An integrated measuring device for the diameter of a shaft hole of an impeller and the diameter of an outer circle

Abstract

The application relates to the technical field of impeller detection equipment, in particular to an integrated measuring device for the diameter of an impeller shaft hole and the diameter of an outer circle, which comprises a base plate and a support plate, the support plate is vertically arranged on the base plate, two movable blocks are slidably arranged on the support plate, one clamping rod is arranged on the opposite side wall of each movable block, a fixed block is connected to the movable block, a rebound type displacement sensor is connected to the support plate, a connecting rod is coaxially connected to the probe of the rebound type displacement sensor, the tail end of the probe of the rebound type displacement sensor is connected to one fixed block, the connecting rod is connected to the other fixed block, a measuring head of a pneumatic measuring instrument is arranged on the support plate and located directly above the middle of the two movable blocks, a lifting assembly is arranged between the support plate and the measuring head, and a clamping assembly is arranged on the base plate. The application has the effects of improving the mode that the diameter of the outer circle and the diameter of the shaft hole of the impeller need to be detected twice separately and improving the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of impeller testing equipment, and in particular to an integrated measuring device for the diameter of the impeller shaft hole and the outer diameter. Background Technology

[0002] As a core working component of fluid machinery such as pumps, fans, and compressors, the impeller's structural precision directly determines the equipment's hydrodynamic performance, operational stability, and service life. Among these, the impeller's outer diameter and shaft bore diameter are two key dimensional parameters that require rigorous testing to ensure they meet design requirements.

[0003] In the existing impeller production and inspection process, the inspection of the outer diameter and shaft hole diameter adopts independent operation modes and special tooling.

[0004] When inspecting the outer diameter of an impeller, the impeller is usually clamped and fixed using positioning fixtures such as V-blocks and chucks. Single-point or multi-point measurements are then performed using tools such as outside micrometers, dial indicators, or special outside diameter inspection calipers. When inspecting the diameter of a shaft hole, the outer diameter inspection fixture must be removed first, and then the impeller is transferred to another set of positioning fixtures, such as a shaft hole positioning mandrel or an internal expansion clamp. Measurements are then completed using tools such as inside micrometers, step plug gauges, and inside dial indicators.

[0005] The aforementioned traditional testing methods suffer from drawbacks such as cumbersome operation and low testing efficiency: the two testing processes require separate tooling installation, impeller positioning, tool debugging, and data recording, with repetitive operation steps. Furthermore, the tooling switching and impeller transfer processes consume a significant amount of time, which severely restricts the testing cycle time, especially in mass production scenarios, and cannot meet the demands of efficient production. Utility Model Content

[0006] To improve the efficiency of measuring the impeller's outer diameter and shaft hole diameter, which require separate measurements twice, this application provides an integrated measuring device for the impeller's shaft hole diameter and outer diameter.

[0007] The integrated measuring device for the diameter of the impeller shaft hole and the outer diameter provided in this application adopts the following technical solution: An integrated measuring device for the diameter of an impeller shaft bore and the outer diameter of its outer circle includes a base plate and a support plate. The support plate is vertically mounted on the base plate. Two movable blocks are slidably mounted on the support plate. Each of the two movable blocks has a clamping rod on its opposite sidewall. A fixed block is connected to each movable block. A spring-loaded displacement sensor is connected to the support plate. A connecting rod is coaxially connected to the probe of the spring-loaded displacement sensor. The tail end of the probe of the spring-loaded displacement sensor is connected to one fixed block. The connecting rod is connected to the other fixed block. A probe of a pneumatic measuring instrument is mounted on the support plate. The probe is located directly above the middle of the two movable blocks. A lifting assembly is provided between the support plate and the probe. A clamping assembly for clamping and moving the impeller between the two clamping rods is provided on the base plate.

[0008] Preferably, the support plate is connected to a guide rail, the guide rail is arranged in a horizontal direction, and two sliders are slidably arranged on the guide rail, with each slider corresponding to a movable block.

[0009] Preferably, the guide rail has two positioning blocks corresponding to the slider, the positioning blocks have oblong holes, and the guide rail has several adjusting holes for bolt locking corresponding to the oblong holes. The positioning blocks are adjustablely connected to the guide rail through the oblong holes and bolts, and the positioning blocks abut against the movable blocks to determine the initial distance between the two movable blocks.

[0010] Preferably, an elastic component is provided between the movable block and the base plate. The elastic component includes a mounting block, a guide rod, and a spring. The mounting block is connected to the guide rail and has one mounting block at each end of the guide rail. The guide rod is connected to the mounting block and is arranged in a direction parallel to the guide rail. The movable block has a guide hole for the guide rod to be inserted. The spring is sleeved on the guide rod, with one end of the spring abutting against the movable block and the other end abutting against the mounting block.

[0011] Preferably, the clamping rod is a round rod, and the movable block has a groove for the clamping rod to be inserted. The rod body of the clamping rod is in contact with the outer circle of the impeller, and the clamping rod is tangent to the outer circle of the impeller. The portions of the two clamping rods away from the movable block are inclined in a figure-eight shape.

[0012] Preferably, the lifting assembly is a lifting cylinder, which is vertically connected to the support plate. A first mounting plate is connected to the piston rod of the lifting cylinder, and the probe is connected to the first mounting plate.

[0013] Preferably, the clamping assembly includes a linear module, a second mounting plate, and a three-jaw chuck. The linear module is connected to the base plate, the second mounting plate is connected to the movable seat of the linear module, and the three-jaw chuck is connected to the second mounting plate. The three-jaw chuck is located below the middle of the two movable blocks.

[0014] Preferably, both the rebound displacement sensor and the pneumatic measuring instrument connected to the probe are electrically connected to an external detection system.

[0015] In summary, this application includes the following beneficial technical effects: This utility model provides an integrated measuring device for the diameter of the impeller shaft hole and the outer diameter. The device uses a clamping assembly to move the impeller between two clamping rods. The impeller pushes the movable block, fixed block, and clamping rods to move, and this displacement distance is the distance between the outer diameters of the impeller shaft and the inner diameter of the shaft hole, which can be detected by a spring-loaded displacement sensor. Simultaneously, after the impeller reaches the testing station, a lifting assembly pushes a probe into the impeller shaft hole. An external pneumatic measuring instrument is used to test the impeller shaft hole. The testing process only requires assembling the impeller once, and then the outer diameter of the impeller and the inner diameter of the shaft hole can be measured. This improves the efficiency of the testing process, eliminating the need for two separate measurements of the impeller's outer diameter and shaft hole diameter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the integrated measuring device for the impeller shaft hole diameter and outer diameter in an embodiment of this application; Figure 2 This is a schematic diagram illustrating the positioning block in the embodiments of this application.

[0017] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Support plate; 21. Movable block; 211. Clamping rod; 22. Fixed block; 23. Spring-loaded displacement sensor; 231. Connecting rod; 24. Probe; 25. Guide rail; 251. Slider; 252. Positioning block; 3. Lifting assembly; 31. First mounting plate; 4. Clamping assembly; 41. Linear module; 42. Second mounting plate; 43. Three-jaw chuck; 5. Elastic assembly; 51. Mounting block; 52. Guide rod; 53. Spring. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] This application discloses an integrated measuring device for the diameter of the impeller shaft bore and the outer diameter. (Refer to...) Figure 1 and Figure 2 The integrated measuring device for impeller shaft hole diameter and outer diameter includes a base plate 1 and a support plate 2. The support plate 2 is vertically mounted on the base plate 1. Two movable blocks 21 are slidably mounted on the support plate 2. Each of the two movable blocks 21 has a clamping rod 211 on its opposite sidewall. A fixed block 22 is connected to the movable block 21. A spring-loaded displacement sensor 23 is connected to the support plate 2. A connecting rod 231 is coaxially connected to the probe of the spring-loaded displacement sensor 23. The tail end of the probe of the spring-loaded displacement sensor 23 is connected to one of the fixed blocks 22. The connecting rod 231 is connected to the other fixed block 22. A probe 24 of a pneumatic measuring instrument is mounted on the support plate 2. The probe 24 is located directly above the middle of the two movable blocks 21. A lifting assembly 3 is provided between the support plate 2 and the probe 24. A clamping assembly 4 is provided on the base plate 1 for clamping and moving the impeller between the two clamping rods 211.

[0021] Among them, the pneumatic measuring instrument connected to the rebound displacement sensor 23 and the probe 24 is electrically connected to the external detection system. The detection data is automatically collected, calculated and stored by the external system, eliminating the need for manual recording and conversion, avoiding human error, shortening data processing time and further improving the overall detection cycle.

[0022] A guide rail 25 is connected to the support plate 2. The guide rail 25 is set in the horizontal direction. Two sliders 251 are slidably set on the guide rail 25. The sliders 251 are connected to the movable blocks 21 one by one.

[0023] The guide rail 25 is provided with two positioning blocks 252 corresponding to the slider 251. The positioning blocks 252 are provided with waist-shaped holes. The guide rail 25 is provided with several adjustment holes for bolt locking corresponding to the waist-shaped holes. The positioning blocks 252 are adjustablely connected to the guide rail 25 through the waist-shaped holes and bolts. The positioning blocks 252 abut against the movable blocks 21 to determine the initial distance between the two movable blocks 21.

[0024] An elastic component 5 is provided between the movable block 21 and the base plate 1. The elastic component 5 includes a mounting block 51, a guide rod 52 and a spring 53. The mounting block 51 is connected to the guide rail 25 and has one at each end of the guide rail 25. The guide rod 52 is connected to the mounting block 51 and is arranged in a direction parallel to the guide rail 25. The movable block 21 has a guide hole for the guide rod 52 to be inserted. The spring 53 is sleeved on the guide rod 52. One end of the spring 53 abuts against the movable block 21 and the other end abuts against the mounting block 51.

[0025] The elastic component 5 ensures that the clamping rod 211 always fits against the outer circle of the impeller and ensures that the impeller shaft hole and the probe 24 axis are collinear, resulting in small positioning error.

[0026] The initial distance between the two movable blocks 21 can be flexibly adjusted by the positioning block 252. Combined with the extension range of the spring 53 of the elastic component 5, it can adapt to impellers with different outer diameters.

[0027] The clamping rod 211 is a round rod. The movable block 21 has a groove for the clamping rod 211 to be inserted. The rod body of the clamping rod 211 is in contact with the outer circle of the impeller. The clamping rod 211 is tangent to the outer circle of the impeller. The parts of the two clamping rods 211 that are away from the movable block 21 are inclined in a figure-eight shape.

[0028] The clamping rod 211 is set as a round rod to reduce the contact area with the outer circle of the impeller and avoid the clamping rod 211 scratching the impeller. The part of the clamping rod 211 away from the movable block 21 is set as an "eight" shape, which has a guiding effect on the impeller and makes it easier for the impeller to move between the two clamping rods 211.

[0029] The lifting assembly 3 is a lifting cylinder, which is vertically connected to the support plate 2. The piston rod of the lifting cylinder is connected to the first mounting plate 31, and the probe 24 is connected to the first mounting plate 31.

[0030] The clamping assembly 4 includes a linear module 41, a second mounting plate 42, and a three-jaw chuck 43. The linear module 41 is connected to the base plate 1, the second mounting plate 42 is connected to the movable seat of the linear module 41, and the three-jaw chuck 43 is connected to the second mounting plate 42. The three-jaw chuck 43 is located below the middle of the two movable blocks 21.

[0031] The implementation principle of the integrated measuring device for impeller shaft hole diameter and outer diameter in this application embodiment is as follows: 1. Equipment preparation and initial calibration Check the status of each component of the device: ensure that the pneumatic / electrical connections of the linear module 41, lifting cylinder, and three-jaw chuck 43 are normal, the sensitivity of the spring-loaded displacement sensor 23 and the pneumatic measuring instrument probe 24 meets the standard, and that they all communicate normally with the external detection system; ensure that the guide rail 25 and slider 251 slide smoothly, that the spring 53 of the elastic component 5 is not deformed, and that the clamping rod 211 is not worn or bent.

[0032] Initial spacing adjustment: Based on the outer diameter range of the impeller to be tested, loosen the bolts on the positioning block 252, move the positioning block 252 along the guide rail 25, adjust the initial spacing between the two movable blocks 21, and leave space for the impeller to enter. After the adjustment is completed, tighten the bolts to fix the positioning block 252 and ensure that the initial position of the movable block 21 is stable.

[0033] Zero-point calibration: Start the external detection system and adjust the spring-loaded displacement sensor 23 to zero.

[0034] 2. Impeller clamping and transfer positioning The operator places the impeller to be tested in the clamping area of ​​the three-jaw chuck 43, adjusts the impeller's posture so that the boss at the bottom of the impeller is aligned with the center of the three-jaw chuck 43, and starts the three-jaw chuck 43 to clamp the boss.

[0035] When the linear module 41 is started, its movable seat drives the second mounting plate 42, the three-jaw chuck 43 and the clamped impeller to move horizontally and move between the two clamping rods 211. Since the part of the two clamping rods 211 away from the movable block 21 is inclined in a figure-eight shape, the impeller is guided to the middle position of the two clamping rods 211 during the transfer process, and the initial positioning is achieved.

[0036] The linear module 41 continuously drives the impeller to move. The outer circle of the impeller is tangent to the rods of the two clamping rods 211 and pushes the movable block 21 to move to both sides along the guide rail 25. The movable block 21 compresses the spring 53 of the elastic component 5. The spring 53 provides a counterforce, so that the clamping rods 211 always fit against the outer circle of the impeller. Until the impeller moves to the preset position, at which point the impeller shaft hole is collinear with the axis of the probe 24, the linear module 41 stops running, and the precise positioning of the impeller is completed.

[0037] 3. Impeller outer diameter inspection During the movement of the movable block 21, it drives the fixed blocks 22 on both sides to move synchronously: one fixed block 22 pushes the probe of the spring-loaded displacement sensor 23, and the other fixed block 22 pulls the connecting rod 231, so that the probe of the spring-loaded displacement sensor 23 generates a displacement corresponding to the outer diameter of the impeller.

[0038] The spring-loaded displacement sensor 23 converts mechanical displacement into electrical signals and transmits them to an external detection system in real time. The system automatically calculates the outer diameter of the impeller based on preset calibration parameters, stores the detection data, and completes the outer diameter detection.

[0039] 4. Impeller shaft bore diameter inspection After the outer diameter is measured, the lifting cylinder is activated, and its piston rod drives the first mounting plate 31 and the probe 24 of the pneumatic measuring instrument to descend vertically. The probe 24 is then precisely inserted into the shaft hole of the impeller.

[0040] The pneumatic measuring instrument detects the clearance change of the inner wall of the shaft hole through the probe 24, converts the air pressure signal into shaft hole diameter data, and transmits it to the external detection system. The system automatically records and analyzes whether the shaft hole diameter meets the design requirements, thus completing the shaft hole diameter detection.

[0041] 5. Testing completed After the shaft hole diameter is detected, the lifting cylinder drives the probe 24 to rise and reset, disengaging from the impeller shaft hole; the linear module 41 drives the three-jaw chuck 43 to move in the opposite direction and reset to the initial material picking position. The three-jaw chuck 43 releases the impeller boss, and the operator can manually remove the detected impeller.

[0042] 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. An integrated measuring device for the diameter of an impeller shaft hole and the outer diameter, comprising a base plate (1) and a support plate (2), wherein the support plate (2) is vertically disposed on the base plate (1), characterized in that: Two movable blocks (21) are slidably arranged on the support plate (2). A clamping rod (211) is provided on the opposite side wall of the two movable blocks (21). A fixed block (22) is connected to the movable block (21). A spring-loaded displacement sensor (23) is connected to the support plate (2). A connecting rod (231) is coaxially connected to the probe of the spring-loaded displacement sensor (23). The tail end of the probe of the spring-loaded displacement sensor (23) is connected to a fixed block (22). The connecting rod (231) is connected to another fixed block (22). A probe (24) of a pneumatic measuring instrument is provided on the support plate (2). The probe (24) is located directly above the middle of the two movable blocks (21). A lifting assembly (3) is provided between the support plate (2) and the probe (24). A clamping assembly (4) is provided on the base plate (1) for clamping and moving the impeller between the two clamping rods (211).

2. The integrated measuring device for the impeller shaft hole diameter and outer diameter according to claim 1, characterized in that: The support plate (2) is connected to a guide rail (25), which is set in a horizontal direction. Two sliders (251) are slidably arranged on the guide rail (25), and the sliders (251) are connected to the movable block (21) one by one.

3. The integrated measuring device for the impeller shaft hole diameter and outer diameter according to claim 2, characterized in that: The guide rail (25) is provided with two positioning blocks (252) corresponding to the slider (251). The positioning blocks (252) are provided with waist-shaped holes. The guide rail (25) is provided with several adjustment holes for bolt locking corresponding to the waist-shaped holes. The positioning blocks (252) are adjustablely connected to the guide rail (25) through the waist-shaped holes and bolts. The positioning blocks (252) abut against the movable blocks (21) to determine the initial distance between the two movable blocks (21).

4. The integrated measuring device for the impeller shaft hole diameter and outer diameter according to claim 3, characterized in that: An elastic component (5) is provided between the movable block (21) and the base plate (1). The elastic component (5) includes a mounting block (51), a guide rod (52), and a spring (53). The mounting block (51) is connected to the guide rail (25). The mounting block (51) is provided at both ends of the guide rail (25). The guide rod (52) is connected to the mounting block (51) and is arranged in a direction parallel to the guide rail (25). The movable block (21) has a guide hole for the guide rod (52) to be inserted. The spring (53) is sleeved on the guide rod (52). One end of the spring (53) abuts against the movable block (21), and the other end abuts against the mounting block (51).

5. The integrated measuring device for the impeller shaft hole diameter and outer diameter according to claim 1, characterized in that: The clamping rod (211) is a round rod. The movable block (21) has a groove for the clamping rod (211) to be inserted. The rod body of the clamping rod (211) is in contact with the outer circle of the impeller. The clamping rod (211) is tangent to the outer circle of the impeller. The two clamping rods (211) are inclined in a figure-eight shape away from the movable block (21).

6. The integrated measuring device for the impeller shaft hole diameter and outer diameter according to claim 1, characterized in that: The lifting assembly (3) is a lifting cylinder, which is vertically connected to the support plate (2). A first mounting plate (31) is connected to the piston rod of the lifting cylinder, and the probe (24) is connected to the first mounting plate (31).

7. The integrated measuring device for the impeller shaft hole diameter and outer diameter according to claim 1, characterized in that: The clamping assembly (4) includes a linear module (41), a second mounting plate (42), and a three-jaw chuck (43). The linear module (41) is connected to the base plate (1), the second mounting plate (42) is connected to the movable seat of the linear module (41), and the three-jaw chuck (43) is connected to the second mounting plate (42). The three-jaw chuck (43) is located below the middle of the two movable blocks (21).

8. The integrated measuring device for the impeller shaft hole diameter and outer diameter according to claim 1, characterized in that: The pneumatic measuring instrument connected to the rebound displacement sensor (23) and the probe (24) is electrically connected to an external detection system.

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