Non-contact rotating machinery signal measuring device

Abstract

The utility model discloses a non-contact rotating machinery signal measuring device which comprises a frame body, and the bottom of the frame body is rotatably connected with an adjusting base. And the first induction coil mounting disc is arranged at the upper end of the frame body. The non-contact rotating machinery signal measuring device adopts an electromagnetic induction type wireless power supply mode, the transmitting coil and the receiving coil are respectively arranged on the rotating part and the fixed part, and the electric energy is transmitted from the fixed end to the rotating end by utilizing the electromagnetic induction principle so as to supply power to the measuring sensor and the data acquisition equipment; according to the mode, the wiring problem of traditional wired power supply is avoided, the flexibility and reliability of the system are improved, the problems of interference, electromagnetism, weight, strength and centrifugation are considered in material selection of the device, meanwhile, the whole acquisition system adopts a low-power-consumption, light-weight and simplified board card design, and the power supply requirement of the system in work can be met.

Description

Technical Field

[0001] This utility model relates to the field of rotating machinery technology, specifically a non-contact rotating machinery signal measurement device. Background Technology

[0002] Rotating machinery, such as motors, fans, and steam turbines, is a key piece of equipment in industrial production. Measuring its signals is of significant engineering importance. By measuring signals such as vibration, temperature, and speed, potential equipment faults can be detected in a timely manner, such as bearing wear, rotor imbalance, shaft misalignment, and blade cracks. For example, when bearings wear, the amplitude and frequency of the vibration signal will change. Based on these changes, repairs can be carried out before the fault worsens, avoiding serious consequences such as production interruptions and personnel injuries caused by sudden equipment failures. Monitoring and analyzing rotating machinery signals helps optimize equipment operating parameters and improve equipment efficiency. For instance, by measuring motor current, voltage, and speed signals, the motor's load status can be understood in real time, allowing for adjustments to the motor's operating frequency and voltage to ensure it operates at its optimal efficiency point, reducing energy consumption and improving production efficiency. Furthermore, the signal analysis results can be used to rationally plan equipment maintenance, reducing unnecessary maintenance downtime and improving equipment utilization. Based on the fundamental data obtained from signal measurement, fault diagnosis technology can be further combined to accurately pinpoint the location and cause of the fault, avoiding blind repairs. Compared with traditional periodic preventive maintenance, it can reduce unnecessary disassembly and replacement of parts, lower maintenance costs, and achieve timely maintenance.

[0003] While power supply for rotating machinery has seen some development due to the cable entanglement caused by rotation, problems still exist. Traditional power supply methods remain widely used: wired power supply and battery power supply are the most traditional and common methods for signal measurement in rotating machinery. For some fixed-installation rotating machinery with relatively stable positions, such as large motors and industrial fans, wired power supply is usually used, connecting an external power source to the measuring equipment via a cable. This method provides stable and reliable power, but the wiring is cumbersome, limiting its application in complex environments or on equipment that requires frequent movement. Strong vibrations can loosen the wiring connections of wired power supplies, affecting power quality and even causing malfunctions. Although slip ring power supply can solve the power supply problem for rotating parts, slip rings can experience wear and poor contact over long-term use, affecting the stability of the power supply. In many demanding applications, slip rings need to be specially designed and manufactured according to the machine space, installation requirements, and product specifications, which is costly and hinders engineering promotion and application. For some small rotating machinery or portable measuring equipment, battery power supply is more commonly used. It has the advantages of high flexibility and ease of movement, but battery capacity is limited, requiring regular replacement or charging, affecting the continuous operating time of the equipment. In addition, high temperatures may cause battery performance degradation and shorten its lifespan.

[0004] With the development of wireless power transmission technology, wireless power supply methods such as electromagnetic induction and magnetic resonance have begun to be applied in the field of signal measurement in rotating machinery. Although wireless power supply technology has made some progress, it still has shortcomings in terms of transmission efficiency and anti-interference capabilities. Energy transmission efficiency needs to be improved. Some wireless power supply systems have complex structures and high costs, and they also face the problem of efficiency optimization in practical applications. How to reduce energy loss and improve energy utilization efficiency is of great significance for reducing energy consumption and extending equipment operating time. At the same time, the power supply system needs to be compatible with the structure and operating characteristics of rotating machinery. In some small rotating machinery, space is limited, requiring power supply equipment to be small in size and light in weight, and not to affect the normal operation of rotating machinery. In some high-speed rotating machinery, the power supply system also needs to withstand the effect of high centrifugal force, which puts strict requirements on the structural design and material selection of the power supply equipment. In addition, the electromagnetic compatibility of the power supply system is also an important issue. It is necessary to avoid the power supply equipment interfering with the signal measurement of rotating machinery, and at the same time, to prevent the electromagnetic environment of rotating machinery from affecting the power supply system.

[0005] To address the aforementioned issues, an innovative design for a non-contact rotating machinery signal measurement device has been developed. Utility Model Content

[0006] The purpose of this invention is to provide a non-contact rotating machinery signal measuring device to solve the problems of poor power supply and signal transmission interference mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a non-contact rotating machinery signal measuring device, comprising a frame, wherein an adjusting base is rotatably connected to the bottom of the frame; a first induction coil mounting plate, wherein the first induction coil mounting plate is disposed on the upper end of the frame; a power supply receiving induction coil, wherein the power supply receiving induction coil is mounted on the inner side of the first induction coil mounting plate, and the inner side of the power supply receiving induction coil has three mounting holes; a second induction coil mounting plate, wherein the second induction coil mounting plate has three mounting holes with internal threads and is fastened to the power supply receiving induction coil by nylon screws, and the inner side of the second induction coil mounting plate has four mounting holes; and a first bearing connecting seat, wherein the first bearing connecting seat is fixedly mounted on the upper end of the frame, and the first bearing connecting seat has four mounting holes. The following components are included: a central shaft rotatably connected to the inner side of the first bearing connecting seat; a threaded hole located on the inner side of the central shaft; a second bearing connecting seat fixedly mounted on the upper end of the frame and rotatably connected to the tail end of the central shaft; a data acquisition board mounting plate with four mounting holes connected to the second bearing connecting seat, and eight mounting holes with screws on the outer ring of the rear wall of the data acquisition board mounting plate corresponding to the eight mounting holes on the outer ring of the transmission flange, fastened with screws; twelve circular holes on the inner ring of the transmission flange for the sensor to pass through; a variable diameter coupling connected to the long shaft of the transmission flange on the outer side of the data acquisition board mounting plate; and a rotating component connected to the variable diameter coupling.

[0008] Preferably, the second induction coil mounting plate has two horizontal wire holes for passing the positive and negative power cables generated by the circuit conversion terminals on the power supply receiving induction coil through to the rear end.

[0009] Preferably, the first bearing connector is made of aluminum and contains a supporting bearing. The inner side of the first bearing connector has two horizontal wire holes through which the positive and negative power cables of the power supply receiving induction coil are passed.

[0010] Preferably, the central shaft is a hollow cylindrical design and is made of aluminum.

[0011] Preferably, the threaded holes are provided in two sets, and the two sets of threaded holes are distributed at 120° on the central cylindrical surface.

[0012] Preferably, the acquisition board mounting plate has wiring pins for connecting the electrical signal cable of the laser cylinder, and a central through hole for the laser cable to pass through.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The proposed solution uses electromagnetic induction-based wireless power supply. It transmits electrical energy from the fixed end to the rotating end using electromagnetic induction by installing transmitting and receiving coils on the rotating and fixed parts, respectively, to power the measuring sensors and data acquisition equipment. This method avoids the wiring problems of traditional wired power supply, improves the flexibility and reliability of the system, and takes into account interference, electromagnetic, weight, strength, and centrifugal issues when selecting materials for the device. At the same time, the entire acquisition system adopts a low-power, lightweight, and simplified board design, which can meet the power supply requirements of this system.

[0015] Laser communication is chosen for signal transmission in various applications, such as data acquisition in industrial production, where there are extremely high requirements for data transmission speed and real-time performance. Laser communication can provide data transmission rates of tens of gigabits per second or even higher, meeting the needs of industrial sectors for rapid transmission of large amounts of data and ensuring efficient and stable operation of the production process. The strong directionality of lasers allows for precise positioning and synchronization. In industrial automated production lines, laser communication enables high-precision time synchronization and position calibration between devices. While industrial environments contain numerous sources of electromagnetic interference, such as motors, laser communication is unaffected by electromagnetic interference and can stably transmit signals in complex electromagnetic environments, ensuring communication reliability and reducing the impact of interference. Interference-induced data transmission errors or interruptions can improve the stability and security of the entire industrial system. It can be flexibly installed and adjusted according to the actual layout and needs of the site, eliminating the need for extensive cabling. It is particularly effective in solving the problem of tangled communication cables, enabling wireless communication between devices, reducing wiring costs and construction difficulty, and facilitating system expansion and upgrades. However, lasers have high directionality and coherence, with a very small beam divergence angle. If the optical paths of the transmitting and receiving ends are not precisely aligned, the laser beam may not reach the receiving end accurately, or the receiving end may not effectively collect the transmitted laser signal, leading to weakened signal strength, increased bit error rate, or even inability to communicate normally. In particular, the vibration of the rotating machinery platform itself can cause slight displacements and angular changes in the transmitting and receiving antennas, disrupting the alignment of the optical path. In this device, the laser body is installed in the middle of the support bearing, providing excellent rotational stability. Simultaneously, the laser body is installed at the center of the central shaft using a specially designed but simple tooling. Coarse adjustment using the platform's adjustable studs and fine adjustment using the central shaft's adjusting screw holes ensures the laser center is positioned at the axis of rotation of the entire system, guaranteeing the optical path is on the axis. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall bottom view of the present invention;

[0018] Figure 3 This is a schematic diagram of the distribution structure of the first induction coil mounting plate and the second induction coil mounting plate of this utility model;

[0019] Figure 4 This is a front sectional view of the variable diameter coupling of this utility model.

[0020] In the diagram: 1. Frame; 2. Adjustable base; 3. First induction coil mounting plate; 4. Power supply receiving induction coil; 5. Second induction coil mounting plate; 6. First bearing connecting seat; 7. Central shaft; 8. Threaded hole; 9. Second bearing connecting seat; 10. Acquisition board mounting plate; 11. Variable diameter coupling; 12. Rotating component. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides a technical solution: a non-contact rotating machinery signal measuring device, comprising: a frame 1, with an adjusting base 2 rotatably connected to the bottom of the frame 1; a first induction coil mounting plate 3, disposed on the upper end of the frame 1; a power supply receiving induction coil 4, mounted inside the first induction coil mounting plate 3, with three mounting holes on the inner side of the power supply receiving induction coil 4; a second induction coil mounting plate 5, having three mounting holes with internal threads on it, which is fastened to the power supply receiving induction coil 4 by nylon screws, and with four mounting holes on the inner side of the second induction coil mounting plate 5; and a first bearing connecting seat 6, which is fixedly mounted on... At the upper end of the frame 1, the first bearing connecting seat 6 has four mounting holes that are fastened to the mounting holes on the second induction coil mounting plate 5 by screws; the central shaft 7 is rotatably connected to the inner side of the first bearing connecting seat 6; the threaded hole 8 is opened on the inner side of the central shaft 7; the second bearing connecting seat 9 is fixedly installed at the upper end of the frame 1 and is rotatably connected to the tail end of the central shaft 7; the acquisition board mounting plate 10 has four mounting holes that are connected to the second bearing connecting seat 9, and the outer edge of the rear wall of the acquisition board mounting plate 10 has mounting holes with screw holes and eight mounting holes on the outer ring corresponding to the transmission flange, which are fastened by screws; the inner ring of the transmission flange has twelve round holes for the sensor to pass through.

[0023] A variable diameter coupling 11 is connected to the long shaft of the transmission flange on the outer side of the acquisition board mounting plate 10; a rotating component 12 is connected to the variable diameter coupling 11.

[0024] The second induction coil mounting plate 5 has two horizontal wire-passing holes to allow the positive and negative power cables generated by the circuit conversion terminal on the power supply receiving induction coil 4 to pass through to the rear end; the first bearing connecting seat 6 is made of aluminum and contains a supporting bearing, and the inner side of the first bearing connecting seat 6 has two horizontal wire-passing holes to allow the positive and negative power cables of the power supply receiving induction coil 4 to pass through; the central shaft 7 is a hollow cylindrical design and is made of aluminum; two sets of threaded holes 8 are provided, and the two sets of threaded holes 8 are distributed at 120° on the cylindrical surface of the central shaft 7; the acquisition board mounting plate 10 has wiring pins for connecting the electrical signal cables of the laser cylinder, and the central through hole is for the laser cable to pass through;

[0025] Working Principle: The first induction coil mounting plate 3 has a power supply transmitting induction coil 4 mounted on it. After power input is connected through the input terminal, the coil generates magnetic field energy. The first induction coil mounting plate 3 is fixed to the screw holes of the frame 1 with nylon screws. The power supply receiving induction coil 4 receives the magnetic field energy generated by the transmitting coil when power is input, thus generating electrical energy. The output terminal provides positive and negative power. It has three mounting holes. The second induction coil mounting plate 3 is made of nylon and has three mounting holes with internal threads. It is fastened to the power supply receiving induction coil 4 with nylon screws. It has two horizontal wire holes to pass the positive and negative power cables generated by the circuit conversion terminal on the power supply receiving induction coil 4 to the rear end. It has four mounting holes. All the above components are made of nylon instead of metal. First, it can effectively avoid the influence of metal on the magnetic field of the induction coil, avoid the damage to the device caused by eddy currents and heat generation, and ensure stable power supply and long working life. Second, because the power of the above induction power supply coil and board is related to the signal acquisition at the rear end... The power matching of the circuit board and the low power consumption of the backend provide favorable support for the weight and size of the inductive power supply module. Therefore, the front-end inductive power supply module is relatively light in size and weight. The strength of the nylon material is sufficient to support it, perfectly replacing the metal material. This reduces weight and cost, making it more suitable for engineering. The final rotational power of the entire device comes from the primary power of the rotating component 12. The selection of nylon material effectively reduces weight and reduces the primary power loss of the rotating machinery, thus reducing the energy loss of the entire system. The first bearing connecting seat 6 is made of aluminum. The material contains a support bearing with four mounting holes. These holes are fastened to the mounting holes on the second induction coil mounting plate 5 with screws, allowing the second induction coil mounting plate 5 to rotate. It also has four additional mounting holes and two horizontal wire holes for passing the positive and negative power cables of the power supply receiving induction coil 4 through. The connection between the power supply and the mounting plate is secured and supported by studs passing through the through-hole spacer and then through the mounting holes on both sides. The central shaft 7 is a hollow cylindrical design made of aluminum. It has two sets of three screw holes 8 distributed at 120 degrees on the cylindrical surface. The two sets of screw holes 8 are completely parallel.The laser cylinder is fixed and adjusted by the insertion depth of the screws. Adjusting the depth allows the laser's optical center to be level with the axis of the rotating body. The laser cylinder is installed inside the central shaft 7 and needs to be fed in using a laser fixture to ensure that the laser cylinder's height position on the central shaft 7 is exactly at the center of the cylinder, neither too far forward nor too far back. This ensures that the six screws extending from the central shaft 7 can fully contact and fix the laser cylinder's copper wall surface. Therefore, the diameter of the central shaft 7 is designed to differ from the diameter of the laser cylinder by a difference of several to tens of micrometers. This ensures that the laser can enter without wear, and the fixture ensures the laser cylinder's centered placement. Two sets of screws can both adjust the laser's coaxial center and tighten it, ensuring that it rotates as a single unit without wobbling. The power supply receives the positive and negative power cables from the induction coil 4. The laser cylinder passes through two horizontal holes on the front (left) end face of the central shaft 7 and extends directly to the rear end to exit through two horizontal holes on the rear (right) end face of the central shaft 7. There are also four mounting holes distributed on the front and rear (or left and right) end faces of the two central shaft 7 for fastening and corresponding mounting holes for connection and fastening with the second bearing connecting seat 9. There are two cables at the end of the laser cylinder, which are the electrical signal input cables for the laser. They pass directly out from the cylinder of the central shaft 7. The shafts extending from the left and right of the central shaft 7 directly generate mechanical clamping force with the bearing connecting seats of the first bearing connecting seat 6 and the second bearing connecting seat 9 through interference fit, so that they are connected to the bearings on both sides. The four mounting threaded holes 8 mentioned above are used for the screws of the second induction coil mounting plate 5 and the acquisition board mounting plate 10 to be inserted and fastened. They are all distributed at 90 degrees and evenly divided into 360-degree circular surfaces to ensure the force balance of the installation and fastening.The second bearing connector 9 is similar to the first bearing connector 6, and will not be described in detail here. The acquisition board mounting plate 10 has four mounting holes that connect to the second bearing connector 9, and two horizontal cable guide holes through which the positive and negative power cables of the power supply receiving induction coil 4 are passed. The cable of the laser cylinder passes through its center. There are three mounting holes distributed at 120 degrees, on which two equally sized parallel rotating device plates with concentric circular through holes are mounted. These plates have connector pins for connecting the electrical signal cables of the laser cylinder. A central via hole is used for the laser cable to pass through. On the parallel second plate are the positive and negative power cables leading from the power supply receiving induction coil 4. The acquisition board mounting plate 10 consists of three concentric parallel circular surfaces with the first and second plates, but the acquisition board mounting plate 10 is slightly larger in diameter than the first and second plates. An outer edge gap allows the power supply receiving induction coil 4 cable to pass through, corresponding to the positive and negative power terminals on the second plate. The first and second plates are connected and secured to the acquisition board mounting plate 10 through three mounting holes spaced 120 degrees apart. The acquisition board mounting plate 10... The circular surfaces of the two plates are connected and secured at intervals using screws and studs. Eight sets of ultra-fine, flexible cables extend from the rear end face (or right end face) of the second plate, serving as signal sensors. Extending rearward, the outer edge of the rear wall of the acquisition board mounting plate 10 has mounting holes with screws, corresponding to eight mounting holes on the outer ring of the transmission flange, secured with screws. The inner ring of the transmission flange has twelve circular holes for the sensors to pass through. The transmission flange is made of aluminum and has a protruding long shaft. A reducing coupling 11 connects the transmission flange... The long shaft is connected to the shaft of the rotating component 12, so that the rotation of the rotating component 12 drives the transmission flange to rotate, and then drives the components 3-10 to rotate in sequence; the rotating component 12 (which may be a motor, impeller blade, etc.) has its shaft connected to the transmission flange shaft of the variable diameter coupling 11. Its rotation indicates that the sensor in the acquisition board mounting plate 10 with adhesive can be surface-mounted, or the sensor cable pre-embedded inside the rotating component 12 can be led out and connected to the corresponding sensor input terminal of the second board in the acquisition board mounting plate 10 in sequence;

[0026] All of the above are installed on the plate of the frame 1. The plate is supported by the support column and the plane. In order to ensure that the contact surface between the plate and the plane is horizontal, the four bottom adjustment bases 2 ensure horizontal adjustment. By adjusting, the concentric axis of the laser transmitting and receiving components can be made horizontal.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-contact rotating machinery signal measuring device, characterized in that, include: The frame (1) has an adjustable base (2) rotatably connected to its bottom. The first induction coil mounting plate (3) is set at the upper end of the frame (1); The power supply receiving induction coil (4) is installed inside the first induction coil mounting plate (3), and three mounting holes are provided inside the power supply receiving induction coil (4). The second induction coil mounting plate (5) has three mounting holes with internal threads and is fastened to the power supply receiving induction coil (4) by nylon screws. The second induction coil mounting plate (5) has four mounting holes on its inner side. The first bearing connecting seat (6) is fixedly installed on the upper end of the frame (1), and the first bearing connecting seat (6) has four mounting holes that are fastened to the mounting holes on the second induction coil mounting plate (5) by screws. The central shaft (7) is rotatably connected to the inner side of the first bearing connecting seat (6); A threaded hole (8) is provided inside the central shaft (7); The second bearing connecting seat (9) is fixedly installed on the upper end of the frame (1), and the second bearing connecting seat (9) is rotatably connected to the tail end of the central shaft (7); The acquisition board mounting plate (10) has four mounting holes connected to the second bearing connecting seat (9), and the outer edge of the rear wall of the acquisition board mounting plate (10) is distributed with mounting holes with screw holes and eight mounting holes on the outer ring corresponding to the transmission flange, which are fastened by screws. The inner ring of the transmission flange is distributed with twelve round holes for the sensor to pass through. A variable diameter coupling (11) is connected to the long shaft of the transmission flange on the outer side of the acquisition board mounting plate (10); Rotating component (12), which is connected to the variable diameter coupling (11).

2. The non-contact rotating machinery signal measuring device according to claim 1, characterized in that: The second induction coil mounting plate (5) has two horizontal wire holes, through which the positive and negative power cables generated by the circuit conversion terminal on the power supply receiving induction coil (4) are passed to the rear end.

3. The non-contact rotating machinery signal measuring device according to claim 1, characterized in that: The first bearing connecting seat (6) is made of aluminum and contains a supporting bearing. Two horizontal wire holes are opened on the inner side of the first bearing connecting seat (6) to pass through the positive and negative power cables of the power supply receiving induction coil (4).

4. The non-contact rotating machinery signal measuring device according to claim 1, characterized in that: The central shaft (7) is a hollow cylindrical design and is made of aluminum.

5. The non-contact rotating machinery signal measuring device according to claim 1, characterized in that: The threaded holes (8) are provided in two sets, and the two sets of threaded holes (8) are distributed at 120° on the cylindrical surface of the central axis (7).

6. The non-contact rotating machinery signal measuring device according to claim 1, characterized in that: The acquisition board mounting plate (10) has wiring pins for connecting the electrical signal cable of the laser cylinder, and a central through hole for the laser cable to pass through.

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