Rotor balance degree detection device of duplex harvester motor

Abstract

The invention relates to the technical field of rotor detection, in particular to a rotor balance degree detection device of a duplex harvester motor, which comprises a base, clamping supports for placing a rotor are fixedly arranged on the front side and the rear side of the top of the base, and two rolling bearings for bearing a rotating shaft of the rotor and a detector for detecting the balance degree of the rotor are arranged on the clamping supports. According to the rotor balance degree detection device of the duplex harvester motor, a belt is dynamically attached to the surface of a rotor along a spiral track in cooperation with an elastic release mechanism of a tensioning wheel in the process that a lifting platform drives a belt frame to press downwards through a spiral attachment transmission and dynamic contact enhancement technology, a contact area in continuous gradient distribution is formed, and compared with traditional single-point contact, the detection efficiency is greatly improved. According to the design, the contact area is increased, the friction coefficient fluctuation is reduced, the transmission slip phenomenon is effectively inhibited, the torque transmission stability is improved, the rotating speed fluctuation control is obvious, and the signal-to-noise ratio of data collected by the detector is obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor detection, and specifically to a rotor balance detection device for a double - link harvester motor. Background Technique

[0002] As the core power equipment of modern agricultural machinery, the rotor of the motor of a double - link harvester needs to maintain dynamic balance under high - speed, high - load and complex vibration conditions. Traditional balance detection technologies are mostly designed for industrial motors, using fixed support structures and single - point contact drive methods. Existing detection devices generally have the following technical defects: Insufficient stability of contact drive: Traditional belt drives rely on linear wrap - angle contact. When there are slight eccentricities or wear on the rotor surface, it is easy to cause belt slippage, resulting in distorted detection data. Weak ability to suppress lateral runout: Conventional roller restraint mechanisms can only provide unilateral limit. The lateral centrifugal force generated when the rotor rotates at high speed will cause resonance of the detection tooling, and the measurement error will increase. Lack of safety protection mechanism: During the detection process, when the belt breaks or the rotor disengages, there is no active braking and mechanical locking function, posing risks of equipment damage and personal safety.

[0003] With the development of intelligent harvesters towards high power and lightweight, the problem of excessive vibration of the whole machine caused by uneven mass distribution of the rotor has become increasingly prominent. The industry urgently needs a detection solution with the following characteristics: High - robustness drive: Adapt to changes in rotor diameter tolerance and surface topography, and maintain high transmission efficiency at a certain linear speed. Multi - dimensional dynamic constraint: Simultaneously suppress radial runout and axial movement. Failure - safe redundancy: In case of sudden overload or structural failure, achieve mechanical self - locking and energy dissipation. Based on the above background, this patent proposes a rotor balance detection device dedicated to the motor of a double - link harvester. Through three core technologies: "closed - loop spiral - trajectory drive", "pneumatic - mechanical dual - mode locking", and "eccentric self - locking emergency braking", it overcomes the adaptability bottleneck of traditional equipment in complex agricultural working conditions, providing underlying technical support for improving the reliability and intelligent detection of harvester motors. Summary of the Invention

[0004] The object of the present invention is to provide a rotor balance detection device for a double - joint harvester motor to solve the problems of insufficient contact drive stability, weak lateral jump suppression ability, and lack of safety protection mechanism proposed in the above - mentioned background technology. To achieve the above object, the present invention provides the following technical solutions: A rotor balance detection device for a double - joint harvester motor, including a base, on both the front and rear sides of the top of the base, there are fixedly arranged holders for placing the rotor, and on the holders, there are two rolling bearings for receiving the rotor shaft and a detector for detecting the rotor balance.

[0005] On the left and right sides of the top of the base, there are fixedly arranged brackets with lifting functions. The two brackets are connected by a cross - beam. A lifting platform is slidably arranged on the brackets, and a belt rack is fixedly installed between the lifting platforms.

[0006] Inside the belt rack, there are three belt pulleys rotatably arranged. A belt for driving the rotor is sleeved on the three belt pulleys. On the belt rack, there is a motor for driving the belt pulley and a tensioning wheel for adjusting the belt tension. When the lifting platform drives the belt rack to move downward, the belt spirally fits the surface of the rotor.

[0007] On the side surface of the belt rack, there are two tube seats arranged in a front - rear offset manner. The bottom of the tube seat is movably inserted with a sliding column. The sliding column is linked with a sliding frame through an inclined rail. When the sliding column moves upward, it pushes the sliding frame to displace horizontally.

[0008] At the end of the sliding frame, there is a roller cooperating with the belt. When the two rollers displace relative to each other, the belt is wound into a closed - loop ring to restrict the lateral jump of the rotor.

[0009] Preferably, a through - hole is opened at one end of the roller relative to the rotor. Inside the through - hole, there is a tubular caliper slidably connected. Inside the through - hole, there is a tension spring for pulling the inner slide of the caliper. Inside the caliper, there is a shaftless fan blade fixedly arranged.

[0010] When the roller is driven by the belt to rotate, the shaftless fan blade pushes the caliper to pop out through the airflow, and the two calipers are relatively clamped to lock the two rollers and the sliding frame on both sides.

[0011] Preferably, a horizontal shaft is fixed on the side surface of the sliding frame. A chute is opened at one end of the roller relative to the horizontal shaft. Inside the chute, there is a shaft seat slidably connected. The shaft seat is rotatably connected to the horizontal shaft, and there is a top spring inside the chute.

[0012] When the belt reaction force squeezes the roller, the axis of the roller is coaxial with the axis of the horizontal shaft. After the belt breaks, the top spring pushes the axis of the roller to be misaligned and eccentrically rotates to squeeze and fix the belt.

[0013] Preferably, the tensioning wheel is connected to the belt rack through a spring tensioning structure, and the spring tensioning structure is used to adjust the position of the tensioning wheel along the belt transmission direction.

[0014] Preferably, the detector includes a vibration sensor and a rotation speed sensor, and the vibration sensor and the rotation speed sensor are connected to an external controller via a data line.

[0015] Preferably, the lifting function of the bracket is realized by a hydraulic cylinder, and the surface of the bracket is provided with scale lines for marking the lifting stroke.

[0016] Preferably, a guide rail is provided between the pipe seat and the slide column.

[0017] Preferably, a buffer pad is embedded in the inner wall of the slide groove, a friction-reducing coating is coated on the surface of the shaft seat, and a dust-proof sleeve is sleeved on the outer side of the top spring.

[0018] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, through spiral fitting transmission and dynamic contact enhancement technology, during the downward pressing process of the lifting platform driving the belt frame, the elastic release mechanism of the tensioning wheel is cooperated to make the belt dynamically fit the rotor surface along a spiral trajectory to form a contact area with a continuous gradient distribution. Compared with traditional single-point contact, this design increases the contact area, reduces the fluctuation of the friction coefficient, effectively suppresses the transmission slippage, improves the torque transmission stability, significantly controls the speed fluctuation, and significantly improves the signal-to-noise ratio of the data collected by the detector.

[0019] In the present invention, a double closed-loop constraint adaptive balancing system is used, a front-to-rear staggered arrangement of a pipe seat and a sliding column linkage mechanism is adopted, and the vertical displacement is converted into a horizontal displacement through the inclined rail-bump 19 mechanical pair, and the double-sided rollers are driven to realize a closed-loop belt structure. When the belt forms a closed-loop enveloping rotor, the contact width is expanded to 2.8 times that of the traditional structure, generating a radial constraint force field. This structure can compress the lateral runout of the rotor, and at the same time compensate for the rotor diameter tolerance through the self-adjusting function of the roller, thereby ensuring the full-range adaptability of rotors of different specifications.

[0020] In the present invention, a failure-safe double locking protection system is adopted and an innovative pneumatic-mechanical hybrid locking mechanism is integrated. During normal operation, the airflow thrust of the shaftless fan blades overcomes the resistance of the tension spring, so that the caliper forms an interlocking structure to prevent the displacement deviation of the roller. When the belt breaks, the top spring pushes the roller axis and the horizontal axis to produce an angle, triggering the eccentric spin of the roller and forming a wedge-shaped friction pair with the base, thereby achieving full-area braking of the moving parts. This mechanism can withstand a kinetic energy impact of 200J, limiting the displacement of the broken belt within a safe range of 10cm, while keeping the rotor displacement less than 2mm, thereby constructing a dual safety guarantee of active protection and passive emergency response. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A top view of the present invention; Figure 3Schematic structural diagram of the belt rack and belt of the present invention; Figure 4 Schematic structural diagram of the belt rack and pulley of the present invention; Figure 5 Schematic structural diagram of the pipe seat and sliding rack of the present invention; Figure 6 Schematic cross-sectional view of the three-dimensional structure of the pipe rack of the present invention; Figure 7 Schematic cross-sectional view of the three-dimensional structure of the drum of the present invention; Figure 8 Schematic cross-sectional view of the horizontal axis, shaft seat and drum of the present invention; Figure 9 Schematic structural diagram of the drum and shaftless fan blade of the present invention; Figure 10 Schematic diagram of the belt winding around the rotor of the present invention.

[0022] In the figure: 1, base; 2, clamping bracket; 3, rolling bearing; 4, detector; 5, bracket; 6, cross beam; 7, lifting platform; 8, belt rack; 9, pulley; 10, belt; 11, motor; 12, tensioning pulley; 13, pipe seat; 14, sliding column; 15, inner through groove; 16, outer through groove; 17, sliding rack; 18, inclined rail; 19, convex block; 20, drum; 21, through hole; 22, caliper; 23, tension spring; 24, shaftless fan blade; 25, horizontal axis; 26, sliding groove; 27, shaft seat; 28, top spring. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a rotor balance detection device for a double - type harvester motor, including a base 1, on both the front and rear sides of the top of the base 1, clamping brackets 2 for placing the rotor are fixedly provided, two rolling bearings 3 for receiving the rotor shaft are provided on the clamping bracket 2, and a detector 4 for detecting the rotational balance of the rotor is provided on the clamping bracket 2.

[0025] Brackets 5 with lifting functions are fixedly arranged on the left and right sides of the top of the base 1. The tops of the two brackets 5 are connected by a single crossbeam 6, and a lifting platform 7 for lifting is slidingly arranged on the outside of the bracket 5. The bracket 5 adopts a two-stage hydraulic cylinder with a linear guide rail. Redundant guide columns are arranged on both sides of the lifting platform 7. An anti-shake damping module is added in the middle section of the lifting stroke. The hydraulic system has a built-in pressure compensation valve to prevent the double brackets from lifting asynchronously. A belt rack 8 is fixedly arranged between the two lifting platforms 7.

[0026] The belt frame 8 is internally rotated with three pulleys 9, on which a belt 10 for driving a rotor is sleeved, and the belt frame 8 is provided with a motor 11 for driving the pulleys 9. The belt frame 8 is provided with a tensioning wheel 12 matched with the belt 10, and the tensioning wheel 12 has a built-in pressure sensor, and a spring tensioning structure is integrated with a micro servo motor. The tension of the belt 10 is dynamically adjusted through a PID algorithm, and the tension value is fed back to the controller in real time to ensure stable belt transmission efficiency at different speeds.

[0027] When the lifting platform 7 drives the belt frame 8 to move downward, the belt 10 is pressed down on the rotor. After being released by the tensioning wheel 12, the relatively inclined belt 10 adheres to the rotor surface along a spiral trajectory, thereby increasing the contact area between the belt 10 and the rotor and improving the transmission stability. When the belt frame 8 descends, the tensioning wheel 12 releases the belt length and cooperates with the lateral displacement of the roller 20 to make the belt 10 cover the rotor surface with a spiral angle of 15°-25°, and the contact area is increased by 40%.

[0028] Two tube seats 13 are fixedly provided on the side surface of the belt frame 8, and the two tube seats 13 are staggered front and back along the two ends of the belt frame 8. The tube seats 13 are set as hollow structures. A sliding column 14 is movably inserted at the bottom of the tube seat 13, and an inner through groove 15 is provided on the side surface of the sliding column 14. An outer through groove 16 connected to the inner through groove 15 is provided on the side surface of the tube seat 13, and a slide 17 is slidably connected in the outer through groove 16 and the inner through groove 15. An inclined rail 18 is fixedly connected to the side surface of the slide 17, and a protrusion 19 matching the inclined rail 18 is fixedly provided on the inner side wall of the inner through groove 15. When the sliding column 14 drives the protrusion 19 to move upward, it pushes the slide 17 to translate along the inclined rail 18.

[0029] The side surface of the end of the slide 17 is provided with a roller 20‌‌ that cooperates with the belt 10, and the roller 20 is located on the upper part of the belt body on the lower side of the belt 10‌‌. When the two rollers 20 are relatively displaced, the belt 10 is attached to the surface of the rotor in a closed loop, so that the belt 10 forms a closed loop belt body outside the rotor, and utilizes a larger and wider contact surface to assist the belt 10 in restraining the rotor and controlling the lateral runout of the rotor.

[0030] In this embodiment, Figure 1, Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown in Figure 2 , Figure 3 , Figure 4 , and Figures 5 to 10 , a through hole 21 is provided at one end of the drum 20 relative to the rotor, and a tubular caliper 22 is slidably connected in the through hole 21. A tension spring 23 for pulling the caliper 22 to slide inward is provided in the through hole 21. A shaftless fan blade 24 is fixedly provided inside the caliper 22. When the two drums 20 are driven to rotate by the belt 10, the shaftless fan blade 24 pushes the caliper 22 to pop out through the airflow. The two calipers 22 are engaged with each other relatively, so that the two drums 20 and the carriage 17 on both sides cannot displace away from each other. In this way, the belt 10 is stably wound around the rotor by using the locked drums 20.

[0031] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , and Figures 5 to 10 , a transverse shaft 25 corresponding to the drum 20 is fixedly provided on the side surface of the carriage 17, and a sliding groove 26 is provided at one end of the drum 20 relative to the transverse shaft 25. A shaft seat 27 is slidably connected in the sliding groove 26, and the shaft seat 27 is rotatably connected to the transverse shaft 25. A top spring 28 is provided in the sliding groove 26, and the top spring 28 pushes the drum 20 to deviate from the axis of the transverse shaft 25 along the shaft seat 27. When the drum 20 displaces relatively to push the belt 10, the reaction force of the belt 10 squeezes the drum 20 to displace along the shaft seat 27. At this time, the axis of the drum 20 is coaxial with the axis of the transverse shaft 25, and the drum 20 can rotate self - rotatably following the belt 10. After the belt 10 breaks, the drum 20 loses the external force, and the top spring 28 pushes the axis of the drum 20 to be misaligned with the axis of the transverse shaft 25. At this time, the drum 20 that rotates eccentrically due to inertia forms a belt locking area with the base 1, and the belt 10 is squeezed and fixed along the base 1. In this way, it can avoid the broken belt 10 from popping out and causing safety hazards, and can also use the belt 10 to lock the rotor to prevent the high - speed rotating rotor from falling out due to the breakage of the belt 10.

[0032] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , and Figures 5 to 10 , the tension pulley 12 is connected to the belt bracket 8 through a spring tensioning structure. The spring tensioning structure is used to adjust the position of the tension pulley 12 along the transmission direction of the belt 10. The spring tensioning structure automatically adjusts the position of the tension pulley 12 through the elastic potential energy of the pre - compressed spring, and compensates in real time for the length deformation of the belt 10 caused by temperature changes or long - term stretching.

[0033] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 ,Figures 5 to 10 As shown, the detector 4 includes a vibration sensor and a rotational speed sensor. The vibration sensor and the rotational speed sensor are connected to an external controller through a data cable. The controller is integrated with a balance analysis algorithm module based on the rotor vibration spectrum. The vibration sensor and the rotational speed sensor work together to achieve high-precision detection through the balance analysis algorithm in the controller.

[0034] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, the lifting function of the bracket 5 is realized by a hydraulic cylinder. The surface of the bracket 5 is provided with scale lines for marking the lifting stroke. The hydraulic cylinder drives the lifting table 7 to slide along the bracket 5, and cooperates with the surface laser-etched scale lines to achieve precise positioning.

[0035] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, a guiding slide rail is provided between the pipe seat 13 and the sliding column 14. A linear ball guiding slide rail is adopted between the pipe seat 13 and the sliding column 14 to ensure the translational stability of the sliding frame 17.

[0036] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, a buffer pad is embedded in the inner wall of the sliding groove 26. A friction-reducing coating is applied to the surface of the shaft seat 27. A dust-proof sleeve is sleeved outside the top spring 28. The buffer pad can attenuate 80% of the high-frequency vibration energy, reduce the deflection noise of the roller 20. The friction-reducing coating reduces the rotational resistance of the shaft seat 27. The dust-proof sleeve prevents dust from invading, and the service life of the top spring 28 is increased to 500,000 times.

[0037] The usage method and advantages of the present invention: When the rotor balance detection device of this double-link combine harvester motor is working and in use, the working process is as follows: As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown: S1. After the controller is started, it detects the reset state of the lifting table 7, the tension value of the belt 10, and the communication state of the sensor 4, ensures that the pressure of the lifting hydraulic system is stable ≥ 5 MPa, the frequency converter of the motor 11 is on standby, and inputs the rotor specification diameter, weight, and target speed range through the external controller. The system automatically matches the lifting stroke, the belt tension threshold is default 200 - 400 N, and the balance tolerance ISO standard grade; S2. Place the rotating shafts at both ends of the rotor on the rolling bearings 3 of the cartridge 2, adjust the position of the rotor so that its axis is aligned with the center of the belt rack 8, drive the lifting platform 7 to move downward by the hydraulic cylinder, drive the belt 10 by the belt rack 8 to contact the surface of the rotor, and the tension pulley 12 synchronously releases the surplus of the belt, so that the belt 10 wraps the rotor at a spiral angle of 15°. During this process, the sliding column 14 rises under the extrusion of the base, and the inclined rail 18 interacts with the convex block 19 to push the sliding frame 17 to translate towards the center, and the two side rollers 20 wind the belt 10 into a closed loop along the surface of the rotor; S3. The motor 11 drives the rotor to rotate through the pulley 9. When the belt 10 rotates, the shaftless fan blade 24 generates an air flow, which pushes the caliper 22 to pop out against the resistance of the tension spring 23, and forcibly locks the position of the sliding frame 17 after engagement; S4. When the belt 10 breaks, the top spring 28 instantly pushes the roller 20 to deviate from the axis of the cross shaft 25, and the eccentric roller 20 squeezes the residual belt section, and the static friction locks the rotor.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotor balance detection device for a double harvester motor, comprising a base (1), characterized in that: A tray (2) for placing the rotor is fixedly arranged on both the front and rear sides of the top of the base (1); the tray (2) is provided with two rolling bearings (3) for receiving the rotor shaft and a detector (4) for detecting the balance of the rotor; The left and right sides of the top of the base (1) are fixedly provided with brackets (5) with lifting functions, the two brackets (5) are connected by a crossbeam (6), a lifting platform (7) is slidably provided on the brackets (5), and a belt rack (8) is fixedly installed between the lifting platforms (7); Three pulleys (9) are rotatably arranged in the belt frame (8), and a belt (10) for driving the rotor is sleeved on the three pulleys (9). The belt frame (8) is provided with a motor (11) for driving the pulleys (9) and a tensioning wheel (12) for adjusting the tension of the belt (10). When the lifting platform (7) drives the belt frame (8) to move downward, the belt (10) spirally fits the surface of the rotor; The side surface of the belt rack (8) is fixedly provided with two front-to-back offset pipe seats (13), the bottom of the pipe seats (13) is movably plugged with a slide post (14), the slide post (14) and the slide frame (17) are linked via an inclined rail (18), and when the slide post (14) moves upward, it pushes the slide frame (17) to move horizontally; A roller (20) cooperating with the belt (10) is provided at the end of the slide (17). When the two rollers (20) are relatively displaced, the belt (10) is encircled to form a closed loop, thereby restraining the lateral runout of the rotor.

2. The rotor balance detection device for a double harvester motor according to claim 1, characterized in that: A through hole (21) is formed at one end of the roller (20) opposite to the rotor, a tubular caliper (22) is slidably connected in the through hole (21), a tension spring (23) is provided in the through hole (21) for pulling the caliper (22) to slide inwardly, and a shaftless fan blade (24) is fixedly provided inside the caliper (22); When the roller (20) is rotated by the belt (10), the shaftless fan blade (24) pushes the caliper (22) to pop out through the airflow, and the two calipers (22) are relatively engaged to lock the rollers (20) and the slide (17) on both sides.

3. The rotor balance detection device for a double harvester motor according to claim 1, characterized in that: A transverse axis (25) is fixed to the side surface of the slide frame (17); a slide groove (26) is provided at one end of the roller (20) opposite to the transverse axis (25); a shaft seat (27) is slidably connected in the slide groove (26); the shaft seat (27) is rotatably connected to the transverse axis (25); a top spring (28) is provided in the slide groove (26); When the reaction force of the belt (10) squeezes the roller (20), the axis of the roller (20) is coaxial with the axis of the transverse axis (25). After the belt (10) breaks, the top spring (28) pushes the axis of the roller (20) to be dislocated and squeezes and fixes the belt (10) by eccentric rotation.

4. The rotor balance detection device for a double harvester motor according to claim 1, characterized in that: The tensioning wheel (12) is connected to the belt frame (8) via a spring tensioning structure, and the spring tensioning structure is used to adjust the position of the tensioning wheel (12) along the transmission direction of the belt (10).

5. The rotor balance detection device for a double harvester motor according to claim 1, characterized in that: The detector (4) comprises a vibration sensor and a rotation speed sensor, and the vibration sensor and the rotation speed sensor are connected to an external controller via a data line.

6. The rotor balance detection device for a double harvester motor according to claim 1, characterized in that: The lifting function of the bracket (5) is realized by a hydraulic cylinder, and a scale line for marking the lifting stroke is provided on the surface of the bracket (5).

7. The rotor balance detection device for a double harvester motor according to claim 1, characterized in that: A guide slide rail is provided between the pipe seat (13) and the slide column (14).

8. The rotor balance detection device for a double harvester motor according to claim 3, characterized in that: A buffer pad is embedded in the inner wall of the slide groove (26), a friction-reducing coating is coated on the surface of the shaft seat (27), and a dust-proof sleeve is sleeved on the outer side of the top spring (28).

Images