Impeller profile detection assembly

Abstract

The application relates to the field of impeller detection equipment technology, in particular to an impeller profile detection assembly which comprises a workbench, a reference table for placing an impeller is arranged on the workbench, a plurality of supporting rods are arranged on the reference table, a through hole for the plurality of supporting rods to pass through is arranged on the workbench and the reference table, the plurality of supporting rods are arranged in the circumferential direction of the reference table axis, the supporting rods can abut against the inner wall of an impeller shaft hole, a first driving assembly for driving the plurality of supporting rods to synchronously spread outwards or contract inwards is arranged on the workbench, a movable seat is slidingly arranged on the workbench, a second driving assembly for driving the movable seat to move along the circumferential direction of the reference table is arranged on the workbench, a fixing frame is connected to the movable seat, a plurality of displacement sensors for detecting the profile of the impeller are connected to the fixing frame, the plurality of displacement sensors are arranged in the height direction of the fixing frame, and the displacement sensors are electrically connected to a detection terminal. The application has the effect of improving the detection efficiency of the size of the impeller.

Description

Technical Field

[0001] This utility model relates to the field of impeller testing equipment technology, and in particular to an impeller profile testing component. Background Technology

[0002] The clearance between the impeller and the volute of a centrifugal air compressor directly affects the overall efficiency of the compressor. An excessively large clearance can cause internal gas leakage, reducing the compressor's efficiency. Conversely, an insufficient clearance increases the likelihood of scraping between the impeller and volute during operation. Therefore, profile inspection after impeller machining is an essential step.

[0003] In existing technologies, centrifugal impeller profile inspection generally involves using coordinate measuring machines to measure the centrifugal impeller profile, projecting and comparing the centrifugal impeller profile, or using go / no-go gauges to inspect the centrifugal impeller profile. However, blade defects in centrifugal impellers are generally caused by the blade size increasing during the centrifugal impeller manufacturing process. If the above methods are used to inspect the profile of the centrifugal impeller with increased size, the efficiency is low and the cost is high.

[0004] Therefore, how to improve the profile detection efficiency after the impeller size increases has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To improve the efficiency of impeller dimension detection, this application provides an impeller profile detection component.

[0006] The impeller profile detection assembly provided in this application adopts the following technical solution: An impeller profile detection assembly includes a worktable with a reference platform for placing an impeller. A plurality of support rods are mounted on the reference platform. Both the worktable and the reference platform have through holes for the support rods to pass through. The support rods are evenly arranged circumferentially around the axis of the reference platform. Each support rod can abut against the inner wall of the impeller shaft hole. A first drive assembly is provided on the worktable to drive the support rods to synchronously expand outward or contract inward. A movable seat is slidably mounted on the worktable. A second drive assembly is provided on the worktable to drive the movable seat to move circumferentially along the reference platform. A fixed frame is connected to the movable seat. A plurality of displacement sensors for detecting the impeller profile are connected to the fixed frame. The displacement sensors are all arranged along the height direction of the fixed frame and are electrically connected to a detection terminal.

[0007] Preferably, the first drive assembly includes a mounting frame, a push cylinder, a drive rod, a first hinge seat, a second hinge seat, a connecting rod, a pin, and a guide rod. The mounting frame is connected to the bottom of the worktable, the push cylinder is connected to the mounting frame, the axis of the piston rod of the push cylinder is collinear with the axis of the reference platform, the piston rod of the push cylinder is coaxially connected to the drive rod, the first hinge seat is connected to the drive rod, the second hinge seat is connected to the support rod, one end of the connecting rod is connected to the first hinge seat by a pin, and the other end is connected to the second hinge seat by a pin. The connecting rod is inclined, and two connecting rods are provided between the drive rod and each support rod. The two connecting rods are arranged vertically, the guide rod is fixedly connected to the bottom end of the support rod, and the guide rod is perpendicular to the support rod. A guide hole for the guide rod to move is provided on the worktable.

[0008] Preferably, the push cylinder has a built-in pressure sensor, and the pressure sensor is electrically connected to the detection terminal.

[0009] Preferably, the surface of the support rod that contacts the impeller shaft hole is an arc surface.

[0010] Preferably, the second drive assembly includes a main guide rail, a bearing, a connecting shaft, a roller, a drive motor, a first bevel gear, and a second bevel gear. The main guide rail is connected to the worktable and is circular in shape with a T-shaped cross-section. The bottom of the movable seat has a sliding groove adapted to the main guide rail, and the movable seat has an installation groove. The bottom of the installation groove has a connecting hole, and there is one connecting hole on each of the inner and outer sides of the main guide rail. The bearing is connected to the connecting hole, one end of the connecting shaft is connected to the bearing, and the other end extends out of the movable seat. The roller is connected to the end of the connecting shaft that extends out of the movable seat and rolls against the side wall of the main guide rail. The drive motor is installed in the installation groove, the first bevel gear is connected to the drive shaft of the drive motor, and the second bevel gear is connected to the end of one of the connecting shafts located in the installation groove. The first bevel gear and the second bevel gear mesh with each other.

[0011] Preferably, the main guide rail has an opening, and a secondary guide rail is bolted to the worktable. The secondary guide rail is located inside the opening, and the main guide rail and the secondary guide rail are combined to form a complete circle.

[0012] Preferably, an alarm is connected to the movable base, and the alarm is electrically connected to the detection terminal.

[0013] In summary, this application includes the following beneficial technical effects: 1. The impeller profile detection component provided by this utility model can quickly clamp the impeller by driving several support rods through the first drive component during assembly, and can automatically center the impeller on the reference platform. During detection, the movable seat and the sensor located on the reference platform are moved circumferentially by the second drive component, realizing automated and continuous scanning of the impeller profile. Compared with the traditional manual operation of coordinate measuring machine or projection comparison, it greatly reduces the time consumption of manual intervention and single-point measurement. Multiple displacement sensors set along the height direction on the fixed frame can simultaneously measure the profile at different height positions of the impeller (e.g., from the hub to the rim) during the movement of the movable seat. This multi-point synchronous data acquisition method can significantly improve the data acquisition speed and coverage compared with single-point measurement or local contact inspection of go and no-go gauges, thereby improving the detection efficiency of impeller size.

[0014] 2. The present invention provides an impeller profile detection component. The component has a relatively complex structure, but its core is a mechanical structure and a standard sensor. Its overall manufacturing and maintenance costs are far lower than those of a high-precision coordinate measuring machine. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the impeller profile detection component in an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram illustrating the guide rod in an embodiment of this application; Figure 4 This is a schematic diagram illustrating the internal structure of the movable seat in the embodiments of this application.

[0016] Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Reference platform; 3. Support rod; 4. First drive assembly; 41. Mounting bracket; 42. Push cylinder; 43. Drive rod; 44. First hinge seat; 45. Second hinge seat; 46. Connecting rod; 47. Pin; 48. Guide rod; 5. Movable seat; 51. Fixed frame; 52. Displacement sensor; 53. Alarm; 6. Second drive assembly; 61. Main guide rail; 611. Secondary guide rail; 62. Bearing; 63. Connecting shaft; 64. Roller; 65. Drive motor; 66. First bevel gear; 67. Second bevel gear. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or specific orientation structure and operation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] This application discloses an impeller profile detection component. (Refer to...) Figures 1-4 The impeller profile detection assembly includes a worktable 1, a reference platform 2 for placing the impeller on the worktable 1, and several support rods 3 on the reference platform 2. Both the worktable 1 and the reference platform 2 have through holes for the support rods 3 to pass through. The support rods 3 are evenly arranged circumferentially along the axis of the reference platform 2. The support rods 3 can abut against the inner wall of the impeller shaft hole. The worktable 1 is equipped with a first drive assembly 4 for driving the support rods 3 to expand outward or contract inward synchronously. A movable seat 5 is slidably arranged on the worktable 1. The worktable 1 is equipped with a second drive assembly 6 for driving the movable seat 5 to move circumferentially along the reference platform 2. A fixed frame 51 is connected to the movable seat 5. Several displacement sensors 52 for detecting the impeller profile are connected to the fixed frame 51. The displacement sensors 52 are all arranged along the height direction of the fixed frame 51. The displacement sensors 52 are electrically connected to a detection terminal.

[0020] During assembly, the first drive assembly 4 can drive several support rods 3 to quickly clamp the impeller and automatically center the impeller on the reference platform 2. During inspection, the second drive assembly 6 drives the movable seat 5 and the sensor located on the reference platform to move circumferentially, realizing automated and continuous scanning of the impeller profile. Compared with traditional manual three-coordinate measurement or projection comparison, it greatly reduces the time consumption of manual intervention and single-point measurement. Multiple displacement sensors 52 set along the height direction on the fixed frame 51 can simultaneously measure the profile of the impeller at different height positions (e.g., from the hub to the rim) during the movement of the movable seat 5. This multi-point synchronous data acquisition method, compared with single-point measurement or local contact inspection of go and no-go gauges, increases the data acquisition speed and coverage by several times, thereby improving the efficiency of impeller size detection.

[0021] The first drive assembly 4 includes a mounting bracket 41, a push cylinder 42, a drive rod 43, a first hinge seat 44, a second hinge seat 45, a connecting rod 46, a pin 47, and a guide rod 48. The mounting bracket 41 is connected to the bottom of the worktable 1. The push cylinder 42 is connected to the mounting bracket 41. The axis of the piston rod of the push cylinder 42 is collinear with the axis of the reference platform 2. The piston rod of the push cylinder 42 is coaxially connected to the drive rod 43. The first hinge seat 44 is connected to the drive rod 43. The second... The hinge seat 45 is connected to the support rod 3. One end of the connecting rod 46 is connected to the first hinge seat 44 through the pin 47, and the other end is connected to the second hinge seat 45 through the pin 47. The connecting rod 46 is inclined. Two connecting rods 46 are provided between the drive rod 43 and each support rod 3. The two connecting rods 46 are arranged vertically. The guide rod 48 is fixedly connected to the bottom end of the support rod 3. The guide rod 48 is perpendicular to the support rod 3. The worktable 1 is provided with a guide hole for the guide rod 48 to move.

[0022] The cylinder 42 has a built-in pressure sensor, which is electrically connected to the detection terminal.

[0023] The pressure sensor built into the cylinder 42 feeds back the clamping force signal to the detection terminal. This ensures that the force applied by the strut 3 to the impeller shaft hole is within a safe and appropriate range, which can reliably fix the impeller to prevent movement during measurement, and avoid excessive clamping force that could cause impeller deformation or even damage, thus ensuring the stability of the detection process.

[0024] The surface of the strut 3 that contacts the impeller shaft hole is an arc surface, which serves to protect the inner wall of the impeller shaft hole.

[0025] The second drive assembly 6 includes a main guide rail 61, a bearing 62, a connecting shaft 63, a roller 64, a drive motor 65, a first bevel gear 66, and a second bevel gear 67. The main guide rail 61 is connected to the worktable 1 and is circular in shape with a "T" shaped cross-section. The bottom of the movable seat 5 has a sliding groove adapted to the main guide rail 61, and the movable seat 5 has an installation groove. The bottom of the installation groove has a connecting hole, and there is one connecting hole on the inner and outer sides of the main guide rail 61. The bearing 62 is connected to the connecting hole. One end of the connecting shaft 63 is connected to the bearing 62, and the other end passes through the movable seat 5. The roller 64 is connected to the end of the connecting shaft 63 that passes through the movable seat 5 and rolls against the side wall of the main guide rail 61. The drive motor 65 is installed in the installation groove. The first bevel gear 66 is connected to the drive shaft of the drive motor 65, and the second bevel gear 67 is connected to the end of one of the connecting shafts 63 located in the installation groove. The first bevel gear 66 and the second bevel gear 67 mesh with each other.

[0026] An opening is provided on the main guide rail 61, and a secondary guide rail 611 is connected to the worktable 1 by bolts. The secondary guide rail 611 is located inside the opening, and the main guide rail 61 and the secondary guide rail 611 are combined to form a complete circle.

[0027] An alarm 53 is connected to the movable base 5, and the alarm 53 is electrically connected to the detection terminal.

[0028] The alarm 53 connected to the movable seat 5 is linked to the detection terminal. When the detected profile deviation exceeds the preset tolerance range, or when the pressure sensor detects abnormal clamping force, the alarm 53 can issue a warning in a timely manner (such as sound and light), which allows the operator to intervene immediately and prevent batch defects or equipment / workpiece damage.

[0029] This application provides a detection process for an impeller profile detection assembly: 1. Equipment preparation and initialization: Connect the equipment power supply and start the testing terminal system.

[0030] Check the air pressure of cylinder 42, the status of drive motor 65, and whether displacement sensor 52 is properly connected and calibrated.

[0031] In the testing terminal software, set parameters such as impeller model, profile tolerance range, clamping force safety range, scanning speed (moving speed of movable seat 5), and data sampling frequency.

[0032] Clean the surfaces of reference stage 2 and worktable 1.

[0033] 2. Clamping the impeller: Place the impeller on the reference platform 2 and pass it through the outside of the support rod 3. The impeller shaft hole should be roughly aligned with the center bearing 62 of the reference platform 2. Then, use the push cylinder 42 to push the drive rod 43 upward. Through the connecting rod 46 mechanism composed of the first hinge seat 44, the second hinge seat 45, the pin 47 and the connecting rod 46, all the support rods 3 are driven to move outward synchronously along the guide rod 48 under the constraint of the guide hole, so that they press against the inner wall of the impeller shaft hole to center and clamp the impeller.

[0034] 3. Impeller profile detection: The first bevel gear 66 is driven to rotate by the drive motor 65. The first bevel gear 66 and the second bevel gear 67 work together to drive the connecting shaft 63 and the roller 64 to rotate. The roller 64 drives the movable seat 5 to move along the guide rail, so that multiple displacement sensors 52 on the movable seat 5 continuously emit detection signals to the impeller and receive the signals reflected from the impeller blade profile. All displacement sensors 52 measure the distance to the corresponding impeller blade profile point in real time and transmit the distance data (combined with height position information) and the real-time circumferential angle position information of the movable seat 5 to the detection terminal. The detection terminal software receives and processes the massive amount of distance data and corresponding angle and height position data from all displacement sensors 52, and compares the data with the preset data. Once the software detects that the deviation value of a certain point or area exceeds the preset tolerance range, or the clamping force exceeds the safety range, the detection terminal will immediately send a signal to the alarm 53 on the movable seat 5. The alarm 53 will be triggered immediately to remind the operator to pay attention to the abnormality. The detection terminal finally generates a detection report and feeds it back to the user.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A blade profile detection assembly, characterized by: The system includes a worktable (1), on which a reference platform (2) for placing an impeller is provided. Several support rods (3) are provided on the reference platform (2). Both the worktable (1) and the reference platform (2) have through holes through which the support rods (3) pass. The support rods (3) are evenly arranged circumferentially around the axis of the reference platform (2). The support rods (3) can abut against the inner wall of the impeller shaft hole. The worktable (1) is provided with a first driving assembly for driving the support rods (3) to synchronously expand outward or contract inward. (4) A movable seat (5) is slidably arranged on the worktable (1). A second drive assembly (6) for driving the movable seat (5) to move circumferentially along the reference platform (2) is provided on the worktable (1). A fixed frame (51) is connected to the movable seat (5). Several displacement sensors (52) for detecting the impeller profile are connected to the fixed frame (51). Several displacement sensors (52) are all arranged along the height direction of the fixed frame (51). The displacement sensors (52) are electrically connected to a detection terminal.

2. A blade profile detection assembly according to claim 1, wherein: The first drive assembly (4) includes a mounting bracket (41), a push cylinder (42), a drive rod (43), a first hinge seat (44), a second hinge seat (45), a connecting rod (46), a pin (47), and a guide rod (48). The mounting bracket (41) is connected to the bottom of the worktable (1). The push cylinder (42) is connected to the mounting bracket (41). The axis of the piston rod of the push cylinder (42) is collinear with the axis of the reference platform (2). The piston rod of the push cylinder (42) is coaxially connected to the drive rod (43). The first hinge seat (44) is connected to the drive rod (43). Two hinge seats (45) are connected to the support rod (3). One end of the connecting rod (46) is connected to the first hinge seat (44) through a pin (47), and the other end is connected to the second hinge seat (45) through a pin (47). The connecting rod (46) is inclined. Two connecting rods (46) are provided between the drive rod (43) and each support rod (3). The two connecting rods (46) are arranged vertically. The guide rod (48) is fixedly connected to the bottom end of the support rod (3). The guide rod (48) is perpendicular to the support rod (3). The worktable (1) is provided with a guide hole for the guide rod (48) to move.

3. A vane profile detection assembly according to claim 2, wherein: The push cylinder (42) has a built-in pressure sensor, which is electrically connected to the detection terminal.

4. A vane profile detection assembly according to claim 1, wherein: The surface of the support rod (3) that contacts the impeller shaft hole is an arc surface.

5. A vane profile detection assembly according to claim 1, wherein: The second drive assembly (6) includes a main guide rail (61), a bearing (62), a connecting shaft (63), a roller (64), a drive motor (65), a first bevel gear (66), and a second bevel gear (67). The main guide rail (61) is connected to the worktable (1). The main guide rail (61) is circular in shape, and its cross-section is T-shaped. The bottom of the movable seat (5) has a sliding groove adapted to the main guide rail (61). The movable seat (5) has an installation groove, and the bottom of the installation groove has a connecting hole. The connecting hole is located on both the inner and outer sides of the main guide rail (61). The bearing (62) is connected to the connecting hole. One end of the connecting shaft (63) is connected to the bearing (62), and the other end passes through the movable seat (5). The roller (64) is connected to the end of the connecting shaft (63) that passes through the movable seat (5). The roller (64) rolls against the side wall of the main guide rail (61). The drive motor (65) is installed in the mounting groove. The first bevel gear (66) is connected to the drive shaft of the drive motor (65). The second bevel gear (67) is connected to the end of one of the connecting shafts (63) located in the mounting groove. The first bevel gear (66) and the second bevel gear (67) mesh with each other.

6. A vane profile detection assembly according to claim 5, wherein: An opening is provided on the main guide rail (61), and a secondary guide rail (611) is connected to the worktable (1) by bolts. The secondary guide rail (611) is located inside the opening, and the main guide rail (61) and the secondary guide rail (611) are combined to form a complete circle.

7. A vane profile detection assembly according to claim 1, wherein: An alarm (53) is connected to the movable seat (5), and the alarm (53) is electrically connected to the detection terminal.

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