CN109630542B - A self-powered smart bearing with built-in wireless sensors - Google Patents

Abstract

The invention provides an intelligent bearing with built-in wireless sensor and self-power supply function. The bearing has a sensor component, an antenna, a coil component and a magnet, wherein: an annular inner groove is arranged on the inner surface of the outer ring, and the sensor component, the antenna and the coil are respectively arranged In the inner groove, the outer surface of the inner ring is provided with a ring-shaped outer groove, the magnet is connected and arranged in the outer groove, the magnet rotates at a high speed with the inner ring, and generates a cutting magnetic force line movement relative to the coil assembly, which generates an induced potential in the coil assembly. The component is connected to the sensor component to provide electrical energy for the sensor component; the sensor component is used to collect bearing operating parameter information, and convert the collected information into data; the sensor component is connected to the antenna, and the antenna is used to send the data to achieve real-time monitoring of the bearing. The present invention does not need external power supply, and realizes real-time state monitoring of the bearing during the running process through wireless transmission of signals from multi-parameter sensors.

Description

A self-powered smart bearing with built-in wireless sensors

technical field

The present invention relates to an intelligent bearing, in particular to an intelligent bearing with a built-in wireless sensor and a self-power supply function.

Background technique

The modern industry is gradually developing towards specialization and refinement, and the market share of various high-end large-scale machinery and equipment is also increasing, which requires the provision of commensurate maintenance strategies. In these large-scale equipment, the bearing has become the most important core component and the "heart" of the equipment motion system. These large bearings are not expensive to manufacture, and once damaged, the equipment will be shut down, and it will even cause economic losses in the millions or tens of millions. According to information, the equipment failure rate caused by bearing damage is about 40% in the field of high-speed trains, about 40% in the field of large fans, about 35% in the field of aero-engines, about 30% in the field of heavy machinery, and about 30% in the field of gearboxes. 20%.

At present, the reliable automatic equipment and means for monitoring the bearing health status are usually manual use of general equipment to regularly check the bearing status, improve the lubrication conditions, and immediately repair and replace the bearing if it is found to be faulty. This method is not only inaccurate and low in reliability, but also time-consuming and labor-intensive. In particular, it is impossible to monitor the working conditions of the bearing and take measures at the first time to avoid greater losses. Therefore, online monitoring of the health status of key large-scale bearings has become the only way for various large-scale machinery and equipment.

Smart bearing is a new type of bearing with online monitoring capability. It is embedded with sensors on the basis of traditional bearings, which facilitates early detection of potential faults, so it has become the first choice and mainstream for online monitoring of bearing health status.

However, the development of the existing smart bearings at home and abroad has just started, and there are still many problems and defects. There are two main defects: First, the so-called smart bearings are often unable to supply energy by themselves, and can only achieve functions through external power supply, while wired power supply requires dragging cables, which cannot meet the needs of bearing rotation, and wireless power supply requires external power supply. The power supply coil is installed, the transmission efficiency is low and the transmission distance is limited, which cannot meet the requirements of on-site use. Second, all kinds of data collected by the built-in sensors of the existing smart bearings are transmitted through cables, which brings great limitations to practical applications and cannot be realized in most workplaces.

SUMMARY OF THE INVENTION

In view of the defects in the prior art, the purpose of the present invention is to provide a smart bearing with a built-in wireless sensor and a self-power supply function. Multiple sensors are built-in to obtain various working condition parameters of the smart bearing when it is working, and the data is collected through the circuit and carried out. Preprocessing, the measurement results are sent through the antenna to realize the wireless transmission of data, and the sensor and all circuits can be powered by the rotation of the bearing itself, which realizes the wireless transmission and self-energy supply of the intelligent bearing, and can meet the intelligent needs of most bearings. .

According to the present invention, a smart bearing with a built-in wireless sensor and a self-power supply function is provided. The smart bearing includes an outer ring, a roller, and an inner ring. The roller is used to realize the rolling of the smart bearing, and the smart bearing includes a sensor. Components, antennas, coil assemblies, magnets, of which:

The inner hole surface of the outer ring is provided with an annular inner groove, the sensor assembly, the antenna and the coil are fixedly connected in the inner groove, the outer surface of the inner ring is provided with an annular outer groove, the The magnet is connected and fixed in the outer slot; the magnet rotates at a high speed with the inner ring, and generates a cutting magnetic field line movement relative to the coil assembly, and an induced potential is generated in the coil assembly to provide electrical energy for the sensor assembly ;

The coil assembly is connected to the sensor assembly, and the sensor assembly is used to collect operating parameter information of the intelligent bearing, and convert the collected information into data;

The sensor assembly is connected to the antenna, and the antenna is used for sending the data to realize real-time monitoring of the smart bearing.

Preferably, the smart bearing includes a plurality of the sensor assemblies, and the sensor assemblies are respectively uniformly arranged in the inner grooves of the outer ring;

The intelligent bearing includes a plurality of antennas, the antennas are evenly arranged in the inner groove of the outer ring, and the antennas are arranged at intervals from the sensor assembly;

The intelligent bearing includes a plurality of coil assemblies, the coil assemblies are evenly arranged in the inner groove of the outer ring, and the coil assemblies are spaced apart from the sensor assembly and the antenna;

The intelligent bearing includes a plurality of the magnets, the magnets are evenly arranged in the outer grooves of the inner ring, the number of the magnets is different from the number of the coil components, and the number of the coil components is not a multiple of each other.

Preferably, the sensor assembly includes a micro-integrated sensor, a processing circuit and a sending circuit, the micro-integrated sensor is used to collect parameter information of the operation process of the intelligent bearing, and the processing circuit performs data processing on the collected information The processed data is sent to the antenna through the transmission circuit, and the data is output through the antenna.

The sensor component has a built-in miniature integrated sensor to adapt to the small space inside the bearing; the sensor component has a built-in processing circuit, which can collect and process the data of all sensors; the sensor component has a built-in wireless transmission circuit, which can output the collected data through the antenna. data.

Preferably, the sensor assembly includes a temperature sensor, an acceleration sensor, and a rotational speed sensor, which are respectively used to measure the temperature, vibration, and speed information generated during the operation of the smart bearing.

Preferably, the antenna is a microstrip patch antenna, which can obtain a high-gain radiation effect in a small space; the microstrip patch antenna includes a ground plate, a dielectric substrate, and a conductor patch, and the ground plate and the conductor The patches are respectively adhered to two sides of the dielectric substrate through glue to form a thin antenna.

Preferably, the grounding plate is a rectangular sheet, and the material is a highly conductive metal material; the size of the dielectric substrate is the same as that of the grounding plate, and the material of the dielectric substrate is a dielectric with a high dielectric constant; the conductor stickers The sheet is a rectangular sheet, the size of the conductor patch is smaller than that of the dielectric substrate, the material of the conductor patch is a highly conductive metal material, and the conductor patch has a microstrip feed line.

Preferably, the coil assembly includes a coil and an iron core, the cross-sectional shape of the upper structure of the iron core is cylindrical, the cross-sectional shape of the lower structure is a rectangular plate shape, and the lower structure is provided with a first through hole, so The first through hole is used to fix the coil assembly on the outer ring, and the annular coil is formed by winding the enameled wire on the cylindrical shape, so that the coil and the iron core form an integrated coil components.

Preferably, the magnet is an arc-shaped permanent magnet, the radius of curvature of the inner arc of the magnet is equal to the radius of curvature of the bottom circle of the outer groove of the inner ring, and the magnet is provided with a second through hole for attaching the magnet fixed on the inner ring.

Preferably, the thickness of the magnet ensures that there is a certain gap between the outer circle of the magnet and the coil assembly.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention is based on the intelligent bearing of the self-powered wireless sensor system, which does not require external power supply, and can realize real-time state monitoring of the intelligent bearing during the operation process through wireless transmission of multi-parameter sensors. Yes, the function can only be realized by external power supply.

The invention enables the intelligent bearing to realize its own fault warning, can guide maintenance before the fault occurs, and avoid the loss caused by the fault.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

Fig. 1a is a schematic diagram of the structure of an intelligent bearing in a preferred embodiment of the present invention;

Fig. 1b is a partial enlarged view of part A in Fig. 1 of a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of the composition of a sensor assembly in a preferred embodiment of the present invention;

3a is a schematic side view of an antenna structure in a preferred embodiment of the present invention;

Figure 3b is a top view of Figure 3a in a preferred embodiment of the present invention;

Figure 4a is a schematic diagram of the structure of a coil assembly in a preferred embodiment of the present invention;

Figure 4b is a top view of 4a in a preferred embodiment of the present invention;

5a is a schematic diagram of the structure of a magnet in a preferred embodiment of the present invention;

Figure 5b is a top view of 5a in a preferred embodiment of the present invention;

The symbols in the figure are respectively: outer ring 1, roller 2, inner ring 3, sensor assembly 4, antenna 5, coil assembly 6, magnet 7, ground plate 8, dielectric substrate 9, conductor patch 10, coil 11, The iron core 12 , the inner slot 13 , the outer slot 14 , the first through hole 15 , and the second through hole 16 .

Detailed ways

The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

As shown in Figures 1-5, it is a schematic structural diagram of a preferred embodiment of a smart bearing with a built-in wireless sensor and a self-power supply function of the present invention, which includes: an outer ring 1, a roller 2, an inner ring 3, and a sensor assembly 4. Antenna 5, coil assembly 6, magnet 7, of which:

As shown in Figure 1, the inner hole surface of the outer ring 1 avoids the position of the rollers 2, that is, the position between the two rows of rollers 2, and an annular inner groove 13 is provided for installing and fixing all the sensor assemblies 4. , antenna 5 and coil assembly 6; roller 2 is a steel ball or roller of a conventional smart bearing, used to realize the relative pure rolling between outer ring 1 and inner ring 3; the outer surface of inner ring 3 and outer ring 1 At the position corresponding to the inner groove 13 , that is, the position between the two rows of rollers 2 , an annular outer groove 14 is provided for installing and fixing all the magnets 7 .

A plurality of sensor assemblies 4, a plurality of antennas 5, a plurality of coil assemblies 6, and a plurality of sensor assemblies 4 are evenly arranged in the inner groove 13 of the outer ring 1 in the inner groove 13 of the outer ring 1; Evenly arranged in the inner slot 13 of the outer ring 1, and the antenna 5 and the sensor component 4 are arranged at intervals; a plurality of coil components 6 are evenly arranged in the inner slot 13 of the outer ring 1, and the coil components 6 are arranged with the sensor component 4 and the antenna. 5 interval settings.

A plurality of magnets 7 are arranged in the outer slot 14 of the inner ring 3, and the plurality of magnets 7 are evenly arranged in the outer slot 14. In the specific implementation, the number of magnets 7 arranged in the outer slot 14 of the inner ring 3 is different from the number of coil components 6 , and the number of coil components 6 is not a multiple of each other.

As shown in FIG. 1a, in this embodiment, four sensor assemblies 4 are used, and the four sensor assemblies 4 are evenly distributed in the inner groove 13 of the outer ring 1 at 90-degree intervals. Four antennas 5 are used, and the four antennas 5 are evenly distributed in the inner groove 13 of the outer ring 1 at 90 degree intervals, and are spaced apart from the sensor assembly 4, and the included angle with the sensor assembly 4 is 30 degrees. Four coil assemblies 6 are used, and the four coil assemblies 6 are evenly distributed in the inner slot 13 of the outer ring 1 at a 90-degree interval, and the angle between the sensor assembly 4 and the antenna 5 is 30 degrees; using six magnets 7, The number of magnets 7 cannot be the same as the number of coil components 6, nor can they be multiples of the number of coil components 6. The magnets 7 are evenly distributed in the outer slots 14 of the inner ring 3 at 60-degree intervals.

As shown in Figure 2: In some preferred embodiments, the sensor assembly 4 is built with a variety of parameter measurement sensors, including a temperature sensor, an acceleration sensor, and a rotational speed sensor, which respectively measure the temperature, vibration, and speed information generated during the operation of the smart bearing. . The sensor assembly 4 has a built-in miniature integrated sensor to adapt to the narrow space inside the bearing. The sensor assembly 4 has a built-in processing circuit, which can collect and process the data of all sensors; the sensor assembly 4 has a built-in wireless transmission circuit, which can be output through the antenna 5 collected data.

As shown in Figures 3a and 3b: in some preferred embodiments, the antenna 5 is a microstrip patch antenna, comprising a ground plate 8, a dielectric substrate 9, a conductor patch 10, a ground plate 8 and a conductor patch 10 Both sides are bonded to both sides of the dielectric substrate 9 by glue to form a thin antenna, wherein the ground plate 8 is a rectangular sheet, and the material is a highly conductive metal material, such as copper. The length and width of the dielectric substrate 9 are the same as those of the grounding plate 8, but the thickness is slightly thicker, and the material is a dielectric with a high dielectric constant, such as polytetrafluoroethylene. The conductor patch 10 is a rectangular sheet, the length and width are smaller than that of the dielectric substrate 9, and the material is a highly conductive metal material, such as copper; the conductor patch 10 itself also has a narrow microstrip feed line, and the conductor patch 10 is one.

As shown in Figures 4a and 4b: in some preferred embodiments, the coil assembly 6 includes two parts, a coil 11 and an iron core 12. The upper half of the iron core 12 is cylindrical, which is convenient for winding the coil 11; the lower half of the iron core 12 is cylindrical. The coil 11 is in the shape of a rectangular plate, and is provided with a first through hole 15, which is convenient for fixing the coil assembly 6 on the outer ring 1; , forming an integrated coil assembly 6 .

As shown in Figures 5a and 5b: in some preferred embodiments, the magnet 7 is an arc-shaped permanent magnet, and the radius of curvature of the inner arc of the magnet 7 is equal to the radius of curvature of the bottom circle of the outer groove of the inner ring 3; the thickness of the magnet 7 should ensure that The outer circle of the magnet 7 is as close as possible to the coil assembly 6, but a sufficient gap needs to be left, for example, keep the gap between the two at 2mm; the magnet 7 is provided with a second through hole 16, which is convenient for fixing the magnet 7 on the inner ring 3. .

In the embodiment shown in FIG. 1a, 4 sensor assemblies 4, 4 antennas 5, 4 coil assemblies 6, and 6 magnets 7 are used. In the specific implementation of the present invention, the number of sensor assemblies 4, antennas 5, coil assemblies The number of magnets 6 and 7 is not limited to the number in this embodiment, and the matching number can be set as required.

The working principle of the present invention is as follows: the outer ring 1 is positioned and fixed with the user's inner hole of the bearing seat, and remains stationary; the inner ring 3 is positioned and fixed with the user's rotating shaft, and rotates at high speed with the rotating shaft; The magnet 7 in the outer slot rotates at a high speed with the inner ring 3, and generates a cutting magnetic field line motion relative to the coil assembly 6 placed in the inner slot of the outer ring 1, thereby generating an induced potential in the coil assembly 6 and providing electrical energy for the sensor assembly 4; After the sensor assembly 4 obtains the electric energy from the coil assembly 6, it continuously collects the temperature, vibration acceleration, rotational speed and other information of the intelligent bearing, converts it into data, and sends the data wirelessly through the antenna 5, so as to realize the real-time monitoring of the health state of the intelligent bearing.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various variations or modifications within the scope of the claims, which do not affect the essential content of the present invention.

Claims (9)

1. The utility model provides a built-in wireless sensor and have self-powered function's intelligent bearing, intelligent bearing includes outer lane, roller, inner circle, the roller is used for realizing intelligent bearing's roll, its characterized in that: the intelligent bearing further comprises a sensor assembly, an antenna, a coil assembly and a magnet, wherein:

the inner surface of the outer ring is provided with an annular inner groove, the sensor assembly, the antenna and the coil are respectively arranged in the inner groove, the outer surface of the inner ring is provided with an annular outer groove, the magnet is arranged in the outer groove, the magnet rotates together with the inner ring at a high speed and generates cutting magnetic line of force movement relative to the coil assembly, induced potential is generated in the coil assembly, and electric energy is provided for the sensor assembly;

the sensor assembly is used for acquiring the operation parameter information of the intelligent bearing and converting the acquired information into data;

the antenna is used for sending the data collected by the sensor assembly, and real-time monitoring of the intelligent bearing is achieved.

2. The intelligent bearing with built-in wireless sensor and self-powered function as claimed in claim 1, wherein:

the intelligent bearing comprises a plurality of sensor assemblies which are respectively and uniformly arranged in the inner groove of the outer ring;

the intelligent bearing comprises a plurality of antennas, the antennas are uniformly arranged in the inner groove of the outer ring, and the antennas and the sensor assembly are arranged at intervals;

the intelligent bearing comprises a plurality of coil assemblies, the coil assemblies are uniformly arranged in the inner groove of the outer ring, and the coil assemblies, the sensor assemblies and the antenna are arranged at intervals;

the intelligent bearing comprises a plurality of magnets, the magnets are uniformly arranged in the outer grooves of the inner ring, the number of the magnets is different from that of the coil assemblies, and the number of the magnets is not a multiple of that of the coil assemblies.

3. The intelligent bearing with built-in wireless sensor and self-powered function as claimed in claim 1, wherein: the sensor assembly comprises a miniature integrated sensor, a processing circuit and a sending circuit, the miniature integrated sensor is used for collecting parameter information of the intelligent bearing in the operation process, the processing circuit carries out data processing on the collected information and sends the processed data to the antenna through the sending circuit, and the data is output through the antenna.

4. The intelligent bearing with built-in wireless sensor and self-powered function as claimed in claim 1, wherein: the sensor assembly comprises a temperature sensor, an acceleration sensor and a rotating speed sensor which are respectively used for measuring temperature, vibration and speed information generated in the operation process of the intelligent bearing.

5. The intelligent bearing with built-in wireless sensor and self-powered function as claimed in claim 1, wherein: the antenna is a microstrip patch antenna, the microstrip patch antenna comprises a ground plate, a dielectric substrate and a conductor patch, and the ground plate and the conductor patch are respectively adhered to two surfaces of the dielectric substrate through glue.

6. A built-in wireless sensor intelligent bearing with self-powered function according to claim 5, characterized in that: the grounding plate is a rectangular sheet and is made of a high-conductivity metal material;

the size of the dielectric substrate is the same as that of the grounding plate, and the dielectric substrate is made of a dielectric with a high dielectric constant;

the conductor patch is a rectangular sheet, the size of the conductor patch is smaller than that of the dielectric substrate, the conductor patch is made of a high-conductivity metal material, and the conductor patch is provided with a microstrip feeder line.

7. The intelligent bearing with the self-powered function and the built-in wireless sensor according to any one of claims 1 to 6, wherein the coil assembly comprises a coil and an iron core, the cross-sectional shape of the upper structure of the iron core is a cylindrical shape, the cross-sectional shape of the lower structure is a rectangular plate shape, the lower structure is provided with a first through hole, the first through hole is used for fixing the coil assembly on the outer ring, and an enameled wire is wound on the cylindrical shape to form the annular coil, so that the coil and the iron core form an integrated coil assembly.

8. A smart bearing with built-in wireless sensor and self-powered function as claimed in claim 7, wherein said magnet is an arc-shaped permanent magnet, the radius of curvature of the inner arc of said magnet is equal to the radius of curvature of the bottom circle of said outer groove of said inner ring, said magnet is provided with a second through hole for fixing said magnet to said inner ring.

9. The intelligent bearing with built-in wireless sensor and self-powered function of claim 8, wherein the thickness of the magnet ensures that the outer circle of the magnet has a certain gap with the coil assembly.

Images