 | 叶发忠 | Speed reducer |
| CN2511833Y (en) * | 2001-07-02 | 2002-09-18 | 湖南省机械研究所 | Planetary transmission |
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|---|---|
| CN102996776B (en) | 2016-06-22 |
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Inventor after: Wu Shengzhen Inventor after: Jia Wenguang Inventor before: Wu Shengzhen |
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Effective date of registration: 20160525 Address after: Yueqing City, Zhejiang Province, 325603 white town in Wenzhou City, Tian Yang Road No. 3 Applicant after: Chen Wei Address before: Whitehead street in Zhejiang County of Pingyang Province town of Kunyang 325400 Building No. 4 room 761 Applicant before: Wu Xiaojie |
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Effective date of registration: 20170704 Address after: 226000 Jiangsu Province, Nantong City Chongchuan District Gongnong Road No. 59 7 floor Patentee after: Nantong run Jia International Trading Co., Ltd. Address before: Yueqing City, Zhejiang Province, 325603 white town in Wenzhou City, Tian Yang Road No. 3 Patentee before: Chen Wei |
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Effective date of registration: 20200923 Address after: Song Ling Zhen Development Zone of Wujiang District of Suzhou city in Jiangsu province 215200 Jia Pu Bridge Patentee after: WUJIANG CITY MINFU CABLE ACCESSORIES FACTORY Address before: 226000 Jiangsu Province, Nantong City Chongchuan District Gongnong Road No. 59 7 floor Patentee before: NANTONG RUNJIA INTERNATIONAL TRADE Co.,Ltd. |