A horizontal detection device for impeller form tolerance of ventilator and a method of using the same

Abstract

The present application belongs to the field of ventilator impeller detection, and particularly relates to a ventilator impeller form and position tolerance horizontal detection equipment and a use method thereof; wherein the detection equipment comprises a chassis, roller frames and a detection device; the chassis and the roller frames are two groups; each group of roller frames is fixedly installed at the top end of the chassis; and is supported at the lower ends of the two ends of the drive shaft of the ventilator impeller; the detection device is installed on the side of the ventilator impeller to be detected, and comprises a laser range finder; the laser emission port of the laser range finder is opposite to the end face of the ventilator impeller to be detected; the equipment is simple to install and convenient to operate, avoids damage to the balancing machine, thereby generating high repair costs and the like, and the detection method is easy to operate, and is conducive to improving the yield without increasing the number of balancing machines.

Description

Technical Field

[0001] This invention belongs to the field of ventilation fan impeller testing, specifically relating to a horizontal testing device and method for ventilation fan impeller form and position tolerances. Background Technology

[0002] Centrifugal fan impellers are mostly welded components. Before welding, the steel plates are shaped to ensure flatness. During welding, to prevent deformation, the parts to be welded are fixed on a platform, but thermal deformation is still unavoidable. After welding, the impeller needs to be shaped to ensure that the circular runout tolerance of the front and rear disc end faces meets the relevant provisions of JB / T 10214-2000 "Technical Conditions for Riveted and Welded Parts of Ventilation Fans". For double-support fans, shaping is generally performed after the impeller and main shaft are assembled. Before suitable tooling and testing equipment are available, the rotor is placed on a balancing machine, and a fixed reference object is placed at the edge of the front or rear disc to be tested. The impeller is rotated, and the relative distance between the front or rear disc and the reference object is observed after one revolution. Any deviations are shaped on the balancing machine. The inevitable impacts during the shaping process can damage the rollers of the balancing machine and affect its accuracy. This necessitates frequent repairs of the balancing machine rollers, which is not only costly but also reduces the efficiency of impeller balancing. Summary of the Invention

[0003] The present invention addresses the problems mentioned above by designing a horizontal testing device for the form and position tolerances of a ventilation fan impeller and its usage method, which can solve the problems of high cost and reduced impeller balancing efficiency in the prior art.

[0004] To achieve the above objectives, on the one hand, the present invention provides a horizontal testing device for the form and position tolerances of a ventilation fan impeller, comprising a base frame, a roller frame, and a testing device; the base frame and roller frame are in two sets; each set of roller frames is fixedly installed on the top of the base frame; and is respectively supported under both ends of the drive shaft of the ventilation fan impeller; the testing device is installed on the side of the ventilation fan impeller to be tested, and the testing port of the testing device faces the end face of the ventilation fan impeller to be tested.

[0005] By adopting the above technical solution, when it is necessary to test the form and position tolerances of the fan impeller, it can be done directly on this testing equipment, avoiding excessive use of the balancing machine and resulting in excessive repair costs.

[0006] Furthermore, the detection device includes a laser rangefinder, a horizontal bar, a column, and a base plate; the column is vertically connected to the base plate, the horizontal bar is installed on the column, and the laser rangefinder is fixedly installed on the horizontal bar, with the laser emission port of the laser rangefinder targeting the impeller of the ventilator to be detected.

[0007] By adopting the above technical solutions, data can be obtained in real time when the fan impeller is rotating. Moreover, the detection device is more flexible in location, easier to carry, and easier to detect.

[0008] Furthermore, the detection device also includes a horizontal bushing and a vertical bushing; the horizontal bushing and the vertical bushing are integrally formed and connected, and are perpendicular to each other; the vertical bushing is fitted onto the column, and the side of the vertical bushing has a through thread hole, and the relative position of the vertical bushing and the column is fixed and adjusted by tightening screws; the horizontal bushing is long and cylindrical, and the side has a through thread hole, the inner diameter of the cylindrical horizontal bushing is adapted to the cross-sectional diameter of the horizontal rod, the horizontal rod is inserted into the horizontal bushing, and the relative position of the horizontal rod and the horizontal bushing is fixed and adjusted by tightening screws.

[0009] By adopting the above technical solution, the detection device is equipped with horizontal and vertical bushings, which can adjust the spatial position of the laser emission port of the laser rangefinder at any time and avoid frequent movement of the entire detection device.

[0010] Furthermore, each set of roller frames includes a frame body, a main shaft, a flange, a connector, a bearing, and a retaining ring; the frame body is fixedly installed on the top of the base frame; there are two main shafts, bearings, and retaining rings, with the two bearings respectively mounted on the main shaft and fixed by the retaining rings, forming two assembly parts; the two assembly parts are respectively installed in the frame body, and the horizontal positions of the two main shafts are equal; there are two flanges, respectively fitted on both ends of the main shaft and located on the outside of the frame body, and each flange is fixedly connected to the corresponding main shaft; the two flanges are fixed to the frame body by connectors.

[0011] Furthermore, the base frame includes crossbeams, longitudinal beams, supports, diagonal braces, reinforcing ribs, and pads; there are multiple crossbeams and longitudinal beams, which are intersected and fixedly connected to form a plane; the top of the support is a horizontal plane and is perpendicular to the plane; the reinforcing rib is laterally connected to the middle of the support; there are two diagonal braces, one end of each diagonal brace is connected to one of the longitudinal beams, and the other end of each diagonal brace is connected to the reinforcing rib; the pads are installed on the top of the support.

[0012] On the other hand, the present invention also proposes a method for using a horizontal testing device for the form and position tolerances of a ventilation fan impeller, comprising the following steps: Step 1: Place the base frames at a certain distance apart. This distance should be adjusted according to the length of the fan rotor to be tested. Then, install the roller frames on the base frames respectively. Step 2: Use hoisting equipment to hoist the fan impeller to be tested to the testing area, so that the stepped shafts at both ends of the fan impeller rotor are placed on the bearings of the roller frame respectively; Step three requires ensuring that the centerline of the stepped shaft where the fan impeller is installed remains horizontal to ensure measurement accuracy; Step 4: Place the detection device on the same plane as the base frame, and adjust the horizontal and vertical bushings so that the laser emission port of the laser rangefinder is aligned with the end face of the impeller. Step 5: Turn on the laser rangefinder, rotate the impeller, and determine the horizontal offset of the impeller during rotation by observing the degree of the laser rangefinder, thereby measuring the form and position tolerance of the impeller.

[0013] In summary, the horizontal testing device for the form and position tolerances of a ventilation fan impeller and its method of use, as described in this invention, have the following advantages and beneficial technical effects: This invention effectively solves the problem of poor form and position tolerance detection in dual-support rotors, and can also reshape areas with out-of-tolerance dimensions on this equipment.

[0014] This invention avoids inspection and shaping on the balancing machine, thus preventing damage to the machine. Previous methods required repairing the rollers of the balancing machine every six months, resulting in high repair costs, reduced machine efficiency, and resource consumption. This new device allows rotors to be directly installed on the balancing machine after passing inspection, eliminating the need for extensive inspection and shaping on the balancing machine. This increases the machine's efficiency by over 50%, achieving increased production without increasing the number of balancing machines. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall main view of a horizontal testing device for the form and position tolerances of a ventilation fan impeller according to the present invention; Figure 2 This is a right-side view of the overall horizontal testing device for the form and position tolerances of a ventilation fan impeller according to the present invention; Figure 3 This is the front view of the base frame; Figure 4 This is the left view of the base frame; Figure 5 This is a top view of the base frame; Figure 6 This is the front view of the roller frame; Figure 7 This is the left view of the roller frame; Figure 8 This is a schematic diagram of the detection device.

[0016] The reference numerals in the attached figures are: 1-Base frame; 11-Crossbeam; 12-Longitudinal beam; 13-Support; 14-Diagonal brace; 15-Reinforcing rib; 16-Plate; 2-Roller frame; 21-Frame body; 22-Main shaft; 23-Flange; 24-Connector; 25-Bearing; 26-Retaining ring; 3-Detection device; 31-Laser rangefinder; 32-Horizontal bar; 33-Horizontal bushing; 34-Vertical bushing; 35-Column; 36-Base plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some embodiments of this invention, but not all embodiments; the embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention; all other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings:

Example 1

[0018] like Figure 3 , Figure 4 and Figure 5 As shown, the base frame 1 includes a crossbeam 11, a longitudinal beam 12, a support 13, diagonal braces 14, reinforcing ribs 15, and a base plate 16. The crossbeam 11 and the longitudinal beam 12 are multiple H-beams, which are welded to each other to form a plane. The top of the support 13 is a horizontal plane, which is connected perpendicularly to the plane. The reinforcing ribs 15 are welded laterally to the middle of the support 13 to provide reinforcement. There are two diagonal braces 14. One end of each diagonal brace 14 is welded to one of the longitudinal beams 12, and the other end of each diagonal brace 14 is welded to the reinforcing rib 15. The base plate 16 is welded to the top of the support 13, and four holes are opened at the four corners of the base plate 16.

[0019] like Figure 6 and Figure 7As shown, each set of roller frames 2 includes a frame 21, a main shaft 22, a flange 23, a connector 24, a bearing 25, and a retaining ring 26. The frame 21 has four holes at its four corners, which correspond to the four holes in the pad 16. The frame 21 is fixedly installed on the pad 16 with bolts and nuts. There are two main shafts 22, bearings 25, and retaining rings 26. The two bearings 25 are respectively assembled on the main shafts 22 and fixed by the retaining rings 26, forming two assemblies. The two assemblies are respectively installed inside the frame 21, and the two main shafts 22 are at the same horizontal position. There are two flanges 23, which are respectively fitted on both ends of the main shafts 22 and located on the outside of the frame 21. The two flanges 23 are respectively welded firmly to the corresponding main shafts 22. The two flanges 23 are fixed to the frame 21 by the connector 24.

[0020] like Figure 8 As shown, the detection device 3 includes a laser rangefinder 31, a horizontal rod 32, a horizontal bushing 33, a vertical bushing 34, a column 35, and a base plate 36. The column 35 is vertically connected to the base plate 36. The horizontal rod 32 is installed on the column 35, and the laser rangefinder 31 is fixedly installed on the horizontal rod 32. The laser emission port of the laser rangefinder 31 is aimed at the impeller of the ventilation fan to be tested. The horizontal bushing 33 and the vertical bushing 34 are integrally formed and connected, and are perpendicular to each other. The vertical bushing 34 is fitted onto the column 35. The side of the vertical bushing 34 has a threaded hole, and the relative position of the vertical bushing 34 and the column 35 is fixed and adjusted by tightening the screw. The horizontal bushing 33 is long and cylindrical, and has a threaded hole on its side. The inner diameter of the cylindrical horizontal bushing 33 is adapted to the cross-sectional diameter of the horizontal rod 32. The horizontal rod 32 is inserted into the horizontal bushing 33, and the relative position of the horizontal rod 32 and the horizontal bushing 33 is fixed and adjusted by tightening the screw.

[0021]

Example 2

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A horizontal testing device for the form and position tolerances of a ventilation fan impeller, characterized in that: It includes a base frame (1), a roller frame (2), and a detection device (3); the base frame (1) and the roller frame (2) are in two sets; each set of roller frames (2) is fixedly installed on the top of the base frame (1); and is supported at both ends of the drive shaft of the fan impeller; the detection device (3) is installed on the side of the fan impeller to be tested, and the detection port of the detection device (3) faces the end face of the fan impeller to be tested; Each set of roller frames (2) includes a frame (21), a main shaft (22), a flange (23), a connector (24), a bearing (25), and a retaining ring (26); The frame (21) is fixedly installed on the top of the base frame (1) by bolts and nuts; there are two main shafts (22), bearings (25) and retaining rings (26), and the two bearings (25) are respectively assembled on the main shafts (22) and fixed by the retaining rings (26) to form two assembly parts; the two assembly parts are respectively installed in the frame (21), and the horizontal positions of the two main shafts (22) are equal; There are two flanges (23), which are respectively fitted on both ends of the main shaft (22) and located on the outside of the frame (21). The two flanges (23) are respectively fixedly connected to the corresponding main shaft (22); the two flanges (23) are fixed on the frame (21) by connectors (24).

2. The horizontal testing device for the form and position tolerances of a ventilation fan impeller according to claim 1, characterized in that: The detection device (3) includes a laser rangefinder (31), a horizontal rod (32), a column (35), and a base plate (36); the column (35) is vertically connected to the base plate (36), the horizontal rod (32) is installed on the column (35), the laser rangefinder (31) is fixedly installed on the horizontal rod (32), and the laser emission port of the laser rangefinder (31) is aimed at the impeller of the ventilator to be detected.

3. The horizontal testing device for the form and position tolerances of a ventilation fan impeller according to claim 2, characterized in that: The detection device (3) further includes a horizontal bushing (33) and a vertical bushing (34); the horizontal bushing (33) and the vertical bushing (34) are integrally formed and connected, and are perpendicular to each other; the vertical bushing (34) is fitted on the column (35), and the side of the vertical bushing (34) is provided with a through thread hole, and the relative position of the vertical bushing (34) and the column (35) is fixed and adjusted by turning the screw; the horizontal bushing (33) is long cylindrical and is provided with a through thread hole on the side, the inner diameter of the cylindrical horizontal bushing (33) is adapted to the cross-sectional diameter of the horizontal rod (32), the horizontal rod (32) is inserted into the horizontal bushing (33), and the relative position of the horizontal rod (32) and the horizontal bushing (33) is fixed and adjusted by turning the screw.

4. The horizontal testing device for the form and position tolerances of a ventilation fan impeller according to claim 1, characterized in that: The base frame (1) includes a crossbeam (11), a longitudinal beam (12), a support (13), a diagonal brace (14), a reinforcing rib (15), and a pad (16). There are multiple crossbeams (11) and longitudinal beams (12), which are intersected and fixedly connected to form a plane. The top of the support (13) is a horizontal plane, which is perpendicular to the plane. The reinforcing rib (15) is horizontally connected to the middle of the support (13). There are two diagonal braces (14). One end of each diagonal brace (14) is connected to one of the longitudinal beams (12), and the other end of each diagonal brace (14) is connected to the reinforcing rib (15). The pad (16) is installed on the top of the support (13).

5. A method of using a horizontal testing device for the form and position tolerances of a ventilation fan impeller, characterized in that, The horizontal dimensional tolerance testing equipment for ventilator impellers as described in claim 3 is used to perform dimensional tolerance testing and shaping of ventilator impellers, comprising the following steps: Step 1: Place the base frame (1) at a certain distance. This distance should be adjusted according to the length of the fan rotor to be tested. Then, install the roller frame (2) on the base frame (1). Step 2: Use hoisting equipment to hoist the impeller of the fan to be tested to the testing area, so that the stepped shafts at both ends of the fan impeller rotor are placed on the bearings (25) of the roller frame (2); Step three requires ensuring that the centerline of the stepped shaft where the fan impeller is installed remains horizontal to ensure measurement accuracy; Step 4: Place the detection device (3) on the same plane as the base frame (1), and adjust the horizontal bushing (33) and vertical bushing (34) so ​​that the laser emission port of the laser rangefinder (31) is aligned with the end face of the impeller. Step 5: Turn on the laser rangefinder (31), rotate the impeller, and determine the horizontal offset of the impeller during rotation by observing the degree of the laser rangefinder (31), thereby measuring the form and position tolerance of the impeller. Step six involves correcting any areas where the impeller dimensions are out of tolerance using a horizontal dimensional tolerance testing device for the fan impeller.

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