Filter element

A filter unit and filter medium technology, applied in the direction of filtration separation, membrane filter, cartridge filter, etc., can solve the problems of flammability hazards, damage to oil filter medium materials, etc., and achieve the effect of avoiding voltage peaks

Inactive Publication Date: 2007-02-14
HYDAC FILTERTECHNIK GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Owing to the resulting potential difference within the filter unit, electrical discharges can suddenly occur between electrostatically charged filter unit components, in particular in the form of filter media, and electrically conductive components, in particular generally metallic filter housings in which the filter unit is accommodated. , which, as a consequence, leads to spark discharges, which are considered dangerous in terms of the flammability of the media to be filtered, such as hydraulic oil, heavy oil fuels such as diesel oil or similar, and which can also lead to damage to the oil as well as sensitive filter media material

Method used

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Embodiment Construction

[0017] The filter unit according to the invention has a filter medium 10 which extends between two end caps 12 , 14 which are respectively connected to an assignable end region 16 , 18 of the filter medium 10 which also has an inner circumference. The sides are supported on a support tube 20 . exist figure 1 Seen in the direction of view of , the lower end cap 14 has a contacting device, indicated as a whole by 22 , for conducting away electrostatic charges that arise especially during operation of the filter unit.

[0018] The contacting device 22 consists of individual electrically conductive contact elements, in particular in the form of individual contact pins 24 , which penetrate between the end cap 14 of the filter medium 10 and the received end region 18 to form a The adhesive layer 26 of the insulating layer is thus in conductive contact with the filter medium 10 . The contact pins 24 thus pass through the adhesive layer 26 and they also stand vertically on the corre...

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Abstract

The invention relates to a filter element comprising a filter medium (10) extending between two end caps (12, 14) that are respectively connected to an associable end region (16, 18) of the filter medium (10), supported at least on one side on a supporting tube (20). The fact that at least one of the end caps (14) and / or at least one end region (16, 18) of the filter medium (10) comprises a contacting device (22) and / or the respective end cap (14) itself or parts thereof are embodied in such a way as to derive the electrostatic charges especially occurring during the operation of the filter element, ensures that the charge generated on the filter medium (Meshpack) by tribo-electrical effects can escape towards a mass point or a mass site via the contacting device (22) or the respective end cap (14).

Description

technical field [0001] The invention relates to a filter unit with a filter medium which extends between two end caps which are each connected to an assignable end region of the filter medium which is supported at least on one side on a support tube . Background technique [0002] The filter unit of the above-mentioned type is common in the market, and is widely used, for example, in hydraulic equipment, it is used to flow hydraulic oil system branches. The known filter units are not entirely satisfactory with regard to their operating reliability and the stability of the β value which determines the filter efficiency. Especially for high flow capacities there is the risk of deformation or damage at the connection point where the ends of the filter web join together to form an annular body forming the filter cylinder due to the differential pressure of the fluid acting at the connection point . Such damage and / or deformation of the crease in the region of the joining loca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/50B01D35/14B01D29/21B01D29/15F02M37/22B01D27/06B01D35/147F02B23/06
CPCB01D2201/50F02B23/0696Y02T10/125B01D2201/4084B01D29/15B01D2201/291B01D35/147B01D29/925Y02T10/12
Inventor E·科赫M·施文德S·朗格
Owner HYDAC FILTERTECHNIK GMBH
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