CN2164467Y - Numerical controlled low-grade hydraulic generator - Google Patents

Abstract

The utility model relates to a numerical controlled low-grade hydraulic generator, comprising an impeller composed of flat blades welded on the outer shell of the rotor of an annular full-speed rare-earth synchronous motor. The rotor of the motor is composed of soft steel with having favorable magnetoconductivity as a base body lined on the inner wall of the outer shell made of steel pipes and magnetic poles made of permanent magnetic rare-earth materials and inlaid in the circumference of the base body. The middle part of the rotor is provided with a stator having the same structure with the rotor of an ordinary wire winding motor, power cords can be directly led out of the supporting shaft end of the stator to feed in an electric network via an electronic switch, an autotransformer and an inverse power supply. The hydraulic generator of the utility model has simple structure and high energy conversion efficiency.

Description

Numerical controlled low-grade hydraulic generator

The utility model relates to a kind of utilized device of renewable energy sources, exactly, relates to a kind of numerical control power generating equipment of utilizing low-grade water to generate electricity.

Before the industrial revolution for the first time, the mankind utilize the renewable sources of energy of nature to obtain power always, but after the industrial revolution, turn to and utilize fuel (primary energy) to obtain power, are just also keeping in the application of waterpower resourses and are obtaining the renewable sources of energy.But also the waterpower resourses that often are only limited to high head are applied.Closely during the last ten years, energy consumption is violent day by day, and energy resources day is becoming tight, and also serious day by day because of the environmental pollution that the use of primary energy causes, people have to revert to deep development and the application to low-grade energy.As renewable sources of energy Application and Development such as solar energy, wind-force, underground heat, morning and evening tides have all been obtained considerable achievement, having entered of having is industrial and civilian.But, in nature more the renewable sources of energy of horn of plenty be low-grade waterpower resourses, although ancient times the working people for a long time using this energy, as waterwheel, water wheels etc., after just power industry had been invented steam engine, internal-combustion engine, motor afterwards, just to these waterpower resourses gradually indifference get off.Because its efficient is low after all, power is little.Raising along with the contemporary science and technology level, scientific and technical personnel develop the renewable sources of energy, the urgency and the success rate that it are applied to the human lives as a kind of reliably additional energy have also had leap to improve, like this, and also for adopting high technology to utilize low-grade waterpower resourses to provide the foundation.

The purpose of this utility model provides a kind of rare earth full speed synchronous machine that utilizes as the low-grade hydroelectric generator of the numerical control of generator.

Realization key of the present utility model is to adopt rare earth permanent-magnetic material to make the numerical control full speed rare-earth synchronous motor of rotor magnetic pole, can convert it the core component of electric energy to as water, thereby makes the application of low-grade water energy become reality with practical value.

Because the utility model is to be used for low-grade waterpower resourses, as river waterflow, morning and evening tides, surfing etc., its grade is very low, have only very low kinetic head of speed and highly limited head to be used, therefore, hydraulic part must be efficient, energy conversion device then should be in the various possible ranges of hydraulic parameters can both proper functioning, and have gratifying conversion efficiency.Generator provided by the utility model be the claimant in addition two authorized Chinese patent (" numerical control full speed rare-earth synchronous motor " patent No.: CN91203427.0 and " rare-earth synchronous motor with ring rotor " patent No.: CN91217200.2) improvement on the basis and recreation, the needs that low-grade water can utilize both can have been adapted to, it is simple to have hydro powered mechanism and electric machine structure again, cost is low, premium properties such as mechanical efficiency and energy conversion efficiency height are a kind of more satisfactory renewable source of energy generation equipment.

Below in conjunction with accompanying drawing, specifically introduce the utility model:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a cross section structure schematic representation of the present utility model.

Fig. 3 is the schematic representation of access electrical network of the present utility model.

Referring to Fig. 1, Fig. 2, the utility model includes impeller, generator and control gear, its rotor 1 is the matrix of making at the good mild steel of the useful magnetic property of lining papers on the outer casing inner wall that steel pipe is made 2 and the magnetic pole made from rare earth permanent-magnetic material 3 inlayed on the circumference around matrix 2 and constitute, magnetic pole 3 can be made with neodymium iron boron or the better rare earth material of performance, can be 6～12 utmost points, look the waterpower resourses of real work scope and select in above-mentioned scope.The centre of rotor is the cylindric stator 4 identical with the rotor structure of conventional wound motor, stator 4 is that the winding 6 of the stator core body that forms by coinciding with silicon steel sheet 5 and its outer rim setting-in constitutes, and be packed on the framework 10 of motor by the back shaft 7 at its two ends, the impeller 9 that a plurality of plate shaped blades 8 constitute is housed on the outer rim of ring-shaped rotor shell, because the kinetic head and the potential head of waterpower are not high, do not need the blade of the special shape complex-shaped, that cost is high.The utility model adopts plate shaped blade (directly being welded on the rotor case after promptly cutting out with steel plate) also can obtain gratifying waterpower effect.Because this generator wants long period of soaking to work in river and even seawater, the preservative treatment that all exposed parts all will be done to strengthen, and the material and the corresponding measure of taking to have good sealing diving performance in seal ring between stator and rotor 11 and the door 12.Because stator maintains static, its out-put supply line 14 directly can be drawn by terminal box 13 from stator axis 7 ends, draw electric current with slip ring and carbon brush and needn't resemble the common coiling electric motor, these the most easy to wear and places that break down are cancelled and make designs simplification, reliable performance.The power line 14 of drawing is via electronic switch 15, insert electrical networks 19 from even pressure governor 16, inverter 17 and uninterruptable power source 18, and carries out digital control by its interface to electronic switch 15, inverter 17 and uninterruptable power source 18 by microcomputer 20.

The utlity model has rare earth many premium properties of synchronous machine at full speed, it can be under any one state from low speed to the hypervelocity range balanced rotation, and start the level and smooth impact of not having, this point especially is fit to low-grade waterpower resourses and uses, as be used in low-grade morning and evening tides power supply, not only when rising tide or ebb tide, no matter also tide breaks with tremendous force or is more smooth, generating when the positive and negative both direction of motor is rotated, be exactly when sea beat, even rotor is rotatablely moved as orientation, and can only make it reciprocally swinging, also can generate electricity as usual.Because the rotating speed of the utility model rotor can produce corresponding the variation with the kinetic head and the potential head size of waterpower, the output voltage of motor again basically with the proportional linear relationship of the rotating speed of rotor, like this, its output voltage also will change thereupon, in order to obtain balanced voltage output, the feed of motor is delivered to behind electronic switch 15 from even pressure governor 16 in the utility model, its voltage is raised to 220 volts or 380 volts, again via pulsewidth modulation (PWM) the type inverter 17 of microcomputer 20 control and uninterruptable power source 18 supply loads, also can directly enter electrical network via behind the inverter 17.The electronic switch here, all be the market universal product from even pressure governor, inverter and uninterruptable power source, the occasion that can use according to generator, purposes etc. select corresponding product supporting with it.

Because the energy grade that the utility model obtained is too low, amplitude of variation is also big in addition, in order to obtain stable power output, can adopt the situation of a plurality of motor parallels power supply to adjust its output parameter in real time, storage, conversion and the output of its operating mode and electric energy are regulated and realized optimization control.

The utility model is simple in structure, maintenance requirement is low, as long as flowing water has very little potential difference, or has the place of morning and evening tides, stormy waves all can use it, can power on the spot, does not consume primary energy, does not have environmental pollution.Shortcoming is that the output power of device is limit by waterpower, regulation range is limited, so, generally the energy uses as a supplement, promptly in the rural area, the river bank in mountain area, original place of using waterwheel, water mill, or coastal seabeach etc. can not obtain the user of power source from urban distribution network, can take this invention as household electricity or low power production power source.

Claims (2)

1, the low-grade hydroelectric generator of a kind of numerical control, include impeller, generator and control gear, it is characterized in that: the rotor of this generator is the matrix that the good mild steel of the useful magnetic property of lining papers is made on the outer casing inner wall that steel pipe is made, being inlaid with the magnetic pole made from rare earth permanent-magnetic material on the circumference around matrix constitutes, the centre of rotor is the cylindric stator identical with the rotor structure of conventional wound motor, the impeller that a plurality of plate shaped blades constitute is housed on the outer rim of rotor case, stator is packed on the framework by the back shaft at its two ends, and the power transmission line of directly drawing from the stator axle head is via electronic switch, from even pressure governor and numerical control inversion device, uninterruptable power source inserts electrical network.

Adopt seal ring and door to combine between 2, the low-grade hydroelectric generator of numerical control as claimed in claim 1, the stator that it is characterized in that this generator and rotor with good diving sealability.

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