US3032889A - Guide roller mounting and fluid injection system for fluidized beds for textile treatment - Google Patents

Description

May 8, 1962 v. B. CHIPALKATTI ETAL 3,032,889 GUIDE ROLLER MOUNTING AND FLUID INJECTION SYSTEM FOR FLUIDIZED BEDS FOR TEXTILE TREATMENT Filed July 17, 1958 In vemors Vasan'l' 8. tkipa/kafl/B 5/; r/ K. Man i vannan MWWX A ttorney;

atent flice 3,032,889 Patented May 8, 1962 3,032,889 GUIDE ROLLER MOUNTING AND FLUID INJEC- TION SYSTEM FOR FLUIDIZED BEDS FOR TEX- TILE TREATMENT Vasant B. Chipalkatti and Krishnan Manivannan, Delhi, India, assignors to Shri Ram Institute For Industrial Research, Delhi, India, a society of India Filed July 17, 1958, Ser. No. 749,270 3 Claims. (Cl. 34-57) This invention relates to an improved method of and means for guiding textile or like materials through columns or beds of fluidized solid particles.

The use of fluidized solid beds for obtaining various effects on textile materials has recently attained considerable importance in the textile industry. It is necessary in an apparatus designed for this purpose to propose such a construction of the guide rollers within the fluidized bed that the passage of the textile material through and out of the bed is facilitiated.

It has been found by experience that the particles forming the fluidized bed often get entrapped into the end bearings of the guide rollers and prevent or even completely stop their rotation, thus causing either excessive tension on the textile under treatment or tearing or breakage of the same. This involves considerable inconvenience in working as well as loss of time and production.

According to this invention the improved method of guiding textile or like material through the fluidized bed of solid discrete particles consists in preventing the fine solid particles from entering the gap formed between the shaft and the bearing surface of the guide rollers working within the fluidized bed by means of fine jets of the fluidizing medium directed into the said gap.

According to another feature of this invention, the fluidizing medium is adapted to impinge in the form of fine jets at a pressure higher than that of the fluid in the fluidizing chamber such as about 10% higher than that of the pressure in the fluidized chamber.

The invention will now be more fully described with reference to the accompanying drawings in which:

FIG. 1 shows in part section the guide roller unit to be used in the fluidized bed.

FIG. 2 shows another embodiment of the invention.

Referring to FIG. 1, the guide roller 1 has a shaft 2 fitting into a bearing assembly 3. The packing is marked 4 While 5 is a gap between the shaft 2 and the bearing 10. 6 are the ports provided in the column 7 which column constitutes the fluidizing bed. The fluidizing material is introduced in the chamber marked 11. Through the ports 6 the fluidizing medium enters an annular space 8 in the bearing 10. The fluidizing medium enter through narrow passages 9 cut at an angle an opening into the gap 5. The fluid enters the gap 5 under pressure.

Referring to an alternative construction in which like parts are indicated by like reference numerals, it will be noticed that the conventional solid shaft 2 is replaced by a hollow shaft 2A and then through openings 12 in the wall of the said shaft, the fluidizing medium enters the gap 5. These openings 12 are disposed at an angle to the bearing axis so that fluidizing medium is directed towards the fluidized bed.

The fluidizing medium is therefore introduced in the construction in FIG. 1 through ports 6, annular space 8 and passages 9 communicating with the gap 5 and in the case of FIG. 2 the fluid enters through the hollow shaft 2A and the openings 12 communicating with the gap 5. In

2 each case, the fluidizing medium supplied to the gap or clearance space 5-flows-freelythrough that space and into the column whereby the particles in the column are fluidized and yet are prevented from entering between the roller end shafts and their bearings.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what We claim is:

1. An apparatus for the treatment of textile materials in the presence of a fluidized bed of solid discrete particles, which comprises a tubular casing containing a column of fluidized solid particles, a guide roller located in said column for guiding the textile material under treatment, said roller having two end shafts, a bearing around each end shaft, a packing for each bearing between that hearing and its shaft, each of said bearings having an inclined passage and an external annular groove formed therein, each of said passages being at an angle to the longitudinal aXis of the related shaft and communicating at its inner ends with a clearance between that shaft and its hearing at a location inboard of the related packing, and being directed toward said column, each of said bearings being supported in a sleeve fixed to said casing and extending from the column, a port in each said sleeve communicating with the annular groove in the bearing within the sleeve, which annular groove communicates in turn with the outer end of said inclined passage in the bearing, and means to introduce a fluidizing medium under pressure through said ports into the annular grooves, and thence through the inclined passages into the clearances between the shafts and the bearings.

2. An apparatus for the treatment of textile material in the presence of a fluidized bed of solid discrete particles which comprises a tubular casing containing a column of fluidized solid particles, a guide roller located in the same column for guiding the textile material under treatment, said guide roller having two hollow end shafts, a bearing around each end shaft and having a clearance space therewith, an inclined passage formed in the wall of each said hollow shaft, said passages connecting the inside of each shaft with the clearance space between that shaft and its bearing, and means to introduce a fluidizing medium under pressure into the hollow shafts and through said inclined passages in the walls of the hollow shafts to said spaces, the bearings being supported in sleeves fixed to said casing and extending from the column.

3. An apparatus for the treatment of textile materials in the presence of a bed of solid discrete particles fluidized by a medium flowing therein under a predetremined pressure, said apparatus comprising a tubular casing containing a column of said fluidized solid particles, a guide roller located in said column for guiding the textile material under treatment, said guide roller having two end shafts, bearing members carried by opposite wall portions of said casing, each bearing member receiving one of said end shafts, an unobstructed clearance space located between each end shaft and its bearing member and opening at one end into said column near one end of said guide roller, means forming a fluid-tight seal between each end shaft and its bearing member and defining a closed end of said clearance space at a location outboard of said column, and means for conducting a flow of said fluidizing medium from a location outside said easing into each of said clearance spaces and freely through the same into said bed under a pressure in excess of said predetermined pressure to fluidize said particles and yet prevent said particles from entering between said end shafts and said bearing members.

References Cited in the file of this patent UNITED STATES PATENTS Freund Nov. 1, 1949 Helmus Dec. 12, 1950 Williams et a1. Jan. 9, 1951 Woods Oct. 7, 1952 Cuny Aug. 25, 1953 Emerson Dec. 29, 1953 Emerson Dec. 29, 1953 Heizer Feb. 23, 1954 Audas et a1 Mar. 19, 1957 Ofien Feb. 4, 1958

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