CN-116046400-B - Rotating disc cavity test platform

Abstract

The invention discloses a rotating disk cavity test platform which comprises a main air inlet system, a cold air inlet system, an exhaust system, a power transmission system, a lubrication system and a cooling water system, wherein the main air inlet system is connected with a test piece and provides main air flow with flow, temperature and pressure required by a test for the test piece, the cold air inlet system is connected with the test piece and provides secondary air flow with flow, temperature and pressure required by the test for the test piece, the exhaust system is used for exhausting the test piece, the main air inlet system and the cold air inlet system are respectively connected with the exhaust system, the power transmission system is used for driving the test piece to rotate, the lubrication system is used for lubricating the test piece and the power transmission system, and the cooling water system is connected with the lubrication system and is used for lubricating oil heat dissipation of the lubrication system. The test platform introduces the modeled main flow and the modeled secondary flow to develop a rotating disc cavity flow heat exchange test under the high-speed rotation condition, and the influence of the parameter changes such as different rotation speeds of the engine, the flow rate of the secondary flow, the temperature/the pressure and the like on the flow and the heat exchange of the disc cavity is researched.

Inventors

• LIAO LIHUA

Assignees

• 湖南汉能科技有限公司

Dates

Publication Date

20260505

Application Date

20221230

Claims (7)

1. 1. The rotary disk cavity test platform is characterized by comprising a main air inlet system, a cold air inlet system, an exhaust system, a power transmission system, a lubricating system, a cooling water system and a data acquisition system, wherein the main air inlet system is connected with a test piece and provides main air flow with flow, temperature and pressure required by a test for the test piece; the power transmission system is used for driving the test piece to rotate, the lubrication system is used for lubricating the test piece and the power transmission system, the cooling water system is connected with the lubrication system and used for lubricating oil of the lubrication system to dissipate heat, and the data acquisition system is used for measuring, acquiring and processing performance parameters of the test piece and operation data of the test platform; The main air inlet system comprises a main air inlet valve, an air inlet filter, an expansion joint, a flowmeter and a warmer which are sequentially connected through pipe sections, wherein a main air discharging branch communicated with an exhaust system is arranged on the pipe section between the main air inlet valve and the air inlet filter, a main air branch communicated with the air conditioning inlet system is arranged on the pipe section between the air inlet filter and the expansion joint, and an air flow output pipeline connected with a test piece is arranged on the warmer; the cold air inlet system comprises a cold air inlet valve, a cold air filter, a blender, a cold air main path expansion joint and a cold air distributor which are sequentially connected through pipe sections, wherein the cold air distributor is connected with a plurality of cold air distribution branches, each cold air distribution branch is sequentially provided with a flowmeter and a cold air warmer, and each cold air warmer is provided with a cold air output pipeline connected with a test piece; the blender comprises a blending barrel and a main gas release pipeline arranged in the blending barrel, wherein the main gas release pipeline comprises an annular pipe section and an air inlet pipe section which are mutually communicated, the air inlet pipe section penetrates through the wall of the blending barrel, the air inlet pipe section is communicated with a main gas branch in a main gas inlet system, and a plurality of through holes are densely distributed on the pipe wall of the annular pipe section for main gas release.
2. 2. The rotary disk cavity test platform according to claim 1, wherein the exhaust system comprises an exhaust main pipe and two exhaust branch pipes arranged on the exhaust main pipe, a cooling section is further arranged on the exhaust main pipe in the air flow direction in the exhaust branch pipes, the tail end of the exhaust main pipe is communicated with the exhaust tower, the two exhaust branch pipes are respectively a main air exhaust branch pipe and a cold air exhaust branch pipe, the end part of the main air exhaust branch pipe is communicated with a main air exhaust port of a test piece, a main air exhaust auxiliary regulating branch pipe is arranged on the main air exhaust branch pipe, an exhaust collector is arranged at the end part of the cold air exhaust branch pipe, a plurality of cold air exhaust branch pipes communicated with the cold air exhaust port of the test piece extend from the exhaust collector, and the number of the cold air exhaust branch pipes is equal to that of the cold air distributing branch pipes in the cold air intake system.
3. 3. The rotating disk cavity test platform of claim 2, wherein a flow meter is provided on one half of the plurality of cold air exhaust branches.
4. 4. The rotating disk cavity test platform according to claim 2, wherein the cooling section is a high-pressure water spray cooling section, the cooling section comprises a plurality of atomizing nozzles arranged along the circumferential direction of the exhaust main pipe and an outer ring for supplying water to the atomizing nozzles, the outer ring is provided with a water inlet, and the spraying direction of the atomizing nozzles is opposite to the incoming flow direction of air flow in the exhaust main pipe.
5. 5. The rotating disk cavity test platform of claim 4, wherein the cooling water system comprises a circulating cooling water system and a high pressure spray water system, the circulating cooling water system being in communication with the lubrication system and providing cooling water to the lubrication system, the high pressure spray water system being for providing cooling water to the atomizing nozzle.
6. 6. The rotating disk cavity test platform according to claim 1, wherein the power transmission system comprises a motor, a speed increasing gear box and a torque measuring device which are sequentially arranged, the motor is connected with the speed increasing gear box through a low-speed coupling, the speed increasing gear box is connected with the test piece through a high-speed coupling, and the torque measuring device is used for measuring torque.
7. 7. The rotating disk cavity test platform according to claim 6, wherein the lubrication system comprises a speed increasing gear box lubrication system and a test piece lubrication system which are arranged independently of each other, an emergency power supply is arranged on the lubrication system, and the emergency power supply is required to ensure that the lubrication system can still provide a continuous oil supply function of lubricating oil for not less than five minutes after power failure.

Description

Rotating disc cavity test platform Technical Field The invention relates to the technical field of engine disc cavity flow and heat exchange tests, in particular to a rotating disc cavity test platform. Background Aeroengines are a typical high-speed rotating machine. Turbine discs are an important component of an aircraft engine, and the chamber formed by the turbine discs and their surrounding stator parts is called the rotating disc chamber. The problem of flow heat exchange of the rotating disc cavity is a professional research field in academia. The working performance of the rotating disc cavity directly affects the overall working state of the aeroengine, and when the rotating disc cavity is tested, the real working condition of the whole machine is required to be simulated, but in order to reduce the testing difficulty of the rotating disc cavity of the aeroengine in the traditional testing method, part of relevant testing parameters are scaled or reduced in an equal ratio through a similar method, and only the flowing heat exchange condition of the rotating disc cavity under a certain single factor is tested. For example, patent publication No. CN204944818U discloses a rotary disk cavity flow heat exchange test device, which comprises a stator casing, a turbine disk, a front shaft, a rear shaft and a radiation heating device, wherein the stator casing is used for providing a sealed rotor movement space, a casing hole is formed in the stator casing and is connected with an air source, the front shaft is used as a rotating edge of the sealed stator casing and jointly drives the turbine disk to rotate with the rear shaft, ventilation holes are formed in the front shaft and the rear shaft and are used for circulation of cold air, and meanwhile, the rotary disk cavity flow heat exchange test device is further provided with the radiation heating device on the stator casing and is used for heating the turbine disk. The device can effectively reduce the temperature of the disk center of the turbine disk while the disk edge of the turbine disk obtains higher temperature. The above patent simulates the flow heat exchange condition of the rotating disc cavity from only one factor of temperature, which obviously cannot provide effective reference for exploring the flow heat exchange influence of various parameter changes on the rotating disc cavity under the complex working condition of the aeroengine. Therefore, there is a need to develop a test stand that simulates the engine operating environment in multiple orientations to more fully investigate the flow and heat transfer of the rotating disk cavity. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a rotary disk cavity test platform capable of simulating the working environment of a rotary disk cavity in a multi-dimensional manner. The aim of the invention is achieved by the following technical scheme: The rotary disk cavity test platform comprises a main air inlet system, a cold air inlet system, an exhaust system, a power transmission system, a lubrication system, a cooling water system and a data acquisition system, wherein the main air inlet system is connected with a test piece and provides main air flow with flow, temperature and pressure required by a test for the test piece, the cold air inlet system is connected with the test piece and provides secondary air flow with flow, temperature and pressure required by the test for the test piece, the exhaust system is used for exhausting the test piece, the main air inlet system and the cold air inlet system are respectively connected with the exhaust system, the power transmission system is used for driving the test piece to rotate, the lubrication system is used for lubricating the test piece and the power transmission system, the cooling water system is connected with the lubrication system and is used for lubricating oil heat dissipation of the lubrication system, and the data acquisition system is used for measuring, acquiring and processing performance parameters of the test piece and operation data of the test platform. The main air inlet system comprises a main air inlet valve, an air inlet filter, an expansion joint, a flowmeter and a heater which are sequentially connected through pipe sections, a main air discharging branch communicated with an exhaust system is arranged on the pipe section between the main air inlet valve and the air inlet filter, a main air branch communicated with the cold air inlet system is arranged on the pipe section between the air inlet filter and the expansion joint, and an air flow output pipeline connected with a test piece is arranged on the heater. Further, the cold air inlet system comprises a cold air inlet valve, a cold air filter, a blender, a cold air main path expansion joint and a cold air distributor which are sequentially connected through pipe sections, the cold air distributor is connected with a plurality