CN203239485U - Bulb through-flow turbine used for micro waterhead power station - Google Patents
Bulb through-flow turbine used for micro waterhead power station Download PDFInfo
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Abstract
Description
技术领域:Technical field:
本实用新型属于流体机械的水力发电设备技术领域,特别是涉及一种用于微水头电站的灯泡贯流式水轮机。 The utility model belongs to the technical field of hydraulic power generation equipment of fluid machinery, in particular to a bulb tubular water turbine used in a micro-head power station.
背景技术:Background technique:
随着世界各国的高水头水力资源逐渐开发罄尽,各国都不约而同地把目光转向了低水头水力资源。目前我国已开发或正在开发的低水头水电站的应用水头都在2.5m以上,同时我国2.5m以下的微水头水力资源也极其丰富,有千万kW数量级的资源量可供开发利用,且微水头水力资源大多处于经济发达地区,对其形成的电力输送具有不可比拟的优越性。 As the high-head hydropower resources in various countries in the world are gradually exhausted, all countries have turned their attention to low-head hydropower resources. At present, the applied water heads of the low-head hydropower stations that have been developed or are being developed in my country are all above 2.5m. Most of the hydropower resources are located in economically developed areas, which have incomparable advantages in the power transmission formed by them.
目前为止,采用筑坝集能发电的传统水电开发方式和技术已非常成熟,对这种开发方式及所对应的发电设备来说,水头越高经济性越好而越有开发价值,反之则水头越低经济性越差以致从经济角度导致无开发价值。学界通常认为微水头水力资源开发的经济性很差,基本上无开发价值。其主要原因在于,传统开发方式所需建造的大坝、水道及发电厂房的费用及传统开发方式所造成较大的土地淹没和人口的迁移的费用会占到整个工程的很大一部分。对微水头水力资源来说,由于其能量密度较低、单点发电(装机)规模较小,若采用传统开发方式与装备,则难以承受造价昂贵的土建、淹没赔偿及装备等费用。 So far, the traditional hydropower development method and technology of dam-building energy-collecting power generation have been very mature. For this development method and the corresponding power generation equipment, the higher the water head, the better the economic efficiency and the more development value, and vice versa. The lower the economy, the worse it will lead to no development value from an economic point of view. The academic circles generally believe that the development of micro-head hydropower resources is very economical and basically has no development value. The main reason is that the cost of the dams, waterways and power plants required by the traditional development method and the large land submersion and population migration costs caused by the traditional development method will account for a large part of the entire project. For micro-head hydropower resources, due to their low energy density and small scale of single-point power generation (installed capacity), if traditional development methods and equipment are used, it is difficult to bear the cost of expensive civil works, inundation compensation, and equipment.
中国专利申请88218302.8提出了“一种微小型水轮机” ,由金属机壳的上盖板、进水管、机壳、尾水管共同组成封闭式连通体结构,只要流量足够大,进水管进口处的水头压力几乎全部可作用于叶轮上,效率可比敞开式机壳的水轮机提高10%左右,且无需构筑拦坝、水槽等水工建筑,只要0.7米以上水头将地脚固定便可使用,造价较低、安装方便。该方案存在的主要不足是,该水轮机结构接近于混流式水轮机,但没有混流式水轮机的蜗壳,因此水流流态比较紊乱,通过导流盘即类似于混流式水轮机的导叶机构流入叶轮区,整个流动过程中水流流向一直在改变,从而导致过流量较小,且流动过程中产生的摩擦、撞击、涡流、脱流等水头损失均会对做功能力产生影响,使其输出功率较小。 Chinese patent application 88218302.8 proposes "a kind of miniature water turbine", which is composed of the upper cover plate of the metal casing, the water inlet pipe, the casing, and the draft pipe to form a closed connected body structure. As long as the flow rate is large enough, the water head at the inlet of the water inlet pipe Almost all the pressure can act on the impeller, and the efficiency can be increased by about 10% compared with the open casing turbine, and there is no need to build hydraulic structures such as dams and tanks. It can be used as long as the water head is above 0.7 meters and the feet are fixed, and the cost is low. , Easy to install. The main disadvantage of this scheme is that the structure of the turbine is close to that of a Francis turbine, but there is no volute of a Francis turbine, so the flow state of the water is relatively turbulent, and it flows into the impeller area through the deflector, which is similar to the guide vane mechanism of the Francis turbine. , the flow direction of the water flow has been changing throughout the flow process, resulting in a small flow rate, and the friction, impact, eddy current, shedding and other head losses during the flow process will affect the working ability and make the output power smaller .
中国专利申请95103906.7提出了“一种低微水头下高效灌流式水轮机” ,采用水轮体分轮段而统一补换气却相对独立闭合使得水头重力流过半墙“巷”而获重力能并通过系统有机补换气行为又使空腔回复的轮叶获生浮势能,以此提高作为低微水头水轮机无功出力的水能转换效率达到95%。该方案存在的主要不足是,因获重力能以及获浮势能的方式为补换气,不能使水流连续并顺畅的通过并对叶轮做功,使其过流能力较弱,导致输出功率较小;且其结构复杂,制造成本较高;同时,其输出的是水轮机无功出力(无功功率),仅适用于在电气设备中建立和维持磁场,无法用于以一般建设运行的以有功功率、无功功率一起输出,并以有功功率输出为主的水电站。 Chinese patent application 95103906.7 proposes "a kind of high-efficiency perfusion turbine under low water head", which adopts the sub-wheel section of the water wheel body and uniformly supplements the ventilation but is relatively independent closed so that the gravity of the water head flows through the half-wall "lane" to obtain gravity energy and pass through the system The behavior of organic supplementary air exchange makes the blades restored by the cavity obtain the buoyant potential energy, so as to improve the water energy conversion efficiency as the reactive output of the low-head water turbine to 95%. The main disadvantage of this solution is that because the method of obtaining gravity energy and buoyancy potential energy is supplementary air exchange, the water flow cannot pass through continuously and smoothly and do work on the impeller, making its flow capacity weak, resulting in a small output power; Moreover, its structure is complex and its manufacturing cost is high; at the same time, its output is the reactive output (reactive power) of the water turbine, which is only suitable for establishing and maintaining a magnetic field in electrical equipment, and cannot be used for general construction and operation with active power, A hydropower station that outputs reactive power together and mainly outputs active power.
目前,微水头水力资源基本上处于未开发状态,也未引起人们的重视。在我国能源资源相对紧缺的情况下,想方设法降低部分工程造价,以提高这部分水利资源的经济开发价值,在尽量减少对环境的影响下增加清洁能源供应,从而实现高效和环保开发水力资源的目的是本流体机械的水力发电设备技术领域中亟待解决的重大难题之一。 At present, the micro-water head hydropower resources are basically in an undeveloped state, and have not attracted people's attention. In the case of relative shortage of energy resources in our country, try to reduce the cost of some projects in order to increase the economic development value of this part of water resources, increase the supply of clean energy while minimizing the impact on the environment, so as to achieve the purpose of efficient and environmentally friendly development of water resources It is one of the major problems to be solved urgently in the technical field of hydroelectric power generation equipment of the fluid machinery.
发明内容:Invention content:
本实用新型的目的是为克服现有技术的不足而提供一种用于微水头电站的灯泡贯流式水轮机,它能够高效利用0.6m-2.5m的微水头水力资源,具有水能转换效率高、工程造价及装备成本低的优点,适用于对各种自然环境下的微水头水力资源的开发利用。 The purpose of the utility model is to overcome the deficiencies of the prior art and provide a bulb tubular water turbine for a micro-head power station, which can efficiently utilize the micro-head hydraulic resources of 0.6m-2.5m, and has high water energy conversion efficiency , The advantages of low engineering cost and equipment cost are suitable for the development and utilization of micro-head hydraulic resources in various natural environments.
根据本实用新型提出的一种用于微水头电站的灯泡贯流式水轮机,包括进水管、灯泡段、转轮室和尾水管,其中,灯泡段中设有灯泡体,灯泡体由固定支撑撑起,灯泡体连接转轮室中水轮机的主轴,主轴连接转轮,转轮由轮毂、泄水锥及轮毂上沿圆周方向平均分布叶片组成,其特征在于所述的进水管的进口呈三面扩张型,灯泡体直径D0与转轮直径D1的比值即灯泡比为0.58~0.65,固定支撑为对称型支撑或非对称型支撑,所述的对称型支撑为设置于竖直方向上的随水流方向由圆弧形收缩至尖角的对称分布支撑,非对称型支撑为设置于竖直方向上的由圆弧形收缩至尖角的正曲度支撑与水平方向上的正曲度翼型支撑的结合。 According to the utility model, a bulb tubular water turbine for a micro-head power station includes a water inlet pipe, a bulb section, a runner chamber and a draft tube, wherein a bulb body is arranged in the bulb section, and the bulb body is supported by a fixed support. From the beginning, the bulb body is connected to the main shaft of the water turbine in the runner chamber, and the main shaft is connected to the runner. The runner is composed of a hub, a water discharge cone, and blades evenly distributed along the circumferential direction on the hub. It is characterized in that the inlet of the water inlet pipe is expanded on three sides. type, the ratio of the diameter of the bulb body D 0 to the diameter of the runner D 1 , that is, the bulb ratio is 0.58 to 0.65, and the fixed support is a symmetrical support or an asymmetrical support, and the symmetrical support is a random support arranged in the vertical direction. The water flow direction shrinks from a circular arc to a sharp corner, and the asymmetrical support is a positive curvature support that shrinks from a circular arc to a sharp corner in the vertical direction and a positive curvature airfoil in the horizontal direction A combination of supports.
本实用新型进一步的优选方案为:所述的进水管的底部为平面,进水管长度L1与转轮直径D1的比值为1.30~1.50,进水管进口宽度B1与转轮直径的比值为2.40~2.55,进水管进口高度H1与转轮直径D1的比值为1.70~1.85;所述的灯泡段的长度L2与转轮直径D1的比值为1.80~2.40,灯泡段进口宽度B2与转轮直径D1的比值为1.40~1.60,灯泡段进口高度H2与转轮直径D1的比值为1.20~1.40;所述的对称分布支撑贯穿灯泡体,对称分布支撑的长度L5与转轮直径D1的比值为0.70~0.85,对应的转轮的叶片安放角为26°,单位转速为160~215r/min;所述的正曲度支撑的长度L6与转轮直径D1的比值为0.80~0.90,正曲度翼型支撑长度L7与转轮直径D1的比值为0.35~0.45,对应的转轮的叶片安放角为28°,单位转速为160~215r/min;所述的转轮室长度L3与转轮直径D1的比值为0.35~0.40,轮毂直径Dh与转轮直径D1的比值即轮毂比为0.28~0.35,转轮的叶片为不对称扭曲叶片,叶片数量为3片;所述的尾水管进口直径D2为直径的圆柱面所截圆柱面上轮缘侧叶片的叶栅稠密度 2为0.60~0.70,以轮毂直径Dh为直径的圆柱面所截圆柱面上轮毂侧叶片的叶栅稠密度 h为1.40~1.50;所述的尾水管长度L4与转轮直径D1的比值为2.30~2.80,尾水管进口直径D2与转轮直径D1的比值为0.95~0.99,尾水管直锥段出口直径D3与转轮直径D1的比值为1.05~1.15,尾水管出口宽度B3与转轮直径D1的比值为1.30~1.35,尾水管出口高度H3与转轮直径D1的比值为1.15~1.30。 A further preferred solution of the present utility model is: the bottom of the water inlet pipe is a plane, the ratio of the length L1 of the water inlet pipe to the diameter D1 of the runner is 1.30 to 1.50, and the ratio of the width B1 of the inlet pipe to the diameter of the runner is 2.40-2.55, the ratio of the inlet height H 1 of the water inlet pipe to the diameter D 1 of the runner is 1.70-1.85; the ratio of the length L 2 of the bulb section to the diameter D 1 of the runner is 1.80-2.40, the width of the bulb section inlet B The ratio of 2 to the diameter of the runner D1 is 1.40 to 1.60, and the ratio of the height of the bulb segment inlet H2 to the diameter of the runner D1 is 1.20 to 1.40; the symmetrically distributed support runs through the bulb body, and the length of the symmetrically distributed support is L5 The ratio to the runner diameter D 1 is 0.70-0.85, the corresponding runner blade placement angle is 26°, and the unit speed is 160-215r/min; the length L 6 of the positive curvature support and the runner diameter D The ratio of 1 is 0.80~0.90, the ratio of the positive curvature airfoil support length L 7 to the runner diameter D 1 is 0.35~0.45, the corresponding runner blade placement angle is 28°, and the unit speed is 160~215r/min The ratio of the runner chamber length L 3 to the runner diameter D 1 is 0.35 to 0.40, the ratio of the hub diameter D h to the runner diameter D 1 is 0.28 to 0.35, and the blades of the runner are asymmetric Twisted blades, the number of blades is 3; the diameter of the draft tube inlet D 2 is the cascade density of the blades on the rim side of the cylindrical surface crossed by the diameter of the cylinder 2 is 0.60~0.70, the cascade density of the hub side blade on the cylindrical surface cut by the cylindrical surface with the hub diameter D h as the diameter h is 1.40-1.50; the ratio of the draft tube length L 4 to the runner diameter D 1 is 2.30-2.80, the ratio of the draft tube inlet diameter D 2 to the runner diameter D 1 is 0.95-0.99, and the draft tube straight taper The ratio of section outlet diameter D 3 to runner diameter D 1 is 1.05-1.15, the ratio of draft tube outlet width B 3 to runner diameter D 1 is 1.30-1.35, and the ratio of draft tube outlet height H 3 to runner diameter D 1 The ratio is 1.15-1.30.
本实用新型与现有技术相比其显著优点为:一是本实用新型水轮机以管道集能开发方式取代了传统的拦河筑坝集能的开发方式,大大降低了工程造价,高效利用了我国资源极其丰富、且被认为无开发价值的微水头水力资源;二是本实用新型采用进口呈三面扩张型的进水管,产生进口涌浪,以提高水轮机的工作水头,可将0.6m-2.5m的微水头水流水能转化为动能,在单位流量(即换算到转轮直径为1m,有效水头为1m时的水轮机的实际有效流量)不低于3m3/s的情况下,水能转换效率可达75%以上,实现了对微水头水利资源的高效利用;三是本实用新型采用为定桨型转轮叶片,彻底革除了传统灯泡贯流式水轮机的活动导叶,从而减少了机组制造成本及后期的辅助设备的建设、运行成本;四是本实用新型既可通过设置竖直方向上的固定支撑,以尽可能的简化构造,降低成本;还可通过将革除活动导叶部分与固定支撑结合,采用正曲度形式,使其不仅有支撑灯泡体的功能,同时还能产生环量,发挥了提高水轮机叶片做功能力的作用;采用过流量较大的灯泡比和轮毂比,以增强水轮机过流量;采用直锥形及由圆至方的变化段结合的尾水管,回收水能并将水流导向下游。本实用新型适用于对各种自然环境下的0.6m-2.5m微水头水力资源的开发利用。 Compared with the prior art, the utility model has the following remarkable advantages: firstly, the utility model replaces the traditional energy-collecting development method of blocking rivers and building dams with the pipeline energy-collecting development method of the utility model, which greatly reduces the engineering cost and efficiently utilizes the The resource is extremely rich and is considered to be micro-head hydraulic resources with no development value; the second is that the utility model adopts the inlet pipe that expands on three sides to generate inlet surges to increase the working head of the turbine, which can increase the water head of 0.6m-2.5m The water energy of the micro-head water flow is converted into kinetic energy, and the water energy conversion efficiency is not less than 3m 3 /s under the condition that the unit flow rate (that is, the actual effective flow rate of the turbine when the diameter of the runner is 1m and the effective head is 1m) is not less than 3m 3 /s It can reach more than 75%, realizing the efficient utilization of micro-head water resources; third, the utility model adopts fixed paddle runner blades, which completely eliminates the movable guide vanes of traditional bulb tubular turbines, thereby reducing unit manufacturing. cost and the construction and operation costs of auxiliary equipment in the later stage; the fourth is that the utility model can simplify the structure as much as possible and reduce the cost by setting the fixed support in the vertical direction; The combination of support adopts positive curvature form, so that it not only has the function of supporting the bulb body, but also can generate circulation, which plays a role in improving the working ability of the turbine blades; adopting a large bulb ratio and wheel hub ratio with a large flow rate, so as to Enhance the flow rate of the water turbine; use the draft tube combined with the straight cone and the changing section from circle to square to recover the water energy and guide the water flow downstream. The utility model is suitable for the development and utilization of 0.6m-2.5m micro-head hydraulic resources in various natural environments.
附图说明:Description of drawings:
图1是本实用新型提出的对称型支撑灯泡贯流式水轮机的正视剖视示意图。 Fig. 1 is a front sectional schematic diagram of a symmetrical type supported bulb tubular water turbine proposed by the utility model.
图2是本实用新型提出的对称型支撑灯泡贯流式水轮机的俯视剖视示意图。 Fig. 2 is a schematic cross-sectional top view of the symmetrically supported bulb tubular water turbine proposed by the utility model.
图3是本实用新型提出的非对称型支撑灯泡贯流式水轮机的正视剖视示意图。 Fig. 3 is a front sectional schematic diagram of the asymmetrical bulb supporting tubular water turbine proposed by the utility model.
图4是本实用新型提出的非对称型支撑灯泡贯流式水轮机的俯视剖视示意图。 Fig. 4 is a top view cross-sectional schematic diagram of the asymmetrical bulb-supported tubular water turbine proposed by the utility model.
图5是本实用新型转轮结构示意图。 Fig. 5 is a structural schematic diagram of the runner of the present invention. the
图6是本实用新型转轮叶片组成平面叶栅图。 Fig. 6 is a plane cascade diagram of runner blades of the present invention.
图7是本实用新型非对称型支撑的正曲度支撑及正曲度翼型支撑结构示意图。 Fig. 7 is a schematic diagram of the positive curvature support and the positive curvature airfoil support structure of the asymmetric support of the present invention.
图8是本实用新型非对称型支撑的正曲度支撑及正曲度翼型支撑截面尺寸示意图。 Fig. 8 is a schematic diagram of the cross-sectional dimensions of the positive curvature support and the positive curvature airfoil support of the asymmetric support of the present invention.
具体实施方式:Detailed ways:
下面结合附图和实施例对本实用新型的具体实施方式作进一步的详细说明。 The specific implementation of the utility model will be further described in detail below in conjunction with the accompanying drawings and examples.
结合图1至图5,本实用新型提出的一种用于微水头电站的灯泡贯流式水轮机,包括进水管(1)、灯泡段(2)、灯泡体(3)、转轮室(4)、转轮(5)、尾水管(6)、主轴(7)、对称分布支撑(8)、正曲度支撑(9)和正曲度翼型支撑(10)、叶片(11)、轮毂(12)、泄水锥(13),在灯泡段(2)中设有灯泡体(3),灯泡体(3)由固定支撑撑起,灯泡体(3)连接转轮室(4)中水轮机的主轴(7),主轴(7)连接转轮(5),转轮(5)由轮毂(12)、泄水锥(13)及轮毂(12)上沿圆周方向平均分布叶片(11)组成,进水管(1)的进口呈三面扩张型,灯泡体(3)的直径D0与转轮(5)直径D1的比值即灯泡比为0.58~0.65,固定支撑为对称型支撑或非对称型支撑,对称型支撑为设置于竖直方向上的随水流方向由圆弧形收缩至尖角的对称分布支撑(8),非对称型支撑为设置于竖直方向上的由圆弧形收缩至尖角的正曲度支撑(9)与水平方向上的正曲度翼型支撑(10)的结合。 Combining Figures 1 to 5, the utility model proposes a bulb tubular turbine for a micro-head power station, including a water inlet pipe (1), a bulb section (2), a bulb body (3), and a runner chamber (4 ), runner (5), draft tube (6), main shaft (7), symmetrically distributed support (8), positive curvature support (9) and positive curvature airfoil support (10), blade (11), hub ( 12), the drain cone (13), the bulb body (3) is provided in the bulb section (2), the bulb body (3) is supported by a fixed support, the bulb body (3) is connected to the water turbine in the runner chamber (4) The main shaft (7), the main shaft (7) is connected to the runner (5), and the runner (5) is composed of the hub (12), the drain cone (13) and the uniformly distributed blades (11) along the circumferential direction on the hub (12) , the inlet of the water inlet pipe (1) is expanded on three sides, the ratio of the diameter D 0 of the bulb body (3) to the diameter D 1 of the runner (5), that is, the bulb ratio, is 0.58-0.65, and the fixed support is symmetrical or asymmetrical The symmetrical support is a symmetrically distributed support set in the vertical direction that shrinks from an arc to a sharp corner with the direction of water flow (8), and the asymmetric support is set in a vertical direction that shrinks from an arc to a sharp corner. Combination of positive curvature supports (9) to sharp corners and positive curvature airfoil supports (10) in the horizontal direction.
结合图1至图4,在本实用新型的技术方案中,所述的进水管(1)的底部为平面,进水管(1)长度L1与转轮(5)直径D1的比值为1.30~1.50,进水管(1)进口宽度B1与转轮(5)直径的比值为2.40~2.55,进水管(1)进口高度H1与转轮(5)直径D1的比值为1.70~1.85。 1 to 4, in the technical solution of the present utility model, the bottom of the water inlet pipe (1) is flat, and the ratio of the length L1 of the water inlet pipe ( 1 ) to the diameter D1 of the runner (5) is 1.30 ~1.50, the ratio of the inlet width B 1 of the water inlet pipe (1) to the diameter of the runner (5) is 2.40~2.55, the ratio of the inlet height H 1 of the water inlet pipe (1) to the diameter D 1 of the runner (5) is 1.70~1.85 .
结合图1至图5以及图7、图8,在本实用新型的技术方案中,所述的灯泡段(2)的长度L2与转轮(5)直径D1的比值为1.80~2.40,灯泡段(2)进口宽度B2与转轮(5)直径D1的比值为1.40~1.60,灯泡段(2)进口高度H2与转轮(5)直径D1的比值为1.20~1.40;所述的对称分布支撑(8)贯穿灯泡体(3),对称分布支撑(8)的长度L5与转轮(5)直径D1的比值为0.70~0.85,对应的转轮(5)的叶片(11)安放角为26°,单位转速为160~215r/min;所述的正曲度支撑(9)的长度L6与转轮(5)直径D1的比值为0.80~0.90,正曲度翼型支撑(10)长度L7与转轮(5)直径D1的比值为0.35~0.45,对应的转轮(5)的叶片(11)安放角为28°,单位转速为160~215r/min。 Combining Figures 1 to 5 and Figures 7 and 8, in the technical solution of the present utility model, the ratio of the length L 2 of the bulb segment (2) to the diameter D 1 of the runner (5) is 1.80-2.40, The ratio of the inlet width B 2 of the bulb section (2) to the diameter D 1 of the runner (5) is 1.40-1.60, and the ratio of the inlet height H 2 of the bulb section (2) to the diameter D 1 of the runner (5) is 1.20-1.40; The symmetrically distributed support (8) runs through the bulb body (3), the ratio of the length L5 of the symmetrically distributed support ( 8 ) to the diameter D1 of the runner (5) is 0.70-0.85, and the corresponding runner (5) The placement angle of the blade (11) is 26°, and the unit speed is 160-215r/min; the ratio of the length L 6 of the positive curvature support (9) to the diameter D 1 of the runner (5) is 0.80-0.90, positive The ratio of the length L 7 of the curved airfoil support (10) to the diameter D 1 of the runner (5) is 0.35-0.45, the corresponding installation angle of the blade (11) of the runner (5) is 28°, and the unit speed is 160- 215r/min.
结合图1至图6,在本实用新型的技术方案中,所述的转轮室(4)长度L3与转轮(5)直径D1的比值为0.35~0.40,轮毂(12)直径Dh与转轮(5)直径D1的比值即轮毂比为0.28~0.35,转轮(5)的叶片(11)为不对称扭曲叶片,叶片(11)数量为3片;所述的尾水管(6)进口直径D2为直径的圆柱面所截圆柱面上轮缘侧叶片(11)的叶栅稠密度 2为0.60~0.70,轮毂(12)直径Dh为直径的圆柱面所截圆柱面上轮毂(12)侧叶片(11)的叶栅稠密度 h为1.40~1.50。 1 to 6, in the technical solution of the present utility model, the ratio of the length L 3 of the runner chamber (4) to the diameter D 1 of the runner (5) is 0.35-0.40, and the diameter D of the hub (12) is The ratio of h to the diameter D1 of the runner (5), that is, the hub ratio, is 0.28 to 0.35. The blades (11) of the runner (5) are asymmetrically twisted blades, and the number of blades (11) is 3 pieces; the draft tube (6) The cascade density of the rim side blade (11) on the cylindrical surface cut by the cylindrical surface with the inlet diameter D 2 2 is 0.60~0.70, the hub (12) diameter D h is the diameter of the cylindrical surface sectioned by the cylindrical surface of the hub (12) side blades (11) cascade density h is 1.40 to 1.50.
结合图1至图4,在本实用新型的技术方案中,所述的尾水管(6)长度L4与转轮(5)直径D1的比值为2.30~2.80,尾水管(6)进口直径D2与转轮(5)直径D1的比值为0.95~0.99,尾水管(6)直锥段出口直径D3与转轮(5)直径D1的比值为1.05~1.15,尾水管(6)出口宽度B3与转轮(5)直径D1的比值为1.30~1.35,尾水管(6)出口高度H3与转轮(5)直径D1的比值为1.15~1.30。 1 to 4, in the technical solution of the utility model, the ratio of the length L 4 of the draft tube (6) to the diameter D 1 of the runner (5) is 2.30-2.80, and the diameter of the inlet of the draft tube (6) is The ratio of D 2 to the diameter D 1 of the runner (5) is 0.95-0.99, the ratio of the outlet diameter D 3 of the straight cone section of the draft tube (6) to the diameter D 1 of the runner (5) is 1.05-1.15, and the draft tube (6) ) ratio of the outlet width B 3 to the diameter D 1 of the runner (5) is 1.30-1.35, and the ratio of the outlet height H 3 of the draft tube (6) to the diameter D 1 of the runner (5) is 1.15-1.30.
本实用新型的具体实施例如下: The specific embodiment of the utility model is as follows:
实施例1,按照本实用新型上述的设计方案,以运行水头为0.6m的微水头电站的灯泡贯流式水轮机为例:采用固定支撑为对称型支撑时,灯泡贯流式水轮机的转轮(5)的叶片(11)安放角为26°,转速为45r/min~55r/min,流量为23m3/s ~25 m3/s,水能转换效率达到75%以上;采用固定支撑为非对称型支撑时,灯泡贯流式水轮机的的转轮(5)的叶片(11)安放角为28°,流量为22m3/s ~24m3/s,转速为45 r/min ~55r/min,水能转换效率达到82%以上。 Embodiment 1, according to the above-mentioned design scheme of the utility model, taking the bulb tubular turbine of a micro-head power station with a water head of 0.6m as an example: when the fixed support is a symmetrical support, the runner of the bulb tubular turbine ( 5) The placement angle of the blade (11) is 26°, the rotational speed is 45r/min~55r/min, the flow rate is 23m 3 /s~25 m 3 /s, and the water energy conversion efficiency reaches over 75%; In the case of symmetrical support, the placement angle of the blades (11) of the runner (5) of the bulb tubular turbine is 28°, the flow rate is 22m 3 /s ~ 24m 3 /s, and the speed is 45 r/min ~ 55r/min , The water energy conversion efficiency reaches more than 82%.
实施例2,按照本实用新型上述的设计方案,以运行水头为1. 2m的微水头电站的灯泡贯流式水轮机为例:采用固定支撑为对称型支撑时,灯泡贯流式水轮机的转轮(5)的叶片(11)安放角为26°,转速为60r/min~72r/min,流量为32m3/s~35 m3/s,水能转换效率达到76%以上;采用固定支撑为非对称型支撑时,灯泡贯流式水轮机的的转轮(5)的叶片(11))安放角为28°,转速为60r/min ~75r/min,流量为30m3/s ~32 m3/s,水能转换效率达到83%以上。 Embodiment 2, according to the above-mentioned design scheme of the utility model, take the bulb tubular turbine of the micro-head power station with a running water head of 1.2m as an example: when the fixed support is a symmetrical support, the runner of the bulb tubular turbine (5) The placement angle of the blade (11) is 26°, the rotation speed is 60r/min~72r/min, the flow rate is 32m 3 /s~35 m 3 /s, and the water energy conversion efficiency reaches over 76%; the fixed support is In the case of asymmetric support, the placement angle of the runner (5) and the blade (11) of the bulb tubular turbine is 28°, the rotational speed is 60r/min-75r/min, and the flow rate is 30m 3 /s-32 m 3 /s, the water energy conversion efficiency reaches over 83%.
实施例3,按照本实用新型上述的设计方案,以运行水头为2.5m的微水头电站的灯泡贯流式水轮机为例:采用固定支撑为对称型支撑时,灯泡贯流式水轮机的转轮(5)的叶片(11)安放角为26°,转速为85r/min~100r/min,流量为43m3/s ~46 m3/s,水能转换效率达到76%以上;采用固定支撑为非对称型支撑时,灯泡贯流式水轮机的的转轮(5)的叶片(11)安放角为28°,转速为85r/min~100r/min,流量为42m3/s~44 m3/s,水能转换效率达到83%以上。 Embodiment 3, according to the above-mentioned design scheme of the utility model, taking the bulb tubular turbine of a micro-head power station with a water head of 2.5m as an example: when the fixed support is a symmetrical support, the runner of the bulb tubular turbine ( 5) The placement angle of the blade (11) is 26°, the rotational speed is 85r/min~100r/min, the flow rate is 43m 3 /s~46 m 3 /s, and the water energy conversion efficiency reaches over 76%; For symmetrical support, the placement angle of the blades (11) of the bulb tubular turbine (5) is 28°, the rotational speed is 85r/min-100r/min, and the flow rate is 42m 3 /s-44 m 3 /s , The water energy conversion efficiency reaches over 83%.
本实用新型经反复试验验证,取得了满意的应用效果。 The utility model has been verified through repeated tests and has achieved satisfactory application effects.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103216375A (en) * | 2013-04-10 | 2013-07-24 | 河海大学 | Bulb tubular water turbine for micro water head power station |
CN103807084A (en) * | 2014-01-24 | 2014-05-21 | 中国船舶重工集团公司第七○二研究所 | Eddy elimination device in hydraulic turbine runner body |
CN103912435A (en) * | 2014-03-27 | 2014-07-09 | 河海大学 | Runner of small-hydropower axial flow turbine |
CN109505722A (en) * | 2017-10-24 | 2019-03-22 | 许昌义 | Membrane structure bucket type hydroelectric generation |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103216375A (en) * | 2013-04-10 | 2013-07-24 | 河海大学 | Bulb tubular water turbine for micro water head power station |
CN103216375B (en) * | 2013-04-10 | 2015-09-02 | 河海大学 | A kind of bulb through-flow turbine for micro-water head power station |
CN103807084A (en) * | 2014-01-24 | 2014-05-21 | 中国船舶重工集团公司第七○二研究所 | Eddy elimination device in hydraulic turbine runner body |
CN103912435A (en) * | 2014-03-27 | 2014-07-09 | 河海大学 | Runner of small-hydropower axial flow turbine |
CN103912435B (en) * | 2014-03-27 | 2016-07-06 | 河海大学 | A kind of small power station kaplan turbine runner |
CN109505722A (en) * | 2017-10-24 | 2019-03-22 | 许昌义 | Membrane structure bucket type hydroelectric generation |
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