Feed pump and sealing arrangement for same

A technology for conveying pumps and seals, which is applied to pumps, pump components, variable capacity pump components, etc., can solve the problems of long-term shutdown and the known sealing structure has a low service life, and achieves easy polymerization and improved service life. Effect

Inactive Publication Date: 2009-05-13
LINCOLN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transfer pumps with conventional seals are only suitable to a limited extent especially for pumping UV paints and similar media which are extremely prone to polymerization
[0003] In addition, the service life of the known seals for such conditions of use is generally not very high, so that the seals have to be replaced frequently
Therefore, the pump needs to be shut down for a long time for maintenance
Furthermore, with the known feed pumps and seals there is a local risk that the medium to be pumped hardens on the piston and / or the seal of the feed pump even with minimal friction

Method used

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  • Feed pump and sealing arrangement for same

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Embodiment Construction

[0016] The single FIGURE shows the structure of the delivery pump 1 in a schematic sectional view. The delivery pump comprises a pump housing 2 designed essentially as a cylindrical tube, the lower side of which in the figure is closed by an inlet valve 3 designed as a non-return valve. The inlet valve 3 is constructed and arranged to allow inflow into the pump housing 2 and prevent outflow from the pump housing 2 .

[0017] On the upper side in the figure, the pump housing 2 is hermetically closed by a connection 4 from which an outlet valve 5 likewise designed as a non-return valve branches off, which is constructed and arranged so as to allow Fluid flows out of the pump casing 2 while inflow into the pump casing 2 is blocked.

[0018] In addition, a threaded section is provided on the connection 4 , into which a screw-in sleeve 6 is screwed in in a leak-tight manner. Arranged in the screw-in sleeve 6 are two spaced apart seals 7 a , 7 b designed as groove seals. A piston...

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Abstract

The present invention relates to a feed pump, in particular for pumping UV-paints and other high-viscosity media, with a pump housing (2) to which an inlet valve (3) and an outlet valve (5) are fitted, and a piston (8), which for pumping a medium is mounted in the pump housing (2) in a manner as to permit positional shifting. To improve the seal and the piston lifetime, the piston 8)is guided in at least one section (4) of the pump housing (2) by way of at least two seals (7a, 7b)positioned one behind the other in the axial direction of the piston (8) so as to seal it from its surroundings and forming between them an intermediate, in particular gapped space (12) that connects to the flow from a coolant and / or lubricant container (11).

Description

technical field [0001] The invention relates to a delivery pump with a pump housing, which is associated with an inlet valve and an outlet valve, and a piston, which is movably mounted in the pump housing for the delivery medium. Furthermore, the invention relates to a seal for such a delivery pump. Background technique [0002] Transfer pumps are also used for pumping UV coatings / UV-Farbe and other high viscosity media. Particularly high demands are placed on the seal between the piston and the pump housing in the case of media which harden / harden due to polymerization, for example at high temperatures or on contact with other media. Friction, for example between pump housing and piston, must therefore be avoided to a large extent in order to avoid, for example, polymerization of UV coatings due to frictional heating. Delivery pumps with conventional seals are only suitable to a limited extent for the pumping of especially UV paints and similar media which are extremely p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B15/02F04B53/16
CPCF04B53/164F04B15/02F04B53/16
Inventor A·施米特
Owner LINCOLN GMBH
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