A piston oscillation cooling shooting test device

Abstract

The application provides a piston oscillation cooling shooting test device, and relates to the technical field of internal combustion engines. A piston clamp is used for clamping and fixing a piston. The piston can be fixed at different angles. A sliding table drives the piston clamp to move along the axis direction of the piston, so as to simulate the working state of the piston in different types of internal combustion engines. In the process of moving the piston, the oil pump of a circulating oil supply mechanism provides power to the oil, so that the nozzle sprays oil to the piston. The thermostat keeps the oil at a certain temperature. Part of the oil enters the oil inlet of the piston, and the other part of the oil is collected by the oil collecting disc for reuse. The device can realize different piston fixation, so that the piston simulates the motion state in different internal combustion engines, and the universality of the shooting rate test is improved. The test result of the shooting rate can effectively evaluate the structure design of the oil cavity in the piston.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of internal combustion engines, and further relates to a piston oscillation cooling shooting test device. BACKGROUND

[0002] In recent years, diesel engines have been widely used in the field of vehicle power due to their high thermal efficiency, large output power, low operating cost, and high fuel safety, etc., which has led to the continuous increase of the power of diesel engines. Fundamentally, it is the result of the joint promotion of the demand of the application field and the development of diesel engine technology. As a power system, energy saving, environmental protection and providing greater output power are the goals of the continuous development of diesel engines. With the improvement of material performance and processing technology, the application of supercharging intercooling technology, high-pressure fuel supply and electronic control injection technology and a series of technical measures, the continuous increase of the power of diesel engines is realized.

[0003] In the development practice of new engine products, people realize that when developing a diesel engine with advanced technical and economic indicators, after a certain adjustment test, the performance indicators are generally easier to meet the design requirements, but the service life and working reliability are not easy to achieve the expected goal, and often it takes a long time to solve the problem. Among them, the thermal load failure is one of the real "roadblocks". Especially today, diesel engines are increasingly strengthened, and the solution of the thermal load problem of diesel engines has become an urgent task for the discipline of internal combustion engines. And because the thermal load problem involves multiple disciplines, it has become one of the important scientific frontiers in the fields of internal combustion engines and heat transfer.

[0004] The piston is one of the most important key components in the diesel engine, and also one of the most severely heat-loaded parts in the diesel engine. The substantial strengthening of the diesel engine leads to a rapid increase in the thermal load of the piston directly contacted with the gas, which causes the mechanical properties of the piston material to decrease significantly, and the piston may fail in different forms. With the improvement of diesel engine emissions, the degree of strengthening, the continuous increase of explosion pressure and power, the mechanical load and thermal load borne by the piston are also increasing, so how to effectively reduce the thermal load is a key problem faced by technicians in the design of the piston. Through comparison of several cooling methods of the current vehicle engine piston, it is found that the internal cooling oil cavity arranged in the piston head is the most effective way to reduce the thermal load of the diesel engine piston and improve the power density.

[0005] Internal combustion engines have different piston sizes and piston arrangement methods (in-line, V-type, etc.). The current shooting rate test device is not very versatile for test pistons of different cylinder diameters and different cylinder arrangement methods, and cannot be used for different piston detection.

[0006] For those skilled in the art, how to improve the versatility of the shooting rate test is a technical problem to be solved at present. SUMMARY

[0007] The application provides a piston oscillation cooling shooting test device, which can simulate different piston movement states and has universality, and the specific scheme is as follows.

[0008] A piston oscillation cooling shooting test device, comprising:

[0009] A driving mechanism, comprising a sliding table and a piston clamping piece, the piston clamping piece is used for clamping and fixing a piston, the piston can be fixed at different angles; the piston clamping piece is installed on the sliding table, and the sliding table is used for driving the piston clamping piece to move along the axial direction of the piston;

[0010] A circulating oil supply mechanism, comprising a thermostat, a nozzle, an oil collecting disc, a nozzle clamping piece, and an oil pump, the nozzle clamping piece is used for clamping the nozzle and can adjust the angle of the nozzle so that the nozzle sprays towards the oil inlet of the piston; the oil pump provides power for the oil to be supplied to the nozzle, and the oil collecting disc collects the falling oil for reuse.

[0011] Optionally, the circulating oil supply mechanism comprises a flow meter for detecting the total oil amount, the oil pump is a flow pump, and the circulating oil supply mechanism further comprises an oil return pipeline connected to the oil outlet of the piston, the oil return pipeline delivers the oil discharged from the piston to a measuring cylinder.

[0012] The shooting rate is obtained according to the ratio of the oil amount collected by the measuring cylinder to the total oil amount of the oil pump.

[0013] Optionally, a temperature sensor is arranged on the upper surface of the piston made of metal, the circulating oil supply mechanism sprays constant-temperature oil to the oil inlet of the piston, and the shooting rate is reflected according to the ratio of the detection temperature of the temperature sensor to the oil temperature.

[0014] Optionally, the sliding table comprises a horizontal sliding table capable of realizing horizontal driving and a vertical sliding table capable of realizing vertical driving; the horizontal sliding table and the vertical sliding table cooperate with each other to move the piston along the axial direction.

[0015] Optionally, the vertical sliding table is installed on the output end of the horizontal sliding table, and the two ends of the horizontal sliding table are respectively installed on the output ends of linear guides, and the output driving directions of the linear guides and the horizontal sliding table are perpendicular.

[0016] Optionally, the piston clamping piece comprises a support plate, a rotating adjusting plate, a pressing plate, and a fixing screw rod, and the support plate is fixed on the output end of the horizontal sliding table or the output end of the vertical sliding table.

[0017] An arc-shaped sliding rail is arranged on the support plate, at least three positioning pegs are arranged on the rotating adjusting plate, the positioning pegs are inserted into the arc-shaped sliding rail, and the rotating adjusting plate is used for adjusting and positioning.

[0018] The pressing plate fixes the piston to the rotating adjusting plate by two fixing screws.

[0019] Optionally, the piston holder further comprises adjusting blocks, and a width adjusting rail is arranged on the rotating adjusting plate, and the two adjusting blocks are respectively adjusted in position relative to the rotating adjusting plate by adjusting bolts.

[0020] Optionally, a plurality of positioning holes are arranged on the adjusting blocks, and the positioning holes are used to adjust the fixing positions of the fixing screws.

[0021] Optionally, the horizontal sliding table and the vertical sliding table are respectively driven by a lead screw.

[0022] Optionally, the sliding table comprises a vertical sliding table, and the bottom of the vertical sliding table is hingedly arranged on a support frame, so that the vertical sliding table can be directed towards different directions.

[0023] The piston can be clamped to the output end of the vertical sliding table.

[0024] The present application provides a piston oscillation cooling shooting test device, a piston holder is used to clamp and fix a piston, the piston can be fixed at different angles, a sliding table drives the piston holder to move along the axis direction of the piston, so as to simulate the working state of the piston in different types of internal combustion engines; in the process of moving the piston, the oil pump of a circulating oil supply mechanism provides power to the oil, so that the nozzle sprays oil to the piston, the thermostat keeps the oil at a certain temperature, part of the oil enters the oil inlet of the piston, and the other part of the oil is collected by the oil collecting disc for reuse. The device can realize different piston fixation, simulate the motion state of the piston in different internal combustion engines, improve the universality of the shooting rate test, and effectively evaluate the design of the piston internal cooling oil cavity structure through the test results of the shooting rate. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The axial view of the piston oscillation cooling shooting test device provided by the present application is shown in the figure;

[0027] Figure 2 The front view of the piston oscillation cooling shooting test device provided by the present application is shown in the figure;

[0028] Figure 3 The axial view of the piston holder is shown in the figure;

[0029] Figure 4 This is a schematic diagram of the circulating oil supply mechanism.

[0030] The image includes:

[0031] Drive mechanism 1, slide table 11, transverse slide table 111, vertical slide table 112, linear guide rail 113, piston clamp 12, support plate 121, arc slide rail 1211, rotation adjustment plate 122, positioning bolt 1221, width adjustment rail 1222, positioning platform 1223, pressure plate 123, fixing screw 124, adjusting block 125, positioning hole 1251, circulating oil supply mechanism 2, thermostat 21, nozzle 22, oil collection tray 23, nozzle clamp 24, oil pump 25, return oil pipe 26, measuring cylinder 27, flow meter 28, upstream pressure gauge 29, downstream pressure gauge 210, safety valve 211. Detailed Implementation

[0032] The core of this invention lies in providing a piston oscillation cooling target test device that can simulate different piston motion states and achieve versatility.

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the piston oscillation cooling target test device of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Combination Figure 1 , Figure 2 This invention provides a piston oscillation cooling target test device, including a drive mechanism 1 and a circulating oil supply mechanism 2, etc. The drive mechanism 1 includes a slide table 11 and a piston clamp 12, etc. The piston clamp 12 is used to clamp and fix the piston, and the piston clamp 12 holds the piston 12 at a specific angle. The piston can be fixed at different angles, so that the angle of the piston is consistent with its actual working state; for example, the piston in a straight cylinder moves vertically up and down, and the axis of the cylinder is vertical; the piston in a V-type cylinder moves obliquely, and the axis of the cylinder is oblique.

[0035] The piston clamp 12 is mounted on the slide table 11, which drives the piston clamp 12 to move along the piston's axial direction. During the test, the piston clamp 12 and the piston it fixes move synchronously. Driven by the slide table 11, the piston moves along its own axial direction, which is consistent with the piston's movement direction in the internal combustion engine.

[0036] The circulating oil supply mechanism 2 includes a thermostat 21, a nozzle 22, an oil collection tray 23, a nozzle clamp 24, an oil pump 25, and other structures. It should be noted that... Figure 1 Figure 2 The actual oil pipelines are not shown; they are only used as illustrations for ease of understanding.Figure 4 The thermostat 21, the nozzle 22 and the oil pump 25 are located on the same oil path, the oil pump 25 is used for pumping the oil to move along the oil path, and the thermostat 21 is used for keeping the oil in the oil path at a certain temperature, and the oil at the certain temperature is used for the test. When the oil pump 25 pumps the oil to the nozzle 22, the oil is sprayed from the nozzle, and the oil can be sprayed to the piston.

[0037] The oil pump 25 provides power to the nozzle 22 to spray the oil, the nozzle clamp 24 is used for clamping the nozzle 22 and can adjust the angle of the nozzle 22, and the angle of the nozzle 22 is kept unchanged during the test, and different setting angles of the nozzle 22 can be matched according to different piston tests. When the test is performed, the spraying direction of the nozzle 22 is towards the oil inlet of the piston, so that the nozzle 22 sprays the oil towards the oil inlet of the piston, part of the oil enters the oil inlet of the piston, and the other part of the oil falls into the oil collecting disc 23, the oil collecting disc 23 collects the falling oil for reuse, and the oil collecting disc 23 is located below the piston, and when the test is performed, the nozzle 22 sprays the oil, and the oil can fall into the oil collecting disc 23. The oil collecting disc 23 adopts a horn structure with large upper part and small lower part, and can converge the oil. Figure 4

[0038] The piston oscillation cooling target test device provided by the application only tests the piston, does not need to set a complex cylinder body, and is simple in structure. When the test is performed, the piston can be adjusted to different angles, and the piston moves along the axis direction of the piston, the working conditions of the piston in different internal combustion engines can be simulated, the angles of the piston in different internal combustion engines are different, and the movement states are also different, so that the simulation of multiple states is realized, the target test of the piston when spraying the oil under different working conditions is simulated, and the target rate of the piston can be obtained. Through the test result of the target rate, the piston inner cooling oil cavity structure design can be effectively evaluated.

[0039] On the basis of the above scheme, the application provides two specific ways of measuring the target rate, the first way, the circulating oil supply mechanism 2 includes a flow meter 28 for detecting the total oil amount, the flow meter 28 is used for measuring the total flow, that is, the total oil amount sprayed from the nozzle 22. The oil pump 25 is a flow pump, and the flow is accurately controlled through PID, and the oil pump 25 is combined with the thermostat 21 to keep the oil at a certain temperature. Figure 4 ​Wherein A represents a piston, the circulating oil supply mechanism 2 further comprises an oil return pipeline 26 connected to the oil outlet of the piston, the oil return pipeline 26 delivers the oil discharged by the piston to a measuring cylinder 27, the oil received by the measuring cylinder 27 is the amount of oil injected into the piston; the hit rate is obtained according to the ratio of the amount of oil collected by the measuring cylinder 27 to the total amount of oil of the oil pump 25. This way, the hit rate is tested according to the definition of the hit rate, that is, hit rate = collected oil amount / total injected oil amount, the ratio obtained is the hit rate, the larger the value is, the higher the hit rate is. In addition, an upstream pressure gauge 29 and a downstream pressure gauge 210 can also be arranged on the oil circuit of the circulating oil supply mechanism 2, and a safety valve 211 is arranged to avoid excessive pump oil pressure. In this case, a transparent piston model can be used for testing to facilitate observation of the oil inside the piston.

[0040] The second way is to arrange a temperature sensor on the upper surface of the metal piston, the circulating oil supply mechanism 2 injects constant-temperature oil into the oil inlet of the piston, and the hit rate is reflected according to the ratio of the temperature detected by the temperature sensor to the temperature of the oil. The ultimate purpose of injecting oil into the piston is to cool the piston, and the hit rate is ultimately used to evaluate the cooling effect of the piston, so the present application directly detects the temperature change of the upper surface of the piston during testing. The nozzle 22 injects constant-temperature oil into the oil inlet of the piston, the high-temperature oil transfers heat from the bottom to the top of the piston, and the temperature sensor on the top surface detects the temperature of the top of the piston, that is, the hit rate is reflected by the rate of temperature transfer. The closer the temperature value of the temperature sensor is to the temperature value of the oil, the faster the temperature transfer is, and the better the cooling effect of the oil on the piston when the piston is working in the internal combustion engine.

[0041] On the basis of any of the technical solutions above and combinations thereof, Figure 1 The sliding table 11 of the present application comprises a horizontal sliding table 111 capable of realizing horizontal driving and a vertical sliding table 112 capable of realizing vertical driving; the horizontal sliding table 111 and the vertical sliding table 112 cooperate with each other to move the piston along the axial direction.

[0042] In combination with Figure 1 As shown in the figure, the horizontal sliding table 111 drives along the X-axis direction, and the vertical sliding table 112 drives along the Z-axis direction, the driving directions of the horizontal sliding table 111 and the vertical sliding table 112 remain fixed, and different directions are realized by the cooperation of the horizontal sliding table 111 and the vertical sliding table 112. Figure 1 For in-line cylinders, the piston only needs to move vertically up and down, and only the vertical sliding table 112 can drive the piston to move; for V-type cylinders, the horizontal sliding table 111 and the vertical sliding table 112 drive at the same time to simulate oblique motion, specifically, the output end of the horizontal sliding table 111 drives the vertical sliding table 112 as a whole to move along the X-axis, and the output end of the vertical sliding table 112 drives the piston to move along the Z-axis, the two motions are superimposed to form spatial oblique motion.

[0043] The vertical slide 112 is mounted on the output end of the horizontal slide 111, and the two ends of the horizontal slide 111 are respectively mounted on the output ends of the linear guide rails 113, which are perpendicular to the output driving direction of the horizontal slide 111. The linear guide rails 113 can adjust the Y-axis direction position of the horizontal slide 111 to ensure that the piston is located near the center of the oil pan 23 during the test. It should be noted that the linear guide rails 113 can remain stationary during the test, but if necessary, the piston can also be driven to move through the cooperation of the linear guide rails 113, the horizontal slide 111, and the vertical slide 112.

[0044] In combination Figure 3 The piston clamping device 12 of the present application includes a support plate 121, a rotating adjustment plate 122, a pressing plate 123, and a fixed screw 124, etc. The support plate 121 is fixed on the output end of the horizontal slide 111 or the output end of the vertical slide 112, and plays a supporting role.

[0045] The rotating adjustment plate 122 contacts the support plate 121, and the support plate 121 is provided with an arc-shaped slide rail 1211. The rotating adjustment plate 122 is provided with at least three positioning pins 1221, which are located on the same arc line and are inserted into the arc-shaped slide rail 1211 for adjustment and positioning. When the position of the rotating adjustment plate 122 is adjusted in place, the three positioning pins 1221 are tightened, and the rotating adjustment plate 122 and the support plate 121 are relatively fixed. When the angle needs to be adjusted, the three positioning pins 1221 are loosened, and the adjustment is realized through the cooperation of the three positioning pins 1221 and the arc-shaped slide rail 1211. The arc-shaped slide rail 1211 can generally provide an adjustment angle range of 120 degrees. The lower part of the rotating adjustment plate 122 is provided with a positioning table 1223, which contacts the skirt of the piston to realize positioning when clamping the piston.

[0046] The pressing plate 123 fixes the piston to the rotating adjustment plate 122 through two fixed screws 124. The pressing plate 123 is substantially parallel to the rotating adjustment plate 122, and the pressing plate 123, the rotating adjustment plate 122, and the two fixed screws 124 form a quadrilateral, which can surround the outer periphery of the piston to fix the piston. When the two fixed screws 124 are tightened synchronously, the pressing plate 123 and the rotating adjustment plate 122 press and fix the piston to position and fix the piston.

[0047] Further, the piston clamp 12 of the present application further comprises two adjusting blocks 125, which are installed on the rotating adjusting plate 122; a width adjusting rail 1222 is arranged on the rotating adjusting plate 122, which extends in the X-axis direction, and the two adjusting blocks 125 are respectively adjusted in position relative to the rotating adjusting plate 122 through adjusting bolts, and the interval between the two adjusting blocks 125 is adjusted through the relative displacement of the two adjusting blocks 125, so as to match the pistons of different diameters.

[0048] A plurality of positioning holes 1251 are arranged on the adjusting block 125, which are used for adjusting the fixed position of the fixing screw 124. The plurality of positioning holes 1251 are arranged in the Z-axis direction, and one fixing screw 124 can be installed in each positioning hole 1251, and the fixing screw 124 can be installed in different positioning holes 1251 according to different specifications of the piston.

[0049] Specifically, the transverse slide 111 and the vertical slide 112 of the present application are respectively driven by a lead screw, and other power structures such as an oil cylinder can also be used.

[0050] In addition to the above-mentioned solutions, the angle adjustment of the piston can also be realized in the following manner: the slide 11 comprises a vertical slide 112, the bottom of the vertical slide 112 is hingedly assembled to the support frame, and the angle of the vertical slide 112 itself can be adjusted so that the vertical slide 112 can face different directions; the piston can be clamped to the output end of the vertical slide 112, at this time, only the axis of the piston needs to be arranged in parallel with the driving direction of the vertical slide 112, and the angle adjustment can be realized by adjusting the angle of the vertical slide 112 during the test.

[0051] A specific test process is provided below, and the test purpose is to obtain the piston oscillation cooling hitting rate of a certain large-power single-cylinder engine. The diameter of the transparent test piston is 150 mm, the stroke is 135 mm, the oil injection pressure of the cooling nozzle is 3.2 bar, the flow rate is 1.2 L / min, and the temperature is 90℃. The test time is 90s each time.

[0052] The test steps are as follows:

[0053] Step one: according to the test requirements, the high-speed linear motor is programmed to have the function of driving the test piston with a cylinder diameter of 150 mm to perform a reciprocating piston motion with a stroke of 135 mm. The high-speed linear motor is connected, and preparation is made for the subsequent test.

[0054] Step two: clamp the transparent test piston and the cooling nozzle on the variable-angle nozzle clamp, and adjust the axial position and angle relationship between the piston and the nozzle according to the test requirements.

[0055] Step three: start the PID flow pump, flow meter and other regulating and data acquisition devices in the circulating oil circuit, power on the thermostat and inject the cooling oil, when the oil is heated to 90℃, open the oil pump port of the thermostat and record the test start time, the oil is sprayed out of the nozzle, part of it splashes into the oil collection tray to continue to participate in the circulation, and part of it enters the target piston to participate in the oscillation cooling and flows into the measuring cylinder through the oil pipe. The high-speed camera records the oscillation state of the two-phase flow in the transparent test piston during the test, providing data support for studying the oscillation mechanism of the two-phase flow.

[0056] Step four: when the nozzle sprays oil for 90s, close the oil pump port, weigh the oil in the measuring cylinder and empty the measuring cylinder.

[0057] Step five: calculate the oscillation cooling targeting rate according to the amount of oil sprayed by the nozzle and the amount of oil collected in the measuring cylinder, and analyze and record the data collected by the data acquisition system. Save all experimental data and end the single test.

[0058] Step six: repeat the above steps until the results are stable, and end the experiment.

[0059] The above description of disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston oscillation cooling target testing device, characterized in that, include: The drive mechanism (1) includes a slide (11) and a piston clamp (12). The piston clamp (12) is used to clamp and fix the piston, which can be fixed at different angles. The piston clamp (12) is mounted on the slide (11), and the slide (11) is used to drive the piston clamp (12) to move along the axis of the piston. The circulating oil supply mechanism (2) includes a thermostat (21), a nozzle (22), an oil collection tray (23), a nozzle clamp (24), and an oil pump (25). The nozzle clamp (24) is used to hold the nozzle (22) and can adjust the angle of the nozzle (22) so that the nozzle (22) sprays towards the oil inlet of the piston. The oil pump (25) provides power to the oil to supply oil to the nozzle (22) for spraying. The oil collection tray (23) collects the falling oil for reuse. The slide (11) includes a transverse slide (111) capable of lateral drive and a vertical slide (112) capable of vertical drive; the transverse slide (111) and the vertical slide (112) cooperate with each other; the piston can be adjusted to different angles and the piston can move along the piston axis direction to simulate the working conditions of the piston in different internal combustion engines; the vertical slide (112) is installed at the output end of the transverse slide (111), and the two ends of the transverse slide (111) are respectively installed at the output end of the linear guide (113), and the output drive direction of the linear guide (113) and the transverse slide (111) is perpendicular.

2. The piston oscillation cooling target testing device according to claim 1, characterized in that, The circulating oil supply mechanism (2) includes a flow meter (28) for detecting the total oil volume, the oil pump (25) is a flow pump, and the circulating oil supply mechanism (2) also includes a return oil pipe (26) connected to the piston oil outlet, the return oil pipe (26) transports the oil discharged by the piston to the measuring cylinder (27). The target hit rate is obtained by the ratio of the amount of oil collected by the measuring cylinder (27) to the total amount of oil pumped out by the oil pump (25).

3. The piston oscillation cooling target testing device according to claim 1, characterized in that, A temperature sensor is installed on the upper surface of the metal piston. The circulating oil supply mechanism (2) sprays constant temperature oil into the oil inlet of the piston. The hitting rate is reflected by the ratio of the temperature detected by the temperature sensor to the oil temperature.

4. The piston oscillation cooling target testing device according to claim 1, characterized in that, The piston clamp (12) includes a support plate (121), a rotation adjustment plate (122), a pressure plate (123), and a fixing screw (124). The support plate (121) is fixed to the output end of the horizontal slide (111) or the output end of the vertical slide (112). The support plate (121) is provided with an arc-shaped slide rail (1211), and the rotating adjustment plate (122) is provided with at least three positioning bolts (1221). The positioning bolts (1221) are inserted into the arc-shaped slide rail (1211) for adjustment and positioning. The pressure plate (123) presses and fixes the piston to the rotating adjustment plate (122) by two fixing screws (124).

5. The piston oscillation cooling target testing device according to claim 4, characterized in that, The piston clamp (12) also includes an adjusting block (125), and a width adjusting rail (1222) is provided on the rotating adjusting plate (122). The two adjusting blocks (125) are respectively adjusted relative to the rotating adjusting plate (122) by adjusting bolts.

6. The piston oscillation cooling target testing device according to claim 5, characterized in that, The adjusting block (125) is provided with a plurality of positioning holes (1251), which are used to adjust the fixed position of the fixing screw (124).

7. The piston oscillation cooling target testing device according to claim 1, characterized in that, The horizontal slide (111) and the vertical slide (112) are driven by lead screws respectively.

8. The piston oscillation cooling target test apparatus according to any one of claims 1 to 3, characterized in that, The slide (11) includes a vertical slide (112), the bottom of which is hinged to the support frame so that the vertical slide (112) can face different directions; The piston can be engaged at the output end of the vertical slide (112).

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