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Large-sized low lift head pump device energy performance calculation method

A low-lift pump, large-scale technology, used in pump control, non-variable-capacity pumps, machines/engines, etc., can solve the problems of high cost, long cycle, affecting the design quality of pump devices, and the construction progress of pump station projects.

Active Publication Date: 2015-06-10
YANGZHOU UNIV
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Problems solved by technology

The efficiency index of the existing low-lift pump device generally adopts the method of model test. According to the diameter of the standard model impeller, the pump device is scaled down to make a model device of a certain size, and the model test of the pump device is carried out on the special test bench. The energy performance of the pump device model, because this method has the disadvantages of long period and high cost, it often affects the design quality of the pump device and the construction progress of the pump station project

Method used

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  • Large-sized low lift head pump device energy performance calculation method
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Embodiment

[0065] The design flow rate of the large-scale low-lift pumping station in this embodiment is 100m 3 / s, the design head and average head are 3.86m and 3.66m respectively, adopt low-lift vertical pump device, choose 4 sets of 3.15ZLQ-4 vertical axial flow pumps (one of which is spare), and use TJ04-ZL-06 The water pump model adopts an elbow-shaped water inlet channel and a low hump-shaped water outlet channel. The schematic diagram of the pump device is shown in figure 2 The steps of applying the present invention to calculate the energy performance of the station pump device are as follows:

[0066] (1) The hydraulic performance test data of the water pump model TJ04-ZL-06 blade placement angles of -4°, -2°, 0°, +2° and +4° issued by the testing agency are listed in the table 1; Q in Table 1 bm 、H bm and η bm represent the flow rate, head and efficiency of the pump model respectively;

[0067] (2) The hydraulic performance test data for the blade placement angle of -4° ...

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Abstract

The invention discloses a large-sized low lift head pump device energy performance calculation method and belongs to the technical field of water conservancy project pump stations. The large-sized low lift head pump device energy performance calculation method is mainly characterized by comprising the following steps of dividing the pump device efficiency into the pump body efficiency and the runner efficiency; calculating water head loss of a water feeding pipeline and a water discharging pipeline and the pump body efficiency under different working conditions of a water pump model according to common water pump model hydraulic performance materials issued by a national assigned detection mechanism; calculating the runner efficiency according to the water head loss of the water feeding pipeline and the water discharging water head under different working conditions of the pump device; recording the rotation angular velocity of pump body outlet water flows at an inlet to accurately calculate the water head loss of water discharging runners of the water discharging pipeline and the pump device in the water pump model. The large-sized low lift head pump device energy performance calculation method is simple and convenient, can accurately calculate the pump device energy performance at a pump station design stage at the right moment, is used for verifying whether a type selection design of the pump device satisfies a requirement or not and provides a scientific and reasonable technological index for pump station equipment bid inviting.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering pumping stations, and in particular relates to a method for calculating the energy performance of a large-scale low-lift pump device. , and provide scientific and reasonable technical indicators for pumping station equipment bidding. Background technique [0002] Large-scale low-head pumping stations are widely used in important fields such as water resource allocation, agricultural irrigation and drainage, water environment improvement, and urban flood control and drainage. The main body of the large-scale low-lift pumping station is the pump device, which is composed of a water pump impeller, guide vane body, water inlet flow channel, and water outlet flow channel. The efficiency of the pump unit is the main assessment content of the energy performance of the large-scale low-lift pump unit. The large-scale low-head pump station needs to propose the efficiency index of the ...

Claims

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Application Information

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IPC IPC(8): F04D15/00
CPCF04D15/00
Inventor 陆林广陆伟刚徐磊蒋涛徐波练远洋施克鑫王海李亚楠
Owner YANGZHOU UNIV
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