Scroll type fluid machinery and assembling method of the same

A scroll type fluid machinery comprising:

• a housing having a cup-shaped casing with an opening at one end thereof, the housing further having a front casing, the front casing closing the opening;
• a stationary scroll and a revolving scroll each having spiral wraps set up at inner surfaces of end plates thereof, the scrolls being arranged in the housing in engagement with each other at a predetermined angle, said stationary scroll being fixed to said casing;
• a revolution drive mechanism for moving said revolving scroll in a solar motion and a mechanism for checking rotation of the revolving scroll, the revolution drive mechanism and the mechanism for checking being located in the housing;
• at least one leg on the end plate of the stationary scroll and at least one leg on a bottom of said cup-shaped casing, each of said legs on the end plate having a matching leg on the cup-shaped casing, each leg having an end surface with a positioning hole defined therein, and end surfaces of matching legs contacting one another;
• a pin insertable in both of the positioning holes of each of the matching legs for positioning the stationary scroll and said cup-shaped casing with the predetermined angle therebetween to thereby determine positioning between said stationary scroll and said cup-shaped casing;
• both of said front casing and said cup-shaped casing having at least one positioning bolt hole defined therein, the bolt holes being aligned when the front casing is to be mounted on the cup-shaped casing whereby a position at a regular angle between the front casing and the cup-shaped casing can be determined;
• both said cup-shaped casing and the stationary scroll having at least one bolt hole defined therein, the bolt holes in the cup-shaped casing and the stationary scroll being aligned when the pin is inserted into the positioning holes of each of the matching legs whereby the aligned bolt holes form bolt hole pairs;
• and
• bolts positionable in each of the bolt hole pairs to hold the stationary scroll fixed to the cup-shaped housing.

A scroll type fluid machinery comprising:

• a housing having a cup-shaped casing with an opening at one end thereof, the housing further having a front casing, the front casing closing the opening in the cup-shaped casing, the housing having a generally central, longitudinal axis;
• a stationary scroll and a revolving scroll each having spiral wraps set up at inner surfaces of end plates thereof, the scrolls being arranged in the housing in engagement with each other at a predetermined angle, both the stationary scroll and the cup-shaped casing having bolt holes defined therein;
• a bolt positionable in the bolt holes of the stationary scroll and the cup-shaped casing for holding the stationary scroll fixed to said cup-shaped casing;
• a revolution drive mechanism for moving said revolving scroll in a solar motion and a mechanism for checking rotation of the revolving scroll, the revolution drive mechanism and the mechanism for checking being located in the housing;
• first means for aligning the stationary scroll within the cup-shaped casing such that the stationary scroll can be fixed to the cup-shaped casing;
• and
• second means for aligning the front casing with the cup-shaped casing such that the front casing can be fixed to the cup-shaped casing, the second means, and at least a part of the first means being different distances from the generally central longitudinal axis of the housing and the first and second means being used sequentially.

A process for assembling a scroll type fluid machinery comprising the steps of:

• providing a housing having a cup-shaped casing with an opening at one end thereof the housing further having a front casing, the front casing closing the opening and the cup-shaped casing having a flange and a bolt hole defined therein;
• providing a stationary scroll and a revolving scroll each having spiral wraps set up at inner surfaces of end plates thereof, the stationary scroll having a bolt hole defined therein;
• positioning the scrolls in the housing in engagement with each other at a predetermined angle;
• providing at least one opening on both of the stationary scroll and the cup-shaped casing, an inner edge of the inner surface of the end plate of the stationary scroll at a circumferential edge thereof having the at least one opening defined therein and the flange of the cup-shaped casing having the at least one opening defined therein, the at least one opening defined in the flange being on a side facing the opening of the cup-shaped casing;
• fixing the predetermined angle relationship between the stationary scroll and the cup-shaped casing by the at least one of the openings in the end plate of the stationary scroll and the flange of the cup-shaped casing;
• inserting pins formed on a positioning jig in the at least one of the openings in the end plate of the stationary scroll and in the at least one of the openings in the flange of the cup-shaped casing during the step of fixing, the pins on the positioning jig aligning the stationary scroll and the cup-shaped casing, the bolt hole in the stationary scroll being aligned with the bolt hole in the cup-shaped casing;
• inserting a bolt into the aligned bolt holes of the stationary scroll and cup-shaped casing to fix the stationary scroll to the cup-shaped casing;
• providing a revolution drive mechanism for moving said revolving scroll in a solar motion and a mechanism for checking rotation of the revolving scroll;
• locating the revolution drive mechanism and the mechanism for checking in the housing;
• providing at least one positioning hole in the front casing and at least one positioning hole in the cup-shaped casing;
• aligning the at least one positioning holes in the front casing and the cup-shaped casing;
• and
• fixing the front casing to the cup-shaped casing using said positioning hole with a relative angle being formed therebetween.

A process for assembling a scroll type fluid machinery comprising the steps of:

• providing a housing having a cup-shaped casing with an opening at one end thereof, the housing further having a front casing, the front casing closing the opening, the cup-shaped casing having a bolt hole defined therein;
• providing a stationary scroll and a revolving scroll each having spiral wraps set up at inner surfaces of end plates thereof, the stationary scroll having a bolt hole defined therein;
• positioning the scrolls in the housing in engagement with each other at a predetermined angle;
• providing at least one leg on the end plate of the stationary scroll and at least one leg on a bottom of said cup-shaped casing, each of the at least one legs on the end plate having a matching leg on the cup-shaped casing, each leg having an end surface with a positioning hole defined therein;
• touching the end surface of each of the at least one legs on the end plate with the end surface of a matching leg on the cup-shaped casing;
• inserting a pin in each of the positioning holes of the matching legs when the end surfaces of the matching legs are touching, the pin fixing the predetermined angle between the stationary scroll and cup-shaped casing to thereby determine positioning between the stationary scroll and the cup-shaped housing, the bolt hole in the stationary scroll being aligned with the bolt hole in he cup-shaped casing;
• inserting a bolt into the aligned bolt holes of the stationary scroll and cup-shaped casing to fix the stationary scroll to the cup-shaped casing;
• providing a revolution drive mechanism for moving said revolving scroll in a solar motion and a mechanism for checking rotation of the revolving scroll;
• locating the revolution drive mechanism and the mechanism for checking in the housing;
• providing at least on positioning bolt hole in the front casing and in the cup-shaped casing;
• aligning the bolt holes when the front casing is to be mounted on the cup-shaped casing;
• and
• fixing the front casing to the cup-shaped casing using the bolt holes to thereby determine a regular angle between the front casing and the cup-shaped casing.