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Tribological pair and process for surface treatment in tribological pairs

A friction pair and surface layer technology, applied in the field of friction pairs, can solve problems such as large deformation and contact of friction pairs, increased mechanical force, and increased load

Inactive Publication Date: 2013-09-11
WHIRPOOL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0052] These factors directly increase the mechanical forces, and thus the loads applied to the components of the mechanism, leading to greater deformation and contact of the friction pairs, so that even components coated by nitriding can experience wear under certain operating conditions

Method used

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  • Tribological pair and process for surface treatment in tribological pairs
  • Tribological pair and process for surface treatment in tribological pairs
  • Tribological pair and process for surface treatment in tribological pairs

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Embodiment Construction

[0066] While the review of the prior art and the current limitations of the prior art have been strongly related to the design requirements and mechanical forces in replicating cold compressors, particularly those of reduced size, it should be noted that , the invention can be applied to different friction pairs whose operating conditions are similar to those discussed for the compressor in question.

[0067] As already mentioned above, the friction pair object of the present invention comprises two metal members 10, 20, one of which has a movable contact surface 10a which provides a relative The friction of the corresponding contact surface 20a of the second metal member 20 of the metal members.

[0068] As discussed in more detail below, the two metal members 10, 20 of the friction pair considered here are generally obtained in any of the following materials: carburized or alloy steel with high surface hardness, low Carbon steel, pure iron, alloy iron, cast iron and other i...

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Abstract

The present invention is applied to a tribological pair comprising two metal pieces (10, 20), a first of them having a movable contact surface (10a) which provides friction in relation to a respective contact surface (20a) of a second of said metal pieces (20). According to the present invention, the first metal piece (10) has its contact surface (10a) defined by a coating formed: by a first surface layer (11) in a material harder than that of the first metal piece (10); and by a second surface layer (12), disposed onto the first surface layer (11) and in a material defining a coating which reduces the chemical affinity in relation to the contact surface (20a) of the second metal piece (20) of the tribological pair, in order to provide, to said tribological pair, a lower friction coefficient in relation to the tribological pair deprived of said coating.

Description

technical field [0001] The invention relates to friction pairs of the type defined by components having movement relative to each other, each component having a respective contact surface, and to a method for treating the contact surfaces of elements or components of a friction pair. Background technique [0002] Alternatives to reciprocating compressors for domestic or commercial refrigeration systems are constantly being researched with the aim of increasing the energy efficiency of said machines. One way of achieving the stated goal is by reducing the mechanical losses of the movable parts (friction pairs) that result from the relative motion between the friction pairs, such as: crankshafts and bearings; smaller bores for piston pins and connecting rods ; the larger eye of the eccentric pin and the connecting rod; and the spherical joint between the connecting rod and the part coupled thereto. [0003] Mechanical losses between frictional pairs of relative motion, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/12F16C33/14F16C33/20F16C33/16F16C33/10
CPCF16C33/1095F16C33/124F16C33/127F16C33/14F16C33/16F16C33/201F16C33/205F16C33/208F16C2204/60F16C2223/14F16C2223/08F16C2223/30F16C2202/50C23C28/00F16C33/121F16C33/12F16C33/10
Inventor A·L·曼克A·T·克里斯托福利尼M·G·施瓦茨
Owner WHIRPOOL SA