Multifunctional valve-seat high temperature wear testing machine and test method

Abstract

The present invention discloses a multifunctional valve-seat high-temperature wear testing machine and testing method. The testing machine includes a first valve, a second valve, a first seat ring, a second seat ring, a transmission device, a load-applying device, a first heating device, and a second heating device. The first valve and the second valve are symmetrically arranged vertically, the first valve cooperates with the first seat ring, and the second valve cooperates with the second seat ring. The first valve and the second valve are respectively connected to the load-applying device, and the first and second seat rings are fixed to the load-applying device. The transmission device is used to drive the first and second valves in the same direction. The first heating device is used to heat the first valve, and the second heating device is used to heat the second valve. The present invention can study the wear performance of the valve-seat contact pair friction when sliding exists under high temperature and cyclic stress.

Description

Technical Field

[0001] The invention relates to a multifunctional valve-seat high-temperature wear testing machine and a testing method, and belongs to the field of friction and wear performance testing of valve-seat contact pairs. Background Art

[0002] The valve-seat contact pair is one of the most important contact pairs among the many contact pairs in the engine. It operates in a harsh working environment of high temperature, high stress and corrosive atmosphere, and is prone to wear and failure. This requires the valve-seat material to have excellent high-temperature wear resistance and corrosion resistance. Nickel-based high-temperature alloys have good high-temperature wear resistance and corrosion resistance, and can adapt to the harsh working environment of the valve-seat contact pair.

[0003] The continuous improvement of engine performance, particularly the application of supercharging and intensification technologies, has led to ever-increasing engine speeds, combustion chamber burst pressures, and valve operating temperatures. This has further deteriorated the valve-seat operating environment and increased wear. Friction and wear on the valve seat contact pair directly impacts the sealing properties of the combustion chamber, reducing engine output and impacting both performance and service life.

[0004] Existing valve-seat wear test equipment can only perform single high-temperature, high-frequency or high-stress impact tests, and cannot effectively distinguish the effects of burst pressure and impact on valve wear. It can only conduct micro-motion tests separately at a later stage to study the effect of burst pressure on wear, which increases the error of the results. Summary of the Invention

[0005] The purpose of the present invention is to provide a multifunctional valve-seat high temperature wear tester, which can study the wear performance of the valve-seat contact pair friction when sliding under high temperature and cyclic stress.

[0006] Another object of the present invention is to provide a valve-seat high-temperature wear test method, which is implemented based on the above-mentioned multifunctional valve-seat high-temperature wear tester.

[0007] The purpose of the present invention can be achieved by taking the following technical solutions:

[0008] A multifunctional valve-seat high-temperature wear testing machine includes a first valve, a second valve, a first seat ring, a second seat ring, a transmission device, a load-applying device, a first heating device, and a second heating device. The first valve and the second valve are symmetrically arranged up and down, the first valve cooperates with the first seat ring, and the second valve cooperates with the second seat ring. The first valve and the second valve are respectively connected to the load-applying device, the first seat ring and the second seat ring are fixed on the load-applying device, the transmission device is used to drive the first valve and the second valve to move in the same direction, the first heating device is used to heat the first valve, and the second heating device is used to heat the second valve.

[0009] Furthermore, the transmission device includes a drive motor, a coupling, a transmission shaft, a cam, a roller, a ball cap, a support frame, a strut, a top column and an elastic component. The drive motor is connected to the transmission shaft through a coupling, the cam is fixed on the transmission shaft, the roller is located at the upper end of the cam and contacts the cam, the support frame is connected to the roller shaft of the roller, and the upper end of the support frame is connected to the lower end of the strut through an elastic component, the upper end of the strut is connected to the lower end of the top column, the first valve is arranged at the upper end of the top column, the ball cap is arranged on the valve stem of the second valve, and the ball cap is located at the lower end of the cam and contacts the cam.

[0010] Furthermore, the elastic component includes a first spring disk, a second spring disk and a buffer spring. The first spring disk and the second spring disk are arranged up and down. The first spring disk is connected to the lower end of the support rod, and the second spring disk is connected to the upper end of the support frame. The buffer spring is arranged between the first spring disk and the second spring disk.

[0011] Furthermore, a rectangular groove is provided on the surface of the roller, and the rectangular groove wraps the cam. An arc-shaped groove is provided on the outer circle of the cam, and the arc-shaped groove cooperates with the ball in the ball cap.

[0012] Furthermore, a force sensor is provided in the middle of the support rod.

[0013] Furthermore, the load-applying device includes a slide bar, a first plate, a second plate, a first cylinder, a second cylinder, a first clamp, and a second clamp, wherein the slide bars are four in number, and the first plate and the second plate are arranged vertically;

[0014] The four corners of the first plate are respectively connected to four sliding rods, the center of the first plate is connected to the first cylinder body, the first fixture is connected to the first cylinder body, the first seat ring is embedded in the first fixture, the upper end of the first valve is connected to a baffle via a spring, the two ends of the baffle are respectively connected to two guide rods, the baffle can move up and down along the guide rods, the guide rods are fixed to the first plate, a first sleeve is provided at the lower end of the side of the valve stem of the first valve, and the first sleeve is connected to the first cylinder body;

[0015] The four corners of the second plate are respectively connected to four sliding rods, the center position of the second plate is connected to the second cylinder body, the second clamp is connected to the second cylinder body, the second seat ring is embedded in the second clamp, a return spring is provided at the upper end of the side of the valve stem of the second valve, a second sleeve is provided at the lower end of the side of the valve stem of the second valve, and the second sleeve is connected to the second cylinder body.

[0016] Furthermore, the load loading device also includes a first cooling pipe and a second cooling pipe. The first cooling pipe is arranged on the outer ring of the first cylinder body to surround the first cylinder body, and the second cooling pipe is arranged on the outer ring of the second cylinder body to surround the second cylinder body.

[0017] Furthermore, the first heating device includes a first heating coil and a first temperature sensor, wherein the first heating coil surrounds the neck of the first valve and is close to the first seat ring, and the first temperature sensor is arranged at the bottom of the first valve to detect the temperature of the first valve;

[0018] The second heating device includes a second heating coil and a second temperature sensor. The second heating coil surrounds the neck of the second valve and is close to the second seat ring. The second temperature sensor is arranged on the inner ring of the second seat ring to detect the temperature of the second seat ring.

[0019] Furthermore, it also includes a first rotating device and a second rotating device;

[0020] The first rotating device is arranged on the side of the valve stem of the first valve and contacts the valve stem of the first valve;

[0021] The second rotating device is arranged on the side of the valve stem of the second valve and contacts the valve stem of the second valve.

[0022] Another object of the present invention can be achieved by adopting the following technical solutions:

[0023] A valve-seat high-temperature wear test method is implemented based on the multifunctional valve-seat high-temperature wear tester described above, and the method comprises:

[0024] The driving motor of the transmission device transmits power horizontally to the cam through the coupling and the transmission shaft, driving the cam to rotate, causing the support frame to rise, thereby pushing the support rod to rise, and the first valve impacts the first seat ring under the drive of the top column; when the impact end of the first seat ring contacts the first seat ring, the cam pushes the support frame upward to cause the elastic component to begin to contract, and the impact end of the first valve further applies pressure to the first seat ring under the push of the elastic component, thereby achieving a single impact and pressure loading; when the impact is completed, the support rod descends, and the first valve moves downward with the support rod, and the cam rotates cyclically to cause the first valve to cyclically impact the first seat ring;

[0025] When the cam rotates, it pushes the ball cap and the second valve to move, causing the second valve to break contact with the second seat ring. As the cam continues to rotate, the second valve returns to its original position and then re-contacts and collides with the second seat ring.

[0026] During the process of the first valve impacting the first seat ring and the second valve impacting the second seat ring, the impact end of the first valve is heated by the first heating device, and the impact end of the second valve is heated by the second heating device.

[0027] The present invention has the following beneficial effects compared to the prior art:

[0028] 1. The present invention adopts a symmetrical dual-valve testing mechanism. The first valve and the first seat ring can achieve impact wear under high temperature, high-frequency impact, and high explosion pressure conditions. The second valve and the second seat ring can achieve impact wear under high temperature and high-frequency impact conditions. Compared with the second valve and the second seat ring contact pair, the first valve and the first seat ring have explosion pressure. The two groups of valve-seat ring contact pair tests can study the influence of explosion pressure on the wear performance of the valve-seat ring contact pair under a single variable condition, reduce test errors, and shorten the test cycle.

[0029] 2. The present invention uses rollers and ball caps symmetrically distributed at the upper and lower ends of the cam to transmit power. At the same time, the outermost circular contour of the cam and the arc-shaped groove contour are in equal proportion to ensure that the stroke and movement process of the first valve and the first seat ring, the second valve and the second seat ring are consistent.

[0030] 3. The present invention adopts a structure of cam and elastic component for loading, which can take advantage of the small strain and high stress characteristics of the elastic component to exert a large force on the impact end of the first valve, thereby realizing a rapid wear test. Compared with the hydraulic loading device, the mechanical loading structure is simple and reliable, the parts are highly reliable, and they are easy to replace after a failure. Therefore, it has the advantages of high reliability and long service life, and can perform long-term testing on the valve seat ring.

[0031] 4. The present invention adopts a rotating device to control the rotation phenomenon of the valve seat during contact friction. Under the same other test conditions, the influence of valve rotation on the wear performance of the valve-seat contact pair can be studied.

[0032] 5. The present invention can independently control the three test conditions of valve rotation, temperature, and explosion pressure, realize the combined changes of various variables, and study their effects on the wear performance of the valve seat contact pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0034] Figure 1 Schematic diagram of the structure of a multifunctional valve-seat high-temperature wear testing machine according to an embodiment of the present invention.

[0035] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0036] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0037] Figure 4 for Figure 1 Enlarged view of point C in the middle.

[0038] Among them, 1-first valve, 2-second valve, 3-first seat ring, 4-second seat ring, 5-drive motor, 6-coupling, 7-cam, 8-roller, 9-ball cap, 10-support frame, 11-support rod, 12-top column, 13-elastic component, 1301-first spring disk, 1302-second spring disk, 1303-buffer spring, 14-force sensor, 15-sliding rod, 16-first plate, 17-second plate, 18-first cylinder, 19-first Second cylinder body, 20-first clamp, 21-second clamp, 22-spring, 23-baffle, 24-guide rod, 25-first sleeve, 26-return spring, 27-second sleeve, 28-first cooling pipe, 29-second cooling pipe, 30-pillar, 31-base plate, 32-third flat plate, 33-first heating coil, 34-first temperature sensor, 35-second heating coil, 36-second temperature sensor, 37-first rotating device, 38-second rotating device. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] Example:

[0041] like Figures 1 to 4As shown, this embodiment provides a multifunctional valve-seat high-temperature wear testing machine, which includes a first valve 1, a second valve 2, a first seat ring 3, a second seat ring 4, a transmission device, a load loading device, a first heating device and a second heating device. The first valve 1 and the second valve 2 are symmetrically arranged up and down, the first valve 1 cooperates with the first seat ring 3, and the second valve 2 cooperates with the second seat ring 4. The first valve 1 and the second valve 2 are respectively connected to the load loading device, the first seat ring 3 and the second seat ring 4 are fixed on the load loading device, the transmission device is used to drive the first valve 1 and the second valve 2 to move in the same direction, the first heating device is used to heat the first valve 1, and the second heating device is used to heat the second valve 2.

[0042] In this embodiment, the transmission device includes a drive motor 5, a coupling 6, a transmission shaft, a cam 7, a roller 8, a ball cap 9, a support frame 10, a strut 11, a top column 12 and an elastic component 13. The drive motor 5 is connected to the transmission shaft through the coupling 6, and the cam 7 is fixed on the transmission shaft. The drive motor 5 transmits power horizontally to the cam 7 through the coupling 6 and the transmission shaft. The cam 7 is an eccentric wheel; the roller 8 is located at the upper end of the cam 7 and contacts with the cam 7 for power transmission. The support frame 10 is connected to the roller shaft of the roller 8 and is arranged in a Y shape. The upper end of the support frame 10 is connected to the lower end of the strut 11 through the elastic component 13. The upper end of the strut 11 is connected to the lower end of the top column 12. The first valve 1 is arranged at the upper end of the top column 12, and the ball cap 9 is arranged on the valve stem of the second valve 2. The ball cap 9 is located at the lower end of the cam 7 and contacts with the cam 7 for power transmission.

[0043] Furthermore, the elastic component 13 has a buffering function to prevent excessive impact force from damaging the testing machine. It includes a first spring disk 1301, a second spring disk 1302 and a buffer spring 1303. The first spring disk 1301 and the second spring disk 1302 are arranged up and down. The first spring disk 1301 is connected to the lower end of the support rod 11, specifically through a thread. The second spring disk 1302 is connected to the upper end of the support frame 10, specifically through a thread. There are two buffer springs 1303, and the two buffer springs 1303 are arranged on the left and right sides between the first spring disk 1301 and the second spring disk 1302.

[0044] Furthermore, a rectangular groove is provided on the surface of the roller 8, which wraps the cam 7 and limits the cam 7 to prevent the contact pair of the cam 7 and the roller 8 from falling off. An arc-shaped groove is provided on the outer circle of the cam 7, which cooperates with the ball in the ball cap 9 to reduce the wear between the cam 7 and the top of the valve stem of the second valve 2, and at the same time limits the contact pair of the cam 7 and the ball cap 9 to prevent the matching pair from falling off. The outermost circle contour of the cam 7 and the arc-shaped groove contour are in equal proportion to ensure that the stroke and movement process of the first valve 1 and the first seat ring 3, the second valve 2 and the second seat ring 4 are consistent; specifically, the height difference between the highest point and the lowest point of the outermost circle contour of the cam 7 and the arc-shaped groove is greater than the distance between the impact end and the first valve and the first seat ring.

[0045] Furthermore, the top column 12 is connected to the support rod 11 by bolts and can be freely disassembled to facilitate the installation of the first valve, thereby reducing the overall size of the testing machine.

[0046] Furthermore, a force sensor 14 is provided in the middle of the support rod 11. The force sensor 14 is a digital force sensor that can monitor the change of the test force in real time.

[0047] In this embodiment, the load loading device includes a slide bar 15, a first plate 16, a second plate 17, a first cylinder 18, a second cylinder 19, a first clamp 20 and a second clamp 21. There are four slide bars 15, and the first plate 16 and the second plate 17 are arranged up and down.

[0048] The four corners of the first flat plate 16 are respectively connected to the four sliding rods 15, and the center position of the first flat plate 16 is connected to the first cylinder body 18, specifically, it can be connected to the first cylinder body 18 by bolts. The first clamp 20 is connected to the first cylinder body 18, and the first seat ring 3 is embedded in the first clamp 20. The upper end of the first valve 1 is connected to the baffle 23 through a spring 22, and the two ends of the baffle 23 are respectively connected to two guide rods 24. The two ends of the baffle 23 have holes. By connecting with the guide rods 24, the baffle 23 can move up and down along the guide rods 24, and the guide rods 24 are fixed on the first flat plate 16. A first sleeve 25 is provided at the lower end of the side of the valve stem of the first valve 1, and the first sleeve 25 is connected to the first cylinder body 18.

[0049] The four corners of the second flat plate 17 are respectively connected to the four sliding rods 15, and the center position of the second flat plate 17 is connected to the second cylinder body 19, specifically, it can be connected to the second cylinder body 19 by bolts. The second clamp 21 is connected to the second cylinder body 19, and the second seat ring 4 is embedded in the second clamp 21. A return spring 26 is provided at the upper end of the side of the valve stem of the second valve 2, and a second sleeve 27 is provided at the lower end of the side of the valve stem of the second valve 2. The second sleeve 27 is connected to the second cylinder body 19.

[0050] Furthermore, the load loading device also includes a first cooling pipe 28 and a second cooling pipe 29. The first cooling pipe 28 is arranged on the outer ring of the first cylinder 18 to surround the first cylinder 18, and the second cooling pipe 29 is arranged on the outer ring of the second cylinder 19 to surround the second cylinder 19.

[0051] In order to fix the sliding rod 15, the load loading device also includes pillars 30 and a base plate 31. There are four pillars 30, and the four sliding rods 15 correspond to the four pillars 30 one by one. Each sliding rod 15 is fixed to the upper end of the corresponding pillar 30, and the lower ends of the four pillars 30 are fixed to the base plate 31.

[0052] In order to improve the stability of the slide rod 15 , the load loading device further includes a third plate 32 . The third plate 32 is disposed between the first plate 16 and the second plate 17 , and the four corners of the third plate 32 are respectively connected to the four slide rods 15 .

[0053] Furthermore, the first heating device includes a first heating coil 33 and a first temperature sensor 34. The first heating coil surrounds the neck of the first valve 1 and is close to the first seat ring 3. The first temperature sensor 34 is arranged at the bottom of the first valve 1 to detect the temperature of the first valve 1.

[0054] Furthermore, the second heating device includes a second heating coil 35 and a second temperature sensor 36. The second heating coil 35 surrounds the neck of the second valve 2 and is close to the second seat ring 4. The second temperature sensor 36 is arranged on the inner ring of the second seat ring 4 to detect the temperature of the second seat ring 4.

[0055] Furthermore, the multifunctional valve-seat high-temperature wear testing machine of this embodiment also includes a first rotating device 37 and a second rotating device 38. The first rotating device 37 is arranged on the side of the valve stem of the first valve 1 and contacts the valve stem of the first valve 1, and can control the rotation phenomenon when the first valve 1 is in contact and friction with the first seat ring 3; the second rotating device 38 is arranged on the side of the valve stem of the second valve 2 and contacts the valve stem of the second valve 2, and can control the rotation phenomenon when the second valve 2 is in contact and friction with the second seat ring 4.

[0056] The working process and working principle of the multifunctional valve-seat high temperature wear testing machine of this embodiment are as follows:

[0057] Before use, disassemble the ejector post, install the first seat ring and the first clamp, then install the first valve, and finally install the ejector post. At the same time, install the second valve, the second seat ring and the second clamp, and fasten the roller cap to the top of the valve stem of the second valve;

[0058] The driving motor drives the cam to rotate, which drives the cam to rotate, causing the support frame to rise, thereby pushing the support rod to rise, and the first valve is driven by the top column to impact the seat ring. Since the height difference between the highest point and the lowest point of the cam is greater than the distance between the impact end of the first valve and the first seat ring, when the impact end of the first valve contacts the first seat ring, the cam can still push the support frame upward to cause the buffer spring of the elastic component to begin to shrink. The impact end of the first valve further applies pressure to the first valve and the first seat ring under the push of the elastic component, thereby achieving a one-time impact and pressure loading. When the impact is completed, the support rod drops, and the first valve also moves downward. The cam rotates cyclically to cause the first valve to impact the first seat ring cyclically according to the above process.

[0059] When the cam rotates, it pushes the ball cap and the second valve to move, causing the second valve to disengage from the second seat ring. As the cam continues to rotate, the second valve is reset under the action of the return spring, and then re-contacts and collides with the second seat ring. Since the impact contact between the second valve and the second seat ring is only under the action of the return spring, there is only impact between the second valve and the second seat ring, but no explosion pressure.

[0060] During the first valve impacting the first seat ring and the second valve impacting the second seat ring, two heating coils and two cooling tubes operate simultaneously. The heating coil heats the impact tip of the valve, making the valve impact more similar to actual conditions and ensuring more accurate test results. The cooling tube cools the cylinder block to prevent heat transfer to other parts and thus affect the performance of other equipment mechanisms, ensuring test safety. The first rotating device is installed on the valve stem of the first valve, and the second rotating device is installed on the valve stem of the second valve, respectively controlling the rotation of the first and second valves. During the experiment, the valve rotation conditions can be changed by controlling factors such as temperature and load to study the impact of valve rotation on the wear performance of the valve-seat contact pair. The symmetrical dual valve-seat test structure can maximize the control of test variables, increasing the comparability and reliability of experimental results.

[0061] In the description of the present invention, it should be noted that, unless otherwise expressly specified or agreed upon, the terms "setting", "installation", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The terms "upper", "lower", "left", "right", and similar expressions used are for illustrative purposes only and do not represent the only implementation method.

[0062] To sum up, the present invention adopts a symmetrical dual-valve testing mechanism, the first valve and the first seat ring can achieve impact wear under high temperature, high frequency impact and high explosion pressure conditions, and the second valve and the second seat ring can achieve impact wear under high temperature and high frequency impact conditions. Compared with the second valve and the second seat ring contact pair, the first valve and the first seat ring have explosion pressure. The two groups of valve-seat ring contact pair tests can study the influence of explosion pressure on the wear performance of the valve-seat ring contact pair under a single variable condition, reduce test errors, and shorten the test cycle.

[0063] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the scope disclosed by the present invention, which falls within the scope of protection of the present invention.

Claims

1. A multifunctional valve-seat high temperature wear testing machine, characterized in that: The invention comprises a first valve, a second valve, a first seat ring, a second seat ring, a transmission device, a load-applying device, a first heating device, and a second heating device, wherein the first valve and the second valve are symmetrically arranged in an upper and lower direction, the first valve cooperates with the first seat ring, the second valve cooperates with the second seat ring, the first valve and the second valve are respectively connected to the load-applying device, the first seat ring and the second seat ring are fixed on the load-applying device, the transmission device is used to drive the first valve and the second valve to move in the same direction, the first heating device is used to heat the first valve, and the second heating device is used to heat the second valve; The transmission device includes a driving motor, a coupling, a transmission shaft, a cam, a roller, a rolling ball cap, a support frame, a strut, a top column and an elastic component, wherein the driving motor is connected to the transmission shaft through a coupling, the cam is fixed on the transmission shaft, the roller is located at the upper end of the cam and contacts the cam, the support frame is connected to the roller shaft of the roller, and the upper end of the support frame is connected to the lower end of the strut through an elastic component, the upper end of the strut is connected to the lower end of the top column, the first valve is arranged at the upper end of the top column, the rolling ball cap is arranged on the valve stem of the second valve, the rolling ball cap is located at the lower end of the cam and contacts the cam; The elastic component includes a first spring disk, a second spring disk and a buffer spring, the first spring disk and the second spring disk are arranged up and down, the first spring disk is connected to the lower end of the support rod, and the second spring disk is connected to the upper end of the support frame, and the buffer spring is arranged between the first spring disk and the second spring disk; the surface of the roller is provided with a rectangular groove, the rectangular groove wraps the cam, the outer circle of the cam is provided with an arc groove, and the arc groove cooperates with the rolling ball in the rolling ball cap; The load loading device includes a sliding rod, a first plate, a second plate, a first cylinder body, a second cylinder body, a first clamp and a second clamp, the sliding rods are four, and the first plate and the second plate are arranged up and down; the four corners of the first plate are respectively connected to the four sliding rods, the center position of the first plate is connected to the first cylinder body, the first clamp is connected to the first cylinder body, the first seat ring is embedded in the first clamp, the upper end of the first valve is connected to a baffle by a spring, the two ends of the baffle are respectively connected to two guide rods, and the baffle can move up and down along the guide rod, the guide rod is fixed on the first plate, a first sleeve is provided at the lower end of the side of the valve stem of the first valve, the first sleeve is connected to the first cylinder body; the four corners of the second plate are respectively connected to the four sliding rods, the center position of the second plate is connected to the second cylinder body, the second clamp is connected to the second cylinder body, the second seat ring is embedded in the second clamp, the upper end of the side of the valve stem of the second valve is provided with a return spring, the lower end of the side of the valve stem of the second valve is provided with a second sleeve, and the second sleeve is connected to the second cylinder body.

2. The multifunctional valve-seat high temperature wear testing machine according to claim 1, characterized in that: A force sensor is provided at the middle of the strut.

3. The multifunctional valve-seat high temperature wear testing machine according to any one of claims 1 to 2, characterized in that: The load loading device further includes a first cooling pipe and a second cooling pipe. The first cooling pipe is arranged on the outer ring of the first cylinder body to surround the first cylinder body, and the second cooling pipe is arranged on the outer ring of the second cylinder body to surround the second cylinder body.

4. The multifunctional valve-seat high temperature wear testing machine according to any one of claims 1 to 2, characterized in that: The first heating device includes a first heating coil and a first temperature sensor, wherein the first heating coil surrounds the neck of the first valve and is close to the first seat ring, and the first temperature sensor is arranged at the bottom of the first valve to detect the temperature of the first valve; The second heating device includes a second heating coil and a second temperature sensor. The second heating coil surrounds the neck of the second valve and is close to the second seat ring. The second temperature sensor is arranged on the inner ring of the second seat ring to detect the temperature of the second seat ring.

5. The multifunctional valve-seat high temperature wear testing machine according to any one of claims 1 to 2, characterized in that: Also includes a first rotating device and a second rotating device; The first rotating device is arranged on the side of the valve stem of the first valve and contacts the valve stem of the first valve; The second rotating device is arranged on the side of the valve stem of the second valve and contacts the valve stem of the second valve.

6. A valve-seat high-temperature wear test method, implemented based on the multifunctional valve-seat high-temperature wear tester according to any one of claims 1 to 5, characterized in that: The method comprises: The driving motor of the transmission device transmits power horizontally to the cam through the coupling and the transmission shaft, driving the cam to rotate, causing the support frame to rise, thereby pushing the support rod to rise, and the first valve impacts the first seat ring under the drive of the top column; when the impact end of the first seat ring contacts the first seat ring, the cam pushes the support frame upward to cause the elastic component to begin to contract, and the impact end of the first valve further applies pressure to the first seat ring under the push of the elastic component, thereby achieving a single impact and pressure loading; when the impact is completed, the support rod descends, and the first valve moves downward with the support rod, and the cam rotates cyclically to cause the first valve to cyclically impact the first seat ring; When the cam rotates, it pushes the ball cap and the second valve to move, causing the second valve to break contact with the second seat ring. As the cam continues to rotate, the second valve returns to its original position and then re-contacts and collides with the second seat ring. During the process of the first valve impacting the first seat ring and the second valve impacting the second seat ring, the impact end of the first valve is heated by the first heating device, and the impact end of the second valve is heated by the second heating device.

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