US1793903A - Supercharger structure - Google Patents

Description

Feb. 1931. w, BURGESS 1,793,903

SUPERCHARGER STRUCTURE Filed Feb. s, 1928 r 2 Sheets-Sheet 1 17? 0677207" W'ali'ar .76. B u'ztess JZZZOrney Feb. 24, 1931. w. K. BURGESS 1,793,903

SUPERCHARGER STRUCTURE 2 1928 2 Sheets-Sheet 2 Filed O water/K2521?" ears rn y Patented Feb. 24, 1931 j UNITED srATEs PATENT; OFFICE.

l 1L Bananas, or snrrn Monica, oa'mromna surnacnaaena sraoo'ruaa Application flied February 3, 1928. Serial No. 251,816.

This invention relates to a turbine air compressor andsupercharger for internal comustion engines, and has for its object to providea device of this class which is particuf6 larly simple in constructiom'positive andefwith certain improvements for efiecting a the casing,

- olted together at 7 As shown in i piston tight seal between the impeller and assists in complete vaporization of theli u1d fuel, and increases the compression of t e gas to a high point of efficiency.

The invention further consists of certain other details of construction and combinations of parts, all of which will be first fully described and afterwards specifically pointed out in the appended claims.

Referring to the'accompanying drawings:

Fig. 1 is a side elevation partly in vertical section of the device constructed in accordancewith my invention.

,partly in elevation of the device, and

Fig. 3 is a transverse sectional view through one of the blades of the impeller.

Like numerals of reference\ indicate the same parts throughout the several figures, in which:

1 indicates the device, which includes the impeller 2 and easing 3, which casin is comosed of two sections 4 and 5 havin anges 6 1, the

casing 3 1s provided with a tangentia outlet 8, flanged at 9 to receive a check valve or other fitting as may be desired.

The central portion of'the casing portion 5, is rovided with a true Venturi opening 10, to w ich a carburetting device may be at tached inany approved manner.

it a packing nut 13.

Centrally of the complemental casing por-' tion is a housing 11, threaded at 12 to. receive Within said housing 11, I dispose two ballbearing races 14 and 15, spaced apart by a 1 bearing-spacer 16, while against each of said races 14 and 15, I provide a felt washer 17 to be compressed by the provide an oil tight assem 1y. 1,

Connected to t e housing 11 is an oil feed line :18, preferably from the oil pressure sys tem of the motor to which the device is attached, while the bearing spacer 16 is perforated to permit oil under pressure from the feed line 18 to enter within the spacer 16, which forms an oil chamber 19.

- The impeller 2 includes a plurality of radial blades 20, radiating from a hub 21, mounted acking nut 13 to on a hollow drive shaft 22 running on the bearings 14 and 15, which shaftis erforated at 23 to receive oil from the oil c amber 19 within the same. Connecting with the said hollow shaft 22 are oil ports-24 disposed in the impeller blades near each edge thereof, as shown in Fig. 3, while the actual edges of said blades are provided with a V shaped oil groove 25 which communicates with the said oil orts 24 at predetermined points as shown in ig. 2.

The casing 3 is shaped to form an annular tubular-like chamber 26 at its outer extremity, while the same is sharply reduced at 27 to rovide a Venturi formation immediately ad acent to and opening into said tubularlike chamber 26.-

The blades 20 of the impeller 2 are formed to closely conform to the shape of the casing and preferably so as to provide a clearance of not more than .006", though those ortions of the impeller blades 20 immediate y adjacent the outer venturi 10 are formed with straight vertical edges 28 so as to provide ample spaces between the impeller blades 20 to receive the gas passing through the said venturi 10.

Having thus described the invention its operation is as follows:

The gas passingthrough the'venturi 10 is accelerated and enters the chambers formed between the blades '20 of the impeller 2. B

in'the impeller adjacent the outer venturi 1*0,

and increases the acceleration of the pas passing through said outer venturi 10 an into the impeller 2.

The efiective compression of the gas and efficiency of the entire device is increased by the oil seal which is established within the V shaped grooves in the edges of the 1111-. peller blades 20, which oil seal is efiectively maintained by the oil pressure from the oil line 18 augmented by centrifugal force carrying the oil from the oil chamber 19 outwardly through the oil ports 24 and into the V shaped oil grooves 25. By this construction, a piston-tight seal i esta lished and effectively maintained, so

- that the highest degree of eihciency is obprefer to tained in operation. The gas thus compressed and vaporized under the influence of the rotatin impeller is delivered to the outlet 8 toget or with such excess oil as may escape from the oil seals, which oil is carried to the motor for lubricating purposes as will be'fully understood by those skilled in the art. In

, order. to relieve the device from excess temperature due to friction and compression, I

provide the casing 3 withradiating 3.

lo I have shown and described a preferred embodiment of the invention, I do not wish to be understood as limiting myself to.

V the exact construction herein set forth, as I considermyself clearly entitled to all such changes and modifications as fall within the limit and scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States, is

l. A device of the character described ineluding a rotatable impeller, a casing for said did - shaped impeller, the said casing being centrally provided with a Venturi opening, and tangentially provided with an outlet, the said casing also including an annular tubular-like chamher at the extremity thereof and a Venturi Iportion communicating with said tubularsaid oil chamber, the blades of said impeller vided with a Venturi opening,

closely conforming to the formation of the Said casing and provided with oil orts'to recerve oilfrom said hollow shaft, t e edges of said blades being provided with an oilseal groove in communication with the said oil ports.

2. A device of the character described including a rotatable impeller, a casing for said lmpeller, the'said casing being centrallyprov and tangentlally provided with an outlet, the said casmg also including an annular tubular-like chamber at the extremity thereof and a Venturi shaped portion communicating with said tubular-like chamber, a housing including an oil chamber, a hollow shaft to receive oil from said oil chamber, the blades of said impeller ke chamber, a housing including a 1 .oil chamber, a hollow shaft to receive oil from ima es v with a Venturi opening and tangentially provided with an outlet, said casing also including an annular tubular-like chamber at the extremity thereof and a Venturi shaped portion communicating with said tubular-like chamber, a housing including an oil chamber, the blades of the impeller closely conforming to the formation of the said casing and provided with means for receiving oil from the oil chamber to establish an oil seal at the edges of said blades.

4. A device of the-character described ineluding a rotatable impeller, a casing for said impeller, the casing being centrally provided with a Venturi opening, and tangentially provided with an outlet, the said casing also including an annular tubular-like chamber at the extremity thereof and a Venturi shaped portion communicating with said tubularlike chamber,- the blades of the impeller closely conforming to the formation of the said casing, and provided with means to receive oil to establish an oil seal atthe edges of said blades.

5 A device of the character described including a rotatable impeller, a casing for said impeller, said casing being centrally provided with an inlet opening and tangentially provided with an outlet the said casing also including an annular chamber at the extremity thereof and a Venturi shaped portion communicating with said annular chamber, the blades of said impeller closely conforming to the formation of the casing and provided with means for establishing an oil seal at the edges of the said blades.

In testimony whereof I afiix my signature.

' WALTER K. BURGESS, let. M. A. C.

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