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Reciprocating piston lubrication pump

a lubrication pump and reciprocating 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 service life of the pump, accelerating wear, and causing local fracture of the pump components

Pending Publication Date: 2022-06-23
SKF LUBRICATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a new type of lubrication pump that uses a special coated piston to reduce wear and fracture damage during operation. The piston has a very smooth surface, which is made up of a hard coating that is several times harder than the material of the pump's component. This results in a high-quality design that is both cost-effective and long-lasting. Even when lubricants have a high percentage of metallic particles or low oil content, this pump can still achieve high performance with minimal wear and damage. Overall, this patent presents a new solution for improving the performance and durability of lubrication pumps.

Problems solved by technology

The high content of the metallic particles and / or the low concentration of oils in the lubricants may accelerate the wear and induce local fracture of the pump components, i.e., pump piston and pump cylinder, and reduce the pump service life significantly.
In some extreme cases, the pump may fail in few weeks and even in few days.

Method used

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  • Reciprocating piston lubrication pump
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Examples

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Embodiment Construction

[0027]FIG. 1 shows an axial local section of a reciprocating piston lubrication pump 10 according to the invention, which comprises component 12 with an opening 14 (FIG. 2). The opening 14 has a cylinder-shaped part 16. A piston 18 of the reciprocating piston lubrication pump 10 is located partly within a region 24 of the component, which forms the cylinder-shaped part 16. The piston 18 has a radially outer surface 20 which is built by a coating 22. A clearance between the radially outer surface of the piston and the component is between two and 10 micrometers when the radially outer surface is located in the cylinder-shaped part. A surface hardness of the coating at the radially outer surface is four to eight times higher than that of the region of the component which forms the cylinder-shaped part.

[0028]The component comprises a hole 30 (FIG. 1) and a further hole (not shown) through which lubricant (not shown) is sucked into a part of the opening, which is located between the pis...

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PUM

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Abstract

A reciprocating piston lubrication pump with a component is proposed having an opening, which has at least one cylinder-shaped part, and with at least one piston, which comprises a radially outer surface built at least partly by a coating. A clearance between the radially outer surface of the piston and the component is between 1 μm and 20 μm when the radially outer surface is positioned in the cylinder-shaped part. The surface hardness of the coating at the radially outer surface is 2 to 10 times higher than that of a region of the component, which forms the cylinder-shaped part.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to German Patent Application no. 102020134539.9, filed Dec. 22, 2020, the contents of which is fully incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to a reciprocating piston lubrication pump with a component having an opening. This invention further relates to a reciprocating piston lubrication pump with a component having an opening that provides at least one cylinder-shaped part, and with at least one piston, which comprises a radially outer surface built at least partly by a coating.BACKGROUND OF THE INVENTION[0003]Lubrication pumps play a major role in lubrication systems. There are many different types of lubrication pumps such as reciprocating piston pump, rotary pump (screw, gear pumps, rotary vane and lobe pumps), eddy (slurry) pumps, etc. aiming for different application purposes. The reciprocating piston pump is one of the most often used pumps due to its comp...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B19/22F04B53/18F04B15/02
CPCF04B19/22F04B15/02F04B53/18F04B53/14F04B53/00F04B53/008
Inventor ZHOU, XIAOBOMUELLER, TOBIASABDUL, AZEEZRÜHL, HEINZMATTA, CHRISTINEFAID, MOHAMMEDNEDELCU, ILEANAEICHHORN, THOMASWENSKAT, GUNTHER
Owner SKF LUBRICATION SYST