CN113588473A - Fretting wear test device and method for high-temperature and high-pressure water environment - Google Patents
Fretting wear test device and method for high-temperature and high-pressure water environment Download PDFInfo
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- CN113588473A CN113588473A CN202110844036.8A CN202110844036A CN113588473A CN 113588473 A CN113588473 A CN 113588473A CN 202110844036 A CN202110844036 A CN 202110844036A CN 113588473 A CN113588473 A CN 113588473A
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- 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
- G01N3/56—Investigating resistance to wear or abrasion
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a fretting wear test device and a fretting wear test method for a high-temperature and high-pressure water environment, wherein the device part comprises: the device comprises a clamping tool, a power system, a high-temperature high-pressure kettle, a force sensor group, a displacement sensor group and a control system. The invention is provided with an internal force sensor or an external force sensor in both tangential and normal directions, and the influence of the friction force between the clamp and the high-temperature high-pressure autoclave seal on test data is calculated and eliminated; the tangential power unit and the normal power unit are both provided with a double-displacement sensor, the differential transformer ensures the precision of micro-motion amplitude, and the magnetostrictive sensor can be used for a large-stroke test; the tangential clamp and the normal clamp are of an integrated structure and run through the high-temperature high-pressure kettle to form a self-balancing rod, so that the axial force generated by the internal pressure of the high-temperature high-pressure kettle is eliminated; the frame of the invention is of a horizontal structure, is horizontally arranged and has good vibration resistance; the high-temperature high-pressure kettle is of an up-and-down opening structure, so that the phenomenon that internal water flows out when the kettle cover is opened is avoided.
Description
Technical Field
The invention relates to the field of fretting wear tests, in particular to a fretting wear test device and a fretting wear test method for a high-temperature and high-pressure water environment.
Background
The service pipeline in the industrial fields of nuclear power and the like has special operating environment and complex working condition and has strict requirements on the service life, the service environment and the reliability of parts. Due to the fact that fretting wear is generated between the heat transfer pipe and the supporting part of the heat transfer pipe caused by vibration and pressure change caused by high-temperature water flow in the heat transfer pipe of the steam generator of the pressurized water reactor nuclear power station, the heat transfer pipe is worn and broken, and nuclear power safety is greatly threatened.
In actual working conditions, the relative motion form of the parts subjected to fretting wear is complex, and the parts are usually in multidirectional combined action. The particularity of nuclear power environment and the complexity of fretting wear working condition bring certain difficulty to the mechanical property test of the material. In order to study the corrosion fatigue, the flow vibration and other failure behaviors of nuclear power pipelines and materials and the service life of the materials, a simulation working condition test needs to be carried out in a simulation environment.
Publication No. CN104374661B 'A high-temperature high-pressure in-situ composite fretting wear test device', discloses a fretting wear test device which is of a vertical structure, uses a piezoelectric ceramic driver as a power source, and indirectly measures the friction force between friction samples through a load sensor outside an autoclave; balancing the force of the pressure in the autoclave on the moving shaft to the moving shaft by using a pressure balancing mechanism; but fails to separate the friction force of the sample and the friction force between the seal and the axis of motion.
Publication No. CN111948077A composite fretting wear test device of high temperature and high pressure discloses a fretting wear test device, which is of a horizontal structure, wherein the radial loading uses a low back clearance servo electric cylinder to realize the precise control of displacement and force, and a radial sensor realizes the force measurement through an auxiliary ejector rod and a fixture which is propped in an autoclave. The reciprocating motion is realized by adopting a servo motor and a connecting rod mechanism in the tangential direction, the friction force data is collected in real time through a load sensor arranged outside the high-pressure kettle, the diameter of a loading shaft is limited, and the interference of the friction force between a sealing device and a pull rod is reduced; but the link mechanism is poor in operability in adjusting the amplitude.
Disclosure of Invention
The invention provides a fretting wear test device and a fretting wear test method for a high-temperature and high-pressure water environment, aiming at solving the problems.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a fretting wear test device for a high-temperature and high-pressure water environment comprises: the device comprises a clamping tool for clamping a sample, a power system for driving the sample to move, a high-temperature high-pressure kettle for providing a high-temperature high-pressure water environment, a force sensor group for measuring a force value acting on the sample, a displacement sensor group for measuring the displacement of the sample, and a control system for controlling the force value and the displacement;
the test sample comprises a tangential test sample and a normal test sample, the clamping tool comprises a tangential clamp for clamping the tangential test sample and a normal clamp for clamping the normal test sample, the power system comprises a tangential power unit for driving the tangential clamp to move and a normal power unit for driving the normal clamp to move, and a tangential through hole matched with the tangential clamp and a normal through hole matched with the normal clamp are formed in the high-temperature high-pressure autoclave; the tangential fixture is arranged in the high-temperature high-pressure kettle, two ends of the tangential fixture respectively penetrate through the tangential through hole to the outside of the high-temperature high-pressure kettle, and the tangential power unit is fixedly connected with one end of the tangential fixture; the normal clamp is arranged in the high-temperature high-pressure kettle, two ends of the normal clamp respectively penetrate through the normal through hole to the outside of the high-temperature high-pressure kettle, and the normal power unit is fixedly connected with one end of the normal clamp;
the force sensor group comprises a tangential force sensor unit and a normal force sensor unit, the tangential force sensor unit comprises a first tangential internal force sensor and a second tangential internal force sensor, and the normal force sensor unit comprises a normal internal force sensor and a normal external force sensor;
the two ends of the first tangential internal force sensor are respectively connected with the tangential clamp and the tangential power unit; the second tangential internal force sensor is fixedly connected with one end of the tangential clamp far away from the tangential power unit;
the normal internal force sensor is fixedly connected with one end, close to the normal power unit, of the normal clamp, and two ends of the normal external force sensor are respectively connected with the normal internal force sensor and the normal power unit;
the displacement sensor group comprises a tangential displacement sensor unit for measuring the displacement of the tangential sample and a normal displacement sensor unit for measuring the displacement of the normal sample, the tangential displacement sensor unit is fixed on the tangential power unit, and the normal displacement sensor unit is fixed on the normal power unit;
and the control system controls the output of the power system according to the data of the force sensor group and the displacement sensor group.
Preferably, the tangential clamp and the normal clamp are both of unitary construction.
Preferably, the tangential displacement sensor unit includes a tangential differential transformer and a tangential magnetostrictive sensor, and the normal displacement sensor unit includes a normal differential transformer and a normal magnetostrictive sensor; the tangential differential transformer and the tangential magnetostrictive sensor are fixed on the tangential power unit, and the normal differential transformer and the normal magnetostrictive sensor are fixed on the normal power unit.
Preferably, the power system further comprises a tangential limiting snap ring and a tangential limiting switch for limiting the tangential power unit, and a normal limiting snap ring and a normal limiting switch for limiting the normal power unit; the two ends of the tangential limiting snap ring are respectively connected with the first tangential internal force sensor and the tangential power unit, the two ends of the normal limiting snap ring are respectively connected with the external force sensor and the normal power unit, the tangential limiting switch controls whether the tangential limiting snap ring limits the tangential power unit, and the normal limiting switch controls whether the normal limiting snap ring limits the normal power unit.
Preferably, the control system comprises a tangential control unit for controlling the tangential power unit and a normal control unit for controlling the normal power unit.
Preferably, the device also comprises a water cooling jacket for ensuring the working temperature; the water cooling jacket is respectively sleeved on the outer walls of the first tangential internal force sensor, the second tangential internal force sensor and the normal internal force sensor.
Preferably, the system also comprises a preheating system for providing environment medium water and an environment water loop device for circulating water; the system of preheating is equipped with preheating system delivery port and preheating system water inlet, and the autoclave is equipped with autoclave water inlet and autoclave delivery port, connects preheating system delivery port and autoclave water inlet and autoclave delivery port and preheating system water inlet through ambient water loop arrangement.
Preferably, the device also comprises a temperature sensor, a heating unit and a heating unit control system; the temperature sensor is fixed on the inner wall of the high-temperature high-pressure kettle and used for measuring the internal water environment temperature of the high-temperature high-pressure kettle and transmitting the measured temperature to the heating unit control system, and the heating unit control system is used for calculating the difference between the measured temperature and the preset internal water environment temperature and controlling the heating unit for heating the high-temperature high-pressure kettle according to the difference so that the internal water environment temperature of the high-temperature high-pressure kettle is maintained at the preset internal water environment temperature.
Preferably, the device further comprises a horizontal frame; the power system and the high-temperature autoclave are fixedly connected with the horizontal frame.
A fretting wear test method for a high-temperature and high-pressure water environment is used for performing fretting wear tests between tangential samples and normal samples, and comprises the following steps:
the tangential power unit drives the tangential sample to move, so that the tangential sample is enabled to be in micro-motion abutting against the normal sample, a force value acted on the tangential sample after the influence of the friction force between the tangential clamp and the high-temperature high-pressure autoclave seal is removed is obtained through the first tangential internal force sensor and the second tangential internal force sensor and is transmitted to the control unit, the displacement of the tangential sample is obtained through the tangential displacement sensor unit and is transmitted to the control unit, and the control unit controls the tangential power unit according to the received signal so as to control the motion state of the tangential sample;
the normal power unit drives the normal sample to move, so that the normal sample performs alternating impact or static pressure action on the tangential sample, a force value acting on the normal sample after the influence of friction force between the normal clamp and the high-temperature high-pressure autoclave seal is removed is obtained through the normal internal force sensor and the normal external force sensor, the force value is transmitted to the control unit, the displacement of the normal sample is obtained through the normal displacement sensor unit and is transmitted to the control unit, the control unit controls the normal power unit according to the received signal, and then the motion state of the normal sample is controlled.
The invention can obtain the following technical effects:
(1) the internal force sensor or the external force sensor is arranged in both the tangential direction and the normal direction, and the influence of the friction force between the clamp and the high-temperature high-pressure kettle seal on test data is calculated and eliminated through the two force sensors arranged in the same direction, so that the test data is more accurate;
(2) the tangential power unit and the normal power unit are both provided with a double-displacement sensor, a differential transformer ensures the precision of micro-motion amplitude, and the magnetostrictive sensor can be used for a large-stroke test;
(3) the tangential clamp and the normal clamp are of an integrated structure and run through the high-temperature high-pressure kettle to form a self-balancing rod, so that the axial force generated by the internal pressure of the high-temperature high-pressure kettle is eliminated;
(4) the frame is of a horizontal structure and is horizontally arranged, so that the vibration resistance is good;
(5) the high-temperature high-pressure kettle is of an up-and-down opening structure, so that the phenomenon that internal water flows out when the kettle cover is opened is avoided.
Drawings
FIG. 1 is a partial isometric view of a high temperature and high pressure water environment fretting wear test apparatus according to an embodiment of the invention;
FIG. 2 is a partial top view of a high temperature and high pressure water environment fretting wear test device according to an embodiment of the invention;
FIG. 3 is an overall plan view of the fretting wear test device for the high-temperature and high-pressure water environment according to the embodiment of the invention;
FIG. 4 is a partial cross-sectional view of a high temperature and high pressure water environment fretting wear test device according to an embodiment of the invention;
FIG. 5 is an overall side view of a fretting wear test device for a high temperature and high pressure water environment according to an embodiment of the invention;
FIG. 6 is a testing schematic block diagram of a fretting wear testing device for a high-temperature and high-pressure water environment according to an embodiment of the invention.
Wherein the reference numerals include: the device comprises a clamping tool 1, a power system 2, a high-temperature high-pressure kettle 3, a force sensor group 4, a displacement sensor group 5, a horizontal frame 6, a water cooling jacket 7, a heating unit 8, a control system 9, a power source 10, a preheating system 11, a normal clamp 1-1, a tangential clamp 1-2, a normal power unit 2-1, a tangential power unit 2-2, a high-temperature high-pressure kettle cover 3-1, a high-temperature high-pressure kettle body 3-2, an exhaust valve 3-3, a high-temperature high-pressure kettle water inlet 3-4, a high-temperature high-pressure kettle water outlet 3-5, a normal external force sensor 4-1, a normal internal force sensor 4-2, a first tangential internal force sensor 4-3, a second tangential internal force sensor 4-4, a normal differential transformer 5-1, a normal magnetostrictive sensor 5-2, a displacement sensor, a displacement sensors, a power source 10, a power source, a preheating system 11, a normal heating system, a high-3, a high-4, a high-2, a high-pressure autoclave, a high pressure vacuum system, a high pressure vacuum system, a vacuum, The device comprises a tangential differential transformer 5-3, a tangential magnetostrictive sensor 5-4, a tangential limiting snap ring 5-5, a normal limiting snap ring 5-6, a kettle cover heating unit 8-1, an upper kettle body heating unit 8-2, a lower kettle body heating unit 8-3, a preheating box 11-1, a preheating system water outlet 11-2, a preheating system water inlet 11-3, a pressure gauge 11-4, a temperature sensor 12-1 and a temperature sensor protective sleeve 12-2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to fig. 3, the fretting wear test device for a high-temperature and high-pressure water environment according to an embodiment of the present invention includes: the device comprises a clamping tool 1 for clamping a sample, a power system 2 for driving the sample to move, a high-temperature high-pressure kettle 3 for providing a high-temperature high-pressure water environment, a force sensor group 4 for measuring a force value acting on the sample, a displacement sensor group 5 for measuring the displacement of the sample, and a control system 9 for controlling the force value and the displacement;
the sample comprises a tangential sample and a normal sample, as shown in fig. 2, the clamping tool 1 comprises a tangential clamp 1-2 for clamping the tangential sample and a normal clamp 1-1 for clamping the normal sample, the power system 2 comprises a tangential power unit 2-2 for driving the tangential clamp 1-2 to move and a normal power unit 2-1 for driving the normal clamp 1-1 to move, and a tangential through hole matched with the tangential clamp 1-2 and a normal through hole matched with the normal clamp 1-1 are formed in the high-temperature autoclave 3; the tangential fixture 1-2 is arranged in the high-temperature high-pressure kettle 3, two ends of the tangential fixture respectively penetrate through the tangential through hole to the outside of the high-temperature high-pressure kettle 3, and the tangential power unit 2-2 is fixedly connected with one end of the tangential fixture; the normal clamp 1-1 is arranged in the high-temperature high-pressure kettle 3, two ends of the normal clamp respectively penetrate through the normal through hole to the outside of the high-temperature high-pressure kettle 3, and the normal power unit 2-1 is fixedly connected with one end of the normal clamp; during testing, the tangential power unit 2-2 drives the tangential clamp 1-2 to move along the axial direction of the tangential clamp 1-2, so as to drive the tangential sample to move along the axial direction of the tangential clamp 1-2, and the normal power unit 2-1 drives the normal clamp 1-1 to move along the axial direction of the normal clamp 1-1, so as to drive the normal sample to move along the axial direction of the normal clamp 1-1.
As shown in fig. 2 and 4, the force sensor group 4 comprises a tangential force sensor unit and a normal force sensor unit, wherein the tangential force sensor unit comprises a first tangential internal force sensor 4-3 and a second tangential internal force sensor 4-4, and the normal force sensor unit comprises a normal internal force sensor 4-2 and a normal external force sensor 4-1; in performing the test, the first tangential internal force sensor 4-3 and the second tangential internal force sensor 4-4 measure the force exerted on the tangential specimen, and the normal internal force sensor 4-2 and the normal external force sensor 4-1 measure the force exerted on the normal specimen; and calculating the force exerted on the tangential sample after removing the influence of the friction force between the tangential clamp 1-2 and the seal of the high-temperature autoclave 3 according to the forces measured by the first tangential internal force sensor 4-3 and the second tangential internal force sensor 4-4, and calculating the force exerted on the normal sample after removing the influence of the friction force between the normal clamp 1-1 and the seal of the high-temperature autoclave 3 according to the forces measured by the normal internal force sensor 4-2 and the normal external force sensor 4-1.
Two ends of the first tangential internal force sensor 4-3 are respectively connected with the tangential clamp 1-2 and the tangential power unit 2-2; the second tangential internal force sensor 4-4 is fixedly connected with one end of the tangential clamp 1-2 far away from the tangential power unit 2-2;
the normal internal force sensor 4-2 is fixedly connected with one end, close to the normal power unit 2-1, of the normal clamp 1-1, and two ends of the normal external force sensor 4-1 are respectively connected with the normal internal force sensor 4-2 and the normal power unit 2-1;
the displacement sensor group 5 comprises a tangential displacement sensor unit for measuring the displacement of the tangential sample and a normal displacement sensor unit for measuring the displacement of the normal sample, the tangential displacement sensor unit is fixed on the tangential power unit 2-2, and the normal displacement sensor unit is fixed on the normal power unit 2-1;
the control system 9 controls the output of the force system 2 on the basis of the data of the force sensor group 4 and the displacement sensor group 5.
In one embodiment of the invention, the tangential clamp 1-2 and the normal clamp 1-1 are both of an integrated structure and penetrate through the high-temperature autoclave 3 to form a self-balancing rod, so that the axial force generated by the internal pressure of the high-temperature autoclave 3 is eliminated, and the error caused by the axial force of a non-integrated structure is avoided.
As shown in fig. 2, in one embodiment of the present invention, the tangential displacement sensor unit includes a tangential differential transformer 5-3 and a tangential magnetostrictive sensor 5-4, and the normal displacement sensor unit includes a normal differential transformer 5-1 and a normal magnetostrictive sensor 5-2; the tangential differential transformer 5-3 and the tangential magnetostrictive sensor 5-4 are fixed on the tangential power unit 2-2, and the normal differential transformer 5-1 and the normal magnetostrictive sensor 5-2 are fixed on the normal power unit 2-1; the differential transformer is used for collecting displacement signals in the test process, the precision of micro-motion amplitude in the test process is guaranteed, the magnetostrictive sensor is used for adjusting the mounting position of a sample, and the device can be used for expanding clamps in different forms and large-stroke tests, and the universality of the device is improved.
As shown in FIG. 3, in one embodiment of the present invention, a power source 10 for providing power is further included, and both the tangential power unit 2-2 and the normal power unit 2-1 are fixedly connected to the power source 10.
In one embodiment of the invention, the power source 10 is a hydraulic station, and the tangential power unit 2-2 and the normal power unit 2-1 are both servo hydraulic cylinders, so that the precision of the servo hydraulic cylinders is high, and the operation precision of the test device can be ensured.
In one embodiment of the invention, the power system 2 further comprises a tangential limit snap ring 5-5 and a tangential limit switch for limiting the tangential power unit 2-2, and a normal limit snap ring 5-6 and a normal limit switch for limiting the normal power unit 2-1; the two ends of the tangential limiting snap ring 5-5 are respectively connected with the first tangential internal force sensor 4-3 and the tangential power unit 2-2, the two ends of the normal limiting snap ring 5-6 are respectively connected with the external force sensor 4-1 and the normal power unit 2-1, the tangential limiting switch controls whether the tangential limiting snap ring 5-5 limits the tangential power unit 2-2 or not, and the normal limiting switch controls whether the normal limiting snap ring 5-6 limits the normal power unit 2-1 or not; carry on spacingly through spacing snap ring to power unit, prevent power unit butt sensor, and then prevent to cause the impact to the sensor and arouse the damage.
As shown in FIG. 6, in one embodiment of the present invention, the control system 9 includes a tangential control unit for controlling the tangential power unit 2-2 and a normal control unit for controlling the normal power unit 2-1; during testing, the tangential control unit receives force signals collected by the tangential force sensor unit and displacement signals collected by the tangential displacement sensor unit, drives the tangential power unit 2-2 to perform micro-motion, and the normal control unit receives force signals collected by the normal force sensor unit and displacement signals collected by the normal displacement sensor unit, and drives the normal power unit 2-1 to perform alternating impact, static pressure and other actions.
In one embodiment of the invention, the sealing ring is used for preventing the high-temperature autoclave 3 from leaking; and sealing rings are arranged in the tangential through hole and the normal through hole, and are used for filling a gap between the tangential clamp 1-2 and the tangential through hole and a gap between the normal clamp 1-1 and the normal through hole, preventing water in the high-temperature high-pressure autoclave 3 from flowing out of the gap, and ensuring that the pressure in the high-temperature high-pressure autoclave 3 is maintained at a test pressure.
As shown in fig. 2, in one embodiment of the present invention, a water cooling jacket 7 for ensuring the working temperature is further included; the water cooling jacket 7 is respectively sleeved on the outer walls of the first tangential internal force sensor 4-3, the second tangential internal force sensor 4-4 and the normal internal force sensor 4-2, so that the working temperature of the internal force sensors is ensured, and the normal work of the internal force sensors is prevented from being influenced by overhigh temperature.
As shown in fig. 3, in one embodiment of the present invention, a preheating system 11 for providing environmental medium water and an environmental water circuit device for circulating water are further included; the preheating system 11 is provided with a preheating system water outlet 11-2 and a preheating system water inlet 11-3, the high-temperature high-pressure kettle 3 is provided with a high-temperature high-pressure kettle water inlet 3-4 and a high-temperature high-pressure kettle water outlet 3-5, the preheating system water outlet 11-2 and the high-temperature high-pressure kettle water inlet 3-4 are connected through an ambient water loop device, the high-temperature high-pressure kettle water outlet 3-5 and the preheating system water inlet 11-3 are connected through the ambient water loop device, ambient medium water is heated to a test temperature through the preheating system 11, namely, the internal water environment temperature is preset, water circulation is carried out between the ambient water loop device and the high-temperature high-pressure kettle 3, and the internal water environment temperature of the high-temperature high-pressure kettle 3 is ensured to be the preset internal water environment temperature; the high-temperature high-pressure kettle 3 is in a high-pressure environment, and the preheating system 11 is in a normal-pressure environment, so that the environmental water loop device is designed to be a pressure control loop, and the pressure in the water loop is stable.
As shown in fig. 5, the preheating system 11 further includes a preheating tank 11-1 and a pressure gauge 11-4, and a temperature control system is provided in the preheating tank 11-1 to precisely control the preheating temperature.
As shown in FIG. 2, in one embodiment of the present invention, a temperature sensor 12-1, a heating unit 8 and a heating unit control system are further included; the temperature sensor 12-1 is fixed on the inner wall of the high-temperature high-pressure autoclave 3, and is configured to measure the internal water environment temperature of the high-temperature high-pressure autoclave 3, and transmit the measured temperature to the heating unit control system, and the heating unit control system is configured to calculate a difference between the measured temperature and a preset internal water environment temperature, and control the heating unit 8 configured to heat the high-temperature high-pressure autoclave 3 according to the difference, so that the internal water environment temperature of the high-temperature high-pressure autoclave 3 is maintained at the preset internal water environment temperature.
As shown in figure 5, the high-temperature high-pressure kettle 3 further comprises a high-temperature high-pressure kettle cover 3-1, a high-temperature high-pressure kettle body 3-2 and an exhaust valve 3-3, the heating unit 8 comprises a kettle cover heating unit 8-1, an upper kettle body heating unit 8-2 and a lower kettle body heating unit 8-3, and a temperature sensor protective sleeve 12-2 is sleeved on the temperature sensor 12-1.
As shown in fig. 1-3, in one embodiment of the present invention, a horizontal frame 6 is further included; the power system 2 and the high-temperature high-pressure kettle 3 are fixedly connected with the horizontal frame 6, the horizontal frame 6 is integrally formed in a casting mode, impact force during testing can be better borne, and potential safety hazards such as toppling and desoldering which are possibly caused when a vertical frame or a welding frame is adopted are avoided.
The above details describe the structure of the fretting wear test device for high-temperature and high-pressure water environment provided by the invention, and the invention also provides a method for performing the fretting wear test for high-temperature and high-pressure water environment by using the test device, which corresponds to the test device.
As shown in fig. 6, the fretting wear test method for a high-temperature and high-pressure water environment provided by the embodiment of the invention is used for performing a fretting wear test between a tangential sample and a normal sample, and comprises the following steps:
the tangential power unit 2-2 drives the tangential sample to move, so that the tangential sample is enabled to perform micro-motion action of abutting against the normal sample, a force value acted on the tangential sample after the influence of the friction force between the tangential clamp 1-2 and the high-temperature high-pressure autoclave 3 seal is removed is obtained through the first tangential internal force sensor 4-3 and the second tangential internal force sensor 4-4, namely the friction force between the tangential sample and the normal sample, and is transmitted to the tangential control unit of the control unit, the displacement, namely the vibration amplitude value of the tangential sample is obtained through the tangential displacement sensor unit and is transmitted to the tangential control unit of the control unit, and the tangential control unit controls the tangential power unit 2-2 according to the received signal, so that the motion state of the tangential sample is controlled;
the normal power unit 2-1 drives the normal sample to move, so that the normal sample performs alternating impact or static pressure action on the tangential sample, a force value acting on the normal sample after the influence of the friction force between the normal clamp 1-1 and the high-temperature high-pressure autoclave 3 seal is removed is obtained through the normal internal force sensor 4-2 and the normal external force sensor 4-1, namely the impact force or the static pressure between the tangential sample and the normal sample, and is transmitted to the normal control unit of the control unit, the displacement of the normal sample, namely the impact amplitude value is obtained through the normal displacement sensor unit and is transmitted to the normal control unit of the control unit, and the normal control unit controls the normal power unit 2-1 according to the received signal, so that the motion state of the normal sample is controlled.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and alterations of the above-described embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A fretting wear test device for a high-temperature and high-pressure water environment is characterized by comprising: the device comprises a clamping tool for clamping a sample, a power system for driving the sample to move, a high-temperature high-pressure kettle for providing a high-temperature high-pressure water environment, a force sensor group for measuring a force value acting on the sample, a displacement sensor group for measuring the displacement of the sample, and a control system for controlling the force value and the displacement;
the test sample comprises a tangential test sample and a normal test sample, the clamping tool comprises a tangential clamp for clamping the tangential test sample and a normal clamp for clamping the normal test sample, the power system comprises a tangential power unit for driving the tangential clamp to move and a normal power unit for driving the normal clamp to move, and a tangential through hole matched with the tangential clamp and a normal through hole matched with the normal clamp are formed in the high-temperature autoclave; the tangential fixture is arranged in the high-temperature high-pressure kettle, two ends of the tangential fixture respectively penetrate through the tangential through hole to the outside of the high-temperature high-pressure kettle, and the tangential power unit is fixedly connected with one end of the tangential fixture; the normal clamp is arranged in the high-temperature high-pressure kettle, two ends of the normal clamp respectively penetrate through the normal through hole to the outside of the high-temperature high-pressure kettle, and the normal power unit is fixedly connected with one end of the normal clamp;
the force sensor group comprises a tangential force sensor unit and a normal force sensor unit, the tangential force sensor unit comprises a first tangential internal force sensor and a second tangential internal force sensor, and the normal force sensor unit comprises a normal internal force sensor and a normal external force sensor;
the two ends of the first tangential internal force sensor are respectively connected with the tangential clamp and the tangential power unit; the second tangential internal force sensor is fixedly connected with one end of the tangential clamp far away from the tangential power unit;
the normal internal force sensor is fixedly connected with one end, close to the normal power unit, of the normal clamp, and two ends of the normal external force sensor are respectively connected with the normal internal force sensor and the normal power unit;
the displacement sensor group comprises a tangential displacement sensor unit for measuring the displacement of the tangential sample and a normal displacement sensor unit for measuring the displacement of the normal sample, the tangential displacement sensor unit is fixed on the tangential power unit, and the normal displacement sensor unit is fixed on the normal power unit;
and the control system controls the output of the power system according to the data of the force sensor group and the displacement sensor group.
2. The fretting wear test device in a high-temperature and high-pressure water environment of claim 1, wherein the tangential clamp and the normal clamp are of an integrated structure.
3. The fretting wear test device for the high-temperature and high-pressure water environment according to claim 1, wherein the tangential displacement sensor unit comprises a tangential differential transformer and a tangential magnetostrictive sensor, and the normal displacement sensor unit comprises a normal differential transformer and a normal magnetostrictive sensor; the tangential differential transformer and the tangential magnetostrictive sensor are both fixed on the tangential power unit, and the normal differential transformer and the normal magnetostrictive sensor are both fixed on the normal power unit.
4. The high-temperature high-pressure water environment fretting wear test device of claim 1, wherein the power system further comprises a tangential limit snap ring and a tangential limit switch for limiting the tangential power unit, and a normal limit snap ring and a normal limit switch for limiting the normal power unit; the two ends of the tangential limiting snap ring are respectively connected with the first tangential internal force sensor and the tangential power unit, the two ends of the normal limiting snap ring are respectively connected with the normal external force sensor and the normal power unit, the tangential limiting switch controls whether the tangential limiting snap ring is right or not, the tangential power unit is limited, and the normal limiting switch controls whether the normal limiting snap ring is right or not.
5. The fretting wear test device in a high-temperature and high-pressure water environment of claim 1, wherein the control system comprises a tangential control unit for controlling the tangential power unit and a normal control unit for controlling the normal power unit.
6. The fretting wear test device for the high-temperature and high-pressure water environment as claimed in claim 1, further comprising a water cooling jacket for ensuring the working temperature; the water cooling jacket is respectively sleeved on the outer walls of the first tangential internal force sensor, the second tangential internal force sensor and the normal internal force sensor.
7. The fretting wear test device for the high-temperature and high-pressure water environment as claimed in claim 1, further comprising a preheating system for providing environment medium water and an environment water loop device for water circulation; the preheating system is provided with a preheating system water outlet and a preheating system water inlet, the high-temperature high-pressure kettle is provided with a high-temperature high-pressure kettle water inlet and a high-temperature high-pressure kettle water outlet, and the environment water loop device is connected with the preheating system water outlet, the high-temperature high-pressure kettle water inlet and the high-temperature high-pressure kettle water outlet, and the preheating system water inlet.
8. The fretting wear test device for the high-temperature and high-pressure water environment according to claim 1, further comprising a temperature sensor, a heating unit and a heating unit control system; the temperature sensor is fixed on the inner wall of the high-temperature high-pressure kettle and used for measuring the internal water environment temperature of the high-temperature high-pressure kettle and transmitting the measured temperature to the heating unit control system, and the heating unit control system is used for calculating the difference between the measured temperature and the preset internal water environment temperature and controlling the heating unit used for heating the high-temperature high-pressure kettle according to the difference so as to maintain the internal water environment temperature of the high-temperature high-pressure kettle at the preset internal water environment temperature.
9. The fretting wear test device in a high-temperature and high-pressure water environment of claim 1, further comprising a horizontal frame; the power system and the high-temperature autoclave are fixedly connected with the horizontal frame.
10. A fretting wear test method for a high-temperature and high-pressure water environment is used for performing fretting wear tests between tangential samples and normal samples, and is characterized by comprising the following steps:
the tangential sample is driven to move by a tangential power unit, so that the tangential sample is enabled to perform micro-motion action of abutting against the normal sample, a force value acted on the tangential sample after the influence of the friction force between a tangential clamp and a high-temperature autoclave seal is removed is obtained by a first tangential internal force sensor and a second tangential internal force sensor and is transmitted to a control unit, the displacement of the tangential sample is obtained by a tangential displacement sensor unit and is transmitted to the control unit, and the control unit controls the tangential power unit according to a received signal so as to control the motion state of the tangential sample;
the normal power unit drives the normal sample to move, so that the normal sample performs alternating impact or static pressure action on the tangential sample, a force value acting on the normal sample after the influence of friction force between a normal clamp and the high-temperature high-pressure autoclave seal is removed is obtained through a normal internal force sensor and a normal external force sensor and is transmitted to the control unit, the displacement of the normal sample is obtained through a normal displacement sensor unit and is transmitted to the control unit, and the control unit controls the normal power unit according to a received signal to further control the motion state of the normal sample.
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| CN113588473B (en) | 2023-06-20 |
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