JPH0453561Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology belongs to the technical field of device structure for testing the durability over time of a turbocharger attached to an automobile engine to obtain high horsepower during acceleration. .

Therefore, this invention was developed to provide a burner that supplies combustion gas through a combustion gas passage to a test turbine wheel of a turbocharger attached to an engine mounted on an actual vehicle in order to conduct a long-term durability test during high-speed rotation of the test turbine wheel. It is a turbocharger durability test equipment equipped with a test turbine wheel similar to the actual machine, and also measures fine particles such as metal particles in the combustion gas passage facing from the burner to the turbine wheel. Concerning a turbocharger durability test device that faces a particle supply passage from a device that supplies non-quantitatively and continuously or discontinuously, and is connected to an air supply passage in a factory via a flow rate adjustment device, etc. In particular, an individual feeder for the supplied particles is placed inside the closed container connected to the hopper so that the particles can be individually supplied one by one from the closed container to the particle supply passage. Further, a particle gas transport passage is interposed in an ejector connected between the closed container and the particle supply passage, and the internal pressure of the closed container is made higher than that of the ejector by a pressure booster, and the internal pressure of the closed container is made higher than the ejector. This invention relates to a connected turbocharger durability test device.

<Prior art> As is well known, turbochargers have recently become widely installed in automobile engines in order to increase the horsepower when driving at high speeds, and to improve the so-called acceleration time lag phenomenon and reduce the intercept rotation speed. Research has become more and more intensive, and not only theoretical analyzes but also various tests are being conducted.

Therefore, among various tests on turbochargers, torsional torque,
Various durability tests were conducted to evaluate mechanical properties such as bending and tension, as well as reliability, and low-speed and high-speed tests were repeatedly conducted at room temperature and high temperature on test turbochargers similar to those used on actual vehicles. For example, a turbocharger durability test device as shown in Figure 5 was developed on pages 79 to 83 of "Automobile Research Vol. 8, No. 3" published by Nissan Motor Co., Ltd. in March 1986. It has been put into practical use.

That is, for the test turbine wheel 2 of the actual model turbocharger 1 shown in FIG. The combustion gas is supplied to the test turbine wheel 2 through the combustion gas passageway 2, and the combustion gas is discharged. At this time, another flow rate regulating valve 7 is interposed in the bypass combustion gas passage 8 to conduct a durability test.

In addition, the embodiment shown in Fig. 6 (the same reference numerals are attached to the same mechanical parts as in Fig. 5) and the turbocharger durability test device of Utility Application No. 125449/1983, which was invented by the applicant in the earlier application, are basically the same. A model with similar functionality has been developed and put into practical use.

Since the turbocharger durability test equipment is a type of test equipment for actual machine models, in the test environment, it is difficult to detect any particles that have been peeled off from the exhaust system actually installed in the automobile, such as from the exhaust manifold. There is almost no possibility of troubles such as foreign metal particles such as metal powder or metal oxides being mixed in, and long-term durability tests are being conducted from the structural and mechanical aspects of basic turbochargers.

Of course, as mentioned above for the turbine wheel,
Mechanical erosion caused by the impact of sand, fine metal particles, flaky metal oxides, etc. during casting that have peeled off from the exhaust manifold and are carried by high-speed combustion gas is also an extremely important test theme, and we will therefore take measures to address this issue. Preferably, as shown in FIG. 7, the raw material chip 9 of the turbine wheel is set in the holder 11 of the device housing 10, and compressed air 13 and combustible gas 14 from the turbo blower 12 are supplied to the burner 3 to blow the combustion chamber 15. A combustion gas is formed in the combustion gas passage, and is radiated from the nozzle 16 to the material chip 9 through the combustion gas passage, and the physicochemical properties of the metal particles from the actual machine are as much as possible from the particle supply passage 17 facing the part immediately before the nozzle 16. Mix and supply particles close to
The material chip 9 is collided with the material chip 9 at high speed, and the exhaust gas passage 18 is
It is made to be discharged from

However, these turbocharger durability test devices and erosion test devices are both designed to perform basic durability tests, and are not intended to be used to test the durability of a turbocharger installed in an actual vehicle under various harsh synergistic conditions. However, even when durability tests are carried out on mechanical parts and materials in turbocharger durability tests, an environment where erosion due to peeling and fine metal particles occurs is not provided. Because it is fixed to the holder 11 in the housing 10, the velocity of the combustion gas (maximum 100 to 200 m/min) related to the impact load of the colliding fine metal particles
sec) is much smaller than the rotational speed of an actual turbine wheel (circumferential speed of 400 to 500 m/sec), and theoretically, the sound speed is at most 350 m/sec, which is the limit speed, making it difficult to reproduce difficult conditions. The drawback was that the test could not guarantee the accuracy of the test.

Therefore, in criticality tests where there is a risk that metal particles may be discharged from the exhaust system of an actual vehicle and accidentally mixed into the combustion gas, combustion gas containing metal particles collides with a test turbine wheel of a turbocharger similar to that of an actual vehicle. It has become desirable to be able to reproduce this under various conditions.

In particular, durability is required under special extreme conditions, such as when small amounts of particles are continuously mixed into the combustion gas over time, or when large amounts of particles are explosively mixed into the combustion gas due to impactful exfoliation. Although testing has been desired, no durability test equipment has been developed that can handle these variously changing particle contamination conditions, resulting in the inability to obtain reliable evaluations over a long period of time. It was hot.

In order to deal with this, the applicant's earlier invention, Utility Application No. 1982-192410, as shown in FIG. A durability testing device 18 for an erosion test for a test turbine wheel 2 was developed, in which the compressed air and combustible gas from the compressed air passage 13 and the combustion gas supply passage 14 are combusted by the burner 3, and the combustion is carried out from the combustion gas passage 4. Gas is supplied from the mixing section 19 to the test turbine wheel 2, and particles 32 are pushed from the hopper 20' of the particle supply device 20 to the mixing section 19 from the screw feeder 21 rotated by the motor 22, The compressed air supplied from the compressed air source 25 through the air supply passage 24 passes through the electromagnetic valve 27 , the purge meter 28 , and the flow rate adjustment valve 29 , and the ejector 23 transports the compressed air to the particles 32 from the particle supply passage 17 to the mixing section. Particle 32 on 19
The control device controls the supply of particles 32 in large quantities from the hopper 30' of the one-shot injection device 30 of the explosive particles 32 to emit continuous particles 32 to the test turbine wheel 2. a solenoid valve 27 controlled by 26 via lead wire 35;
A damage test due to erosion of the turbine wheel 2 was carried out by selectively supplying it using a purge meter 28 and a flow rate adjustment valve 29.

A pressure equalizing pipe 31 is connected externally between the ejector 23 and the hopper 20' to basically prevent the particles 32 from being supplied from the screw feeder 21 due to the pressure difference between the two. There is.

<Problems to be solved by the invention> However, in the above-mentioned prior art, the supply of air for transportation was cut off by opening and closing the electromagnetic valve 27, and the group of particles 32 from the screw feeder 21 was cut off. Due to the extrusion, the quantitative supply of particles 32 per unit time became unstable, and there was a drawback that precise testing was not possible.

That is, one reason is that when the electromagnetic valve 27 is open, the pressure inside the hopper 20' is low compared to the rapid pressure rise, and therefore, air backflows from the ejector 23 to the hopper 20'. The particles 32 remaining in the screw feeder 21 are removed from the hopper 2.
Furthermore, when the electromagnetic valve 27 is shut off, the opposite phenomenon to that described above occurs, and a small amount of particles 32 in the screw feeder 21 remain in the ejector 23, even though the test has ended. First, since the particles 32 are emitted while the test turbine wheel 2 continues to rotate, there was a problem in that this situation could lead to the test turbine wheel 2 being destroyed.

Also, as mentioned above, the ejector 23
The particles 32 remain in the particle supply passage 17 and the ejector 23 and the particle supply passage 1 are removed at the start of the next test.
Since it is undesirable for the particles 32 to remain in the particles 7, it is necessary to discharge them using compressed air, resulting in a problem that the work and management become complicated.

Furthermore, secondly, since the screw feeder 21 is mechanically rotated at a constant speed by the motor 22, the particles 32 may become larger or smaller than the set weight due to the impact when the screw feeder 21 starts up or stops. However, because the particles are discharged in clusters, the amount of particles per unit time becomes unstable over time, resulting in unstable data.

This is despite the fact that the particles emitted from the exhaust system of actual vehicles are relatively large particles of about 0.1 to 2 mm, so in extreme conditions it is desirable to supply one to several particles per unit time. , I started getting negative points about not being able to do this.

As mentioned above, it is necessary to constantly supply irregularly shaped granular substances or thin film-like particles of about 0.1 to 2 mm to the turbine wheel of the turbocharger per hour. When using a particle supply device with a constant supply amount per hour over time instead of a feeder, if a commercially available feeder is installed, parts feeders, micro feeders, particle generators, etc. may be used instead. do.

However, in this kind of commercially available particle feeding device, first of all, the conventional type of supplies that are fixed as parts feeders are rather block-shaped items such as bolts and nuts with a size of several mm to several tens of mm. It is inconvenient that it cannot be used as a feeder for turbocharger durability tests to supply particles of about 0.1 to 2 mm, and it is also difficult to adjust the supply amount over time considering the condition of the material to be fed. There is.

In addition, the feed target of micro feeders is generally powder, and the powder and granules may be crushed by rollers, and micro-sized powder may also be mixed in, so they are not applicable. There is.

In addition, the particle generator targets particles of 0.2 to 50 μm.
These particles are limited to ultrafine particles such as 0.1 to 2 mm, and are therefore ineligible to be used as test particles for turbocharger turbine wheels.Therefore, these commercially available particle supply devices cannot be used. There was a problem.

The purpose of this invention was to solve the problems of the durability test for turbocharger turbine wheels based on the above-mentioned conventional technology as a technical problem to be solved. Use of engine technology in the automotive industry by ensuring that the general situation is sufficient to ensure the desired data reliability so that actual useful data can be obtained and a stable evaluation of the mechanical erosion of turbochargers can be obtained. The purpose of this invention is to provide an excellent turbocharger durability test device that will benefit the field.

<Means/effects for solving the problems> In line with the above-mentioned purpose, the structure of this invention, which is summarized in the scope of the above-mentioned utility model registration claims, is to solve the above-mentioned problems by using a test turbocharger similar to the turbocharger equipped in an actual vehicle. A turbine wheel is equipped in a durability test equipment, and compressed air and flammable gas are combusted by a burner that does not contain metal particles, generating combustion gas, which is then passed through a combustion gas passage to the test turbine wheel. in the part of the combustion gas passage directed toward the turbine wheel,
The particle supply passages are closed and the carrier gas is supplied via air from a compressed air source within the factory, in which case the flow rate of particles over time can be quantitative, non-quantitative, continuous, or discontinuous, similar to actual conditions. Furthermore, in addition to continuous feeding, it is also possible to perform even an impactful one-shot feeding, so that the speed of the particles riding on the combustion gas and the actual operating speed of the test turbine wheel are high. The relative collision speed of the turbine wheel is reproduced, and the amount of damage to the turbine wheel is quantitatively obtained as data. At this time, particles are charged from the hopper into an airtight container installed in the particle supply device in an estimated state, and then Then, the individual feeders provided in the sealed container operate to transport the particles upward one by one, and the particle gas transport passage facing the raised position of the individual feeder is connected to the ejector and the sealed container inside the ejector. The internal pressure of the closed container is made higher than the internal pressure of the ejector by a pressure booster installed in the passageway through which the internal pressure of the ejector is communicated with the air supply from the compressed air source of the ejector. Particles are fed one by one through the particle gas transport passage by the ejector action from the passage, and particles can be supplied to the particle supply passage one by one by increasing or decreasing the continuous supply amount per hour depending on the operating speed of the individual feeder. It is possible to elastically and selectively supply particles in a range of set particle diameters and sizes from one or two units to a crowd, and even an explosive large amount of particles to the test turbine wheel. We have taken technical measures to ensure that stable evaluations can be obtained through reliable long-term durability tests.

<Example> Next, an example of this invention will be described below based on FIGS. 1 to 4. Incidentally, parts that are the same as those in the drawings from FIG. 5 onwards will be described using the same reference numerals.

18'' is a turbocharger durability test device that forms the gist of this invention, and is connected to a compressed air passage 13 and a flammable gas (light oil) supply passage 14, facing the test turbine wheel 2 of the turbocharger 1 similar to the equipment on an actual vehicle. A burner 3 facing the combustion chamber 3 is arranged to blow its combustion gas to the test turbine wheel 2 through a combustion gas passage 4 from a mixing section 19 formed at its tip.

20'' is a particle supply device, and its hopper 20 is kept in a secret state by a shutter or the like as appropriate, so that its internal pressure is always maintained at a predetermined level, and the particles 32 can be replenished by opening and closing the shutter or the like. is made possible.

The lower part of the hopper 20 is connected to a closed container 36 so that particles 32 are constantly supplied and deposited at the bottom of the closed container 36 to about 1/3 of the height.

A particle gas transport passage 37 is connected to the ejector 23 by penetrating the upper lid of the closed container 36 .

The tip of the ejector 23 is connected to the particle supply passage 17' facing the test turbine wheel 2 at the mixing part 19 of the combustion gas passage 4, and the base is connected to the factory via the air supply passage 24. The compressed air source 25 is connected to the compressed air source 25.

In the middle of the air supply passage 24, there is a solenoid valve 2 which is electrically connected to a control device 26 and whose opening and closing are controlled.
7, a purge meter 28, and a flow rate adjustment valve 29 are interposed, and furthermore, a hopper 30' of a one-shot injection device 30 for explosively injecting particles 32 is interposed near the ejector 23.

The inside of the hopper 20 of the particle supply device 20 or the hopper 30' of the one-shot injection device 30 contains fine particles such as metal oxides that are separated and discharged from the exhaust system of the actual vehicle, such as the exhaust manifold. A predetermined amount of 32 groups of flaky particles with a distribution range of 0.1 to 2 mm are supplied in advance, and the output shaft of the upper motor 22' is connected to the closed container 36 facing the lower part of the hopper 20 of the particle supply device 20. A shaft 38 connected to the shaft 38 is inclined at a set angle with respect to the perpendicular line and is appropriately supported. Similarly, the shaft 38 is inclined at a predetermined angle, and as described above, it is embedded in the group of particles 32 accumulated at the bottom of the closed container 36, and the upper part is a particulate gas. It faces the suction port 37' of the transport passage 37, and is rotated from a predetermined low speed to high speed by the control device 26 of the motor 22' to fill the concave grooves of the feeder ring 40 with particles 32 one by one. It is sucked into the transport passage 37 and supplied to the ejector 23.

The arm 39 and feeder ring 40 form an individual feeder 41.

An air passage 42 is connected between the airtight container 36, the purge meter 28 of the air supply passage 24, and the flow rate adjustment valve 29, and a bias relay 43 is interposed in the middle of the air passage 42. and the ejector 23 are connected through an air passage 44, and a bias relay 43 connects the airtight container 3.
6 is set at a predetermined pressure by the ejector 23, for example,
The pressure is increased to about 0.1 to 0.5 Kg/cm ² , and the internal pressure of the sealed container 36 is raised to a set pressure using the internal pressure of the ejector 23 as a reference pressure, and air is supplied to the ejector 36 from the air supply passage 24.
The airtight container 36 is lower than the ejector 23.
Due to the air flow from the closed container 36 in the particle gas transport passage 37 to the ejector 23 due to the high The particles 32 can be sucked and supplied one by one to the ejector 23.

The particles 32 are continuously fed to the ejector 2 by the rotational speed of the motor 22 of the individual feeder 41.
3, the particles are mixed into the combustion gas from the particle supply passage 17' through the control device 26 of the flow rate adjustment valve 29 and the electromagnetic valve 27. It is possible to switch between continuous supply of particles 32 from the particle supply passage 17' and explosively supplying a large amount of particles 32 from the hopper 30' of the one-shot charging device 30 to the particle supply passage 17'. It is being done.

A safety passage 45 is connected between the closed container 36 and the burner 3 through a check valve, a check valve, etc.
7', hot air of combustion gas flows through the particle supply passage 17' to the particle gas transport passage 37.
This prevents damage to low temperature systems such as the airtight container 36 and the airtight container 36.

Further, 34, 34 are thermocouples that measure the temperature of the combustion gas in the combustion gas passage 4 and measure the temperature of the combustion gas in the combustion gas passage 4.
We are trying to manage the combustion of

Note that 35 is a lead wire, which is connected to the control device 26, motor 22, and electromagnetic valve 27 to electrically control them.

In the above configuration, compressed air and combustible fuel are supplied to the burner 3 for predetermined combustion, combustion gas is supplied from the combustion gas passage 4 to the test turbine wheel 2 of the turbocharger 1, and the combustion gas is detected by the thermocouples 34, 34. Based on the thermal management of the turbocharger 1, a long-term erosion durability test is conducted at predetermined high, medium, and low speed rotations.

In the meantime, the collision phenomenon with the turbine wheel 2 is artificially reproduced when metal particles or oxidized particles are mixed into the exhaust gas from the exhaust manifold of the exhaust system of the turbocharger installed in the actual vehicle. When carrying out the erosion durability test by applying impact loads simultaneously over a long period of time at a predetermined timing under various conditions, air from a compressed air source 25 in the factory is supplied to a solenoid valve 27 via a control device 26. Opening/closing and flow rate adjustment valve 29
By adjusting the above, a predetermined flow rate of compressed air is supplied from the air supply passage 24 to the hopper 20' and the one-shot injection device 3 over time.
The particles 32 are mixed into the combustion gas in the mixing chamber 19 of the combustion gas passage 4 from the particle supply passage 17' via the ejector 23 and collide with the test turbine wheel 2.

One is to control the rotational speed of the feeder ring 40 of the individual feeder 41 by the motor 22' from high speed to low speed by the control device 26, and by the ejector action of the ejector 23,
Furthermore, since the internal pressure of the sealed container 36 is set higher than that of the ejector 23 by a predetermined pressure by the bias relay 43, air is blown from the particle gas transport passage 37 to the ejector 23, thereby increasing the suction port of the particle gas transport passage 37. Particles 32 are sequentially placed in a row in the concave groove of the feeder ring 40 from 37'.
The particles 32 are suctioned and transported by air, and the particles 32 are supplied from the ejector 23 to the ejector 23, and the supply amount is changed in a predetermined manner over time to cause continuous radiation collision of the particles 32 against the turbine wheel 2.

The flow rate of compressed air during this time is measured by a purge meter 28.

Therefore, in an actual vehicle, particles such as oxidized particles may be unexpectedly and shockingly separated from the device and mixed into the combustion gas, but the control device 26 is not able to reproduce such a situation. motor 22'
and by opening the electromagnetic valve 27 at a predetermined speed to flow a large amount of compressed air under high pressure, and instantaneously opening the flow rate of the flow rate adjustment valve 29 to supply a large amount of air to the air supply passage 24. A large amount of the stored particles 32 are instantaneously supplied from the hopper 30' of the one-shot feeding device 30 to the ejector 23, and an impactful one-shot supply of particles 32 is performed to the turbine wheel 2.

Thus, the individual feeder 41 is driven by the motor 22'.
The flow rate changes from the number of particles 32 to continuous mass feeding from the closed container 36 over time by controlling the rotational speed of the feeder ring 40, and the large amount of particles 32 to be fed from the hopper 30' of the one-shot feeding device 30 are controlled in advance. Control of the rotational speed of the motor 22' according to a program determined by the control device 21, and the amount of opening and closing of the electromagnetic valve 27 and the flow rate adjustment valve 29, and the opening and closing speed thereof can be determined as desired or in advance. It is.

Erosion caused by each particle 32 hitting the test turbine wheel 2 one by one, continuous particle impact, and impactful explosive particle impact were also tested and recorded. In the same way, various data are recorded and can provide valuable data for research evaluation of durability such as strength for turbochargers installed in actual vehicles.

In the above-mentioned test process, the particles 32 from the hopper 20 are supplied and accumulated at about 1/3 of the depth in the closed container 36, as described above, so the individual feeder 4 is moved by the motor 22'.
Regardless of the slow rotation speed of one feeder ring 40, particles 32 are surely placed one by one in series in the groove of the feeder ring 40 and lifted up.
The particle supply passage 1 is caused by the ejector action of the ejector 23 upon reaching the suction port 37' of the particle gas transport passage 37 and the air blowing from the particle gas transport passage 37 due to the difference in internal pressure between the ejector 23 and the closed container 36.
7', the amount of decrease in the accumulated amount is detected as appropriate, and as mentioned above, the hopper 20
The shutter can be closed to prevent a decrease in the internal pressure of the closed container 36, and the particles 32 can be supplied to the hopper 20, and the lid can be closed and the shutter can be opened to supply the particles 32 to the closed container 36.

It goes without saying that the embodiment of this invention is not limited to the above-mentioned embodiments. For example, a continuous feeding device or a one-time feeding device may be equipped with multiple hoppers and feeder rings for each particle type and size. Alternatively, various embodiments can be adopted, such as attaching a pressure detection device to the ejector and hopper and connecting it to a control device.

Of course, the target turbocharger is not limited to a turbocharger installed in an automobile.

<Effects of the invention> As described above, according to this invention, the material and strength of the turbine wheel of the turbocharger can be simply evaluated in a long-term durability test device that obtains data on the strength of actual vehicle equipment such as a turbocharger installed in a car. In addition to long-term erosion tests of models such as mechanical bonding strength and mechanical joint strength, we also test individual to continuous or impact peeling of peeling particles and oxide particles from the exhaust system, similar to actual vehicles. It is possible to artificially reproduce conditions such as explosive collisions, and to stably measure and record the long-term intensity changes and erosion history of such phenomena in real vehicles over time. An excellent effect is achieved in that valuable evaluations such as strength and durability can be reliably obtained.

Moreover, because the durability test using combustion gas and the durability test using particle collision can be performed flexibly in conjunction with each other or independently from each other, various actual vehicle conditions can be reproduced and an integrated evaluation can be performed. This is an excellent effect.

Furthermore, compared to the conventional erosion durability test using particle collisions, particles mixed into the combustion gas due to air transport can be conducted at a high speed similar to that of an actual vehicle, so that the relative collision speed with the high-speed rotating test turbine wheel can be conducted at high speeds. This has the excellent effect of reproducing conditions that are close to those in actual vehicles, and providing valuable data for research on actual vehicles.

According to this invention, 0.1
Relatively large particles of ~2 mm in size, ranging from spherical to flaky, can be reliably supplied individually to continuously or in explosively large amounts regardless of shape. As a result, the various conditions of erosion in an actual vehicle can be reliably reproduced, resulting in the excellent effect that more accurate testing and data recording can be performed.

Furthermore, as mentioned above, during durability tests, particles can be supplied in very small quantities, such as one particle per hour, or continuously,
Moreover, the excellent effect of being able to freely control up to mass supply is achieved.

Further, even when changing the particles to be supplied, an excellent effect is achieved in that it can be easily dealt with.

In addition, since the particles from the particle supply device are supplied to the supply passage in variable and quantitative amounts per time, it is possible to ensure that there are no particles remaining in the particle supply passage after the end of the previous test, and therefore, the test is completed. This has the excellent effect that residual particles from the previous test are not emitted to the subsequently rotating turbine wheel, and there is no risk of data becoming unstable.

In addition, since there is no need to use high-pressure air to remove residual particles each time a test is performed, the particle yield is good.
This also has the effect of shortening the work cycle and improving testing efficiency.

[Brief explanation of the drawing]

Fig. 1 is a schematic partial cross-sectional schematic side view of an embodiment of this invention, Fig. 2 is a partially cut perspective view of an individual feeder, and Fig. 3 is a general schematic front view of the same particle supply device.
FIG. 4 is a cutaway side view of the same part, FIGS. 5 and 6 are schematic diagrams of a conventional turbocharger durability testing device, and FIG. 7 is a schematic sectional view of a conventional turbocharger chip erosion durability testing device. FIG. 8 is a schematic diagram of the durability test device devised by the prior application. 1... Turbocharger, 2... Turbine wheel, 4... Combustion gas passage, 3... Burner device,
18″……Turbocharger durability test device, 2
0''...particle supply device, 17'...particle supply passage,
24... Air supply passage, 23... Ejector, 3
6... Airtight container, 37... Particle gas transport passage, 3
7'...Entrance, 41...Individual feeder.

Claims (1)

[Scope of utility model registration request] A turbocharger durability test in which a test turbine wheel of a turbocharger is equipped with a burner connected to the combustion gas passage, and a particle supply device is connected to the combustion gas passage with the particle supply passage facing the combustion gas passage, and is also connected to an air supply passage. In the device,
An ejector connected to the particle supply passage and the air supply passage is connected to the airtight container via a particle gas transport passage, and inside the airtight container, particles are separated at the entrance of the particle gas transport passage and the bottom of the airtight container. A turbocharger durability test device characterized in that a feeder is interposed, and the internal pressure of the closed container is set higher than the pressure of the ejector.