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A new experimental device and test method for measuring self-priming performance of self-priming pump

An experimental device and self-priming pump technology, applied in the field of fluid machinery, can solve the problems of time-consuming, labor-consuming, time-consuming, etc., and achieve the effect of reducing the experimental work intensity and equipment requirements

Inactive Publication Date: 2018-06-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the water level in the pool is changed by filling or releasing water from the pool, irrigation and drainage equipment is required and it takes a long time. Therefore, in the actual test, the installation position of the self-priming pump is generally adjusted, which usually requires the production of a special lifting platform. to fulfill
In the test, it is necessary to adjust the hydraulic cylinder or other forms of adjustment devices to realize the lifting of the lifting platform, and the test process is time-consuming and labor-intensive.

Method used

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  • A new experimental device and test method for measuring self-priming performance of self-priming pump
  • A new experimental device and test method for measuring self-priming performance of self-priming pump
  • A new experimental device and test method for measuring self-priming performance of self-priming pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Self-priming performance test of open impeller self-priming pump

[0033] Such as image 3 a shows the self-priming performance test of the open impeller self-priming pump using the test device. The design flow rate of the self-priming pump is Q=3m 3 / h, head H=20m, speed n=2860r / min, n s =31.9, the diameter of the water inlet pipe is 20mm. The designed self-priming height zH is 9m.

[0034] In this example, the height difference h between the water level C-C of the experimental pool and the installation surface B-B 1 is 0.3m, the height h between the pump inlet A-A and the installation surface B-B 2 (including the height of the installation platform) is 0.30m. Firstly, a Z-bend with a nominal diameter of 20mm and a length of the middle section of the Z-bend L=9m is installed vertically (β=90°) to conduct a self-priming performance test. The results of the self-priming performance test are as follows: image 3 as shown in b. As can be seen from the f...

Embodiment 2

[0035] Embodiment 2: Self-priming performance test of jet type self-priming pump

[0036] Such as Figure 4 a shows the self-priming performance test of the jet self-priming pump using the test device. The design flow rate of the self-priming pump is Q=2m 3 / h, head H=20m, speed n=2860r / min (impeller flow rate is 3m 3 / h,n s =31.9), the diameter of the water inlet pipe is 20mm. The designed self-priming height zH is 9m.

[0037] In this example, the height difference h between the water level C-C of the experimental pool and the installation surface B-B 1 is 0.3m, the height h between the pump inlet A-A and the installation surface B-B 2(including the height of the installation platform) is 0.30m. Firstly, a Z-bend with a nominal diameter of 20mm and a length of the middle section of the Z-bend L=9m is installed vertically (β=90°) to conduct a self-priming performance test. The results of the self-priming performance test are as follows: Figure 4 as shown in b. As c...

Embodiment 3

[0038] Example 3: Self-priming performance test of external mixing self-priming pump

[0039] Such as Figure 5 a shows the self-priming performance test of the external mixing self-priming pump using the test device. The design flow rate of the self-priming pump is Q=50m 3 / h, head H=32m, speed n=2900r / min, n s =92.7, the diameter of the water inlet pipe is 50mm. The design self-priming height zH is 6m.

[0040] In this example, the height difference h between the water level C-C of the experimental pool and the installation surface B-B 1 is 0.3m, the height h between the pump inlet A-A and the installation surface B-B 2 (including the height of the installation platform) is 0.25m. First, a Z-bend with a nominal diameter of 50mm and a length of the middle section of the Z-bend L=6m is installed vertically (β=90°) to conduct a self-priming performance test. The results of the self-priming performance test are as follows: Figure 5 as shown in b. As can be seen from th...

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PUM

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Abstract

The invention discloses a novel testing device for measuring self-sucking performance of a self-sucking pump. The device comprises a Z bend with adjustable flanges arranged at the two ends and a J water pipe which is provided with a plurality of water level sensors. The flange at one side of the Z bend is connected with an inlet of the self-sucking pump through a bolt and nut, and the flange at the other end is connected with the J water pipe with the water level sensors. The other end of the J water pipe with the water level sensors is immersed into a pond. According to the essential characteristics of the self-sucking performance of the self-sucking pump, the Z bend with the adjustable flanges arranged at the two ends and capable of being installed in a rotating mode can be used for adjusting the self-sucking height of the self-sucking pump, and thus time-consuming and labor-consuming pond filling and draining in a traditional testing method are needless, or the equipment and testing process for lifting the self-sucking pump with a lifting platform are of no need, either. The self-sucking height and self-sucking time performance curve of the self-sucking pump can be obtained at a time through testing; the transparent J water pipe can be used for visually observing the self-sucking capacity of the self-sucking pump; and a critical self-sucking transient process test can be carried out on the self-sucking pump by simply adjusting the installation tilting angle of the Z bend.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and in particular relates to an experimental device for measuring self-priming performance such as self-priming time and self-priming height of a self-priming pump and a corresponding test method. Background technique [0002] The self-priming pump is a kind of water pump that only needs one-time irrigation and water diversion. When it is turned on again, it will take a certain amount of time to discharge the gas inside the pump to realize its self-priming performance. The main self-priming performance evaluation parameters of self-priming pumps include two performance indicators: self-priming height and self-priming time. [0003] At present, the self-priming time and self-priming height of the self-priming pump are tested through the following procedures and methods: First, record the height zH of the pump at a certain installation position from the suction level 1 , record the time t when the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D15/00
CPCF04D15/0088
Inventor 潘中永倪永燕魏洋洋李红
Owner JIANGSU UNIV