Air inlet duct for fan test bench

Abstract

The utility model discloses an air inlet duct for a fan test bench, and relates to the technical field of fan test equipment, the air inlet duct comprises a first air inlet pipe and a second air inlet pipe, the first air inlet pipe and the second air inlet pipe are connected with each other through an electric control valve, the electric control valve comprises a valve body, a plurality of groups of valve plates are movably installed in the valve body, and the valve plates are connected with the first air inlet pipe and the second air inlet pipe. A rotating ring is rotationally installed on the outer wall of the valve body, and the multiple sets of valve plates are connected through the rotating ring. According to the design scheme, through the design that the first air inlet pipe and the second air inlet pipe are connected through the electric adjusting valve, when a fan performance experiment is carried out, the rotating ring is driven by the servo motor to rotate around the valve body, each group of valve plates can synchronously rotate under the action of the rotating ring, and therefore the purpose of adjusting the air volume is achieved; therefore, hard paper sheets do not need to be thrown into the pipeline manually, the test precision is effectively improved, the air inlet pipe does not need to be cleaned after the test is finished, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan testing equipment, in particular to an air intake duct used for a fan test bench. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Performance testing of a fan is to identify the performance of the fan to meet the purpose of factory inspection. The main testing parameters of fan performance include air volume, air pressure, fan efficiency, wind speed, noise value, fan vibration value and fan sealing. Among them, air volume = outlet area multiplied by wind speed, so wind speed measurement is the main item of fan performance test.

[0003] In order to control the air volume, the existing fan test bench usually adopts the method of throwing cardboard into the air intake duct 1' from the air intake end, blocking the mesh holes of the rectifying grid 2' with the cardboard, thereby reducing the air duct area to achieve the purpose of controlling the air volume. However, in the above test method, the cardboard blocks the mesh holes of the rectifying grid 2' with a large randomness, and too many paper pieces are often thrown in, thereby affecting the test accuracy. After the test is completed, it is necessary to rely on manual cleaning out of the air intake duct with the paper pieces, affecting the test efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects existing in the prior art, the utility model provides an air intake duct for a fan test bench.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an air intake duct for a fan test bench, comprising a first air intake duct and a second air intake duct, the first air intake duct and the second air intake duct are interconnected via an electric regulating valve, the electric regulating valve comprises a valve body, a plurality of groups of valve plates are movably mounted on the valve body, a swivel is rotatably mounted on the outer wall of the valve body, the plurality of groups of valve plates are interconnected via the swivel, and a servo motor for driving the swivel is also fixedly mounted on the outer wall of the valve body.

[0006] Furthermore, the valve body is a tubular structure corresponding to the first air inlet pipe and the second air inlet pipe, a central axis is provided at the axis of the valve body, fixing rods are fixedly installed at both ends of the central axis, the end of the fixing rod away from the central axis is fixedly installed on the valve body, a plurality of groups of valve plate annular arrays are distributed between the central axis and the valve body, the valve plate is a fan-shaped structure, a first rotating shaft is provided at one end of the valve plate close to the central axis, the first rotating shaft is rotatably installed on the central axis, a second rotating shaft is provided at one end of the valve plate close to the valve body, the second rotating shaft is rotatably installed on the inner wall of the valve body.

[0007] Furthermore, a plurality of groups of roller frames are distributed in an array on the outer wall of the valve body, support rollers are rotatably mounted on the roller frames, and a slide rail matching the support rollers is provided on the inner wall of the rotating ring.

[0008] Furthermore, a connecting plate is fixedly installed at the end of the second rotating shaft, a waist-shaped hole is opened on the connecting plate, and a plurality of connecting rods matching the waist-shaped holes are fixedly installed on the outer wall of the rotating ring, and the connecting rods are installed in the waist-shaped holes.

[0009] Furthermore, the servo motor is rigidly fixedly mounted on the outer wall of the valve body, a bevel gear is fixedly mounted on the power output end of the servo motor, and a bevel gear ring meshing with the bevel gear is fixedly mounted on the rotating ring.

[0010] Furthermore, an air uniformity plate is fixedly mounted on one end of the second air inlet pipe close to the valve body, and a plurality of groups of ventilation holes are formed on the air uniformity plate.

[0011] The beneficial effect of the utility model is that the design of the utility model is designed to connect the first air inlet pipe and the second air inlet pipe with each other through an electric regulating valve. When conducting a fan performance test, the servo motor drives the swivel to rotate the valve body, and each group of valve plates rotates synchronously under the action of the swivel, thereby achieving the purpose of adjusting the air volume, thereby eliminating the need to manually throw cardboard into the pipe, effectively improving the test accuracy, and eliminating the need to clean the air inlet duct after the test, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the air intake duct of the fan test bench in the prior art;

[0014] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 4 It is a top view of the utility model;

[0017] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure in the AA direction;

[0018] Figure 6 for Figure 5 A partial enlarged view of the middle C area;

[0019] Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure along the BB direction.

[0020] In the figure: 1. first air inlet pipe, 2. second air inlet pipe, 3. valve body, 4. central axis, 5. fixing rod, 6. valve plate, 61. first rotating shaft, 62. second rotating shaft, 7. roller frame, 8. supporting roller, 9. swivel, 91. slide rail, 10. connecting plate, 11. waist-shaped hole, 12. connecting rod, 13. servo motor, 14. bevel gear, 15. bevel gear ring, 16. air uniformity plate, 161. ventilation hole, 1'. air inlet duct, 2'. rectifier grid. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solution of the utility model, the utility model is further described below in conjunction with the accompanying drawings. Obviously, the accompanying drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, without paying any creative work, other embodiments can be obtained based on this drawing and embodiment, which all belong to the protection scope of the utility model.

[0022] according to Figure 1-7 As shown, an air intake duct for a fan test bench includes a first air intake pipe 1 and a second air intake pipe 2, the first air intake pipe 1 and the second air intake pipe 2 are interconnected via an electric regulating valve, the electric regulating valve includes a valve body 3, a plurality of valve plates 6 are movably mounted in the valve body 3, a swivel 9 is rotatably mounted on the outer wall of the valve body 3, the plurality of valve plates 6 are interconnected via the swivel 9, and a servo motor 13 for driving the swivel 9 is also fixedly mounted on the outer wall of the valve body 3.

[0023] In this embodiment, the valve body 3 is a tubular structure corresponding to the first air intake pipe 1 and the second air intake pipe 2, flanges are provided at both ends of the valve body 3, the first air intake pipe 1 and the second air intake pipe 2 are fixedly connected to the valve body 3 by bolts, a central axis 4 is provided at the axis of the valve body 3, fixing rods 5 are welded at both ends of the central axis 4, and the end of the fixing rod 5 away from the central axis 4 is welded to the valve body 3, a plurality of groups of valve plates 6 are distributed in a ring array between the central axis 4 and the valve body 3, the valve plate 6 is a fan-shaped structure, a first rotating shaft 61 is provided at one end of the valve plate 6 close to the central axis 4, and the first rotating shaft 61 is rotatably mounted on the central axis 4, and a second rotating shaft 62 is provided at one end of the valve plate 6 close to the valve body 3, and the second rotating shaft 62 is rotatably mounted on the inner wall of the valve body 3.

[0024] In this embodiment, a plurality of roller frames 7 are arranged in an array on the outer wall of the valve body 3, and support rollers 8 are rotatably mounted on the roller frames 7. A slide rail 91 matching the support rollers 8 is provided on the inner wall of the swivel 9. The slide rail 91 is installed in the groove of the support roller 8. The support rollers 8 support the swivel 9, so that the swivel 9 can rotate around the valve body 3.

[0025] In this embodiment, a connecting plate 10 is welded to the end of the second rotating shaft 62, and a waist-shaped hole 11 is opened on the connecting plate 10. A plurality of connecting rods 12 matching the waist-shaped holes 11 are welded on the outer wall of the rotating ring 9. The connecting rods 12 are inserted into the waist-shaped holes 11. When the rotating ring 9 rotates around the valve body 3, the connecting rods 12 will slide in the waist-shaped holes 11 and drive the connecting plate 10 to rotate, thereby controlling the rotation angle of the valve plate 6.

[0026] In this embodiment, the servo motor 13 is rigidly fixed on the outer wall of the valve body 3 through a motor bracket, a bevel gear 14 is fixedly installed on the power output end of the servo motor 13, and a bevel gear ring 15 meshing with the bevel gear 14 is fixedly installed on the swivel ring 9. The bevel gear 14 is driven to rotate by the servo motor 13, and with the cooperation of the bevel gear 14 and the bevel gear ring 15, the swivel ring 9 rotates around the valve body 3.

[0027] In this embodiment, a uniform air plate 16 is fixedly installed at one end of the second air inlet pipe 2 close to the valve body 3, and a plurality of ventilation holes 161 are opened on the uniform air plate 16. After passing through the valve body 3, the gas enters the second air inlet pipe 2, and the gas is guided by the uniform air plate 16 so that the gas can flow evenly in the second air inlet pipe 2.

[0028] When the utility model is in use, the first air inlet pipe 1 is the air inlet end, and the second air inlet pipe 2 is connected to the fan. When conducting a fan performance experiment, the servo motor 13 drives the swivel 9 to rotate around the valve body 3. When the swivel 9 rotates, the connecting rod 12 drives the connecting plate 10 to rotate, so that each group of valve plates 6 rotates synchronously, thereby achieving the purpose of adjusting the air volume, thereby eliminating the need to manually throw cardboard into the pipeline, effectively improving the test accuracy, and eliminating the need to clean the air inlet duct after the test, thereby improving the test efficiency.

[0029] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An air intake duct for a fan test bench, comprising a first air intake duct (1) and a second air intake duct (2), characterized in that: The first air intake pipe (1) and the second air intake pipe (2) are interconnected via an electric regulating valve, the electric regulating valve comprising a valve body (3), a plurality of groups of valve plates (6) being movably mounted in the valve body (3), a swivel (9) being rotatably mounted on the outer wall of the valve body (3), the plurality of groups of valve plates (6) being interconnected via the swivel (9), and a servo motor (13) for driving the swivel (9) being fixedly mounted on the outer wall of the valve body (3).

2. The air intake duct for a fan test bench according to claim 1, characterized in that: The valve body (3) is a tubular structure corresponding to the first air intake pipe (1) and the second air intake pipe (2); a central axis (4) is provided at the axis center of the valve body (3); fixing rods (5) are fixedly installed at both ends of the central axis (4); the end of the fixing rod (5) away from the central axis (4) is fixedly installed on the valve body (3); a plurality of groups of valve plates (6) are distributed in a ring array between the central axis (4) and the valve body (3); the valve plate (6) is a fan-shaped structure; a first rotating shaft (61) is provided at one end of the valve plate (6) close to the central axis (4); the first rotating shaft (61) is rotatably installed on the central axis (4); a second rotating shaft (62) is provided at one end of the valve plate (6) close to the valve body (3); the second rotating shaft (62) is rotatably installed on the inner wall of the valve body (3).

3. The air intake duct for a fan test bench according to claim 2, characterized in that: A plurality of roller frames (7) are arranged in an array on the outer wall of the valve body (3), support rollers (8) are rotatably mounted on the roller frames (7), and a slide rail (91) matching the support rollers (8) is provided on the inner wall of the rotating ring (9).

4. The air intake duct for a fan test bench according to claim 3, characterized in that: A connecting plate (10) is fixedly mounted on the end of the second rotating shaft (62), and a waist-shaped hole (11) is formed on the connecting plate (10). A plurality of connecting rods (12) matching the waist-shaped holes (11) are fixedly mounted on the outer wall of the rotating ring (9), and the connecting rods (12) are mounted in the waist-shaped holes (11).

5. The air intake duct for a fan test bench according to claim 4, characterized in that: The servo motor (13) is rigidly fixedly mounted on the outer wall of the valve body (3); a bevel gear (14) is fixedly mounted on the power output end of the servo motor (13); and a bevel gear ring (15) meshing with the bevel gear (14) is fixedly mounted on the rotating ring (9).

6. The air intake duct for a fan test bench according to claim 1, characterized in that: An air uniformity plate (16) is fixedly mounted on one end of the second air inlet pipe (2) close to the valve body (3), and a plurality of groups of ventilation holes (161) are provided on the air uniformity plate (16).

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