A device for testing dynamic balance of a subway air conditioner fan

Abstract

The application discloses a device for testing dynamic balance of a subway air conditioner fan, relates to the technical field of fan dynamic balance detection, and has the advantages of facilitating fine adjustment of the fan, and the technical scheme is as follows: the device comprises a base and two vibration test supports installed on the base, the top ends of the two vibration test supports are jointly provided with an installation platform for placing the fan, and the device is characterized in that two opposite push mechanisms are arranged between the installation platform and the base, the two push mechanisms are respectively connected with push plates, the installation platform is provided with first communication grooves vertically penetrating through the top ends of the corresponding push plates, the top ends of the push plates are provided with a plurality of ball bearings for temporarily supporting the fan, and the push mechanisms are matched with buffer mechanisms, when the push mechanisms drive the push plates to descend, the buffer mechanisms first buffer the falling fan, then descend along with the push mechanisms, and finally are out of contact with the installation platform and the fan.

Description

TECHNICAL FIELD

[0001] The application relates to a fan dynamic balance detection technology field, in particular to a device for testing dynamic balance of a subway air conditioner fan. BACKGROUND

[0002] A centrifugal fan is a driven fluid machine for improving gas pressure and conveying gas, and is widely used in scenes such as ventilation, dust removal and cooling. Vibration generated during fan operation can accelerate component wear and fatigue, and affect equipment reliability, so whole machine dynamic balance testing is required.

[0003] In the whole machine dynamic balance detection of the fan, the fan is installed on an installation platform 12 of the detection device, the installation platform 12 is supported by a vibration test support 11 (such as Figure 10 ), and a vibration sensor is arranged on the vibration test support, and the detection device is provided with a laser rotating speed sensor. When the fan is running, the detection device can complete the whole machine balance state detection by synchronously collecting vibration and rotating speed signals.

[0004] The current testing method usually needs manual hoisting to place the fan on the installation platform, and then fixed by bolts. After placing the fan on the installation platform, if the position of the fan needs to be adjusted, the fan is directly pushed, at this time, due to the large frictional force between the fan and the installation platform, it is not convenient to push the fan for fine adjustment, therefore, the applicant has developed a new technical solution in the actual production process to solve the above technical problems. SUMMARY

[0005] In view of the above technical deficiencies, the purpose of the application is to provide a device for testing dynamic balance of a subway air conditioner fan, which has the advantage of facilitating fine adjustment of the fan.

[0006] To solve the above technical problems, the application adopts the following technical scheme:

[0007] The application provides a device for testing dynamic balance of a subway air conditioner fan, which comprises a base and two vibration test supports mounted on the base, the top ends of the two vibration test supports are jointly provided with an installation platform for placing the fan, two opposite push mechanisms are arranged between the installation platform and the base, and two push plates are respectively connected to the two push mechanisms.

[0008] A first communication groove is formed in the installation platform, the first communication groove is vertically penetrated by the top end of the corresponding push plate, and the top end of the push plate is provided with a plurality of ball bearings for temporarily supporting the fan.

[0009] A buffer mechanism is matched with the push mechanism, when the push mechanism drives the push plate to descend, the buffer mechanism first buffers the falling fan, and then descends with the push mechanism until the buffer mechanism is out of contact with the installation platform and the fan.

[0010] By adopting the technical scheme, the fan is placed on the ball by manual lifting and carrying, and the fan can be easily fine-tuned in a plane by rolling of the ball. After fine-tuning, the push plate is driven to descend by the pushing mechanism, the buffer mechanism first buffers the falling of the fan, reduces the impact damage to the installation platform and the vibration test support, most importantly, after the buffer mechanism and the push plate complete the buffering, they can completely descend and disengage, and do not contact the installation platform and the fan, thereby eliminating any interference (such as additional mass, stiffness, damping influence) of the auxiliary mechanism on the subsequent dynamic balance test, and ensuring the accuracy and reliability of the dynamic balance test data.

[0011] Preferably, the pushing mechanism comprises an inverted U-shaped fixing frame, the base is located on the inner side of the fixing frame and does not contact the fixing frame, a vertical plate is arranged on the fixing frame, and a sliding plate is vertically connected to the vertical plate, the push plate is arranged at the top end of the sliding plate, and a power source for vertically moving the sliding plate is arranged on the fixing frame.

[0012] Preferably, a U-shaped connecting plate is vertically and slidingly connected to the vertical plate, the sliding plate is installed on the inner side of the connecting plate, the power source is used to vertically move the connecting plate, the buffer mechanism comprises a sliding block which is vertically and slidingly connected between the vertical plate and the sliding plate, and the sliding block is located in the connecting plate, a buffer box is arranged on the sliding block, an elastic assembly is arranged in the buffer box to vertically and elastically support a buffer plate, a second communication groove is arranged on the installation platform to allow the top end of the buffer plate to pass through, and a connecting mechanism is arranged on the sliding block. During the descending process of the push plate, when the buffer plate buffers the falling fan through the elastic assembly, the connecting mechanism connects the sliding block and the vertical plate, after the buffering is completed, the connecting mechanism disconnects the sliding block and the vertical plate and connects the sliding block and the sliding plate, so that the buffer box and the buffer plate descend with the sliding plate and disengage from the installation platform and the fan.

[0013] Preferably, the connecting mechanism comprises a sliding groove arranged on the side of the sliding block close to the vertical plate, a clamping plate horizontally and slidingly connected in the sliding groove, a first clamping groove arranged on the vertical plate and matched with the clamping plate, the sliding groove corresponding to the first clamping groove, one end of the clamping plate located in the first clamping groove, and a second clamping groove arranged on the sliding plate and matched with the clamping plate. When the sliding plate descends and the second clamping groove corresponds to the sliding groove, the extrusion mechanism is used to push the clamping plate out of the first clamping groove and push one end of the clamping plate into the second clamping groove.

[0014] When the sliding plate ascends, the sliding plate drives the sliding block to ascend through the clamping plate until the top end of the buffer box contacts the bottom end of the installation platform. At this time, the sliding groove corresponds to the first clamping groove, and the sliding plate continues to ascend. At this time, the groove of the second clamping groove and the inclined surface of the clamping plate are matched, and one end of the clamping plate is pushed back into the first clamping groove.

[0015] Preferably, the extrusion mechanism comprises a horizontal plate arranged on the connecting plate and located on the side of the vertical plate away from the sliding block, the vertical plate is vertically provided with a vertical slot, the vertical slot penetrates the first clamping slot, the horizontal plate is provided with a plug plate located in the vertical slot, the clamping plate has two inclined surfaces, the inclined surface one is arranged upward in the first clamping slot, and the inclined surface two is arranged downward, the inclined surface one is parallel to the inclined surface two, and the bottom end of the plug plate is provided with a right-angled triangular push plate.

[0016] Preferably, when the sliding plate descends to make the push plate contact with the inclined surface one, the tip of the inclined surface two corresponds to the second clamping slot.

[0017] Preferably, the elastic component is a compression spring arranged at the bottom of the buffer box.

[0018] Preferably, the top end surface of the buffer plate is covered with a rubber layer.

[0019] Preferably, the push plate is provided with a groove matched with the ball at the top end, the ball is partially embedded in the groove arranged at the top end of the push plate, and the top of the ball protrudes from the upper surface of the push plate.

[0020] Preferably, the bottom end slot edges of the first and second communication grooves are chamfered edges.

[0021] The present application has the advantages that the ball can be used to finely adjust the fan, the buffer mechanism can buffer the falling of the fan, reduce the impact damage to the installation platform and the vibration test support, and after the buffer mechanism completes the buffering, it can completely separate from the test system, so that it does not participate in the vibration test of the fan, thereby improving the precision of dynamic balance test. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 The structural schematic diagram of the present embodiment is shown in the figure;

[0024] Figure 2 The position distribution schematic diagram of the vertical plate, the sliding block and the sliding plate in the connecting plate is shown in the figure;

[0025] Figure 3 The structural schematic diagram of the present embodiment for embodying the connecting plate is shown in the figure;

[0026] Figure 4 Structure schematic diagram for embodying the pushing plate of the present embodiment;

[0027] Figure 5 Structure schematic diagram for the buffer plate moving under the installation platform;

[0028] Figure 6 Structure schematic diagram for embodying the first clamping slot of the present embodiment;

[0029] Figure 7 Schematic diagram for one end of the inclined surface two on the clamping plate entering the second clamping slot;

[0030] Figure 8 Schematic diagram for the tip of the inclined surface two contacting the second clamping slot when the pushing plate contacts the inclined surface one on the clamping plate;

[0031] Figure 9 Schematic diagram for Figure 2 Enlarged schematic diagram of the structure of A part in the middle;

[0032] Figure 10 Structure schematic diagram of the installation platform and the vibration test support of the existing detection device.

[0033] Explanation of reference signs:

[0034] In the figure: 1, base; 11, vibration test support; 12, installation platform; 121, first communication groove; 122, second communication groove; 13, fan; 14, chamfered edge; 2, fixed frame; 21, vertical plate; 211, first clamping slot; 212, vertical groove; 22, sliding plate; 221, pushing plate; 2211, ball; 2212, groove; 222, second clamping slot; 23, power source; 24, connecting plate; 241, horizontal plate; 2411, plug-in plate; 2412, pushing plate; 25, sliding block; 251, buffer box; 252, buffer plate; 253, sliding groove; 2531, clamping plate; 2532, inclined surface one; 2533, inclined surface two; 254, elastic assembly. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] A device for testing dynamic balance of a subway air conditioner fan, comprising a base 1 and two vibration test supports 11 installed on the base 1, and an installation platform 12 for placing a fan 13 is installed at the top of the two vibration test supports 11, as shown inFigure 1 and Figure 3 and Figure 4 Two opposite pushing mechanisms are arranged between the mounting platform 12 and the base 1, and the two pushing mechanisms are respectively connected with the push plate 221;

[0037] The mounting platform 12 is provided with a first communication groove 121 for vertically passing the top end of the corresponding push plate 221, such as Figure 3 and Figure 4 The top end of the push plate 221 is provided with a plurality of ball bearings 2211 for temporarily supporting the fan 13, and the top end of the push plate 221 is provided with a groove 2212 matched with the ball bearings 2211, the ball bearings 2211 are partially embedded in the groove 2212 formed in the top end of the push plate 221, and the top of the ball bearings 2211 protrudes from the upper surface of the push plate 221;

[0038] The pushing mechanism is matched with a buffer mechanism, when the pushing mechanism drives the push plate 221 to descend, the buffer mechanism first buffers the falling fan 13, and then descends with the pushing mechanism until it is out of contact with the mounting platform 12 and the fan 13.

[0039] As shown in Figure 1 and Figure 3 and Figure 4 The fan 13 is placed on the ball bearings 2211 of the push plate 221 by artificial hoisting, and the rolling of the ball bearings 2211 can easily adjust the fan 13 in plane, after the fine adjustment is completed, the push plate 221 is driven to descend by the pushing mechanism, the buffer mechanism first buffers the falling of the fan 13, reduces the impact damage to the mounting platform 12 and the vibration test support 11, and most importantly, the buffer mechanism and the push plate 221 can completely descend and be out of contact after completing the buffering, and the mounting platform 12 and the fan 13 are no longer in contact, thereby eliminating any interference (such as additional mass, stiffness, damping effect) that the auxiliary mechanism may bring to the subsequent dynamic balance test, and ensuring the accuracy and reliability of the dynamic balance test data.

[0040] As shown in Figure 1 and Figure 2 The pushing mechanism includes an inverted U-shaped fixing frame 2, the base 1 is located on the inner side of the fixing frame 2 and is not in contact with the fixing frame 2, the fixing frame 2 is provided with a vertical plate 21, and the vertical plate 21 is vertically connected with a sliding plate 22, the push plate 221 is arranged at the top end of the sliding plate 22, and the fixing frame 2 is provided with a power source 23 for driving the vertical movement of the sliding plate 22, the sliding plate 22 is driven to move vertically downward by starting the power source 23, at this time, the sliding plate 22 drives the push plate 221 to descend, and the fan 13 on the push plate 221 is placed on the mounting platform 12.

[0041] As shown in Figure 1 and Figure 2 and Figure 3 and Figure 4The vertical plate 21 is vertically slidably connected with a U-shaped connecting plate 24, the sliding plate 22 is installed on the inner side of the connecting plate 24, and the power source 23 is used for pushing the connecting plate 24 to vertically move; the buffer mechanism comprises a sliding block 25 which is vertically slidably connected between the vertical plate 21 and the sliding plate 22, and the sliding block 25 is located in the connecting plate 24; the sliding block 25 is provided with a buffer box 251, the buffer plate 252 is vertically and elastically supported in the buffer box 251 by an elastic assembly 254, the second communication groove 122 is formed in the installation platform 12 and used for allowing the top end of the buffer plate 252 to pass through, the sliding block 25 is provided with a connecting mechanism, when the buffer plate 252 buffers the falling fan 13 by the elastic assembly 254 during the descending process of the push plate 221, the connecting mechanism connects the sliding block 25 with the vertical plate 21, after the buffering is completed, the connecting mechanism disconnects the sliding block 25 from the vertical plate 21 and connects the sliding block 25 with the sliding plate 22, so that the buffer box 251 and the buffer plate 252 descend with the sliding plate 22 and are out of contact with the installation platform 12 and the fan 13, and the elastic assembly 254 is a compression spring arranged at the bottom of the buffer box 251.

[0042] As Figure 1 and Figure 2 and Figure 3 and Figure 4 When the power source 23 is started, the connecting plate 24 is driven to vertically descend, the connecting plate 24 drives the sliding plate 22 and the push plate 221 on the inner side of the connecting plate 24 to synchronously descend, and the fan 13 descends at the same time; during this descending stage, the connecting mechanism keeps the sliding block 25 connected with the vertical plate 21, so that the sliding block 25, the buffer box 251 and the buffer plate 252 are static (as shown in Figure 8 When the bottom surface of the fan 13 contacts the buffer plate 252, the fan 13 will extrude the buffer plate 252 downwards until the fan 13 contacts the installation platform 12, and in this process, the buffer plate 252 extrudes the elastic assembly 254 to be compressed, so that the buffering of the falling fan 13 is completed; after the buffering is completed, the connecting mechanism disconnects the sliding block 25 from the vertical plate 21, and then the connection between the sliding block 25 and the sliding plate 22 is established; thereafter, the sliding block 25 and the buffer box 251 and the buffer plate 252 installed thereon are integrated with the sliding plate 22 and continue to synchronously descend with the sliding plate 22 until the top end of the buffer plate 252 is completely lowered below the installation platform 12 (as shown in Figure 5 and Figure 6 and Figure 7 ), so that the whole buffer mechanism is completely physically separated from the installation platform 12 and the fan 13, and the subsequent dynamic balance test is ensured not to be disturbed;

[0043] When the top end of the buffer plate 252 is completely lowered below the installation platform 12, the compressed elastic assembly 254 (compression spring) automatically recovers to a natural state.

[0044] As Figure 3 and Figure 4The connecting mechanism comprises a sliding groove 253 provided on the side of the sliding block 25 close to the vertical plate 21 and a pressing mechanism provided on the connecting plate 24, the sliding groove 253 is horizontally slidably connected with a clamping plate 2531, the vertical plate 21 is provided with a first clamping groove 211 matched with the clamping plate 2531, the sliding groove 253 corresponds to the first clamping groove 211, one end of the clamping plate 2531 is located in the first clamping groove 211, the sliding plate 22 is provided with a second clamping groove 222 matched with the clamping plate 2531, when the sliding plate 22 is lowered and the second clamping groove 222 corresponds to the sliding groove 253, the pressing mechanism is used for pushing the clamping plate 2531 out of the first clamping groove 211 and pushing one end of the clamping plate 2531 into the second clamping groove 222;

[0045] When the sliding plate 22 is raised, the sliding plate 22 drives the sliding block 25 to rise through the clamping plate 2531 until the top end of the buffer box 251 contacts the bottom end of the mounting platform 12, at this time, the sliding groove 253 corresponds to the first clamping groove 211, the sliding plate 22 continues to rise, at this time, the notch of the second clamping groove 222 cooperates with the inclined surface two 2533 of the clamping plate 2531 to push the one end of the clamping plate 2531 back into the first clamping groove 211, the pressing mechanism comprises a horizontal plate 241 provided on the connecting plate 24, and the horizontal plate 241 is located on the side of the vertical plate 21 away from the sliding block 25, the vertical plate 21 is vertically provided with a vertical groove 212 penetrating through the first clamping groove 211, the horizontal plate 241 is provided with an insertion plate 2411 located in the vertical groove 212, the clamping plate 2531 has two inclined surfaces, the inclined surface one 2532 is upwardly provided in the first clamping groove 211, and the inclined surface two 2533 is downwardly provided, the inclined surface one 2532 is parallel to the inclined surface two 2533, the bottom end of the insertion plate 2411 is provided with a push plate 2412 in the shape of a right triangle, when the sliding plate 22 is lowered to correspond to the second clamping groove 222 and the sliding groove 253, the push plate 2412 cooperates with the inclined surface one 2532 to push the clamping plate 2531 out of the first clamping groove 211 and push the one end of the inclined surface two 2533 of the clamping plate 2531 into the second clamping groove 222.

[0046] As Figure 1 and Figure 3 and Figure 4 The working process of the connecting mechanism is an automatic cycle based on mechanical linkage, when the sliding plate 22 is driven to fall, the push plate 221 and the fan 13 are also caused to fall, at this time, one end of the clamping plate 2531 is located in the first clamping groove 211 of the vertical plate 21, so that the sliding block 25 and the buffer mechanism remain stationary, the fan 13 presses the buffer plate 252 to complete the buffering through the elastic assembly 254 and places the buffer plate 252 on the mounting platform 12, when the sliding plate 22 is lowered to correspond to the second clamping groove 222 and the sliding groove 253 on the sliding block 25, the pressing mechanism fixed on the connecting plate 24 is also lowered synchronously, the push plate 2412 thereof contacts the upward inclined surface one 2532 of the clamping plate 2531 (as Figure 8), the inclined surface of the clamping plate 2531 is used to push the clamping plate 2531 horizontally out of the first clamping groove 211, and the end of the clamping plate 2531 with the downward inclined surface two 2533 is inserted into the second clamping groove 222 of the sliding plate 22, so as to connect the sliding block 25 and the sliding plate 22 (as shown in Figure 7 After that, the sliding block 25, the buffer box 251 and the buffer plate 252 continue to descend synchronously with the sliding plate 22, and are completely separated from the installation platform 12. When the buffer plate 252 is completely separated from the installation platform 12, the push plate 221 is also completely separated from the installation platform 12.

[0047] When the sliding plate 22 rises, as shown in Figure 7 The sliding block 25 and the buffer mechanism are driven by the clamping plate 2531 to rise together until the top of the buffer box 251 contacts the bottom surface of the installation platform 12 and stops (as shown in Figure 2 At this time, the sliding groove 253 of the sliding block 25 and the first clamping groove 211 of the vertical plate 21 are aligned again, and then the sliding plate 22 continues to rise, and the lower edge groove of the second clamping groove 222 contacts the downward inclined surface two 2533 of the clamping plate 2531. The clamping plate 2531 is pushed horizontally out of the second clamping groove 222 by the inclined surface, so that one end of the clamping plate 2531 reenters the first clamping groove 211, and the sliding block 25 is reconnected with the vertical plate 21 (as shown in Figure 4 At this time, the top end of the buffer plate 252 passes through the second communication groove 122, and the top end of the push plate 221 passes through the first communication groove 121, and the whole mechanism returns to the initial preparation state.

[0048] As shown in Figure 3 and Figure 4 The width of the vertical groove 212 is smaller than the width of the clamping plate 2531, so the clamping plate 2531 can only enter the first clamping groove 211 and the second clamping groove 222, and cannot enter the vertical groove 212.

[0049] As shown in Figure 8 When the sliding plate 22 descends and the push plate 2412 contacts the inclined surface one 2532, the tip of the inclined surface two 2533 corresponds to the second clamping groove 222. At this time, the tip of the inclined surface two 2533 corresponds to the second clamping groove 222, which reduces the interference, rigid collision and friction between the clamping plate 2531 and the sliding plate 22 during the process of pushing the clamping plate 2531, thereby avoiding the situation of being stuck.

[0050] As shown in Figure 1 The top surface of the buffer plate 252 is covered with a rubber layer (not shown in the figure), which reduces the hard scraping or knocking between the bottom of the fan 13 and the buffer plate 252.

[0051] As shown in Figure 9The bottom end slot edge of the first communication groove 121 and the second communication groove 122 is a chamfer edge 14. The chamfer edge 14 is arranged to facilitate the buffer plate 252 and the top end of the push plate 221 to be introduced and pass through the second communication groove 122 and the first communication groove 121 respectively, thereby reducing the risk of jamming.

[0052] The working process of the device is as follows:

[0053] First step: initial feeding and plane position fine adjustment

[0054] The operator hoists the fan 13 to be tested onto the ball bearings 2211 of the push plates 221 on both sides. The fan 13 is supported by the ball bearings 2211, and the operator can easily push the fan 13 to adjust the plane position above the mounting platform 12. During this process, the fan 13 does not directly contact the surface of the mounting platform 12, thereby reducing wear and tear.

[0055] Second step: placing the buffer

[0056] After the fan 13 is adjusted to the desired position, the connecting plate 24, the sliding plate 22 and the push plate 221 are slowly lowered by the power source 23. At this time, the sliding block 25 remains stationary because it is connected to the vertical plate 21 by the clamping plate 2531. The push plate 221 is lowered, which simultaneously causes the fan 13 to fall. The bottom surface of the fan 13 first contacts the buffer plate 252 and gradually compresses the elastic assembly 254 below it. The fan 13 eventually contacts the mounting platform 12. During this process, the fan 13 is buffered by the buffer plate 252 and the elastic assembly 254.

[0057] Third step: connection switching and disengaging contact

[0058] When the sliding plate 22 is lowered to a specific position along with the connecting plate 24, the push assembly (the push plate 2412 at the bottom end) fixed to the connecting plate 24 contacts the upward inclined surface one 2532 of the clamping plate 2531. At this time, the tip of the inclined surface two 2533 of the clamping plate 2531 corresponds to the second clamping groove 222 on the sliding plate 22. Then, the connecting plate 24 continues to descend, and the push plate 2412 horizontally pushes the clamping plate 2531 out of the first clamping groove 211 and pushes the end with the downward inclined surface two 2533 into the second clamping groove 222 of the sliding plate 22. Until the clamping plate 2531 is separated from the first clamping groove 211, the connection between the sliding block 25 and the sliding plate 22 is established. The power source 23 continues to drive the connecting plate 24 and the sliding plate 22 to descend. The sliding block 25, the buffer box 251 and the buffer plate 252 then descend as a whole. When the top end of the buffer plate 252 is completely lowered below the mounting platform 12, the fan 13 is completely supported by the mounting platform 12. The mounting platform 12 does not contact the buffer mechanism and the push plate 221, and does not have any additional impact on subsequent high-precision vibration tests.

[0059] Fourth step: final fixation and test

[0060] The installed fan 13 is fastened on the installation platform 12 by clamps such as bolts, then the fan 13 is started and the whole machine dynamic balance test is carried out.

[0061] Fifth step: reset (after the test is completed)

[0062] After the test is completed and the fan 13 is disassembled, the power source 23 drives the connecting plate 24, the slide plate 22 and the like to rise, the slide plate 22 drives the slide block 25 and the buffer mechanism to rise together, when the top end of the buffer box 251 contacts the bottom surface of the installation platform 12, the slide block 25 stops rising, at this time, the slide groove 253 of the slide block 25 is re-aligned with the first clamping groove 211 of the vertical plate 21, the slide plate 22 continues to rise, the lower edge groove of the second clamping groove 222 contacts the downward inclined surface two 2533 of the clamping plate 2531, the clamping plate 2531 is horizontally pushed back into the first clamping groove 211 from the second clamping groove 222 by the action of the inclined surface, the device returns to the first step state, and waits for the next working cycle.

[0063] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. A device for testing dynamic balance of a subway air conditioner fan, comprising a base (1) and two vibration test supports (11) installed on the base (1), and a mounting platform (12) for placing a fan (13) is installed at the top of the two vibration test supports (11), characterized in that, Two opposite push mechanisms are arranged between the mounting platform (12) and the base (1), and push plates (221) are respectively connected to the two push mechanisms; A first communication groove (121) is formed in the mounting platform (12) and vertically penetrates the top end of the corresponding push plate (221), and a plurality of ball bearings (2211) are arranged on the top end of the push plate (221) to temporarily support the fan (13); A buffer mechanism is arranged on the push mechanism, and when the push mechanism drives the push plate (221) to descend, the buffer mechanism first buffers the falling fan (13), and then descends with the push mechanism until the buffer mechanism is separated from the mounting platform (12) and the fan (13); The push mechanism comprises an inverted U-shaped fixing frame (2), the base (1) is located on the inner side of the fixing frame (2) and is not in contact with the fixing frame (2), a vertical plate (21) is arranged on the fixing frame (2), a sliding plate (22) is vertically connected to the vertical plate (21), the push plate (221) is arranged on the top end of the sliding plate (22), and a power source (23) is arranged on the fixing frame (2) to vertically drive the sliding plate (22) to move; A U-shaped connecting plate (24) is vertically and slidably connected to the vertical plate (21), the sliding plate (22) is arranged on the inner side of the connecting plate (24), the power source (23) is used to vertically drive the connecting plate (24) to move, the buffer mechanism comprises a sliding block (25) which is vertically and slidably connected between the vertical plate (21) and the sliding plate (22) and is located in the connecting plate (24), a buffer box (251) is arranged on the sliding block (25), a buffer plate (252) is vertically and elastically supported in the buffer box (251) by an elastic assembly (254), a second communication groove (122) is formed in the mounting platform (12) and penetrates the top end of the buffer plate (252), a connecting mechanism is arranged on the sliding block (25), during the descending process of the push plate (221), when the buffer plate (252) buffers the falling fan (13) by the elastic assembly (254), the connecting mechanism connects the sliding block (25) and the vertical plate (21), after the buffering is completed, the connecting mechanism disconnects the sliding block (25) and the vertical plate (21) and connects the sliding block (25) and the sliding plate (22), so that the buffer box (251) and the buffer plate (252) descend with the sliding plate (22) and are separated from the mounting platform (12) and the fan (13).

2. The device for testing dynamic balance of a fan of a subway air conditioner according to claim 1, wherein The connecting mechanism comprises a sliding groove (253) formed on the side of the sliding block (25) close to the vertical plate (21) and a pressing mechanism arranged on the connecting plate (24), a clamping plate (2531) is horizontally slidably connected in the sliding groove (253), the vertical plate (21) is provided with a first clamping groove (211) matched with the clamping plate (2531), the sliding groove (253) corresponds to the first clamping groove (211), one end of the clamping plate (2531) is located in the first clamping groove (211), the sliding plate (22) is provided with a second clamping groove (222) matched with the clamping plate (2531), when the sliding plate (22) is lowered and the second clamping groove (222) corresponds to the sliding groove (253), the pressing mechanism is used for pushing the clamping plate (2531) out of the first clamping groove (211) and pushing one end of the clamping plate (2531) into the second clamping groove (222). When the sliding plate (22) is raised, the sliding plate (22) drives the sliding block (25) to rise through the clamping plate (2531) until the top end of the buffer box (251) contacts the bottom end of the mounting platform (12), at this time, the sliding groove (253) corresponds to the first clamping groove (211), the sliding plate (22) continues to rise, at this time, the notch of the second clamping groove (222) is matched with the inclined surface two (2533) of the clamping plate (2531), and one end of the clamping plate (2531) is pushed back into the first clamping groove (211).

3. The device for testing dynamic balance of a fan of a subway air conditioner according to claim 2, wherein The pressing mechanism comprises a horizontal plate (241) arranged on the connecting plate (24), and the horizontal plate (241) is located on the side of the vertical plate (21) away from the sliding block (25), the vertical plate (21) is vertically provided with a vertical groove (212) penetrating through the first clamping groove (211), and the horizontal plate (241) is provided with an insertion plate (2411) located in the vertical groove (212), the clamping plate (2531) has two inclined surfaces, the inclined surface one (2532) is arranged upward in the first clamping groove (211), and the inclined surface two (2533) is arranged downward, the inclined surface one (2532) is parallel to the inclined surface two (2533), and the bottom end of the insertion plate (2411) is provided with a right-angled triangular push plate (2412), when the sliding plate (22) is lowered to the second clamping groove (222) corresponding to the sliding groove (253), the push plate (2412) is matched with the inclined surface one (2532) to push the clamping plate (2531) out of the first clamping groove (211) and push one end of the inclined surface two (2533) of the clamping plate (2531) into the second clamping groove (222).

4. The device for testing dynamic balance of a fan of a subway air conditioner according to claim 3, wherein When the sliding plate (22) is lowered and the push plate (2412) contacts the inclined surface one (2532), the tip of the inclined surface two (2533) corresponds to the second clamping groove (222).

5. The device for testing dynamic balance of a fan of a subway air conditioner according to claim 1, wherein The elastic component (254) is a compression spring arranged at the bottom of the buffer box (251).

6. The device for testing dynamic balance of a fan of a subway air conditioner according to claim 1, wherein The top end surface of the buffer plate (252) is covered with a rubber layer.

7. The device for testing dynamic balance of a fan of a subway air conditioner according to claim 1, wherein The top end of the push plate (221) is provided with a groove (2212) matched with a ball (2211), the ball (2211) is partially embedded in the groove (2212) at the top end of the push plate (221), and the top of the ball (2211) protrudes from the upper surface of the push plate (221).

8. The device for testing dynamic balance of a fan of a subway air conditioner according to claim 1, wherein The bottom end of the first communication groove (121) and the second communication groove (122) is provided with a chamfered edge (14).

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