US2449408A - Compressor - Google Patents

Description

Sept. 14, 1948. J. NAAB COMPRESSOR Filed Sept. 15, 1945 LILrG FLLLz-[L 1 0 INVENTOR- 18 Julius Naab.

HIS, ATTORNEY- Patented Sept. 14, 1948 COMPRESSOR Julius Naab, Easton, Pa., assignor to Ingersoll- Rand Company, New York, N. Y., a corporation of New Jersey Application September 13, 1945, Serial No. 616,084

This invention relates to air and gas compressors and more particularly to liquid cooled compressors of the reciprocating type.

In compressors of this type it is common for the heat of compression to rise several hundred degrees F. This has the bad effect of either igniting the lubricating oil or causing it to disintegrate to leave carbon deposits. Such deposits are found often on the discharge valve parts and interfere with the seating of the valves and cause many other troubles. The intense heat is also troublesome at, the inlet valves since it causes preheating of the air thereby affecting the volumetric efilciency of the compressor.

It is an object of this invention to reduce such troubles by a novel form of water cooled valve assembly for the compressor.

Other objects of the invention will be in part obvious and in part pointed out hereinafter.

The drawing illustrates a preferred embodiment of the invention and includes,

Fig. 1, a longitudinal section through a portion of a cylinder, its head and the associated valve assembly,

Fig. 2, an enlarged longitudinal section of a portion of the structure of Fig. 1 showing particularly the arrangement of cooling passages through the valve assembly parts,

Fig. 3 is a cross-section view taken at the line 3- -3 of Fig. 2- looking in the direction of the arrows,

Fig. 4 is a section through the valve assembly at line 4--4 of Fig. 3 looking in the direction of the arrows, and

Fig. 5 is a perspective view of the spacer element of the valve assembly.

Referring to the drawings it will be seen that the compressor comprises a cylinder in within which is adapted to reciprocate a piston 12, a head M for the cylinder l secured thereto by suitable studs l and a valve assembly l6. Only a portion of the piston l2 and cylinder iii are shown and are sufilient to describe the invention.

The wall of the cylinder I0 is providedwith passages It for the flow of cooling liquid as is customary. Likewise the head I4 is provided with cooling liquid passages 20 there being a suitable discharge conduit 22 provided in the wall of the cylinder head l4 through which the water is discharged. The interior of the head I4 is divided into two chambers by acentral wall 24 to form an inlet chamber 26 and a discharge chamber 28. r

The valve assembly It may, as shown, be interposed betweenthe head [4 and the cylinder [0 2 Claims. (Cl. 230-212) 2 and held in place by the center bolt 30 extending thru the center wall 24 and the center of the valve assembly l6.

Valve assembly It, as shown more particularly in Figs. 2, 3, 4 and 5, consists of a pair of seating members 32 and 34 spaced from each otherby a flat plate member 36 which also acts as-a guide for channel shaped valves 38 and their biasing springs 40. Preferably the valves 38 are constructed according to the invention of Charles S. Baker Patent No. 2,040,542 of July'20, 1933.

The spacer 36 is provided with notches 42 to receive the ends of the channel valves 33 and springs 40 and to keep them properly located on ports 43 of the seating members 32 and 34. Suitable passages are also provided in seating members 32 and 34 as shown at 44 to receive the air passing by the valves 38.

As shown in Fig. 2 the portion of the valve assembly l6 registering with the chamber 26 is arranged for the passage'of air or gas into the cylinder ID from the inlet chamber 26 and that portion adjacent the chamber 28 is adapted to act as a discharge valve to permit the flow of compressed gas from the cylinder l0 into the discharge chamber 28.

In order to cool the valve assembly both of the seating members 32'and 34 are water cooled. To this end they are constructed hollow to form a continuous inner chamber 50 extending from an opening 52 registering with a passage 54 leading from the cooling water passage l8 in the cylinder wall to a passage 56 oppositely disposed in the seating members and registering with aperture 58 leading to the cooling water chamber 20 in the head l4.

To conveniently form the seating members 32 and 34 hollow they are preferably each formed in two parts as shown at 60 and 62. Being made in this manner the interior of each member 60 and 62 respectively is preferably cast hollow as shown in Fig. 3 and their opposed surfaces are cooling water, a valve assembly including a pair 8 ylinderof seating members having a plurality of air ports and valve plates for said air ports, said seating members being hollow to define cooling water passages extending between the walls of the said air ports, and inlet and outlet openings in the seating members to afford communication between the interiors of the seating members and the passages in said head and said cylinder.

2. A compressor comprising a cylinder having wall passages for the flow 01' cooling water, a detachable head having passages for the flow of cooling water, and a valve assembly for the cylinder including a seating member having a plurality of air ports and valve means for controlling said ports, said seating member being hollow to define ooling water passages extend- 4 ing between the walls of adjacent air ports and having inlet and outlet openings to aflord communication between the interior 0! the seating member and the passages in said head and said JULIUS NAAB.

REFERENCES crrEn The following references are'of record in the tile of this patent:

UNITED STATES PATENTS Number Name Date 246,657 Buell Sept. 6, 1881 706,979 Martin Aug. 12, 1902 736,254 Herron Aug. 11, 1903 864,990 Richards et al. Sept. 3, 1907 1,159,123' Steedman Nov. 3, '1915 1,649,076 Prellivitz Nov. 15, 1924 1,967,885 Replogle July 24, 1934 1,996,762 Halleck .L Apr. 9, 1935

Images