JPS60198306A - Controller for variable guide vane in supercharger and like - Google Patents

Abstract

PURPOSE:To decrease rotation error of a guide vane and to enable decrease in the size of a housing, by providing a lever, coupled with the support axle of the guide vane by means of a pin, and a link which intercouples the sides, opposite to the support axle, of the levers circumferentially at one intervals by means of a pin. CONSTITUTION:A plurality of guide vanes 23 are monted to a shroud 22 through a bush 25 of a support axle 24. In which case, a lever 26 is coupled with the suppport axle 24 by means of a pin, and a link 27, consisting of two systems 27a and 27b, is disposed to the surface and the back of the lever 26. The link 27 couples together the levers 26 at one intervals and the levers are in an annular shape. In this constitution, the levers 26 and the link 27 form a parallelogram. Thus, rotation of one lever 26 enables other levers 26 to be rotated by the same angle. This reduces rotation eror of the guide vane 23 due to accumulation of clearance between the lever 26 for moving the guide vane 23 and the link 27, and also permits a decrease in the size of a housing 21.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a control device for variable guide vanes such as a supercharger.

[Prior art]

Figure 1 is a sectional view of the main parts of the turbocharger, Figure 2 is from ■ to ■ in Figure 1.
FIG.

Centrifugal compressors, flow turbines, superchargers, etc. use variable guide vanes to control the amount of air flowing in. In the drawings, 1 is a supercharger, 2 is a housing, 3 is a shroud, 4 is a turbine wheel, and 5 is a
is a flange, and 6 is a guide wing. A plurality of guide vanes 6 are attached to the shroud 3 via bushes 8 on the support shaft 7. 9 is a lever, 10 is a ring, and 11 is a pin.

Here, the angle α between adjacent levers 9 is 360° α = (N: number of blades), and if the angle between the pins 11 on the lever 9 is set to α, then the angle α between the pins 11 on the lever 9 is set as Lever 9 as shown
and the link 10 can form a parallelogram.

Therefore, if one of the levers 9 is connected to another link mechanism and rotated, the other levers can also be rotated by the same angle.

[Problems with conventional technology]

1) Adjacent levers 9 are connected by links 10, so in order to avoid interference between the links 10, the levers 9 become longer and the housing 2 must be made larger.

2) Since adjacent levers 9 are connected by links 10, the number of links is large, and looseness may accumulate in the attachment of each lever 9 and link 10, resulting in an error in the rotation angle of the guide vane 6.

[Purpose of the invention]

It is an object of the present invention to solve the problems of the conventional device described above, to reduce the rotation error of the guide vane due to the accumulation of play between the lever and the link that moves the guide vane, and to reduce the size of the housing of a supercharger etc. The present invention provides a control device for a variable guide v.;4.

[Summary of the invention]

The levers are connected every other lever to form two lines on the front side and the back side, and a connecting mechanism that can be applied even when there is an odd number of guide vanes is adopted, so that the above object can be achieved.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 to 8. 3 and 4 show the gluing/gluing process when there is an even number of guide vanes. Figure 3 is a structural diagram of the link mechanism that connects the guide vanes, Figure 3 is a view from the ■ arrow in Figure 4, Figure 4 is the IV in Figure 3.
-IV sectional view.

5 to 8 show link processing when there is an odd number of guide vanes, FIG. 5 is a drawing corresponding to FIG. 3 of the conventional example, FIG. 6 is a rear view of FIG. 5, and FIG. FIG. 5 is a view taken along the arrow ■, and FIG. 8 is a sectional view taken along the line ■-■ in FIG.

In the figure, 21 is a housing, 22 is a shroud, 23 is a guide vane, 24 is a support shaft, 25 is a push-piece, 126 is a lever, 27
is a ring, and 28 is a pin.

The links 27 are provided on the front and back sides of the lever 726.
The levers 26 are formed in a ring shape by connecting every other lever 26 in two series. (Hereinafter, the series on the front side will be suffixed J, and the series on the back side will be suffixed with b.) Here, the adjacent lever 26
The angle α between the pin 28 on the lever 26 is
If the angle between them is set to β=2α, the lever 26 and the link 27 form a parallelogram as shown by the two-dot chain line B in FIG. Therefore, when one lever 26 is rotated, the other levers 26 can also be rotated by the same angle.

Next, the connection mechanism of the link series on the front side and the back side will be explained.

If there is an even number of guide vanes, the number of each series on the upper front side and the back side must be the same, and one of the levers 27a on the front side and the lever 27a on the back side
If 1 and 27b are interlocked with another linkage mechanism,
The guide vanes 23 can be rotated at the same time, but if there is an odd number of guide vanes 23, some will be left over, so simply
Cannot be concatenated every other time.

Below is section 5 about link processing when there is an odd number of guide vanes.
This will be explained with reference to Figure 8. For convenience of explanation, the subscripts 1.2.3 are added to links and pins.

30 is a link.

The link 30 has a flat part 31 located on the front side, a flat part 32 located on the back side, and an upper surface part 33 that connects to the flat parts 31 and 32.
and 34 connected to the flat part 31 and connected to other link mechanisms. Note that appropriate notches and heights are provided in the above-mentioned 31, 32, and 33 so as not to interfere with the lever 26 and the link 27. 35 is Stotsunoya.

The link 30 is connected by a front side lever 26a1 and a pin 28a2, and a back side lever 26b2 and a pin 28b3.

Next, the operation of the above embodiment will be explained.

If there is an even number of guide vanes, the guide vanes can be rotated simultaneously by interlocking with each one of the front and back series of links (by means of other link mechanisms).

When there is an odd number of guide vanes, by operating the link 3o by another sliding mechanism, the front and back series of links can be operated simultaneously to rotate the guide vanes.

〔Effect of the invention〕

1) By connecting every other link to form two series, the angle between the lever and the pin is twice that of the conventional device, and the height of the lever can be lowered. Miniaturization can be achieved.

2) Since the number of links is halved in each series on the front side and the back side, the accumulation of looseness in the mounting of each link and lever can be suppressed to a minimum, and the rotational error of the guide vanes is reduced, improving accuracy.

3) When there is an odd number of guide vanes, there is also an odd number of levers.In normal connection, one is connected regularly, but with the connection means of the present invention, all the levers are connected every other lever. This allows the guide vanes to rotate smoothly.

[Brief explanation of drawings]

1 to 2 are related to a conventional device, and FIG. 1 is a sectional view of a main part, FIG. 2 is a sectional view taken along the line ■-■ of FIG. 1, and FIGS. Figure 4 shows the structure of the link mechanism that connects the guide vanes in two series (front and back) (Figure 3 is a view from the ■ arrow in Figure 4), and Figure 4 shows the case where there is an even number of guide vanes. Third
It is a sectional view taken along IV-IV in the figure. 5 to 8 show link processing when there is an odd number of guide vanes, FIG. 5 is a drawing corresponding to FIG. 3 of the conventional example, FIG. 6 is a rear view of FIG. 5, and FIG. 5 is a view in the direction of the ■ arrow, and FIG. 8 is a sectional view taken along the line ■-■ in FIG. 23...Guide blade, 24...Spindle, 26...Lever, 27...Link, 28...Bin. Figure 1

Claims (1)

[Claims] In a supercharger in which a guide vane is rotatably provided around its spindle to change its entrance/exit angle, a lever is connected to each spindle with a pin, and the side opposite to the spindle of the lever is attached to the circumference. A control device for a variable guide vane in a supercharger, etc., characterized by having links connected by pins every other direction.