System and method for monitoring running state of main shaft of self-powered jet engine

Abstract

The invention discloses a self-powered jet engine main shaft running state monitoring system and method, and relates to the field of engine main shaft rotor monitoring, and the system comprises a thermoelectric conversion module which is attached to the inner wall of an engine main shaft rotor, the thermoelectric conversion module converts heat energy into electric energy in a temperature difference environment caused by cooling airflow in the engine spindle and high-temperature gas on the outer wall; the energy management module collects and stores the electric energy converted by the thermoelectric conversion module and performs energy management so as to effectively control energy supply to the sensing module and the wireless transmission module; the sensing module is attached to the interior of the engine main shaft to sense operation state information of an engine main shaft rotor; and the wireless transmission module is connected with the sensing module, acquires sensing information and wirelessly transmits the sensing information to an upper computer. The whole system is connected with the outside without wires. According to the technical scheme, wireless monitoring of the state of the spindle rotor of the jet engine can be achieved without an additional power supply device, and the problems of energy supply and complex wiring of spindle rotor monitoring are solved.

Description

Technical Field

[0001] The invention relates to the field of jet engine operating status monitoring, and in particular to a self-powered jet engine main shaft operating status monitoring system and method. Background Art

[0002] The main shaft rotor of a jet engine is a key component in a jet engine. When the jet engine is running, the main shaft rotor is in a high temperature and high pressure environment. Overheating and cracks in the main shaft rotor may cause damage to the main shaft rotor, thus affecting the safe operation of the jet engine. Therefore, temperature and stress monitoring of the main shaft rotor of a jet engine is crucial for the safe and stable operation of the engine.

[0003] At present, the sensor systems used for monitoring the state of the main shaft rotor of the engine are mostly deployed on the stator and rarely deployed directly on the rotor because of the difficulty of access to the rotor when it is running and rotating. The sensor system deployed directly on the rotor is crucial for realizing in-situ online real-time monitoring of the rotor state. The existing reported technologies for directly deploying on the rotor to monitor the state of the main shaft rotor of the jet engine mainly rely on battery power or connect to an external power supply through a slip ring to obtain power. The reliance on batteries in these technologies will cause high maintenance costs due to the difficulty of replacing batteries, and the method of connecting to an external power supply through a slip ring will lead to complex wiring within the limited space of the engine.

[0004] Therefore, in order to solve the energy supply problem of jet engine rotor monitoring, it is urgent to propose a self-powered jet engine main shaft operation status monitoring system and method. Summary of the invention

[0005] In order to solve the above problems, the present invention discloses a self-powered jet engine main shaft operation status monitoring system and method. The technical solution is as follows:

[0006] The present invention provides a self-powered jet engine main shaft operating state monitoring system and method, the system comprising:

[0007] The thermoelectric conversion module is arranged on the inner wall of the engine main shaft rotor and is attached to it. When the engine is running, the thermoelectric conversion module converts thermal energy into electrical energy in the temperature difference environment caused by the cooling airflow inside the main shaft and the high-temperature gas on the outer wall.

[0008] The energy management module collects the electric energy converted by the thermoelectric conversion module and performs energy management, thereby effectively controlling the energy supply to the sensor module and the wireless transmission module.

[0009] The sensor module is attached to the inside of the engine main shaft rotor to sense the operating status information of the engine main shaft rotor.

[0010] The wireless transmission module is connected to the sensor module to collect sensor information and transmit it wirelessly to the host computer.

[0011] In one embodiment, the thermoelectric conversion module comprises a multi-layer structure:

[0012] The bottom surface of the heat-conducting substrate conforms to the inner wall of the jet engine main shaft rotor, so that the thermoelectric conversion module fits tightly with the inner wall of the main shaft, increasing the heat transfer efficiency of the hot end. A groove structure is set on the top of the heat-conducting substrate to fix the bottom copper-clad ceramic sheet.

[0013] The bottom copper-clad ceramic sheet is connected to the thermoelectric particles and serves as the bottom electrode thereof.

[0014] P-type and N-type thermoelectric particles are arranged alternately and fixed to the bottom electrode by welding.

[0015] The top copper-clad ceramic sheet is arranged above the P-type and N-type thermoelectric particles (5) as a top electrode and connects the thermoelectric pairs in series in the passage.

[0016] The heat dissipation fins are arranged above the top copper-clad ceramic sheet to increase the heat dissipation efficiency of the cold end.

[0017] In one embodiment, the energy management module includes a boost circuit module, an energy management circuit module, and an energy storage module. The boost module in the energy management module amplifies the voltage output by the thermoelectric conversion module and charges the energy storage module to store electrical energy in the energy storage capacitor. The energy management circuit module effectively controls the energy supply to the sensor module and the wireless transmission module according to the voltage range of the energy storage capacitor.

[0018] In one embodiment, the sensing module includes a strain gauge and a temperature sensor.

[0019] The present invention provides a self-powered jet engine main shaft operating state monitoring system and method, the method comprising:

[0020] The thermoelectric conversion module is attached to the inner wall of the jet engine main shaft rotor, and the thermoelectric conversion module is connected to the energy management circuit module by wires, and the energy management circuit module is connected to the sensor module and the wireless transmission module by wires.

[0021] After the jet engine main shaft rotor starts running, the thermoelectric conversion module starts to collect heat energy and convert it into electrical energy. The boost module in the energy management module amplifies the voltage output by the thermoelectric conversion module and charges the energy storage module to store the electrical energy in the energy storage capacitor. The energy management circuit module in the energy management module effectively controls the energy supply to the sensor module and the wireless transmission module according to the voltage range of the energy storage capacitor. The stress sensor and temperature sensor in the information acquisition module start to collect the temperature and strain information of the engine main shaft. The wireless transmission module transmits the collected temperature and strain information to the host computer.

[0022] The host computer receives the temperature and strain information and monitors the operating status of the engine spindle in real time.

[0023] The technical solution provided by the present invention may include the following beneficial effects:

[0024] 1. The present invention discloses a self-powered jet engine main shaft operation status monitoring system and method, wherein a thermoelectric conversion module is attached to the inner wall of the engine main shaft. The cooling gas inside the main shaft and the high temperature of the main shaft place the thermoelectric conversion module in a temperature difference environment. The thermoelectric conversion module can collect waste heat and convert thermal energy into electrical energy to power the sensor module and the wireless transmission module, so that the entire system does not require an additional power supply device, thereby solving the energy supply problem of the monitoring system.

[0025] 2. The present invention discloses a self-powered jet engine main shaft operation status monitoring system and method, wherein the thermoelectric conversion module converts the internal heat energy of the engine into electrical energy, and does not need to be connected to an external power supply. At the same time, the wireless transmission module collects sensor information and sends it to the host computer wirelessly, and does not need to be connected to an external wired connection. The entire system can rotate with the engine main shaft rotor, realizing wireless monitoring and solving the problem of complex wiring.

[0026] 3. The present invention discloses a self-powered jet engine main shaft operating status monitoring system and method, wherein the conformal thermal conductive base of the thermoelectric conversion module and the heat dissipation fin design on the top increase the heat transfer efficiency of the hot end of the thermoelectric conversion module and the heat dissipation efficiency of the cold end, thereby increasing the thermoelectric conversion efficiency.

[0027] 4. The present invention discloses a self-powered jet engine main shaft operating status monitoring system and method, wherein the energy management module controls the energy supply to the sensor module and the wireless transmission module in real time according to the voltage of the energy storage capacitor, thereby increasing the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention discloses a self-powered jet engine main shaft operating status monitoring system and method for the overall structure and electrical connection diagram of each module.

[0029] Figure 2 This is a schematic diagram of the application of the thermoelectric conversion module involved in the present invention on the inner wall of the main shaft;

[0030] Figure 3 It is a schematic diagram of the specific structure of the thermoelectric conversion module involved in the present invention.

[0031] In the figure: 1. Spindle rotor; 2. Thermoelectric conversion module; 3. Thermal conductive substrate; 4. Bottom copper-clad ceramic sheet; 5. P-type and N-type thermoelectric particles; 6. Top copper-clad ceramic; 7. Heat sink fins. DETAILED DESCRIPTION

[0032] In order to better illustrate the purpose and advantages of the present invention, the invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Embodiment 1:

[0034] The overall structure of a self-powered jet engine main shaft operation status monitoring system and method disclosed in this example and the electrical connection principle of each module are as follows: Figure 1 As shown. It is mainly composed of a thermoelectric conversion module, an energy management module, a sensor module, and a wireless transmission module. Among them, the thermoelectric conversion module is arranged on the inner wall of the engine main shaft rotor and fits with it. The thermoelectric conversion module is in a temperature difference environment caused by the cooling airflow inside the engine main shaft and the high-temperature gas on the outer wall, and converts thermal energy into electrical energy; the energy management module collects the thermal energy converted by the thermoelectric conversion module and performs energy management, thereby controlling the energy supply to the sensor module and the wireless transmission module; the sensor module is arranged inside the engine main shaft to collect the operating status information of the engine main shaft rotor; the wireless transmission module is connected to the sensor module, collects the sensor information and transmits it wirelessly to the host computer.

[0035] Specifically, according to Figure 2 It can be seen that the thermoelectric conversion module 2 is arranged on the inner wall 1 of the engine main shaft rotor and fits with it. The cooling airflow inside the main shaft and the high temperature outside the main shaft make the upper and lower surfaces of the thermoelectric conversion module 2 have a temperature difference, which can collect waste heat and convert it into electrical energy. By converting the recovered heat energy into electrical energy, it is supplied to the sensor module and the wireless transmission module, so that the overall system does not need an additional power supply device.

[0036] The specific structural diagram of the thermoelectric conversion module 2 is as follows Figure 3As shown. The thermoelectric conversion module 2 includes a multi-layer structure: a heat-conducting substrate 3, a bottom copper-clad ceramic sheet 4, P-type and N-type thermoelectric particles 5, a top copper-clad ceramic sheet 6, and a heat sink fin 7. The bottom surface of the heat-conducting substrate 3 is conformal to the inner wall of the jet engine main shaft rotor, so that the thermoelectric conversion module 2 is closely fitted with the inner wall of the shaft, increasing the heat transfer efficiency of the hot end. A groove structure is provided on the top of the heat-conducting substrate 3 to fix and embed the bottom copper-clad ceramic sheet 4, and the patterned copper-clad ceramic sheet serves as the bottom electrode of the thermoelectric particles. The P-type and N-type thermoelectric particles 5 are alternately connected and fixed on the bottom electrode by welding. The top copper-clad ceramic sheet 6 is arranged above the P-type and N-type thermoelectric particles 5, connected to the thermoelectric particles by welding, and the thermoelectric pairs are connected in series in the passage. The heat sink fin 7 is arranged above the top copper-clad ceramic sheet 6 to increase the heat dissipation efficiency of the cold end. Threaded holes are left on both sides of the entire thermoelectric conversion module for fixing and fitting the entire thermoelectric conversion module with the inner wall of the engine main shaft.

[0037] The energy management module is connected to the thermoelectric conversion module by a wire to manage and collect the electric energy converted by the thermoelectric conversion module. The energy management module includes a boost circuit module, an energy management circuit module, and an energy storage module. The boost circuit module amplifies the millivolt voltage output by the thermoelectric conversion module to a volt voltage. The energy management circuit module controls the storage and utilization of electric energy and supplies it to the back-end sensor module and the wireless transmission module. The energy storage module is composed of supercapacitors and is used to store electric energy.

[0038] The monitoring module includes a stress and temperature sensing module, which is connected to the energy management module by wires. The stress sensing module mainly includes a strain gauge, and the temperature sensing module mainly includes a temperature sensor. The strain gauge and the temperature sensor are attached to the inner wall of the main shaft to collect strain and temperature information when the engine main shaft is running.

[0039] The wireless transmission module is connected to the energy management module by wires, and is integrated with the stress and temperature sensor module and connected by wires. This module is mainly used to wirelessly transmit the information collected by the stress and temperature sensor module to the host computer, ultimately achieving the purpose of wireless monitoring.

[0040] Embodiment 2:

[0041] A self-powered jet engine main shaft operating status monitoring method, the method comprising:

[0042] The thermoelectric conversion module is attached to the inner wall of the jet engine main shaft rotor, and the thermoelectric conversion module is connected to the energy management circuit module by wires, and the energy management circuit module is connected to the sensor module and the wireless transmission module by wires.

[0043] After the jet engine main shaft rotor starts running, the thermoelectric conversion module starts to collect heat energy and convert it into electrical energy. The boost module in the energy management module amplifies the voltage output by the thermoelectric conversion module and charges the energy storage module to store the electrical energy in the energy storage capacitor. The energy management circuit module in the energy management module effectively controls the energy supply to the sensor module and the wireless transmission module according to the voltage range of the energy storage capacitor. The stress sensor and temperature sensor in the information acquisition module start to collect the temperature and strain information of the engine main shaft. The wireless transmission module transmits the collected temperature and strain information to the host computer.

[0044] The host computer receives the temperature and strain information and wirelessly monitors the operating status of the engine spindle in real time.

[0045] Finally, it should be noted that the specific description described above further illustrates the purpose, technical solutions and beneficial effects of the invention in detail, with the aim of helping to further understand the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-powered jet engine main shaft operating status monitoring system and method, characterized in that: The system comprises: The thermoelectric conversion module (2) is arranged on and attached to the inner wall (1) of the engine main shaft rotor. When the engine is running, the thermoelectric conversion module (2) converts thermal energy into electrical energy in a temperature difference environment caused by the cooling airflow inside the main shaft and the high-temperature gas on the outer wall. The energy management module collects the electric energy converted by the thermoelectric conversion module (2) and performs energy management, thereby effectively controlling the energy supply to the sensor module and the wireless transmission module. The sensor module is attached to the inside of the engine main shaft rotor to sense the operating status information of the engine main shaft rotor. The wireless transmission module is connected to the sensor module to collect sensor information and transmit it wirelessly to the host computer.

2. A self-powered jet engine main shaft operating status monitoring system and method according to claim 1, characterized in that: The thermoelectric conversion module (2) comprises a multi-layer structure: The heat-conducting base (3) has a bottom surface that conforms to the inner wall of the jet engine main shaft rotor, thereby making the thermoelectric conversion module (2) closely fit the inner wall of the main shaft, thereby increasing the heat transfer efficiency of the hot end. A groove structure is arranged on the top of the heat-conducting base (3) for fixing the bottom copper-clad ceramic sheet (4). The bottom copper-clad ceramic sheet (4) is a patterned copper-clad ceramic sheet connected to the thermoelectric particles (5) and serves as the bottom electrode thereof. P-type and N-type thermoelectric particles (5) are arranged alternately and fixed on the bottom electrode by welding. The top copper-clad ceramic sheet (6) is arranged above the P-type and N-type thermoelectric particles (5) as a top electrode and connects the thermoelectric pairs in series in the passage. The heat dissipation fins (7) are arranged above the top copper-clad ceramic sheet (6) to increase the heat dissipation efficiency of the cold end.

3. A self-powered jet engine main shaft operation status monitoring system and method according to claim 1, characterized in that: The energy management module includes a boost circuit module, an energy management circuit module, and an energy storage module. The boost module in the energy management module amplifies the voltage output by the thermoelectric conversion module and charges the energy storage module to store electrical energy in the energy storage capacitor. The energy management circuit module effectively controls the energy supply to the sensor module and the wireless transmission module according to the voltage range of the energy storage capacitor.

4. A self-powered jet engine main shaft operating status monitoring system and method according to claim 1, characterized in that: The sensing module includes a strain gauge and a temperature sensor.

5. A self-powered jet engine main shaft operating status monitoring system and method, characterized in that: The method includes: The thermoelectric conversion module (2) is attached to the inner wall of the jet engine main shaft rotor (1), and the thermoelectric conversion module (2) is connected to the energy management circuit module using a wire, and the energy management circuit module is connected to the sensor module and the wireless transmission module using a wire. After the jet engine main shaft rotor starts running, the thermoelectric conversion module (2) starts to collect heat energy and converts it into electrical energy. The boost module in the energy management module amplifies the voltage output by the thermoelectric conversion module and charges the energy storage module to store the electrical energy in the energy storage capacitor. The energy management circuit module in the energy management module effectively controls the energy supply to the sensor module and the wireless transmission module according to the voltage range of the energy storage capacitor. The stress sensor and temperature sensor in the information acquisition module start to collect the temperature and strain information of the engine main shaft. The wireless transmission module transmits the collected temperature and strain information to the host computer. The host computer receives the temperature and strain information and wirelessly monitors the operating status of the engine main shaft rotor in real time.

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