JPH02251735A - Spinproof tester of turbocharger and testing method using said tester - Google Patents

Abstract

PURPOSE:To make it possible to perform a spinproof test simply by providing a bearing means comprising floating metals which can directly support a metal turbine shaft to a bearing housing. CONSTITUTION:When a turbocharger rotor is assembled to a spinproof tester, at first, a turbine housing 4 is removed. The tip of a metal turbine shaft 5 is made to pass through floating metals 2-1 and 2-2, a thrust bearing part 10 and a ring seal part 11 and made to protrude to the outside of the seal part 11. Under this state, a sleeve 12 is inserted through the tip of a protruding metal turbine shaft 5 to a position where the sleeve comes contact with the ring seal part 11. Thereafter, a lock nut 13 is screwed to the shaft 5. A ceramic turbocharger rotor is mounted on the spinproof tester. Thereafter, the housing 4 is mounted on a bearing housing 1. The entire turbocharger is rotated at a high speed by feeding, e.g. a high-speed gas, into the housing 1. Thus the test can be conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a spin proof tester for a turbocharger having a ball bearing supported ceramic turbocharger rotor and a test method using the same.

(Prior Art) When actually using a ceramic turbocharger rotor constructed by joining a ceramic turbine rotor and a metal turbine shaft, it has conventionally been supported by a floating metal within a bearing housing, or supported by a floating metal within a bearing housing.
It is well known that it is supported by ball bearings.

Among these, the type supported by ball bearings is
Although the rotational responsiveness is good, the bearing structure 21 is complicated as shown in FIG.

Before this turbocharger rotor is actually assembled into a device, it is necessary to conduct a spin proof test, and various testing devices for this purpose have been known. Among these, as an inspection device for ceramic turbocharger rotors that are supported by ball bearings, it is difficult to use a bearing housing for ball bearings because the inner race of the ball bearing fitted into the metal shaft is difficult to remove during disassembly. Japanese Patent Application Laid-Open No. 6319291 using a housing for float metal
A turbocharger inspection device and inspection method described in Japanese Patent No. 5 are known.

(Problems to be Solved by the Invention) In the inspection device described in Japanese Patent Application Laid-open No. 192915/1983, an existing bearing housing supported by a floating metal is used as the inspection device, so there is no space between the metal shaft and the floating metal. It incorporates a cylindrical jig. In other words, in order to match the diameter of the floating metal support to the diameter of the metal shaft of a ball bearing supported turbocharger, a cylindrical jig was installed in the test equipment in advance for the support and a spin proof test was carried out. It is configured so that it can be implemented.

However, with the inspection apparatus described in JP-A-63-192515, unbalance occurs in the spin proof test unless the clearance between the two-stage cylindrical jig into which the metal shaft is inserted and the metal shaft is made very small. , there was a problem that the correct test could not be conducted. Since this cylindrical jig has approximately the same length as the metal shaft and has a stepped structure, it is difficult to process it with high precision. In extreme cases, if the machining accuracy is poor, the ceramic turbine rotor may be damaged due to this imbalance.

In addition, in connection with the above-mentioned clearance, there is also the problem that careful attention is required when mounting the metal shaft on the cylindrical jig, which is time consuming.

An object of the present invention is to solve the above-mentioned major problems and provide a spin-proof tester for a ball bearing supported turbocharger that can easily perform a spin-proof test, and a test method using the same. It comes out.

(Means for Solving the Problems) The turbocharger spin proof tester of the present invention includes:
A turbocharger spin proof tester having a bearing housing rotatably supporting a ceramic turbocharger rotor configured by joining a ceramic turbine rotor and a metal turbine shaft via a ball bearing, the bearing housing being ,
It is characterized by comprising a bearing means made of floating metal that can directly support a metal turbine shaft.

In addition, the test method of the present invention uses the turbocharger spin-proof testing machine described above to carry out a spin-proof test by rotating the turbocharger's metal turbine shaft at high speed while directly supporting it with bearing means made of floating metal. It is characterized by:

(Function) In the above-described configuration, the ball bearing support type turbocharger spin proof tester of the present invention has the following features:
Since the floating metal bearing means of the bearing housing forms a dedicated bearing means that can directly support the metal turbine shaft, the ceramic turbocharger rotor can be easily mounted on the testing machine.

Therefore, according to the test method using the spin proof tester of the present invention, an accurate spin proof test can be easily carried out as in the conventional method.

(Example) FIG. 1 is a diagram showing the configuration of an example of a spin proof tester for a ball bearing supported type turbocharger of the present invention, together with a state in which a ceramic turbocharger to be tested is assembled. The test machine of this example has almost the same configuration as a conventional floating metal support type turbocharger. That is, in Figure 1,
The bearing housing 1 is provided with floating metals 2-1, 2-2 as bearing means, and the ceramic turbine rotor 3 side is provided with a turbine housing 4.
Further, the metal turbine shaft 5 side is closed by a retainer 6 and a seal ring 7.

The features of this embodiment are floating metal 2-1.2-
The inner diameter of the floating metal 2-1 is set to be slightly larger than the outer diameter of the metal turbine shaft 5 to be supported.
．． 2-2 makes it possible to directly support the metal turbine shaft 5, the thrust bearing part 10 has a stepped part 9 that engages with the thrust metal 8, and the ring seal part 11 makes contact with the retainer 6 and the seal ring 7. This point is provided in advance as shown in FIG.

The method for assembling the turbocharger rotor in which the ceramic turbine rotor 3 and the metal turbine shaft 5 are joined to the spin-proof tester having the above-described structure is as follows. First, remove the turbine housing 4, and connect the tip of the metal turbine shaft 5 to the floating metal 2-
1.2-2. Pass through the thrust bearing part 10 and the ring seal part 11 and project to the outside of the ring seal part 11.

In this state, the sleeve 12 is inserted from the tip of the protruding metal turbine shaft 5 to a position where it abuts the ring seal portion 11. Thereafter, the lock nut 13 is screwed onto the metal turbine shaft 5, and the ceramic turbocharger rotor is mounted on a spin proof tester.

Thereafter, the turbine housing 4 is attached to the bearing housing 1, the entire turbocharger is rotated at high speed by means such as supplying high-speed gas into the bearing housing 1, and a spin proof test is performed in the same manner as in the conventional method. The test can be carried out in the same way. After the test, the turbocharger rotor can be taken out from the test machine by releasing the lock nut 13 and removing the turbine housing 4.

According to the spin-proof tester of the present invention and the test method using the same described above,
Compared to the inspection device disclosed in Publication No. 15 in which a cylindrical jig is pre-assembled, the insertion and assembly of the ceramic turbocharger rotor into the bearing housing becomes easier and shorter, and Removal of the turbocharger rotor is similarly easy and quick. Furthermore, although a cylindrical jig is used, it is simply cylindrical in shape and short in length, making it easy to manufacture and having a small mass, resulting in less imbalance during assembly.

(Effects of the Invention) As is clear from the above description, according to the turbocharger spin proof tester of the present invention and the test method using the same, the metal turbine shaft of a ball bearing supported ceramic turbocharger rotor can be directly tested. Since it has a dedicated spin-proof testing machine that can be supported by floating metal, the turbocharger can be easily installed on the testing machine, making it possible to easily perform spin-proof tests similar to conventional ones.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an example of a spin-proof tester for a turbocharger according to the present invention, and FIG. 2 is a diagram showing an example of a conventional ball bearing supported type turbocharger. 1... Bearing housing 2-1.2-2... Floating metal 3... Ceramic turbine rotor 4... Turbine housing 5... Metal turbine shaft 6... Retainer 7... Seal ring 8 ...Thrust metal 9...Step part 10...Thrust bearing part 11...Ring seal part 12...Sleeve 13...Lock nut Fig. 1

Claims (1)

[Claims] 1. A turbocharger spin proof tester having a bearing housing that rotatably supports a ceramic turbocharger rotor formed by joining a ceramic turbine rotor and a metal turbine shaft via a ball bearing. A spin-proof tester for a turbocharger, wherein the bearing housing includes a bearing means made of a floating metal that can directly support a metal turbine shaft. 2. Using the turbocharger spin-proof tester according to claim 1, a spin-proof test is carried out by rotating the turbocharger's metal turbine shaft at high speed while directly supporting it with a bearing means made of floating metal. Characteristic test method.