CN216518813U - Vertical diagonal flow pump impeller and vertical diagonal flow pump - Google Patents

Abstract

The impeller is characterized by comprising a hub and a plurality of blades arranged on the hub, wherein the blades are in a three-dimensional space distortion model, and the section of any revolution surface of each blade from a blade inlet to a blade outlet is of an airfoil shape. Further, the hub is conical, and the blades are arranged on the conical surface. The utility model also discloses a vertical diagonal flow pump. The special design of the impeller can greatly improve the flow rate of the existing diagonal flow pump; the operating efficiency under the large-flow working condition can be obviously improved, and the purpose of saving energy consumption is achieved.

Description

Vertical diagonal flow pump impeller and vertical diagonal flow pump

Technical Field

The utility model relates to a water pump, in particular to a vertical diagonal flow pump, and belongs to the field of fluid machinery.

Background

Energy conservation, carbon consumption reduction and carbon consumption reduction become one of the major strategies for national development in the new period, and are also a significant market demand in reality. According to statistics, the power loss of power mechanical equipment in a typical thermal power plant is as high as 7% -11% of the total power generated by the power plant, wherein the energy consumption of only pump type fluid mechanical equipment accounts for more than half of the total energy consumption, and a large diagonal flow pump serving as a circulating water pump of the power plant is a large energy consumer, so that energy conservation, capacity expansion and reconstruction are necessary and are not slow at all.

An oblique flow pump, also called a vane mixed flow pump, is an optimized combination result of a centrifugal pump and an axial flow pump in the aspects of structure and performance, and is named because the conveyed fluid obliquely (between the radial direction and the axial direction) flows out of an impeller. The diagonal flow pump has the advantages of small occupied area, small outer diameter, easiness in starting, high efficiency and the like, and is a water pump with performance and structure between those of a centrifugal pump and an axial flow pump. The diagonal flow pump is mainly applied to a large-scale power plant as a cooling water circulating water pump, and is widely applied to the fields of metallurgy, urban water supply and drainage, farmland water supply and drainage, mining, sewage treatment and the like, and conveyed media comprise clear water, rainwater, sewage, seawater and the like. The related documents can refer to the Chinese invention patent application publication of ' improved vertical diagonal flow pump ' (publication number: CN1904376A) ' with application number of 200610029573.2; reference may also be made to the "vertical diagonal flow pump" of the chinese utility model patent No. ZL201620147712.0 (publication No. CN 205423181U).

The core flow passage component of the diagonal flow pump mainly comprises a guide vane body and an impeller. The guide vane body has the main functions of guiding flow, stabilizing flow and converting the kinetic energy of fluid flowing out of the impeller into pressure energy, and generally comprises an inner barrel shape, an outer barrel shape and guide vanes. The shape of the inner and outer cylinders of the guide vane body of the traditional diagonal flow pump is a waist drum shape, the radial size of the guide vane body is large, the size of the outer cylinder body of the water pump is increased for the vertical diagonal flow pump adopting a draw-out structure, and the manufacturing cost is high. Energy-conserving dilatation transformation of power plant's circulating water pump mainly is to the transformation of its core overflowing part guide vane body and impeller, nevertheless current diagonal flow pump can't satisfy the requirement of the energy-conserving dilatation transformation of pumping system, mainly is subject to current diagonal flow pump guide vane body and impeller structure, can't further promote the flow of pumping system by a wide margin.

The prior art discloses an impeller for a diagonal flow pump, which is shown in a Chinese utility model patent with a patent number of ZL201922401379.8 (an impeller for a seawater-resistant diagonal flow pump) (with an authorization notice number of CN21174753U), and the impeller disclosed by the document is also more traditional and cannot improve the flow.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide a vertical oblique flow pump impeller with a large capacity expansion amount in view of the above technical situation.

A second technical problem to be solved by the present invention is to provide a vertical diagonal flow pump with a large capacity expansion amount in view of the above technical situation.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: the impeller is characterized by comprising a hub and a plurality of blades arranged on the hub, wherein the blades are in a three-dimensional space distortion shape, and the section of any revolution surface of each blade from a blade inlet to a blade outlet is of a wing type.

The blade is convenient to manufacture and is integrally cast.

Further, the hub is conical, and the blades are arranged on the conical surface.

The technical scheme adopted by the utility model for solving the second technical problem is as follows: the utility model provides a vertical diagonal flow pump, includes horn mouth, impeller and guide vane body, and aforementioned guide vane body includes urceolus, inner tube and a plurality of guide vane, and aforementioned a plurality of guide vane arrange in the annular region of aforementioned urceolus inner wall and inner tube outer wall, the impeller locate the inner tube front end, the front end of urceolus is located to aforementioned horn mouth.

In order to improve the operation efficiency and save the energy consumption, the guide vane is in a three-dimensional space distortion shape, and the section of any revolution surface of the guide vane from the guide vane inlet to the guide vane outlet is in a wing shape.

The guide vane is convenient to manufacture and is formed by casting the guide vane integrally.

The rotational flow direction of the impeller is consistent with the flow guide direction of the guide vane body. The impeller and the guide vane body can be perfectly matched, the flowing characteristic of the outflow of the impeller can be improved, and the flowing efficiency in the diagonal flow pump is effectively improved.

Further, the outer cylinder comprises an outer straight cylinder and an outer conical cylinder connected to the inlet end of the outer straight cylinder, the outer straight cylinder is cylindrical, the large-caliber end of the outer conical cylinder is connected with the outer straight cylinder, and the guide vanes are arranged between the outer wall of the inner cylinder and the inner wall of the outer straight cylinder.

In order to improve the operation efficiency, the outer cylinder is connected with the bell mouth through an impeller chamber, the impeller chamber is in a conical shape corresponding to the hub, and a space for the blades to rotate is formed in the area between the impeller chamber and the hub.

Compared with the prior art, the utility model has the advantages that: based on the established novel three-dimensional flow hydraulic model, a high-efficiency blade flow pattern suitable for a large-flow diagonal flow pump is established, and the special design of an impeller can greatly improve the flow of the existing diagonal flow pump; the operating efficiency under the working condition of large flow can be obviously improved, the anti-cavitation property is strong, and the purpose of saving energy consumption is achieved; the high-efficiency working condition range is wide, and the requirements of the circulating water pump system of the power plant in the coastal region on the operation efficiency under the complex and changeable operation environment can be met. The utility model has the advantages of simple structure, small radial size and convenient manufacture. The guide vane body can perfectly match the flow characteristic of the outflow of the expanded impeller, and the flow efficiency in the diagonal flow pump is effectively improved.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1.

Fig. 2 is a perspective sectional view of fig. 1.

Fig. 3 is an exploded view of fig. 1.

Fig. 4 is an enlarged perspective sectional view of the guide vane body of fig. 3.

Fig. 5 is an enlarged view of the impeller of fig. 3 from another perspective.

FIG. 6 is a schematic view of a structure of an impeller in embodiment 2.

Fig. 7 is a schematic view of another perspective structure of the impeller in embodiment 2.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

In embodiment 1, as shown in fig. 1, 2, and 3, a vertical diagonal flow pump includes a bell mouth 3, an impeller 2, an impeller chamber 4, and a guide vane body 1, the impeller 2 is provided at a front end of an inner cylinder 11, the bell mouth 3 is provided at a front end of an outer cylinder 13, and a flow stabilizing fin 31 is provided in the bell mouth 3. The outer cylinder 13 is connected to the bell 3 through the impeller chamber 4.

As shown in fig. 4, the vane body includes an outer cylinder 13, an inner cylinder 11, and a plurality of vanes 12, and the plurality of vanes 12 are disposed in an annular region between an inner wall of the outer cylinder 13 and an outer wall of the inner cylinder 11. The outer cylinder 13 includes an outer straight cylinder 131 and an outer tapered cylinder 132 connected to the inlet end of the outer straight cylinder 131, the outer straight cylinder 131 is cylindrical, the large-diameter end of the outer tapered cylinder 132 is connected to the outer straight cylinder 131, and the guide vane 12 is disposed between the outer wall of the inner cylinder 11 and the inner wall of the outer straight cylinder 131.

The guide vane 12 is a three-dimensional space twisted model, and the section of any revolution surface of the guide vane 12 from the inlet of the guide vane 12 to the outlet of the guide vane 12 is a wing type. The guide vanes 12 are integrally cast.

Referring to fig. 5, the present embodiment discloses a semi-open impeller, which specifically includes a hub 22 and a plurality of blades 21 disposed on the hub 22, a main shaft 5 is disposed in the middle of the hub 22, the blades 21 are in a three-dimensional twisted shape, and a cross section of any revolution surface of the blades 21 from an inlet of the blades 21 to an outlet of the blades 21 is an airfoil shape. The blade 21 is integrally cast. The hub 22 is conical in shape, and the blades 21 are arranged on the conical surface. The impeller chamber 4 is also conical in shape corresponding to the hub 22, and the region between the impeller chamber 4 and the hub 22 forms a region in which the blades 21 rotate.

The rotational flow direction of the impeller 2 in the embodiment is consistent with the flow guiding direction of the guide vane body 1, and the rotational flow direction and the flow guiding direction are matched with each other. Nine guide vanes and five guide vanes. The second inner cone 113, the bell mouth 3 and the impeller chamber 4 are respectively provided with a reinforcing rib 61, a reinforcing rib 63 and a reinforcing rib 62.

The guide vane body is matched with the impeller, so that the expansion is better completed, the flow of the conventional inclined flow pump can be greatly improved, and the expansion capacity can reach more than 30 percent; the operating efficiency under the working condition of large flow can be obviously improved, and the energy saving rate reaches more than 15%; the high-efficiency working condition range is wide, and the requirements of the circulating water pump system of the power plant in the coastal region on the operation efficiency under the complex and changeable operation environment can be met. The utility model has the advantages of simple structure, small radial size and convenient manufacture. The guide vane can perfectly match the flow characteristic of the outflow of the expanded impeller, and the flow efficiency in the diagonal flow pump is effectively improved.

In embodiment 2, as shown in fig. 6 and 7, the impeller in this embodiment is a closed impeller, and specifically includes a hub 22, a plurality of blades 21 provided on the hub 22, and a shroud 23 provided on the outer periphery of the blades. Other structures refer to example 1.

In order to enable the fluid flowing out of the rotating impeller to smoothly flow into the guide vane inlet, the impact loss possibly caused by the impeller flowing out of the guide vane inlet is reduced. The impeller has blades and guide vanes in three-dimensional design to reduce the impact loss at the inlet of the guide vane body and the flow loss inside the guide vane body. Meanwhile, the impeller blade adopts a high-efficiency blade flow pattern constructed by a full three-dimensional design, so that the capacity is greatly expanded, the flow efficiency in the impeller is improved, and particularly the efficiency of the diagonal flow pump under a large-flow working condition is greatly improved.

Claims (9)

1. The impeller of the vertical diagonal flow pump is characterized by comprising a hub (22) and a plurality of blades (21) arranged on the hub (22), wherein the blades (21) are in a three-dimensional space distortion shape, and the section of any revolution surface of the blades (21) from a blade inlet to a blade outlet is of an airfoil shape.

2. The vertical oblique flow pump impeller according to claim 1, wherein the vanes (21) are integrally cast.

3. A vertical oblique flow pump impeller according to claim 1, wherein said hub (22) is conical and said vanes (21) are disposed on the conical surface.

4. A vertical diagonal flow pump with the impeller of any one of claims 1 to 3, comprising a bell mouth (3), an impeller (2) and a guide vane body (1), wherein the guide vane body (1) comprises an outer cylinder (13), an inner cylinder (11) and a plurality of guide vanes (12), the plurality of guide vanes (12) are arranged in an annular region between the inner wall of the outer cylinder (13) and the outer wall of the inner cylinder (11), the impeller (2) is arranged at the front end of the inner cylinder (11), and the bell mouth (3) is arranged at the front end of the outer cylinder (13).

5. The vertical diagonal flow pump according to claim 4, characterized in that the guide vane (12) is of a three-dimensional twisted shape, and the section of any revolution surface of the guide vane (12) from the inlet of the guide vane (12) to the outlet of the guide vane (12) is of a wing type.

6. The vertical diagonal flow pump according to claim 5, wherein the guide vanes (12) are integrally cast.

7. The vertical diagonal flow pump according to claim 4, characterized in that the direction of the swirling flow of the impeller (2) is in accordance with the direction of the flow guiding of the guide vane body (1).

8. The vertical diagonal flow pump according to claim 4, wherein the outer cylinder (13) comprises an outer straight cylinder (131) and an outer tapered cylinder (132) connected to an inlet end of the outer straight cylinder (131), the outer straight cylinder (131) is cylindrical, a large-caliber end of the outer tapered cylinder (132) is connected to the outer straight cylinder (131), and the guide vane (12) is disposed between an outer wall of the inner cylinder (11) and an inner wall of the outer straight cylinder (131).

9. The vertical diagonal flow pump according to claim 8, wherein the outer cylinder (13) is connected to the bell mouth (3) through an impeller chamber (4), the impeller chamber (4) is conical corresponding to the hub (22), and a space for the rotation of the blade (21) is formed in a region between the impeller chamber (4) and the hub (22).

Images