US1894054A

US1894054A - Supercharger casing

Info

Publication number: US1894054A
Application number: US307518A
Authority: US
Inventors: Noble Warren
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-09-21
Filing date: 1928-09-21
Publication date: 1933-01-10
Anticipated expiration: 1950-01-10

Description

Jan. 10, 1933. w. NOBLE 1,894,054

SUPERCHARGER CASING Filed Sept. 21. 1928 2 Sheets-Sheet .'1

gmanto'z Wa we/W Jan. 10, 1933. w, NOBLE 1,894,054

SUPERCHARGER CAS ING Filed spt. 21, 1928 2 Sheets-Sheet 2 atto'tweq Patented Jan. 19, 1933 ATENT WARREN NOBLE, 0F DETROIT, MICHIGAN SUERCHARGER CASING Application filed September 21, 1928.

This invention relates to superchargers or rotary induction means and particularly to the casings thereof, and has for its object to provide a casing which will be eflicient in gas distributing action, cheap to manufacture and capable of permitting an outlet therefrom at a plurality of points in order to equalize pressures in the inlet manifold of an engine.

Heretofore it has been customary to build a spiral or snail shaped casing having fixed guide vanes therein. The drawbacks to such a structure are that only one outlet can be effectively had therefrom so that in using a ring manifold as, for instance, in a radial engine, there is always diiiiculty in getting a charge in the cylinders furthest from the supercharger approximating that in those cylinders adjacent the supercharger; and also that the conventional structure is rather difiicult and expensive to manufacture, due to the fixed vanes, and to the odd shape.

It has been found in practice that it is possible to obtain results which compare very favorably with those obtained by the conventional type by using such a fan as described in my copending application, Serial Number 507,517, filed September 21, 1928, in conjunction with a more or less oval shape casing and allowing a substantial distance between the narrow portion of said casing and said blade tips. While it is not necessary to use the fan described in the copending application above referred to, its use serves to illustrate the efficiency of the casing herein described, because of the lack of blade tip air scoops on said fan, so that in view of the fact that it operates efficiently with this type fan it will operate very efiiciently with the types of fans now in use.

In the supercharger it is necessary to convert the kinetic energy of motion possessed by the gas or air into pressure. In order t accomplish this it is first necessary to get sufficient volume by the action of the blades Serial No. 307,518.

and then to build up a pressure in the mani fold by means of inner air scoops traveling at high velocity. It is found that it is not necessary to stop the gases as by the use of fixed vanes, but that by merely permitting the gases to flow into an odd shaped casing, such as the one shown herein, they may be readily picked up by the throats of the fan hub in combination with the fan blades and thereupon put under pressure as indicated.

Since this condition is true, there is no reason for the use of a snail shaped structure, hence the air or gas under pressure may be taken off at two different points in the casing. Thus a ring manifold may be fed from both directions, so that the total distance of feeding any cylinder is exactly the same as the total distance of feeding for every other cylinder and an even charge is assured in every cylinder.

Such a casing may be stamped or cast very readily, so that the cost of manufacture is greatly reduced.

A better understanding of the invention will be had with reference to the accompanying drawings, wherein:

Figure 1 is a view in side elevation of a supercharger casing according to the present invention, parts being broken away to show interior construction.

Fig. 2 is a view taken at right angles to Fig. 1, the casing being shown partly in ele vation and partly in section.

Fig. 3 is a sectional view taken vertically through the axis of the structure shown in Fig. 2, the casing being shown attached to the engine.

Referring more particularly to the drawingsz Numeral 1 indicates a supercharger casing attached to an engine by bolts 2. The casing 1 has a peripheral channel 3, preferably more or less rectangular in cross section as shown in Figures 1 and 3. Detachably mounted on the channel is a gas or air inlet passage l, which is of substantially cylindrical shape and flared outwardly at to engage the sides of the casing channel and to be secured thereto by means of bolts 6. lVitliin casing 5 is a fan 7 mounted on a shaft 8, which is driven by a gear 9. Blades 10 of fan 7 are so shaped as to assume the general contour of the flared portion 5 of inlet passage l, and to terminate at the channel inlet.

Casing 5 may be br adly described as bein of an oval shape so that a vertical section thru its axis will show a diameter equal to the diameter of the fan, plus the width of channel 3, while a horizontal section thru the axis will show a diameter substantially larger. At each of the enlarged ends I provide takeoffs or outlets 11 leading to a manifold 12, which may be a ring manifold and hence close on itself so that gas under pres sure is fed from two directions therein. Equal pressure is insured in the manifold by a connecting passage 13.

In operation, air or gas at high velocity enters at 4 and is driven inwardly by the airscoops on fan blades T against the walls of channel 3 where it put unc or pressure by lb the action of fan blades 7, together with the fan blade throats, and is then forced thru outlets 11 into manifold 12.

The term supercharger is used herein and in the claims is intended to include rotary induction means.

While I have illustrated only one embodiment of my invention it will be understood that various changes may be made without departing from the spirit of the invention, and I therefore desire to be limited only by the scope of the appended claims, in which:

I claim:

1. In combination, a ring inlet manifold and means for equalizing the pressure at various points in said manifold, said means comprising a plurality of inlets adapted to inlet a fluid in opposed direction at different points around said manifold.

2. In combination, a ring inlet manifold for an internal combustion engine and means for equalizing the pressure at various points in said manifold, said means comprising a supercharger casing interposed in said manifold, said casing having a plurality of outlets feeding said manifold at a plurality of points said outlets directing air therefrom in opposite direction.

3. In combination, a ring inlet manifold and means for equalizing the pressure at various points in said manifold, said means comprising a supercharger casing interposed in said manifold, said casing having a plurality of inlets each feeding said manifold in a direction opposed to another inlet.

4. In combination, a ring inlet manifold for an internal combustion engine and means for equalizing the pressure at various points in said manifold, said means comprising a supercharger casing interposed in said manifold, said casing being of elliptical conformation and having an outlet at each end of the greatest diameter thereof, said outlets feeding air to said manifold from opposite directions.

5. In combination, an inlet manifold having a plurality of widely separated inlets and a supercharger casing attached to said manifold, said casing having a plurality of outlets coinciding with the inlets in said manifold whereby air is fed into said manifold from a plurality of points in an opposed direction to equalize the pressure therein.

In testimony whereof I afiix my signature.

WARREN NOBLE.

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