Follow closely the trend of technological development of the Chinese pump industry, accurately grasp the development trend of pump
technology is the basis of the pump business growth in China. Pump technology development, as development of other industries, as is
achieved by a market driven by demand. Today s twenty-first century, the huge demand generated by the field of environmental protection,
electronics and other high-tech development and world sustainable development of the main background for the pump industry, including
many of the industries or areas have brought changes in technology and rapid development. Pump technology trends, the following points:
Pump product diversification
The vitality of the product is the market demand. Today s market demand is asking to have their own characteristic features, to be
different; exactly this, creating a product diversification trend of pump. Its diversity reflects the diversity of media in the pump,
several aspects of the product mix differences and different operational requirements.
From the diversity of transmission media, the delivery of the first pump for a single water and the flow of liquid, gas or slurry, and
solid-liquid mixture, the gas-liquid mixture, solid liquid gas mixture until the conveyor living objects such as soybean, fish, and so
on. The delivery of objects for the internal structure of the pump requirements.
In addition to conveying the object structure of the pump have different requirements, in the form of installation of the pump, piping
layout. Maintenance have put forward new requirements for maintenance and other aspects of internal or external structure of the pump.
Various manufacturers in the design of the structure, adding the concept of their respective companies, and to raise the pump structure
diversification.
Based on the overall context of sustainable development and environmental protection, the design of the operating environment of the
pump to pump a large number of requirements, such as leak reduction, reduced noise and vibration, increase reliability, longevity and so
on the design of the pump side focus or a few focus on the parallel need to be taken into account, are bound to form a diversified form
of pump.
Pump product standardization and modular
Product diversification at the same time, the pump, as generic products, the overall total is still huge. In the market, in addition to
the technical competition, product price competition, particularly price competition of generic products is an inevitable trend. Trend
of diversification of products, the price of a product to achieve competitive advantage, improve the level of standardization of product
components, modular product components is necessary. In the number of components, modular, through a combination of different modules or
change the characteristics of the individual parts, in order to achieve product diversification. The same time, only when the parts
standardization improved to reduce production costs and the formation of price-competitive products, product diversification, product
diversification on the basis of the actual size of the parts production, on the basis of further shorten the delivery cycle of the
product.
Pump design standards to enhance manufacturing technology to optimize the organic combination of
Into the information age today, the design of the pump already using computer technology to product development and design (such as the
use of CAD) greatly improves the speed of the design itself, shortening the product design cycle. -Based manufacturing in the production
of CNC Technology CAM manufacturing technology which has been deep pump production. However, the domestic situation in a few days ago,
the CNC Technology CAM applications in bulk products production. Single piece or small batch production, CAM technology is not yet
common in the pump industry in which the implementation of single and small batch production is still traditional production equipment.
As the market requires manufacturers of the goods as short as possible, especially for special products (products) shorten the delivery
cycle for the user requirements will inevitably require the manufacturers of the pump to accelerate the use of CAM technology, or even a
computer integrated manufacturing system (CIMS). Flexible manufacturing (FMC and FMS) Once the design is complete, the processing of the
product components tend to the same period is completed, to shorten the production cycle to ensure that the manufacture of molds, parts
processing from design to ensure a coordinated response to ensure
At the same time, unless the use of computer graphics will be on the computer as a carrier strength of the product analysis, reliability
prediction and three-dimensional design, the original need to find and resolve process problems in production, the local structure and
assembly issues raised to the pre-production to prevent, shorten the trial period.
CAD-based technology is widely used
(1) pump dies, leaves, and important parts CNC machining, which can improve the manufacturing quality of the pump is shown in
Figure 1 the three-dimensional map of the CNC milling machine axial flow blades for processing leaves.
(2) pump hydraulic design and painting software gradually instead of manual calculation and drawing someone asked how high the
efficiency of the software design of the pump, which is a layman to say, no matter how good the software but also to use, can be
integrated into the design those design ideas and experience, and fast and accurate. Figure 2 is a hydraulic diagram of JP1 software
design of the screw centrifugal pump impeller design diagram just 10min, artificial design may take two days.
(3) The pump flow field calculation of the non-viscous flow of the quasi-ternary quasi-ternary non-viscous flow to the progress of
the full ternary viscous flow calculation method is S1, S2 two types of stream surface iteration, it is three-dimensional flow
dimensionality reduction into two-dimensional flow on the meridian plane (axial plane) and any transfer surface (surface flow) iterative
solution to solve the problem of three-dimensional flow. Due to the complex three-dimensional flow is simplified to a two-dimensional
solving, making the accuracy of the solution to be affected. Computational Fluid Dynamics (Computational Fluid Dynamics) in recent
years, referred to as CFD advent of new ideas and means for fluid mechanical flow field calculation. Using CFD flow field calculation,
is first necessary to calculate the regional painting into three-dimensional entity, and then generate a grid (Grid Generation), then
the commercial CFD software Fluent calculated, as shown in Figure 3.
(4) internal flow field measurements before frequently used probe measurements, on the one hand control of the needle itself is a
great influence on the flow the other hand, measurement conversion device of the rotating flow field is very complex. Further use of
laser Doppler velocimetry instrument (LVD), it is the flow of particles in laser optical particle scattering measurement of flow rate,
according to the degree of scattering. This method has been mature and widely used, but generally only measure a component of a little
speed. Now start using particle image velocimetry (PIV), its working principle is the spread of tracer particles in the flow field, flow
field pulse-chip light source, twice or multiple exposure, particle images are recorded on the film The resulting flow field velocity
distribution. This method to break through the traditional single-point measurement limit can be instantaneous, non-contact measurement
of the velocity distribution on a cross-section, high measuring accuracy.
(5) The optimal design method in order to improve the performance of the pump, many scholars to study the optimal design method.
Summarized in the following ways: excellent model statistics based on the speed coefficient optimization method; minimum hydraulic loss
loss of extremal optimization method; an indicator for the objective function criteria for filter optimization method. Worthy of note is
the optimal design method may only guidance on the design of the concrete pump. In addition, the advent of the CFD and other advanced
technology, in large part to dilute the interest in the optimized design, the past two years, scholars of optimal design method is
gradually reduced.
Upgrading of pump intrinsic properties and the pursuit of external features
The intrinsic properties of the pump means, including the inherent characteristics of product performance, quality of the parts, the
whole assembly quality, appearance and quality of products, referred to as quality. At this point, many pump manufacturers is also of
concern to strive to further improve, improvement. In fact, we can find many products in the factory test and found to comply with the
hair to use the unit to run, often up to less than factory factory testing results, such as overload occurs, the noise increases, the
use of below standard or reduced life and other issues; pump in which the operating point in practice or operating characteristics,
which we call the external characteristics of the pump or system features.
Technical staff during product design, to improve one percent efficiency of a product often spend a lot of thought; pump run deviate
from the design of efficient points, the actual operation efficiency is much more than a one percent reduction. Now, the pump
manufacturer as well as user support, including frequency conversion, including control equipment and equipment, in fact, have been
involved to the pursuit of the external characteristics of the pump. This basis, the concentration of pump control system, the entire
pump and pumping station operating efficiency, a higher level in the pursuit of the external characteristics of the pump.
From the sales perspective, selling products in the marketing of the intrinsic properties of the pump; external characteristics is
concerned about the pump manufacturers not only to sell products, but also in the marketing of the pumping station (complete projects).
From the use of perspective, a good product must be suitable operating environment products rather than the products of factory testing
discriminant.
To accelerate the use of new materials and new technology
Over the years, the use of new materials and new technology is a major factor in promoting the development of pump technology. Pump
materials from cast iron to a special metal alloy, a typical non-metallic materials to rubber products, ceramics and other engineering
plastics, resistant to corrosion in the solution to the pump, wear resistance, high temperature environment have played a prominent
role. The use of new technology to better enable the use of new materials to the pump parts and the whole pump. If some foreign
manufacturers have designed and launched all engineering plastic pump. No less in intensity than the general metal production pump,
superior wear and corrosion resistance. Another example is the use of the new surface coating technology and surface treatment
technology, the same can solve the corrosion resistance and anti-wear of the pump. New materials for further development and use of new
technology in depth, will be more extensive in the pump field.
The further development of mechatronic
As scientific and technological development. Interdisciplinary science and technology at this stage, more and more rich,
interdisciplinary, interdisciplinary joint research is a very common thing, as the pump technology development is also true. Shielded
pump, for example, to cancel the pump seal, must start from the motor structure is limited to the pump itself, there is no way to solve
the noise problem of the pump, in addition to solve the flow pattern and vibration of the pump, at the same time need to be addressed
motor fan noise and electromagnetic noise; to improve the reliability of submersible pumps, submersible motor additional measures such
as leakage protection, overload protection; improve the operating efficiency of the pump shall be by means of the use of control
technology. These are all details to develop the level of pump technology, must proceed from supporting the motor, control technology
and other aspects, taken together, to maximize the mechanical and electrical integration level.
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