Pull-up heating anti-icing test device and test method

Abstract

This invention discloses a pull-up heating type anti-icing test device and method, belonging to the field of aero-engine anti-icing test technology. Its ice wind tunnel is used to simulate an icing environment; a test probe is inserted into the ice wind tunnel to measure the state parameters of the flow field; a heater is installed outside the ice wind tunnel for heating and de-icing; and a radial displacement mechanism is used to drive the test probe to move, allowing the probe's probe tip to move between the ice wind tunnel and the heater. This application has the advantage of reducing temperature testing errors of aero-engines in icing environments.

Description

Technical Field

[0001] This invention relates to the field of anti-icing testing technology for aero-engines, specifically to a pull-up heating type anti-icing testing device and testing method. Background Technology

[0002] Flying aircraft engines under icing conditions is a common and significant safety hazard, with flight accidents caused by engine icing occurring almost every year. Therefore, conducting environmental icing tests on aircraft engines, especially civil engines, is essential for research on anti-icing / de-icing technologies, and sub-zero temperature measurements are one of the most challenging aspects.

[0003] Existing anti-icing temperature probes are heated temperature probes that use a heating wire wound around a stagnation shield. The wire continuously heats the shield and the sensing element to prevent icing. The heating power of the wire is controlled by a downstream temperature controller. Current anti-icing temperature probes directly heat the stagnation shield, which typically reaches 100°C. Therefore, the radiation error from the stagnation shield to the sensing element is not negligible and requires calibration. However, the poor control precision of the heating wire over the stagnation shield leads to poor overall probe measurement accuracy. Furthermore, heated anti-icing probes have a complex structure, the heated stagnation shield is difficult to manufacture, and the assembly of the heating wire and stagnation shield requires advanced manufacturing processes, ultimately resulting in a high overall cost for the heated anti-icing temperature probe and its downstream temperature controller. Summary of the Invention

[0004] This invention provides a pull-up heating anti-icing test device and test method to solve the technical problem of large temperature test errors in existing aero-engines in icing environments.

[0005] According to one aspect of the present invention, a pull-up heating anti-icing test device and test method are provided, comprising: an ice wind tunnel for simulating an icing environment; a test probe for extending into the ice wind tunnel to measure the state parameters of the flow field; a heater disposed outside the ice wind tunnel for heating and de-icing; and a radial displacement mechanism for driving the test probe to move, so that the probe tip moves between the ice wind tunnel and the heater.

[0006] Optionally, the radial displacement mechanism includes a moving shaft, a displacement screw, and a motor. The motor is connected to the displacement screw in a driving connection. The moving shaft and the displacement screw are arranged along the moving direction of the test probe. A transfer plate is threaded onto the displacement screw. The transfer plate is slidably engaged with the moving shaft along the length of the moving shaft. The transfer plate is connected to the test probe to drive the test probe to move synchronously.

[0007] Optionally, the pull-up heating anti-icing test device further includes an icing probe for monitoring the icing state. The icing probe is positioned in the same place as the test probe, so that the icing state of the icing probe and the test probe are consistent, and the icing probe and the test probe move synchronously.

[0008] Optionally, a fixed support plate is provided on the adapter plate, the icing probe and the test probe are arranged in parallel, the tail ends of the icing probe and the test probe are installed on the fixed support plate, and the detection ends of the icing probe and the test probe extend into the ice wind tunnel through the heater.

[0009] Optionally, the heater is provided with a heating chamber, and the inner wall of the heating chamber is provided with heating wires.

[0010] Optionally, the end of the moving shaft and the displacement screw furthest from the ice tunnel is connected to a top plate.

[0011] Optionally, the fixed support plate is provided with two probe clamps, through which the icing probe and the test probe pass respectively, and probe fastening nuts are threadedly connected to the probe clamps.

[0012] Optionally, two moving shafts are arranged in parallel, and the displacement screw is located between the two moving shafts.

[0013] According to another aspect of the present invention, a lifting and heating type anti-icing test method is also provided, which includes the following steps:

[0014] S1 is equipped with a pull-up heating anti-icing test device;

[0015] S2 drives the icing probe and the test probe to move via a radial displacement mechanism, thereby enabling the icing probe and the test probe to detect...

[0016] The probe extends into the ice tunnel;

[0017] S3 circulates cold air into the ice tunnel to simulate an icing environment;

[0018] S4 measures the state parameters of the flow field through a test probe and determines whether icing has occurred based on the signal fed back by the icing probe.

[0019] When the icing probe returns an icing signal, the radial displacement mechanism pulls the ice probe and test probe upward, moving their detection ends into the heater cavity for de-icing. When the icing probe returns a no-ice signal, it indicates that de-icing is complete. The radial displacement mechanism 13 then moves the ice probe and test probe downward, returning their detection ends to the cold air tunnel.

[0020] Furthermore, for continuous signal acquisition, two sets of pull-up heating anti-icing test devices can be installed. The two sets of pull-up heating anti-icing test devices are used alternately. When one set of pull-up heating anti-icing test devices is de-icing, the other set is performing data testing.

[0021] Furthermore, step S1, installing the pull-up heating anti-icing test device, includes the following steps:

[0022] The icing probe and the test probe are respectively inserted into the corresponding probe clamps;

[0023] Move the icing probe and test probe vertically to adjust their positions;

[0024] The icing probe and the test probe are secured by the probe fastening nut.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] This solution effectively solves the radiation error problem caused by the high temperature of the stagnation shield in traditional heated probes by briefly heating the temperature probe from the icy environment to the heater for de-icing. This allows the probe to quickly return to the actual working environment after de-icing, maintaining a near-ambient temperature, significantly improving measurement accuracy and avoiding temperature deviations and measurement errors caused by prolonged high temperatures in traditional structures. Simultaneously, this design simplifies the probe structure, eliminating reliance on complex stagnation shield heating wire winding methods, thereby reducing manufacturing difficulty and cost, and improving system reliability and stability. Furthermore, this solution offers the advantages of automated de-icing and continuous data acquisition. Through the linkage of a motor and displacement mechanism, the probe can automatically be pulled into the heating chamber for de-icing after detecting an icing signal and then quickly return, ensuring continuous data acquisition and avoiding measurement interruptions. In addition, the system employs a dual-device alternating operation mechanism, where one device performs de-icing while the other continues testing, ensuring uninterrupted monitoring of status parameters and improving working efficiency in low-temperature environments. The modular design further enhances the maintainability of the system, facilitates the replacement of components and on-site maintenance, and has high adaptability. It can be widely used in the air intake devices of different aero-engines, providing a reliable and accurate solution for temperature measurement in icing environments.

[0027] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the pull-up heating anti-icing test device of the present invention;

[0030] Figure 2 This is a schematic diagram of the radial displacement mechanism of the present invention;

[0031] Figure 3 This is a schematic diagram of the installation of two sets of pull-up heating anti-icing test devices according to the present invention.

[0032] Legend:

[0033] 1. Ice tunnel; 2. Heater; 3. Test probe; 4. Icing probe; 5. Fixed support plate; 6. Probe fastening nut; 7. Top plate; 8. Fixed shaft; 9. Displacement screw; 10. Adapter support plate; 11. Adapter bolt; 12. Motor; 13. Radial displacement mechanism; 14. Probe clamp. Detailed Implementation

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0035] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0036] This application discloses a pull-up heating type anti-icing test device and test method.

[0037] Reference Figure 1 The pull-up heating anti-icing test device includes an ice wind tunnel, a test probe, a heater, and a radial displacement mechanism. The ice wind tunnel simulates an icing environment; the test probe is inserted into the ice wind tunnel to measure the flow field's state parameters; the heater is located outside the ice wind tunnel for heating and de-icing; and the radial displacement mechanism drives the test probe to move between the ice wind tunnel and the heater. The pull-up heating anti-icing test device uses the radial displacement mechanism to drive the test probe between the ice wind tunnel and the heater. When the test probe is inserted into the ice wind tunnel, the simulated icing environment causes rapid icing on the probe surface. The probe is then pulled into the heater outside the ice wind tunnel for heating and de-icing. After the heater melts and removes the ice layer from the probe, it is returned to the ice wind tunnel to continue measuring the flow field's state parameters. This allows for continuous monitoring and accurate measurement of flow field parameters under icing conditions, effectively ensuring the probe's normal operation in low-temperature environments and guaranteeing data continuity and accuracy.

[0038] The radial displacement mechanism includes a moving shaft, a displacement screw, and a motor. The motor is connected to the displacement screw via a drive mechanism. The moving shaft and displacement screw are positioned along the direction of the test probe's movement. A transfer plate is threaded onto the displacement screw, and the transfer plate slides along the length of the moving shaft. The transfer plate is connected to the test probe to drive the test probe to move synchronously. The radial displacement mechanism drives the displacement screw to rotate via the motor, thereby causing the transfer plate, which is threaded onto the screw, to slide along the direction of the moving shaft. The transfer plate is connected to the test probe, ensuring that the test probe can move synchronously between the ice tunnel and the heater under the action of the radial displacement mechanism. This allows the probe to be quickly pulled to the heater for de-icing after completing measurements in the icy environment, and then returned to the icy environment to continue measuring, thus achieving continuous and accurate operation of the probe under low-temperature icing conditions.

[0039] The pull-up heating type anti-icing test device also includes an icing probe for monitoring the icing state. The icing probe is positioned identically to the test probe, ensuring that the icing state of both probes is the same. The icing probe and the test probe move synchronously. The pull-up heating type anti-icing test device uses an icing probe positioned next to the test probe, moving synchronously with it. When the icing probe detects icing, it sends a signal, and a radial displacement mechanism pulls both the icing probe and the test probe together into the heater for de-icing. After de-icing, it returns to the icing environment to continue measurement. This allows the test probe to accurately and continuously acquire flow field parameters in a low-temperature environment and effectively avoids measurement inaccuracies caused by icing.

[0040] Reference Figure 2 The adapter plate is equipped with a fixed support plate. The icing probe and the test probe are arranged in parallel, with their tail ends mounted on the fixed support plate. The detection ends of the icing probe and the test probe extend through the heater into the ice wind tunnel. This design ensures that the icing probe and the test probe maintain the same icing state and position, enabling synchronous movement and accurate monitoring and response to icing conditions. This allows the system to monitor state parameters in the low-temperature icing environment in real time and perform synchronous de-icing operations when necessary.

[0041] The heater contains a heating chamber with heating wires installed on its inner wall. When the icing probe and the test probe are pulled into the heating chamber, the heating wires begin to heat up, rapidly raising the temperature inside the chamber. This melts and removes the ice layer on the probe surface, restoring the probe's measurement capability. The probe is then returned to the ice wind tunnel to continue collecting flow field data. This process ensures the probe's normal operation and measurement accuracy in a low-temperature environment, avoiding data inaccuracies caused by icing.

[0042] The moving shaft and the displacement screw, located away from the ice wind tunnel, are connected to a top plate. This structural design provides stable support for the radial displacement mechanism, making the entire mechanism more stable. This ensures that the movement path remains accurate and reliable when the motor drives the displacement screw to rotate, causing the adapter plate and test probe to move up and down. It also prevents the probe from shifting or shaking during movement, ensuring that the test probe and icing probe can successfully complete the de-icing and data measurement tasks.

[0043] Two probe chucks are installed on the fixed support plate. The icing probe and the test probe pass through their respective probe chucks, and probe fastening nuts are threaded onto the probe chucks. This design ensures that the icing probe and the test probe are stable and reliable throughout the entire operation, and will not shift due to displacement or vibration. This guarantees the precise positioning and synchronous movement of the probes within the ice wind tunnel and the heating chamber, thereby improving the measurement stability and data accuracy of the system.

[0044] Two parallel moving shafts are arranged, with a displacement screw located between them. This provides more stable dual-axis support for the movement of the adapter plate, ensuring that when the displacement screw drives the adapter plate and the icing probe and test probe fixed on it under motor drive, it can move smoothly along a precise straight path, thus avoiding wobbling or deviation of the probes during lifting and de-icing.

[0045] According to another aspect of the present invention, a lifting and heating type anti-icing test method is also provided, which includes the following steps:

[0046] Install the pull-up heating anti-icing test device in S1. Pass the icing probe and test probe through the corresponding probe clamps on the fixed support plate, ensuring the probe detection ends extend towards the ice wind tunnel. Then, precisely adjust the probe positions by vertically moving the probes according to the required measurement height and location, ensuring that both the icing probe and test probe reach the specified measurement positions in both the ice wind tunnel and the heating chamber. After position adjustment, use the threaded fastening nuts on the probe clamps to firmly fix the icing probe and test probe within the probe clamps, ensuring the probes remain stable and do not loosen throughout the test, avoiding the impact of displacement or vibration on measurement accuracy.

[0047] S2 drives the icing probe and the test probe to move through a radial displacement mechanism, so that the detection ends of the icing probe and the test probe extend into the ice wind tunnel.

[0048] S3 introduces cold air into the ice wind tunnel to simulate an icing environment; it also regulates the temperature and humidity inside the wind tunnel to simulate a low-temperature icing environment under natural conditions, thus creating an icing phenomenon and providing a realistic working environment for the test probe.

[0049] S4 measures the state parameters of the flow field through the test probe and determines whether icing has occurred based on the signal fed back by the icing probe. The test probe starts measuring the state parameters of the flow field inside the ice wind tunnel (such as temperature and humidity). At the same time, the icing probe continuously feeds back signals to monitor whether the probe is icing up, so as to determine whether de-icing is needed.

[0050] When the icing probe sends an icing signal (S5), the radial displacement mechanism pulls the ice probe and test probe upwards, moving their detection ends into the heater cavity for de-icing. When the icing probe sends a no-ice signal, de-icing is complete. The radial displacement mechanism then moves the ice probe and test probe downwards, returning their detection ends to the cold air tunnel. Once the icing probe detects icing, the system controls the radial displacement mechanism to pull the probe into the heater cavity outside the ice air tunnel. The heating wire heats the inner wall of the heating cavity, rapidly melting the ice layer on the probe surface. When the icing probe sends a no-ice signal, the de-icing process is complete. The radial displacement mechanism then returns the probe detection end to the ice air tunnel, resuming normal measurement operations.

[0051] Reference Figure 3 To achieve continuous signal acquisition, two sets of pull-up heating anti-icing testing devices can be installed. These devices are used alternately; while one set is de-icing, the other performs data testing. By installing two sets of pull-up heating anti-icing testing devices and having them work alternately, when one set pulls the probe into the heating chamber for de-icing, the probe of the other set remains in the ice tunnel to continuously collect data. After de-icing is complete, the original probe returns to the ice tunnel to continue measurement, while the other probe is pulled into the heating chamber for de-icing. This alternating method ensures uninterrupted data acquisition, achieving continuous signal acquisition in icy environments and effectively improving measurement efficiency and data integrity.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pull-up heating type anti-icing testing device, characterized in that, include: Ice tunnels are used to simulate icy environments; Test probes are used to extend into the ice tunnel to measure the state parameters of the flow field; A heater, located outside the ice tunnel, is used for heating and de-icing. An icing probe is used to monitor the icing state. The icing probe and the test probe are positioned in the same position so that the icing state of the probes of the icing probe and the test probe are the same. The icing probe and the test probe move synchronously. The detection ends of the icing probe and the test probe extend into the ice wind tunnel through the heater. A radial displacement mechanism is used to drive the test probe to move between the ice tunnel and the heater.

2. The pull-up heating anti-icing testing device according to claim 1, characterized in that: The radial displacement mechanism includes a moving shaft, a displacement screw, and a motor. The motor is connected to the displacement screw in a driving connection. The moving shaft and the displacement screw are arranged along the moving direction of the test probe. A transfer plate is threaded onto the displacement screw. The transfer plate is slidably engaged with the moving shaft along the length of the moving shaft. The transfer plate is connected to the test probe to drive the test probe to move synchronously.

3. The pull-up heating anti-icing testing device according to claim 2, characterized in that: A fixed support plate is provided on the adapter plate, and the icing probe and the test probe are arranged in parallel, with their tail ends mounted on the fixed support plate.

4. The pull-up heating anti-icing testing device according to claim 1, characterized in that: The heater has a heating chamber inside, and the inner wall of the heating chamber is provided with heating wires.

5. The pull-up heating anti-icing testing device according to claim 2, characterized in that: The moving shaft and the displacement screw are connected to the top plate at the end away from the ice tunnel.

6. The pull-up heating anti-icing testing device according to claim 3, characterized in that: The fixed support plate is equipped with two probe clamps. The icing probe and the test probe pass through the corresponding probe clamps respectively, and the probe clamps are threaded with probe fastening nuts.

7. A lifting-heating anti-icing test method, using the lifting-heating anti-icing test device according to any one of claims 1-6, characterized in that, Includes the following steps: S1 is equipped with a pull-up heating anti-icing test device; S2 drives the icing probe and the test probe to move through a radial displacement mechanism, so that the detection ends of the icing probe and the test probe extend into the ice wind tunnel; S3 circulates cold air into the ice tunnel to simulate an icing environment; S4 measures the state parameters of the flow field through a test probe and determines whether icing has occurred based on the signal fed back by the icing probe. When the icing probe returns an icing signal, the radial displacement mechanism pulls the ice probe and test probe upward, moving their detection ends into the heater cavity for de-icing. When the icing probe returns a no-ice signal, it indicates that de-icing is complete. The radial displacement mechanism then moves the ice probe and test probe downward, returning their detection ends to the cold air tunnel.

8. The lifting and heating anti-icing test method according to claim 7, characterized in that: For continuous signal acquisition, two sets of pull-up heating anti-icing test devices can be installed. The two sets of pull-up heating anti-icing test devices are used alternately. When one set of pull-up heating anti-icing test devices is de-icing, the other set is performing data testing.

9. The lifting and heating anti-icing test method according to claim 8, characterized in that: Step S1, installing the pull-up heating anti-icing test device, includes the following steps: The icing probe and the test probe are respectively inserted into the corresponding probe clamps; Move the icing probe and test probe vertically to adjust their positions; The icing probe and the test probe are secured by the probe fastening nut.

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