由上海机床厂生产的GPA型低噪声内啮合齿轮泵是引进美国VICKERS公司的新型液压油泵。它可广泛应用于各类机床、打包、注塑、起重、压铸、医疗器械及人造板加工等机械液压系统的动力装置。长期来,由于国产液压泵在质量上存在着先天缺点及噪音问题,已直接或间接地影响了工业产品的质量。近年来,国外发展的噪声低、脉动小的内啮合齿轮泵逐步引起人们的重视。其中美国 The GPA type low noise internal gear pump produced by Shanghai Machine Tool Plant is a new type of hydraulic oil pump introduced from VICKERS Company in the United States. It can be widely used in all types of machine tools, packaging, injection molding, lifting, die-casting, medical equipment and plywood processing and other mechanical hydraulic system power plant. In the long term, due to the inherent defects and noise problems of domestic hydraulic pumps, the quality of industrial products has been directly or indirectly affected. In recent years, foreign development of low noise, pulsatile internal gear pump gradually attracted people’s attention. One of the United States