Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Mitsubishi Jukogyo Kabushiki Kaisha

Takahide Ito

Hajime Sato

Makoto Takeuchi

Minoru Matsuo

Yoshiyuki Kimata

Hiroshi Yamazaki

Takuma Yamashita

Keita Kitaguchi

Kazuhide Watanabe

Hirofumi Hirata

Katsuhiro Fujita

Tetsuzou Ukai

Takayuki Kuwahara

Takashi Goto

Hirohumi Hirata

Tomohisa Moro

Hisao Mizuno

Tetsuzo Ukai

Takamitsu Himeno

Masumi Sekita

Norio Hioki

Toshiyuki Shikanai

Yukio Nagato

Koji Terasaki

Akihiro Noguchi

Kazuya Tani

Kimiharu Takada

Takehiko Itou

Yuichi Muroi

Masashi Hamano

Hideshi Hamamura

Toshiyuki Goto

Atsushi Enya

Keisuke Mitoma

Syusaku Goto

In a scroll compressor () provided with a fixed scroll () and an orbiting scroll (), an inclined portion is provided in which the inter-facing surface distance (L) between an end plate () and an end plate () that face each other decreases continuously from the outer peripheral side towards the inner peripheral side. The inclined portion is configured from wall inclined portions () in which the height of a wall () decreases continuously from the outer peripheral side towards the inner peripheral side, and end plate inclined portions () in which a tooth bottom surface is inclined in accordance with the incline of the wall inclined portions (). The inclined portion is provided across a range of no less than 180&#xb0; around the center of the spiral.

Scroll fluid machine and scroll member used therein

Provided is a co-rotating scroll compressor comprising a synchronous drive mechanism that can achieve a long life. The compressor comprises a driving side scroll member () driven to rotate about a driving side rotation axis CL, a driven side scroll member () driven to rotate about a driven side rotation axis CL, a hollowed drive shaft () that is connected to the driving side scroll member (), and driven by a motor () to rotate, and a driven shaft () that is disposed inside the drive shaft (), and has one end connected to the drive shaft () via a first flexible coupling () and the other end connected to the driven side scroll member () via a second flexible coupling ().

Co-rotating scroll compressor and assembly method therefor

A scroll compressor includes a drive bush disposed in one end portion in an axial direction of a main shaft, and configured to be eccentrically rotated in accordance with rotation of the main shaft, a pair of angular bearings arranged back-to-back, and respectively clearance-fitted to an outside of the drive bush, a compression unit that has a boss portion which protrudes from an end plate of a movable scroll and in which the angular bearings are interference-fitted to an inner peripheral surface of the boss portion, and a preload application unit configured to apply a preload to the angular bearings in a direction in which the angular bearings are configured to move toward each other.

Scroll compressor and method for producing same

Scroll member of a scroll fluid machine

A pin-ring mechanism that transmits driving force to cause a driving-side scroll member and a driven-side scroll member to perform rotational movement in a same direction at a same angular velocity is provided. A driving-side end plate includes a ring member installation hole into which a ring member is inserted and installed. The ring member installation hole includes a non-wall-side hole part and a wall-side hole part. The non-wall-side hole part is formed from a non-wall-side surface and has a diameter corresponding to an outer diameter of the ring member. The wall-side hole part is formed from a wall-side surface and has a diameter smaller than the outer diameter of the ring member.

Co-rotating scroll compressor

A co-rotating scroll compressor includes a driving-side scroll member (), a driven-side scroll member (), a pin ring mechanism (), a driving-side bearing () that rotatably supports the driving-side scroll member (), and a driven-side bearing () that rotatably supports the driven-side scroll member (). A center of gravity of at least one of the driving shaft (), the driving-side scroll member (), and the driven-side scroll member () is shifted from rotation centers (CL, CL) by a predetermined distance. The predetermined distance is set so that a total bearing load obtained by centrifugal force and fluid compression that is 5% of a dynamic load rating of the driving-side bearing () and the driven-side bearing () or more is generated.

Co-rotating scroll compressor and method for designing the same

Provided is a scroll fluid machine which can appropriately set a tip clearance between a tooth base and a tooth crest having an inclined portion and can achieve desired performance. An inclined portion in which a distance between opposing surfaces of an end plate of a fixed scroll and an end plate of an orbiting scroll facing each other gradually decreases from an outer peripheral side toward an inner peripheral side is provided. A tip clearance between a tooth crest of a wall of the orbiting scroll and a tooth base of the end plate of the fixed scroll facing the tooth crest at normal temperature is greater on the inner peripheral side than on the outer peripheral side.

Scroll fluid machine including first and second scroll members

The present invention provides a co-rotating scroll compressor that can inhibit leakage of lubricant supplied to a synchronous drive mechanism. A co-rotating scroll compressor includes a drive-side plateplaced between a driving scroll memberand a motorat a predetermined distance from the driving scroll memberin a direction of a drive-side rotation axis CL. The drive-side plateincludes a shaft portionfixed to a driving shaftof the motorand a fixing portionfixed to an outer periphery of the driving scroll member, and a synchronous drive mechanism made up of a needle bearingand a pinis placed between the drive-side plateand driving scroll member

Provided is a scroll fluid machine which is capable of inhibiting contact between tooth tip corners and tooth bottom corners. The present invention is provided with: a wall inclined portion () of which a facing surface has a distance to an end plate which continuously decreases from the outer circumferential side to the inner circumferential side; and an end plate inclined portion (). Chamfered portions () are provided to tooth tip corners () of a tooth tip of a wall () which face tooth bottom corners () of bases of mating walls (). The chamfered portions () have a shape which avoids contact with step parts () which are formed at the tooth bottom, and which are adjacent to the tooth bottom corners ().

Scroll fluid machine, and method for processing scroll member

To provide a scroll fluid machine that can improve reliability in abrasion resistance of a power transmission mechanism including a pin member and a ring member. The machine includes a driving scroll member (), a driven scroll member (), and a power transmission mechanism () that transmits power to synchronously rotate both scroll members () and allow the scroll members to revolve and orbit relative to each other. The power transmission mechanism () includes a pin () attached to the driven scroll member (), a ring body () provided in the driving scroll member () and having an inner circumference in contact with an outer circumference of the pin (), and a circular groove () housing the ring body () and having an inner circumference in contact with an outer circumference of the ring body (). Of surface contact pressure in a contact portion between the outer circumference of the pin () and the inner circumference of the ring body (), and surface contact pressure in a contact portion between the outer circumference of the ring body () and the inner circumference of the circular groove (), the contact portion having higher surface contact pressure has a larger frictional torque.

Scroll fluid machine with improved power transmission mechanism

Scroll member of scroll fluid machine

Provided is a horizontal step scroll compressor with which liquid compression can be effectively prevented even when starting up from a liquid migration state in which liquid refrigerant has migrated into the compressor while operation of the compressor is stopped. In this horizontal step scroll compressor, bypass ports, which divert pressure into a discharge chamber when the pressure in a pair of compression chambers reaches or exceeds a set pressure at an intermediate compression position between a suction cutoff position and the position communicating with a discharge port, are provided along the spiral direction of spiral wraps. Among these bypass ports, the opening area of the bypass ports that open into the first compression chamber, which includes the step parts in the gravity direction when a step part and a step part, and a step part and a step part, begin to engage each other, is greater than the opening area of the bypass port, which opens to the second compression chamber forming a pair with the first compression chamber.

Horizontal step scroll compressor with bypass ports

An object is to provide a scroll compressor capable of preventing degradation in performance and the occurrence of abnormal noise due to a torsional moment applied to an orbiting scroll, by utilizing the structural advantages of so-called stepped scroll compressors. In a so-called stepped scroll compressor (), in a pair of compression chambers () arranged in a point-symmetrical configuration among a plurality of compression chambers (), the volume Vof the compression chamber () formed on the ventral-surface side of the fixed spiral wrap (B) of the fixed scroll () when intake is cut off and the volume Vof the compression chamber () formed on the ventral-surface side of the orbiting spiral wrap (B) of the orbiting scroll () are different from each other.

Scroll compressor with stepped spiral wraps

To provide a scroll compressor capable of reducing a noise occurring in a pin-and-ring type self rotation preventing mechanism and improving compression performance. In a scroll compressor comprising: a fixed scroll member and a revolving scroll member; a driven crank mechanism for driving the revolving scroll member to revolutionary turn; and a pin-and-ring type self rotation preventing mechanism provided in plural places for preventing self rotation of a revolving scroll member, at least one of the self rotation preventing pin, the self rotation preventing ring and the self rotation preventing ring hole, which form the pin-and-ring type self rotation preventing mechanism, is provided with an orbit correction part for reducing a maximum displacement R in a direction of self rotation of the revolving scroll member to smooth a change of an orbit of the revolving scroll member in changing a pin and a ring in a section of prevention of self rotation by means of a corresponding pin and ring part.

Scroll compressor with improved rotation prevention mechanism

In a scroll compressor, a center of a turning scroll body is shifted with respect to a drive central axis so that a distance between a gravity center and the drive central axis in a turning scroll becomes smaller than a predetermined allowable value set based on theoretical displacement and mass of the turning scroll. A moment force about the drive central axis acting on the turning scroll is reduced during revolving, and an alternating force acting on an autorotation preventing pin in the turning scroll is reduced to an allowable level.

Scroll compressor having a shifted gravity center

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Tokyo, Japan

Takahide Ito