Rotary cylinder configuration and method to control slot dimensions during direct weld attachment to the shell
AssigneeCarrier Corporation
InventorJoseph P. Vaccaro
Life of this patent
Estimating the term…
Abstract
A rotary cylinder is tested by loading in two fixed and one movable locations until a location of the movable point is found at which no, or a predetermined amount of, distortion takes place in the vane slot. The cylinder is then welded into a shell at the three points without producing distortion of the vane slot or with a predetermined distortion.
Claims12
A method for locating three weld points for securing a rotary cylinder having a vane slot in a shell with predetermined slot distortion comprising the steps of:
- (a) selecting two loading points on the cylinder on opposite sides of the projected axis of the vane slot:
- (b) while keeping the two loading points fixed, selectively locating a third loading point on the cylinder in the general vicinity of the vane slot;
- (c) loading the cylinder at the three points;
- (d) determining the strain on the vane slot due to loading the cylinder;
- (e) continually repositioning the third loading point and repeating steps (c) and (d) until a third loading point is located at which strain representative of the predetermined slot distortion occurs at the vane slot.
In a hermetic compressor having a shell, a rotary cylinder having a central cylindrical compressor chamber, first and second asymmetrically located circumferential areas spaced by first and second recessed areas with said first circumferential area being larger than said second circumferential area, a radially extending vane slot formed in said cylinder and terminating in said compressor chamber such that a projection of the axis of said vane slot essentially bisects said first circumferential area, said rotary cylinder being welded in place in said shell at only three points two of which are on said first circumferential area and the third of which is on said second circumferential area.
Dependencies are inferred from the claim text.