A balancing test device for a single-end supported motor rotor
The balance test device for a single-end supported motor rotor is simplified by using a cylinder assembly and a floating mechanism, which solves the problems of complex structure and low precision, and realizes high-precision rotor balance test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 上海衡望智能科技有限公司
- Filing Date
- 2023-01-10
- Publication Date
- 2026-07-14
AI Technical Summary
Existing balance testing devices for single-end supported motor rotors have complex structures, affecting measurement accuracy and reliability. They also have high requirements for rotor end face parallelism, which increases costs.
The system employs a cylinder assembly and a floating mechanism. The cylinder assembly and sensors on the floating mechanism are used to adjust the rotor support clamping, simplifying the mechanical structure. The balance of the rotor is detected by the floating mechanism and sensors.
It improves measurement accuracy, reduces the requirements for rotor end face parallelism, simplifies the mechanical structure, and reduces costs.
Smart Images
Figure CN116202687B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a rotor testing device, and more particularly to a balance testing device for a single-end supported motor rotor. Background Technology
[0002] Due to factors such as uneven material composition, manufacturing errors, uneven deformation of rotor blades, uneven wear, or localized chipping, an imbalance always exists on the rotor. This imbalance causes rotor vibration, accelerates the wear of components such as bearings and shaft seals, and reduces the machine's service life and efficiency. Therefore, dynamic balancing of the rotor is necessary during engine manufacturing, maintenance, and even operation.
[0003] Traditional motor rotor balancing tests mostly use horizontal balancing machines. For rotors supported at one end, the horizontal measurement scheme is similar to a cantilever, requiring the mechanical structure to balance the rotor's own weight while ensuring the accurate transmission of unbalanced forces. The general practice is to place the rotor in a designated position, with a lifting mechanism restricting the rotor's downward radial degree of freedom. Roller assemblies at both ends, under the action of cylinders or lead screws, clamp the rotor axially, and the lifting mechanism moves down, tensioning the belt, which then drives the rotor to complete the test.
[0004] Existing measuring devices and methods require mechanical lifting mechanisms to restrict the radial movement of the rotor during actual operation. This increases the number of components such as cylinders (motors, lead screws), and sensors that are compatible with the structure, making the structure complex, affecting the measurement accuracy, reducing reliability, and increasing manufacturing and maintenance costs. During testing, the two end faces of the motor rotor are in direct contact with the clamping mechanism, so the requirements for the parallelism error of the two end faces of the workpiece being measured are very high, which reduces the measurement accuracy and versatility of the machine. Summary of the Invention
[0005] To address the problems existing in the background art, the present invention provides a balance measurement device for a single-end supported motor rotor. The present invention reduces the impact of gravity on accuracy during rotor measurement, lowers the parallelism requirements of the rotor end faces, and improves accuracy; it also simplifies unnecessary mechanical structures, increases machine reliability, and reduces costs.
[0006] The technical solution adopted in this invention is:
[0007] The present invention includes a cylinder assembly, a floating mechanism, and a sensor; the rotor is supported and clamped on the floating mechanism, the floating mechanism is equipped with a cylinder assembly for adjusting the rotor support and clamping, and the floating mechanism is provided with a sensor for rotor balance testing on its side.
[0008] The floating mechanism includes a spring plate, a spring, a spring mounting plate, a floating platform base plate, and a movable bearing mounting block. The spring mounting plate is fixed, and the floating platform base plate is elastically and floatingly supported on the spring mounting plate via the spring. The movable bearing mounting block is horizontally and slidably mounted on the floating platform base plate via a guide rail slider structure. A cylinder assembly is installed on the side of the floating platform base plate, and the cylinder assembly is connected to the movable bearing mounting block. A sensor is installed on the spring mounting plate, and the sensor is connected to the bottom surface of the floating platform base plate. Both the floating platform base plate and the movable bearing mounting block are equipped with a first bearing component for horizontally radially supporting and clamping the rotor. A second bearing component for vertically and axially supporting and clamping the rotor is also installed on the floating platform base plate.
[0009] The floating platform bottom plate is equipped with two first bearing components, and each movable bearing mounting block is equipped with a first bearing component, and the three first bearing components are arranged in a triangular pattern; a second bearing component is also installed on the floating platform bottom plate, and the second bearing component is located in the middle between the three first bearing components.
[0010] The first bearing component includes a bearing, a roller shaft, and a first mounting block; the first mounting block is fixed on the floating platform base plate / movable bearing mounting block, and the roller shaft is arranged axially in the vertical direction at the center of the first mounting block. The bearing is positioned and installed at the upper end of the roller shaft, and the bearing is arranged axially in the vertical direction.
[0011] The second bearing component includes a second mounting block and a shaft end limit bearing hinged to the second mounting block. The first mounting block is fixed to the bottom plate of the floating platform, and the shaft end limit bearing is arranged horizontally in the axial direction.
[0012] The sensor is mounted on one side of the reed mounting plate. The upper end of the spring rod mounting base is fixed to the bottom plate of the floating platform. One end of the spring rod is fixed to the lower end of the spring rod mounting base by the spring rod clamping block, and the other end of the spring rod is connected to the detection end of the sensor.
[0013] The floating platform base plate is located directly above the spring plate mounting plate, and the four corners of the floating platform base plate are connected to the four corners of the spring plate mounting plate by vertically arranged springs.
[0014] The cylinder assembly includes a cylinder, which is mounted on a cylinder connecting block on the bottom side of the floating platform base plate via a cylinder pad. The cylinder rod is horizontally parallel to the guide rail of the guide rail slider structure and is fixedly connected to the bottom of the movable bearing mounting block.
[0015] The sensor in question is a vibration sensor.
[0016] The beneficial effects of this invention are:
[0017] The device of the present invention simplifies the mechanical structure. Only one set of shaft end limiting bearings is needed to provide axial support for the rotor. Together with the movable bearing block driven by the cylinder, it achieves stable clamping, which improves measurement accuracy, reduces measurement error, and saves costs. Attached Figure Description
[0018] Figure 1 This is a perspective view of the measuring device of the present invention.
[0019] Figure 2 This is an exploded view of the measuring device of the present invention.
[0020] Figure 3 This is a schematic diagram of the measuring device of the present invention.
[0021] Figure 4 This is one of the schematic diagrams of the single-end supported motor rotor structure of the present invention.
[0022] Figure 5 This is the second schematic diagram of the single-end supported motor rotor structure of the present invention.
[0023] Figure 6 This is a schematic diagram of the workpiece support method of the present invention.
[0024] In the diagram, A1 is the bearing, A2 is the roller shaft, A3 is the ultra-thin head hex screw, A4 is the first mounting block, A5 is the shaft end limit bearing, A6 is the sensor, A7 is the movable bearing mounting block, A8 is the spring plate, A9 is the spring, A10 is the spring mounting plate, A11 is the sensor mounting base, A12 is the spring rod clamping block, A13 is the spring rod mounting base, A14 is the spring rod, A15 is the floating platform base plate, and A16 is the cylinder connecting block.
[0025] B0, cylinder; B1, cylinder head gasket; C0, rotor. Detailed Implementation
[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] like Figures 1-3 As shown, the device includes a cylinder assembly, a floating mechanism, and a sensor A6; the rotor C0 is supported and clamped on the floating mechanism, which is equipped with a cylinder assembly for floating adjustment of the rotor C0 support and clamping, and a sensor A6 for rotor C0 balance testing is provided on the side of the floating mechanism.
[0028] The bottom of rotor C0 is mounted on a floating mechanism. Rotor C0 is connected to an external drive source via a belt and is driven to rotate around its own central axis to perform a balance test.
[0029] like Figure 4 and Figure 5As shown, the floating mechanism includes a spring plate A8, a spring A9, a spring mounting plate A10, a floating platform base plate A15, and a movable bearing mounting block A7. The spring mounting plate A10 is fixed, and the floating platform base plate A15 is elastically and floatingly supported on the spring mounting plate A10 via the spring A9. The movable bearing mounting block A7 is horizontally and slidably mounted on the floating platform base plate A15 via a guide rail slider structure. A cylinder assembly is mounted on the side of the floating platform base plate A15, and the cylinder assembly is connected to the movable bearing mounting block A7. The sensor A6 is mounted on the spring mounting plate A10 via a sensor mounting seat A11, and the sensor A6 is connected to the bottom surface of the floating platform base plate A15. Both the floating platform base plate A15 and the movable bearing mounting block A7 are equipped with first bearing components for horizontal radial support and clamping of the rotor C0. The floating platform base plate A15 is also equipped with second bearing components for vertical axial support and clamping of the rotor C0.
[0030] Two first bearing components are installed on the bottom plate A15 of the floating platform, and one first bearing component is installed on each of the movable bearing mounting blocks A7. A third first bearing component moves horizontally with the movable bearing mounting block A7. The three first bearing components are arranged in a triangle, that is, they are located at the three corners of the triangle. A second bearing component is also installed on the bottom plate A15 of the floating platform, and the second bearing component is located in the middle between the three first bearing components.
[0031] The first bearing component includes a bearing A1, a roller shaft A2, and a first mounting block A4. The first mounting block is fixed on the floating platform base plate A15 / movable bearing mounting block A7. The roller shaft A2 is axially arranged vertically along the top and bottom of the first mounting block. The bearing A1 is axially positioned and mounted on the upper end of the roller shaft A2 by ultra-thin head hexagonal screws A3. The bearing A1 is axially arranged vertically. Figure 6 As shown, bearing A1 is rolled to the circumferential surface at the bottom end of rotor C0.
[0032] The floating platform base plate A15 is also equipped with a cylinder connecting block A16 and a first mounting block A4. The roller shaft A2 is vertically and axially mounted in the first mounting block. The bearing A1 is installed and tightened with an ultra-thin head hexagon screw A3. The cylinder connecting block A16 is used to install the cylinder B0.
[0033] The second bearing component includes a second mounting block and a shaft end limiting bearing A5 mounted on the second mounting block. The first mounting block is fixed on the floating platform base plate A15. The shaft end limiting bearing A5 is arranged horizontally in the axial direction. Figure 6 As shown, the shaft end limit bearing A5 is rolled to the bottom surface of the rotor C0.
[0034] Sensor A6 is mounted on one side of spring mounting plate A10 via sensor mounting base A11. The upper end of spring rod mounting base A13 is fixed to the bottom plate of floating platform A15. One end of spring rod A14 is fixed to the lower end of spring rod mounting base A13 via spring rod clamping block A12. The other end of spring rod A14 is connected to the detection end of sensor A6.
[0035] The floating platform base plate A15 is located directly above the spring mounting plate A10. The four corners of the floating platform base plate A15 are connected to the four corners of the spring mounting plate A10 by vertically arranged springs A9. The upper and lower ends of the spring A are fixedly connected to the floating platform base plate A15 and the spring mounting plate A10 by spring pressure plates A8, respectively.
[0036] A spring A9 is vertically installed on each of the four sides of the spring mounting plate A10, and it is connected to the floating platform base plate A15 by eight spring pressure plates A8.
[0037] The cylinder assembly includes cylinder B0, which is fixedly mounted on the cylinder connecting block A16 on the bottom side of the floating platform base plate A15 via cylinder gasket B1. The cylinder rod of cylinder B0 is horizontally parallel to the guide rail of the guide rail slider structure and is fixedly connected to the bottom of the movable bearing mounting block A7.
[0038] In practice, sensor A6 is a vibration sensor.
[0039] The device of the present invention performs a balance test according to the following process:
[0040] The bottom end of rotor C0 is installed between the two first bearing components of the floating platform bottom plate A15 and the first bearing component of the movable bearing mounting block A7, and the bottom surface of rotor C0 is supported by the shaft end limiting bearing A5.
[0041] During measurement, cylinder B0 drives the movable bearing mounting block A7 to move horizontally towards rotor C0 along the guide rail within a fixed stroke, thereby pressing the bearing A1 of one of the first bearing components on itself against the circumferential surface of the bottom end of rotor C0, thus clamping rotor C0 between the bearings A1 of the three first bearing components, restricting the radial displacement of the rotor C0 being measured.
[0042] Meanwhile, the shaft end limiting bearing A5 contacts the bottom surface of the rotor C0, and under the action of the rotor C0's own weight, it can also limit the axial displacement of the rotor to achieve stable clamping. The circumferential surface and bottom surface of the rotor C0 are supported at the same time, which simplifies the mechanical structure and improves the measurement accuracy compared with horizontal measurement.
[0043] An external drive source drives the rotor C0 to rotate. During the rotation, the vibration of the rotor C0 is transmitted to the floating platform base plate A15 through the bearing, and then to the sensor A6 through the spring rod mounting seat A13 and the spring rod A14 in sequence. The sensor A6 detects and collects the vibration, which can be further fed back to control the cylinder.
Claims
1. A balance testing device for a single-end supported motor rotor, characterized in that: It includes a cylinder assembly, a floating mechanism, and a sensor (A6); the rotor (C0) is supported and clamped on the floating mechanism, which is equipped with a cylinder assembly for adjusting the support and clamping of the rotor (C0), and a sensor (A6) for testing the balance of the rotor (C0) is provided on the side of the floating mechanism. The floating mechanism includes a spring plate (A8), a spring (A9), a spring mounting plate (A10), a floating platform base plate (A15), and a movable bearing mounting block (A7). The spring mounting plate (A10) is fixed, and the floating platform base plate (A15) is elastically and floatingly supported on the spring mounting plate (A10) via the spring (A9). The movable bearing mounting block (A7) is horizontally and slidably mounted on the floating platform base plate (A15) via a guide rail slider structure. A cylinder assembly is installed on the side, and the cylinder assembly is connected to the movable bearing mounting block (A7). The sensor (A6) is installed on the reed mounting plate (A10). The sensor (A6) is connected to the bottom surface of the floating platform base plate (A15). The first bearing component for horizontal radial support of the clamping rotor (C0) is installed on both the floating platform base plate (A15) and the movable bearing mounting block (A7). The second bearing component for vertical axial support of the clamping rotor (C0) is also installed on the floating platform base plate (A15). Two first bearing components are installed on the floating platform bottom plate (A15), and one first bearing component is installed on each of the movable bearing mounting blocks (A7). The three first bearing components are arranged in a triangular pattern. A second bearing component is also installed on the floating platform bottom plate (A15), and the second bearing component is located in the middle between the three first bearing components.
2. The balance testing device for a single-end supported motor rotor according to claim 1, characterized in that: The first bearing component includes a bearing (A1), a roller shaft (A2), and a first mounting block (A4); the first mounting block is fixed on the floating platform base plate (A15) / movable bearing mounting block (A7), the roller shaft (A2) is arranged axially in the vertical direction at the center of the first mounting block, the bearing (A1) is positioned and installed at the upper end of the roller shaft (A2), and the bearing (A1) is arranged axially in the vertical direction.
3. The balance testing device for a single-end supported motor rotor according to claim 1, characterized in that: The second bearing component includes a second mounting block and a shaft end limit bearing (A5) mounted on the second mounting block. The first mounting block is fixed on the floating platform base plate (A15), and the shaft end limit bearing (A5) is arranged horizontally in the axial direction.
4. The balance testing device for a single-end supported motor rotor according to claim 1, characterized in that: The sensor (A6) is mounted on one side of the reed mounting plate (A10), the upper end of the spring rod mounting seat (A13) is fixed to the bottom plate of the floating platform (A15), one end of the spring rod (A14) is fixed to the lower end of the spring rod mounting seat (A13) through the spring rod clamping block (A12), and the other end of the spring rod (A14) is connected to the detection end of the sensor (A6).
5. The balance testing device for a single-end supported motor rotor according to claim 1, characterized in that: The floating platform base plate (A15) is located directly above the spring plate mounting plate (A10), and the four corners of the floating platform base plate (A15) are connected to the four corners of the spring plate mounting plate (A10) by vertically arranged springs (A9).
6. The balance testing device for a single-end supported motor rotor according to claim 1, characterized in that: The cylinder assembly includes a cylinder (B0), which is mounted on a cylinder connecting block (A16) on the bottom side of the floating platform base plate (A15) via a cylinder gasket (B1). The cylinder rod of the cylinder (B0) is horizontally parallel to the guide rail of the guide rail slider structure and is fixedly connected to the bottom of the movable bearing mounting block (A7).
7. The balance testing device for a single-end supported motor rotor according to claim 1, characterized in that: The sensor (A6) is a vibration sensor.