Refrigerant compressor, piston of a refrigerant compressor and piston arrangement

a refrigerant compressor and piston technology, applied in the direction of pump components, positive displacement liquid engines, liquid fuel engine components, etc., can solve the problems of reducing the risk of piston deformation during bolt insertion, and the risk of bolt loss substantially smaller, so as to reduce the bolt mass, prevent leakage, and improve sealing

Inactive Publication Date: 2010-02-11
DANFOSS COMPRESSORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0015]Preferably, the bolt comprises a hollow space. The hollow space can be used for two purposes. Firstly, it reduces the mass of the bolt. The smaller the moved mass is, to which also the bolt contributes, the smaller are the forces acting upon the moving parts during operation, and the smaller is the risk of a wear. Secondly, the hollow space of the bolt can also be used to supply lubricating oil.
[0016]This is parti...

Problems solved by technology

With a slide fit, the risk that the piston is deformed during insertion of the bolt is smaller than with...

Method used

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  • Refrigerant compressor, piston of a refrigerant compressor and piston arrangement
  • Refrigerant compressor, piston of a refrigerant compressor and piston arrangement

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Embodiment Construction

[0027]A refrigerant compressor 1 shown in a schematic view in FIG. 1 comprises a hermetically closed housing 2 in the form of a case. In the housing 2 is arranged a compressor block 3 with a cylinder 4, in which a piston 5 is reciprocating. Together with the cylinder 4 and a cylinder head 5, the piston 5 borders a compression chamber 7.

[0028]The movement of the piston 5 in the cylinder 4 is generated by means of a crankshaft 8 that is driven by an electric motor 9. The electric motor 9 has a stator 10 and a rotor 11, to which the crankshaft 8 is connected.

[0029]At one end, the crankshaft 8 is provided with a crank pin 12, which performs an orbiting movement around an axis 13 during operation. A connecting rod 14 is connected to the crank pin 12, the connecting rod 14 being connected to the piston, as will be explained in detail in connection with FIG. 2.

[0030]In the bottom area the housing 2 has an oil sump 15, in which an oil pump 16 is submerged that pumps oil upward through the h...

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Abstract

The invention concerns a refrigerant compressor with a cylinder, in which is arranged a piston (5) that is connected to a crankshaft via a connecting rod (14), the connecting rod (14) having a piston eye (18), through which a bolt (17) inserted in the piston (5) is guided. With such a refrigerant compressor, it is endeavoured to achieve a good efficiency. For this purpose, the bolt (17) is inserted in a blind bore (19).

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]Applicant hereby claims foreign priority benefits under U.S.C. §119 from German Patent Application No. 10 2008 036 999.3 filed on Aug. 7, 2008, the contents of which are incorporated by reference herein.FIELD OF THE INVENTION[0002]The invention concerns a refrigerant compressor with a cylinder, in which is arranged a piston that is connected to a crankshaft via a connecting rod, the connecting rod having a piston eye, through which a bolt inserted in the piston is guided. Further, the invention concerns a piston of such a refrigerant compressor and a piston arrangement with a connecting rod, a bolt and a piston.BACKGROUND OF THE INVENTION[0003]A refrigerant compressor as mentioned in the introduction is, for example, known from DE 195 22 210 C1. Here the bolt is connected to the piston by means of a press fit. In order to reduce a too heavy deformation of the piston, the press fit has a pair of fit surfaces, which are exposed to a reduced ...

Claims

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Application Information

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IPC IPC(8): F04B39/00
CPCF04B53/144F04B39/0022
Inventor ANDERSEN, BRIAN H.SVENDSEN, MORTENBJERRE, PREBENNISSEN, JENS ERIKDAMM-HINRICHSEN, MARTINSCHMIDT, SONKEREINHOLD, SONKEMICHELSEN, SOREN
Owner DANFOSS COMPRESSORS
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