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Pump

一种泵级、叶轮的技术，应用在泵、泵装置、横流泵等方向，能够解决成本高、投入大等问题，达到简单结构、良好可调节性的效果

Active Publication Date: 2016-06-01
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of positive displacement pumps are their complex and thus more expensive construction

Method used

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  • Pump

Examples

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Effect test

Embodiment Construction

[0010] The invention is described in detail in one embodiment. The single figure shows a pump according to the invention as an SCR pump in a motor vehicle. A pump 1 is arranged in an additive container 2 , from which the pump sucks in additive in the main conveying direction through an inlet 3 and conveys the additive via a first pump stage 4 and a second pump stage 5 to an outlet 7 by means of an electric motor 6 . The outlet 7 is connected to a delivery line 8 through which additives are mixed into the fuel 9 . However, it is also conceivable to arrange the pump 1 outside the additive container 2 . The additive is then sucked in via a suction line connected to the inlet 3 and leading into the additive container 2 . The pump 1 has a housing in which the electric motor 6 and its shaft 10 are arranged. The shaft 10 is designed to drive two impellers 11 , 12 arranged in a pump housing 13 in a rotationally fixed manner. The first impeller 11 and the associated pump chamber 14...

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Abstract

The invention relates to a pump (1) with a housing, in which an electric motor (3) of a pump step (4) which can be driven by a shaft (10) of the electric motor (3) is arranged. A second pump step (5) which can be driven by the shaft (10) is arranged in series with the first pump step (4), both pump steps (4, 5) being designed as peripheral or lateral channel steps and the running wheels (11, 12) of both pump steps (4, 5) are arranged counter to the direction of conveyance of the respective other pump step (5, 4).

Description

technical field [0001] The invention relates to a pump having a housing in which an electric motor is arranged, the pump stages being driveable by the shaft of the electric motor. Background technique [0002] Such pumps are known and are used in particular in motor vehicles to deliver additives mixed into the fuel. The task of the additives mixed in is to reduce nitrogen oxides in the exhaust gas of the motor vehicle. These pumps are also referred to as SCR pumps based on the resulting chemical reaction. The additive is piped from the container to the fuel by the SCR pump. To prevent lines containing additives from freezing, drain the lines when not driving. Evacuation takes place by reversing the polarity of the direction of rotation of the SCR pump so that the delivery direction of the SCR pump is directed from the line to the additive container. Positive displacement pumps are used as pump types, since they can deliver forwards or backwards depending on the direction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D5/00F02M25/00
CPCF02M25/00F04D5/006F04D3/00F04D13/06
Inventor M·沃尔克
Owner VTESCO TECH GMBH
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