JPS6327070Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a blower housing for a supercharger.

In recent years, as indicated by the term product liability, there has been a demand for products that can protect customer safety against any unexpected accidents.

In a turbocharger, if the impeller rotating at high speed breaks and pierces the housing and flies out, it can cause a major accident. There is a need for a structure that will not allow the impeller to fly out even if it is damaged due to such reasons.

In order to reduce the weight of the blower housing in particular, aluminum alloy is generally used, but since aluminum alloy has low strength, it is difficult to protect the impeller from damage. Please note that the turbine housing is made of cast iron, so
Sufficient strength against turbine damage can be ensured.

A conventional measure against damage to the impeller on the blower side is to simply increase the wall thickness of the housing to provide enough strength to prevent the impeller from flying out even if the impeller is damaged.

For this reason, the blower housing is 3 to 5 times thicker than necessary for its functionality, resulting in disadvantages such as wasted material and increased weight. This becomes a problem in terms of weight, especially as the supercharger becomes medium to large, the larger the magnification becomes.

The present invention was developed with the above in mind, and by casting a ring-shaped steel wire into the housing wall of an aluminum alloy blower housing,
It is an object of the present invention to provide a blower housing for a supercharger, which has improved strength against impacts without increasing the weight of the housing, and can prevent scattering when an impeller breaks.

Embodiments of the present invention will be described below based on the drawings.

In the figure, 1 indicates the blower side of the supercharger, 2 is a blower impeller, and 3 is a blower housing. A plurality of ring-shaped steel wires 4 are cast inside the peripheral wall of the portion of the blower housing 3 that surrounds the blower impeller 2 and includes the throat minimum cross section. The steel wire 4 may be formed separately for each ring, but it may also be formed into an integral spiral shape that follows the shape of the peripheral wall.

The blower housing 3 is made of aluminum alloy casting, and the pouring temperature thereof is about 710° C., and the steel wire 4 is made of a steel material that does not transform or become dull at this temperature.

Since the present invention is as described above, the impact strength of the portion surrounding the blower impeller 2 including the minimum cross section of the throat of the blower housing 3 made of a light alloy such as an aluminum alloy is improved, and the impeller 2 is It is possible to prevent this from scattering when it is damaged, and to ensure the safety of customers. Further, according to the present invention, a steel wire is used as a reinforcing member for reinforcing the blower housing 3, and the steel wire 4 is cast into the peripheral wall of the portion surrounding the blower impeller 2, so that the reinforcing member is Assembling is performed at the same time as casting of the blower housing 3, the number of man-hours required for assembling the reinforcing member is reduced, and the appearance of the blower housing 3 is not impaired by the reinforcing member.

[Brief explanation of drawings]

The drawings are cross-sectional views showing embodiments of the present invention. 1 is a supercharger, 2 is a blower impeller, 3 is a blower housing, and 4 is a steel wire.

Claims (1)

[Scope of utility model registration request] A blower housing for a supercharger made of a light alloy such as an aluminum alloy, characterized in that a ring-shaped steel wire is cast into the peripheral wall of the portion surrounding the blower impeller 2, including the throat minimum cross section. Turbocharger blower housing.