Friction and wear testing device for high-temperature and high-pressure fluid lubrication rotating plane

Abstract

The invention discloses a high-temperature and high-pressure fluid lubrication rotating plane frictional wear testing device, and belongs to the technical field of extreme working condition tribology testing. The device is characterized in that a lifting device and a loading cylinder are simultaneously fixed at the top of a test stand bracket, a piston rod of the loading cylinder is connected with a tension sensor and a water-cooling loading shaft, and the water-cooling loading shaft is connected with a lower sample piece (static ring) in a high-temperature and high-pressure test cavity through a spherical universal joint; the oil-cooling main shaft is fixedly connected with an upper sample piece (moving ring) in the high-temperature and high-pressure test cavity through a locking nut, so that the axial load of the water-cooling loading shaft and the oil-cooling main shaft in a non-concentric state can be uniformly loaded, and the end surfaces of the upper sample piece and the lower sample piece can be automatically attached to each other. The upper part of the high-temperature and high-pressure test cavity is connected with the water-cooling jacket, and the lower part is connected with the bearing cavity. High pressure of the test chamber is guaranteed by a high-pressure water station system, and high temperature is adjusted and controlled by an electric heater and a water cooling jacket. The device can realize the rotary sliding friction wear test of a friction pair in a high-temperature and high-pressure water environment.

Description

Technical Field

[0001] The invention relates to the technical field of tribological testing under extreme working conditions, and in particular to a rotating friction and wear testing device under a high-temperature and high-pressure fluid lubrication environment. Background Art

[0002] Extreme conditions tribology research is an important field that involves the performance of phenomena such as friction, wear and lubrication in extreme environments. These environments include high temperature, high pressure, low temperature, vacuum, corrosiveness and high load, and are widely used in industries such as nuclear power, aerospace, petroleum and petrochemicals, machinery manufacturing, energy and metallurgy. Mastering tribological testing technology under extreme conditions is of great significance to modern industry, because the failure of equipment or parts under these conditions may lead to serious consequences. Through tribological testing, the performance of materials under extreme conditions can be predicted and evaluated, thereby improving equipment safety and reliability, extending material service life, and reducing maintenance costs. At the same time, an in-depth understanding of the basic mechanisms of friction, wear and lubrication can provide theoretical support and guarantee for related technologies.

[0003] The main key equipment for the testing and evaluation of the tribological properties of materials or surface coatings is usually a friction and wear test device. The tribological properties and wear mechanisms of friction pair materials such as friction coefficient, wear amount, wear morphology under different lubrication conditions are important research contents of material friction and wear. At present, the commonly used sample forms of friction and wear test devices are mainly pin-disc, ring-block and disc-disc, and the sliding modes are reciprocating and rotary. An axial load is applied to the end face of the friction pair, and a certain reciprocating frequency or circumferential rotation speed is used to achieve the relative movement of the friction pair. The data of the test sample is collected through relevant sensors to obtain information such as the friction coefficient and wear amount of the friction pair. However, the friction and wear performance of the friction pair is affected by the operating environment in which it is located. Although some friction and wear testers have the ability to simulate water, oil or air conditions at normal temperature and pressure, they cannot simulate the working environment of high temperature and high pressure water medium. In this way, it is impossible to accurately detect and evaluate the tribological performance of the friction pair material under high temperature and high pressure water medium conditions. Summary of the invention

[0004] The present invention provides a disc-disc or pin-disc high-speed rotating friction and wear test device capable of simulating a high-temperature and high-pressure water medium working environment, so as to solve the problems raised in the above background technology.

[0005] The technical solution adopted by the present invention is: a high-temperature and high-pressure fluid lubricated rotating plane friction and wear testing device, which includes a test bench bracket, characterized in that: the test bench bracket fixes a lifting device, a loading cylinder, a bearing cavity and a driving motor from top to bottom; the upper part of the high-temperature and high-pressure test cavity in the device is connected to a water-cooling jacket, and the lower part of the high-temperature and high-pressure test cavity is connected to the bearing cavity;

[0006] In the lifting device, the worm gear reduction device drives the sprocket through the transmission shaft, and the sprocket is engaged with the chain; one end of the chain is connected to the high temperature and high pressure test chamber through the lifting lock, and the other end of the chain is connected to the counterweight beam after passing through the guide wheel; the sliders at both ends of the counterweight beam act on the linear guide rail to realize the lifting and lowering of the high temperature and high pressure test chamber;

[0007] The piston rod of the loading cylinder is connected to the tension sensor and the water-cooled loading shaft. The water-cooled loading shaft passes through the water-cooling jacket and is inserted into the high-temperature and high-pressure test chamber. A spherical universal joint is arranged on the end thereof. The driving motor is connected to one end of the oil-cooled main shaft through a coupling. The other end of the oil-cooled main shaft passes through the bearing chamber and is arranged in the high-temperature and high-pressure test chamber.

[0008] In the high temperature and high pressure test chamber, the chamber gland, the chamber body and the chamber bottom plate surround the external chamber through studs and stud nuts, and the interior of the external chamber is the test chamber; the sample loading part in the test chamber is fixed on the sample loading part fixing plate, and the sample loading part fixing plate is locked on the oil cooling spindle through locking nuts;

[0009] The lower sample piece is fixed on the lower sample piece fixing plate, and the lower sample piece fixing plate is connected to the loading shaft connecting plate through connecting studs and connecting nuts; the loading shaft connecting plate is connected to the spherical universal joint, and the end faces of the lower sample piece and the upper sample piece are self-adjusted and leveled when subjected to axial load.

[0010] The contact surface of the spherical universal joint is a convex and concave spherical surface match, the convex spherical surface end is connected to the water-cooled loading shaft, and the concave spherical surface end is connected to the lower sample piece. When an axial load is applied, the axial load of the water-cooled loading shaft and the oil-cooled main shaft in a non-concentric state is evenly loaded.

[0011] In the water-cooling jacket, a water-cooling cavity is arranged between the water-cooling outer cavity and the water-cooling inner cavity, and the inner ring of the water-cooling inner cavity cooperates with the water-cooling loading shaft.

[0012] An outer sealing ring is arranged between the water-cooled outer cavity and the water-cooled inner cavity, and an inner sealing ring is arranged between the water-cooled inner cavity and the water-cooled loading shaft.

[0013] A water cooling joint is arranged on the water cooling outer cavity, and the water cooling joint is communicated with the water cooling cavity.

[0014] An inner water cooling channel is arranged in the water cooling loading shaft.

[0015] A wound gasket is arranged between the cavity body and the cavity cover and the cavity bottom plate respectively; an electric heater and a temperature sensor are arranged on the external cavity; and a cooling channel is arranged on the cavity body.

[0016] The bearing cavity comprises a high-pressure mechanical seal, a baffle ring, a lip seal and a paired angular contact ball bearing. The high-pressure mechanical seal is arranged at the upper part of the bearing cavity, and the baffle ring is arranged at the bottom of the high-pressure mechanical seal, and an overflow structure is adopted; the paired angular contact ball bearing acts on the oil-cooled main shaft, and an oil seal cavity is arranged at the bottom of the paired angular contact ball bearing.

[0017] An oil cooling channel is arranged inside the oil cooling main shaft, and a throttling tooth for isolating a high-temperature fluid is arranged outside the main shaft.

[0018] The device is also provided with a gas control system, an oil station system, a high-pressure water station system, and a data acquisition and control system. The gas control system is connected to the loading cylinder for controlling the loading cylinder; the oil station system is connected to the bearing cavity, the high-pressure water station system is connected to the high-temperature and high-pressure test cavity, and the data acquisition and control system is electrically connected to the tension sensor, temperature sensor, torque sensor, gas control system, oil station system, and high-pressure water station system.

[0019] Specifically, the lifting device and the loading cylinder are fixed to the top of the test bench bracket at the same time, the piston rod of the loading cylinder is connected to the tension sensor and the water-cooled loading shaft, the water-cooled loading shaft is connected to the lower sample (static ring) in the high-temperature and high-pressure test chamber through a spherical universal joint, the oil-cooled main shaft and the upper sample (dynamic ring) in the high-temperature and high-pressure test chamber are connected and fixed through a locking nut, the oil-cooled main shaft and the torque meter are connected to the drive motor through a coupling, the upper part of the high-temperature and high-pressure test chamber is connected to the water-cooled jacket, the lower part of the high-temperature and high-pressure test chamber is connected to the bearing chamber, and the lower part of the bearing chamber and the drive motor are fixed to the test bench bracket at the same time.

[0020] Furthermore, the lifting device is connected to the high temperature and high pressure test chamber by a worm gear reducer through a transmission shaft, a sprocket, a support seat, a chain, and a lifting lock. The other side of the chain is connected to the counterweight beam through a guide wheel. At the same time, both sides of the counterweight beam are connected to linear guide rails to form a lifting and lowering channel.

[0021] Furthermore, an internal water-cooling channel consisting of two elongated holes is arranged inside the water-cooled loading shaft, the bottom of which is connected to the spherical end of the spherical universal joint through a thread, and the concave ball end of the spherical universal joint is connected to the lower sample piece through a lower sample piece fixing chassis.

[0022] Furthermore, the water-cooling jacket is composed of a water-cooling inner cavity and a water-cooling outer cavity, and is sealed by an O-ring. The water-cooling outer cavity is positioned and fixed by a cylindrical head of a hexagon socket screw, and cooling water flows through a water-cooling joint.

[0023] Furthermore, the high temperature and high pressure test chamber is fixedly connected by a chamber cover, a chamber body, a chamber chassis, and a winding gasket through studs, hexagonal nuts, and gaskets, and the chamber body has a cooling channel and an electric heater.

[0024] Furthermore, an oil cooling channel is arranged inside the oil cooling spindle, and a throttle tooth with a small gap is arranged outside. Meanwhile, the oil cooling spindle, the sample loading piece, and the sample loading piece fixing plate are fixed by a locking nut.

[0025] Furthermore, a high-pressure mechanical seal assembly is provided between the bearing cavity and the high-temperature and high-pressure test chamber.

[0026] Furthermore, a baffle ring, an angular contact ball bearing, and multiple sets of lip seals are arranged between the bearing cavity and the oil sealing cavity.

[0027] The invention also provides a gas control system, an oil station system, a high-pressure water station system and a data acquisition and control system.

[0028] Furthermore, the compressed air enters both ends of the cylinder piston through a set of filtering and reducing pressure devices, a proportional pressure regulating valve, and a throttling one-way valve. The proportional pressure regulating valve is connected to the PLC system to achieve axial load loading adjustment of the sample.

[0029] Furthermore, the oil station system is composed of a filter, an oil pump, a relief valve, a back pressure valve, and a heat exchanger.

[0030] Furthermore, the high-pressure water system is composed of a filter, a high-pressure plunger pump, an accumulator, a relief valve, a pressure transmitter, a temperature transmitter, and a back-pressure valve.

[0031] The beneficial effects of the present invention are:

[0032] 1) The present invention provides a disc-disc or pin-disc rotating friction and wear test device in a high-temperature and high-pressure water environment, which can realize the rotating sliding friction and wear test of the friction pair in a high-temperature and high-pressure water environment. The temperature and pressure of the water in the chamber and the axial load signal applied by the friction pair are collected by the sensor and regulated by the control system. At the same time, the friction torque and wear data of the friction pair are collected by the sensor.

[0033] 2) The present invention provides a lifting device with a self-locking function, which adopts a worm gear transmission method to realize a low-speed, self-locking lifting device. At the same time, it is equipped with a counterweight beam installed on a high-precision linear guide rail, making the lifting device more stable and reliable.

[0034] 3) The present invention provides a water-cooled loading shaft and a water-cooled jacket on the top of the high-temperature and high-pressure test chamber, thereby reducing the influence of the high temperature in the high-temperature and high-pressure test chamber on the size and strength of the loading shaft.

[0035] 4) The present invention provides a spherical universal joint, whose contact surface is a convex and concave spherical surface match, the convex spherical surface end is connected to the water-cooled loading rod, and the concave spherical surface end is connected to the lower sample piece. When an axial load is applied, the axial load of the water-cooled loading shaft and the oil-cooled main shaft in a non-concentric state can be evenly loaded, so that the end faces of the upper and lower sample pieces are automatically attached to each other, and the end faces are fully attached.

[0036] 5) The present invention provides a throttle tooth, which is installed at the bottom of the high-temperature and high-pressure test chamber and on the side of the water-cooled main shaft, and is used to isolate the influence of the high-temperature fluid on the performance and strength of the lower high-pressure mechanical seal, thereby improving the safety and reliability of the setting.

[0037] 6) The present invention provides a high-pressure mechanical seal, which is installed on the upper part of the bearing cavity to solve the problem of rotary sealing under high temperature and high pressure conditions.

[0038] 7) The present invention provides a deflector ring installed at the bottom of the high-pressure mechanical seal, which adopts an overflow structure. When the atmospheric side seal of the high-pressure mechanical seal fails, the deflector ring is used to block it and the pressure is reduced and eliminated from the leakage port, which can effectively prevent high-pressure water from directly spraying into the bearing, causing bearing damage and causing equipment failure.

[0039] 8) The present invention provides an oil-cooled spindle, which has an oil-cooling circulation channel inside and cooperates with a lip seal to achieve a rotary sealing function, effectively reducing the operating temperature of the spindle and improving the safety and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is an overall schematic diagram of the present invention.

[0041] Figure 2 It is a stereogram of the experimental test device of the present invention.

[0042] Figure 3 It is a front view of the experimental test device of the present invention.

[0043] Figure 4 It is a structural diagram of the lifting device of the present invention.

[0044] Figure 5 It is a structural diagram of the water cooling jacket of the present invention.

[0045] Figure 6 This is a structural diagram of the water-cooled loading shaft of the present invention.

[0046] Figure 7 This is a structural diagram of the high temperature and high pressure test chamber of the present invention.

[0047] Figure 8 This is an enlarged view of the throttle tooth.

[0048] Fig. 9 This is a structural diagram of the bearing cavity and main shaft of the present invention.

[0049] Description of reference numerals: 1. lifting device, 101. transmission shaft, 102. sprocket, 103. support seat, 104. chain, 105. lifting lock, 106. worm gear of reduction device, 107. guide wheel, 108. linear guide rail, 109. counterweight beam;

[0050] 2. Loading cylinder, 3. Tension sensor, 4. Water-cooled loading shaft, 401. Inner water-cooling flow channel, 402. Ball universal joint, 5. Water-cooling jacket, 501. Water-cooling joint, 502. External sealing ring, 503. Water-cooled outer cavity, 504. Internal sealing ring, 505. Water-cooled inner cavity, 506. Hexagon socket head screw;

[0051] 6. High temperature and high pressure test chamber, 601. Spiral wound gasket, 602. Connecting nut, 603. Loading shaft connecting plate, 604. Connecting stud, 605. Cooling channel, 606. Sample loading part, 607. Sample lowering part, 608. Sample lowering part fixing plate, 609. Temperature sensor, 610. Electric heater, 611. Stud, 612. Stud nut, 613. Gasket, 614. Cavity gland, 615. Cavity body, 616. Locking nut, 617. Sample loading part fixing plate, 618. Throttle tooth;

[0052] 7. bearing cavity, 701. baffle ring, 702. lip seal, 703. angular contact ball bearing, 704. oil-cooled bearing, 705. oil seal cavity, 706. high-pressure mechanical seal;

[0053] 8. Support, 9. Coupling, 10. Drive motor, 11. Test bench bracket, 12. Shock-absorbing foot, 13. Torque sensor, 14. Gas control system, 15. Oil station system, 16. High-pressure water station system, 17. Data acquisition and control system. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the embodiments of the present invention is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the embodiments of the present invention and are not used to limit the embodiments of the present invention.

[0055] A high-temperature and high-pressure fluid-lubricated rotating plane friction and wear testing device, which is simultaneously fixed to the top of a test bench bracket by a lifting device and a loading cylinder, the piston rod of the loading cylinder is connected to a tension sensor and a water-cooled loading shaft, the water-cooled loading shaft is connected to a lower sample (static ring) in a high-temperature and high-pressure test chamber through a spherical universal joint, the oil-cooled main shaft is connected and fixed to an upper sample (dynamic ring) in the high-temperature and high-pressure test chamber through a locking nut, the oil-cooled main shaft and a torque meter are connected to a drive motor through a coupling, the upper part of the high-temperature and high-pressure test chamber is connected to a water-cooled jacket, the lower part of the high-temperature and high-pressure test chamber is connected to a bearing chamber, and the lower part of the bearing chamber and the drive motor are simultaneously fixed to the test bench bracket.

[0056] The lifting device is connected to the high temperature and high pressure test chamber by a worm gear reducer through a transmission shaft, a sprocket, a support seat, a chain, and a lifting lock. The other side of the chain is connected to the counterweight beam through a guide wheel. At the same time, the two sides of the counterweight beam are connected to the linear guide rail to form a lifting and lowering channel. The water-cooled loading shaft is provided with an internal water-cooling flow channel composed of two slender holes. The bottom is connected to the spherical end of the spherical universal joint through a thread. The concave ball end of the spherical universal joint is connected to the lower sample through the lower sample fixed chassis. The water-cooling jacket is composed of a water-cooling inner cavity and a water-cooling outer cavity, and is sealed by a sealing ring. The positioning of the water-cooling outer cavity is fixed by the cylindrical head of the hexagon socket screw, and the cooling water flows through the water-cooling joint. The high temperature and high pressure test chamber is fixedly connected by the cavity gland, the cavity inner cavity, the cavity chassis, and the winding pad through studs, hexagonal nuts, and gaskets. The cavity inner cavity has a cooling flow channel and an electric heater. The oil-cooled spindle is provided with an oil-cooling channel inside and a throttle tooth with a small gap outside. At the same time, the oil-cooled spindle, the sample loading part, and the sample loading part fixing plate are fixed by a locking nut. A high-pressure mechanical seal assembly is provided between the bearing chamber and the high-temperature and high-pressure test chamber. A baffle ring, a diagonal contact ball bearing, and multiple sets of lip seals are provided between the bearing chamber and the oil seal chamber.

[0057] Example

[0058] like Figures 1 to 9As shown, the present invention provides a disc-disc high-speed rotating friction and wear test device capable of simulating a high-temperature and high-pressure water medium working environment, comprising a lifting device 1 and a loading cylinder 2, both of which are fixed to the top of a test bench bracket 11. The piston rod of the loading cylinder 2 is connected to a tension sensor 3 and a water-cooled loading shaft 4, the top of a high-temperature and high-pressure test cavity 6 is connected to a water-cooled jacket 5, and the bottom is connected to a bearing cavity 7, the oil-cooled main shaft 704 is connected to a torque sensor 13 and a drive motor 10 through a coupling 9, the support 8 is fixed to the test bench bracket 11, and a shock-absorbing foot 12 is installed at the bottom of the test bench bracket, the gas control system 14 is connected to the loading cylinder 2, the oil station system 15 is connected to the bearing cavity and the oil-cooled main shaft 6, the high-pressure water station system 16 is connected to the high-temperature and high-pressure test cavity 6, and the data acquisition and control system 17 is electrically connected to the tension sensor 3, the temperature sensor 609, the torque sensor 13, the gas control system 14, the oil station system 15, and the high-pressure water station system 16.

[0059] The lifting device 1 in this embodiment includes a worm gear reduction device 106, which is connected to a sprocket 102 through a transmission shaft 101 and fixed to a support seat 103, and is connected to a high-temperature and high-pressure test chamber 6 through a chain 104 and a lifting lock 105. The other side of the chain 104 is connected to a counterweight beam 109 through a guide wheel 107. The counterweight beam 109 is lifted and slid on a linear guide rail 108, and the linear guide rail 108 is arranged on a test bench bracket 11, thereby realizing slow, stable and safe lifting and lowering of the high-temperature and high-pressure test chamber 6.

[0060] The water-cooling jacket 5 in this embodiment includes a water-cooling joint 501 welded on a water-cooling outer cavity 503, and the water-cooling outer cavity 503 is matched and installed with a water-cooling inner cavity 505, forming a water-cooling cavity 507 inside, and is sealed by an outer sealing ring 502, and axial positioning is achieved by a hexagon socket head screw 506. The inner side of the water-cooling inner cavity 505 is sealed with the water-cooling loading shaft 4 by an inner sealing ring 504. The water-cooling joint 501 is connected to the internal water-cooling cavity 507.

[0061] In this embodiment, an inner water-cooling channel 401 is provided in the water-cooling loading shaft 4, and the bottom of the water-cooling loading shaft 4 is connected to a spherical universal joint 402, whose contact surface is a convex and concave spherical surface match, and the convex spherical surface end is connected to the water-cooling loading rod.

[0062] The external cavity in the high temperature and high pressure test cavity is fixed by the cavity gland 614, the cavity body 615, and the cavity bottom plate 619 through studs 611, stud nuts 612, and gaskets 613. The cavity body 615 is respectively connected to the cavity gland 614 and the cavity bottom plate 619 by a wound gasket 601 to achieve the high temperature and high pressure sealing function. The electric heater 610 is inserted into the heating hole of the cavity body 615, and the temperature sensor 609 is installed in the cavity to contact the medium. The cavity body 615 is provided with a cooling channel 605, and the sample loading piece 606 is fixed on the sample loading piece fixing plate 617 and locked on the oil cooling main shaft 704 through a locking nut 616. The throttle tooth 618 is installed on the cavity bottom plate 619. The oil cooling main shaft is provided with an oil cooling channel inside, and a throttle tooth with a small gap is provided on the outside.

[0063] The concave spherical end of the spherical universal joint 402 is connected to the loading shaft connection plate 603, and the loading shaft connection plate 603 is connected to the lower sample fixing plate 608 through the connecting stud 604 and the connecting nut 602. The lower sample 607 is fixed on the lower sample fixing plate 608, so that the end faces of the lower sample 607 and the upper sample 606 can be self-adjusted and leveled when subjected to axial load. That is, when an axial load is applied, the axial load of the water-cooled loading shaft and the oil-cooled main shaft in a non-concentric state can be uniformly loaded, so that the end faces of the upper sample and the lower sample are automatically leveled, and the end faces are fully leveled.

[0064] The bearing chamber 7 in this embodiment includes a high-pressure mechanical seal 706, a deflector ring 701, a lip seal 702, and a pair of angular contact ball bearings 703. The rotating parts of the pair of angular contact ball bearings 703 are fixed on the oil-cooled main shaft 704, and the bottom is connected to the oil seal chamber 705.

[0065] For friction and wear tests, specifically:

[0066] a. The lifting device 1 works, the worm gear reducer 106 starts, and the drive shaft 101 drives the sprocket 102 to rotate; the sprocket 102 engages with the chain 104; under the action of the counterweight beam 109 and the guide wheel 107, the cavity body 615 and the cavity gland 614 are lifted;

[0067] b. Loading samples: the lower sample piece 607 is fixed on the lower sample piece fixing plate 608, the upper sample piece 606 is locked on the oil-cooled main shaft 704, the concave spherical end of the spherical universal joint 402 is connected to the loading shaft connecting plate 603, and the loading shaft connecting plate 603 is connected to the lower sample piece fixing plate 608 through the connecting stud 604 and the connecting nut 602, so that the end faces of the lower sample piece 607 and the upper sample piece 606 can be self-adjusted and leveled.

[0068] c. After the sample loading is completed, the cavity body 615 and the cavity pressure cover 614 slowly descend to the cavity bottom plate 619 under the action of the lifting device 1; at the same time, the cavity body 615, the cavity pressure cover 614 and the cavity bottom plate 619 are locked by the stud bolts 611, the stud nuts 612 and the gaskets 613.

[0069] d. The high-pressure water station system 16 provides flushing water for the high-pressure mechanical seal 706 and the cooling channel 605, and provides a water environment simulating the working pressure for the high-temperature and high-pressure test chamber 6. The water in the high-temperature and high-temperature test chamber 6 is heated by the electric heater 610 to simulate the working temperature, and the temperature is controlled by adjusting the flow of the cooling channel 605.

[0070] e. Supply water to the water-cooled jacket 5 and the inner water-cooled flow channel 401 of the water-cooled recording shaft 4 through the high-pressure water station system 16 to cool the water-cooled recording shaft 4 and reduce the influence of the high temperature of the high-temperature and high-pressure test chamber on the size and strength of the water-cooled loading shaft 4.

[0071] f. The start-up oil station system 15 supplies oil to the oil-cooling flow channel inside the oil-cooled main shaft 704, and isolates the high-temperature fluid in the high-temperature and high-pressure test chamber from affecting the performance and strength of the lower high-pressure mechanical seal through the throttle teeth with a small gap installed at the bottom of the high-temperature and high-pressure test chamber, thereby improving the safety and reliability of the setting.

[0072] g. The oil-cooled spindle 704 obtains a rotational speed by driving the motor 10, so that the test sample obtains a rotational speed; the gas control system 14 is started to control the piston of the loading cylinder 2 to move upward, and the cylinder piston drives the water-cooled loading shaft 4, and then an upward axial load is provided to the lower sample 607 through the loading shaft connecting plate 603 and the lower sample fixing plate 608 to ensure that the upper and lower samples fit together; the upper sample 606 and the lower sample 607 are subjected to a rotational friction and wear test under a high temperature and high pressure fluid lubrication environment.

[0073] h. During the test, the friction torque of the upper sample 606 and the lower sample 607 is obtained through the torque sensor 13, and then the friction coefficient is obtained through calculation. The data acquisition and control system 17 collects the sensor signals of the whole process and regulates the pressure, temperature, speed and load.

[0074] The device can achieve a water temperature range of 20~320℃, and accurately control the temperature through an electric heater and a cooling water jacket. The temperature fluctuation range does not exceed ±5℃ at high temperatures. The water pressure range is 0~15 MPa, and the control system is accurately adjusted. The pressure fluctuation range does not exceed ±0.3 MPa at high water pressure. The drive motor drives the upper sample to rotate through the main shaft, and the speed range can be obtained from 1 to 10000 r / min. The speed fluctuation range does not exceed ±1 r / min at high speed. The load is applied by the cylinder driving the loading shaft to lift the lower sample, and the load range can be obtained from 0 to 5000 N. The load floating range does not exceed ±2 N at high loads. The spherical universal joint can ensure that the upper and lower sample end faces are completely fitted and self-leveled.

[0075] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature and high pressure fluid lubrication rotating plane friction and wear testing device, comprising a test bench support (11), characterized in that: The test bench bracket (11) fixes the lifting device (1), the loading cylinder (2), the bearing chamber (7) and the driving motor (10) from top to bottom; the upper part of the high temperature and high pressure test chamber (6) in the device is connected to the water cooling jacket (5), and the lower part of the high temperature and high pressure test chamber (6) is connected to the bearing chamber (7); In the lifting device (1), the worm gear reduction device (106) drives the sprocket (102) via the transmission shaft (101), and the sprocket (102) engages with the chain (104); one end of the chain (104) is connected to the high-temperature and high-pressure test chamber (6) via the lifting lock (105), and the other end of the chain (104) is connected to the counterweight beam (109) after passing through the guide wheel (107); the sliders at both ends of the counterweight beam (109) act on the linear guide rail (108) to achieve the lifting and lowering of the high-temperature and high-pressure test chamber (6); The piston rod of the loading cylinder (2) is connected to a tension sensor (3) and a water-cooled loading shaft (4); the water-cooled loading shaft (4) passes through a water-cooled jacket (5) and is inserted into a high-temperature and high-pressure test chamber (6); a spherical universal joint (402) is arranged on the end thereof; the driving motor (10) is connected to one end of an oil-cooled main shaft (704) via a coupling (9); the other end of the oil-cooled main shaft (704) passes through a bearing chamber (7) and is arranged in the high-temperature and high-pressure test chamber (6); a torque sensor (13) is arranged on the coupling (9); In the high-temperature and high-pressure test chamber (6), the chamber cover (614), the chamber body (615), and the chamber bottom plate (619) surround an external chamber via studs (611) and stud nuts (612), and the interior of the external chamber is the test chamber; the sample loading piece (606) in the test chamber is fixed on the sample loading piece fixing plate (617), and the sample loading piece fixing plate (617) is locked on the oil-cooling spindle (704) via a locking nut (616); The lower sample piece (607) is fixed on the lower sample piece fixing plate (608), and the lower sample piece fixing plate (608) is connected to the loading shaft connecting plate (603) through a connecting stud (604) and a connecting nut (602); the loading shaft connecting plate (603) is connected to the spherical universal joint (402), and the end faces of the lower sample piece (607) and the upper sample piece (606) are self-adjusted and leveled when subjected to an axial load.

2. A high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 1, characterized in that: The contact surface of the spherical universal joint (402) is a convex and concave spherical surface match, the convex spherical surface end is connected to the water-cooled loading shaft (4), and the concave spherical surface end is connected to the lower sample (7). When an axial load is applied, the axial load of the water-cooled loading shaft (4) and the oil-cooled main shaft (704) is evenly loaded in a non-concentric state.

3. The high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 1, characterized in that: In the water-cooling jacket (5), a water-cooling cavity (507) is provided between the water-cooling outer cavity (503) and the water-cooling inner cavity (505), and the inner ring of the water-cooling inner cavity (505) cooperates with the water-cooling loading shaft (4).

4. A high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 3, characterized in that: An outer sealing ring (502) is arranged between the water-cooled outer cavity (503) and the water-cooled inner cavity (505), and an inner sealing ring (504) is arranged between the water-cooled inner cavity (505) and the water-cooled loading shaft (4).

5. The high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 3, characterized in that: A water cooling joint (501) is provided on the water cooling outer cavity (503), and the water cooling joint (501) is connected to the water cooling cavity (507).

6. The high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 1, characterized in that: An internal water cooling channel (401) is provided in the water-cooling loading shaft (4).

7. The high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 1, characterized in that: A wound gasket (601) is disposed between the cavity body (615) and the cavity pressure cover (614) and the cavity bottom plate (619), respectively; an electric heater (610) and a temperature sensor (609) are disposed on the external cavity; and a cooling channel (605) is disposed on the cavity body (615).

8. The high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 1, characterized in that: The bearing cavity (7) comprises a high-pressure mechanical seal (706), a baffle ring (701), a lip seal (702) and a paired angular contact ball bearing (703); the high-pressure mechanical seal (706) is arranged at the upper part of the bearing cavity (7), and the baffle ring (701) is arranged at the bottom of the high-pressure mechanical seal (706), adopting an overflow structure; the paired angular contact ball bearing (703) acts on the oil-cooled main shaft (704), and an oil sealing cavity (705) is arranged at the bottom of the paired angular contact ball bearing (703).

9. The high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 1, characterized in that: An oil cooling channel is arranged inside the oil cooling main shaft (704), and a throttling tooth (618) for isolating high-temperature fluid is arranged outside.

10. The high temperature and high pressure fluid lubrication rotating plane friction and wear testing device according to claim 1, characterized in that: The device is also provided with a gas control system (14), an oil station system (15), a high-pressure water station system (16), and a data acquisition and control system (17). The gas control system (14) is connected to the loading cylinder (2) and is used to control the loading cylinder (2); the oil station system (15) is connected to the bearing cavity (7), the high-pressure water station system (16) is connected to the high-temperature and high-pressure test cavity (6), and the data acquisition and control system (17) is electrically connected to the tension sensor (3), the temperature sensor (609), the torque sensor (13), the gas control system (14), the oil station system (15), and the high-pressure water station system (16).

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