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Turbine rotor of micro gas turbine and casting method thereof

A technology of micro gas turbine and turbine rotor, which is applied to casting molding equipment, casting molds, cores, etc., can solve problems such as inability to work stably, and achieve the effects of eliminating under-casting, reliable work, good casting process performance and forming performance.

Active Publication Date: 2017-12-12
XIAN TONGLING POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the turbine rotor of a micro gas turbine cannot work stably in the prior art, the technical solution of the present invention is as follows:

Method used

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  • Turbine rotor of micro gas turbine and casting method thereof
  • Turbine rotor of micro gas turbine and casting method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The maximum working speed of the turbine rotor of the micro gas turbine is 90,000 RPM, the working temperature is as high as 1000°C, and the blade bears a maximum stress of about 900MPA. In order to ensure the stable operation of the turbine rotor, the present invention uses high-strength nickel-based cast superalloy K4002 as the material of the turbine rotor. The chemical composition (by mass percentage) of K4002 is as shown in table 1:

[0033] Table 1

[0034] C

Cr

Ni

co

W

Mo

AL

0.13～0.17

8.0～10.0

Remain

9.0～11.0

9.0～11.0

≦0.5

5.25～5.75

Ti

Fe

Ta

f

V

B

Zr

1.25～1.75

≦0.5

2.25～2.75

1.3～1.7

≦0.10

0.01～0.02

0.03～0.08

mn

Si

S

P

Cu

Mg

Ag

≦0.20

≦0.20

≦0.010

≦0.10

≦0.10

≦0.003

≦0.0005

Pb

Bi

≦0.0005

≦0.00005

[0035] It can be seen from Table 1 that there ...

Embodiment 2

[0058] Step 1. Design a spherical casting system according to the structure and parameters of the turbine rotor to be cast;

[0059] Step 2, manufacture turbine rotor wax film 2, spherical wax film 4 and runner wax film 3, wherein the blade tip of the turbine blade 1 of turbine rotor wax film 2 offers runner 5; Its structure is as follows figure 1 shown.

[0060] The shape and structural parameters of the turbine blade 1 of the wax film of the turbine rotor and the parameters of the spherical wax film 4 and the runner wax film 3 are all set by the spherical casting system in step 1. After setting, use the wax film machine to make the turbine rotor wax film 2, spherical wax film 4 and flow channel wax film 3 at 55°C and 4 bar pressure. In order to prevent under-casting during the casting process, a flow channel 5 is opened at the tip of the turbine blade 1 of the wax film 2 of the turbine rotor.

[0061] Step 3, combine the turbine rotor wax film 2, the spherical wax film 4 a...

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Abstract

The invention discloses a turbine rotor of a micro gas turbine. The turbine rotor is made of a K4002 high-temperature alloy. The invention further discloses a method for casting the turbine rotor of the micro gas turbine by utilizing the K4002 high-temperature alloy. According to the turbine rotor of the micro gas turbine, the K4002 high-temperature alloy is adopted as the material of the turbine rotor, under the conditions that the inlet temperature of the turbine is 1200K and the rotating speed of the rotor of a core engine is 45000 rpm, long-time operation of the micro gas turbine can be ensured, and the work is reliable; according to the method for casting the turbine rotor of the micro gas turbine, filling of blades can be guaranteed, and the problem of misrun is solved; and a ball type casting system is adopted, so that looseness is prevented, and cracks are prevented from being generated.

Description

technical field [0001] The invention relates to the technical field of micro gas turbines, in particular to a turbine rotor of a micro gas turbine and a casting method of the rotor. Background technique [0002] The micro gas turbine is a kind of micro heat engine, the power is between 30KW-500KW, and the structure adopts centrifugal compressor and centripetal turbine. The micro gas turbine is mainly used as the power source of the generating set. It has many advantages such as simple structure, suitable for a variety of fuels, high thermal efficiency, and low pollution. For many other fields. [0003] The gas turbine is an internal combustion power machine that uses continuous flowing gas as the working medium to drive the impeller to rotate at high speed, and converts the energy of the fuel into useful work. It is a rotary impeller heat engine. The turbine rotor is the core component of the gas turbine. Its maximum operating speed is 90,000RPM, and the working temperatur...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C9/22C22C19/05B22C3/00
CPCB22C3/00B22C9/04B22C9/22C22C19/057
Inventor 刘广勤阎成祥刘力铭
Owner XIAN TONGLING POWER
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