Unlock instant, AI-driven research and patent intelligence for your innovation.

Gas turbine

A gas turbine and air technology, applied in mechanical equipment, engine functions, engine components, etc., can solve problems such as changes in thermal conductivity and halving the effect of heat shielding

Inactive Publication Date: 2003-12-24
MITSUBISHI HITACHIPOWER SYST LTD
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the technique described above has only a small gap between the outer surface of the blade retaining part and the heat shield
Therefore, there is a problem that air having a temperature different from that of the steam flowing through the cooling passage of the blade holding ring generated by the forced convection (especially generated by dynamic pressure) of the high-speed and high-pressure cooling air for the vane easily enters the gap.
When the air with a fast flow velocity enters the gap, the thermal conductivity of the outer surface of the blade ring holding member etc. changes, and the effect of heat shielding is halved.

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
  • Gas turbine
  • Gas turbine
  • Gas turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 A cross-sectional view showing the inside of a gas turbine according to an embodiment of the present invention. Inside the gas turbine cylinder 1, stator blades 2, 3, 4 and rotor blades 5, 6, 7 are arranged in parallel in several stages. Cylindrical blade holding rings 8, 9, 10 are fitted in the cylinder 1. While supporting the stationary blades 2, 3, 4, the blade holding rings 8, 9, 10 have a facing blade 5, 6, Parts 11, 12, 13 of 7. These blade holding rings 8, 9, 10 are engaged and assembled in the axial direction.

[0029] The inside of the first-stage blade holder ring 8 and the second-stage blade holder ring 9 are provided with blade holder ring cooling passages 14, 15 for controlling the temperature of the steam flow, and these blade holder ring cooling passages 14, 15 are provided in the axial direction. The communication pipe 16 communicates. Generally, a plurality of communication pipes 16 are provided in the peripheral direction of the blade hol...

Deformed example 1

[0038] image 3 It is an external view showing a modified example of the partition wall provided on the outer surface of the blade holding ring and the communication pipe, (a) is a side view, (b) is a front view, and (c) is a view of the communication pipe in (a). Zoom in on the graph. In this figure, with figure 2 The same indicates the state where the heat shield is removed. In Modification 1, the partition wall 21 protrudes in the respective radial directions of the blade holding rings 8 and 9 and the communication pipe 16 attached to the partition wall 21 . This point is the same as the above-mentioned embodiment.

[0039] In Modification 1, the partition wall 21 is arranged intermittently in the peripheral direction of the blade holder rings 8 , 9 and the communication pipe 16 . In addition, the number of partition walls 21 is not limited to the number shown in this figure. An appropriate amount can be selected according to the dynamic pressure of the cooling air of...

Deformed example 2

[0044] 4 is an appearance view showing a modified example of a partition provided on the outer surface of the blade holding ring and the communication pipe, in which (a) is a side view, (b) is a front view, and (c) is a part of (a). Enlarged view of connecting tube. This graph is related to figure 2 and image 3 It also shows the state where the heat shield is removed. In Modification 2, the partition wall 22 is a convex structure protruding in the radial direction of the outer surfaces of the blade ring holding members 8 and 9 or the outer surface of the communication pipe 16 . This point is the same as the first embodiment or the modified example.

[0045] A plurality of partition walls 22 are arranged in different directions to block the air between the outer surfaces of the blade holding rings 8 and 9 or the outer surface of the communication pipe 16 and the heat shield. On the other hand, in FIG. 4 , partition walls 22 are arranged in both the axial direction and the...

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

No PUM Login to View More

Abstract

Blade ring cooling passages (14, 15) are provided inside a first blade ring (8) and a second blade ring (9). The blade ring cooling passages (14, 15) are connected with each other through a communication pipe (16) that is arranged in an axial direction of the blade ring. From outside of a wheel chamber (1), cooling air (17) to cool down stationary blades is sent with pressure into inside of the stationary blades which are installed inner wall of the blade rings. Thermal shields (18) are provided on outer surfaces of the blade rings (8, 9) and communication pipes (16) through gaps therebetween. In the gaps between the outer surfaces of the blade rings (8, 9) or the outer surfaces of the communication pipes (16) and the thermal shields (18), partitions are installed to stagnate the cooling air (17) to cool down the stationary blades.

Description

technical field [0001] The present invention relates to a gas turbine, and more particularly to a blade retainer material having a blade retainer cooling passage and a gas turbine having improved heat shielding effect provided therearound. Background technique [0002] Figure 5 It is a sectional view showing the inside of the gas turbine. This gas turbine is used to illustrate the present invention for convenience and does not conform to the so-called common technology known to everyone. In this figure, the division into the first blade holder ring 31 and the second blade holder ring 32 corresponds to the first stage rotor blade 33 and the second stage rotor blade 34 respectively. Circumferential blade holder cooling passages 35 , 36 are provided inside the blade holder members 31 , 32 , and the respective passages communicate in the axial direction with a communication pipe 37 . [0003] Vane cooling air 39 is pressurized from the outside of the blade holding rings 31 an...

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
Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/18F01D9/02F01D9/04F01D11/04
CPCF05B2240/11F01D25/14F02C7/18F01D11/24F05D2240/11F01D5/186F05D2260/2322F01D5/18F05B2260/233
Inventor 马越龙太郎
Owner MITSUBISHI HITACHIPOWER SYST LTD