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pumps for conveying fluids

A technology for conveying fluids, pump housings, applied in the field of modular motor and pump assemblies, which can solve problems such as reducing the efficiency of internal combustion engines

Inactive Publication Date: 2020-02-14
BUHLER MOTOR GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of SCR technology is also that: the SCR technology does not reduce the efficiency of the internal combustion engine

Method used

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  • pumps for conveying fluids
  • pumps for conveying fluids
  • pumps for conveying fluids

Examples

Experimental program
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Embodiment Construction

[0037] figure 1 Shows a sectional view through a first embodiment of a pump drive 1 with an electronically commutated DC motor 3 consisting of a wound stator assembly 6 , a permanent magnet rotor 7 , a central machine shaft 18 and gears The pump 4 is constituted, the gear pump has a first gear 19, the first gear is integrated with the hollow shaft 46 protruding into the gear pump 4; and the second gear 20 driven by the first gear 19, the second gear is contained in on the crankshaft 42; and the fluid inlet 12. Here, the gears 19, 20 are made of PEEK. The crankshaft 42 is arranged in the pump housing 15 , wherein the pump housing 15 is designed in three parts; it is composed of a pump head 43 , an intermediate part 44 and a pump cover 45 . Central crankshaft 18 and crankshaft 42 are fixed in pump head 43 and are supported radially in pump cover 45 directly or via hollow shaft 46 . The pump head 43 is provided with an axial projection 48 which provides a sufficiently long fas...

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Abstract

A pump drive for conveying a reducing agent for motor vehicle exhaust gas systems, with an electronically commutated direct current motor, a positive displacement pump, and a freezing compensation structure. Also, a modular motor and pump family for forming different pump drives with several such electric motors and pumps. It is the aim of the invention to ensure, in the simplest and most robust manner possible, the integration of a hydraulic unit (gear pump) into an electrical unit (electric motor), a sealing of a wet region from a dry region, an integration of a freezing compensation into the wet region, and a mechanical attachment on the customer side. A modular construction of the electric motor and of the positive displacement pump, which, without a large modification cost, via simple combination of assemblies or modules, can be used for different requirements, is important for this.

Description

technical field [0001] The invention relates to a pump drive for delivering a reducing agent for a motor vehicle exhaust system, which has an electronically commutated DC motor, a displacement pump and a freeze compensator. Furthermore, the invention relates to a modular motor and pump assembly for forming different pump drives with a plurality of such electric motors and pumps. Background technique [0002] The invention applies to internal combustion engines of motor vehicles, which usually emit a large amount of NOx. This is especially true in the case of diesel engines, since these burn with excess oxygen compared to gasoline engines. NOx is a harmful gas that is harmful to the environment and human health. The SCR technology (selective catalytic reaction, selective catalytic reaction) has long been known as an auxiliary measure, in which an aqueous urea solution is injected directly into the combustion exhaust gas of the exhaust gas branch in order thereby to bring ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/08F04C2/10
CPCF04C2/086F04C2/101F04C11/008F04C15/008F04C15/0023F04C2230/60F04C2240/30F04C2240/56H02K3/44
Inventor 卡尔-海因茨·博姆
Owner BUHLER MOTOR GMBH