JPS60249673A - Hydraulic turbine - Google Patents

Abstract

PURPOSE:To utilize a low head so effectively and thereby make a large output securable, by installing each conical guide plate guiding a stream of water outward inside a cylindrical casing in a multistage manner as well as installing each screw runner vane projectingly from a rotary shaft at intervals of each of these conical guide plates. CONSTITUTION:A cylindrical casing 1 is set up in a vertical type, and a lot of bearing plates 4, boring a hole through the center of a disc 2 and installing a bearing at the lower surface, are set up in the center of the inside of the casing, and supported by radial arm rods 5. In addition, each of conical guide plates 6, guiding a stream of water outward each perihperal edge of these bearing plates 4, is hung down, while each conical guide plate 6' is installed in an intermediate position between each bearing plate 4 and an inner circumferential surface of the cylindrical casing 1 likewise. And, a main shaft 7 is inserted through into these bearing plates 4 and supported on bearings 8 and 8' installed in top and bottom of the cylindrical casing 1, while several screw runner vanes 9 are projectingly installed from the main shaft 7 at intervals of each bearing plate 4, thus a hydraulic turbine 10 is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a water turbine that converts the energy of water into mechanical power.

Conventional technology Currently, there are Pelton turbines, Francis turbines, propeller turbines, etc. as water turbines used in hydroelectric generators, etc. Pelton turbines are used for high head applications, Francis turbines are used for medium head applications, and Francis turbines are used for low head applications. A propeller water wheel is used. However, propeller water turbines for low head use have several blades protruding from the main shaft in one stage, and the water flow generates rotational force on the blades to extract power, and it is not possible to extract enough energy from the water. However, there were drawbacks such as low efficiency.

Problems to be Solved by the Invention In order to solve the above-mentioned disadvantages, the present invention provides a multi-stage conical guide plate for guiding water flow outward in a cylindrical casing, and the conical guide plates are arranged at intervals between the conical guide plates and the rotating shaft. It is a water wheel with protruding screw blades, and is characterized by its low head and high output.

A foolproof way to solve problems Hereinafter, the present invention will be explained in detail with reference to embodiment figures.

A cylindrical casing 1 with an appropriate diameter and height is arranged vertically, a hole is made in the center of a disc 2 with an appropriate diameter, and a bearing plate 4 with a bearing 3 provided on the lower surface is placed vertically at the center of the cylindrical casing 1. A large number of guide plates are arranged at intervals and supported by radial arm rods 5 on the inner surface of the casing, and a conical guide plate 6 for guiding water flow outward is suspended from the periphery of each bearing disk 4, and each bearing disk 4 and the inner surface of the casing are Similarly, a conical guide plate 6' is installed at the intermediate position of the cylindrical casing 1 by inserting the main shaft 7 into each bearing plate 4.
The water turbine 10 is rotatably supported by bearings 8 and 8' provided above and below the water wheel 10, and has several screw blades 9 protruding from the main shaft 7 at intervals between the respective bearing discs 4. In addition, numeral 11 in the figure indicates a water flow duct.

action, effect Next, the effects of the present invention will be explained with reference to embodiment figures.

The water turbine 10 according to the present invention is installed, for example, at a weir provided across a river, and has a water flow duct 11 at the upper end of a cylindrical casing 1.
The water that is stored in the cylindrical casing 1 is passed through the cylindrical casing 1, and each screw blade 9 is rotated by the water flow flowing down inside the cylindrical casing 1, and power is taken from the upper end of the main shaft 7, which works in conjunction with a generator, etc. It is something that makes you

The main shaft 7 is provided with screw blades 9 in multiple stages, and a conical guide plate 6゜6' is provided at the bearing plate 4 and an intermediate position inside the casing for guiding the water flow from the center toward the inner surface of the casing. is directed outward from the center, and by constantly generating torque as a rotational force at the tip of the screw blade 9, it is possible to obtain a high output even at a low head, and it is possible to obtain a high output even at a low head. It has the remarkable effects mentioned above, such as being able to contribute as a water turbine for power generation.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a water turbine according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line ■-■, Fig. 3 is a cross-sectional view taken along the line <III-m, and Fig. 4 is a cross-sectional view taken along the line <EV->. It is a sectional view taken along the line IV.

Claims (1)

[Claims] l A bearing plate is installed using arm rods at the center of a cylindrical casing with an appropriate diameter and height at an appropriate distance above and below, and a water flow is induced toward the inner circumferential surface of the casing near the periphery of the bearing plate and the center of the voice. A water turbine characterized by having a conical guide plate hanging down, a main shaft inserted into each bearing plate to support the shaft, and several screw blades protruding from each bearing plate.