Variable speed cooling compressor including lubricating oil pumping system

Patent metadata

Field	Value
Publication number	US-10844759-B2
Application number	US-201715407907-A
Country	US
Kind code	B2
Filing date	Jan 17, 2017
Priority date	Jan 19, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

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.

First claim

The invention claimed is:

1. A variable speed cooling compressor including a lubricating oil helical pump, comprising:
at least one casing, at least one electric engine composed of a stator and a rotor, at least one compression mechanism, at least one compressor block, at least one rotating shaft, and at least one restraint pin;
wherein cooperation and interaction between the at least one compressor block, the at least one rotating shaft, and the at least one restraint pin defines the lubricating oil helical pump;
said rotating shaft comprising at least one lower portion, at least one intermediate portion, at least one peripheral flange, and at least one cam upper portion;
said rotating shaft further comprising at least one inner axial channel, at least one axial channel extension, and at least one inner cam channel segment;
said oil pump comprising at least one tubular extension and a helical channel segment;
said variable speed cooling compressor including the lubricating oil helical pump being comprised by:
the at least one tubular extension of the lubricating oil helical pump, the at least one inner axial channel of the rotating shaft, the at least one axial channel extension of the rotating shaft, which defines the lubricating oil helical pump, and the at least one inner cam channel segment of the rotating shaft are all fluidly interconnected to each other in order to conform a single integrated channel; and characterized by
said at least one intermediate portion of the rotating shaft comprises at least one first radially passing hole and at least one second radially passing hole connecting the at least one inner axial channel with the inner cam channel segment, both the first and the second radially passing holes being able to establish fluid communication between the integrated channel and the cooperation and interaction between the compressor block and the rotating shaft.

2. The compressor according to claim 1 , characterized in that a gas is transported from the intermediate portion of the rotating shaft to the at least one cam upper portion of the rotating shaft only by means of the integrated channel.

3. The compressor according to claim 1 , characterized by the rotating shaft further comprising, on the outer face of the intermediate portion, an outer intermediate helical channel segment able to establish fluid communication between the at least one first radially passing hole and the at least one second radially passing hole.

4. The compressor according to claim 3 , characterized by the at least one first radially passing hole being able to establish fluid communication between the lower end of the outer intermediate helical channel segment and the at least one inner axial channel of the rotating shaft.

5. The compressor according to claim 3 , characterized by the at least one second radially passing hole being able to establish fluid communication between the upper end of the outer intermediate helical channel segment and the at least one inner cam channel segment internal to the rotating shaft.

6. The compressor according to claim 1 , characterized by the at least one axial channel and the at least one axial channel extension having the same diametrical dimension.

Assignees

• Whirlpool Sa
• Embraco—Industria De Compressores E Solucoes Em Refrigeracao Ltda

Inventors

• Sacomori Diego
• Manke Adilson Luiz

Classifications

• F04B39/0246 Primary

  in the rotating shaft · CPC title

• F01M2001/0238

  Rotary pumps · CPC title

• F16N7/366

  with feed by pumping action of a vertical shaft of the machine · CPC title

• F04B39/0261

  with an auxiliary oil pump · CPC title

• F01M1/02 Primary

  using lubricating pumps (pumps in general F04; lubricating pumps per se F16N) · CPC title