CN103032278B - Wind-electricity constant braking cycloid pitch-variable gearbox - Google Patents

Abstract

The invention relates to the technical field of wind-electricity pitch-variable speed reduction. A wind-electricity constant braking cycloid pitch-variable gearbox comprises three parts, namely, a planet, a cycloid and a brake, and is characterized in that the cycloid is a rim and spoke assembling component; the middle gear thickness is two times of the thickness on two sides; a phase difference is 180 degrees; an eccentric bearing comprises a conical bearing and an eccentric sleeve; the brake comprises two sets of V-shaped slot plate mechanisms, a friction pair and a resetting spring; a conical plate in the friction pair is linked with a middle plate; a first driving V-shaped slot plate is linked on a rotor shaft; a steel ball is arranged between the first driving V-shaped slot plate and a driven V-shaped slot plate on one side of the middle plate; a second driven V-shaped slot plate is linked with an output shaft spline; a steel ball is also arranged between the second driven V-shaped slot plate and the driving V-shaped slot plate on the other side of the middle plate; and the friction pair is tightly pressed by the resetting spring. The wind-electricity constant braking cycloid pitch-variable gearbox has the beneficial effects: a brake torque is automatically increased following the increasing of a resisting moment; a single-stage speed reduction ratio is 143; the weight is light; the axial size is short; the cycloid gear teeth do not break; the transmission loading force is greater than that of an NGW with three planet gears; and the manufacturing cost is 45-55% lower.

Description

The permanent baking cycloid variable propeller gearbox of wind-powered electricity generation

[technical field] the present invention relates to wind electricity change paddle braking technique field, is that invention is improved in " three-disk cycloid single pitch-controlled speed reducer of wind turbine " (201010174471.6), the permanent baking cycloid variable propeller gearbox of a kind of wind-powered electricity generation.

The required high overload power of the variable propeller gearbox in [background technique] 70 meters of high-altitudes, high reliability and braking are very reliable." wind-power electricity generation and wind turbine gearbox general introduction " is pointed out: " the wind field gear-box spoilage had up to 40-50%, this is because be frequently subject under wind carries change impact condition, fretting wear causes the early stage spot corrosion of gear to exceed expected design." background technique is mainly third-level planetary structure:

1. Nanjing high gear company " variable propeller gearbox of wind power generator " (ZL200410064931);

2. Chongqing gear-box company " wind power generation variable oar reduction gear box " (200720188097);

3. Tianjin speed reducer company " the change oar gear reduction unit for wind-power electricity generation " (200720125070);

4. Hangzhou advance wind-powered electricity generation company " wind power generation variable oar reduction gear box " (200920116858);

5. group of ACE Semi " wind-power generating variable-propeller speed reducer " (200910034380).Existing problems:

(1) existing gear-box safety coefficient is lower, as BJJSQ1500A type third level planet wheel: S _h=1.21, S _f=1.37, cause early stage spot corrosion when thus bearing fatigue load.Easily there is microcrack in gear hobbing in addition, heat treatment and roll flute stress concentration point tooth root place, does not thus have a high reliability; (2) three planet wheels, overload capacity is not high; (3) axial dimension length, complex structure, price are high;

(4) need distribution magnetic brake, braking reliability is an extremely important index of variable propeller gearbox, and electromagnetic type braking reliability is poor, and particularly braking moment can not increase automatically with the increase of resisting moment;

In addition also have " three-disk cycloid single pitch-controlled speed reducer of wind turbine " (201010174471.6), its major defect is:

(1) three cycloid wheel phase difference 120 ° cannot realize dynamic balancing and can not be used for input speed higher than 1700rpm variable paddle speed reducer;

(2) cylindrical roller capacity eccentric bearing radial clearance is large, produces click, click microvibration during cycloid wheel translation, is not thus suitable for input and is not suitable for variable paddle speed reducer higher than 1700rpm occasion;

(3) pinhole grinder static balancing adjustment is pretty troublesome, pin-and-hole grinding accuracy relation stable drive, noise and working life;

(4) need distribution magnetic brake, braking reliability is an extremely important index of variable propeller gearbox, and electromagnetic type braking reliability is poor, and particularly braking moment can not increase automatically with the increase of resisting moment;

[summary of the invention] the present invention is that " three-disk cycloid single pitch-controlled speed reducer of wind turbine " improves, convert wherein to be with and all carried ring W output mechanism and partly bury toothing, have employed two group steel ball V-type slot device, object provides the wind-powered electricity generation that a kind of high reliability, overload power are large, braking moment increases with resisting moment and automatically increases permanent baking cycloid variable propeller gearbox.Technical solution of the present invention is as follows:

(A), in three pieced cycloidal gear, breast wheel thickness is both sides uniform thickness wheel twices, and the two phase shifting 180 °, can realize dynamic balancing;

(B) adopt back-to-back tapered roller capacity eccentric bearing, radial clearance is transferred to and is bordering on zero, produces vibration when eliminating cycloid wheel translation;

Prototyping testing confirms, after have employed technological scheme (A) and (B), and normal operation during input 3000rpm.

(C) adopt after cycloid wheel rim roll flute with cast iron spoke workpiece package assembly, wherein the uniform pin-and-hole of cast iron spoke can adopt right boring in vertical machining centre and obtain enough highi degree of accuracy, and work efficiency is high.In pin-and-hole, sliding wear-resisting ring of joining improves working life.Tradition cycloid wheel uniform pin-and-hole must grinding on pin-and-hole special purpose grinder, because now cycloid wheel is in large eccentricity position, and pin-and-hole is little must adjust to very high static balancing and could obtain designing requirement, work efficiency is extremely low, and need configure the pin-and-hole special purpose grinder of all size;

(D) present invention employs the structure innovation of two group steel ball V-type slot device, friction pair and spring assembly, wherein: two groups of steel ball V-type slot devices improve (seeing Ruan Zhongtang " mechanical stepless transmission " 90 pages) according to steel ball V-type groove automatic pressurizing device in mechanical stepless transmission: first group is made up of active V-type slotted disk, the driven V-type slotted disk in telophragma side and the steel ball occupy in the middle of two dish V-type groove faces, and wherein telophragma connects with cone dish; Second group is made up of telophragma opposite side active V-type slotted disk, the second driven V-type slotted disk and the steel ball occupy in the middle of two dish V-type groove faces, and steel ball is distributed on retainer.Working principle: during energising, first group of active V-type groove face produces positive pressure to steel ball, and its axial thrust load promotes the driven V-type slotted disk of telophragma makes friction pair be separated, and braking moment disappears, and its circumferential component drives the output shaft work done connected with second group of driven V-type slotted disk; During power-off, input shaft stop, resisting moment makes the second driven V-type groove face produce positive pressure to steel ball, and its axial thrust load makes friction pair compress, and braking moment will muchly have much.

[beneficial effect] is embodied according to patent of invention " variable propeller gearbox of wind power generator " (ZL200410064931.4) its creativeness:

(1) braking is reliable: braking moment increases with resisting moment and automatically increases;

(2) cycloidal gear teeth and half imbedding needle pin can not break, thus large than only there being three planet wheel NGW Transmission bearing;

(3) inertial force that during running, three are taken turns and moment of inertia complete equilibrium in theory;

(4) single-stage speed reducing is than up to 143, lightweight, axial dimension is short and low cost of manufacture 45-55%.

Each wind field variable propeller gearbox is worth (99 × 40,000/platform) 3,960,000 yuan, thus can save 2,000,000 yuan, is enough to pay wind field 4-5 name employee compensation by this interest of 2,000,000.Announce according to Wind Energy In China association, within 2010, newly-increased installed capacity of wind-driven power is 189GW, and be equivalent to 380 (33 × 1.5MW) wind fields, variable propeller gearbox is worth 15 hundred million, thus can save 7.5 hundred million, be equivalent to China's three large wind power gear corporate profit summations.

[accompanying drawing explanation] Fig. 1. embodiment of the present invention structural representation

Fig. 2. be respectively steel ball and V-type groove face at power-off (braking) and Force principle figure during energising (work done) with 3.

[embodiment] encyclopaedizes the present invention below in conjunction with accompanying drawing:

With reference to Fig. 1. the permanent baking cycloid variable propeller gearbox of a kind of wind-powered electricity generation, comprise cyclo drive part and brake component, described cyclo drive part comprises support 1, second input shaft 4, cycloid wheel assembly, capacity eccentric bearing, pin wheel housing 22, needle pin 27, middle support 19 and pin axle type output mechanism, described pin axle type output mechanism comprises output shaft 3, pin 16, column sleeve 8, 13 and first, two all carry ring 11, 17, described output shaft 3 the 4th bearing 2 is bearing in support 1 endoporus, described support 1, pin wheel housing 22 and middle support 19 are integrally togather in turn, described second input shaft 4 both sides are with first, two bearings 23, 24 are bearing in output shaft 3 and middle support 19 endoporus respectively, described first all carries ring 11 is placed between cycloid wheel, second all carries ring 17 is contained in pin 16 end and is bearing on middle support 19 medial flange cylindrical with the 3rd bearing 18, pin is freely supported structure, improve the crooking ability of pin, it is characterized in that:

(I) described cycloid wheel assembly is first, two cycloid wheel rims 10, 21 connect first respectively with junction of the edges of two sheets of paper pin, two cast iron spokes 7, the builtup member of 20, the uniform pin-and-hole of cast iron spoke can adopt right boring in vertical machining centre, precision is high, described second cycloid wheel rim 21 thickness is the first cycloid wheel rim 10 twice of both sides uniform thickness, first cycloid wheel rim 10 phase difference 180 ° of the second cycloid wheel rim 21 and both sides, can dynamic balancing be realized and input speed can be improved, described first, two cast iron spokes 7, in pin-and-hole uniform on 20, cunning joins first respectively, two wear-resisting rings 9, 14, theory calculate shows, because the equivalent radius of wear-resisting ring and pin-and-hole is very little, and make contact stress between wear-resisting ring and pin-and-hole be only 1/20th of allowable value, so low hardness pin-and-hole can not premature abrasion, described cast iron spoke material is spheroidal graphite cast iron or high-strength gray cast iron, this is because spheroidal graphite cast iron or grey cast iron have good process for machining performance, absorbing, low noise and good casting property,

(II) described capacity eccentric bearing is contained on the second input shaft 4, described capacity eccentric bearing be by first and second tapered roller bearing 6,15 endoporus respectively first and second eccentric bushing 5,12 of close-fitting form, described tapered roller bearing is two back-to-back bearing pack, radial clearance is controlled to and be bordering on zero during assembling;

(III) described needle pin 27 half is embedded in pin wheel housing 22, is called and partly buries toothing (seeing Zhu Xiaolu " Gear Transmission Design handbook " 828 pages), make needle pin can bear very high bending force;

(IV), in described brake component, the first input shaft 29 bearing is bearing in front support 28 endoporus, and front support 28 connects with middle support 19, its endoluminal means Shuan ZuVXing slotted disk mechanism, friction pair and Returnning spring 26, wherein:

(IV-1) described friction pair comprises internal cones 32 and cone dish 31, and wherein internal cones 32 is connected in front support 28 endoporus, and cone dish 31 connects with the telophragma 33 of Shuan ZuVXing slotted disk mechanism;

(IV-2) in described Shuan ZuVXing slotted disk mechanism, first group of active V-type slotted disk 30 is connected on the first input shaft 29, telophragma 33 side is the first driven V-type slotted disk, be placed between two V-type grooves and have steel ball 34, the driven V-type slotted disk 35 of second group and the external splines axle stretch end 4-1 of the second input shaft 4 are slidably connected, telophragma 33 opposite side be second group initiatively V-type slotted disk, be placed between two V-type grooves and have steel ball 34, the steel ball quantity be distributed on retainer is equal with V-type groove number;

(IV-3) described Returnning spring 26 one end is close to the end in cup type spring seat 25, the other end is close to second group of driven V-type slotted disk 35 end face, Returnning spring 26 makes cone dish 31 and internal cones 32 friction pair compress, and described cup type spring seat 25 exterior edge face is close on second input shaft 4 shaft shoulder.

Working principle: during energising, first group of active V-type groove face produces positive pressure to steel ball, and its axial thrust load promotes the driven V-type slotted disk of telophragma makes friction pair be separated, and braking moment disappears, and its circumferential component drives the output shaft work done connected with second group of driven V-type slotted disk; During power-off, input shaft stop, resisting moment makes the second driven V-type groove face produce positive pressure to steel ball, and its axial thrust load makes friction pair compress, and braking moment will muchly have much, large to friction pair conquassation, ensures to be in highly reliable braking state always.

Claims (1)

1. the permanent baking cycloid variable propeller gearbox of wind-powered electricity generation, comprise cyclo drive part and brake component, described cyclo drive part comprises support (1), second input shaft (4), cycloid wheel assembly, capacity eccentric bearing, pin wheel housing (22), needle pin (27), middle support (19) and pin axle type output mechanism, described pin axle type output mechanism comprises output shaft (3), pin (16), column sleeve (8, 13) and first, two all carry ring (11, 17), described output shaft (3) the 4th bearing (2) is bearing in support (1) endoporus, described support (1), pin wheel housing (22) and middle support (19) are integrally togather in turn, and described second input shaft (4) both sides are with first, two bearings (23, 24) output shaft (3) and middle support (19) endoporus is bearing in respectively, described first all carries ring (11) is placed between cycloid wheel, second all carries ring (17) is contained in pin (16) end and is bearing on middle support (19) medial flange cylindrical with the 3rd bearing (18), pin is freely supported structure, it is characterized in that:

(I) described cycloid wheel assembly is first and second cycloid wheel rim (10,21) connects first and second cast iron spoke (7,20) respectively builtup member with junction of the edges of two sheets of paper pin, described second cycloid wheel rim (21) thickness is the first cycloid wheel rim (10) twice of both sides uniform thickness, first cycloid wheel rim (10) phase difference 180 ° of the second cycloid wheel rim (21) and both sides, in the upper uniform pin-and-hole of described first and second cast iron spoke (7,20), cunning joins first and second wear-resisting ring (9,14) respectively;

(II) described capacity eccentric bearing is contained on the second input shaft (4), described capacity eccentric bearing is formed by first and second tapered roller bearing (6,15) endoporus difference first and second eccentric bushing of close-fitting (5,12), and described tapered roller bearing is two back-to-back bearing pack;

(III) described needle pin (27) is partly embedded in pin wheel housing (22);

(IV) in described brake component, first input shaft (29) bearing is bearing in front support (28) endoporus, front support (28) connects with middle support (19), its endoluminal means Shuan ZuVXing slotted disk mechanism, friction pair and Returnning spring (26), wherein:

(IV-1) described friction pair comprises internal cones (32) and cone dish (31), wherein internal cones (32) is connected in front support (28) endoporus, and cone dish (31) connects with the telophragma (33) of Shuan ZuVXing slotted disk mechanism;

(IV-2) in described Shuan ZuVXing slotted disk mechanism, first group of active V-type slotted disk (30) is connected on the first input shaft (29), telophragma (33) side is the first driven V-type slotted disk, be placed between two V-type grooves and have steel ball (34), the driven V-type slotted disk (35) of second group and the external splines axle stretch end (4-1) of the second input shaft (4) are slidably connected, telophragma (33) opposite side be second group initiatively V-type slotted disk, be placed between two V-type grooves and have steel ball (34), the steel ball quantity be distributed on retainer is equal with V-type groove number;

(IV-3) described Returnning spring (26) one end is close to cup type spring seat (25) the interior end, the other end is close to second group of driven V-type slotted disk (35) end face, Returnning spring (26) makes cone dish (31) and internal cones (32) friction pair compress, and described cup type spring seat (25) exterior edge face is close on the second input shaft (4) shaft shoulder.