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我们为了满足给水排水工程的发展需要,从1976年8月,开始螺旋泵的试制工作,只用1000元左右,2个月时间,就取得较好成果(图1)。这次测试的螺旋泵的组成如图2。通过初步测定,提出几点粗浅看法。 (1)确定设计参数时,建议外径与内径之比D/d采用2:1,直径与螺距之比D/λ,采用1:1,为了提高效率,螺旋头数以2～3头为宜。直径大,转速可小一些,在40转/分左右。直径小,转速则应大一些,在50
In order to meet the development needs of the water supply and drainage project, we started the trial production of the screw pump in August 1976, and only used 1,000 yuan or so for 2 months to achieve better results (Figure 1). The composition of the screw pump tested this time is shown in Fig. 2. Through preliminary determination, several rough ideas were put forward. (1) When determining the design parameters, it is recommended that the ratio of the outer diameter to the inner diameter D/d be 2:1 and the ratio of the diameter to the pitch D/λ be 1:1. To increase the efficiency, the number of spiral heads is 2 to 3 should. Large diameter, speed can be smaller, at around 40 rpm. Small diameter, speed should be larger, at 50