CN204419689U - A kind of impeller of novel current stabilization centrifugal pump - Google Patents

Abstract

The utility model proposes a novel impeller of a steady-flow centrifugal pump, which includes blades and an impeller rear cover, and the blades are arranged on the rear cover of the impeller. The blades include four long blades, and the four long blades are circumferentially equally spaced distribution. Just confirm the most suitable arc transition value by designing the arc at the junction of the blade and the impeller back cover. The connection between the blade and the back cover of the impeller is an arc connection, and the parameters of the arc are determined together with the height of the blade and the diameter of the impeller outlet. The utility model can improve the flow distribution near the contact between the blade and the back cover plate of the impeller, make the flow line distribution and pressure distribution more uniform, reduce the reverse pressure gradient, and improve the performance of the centrifugal pump.

Description

The impeller of a new steady flow centrifugal pump

technical field

The utility model belongs to the field of impeller machinery and relates to a centrifugal pump, in particular to a novel impeller of a steady-flow centrifugal pump.

Background technique

Centrifugal pumps, as one of the most important power devices in the contemporary era, are widely used in various sectors of the national economy and cutting-edge technical fields such as aerospace. Improving the efficiency of centrifugal pumps can make full use of limited energy and improve economic benefits. Therefore, improving the research and design level of centrifugal pumps has an important impact on national economic development, energy conservation and environmental protection. Impeller machinery mainly refers to working machines that use liquid as a medium, mainly centrifugal pumps. The pump is a kind of impeller machinery, and it is also a general-purpose machine with a wide range of applications. It can be said that wherever there is liquid flow, there is pump work. With the development of science and technology, the application field of pumps is rapidly expanding. According to statistics from different countries, the power consumption of pumps accounts for about 1/5 of the total power generation in each country. It can be seen that the energy consumption of pumps is huge, so improving the level of pump technology Saving energy is of great significance.

During the operation of the centrifugal pump, when the water flows through the inlet, impeller, volute and other components, complex flow phenomena such as friction, collision, secondary flow, backflow, and vortex will occur. The impeller is an important flow-passing part in the operation of the centrifugal pump. The flow channel of the centrifugal pump is a diffusion channel, and the boundary layer separation is relatively easy to form in the diffusion channel, and the vortex, secondary flow and jet-wake phenomenon are also easy to appear at the outlet part of the flow channel. The phenomena of vortex, secondary flow and jet-wake have a great influence on the performance of the centrifugal pump, so improving the flow conditions in the channel has a great influence on the performance of the centrifugal pump.

Contents of the invention

The purpose of this utility model is to provide a novel impeller of a steady-flow centrifugal pump in view of the deficiencies in the existing research. The flow of the improved centrifugal pump near the blade and the back cover of the impeller has been significantly improved.

The utility model comprises a novel impeller of a steady-flow centrifugal pump, including blades and an impeller back cover, and the blades are arranged on the impeller rear cover. , the joint between the blade and the impeller rear cover adopts a smooth arc transition, and the arc radius parameter is determined by the blade height and the impeller diameter. The relationship is: R=0.35*(D ₁ /h), where R is the radius of the arc, D ₁ is the diameter of the impeller outlet, and h is the height of the blade.

The beneficial effects of the utility model:

The utility model can improve the streamline distribution and vector distribution of the centrifugal pump near the contact between the blade and the back cover plate of the impeller by optimizing the connection between the centrifugal pump blade and the wheel disc, so that the pressure distribution becomes uniform and the reverse pressure gradient changes At the same time, the flow phenomena such as cross flow and vortex are reduced, and the internal flow condition is improved.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is an enlarged view of the contact part between the blade and the rear cover of the impeller in Fig. 1 .

Figure 3 is a cross-sectional view of the contact part between the blade and the impeller back cover in Figure 2.

Explanation of reference numerals: including blade 1 , impeller back cover 2 , arc transition 3 at the contact part of blade and impeller back cover.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, Figure 2, and Figure 3, the impeller of a new type of steady-flow centrifugal pump includes blade 1 and impeller back cover 2, and the enlarged view of the joint between blade 1 and impeller back cover 2 is shown in Figure 2 shown. In Fig. 2, the fillet transition between the blade 1 and the impeller rear cover is shown in Fig. 3. The parameters of the arc are determined together with the height of the blade and the diameter of the impeller outlet. The specific relationship is: R=0.35*(D ₁ /h) (where R is the radius of the arc, D ₁ is the diameter of the impeller outlet, and h is the height of the blade). The diameter of the impeller outlet is D ₁ =470mm, the height of the blade is h=80mm, and the radius of the fillet transition calculated by the above relational formula is R=3.82mm;

The impeller of the new steady-flow centrifugal pump changes the connection between the blade and the back cover of the impeller into a circular arc transition, which can effectively improve the distribution of the streamline near the contact between the blade and the back cover of the impeller, and the pressure distribution near the impeller becomes more uniform, reverse Variations in pressure gradients were also reduced.

Claims (1)

1. The impeller of a novel steady-flow centrifugal pump comprises a blade and an impeller rear cover, and the blade is arranged on the impeller rear cover, and the blades include four long blades, and the four long blades are distributed at equal intervals in the circumferential direction, It is characterized in that: the connection between the blade and the impeller rear cover adopts a smooth arc transition, and the arc radius parameter is determined by the height of the blade and the diameter of the impeller. The relationship is: R=0.35*(D ₁ /h ), where R is the radius of the arc, D ₁ is the diameter of the impeller outlet, and h is the height of the blade.