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Publication numberCN102305188 A
Publication typeApplication
Application numberCN 201110240631
Publication date4 Jan 2012
Filing date19 Aug 2011
Priority date19 Aug 2011
Publication number201110240631.7, CN 102305188 A, CN 102305188A, CN 201110240631, CN-A-102305188, CN102305188 A, CN102305188A, CN201110240631, CN201110240631.7
Inventors朱丽, 王一平, 黄群武
Applicant天津大学
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Multi-rotor wind generating system capable of automatically facing wind
CN 102305188 A
Abstract
The invention discloses a multi-rotor wind generating system capable of automatically facing wind. The multi-rotor wind generating system comprises a tower 1, beams 5, wind turbines, an A slewing bearing 2, a B slewing bearing 3, a framework 4 and tail vanes 8, wherein the A slewing bearing is arranged on the top of the tower; the B slewing bearing is arranged in the middle of the tower; inner rings of the A slewing bearing and the B slewing bearing are fixed on the tower; the framework is fixedly connected to outer rings of the A slewing bearing and the B slewing bearing; one end of each beam is connected with the framework; the wind turbines are fixedly connected with the beams; each wind turbine comprises a wind wheel 6 and a cabin 7; the beams on two sides of the framework have the same length; beams on one side of the framework are provided with more wind turbines than beams on the other side of the framework; and the tail vanes are connected with the framework, the beams or/and cabins through pin rolls. The multi-rotor wind generating system has the advantages that: blades have long service life, the occupied area is small, the installation and maintenance cost is low, the reliability is high, the application range is wide, a slewing bearing or a rotary driving device in the cabin is eliminated, and automatic wind facing and yawing are realized.
Claims(9)  translated from Chinese
1.能自动对风的多转子风力发电系统,包括塔架(1)、梁(和风力机,其特征是还包括A回转轴承(2)、B回转轴承(3)、框架⑷和尾舵⑶,所述A回转轴承设置在所述塔架顶部,所述B回转轴承设置在所述塔架的中部,所述A回转轴承和B回转轴承的内圈固定在塔架上,所述框架固定连接在所述A回转轴承和所述B回转轴承的外圈上,所述梁的一端与所述框架连接,所述风力机与所述梁固定连接,所述风力机包括风轮(6)和机舱(7),所述风力机为2-100个,所述框架两侧的梁的长度相等,框架一侧的梁上设置的风力机的数量比另一侧的梁上设置的风力机的数量多1-20个,所述尾舵与所述框架、所述梁或/和所述机舱通过销轴进行连接。 1. automatic multi-rotor wind wind power generation system comprising a tower (1), the beam ( and wind machine, characterized by further comprising A rotary bearing (2), B rotary bearing (3), and end frame ⑷ rudder ⑶, the A slew bearing is provided in the top of the tower, the slewing bearing B is set in the middle of the tower, the A and B swing bearing rotary bearing inner ring fixed to the tower, the frame fixedly connected to the swing bearing the A and the B rotary bearing outer ring, one end of the beam connected to the frame, the wind turbine is fixedly connected to the beam, the wind turbine comprises a wind wheel ( 6) and the nacelle (7), the wind turbine is 2-100, the frame on both sides of the length of the beam is equal to the number of wind turbine side of the frame beam settings than the other side of the beam settings more than the number of wind turbines of 1 to 20, the rudder and the frame, the beam and / or the nacelle are connected by a pin.
2.根据权利要求1所述的能自动对风的多转子风力发电系统,其特征是所述框架为平面结构或空间立体结构,组成框架的杆为方管、圆管、工字钢、槽钢、方钢、圆钢或角钢。 The automatic multi-rotor wind power wind power generation system as claimed in claim 1, characterized in that the frame is planar or spatial three-dimensional structure, rods framework for the tube, pipe, beam, channel steel, square steel, round or angle.
3.根据权利要求1所述的能自动对风的多转子风力发电系统,其特征是所述尾舵的数目为1-100个。 According to claim automatic multi-rotor wind wind power system of claim 1, wherein the number of said rudder is 1-100.
4.根据权利要求1所述的能自动对风的多转子风力发电系统,其特征是所述风力机为迎风式。 4. The automatic multi-rotor wind power wind power generation system as claimed in claim 1, characterized in that the wind turbine windward style.
5.根据权利要求1所述的能自动对风的多转子风力发电系统,其特征还包括桅(9),所述桅的一端连接在所述塔架上。 According to claim automatic multi-rotor wind wind power generation system of claim 1, characterized by further comprising the mast (9), connected to one end of the masts on the tower.
6.根据权利要求5所述的能自动对风的多转子风力发电系统,其特征是所述桅为3-40个。 6. The automatic multi-rotor wind wind power generation system according to claim 5, characterized in that the masts of 3-40 months.
7.根据权利要求1所述的能自动对风的多转子风力发电系统,其特征是还包括中间回转轴承(10),所述中间回转轴承位于A回转轴承和B回转轴承之间,所述中间回转轴承的内圈固定在塔架上,所述中间回转轴承的外圈与所述框架固定连接,所述中间回转轴承的数目为1-10个。 7. The automatic multi-rotor wind wind power system of claim 1, characterized by further comprises an intermediate rotary bearing (10), the intermediate rotary bearing on the A and B slewing bearing slewing bearing claim between the intermediate rotating bearing inner ring fixed to the tower, the intermediate rotating outer ring bearing fixedly connected to the frame, the number of rotation of the intermediate bearing 1-10.
8.根据权利要求1或4所述的能自动对风的多转子风力发电系统,其特征是所述风力机的功率为0. 5〜500kffo 8. The automatic multi-rotor wind wind power generation system of claim 1 or 4, characterized in that the power of the wind turbine is 0. 5~500kffo
9.根据权利要求8所述的能自动对风的多转子风力发电系统,其特征是所述风力机的功率为2〜lOOkW。 According to claim 8, wherein the automatic multi-rotor wind wind power generation system, characterized in that the power of the wind turbine is 2~lOOkW.
Description  translated from Chinese

能自动对风的多转子风力发电系统 Automatic multi-rotor wind wind power generation system

技术领域 Technical Field

[0001] 本发明属于风能利用领域,涉及能自动对风的多转子风力发电系统。 [0001] The present invention belongs to the field of wind energy use, involving automatic multi-rotor wind wind power generation system. 背景技术 Background

[0002] 随着世界性能源危机和全球环境污染加剧,许多国家都更加重视洁净的可再生能源的研究、开发和利用。 [0002] As the worldwide energy crisis and global environmental pollution, many countries pay more attention to clean and renewable energy research, development and utilization. 全球风能理事会指出,风力发电技术相比其它可再生能源技术而言更成熟,其效率也更高,产业前景最好,其开发利用增长率远高于常规能源,风力发电技术是世界上发展最快的可再生能源技术之一。 Global Wind Energy Council pointed out, wind power technology is more mature compared to other renewable energy technologies, its efficiency is higher, the best prospects for the industry, the exploitation rate of growth is much higher than conventional energy, wind power technology is the world's development One of the fastest growing renewable energy technologies.

[0003] 风轮是风能转换为机械能的核心部件,因此叶片的性能决定风电机组的性能,叶片在设计寿命期内的安全稳定运行至关重要。 [0003] The wind turbine is a core component of the wind energy into mechanical energy, and therefore the performance of critical decisions blade wind turbine performance, blade design lifetime in the safe and stable operation. 水平轴风力发电机的叶片在旋转过程中,受水平推力、惯性力和重力的综合作用。 During the rotation, by the horizontal thrust, inertia force and gravity combined effect of horizontal axis wind turbine blade. 受风切变影响,水平推力的大小始终变化,无论对叶片还是传动系统和塔架都产生大的交变载荷;惯性力的方向随时变化;重力在叶片根部产生一个与旋转频率同频率的交变载荷。 Windshear affected by changes in the size of the horizontal thrust is always, regardless of the blade or the drive train and the tower are a large alternating load; inertia force change direction at any time; gravity produces a rotational frequency of the same frequency alternating in the blade root Variable load. 上述三个交变载荷以及由此产生的振动是叶片破坏的主要原因。 The three alternating loads and vibrations resulting blade failure is the main cause.

[0004] 风力发电机单机功率越做越大,目前国际上比较一致的看法是:单机功率越大, 成本越低,其原因是一般认为风力机功率越大,所需的风力机数目越少,需要维修的部件越少,成本越低。 [0004] wind generator stand-alone power bigger and bigger, currently the more consistent view is: the larger the single power, the lower the cost, the reason is generally believed that the larger the wind turbine power, the less the required number of wind turbines the less need of repair parts, the lower the cost.

[0005] 实际上,由于受建筑物和地面的摩擦作用,随着高度的增加,风速逐渐增大,这种现象称之为风切变,叶片在回转平面内处于不同位置时,风速会有差异,因而在回转平面垂直方向上叶片承受的水平推力和回转力矩的大小会不同,导致叶片受到疲劳载荷。 [0005] In fact, due to the friction of buildings and grounds, with increasing height, wind speed increases, a phenomenon known as wind shear, the blades in the plane of rotation in a different position, wind speed there differences, therefore in a plane perpendicular to the direction of rotation of the blade to withstand horizontal force and rotational torque of size will be different, resulting in leaves by fatigue loads. 同时,重力也会在叶片上产生交变载荷。 At the same time, gravity will produce alternating loads on the blades. 因此,叶片越长,重量越重,受风切变和重力载荷的影响越大,导致叶片所承受的交变载荷越大,叶片越容易发生破坏。 Thus, the longer the blade, the heavier the weight, the greater the influence of wind shear and gravity loads, leading to greater blades withstand alternating loads, leaves more prone to damage. 目前,大型风力发电机叶片破坏的报道还不多见,主要是因为安装时间短,问题还没有完全暴露,若干年后,也许会大面积爆发。 Currently, large-scale wind turbine blade damage report also rare, mainly because of short installation time, the problem has not been fully exposed, after some years, may be a large-scale outbreak. 一旦出现问题,风电场由于停机、停电造成经济损失,再算上维修、吊装及更换零部件、超限运输、重复安装等等花费,加之风机大多安装在偏远或者交通不便的地区,吊装拆卸难度大,最后付出的代价巨大。 If there are problems, due to the shutdown of wind farms, power outages caused economic losses, and then count the cost of repairs, lifting and replacement parts, load transportation, repeat the installation and so on, plus the fans are mostly installed in remote or inaccessible areas, lifting disassembly difficulty big, huge price paid last. 因此,虽然风电机组的制造成本随功率增加而降低,但考虑到后期的维修等费用,其总成本反而会上升。 Thus, while the production cost of wind turbine power increases with the decrease, but taking into account maintenance and other expenses late, but the total cost will rise. 另一方面,巨型风电机组其叶片长度将达到60-70m,陆上运输、安装极为困难,安装用的吊车容量将超过1200-1400t,很多地区不具备这个条件,从而限制了巨型风电机组的使用。 On the other hand, its giant wind turbine blade length will reach 60-70m, land transport, installation is very difficult, with a crane installed capacity will exceed 1200-1400t, many areas do not have this condition, which limits the use of giant wind turbines .

[0006] 户外工作的风力机有一定的额定工作风速,当风速低于额定风速时,为了使发电量最大化,需要使风轮迎风,而当风速高于额定风速,为了保护风力机,需要进行偏航。 [0006] working outdoors wind turbines have a rated operating speed, when the wind speed is less than the rated wind speed, in order to maximize the amount of electricity needed to make wind round the wind, but when the wind speed is higher than the rated wind speed, in order to protect the wind turbine, need conduct yaw.

[0007] 目前通常使用回转驱动装置,时刻监测风速,随时进行调向,回转驱动装置不仅工作条件较差,而且成本高。 [0007] There are currently commonly used rotary drive unit, always monitor wind speed, at any time to adjust, the rotary drive unit not only poor working conditions, and high cost.

发明内容 DISCLOSURE

[0008] 本发明的目的是克服现有技术中存在的不足,提供能自动对风的多转子风力发电系统。 [0008] The object of the present invention to overcome the deficiencies in the prior art, providing automatic multi-rotor wind wind power generation system.

[0009] 本发明的技术方案概述如下: [0009] The aspect of the present invention is summarized as follows:

[0010] 能自动对风的多转子风力发电系统,包括塔架1、梁5和风力机,还包括A回转轴承2、B回转轴承3、框架4和尾舵8,A回转轴承设置在塔架顶部,B回转轴承设置在塔架的中部,A回转轴承和B回转轴承的内圈固定在塔架上,框架固定连接在A回转轴承和B回转轴承的外圈上,梁的一端与框架连接,风力机与梁固定连接,风力机包括风轮6和机舱7,风力机为2-100个,框架两侧的梁的长度相等,框架一侧的梁上设置的风力机的数量比另一侧的梁上设置的风力机的数量多1-20个,尾舵与框架、梁或/和机舱通过销轴进行连接。 [0010] automatic multi-rotor wind wind power systems, including a tower 1, the beam 5 and the wind turbine, including A swing bearing 2, B slewing bearing 3, 4 and rudder frame 8, A swing bearing provided at the tower top shelf, B slewing bearing is provided in the middle of the tower, A and B swing bearing rotary bearing inner ring fixed to the tower frame fixedly connected to the A and B slewing bearing slewing bearing outer ring, one end of the beam to the frame connected wind turbine is fixedly connected with the beam, the wind turbine including the rotor 6 and 7 cabin, the wind turbine is 2-100, the length of the frame on both sides of the beam is equal to the number of wind turbines beam frame than the other side of the set number of wind turbines set up a multi-beam side of 1-20, rudder frame, beams and / or the nacelle are connected through pin.

[0011] 框架为平面结构或空间立体结构,组成框架的杆为方管、圆管、工字钢、槽钢、方钢、圆钢或角钢。 [0011] framework for the plane structure or three-dimensional spatial structure, composition frame rod to the tube, pipe, beams, channels, square steel, round or angle.

[0012] 尾舵的数目为1-100个。 [0012] The number is 1-100 rudder.

[0013] 风力机为迎风式。 [0013] The wind turbine windward style.

[0014] 本发明还可以包括桅9,桅的一端连接在所述塔架上。 [0014] The present invention may also include a 9-mast, the mast is connected to one end of the tower.

[0015]桅为 3-40 个。 [0015] Mast is 3-40.

[0016] 本发明还可以包括中间回转轴承10,中间回转轴承位于A回转轴承和B回转轴承之间,中间回转轴承的内圈固定在塔架上,中间回转轴承的外圈与框架固定连接,中间回转轴承的数目为1-10个。 [0016] The present invention may also include an intermediate swing bearing 10, intermediate swing bearing located between A and B slewing bearing slewing bearings, slewing bearing inner ring fixed to the middle of the tower in the middle of the rotation of the outer ring of the bearing is fixedly connected to the frame, the number of intermediate rotary bearings 1-10.

[0017] 风力机的功率为优选0. 5〜500kW,最好是2〜lOOkW。 Power [0017] The wind turbine is preferably 0. 5~500kW, preferably 2~lOOkW.

[0018] 本发明的优点和积极效果是: [0018] The advantages and the positive effect of the present invention are:

[0019] (1)叶片寿命长。 [0019] (1) long blade life. 本发明的上部塔架上安装多个中、小型风力机,其叶片短,在高度方向上受风切变影响小,短叶片的疲劳载荷小,同时短叶片的制造技术成熟,性能稳定,因而叶片的寿命长。 Installed on the upper part of the tower of the present invention, a plurality of the small wind turbine, its blades short, in the vertical direction by the wind shear is small, small fatigue load short blades while short blade manufacturing technology is mature, stable, and thus long life of the blades.

[0020] (2)占地面积小。 [0020] (2) small footprint. 考虑到尾流的影响,现有技术的普通风电机组在安装时要相隔一定的距离,而本发明的在一个塔架上的多个风力机仅仅需要考虑风力机侧向的相互影响, 大大节省了占地面积。 Taking into account the impact of the wake, the prior art ordinary wind turbine installation to be spaced at a distance, while on a tower of more wind machine of the present invention need only consider the interaction of wind turbine side, saving the footprint. 同时,中、小型机组的尾流影响距离短,在风电场内可以布置更多本发明,有利于提高风电场的总装机容量,提高风电场的经济效益。 At the same time, the end of the stream, a short distance from the impact of small units in the wind farm can be arranged more the present invention, it is beneficial to increase the total installed capacity of wind farms, improve the economic efficiency of wind farms.

[0021] (3)独特的安装方式。 [0021] (3) Unique installation. 本发明的塔架连接有梁,在正常使用时,作为风力机的安装结构,在安装和维修时梁可以作为吊支架,不需要或者仅需要小型起吊机械就可以进行设备安装与拆装,有效降低安装维修成本。 The tower of the present invention is connected to the beam, in normal use, as the structure of the wind turbine installation, the installation and maintenance of the beam can be used as hanging brackets, no or only small-scale mechanical lifting equipment installation can be carried out with disassembly, effective reduce installation and maintenance costs.

[0022] (4)维修成本低。 [0022] (4) low maintenance costs. 主要体现在以下几个方面:一是由于采用中、小型风力机,其叶片不仅短而且重量轻,运输方便和更换简便;二是规模化效益高,利于集成化和模块化和规模化,降低生产成本,提高经济效益;三是中、小型风力机技术成熟,零部件价格便宜。 Mainly in the following aspects: First, thanks to the small wind turbine, which leaves only a short and lightweight, easy to transport and easy to replace; the second is the scale of effective, integrated and modular and conducive to large-scale, lower production costs, improve economic efficiency; third, the small wind turbine technology is mature, low component prices.

[0023] (5)系统的可靠性好。 [0023] good reliability (5) of the system. 本发明由于采用的是在一个塔架上布置多个风力机的方式, 当单个或某几个风力机发生故障,不会对其他风力机产生影响,系统仍然能够基本保持正常运转。 As a result of the present invention is arranged in a plurality of wind turbine tower the way, when a single or several wind turbine malfunction, will not have an impact on other wind turbine system is still able to basically maintain the normal operation. 风电场的风力机数目更多,单个风力机发生故障对系统和电网的影响微乎其微。 The number of wind turbine wind farm more impact on the system and the failure of a single wind turbine grid occurs is minimal.

[0024] (6)应用范围广。 [0024] (6) a wide range of applications. 与大型和巨型风电机组相比,本发明由于采用中、小型风力机,无论是对风场条件、地理位置还是占地面积的要求要低的多,大大拓展了本系统的应用范围。 Compared with large and giant wind turbines, the present invention adopts, the small wind turbine, both for wind conditions, the geographical area or the requirements to be much lower, greatly expand the scope of application of this system.

[0025] (7)由于在塔架的顶部和中部各布置了一个回转轴承,在承受风产生的水平推力作用不会对两个回转轴承产生弯矩,与现有技术的普通风电机组相比,回转轴承的受力情况大为改善。 [0025] (7) Since the tower's top and middle of the layout of a rotary bearing, horizontal thrust to withstand winds of no moment to the two rotary bearings, compared to prior art conventional wind turbines , the forces slewing bearing greatly improved.

[0026] (8)自动对风、偏航和安全保护。 [0026] (8) Automatic wind, yaw and security. 尾舵在风速小于额定风速时产生的回转力矩驱动B回转轴承以上部分进行对风。 Rudder rotational torque less than the rated wind speed at the wind speed of the drive to produce more B rotating bearing part of the wind. 不对称布置的风力机在风速大于额定风速时产生的回转力矩驱动B回转轴承以上部分进行偏航。 Asymmetrical arrangement of rotational torque generated by the wind turbine when the wind speed is greater than the rated wind speed drive B rotation yaw bearing the above parts.

[0027] (9)不需要驱动装置。 [0027] (9) driving means is not required. 由于结构的对风、偏航和安全保护通过尾舵都可以实现,因此不需要再设置液压式或电机驱动式的回转驱动装置。 Due to the structure of the wind, yaw, and security can be achieved through the rudder, so no settings or motor-driven hydraulic rotary drive.

附图说明 Brief Description

[0028] 图1为能自动对风的多转子风力发电系统的示意图。 [0028] FIG. 1 is able to automatically wind the multiple rotor wind power system schematic.

[0029] 图2为能自动对风的多转子风力发电系统另一种形式的示意图。 [0029] 2 is another form of automatic multi-rotor wind wind power generation system schematic diagram.

[0030] 图3为能自动对风的多转子风力发电系统的俯视示意图。 [0030] FIG. 3 is able to automatically wind the multiple rotor wind power generation system schematic plan view.

[0031] 图4为能自动对风的多转子风力发电系统另一种形式的俯视示意图。 [0031] FIG. 4 is another form of automatic multi-rotor wind wind power generation system schematic plan view.

具体实施方式 DETAILED DESCRIPTION

[0032] 以下结合附图对本发明的实施做进一步详述,以下详述只是描述性的,不是限定性的,不能限定本发明专利的保护范围。 [0032] the following with reference to the embodiment of the present invention will be described in further detail, the following detailed description merely descriptive, not restrictive, the scope of the present invention is not limited to patent protection.

[0033] 能自动对风的多转子风力发电系统,包括塔架1、梁5和风力机,还包括A回转轴承2、B回转轴承3、框架4和尾舵8,A回转轴承设置在塔架顶部,B回转轴承设置在塔架的中部,A回转轴承和B回转轴承的内圈固定在塔架上,框架固定连接在A回转轴承和B回转轴承的外圈上,梁的一端与框架连接,风力机与梁固定连接,风力机包括风轮6和机舱7,风力机为2-100个,框架两侧的梁的长度相等,框架一侧的梁上设置的风力机的数量比另一侧的梁上设置的风力机的数量多1-20个,尾舵与框架、梁或/和机舱通过销轴进行连接。 [0033] automatic multi-rotor wind wind power systems, including a tower 1, the beam 5 and the wind turbine, including A swing bearing 2, B slewing bearing 3, 4 and rudder frame 8, A swing bearing provided at the tower top shelf, B slewing bearing is provided in the middle of the tower, A and B swing bearing rotary bearing inner ring fixed to the tower frame fixedly connected to the A and B slewing bearing slewing bearing outer ring, one end of the beam to the frame connected wind turbine is fixedly connected with the beam, the wind turbine including the rotor 6 and 7 cabin, the wind turbine is 2-100, the length of the frame on both sides of the beam is equal to the number of wind turbines beam frame than the other side of the set number of wind turbines set up a multi-beam side of 1-20, rudder frame, beams and / or the nacelle are connected through pin.

[0034] 框架为平面结构或空间立体结构,组成框架的杆为方管、圆管、工字钢、槽钢、方钢、圆钢或角钢。 [0034] The frame structure is flat or three-dimensional spatial structure, composition frame rod to the tube, pipe, beams, channels, square steel, round or angle.

[0035] 尾舵的数目为1-100个。 [0035] The number is 1-100 rudder.

[0036] 风力机为迎风式。 [0036] wind turbine for the wind type.

[0037] 本发明还可以包括桅9,桅的一端连接在所述塔架上。 [0037] The present invention may also include a 9-mast, the mast is connected to one end of the tower.

[0038]桅为 3-40 个。 [0038] Mast is 3-40.

[0039] 本发明还可以包括中间回转轴承10,中间回转轴承位于A回转轴承和B回转轴承之间,中间回转轴承的内圈固定在塔架上,中间回转轴承的外圈与框架固定连接,中间回转轴承的数目为1-10个。 [0039] The present invention may also include an intermediate swing bearing 10, intermediate swing bearing located between A and B slewing bearing slewing bearings, slewing bearing inner ring fixed to the middle of the tower in the middle of the rotation of the outer ring of the bearing is fixedly connected to the frame, the number of intermediate rotary bearings 1-10.

[0040] 风力机的功率为优选0. 5〜500kW,最好是2〜lOOkW。 Power [0040] wind turbine is preferably 0. 5~500kW, preferably 2~lOOkW.

[0041] 本发明专利的工作原理为: [0041] The present invention patent works as follows:

[0042] 当风速达到风力机的启动风速时,风力机开始转动工作,产生的电能转换成与电网同频同相的电后连接到电网上进行并网发电,或输送到蓄能系统进行储能。 [0042] When the wind speed reaches start wind speed wind turbine, wind turbine starts rotating work, electrical energy generated is converted into the same frequency and phase after electrically connected to the grid to electricity grid online, or delivered to the storage system storage . 尾舵在风速小于额定风速时产生的回转力矩驱动B回转轴承以上部分进行对风,不对称布置的风力机在风速大于额定风速时产生的回转力矩驱动B回转轴承以上部分进行偏航。 Rudder rotational torque less than the rated wind speed at the wind speed of the drive to produce more B rotating bearing part of the wind, the asymmetric arrangement of the rotational torque generated by the wind turbine when the wind speed is greater than the rated wind speed drive B rotation yaw bearing the above parts.

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Classifications
International ClassificationF03D9/00, F03D1/02, F03D7/04, F03D11/00
Cooperative ClassificationF03D1/02, Y02E10/725
Legal Events
DateCodeEventDescription
4 Jan 2012C06Publication
22 Feb 2012C10Entry into substantive examination
18 Sep 2013C02Deemed withdrawal of patent application after publication (patent law 2001)