CN117052706A

CN117052706A - Fan test machine

Info

Publication number: CN117052706A
Application number: CN202311146512.4A
Authority: CN
Inventors: 周爱进; 沈坤华; 宋涛
Original assignee: Jiangsu Fulihua General Equipment Co ltd
Current assignee: Jiangsu Fulihua General Equipment Co ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2023-11-14

Abstract

The application discloses a fan testing machine, and relates to the technical field of axial flow fan noise testing. The fan test machine comprises an installation box, wherein an installation pipe is arranged on the wall surface of the installation box, the installation pipe comprises an installation hole for installing a fan, and the installation hole penetrates through the inside of the installation box; the wall surface of the mounting box is also provided with a plurality of air inlet holes for inlet air into the mounting box, and the mounting box is also provided with an adjusting device for adjusting the air inlet amount and a noise detector for detecting noise. The application is convenient for detecting the running noise condition of the axial flow fan under different air inlet quantity.

Description

Fan test machine

Technical Field

The application relates to the technical field of noise testing of axial flow fans, in particular to a fan testing machine.

Background

The axial flow fan is a fan with the direction of air flow being same as the direction of the fan blade shaft, the axial flow fan is an important structure of the ventilation cooling system, and the performance analysis and the advancement of the fan blade design method are necessary guarantees on the design performance of the ventilation cooling system. The axial flow fans in some civil scenes are particularly required to have certain requirements on noise conditions in the operation process, so that noise tests are required to be carried out when the fans leave the factory, and the noise test contents mainly comprise fan operation noise conditions under different air inlet volumes.

At present, a test machine capable of helping to complete the test is lacking in the market, and part of the test machine has similar functions, so that the test machine is large in size and high in cost and is not convenient for common manufacturers to use.

Disclosure of Invention

In order to facilitate noise testing of a fan, the application provides a fan testing machine.

The application provides a fan test machine which adopts the following technical scheme:

the fan test machine comprises an installation box, wherein an installation pipe is arranged on the wall surface of the installation box, the installation pipe comprises an installation hole for placing a fan inside, and the installation hole penetrates through the inside of the installation box; the wall surface of the mounting box is also provided with a plurality of air inlet holes for inlet air into the mounting box, and the mounting box is also provided with an adjusting device for adjusting the air inlet amount and a noise detector for detecting noise.

By adopting the technical scheme, the fan to be tested can be installed in the installation hole, and then the noise of the fan can be obtained by detecting the noise of the fan by the noise detector; moreover, the size of the air inlet can be adjusted by driving the adjusting device, so that the running noise condition of the fan under different air inlet can be obtained through detection of the noise detector; the application can facilitate the noise test of the fan.

Preferably, the adjusting device comprises an automatic adjusting component for automatically adjusting the air inlet quantity and an emergency sealing component for sealing the air inlet hole under emergency, the automatic adjusting component is arranged on the mounting box, and the emergency sealing component is arranged on the automatic adjusting component.

Through adopting above-mentioned technical scheme, the test requirement of different intake can be satisfied in order to the intake be adjusted to automatically regulated subassembly, and emergency seal subassembly can seal the fresh air inlet when the emergency appears.

Preferably, the automatic adjusting component comprises a fixed plate, the fixed plate is arranged on the mounting box, a driving piece is arranged on the fixed plate, a shielding piece is arranged at the output end of the driving piece, and the driving piece is used for driving the shielding piece to shield an air inlet hole so as to adjust the air inlet quantity.

Through adopting above-mentioned technical scheme, can drive the shielding piece through the drive driving piece and remove to shelter from the fresh air inlet of a certain quantity, adjust the intake consequently.

Preferably, the shielding piece is provided with a plugging groove, and the output end of the driving piece is plugged in the plugging groove; the emergency sealing assembly comprises a locking piece, a connecting hole is formed in the output end of the driving piece, a through butt joint hole is formed in the shielding piece, and the locking piece is jointly arranged in the connecting hole and the butt joint hole in a penetrating mode; the air inlet holes are formed in the side wall of the installation box, and the shielding piece is located above the air inlet holes.

Through adopting above-mentioned technical scheme, when the emergency appears, extract the locking piece from connecting hole and in the butt joint hole can make the shielding piece drop under the effect of self gravity and shelter from a plurality of fresh air inlets.

Preferably, the mounting box comprises a frame part, an air inlet part and a mounting part, wherein the air inlet part is arranged on the side wall of the frame part, the mounting part is arranged at the top end of the frame part, and the mounting hole is formed in the mounting part; the air inlet part and the frame part are detachably connected, and a plurality of air inlet holes are formed in the air inlet part.

Through adopting above-mentioned technical scheme, can dismantle the air inlet portion that has a plurality of fresh air inlets and change other fresh air inlets that have different size fresh air inlets.

Preferably, the mounting portion and the frame portion are detachably connected.

Through adopting above-mentioned technical scheme, can dismantle the installation department that has the mounting hole with the installation department that changes the mounting hole that has other sizes to satisfy the size demand of different fans installation.

Preferably, the top end of the mounting pipe is provided with a flanging.

Through adopting above-mentioned technical scheme, can be convenient for grasp the turn-ups and remove fan testboard to other environment internals test.

Preferably, a plurality of through accommodating holes are sequentially formed in the side wall of the mounting tube from top to bottom, each accommodating hole is internally provided with a connecting rod, the connecting rods are in threaded connection with the accommodating holes, one end, close to the mounting hole, of each connecting rod is provided with a limiting plate for supporting a fan, and the connecting rods are used for driving the limiting plates to move into the mounting holes.

Through adopting above-mentioned technical scheme, can rotate the connecting rod of below earlier and drive the limiting plate and remove into the mounting hole, then place the fan on the limiting plate of below, afterwards rotate the connecting rod of fan top and drive the limiting plate that is located the fan top and get into the mounting hole in spacing to the fan to the assembly and disassembly of fan has been convenient for, has still prevented that the fan from shaking out in the operation process from the mounting hole.

Preferably, the mounting hole is internally and sequentially provided with a damping area and a mounting area from top to bottom, the mounting hole is positioned on the inner wall of the damping area and is provided with a first damping pad, and the limiting plate is positioned on the wall surface of the damping area and is provided with a second damping pad.

By adopting the technical scheme, as the noise of the fan is caused by the excessively high rotating speed or the blade structure on the fan and also caused by vibration in the running process of the fan, the fan can be placed in the vibration reduction area by using the method, and the side wall of the fan is in contact with the first vibration reduction pad or the second vibration reduction pad, so that vibration in the running process of the fan is reduced, and the noise of the fan is eliminated.

Preferably, the inside wall of the installation box is provided with sound absorbing cotton, and the noise detector is arranged at the top end of the installation box.

Through adopting above-mentioned technical scheme, inhale the noise that the fan produced can be absorbed to the sound cotton to can prevent to the noise that sends in the mounting box superposes to noise detector's test department after the reflection, can prevent to detect inaccurately.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the fan to be tested can be installed in the installation hole, and then the noise of the fan can be obtained through detection of the noise detector by driving the fan; moreover, the size of the air inlet can be adjusted by driving the adjusting device, so that the running noise condition of the fan under different air inlet can be obtained through detection of the noise detector;

2. because the noise of the fan is caused by the overhigh rotating speed or the blade structure on the fan, and also caused by vibration in the operation process of the fan, the connecting rod can be rotated to drive the limiting plate to move into the mounting hole to place the fan in the vibration reduction area, and the side wall of the fan is contacted with the first vibration reduction pad or the second vibration reduction pad, so that vibration in the operation process of the fan is reduced, and the noise of the fan is eliminated.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a wind turbine test machine in an embodiment of the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an exploded view for embodying an emergency closure assembly;

FIG. 4 is a cross-sectional view for embodying the internal structure of the mounting hole;

fig. 5 is an air intake 12 for embodying a plurality of air intake holes 3 distributed in an inverted pyramid shape;

FIG. 6 is a schematic structural view of a blower;

fig. 7 is an enlarged view of a portion B in fig. 4.

The reference numerals in the drawings: 1. a mounting box; 11. a frame portion; 12. an air inlet part; 13. a mounting part; 2. installing a pipe; 21. flanging; 22. a mounting hole; 221. a shock absorbing region; 222. a mounting area; 23. a receiving hole; 24. a connecting rod; 25. a limiting plate; 26. a knob; 27. a first shock pad; 28. a second shock pad; 3. an air inlet hole; 4. an adjusting device; 41. an automatic adjustment assembly; 411. a fixing plate; 412. a driving member; 413. a shield; 4131. a plug-in groove; 42. an emergency closure assembly; 43. a locking member; 44. a butt joint hole; 45. a connection hole; 46. a grip; 5. noise detector.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

The embodiment of the application discloses a fan test machine. The device is used for detecting the running noise conditions of the axial flow fan under different air inlet amounts.

Referring to fig. 1, the fan test machine comprises a mounting box 1, wherein a mounting pipe 2 is arranged at the top end of the mounting box 1, a flanging 21 is arranged at the top end of the mounting pipe 2, and the flanging 21 can be grasped to carry the fan test machine; the mounting tube 2 includes an inner mounting hole 22, the mounting hole 22 is used for placing a fan, and the mounting hole 22 penetrates down to the inside of the mounting box 1. The side wall of the installation box 1 is also provided with a plurality of air inlet holes 3 for inlet air into the installation box 1, the plurality of air inlet holes 3 are distributed vertically and horizontally, the installation box 1 is also provided with an adjusting device 4 for adjusting the air inlet quantity and a noise detector 5 for detecting noise, and the noise detector 5 is of the prior art, so that the details are not repeated here.

Referring to fig. 1, in order to prevent noise that the fan sent from getting into the inside back of installation case 1 through reflection stack to the test department of noise detector 5 to lead to noise detector 5 to detect inaccurately, still be equipped with the sound cotton of inhaling that is used for the noise absorption on the installation case 1 inside wall, noise detector 5 is vertical to be located installation case 1 top, thereby noise detector 5 is connected with data acquisition equipment and is convenient for follow-up data statistics.

The fan to be tested can be installed in the installation hole 22, and then the noise of the fan can be obtained by detecting the noise of the fan through the noise detector 5 by driving the fan; in addition, the air inlet quantity can be adjusted by driving the adjusting device 4, so that the running noise condition of the fan under different air inlet quantities can be obtained through detection of the noise detector 5. In addition, it should be noted that: the fan installed in the installation hole 22 is to ensure that the end of the fan close to the inside of the installation box 1 is an air inlet end, and the end of the fan exposed to the external environment is an air outlet end.

Referring to fig. 1 and 2, the adjusting device 4 includes an automatic adjusting unit 41 for automatically adjusting the intake air amount and an emergency closing unit 42 for closing the intake air hole 3 in case of emergency, the automatic adjusting unit 41 is provided on the mounting box 1, and the emergency closing unit 42 is provided on the automatic adjusting unit 41.

Referring to fig. 1 and 2, specifically, the automatic adjusting component 41 includes a fixing plate 411, the fixing plate 411 is disposed on the installation box 1, a driving member 412 is disposed on the fixing plate 411, the driving member 412 is preferably an electric cylinder capable of realizing accurate stroke control, a shielding member 413 is disposed at an output end of the driving member 412, the shielding member 413 is a shielding frame, an inner side wall of the shielding member 413 is attached to an outer side wall of the installation box 1, the shielding member 413 is disposed above a plurality of air inlet holes 3, and the driving member 412 is used for driving the shielding member 413 to move downwards to shield the air inlet holes 3 so as to adjust air inlet quantity.

The shielding piece 413 can be driven to move downwards through the driving piece 412 so as to shield the air inlet holes 3, and particularly, the distance that the shielding piece 413 is driven by the adjusting piece 412 to move is adjusted to adjust the number of the shielded air inlet holes 3, so that the air inlet quantity entering the installation box 1 is adjusted.

Referring to fig. 2 and 3, specifically, the shielding member 413 is provided with a plugging slot 4131, and the output end of the driving member 412 is plugged into the plugging slot 4131; the emergency closing assembly 42 comprises a locking piece 43, the locking piece 43 is a locking column, a connecting hole 45 is formed in the output end of a driving piece 412, a through butt joint hole 44 is formed in a shielding piece 413, the locking piece 43 is jointly arranged in the connecting hole 45 and the butt joint hole 44 in a penetrating mode, and a holding button 46 is further arranged at the end portion of the locking piece 43.

When an emergency situation occurs, for example, sundries are sucked into the installation box 1, the locking of the connecting hole 45 and the butt joint hole 44 can be released by holding the holding button 46 and pulling out the locking piece 43, so that the shielding piece 413 directly falls under the action of gravity, all the air inlet holes 3 are shielded, the inside of the installation box 1 is difficult to be subjected to air inlet, and at the moment, the inside of the installation box 1 is closed, the air suction of the fan into the installation box 1 is difficult to be performed, and the sundries are difficult to reach the blade positions of the fan.

Referring to fig. 4, the mounting box 1 includes a frame portion 11, air inlet portions 12, and mounting portions 13, the air inlet portions 12 are provided in four and are provided on the side walls of the frame portion 11, the mounting portions 13 are provided on the top end of the frame portion 11, and mounting holes 22 are provided on the mounting portions 13. The structure of each air inlet part 12 is the same, the air inlet parts 12 are detachably connected with the frame parts 11, specifically the air inlet parts 12 are arranged on the frame parts 11 through screws, and a plurality of air inlet holes 3 are formed in the air inlet parts 12.

The air inlet part 12 with the air inlet holes 3 can be detached to replace other air inlet parts 12 with the air inlet holes 3 with different sizes so as to facilitate air inlet quantity adjustment. Referring to fig. 4 and 5, in this embodiment, a plurality of air inlet holes 3 are transversely distributed in 9 on one air inlet portion 12, and are longitudinally distributed in 5, so that the driving member 412 drives the shielding member 413 to move for a certain distance to simultaneously shield 36 holes, and in addition, the air inlet portion 12 can be detached and replaced by other air inlet portions 12 with a plurality of air inlet holes 3 distributed in an inverted pyramid shape, thereby obtaining different air inlet volume adjustment.

Referring to fig. 4, the mounting portion 13 and the frame portion 11 are also detachably connected, specifically, the mounting portion 13 is provided on the frame portion 11 by a screw, and the mounting portion 13 with the mounting hole 22 can be detached to replace the mounting portion 13 with the mounting hole 22 with another size, so as to meet the size requirement of different fans for mounting.

Referring to fig. 4, for the purpose of convenient disassembly and replacement of the fan to be detected, a plurality of accommodating holes 23 are sequentially formed in the side wall of the mounting tube 2 from top to bottom, connecting rods 24 are arranged in each accommodating hole 23, the connecting rods 24 are in threaded connection with the accommodating holes 23, a limiting plate 25 for supporting the fan is arranged at one end, close to the mounting hole 22, of each connecting rod 24, a knob 26 is arranged at one end, far away from the mounting hole 22, of each connecting rod 24, and the connecting rods 24 can be driven to rotate by rotating the knob 26, so that the limiting plates 25 are driven to move into the mounting hole 22.

Can rotate the connecting rod 24 of below and drive limiting plate 25 and remove into mounting hole 22, then place the fan on the limiting plate 25 of below, fig. 6 is the schematic diagram that is used for embodying the fan structure, afterwards rotate the connecting rod 24 of fan top and drive the limiting plate 25 that is located the fan top and get into in the mounting hole 22 and carry out spacing to the fan to the installation and removal of fan have been convenient for, still prevented that the fan from shaking out in the mounting hole 22 in the operation process.

It should be noted that: in order to ensure that the whole fan is difficult to shake in the running process of the fan as much as possible, the diameter of the mounting hole 22 is the same as the outer diameter of the fan, and the distance between the adjacent limiting plates 25 in the vertical direction is the same as the length of the fan in the axial direction.

Referring to fig. 7, a shock absorbing region 221 and a mounting region 222 are sequentially formed in the mounting hole 22 from top to bottom, a first shock absorbing pad 27 is disposed on the inner wall of the shock absorbing region 221 of the mounting hole 22, a second shock absorbing pad 28 is disposed on the wall surface of the shock absorbing region 221 of the limiting plate 25, and the first shock absorbing pad 27 and the second shock absorbing pad 28 are preferably rubber foam vibration isolating pads. The fan can be placed in the shock absorbing region 221 such that the fan wall is in contact with the first shock absorbing pad 27 or the second shock absorbing pad 28 to reduce shock during operation of the fan.

Because the noise of the fan is possibly caused by the over-high rotating speed of the fan or the structural shape of blades on the fan, and also possibly caused by vibration generated in the running process due to the problem of dynamic balance of the fan, in order to be able to distinguish whether the noise of the fan is caused by the vibration of the fan, the fan needs to be placed in the damping area 221 so that the wall surface of the fan contacts with the first damping pad 27 and the second damping pad 28 for testing; then, the fan is placed in the installation area 222 for testing again, so as to eliminate the noise of the fan.

The implementation principle of the fan test machine in the embodiment of the application is as follows: firstly, the uppermost connecting rod 24 and the middle connecting rod 24 need to be rotated to drive the corresponding limiting plates 25 to move in the direction away from the mounting holes 22, then the fan to be tested needs to be placed in the mounting holes 22, the bottom end of the fan is supported by the lowermost limiting plates 25, the connecting rod 24 screwed before is reset, and then the noise of the fan can be obtained by driving the fan to be detected by the noise detector 5; in addition, the shielding piece 413 is driven to move downwards to shield the air inlet hole 3 by driving the driving piece 412, so that the air inlet quantity is adjusted, and then the running noise condition of the fan under different air inlet quantities is obtained by detecting through the noise detector 5.

The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A fan test board is characterized in that: the fan-mounted air conditioner comprises a mounting box (1), wherein a mounting pipe (2) is arranged on the wall surface of the mounting box (1), the mounting pipe (2) comprises a mounting hole (22) for placing a fan inside, and the mounting hole (22) penetrates through the inside of the mounting box (1); the wall surface of the installation box (1) is also provided with a plurality of air inlet holes (3) for inlet air into the installation box (1), and the installation box (1) is also provided with an adjusting device (4) for adjusting the air inlet amount and a noise detector (5) for detecting noise.

2. The blower test station of claim 1, wherein: the adjusting device (4) comprises an automatic adjusting component (41) for automatically adjusting the air inlet quantity and an emergency sealing component (42) for sealing the air inlet hole (3) under emergency conditions, the automatic adjusting component (41) is arranged on the mounting box (1), and the emergency sealing component (42) is arranged on the automatic adjusting component (41).

3. The blower test station of claim 2, wherein: the automatic adjusting assembly (41) comprises a fixed plate (411), the fixed plate (411) is arranged on the mounting box (1), a driving piece (412) is arranged on the fixed plate (411), a shielding piece (413) is arranged at the output end of the driving piece (412), and the driving piece (412) is used for driving the shielding piece (413) to shield an air inlet hole (3) so as to adjust the air inlet quantity.

4. A fan testing machine as claimed in claim 3, wherein: the shielding piece (413) is provided with a splicing groove (4131), and the output end of the driving piece (412) is inserted into the splicing groove (4131); the emergency sealing assembly (42) comprises a locking piece (43), a connecting hole (45) is formed in the output end of the driving piece (412), a through butt joint hole (44) is formed in the shielding piece (413), and the locking piece (43) is jointly arranged in the connecting hole (45) and the butt joint hole (44) in a penetrating mode; the air inlet holes (3) are formed in the side wall of the installation box (1), and the shielding piece (413) is located above the air inlet holes (3).

5. The blower test station of claim 1, wherein: the mounting box (1) comprises a frame part (11), an air inlet part (12) and a mounting part (13), wherein the air inlet part (12) is arranged on the side wall of the frame part (11), the mounting part (13) is arranged at the top end of the frame part (11), and the mounting hole (22) is formed in the mounting part (13); the air inlet part (12) is detachably connected with the frame part (11), and a plurality of air inlet holes (3) are formed in the air inlet part (12).

6. The fan testing machine of claim 5, wherein: the mounting part (13) and the frame part (11) are detachably connected.

7. The blower test station of claim 1, wherein: the top end of the mounting tube (2) is provided with a flanging (21).

8. The blower test station of claim 7, wherein: the side wall of the installation pipe (2) is sequentially provided with a plurality of through accommodating holes (23) from top to bottom, each accommodating hole (23) is internally provided with a connecting rod (24), each connecting rod (24) is in threaded connection with the corresponding accommodating hole (23), one end, close to the installation hole (22), of each connecting rod (24) is provided with a limiting plate (25) for supporting a fan, and the connecting rods (24) are used for driving the limiting plates (25) to move into the installation holes (22).

9. The blower test station of claim 8, wherein: the mounting hole (22) is internally and sequentially provided with a damping area (221) and a mounting area (222) from top to bottom, the mounting hole (22) is positioned on the inner wall of the damping area (221) and is provided with a first damping pad (27), and the limiting plate (25) is positioned on the wall surface of the damping area (221) and is provided with a second damping pad (28).

10. The blower test station of claim 1, wherein: the noise detection device is characterized in that sound absorbing cotton is arranged on the inner side wall of the installation box (1), and the noise detector (5) is arranged at the top end of the installation box (1).