RU81773U1 - MICROHES WITH A HIGHLY USED GENERATOR - Google Patents

Abstract

Utility model “Micro-hydroelectric power station with a highly used generator relates to the field of energy, namely to non-traditional renewable energy sources and can be used to electrify the work and life of people living in areas that do not have constant power supply: small villages, shepherds of livestock breeding, border posts, foresters, recreation centers, geological parties, etc. The task of a utility model in the development and creation of a more lightweight, simplified, safe and reliable design option MKGES with improved conditions for cooling the generator. The proposed utility model has several advantages: - Reduction of 30-50% by weight and cost compared to peers; - Convenience of assembly and disassembly for prevention, repair and transportation. - Increased safety, reliability and ease of operation and the field of efficient use of power up to 100 kW.

Description

The utility model “Micro hydroelectric power station with a highly used generator” refers to the field of energy, namely to non-traditional renewable energy sources. It can be used to electrify the work and life of people living in areas that do not have a constant power supply (small settlements in mountainous areas, subsidiary farms, shepherds for livestock raising, border outposts, geological parties, pumping stations for supplying water to settlements and collective gardens , forestry, cathodic protection stations (gas pipelines, oil pipelines), gas station and battery charging, space stations, etc.).

One of the analogues is MKGES Kharkov Turbine Plant named after Kirov (1, 2). In it, the propeller-type impeller is built into the hollow-rotor generator. Direct-flow unit. In the water supply and outlet pipe of the hollow rotor body, the vanes of the guide apparatus and special bearings with fairings are fixed, in which rational-thrust bearings of the impeller shaft are located. A squirrel-cage induction motor is used as a generator. The active components of the generator rotor are mounted on the blades of the turbine impeller. A capacitor bank is used for it as a source of reactive power. An additional controlled ballast load was used to control power, frequency and voltage.

The disadvantages of this MHPP are: design complexity, characterized by the location of the impeller inside the rotor shaft of the generator and the associated struggle with moisture from entering the electrical part (stator and rotor windings); the need to increase the diameter of the generator shaft to accommodate the impeller and ensure through it

the required water flow rate and, accordingly, the capacity of MkHPP; deterioration of the stator cooling conditions due to the forced exclusion of the fan, which necessitates a reduction in the current in its winding or, accordingly, an increase in the cross section, and hence the size, weight and cost of the unit; an increase in centrifugal forces with an increase in the diameter and mass of the rotor when fastening active electrical units on the impeller blades. This requires an increase in their strength, especially with a propeller impeller, which is characterized by a significant rotational speed during emergency load drops (drops) (4).

The closest in technical essence and the achieved results is MKGES, created in accordance with patent No. 1780551 A3 F03B 13/00. (3) The essence of the design is that a thick-walled case (bed) is removed from the core of the stator steel and instead of it tightly, eliminating the air gap, a “shirt” is made of material with increased thermal conductivity (for example, duralumin or stainless steel). The fan is removed from the rotor. Open (for air inlet and outlet) front and rear bearing caps are replaced by closed ones. The place of their connection with the “jacket”, the output of electrical wires from the “jacket”, the output of the generator rotor shaft to the turbine impeller are made with special seals. The resulting capsule with a generator is mounted in a suction pipe of a hydraulic turbine on struts.

The disadvantage of this MHPP is the difficulty of operation associated with the use of complex seals to isolate the capsule with the electric generator from moisture, as well as the complexity of disassembling and assembling it for inspection and repair. In addition, the effective use of this design is limited to up to 50 kW.

The objective of the proposed utility model is to increase reliability, safety, simplify operation, and expand the zone of efficient use of power.

The technical result is an increase in the efficiency of the MHPP by improving the cooling conditions of the generator, increasing safety, reliability, ease of assembly and dismantling during transportation, increasing the relative value of power.

The technical result is achieved by the fact that a highly used generator is carried out of the water stream (suction pipe) of the turbine to the outside and connected to the shaft of the turbine output through the elbow of the suction pipe.

The proposed MHPP includes a hydraulic turbine with an electric current generator brought out through the elbow of the suction pipe and connected to the turbine shaft and is characterized in that the generator stator bed is made in the form of a jacket, which is tightly fitted on the stator package, to the ends of which are flanged bearing caps, and around jacket created a casing for the formation of a cooling chamber, which is equipped with pipes supplying and discharging cooling water, while the generator is made with a smaller diameter, and an elongated package of one ora and a rotor core on an outer surface of the jacket formed corrugation groove depth 0.5-1.5 mm and 3-5 mm in width, and the stator package surface is lubricated with a dielectric potting composite.

A general view of the MKHPP with a highly used generator is shown in Fig. 1, where: 1 - pressure pipe, 2 - stator columns of the turbine, 3 - impeller, 4 - shaft, 5 - coupling, 6 - stator housing, 7 - cooling chamber, 8 - a layer of a heat-conducting composite, 9 - a cowling, 10 - a suction pipe, 11, 12 - inlet and outlet cooling water pipes, 13 - electric power output cable.

MKGES works as follows. Water from the discharge conduit 1 enters the impeller of the turbine 3 and rotates the rotor of the generator connected to the shaft 4 through the coupling 5. The turbine shaft is brought out from the suction pipe 10. A chamber is made on the stator of the generator

cooling with a tightly worn jacket 6 and a casing 7 around it with a slit. Water is supplied to the cooling chamber by supply and exhaust pipes 11 and 12. A layer of heat-conducting dielectric composite 8 is applied to the surface of the stator core. Electricity is supplied to the consumer from the control and distribution panel.

The proposed utility model has several advantages:

- A decrease of 30-50% by weight and cost compared to peers;

- Convenience of assembly and disassembly for prevention, repair and transportation.

- Increased safety, reliability and ease of operation and the field of efficient use of power up to 100 kW.

Bibliographic data

1. Microhydroelectric power plants (advertising brochure of the Kharkov Turbine Plant).

2. Microhydroelectric power plants (advertisement), NPO Turboatom, Ukraine, 310323, Kharkov - 323.

3. RF patent 1780551 A3, F03В 13/00 Tamadaev A.M. and etc.

4. Schapov N.M. Turbine equipment of hydroelectric power stations. SEI, Ml, 1961.

Claims (1)

Micro hydroelectric power station, including a hydraulic turbine with an electric current generator brought out through the elbow of the suction pipe and connected to the turbine shaft, characterized in that the generator stator bed is made in the form of a jacket, which is tightly mounted on the stator package, to the ends of which are flanged bearing caps, and around jacket created a casing for the formation of a cooling chamber, which is equipped with pipes supplying and discharging cooling water, while the generator is made with a smaller diameter, and an elongated stator package and erdechnikom rotor, on the outer surface of the jacket formed corrugation groove depth 0.5-1.5 mm and 3-5 mm in width, and the stator package surface is lubricated with a dielectric potting composite.