CN112444459A - Test equipment and method for stress relaxation test of engine wave spring - Google Patents
Test equipment and method for stress relaxation test of engine wave spring Download PDFInfo
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- CN112444459A CN112444459A CN202011284194.4A CN202011284194A CN112444459A CN 112444459 A CN112444459 A CN 112444459A CN 202011284194 A CN202011284194 A CN 202011284194A CN 112444459 A CN112444459 A CN 112444459A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
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Abstract
The invention relates to the field of stress relaxation tests of wave springs of aero-engines, and discloses test equipment and a method for the stress relaxation tests of the wave springs of the engines, wherein the test equipment comprises a pressure loading unit, a heating temperature control unit, a pressure measurement unit and a display recording unit; the pressure loading unit is used for loading the pressure to be born during the test on the part to be tested; the heating temperature control unit is used for simulating an alternating temperature environment in which a part to be tested works; the pressure measurement unit is used for measuring the stress relaxation parameters of the part to be measured in real time; the display recording unit is used for displaying the test data in real time and is in communication connection with the pressure measuring unit and the heating temperature control unit. The invention solves the problem that the stress relaxation test result of the existing test equipment and method can not truly reflect the stress relaxation performance of the wave spring part when the engine works because the working environment of the wave spring of the aero-engine can not be accurately simulated.
Description
Technical Field
The invention relates to the field of stress relaxation tests of wave springs of aero-engines, in particular to a test device and a method for stress relaxation tests of wave springs of engines.
Background
The wave spring is a profile and is wavy, a plurality of sine wave and axial stressed elastic elements are uniformly distributed in the circumferential direction, the deformation of the material is larger in comparison with the traditional spring under the condition of unit volume, about 50% of installation space can be saved in comparison with a cylindrical spring under the same load condition, and the actual working effects of buffering, vibration reduction, compensation, energy storage and the like are far superior to those of the common spring. In an aircraft engine, a wave spring is often used to save space. After the wave spring is assembled on an engine, the wave spring needs to bear compressive stress for a long time, and the engine is influenced by alternating temperature when working, so that stress relaxation is easy to occur, and the overall performance and reliability of the engine are further influenced.
Stress relaxation is a phenomenon in which the elastic properties of an elastic element decrease over time under constant strain conditions and is a direct cause of many elastic element failures. The national standard GB/T10120 metal stress relaxation test method stipulates a stress relaxation test method of a metal material, but the standard stipulations adopt a sample to test, the difference between the sample and an actual part is large, the test is carried out under the condition of constant temperature, and the working environment of a wave spring of an aero-engine cannot be accurately simulated.
In the actual test process, still rely on manual timing and record data when measuring among the existing test equipment mostly, partial test still need dismantle the sample and measure, and degree of automation is low, and the error is great, measures complicacy and unstablely to can only go on under the condition of constant temperature. In practice, the structural form of the elastic element directly affects the stress relaxation performance, and the alternating ambient temperature also has a very large influence on the stress relaxation performance. The stress relaxation performance of the wave spring part when the engine works cannot be truly reflected by measuring according to the standard.
Disclosure of Invention
Based on the technical problems, the invention provides test equipment and a test method for a stress relaxation test of a wave spring of an engine, and solves the problem that the stress relaxation test result of the existing test equipment and the existing test method cannot truly reflect the stress relaxation performance of wave spring parts when the engine works because the working environment of the wave spring of the aircraft engine cannot be accurately simulated.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a test device for a stress relaxation test of a wave spring of an engine comprises a pressure loading unit, a heating temperature control unit, a pressure measuring unit and a display recording unit; the pressure loading unit is used for loading the pressure to be born during the test on the part to be tested; the heating temperature control unit is used for simulating an alternating temperature environment in which a part to be tested works; the pressure measurement unit is used for measuring the stress relaxation parameters of the part to be measured in real time; the display recording unit is used for displaying the test data in real time and is in communication connection with the pressure measuring unit and the heating temperature control unit.
As a preferred mode, the pressure loading unit comprises a bottom plate, a pressure plate and a stud; at least two studs are vertically fixed on the bottom plate, through holes in clearance fit with the studs are formed in the pressing plate, and the pressing plate is sleeved on the studs; the periphery of the stud is provided with external threads, and the stud is sleeved with a nut used for setting the pressure of the pressing plate.
As a preferable mode, the bottom plate is further provided with a guide post parallel to the stud, the guide post is of an optical axis structure, and the guide post penetrates through the pressing plate to be in clearance fit with a through hole formed in the pressing plate.
As a preferable mode, the pressure measuring unit includes a pressure sensor and a pressure measuring instrument; the pressure sensor is fixed on the bottom plate, and the pressure measuring instrument is connected with the pressure sensor through a sensor lead.
As a preferred mode, the heating temperature control unit comprises a test box and an intelligent temperature control instrument; the intelligent temperature control instrument is arranged outside the test box and is electrically connected with the heating element and the temperature measuring element in the test box through cables.
As a preferred mode, the intelligent temperature control instrument adopts a PID temperature control instrument.
Preferably, a circulating air blower is further provided in the test chamber.
In addition, the invention also discloses a test method for the stress relaxation test of the wave spring of the engine, which is applied to the test equipment for the stress relaxation test of the wave spring of the engine and specifically comprises the following steps:
s1, preparing a part to be tested, and obtaining a working pressure value born by the part to be tested under a working assembly condition;
s2, completing the installation and debugging of the part to be tested and the test equipment based on the working pressure value;
s3, after the intelligent temperature control instrument inputs the alternating temperature curve, starting the heating temperature control unit to start the test;
s4, collecting stress relaxation test data of the part to be tested under the working pressure value and alternating temperature environment by using a pressure measurement unit;
and S5, processing the collected test data by using the display recording unit to obtain a real-time change curve of the stress relaxation test data of the part to be tested.
As a preferable mode, the step S1 of obtaining the working pressure value that the part to be tested bears under the working assembly condition includes:
s101, obtaining a working height value of a part to be measured under a working assembly condition;
s102, testing on a spring pressure testing machine to obtain a working pressure value of the part to be tested under the working height value.
As a preferable mode, the step S2 of completing the installation and debugging of the to-be-tested part and the testing equipment based on the working pressure value specifically includes the following steps:
s201, selecting a pressure sensor with a corresponding measuring range according to the requirement of the working pressure value;
s202, connecting the pressure sensor with a pressure measuring instrument, and zeroing the pressure measuring instrument;
s203, the pressure measuring instrument and the intelligent temperature control instrument are in communication connection with a display recording unit, and the pressure measuring instrument and the intelligent temperature control instrument are ensured to be consistent with the values displayed on the display recording unit;
s204, fixedly mounting the pressure sensor and the stud on a bottom plate;
s205, placing the part to be measured on a pressure sensor, and slightly applying pressure to the part to be measured through a nut and a pressure plate to ensure that the part to be measured cannot fall off;
s206, the assembled pressure loading unit is placed in a test box, a nut is screwed to adjust the pressure of the pressure plate on the part to be measured, and the pressure measuring instrument stops when reaching the working pressure value;
and S207, closing the door of the test box.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention provides equipment and a method for performing a stress relaxation test on a wave spring for an engine at an alternating temperature, which can effectively simulate the alternating temperature environment of the wave spring when the wave spring works in the engine, and simultaneously, directly adopt wave spring parts to perform the test, thereby avoiding the problem that the stress relaxation performance of the parts cannot be accurately reflected by the test result due to the fact that the structure and the state of a sample are different from those of the parts.
(2) The adjustable heating temperature control unit is adopted, so that the alternating temperature environment of the wave spring in the working process of the engine can be effectively simulated, the test environment is closer to the use environment, and the reliability of the test result is higher.
(3) The invention has the advantages that the wave spring part to be tested is installed at one time until the test is finished, the unloading is not needed in the midway, the pressure sensor and the pressure measuring instrument of the pressure measuring unit monitor the stress change in real time and automatically upload the stress change to the display and recording unit to generate the stress relaxation curve, the whole test process is highly automatic, the factors influencing test data such as human errors and the like are reduced, the installation and the disassembly are convenient, the operation is simple, the accuracy and the stability of the test data are high, and the method can be widely applied to the measurement of the stress relaxation performance of various engine spring parts.
(4) The invention can be widely applied to the measurement of the stress relaxation performance of various engine spring parts. Through the implementation of the technical scheme of the invention, the stress relaxation curve of the spring part under the real use condition can be conveniently measured, and a technical basis is provided for the design and application of the spring part in an engine.
Drawings
The present application will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings, in which:
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic structural view of a heating temperature control unit.
Fig. 3 is a schematic structural diagram of the pressure measurement unit.
Fig. 4 is a schematic structural diagram of the pressure loading unit.
Fig. 5 is a top view of fig. 4.
FIG. 6 is a flow chart of a test method for stress relaxation testing.
The device comprises a heating temperature control unit 1, an intelligent temperature control instrument 101, a temperature measuring element 102, a test box 103, a pressure measuring unit 2, a pressure sensor 201, a pressure measuring instrument 202, a display recording unit 3, a pressure loading unit 4, a guide pillar 401, a stud 402, a nut 403, a pressing plate 404, a bottom plate 405 and a part 5 to be measured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Fig. 1 to 4 are schematic structural diagrams of a test device for a wave spring stress relaxation test of an engine according to some embodiments of the present application, and the test device for the wave spring stress relaxation test of the engine according to the present application will be described with reference to fig. 1 to 4. It should be noted that fig. 1-4 are merely exemplary and are not intended to limit the specific shape and configuration of the test apparatus used for the wave spring stress relaxation test of the engine.
Referring to fig. 1, in the present embodiment, a test apparatus for a stress relaxation test of a wave spring of an engine includes a pressure loading unit 4, a heating temperature control unit 1, a pressure measurement unit 2, and a display recording unit 3; the pressure loading unit 4 is used for loading the pressure to be born when the part 5 to be tested is tested; the heating temperature control unit 1 is used for simulating an alternating temperature environment in which the part to be measured 5 works; the pressure measuring unit 2 is used for measuring the stress relaxation parameters of the part 5 to be measured in real time; the display recording unit 3 is used for displaying test data in real time, and the display recording unit 3 is in communication connection with the pressure measuring unit 2 and the heating temperature control unit 1.
In this example, because the wave spring of the engine can bear a certain working pressure and be at a certain working environment temperature in the working environment, the working environment of the wave spring is simulated through the pressure loading unit 4 and the heating temperature control unit 1, so that the stress relaxation performance of the wave spring can be accurately reflected by the result of the stress relaxation test.
The pressure measuring unit 2 and the display recording unit 3 can monitor the stress change in real time, so that the whole test process is highly automated, factors influencing test data such as human errors are reduced, and the accuracy and the stability of the test data are improved.
Specifically, the display recording unit 3 is composed of a host computer and a data line, and the host computer is pre-loaded with analysis software. The stress and temperature data collected by the pressure measurement unit 2 are displayed and recorded, the temperature and stress change data are processed through software, and temperature-time and stress-time curves are drawn.
Referring to fig. 4 and 5, in some embodiments, the pressure loading unit 4 includes a base plate 405, a pressure plate 404, and a stud 402; at least two studs 402 are vertically fixed on the bottom plate 405, through holes in clearance fit with the studs 402 are formed in the pressing plate 404, and the pressing plate 404 is sleeved on the studs 402; the outer periphery of the stud 402 is provided with external threads, and the stud 402 is sleeved with a nut 403 for setting the pressure of the pressing plate 404.
In this embodiment, the part 5 to be measured is placed between the bottom plate 405 and the pressing plate 404, and the pressure of the part 5 to be measured is set by the locking action of the nut 403.
Preferably, the bottom plate 405 is further provided with a guide post 401 parallel to the stud 402, the guide post 401 is of an optical axis structure, and the guide post 401 passes through the pressing plate 404 to be in clearance fit with a through hole of the pressing plate 404. The guide post 401 can keep the pressing plate 404 parallel to the bottom plate 405 in the pressing process, so that the situation that the pressing plate 404 is deviated in the pressing process to cause uneven stress on the part 5 to be tested and influence on the accuracy of a test structure is avoided.
Referring to fig. 3, in some embodiments, the pressure measurement unit 2 includes a pressure sensor 201 and a pressure gauge 202; the pressure sensor 201 is fixed on the base plate 405, and the pressure measuring instrument 202 is connected to the pressure sensor 201 through a sensor lead.
In this embodiment, the pressure sensor 201 uses a foil-type strain gauge as a sensing element, so as to meet the requirement of normal use in a high-temperature environment. Stainless steel is adopted as an elastomer, a foil type strain gauge is attached to the stainless steel elastomer, the output sensitivity of the pressure sensor 201 is 2.0 +/-0.1 mV/V, the comprehensive precision is 0.1% FS, and the temperature range is 0-200 ℃. The pressure measuring instrument 202 is connected through a sensor lead, the pressure measuring instrument 202 converts an electric signal into a force value to be displayed in real time, and collected data are recorded on the display recording unit 3 through RS485 communication. The accuracy of the pressure gauge 202 was 0.05% FS with a collection frequency of 10 times/second.
At the moment, the data line of the display recording unit 3 is an RS485 communication-USB data serial port line, the USB interface can be conveniently connected with computers of various operating systems, the independent use of the data line is guaranteed through power supply of a USB bus, and the RS485 interface is connected with the RS485 communication interface of the instrument, so that instrument data can be stably obtained.
Referring to fig. 2, in some embodiments, the heating temperature control unit 1 includes a test chamber 103 and an intelligent temperature control meter 101; a heating element and a temperature measuring element 102 are arranged in the test box 103, and the intelligent temperature control instrument 101 is arranged outside the test box 103 and is electrically connected with the heating element and the temperature measuring element 102 in the test box 103 through cables.
Specifically, the heating element is one of a resistance heating element, an electromagnetic heating element or an infrared heating element.
Specifically, the temperature measuring element 102 is a pt100 platinum thermistor.
Preferably, the intelligent temperature control instrument 101 is a PID temperature control instrument. The intelligent temperature control instrument adopts a programmable high-precision PID temperature control instrument, can effectively simulate the cold and hot changes of the wave spring part under the working state of the engine through programming control, and has the instrument precision less than or equal to +/-1 ℃. One end of the temperature measuring element 102 is connected with the port of the intelligent temperature control instrument, and one end of the resistor is arranged near a test product to collect temperature signals and transmit the temperature signals to the intelligent temperature control instrument through a cable. The intelligent temperature control instrument has an RS485 communication function, and data acquired by the RS485 communication-USB data serial port line are uploaded to the display recording unit 3.
Therefore, under the cooperation of the heating element, the temperature measuring element 102 and the intelligent temperature control instrument 101, the working process of the heating temperature control unit 1 for simulating the waveform spring alternating temperature environment is as follows: by inputting the alternating temperature curve into the intelligent temperature control instrument 101, the intelligent temperature control instrument 101 controls the heating element to heat the temperature in the test chamber 103 to the temperature set by the alternating temperature curve according to the alternating temperature curve. Meanwhile, the temperature measuring element 102 can measure and feed back the temperature around the part 5 to be measured in real time to obtain more accurate temperature change, so that the intelligent temperature control instrument 101 can conveniently adjust the temperature, and the temperature adjustment is realized by controlling the heating element according to the set temperature and the measured temperature by the intelligent temperature control instrument 101.
Preferably, a circulating air blowing device is further arranged in the test box 103. The test box 103 adopts a circulating air blowing system to ensure the stability of the furnace temperature, the uniformity of the furnace temperature is less than or equal to +/-3 ℃, and the maximum temperature is 350 ℃.
Referring to fig. 6, on the basis of the test equipment, the application also discloses a test method for the stress relaxation test of the wave spring of the engine, which is applied to the test equipment for the stress relaxation test of the wave spring of the engine, and specifically comprises the following steps:
s1, preparing the part 5 to be tested, and obtaining the working pressure value born by the part 5 to be tested under the working assembly condition;
s2, completing the installation and debugging of the part 5 to be tested and the test equipment based on the working pressure value;
s3, after the intelligent temperature control instrument 101 inputs an alternating temperature curve, starting the heating temperature control unit 1 to start the test;
s4, collecting stress relaxation test data of the part 5 to be tested under the working pressure value and alternating temperature environment by using the pressure measurement unit 2;
and S5, processing the collected test data by using the display recording unit 3 to obtain a real-time change curve of the stress relaxation test data of the part 5 to be tested.
In some embodiments, the step S1 of obtaining the working pressure value that the part 5 to be tested is subjected to under the working assembly condition includes:
s101, obtaining a working height value of the part 5 to be measured under a working assembly condition;
s102, testing on a spring pressure testing machine to obtain a working pressure value of the part 5 to be tested under the working height value.
In some embodiments, the step S2 of completing the installation and debugging of the to-be-tested part 5 and the testing equipment based on the working pressure value specifically includes the following steps:
s201, selecting a pressure sensor 201 with a corresponding measuring range according to the requirement of the working pressure value;
s202, connecting the pressure sensor 201 with the pressure measuring instrument 202, and zeroing the pressure measuring instrument 202;
s203, the pressure measuring instrument 202 and the intelligent temperature control instrument 101 are in communication connection with the display recording unit 3, and the values displayed on the pressure measuring instrument 202, the intelligent temperature control instrument 101 and the display recording unit 3 are kept consistent;
s204, fixedly mounting the pressure sensor 201 and the stud 402 on a bottom plate 405;
s205, placing the part 5 to be measured on the pressure sensor 201, and slightly applying pressure to the part 5 to be measured through the nut 403 and the pressing plate 404 to ensure that the part 5 to be measured cannot fall off;
s206, the assembled pressure loading unit 4 is placed into the test box 103, the nut 403 is screwed to adjust the pressure of the pressing plate 404 on the part 5 to be measured, and the pressure measuring instrument 202 stops when reaching the working pressure value;
and S207, closing the door of the test box 103.
The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only used for clearly illustrating the verification process of the invention and are not used for limiting the patent protection scope of the invention, which is defined by the claims, and all the equivalent structural changes made by using the contents of the description and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A test apparatus for a wave spring stress relaxation test of an engine, comprising:
the pressure loading unit (4), the pressure loading unit (4) is used for loading the pressure to be born when the part (5) to be tested is tested;
the heating temperature control unit (1), the heating temperature control unit (1) is used for simulating an alternating temperature environment in which the part to be measured (5) works;
the pressure measuring unit (2), the pressure measuring unit (2) is used for measuring the stress relaxation parameters of the part (5) to be measured in real time;
the device comprises a display recording unit (3), wherein the display recording unit (3) is used for displaying test data in real time, and the display recording unit (3) is in communication connection with a pressure measurement unit (2) and a heating temperature control unit (1).
2. The test equipment for the stress relaxation test of the wave spring of the engine according to claim 1, wherein the pressure loading unit (4) comprises:
the bolt-type connector comprises a bottom plate (405), wherein at least two studs (402) are vertically fixed on the bottom plate (405);
the pressing plate (404), the pressing plate (404) is provided with a through hole which is in clearance fit with the stud (402), and the pressing plate (404) is sleeved on the stud (402);
the bolt (402), the cover is equipped with nut (403) that is used for setting clamp plate (404) pressure on the bolt (402).
3. The test apparatus for the stress relaxation test of the wave spring of the engine according to claim 2, wherein:
the bottom plate (405) is further provided with a guide post (401) parallel to the stud (402), the guide post (401) is of an optical axis structure, and the guide post (401) penetrates through the pressing plate (404) to be in clearance fit with a through hole formed in the pressing plate (404).
4. A test apparatus for a wave spring stress relaxation test of an engine according to claim 2, characterized in that said pressure measuring unit (2) comprises:
a pressure sensor (201), the pressure sensor (201) being fixed above a base plate (405);
a pressure measuring instrument (202), wherein the pressure measuring instrument (202) is connected with the pressure sensor (201) through a sensor lead.
5. The testing equipment for the stress relaxation test of the wave spring of the engine according to claim 4, characterized in that the heating temperature control unit (1) comprises:
the test box (103), the heating element and the temperature measuring element (102) are arranged in the test box (102);
the intelligent temperature control instrument (101) is arranged outside the test box (103) and is electrically connected with the heating element and the temperature measuring element (102) in the test box (103) through cables.
6. The test apparatus for the stress relaxation test of the wave spring of the engine according to claim 5, wherein:
the intelligent temperature control instrument (101) adopts a PID temperature control instrument.
7. The test apparatus for the stress relaxation test of the wave spring of the engine according to claim 5, wherein:
and a circulating air blowing device is also arranged in the test box (103).
8. A test method for a stress relaxation test of a wave spring of an engine is applied to test equipment for the stress relaxation test of the wave spring of the engine as claimed in claim 5, and is characterized by comprising the following steps:
s1, preparing a part to be tested (5), and obtaining a working pressure value born by the part to be tested (5) under a working assembly condition;
s2, completing the installation and debugging of the part (5) to be tested and the test equipment based on the working pressure value;
s3, after the intelligent temperature control instrument (101) inputs an alternating temperature curve, starting a test after the heating temperature control unit (1) is started;
s4, collecting stress relaxation test data of the part to be tested (5) under the working pressure value and alternating temperature environment by using the pressure measurement unit (2);
and S5, processing the acquired test data by using the display recording unit (3) to obtain a real-time change curve of the stress relaxation test data of the part (5) to be tested.
9. The test method for the stress relaxation test of the wave spring of the engine as claimed in claim 8, wherein the step S1 is to obtain the working pressure value of the part (5) to be tested under the working assembly condition, and the specific steps include:
s101, obtaining a working height value of a part (5) to be tested under a working assembly condition;
and S102, testing on a spring pressure testing machine to obtain a working pressure value of the part (5) to be tested under the working height value.
10. The testing method for the stress relaxation test of the wave spring of the engine as claimed in claim 8, wherein the step S2 of completing the installation and debugging of the part (5) to be tested and the testing equipment based on the working pressure value specifically comprises the following steps:
s201, selecting a pressure sensor (201) with a corresponding measuring range according to the size requirement of the working pressure value;
s202, connecting the pressure sensor (201) with a pressure measuring instrument (202), and zeroing the pressure measuring instrument (202);
s203, the pressure measuring instrument (202) and the intelligent temperature control instrument (101) are in communication connection with the display recording unit (3), and the values displayed on the pressure measuring instrument (202), the intelligent temperature control instrument (101) and the display recording unit (3) are kept consistent;
s204, fixedly mounting the pressure sensor (201) and the stud (402) on a bottom plate (405);
s205, placing the part (5) to be measured on the pressure sensor (201), and slightly applying pressure to the part (5) to be measured through the nut (403) and the pressing plate (404) to ensure that the part (5) to be measured cannot fall off;
s206, the assembled pressure loading unit (4) is placed into a test box (103), a nut (403) is screwed to adjust the pressure of a pressure plate (404) on the part to be measured (5), and the pressure loading unit stops when a pressure measuring instrument (202) reaches the working pressure value;
s207, closing the door of the test box (103).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011284194.4A CN112444459A (en) | 2020-11-17 | 2020-11-17 | Test equipment and method for stress relaxation test of engine wave spring |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011284194.4A CN112444459A (en) | 2020-11-17 | 2020-11-17 | Test equipment and method for stress relaxation test of engine wave spring |
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| CN102650578A (en) * | 2012-04-24 | 2012-08-29 | 北京航空航天大学 | Testing method for normal temperature and high temperature stress relaxation of flat spring |
| CN105910883A (en) * | 2016-04-11 | 2016-08-31 | 天津大学 | Predication method of stress relaxation life of torsion spring |
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