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High-speed centrifugal vortex pump for low-flow high-lift liquid medium

A technology of liquid medium and high-speed centrifugation, which is applied to components, pumps, and drive pumps of pumping devices for elastic fluids, and can solve problems such as noise, chemical reactions, poor quality of the production process, and frequent maintenance

Inactive Publication Date: 2006-01-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the head coefficient of the centrifugal impeller of the high-speed centrifugal pump is between 0.55 and 0.72, and the efficiency is not very ideal when transporting liquid medium with Q=0.2~10m3 / h and head H=120~1800m
[0007] Reciprocating pumps still have certain advantages in conveying medium with small flow and high head, but there are two unavoidable disadvantages: 1) poor reliability, frequent maintenance, because the plunger reciprocates back and forth, it is easy to cause packing and skeleton The seal leaks oil and water, which causes the pump to not operate normally; 2) The vibration is large, the noise is high, and the flow rate is unstable. Because the plunger is moving back and forth, vibration will inevitably occur, accompanied by noise
What's more serious is that due to its uneven outlet flow, it will have a negative impact on the subsequent chemical reactions and the quality of the production process.

Method used

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  • High-speed centrifugal vortex pump for low-flow high-lift liquid medium
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  • High-speed centrifugal vortex pump for low-flow high-lift liquid medium

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Embodiment Construction

[0022] attached figure 1 The high-speed centrifugal vortex pump shown comprises a low-speed shaft 2, a high-speed shaft 9, a gear box 10, a vortex main impeller 19, a first-stage guide vane 22, a centrifugal impeller 23, an inducer 25, an inlet The pump cover 13 of pump body 27, an outlet.

[0023] The low-speed shaft 2 is connected with the motor through the coupling 1, the large gear 5 on the low-speed shaft meshes with the pinion 7 on the high-speed shaft, and the low-speed shaft 2 and the large gear 5 are integrated. The low-speed shaft 2 is supported by the front bearing 4 and the rear bearing 3, and the bearings 4 and 3 are installed in the gearbox 10.

[0024] The high-speed shaft 9 is borne by the front bearing 11 and the rear bearing 6, and the front bearing 11 is a high-speed bearing used as a pair. The front bearing 11 and the rear bearing 6 are lubricated by pressure lubricating oil passing through the nozzles 12 and 8, respectively. The mechanical seal 15 seals...

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Abstract

A low-flow high-life high-speed certrifugal vortex pump for liquid medium features that the electric motor is connected via shaft coupling to accelerating chamber dlow-speed shaft which is connected via gears to high-speed shaft with primary vortex blade wheel, and the inducing wheel and centrifugal propeller and set up in the front of primary vortex blade wheel. Its advnatages are low flow (0.2-10 cu.m / hr) and high lift (100-1800m).

Description

technical field [0001] The invention relates to a fluid conveying machine, in particular to a high-speed centrifugal vortex pump for a liquid medium with a small flow rate and a high lift. Background technique [0002] Existing pumps that can transport liquid media with small flow and high head and do not contain solid particles with a diameter greater than 0.1mm are mainly small flow centrifugal pumps, vortex pumps, multistage centrifugal pumps, return flow and reciprocating plunger pumps. [0003] The working speed of the small flow centrifugal pump is the synchronous speed of the motor at 2900r / min, and its impeller mainly has two types: open impeller and compound impeller. One of the main reasons for the low efficiency of centrifugal pumps with small flow rate and low specific speed is that the work consumed by the friction of the impeller disk occupies a large proportion of all losses. For a fully open impeller with a head coefficient of about...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D13/12F04D9/04F04D29/22
Inventor 朱祖超
Owner ZHEJIANG UNIV