Whirlpool S.a.

Embraco-industria De Compressores E Solucoes Em Refrigeracao, Ltda.

Empresa Brasileira De Compressores S.a.

Nidec Global Appliance Brasil Ltda.

Adilson Luiz Manke

Dietmar Erich Bernhard Lilie

Dietmar E Lilie

Rinaldo Puff

Rodrigo Kremer

Diego Sacomori

Moises Alves De Oliveira

Gelson Longo

Fabiano Domingos Silva

Ernani Pautasso Nunes, Jr

João Victor Lindroth

Osimar Aparecido De Oliveira

Gerson De Araújo

Laerte Capestrini

Aleandro Amauri ESPÍNDOLA

Alberto Bruno Feldmann

The present invention belongs to the technological field of cooling compressors and, particularly, constructive details of lubricating oil pumps of cooling compressors. Problem to be solved: The current state of the art does not describe any solution of oil pump and construction of rotating shaft capable of achieving the correct lubricating of the moving components that include the compression functional unit of cooling compressor, which operating speed can vary between 700 and 4500 rpm. Solution of the problem: It is disclosed is a variable speed cooling compressor which tubular extension of the oil pump, the inner axial channel of the rotating shaft, the axial channel extension of the rotating shaft and the inner cam channel segment of the rotating axis are all fluidly connected to each other in order to conform a single integrated channel.

Variable speed cooling compressor including lubricating oil pumping system

The connecting rod includes a first portion of the connecting rod to be mounted on the eccentric pin of a crankshaft of the compressor and a second portion of the connecting rod to be articulated in a reciprocating piston within a cylinder. One of the first and second portions of the connecting rod includes a tubular stem portion that receives, telescopically and loosely, and retains, by radial inward deformation, a portion of the engagement stem of the other portion of the connecting rod, said stem portions being held together, in an axial and rotational alignment condition, before being attached by a fixation mean in a relative axial positioning, which results in a portion of the compression chamber and a respective portion of dead volume in the condition of upper dead point of the piston.

Two parts telescopic connecting rod for alternative compressors and method of assembling two-parts telescopic connecting rod in alternative compressors

The arrangement of the present invention is applied to a compressor which comprises a bearing hub housing a crankshaft and presenting at least a first and a second bearing portion, spaced apart by a circumferential recess. The crankshaft presents at least a first and a second support portion, spaced apart by a circumferential recess, which is offset from the circumferential recess of the bearing hub. At least one of the bearing portions and support portions has an axial extension superior to that required for radially bearing the crankshaft, the first and second bearing portions defining, with the first and second support portions, respectively, a first and a second radial bearing regions having the axial extensions required for a radial bearing for the crankshaft, presenting lower loss by viscous friction.

Bearing arrangement for a reciprocating compressor

The present invention refers to a crankshaft () for an alternative compressor comprising a main shaft () connected to an eccentric pin () by means of a peripheral flange () containing a lubricating hole () extending through said eccentric pin () and through at least part of the body of main shaft (), one of the edges of said hole () being on the cylindrical surface () of said eccentric pin (). With this type of hole, the present invention allows for the use of shafts having extremely low diameters (and, as result, with low viscous loss), even with high eccentricities, whereby an excellent capacity of oil pumping and mechanical strength is maintained.

Crankshaft for an alternative cooling compressor

The compressor comprises: a crankcase () carrying a cylinder () and a bearing hub () having a first and a second end portions () and defining a radial bearing (), in which is housed a crankshaft (); and a connecting rod () coupled to a piston () housed in the cylinder () and having a larger eye () mounted in an eccentric end portion () of the crankshaft (). Each of said end portions () is defined by a bushing extension () affixed in the interior of the bearing hub () and having an end portion () projecting outwards from the bearing hub (), in order to be elastically and radially deformed when pressed by a confronting portion of the crankshaft (), which presents coaxiality deviation in relation to the axis (X) of the radial bearing ().

Bearing arrangements in a refrigeration reciprocating compressor

The arrangement is applied to a compressor which comprises: a crankcase, carrying a cylinder provided with a lateral slot and in which is housed a piston provided with two radial holes and with an eccentric axial hole; a connecting rod connected to a crankshaft driven by an electric motor and having a smaller eye mounted in the piston; and a wrist pin having a first end turned to the bearing hub of the crankcase, a second end turned to the lateral slot of the cylinder and a diametrical hole, adjacent to the second end in which is provided an engaging means, for the axial and rotational coupling of a tool for mounting and indexing the wrist pin, in the interior of the piston, in a position in which the diametrical hole is axially aligned with the eccentric axial hole, so as to allow an elastic pin to be introduced in said diametrical hole and in said eccentric axial hole.

Mounting arrangement for a piston-connecting rod assembly in a refrigeration compressor

A reciprocating hermetic compressor includes a cylinder block internal to a shell and carrying a cylinder and a radial bearing hub; a crankshaft vertically mounted in the radial bearing hub and carrying, inferiorly, a rotor of an electric motor and, superiorly, a support annular face and an eccentric portion. The radial bearing hub incorporates an upper tubular extension, bearing a corresponding extension of the crankshaft and around which is mounted an axial rolling bearing for supporting the weight of the crankshaft-rotor assembly, as well as the axial stresses produced during compression of the refrigerant gas.

Axial bearing arrangement for a hermetic compressor

A reciprocating hermetic compressor, of the type including a rotor with permanent magnets and having its tubular vertical shaft ( ) provided radially externally to the internal surface thereof with at least one axial channel ( ) of oil conduction, having a lower end ( ) immersed in the lubricant oil being pumped from a lubricant oil sump ( ) defined at the bottom of the hermetic shell of the compressor, and an upper end ( ) opened to a median radial duct ( ), which conducts lubricant oil to the parts of the compressor spaced away from the lubricant oil sump ( ).

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Adilson Luiz Manke