Impact mode adjustable valve impact wear test bench

Abstract

The application discloses an impact mode adjustable valve impact wear test bench, which comprises a fixed support plate, a bench support rod and a bench adjusting support rod, a valve fixing table is arranged above the bench support rod and the bench adjusting support rod, a motor is arranged on the fixed support plate, an output end of the motor is connected with a shafting, the shafting is connected with a pushing rod mechanism which is vertically arranged above the shafting, a top of the pushing rod mechanism is in contact with a valve which is arranged in the valve fixing table, a pushing rod fixing mechanism is further arranged between the pushing rod mechanism and the valve, positions of the pushing rod fixing mechanism and the valve fixing table are adjusted through the bench adjusting support rod, clamping mechanisms are arranged on the valve fixing table and the pushing rod fixing mechanism, and a heating device is arranged on a top of the valve fixing table. The application can effectively simulate different engine valve impact wear forms, so as to verify whether the valve is reasonably designed.

Description

Technical Field

[0001] This invention relates to a valve test bench, specifically a valve impact wear test bench with adjustable impact mode, belonging to the field of valve processing technology. Background Technology

[0002] The valve is one of the most important components in the engine's valve train. During normal engine operation, it controls the entry and exit of high-pressure air or high-temperature exhaust gas through periodic opening and closing. At the moment the valve closes, the high impact load and temperature often cause wear on the valve cone surface, and may even lead to valve cracking or failure.

[0003] High temperatures alter the material properties of valves, while the cam determines the valve's impact motion. Previous testing devices could only perform valve impact wear tests at a specific temperature and with a specific cam; however, the valve temperature and the corresponding cam differ for valves in different engines. The ability to easily change the temperature and cam will effectively simulate the valve impact wear patterns of different engines to verify the rationality of the valve design; it will also facilitate testing the suitable temperature, speed, and acceleration for impact wear of different valve materials, adapting to different engine models. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by proposing a valve impact wear test bench with a reasonable structure and convenient use, which can effectively simulate different valve impact wear patterns to verify whether the valve design is reasonable.

[0005] To achieve the above objectives, the specific technical solution of the present invention is as follows: a valve impact wear test bench with adjustable impact mode, comprising a test bench body and a test device mounted on the test bench body;

[0006] The frame body includes a fixed support plate at the bottom and a frame support rod and a frame adjustment support rod vertically installed above one side of the fixed support plate. A valve fixing platform is installed above the frame support rod and the frame adjustment support rod.

[0007] The test apparatus includes an electric motor mounted on the other side of the fixed support plate. The output end of the electric motor is connected to a shaft system located below the valve mounting platform and parallel to the fixed support plate. The electric motor drives the shaft system to rotate. The shaft system is connected to a push rod mechanism vertically mounted above it via a cam block. The top of the push rod mechanism contacts the valve mounted in the valve mounting platform. A push rod fixing mechanism is also provided between the push rod mechanism and the valve. The left and right ends of the push rod fixing mechanism are respectively fitted onto the frame support rod and the frame adjusting support rod. The positions of the push rod fixing mechanism and the valve mounting platform are adjusted by the frame adjusting support rod.

[0008] There are four clamping mechanisms in total. Three of them are installed on the valve mounting platform and the other is installed on the push rod fixing mechanism. After adjusting the positions of the valve mounting platform and the push rod fixing mechanism, the clamping mechanisms are used to fix the two in place.

[0009] A heating device is installed on the top of the valve mounting plate.

[0010] Furthermore, the shaft system includes a keyed right shaft and a left shaft, the ends of which are fixed by shaft support seats symmetrically arranged on a fixed support plate; wherein, the right shaft is a hollow keyed stepped shaft, the main function of which is to connect the left shaft, the cam block and the motor. One end of the right shaft is connected to the left shaft after the cam block is installed, and the other end is connected to the output end of the motor.

[0011] Furthermore, the left shaft includes a left shaft sleeve, a left shaft sliding rod, a left shaft locking sleeve, a left shaft adjusting bolt, a left shaft fixing flange, a left shaft rotating flange, a left shaft rotating handle, and a left shaft adjusting bolt rotating handle;

[0012] The left shaft sleeve is the main body of the left shaft and is used to fix the various components of the left shaft. The left shaft rotating flange is located at the left end of the left shaft and is bolted to the left shaft sleeve to restrict the movement of the left shaft adjusting bolt along the axial direction. The outer ring of the left shaft adjusting bolt is engaged with the inner ring of the left shaft sliding rod. Guided by the left shaft sleeve, the left shaft adjusting bolt is rotated by the left shaft adjusting bolt rotating handle installed on the outside of the left shaft rotating flange, causing the left shaft sliding rod to move back and forth, thereby realizing the key connection with the right shaft and pressing the cam block. The top of the left shaft adjusting bolt rotating handle is also equipped with a left shaft fixing cover for fixing its position. The left shaft rotating handle is fixed on the left shaft rotating flange, thereby adjusting the left shaft and achieving alignment with the right shaft.

[0013] The right end of the left shaft sleeve is fixedly mounted with a left shaft fixing flange by bolts to limit the movement range of the left shaft sliding rod; the left shaft locking sleeve is located outside the left shaft adjusting bolt, and a left shaft locking bolt is also installed outside the left shaft locking sleeve. When the left shaft locking bolt is tightened, the left shaft locking sleeve is pressed tightly against the left shaft adjusting bolt, thereby fixing the position of the left shaft sliding rod; otherwise, the position of the left shaft sliding rod can be adjusted.

[0014] Furthermore, the cam block is connected between the left and right shafts and pressed together by them. The cam block is sleeved on the right shaft, and its profile surface is always in contact with the push rod mechanism. The rotation of the cam drives the push rod mechanism to move up and down.

[0015] Furthermore, the push rod mechanism consists of a rod body and a roller mounted on top of the rod body. The bottom end face of the roller contacts the cam block. The mating surface between the rod body and the push rod fixing mechanism is elliptical to prevent axial rotation of the rod body.

[0016] Furthermore, the push rod fixing mechanism includes a fixing rod body with annular connectors at both ends, and an elliptical mounting hole for the push rod to pass through at the center of the fixing rod body; the left end of the push rod fixing mechanism is provided with a rotatable ring with an inner helix, which is threadedly engaged with the adjustable support rod of the platform, and the position of the push rod fixing mechanism can be controlled by rotating the rotatable ring alone; the right end of the push rod fixing mechanism is a clamping mechanism, which is used to fix the position of the push rod fixing mechanism after it has been adjusted.

[0017] A laser displacement sensor for measuring valve lift during bench operation is installed 10cm from the axis on the fixed rod body. This installation distance was determined by technicians after extensive testing; only by installing it at a distance of 10cm can the instantaneous displacement of the moving parts be accurately measured, thus achieving the technical effect of this application.

[0018] Furthermore, the four clamping mechanisms have the same structure, each with an elastic metal ring with a notch installed inside. The notch is perpendicular to the screwing-in and screwing-out direction of the fastening bolt, so that the elastic metal ring can easily deform under the squeezing action of the fastening bolt and press tightly against the support rod of the frame, thereby achieving the fixation of the clamping mechanism.

[0019] Furthermore, the valve mounting platform consists of a valve mounting plate and a valve mounting body connected by bolts. The valve mounting plate has four symmetrically arranged holes on its circumference for mounting the adjusting support rod and the support rod. After passing through the corresponding holes, the adjusting support rod and the support rod can be adjusted in position by the valve mounting platform adjusting ring to adjust the longitudinal movement of the valve mounting platform. After adjustment, it is fixed by a clamping mechanism, which, together with the valve mounting platform adjusting ring, occupies the four holes at the same radius on the mounting platform. The valve mounting body has a fixing position at its center for mounting valve components.

[0020] Furthermore, the heating device is equipped with an infrared temperature measuring instrument for real-time monitoring of valve temperature.

[0021] Furthermore, the frame adjustment support rod includes a threaded rod body. The bottom of the rod body is mounted on a fixed support plate via a mounting seat, and the top is provided with a frame adjustment support rod handle for adjusting the position of the valve fixing platform and the push rod fixing mechanism. The rod body and the valve fixing platform and the push rod fixing mechanism are respectively connected by threads through the valve fixing platform adjustment ring with an inner ring helix and the push rod fixing mechanism adjustment ring.

[0022] The support rods of the platform consist of three rods, which are symmetrically mounted on the fixed support plate via mounting bases at the bottom.

[0023] The key advancements of this invention compared to existing technologies are as follows:

[0024] (1) The test bench uses precise temperature measuring elements and temperature control devices, which can accurately heat the valve to any temperature in the range of 300K~1200K, making it convenient to test the valve impact wear at different temperatures.

[0025] (2) The test bench utilizes a special mechanism on the left shaft to enable simple installation and removal of the cam, making it easier to test the impact of different speeds and accelerations on the valve under the influence of different cams.

[0026] (3) The structure of the valve mounting platform makes the fixed valve, valve seat, valve guide rod and spring the same as the original engine in terms of matching method, which can better simulate the actual impact state of the valve. Attached Figure Description

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention.

[0029] Figure 2 This is a cross-sectional view of the present invention.

[0030] Figure 3 This is a cross-sectional view of the push rod fixing mechanism and the clamping mechanism thereon of the present invention.

[0031] Figure Descriptions: 1-Motor, 2-Fixed Support Plate, 3-Right Shaft, 4-Left Shaft, 5-Shaft Support Seat, 6-Cam Block, 7-Frame Support Rod, 8-Frame Adjustment Support Rod, 9-Push Rod Mechanism, 10-Valve Fixing Platform, 11-Heating Device, 12-Push Rod Fixing Mechanism, 13-Clamping Mechanism, 14-Left Shaft Sleeve, 15-Left Shaft Sliding Rod, 16-Left Shaft Locking Sleeve, 17-Left Shaft Adjusting Bolt, 18-Left Shaft Fixing Plate, 19-Left Shaft Rotating Flange, 20-Left Shaft Rotating Handle Hand, 21-Left shaft adjusting bolt rotating handle, 22-Left shaft fixing cover, 23-Left shaft locking bolt, 24-Roller, 25-Valve, 26-Valve fixing platform adjusting ring, 27-Push rod fixing mechanism adjusting ring, 28-Rotating platform adjusting handle, 29-Valve fixing platform, 30-Valve fixing platform body, 31-Valve seat, 32-Valve guide rod, 33-Spring, 34-Temperature measuring instrument, 35-Rotable ring, 36-Laser displacement sensor, 37-Elastic metal ring, 38-Fasting bolt. Detailed Implementation

[0032] This embodiment provides a valve impact wear test bench with adjustable impact mode, such as... Figure 1 As shown, it consists of several parts, including motor 1, fixed support plate 2, right shaft 3, left shaft 4, shaft support seat 5, cam 6, frame support rod 7, frame adjustment support rod 8, push rod mechanism 9, valve fixing platform 10, heating device 11, push rod fixing mechanism 12, and clamping mechanism 13.

[0033] like Figure 2 As shown, the left shaft 4 is composed of several parts, including a left shaft sleeve 14, a left shaft sliding rod 15, a left shaft locking sleeve 16, a left shaft adjusting bolt 17, a left shaft fixing flange 18, a left shaft rotating flange 19, a left shaft rotating handle 20, a left shaft adjusting bolt rotating handle 21, a left shaft fixing cover 22, and a left shaft locking bolt 23. The inner ring of the left shaft sliding rod 15 mates with the outer ring of the left shaft adjusting bolt 17. Guided by the left shaft sleeve 14, the left shaft sliding rod 15 can be moved back and forth by rotating the left shaft adjusting bolt 17, facilitating the replacement or clamping of the cam 6.

[0034] like Figure 1 As shown, the camshaft 6 is always pressed by the right shaft 3 and the left shaft 4 during normal operation of the test bench, and the cam 6 profile is always in contact with the push rod mechanism 9, that is, the rotation of the cam 6 drives the push rod mechanism 9 to move up and down.

[0035] like Figure 2 As shown, the push rod 9 has a roller 24 at its lower part that contacts the cam, and an upper part that contacts the valve 25. This effectively transmits the opening and closing force caused by the cam 6 to the valve 24, while avoiding the transmission of shear stress generated by the rotation of the cam 6 to the valve 25. The mating surface between the push rod mechanism 9 and the push rod fixing mechanism 12 is elliptical, which prevents the roller 24 from being misaligned relative to the cam 6 and facilitates lubrication of the push rod mechanism 9 and the push rod fixing mechanism 12.

[0036] like Figure 2 As shown, the platform adjustment support rod 8 is connected to the valve fixing platform 10 and the push rod fixing mechanism 12 through the valve fixing platform adjustment ring 26 with an inner ring helix and the push rod fixing mechanism adjustment ring 27, respectively. The up and down movement of the valve fixing platform 10 and the push rod fixing mechanism 12 can be controlled by rotating the platform adjustment support rod handle 28 at the top of the platform adjustment support rod 8.

[0037] like Figure 2 As shown, the valve mounting platform 10 consists of a valve mounting plate 29 and a valve mounting body 30, wherein the valve 25, valve seat 31, valve guide rod 32, and spring 33 embedded in the valve mounting body are all fitted according to the actual engine fitting method.

[0038] like Figure 2As shown, the heating device 11 is equipped with an infrared temperature measuring instrument 34 for real-time monitoring of valve temperature.

[0039] like Figure 3 As shown, the push rod fixing mechanism 12 has an adjusting mechanism with a rotatable ring 35 with an inner spiral, used to individually control the position of the push rod fixing mechanism 12. A laser displacement sensor 36 is also mounted on its upper part to measure the valve lift during test bench operation.

[0040] like Figure 3 As shown, the clamping mechanism 13 includes a notched elastic metal ring 37. When the locking screw 38 is tightened, the elastic metal ring clamps the support rod 7. The clamping mechanism 13 on the valve fixing platform 10 and the push rod fixing mechanism 12 has the same features except for the thickness of the ring, and is used to fix the position of the valve fixing platform 10 and the push rod fixing mechanism 12.

[0041] After the entire device is positioned correctly, the heating device 11 is activated. When the valve 25 reaches the preset temperature as measured by the infrared temperature measuring instrument 34, the laser displacement sensor 36 is turned on, zeroed, and set to normal operating condition. Finally, the motor is started to conduct an impact test on the valve. The laser displacement sensor can determine the displacement state of the valve 25 over time by recording the displacement state of the push rod mechanism 9, and thus the velocity and acceleration of the valve 25 can be obtained for subsequent theoretical analysis.

[0042] When the test is completed or when you want to replace the valve with a different material to test its impact performance, you can first remove the valve spring 33, then open the top cover of the heating device 11 to take out the valve 25 and replace it.

[0043] When the cam needs to be replaced, first loosen all clamping mechanisms 13 to ensure that the valve mounting plate 10 and push rod fixing mechanism 12 can move freely up and down via the rotating platform adjusting support rod 8. Then loosen the left shaft locking bolt 23 to allow the left shaft adjusting bolt 17 to rotate freely. Rotate the left shaft adjusting bolt 17 by turning the left shaft adjusting bolt rotating handle 21 to retract the left shaft sliding rod 15, thereby removing the cam 6. After replacing the cam 6, rotate the left shaft rotating handle 20 to align the key of the right shaft 3 with the keyhole of the left shaft sliding rod 15. Then turn the left shaft adjusting bolt rotating handle 21 back to extend the left shaft sliding rod 15 and press the cam 6. Afterward, rotate the platform adjusting support rod 8 to make the roller 24 contact the cam 6. Then, use the rotatable ring 35 to adjust the position of the push rod fixing mechanism 12 separately so that the top of the push rod mechanism 9 is about 20mm away from the push rod fixing mechanism 12, which facilitates the measurement by the laser displacement sensor 36 and prevents the push rod fixing mechanism 12 from interfering with the vertical freedom of the push rod mechanism 9. Finally, tighten all clamping mechanisms 13 to secure them, and the next round of testing can begin.

[0044] In addition to the above-described embodiments, the present invention may have other implementations. All technical solutions employing equivalent substitutions or transformations fall within the scope of protection claimed by the present invention.

Claims

1. A valve impact wear test bench with adjustable impact mode, characterized in that: Includes the test bench body and the test apparatus mounted on the test bench body; The frame body includes a fixed support plate (2) at the bottom and a frame support rod (7) and a frame adjustment support rod (8) vertically installed above one side of the fixed support plate. A valve fixing platform (10) is installed above the frame support rod and the frame adjustment support rod. The test device includes an electric motor (1) installed on the other side of the fixed support plate. The output end of the electric motor is connected to a shaft system set below the valve fixing platform and parallel to the fixed support plate. The shaft system is driven to rotate by the electric motor. The shaft system is connected to a push rod mechanism set vertically above it by a cam block (6). The top of the push rod mechanism is in contact with the valve (25) installed in the valve fixing platform. A push rod fixing mechanism (12) is also provided between the push rod mechanism and the valve. The left and right ends of the push rod fixing mechanism are respectively fitted onto the platform support rod and the platform adjustment support rod. The position of the push rod fixing mechanism and the valve fixing platform is adjusted by the platform adjustment support rod. The test device is also equipped with four clamping mechanisms (13), three of which are symmetrically installed in the same position on the valve fixing platform (10), and one is installed on the push rod fixing mechanism (12). The clamping mechanisms fix the installation positions of the valve fixing platform (10) and the push rod fixing mechanism (12). A heating device is installed on the top of the valve mounting platform; The shaft system includes a keyed right shaft (3) and a left shaft (4), the ends of which are fixed by shaft support seats (5) symmetrically arranged on a fixed support plate; The right shaft is a hollow stepped shaft with a key. One end is connected to the left shaft (4) after a cam block (6) is installed, and the other end is connected to the output end of the motor. The cam block (6) is fitted on the right shaft, connected between the left shaft and the right shaft, and pressed by the two. The profile surface of the cam block (6) is always in contact with the push rod mechanism. The rotation of the cam drives the push rod mechanism to move up and down. The left shaft (4) includes a left shaft sleeve (14), a left shaft sliding rod (15), a left shaft locking sleeve (16), a left shaft adjusting bolt (17), a left shaft fixing flange (18), a left shaft rotating flange (19), a left shaft rotating handle (20), and a left shaft adjusting bolt rotating handle (21). The left shaft sleeve (14) is the main body of the left shaft and is used to fix the various components of the left shaft; the left shaft rotating flange (19) is set at the left end of the left shaft and is bolted to the left shaft sleeve to restrict the movement of the left shaft adjusting bolt (17) along the axial direction; The outer ring of the left shaft adjusting bolt engages with the inner ring of the left shaft sliding rod (15). Guided by the left shaft sleeve, the left shaft adjusting bolt is rotated by the left shaft adjusting bolt rotating handle (21) installed on the outside of the left shaft rotating flange (19), causing the left shaft sliding rod to move back and forth. The top of the left shaft adjusting bolt rotating handle is also equipped with a left shaft fixing cover (22) for fixing its position. The left shaft rotating handle (20) is fixed on the left shaft rotating flange (19). The right end of the left shaft sleeve is fixedly mounted with a left shaft fixing flange (18) by bolts to limit the movement range of the left shaft sliding rod (15); the left shaft locking sleeve (16) is located outside the left shaft adjusting bolt, and the position of the left shaft locking sleeve and the left shaft adjusting bolt is adjusted by the left shaft locking bolt (23) outside it, thereby limiting the left shaft sliding rod.

2. The valve impact wear test bench with adjustable impact mode according to claim 1, characterized in that: The push rod mechanism (9) consists of a rod body and a roller (24) mounted on the top of the rod body. The bottom end face of the roller (24) is in contact with the cam block (6). The mating surface between the rod body and the push rod fixing mechanism (12) is elliptical.

3. The valve impact wear test bench with adjustable impact mode according to claim 1, characterized in that: The push rod fixing mechanism (12) includes a fixing rod body with annular connectors at both ends. The center of the fixing rod body has an elliptical mounting hole for the push rod to pass through. The left end of the push rod fixing mechanism (12) is provided with a rotatable ring (35) with an inner spiral. The rotatable ring (35) is threadedly engaged with the platform adjustment support rod (8). The position of the push rod fixing mechanism (12) can be controlled by rotating the rotatable ring alone. The right end of the push rod fixing mechanism (12) is a clamping mechanism (13), which is used to fix the position of the push rod fixing mechanism (12) after the position is adjusted. A laser displacement sensor (36) for measuring valve lift during bench operation is installed on the fixed rod body at a distance of 10cm from the axis.

4. The valve impact wear test bench with adjustable impact mode according to claim 1, characterized in that: The four clamping mechanisms (13) have the same structure. They are equipped with an elastic metal ring (37) with a notch inside. The notch is perpendicular to the screw-in and screw-out direction of the fastening bolt (38), so that the elastic metal ring (37) can easily deform under the squeezing action of the fastening bolt (38) to achieve the fixation of the clamping mechanism.

5. The valve impact wear test bench with adjustable impact mode according to claim 1, characterized in that: The valve mounting platform (10) consists of a valve mounting plate (29) and a valve mounting body (30) connected by bolts. The valve mounting plate has four holes symmetrically opened in the circumferential direction for mounting the mounting bracket adjustment support rod and the mounting bracket support rod. After the mounting bracket adjustment support rod and the mounting bracket support rod pass through the corresponding holes, their positions are adjusted by the valve mounting platform adjustment ring (26) and fixed by the clamping mechanism (13). The valve mounting body has a fixing position for embedding valve components at its center.

6. The valve impact wear test bench with adjustable impact mode according to claim 1, characterized in that: The heating device is equipped with an infrared temperature measuring instrument (34) for real-time monitoring of valve temperature.

7. The valve impact wear test bench with adjustable impact mode according to claim 1, characterized in that: The frame adjustment support rod (8) includes a threaded rod body. The bottom of the rod body is mounted on a fixed support plate via a mounting seat, and the top is provided with a frame adjustment support rod handle (28) for adjusting the position of the valve fixing platform and the push rod fixing mechanism. The rod body is connected to the valve mounting plate and the push rod fixing mechanism by means of a threaded connection through the valve mounting plate adjusting ring (26) with an inner ring helix and the push rod fixing mechanism adjusting ring (27); The support rods (7) of the platform are three in number and are symmetrically installed on the fixed support plate through the mounting base at the bottom.

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