A thermal load loading device and method

Abstract

The present invention provides a thermal load loading device and method, which includes a number of series-connected modular electric heating modules and modular temperature measuring modules. The series connection is head-to-tail rotational series connection and / or up-and-down series connection. The number of the modular electric heating modules is connected to a heating controller, and the number of the modular temperature measuring modules is connected to a test system. The number of the modular electric heating modules and the modular temperature measuring modules is determined according to the size of the test engine casing and the requirements for applying the test thermal load. The thermal load loading device of the present invention can be applicable to engine casings of different size specifications to apply thermal load to the engine casing test.

Description

Technical Field

[0001] The present invention belongs to the technical field of aero-engine test, and particularly relates to a thermal load loading device and method. Background Art

[0002] In the development process of aero-engine casing structural parts, relevant mechanical tests (such as static strength test, fatigue strength test, stiffness test, creep test) need to be carried out in accordance with relevant standards to verify whether the product meets the design requirements. In such tests, a load spectrum is installed to apply thermal load to the casing structural test piece. At present, the main loading methods are hot air loading and electric heating furnace loading. However, the hot air loading method has deficiencies such as slow control response, low efficiency, high cost, and poor safety; while the electric heating furnace loading is generally customized according to the structural dimensions such as the diameter and height of the casing, and different sizes of heating furnaces need to be applied for different casings, so the versatility is poor. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a thermal load loading device and method, which can be applicable to casings of different size specifications and apply thermal load to the casing test.

[0004] To achieve the above object, the present invention provides the following technical solution: A thermal load loading device includes a plurality of series-connected modular electric heating modules and modular temperature measurement modules. The series connection is head-to-tail rotational series connection and / or up-and-down series connection. The plurality of modular electric heating modules are all connected to a heating controller, and the plurality of modular temperature measurement modules are all connected to a test system. The number of the modular electric heating modules and modular temperature measurement modules is determined according to the size of the test casing and the requirements for applying test thermal load.

[0005] Further, when the plurality of modular electric heating modules are connected in series, their heating ends are all arranged facing inwards or outwards.

[0006] Further, the modular electric heating module includes a modular module body that can be connected in series. One side of the modular module body is a curved surface, and an electric heating wire is arranged on one side of the curved surface. Both ends of the electric heating wire horizontally penetrate through the upper and lower end faces of the modular module body and extend out on the other side and are connected to the heating controller through a terminal.

[0007] Further, a smooth heat-resistant metal coating is applied on the curved surface.

[0008] Further, the electric heating wire is replaceable.

[0009] Further, the modular temperature measurement module includes a modular module body that can be connected in series. One side of the modular module body is a curved surface, and a temperature measurement hole is provided on the modular module body that penetrates the curved surface and the corresponding surface of the curved surface. The temperature measurement hole is used for the sensing end of the temperature sensor to pass through to measure the surface temperature of the test piece, and the transmission end of the temperature sensor is connected to the test system.

[0010] Further, the modular module body includes a housing, an upper cover, and a bottom cover. The inside of the housing is hollow and filled with heat-resistant cotton. The cross-section of the housing is a convex structure. The upper cover and the bottom cover are respectively fixed to the upper end face and the lower end face of the housing in a staggered manner. Outer connection holes are provided corresponding to each other up and down on one side of the upper cover and the bottom cover. Inner connection holes penetrating the upper and lower end faces are provided on the other side of the housing away from the outer connection holes. The outer connection hole of the previous modular module body is connected to the inner connection hole of the next modular module body through a connecting pin shaft to achieve the serial connection of the modular module bodies in a head-to-tail rotational manner. The connecting pin shaft on the lower modular module body extends into the outer connection hole and the inner connection hole of the corresponding upper modular module body to achieve the serial connection of the modular module bodies up and down.

[0011] Further, the curved surface is composed of curved surface A, curved surface B, and curved surface C. One side of the housing is curved surface B, one side of the upper cover is curved surface C, and one side of the bottom cover is curved surface A. Curved surface A, curved surface B, and curved surface C are parabolic surfaces with the same parameters and stacked along the height direction, and their foci coincide to form a vertical line. When setting the heating wire, the center of the heating wire is located on this line.

[0012] The present invention also provides a method for using a thermal load loading device, and the specific steps are as follows:

[0013] S1 Determine the number of layers of the thermal load loading device according to the height of the test engine case. The thermal load loading device needs to cover the entire height of the engine case.

[0014] S2 According to the diameter of the test engine case and combined with the requirements for applying the test thermal load, obtain the number of modular electric heating modules and modular temperature measurement modules required for a single-layer thermal load loading device and determine the power specifications of the modular electric heating modules.

[0015] S3 Connect the modular electric heating modules and the modular temperature measurement modules in series in a head-to-tail rotational manner and / or in series up and down, and the heating end of the modular electric heating module faces inward or outward.

[0016] Further, in S2, the requirements for applying the test thermal load determine the number and positions of the temperature measurement points, so as to determine the number of modular temperature measurement modules for each layer.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The present invention provides a thermal load loading device. Through a number of series-connected building block type electric heating modules and building block type temperature measuring modules, thermal load loading devices of different size specifications can be combined to adapt to casings of different sizes. Moreover, the positions and quantities of the building block type electric heating modules and building block type temperature measuring modules can be arbitrarily combined and adjusted according to test requirements, with strong flexibility. And the series-connected building block type electric heating modules and building block type temperature measuring modules can all work independently. The damage of a single module does not affect the use of other modules, with high reliability. Each module can be replaced separately, and each component inside the module can also be repaired or replaced separately, with high maintainability. There is no need to customize a large number of heating devices of different size specifications for casings of different structural sizes, greatly saving the production cost and production time.

[0019] Further, the thermal load loading device of the present invention can be configured such that the heating ends of the building block type electric heating modules all face inwards or outwards, so that an external heating mode and an internal heating mode can be combined, with strong versatility. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of a building block type electric heating module;

[0021] Figure 2 is an exploded structural view of a building block type electric heating module;

[0022] Figure 3 is a schematic diagram of a building block type temperature measuring module;

[0023] Figure 4 is an exploded structural view of a building block type temperature measuring module;

[0024] Figure 5 is a schematic diagram of the combination mode between modules with the heating wire facing inwards;

[0025] Figure 6 is a schematic diagram of a single-layer heating module group with the heating wire facing inwards;

[0026] Figure 7 is a schematic diagram of a multi-layer combination mode with the heating wire facing inwards;

[0027] Figure 8 is a schematic diagram of a multi-layer heating module group with the heating wire facing inwards;

[0028] Figure 9 is a schematic diagram of a single-layer heating module group with the heating wire facing outwards;

[0029] In the drawings: 1 housing, 2 upper cover, 3 bottom cover, 4 pull rod, 5 terminal, 6 heating wire, 7 connecting pin shaft, 8 module connecting wire; 9 power supply connecting wire; 10 temperature sensor, 11 temperature measuring hole, 12 temperature sensor connecting wire. Detailed Embodiment

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] 1. As Figures 1 to 4 described, the present invention provides a thermal load loading device, which includes a plurality of building block type electric heating modules and building block type temperature measuring modules. The building block type electric heating modules and the building block type temperature measuring modules can be connected in series by rotating end to end or in series up and down; the building block type electric heating modules are connected to a heating controller for controlling the heating time and temperature, and the building block type temperature measuring modules are connected to a test system for measuring the surface temperature of the test piece.

[0032] Specifically, connection holes are provided at the front and rear of the building block type electric heating modules and the building block type temperature measuring modules. By arranging a connecting pin shaft 7 in the connection holes, the building block type electric heating modules and the building block type temperature measuring modules can be connected in series by rotating end to end or in series up and down;

[0033] 2. The building block type electric heating module includes a building block type module body that can be connected in series, and an electric heating wire 6 arranged on one side of the building block type module body. Both ends of the electric heating wire 6 horizontally penetrate the upper and lower end faces of the building block type module body and are connected to a terminal 5 on the other side. The surface of the building block type module body where the electric heating wire 6 is arranged is a curved surface, and a smooth heat-resistant metal coating is applied on the curved surface, which can effectively reflect the heat emitted by the electric heating wire 6.

[0034] Preferably, the electric heating wires 6 can be connected in series together or individually to the heating controller, which can realize the unified control or individual control of the building block type electric heating modules, and has high controllability;

[0035] Preferably, by replacing the electric heating wire 6, building block type electric heating modules with different power specifications can be made and selected according to the test requirements.

[0036] 3. The building block type temperature measuring module includes a building block type module body that can be connected in series, and a temperature sensor 10 arranged thereon. The sensing end of the temperature sensor 10 passes through the building block type module body for measuring the surface temperature of the test piece, and the transmission end is connected to the test system.

[0037] Preferably, the temperature sensor 10 can be either a contact type or a non-contact type.

[0038] Preferably, the building-block module body includes a housing 1, an upper cover 2, a bottom cover 3 and a pull rod 4. Among them, the housing 1, the upper cover 2 and the bottom cover 3 are all fired from heat-resistant ceramic materials. The inside of the housing 1 is hollow and filled with heat-resistant cotton to reduce heat dissipation. The cross-section of the housing 1 is a convex structure. The upper cover 2 and the bottom cover 3 are respectively and staggeredly fixed on the upper end face and the lower end face of the housing 1 through the pull rod 4 penetrating the upper and lower end faces of the housing 1. Outer connection holes are provided corresponding to the upper and lower sides on one side of the upper cover 2 and the bottom cover 3, and inner connection holes penetrating the upper and lower end faces are provided on the other side of the housing 1 far from the outer connection holes. The outer connection hole of the previous building-block module body is connected to the inner connection hole of the next building-block module body through a connecting pin shaft 7 to realize the series connection of the building-block electric heating modules; the connecting pin shaft 7 in the outer connection hole of the lower building-block module body extends into the outer connection hole of the corresponding upper building-block module body to realize the series connection of the building-block module bodies up and down.

[0039] Preferably, the above-mentioned curved surface is composed of curved surface A, curved surface B, and curved surface C. One side of the housing 1 is curved surface B, one side of the upper cover 2 is curved surface C, and one side of the bottom cover 3 is curved surface A. Curved surface A, curved surface B, and curved surface C are paraboloids with the same parameters and stacked along the height direction, and their foci coincide as a vertical line. When setting the heating wire 6, the center of the heating wire 6 is located on this line;

[0040] Preferably, a temperature measurement hole 11 penetrating the above-mentioned curved surface and the corresponding side surface is provided on the housing 1, and the sensing end of the temperature sensor 10 passes through the temperature measurement hole 11 to measure the surface temperature of the test piece.

[0041] Preferably, connecting the heating wire 6 to the building-block module body is the building-block electric heating module; connecting the temperature sensor 10 to the building-block module body is the building-block temperature measurement module.

[0042] Preferably, the number of the outer connection holes and the inner connection holes is the same, and at least 1 is provided.

[0043] As Figure 5 、 6 shown, when assembling the module combination with the single-layer heating wire facing inwards of the thermal load loading device of the present invention, the temperature sensor 10 or the heating wire 6 is set on the building-block module body according to requirements. The outer connection hole of the previous building-block module body and the inner connection hole of the next building-block module body are aligned up and down, and the connecting pin shaft 7 is inserted into the outer connection hole and the inner connection hole to realize the series connection of the building-block module bodies. The heating wire 6 is arranged facing inwards, and each building-block module body can rotate freely around the connecting pin shaft 7;

[0044] Then use the module connection wire 8 to connect the terminal posts 5 of the heating wires 6 of each module, and tighten them with small screws;

[0045] Then use the power connection wire 9 to connect the building-block electric heating module to the power interface of the heating controller, and tighten it with small screws;

[0046] Finally, connect the temperature sensor 10 to the test system with the temperature sensor connecting wire 12 to transmit temperature analog or digital signals, thus forming a single-layer thermal load loading device.

[0047] Preferably, the module connecting wire 8 and the power supply connecting wire 9 are both special high-temperature resistant wires.

[0048] As Figure 9 shown, setting the electric heating wire 6 facing outward can form a single-layer thermal load loading device with the heating wire facing outward.

[0049] As Figure 7 、 8 shown, when assembling the multi-layer internal heating mode with the heating wire facing inward of the thermal load loading device of the present invention, align each outer connection hole and inner connection hole of the upper heating module group with the corresponding connection pin 7 on the lower single-layer thermal load loading device. The connection pin 7 has sufficient length and will extend out a section after being inserted into the hole and insert into the connection hole of the adjacent layer. After connection, a multi-layer thermal load loading device is formed.

[0050] When the thermal load loading device of the present invention is in use, the specific steps are as follows:

[0051] First, determine the number of modular body blocks required for each layer according to the diameter of the test engine case, ensure that all modular body blocks can sufficiently accommodate the test piece after forming a ring, and leave an appropriate gap; then determine the number of layers required according to the height of the test engine case to ensure that the entire height of the engine case is covered.

[0052] Secondly, according to the requirements of the test thermal load application, select the number and position of the temperature measurement points, as well as the power specifications of the heating modules;

[0053] Finally, as Figure 6 or Figure 9 shown, combine into a single-layer heating module group with the heating wire facing inward or a single-layer heating module group with the heating wire facing outward. When the diameter of the engine case is small, a single-layer heating module group with the heating wire facing inward can be used and placed on the outer side of the circumference of the engine case; when the diameter of the engine case is large, a single-layer heating module group with the heating wire facing outward can be used and placed on the inner side of the circumference of the engine case, or both types can be used simultaneously.

Claims

1. A thermal load loading device, characterized in that, It includes a number of series-connected modular electric heating modules and modular temperature measuring modules. The series connection is head-to-tail rotational series connection and / or up-and-down series connection. A number of modular electric heating modules are all connected to a heating controller, and a number of modular temperature measuring modules are all connected to a test system. The quantities of the modular electric heating modules and modular temperature measuring modules are determined according to the size of the test engine casing and the requirements for applying test thermal loads. The modular electric heating module includes a modular module body that can be connected in series. One side of the modular module body is a curved surface, and an electric heating wire (6) is arranged on one side of this curved surface. Both ends of the electric heating wire (6) horizontally penetrate the upper and lower end faces of the modular module body and extend out through a terminal post (5) to be connected to the heating controller. The modular module body includes a housing (1), an upper cover (2), and a bottom cover (3). The interior of the housing (1) is hollow and filled with heat-resistant cotton. The cross-section of the housing (1) is a convex structure. The upper cover (2) and the bottom cover (3) are respectively fixed at the upper end face and the lower end face of the housing (1) in a staggered manner. Outer connection holes are correspondingly arranged at the upper and lower positions on one side of the upper cover (2) and the bottom cover (3). An inner connection hole penetrating the upper and lower end faces is arranged on the other side of the housing (1) away from the outer connection holes. The outer connection hole of the previous modular module body is connected to the inner connection hole of the next modular module body through a connecting pin shaft (7) to achieve head-to-tail rotational series connection of the modular module bodies. The connecting pin shaft (7) on the lower modular module body extends into the outer connection hole and the inner connection hole of the corresponding upper modular module body to achieve up-and-down series connection of the modular module bodies.

2. The thermal load loading device according to claim 1, wherein, When the number of modular electric heating modules is connected in series, their heating ends are all arranged facing inwards or outwards.

3. A thermal load loading device according to claim 1, characterized in that, A smooth heat-resistant metal coating is applied to the curved surface.

4. A thermal load loading device according to claim 1, characterized in that, The electric heating wire (6) is replaceable.

5. A thermal load loading device according to claim 1, characterized in that, The modular temperature measuring module includes a modular module body that can be connected in series. One side of the modular module body is a curved surface, and a temperature measuring hole (11) penetrating the curved surface and the corresponding surface of the curved surface is arranged on the modular module body. The temperature measuring hole (11) is used for the sensing end of a temperature sensor (10) to pass through to measure the surface temperature of the test piece. The transmission end of the temperature sensor (10) is connected to the test system.

6. The thermal load loading device according to claim 1, characterized in that, The curved surface is composed of curved surface A, curved surface B, and curved surface C. One side of the housing (1) is curved surface B, one side of the upper cover (2) is curved surface C, and one side of the bottom cover (3) is curved surface A. Curved surface A, curved surface B, and curved surface C are paraboloids with the same parameters and stacked in the height direction, and their foci coincide into a vertical line. When arranging the electric heating wire (6), the center of the electric heating wire (6) is located on this line.

7. The usage method of a thermal load loading device according to claim 1, characterized in that, The specific steps are as follows: S1 Determine the number of layers of the thermal load loading device according to the height of the test engine casing. The thermal load loading device needs to cover the entire height of the engine casing. S2 According to the diameter of the test engine casing and combined with the requirements for applying test thermal loads, obtain the quantities of the modular electric heating modules and modular temperature measuring modules required for a single-layer thermal load loading device and determine the power specifications of the modular electric heating modules. S3 Connect the modular electric heating modules and modular temperature measuring modules in head-to-tail rotational series connection and / or up-and-down series connection, and the heating ends of the modular electric heating modules face inwards or outwards.

8. The usage method of a thermal load loading device according to claim 7, characterized in that, In S2, the requirements for applying the test thermal load are to determine the number and positions of the temperature measurement points, so as to determine the number of modular temperature measurement modules for each layer of building blocks.

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