研究了影响外啮合齿轮泵容积效率的泵变形对周向间隙高度的影响

IF 1.3 4区工程技术 Q3 TRANSPORTATION SCIENCE & TECHNOLOGY

Transport Pub Date : 2022-12-22 DOI:10.3846/transport.2022.18331

R. Cieślicki, M. Karpenko

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引用次数: 2

摘要

齿轮泵在运输机械中不仅广泛应用于液压传动系统，而且广泛应用于润滑和燃油系统。容积泵将机械能转化为储存在液体中的压力能，并将其输送到液压缸或马达。这个过程的效率取决于系统组件的效率，包括泵的效率，这取决于通过高低压侧间隙的内泄漏量。间隙越大，容积效率越低。本文研究了泵的变形对周向间隙高度的影响。本文用有限元法建立了外啮合齿轮泵在工作状态下的三维模型。该模型反映了在排放压力高达32 MPa时的泵送操作，并通过泵套应变测量进行了验证。仿真结果表明，泵壳在压力作用下发生变形，导致环向间隙高度显著增大。当排气压力从8 MPa增加到32 MPa时，周向间隙局部高度增加了2倍以上。所得结果表明，为了正确地模拟齿轮泵产生的流量，必须考虑齿轮泵变形引起的间隙大小的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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AN INVESTIGATION OF THE IMPACT OF PUMP DEFORMATIONS ON CIRCUMFERENTIAL GAP HEIGHT AS A FACTOR INFLUENCING VOLUMETRIC EFFICIENCY OF EXTERNAL GEAR PUMPS

Gear pumps are widely used in transport machines not only in hydraulic drive systems, but also in lubrication and fuel systems. A positive displacement pump converts mechanical energy into pressure energy stored in the liquid, which it transports to the hydraulic cylinder or motor. The efficiency of this process depends on the efficiency of the system components, including the efficiency of the pump, which depends on the amount of internal leakage through the gaps between the high and low pressure sides. The larger the gaps, the lower the volumetric efficiency. This article presents an investigations of impact of pump deformations on circumferential gap height. The article presents a three-dimensional model of an external gear pump using Finite Element Method (FEM) during operating conditions. The model reflects pumping operation at discharge pressures up to 32 MPa and it was validated against strain measurements of pump casing. The simulation results indicate that the pump casing becomes deformed due to pressure, causing a significant increase in the height of the circumferential gap. The increase of the discharge pressure from 8 to 32 MPa causes more than twofold local increase in the height of the circumferential gap. The obtained results indicate that for the correct modelling of the flow generated by gear pumps, it is necessary to consider the change in the size of the gaps resulting from the deformation of the pump.

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来源期刊

Transport Engineering-Mechanical Engineering

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

4 months

期刊介绍： At present, transport is one of the key branches playing a crucial role in the development of economy. Reliable and properly organized transport services are required for a professional performance of industry, construction and agriculture. The public mood and efficiency of work also largely depend on the valuable functions of a carefully chosen transport system. A steady increase in transportation is accompanied by growing demands for a higher quality of transport services and optimum efficiency of transport performance. Currently, joint efforts taken by the transport experts and governing institutions of the country are required to develop and enhance the performance of the national transport system conducting theoretical and empirical research. TRANSPORT is an international peer-reviewed journal covering main aspects of transport and providing a source of information for the engineer and the applied scientist. The journal TRANSPORT publishes articles in the fields of: transport policy; fundamentals of the transport system; technology for carrying passengers and freight using road, railway, inland waterways, sea and air transport; technology for multimodal transportation and logistics; loading technology; roads, railways; airports, ports, transport terminals; traffic safety and environment protection; design, manufacture and exploitation of motor vehicles; pipeline transport; transport energetics; fuels, lubricants and maintenance materials; teamwork of customs and transport; transport information technologies; transport economics and management; transport standards; transport educology and history, etc.