A test apparatus for wear resistance of alloy tubes in engine combustion chambers

Abstract

The present invention discloses an engine combustion chamber alloy tube wear-resistant test device, comprising: a test bench, which is used for device fixing and support and has a guide rod on one side; an in-tube grinding test assembly, which is used for performing wear test on the inner wall of the engine combustion chamber alloy tube sample; an external tooling clamping assembly, which is used for clamping and fixing the alloy tube sample; an atmosphere temperature control chamber, which is used for heating, temperature control and corrosion environment simulation of the alloy tube sample. In the present invention, by setting a new in-tube grinding test assembly and an external tooling clamping assembly structure, during the peripheral clamping tooling process of the external tooling clamping assembly, the overall rotation movement of the in-tube grinding test assembly allows the grinding strip to elastically contact with the tube wall for grinding test, and the inclination angle of the grinding strip can be adjusted to achieve the adjustment and change of the grinding contact area. The innovative sample clamping mechanism ensures that the sample is firmly fixed in a high temperature and high pressure environment, prevents displacement or loosening, and improves the stability of the experiment.

Description

Technical Field

[0001] The invention relates to the technical field of alloy tube wear resistance testing, in particular to a wear resistance testing device for alloy tubes in engine combustion chambers. Background Art

[0002] The engine combustion chamber is one of the key components of a rocket engine. Its main function is to contain and support the combustion process and generate thrust to propel the rocket forward. During operation, the internal environment of the combustion chamber is extremely harsh and needs to withstand high-temperature, high-pressure, and high-speed gas flows. These gas flows contain high-temperature and high-speed combustion products, which cause severe wear and corrosion to the inner wall of the alloy tube. In contrast, the outer wall of the combustion chamber has a lower degree of wear due to the protection of the cooling system.

[0003] The wear of the inner wall of the combustion chamber alloy tube is mainly caused by the following reasons:

[0004] High-temperature and high-pressure air flow scouring: The combustion chamber is subjected to extremely high temperature and pressure gas flow. The gas contains incompletely burned particles and high-temperature gases, which cause severe scouring and wear on the inner wall of the alloy tube.

[0005] Chemical corrosion: The high-temperature gases and combustion by-products produced during the combustion process may contain corrosive chemicals. These substances come into contact with the inner wall of the alloy tube, causing chemical corrosion and aggravating wear.

[0006] Thermal stress cycle: The temperature in the combustion chamber changes rapidly, causing the inner wall of the alloy tube to repeatedly expand and contract, generating thermal stress. This thermal cycle stress can also cause fatigue and wear of the material.

[0007] Existing wear test devices usually cannot fully simulate the harsh working environment in the combustion chamber, and it is difficult to accurately evaluate the wear resistance of alloy tube materials in actual work. In particular, when simulating high temperature, high pressure airflow and chemical corrosion environment, existing devices often ignore the uniform heating and multi-angle wear of the inner wall of the alloy tube, resulting in inaccurate and incomplete test results.

[0008] In response to these problems, the present invention proposes an improved engine combustion chamber alloy tube wear resistance test experimental device, through which the harsh working conditions in the combustion chamber can be better simulated, and uniform heating and multi-angle wear testing of the samples can be achieved, thereby improving the accuracy and reliability of the wear resistance test. The purpose is to solve the problems and improve the practical value through this technology. Summary of the invention

[0009] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0010] To this end, the technical solution adopted by the present invention is: a wear-resistant experimental device for alloy tubes in engine combustion chambers, comprising: a test bench, which is used to fix and support the device and has a guide rod on one side; an inner tube grinding test assembly, which is used to perform wear tests on the inner wall of the engine combustion chamber alloy tube sample; an external tooling clamping assembly, which is used to clamp and fix the alloy tube sample; an atmosphere temperature control chamber, which is used to heat, control the temperature and simulate the corrosion environment of the alloy tube sample, and has a guide block on one side for aligning and connecting with the sleeve guide rod.

[0011] In a preferred example, the present invention can be further configured as follows: the in-tube grinding test assembly includes: a driving seat, which is provided with a motor inside, used to drive a number of grinding strips to perform orbital motion; a fixed spoke seat and a movable spoke seat and an axis fixed to the bottom surface of the fixed spoke seat, used to drive the grinding strips to grind the inner wall of the alloy tube; a hydraulic pipeline driving rod, used to control the relative position of the movable spoke seat and the fixed spoke seat to adjust the inclination angle of the grinding strips.

[0012] In a preferred example, the present invention can be further configured as follows: the external tooling clamping assembly includes: a movable disc seat, a fixed disc seat, a fixed seat and a chuck rod arranged in sequence, and the movable disc seat is driven to rotate relative to the surface of the fixed disc seat by a hand-turned disc located on the inner side of the test bench seat; the first guide groove and the second guide groove are respectively arranged on the surfaces of the movable disc seat and the fixed disc seat, for guiding the radial movement of the chuck rod; the chuck rod has a chuck fixedly installed on the top end, which is used to clamp and fix the outer periphery of the alloy tube sample.

[0013] In a preferred example, the present invention can be further configured as follows: the atmosphere temperature control chamber is provided with: an eddy current coil for electrically heating the sample tube; and a spray pipe group for spraying acid mist or ozone gas to simulate an acidic or strongly oxidizing environment.

[0014] In a preferred example, the present invention can be further configured as follows: a first driving tooth and a second driving tooth are provided inside the driving seat, the second driving tooth is transmission-connected to the output end of the driving motor, the driving rod is fixedly mounted on the surface of the first driving tooth and the output end is connected to a connecting ear ring fixed to the bottom surface of the moving spoke seat, a liquid supply ring is installed on the relative inner sides of the first driving tooth and the second driving tooth for rotation, and the liquid supply ring is fixed on the inner side of the test bench for connecting a hydraulic pump to control the extension and retraction of the driving rod.

[0015] In a preferred example, the present invention can be further configured as follows: a sliding bar that passes through the movable spoke seat is fixedly installed on the inner side of the first driving tooth, the movable spoke seat is slidably sleeved on the surface of the sliding bar, and the outer periphery of the movable spoke seat is provided with a plurality of ball heads that are connected one-to-one with the grinding strips.

[0016] In a preferred example, the present invention can be further configured as follows: a plurality of axle ear seats are rotatably mounted on the surface of the fixed spoke seat, a connecting piece group is movably connected to the bottom surface of the axle ear seat, the connecting piece group includes a first scissors-fork link of a lifting slip ring fixed to the top of the slide bar, a rotating ear movably connected to the bottom end of the axle ear seat, and a second scissors-fork link used to connect the first scissors-fork link of the lifting slip ring and the rotating ear, the deflection direction of the axle ear seat and the fixed spoke seat is horizontal, and the second scissors-fork link is numerically axially rotatably connected to the surface of the fixed spoke seat and the first scissors-fork link of the lifting slip ring.

[0017] In a preferred example, the present invention can be further configured as follows: the grinding strip includes a fixed support strip and an arched frosted bow piece fixed on the surface of the fixed support strip, one end of the fixed support strip is provided with a ball head groove connected to the ball head on the surface of the moving spoke seat and a deflection pin rotatably connected to the surface of the shaft ear seat, and the frosted bow piece includes an elastic arch strip and a sanding belt adhered to its surface.

[0018] The beneficial effects achieved by the present invention are:

[0019] 1. In the present invention, a novel in-tube grinding test component and an external tooling clamping component structure are provided. During the peripheral clamping process of the external tooling clamping component, the overall rotational movement of the in-tube grinding test component allows the grinding bar to elastically contact the tube wall for grinding testing, and the inclination angle of the grinding bar can be adjusted to achieve the adjustment of the grinding contact area. The innovative sample clamping mechanism ensures that the sample is firmly fixed in a high temperature and high pressure environment to prevent displacement or loosening, thereby improving the stability of the experiment.

[0020] 2. In the present invention, the eddy current coil in the atmosphere temperature control chamber ensures that the sample tube is evenly heated during the entire experiment, accurately simulating the high temperature environment in the engine combustion chamber. At the same time, the angle of the grinding strip can be flexibly adjusted, and the precise control of the rotating mechanism can adjust the fitting area and grinding intensity according to different test requirements, ensuring the reliability and repeatability of the experimental results. This design significantly improves the performance of existing devices in terms of stable clamping and precise control.

[0021] 3. In the present invention, an independent atmosphere temperature control chamber structure is equipped, and an external tooling clamping assembly is used to connect the acid liquid pumping structure or the ozone generator structure to perform acid mist spraying and ozone gas spraying. An acidic or strong oxidizing environment can be constructed on the surface of the sample tube to accurately simulate the chemical corrosion environment in the combustion chamber. Through the coordinated work of the eddy current coil and the spray system, real-time temperature and corrosion environment regulation can be achieved, making the corrosion test more efficient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2This is a schematic diagram of the structure of an external tooling clamping assembly according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of an in-pipe grinding test assembly according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of an atmosphere temperature control chamber according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the surface structure of a shaft rod according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation structure of the shaft rod and the connecting piece group according to an embodiment of the present invention;

[0028] Figure 7 The figure is a schematic diagram of the structure of a grinding strip according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] 100. test bench; 110. guide rod;

[0031] 200, in-pipe grinding test assembly; 210, driving seat; 220, grinding strip; 230, fixed spoke seat; 240, moving spoke seat; 250, shaft rod; 260, connecting piece group; 211, first driving tooth; 212, second driving tooth; 213, liquid supply fixed ring; 214, driving rod; 215, sliding strip; 221, fixed support strip; 222, ball head groove; 223, deflection pin; 224, grinding bow piece; 231, shaft ear seat; 261, lifting slip ring; 241, connecting ear ring; 261, first scissor-fork connecting rod; 262, second scissor-fork connecting rod; 263, rotating ear;

[0032] 300, external tooling clamping assembly; 310, moving disc seat; 320, fixed disc seat; 330, fixed seat; 340, chuck rod; 350, hand turntable; 311, first guide groove; 312, coupling sleeve; 313, transmission gear seat; 321, second guide groove; 322, damping plate; 341, chuck;

[0033] 400, atmosphere temperature control chamber; 410, guide block; 420, eddy current coil; 430, spray pipe group. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0035] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0036] A wear-resistant test device for alloy tubes in an engine combustion chamber provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0037] Combination Figure 1-7 As shown, the present invention provides an engine combustion chamber alloy tube wear-resistant experimental device, comprising: a test bench 100, which is used for device fixing and support and has a guide rod 110 on one side; an in-tube grinding test assembly 200, which is used to perform wear test on the inner wall of the engine combustion chamber alloy tube sample; an external tooling clamping assembly 300, which is used to clamp and fix the alloy tube sample; an atmosphere temperature control chamber 400, which is used to heat and control the temperature of the alloy tube sample and simulate the corrosion environment, and has a guide block 410 on one side for aligning and connecting with the sleeve guide rod 110.

[0038] In this embodiment, the in-tube grinding test assembly 200 includes: a driving seat 210, which is provided with a motor inside, used to drive a number of grinding strips 220 to perform orbital motion; a fixed spoke seat 230 and a movable spoke seat 240 and an axis rod 250 fixed to the bottom surface of the fixed spoke seat 230, which are used to drive the grinding strips 220 to grind the inner wall of the alloy tube; a hydraulic pipeline connects the driving rod 214, which is used to control the relative position of the movable spoke seat 240 and the fixed spoke seat 230 to adjust the inclination angle of the grinding strips 220.

[0039] Specifically, the grinding strip is driven to revolve through the motor inside the driving seat, and the design of the fixed spoke seat and the movable spoke seat enables the grinding strip to adjust the inclination angle, simulate multi-angle wear, and adjust the contact area and contact pressure.

[0040] In this embodiment, the external tooling clamping assembly 300 includes: a movable disc seat 310, a fixed disc seat 320, a fixed seat 330 and a chuck rod 340 arranged in sequence, and the movable disc seat 310 is driven to rotate relatively on the surface of the fixed disc seat 320 by a hand turntable 350 located on the inner side of the test bench 100; a first guide groove 311 and a second guide groove 321 are respectively provided on the surfaces of the movable disc seat 310 and the fixed disc seat 320, for guiding the radial movement of the chuck rod 340;

[0041] The chuck rod 340 has a chuck 341 fixedly mounted on the top end thereof for clamping and fixing the outer circumference of the alloy tube sample.

[0042] Specifically, the design of the moving plate seat and the fixed plate seat makes the installation and removal of the sample tube more convenient. The chuck rod is guided by the guide groove to achieve a stable clamping of the sample, preventing the sample from shifting or loosening during the test, thereby improving the stability and accuracy of the experiment.

[0043] In this embodiment, the atmosphere temperature control chamber 400 is provided with: an eddy current coil 420 for heating the sample tube by electricity; and a spray pipe group 430 for spraying acid mist or ozone gas to simulate an acidic or strongly oxidizing environment.

[0044] Specifically, the eddy current coil is used to heat the sample tube to ensure that it is evenly heated during the test; the spray pipe group is used to simulate the acidic or strongly oxidizing environment and accurately reproduce the corrosive environment in the combustion chamber; the design of the guide block and guide rod ensures the fixation and alignment of the atmosphere temperature control chamber, ensuring the controllability and stability of the experimental conditions.

[0045] In this embodiment, a first driving tooth 211 and a second driving tooth 212 are provided inside the driving seat 210, and the second driving tooth 212 is transmission-connected to the output end of the driving motor. The driving rod 214 is fixedly installed on the surface of the first driving tooth 211 and the output end is connected to a connecting ear ring 241 fixed to the bottom surface of the moving spoke seat 240. A liquid supply ring 213 is installed on the relative inner side of the first driving tooth 211 and the second driving tooth 212 for rotation. The liquid supply ring 213 is fixed on the inner side of the test bench 100 and is used to connect a hydraulic pump to control the extension and retraction of the driving rod 214.

[0046] In this embodiment, a slide bar 215 penetrating the movable spoke seat 240 is fixedly installed on the inner side of the first driving tooth 211. The movable spoke seat 240 is slidably sleeved on the surface of the slide bar 215, and a plurality of ball heads corresponding to the grinding strips 220 are provided on the outer periphery of the movable spoke seat 240.

[0047] In this embodiment, a plurality of axle ear seats 231 are rotatably mounted on the surface of the fixed spoke seat 230, and a connecting piece group 260 is movably connected to the bottom surface of the axle ear seat 231, and the connecting piece group 260 includes a first scissors-fork link 261 of a lifting slip ring fixed to the top of the slide bar 215, a rotating ear 263 movably connected to the bottom end of the axle ear seat 231, and a second scissors-fork link 262 used to connect the first scissors-fork link 261 of the lifting slip ring and the rotating ear 263, the deflection direction of the axle ear seat 231 and the fixed spoke seat 230 is horizontal, and the second scissors-fork link 262 is axially rotatably connected to the surface of the fixed spoke seat 230 and the first scissors-fork link 261 of the lifting slip ring.

[0048] Furthermore, the grinding strip 220 includes a fixed support strip 221 and an arched frosted bow piece 224 fixed to the surface of the fixed support strip 221. One end of the fixed support strip 221 is provided with a ball head groove 222 connected to the ball head on the surface of the moving spoke seat 240 and a deflection pin 223 rotatably connected to the surface of the shaft ear seat 231. The frosted bow piece 224 includes an elastic arch strip and a sanding belt adhered to its surface.

[0049] Specifically, the design of multiple grinding strips can perform multi-point wear tests at the same time, significantly improving the test efficiency and comprehensiveness of the data, and providing more reliable data support for the wear resistance evaluation of alloy tube materials. The arched structure can improve the fit with the inner side of the sample tube during deflection adjustment, and perform precise adjustment and control of the grinding area.

[0050] The working principle and use process of the present invention:

[0051] In the wear-resistant experiment of the alloy tube of the engine combustion chamber, a sample of the alloy tube of the engine combustion chamber of a suitable length is cut, sleeved on the surface of the inner tube grinding test assembly 200 and the bottom end is fixed on the surface of the outer tooling clamping assembly 300, and the hand turntable 350 is synchronously driven to drive the relative rotation of the movable disc seat 310 on the surface of the fixed disc seat 320, so that the first guide groove 311 and the second guide groove 321 guide the radial movement of the chuck rod 340 to clamp and fix the periphery of the sample tube, and the atmosphere temperature control chamber 400 is connected to the inner tube grinding test assembly 200 and the periphery of the sample tube and placed on the surface of the outer tooling clamping assembly 300 through the sleeve alignment of the guide block 410 and the guide rod 110, and the atmosphere temperature control chamber 400 is covered and connected to the inner tube grinding test assembly 200 and the periphery of the sample tube and placed on the surface of the outer tooling clamping assembly 300, and the eddy current coil 420 inside the atmosphere temperature control chamber 400 is energized to generate eddy currents to heat and control the temperature of the metal sample tube, and the acid mist spray or ozone gas spray can be carried out through the spray pipe group 430 to construct an acidic or strong oxidation environment, so as to realize the oxidation corrosion detection of the sample tube;

[0052] During the operation of the in-tube grinding test assembly 200, the second driving tooth 212 is driven to rotate by the internal motor of the driving seat 210. During the synchronous movement of the second driving tooth 212, the fixed spoke seat 230 and the movable spoke seat 240 on the surface of the entire shaft 250 can be controlled to drive the grinding strips 220 to move synchronously, so that each grinding strip 220 can perform orbital movement to fit and grind the inner wall of the alloy tube; during the grinding operation, the driving rod 214 is controlled by statically connecting the hydraulic pipeline with the liquid supply fixed ring 213, and the connecting ear ring 241 and the movable spoke seat 240 slide and rise and fall on the surface of the slide bar 215 during the telescopic movement of the driving rod 214, that is, Controlling the distance between the movable spoke seat 240 and the shaft ear seat 231 to link the fixed spoke seat 230 to make a deflection movement can realize the deflection movement of the grinding strip 220, change the inclination angle of the grinding strip 220, and reduce or increase the contact area between the grinding strip 220 and the inner wall of the alloy tube. When the arched frosted bow piece 224 is upright and parallel to the shaft rod 250, the contact area with the wear-resistant inner wall of the alloy tube is the smallest, and the contact area with the inner wall of the alloy tube gradually increases when the frosted bow piece 224 is tilted; synchronously, during the deflection movement of the shaft ear seat 231, the first scissor-type connecting rod 261, which is the surface of the lifting slip ring connected by the connecting piece group 260, slides freely on the surface of the slide bar 215.

[0053] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An engine combustion chamber alloy tube wear test device, characterized in that: include: A test bench (100) is used for fixing and supporting a device and has a guide rod (110) on one side; An in-tube grinding test assembly (200) is used to perform abrasion testing on the inner wall of an alloy tube sample in an engine combustion chamber; An external tooling clamping assembly (300) used to clamp and fix the alloy tube sample; An atmosphere temperature control chamber (400) is used to perform heating and temperature control on the alloy tube sample and to simulate a corrosive environment, and one side of the chamber is provided with a guide block (410) for aligning and connecting with the sleeve guide rod (110); The in-pipe grinding test assembly (200) comprises: A driving seat (210) having a motor disposed therein for driving the grinding strips (220) to perform a revolution motion; The fixed spoke seat (230), the movable spoke seat (240) and the shaft (250) fixed to the bottom surface of the fixed spoke seat (230) are used to drive the grinding strip (220) to grind the inner wall of the alloy tube; The hydraulic pipeline driving rod (214) is used to control the relative position of the movable spoke seat (240) and the fixed spoke seat (230) to adjust the inclination angle of the grinding strip (220).

2. The wear-resistant test device for alloy tubes in engine combustion chambers according to claim 1, characterized in that: The external tooling clamping assembly (300) comprises: The movable disc seat (310), the fixed disc seat (320), the fixed seat (330) and the chuck rod (340) are arranged in sequence, and the movable disc seat (310) is driven to rotate relatively on the surface of the fixed disc seat (320) by a hand turntable (350) located inside the test bench seat (100); The first guide groove (311) and the second guide groove (321) are respectively arranged on the surfaces of the movable disc seat (310) and the fixed disc seat (320), and are used to guide the radial movement of the chuck rod (340); A chuck rod (340) has a chuck (341) fixedly mounted on the top end thereof and is used to clamp and fix the outer circumference of the alloy tube sample.

3. The wear-resistant test device for alloy tubes in engine combustion chambers according to claim 1, characterized in that: The atmosphere temperature control chamber (400) is provided with: An eddy current coil (420) is used to heat the sample tube by energizing it; The spray pipe group (430) is used for spraying acid mist or ozone gas to simulate an acidic or strongly oxidizing environment.

4. The wear-resistant test device for alloy tubes in engine combustion chambers according to claim 1, characterized in that: The drive seat (210) is provided with a first drive tooth (211) and a second drive tooth (212) in a transmission connection with the output end of the drive motor; the drive rod (214) is fixedly mounted on the surface of the first drive tooth (211) and the output end is connected to a connecting ear ring (241) fixed to the bottom surface of the moving spoke seat (240); a liquid supply fixed ring (213) is rotatably mounted on the inner side of the first drive tooth (211) and the second drive tooth (212); the liquid supply fixed ring (213) is fixed to the inner side of the test bench (100) and is used to connect a hydraulic pump to control the extension and retraction of the drive rod (214).

5. The wear-resistant test device for alloy tubes in engine combustion chambers according to claim 4, characterized in that: A slide bar (215) penetrating the movable spoke seat (240) is fixedly mounted on the inner side of the first driving tooth (211); the movable spoke seat (240) is slidably sleeved on the surface of the slide bar (215); and a plurality of ball heads corresponding to the grinding bars (220) are provided on the outer periphery of the movable spoke seat (240).

6. The wear-resistant test device for alloy tubes in engine combustion chambers according to claim 1, characterized in that: A plurality of shaft ear seats (231) are rotatably mounted on the surface of the fixed spoke seat (230); a connecting piece group (260) is movably connected to the bottom surface of the shaft ear seat (231); the connecting piece group (260) comprises a first scissor-type link (261) of a lifting slip ring fixed to the top end of the slide bar (215), a rotating ear (263) movably connected to the bottom end of the shaft ear seat (231), and a second scissor-type link (262) used for connecting the first scissor-type link (261) of the lifting slip ring and the rotating ear (263); the deflection direction of the shaft ear seat (231) and the fixed spoke seat (230) is horizontal; and the second scissor-type link (262) is rotatably connected to the surface of the fixed spoke seat (230) and the first scissor-type link (261) of the lifting slip ring.

7. The wear-resistant test device for alloy tubes in engine combustion chambers according to claim 1, characterized in that: The grinding strip (220) comprises a fixed support strip (221) and an arched grinding arch piece (224) fixed to the surface of the fixed support strip (221); one end of the fixed support strip (221) is provided with a ball head groove (222) connected to the ball head on the surface of the moving spoke seat (240) and a deflection pin (223) rotatably connected to the surface of the shaft ear seat (231); the grinding arch piece (224) comprises an elastic arch strip and a sanding belt adhered to the surface thereof.

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