Thermal expansion turbine steam turbine

Abstract

The invention provides a thermal expansion turbine steam turbine, and relates to the technical field of steam turbines. The thermal expansion turbine steam turbine comprises a spiral fan compressor, a turbine steam turbine body, a starting assembly and a thermal expansion device; the spiral fan compressor comprises a sealed barrel, a gas gathering barrel is arranged in the sealed barrel, a conical wheel is arranged in the gas gathering barrel, and spiral fans are arranged on the outer side wall of the conical wheel; an air chamber rotating channel is formed among every two adjacent spiral fans, the outer wall of the conical wheel and the inner wall of the gas gathering barrel, and the cross section area of each air chamber rotating channel is gradually reduced from the tip end of the conical wheel to the other end of the conical wheel; and the thermal expansion device communicates with an exhaust port and the turbine steam turbine body; The thermal expansion turbine steam turbine further comprises a rotating shaft, the turbine steam turbine body comprises a turbine cylinder and a turbine rotationally arranged in the turbine cylinder, and the turbine is provided with turbine plates in the axial direction of the turbine; the turbine cylinder is composed of a cylindrical barrel body and sealing cylinder covers arranged on the circular bottom faces on the two sides, and the sealing cylinder covers are provided with bearing sleeve combination devices; the turbine cylinder is formed into an upper half cylinder and a lower half cylinder; and the turbine is a hollow barrel body. The thermal expansion turbine steam turbine is low in energy consumption, high in thermal efficiency and high in single-machine power.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a thermal expansion turbine steam turbine. Background technique [0002] In the existing gas turbine, blade blades are arranged on the impeller shaft in the cylinder, and compressed air impacts the blade blades to generate mechanical energy to do work, which belongs to the windmill principle. However, the windmill principle gas turbine has a large heat loss and low mechanical efficiency, which cannot meet the requirements of modern life concepts. [0003] 1. The principle of the windmill has the following characteristics: in the cylinder, the direction of movement of the compressed air is parallel to the axis of the impeller, the compressed air is a direct airflow in the cylinder, the path of the compressed air in the cylinder is small, and the repeated cycle utilization rate of the compressed air in the cylinder is low , thus reducing the thermal efficiency of the gas tu...

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Problems solved by technology

[0006] 4. The air propulsion of the existing compressor is small and the compression ratio is low, which is the main reason for the low power of the gas turbine:

[0009] (3) Existing compressor impellers are all configured as cylindrical parallel shafts, and the outer wall of the impeller is provided with blades along the axial direction. The peak position of the blades has a large torque, and the propulsion amount of the air is large, and the compression ratio is large.

[0010] 5. The existing gas turbines have insufficient combustion, and their thermal efficiency is low: the existing gas turbines flow the fuel into the combustion chamber together with the compressed air for combustion. Mixing ratio concentration, in order to achieve the combustion conditions, it is necessary to increase the injection amount of fuel, resulting in insufficient combustion and generating a large amount of black smoke, which not only causes air pollution, but also reduces the thermal efficiency of the gas turbine

[0011] 6. In the existing gas turbine, the fuel flows into the combustion chamber together with the compressed air for combustion. The combustion in the combustion chamber space is intense, and the ambient temperature of the combustion chamber increases sharply, causing the blades, impellers, bearings and other components inside the combustion chamber to generate Overheating damage, so higher requirements are placed on the material of the parts, especially the blades must be made of heat-resistant and expensive alloy metals, which increases the manufacturing cost and difficulty; in addition, the blades are streamlined, and the process is complicated. Difficult to manufacture, time-consuming and labor-intensive

[0014] The bearing is overheated. In the existing gas turbine, the fuel flows into the combustion chamber together with the compressed air for combustion. The combustion chamber burns violently and the ambient temperature is high. Therefore, the exposed impeller shaft absorbs a large amount of heat energy, and then transfers a large amount of heat energy to the bearing. The overheating effect of the bearing and lubrication system reduces the lubrication coefficient of the oil, so the bearing is prone to aging and wear

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