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Pump for conveying a liquid, in particular an exhaust-gas cleaning additive

A technology for conveying liquid and conveying channels, applied in the field of exhaust gas purification devices, can solve the problems of difficulty in conveying and re-accepting, and achieve the effect of high sealing

Active Publication Date: 2016-11-02
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is often problematic to completely empty the pump, since this makes re-admission of the delivery significantly more difficult after a stoppage of operation.

Method used

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  • Pump for conveying a liquid, in particular an exhaust-gas cleaning additive
  • Pump for conveying a liquid, in particular an exhaust-gas cleaning additive
  • Pump for conveying a liquid, in particular an exhaust-gas cleaning additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] exist figure 1 A pump 1 can be seen, which has a pump housing 2 with an inlet 3 and an outlet 4 . An eccentric (not shown here) can be positioned in the pump housing 2 , which can be rotated to convey the liquid from the inlet 3 to the outlet 4 . For driving the eccentric along the geometric axis 53 of the pump 1 above the pump housing 2 is arranged an (electric) drive 49 which is connected to the eccentric via a drive shaft 48 . The geometrical axis 53 corresponds to the drive axis of the pump. In order to further explain the pump 1 , a cylindrical coordinate system should be specified here in addition to the geometric axis 53 , which has the geometric axis 53 ; the radial direction 28 perpendicular to the geometric axis 53 and the The geometrical axis 53 and the circumferential direction 47 of the radial direction 28 are arranged tangentially to the geometrical axis 53 . Furthermore, an intermediate plane 18 can be named, which centrally divides the pump housing 2 ...

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PUM

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Abstract

The invention relates to a pump (1) for conveying a liquid, comprising at least one pump housing (2), which has at least one inlet (3) and at least one outlet (4) and an inner circumferential surface (13) and a geometric axis (53), wherein an eccentric (5), which can be rotated about the geometric axis (53) in relation to the pump housing (2), is arranged within the pump housing (2), wherein a deformable element (7) is arranged between the inner circumferential surface (13) of the pump housing (2) and the eccentric (5) and wherein a conveying channel (8) from the at least one inlet (3) to the at least one outlet (4) is formed by means of the deformable element (7) and the inner circumferential surface (13) of the pump housing (2) and wherein furthermore the deformable element (7) is pressed against the pump housing (2) by the eccentric (5) in some sections in such a way that at least one movable seal (9) of the conveying channel (8) and at least one closed pump volume (10) in the conveying channel (8) are formed, which at least one seal and at least one closed pump volume can be moved in order to convey the liquid along the conveying channel (8) from the inlet (3) to the outlet (4) by means of a rotational motion of the eccentric (5), wherein at least one receptacle (14), in which at least one edge region (20) of the deformable element (7) is accommodated, is formed by the circumferential surface (13) of the pump housing (2) and at least one counter-holder (15).

Description

technical field [0001] The invention relates to a pump for conveying liquids, which is particularly suitable for conveying exhaust gas purification additives, such as aqueous urea solutions, into exhaust gas purification devices for cleaning the exhaust gases of internal combustion engines. Background technique [0002] Exhaust gas purification devices are widely used, for example in the motor vehicle sector, in which liquid additives are used for exhaust gas purification, wherein in particular nitrogen oxides are also to be separated from the exhaust gas. So-called SCR methods (SCR = Selective Catalytic Reduction, Selective Catalytic Reduction) are carried out in such exhaust gas purification systems. In the SCR method, nitrogen oxides in the exhaust gas are reduced using a reducing agent, usually ammonia. Ammonia is usually not stored directly in the motor vehicle, but in the form of a liquid (exhaust gas) additive that is placed outside the exhaust gas (in an external re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F04B13/02F04C5/00
CPCF01N3/206F01N3/2066F01N2610/02F01N2610/1433F04B13/02F04C5/00F04C2210/1083F04C2220/24Y02A50/20Y02T10/12B01D53/9431F01N2610/1406F01N2610/1453F04C15/0003F04C15/06F04C2240/20F04C2240/30
Inventor J.霍奇森G.玛干Y.科普
Owner VTESCO TECH GMBH
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