CN103827484A - Step-up gear for wind-powered electricity generation - Google Patents

Abstract

In order to obtain a step-up gear for wind-powered electricity generation that is highly reliable and has a long service life while also being compact, lightweight, and low-cost, a step-up gear (50) for wind-powered electricity generation, which is equipped with a planetary gear mechanism (52), is further equipped with a planetary gear (68) that forms one element of the planetary gear mechanism (52), and a carrier (support member) (62) on which the planetary gear (68) is rotatably supported via a roller bearing (76). The construction is such that a space (S1) in which a lubricant can penetrate, and which enables at least two of the three elements, that is, the planetary gear (68), the roller bearing (76), and the carrier (support member) (62), to undergo a minute relative displacement in the radial direction, is formed at any region of the roller bearing (76) other than the region where relative rotation occurs.

Description

Speed increaser used for wind power generation

Technical field

The present invention relates to a kind of speed increaser used for wind power generation.

Background technique

For example in patent documentation 1, disclose speed increaser used for wind power generation as shown in Figure 6 to 8.

In Fig. 6 and Fig. 7, wind generating unit 1 has: pillar 2, is erected to be arranged on base station 6; Nacelle 3, is arranged at the upper end of pillar 2; And rotor head 4, be assembled into respect to this nacelle 3 and rotate freely.Multi-disc (in illustrated example being 3) air vane (awe) 5 is installed on rotor head 4.In the inside of nacelle 3, speed increaser 20 and generator 11 are connected in rotor head 4.

In the time that air vane 5 is arrived in wind, rotor head 4 rotates, and the rotation of this rotor head 4 is to utilize the state transfer of speed increaser 20 speedups to generator 11.Thus, although rotor head 4(can be had to torque) the speed of slow-paced rotation speedup to 100 times left and right, and can effectively obtain generating output from generator 11.In addition, the symbol 12 shown in Fig. 7 is transformer, and 13 is controller, and 14 is inverter, and 15 is inverter cooler, and 16 is lube oil cooler.

As shown in Figure 8, described speed increaser 20 possesses planetary gears 22 at leading portion, and in stage casing and back segment possess parallel-axes gears mechanism 24,26.The rotation of the main shaft (omitting diagram) of the rotor head 4 of inputting from input shaft 28 is added up to gear mechanism 22,24,26 speedups of 3 sections, and exports from output shaft 30.On output shaft 30, be linked with aforementioned generator 11.

Described planetary gears 22 mainly by with the integrated wheel carrier 32 of input shaft 28, be fixed on the planet pin 34 of this wheel carrier 32, form with the internal gear 38 and the sun gear 40 that rotate mode freely and be supported on the planetary pinion 36 of this planet pin 34, engaged by this planetary pinion 36 simultaneously.In this example, sun gear 40 is integrated with the output shaft 42 of planetary gears 22, and internal gear 38 is integrated with housing 44.

In addition, between described planet pin 34 and planetary pinion 36, be provided with roller bearing 46, can tackle from the large torque of air vane 5 side inputs.

Conventional art document

Patent documentation

Patent documentation 1: TOHKEMY 2009-144533 communique (Fig. 6～Fig. 8)

Summary of the invention

The technical task that invention will solve

The life expectancy of wind power plant was designed to about 20 years.Therefore, require speed increaser also substantially to guarantee the life-span about 20 years.

But, wind power plant may not one be arranged at the place that can guarantee all the time stable wind-force surely, especially in recent years, have to be arranged at the air-dry place of disturbing that is subject to turbulent flow of portion with a varied topography etc., or the example that is sometimes applied with the place of the huge wind load such as typhoon and hurricane also increases.Actual conditions are, be arranged in the wind power plant of such kind of area, (even in the situation that designing according to guilding principle) about the fault of speed increaser especially many.Once speed increaser breaks down, its loss is great, therefore guarantees that reliability is extremely important.

Conventionally, guarantee most importantly in the time of design, to increase in the effective countermeasure of reliability of speed increaser the Security (safety coefficient) of each important document.But, if increase the Security of each important document, naturally cause the maximization of speed increaser entirety and weight also to become greatly, produce the problem that causes manufacture cost, construction cost to increase.

The present invention proposes in order to address the above problem, and its basic assignment is to provide by overcoming newfound middle problem (aftermentioned) speed increaser used for wind power generation that a kind of volume is little, lightweight, cost is low and reliability is high, the life-span is long.

For the means of technical solution problem

The present invention solves above-mentioned basic assignment by being made as following structure, possesses the speed increaser used for wind power generation of planetary gears, and wherein, described speed increaser used for wind power generation possesses: gear, forms parts of described planetary gears; And support unit, support this gear via bearing in the mode that can rotate, the random position except counterrotating position in described bearing forms gap, this gap can make oiling agent enter, and can make at least 2 persons in described gear, bearing and support unit carry out micro-displacement along radial direction toward each other.

Due to of the present invention described in the middle of problem and to solve principle be not known content, therefore at this, this centre problem that the present invention is had in mind and solution principle thereof are elaborated.

On the air vane of wind power plant, moment applies " wind of wind speed and direction change " consumingly sometimes.For example, if strong strong wind puts on air vane, each parts moment of speed increaser is applied to strong accelerating torque.But the generator that is linked with High Rotation Speed due to the front end of speed increaser is as load, therefore, each parts of speed increaser cannot be followed this accelerating torque moment because of inertia and be increased speed.Its result, when the rising of accelerating torque is sharply time, causes this accelerating torque sharply rising (as on being applied to static each parts) moment to be all applied on each parts.

In addition, in the time being for example wind direction severse weather jumpy, sometimes due to " unexpected contrary wind " etc. and apply wind-force from the opposition side of air vane.Thus, can produce the phenomenon that rotating speed moment of this air vane declines to a great extent.Now, apply stronger deceleration torque from each parts of input shaft side direction speed increaser.But (different when applying accelerating torque), in the time applying stronger deceleration torque suddenly, even if the sense of rotation of air vane does not become opposite direction, also can produce the phenomenon of the formation direction reversion of the backlash forming between the flank of tooth of each gear so far.This is because input shaft becomes " state of giving braking force " from " giving the state of driving force ".Backlash when reversion, due to the flank of tooth direct collision each other of each gear, therefore can think the flank of tooth (the now face of opposition side when with common driving) is applied to strong impact.Under this state, while acceleration if this " unexpected contrary wind " stops, the backlash of the flank of tooth can reverse again again.Therefore, if final bad weather and blowing, this situation of every generation, flank of tooth conflict each other all can be carried out repeatedly, causes continually each flank of tooth being applied to impact from both sides.

The present invention invents with following thinking, infer the fault for speed increaser used for wind power generation, the larger torque applying continuously while being not only high wind, more because larger load or the impact of this " the sharply variation of wind speed and direction " moment (peak value) generation on each parts of speed increaser also can produce larger impact, and using relaxing this strong momentary load or impacting this point and grasp as " middle problem ", solve above-mentioned basic assignment by overcoming this centre problem.

In the present invention, form via the random position beyond the counterrotating position of bearing " gap " that oiling agent can enter at gear and support unit.This gap can allow that at least 2 persons in gear, bearing and support unit carry out micro-displacement along radial direction toward each other.

At present, if the rotating speed of input shaft because " the sharply variation of wind speed and direction " etc. is former thereby sharply change, speed increaser wants moment automatically to form the most stable engagement in this moment originally.Now, according to the present invention, due to the existence in above-mentioned gap, as a result of, at least 2 persons in gear, bearing and support unit can carry out micro-displacement along radial direction each other relatively.Its result, produces the movement (turnover) of the oiling agent in gap because the formation form in above-mentioned gap changes, and therefore can produce the resistance of the movement (especially wanting the movement out from gap) of wanting to hinder this oiling agent simultaneously.By this resistance, (if not having resistance will cause directly sharply rising) can make load or damp impacts.

Speed increaser used for wind power generation involved in the present invention is assembled in and is arranged on that easily to blow the area of high wind or the unsettled area of wind direction be in the regional wind power plant that the turbulent flow of wind is larger time, especially effectively plays a role.

Invention effect

According to the present invention, can obtain the speed increaser used for wind power generation that a kind of volume is little, lightweight, cost is low and reliability is high, the life-span is long.

Accompanying drawing explanation

Fig. 1 is the sectional view that represents the major component of the speed increaser used for wind power generation of an example of embodiments of the present invention.

Fig. 2 is the integrally-built sectional view of the speed increaser of presentation graphs 1.

Fig. 3 is the sectional view that represents the major component of the related speed increaser used for wind power generation of another embodiment of the present invention.

Fig. 4 is the sectional view that represents the major component of the related speed increaser used for wind power generation of another embodiment of the invention.

Fig. 5 is the framework map that represents the basic structure of the planetary gears of the related speed increaser used for wind power generation of another embodiment of the invention.

Fig. 6 is the plan view that represented in the past an integrally-built example of the wind power plant of (and the present invention).

Fig. 7 is the stereogram of the internal structure of the nacelle of the wind power plant of presentation graphs 6.

Fig. 8 is the sectional view that represents an example of the speed increaser used for wind power generation in the past in the nacelle of the wind power plant that is arranged at Fig. 6.

Embodiment

Below, with reference to the accompanying drawings an example of embodiments of the present invention is elaborated.

For the basic structure of wind power plant that is assembled with speed increaser involved in the present invention, identical with the explanation that utilizes Fig. 6, Fig. 7 to carry out, therefore omit repeat specification, below, the structure of speed increaser itself is elaborated.

Fig. 1 is the sectional view that represents the major component of the speed increaser used for wind power generation 50 of an example of embodiments of the present invention, and Fig. 2 is its overall sectional view.

First, with reference to figure 2, this speed increaser 50 used for wind power generation possesses planetary gears 52 at leading portion, and in stage casing and back segment possess the 1st parallel-axes gears mechanism 54 and the 2nd parallel-axes gears mechanism 56.The rotation of the main shaft (omitting diagram) of inputting from input shaft 58 is added up to gear mechanism 52,54,56 speedups of 3 sections, and exports from output shaft 60.On output shaft 60, be linked with generator (identical with generator 11 in the past: with reference to figure 7), the generating that the professional etiquette of going forward side by side is fixed.

Described planetary gears 52 is mainly by forming as follows: wheel carrier 62, and integrated with input shaft 58; Planet pin 64, dual-supporting is in this wheel carrier 62; 3 (only illustrating 1 in Fig. 2) planetary pinions 68, are supported on this planet pin 64 in the mode of rotating freely; Internal gear 70, engages simultaneously with this planetary pinion 68; And sun gear 72, with planetary pinion 68 outer gearings simultaneously.In this mode of execution, sun gear 72 is directly formed at the output shaft 80 of planetary gears 52, and internal gear 70 is integrated (fixing) with housing 74.

In described wheel carrier 62, discoid a pair of wheel carrier flange 62A, 62B via linking department 62C link/opposed, and between this pair of wheel carrier flange 62A, 62B, be assembled with described planetary pinion 68, internal gear 70 and sun gear 72. Wheel carrier flange 62A, 62B are supported on the housing 74 of speed increaser 50 in rotation mode (together with input shaft 58) freely by bearing 75,78.

Described planet pin 64 is pressed into this pair of wheel carrier flange 62A, 62B and by dual-supporting.Described planetary pinion 68 is supported by this planet pin 64 in the mode that can rotate via roller bearing 76.That is, in this mode of execution, planetary pinion 68 is equivalent to " gear " of claim 1, and roller bearing 76 is equivalent to " bearing ", and planet pin 64 is equivalent to " support unit ".

At this, in the lump with reference to figure 1, near the structure planetary pinion of the speed increaser to present embodiment is described in more detail.

As previously mentioned, planetary pinion 68 is supported on (support unit) planet pin 64 via roller bearing 76 in the mode that can rotate.In this mode of execution, 2 roller bearing 76 configurations side by side vertically.Each roller bearing 76 possesses inner ring 76A, outer ring 76B, roller (rolling element) 76C and retainer 76D.The inner ring 76A of roller bearing 76 is via spacer element 82(82A～82C) between wheel carrier flange 62A, 62B, be positioned vertically.And the outer ring 76B of roller bearing 76 is positioned with respect to inner ring 76A vertically via roller 76C, middle spacer element 82B and retainer 76D.

Planetary pinion 68 possesses center hole 68A.In center hole 68A, be formed with groove 68B, the upper engaging of this groove 68B has back-up ring 69.Thus, planetary pinion 68 is positioned vertically with respect to end 76A1, the 76B1 of the outer ring 76B of 2 roller bearings 76, and limits moving axially of this planetary pinion 68.

But the minute movement of the radial direction of planetary pinion 68 is not limited especially.For the movement of circumferencial direction, at least outer ring 76B to roller bearing 76() do not limit completely.,, in this mode of execution, between outer ring 76B and the center hole 68A of planetary pinion 68, form gap S1.Particularly, in this mode of execution, gap S1 is set as the 0.3%(3/1000 of the outside diameter d 1 of roller bearing 76) left and right size.This gap S1 can make that the outer ring 76B of planetary pinion 68 and roller bearing 76 is relative carries out micro-displacement along radial direction.In this mode of execution, roller bearing 76 with support unit be that the integrated state of planet pin 64 is assembled, therefore, planetary pinion 68 carries out micro-displacement with respect to roller bearing 76.

Planetary pinion 68 can carry out micro-displacement with respect to roller bearing 76 and refer to, as a result of, planetary pinion 68 except the micro-displacement of the circumferencial direction causing because of common backlash, can also carry out along radial direction the micro-displacement of the amount of this gap S1 with respect to internal gear 70 and sun gear 72.

Oiling agent (lubricant oil) in speed increaser 50 can enter in the S1 of this gap.For the function of the oiling agent in the S1 of gap, be elaborated afterwards.

Then, the effect of the related speed increaser used for wind power generation 50 of this mode of execution is described.

The rotation of air vane 5 is passed to the input shaft 58 of speed increaser 50 via the main shaft of rotor head 4.The rotation of input shaft 58 is via wheel carrier 62( wheel carrier flange 62A, 62B) as the revolution of planetary pinion 68 and be input in planetary gears 52, by this relative rotation of planetary pinion 68, internal gear 70 and sun gear 72, exported to the output shaft 80 of planetary gears 52 from sun gear 72 by the rotation of speedup.

The rotation of the output shaft 80 of planetary gears 52 is amplified by the 1st parallel-axes gears mechanism 54 via coupling 79, and after further being amplified by the 2nd parallel-axes gears mechanism 56, finally exports from the output shaft 60 of this speed increaser 50.The output shaft 60 of speed increaser 50 is linked to generator 11, therefore, finally can on the basis of rotation speedup that makes air vane 5, generator 11 be rotated, and can effectively carry out wind-power electricity generation.

Below, be conceived to the function of gap S1, the effect of planetary gears 52 is described in more detail.

If with the integrated wheel carrier 62(of input shaft 58 wheel carrier flange 62A, 62B) rotation, along with the rotation of this wheel carrier flange 62A, 62B, planet pin 64 is around the axle center revolution of planetary gears 52, therefore, planetary pinion 68 with external with sun gear 72 and with internal gear 70 in the state rotation that connects.

The relative rotation of planet pin 64 and the circumferencial direction of planetary pinion 68, mainly realizes via the relative rotation of roller 76C of this roller bearing 76 with outer ring 76B by the inner ring 76A of roller bearing 76.This is because because the interval of gap S1 is extremely narrow, if will produce the relative rotation of circumferencial direction between the outer ring of roller bearing 76 76B and planetary pinion 68, the oiling agent being present in the S1 of this gap produces shearing stress.; follow the generation of this shearing stress; counterrotating resistance with respect to planet pin 64 with the circumferencial direction of planetary pinion 68; be far longer than roller bearing 76 places at S1 place, gap; therefore as a result of; (irrelevant with the existence of gap S1), the outer ring 76B of roller bearing 76 with planetary pinion 68(at least in the time conventionally turning round) carry out hardly relative rotation.

On the other hand, when bad weather, especially in the time that the high wind changing as wind direction is frequent sweeps etc. in situation, the rotating torques variation (or sharply changing) of air vane 5, the revolution Driving force from wheel carrier 62 that therefore puts on planetary pinion 68 changes too.Thus, the engagement reaction force of accepting from internal gear 70 and sun gear 72 also changes, and therefore, puts on the radial load change of gap S1 part.Its result, repeats planetary pinion 68 and is specially the outer ring 76B of roller bearing 76 integrated with it with respect to planet pin 64() carry out the state of micro-displacement along radial direction.

By this micro-displacement, if narrow at the interval of certain a part of gap S1 of circumferencial direction, the oiling agent that is present in this part is extruded and is extruded into outside the S1 of gap.On the contrary, at diametric opposition side, the interval of gap S1 expands, and oiling agent enters in the S1 of gap.Now, especially become oiling agent narrower and in the S1 of gap at the interval of gap S1 when being extruded and extruding, in oiling agent, produce compared with strong compressive stress and because being forced the mobile shearing stress producing at narrow space.

By producing this compressive stress and shearing stress, can prevent between 2 parts across this gap S1, peak value load is delivered to opposite side from a side direct (keeping intact).That is, planetary pinion 68 and and support unit be between the outer ring 76B of the integrated roller bearing 76 of planet pin 64, if there is not gap S1, the transmission of the impact torque of directly sharply significantly rising and sharply declining is suppressed.

And, suppose, if apply the load of the circumferencial direction that exceedes this shearing stress in the scope of the shearing stress of the circumferencial direction of the oiling agent in the S1 of gap between the planetary pinion 68 of one rotation and the outer ring 76B of roller bearing 76 always, between this planetary pinion 68 and the outer ring 76B of roller bearing 76, produce " slip ", therefore think by the slip of this new generation, also can bring into play the assimilation effect of impact.

In addition, by suppressing the transmission of cogging sharply, can reduce the frequency of backlash reversion, even if suppose to reverse, the impact of the flank of tooth also can further reduce reversion time.Think that in fact this effect not little in the case of being arranged at the wind power plant in the unsettled area of wind direction.

In addition, in the case of the related speed increaser used for wind power generation 50 of this mode of execution, planetary pinion 68 is 3, the contact points of carrying out transmission of power adds up to and has 6 places, and the pitch circle of each planetary pinion 68 and revolution orbit (with respect to the position of the planet pin 64 of a wheel carrier 62) determining cause foozle and deviation to some extent.In addition, the alignment of internal gear 70 and sun gear 72 also may not necessarily be guaranteed exactly.

Therefore,, in the case of (possessing planetary gears) speed increaser used for wind power generation in the past, there is the trend that only easily applies the load of larger transmitting torque in a certain " specific contact points ".Certainly, if be only subject to the load of larger transmitting torque in specific contact points, cause the damage of this specific contact points further to strengthen, and this impact become more obvious in the case of being applied with the impact torque of sharply rising and sharply decline.

The speed increaser 50 related according to this mode of execution, due to the existence of gap S1,3 planetary pinions 68 can carry out micro-displacement with respect to internal gear 70 and sun gear 72 along radial direction respectively, therefore also obtain (moment) immediately this moment automatically and form more like a cork the effect of the most stable engagement.The function that can automatically form this stable engagement not only in the situation that being applied with impact torque, and is also maintained all the time in wind direction situation so not jumpy, therefore thinks and also contributes to the more absorption of the variance components of low-frequency region.

Its result, due to the existence of the oiling agent in the S1 of S1Ji Gai gap, gap, the total amount of the energy from air vane 5 to generator 11 is roughly the same, and especially can reduce the peak value of the load that puts on each parts, and reduces moment and produce excessive load and impact.Its result, can more stably transmit the torque of inputting from air vane 5, can greatly extend the life-span of speed increaser.

In addition, in above-mentioned mode of execution at the outer ring of roller bearing 76(76B) and planetary pinion 68 between form gap S1, and the formation position in gap involved in the present invention has more than and is defined in this position.For example, substitute the formation of above-mentioned gap S1, or except forming above-mentioned gap S1, illustrate with dotted line form gap S2(Fig. 1 between the inner ring 76A of roller bearing 76 and planet pin (support unit) 64 in), also can obtain identical action effect.

The size in gap be also not limited to gap internal diameter (in above-mentioned mode of execution for the outer ring 76B of roller bearing 76 external diameter) 3/1000.If the formation position to gap, formation number or size (interval) change, the inertial mass of parts and the form of displacement that can carry out micro-displacement can dissimilate, and therefore can adjust the frequency content in the region that can absorb well variation (load change).Therefore, can consider to arrange the character of the actual wind of blowing in the area of wind power plant and suitably set.

Fig. 3 represents an example of another embodiment of the present invention.

In this mode of execution, planetary pinion 83 is made up of the 83A of planetary pinion portion and the planet pin 83C of portion that supports the 83A of this planetary pinion portion.From this structure example, " gear " of the present invention may be defined as the parts or the parts group that are supported on parts or the parts group of support unit via bearing in the mode that can rotate and have tooth portion.And being somebody's turn to do (comprising the planet pin 83C's of portion) planetary pinion 83 is a pair of wheel carrier flange 84A of wheel carrier 84(, 84B by being disposed at the support unit of both sides) be can rotate with respect to this wheel carrier 84 via roller bearing 86 by dual-supporting.Planetary pinion 83 can rotate relatively with wheel carrier flange 84A, 84B via roller bearing 86.Roller bearing 86 possesses inner ring 86A, outer ring 86B and roller 86C.

Gap S3 involved in the present invention is formed at a pair of wheel carrier flange 84A of wheel carrier 84(, 84B) and the outer ring 86B of roller bearing 86() between.; in this mode of execution; (comprising the planet pin 83C's of portion), planetary pinion 83 was equivalent to " gear " of the present invention, a pair of wheel carrier flange 84A of wheel carrier 84(, 84B) be equivalent to support in the mode that can rotate via roller bearing 86 " support unit " of this " gear ".

The structure related by this mode of execution also can be identical with aforementioned embodiments, and planetary pinion 83 can be that wheel carrier 84 carries out micro-displacement along radial direction with respect to support unit.But related planetary pinion 83 one of this mode of execution comprise the planet pin 83C of portion, the inertial mass of therefore carrying out the parts of micro-displacement is greater than above-mentioned mode of execution.Therefore the variation that, likely can carry out well in low-frequency region more according to design absorbs.

Also can substitute gap S3 or except the S3 of gap to this mode of execution, between the inner ring 86A of roller bearing 86 and planetary pinion 83, form gap S4(Fig. 3 in dotted line diagram).In addition, substitute on above-mentioned wheel carrier 84 and form gap S3(or S4), or in addition, also in can gap S7(Fig. 3 being set between the 83A of planetary pinion portion of planetary pinion 83 and the planet pin 83C of portion, illustrate with dotted line), or between planet gear part 83A and the planet pin 83C of portion, configure ring-shaped member (omitting diagram) as described later.Thus, except gap S3(or S4 because of on wheel carrier 84) the variation assimilation effect that produces, between planet gear part 83A and the planet pin 83C of portion, (according to the frequency content of wanting absorption) also can obtain effectively changing assimilation effect.In addition, the 83A of planetary pinion portion and planet pin 83C can be integrally formed but not split formation.

Other structure is identical with above-mentioned mode of execution, therefore in Fig. 3, only identical with above-mentioned mode of execution or functionally similar part is marked to same-sign, and omits repeat specification.

Fig. 4 represents an example of another embodiment of the invention.

In the related speed increaser used for wind power generation 91 of this mode of execution, take the structure of the mode of execution of Fig. 1, Fig. 2 as basis, and at the outer ring 76B of planetary pinion 68 and roller bearing 76() between ring-shaped member 88 is set.Be formed with closely-spaced gap S5 in the inner circumferential side of this ring-shaped member 88, be formed with larger gap S6 at outer circumferential side.Therefore,, due to the existence of these 2 gap S5 and S6, planetary pinion 68 can be that planet pin 64 carries out micro-displacement along radial direction with respect to support unit.In addition, one of them in above-mentioned gap S5, S6 do not exist and also can.

In this mode of execution, ring-shaped member 88 itself can be with respect to the outer ring 76B of planet pin 64(and roller bearing integrated with it 76) carry out micro-displacement along radial direction, and, planetary pinion 68 can carry out micro-displacement along radial direction with respect to this ring-shaped member 88, therefore, can further expand the frequency field that can absorb well variance components.

And, in this embodiment, following situation is also effectively, according to the frequency field of wanting to absorb variation, be the inner ring 76A of planet pin 64 and roller bearing 76(at support unit) between, be identically formed in the S2(Fig. 4 of gap with dotted line diagram with the mode of execution of Fig. 1, Fig. 2).

In addition, substitute between planetary pinion 68 and the outer ring 76B of roller bearing 76, or between planetary pinion 68 and the outer ring 76B of roller bearing 76, also above-mentioned ring-shaped member 88 can be disposed between the inner ring 76A and planet pin 64 of roller bearing 76.

Other structures are identical with the mode of execution of Fig. 1, Fig. 2, therefore in Fig. 4 only to identical with the mode of execution of Fig. 1, Fig. 2 or similar part mark same-sign, and omit repeat specification.

In addition, the configuration of above-mentioned ring-shaped member also goes in the mode of execution shown in above-mentioned Fig. 3.Set up ring-shaped member in the mode of execution shown in Fig. 3 time, this ring-shaped member can be disposed between a pair of wheel carrier flange 84A, 84B and the outer ring 86B of roller bearing 86 or planetary pinion 83 that the planet pin 83C of portion is integrated on this planet pin 83C of portion and the inner ring 86A of roller bearing 86 between any one or the two.

Most importantly, in the present invention, configurable any one between gear and bearing, between bearing and support unit of ring-shaped member, and, can arbitrary disposition is multiple also can only configure 1, in addition, can also not be configured.Configuration is when ring-shaped member, and gap can only be arranged at the outer circumferential side of this ring-shaped member, also can only be arranged at inner circumferential side, can also be arranged at outer circumferential side and inner circumferential side these two.

As mentioned above, in the present invention, specifically in which position with which kind of size form and be not particularly limited about gap.Key is as a result of, can form as follows, i.e. (with having or not ring-shaped member independently) random position except counterrotating position in bearing, can make oiling agent enter, and can make at least 2 persons in gear, bearing and support unit carry out micro-displacement along radial direction toward each other.From this viewpoint, can not there is ring-shaped member, also can configure in addition multiple.

If it is different with size or phase place to form the position in gap, the frequency field that can absorb variation also can dissimilate, and therefore, the regional character of wind power plant is set and can be carried out more effective variation absorption by consideration.

In addition, in the above-described embodiment, adopted the planetary gears of simple planetary structure as planetary gears, but planetary gears in the present invention is not limited to the planetary gears of simple planetary structure.For example, in TOHKEMY 2003-278849, disclose the planetary gears as shown in the framework map of Fig. 5.

This planetary gears 93 does not have sun gear, and have 2 with the 94A of planetary pinion portion, the 94B of the integrated identical number of teeth of the planet pin 94C of portion, and possess from each planetary pinion 94A of portion, 94B engagement and there are 2 internal gear 95A, 95B of the different numbers of teeth.When being applicable in speed increaser used for wind power generation (omission overview diagram), this planetary gears 93 uses with following form, internal gear 95A in 2 kinds of internal gear 95A, 95B and input shaft 92 link, if wheel carrier 97(needs, can be made as a pair of across planetary pinion 94) link with output shaft 96.

Although some complexity of the structure of this planetary gears 93, having advantages of can be correspondingly with various form Design speed increaser.Therefore,, as the speed increaser used for wind power generation larger to the restriction that space is set, mainly aspect size and dimension, can effectively utilize.

For example, this planetary gears 93 as aforementionedly do not have a sun gear, is therefore easy to form larger hollow portion (omitting diagram) at central part.Therefore,, need to arrange some control apparatus or sensor, pipe arrangement etc. in (or inner side) around input shaft 92 time, can effectively utilize this hollow portion.In addition, this planetary gears 93 can design the speedup of approximately 5 times to 30 times like a cork, therefore, if needed, can, in 1 section of parallel-axes gears mechanism (omitting diagram) that completes back segment, now, can reduce weight and axial dimension.

In the case of the speed increaser used for wind power generation of planetary gears 93 with said structure, particularly becoming following structure, is wheel carrier 97 by not shown bearing dual-supporting in the support unit that is present in its both sides by 2 94A of planetary pinion portion, 94B and integrated " planetary pinion 94 " forming of the planet pin 94C of portion.Therefore, can be by being suitable for the present invention with the structure of the structure similar shown in Fig. 3.

In addition, in this planetary gears 93, an internal gear 95A in 2 internal gear 95A, 95B is supported on housing 99 via bearing 98 in rotation mode freely, therefore according to design, can form gap involved in the present invention between this at this internal gear 95A, bearing 98 and the housing 99 that supports this internal gear 95A.

In other words, " gear " involved in the present invention is not limited to planetary pinion, according to the structure of planetary gears, also can be applicable to internal gear or sun gear.

As mentioned above, there are various structures about planetary gears is known, no matter adopt the planetary gears of any structure, as long as the random position except counterrotating parts in bearing forms following gap, can make oiling agent enter, and can make at least 2 persons in gear, bearing and the support unit of respective specific carry out micro-displacement along radial direction toward each other, just belong to category of the present invention, and can correspondingly obtain action effect of the present invention.Just preferably be suitable for the present invention at the supporting portion of " planetary pinion " of " simple planetary mechanism ".This be because, because it is simple in structure and cheap, and planetary pinion has revolution composition and rotation composition and is rotated with the state that is clamped in internal gear and sun gear, thus the effect highly significant that therefore this planetary pinion can carry out along radial direction micro-displacement generation because of the existence in gap.In addition, planetary number of gears is 3 in the above-described embodiment, but can be 2, can also be more than 4, to be not particularly limited.

And, in the above-described embodiment, all adopted roller bearing as bearing, but in the present invention, the kind of bearing is not limited to roller bearing.According to the structure of generate output or planetary gears, for example, can also adopt ball bearing and sliding bearing.And, in the above-described embodiment, bearing all have inner ring and outer ring these two, but in the present invention, do not form clearance side can be for omitting the bearing of inner ring or outer ring.Even in the case of adopting the bearing of arbitrary structures, except (between gear and the support unit) of the script as bearing carries out counterrotating position, all there is gap involved in the present invention.For example, adopt in the situation of sliding bearing as bearing, relative rotation when common running between gear and support unit is undertaken by the part of this sliding bearing all the time.Therefore, in this sliding bearing except counterrotating position, gap individualism involved in the present invention.In other words,, although inevitably there is gap on " the counterrotating position in bearing ", in this bearing, the gap at counterrotating position is not contained in gap of the present invention.With regard to " gap at counterrotating position in bearing ", be for example while thering is the bearing of Internal and external cycle, it is the gap between inner ring-rolling element-outer ring, if while not there is not one of them in Internal and external cycle, it is the gap between the parts of rolling surface of certain one-rolling element-formation rolling element of Internal and external cycle.

Utilizability in industry

The present invention can be used in the speed increaser of wind power plant.

The explanation of symbol:

1-wind power plant, 3-nacelle, 4-rotor head, 5-air vane, 11-generator, 50-speed increaser, 52-planetary gears, 58-input shaft, 60-output shaft, 62-wheel carrier, 64-planet pin, 68-planetary pinion, 70-internal gear, 72-sun gear, 74-housing, 76-roller bearing, 88-ring-shaped member, S1～S7-gap.

Claims (9)

1. a speed increaser used for wind power generation, it possesses planetary gears, and this speed increaser used for wind power generation is characterised in that to possess:

Gear, forms parts of described planetary gears; And

Support unit, supports this gear via bearing in the mode that can rotate,

The random position except counterrotating position in described bearing forms gap, and this gap can make oiling agent enter, and can make at least 2 persons in described gear, bearing and support unit carry out micro-displacement along radial direction toward each other.

2. speed increaser used for wind power generation according to claim 1, is characterized in that,

Described gear is the planetary pinion of described planetary gears,

This planetary pinion supports as can rotate with respect to this planet pin by the planet pin as described support unit, and

Described bearing possesses outer ring,

Described gap is formed between described gear and the outer ring of this bearing.

3. speed increaser used for wind power generation according to claim 1 and 2, is characterized in that,

Described gear is the planetary pinion of described planetary gears,

This planetary pinion supports as can rotate with respect to this planet pin by the planet pin as described support unit, and

Described bearing possesses inner ring,

Described gap is formed between described planet pin and the inner ring of this bearing.

4. speed increaser used for wind power generation according to claim 1, is characterized in that,

Described gear is the planetary pinion of described planetary gears,

This planetary pinion together with the planet pin of this gear one rotation, support as can rotate with respect to this wheel carrier by the wheel carrier of the described planetary gears as described support unit, and

Described bearing possesses outer ring,

Described gap is formed between this wheel carrier and the outer ring of this bearing.

5. according to the speed increaser used for wind power generation described in claim 1 or 4, it is characterized in that,

Described gear is the planetary pinion of described planetary gears,

This planetary pinion together with the planet pin of this gear one rotation, support as can rotate with respect to this wheel carrier by the wheel carrier of the described planetary gears as described support unit, and

Described bearing possesses inner ring,

Described gap is formed between this wheel carrier and the inner ring of this bearing.

6. according to the speed increaser used for wind power generation described in any one in claim 1 to 5, it is characterized in that,

Described planetary gears is simple planetary mechanism.

7. according to the speed increaser used for wind power generation described in any one in claim 1 to 6, it is characterized in that,

Between described gear and bearing, be provided with ring-shaped member,

In the inner circumferential side of this ring-shaped member and outer circumferential side at least one of them is formed with described gap.

8. according to the speed increaser used for wind power generation described in any one in claim 1 to 7, it is characterized in that,

Between described bearing and described support unit, be provided with ring-shaped member,

In the inner circumferential side of this ring-shaped member and outer circumferential side at least one of them is formed with described gap.

9. according to the speed increaser used for wind power generation described in claim 7 or 8, it is characterized in that,

Described speed increaser used for wind power generation possesses multiple described ring-shaped members.

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