A separate transmission type compact circulating water tunnel

Abstract

A separate transmission compact circulating water tunnel includes a return section, an experimental section, a multi-blade water pump, a transmission device, and a motor. The return section is concave in shape, with two symmetrical openings at the top, an experimental section disposed between the two openings, and a multi-blade water pump disposed in an opening on one side. The motor is disposed outside the return section and is connected to the multi-blade water pump via a transmission device. The motor and the multi-blade water pump utilize a contactless sealed transmission. The present invention has an integrated structure and occupies a small area. The addition of a magnetic transmission device eliminates the dynamic seal module, completely separating the water pump blades from the motor using the magnetic transmission device, eliminating the risk of leakage from the dynamic seal components, the risk of electric shock, and the corresponding energy loss.

Description

Technical Field

[0001] The invention belongs to the technical field of laboratory water tunnels, and in particular relates to a separate transmission type compact circulating water tunnel. Background Art

[0002] Water tunnels are an important type of experimental equipment, widely used in various research studies. Water tunnels are divided into gravity water tunnels and circulating water tunnels. Circulating water tunnels can provide water with a higher flow rate, but these water tunnels occupy a larger area and have a smaller flow cutoff area in the experimental section. The power unit water pump requires dynamic sealing components, which not only incurs additional manufacturing costs but also increases the risk of leakage. The water flow cutoff shape formed by traditional axial flow water pumps is circular, while the cutoff shape required in the experimental section is rectangular, requiring additional rectifiers and affecting the flow field quality. Summary of the Invention

[0003] The purpose of the present invention is to provide a separate transmission type compact circulating water tunnel to solve the problems of the prior art such as large floor space, high manufacturing cost, poor sealing performance, and mismatch with the experimental cut-off shape.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A separate transmission compact circulating water tunnel comprises a reflux section, an experimental section, a multi-blade water pump, a transmission device and a motor; the reflux section is concave in shape, with two openings symmetrically provided on the top, an experimental section provided between the two openings, and a multi-blade water pump provided in the opening on one side; the motor is provided outside the reflux section and is connected to the multi-blade water pump through the transmission device; the motor and the multi-blade water pump are driven by a contactless seal.

[0006] Furthermore, the transmission device is an axial magnetic coupling, one end of the axial magnetic coupling is connected to the output end of the motor, and the other end is coaxially connected to the multi-blade water pump.

[0007] Furthermore, the axial magnetic coupling is divided into an inner magnetic coupling and an outer magnetic coupling, the inner magnetic coupling is arranged on the output end of the motor, and the outer magnetic coupling is arranged at the end of the multi-blade water pump.

[0008] Furthermore, the axial magnetic coupling includes a coupling housing and permanent magnets; the permanent magnets are staggered and embedded in the coupling housing in a centrally symmetrical manner, and adjacent permanent magnets have opposite polarities.

[0009] Furthermore, a motor housing is fixedly provided on the outside of the reflux section, and the motor is arranged in the motor housing.

[0010] Furthermore, the multi-blade water pump is installed in the opening on one side of the reflux section through a support bearing device.

[0011] Further, the multi-wing water pump includes an upper turbine end plate, arc-shaped blades, and a lower turbine end plate; a number of arc-shaped blades are vertically arranged between the upper turbine end plate and the lower turbine end plate in a centrally symmetric manner; D1 is the outer diameter of the arc-shaped blade installation, D2 is the inner diameter of the arc-shaped blade installation, and α is the angle between the chord line of the arc-shaped blade curve and the concentric circle of the center of the upper turbine end plate and the arc-shaped blade; the installation relationship between the arc-shaped blade and the upper turbine end plate and the lower turbine end plate is 1.1 < D1 / D2 < 2, 30° < α < 120°, and 4 < the number of blades < 20.

[0012] Further, a number of layers of arc-shaped guide vanes are equidistantly arranged in the opening on the other side of the return section. One end of the arc-shaped guide vane is located at the bottom of the return section, and the other end is located at the opening on the other side of the return section.

[0013] Further, the middle diameter of the experimental section is smaller than the diameters at both ends.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] The present invention is an integrated structure with a small floor area; the addition of the magnetic drive device eliminates the dynamic seal module. The magnetic drive device is used to completely separate the water pump blades and the motor, eliminating the leakage risk, electric shock risk, and corresponding energy loss of the dynamic seal components.

[0016] The present invention designs a water pump composed of multiple arc-shaped blades installed in a centrally symmetric manner. The overall water pump is a cylinder, and the cross-sectional shape of the water outlet is rectangular. Compared with the circular water outlet of the axial flow water pump, the new water pump does not require excessive guide devices, diffuser devices, and turning devices to form the final required rectangular water outlet, which not only improves the quality of the flow field but also reduces the generation of local losses, and correspondingly reduces the energy waste and noise caused by local losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Axonometric view of a separated drive type compact circulating water tunnel

[0018] Figure 2 Front view of a separated drive type compact circulating water tunnel

[0019] Figure 3 Perspective axonometric view of a separated drive type compact circulating water tunnel

[0020] Figure 4 Perspective front view of a separated drive type compact circulating water tunnel

[0021] Figure 5 Perspective side view of a separated drive type compact circulating water tunnel

[0022] Figure 6 Perspective axonometric view of the main body of a separated drive type compact circulating water tunnel

[0023] Figure 7 A perspective main view of a split-drive compact water circulation tunnel main body

[0024] Figure 8 Axonometric drawing of a water pump unit

[0025] Figure 9 Front view of the water pump unit

[0026] Figure 10 Side view of the water pump unit

[0027] Figure 11 Front view of the parts of the axial magnetic coupling 6

[0028] Figure 12 Axonometric drawing of the parts of the axial magnetic coupling 6

[0029] Figure 13 Axonometric view of the parts of the multi-blade water pump 5

[0030] Figure 14 Front perspective view of multi-blade water pump 5

[0031] Figure 15 Main view of the working diagram of a split-drive compact circulating water tunnel

[0032] Figure 16 A top view of the working diagram of a split-drive compact circulating water tunnel

[0033] in:

[0034] Reflux section 1, experimental section 2, arc-shaped guide vanes 3, support bearing device 4, multi-blade water pump 5, axial magnetic coupling 6, motor 7, motor housing 8, coupling housing 61, permanent magnet 62, turbine upper end plate 51, arc blades 52 and turbine lower end plate 53. DETAILED DESCRIPTION

[0035] The present invention is further described below with reference to the accompanying drawings:

[0036] The present invention consists of a reflux section 1, an experimental section 2, an arc-shaped guide vane 3, a supporting bearing device 4, a multi-blade water pump 5, an axial magnetic coupling 6, a motor 7, and a motor housing 8.

[0037] Figure 1 and Figure 2 The axonometric and front views of a split-drive compact water circulation tunnel are shown. The experimental section 2 is mounted on top of the return section 1. The motor housing 8 is mounted on the upper side of the return section 1.

[0038] Figure 3 , Figure 4 and Figure 5They are respectively the perspective axonometric view, the perspective front view and the perspective side view of a separated drive type compact circulating water tunnel. The arc-shaped guide vane 3 is installed in the return section 1, and one end of the arc-shaped guide vane 3 is at the entrance of the test section 2, playing a role in rectifying and guiding the flow. The support bearing device 4 is installed on both sides of the return section 1. The multi-wing water pump 5 is installed on the support bearing device 4, and the multi-wing water pump 5 can rotate in the return section 1 to generate a continuously flowing water stream. The inner side of the axial magnetic coupling 6 is installed on the side of the multi-wing water pump 5 close to the motor 7, and the outer side of the axial magnetic coupling 6 is installed on the shaft of the motor 7. The outer side of the axial magnetic coupling 6 and the motor 7 are installed in the motor housing 8.

[0039] Figure 6 and Figure 7 They are respectively the perspective axonometric view and the perspective front view of the main body of a separated drive type compact circulating water tunnel. The arc-shaped guide vane 3, the support bearing device 4, the multi-wing water pump 5 and the inner side of the axial magnetic coupling 6 are installed in the return section 1.

[0040] Figure 8 , Figure 9 and Figure 10 are the axonometric view, the front view and the side view of the water pump device. The water pump device is composed of the support bearing device 4, the multi-wing water pump 5 and the inner side of the axial magnetic coupling 6, and is installed in the return section 1.

[0041] Figure 11 and Figure 12 They are respectively the front view of the parts and the axonometric view of the parts of the axial magnetic coupling 6. The axial magnetic coupling 6 is composed of a coupling housing 61 and a permanent magnet 62. Among them, the permanent magnet 62 is staggeredly embedded in the coupling housing 61 in a centrosymmetric manner to achieve non-contact transmission.

[0042] Figure 13 and Figure 14 They are respectively the perspective axonometric view of the parts and the perspective front view of the multi-wing water pump 5. The multi-wing water pump 5 is composed of an upper turbine end plate 51, an arc-shaped blade 52 and a lower turbine end plate 53. The arc-shaped blade 52 is installed between the upper turbine end plate 51 and the lower turbine end plate 53 in a centrosymmetric scheme. D1 is the outer diameter of the installation of the arc-shaped blade 52, D2 is the inner diameter of the installation of the arc-shaped blade 52, and α is the included angle between the chord line of the curve of the arc-shaped blade 52 and the concentric circle of the center of the upper turbine end plate 51 and the arc-shaped blade 52. The installation relationship between the arc-shaped blade 52 and the upper turbine end plate 51 and the lower turbine end plate 53 is 1.1 < D1 / D2 < 2, 30° < α < 120°, and 4 < the number of blades < 20.

[0043] Figure 15 and Figure 16 They are respectively the front view and the top view of the working schematic diagram of a separated drive type compact circulating water tunnel. As Figure 15 shown, the multi-wing water pump 5 rotates clockwise to generate a downward water stream. As Figure 16As shown, under the rectifying effect of the contraction section of experimental section 2, the water flow velocity and water flow quality flowing into experimental section 2 are improved.

[0044] The core of this invention lies in the design of a compact, split-drive circulating water tunnel. This invention features a water pump comprised of multiple centrally symmetrically mounted circular blades. The pump is cylindrical in shape, with a rectangular outlet cross-section. Compared to the circular outlet of an axial-flow pump, this new pump eliminates the need for numerous guides, expansion devices, and turning devices to create the desired rectangular outlet. This not only improves flow field quality but also reduces local losses, and consequently, the energy waste and noise associated with these losses.

[0045] The pump blades and motor are connected by a separate magnetic connection, using non-metallic materials that are not magnetically isolating to ensure the strength of the magnetic connection. This separates the originally integrated cavity into two completely independent cavities, eliminating the dynamic sealing components and eliminating the risk of leakage, electric shock, and corresponding energy loss.

Claims

1. A separate transmission type compact circulating water tunnel, characterized in that: It includes a reflux section (1), an experimental section (2), a multi-wing water pump (5), a transmission device, and a motor (7); the reflux section (1) is concave-shaped, two openings are symmetrically arranged at the top of the reflux section (1), the experimental section (2) is arranged between the two openings, and the multi-wing water pump (5) is arranged in one of the openings; the motor (7) is arranged outside the reflux section (1) and is connected to the multi-wing water pump (5) through the transmission device; the motor (7) and the multi-wing water pump (5) are in non-contact sealed transmission; The transmission device is an axial magnetic coupling (6), one end of the axial magnetic coupling (6) is connected to the output end of the motor (7), and the other end is coaxially connected to the multi-wing water pump (5); The axial magnetic coupling (6) is divided into an inner magnetic coupling and an outer magnetic coupling. The inner magnetic coupling is arranged on the output end of the motor (7), and the outer magnetic coupling is arranged at the end of the multi-wing water pump (5); The axial magnetic coupling (6) includes a coupling housing (61) and permanent magnets (62); the permanent magnets (62) are symmetrically and staggeredly embedded in the coupling housing (61) in a central symmetry manner, and the adjacent permanent magnets (62) have opposite polarities; The multi-wing water pump (5) includes a turbine upper end plate (51), arc-shaped blades (52), and a turbine lower end plate (53); a number of arc-shaped blades (52) are vertically arranged between the turbine upper end plate (51) and the turbine lower end plate (53) in a central symmetry manner; D1 is the outer diameter of the arc-shaped blade (52) installation, D2 is the inner diameter of the arc-shaped blade (52) installation, and α is the included angle between the curve chord of the arc-shaped blade (52) and the concentric circle of the center of the turbine upper end plate (51) and the arc-shaped blade (52); the installation relationship between the arc-shaped blade (52) and the turbine upper end plate (51) and the turbine lower end plate (53) is 1.1 < D1 / D2 < 2, 30° < α < 120°, and 4 < the number of blades < 20.

2. A separate transmission type compact circulating water tunnel according to claim 1, characterized in that: A motor housing (8) is fixedly arranged outside the reflux section (1), and the motor (7) is arranged inside the motor housing (8).

3. The separated transmission compact circulating water tunnel according to claim 1 is characterized in that: The multi-wing water pump (5) is installed in one of the openings on one side of the reflux section (1) through a support bearing device (4).

4. A separate transmission type compact circulating water tunnel according to claim 1, characterized in that: A number of layers of arc-shaped guide vanes (3) are arranged at equal intervals in the other opening on one side of the reflux section (1). One end of the arc-shaped guide vane (3) is located at the bottom of the reflux section (1), and the other end is located at the other opening of the reflux section (1).

5. The separated transmission compact circulating water tunnel according to claim 1 is characterized in that: The middle diameter of the experimental section (2) is smaller than the diameters at both ends.

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