Compressor and compressor-manufacturing method

Patent metadata

Field	Value
Publication number	US-10364820-B1
Application number	US-201816116572-A
Country	US
Kind code	B1
Filing date	Aug 29, 2018
Priority date	Apr 27, 2018
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

A compressor includes a casing having an upper half casing and a lower half casing and a tubular shape with both ends open, a bundle including annular heads respectively fixed on both sides in an axial direction with respect to a plurality of diaphragms and closing openings of the casing, a communication clearance seal portion sealing a communication clearance extending in the axial direction between the outer peripheral surface of the diaphragm and the inner peripheral surface of the casing such that a suction opening and a discharge opening communicate with each other, and a regulating portion regulating the position of the head in the axial direction with respect to the casing.

First claim

What is claimed is:

1. A compressor comprising:
a casing including an upper half casing having an upper half casing-divided surface as a horizontal surface facing downward in a vertical direction and a lower half casing having a lower half casing-divided surface capable of abutting against the upper half casing-divided surface, the casing having a tubular shape with a first end and a second end that are open;
a bundle including an impeller rotatable about an axis, a plurality of diaphragms in which the impeller is accommodated and a flow path introducing a fluid to a flow path of the impeller is formed, and annular heads respectively fixed on the first end and the second end of the casing in an axial direction in which the axis extends with respect to the plurality of diaphragms and closing the first end and the second end of the casing, the bundle being accommodated in the casing;
a communication clearance seal portion sealing a communication clearance extending in the axial direction between an outer peripheral surface of one of the diaphragms and an inner peripheral surface of the casing such that a suction port through which the fluid flows in and a discharge port through which the fluid is discharged communicate with each other; and
a regulating portion provided in at least one of the casing and one of the annular heads and regulating a position of the one of the annular heads in the axial direction with respect to the casing, wherein
the communication clearance seal portion is an O ring;
a clearance seal attachment groove to which the communication clearance seal portion is attached is formed in the outer peripheral surface of the one of the diaphragms; and
the clearance seal attachment groove is tapered to become deeper toward a circumferential direction from at least one of an upper vertex of the one of the diaphragms in the vertical direction and a lower vertex of the one of the diaphragms in the vertical direction.

2. The compressor according to claim 1 , wherein the clearance seal attachment groove is formed to be deepest at both end positions in a horizontal direction having an angular difference of 90 degrees in the circumferential direction of the one of the diaphragms with respect to the upper vertex of the one of the diaphragms in the vertical direction and the lower vertex of the one of the diaphragms in the vertical direction.

3. The compressor according to claim 1 , wherein the regulating portion includes:
a fitting recessed portion formed in one of an outer peripheral surface of the one of the annular heads and the inner peripheral surface of the casing; and
a fitting projecting portion formed in the other one of the outer peripheral surface of the one of the annular heads and the inner peripheral surface of the casing and fitting into the fitting recessed portion.

4. The compressor according to claim 1 , wherein the regulating portion is disposed on an outside in the axial direction as a side opposite to a side where the one of the diaphragms is disposed with respect to the one of the annular heads in the casing and is in contact with a surface of the one of the annular heads facing the outside in the axial direction.

5. The compressor according to claim 4 , wherein the casing includes:
a casing main body covering an outer peripheral surface of the bundle; and
a protruding portion protruding from the casing main body toward an inside in a radial direction and in contact with an end surface of the one of the annular heads facing the outside in the axial direction, as the regulating portion.

6. The compressor according to claim 4 , wherein the regulating portion includes:
a regulating accommodating recessed portion recessed from the inner peripheral surface of the casing to be positioned on the outside in the axial direction at least in part with respect to the one of the annular heads;
a first regulating member accommodated in the regulating accommodating recessed portion and in contact with the surface of the one of the annular heads facing the outside in the axial direction; and
a second regulating member accommodated in the regulating accommodating recessed portion outside the first regulating member in the axial direction and in contact with a surface of the regulating accommodating recessed portion facing an inside in the axial direction as a side where the one of the diaphragms is disposed and a surface of the first regulating member facing the outside in the axial direction.

7. The compressor according to claim 1 , further comprising:
a fastening portion fixing the one of the diaphragms and a discharge side head as the one of the annular heads disposed at a position adjacent to the discharge port, wherein
the fastening portion includes:
a fixed hole formed in a surface of one of the discharge side head and the one of the diaphragms facing the axial direction and having a female screw in the fixed hole;
a fastening through-hole formed at a position overlapping the fixed hole when seen from the axial direction in the other one of the discharge side head and the one of the diaphragms;
a bolt member having a shaft portion having an outer peripheral surface provided with a male screw and fixed to the fixed hole in a state where the shaft portion is inserted in the fastening through-hole and a head portion formed in an end portion of the shaft portion; and
one selected from a group consisting of: a belleville spring washer, a rubber material, and a spring member disposed between the head portion of the bolt member and a surface where the fastening through-hole is formed.

8. The compressor according to claim 1 , further comprising:
a head seal portion providing sealing between the one of the annular heads and the casing, wherein
the head seal portion includes:
an annular ring insertion portion movable in the axial direction from an outside of the one of the annular heads or the casing and inserted between the outer peripheral surface of the one of the annular heads and the inner peripheral surface of the casing;
an inside ring seal portion providing sealing between an inner peripheral surface of the ring insertion portion and the outer peripheral surface of the one of the annular heads; and
an outside ring seal portion providing sealing between an outer peripheral surface of the ring insertion portion and the inner peripheral surface of the casing.

9. The compressor according to claim 8 , wherein the ring insertion portion is detachable with respect to the one of the annular heads or the casing from the outside in the axial direction as a side opposite to a side where the one of the diaphragms is disposed.

10. The compressor according to claim 8 , wherein an insertion clearance diameter-enlarged portion enlarging a clearance between the outer peripheral surface of the ring insertion portion and the inner peripheral surface of the casing is formed at a position shifted in the axial direction with respect to the outside ring seal portion.

11. The compressor according to claim 1 , wherein a wire insertion portion allowing a wire to be inserted is formed at a lower end of the one of the annular heads in the vertical direction.

12. A compressor comprising:
a casing including an upper half casing having an upper half casing-divided surface as a horizontal surface facing downward in a vertical direction and a lower half casing having a lower half casing-divided surface capable of abutting against the upper half casing-divided surface, the casing having a tubular shape with a first end and a second end that are open;
a bundle including an impeller rotatable about an axis, a plurality of diaphragms in which the impeller is accommodated an

Assignees

• Mitsubishi Heavy Ind Compressor Corp

Inventors

• Oda Takashi
• Shinohara Hitoshi

Classifications

• F04D29/083 Primary

  especially adapted for elastic fluid pumps · CPC title

• F04D29/624

  especially adapted for elastic fluid pumps · CPC title

• F04D17/125

  the casing being vertically split · CPC title

• F04D17/122

  the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors · CPC title

• F04D29/622

  Adjusting the clearances between rotary and stationary parts · CPC title