Glass fiber reinforced plastic fan blade balance testing device

By designing a support and transfer mechanism, combined with limiting grooves and limiting plates, the problem of inconvenient blade transfer in existing FRP fan blade balancing testing devices has been solved, realizing convenient support and transfer of the blades, and reducing labor intensity and testing costs.

CN223856634UActive Publication Date: 2026-01-30ANHUI CHANGNENG ENERGY SAVING EQUIP CO LTD
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Patent Information

Application Number
CN202520554298.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-27
Publication Date
2026-01-30
Estimated Expiration
2035-03-27

AI Technical Summary

Technical Problem

The existing fiberglass fan blade balancing test device has a single loading seat function, which cannot realize the transfer of fan blades, increasing the labor intensity and testing cost for users.

Method used

A support and transfer mechanism was designed, which combines a limiting groove and a limiting plate, and uses a combination of casters and telescopic rods to achieve the functions of supporting, limiting and transferring the fan blades, reducing manpower input and equipment requirements.

Benefits of technology

It enables convenient transfer and support of the fan blades, reduces labor intensity and testing costs, and improves the practicality of the testing device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of fan blade dynamic balance equipment, and particularly discloses a glass fiber reinforced plastic fan blade balance testing device which comprises a testing device body, the testing device body comprises a bottom plate, the inner side of the bottom plate is provided with a limiting groove, the inner side of the limiting groove is provided with a supporting and transferring mechanism, and the supporting and transferring mechanism comprises a support. The two ends of the lower portion of the support are connected with two first universal wheels and two second universal wheels respectively, the two ends of the upper portion of the support are connected with two symmetrically-arranged first telescopic rods, the telescopic ends of the two first telescopic rods are connected with supporting plates, and the inner sides of the two supporting plates are connected with second telescopic rods. The telescopic ends of the two second telescopic rods are both connected with arc-shaped plates, the sides, close to each other, of the two arc-shaped plates are both detachably connected with arc-shaped elastic pads, the supporting and transferring mechanism for fan blade feeding in the device has the fan blade supporting, limiting and transferring functions, the strength of a user and the investment of carrying equipment are saved, and the practicability of the mechanism is improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a fan blade dynamic balance testing device technology field, specifically discloses a glass steel fan fan blade balance testing device. BACKGROUND

[0002] The glass steel fan refers to the fan made of glass steel material, and the appearance and size are same as the steel fan, but the shell and impeller are all glass steel material, and the main features of the glass steel fan are corrosion resistance, can resist acid and alkali and other harsh environments, and belong to a kind of corrosion-resistant fan, in the process of glass steel fan production, the fan blade is tested for dynamic balance after solidification forming and polishing processing, so that workers can polish and repair the fan blade according to the dynamic balance test results, so that the glass steel fan can keep stable during operation.

[0003] The patent number CN116558714A discloses a glass steel fan fan blade dynamic balance testing device, which comprises a bottom plate, an information acquisition unit and a control display cabinet, a feeding seat is movably arranged on the bottom plate between the shaft body support seat and the alignment seat, the feeding seat comprises a movable bottom block and a clamping frame, one end of the clamping frame is rotatably connected to the movable bottom block, the upper end of the clamping frame is semicircular, and the lower end is provided with a clamping block, the upper end of the alignment seat is provided with a bearing seat, the bearing seat is rotatably connected with an alignment shaft, the right end of the alignment shaft is connected with an alignment disc, a plurality of insertion rods are connected to the alignment disc, the left end of the driving shaft is connected with a fan blade connecting disc, and a positioning plug is arranged on the fan blade connecting disc; the dynamic balance testing device disclosed by the application greatly reduces the labor intensity and feeding operation difficulty of the operator, and when the shaftless glass steel fan fan blade is installed, the fan blade can be quickly installed and disassembled under the premise of ensuring the installation precision of the fan blade, but the feeding seat in the above-mentioned testing device has only a single function, can only limit the fan blade, does not have the function of transporting the fan blade before and after testing, and needs to use additional equipment or manually transport the fan blade by the user, which is not conducive to saving the strength of the user and the cost of fan blade testing, therefore, in order to solve the above-mentioned problems, the utility model provides a glass steel fan fan blade balance testing device. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a glass steel fan fan blade balance testing device, which has the functions of supporting and limiting the fan blade and transporting the fan blade, saves the strength of the user and the investment of the transportation equipment, thereby saving the cost of fan blade testing and improving the practicability of the mechanism.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model provides a glass steel fan blade balance test device, including test device body, the upper side of bottom plate is connected with two first slide rods, the upper side of two first slide rods is slidably connected with alignment seat, the inner side of bottom plate is provided with limiting groove, the open end of limiting groove is provided with limiting plate, the inner side of limiting groove is provided with support transfer mechanism, support transfer mechanism includes support, the both sides of support are provided with sliding slot, the inner side of sliding slot is provided with second slide rod, the lower side both ends of support are connected with two first universal wheel and second universal wheel respectively, the upper side both ends of support are connected with two first telescopic link which are arranged symmetrically, the telescopic end of two first telescopic link is connected with support plate, the inner side of two support plates is connected with second telescopic link, the telescopic end of two second telescopic link is connected with arc plate, the side of two arc plates which is close to each other is detachably connected with arc elastic pad, the both sides of two support plates are provided with blocking rod.

[0007] As a further arrangement of the above scheme, the both sides of the open end of the limiting groove are provided with mounting shafts, the both ends of the limiting plate are penetrated by the mounting shafts, the outer sides of the mounting shafts are threadedly connected with nuts, which facilitates the disassembly and assembly of the limiting plate before and after the blade test, one end of the first slide rod is provided with a slot, the both ends of the second slide rod are respectively provided with a protrusion and a second insertion hole, the protrusion is slidably connected with the slot, which can preliminarily limit the position of the support and the entire support transfer mechanism, the both sides of the bottom plate are symmetrically provided with two first insertion holes, the first insertion hole and the second insertion hole are simultaneously penetrated by a pin shaft and detachably connected with the pin shaft, which facilitates the disassembly and maintenance of the second slide rod.

[0008] As a further arrangement of the above scheme, the both sides of the support plate are connected with side plates, the both sides of the first telescopic rod are provided with first guide rods, the lower ends of the two first guide rods are connected with the support, which facilitates the installation and maintenance of the first guide rod, the first guide rod penetrates the inside of the side plate and is slidably connected with the side plate, which can limit the moving direction of the support plate, the second telescopic rod and the arc plate.

[0009] As a further arrangement of the above scheme, the both sides of the second telescopic rod are provided with second guide rods, one end of each of the two second guide rods is connected with the arc plate, the second guide rods penetrate the inside of the support plate and are slidably connected with the support plate, which can limit the moving direction of the arc plate and the arc elastic pad, so that the two arc plates and the arc elastic pad clamp the blade.

[0010] As a further arrangement of the above-mentioned scheme, the limiting plate is provided with a mounting hole at one end away from the support plate, the two ends of the stop rod on the side close to the support plate are connected with insertion rods, the insertion rods penetrate into the mounting hole and are in sliding fit with the mounting hole, and the outer side of the insertion rod is detachably connected with a limiting ring, which can limit the position of the fan leaf from the two sides of the arc-shaped plate, and help limit the up-down movement of the two support plates during the extension and retraction of the two first telescopic rods, so that the two support plates move up or down at the same time.

[0011] As a further arrangement of the above-mentioned scheme, the first universal wheel and the second universal wheel are respectively in abutment with the groove bottom of the limiting groove and the side of the limiting plate away from the mounting shaft, which can further limit the position of the support and transfer mechanism.

[0012] As a further arrangement of the above-mentioned scheme, the first telescopic rod and the second telescopic rod are connected with a terminal device through electrical signals, which facilitates the user to control the extension and retraction of the first telescopic rod and the second telescopic rod.

[0013] In the utility model, at least one of the two first universal wheels and the second universal wheels is a universal brake wheel.

[0014] The utility model has the following beneficial effects in the process of using:

[0015] The design of the two first universal wheels and the second universal wheels in the support and transfer mechanism facilitates the adjustment of the position of the support and transfer mechanism, so that the support and transfer mechanism can realize the transfer of the fan leaf before and after the test, enrich the function of the support and transfer mechanism, save the strength of the user to carry the fan leaf and the investment of the carrying equipment, the combination of the limiting groove and the limiting plate facilitates the alignment of the support and transfer mechanism with the test device body and the limitation of the position of the support and transfer mechanism, the combination of the sliding groove and the second sliding rod can further limit the position of the support and transfer mechanism.

[0016] The use of the two first telescopic rods can adjust the distance between the support plate, the second telescopic rod and the arc-shaped plate and the support, so as to adjust the height of the fan leaf, the use of the two stop rods can limit the up-down movement of the two support plates, ensure that the two support plates move up or down at the same time, and limit the position of the fan leaf from the two ends of the fan leaf to avoid the fan leaf from falling off the arc-shaped elastic pad.

[0017] The combination of the two second telescopic rods, the arc-shaped plate and the arc-shaped elastic pad can clamp the fan leaf from the two sides of the fan leaf respectively, and make the arc-shaped elastic pad produce reversible deformation, so as to avoid damaging the fan leaf, the detachable connection of the arc-shaped elastic pad and the arc-shaped plate facilitates the user to replace the arc-shaped elastic pad that reaches the elastic pad fatigue value and decreases in elasticity or is damaged, so as to ensure the use effect of the support and transfer mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the present application, and for the person skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 It is a perspective view of the present application;

[0020] Figure 2 It is a perspective view of the combination of the bottom plate and the limiting plate in the present application;

[0021] Figure 3 It is the present application Figure 2 A point in the enlarged view of the present application;

[0022] Figure 4 It is a perspective view of the supporting and transferring mechanism in the present application;

[0023] Figure 5 It is a perspective view of the combination of the bracket and the first telescopic rod and other components in the present application;

[0024] Figure 6 It is an exploded view of the combination of the supporting plate and the blocking rod in the present application;

[0025] Figure 7 It is an exploded view of the combination of the second telescopic rod and the arc-shaped plate in the present application.

[0026] In the figure: 1, test device body; 2, supporting and transferring mechanism; 11, bottom plate; 111, first insertion hole; 112, limiting groove; 12, first sliding rod; 121, insertion slot; 13, alignment seat; 14, mounting shaft; 141, nut; 15, limiting plate; 21, bracket; 211, sliding groove; 212, first guide rod; 213, second sliding rod; 214, protruding block; 215, second insertion hole; 216, pin shaft; 22, first universal wheel; 23, second universal wheel; 24, first telescopic rod; 25, supporting plate; 251, side plate; 252, second guide rod; 253, mounting hole; 26, second telescopic rod; 27, arc-shaped plate; 28, arc-shaped elastic pad; 29, blocking rod; 291, insertion rod; 292, limiting ring. DETAILED DESCRIPTION

[0027] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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 persons skilled in the art without creative efforts should fall within the protection scope of the present application.

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflicts. The present application will be described in detail below with reference to the drawings and in combination with the embodiments. Figures 1-7 The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] The structure, working principle and use method of the test device body in the present application refer to the structure, working principle and use method disclosed in the comparative document CN116558714A.

[0030] The embodiment discloses a glass steel fan blade balance test device, which comprises a test device body 1, the test device body 1 comprises a bottom plate 11, two first sliding rods 12 are symmetrically connected above the bottom plate 11, an alignment seat 13 is slidably connected above the two first sliding rods 12, a limiting groove 112 is arranged on the inner side of the bottom plate 11, a limiting plate 15 is arranged at the open end of the limiting groove 112, a supporting and transferring mechanism 2 is arranged on the inner side of the limiting groove 112, the supporting and transferring mechanism 2 comprises a support 21, sliding grooves 211 are arranged on the two sides of the support 21, second sliding rods 213 are arranged on the inner sides of the sliding grooves 211, first universal wheels 22 and second universal wheels 23 are respectively connected to the two ends below the support 21, first telescopic rods 24 are symmetrically arranged above the two ends of the support 21, supporting plates 25 are connected to the telescopic ends of the two first telescopic rods 24, second telescopic rods 26 are connected to the inner sides of the two supporting plates 25, arc-shaped plates 27 are connected to the telescopic ends of the two second telescopic rods 26, arc-shaped elastic pads 28 are detachably connected to the sides close to each other of the two arc-shaped plates 27, and blocking rods 29 are arranged on the two sides of the two supporting plates 25.

[0031] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the two sides of the open end of the limiting groove 112 are provided with mounting shafts 14, the two mounting shafts 14 penetrate the two ends of the limiting plate 15 respectively, the outer side of the mounting shaft 14 is screw-connected with a nut 141, which facilitates the disassembly and assembly of the limiting plate 15 before and after the test of the fan blade, one end of the first sliding rod 12 is provided with a slot 121, the two ends of the second sliding rod 213 are respectively provided with a protruding block 214 and a second insertion hole 215, the protruding block 214 is in sliding fit with the slot 121, which can preliminarily limit the position of the support 21 and the whole supporting and transporting mechanism 2, the two sides of the bottom plate 11 are symmetrically provided with two first insertion holes 111, the inside of the first insertion hole 111 and the second insertion hole 215 penetrates and is detachably connected with a pin shaft 216, which facilitates the disassembly and maintenance of the second sliding rod 213.

[0032] As shown in Figure 4 and Figure 6 , the two sides of the supporting plate 25 are connected with side plates 251, the two sides of the first telescopic rod 24 are provided with first guide rods 212, the lower ends of the two first guide rods 212 are connected with the support 21, which facilitates the installation and maintenance of the first guide rod 212, the first guide rod 212 penetrates the inside of the side plate 251 and is in sliding connection with the side plate 251, which can limit the moving direction of the supporting plate 25, the second telescopic rod 26 and the arc-shaped plate 27 and other components.

[0033] As shown in Figure 1 , Figure 4 and Figure 7 , the upper and lower sides of the second telescopic rod 26 are provided with second guide rods 252, one end of the two second guide rods 252 is connected with the arc-shaped plate 27, the two second guide rods 252 penetrate the inside of the supporting plate 25 and are in sliding connection with the supporting plate 25, which can limit the moving direction of the arc-shaped plate 27 and the arc-shaped elastic pad 28, so as to clamp the fan blade by the two arc-shaped plates 27 and the arc-shaped elastic pad 28.

[0034] As shown in Figure 4 and Figure 6 , the end of the limiting plate 15 away from the supporting plate 25 is provided with a mounting hole 253, the two ends of the one side of the blocking rod 29 close to the supporting plate 25 are connected with insertion rods 291, the insertion rod 291 penetrates the inside of the mounting hole 253 and is in sliding fit with the mounting hole 253, the outer side of the insertion rod 291 is detachably connected with a limiting ring 292, which can limit the position of the fan blade from the two sides of the arc-shaped plate 27, and at the same time, it is helpful to limit the up and down movement of the two supporting plates 25 during the extension and contraction of the two first telescopic rods 24, so as to ensure that the two supporting plates 25 move upward or downward at the same time.

[0035] As shown in Figure 1As shown, the first universal wheel 22 and the second universal wheel 23 are respectively in contact with the bottom of the limiting groove 112 and the side of the limiting plate 15 away from the mounting shaft 14, which can further limit the position of the support and transfer mechanism 2.

[0036] As shown, the first telescopic rod 24 and the second telescopic rod 26 are connected with the terminal device through electrical signals, which facilitates the user to control the extension and retraction of the first telescopic rod 24 and the second telescopic rod 26. Figure 1 and Figure 4 As shown, the first telescopic rod 24 and the second telescopic rod 26 are connected with the terminal device through electrical signals, which facilitates the user to control the extension and retraction of the first telescopic rod 24 and the second telescopic rod 26.

[0037] The glass fiber reinforced plastic fan blade balance testing device disclosed in the embodiment is used before four limiting rings 292 are sequentially taken off from the outside of four insertion rods 291, the insertion rods 291 are pulled out of the mounting holes 253, and two blocking rods 29 are respectively taken off from the two sides of the support rod and placed aside for standby. The terminal device is used to control the extension and retraction of the two second telescopic rods 26 at the same time, so that the second guide rod 252 slides inside the support plate 25, the distance between the two arc-shaped elastic pads 28 is adjusted, the fan blade to be tested is placed between the two arc-shaped elastic pads 28, the two arc-shaped elastic pads 28 are controlled to move to the two sides of the fan blade at the same time, and when the two arc-shaped elastic pads 28 clamp the fan blade from the two sides of the fan blade, the two second telescopic rods 26 are closed at the same time, the two insertion rods 291 on one side of the same blocking rod 29 are respectively inserted into the two mounting holes 253 on the same side, the connection between the limiting ring 292 and the insertion rod 291 is restored, and the other blocking rod 29 is installed in the same way, so that the two blocking rods 29 limit the position of the fan blade from the two ends of the fan blade.

[0038] Loosen the brake of the universal brake wheel in the first universal wheel 22 and the second universal wheel 23, move the support transfer mechanism 2 together with the fan leaf to the open end of the limiting groove 112, push the support transfer mechanism 2 into the limiting groove 112, make the side of the first universal wheel 22 away from the second universal wheel 23 abut against the groove bottom of the limiting groove 112, step on the brake of the universal brake wheel, pass the two mounting shafts 14 through the two ends of the limiting plate 15 respectively, then screw the nut 141 on the outside of the mounting shaft 14, install the limiting plate 15 at the open end of the limiting groove 112, make the side of the limiting plate 15 close to the second universal wheel 23 abut against each other, insert the two second sliding rods 213 into the two sliding grooves 211 respectively, insert the protruding block 214 into the insertion groove 121, at this time, the two first insertion holes 111 are aligned with the two second insertion holes 215 respectively, insert the two pin shafts 216 into the two second insertion holes 215 respectively to fix the second sliding rod 213, after the fixing is completed, slide the alignment seat 13 on the first sliding rod 12, make the alignment seat 13 and the alignment disc on the upper end of the alignment seat 13 move towards the fan leaf (the detailed structure is shown in the comparative document), use the terminal equipment to control the two first extension rods 24 to extend and retract simultaneously, make the first guide rod 212 slide inside the side plate 251, drive the two support plates 25, the second extension rod 26, the arc-shaped elastic pad 28 and other components to move up and down synchronously, thereby drive the fan leaf to move up and down, until the line connecting the center of the fan leaf with the center of the alignment disc in the alignment seat 13 in the test device body 1 is perpendicular to the surface of the alignment disc close to the fan leaf, close the first extension rod 24, the position of the fan leaf is adjusted, the center of the fan leaf can also be aligned with the alignment seat 13 by independently controlling the extension and retraction of the two second extension rods 26, control the related components in the test device body 1 to connect with the fan leaf to provide support for the fan leaf, use the terminal equipment to control the two second extension rods 26 to retract simultaneously, make the arc-shaped elastic pad 28 separate from the fan leaf, remove the two blocking rods 29 from the two sides of the two support plates 25, then start the related components in the test device body 1 to test the balance of the fan leaf.

[0039] After the test is completed, close the related components in the test device body 1, use the terminal equipment to control the two second extension rods 26 to extend, make the two arc-shaped elastic pads 28 clamp the fan leaf, separate the components in the test device body 1 connected with the fan leaf from the fan leaf, pull out the two pin shafts 216 from the two second insertion holes 215 in sequence, pull out the two second sliding rods 213 from the two sliding grooves 211 in sequence, make the protruding block 214 separate from the insertion groove 121, unscrew the nut 141 from the outside of the mounting shaft 14, remove the limiting plate 15 from the open end of the limiting groove 112, loosen the brake of the universal brake wheel, then move the support transfer mechanism 2 together with the fan leaf whose test is completed to a suitable position, after the fan leaf is removed, fix another fan leaf of the same model between the two arc-shaped elastic pads 28, repeat the above operation to continue the balance test of the fan leaf, when testing multiple fan leaves of the same model, only the position of the support plate 25 needs to be adjusted once.

[0040] The testing device body 1, the bottom plate 11, the first sliding rod 12, the alignment seat 13, the mounting shaft 14, the nut 141, the first guide rod 212, the second sliding rod 213, the pin shaft 216, the first universal wheel 22, the second universal wheel 23, the first telescopic rod 24, the second guide rod 252, the second telescopic rod 26 and the arc-shaped plate 27 and the like components in the glass fiber reinforced plastic fan blade balance testing device disclosed by the utility model are all general standard components or components known by the person skilled in the art, and the structure and principle thereof can be known by the person skilled in the art through a technical manual or through a conventional experimental method.

[0041] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A glass steel fan blade balance testing device, comprising a testing device body, the testing device body comprising a bottom plate, two first slide rods are symmetrically connected above the bottom plate, and an alignment seat is slidably connected above the two first slide rods, characterized in that, The inner side of the bottom plate is provided with a limiting groove, the open end of the limiting groove is provided with a limiting plate, the inner side of the limiting groove is provided with a supporting and transferring mechanism, the supporting and transferring mechanism comprises a support, both sides of the support are provided with sliding grooves, the inner side of the sliding groove is provided with a second sliding rod, the lower ends of the support are respectively connected with two first universal wheels and a second universal wheel, the upper ends of the support are connected with two first telescopic rods which are symmetrically arranged, the telescopic ends of the two first telescopic rods are connected with supporting plates, the inner sides of the two supporting plates are connected with second telescopic rods, the telescopic ends of the two second telescopic rods are connected with arc-shaped plates, the sides of the two arc-shaped plates which are close to each other are detachably connected with arc-shaped elastic pads, and both sides of the two supporting plates are provided with blocking rods.

2. The glass steel fan blade balance testing device according to claim 1, characterized in that, Both sides of the open end of the limiting groove are provided with mounting shafts, the two mounting shafts respectively penetrate through both ends of the limiting plate, the outer side of the mounting shaft is screw-connected with a nut, one end of the first sliding rod is provided with a slot, both ends of the second sliding rod are respectively provided with a protruding block and a second insertion hole, the protruding block is in sliding fit with the slot, both sides of the bottom plate are symmetrically provided with two first insertion holes, the first insertion hole and the second insertion hole are simultaneously provided with a pin shaft penetrating through the inside and being detachably connected with the pin shaft.

3. The glass steel fan blade balance testing device according to claim 1, characterized in that, Both sides of the supporting plate are connected with side plates, both sides of the first telescopic rod are provided with first guide rods, the lower ends of the two first guide rods are connected with the support, and the first guide rod penetrates through the inside of the side plate and is in sliding connection with the side plate.

4. The balance testing device for glass steel fan blade according to claim 1, characterized in that, The upper and lower sides of the second telescopic rod are provided with second guide rods, one end of the two second guide rods is connected with the arc-shaped plate, and the second guide rod penetrates through the inside of the supporting plate and is in sliding connection with the supporting plate.

5. The balance testing device for glass steel fan blade according to claim 3, characterized in that, The end of the limiting plate away from the supporting plate is provided with a mounting hole, both ends of the side of the blocking rod close to the supporting plate are connected with insertion rods, the insertion rod penetrates through the inside of the mounting hole and is in sliding fit with the mounting hole, and the outer side of the insertion rod is detachably connected with a limiting ring.

6. The balance testing device for glass steel fan blade according to claim 1, characterized in that, The sides of the first universal wheel and the second universal wheel away from each other are respectively in abutment with the groove bottom of the limiting groove and the side of the limiting plate away from the mounting shaft.

7. The balance testing device for glass steel fan blade according to claim 1, characterized in that, The first telescopic rod and the second telescopic rod are connected with a terminal device through electrical signals.

Citation Information

Patent Citations

  • Dynamic balance testing device for glass fiber reinforced plastic fan blades

    CN116558714A