JPH0732909Y2 - Supercharger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a supercharger.

[Prior Art] Currently, in order to improve the thermal efficiency of various prime movers, an exhaust gas turbine of the prime mover is rotated, a compressor is driven by the turbine to compress air, and the compressed air is supplied to the prime mover. A feeder is used.

FIG. 3 shows an example of the supercharger, in which a turbine impeller 2 is rotatably housed inside a spiral turbine casing 1, and a nozzle 4 composed of a plurality of nozzle blades 3 is arranged around the turbine impeller 2. The exhaust gas is taken in from the opening 5 of the turbine casing 1 and swirled into the turbine impeller 2 through the gap of the nozzle blade 3 to rotationally drive the turbine impeller 2.

Further, as shown in FIG. 4, the turbine casing 1 is divided into two by the casing partition plate 6 in order to effectively use the energy of the exhaust pulsating pressure of a prime mover, as shown in FIG. Many are designed to take in exhaust gas. In the case of such a supercharger, the central portion of each nozzle blade 3 constituting the nozzle 4 is also partitioned by the nozzle partition plate 7 provided on the extension of the vehicle compartment partition plate 6.

[Problems to be Solved by the Invention] However, in the above conventional structure, since the nozzle blade 3 is provided at the same position on the front and back sides of the nozzle partition plate 7,
The pulsating pressure of each exhaust gas passing through the two flow passages that divide the turbine casing 1 and the nozzle 4 into two parts simultaneously and periodically acts on the turbine impeller 2 to generate an exciting force, and the turbine impeller 2 is generated. There is a problem that unnecessary vibration is generated, and there is a fear that the life of the turbine impeller 2 may be shortened when the supercharger is used for a long period of time.

The present invention solves the above-mentioned problem. By shortening the cycle of the external force received by the turbine impeller and averaging the external force, the exciting force generated in the turbine impeller is reduced and unnecessary vibration is prevented. The purpose is to extend the life of the turbine impeller.

[Means for Solving the Problem] The present invention is directed to a nozzle partition plate located on an extension of the vehicle compartment partition plate and a nozzle partition located between the turbine compartment and the turbine impeller divided into two by the vehicle compartment partition plate. In a supercharger having a nozzle composed of a plurality of nozzle blades mounted on both sides of a plate, the nozzle blades provided on one side of the nozzle partition plate and the nozzle blades provided on the other side have mutually circumferential phases. The feature is that they are arranged so as to be displaced.

[Operation] Therefore, in the present invention, the exhaust gas flows from between the nozzle blades arranged on both sides of the nozzle partition plate so as to be out of phase with each other in the circumferential direction. A driving force is applied to the turbine impeller at a cycle substantially half that of a supercharger provided with blades, and the driving force is dispersed and averaged in the circumferential direction.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention, and the third embodiment
・ The parts with the same reference numerals as in Fig. 4 represent the same things.

The supercharger 8 of the present invention shown in the figure, like the conventional supercharger shown in FIG. 4 described above, divides the turbine casing 1 into two chambers by a compartment partition plate 6, and A flow path that effectively guides exhaust gases without interfering with each other
Formed 9,10. A turbine impeller 2 is rotatably supported at a central position of the turbine casing 1, and is located on an extension of the casing partition plate 6 between the turbine impeller 2 and the turbine casing 1. A ring-shaped nozzle partition plate 11 is provided, and a nozzle 14 is provided on both front and back surfaces of the nozzle partition plate 11, and a plurality of nozzle blades 12 and 13 are provided at equal intervals in the circumferential direction.

Here, the nozzle blades 12 and 13 are the nozzle partition plates 1
The front and back surfaces of 1 are arranged so as to be offset from each other by a half pitch in the circumferential direction. That is, as shown in FIG. 1, the nozzle blades 13 (shown by broken lines in FIG. 1) on the back surface of the nozzle partition plate 11 are arranged at the intermediate positions of the nozzle blades 12 on the front surface of the nozzle partition plate 11. It is set up.

According to the above configuration, when the exhaust gas from the prime mover (not shown) passes through the flow paths 9 and 10 and flows into the turbine impeller 2 between the nozzle blades 12 and between the nozzle blades 13, the nozzle partition plate 11 is used. Since they flow in from positions that are shifted by a half pitch between the front and back sides, the exhaust gases in the flow paths 9 and 10 alternately act on the turbine impeller 2 as a driving force.

That is, as compared with a conventional turbocharger in which the nozzle blades are provided at the same position on the front and back sides of the nozzle partition plate, the cycle of the driving force by the exhaust gas received by the turbine impeller 2 is shortened to approximately half, and The driving force is dispersed in the circumferential direction and averaged.

Therefore, the cycle of the driving force due to the exhaust gas received by the turbine impeller 2 can be shortened to approximately half and the driving force can be averaged, so that the exciting force generated in the turbine impeller 2 can be significantly reduced. The generation of vibration can be prevented and the life of the turbine impeller 2 can be extended.

The supercharger of the present invention is not limited to the above-described embodiment, but the nozzle blade may be provided with an angle adjusting mechanism other than fixing, and other aspects of the present invention are not deviated. It goes without saying that various changes can be made within the range.

[Effects of the Invention] As described above, the supercharger of the present invention can exhibit various excellent effects as described below.

(I) The cycle of the driving force acting on the turbine impeller can be shortened to about half as compared with the supercharger in which the nozzle blades are provided at the same position on both sides of the nozzle partition plate.

(II) Since the exhaust gas flows in between the nozzle blades provided so that the phases in the circumferential direction are shifted from each other on both the front and back sides of the nozzle partition plate, the driving force can be averaged in the circumferential direction.

(III) Due to the above (I) and (II), the exciting force generated in the turbine impeller can be significantly reduced.

(IV) By virtue of the above (III), it is possible to prevent the vibration of the turbine impeller from occurring, and thus the life of the turbine impeller can be extended.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a sectional view showing an example of a conventional supercharger. FIG. 4 is a sectional view showing another example of the conventional supercharger. In the figure, 1 is a turbine casing, 2 is a turbine impeller, 6 is a compartment partition plate, 7 is a nozzle partition plate, 11 is a nozzle partition plate, 1
2 and 13 are nozzle blades, and 14 is a nozzle.

Claims (1)

[Scope of utility model registration request] 1. A nozzle partition plate located on an extension of the vehicle compartment partition plate and mounted on both sides of the nozzle partition plate between the turbine compartment and the turbine impeller divided into two by the vehicle compartment partition plate. In a supercharger having a nozzle composed of a plurality of nozzle blades, the nozzle blades provided on one side of the nozzle partition plate and the nozzle blades provided on the other side may be arranged so that their phases in the circumferential direction are displaced from each other. Characteristic supercharger.