High-temperature axial-flow type tail gas turbine

An exhaust turbine and axial flow technology, which is applied to non-variable-capacity engines, leakage prevention, blade support elements, etc. It can reduce the deformation, reduce the loss of air leakage, and improve the thermal insulation efficiency.

Active Publication Date: 2010-12-08
CHINA PETROCHEMICAL CORP +1
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure is not a whole ring structure, the strength and rigidity are poor, and it can only avoid the leakage of interstage gas
[0004] The patent with the publication number CN2469184 provides a structure of a steam turbine motor blade with its own shroud damping sheet. When running at high speed, the strength margin is too small.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-temperature axial-flow type tail gas turbine
  • High-temperature axial-flow type tail gas turbine
  • High-temperature axial-flow type tail gas turbine

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Such as figure 2 , image 3 with Figure 4 As shown, a high-temperature axial-flow exhaust gas turbine adopts an axial intake and radial upward or downward exhaust structure, including an intake housing 1, a primary guide vane 2, a secondary guide vane 3, Rotor 4, transition housing [20], exhaust casing 5, bearing system 6 and base 7.

[0027] Moving blades are installed on the rotor 4;

[0028] Each leaf of the moving blade includes a leaf crown 14, a leaf body [18] and a leaf root 15. Each leaf crown 14 has a V-shaped structure.

[0029] The bucket includes a primary bucket 12 and a secondary bucket 13.

[0030] The tip shroud of the rotor blade adopts a honeycomb seal with a complete ring structure. Specifically, the outer side of the first-level rotor blade 12 is the first-level rotor honeycomb seal 8, and the outer side of the second-level rotor blade 13 is the second-level rotor. Leaf honeycomb seal 9.

[0031] When the blades of the entire stage of the moving blades ar...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Widthaaaaaaaaaa
Login to view more

Abstract

The invention provides a high-temperature axial-flow type tail gas turbine which belongs to the field of energy recovery. The device adopts a structure form of axial air inlet and radial upward or downward exhaust and comprises an air inlet casing 1, a first stage guide vane 2, a second stage guide vane 3, a rotor 4, a transition casing 20, an exhaust casing 5, a bearing system 6 and a base 7. A moving vane adopts a vane shroud in a V-shaped structure, and a surrounding belt of the top of the moving vane is sealed by a honeycomb in an integral domain structure. The invention is suitable for tail gas with higher inlet pressure and low flowing quantity and the tail gas with solid particles, has higher efficiency, improves the heat insulation efficiency by 4% compared with the existing tail gas turbine products, and improves the sealing reliability of the moving vane and the surrounding belt of the top of the moving vane.

Description

technical field [0001] The invention belongs to the field of energy recovery, and in particular relates to a high-temperature axial flow exhaust gas turbine. Background technique [0002] The medium of the exhaust gas turbine is usually the exhaust gas from oil refining, chemical, and metallurgical installations, which has the characteristics of high temperature, solid particles, and corrosiveness. The exhaust gas turbine converts the pressure energy in the exhaust gas into mechanical work, and drives the compressor or generator to recover energy. At present, there are some tail gas turbine products in China, such as tail gas turbines for high-temperature nitric acid plants and flue gas turbines for oil refinery catalytic cracking units. Structure, axial air intake, radial exhaust; the rotor blade tip has no blade crown, the blade tip and the shroud are provided with a large blade tip gap, and there is no sealing measure. The main reasons for these characteristics are: gen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F01D1/02F01D5/02F01D5/14F01D5/30F01D11/12
Inventor 丁勤冀江
Owner CHINA PETROCHEMICAL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products