Manufacturing method of cage bar support between turbine stages

1. The present invention belongs to the technical field of aeroengines, in particular to a turbine inter-stage support with cage bars.

Background technique:

2. The axial position of the existing gas turbine engine's turbine stage support is generally located between the two turbine stages, and it mainly includes a bearing outer ring, a bearing support plate or blade, and a bearing inner ring. The bearing outer ring has a mounting edge, which is connected with the engine outer casing or installation joint; the middle part is the bearing support plate or blade, which is a component of the gas flow channel and used to transmit the mechanical load of the rotor; the inner ring is the bearing sleeve The barrel and the mounting edge are connected with the bearing seat, elastic support and bearing. The load of the engine rotor is usually transmitted to the engine casing or mounting section via bearings, elastic supports, bearing seats, and turbine interstage supports. Among them, the support between the turbine stages is generally rigid. In order to meet the robustness requirements of the engine's high-speed rotor support system, an elastic support structure is usually set on the bearing seat to reduce the critical speed of the rotor and reduce the rotor vibration.

3. The support between turbine stages is a part of the engine load-bearing system and is generally used to support the low-pressure rotor or the power rotor. The load-bearing inner ring of the inter-stage support is connected with the bearing seat and the bearing, and the load of the rotor is transmitted to the load-bearing support plate or blade through it, and then to the mounting edge of the load-bearing outer ring. The entire turbine inter-stage support generally has good strength and rigidity requirements, and is located around high-temperature fuel gas, and needs to have the ability to withstand high temperature and heat stress.

4. Due to the need of the rotor system to reduce the critical speed and reduce vibration, the bearing and the bearing need to be elastically supported, and then connected to the bearing seat and the turbine inter-stage support. The entire bearing seat assembly includes complicated structures such as oil supply and return, air cooling and sealing, and elastic support, making the design difficult and the structure complicated.

5. Therefore, the present invention provides a turbine inter-stage support with cage bars to solve the above-mentioned background art problems.

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