Cylindrical shell thermal vibration test platform and its use method

Abstract

The invention relates to a cylindrical shell thermal vibration test platform and a method for using the platform, which comprises a steel frame, a combustion component, a lamp array component and a flange seat. The steel frame comprises a flat plate and two vertical side plates. The left and right ends of the lower side surface of the flat plate are connected to the upper ends of the vertical side plates. Through holes are provided in the middle of the flat plate and the vertical side plates. The inner end of the cylindrical shell is installed at one of the through holes on the steel frame via the flange seat. The cylindrical shell is coaxial with the through hole at its installation position. The combustion component comprises a burner and a conical sleeve. The lamp array component comprises a lamp holder, a lamp rack, a support, an insulation sleeve, an exciter and a power amplifier. The platform can measure the dynamic parameters of a test piece under a high temperature environment, has strong versatility, can use a burner to perform a dynamic heating test, and can also use a quartz lamp array to perform a static heating test. At the same time, measurements can be performed in multiple directions, horizontally or vertically.

Description

Technical Field

[0001] The invention relates to a cylindrical shell thermal vibration test platform and a use method thereof. Background Art

[0002] Thermal vibration tests on high-temperature resistant cylindrical shells involve aerospace vehicle structures and other uses. At present, theoretical analysis and numerical calculations of thermal vibration problems have been conducted at home and abroad. High temperature and temperature gradient in high-temperature resistant cylindrical shells will have a significant impact on their vibration characteristics. The test of high-temperature resistant cylindrical shells needs to be carried out in a high-temperature environment, and the test piece is difficult to measure in high temperature. Ordinary sensors are difficult to measure in a high-temperature environment above 300°C. If sensors such as laser vibrometers are used, the cost will be too high. Traditional test platforms usually only conduct tests and measurements in one direction, or only measure one heating method. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a cylindrical shell thermal vibration test platform and a use method thereof.

[0004] The solution adopted by the present invention to solve the technical problem is a cylindrical shell thermal vibration test platform, including a steel frame, a combustion component, a lamp array component, and a flange seat;

[0005] The steel frame includes a flat plate and two vertical side plates. The left and right ends of the lower side of the flat plate are connected to the upper ends of the vertical side plates. Through holes are opened in the middle of the flat plate and the vertical side plates. The inner end of the cylindrical shell is installed at one of the through holes on the steel frame through a flange seat. The cylindrical shell is coaxial with the through hole at its installation position.

[0006] The combustion assembly includes a burner and a conical sleeve, wherein the small end of the conical sleeve is connected to the output end of the burner, and the outer periphery of the large end of the conical sleeve is provided with a flange portion for connecting to a flat plate or a vertical side plate, and the inner diameter of the large end of the conical sleeve is not greater than the diameter of the through hole;

[0007] The lamp array assembly includes a lamp holder, a lamp rack, a support, an insulation sleeve, an exciter, and a power amplifier. The insulation sleeve is arranged outside the cylindrical shell, and there is a gap between the insulation sleeve and the cylindrical shell. When the cylindrical shell is installed on the vertical side plate, the insulation sleeve is erected on the support, and when the cylindrical shell is installed on the flat plate, the insulation sleeve is erected on the flange seat. A number of quartz lamps are evenly distributed on the circumference of the outer side surface of the lamp holder. The lamp holder passes through the cylindrical shell, and there is a gap between the lamp holder and the cylindrical shell. Lamp racks are installed at both ends of the lamp holder. A ceramic insulation piece is installed on the top of the outer end of the cylindrical shell, and a displacement sensor is installed on the ceramic insulation piece. The exciter is installed on the outer circumference of the outer end of the cylindrical shell. The moving end of the exciter is connected to the cylindrical shell through a force sensor. The exciter is electrically connected to the power amplifier. The quartz lamp, power amplifier, displacement sensor, and force sensor are all electrically connected to a computer.

[0008] Furthermore, the displacement sensor is an eddy current displacement sensor.

[0009] Furthermore, 14 quartz lamp tubes arranged along the axial direction of the lamp holder are evenly distributed on the circumference of the outer side surface of the lamp holder, and the lamp holder is coaxial with the cylindrical shell.

[0010] Furthermore, the flange seat is provided with an annular groove for accommodating the end of the cylindrical shell, and the outer periphery of the flange seat is provided with radial screw holes connected to the annular groove, and locking pins for locking the cylindrical shell are installed in the radial screw holes.

[0011] Furthermore, a horizontal connecting seat is installed on the outer side surface of the lower end of the vertical side plate, and a longitudinal mounting strip hole is opened on the horizontal connecting seat.

[0012] Furthermore, a plurality of grooves are provided on the lower side surface of the vertical side plate at intervals along the longitudinal direction.

[0013] Furthermore, the thermal insulation sleeve is composed of two thermal insulation sleeve bases, and the ends of the two thermal insulation sleeve bases are connected via a connecting buckle.

[0014] A method for using a cylindrical shell thermal vibration test platform:

[0015] Combustion heating thermal vibration test: install the steel frame on the foundation, install the cylindrical shell on the outer side of a through hole on the steel frame through the flange seat as needed, install the burner in the steel frame, connect the large end of the conical sleeve to the inner side of the through hole on the steel frame where the cylindrical shell is installed, connect the small end of the conical sleeve to the output end of the burner, and start the burner to heat the cylindrical shell;

[0016] Quartz lamp thermal vibration test: install the steel frame on the foundation, install the cylindrical shell on the outer side of a through hole on the steel frame through the flange seat as needed, put an insulation sleeve on the outside of the cylindrical shell, install the lamp holder with a quartz lamp in the cylindrical shell, and support the lamp frame installed on the foundation at both ends of the lamp holder. Install a ceramic insulation piece on the outer end of the cylindrical shell, install a displacement sensor on the ceramic insulation piece, install an exciter on the outer periphery of the outer end of the cylindrical shell, connect the moving end of the exciter to the cylindrical shell through a force sensor, electrically connect the exciter to the power amplifier, electrically connect the quartz lamp, the power amplifier, the displacement sensor to the computer, and start the quartz lamp and the exciter through the computer for testing.

[0017] Compared with the prior art, the present invention has the following beneficial effects: simple structure, reasonable design, can measure the dynamic parameters of the test piece under high temperature environment, strong versatility, can use the burner to carry out dynamic heating test, can also use the quartz lamp array to carry out static heating test, and can also carry out measurement in multiple directions of horizontal or vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the platform when conducting a quartz lamp thermal vibration test;

[0020] Figure 2 This is a schematic diagram of the structure of a vertically installed quartz lamp;

[0021] Figure 3 This is a schematic diagram of the structure of the platform for conducting transverse combustion heating and thermal vibration tests;

[0022] Figure 4 This is a schematic diagram of the structure for conducting vertical combustion heating and thermal vibration tests on this platform.

[0023] In the figure: 1-steel frame; 101-flat plate; 102-vertical side plate; 103-through hole; 104-horizontal connecting seat; 105-longitudinal mounting bar hole; 106-groove; 2-flange seat; 3-insulating sleeve; 4-displacement sensor; 5-ceramic insulating member; 6-cylindrical shell; 7-lamp holder; 8-lamp holder; 9-connecting buckle; 10-support; 11-force sensor; 12-exciter; 13-power amplifier; 14-computer; 15-burner; 16-conical sleeve. 104, 105 is opened on the horizontal connecting seat. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1-4 As shown, a cylindrical shell thermal vibration test platform includes a steel frame 1, a combustion component, a lamp array component, and a flange seat 2. The steel frame is made of high-temperature resistant metal material;

[0026] The steel frame includes a flat plate 101 and two vertical side plates 102. The left and right ends of the lower side of the flat plate are connected to the upper ends of the vertical side plates. Through holes 103 are opened in the middle of the flat plate and the vertical side plates. The inner end of the cylindrical shell is installed at one of the through holes on the steel frame through a flange seat. The cylindrical shell 6 is coaxial with the through hole at its installation position.

[0027] The combustion assembly includes a burner 15 and a conical sleeve 16. The small end of the conical sleeve is connected to the output end of the burner. The outer periphery of the large end of the conical sleeve is provided with a flange portion for connecting a flat plate or a vertical side plate. The inner diameter of the large end of the conical sleeve is not greater than the diameter of the through hole. The conical sleeve is used to prevent the flame of the burner from contacting the air. The conical key is used to directly introduce the flame into the cylindrical shell so that it can be fully burned. The flame length is relatively long. Directly spraying the cylindrical shell is likely to damage it. The conical sleeve can solve this problem.

[0028] The lamp array assembly includes a lamp holder 7, a lamp frame 8, a support 10, an insulation sleeve 3, an exciter 12, and a power amplifier 13. The insulation sleeve is arranged outside the cylindrical shell. The insulation sleeve is mainly used to insulate the heat generated by the quartz lamp array and block high temperature to avoid being injured. The insulation can keep the temperature basically constant at a certain stable value, and it is not easy to dissipate heat and it is easier to heat to the required temperature. There is a gap between the insulation sleeve and the cylindrical shell to avoid resonance with the cylindrical shell during the test and affect the test measurement. When the cylindrical shell is installed on the vertical side plate, the insulation sleeve is set on the support. When the cylindrical shell is installed on the flat plate, the insulation sleeve is set on the flange seat. A number of quartz lamps are evenly distributed on the circumference of the outer side of the lamp holder. The lamp holder passes through the cylindrical shell. There is a gap between the lamp holder and the cylindrical shell. Both ends of the lamp holder are installed There is a lamp stand, a ceramic insulation member 5 is installed on the top of the outer end of the cylindrical shell, a displacement sensor 4 is installed on the ceramic insulation member, the ceramic insulation member and the cylindrical shell are threadedly connected, which can accurately transmit vibration and provide heat insulation at the same time, the exciter is installed on the outer periphery of the outer end of the cylindrical shell, the active end of the exciter is connected to the cylindrical shell through a force sensor 11, the force sensor is mainly used to measure the restoring force generated when the cylindrical shell is bent and deformed, the exciter is electrically connected to the power amplifier, the quartz lamp, the power amplifier, the displacement sensor, and the force sensor are all electrically connected to the computer 14, the temperature of the quartz lamp is adjustable and controllable, the heating temperature can be as high as 1000°C or more, the cylindrical shell can be statically heated, and a certain gap is maintained with the cylindrical shell, which will not cause resonance and affect the measurement.

[0029] In this embodiment, the displacement sensor is an eddy current displacement sensor.

[0030] In this embodiment, 14 quartz lamp tubes arranged along the axial direction of the lamp holder are evenly distributed on the circumference of the outer side surface of the lamp holder, and the lamp holder is coaxial with the cylindrical shell.

[0031] In this embodiment, an annular groove for accommodating the end of the cylindrical shell is formed on the flange seat, and radial screw holes communicating with the annular groove are formed on the outer periphery of the flange seat, and locking pins for locking the cylindrical shell are installed in the radial screw holes.

[0032] In this embodiment, a horizontal connection seat 104 is installed on the outer side surface of the lower end of the vertical side plate, and a longitudinal installation strip hole 105 is opened on the horizontal connection seat.

[0033] In this embodiment, a plurality of grooves 106 are provided at intervals along the longitudinal direction on the lower side of the vertical side plate. The grooves can be fixed with protrusions or latches of the foundation, and the grooves are designed to be U-shaped for greater stability.

[0034] In this embodiment, the thermal insulation sleeve is composed of two thermal insulation sleeve base bodies, and the ends of the two thermal insulation sleeve base bodies are connected via a connecting buckle 9.

[0035] A method for using a cylindrical shell thermal vibration test platform:

[0036] Combustion heating thermal vibration test: install the steel frame on the foundation, install the cylindrical shell on the outer side of a through hole on the steel frame through the flange seat as needed, install the burner in the steel frame, connect the large end of the conical sleeve to the inner side of the through hole on the steel frame where the cylindrical shell is installed, connect the small end of the conical sleeve to the output end of the burner, and start the burner to heat the cylindrical shell;

[0037] Quartz lamp thermal vibration test: install the steel frame on the foundation, install the cylindrical shell on the outer side of a through hole on the steel frame through the flange seat as needed, put an insulation sleeve on the outside of the cylindrical shell, install the lamp holder with a quartz lamp in the cylindrical shell, and support the lamp frame installed on the foundation at both ends of the lamp holder. Install a ceramic insulation piece on the outer end of the cylindrical shell, install a displacement sensor on the ceramic insulation piece, install an exciter on the outer periphery of the outer end of the cylindrical shell, connect the moving end of the exciter to the cylindrical shell through a force sensor, electrically connect the exciter to the power amplifier, electrically connect the quartz lamp, the power amplifier, the displacement sensor to the computer, and start the quartz lamp and the exciter through the computer for testing.

[0038] If this patent discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (such as connection using bolts or screws), or as: a non-detachable fixed connection (such as riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (such as one-piece manufacturing using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0039] In the description of this patent, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0040] The preferred embodiments listed above further illustrate the objectives, technical solutions and advantages of the present invention in detail. It should be understood that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cylindrical shell thermal vibration test platform, characterized in that: Including steel frame, combustion assembly, lamp array assembly, flange seat; The steel frame includes a flat plate and two vertical side plates. The left and right ends of the lower side of the flat plate are connected to the upper ends of the vertical side plates. Through holes are opened in the middle of the flat plate and the vertical side plates. The inner end of the cylindrical shell is installed at one of the through holes on the steel frame through a flange seat. The cylindrical shell is coaxial with the through hole at its installation position. The combustion assembly includes a burner and a conical sleeve, wherein the small end of the conical sleeve is connected to the output end of the burner, and the outer periphery of the large end of the conical sleeve is provided with a flange portion for connecting to a flat plate or a vertical side plate, and the inner diameter of the large end of the conical sleeve is not greater than the diameter of the through hole; The lamp array assembly includes a lamp holder, a lamp rack, a support, a heat insulation sleeve, an exciter, and a power amplifier. The heat insulation sleeve is arranged outside the cylindrical shell, and there is a gap between the heat insulation sleeve and the cylindrical shell. When the cylindrical shell is installed on the vertical side plate, the heat insulation sleeve is placed on the support, and when the cylindrical shell is installed on the flat plate, the heat insulation sleeve is placed on the flange seat. A number of quartz lamps are evenly distributed on the circumference of the outer side surface of the lamp holder. The lamp holder passes through the cylindrical shell, and there is a gap between the lamp holder and the cylindrical shell. Lamp racks are installed at both ends of the lamp holder. A ceramic heat insulation piece is installed on the top of the outer end of the cylindrical shell, and a displacement sensor is installed on the ceramic heat insulation piece. The exciter is installed on the outer circumference of the outer end of the cylindrical shell. The active end of the exciter is connected to the cylindrical shell via a force sensor. The exciter is electrically connected to the power amplifier. The quartz lamp, the power amplifier, the displacement sensor, and the force sensor are all electrically connected to the computer. The flange seat is provided with an annular groove for accommodating the end of the cylindrical shell, and the outer circumference of the flange seat is provided with radial screw holes connected to the annular groove, and locking pins for locking the cylindrical shell are installed in the radial screw holes; A horizontal connection seat is installed on the outer side surface of the lower end of the vertical side plate, and a longitudinal installation strip hole is opened on the horizontal connection seat; A plurality of grooves are arranged at intervals along the longitudinal direction on the lower side surface of the vertical side plate.

2. The cylindrical shell thermal vibration test platform according to claim 1, characterized in that: The displacement sensor is an eddy current displacement sensor.

3. The cylindrical shell thermal vibration test platform according to claim 1, characterized in that: 14 quartz lamp tubes arranged along the axial direction of the lamp holder are evenly distributed on the circumference of the outer side surface of the lamp holder, and the lamp holder is coaxial with the cylindrical shell.

4. The cylindrical shell thermal vibration test platform according to claim 1, characterized in that: The heat insulation sleeve is composed of two heat insulation sleeve base bodies, and the ends of the two heat insulation sleeve base bodies are connected via connecting buckles.

5. A method for using the cylindrical shell thermal vibration test platform according to claim 1, characterized in that: Combustion heating thermal vibration test: install the steel frame on the foundation, install the cylindrical shell on the outer side of a through hole on the steel frame through the flange seat as needed, install the burner in the steel frame, connect the large end of the conical sleeve to the inner side of the through hole on the steel frame where the cylindrical shell is installed, connect the small end of the conical sleeve to the output end of the burner, and start the burner to heat the cylindrical shell; Quartz lamp thermal vibration test: install the steel frame on the foundation, install the cylindrical shell on the outer side of a through hole on the steel frame through the flange seat as needed, put an insulation sleeve on the outside of the cylindrical shell, install the lamp holder with a quartz lamp in the cylindrical shell, and support the lamp frame installed on the foundation at both ends of the lamp holder. Install a ceramic insulation piece on the outer end of the cylindrical shell, install a displacement sensor on the ceramic insulation piece, install an exciter on the outer periphery of the outer end of the cylindrical shell, connect the moving end of the exciter to the cylindrical shell through a force sensor, electrically connect the exciter to the power amplifier, electrically connect the quartz lamp, the power amplifier, the displacement sensor to the computer, and start the quartz lamp and the exciter through the computer for testing.

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