JPS6318721Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of an exhaust turbine supercharger.

FIG. 1 is a cross-sectional view showing the main parts of a conventional exhaust turbine supercharger on the blower side. In the figure, a front blade 5 on a rotor shaft 7 driven by an exhaust turbine;
The impeller 6 compresses fresh air from the outside, and the differential user 4' supplies the pressure and air volume required by the diesel engine to the outer whirlpool chamber 1 and the inner whirlpool chamber 2. are fixed with bolts 20. The pressure and air volume required by the diesel engine are determined by the turbocharger's differential user 4.
Matching is performed by a combination of the front blade 5 and the impeller 6, but fine adjustment is usually performed by the differential user 4'. In this case, the differential user 4' is 1
Since it is this type, there are many types of specifications required. Even if matching calculations are performed using the best current computers, two specs of diff users 4' are required before and after the planning point. The increase in construction time, cost, inventory, etc. required to manufacture this increases the overall cost of the supercharger. Additionally, it has the disadvantage of resulting in wasted investment.

The purpose of this invention is to match specs 3 to 5 when matching a diesel engine and an exhaust turbine supercharger.
This invention provides a structure of an exhaust turbine supercharger that can reduce costs and replacement costs by incorporating the specs of the differential user 4' required before or after operation, instead of requiring a single type of differential user 4'. The feature is that in an exhaust turbo supercharger that has a differential user in the passage between the impeller of the blower driven by the exhaust turbine and the vortex chamber, the differential user is formed by dividing the A differential user disk and a differential user blade installed in the passage, a disk-shaped boss portion provided on the differential user blade to which a positioning pin is fixed, and a through hole provided in the differential user disk facing the boss portion. an adjustment flange provided with a circular protrusion that is fitted and can be screwed coaxially with the boss, and a peripheral part that can be attached to and detached from the differential user disk via a positioning pin in the circumferential direction; , a plurality of positioning pins are provided in the circular protrusion of the adjustment flange in the circumferential direction, and the positioning pins of the boss portion are fitted into the positioning pins so that the angle at which the differential user blade is attached to the differential user disk can be adjusted. It has a hole.

In this case, the inlet angle, inlet and outlet widths of the diffuser blades can be appropriately selected using the adjusting flange.

The present invention can be widely applied to air compressors, gas turbines, exhaust turbine superchargers, gas compressors, and centrifugal pumps.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 2a is a sectional view showing the main part on the blower side of an exhaust turbine supercharger according to an embodiment of the present invention, Fig. 2b is a view taken along the line A-A in Fig. 2a, and Fig. 3a is a A sectional view showing how the adjustment flange and the differential user blade are attached to the differential user disk, FIG. 3b is the third
Figure a is a plan view of figure a;

In the figure, numerals 1, 2, 3, 5, 6, and 7 indicate the same members as in FIG. 1 showing the conventional example.

The conventional differential user 4' installed in the passage between the impeller 6 and the vortex chamber is divided into a differential user disk 4 installed in the passage and a differential user blade 9 connected to the differential user disk 4.
It is divided into two parts.

The diff user blade 9 is provided with a disk-shaped boss portion 9a on its front edge side, and a positioning pin 13 is fixed to the boss portion 9a, and a screw hole is provided in the center into which a screw 12 is screwed through a spring washer 15. It is set up.

The adjustment flange 10 is provided with a circular protrusion having the same diameter as the boss portion 9a, and the circular protrusion has an appropriate number of positioning pin holes 13a spaced apart in the circumferential direction into which the positioning pins 13 are inserted; A screw insertion hole coaxial with the screw hole of the boss is provided in the center, and a parallel pin 14 for positioning with the differential user disk and a bolt hole for a fixing bolt 11 are provided in the periphery. It is provided.

The differential user disk 4 is provided with a through hole, into which the boss portion 9a of the differential user blade and the circular protruding portion of the adjustment flange are fitted facing each other, and the positioning pin 13 is inserted into the selected pin hole 13a. By fixing with bolts 11 and 12, the diffuser blade 9 is attached to the differential user disk 4 at a predetermined attachment angle, that is, an inlet angle α°, an inlet width a, and an outlet width b.

The O-ring 8 is brought into close contact with the bearing stand 15 via the diffuser disk 4 in order to prevent leakage of pressurized air and vibration of the diffuser blades 9.

The operation in the case of the above configuration will be described.

Fresh air is sucked in from the inner cylinder side of the guide casing 3, compressed by the rotational force of the front blade 5, impeller 6, and rotor shaft 7, and further increased in pressure by the differential user disk 4 and differential user vane 9, and then released into the vortex outer chamber. 1
The pressure and air volume necessary for the diesel engine are supplied through the spiral chamber 2.

When it becomes necessary to change the specifications of the differential user, remove the guide casing 3 and open the whirlpool inner chamber 2.
Pull it out by about 5 to 10 mm, remove the bolts 11, 12 and spring washer 15 that fix the adjustment flange 10, and adjust the entrance angle α° (standard) of the differential user blade 9.
Therefore, by selecting the spec to +1 or -1 using the positioning pin 13 and assembling in the reverse order of disassembly, it is possible to easily change the entrance angle α°, the entrance width a, and the exit width b. In this case, the inner diameter of the diffuser blade 9 becomes the reference for everything.

Pitch of differential user blades: θ=360°/number of blades Z. If adjustment is not possible using the positioning pin hole 13, the adjustment flange 13 with a different entrance angle α° (reference) can be made in place of the diffuser blade 9, and can be easily rearranged to any required angle.

The present invention as described above has the following effects.

When changing the differential user when matching a diesel engine and an exhaust turbine supercharger, it is possible to easily create the required specifications by replacing the inexpensive adjusting flange instead of replacing the differential user and by selecting the positioning pin hole. can. That is, (1) The cost is low.

(2) Diff user specifications can be easily changed by small disassembly of the exhaust turbine supercharger on the diesel engine.

(3) Adjustment flange 10 can be reused.

(4) Adjustment flange 10 adjusts differential user blade 9
The entrance angle α°, the entrance width a, and the exit width b can be selected and used.

(5) Can be adjusted without removing the differential user.

In the above embodiment, a boss (mounting hole) is provided on the inner diameter side of the differential user blade, but by arbitrarily selecting the position of this boss, the same diameter as in the same embodiment can be achieved based on the selected diameter. (Depending on the reference diameter selected in relation to the vortex inner chamber, specifications may not be able to be changed until the differential user is removed.)

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the main parts of a conventional exhaust turbine supercharger on the blower side, and Figure 2a is a cross-sectional view of a conventional exhaust turbine supercharger according to the present invention.
A cross-sectional view showing the main parts on the blower side of the exhaust turbine supercharger of the embodiment, FIG. 2b is a view taken along the line A-A in FIG. 2a, and FIG. FIG. 3b is a sectional view showing the attached state of the diffuser blade, and FIG. 3b is a plan view of FIG. 3a. 4... Differential user disk, 9... Differential user blade, 9a... Boss portion, 10... Adjustment flange, 11, 12... Bolt, 13... Positioning pin, 13a... Positioning pin hole.

Claims (1)

[Scope of utility model registration request] In an exhaust turbine supercharger having a diff user in a passage between an impeller and a whirlpool of a blower driven by an exhaust turbine, a diff user disk and a diff user vane formed by dividing the diff user and mounted in the passage , a disc-shaped boss part provided on the differential user blade to which a positioning pin is fixed; a disc-shaped boss part provided on the differential user disk, which is fitted into a through hole provided in the differential user disk facing the boss part and screwed on the same axis as the boss part; An adjustment flange provided with a circular protrusion that can be attached to and a peripheral part that can be attached to and detached from the differential user disk via circumferential positioning pins; The exhaust turbine filter is characterized in that a plurality of positioning pin holes are provided in the boss portion and the positioning pins of the boss portion are inserted thereinto so as to be able to adjust the attachment angle of the differential user blade to the differential user disk. Feeder structure.