A processing tool for a low-noise centrifugal fan impeller

Abstract

The utility model relates to a kind of processing tool of low-noise centrifugal fan impeller, including two left and right distribution front columns, several vertical uniform distribution fixed clamping rollers are fixedly connected between front columns, fixed roller sleeve is inserted into the fixed clamping roller between front columns;The rear of front column is equipped with rear column, several vertical uniform distribution and opposite fixed clamping roller angle iron are fixedly connected between rear column, the outer side wall of rear column and front column is respectively fixed with two groups of longitudinal slot rail of upper and lower;Several groups of vertical uniform distribution and fixed clamping roller are inserted into the dynamic clamping roller of being close to fixed clamping roller between fixed clamping roller and angle iron, the both ends of dynamic clamping roller are respectively inserted into vertical linkage rod, and the both ends of fixed clamping roller are respectively extended front column and are pivoted in the front end of front connecting rod.This tool is equipped with multiple groups of vertical centrifugal blades, the clamping and fixing of centrifugal blade are facilitated, the linear cutting processing of multiple groups of centrifugal blades can be simultaneously carried out in noise reduction tooth slot, and processing efficiency is indirectly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of centrifugal impellers, and more specifically to a machining tooling for a low-noise centrifugal fan impeller. Background Technology

[0002] A high-pressure centrifugal fan is a mechanical device that increases gas pressure and transports gas by inputting mechanical energy. Its core characteristic is high-pressure output, with an operating pressure range typically from 30 kPa to 200 kPa (or higher). A high-pressure centrifugal fan generally consists of a centrifugal casing, a centrifugal impeller, and a motor. The impeller typically comprises a rear impeller plate, a front impeller plate, and centrifugal blades arranged in a ring between the rear and front impeller plates. High-pressure centrifugal fans generate noise during operation. To reduce noise, serrated grooves are currently machined on the trailing edge of the centrifugal blades. For some sheet metal centrifugal blades, the grooves can be machined by stamping, while for some cast centrifugal blades, wire cutting is proposed. However, because the inner and outer surfaces of the centrifugal blades are uniformly curved, and the two sets of curved surfaces cannot overlap and abut together, multiple centrifugal blades cannot be stacked for wire cutting in one go. Processing a single blade is slow, so a tooling design is needed to allow multiple centrifugal blades to be wire-cut simultaneously. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a machining fixture for a low-noise centrifugal fan impeller. The fixture has multiple sets of centrifugal blades arranged vertically inside, which facilitates the clamping and fixing of the centrifugal blades and can meet the requirement of simultaneous wire cutting of noise-reducing tooth grooves for multiple sets of centrifugal blades, thereby indirectly improving the machining efficiency.

[0004] A machining fixture for a low-noise centrifugal fan impeller includes two front columns distributed to the left and right. Several vertically evenly distributed fixed clamping rollers are inserted and fixed between the front columns, and fixed roller sleeves are inserted on the fixed clamping rollers between the front columns. A rear column is provided directly behind the front columns. Several vertically evenly distributed angle irons opposite to the fixed clamping rollers are inserted and fixed between the rear columns. Two sets of longitudinal groove rails are fixed on the outer walls of the rear columns and the front columns, respectively. Several sets of vertically evenly distributed movable clamping rollers close to the fixed clamping rollers are inserted between the fixed clamping rollers and the angle irons. The two ends of the movable clamping rollers are respectively inserted and fixed with vertical linkage rods through the inclined front connecting rods. The two ends of the fixed clamping rollers extend out of the front columns and are pivotally connected to the front ends of the front connecting rods.

[0005] Two sets of inclined driving rods are distributed and sleeved on the movable pinch roller end at the top of the linkage rod. The upper ends of the driving rods are inserted into the transverse driving shaft, and two ends of the driving shaft extend out of the driving rods and are respectively sleeved with sliding blocks, which are inserted into the groove rails; the middle part of the driving shaft is sleeved with a driving sleeve, a longitudinal screw rod is formed on the driving sleeve, the rear end of the screw rod passes through the transverse middle support beam and is screwed with a limit nut, and the screw rod on the front side of the middle support beam is screwed with a clamping nut; two ends of the middle support beam are respectively fixedly connected to the groove rails.

[0006] Preferably, the movable pinch roller is sleeved with a movable roller sleeve, a gap is provided between the end of the movable roller sleeve and the front link, the driving rod is arranged between the movable roller sleeve and the front link; the inclination direction of the driving rod is consistent with the inclination direction of the front link.

[0007] Preferably, the upper ends of the rear upright posts are fixedly connected with a transverse rear support beam, and the lower ends of the front upright posts are fixedly connected with a transverse front support beam.

[0008] Preferably, the groove rail comprises a channel steel with a "C"-shaped longitudinal section, and one side of the groove opening at the front end of the channel steel is welded and fixed on the outer side wall of the front upright post;

[0009] A longitudinal adjusting rod is inserted into the channel at the rear side of the channel steel, the rear end of the adjusting rod is fixedly connected to the outer side wall of the rear upright post; a longitudinal adjusting groove is formed on the side wall of the rear part of the channel steel, a locking screw is inserted into the adjusting groove, the tail end of the locking screw is screwed and fixed on the adjusting rod, and the head of the locking screw is pressed against the outer side wall of the channel steel;

[0010] The end part of the middle support beam is fixedly connected to the channel steel, and the sliding block is inserted into the channel steel.

[0011] Preferably, the length of the movable roller sleeve is consistent with the length of the fixed roller sleeve; two ends of the fixed roller sleeve respectively abut against the front upright posts.

[0012] Preferably, the upper ends of the front upright posts are flush with the upper ends of the rear upright posts, and the lower ends of the front upright posts are flush with the lower ends of the rear upright posts.

[0013] The beneficial effects of the utility model lie in that:

[0014] A plurality of sets of centrifugal blades arranged vertically are arranged in the tooling, which is convenient for clamping and fixing the centrifugal blades, can meet the simultaneous wire cutting machining of noise reduction tooth grooves for multiple sets of centrifugal blades, and indirectly improves the machining efficiency. Brief Description of the Drawings

[0015] Figure 1 is a schematic perspective structural view of the utility model;

[0016] Figure 2 is a schematic front structural view of the utility model;

[0017] Figure 3 is Figure 2 Schematic diagram of cross-section at point AA.

[0018] In the diagram: 1. Front column; 2. Fixed clamping roller; 3. Fixed roller sleeve; 4. Rear column; 5. Channel rail; 6. Angle iron; 7. Moving roller sleeve; 8. Moving clamping roller; 9. Linkage rod; 10. Front connecting rod; 11. Drive rod; 12. Drive shaft; 13. Slider; 14. Drive sleeve; 141. Screw; 15. Clamping nut; 16. Middle support beam; 17. Limit nut; 18. Rear support beam; 19. Front support beam; 20. Centrifugal blade. Detailed Implementation

[0019] Example: See Figures 1 to 3 As shown, a machining fixture for a low-noise centrifugal fan impeller includes two front columns 1 distributed to the left and right. Several vertically evenly distributed fixed clamping rollers 2 are inserted and fixed between the front columns 1. Fixed roller sleeves 3 are inserted and fitted onto the fixed clamping rollers 2 between the front columns 1. A rear column 4 is provided directly behind the front columns 1. Several vertically evenly distributed angle irons 6 opposite to the fixed clamping rollers 2 are inserted and fixed between the rear columns 4. Two sets of longitudinal groove rails 5 are fixed on the outer walls of the rear columns 4 and the front columns 1, respectively. Several sets of vertically evenly distributed movable clamping rollers 8 are inserted between the fixed clamping rollers 2 and the angle irons 6 and are close to the fixed clamping rollers 2. The two ends of the movable clamping rollers 8 pass through the inclined front connecting rods 10 and are inserted and fixed with vertical linkage rods 9. The two ends of the fixed clamping rollers 2 extend out of the front columns 1 and are pivotally connected to the front end of the front connecting rods 10.

[0020] Two sets of inclined drive rods 11 are distributed and sleeved at the end of the movable clamping roller 8 at the top of the linkage rod 9. The upper end of the drive rod 11 is inserted into the transverse drive shaft 12. The two ends of the drive shaft 12 extend out of the drive rod 11 and are respectively sleeved with sliders 13. The sliders 13 are inserted into the groove rail 5. The middle part of the drive shaft 12 is sleeved with a drive sleeve 14. The drive sleeve 14 is formed with a longitudinal screw 141. The rear end of the screw 141 passes through the transverse central support beam 16 and is screwed with a limit nut 17. The screw 141 on the front side of the central support beam 16 is screwed with a clamping nut 15. The two ends of the central support beam 16 are respectively fixed to the groove rail 5.

[0021] The movable clamping roller 8 is fitted with a movable roller sleeve 7, and there is a gap between the end of the movable roller sleeve 7 and the front connecting rod 10. The drive rod 11 is disposed between the movable roller sleeve 7 and the front connecting rod 10. The inclination direction of the drive rod 11 is consistent with the inclination direction of the front connecting rod 10.

[0022] A transverse rear support beam 18 is fixedly connected between the upper ends of the rear column 4, and a transverse front support beam 19 is fixedly connected between the lower ends of the front column 1. The rear support beam 18 and the front support beam 19 can improve the strength of the entire fixture. At the same time, mounting holes can be opened on the front support beam 19, and the entire fixture can be installed and fixed on the clamping table of the wire cutting equipment by bolts.

[0023] Said slot rail 5 comprises a channel steel 51 with a "C"-shaped longitudinal section, one side of the front notch of the channel steel 51 is welded and fixed on the outer side wall of the front upright 1;

[0024] A longitudinal adjusting rod 52 is inserted into the channel at the rear side of said channel steel 51, the rear end of the adjusting rod 52 is fixedly connected to the outer side wall of the rear upright 4; a longitudinal adjusting slot 511 is formed on the side wall of the rear part of the channel steel 51, a locking screw 53 is inserted into the adjusting slot 511, the tail end of the locking screw 53 is screwed and fixed on the adjusting rod 52, and the head part is pressed against the outer side wall of the channel steel 51; the composition of said slot rail 5 can realize the length adjustment between the front upright 1 and the rear upright 4, so as to adapt to the clamping and use of centrifugal blades 20 with different lengths;

[0025] The end of said middle support beam 16 is fixedly connected to the channel steel 51, and the slider 13 is inserted into the channel steel 51.

[0026] The length of said movable roller sleeve 7 is consistent with the length of the fixed roller sleeve 3; two ends of the fixed roller sleeve 3 abut against the front upright 1 respectively.

[0027] The upper end of said front upright 1 is flush with the upper end of the rear upright 4, the lower end of the front upright 1 is flush with the lower end of the rear upright 4, the upper end face of the middle support beam 16, the upper end face of the rear support beam 18 and the upper end of the rear upright 4 are also flush, and the lower end face of the channel steel 51 at the lower part of said front upright 1 is also flush with the lower end of the front upright 1.

[0028] Working principle: This structure is a processing tooling for a low-noise centrifugal fan impeller, as Figure 2 shown, the leading edge of the centrifugal blade 20 abuts against the angle iron 6, the lower surface of the trailing edge part of the centrifugal blade 20 abuts against the fixed roller sleeve 3, then by rotating the clamping nut 15, the driving shaft 12 is driven to move forward, the inclination angle of the driving rod 11 becomes larger, which further prompts the front link 10 to rotate downward, and under the linkage of the linkage rod 9, all the movable roller sleeves 7 can be respectively pressed against the upper surfaces of the corresponding centrifugal blades 20;

[0029] Thereby, multiple sets of centrifugal blades 20 are clamped and fixed in the present tooling in a vertically distributed manner.

[0030] The described embodiments are used to illustratively explain the present utility model, not to limit the present utility model. Any person skilled in the art can modify the described embodiments without departing from the spirit and scope of the present utility model, therefore the protection scope of the rights of the present utility model shall be as listed in the claims of the present utility model.

Claims

1. A machining fixture for a low-noise centrifugal fan impeller, comprising two front columns (1) distributed to the left and right, wherein a plurality of vertically evenly distributed fixed clamping rollers (2) are inserted and fixed between the front columns (1), and fixed roller sleeves (3) are inserted and fitted onto the fixed clamping rollers (2) between the front columns (1); characterized in that: A rear upright (4) is arranged directly behind the front upright (1), a plurality of vertically evenly distributed angle irons (6) opposite to the fixed pinch roller (2) are inserted and fixed between the rear uprights (4), and two sets of upper and lower longitudinal groove rails (5) are respectively fixed on the outer side walls of the rear upright (4) and the front upright (1); a plurality of sets of vertically evenly distributed movable pinch rollers (8) adjacent to the fixed pinch roller (2) are inserted between the fixed pinch roller (2) and the angle iron (6), two ends of the movable pinch roller (8) respectively pass through the inclined front connecting rods (10) and are inserted and fixed with vertical linkage rods (9), and two ends of the fixed pinch roller (2) respectively extend out of the front upright (1) and are pivotally connected to the front ends of the front connecting rods (10); Two sets of inclined driving rods (11) are distributed and sleeved on the end portion of the movable pinch roller (8) at the top end of the linkage rod (9), the upper ends of the driving rods (11) are inserted into the transverse driving shaft (12), two ends of the driving shaft (12) extend out of the driving rods (11) and are respectively sleeved with sliding blocks (13), and the sliding blocks (13) are inserted into the groove rails (5); the middle part of the driving shaft (12) is sleeved with a driving sleeve (14), a longitudinal screw rod (141) is formed on the driving sleeve (14), the rear end of the screw rod (141) passes through the transverse middle support beam (16) and is in threaded connection with a limit nut (17), and the screw rod (141) on the front side of the middle support beam (16) is in threaded connection with a clamping nut (15); two ends of the middle support beam (16) are respectively fixedly connected to the groove rails (5).

2. The machining fixture for a low-noise centrifugal fan impeller according to claim 1, characterized in that: A movable roller sleeve (7) is sleeved on the movable pinch roller (8), a gap is provided between the end of the movable roller sleeve (7) and the front connecting rod (10), and the driving rod (11) is arranged between the movable roller sleeve (7) and the front connecting rod (10); the inclination direction of the driving rod (11) is consistent with the inclination direction of the front connecting rod (10).

3. The machining fixture for a low-noise centrifugal fan impeller according to claim 1, characterized in that: A transverse rear support beam (18) is fixedly connected between the upper ends of the rear uprights (4), and a transverse front support beam (19) is fixedly connected between the lower ends of the front uprights (1).

4. The machining fixture for a low-noise centrifugal fan impeller according to claim 1, characterized in that: The groove rail (5) comprises a channel steel (51) with a "C"-shaped longitudinal section, and one side of the notch at the front end of the channel steel (51) is welded and fixed on the outer side wall of the front upright (1); A longitudinal adjusting rod (52) is inserted into the channel at the rear side of the channel steel (51), and the rear end of the adjusting rod (52) is fixedly connected to the outer side wall of the rear upright (4); a longitudinal adjusting groove (511) is formed on the side wall of the rear part of the channel steel (51), a locking screw (53) is inserted into the adjusting groove (511), the tail end of the locking screw (53) is screwed and fixed on the adjusting rod (52), and the head thereof is pressed against the outer side wall of the channel steel (51); The end of the middle support beam (16) is fixedly connected to the channel steel (51), and the sliding block (13) is inserted into the channel steel (51).

5. The machining fixture for a low-noise centrifugal fan impeller according to claim 2, characterized in that: The length of the movable roller sleeve (7) is consistent with the length of the fixed roller sleeve (3); two ends of the fixed roller sleeve (3) respectively abut against the front upright (1).

6. The machining fixture for a low-noise centrifugal fan impeller according to claim 1, characterized in that: The upper end of the front upright (1) is flush with the upper end of the rear upright (4), and the lower end of the front upright (1) is flush with the lower end of the rear upright (4).

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