A dynamic balance detection device for contra-rotating axial flow fan impellers

Abstract

The utility model relates to a kind of dynamic balance detection devices of counter-rotating axial flow fan impeller, including dynamic balance detection machine, left and right two groups of longitudinal supporting seat are equipped on dynamic balance detection machine, supporting seat includes the base of sliding connection on dynamic balance detection machine, the front, rear side of base is respectively fixed with vertical riser, the two sides of it respectively abut with lifting apron, the middle part of lifting apron is equipped with two groups of front, rear distribution's supporting wheel, supporting wheel is inserted with wheel shaft, the both ends of wheel shaft are respectively inserted and fixed on lifting apron;Lifting apron and base are equipped with longitudinal X-shaped support between, X-shaped support includes obliquely placed left connecting rod and right connecting rod, the middle part of left connecting rod and right connecting rod is hinged together by pin shaft.This dynamic balance detection device's supporting seat is equipped with mechanism of synchronous adjustment supporting wheel height, based on its mechanism, the adjustment of its supporting wheel height is conveniently realized;It is synchronous adjustment while using, can avoid artificial adjustment error, guarantee the height of supporting wheel on two groups of supporting seat is consistent.

Description

Technical Field

[0001] This utility model relates to the technical field of dynamic balancing testing machines, and more specifically to a dynamic balancing testing device for a counter-rotating axial flow fan impeller. Background Technology

[0002] A dynamic balancing testing machine is a precision device used to detect the dynamic imbalance of rotating mechanical components (such as rotors, tires, impellers, etc.). By measuring vibration signals during rotation, it analyzes the differences in centrifugal force caused by uneven mass distribution, guiding corrections to reduce vibration and noise and extend equipment life. For example, the impeller of a counter-rotating axial flow fan undergoes dynamic balancing testing and pin testing during manufacturing. The impeller is typically mounted on a central shaft, which rests on two sets of adjustable supports. The central shaft is then driven to rotate for testing. The adjustment of the supports includes height and level adjustment of the central shaft support components. Regarding the height adjustment of the support components, both sets of supports generally have independent adjustment mechanisms. For a central shaft with the same diameter at both ends, the heights of the two sets of support components must be consistent. Therefore, some have proposed whether adjusting only one set of adjustment mechanisms can achieve synchronous upgrading of both sets of support components, which is convenient for adjustment and improves accuracy. Thus, the aforementioned structure needs to be designed on the support supports. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a dynamic balancing testing device for the impeller of a counter-rotating axial flow fan. The support of the dynamic balancing testing device is equipped with a mechanism for synchronously adjusting the height of the support rollers, which facilitates the adjustment of the height of the support rollers.

[0004] A dynamic balancing testing device for a counter-rotating axial flow fan impeller includes a dynamic balancing testing machine. The dynamic balancing testing machine is provided with two sets of longitudinal support supports, one on the left and one on the right. Each support support includes a base slidably connected to the dynamic balancing testing machine. Vertical plates are fixed to the front and rear sides of the base, and lifting plates are abutted against the sides of the base. Two sets of front and rear distributed support rollers are provided in the middle of the lifting plates. Axles are inserted into the support rollers, and the two ends of the axles are respectively inserted and fixed to the lifting plates. A longitudinal X-shaped bracket is provided between the lifting plates and the base. The X-shaped bracket includes a left connecting rod and a right connecting rod placed at an angle. The middle parts of the left connecting rod and the right connecting rod are hinged together by a pin. The upper ends of the left connecting rod and the right connecting rod are respectively inserted between the lifting plates and fixed with transverse guide columns. The lower parts of the front and rear sides of the lifting plates are respectively formed with longitudinal horizontal guide grooves, and the two ends of the guide columns are respectively inserted into the guide grooves of the lifting plates.

[0005] Two sets of front and rear sliding blocks are abutted against the base on one side of the upright plate. Horizontal support shafts are formed on the sliding blocks, and these support shafts are respectively inserted into the lower ends of the left and right connecting rods. A longitudinal lead screw is screwed onto each sliding block. The lead screw consists of two sets of rear and front lead screws with opposite helical directions. Both ends of the lead screw are pivotally connected to end seats, which are fixed to the front and rear ends of the base. A crank is fixedly connected to the front end of the lead screw through the end seat sleeve, and a transmission gear is fixedly connected to the rear end of the lead screw through the end seat sleeve. An idler gear meshes with the transmission gear and is hinged to the base via a connecting shaft. One side of the idler gear extends beyond the inner end face of the base. A connecting block extending towards the inner end face of the base is formed on the end seat on the rear side of the base. A vertical dovetail groove is formed on the connecting block, and a snap-fit ​​block is inserted into the dovetail groove. The snap-fit ​​block consists of two dovetail-shaped connecting blocks, one on the left and one on the right.

[0006] Preferably, the upright plate has a vertical height adjustment groove, and a horizontal locking bolt is inserted into the height adjustment groove. The locking bolt is inserted and fixed to the lifting support plate, and the end of the locking bolt extends out of the lifting support plate and is screwed and fixed with a locking nut.

[0007] Preferably, the front and rear parts of the lead screw are respectively fitted with limiting sleeves, and the limiting sleeves abut against the opposite end faces of the base.

[0008] Preferably, the diameter of the guide column on the X-shaped bracket is equal to the width of the guide groove on the lifting plate;

[0009] The guide groove is located on the lower side of the support roller, and the upper end of the support roller extends out of the upper end face of the lifting plate.

[0010] Preferably, the distance between the two sets of lifting plates is equal to the sum of the thicknesses of the left and right connecting rods, and the thickness of the left connecting rod is equal to the thickness of the right connecting rod.

[0011] One side of the left connecting rod and the right connecting rod abuts against the inner wall of the lifting platform, and a spacer is provided on the inner wall of the other side of the lifting platform and the left or right connecting rod, and the spacer is fitted onto the guide column.

[0012] Preferably, the two sets of supporting supports move closer to each other until the connecting blocks abut together, and the connecting blocks on both sides of the snap-fit ​​block are respectively inserted into the dovetail grooves of the two sets of connecting blocks;

[0013] The idler wheels on the two sets of support seats mesh together.

[0014] The beneficial effects of this utility model are as follows:

[0015] The support of this dynamic balancing testing device is equipped with a mechanism for synchronously adjusting the height of the support rollers. This mechanism facilitates the adjustment of the support roller height; at the same time, the synchronous adjustment avoids human adjustment errors and ensures that the height of the support rollers on the two sets of support supports is consistent. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a top view of the structure of this utility model;

[0018] Figure 3 This is a top view of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the two sets of support brackets connected by this utility model.

[0020] In the diagram: 10. Support bracket; 1. Base; 2. Vertical plate; 21. Height adjustment groove; 3. Lifting support plate; 31. Guide groove; 4. Support roller; 5. X-shaped bracket; 51. Left connecting rod; 52. Right connecting rod; 53. Pin shaft; 54. Guide column; 6. Sliding block; 61. Support shaft; 7. Lead screw; 71. Rear lead screw; 72. Front lead screw; 8. End seat; 81. Connecting block; 82. Dovetail groove; 9. Hand crank; 11. Transmission gear; 12. Idler wheel; 13. Connecting shaft; 14. Locking bolt; 15. Locking nut; 16. Snap-fit ​​block. Detailed Implementation

[0021] Example: See Figures 1 to 4 As shown, a dynamic balancing testing device for a counter-rotating axial flow fan impeller includes a dynamic balancing testing machine. The dynamic balancing testing machine has two sets of longitudinal support supports 10, one on the left and one on the right. Each support support 10 includes a base 1 slidably connected to the dynamic balancing testing machine. Vertical plates 2 are fixed to the front and rear sides of the base 1, and lifting plates 3 abut against both sides. Two sets of front- and rear-distributed support rollers 4 are provided in the middle of the lifting plate 3. Axles are inserted into the support rollers 4, and both ends of the axles are fixed to the lifting plate 3. A longitudinal X-shaped bracket 5 is provided between the lifting pallet 3 and the base 1. The X-shaped bracket 5 includes an inclined left connecting rod 51 and a right connecting rod 52. The middle parts of the left connecting rod 51 and the right connecting rod 52 are hinged together by a pin 53. The upper ends of the left connecting rod 51 and the right connecting rod 52 are respectively inserted between the lifting pallets 3 and a transverse guide post 54 is inserted and fixed. The lower parts of the front and rear sides of the lifting pallet 3 are respectively formed with longitudinal horizontal guide grooves 31. The two ends of the guide post 54 are respectively inserted into the guide grooves 31 of the lifting pallet 3.

[0022] Two sets of front-to-back sliding blocks 6 are abutted against the base 1 on one side of the upright plate 2. A transverse support shaft 61 is formed on each sliding block 6, and the support shaft 61 is respectively inserted into the lower ends of the left connecting rod 51 and the right connecting rod 52. A longitudinal lead screw 7 is screwed onto each sliding block 6. The lead screw 7 consists of two sets of rear lead screws 71 and front lead screws 72 with opposite helical directions. Both ends of the lead screw 7 are pivotally connected to end seats 8, which are fixed to the front and rear ends of the base 1. The front end of the lead screw 7 extends out of the end seat 8 and is inserted into a rocker arm for fixed connection. Hand 9, rear end seat 8 is fitted with a transmission gear 11, the transmission gear 11 is meshed with an idler gear 12, the idler gear 12 is hinged to the base 1 through a connecting shaft 13, one side of the idler gear 12 extends out of the inner end face of the base 1; the end seat 8 on the rear side of the base 1 is formed with a connecting block 81 extending towards the inner end face of the base 1, the connecting block 81 is formed with a vertical dovetail groove 82, a snap-fit ​​block 16 is inserted into the dovetail groove 82, the snap-fit ​​block 16 is composed of two dovetail-shaped connecting blocks on the left and right.

[0023] The upright plate 2 has a vertical height adjustment groove 21 formed on it. A horizontal locking bolt 14 is inserted into the height adjustment groove 21. The locking bolt 14 is inserted and fixed on the lifting support plate 3. The end of the locking bolt 14 extends out of the lifting support plate 3 and is screwed and fixed with a locking nut 15. Based on the locking bolt 14, the upright plate 2 can only move up and down on the lifting support plate 3. At the same time, it is tightened by the locking nut 15 after the height of the lifting support plate 3 is adjusted, so as to achieve reinforcement.

[0024] The front and rear parts of the lead screw 7 are respectively fitted with limiting sleeves, which abut against the opposite end faces of the base 1. The limiting sleeves can restrict the axial movement of the lead screw 7.

[0025] The diameter of the guide post 54 on the X-shaped bracket 5 is equal to the width of the guide groove 31 on the lifting plate 3; the guide groove 31 is located on the lower side of the support roller 4, and the upper end of the support roller 4 extends out of the upper end face of the lifting plate 3, so the support roller 4 will not interfere with the X-shaped bracket 5.

[0026] The distance between the two sets of lifting plates 3 is equal to the sum of the thicknesses of the left connecting rod 51 and the right connecting rod 52, and the thickness of the left connecting rod 51 is equal to the thickness of the right connecting rod 52.

[0027] One side of the left connecting rod 51 and the right connecting rod 52 respectively abuts against the inner wall of the lifting plate 3, and a spacer is provided on the inner wall of the other side of the lifting plate 3 and the left connecting rod 51 or the right connecting rod 52. The spacer is fitted onto the guide post 54.

[0028] See Figure 4As shown, the supporting supports 10 move closer to each other until the connecting blocks 81 abut together, and the connecting blocks on both sides of the snap-fit ​​block 16 are respectively inserted into the dovetail grooves 82 of the two sets of connecting blocks 81; the idler wheels 12 on the two sets of supporting supports 10 mesh together; when it is necessary to adjust the height of the lifting plate 3 on the supporting supports 10 at the same time, the two sets of supporting supports 10 need to be connected together, and the two sets of idler wheels 12 collide based on the connecting blocks 81; at the same time, the snap-fit ​​block 16 is used to keep the idler wheels 12 meshing together.

[0029] The two sets of rear lead screws 71 on the two sets of supporting supports 10 have opposite thread helix directions, and the two sets of front lead screws 72 have opposite thread helix directions, such as... Figure 4 As shown, the two sets of support seats 10 are connected by symmetrical gear transmission, so that when one set of lead screws 7 is rotated, the other set of lead screws 7 rotates in the opposite direction, and the direction of movement of the slider 6 is ensured to be consistent by setting the direction of screw thread.

[0030] Working principle: This structure is a dynamic balancing testing device for the impeller of a counter-rotating axial flow fan. Its main technical feature is that the two sets of support brackets 10 can be connected together to synchronously adjust the height of the support roller 4. Figure 4 As shown, the transmission between the two sets of support seats 10 is through idler wheel 12. When one set of lead screws 7 is rotated, the other set of lead screws 7 will also rotate accordingly, thereby changing the shape of the X-shaped bracket 5. When the slider 6 moves inward, the left connecting rod 51 and the right connecting rod 52 on the X-shaped bracket 5 are retracted, and the support roller 4 moves upward synchronously. Conversely, when the slider 6 moves outward, the support roller 4 moves downward synchronously.

[0031] At the same time, after separating the two sets of idler wheels 12, the height of the two sets of support supports 10 can also be adjusted independently.

[0032] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A dynamic balancing testing device for a counter-rotating axial flow fan impeller, comprising a dynamic balancing testing machine, wherein the dynamic balancing testing machine is provided with two sets of longitudinal support seats (10) on the left and right, each support seat (10) comprising a base (1) slidably connected to the dynamic balancing testing machine, wherein vertical plates (2) are fixedly connected to the front and rear sides of the base (1), and lifting plates (3) are respectively abutted against the sides of the base (1), wherein two sets of front and rear distributed support rollers (4) are provided in the middle of the lifting plate (3), wherein axles are inserted into the support rollers (4), and both ends of the axles are respectively inserted and fixed on the lifting plate (3); characterized in that: A longitudinal X-shaped bracket (5) is provided between the lifting plate (3) and the base (1). The X-shaped bracket (5) includes a left connecting rod (51) and a right connecting rod (52) placed at an angle. The middle parts of the left connecting rod (51) and the right connecting rod (52) are hinged together by a pin (53). The upper ends of the left connecting rod (51) and the right connecting rod (52) are respectively inserted between the lifting plate (3) and a transverse guide column (54) is inserted and fixed. The lower parts of the front and rear sides of the lifting plate (3) are respectively formed with longitudinal horizontal guide grooves (31). The two ends of the guide column (54) are respectively inserted into the guide grooves (31) of the lifting plate (3). Two sets of front and rear sliding blocks (6) are abutted on the base (1) on one side of the upright plate (2). A transverse support shaft (61) is formed on the sliding block (6), and the support shaft (61) is inserted into the lower end of the left connecting rod (51) and the right connecting rod (52) respectively. A longitudinal lead screw (7) is screwed onto the sliding block (6). The lead screw (7) is composed of two sets of rear lead screws (71) and front lead screws (72) with opposite helical directions. The two ends of the lead screw (7) are pivotally connected to the end seat (8), and the end seat (8) is fixed to the front and rear ends of the base (1). The front end of the lead screw (7) extends out of the end seat (8) and is inserted into a rocker arm. A transmission gear (11) is fixedly connected to the hand (9) and the rear end seat (8). An idler gear (12) meshes with the transmission gear (11). The idler gear (12) is hinged to the base (1) through the connecting shaft (13). One side of the idler gear (12) extends out of the inner end face of the base (1). A connecting block (81) extending towards the inner end face of the base (1) is formed on the end seat (8) on the rear side of the base (1). A vertical dovetail groove (82) is formed on the connecting block (81). A snap-fit ​​block (16) is inserted into the dovetail groove (82). The snap-fit ​​block (16) is composed of two dovetail-shaped connecting blocks on the left and right.

2. The dynamic balancing testing device for a counter-rotating axial flow fan impeller according to claim 1, characterized in that: The vertical plate (2) is formed with a vertical height adjustment groove (21), and a horizontal locking bolt (14) is inserted into the height adjustment groove (21). The locking bolt (14) is inserted and fixed on the lifting support plate (3), and the end of the locking bolt (14) extends out of the lifting support plate (3) and is screwed and fixed with a locking nut (15).

3. The dynamic balancing testing device for a counter-rotating axial flow fan impeller according to claim 1, characterized in that: The front and rear parts of the lead screw (7) are respectively fitted with limiting sleeves, and the limiting sleeves abut against the opposite end faces of the base (1).

4. The dynamic balancing testing device for a counter-rotating axial flow fan impeller according to claim 1, characterized in that: The diameter of the guide column (54) on the X-shaped bracket (5) is equal to the width of the guide groove (31) on the lifting plate (3); The guide groove (31) is located on the lower side of the support roller (4), and the upper end of the support roller (4) extends out of the upper end face of the lifting plate (3).

5. The dynamic balancing testing device for a counter-rotating axial flow fan impeller according to claim 4, characterized in that: The distance between the two sets of lifting plates (3) is equal to the sum of the thicknesses of the left connecting rod (51) and the right connecting rod (52), and the thickness of the left connecting rod (51) is equal to the thickness of the right connecting rod (52). The left connecting rod (51) and the right connecting rod (52) abut against the inner wall of the lifting plate (3) on one side respectively. The inner wall of the other side of the lifting plate (3) and the left connecting rod (51) or the right connecting rod (52) are provided with a spacer sleeve, which is fitted on the guide column (54).

6. The dynamic balancing testing device for a counter-rotating axial flow fan impeller according to claim 1, characterized in that: The two sets of support brackets (10) move closer to each other until the connecting blocks (81) abut together, and the connecting blocks on both sides of the snap-fit ​​block (16) are respectively inserted into the dovetail grooves (82) of the two sets of connecting blocks (81); The idler wheels (12) on the two sets of support seats (10) mesh together.

7. The dynamic balancing testing device for a counter-rotating axial flow fan impeller according to claim 1, characterized in that: The two sets of rear lead screws (71) on the two sets of support brackets (10) have opposite thread helical directions, and the two sets of front lead screws (72) have opposite thread helical directions.

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