CN203968010U - A kind of Blast Furnace Top Gas Recovery Turbine Unit (TRT) - Google Patents

Abstract

The utility model relates to a power generating device, which belongs to the technical field of new energy and power generation. The left and right ends of the outer ring and the inner ring are respectively provided with an inner ring groove and an outer ring groove, and the outer ring grooves of the two inner rings are respectively installed with a frame with a radial plate through interference fit; each frame is installed on both sides There are circuit boards and metal sheets to form a radial cavity, a piezoelectric sheet is bonded to the metal sheet corresponding to the radial cavity, and the excited magnet is connected to the piezoelectric sheet and the metal sheet through screws; sensors are installed on the skeleton corresponding to the radial cavity; Electrodes, metal sheets and sensors are connected to the circuit board through different wire groups; two excitation magnets are respectively inlaid on both sides of the cylindrical roller and face the two excited magnets, and the opposite sex of the two adjacent magnets in each axial direction The poles are installed close together. Features and advantages: It has the function of self-powered sensor monitoring and can be used as an independent standard component without changing the structure of its installed equipment, which can realize real-time online monitoring in the true sense.

Description

a power generating device

technical field

The utility model belongs to the field of new energy and power generation, in particular to a power generation device.

Background technique

Bearing is a typical mechanical basic part, which is widely used in the fields of machinery, vehicles, aerospace, ships and energy; however, bearing is also one of the most vulnerable parts in rotating machines, and 30% of rotating machinery failures % is caused by bearing failure. Therefore, the state monitoring and early fault diagnosis of bearings have attracted people's attention. On-line monitoring of bearing status has gradually become an indispensable technology in the fields of large wind turbines, ships, high-speed rail, and aircraft. The indicators to be monitored include temperature, vibration, speed, and noise. Early bearing monitoring systems were mainly plug-in. One of the disadvantages was that the distance between the sensor and the signal source was relatively long, and it was a non-contact indirect measurement, so the error was relatively large. In recent years, different forms of embedded monitoring systems have been proposed one after another. This method can solve the problem of measurement accuracy and accuracy, but it needs to change the structure or integrity of related equipment in order to install the sensor monitoring system, which is not only easy Problems such as stress concentration of equipment parts can not be realized on some equipment with complex structure or limited space; the most critical thing is that when the monitoring system needs to rotate with the inner or outer ring of the bearing, it is inconvenient to supply power through wires. And adopt battery power supply time is very short. Therefore, the current bearing monitoring systems are basically non-real-time and indirect non-contact measurements, and it is difficult to obtain the running status of the bearings in a timely and accurate manner.

Contents of the invention

Aiming at various problems existing in the actual application of the existing bearing monitoring system, the utility model provides a power generating device. The embodiment that the utility model adopts is: a kind of power generation device, mainly consists of outer ring, cylindrical roller, bead frame one and bead frame two, inner ring, ring frame one and frame two, ring circuit board one and circuit board two, The first metal sheet and the second metal sheet, the first piezoelectric sheet and the second piezoelectric sheet, the first excited magnet and the second excited magnet, the first exciting magnet and the second exciting magnet are formed. The two ends of the outer ring are provided with inner ring grooves, and the two ends of the inner ring are provided with outer ring grooves, and the outer ring grooves of the two inner rings are respectively installed with skeleton one and skeleton two with radial plates through interference fit; Plate 1 and metal sheet 1 are fixed on the left and right sides of frame 1 by screws, and form a closed radial cavity 1 with frame 1; piezoelectric sheet 1 is bonded to metal sheet 1 and placed in radial cavity 1; excited magnet 1 The piezoelectric sheet 1 and the metal sheet 1 are connected by screws; the piezoelectric sheet 1 and the metal sheet 1 are connected to the circuit board 1 through the wire group 1; the sensor 1 is fixed on the ring frame 1 and placed in the spoke cavity 1; Sensor 1 is connected to circuit board 1 through wire group 2; metal sheet 2 and circuit board 2 are fixed on the left and right sides of frame 2 by screws, and form a closed radial cavity 2 with ring frame 2; piezoelectric sheet 2 is bonded to the metal sheet On the second, and placed in the airtight radial cavity two; the excited magnet two is connected with the piezoelectric sheet two and the metal sheet two through screws; the piezoelectric sheet two and the metal sheet two are connected with the circuit board two through the wire group three; the sensor The second is fixed on the ring frame two and placed in the airtight radial cavity two; the second sensor is connected to the circuit board two through the wire group four; The first exciting magnet and the second excited magnet are facing each other, and the opposite magnetic poles of the two axially adjacent magnets are installed close to each other.

In order to improve the power generation, the radii of the magnets are equal and by the formula Calculated, where: R is the radius of the inner ring raceway of the cylindrical roller bearing, r is the radius of the cylindrical roller, and _n0 is the number of cylindrical rollers, that is, the number of excitation magnet 1 and excitation magnet 2; Called the fixed angle ratio, Q2=360/n ₀ is the angle between the center of two adjacent excitation magnets one or two adjacent excitation magnets two and the connection line between the center of rotation O, Q1 is through the center of rotation O and with the described The included angle between one or two tangent straight lines of the excitation magnet; the preferred fixed angle ratio is k=1.5-3.5.

During the working process, the cylindrical roller rolls with the rotation of the outer ring or the inner ring, and at the same time drives the cylindrical roller and the excitation magnet 1 and the excitation magnet 2 embedded on the cylindrical roller to rotate together, so that the excitation magnet 1 There is relative motion between the first magnet and the second magnet and the second magnet, and the force between the first magnet and the first magnet and the second magnet and the second magnet are generated Change, chasing the bending deformation of piezoelectric sheet 1 and piezoelectric sheet 2 alternately, converting mechanical energy into electrical energy; the electrical energy generated by piezoelectric sheet 1 is output to the energy conversion processing circuit on circuit board 1 through wire group 1, and then The second wire group outputs to the sensor one; the electric energy generated by the piezoelectric sheet one is output to the energy conversion processing circuit on the circuit board two through the third wire group, and then output to the sensor two through the wire group four; thereby realizing the self-power supply of the bearing motion state real-time monitoring.

In order to ensure that the electric energy generated by the energy harvester can meet the self-power supply requirements of the sensor, the electric energy generated by the energy harvester should be increased as much as possible. When the exciting magnet and the excited magnet make a relative rotation, the electric energy generated by a single energy harvester is Where: C _f is the free capacitance of the energy harvester, V _g = ηF is the open circuit voltage generated by the energy harvester, η is a coefficient related to the size and material of the energy harvester, F is the external force on the energy harvester, h=nF ² is called the energy coefficient. Obviously, when other conditions remain unchanged, the voltage can be increased by increasing the external force F on the energy harvester, and the electric energy can be increased by increasing the energy coefficient h. According to the working principle of the utility model cylindrical roller bearing and the actual situation that the magnetic field is spatially distributed, any excited magnet 1 is simultaneously affected by multiple excitation magnets 1, and any excited magnet 2 is simultaneously affected by multiple excitation magnets 2 effect. Therefore, under the condition that other conditions are determined, the force on the first excited magnet and the second excited magnet is related to its corresponding constant angle ratio k, and there is a better fixed angle ratio k such that the force F , voltage V _g , and electric energy E _g are relatively large; when k=1.5-3.5, the obtained voltage and electric energy are relatively large, which can ensure that the energy coefficient is not lower than 1/2 of its maximum value.

Figure 6 shows the experimental curves of the force F on the excited magnet and the angle ratio j=Q3/Q1 at different fixed angle ratios, where Q3 is the clamp between the excited magnet and the line connecting the center of the excited magnet and its center of rotation O angle, so the angle ratio j characterizes the distance between the excited magnet and the exciting magnet. Figure 6 shows that when the fixed angle ratio is different, the magnitude of the force of the excitation magnet and the number of excitations on the excited magnet are different. The relationship curves of the maximum force, excitation times, energy coefficient and fixed angle ratio k are shown in Figure 7. Obviously, when k = 1.5 ~ 3.5, the resulting voltage and electric energy are larger, and the energy coefficient is greater than 1/2 of its maximum value.

The voltage and electric energy generated by the energy harvester are not only related to the force F and the fixed angle ratio k, but also have a great relationship with the action time of the force F. When the force F and the fixed angle ratio k are determined, according to I=Ft, if the action time t of the first or second excitation magnet is too small, the energy harvester will hardly generate voltage and electric energy, and the energy harvesting can be improved by increasing the action time t The momentum of the device. According to the calculation, the revolution time of the cylindrical roller (excitation magnet 1 or 2) is T=120(R+r)/nR, where R is the radius of the inner ring raceway, r is the radius of the cylindrical roller, n(r/min) is the speed of the inner ring (assuming that the speed of the outer ring is 0). Action time t=240(R+r)arctan(r ₀ /(R+r))/nπR, where r ₀ is the radius of the excitation magnet. With the utility model excitation magnet one or two (cylindrical rollers) the same radius of rotation and the time for the excitation magnet of direct relative rotation one revolution is T ₀ =60/n, and the action time is t ₀ =120arctan (r ₀ /(R+ r))/πn, then the time ratio γ=t/r ₀ =2(R+r)/R. Therefore, the utility model can prolong the action time of the first or second excitation magnet, and can increase the voltage and electric energy generated by the energy harvester.

Advantages and features: The bearing itself has a self-powered sensor monitoring function, which is used as an independent standard component without changing the structure of its installation equipment, and can realize real-time online monitoring in the true sense.

Description of drawings

Fig. 1 is a structural sectional view of a cylindrical roller bearing in a preferred embodiment of the present invention;

Figure 2 is a schematic structural view of the inner ring and outer ring of the bearing when no ring frame is installed;

Fig. 3 is the A-A view of Fig. 1;

Fig. 4 is the B-B view of Fig. 1;

Fig. 5 is a structural schematic view of the relative rotation of the excitation magnet and the excited magnet in the utility model;

Fig. 6 is the relationship curve between the force on the excited magnet and the rotation angle ratio at different fixed angle ratios;

Fig. 7 is the relationship curve of energy coefficient, maximum force, number of excitations and fixed angle ratio;

Detailed ways

Aiming at various problems existing in the actual application of the existing bearing monitoring system, the utility model provides a power generating device. The embodiment adopted by the utility model is: a power generating device, mainly composed of outer ring 1, cylindrical roller 2, bead frame one 3 and bead frame two 3', inner ring 4, ring frame one 5 and frame two 5', Ring circuit board one 6 and circuit board two 6', metal sheet one 7 and metal sheet two 7', piezoelectric sheet one 10 and piezoelectric sheet two 10', excited magnet one 11 and excited magnet two 11', excitation Magnet one 8 and excitation magnet two 8' etc. constitute.

In the utility model, the left and right ends of the outer ring 1 are respectively provided with inner ring grooves 101 and 101', and the left and right ends of the inner ring 4 are respectively provided with outer ring grooves 401 and 401'; The ring groove 401 is installed with the ring frame 2 5 provided with the radial plate 501 through interference fit, and the outer hole of the ring frame 2 5 is clearance fit with the right inner ring groove 101 of the outer ring 1; the right outer ring of the inner ring Ring groove 401' is installed with ring frame 2 5' provided with web 501' through interference fit, and the outer hole of ring frame 2 5' is clearance fit with right inner ring groove 101' of outer ring 1; The circuit board one 6 and the metal sheet one 7 are respectively fixed on the left side and the right side of the ring frame one 5 by screws, and together with the ring frame one 5 and the spoke plate 501 form a closed spoke cavity one 502; the piezoelectric sheet one 10 Bonded on the metal sheet-7 and placed in the radial cavity-502; the excited magnet-11 is connected with the piezoelectric sheet-10 and the metal sheet-7 through screws; the piezoelectric sheet-10 and the metal sheet-7 Connect with circuit board one 6 through lead group one 9; Sensor one 13 is fixed on the annular framework one 5, and is placed in radial cavity one 502; Described sensor one 13 is connected with circuit board one 6 through lead group two 12 ; The metal sheet 2 7' and the circuit board 2 6' are fixed on the left and right sides of the ring frame 2 5' by screws respectively, and are connected with the ring frame 2 5' and the spoke plate 501' on the ring frame 2 5' Together form the second airtight radial chamber 502'; the piezoelectric sheet two 10' is bonded to the metal sheet two 7' and placed in the airtight radial chamber two 502'; the excited magnet two 11' passes through the screw and the piezoelectric sheet Two 10' and metal sheet two 7' are connected; the piezoelectric sheet two 10' and metal sheet two 7' are connected to the circuit board two 6' through the wire group three 9'; the sensor two 13' is fixed on the ring frame two 5', and placed in the airtight spoke cavity 2 502'; the sensor 2 13' is connected to the circuit board 2 6' through the wire group 12'; the excitation magnet 1 8 and the excitation magnet 2 8' are embedded in the cylindrical roller On both sides of the sub-2, and respectively with the excited magnet one 11 and the excited magnet two 11 '; between the excited magnet one 11 and the exciting magnet one 8, between the exciting magnet one 8 and the exciting magnet two 8', and The opposite magnetic poles between the excitation magnet 2 8' and the excited magnet 11' are installed close to each other.

In order to improve the power generation, the radii of the magnets are equal and by the formula Calculated, where: R is the radius of the inner ring raceway of the cylindrical roller bearing, r is the radius of the cylindrical roller 2, n ₀ is the number of cylindrical rollers 2, that is, the number of excitation magnet 1 and excitation magnet 2 8'; Called the fixed angle ratio, Q2=360/n ₀ is the angle between the center of two adjacent excitation magnets one 8 or two adjacent excitation magnets two 8' and the connection line between the center of rotation O, Q1 is through the center of rotation O and The included angle between the straight lines tangent to the first excitation magnet 8 or the second 8'; the preferred fixed angle ratio is k=1.5-3.5.

During the working process, the cylindrical roller 2 rolls with the rotation of the outer ring 1 or the inner ring 4, and at the same time drives the cylindrical roller 2 and together with the first excitation magnet 8 and the second excitation magnet 8' embedded on the cylindrical roller Rotate, so that the relative motion between the excitation magnet one 8 and the excited magnet one 11 and the excitation magnet two 8' and the excited magnet two 11' is generated, and the force between the excitation magnet one 8 and the excited magnet one 11 , and the force between the excitation magnet two 8' and the excited magnet two 11' changes, forcing the piezoelectric sheet one 10 and the piezoelectric sheet two 10' to bend and deform alternately, converting mechanical energy into electrical energy; piezoelectric sheet one 10 The generated electric energy is output to the energy conversion processing circuit on the circuit board one 6 through the wire group one 9, and then output to the sensor one 13 through the wire group two 12; the electric energy generated by the piezoelectric sheet one 10' is passed through the wire group three 9' Output to the energy conversion processing circuit on the circuit board 2 6', and then output to the sensor 2 13' through the wire group 4 12'; thereby realizing the self-powered real-time monitoring of the bearing motion state.

In order to ensure that the electric energy generated by the energy harvester can meet the self-power supply requirements of the sensor, the electric energy generated by the energy harvester should be increased as much as possible. When the exciting magnet and the excited magnet make a relative rotation, the electric energy generated by a single energy harvester is Where: C _f is the free capacitance of the energy harvester, V _g = ηF is the open circuit voltage generated by the energy harvester, η is a coefficient related to the size and material of the energy harvester, F is the external force on the energy harvester, h=nF ² is called the energy coefficient. Obviously, when other conditions remain unchanged, the voltage can be increased by increasing the external force F on the energy harvester, and the electric energy can be increased by increasing the energy coefficient h. According to the working principle of the utility model cylindrical roller bearing and the actual situation that the magnetic field is spatially distributed, any excited magnet 11 is simultaneously affected by a plurality of excited magnets 11, and any excited magnet 11' is simultaneously affected by multiple excitation magnets 11'. Two excitation magnets with two 8' functions. Therefore, under the condition that other conditions are determined, the force on the first excited magnet 11 and the second excited magnet 11' is related to its corresponding fixed angle ratio k, and there is a better fixed angle ratio k such that The force F, the voltage V _g , and the electric energy E _g are relatively large. In the utility model, when the preferred fixed angle ratio is k=1.5-3.5, the obtained voltage and electric energy are relatively large.

Figure 6 shows the experimental curves of the force F on the excited magnet and the angle ratio j=Q3/Q1 at different fixed angle ratios, where Q3 is the clamp between the excited magnet and the line connecting the center of the excited magnet and its center of rotation O angle, so the angle ratio j characterizes the distance between the excited magnet and the exciting magnet. Figure 6 shows that when the fixed angle ratio is different, the magnitude of the force of the excitation magnet and the number of excitations on the excited magnet are different. The relationship curves of the maximum force, excitation times, energy coefficient and fixed angle ratio k are shown in Figure 7. Obviously, when k = 1.5 ~ 3.5, the resulting voltage and electric energy are larger, and the energy coefficient is greater than 1/2 of its maximum value.

The voltage and electric energy generated by the energy harvester are not only related to the force F and the fixed angle ratio k, but also have a great relationship with the action time of the force F. When the force F and the fixed angle ratio k are determined, according to I=Ft, if the action time t of the excitation magnet 1 or 2 8' is too small, the energy harvester will hardly generate voltage and electric energy, which can be improved by increasing the action time t Impulse to piezoelectric sheet. According to the calculation, the revolution time of the cylindrical roller 2 (excitation magnet one 8 or two 8') is T=120(R+r)/nR, where R is the radius of the inner ring 4 raceway, r is the radius of the cylindrical roller 2, n(r/min) is the speed of inner ring 4 (assuming that the speed of outer ring 1 is 0). Action time t=240(R+r)arctan(r ₀ /(R+r))/nπR, where r ₀ is the radius of the excitation magnet. With the utility model excitation magnet one 8 or two 8' (cylindrical rollers 2) the same radius of rotation and the time for the excitation magnet that directly rotates relative to one revolution is T ₀ =60/n, and the action time is t ₀ =120arctan (r ₀ /(R+r))/πn, then the time ratio γ=t/t ₀ =2(R+r)/R. Therefore, the utility model can prolong the action time of the excitation magnet one 8 or two 8', and can increase the voltage and electric energy generated by the energy harvester.

Claims (3)

1. A power generation device, mainly composed of outer ring, cylindrical roller, bead frame 1 and bead frame 2, inner ring, ring frame 1 and frame 2, ring circuit board 1 and circuit board 2, metal sheet 1 and metal sheet 2 1, piezoelectric sheet 1 and piezoelectric sheet 2, excited magnet 1 and excited magnet 2, excitation magnet 1 and excitation magnet 2, etc. It is characterized in that: the two ends of the outer ring are provided with inner ring grooves, and the inner ring has two There is an outer ring groove at the end, and the outer ring grooves of the two inner rings are respectively installed with frame one and frame two with radial plates through interference fit; circuit board one and metal sheet one are fixed on the left and right sides of frame one by screws, and Consists of a closed radial cavity 1 with the skeleton 1; the piezoelectric sheet 1 is bonded to the metal sheet 1 and placed in the radial cavity 1; the excited magnet 1 is connected with the piezoelectric sheet 1 and the metal sheet 1 through screws; the piezoelectric sheet 1 And the metal sheet one is connected with the circuit board one through the wire group one; the sensor one is fixed on the ring frame one and placed in the radial cavity one; the said sensor one is connected with the circuit board one through the wire group two; the metal sheet two and the circuit The plate 2 is fixed on the left and right sides of the frame 2 by screws, and forms a closed radial cavity 2 with the annular frame 2; the piezoelectric sheet 2 is bonded to the metal sheet 2 and placed in the sealed radial cavity 2; the excited magnet 2 passes through the The screw is connected to the second piezoelectric sheet and the second metal sheet; the second piezoelectric sheet and the second metal sheet are connected to the second circuit board through the third wire group; the second sensor is fixed on the ring frame second and placed in the airtight radial cavity two; The sensor two is connected to the circuit board two through the wire group four; the excitation magnet one and the excitation magnet two are respectively embedded in the cage one and the cage two, and are respectively facing the excited magnet one and the excited magnet two, and the The opposite poles of two adjacent magnets in each axial direction are installed close to each other. the 2. A kind of power generating device according to claim 1, characterized in that: the radii of the magnets are equal and given by the formula Calculated, where: R is the radius of the inner ring raceway of the cylindrical roller bearing, r is the radius of the cylindrical roller, n ₀ is the number of cylindrical rollers; Called the fixed angle ratio, Q2=360/n ₀ is the angle between the center of two adjacent excitation magnets one or two adjacent excitation magnets two and the connection line between the center of rotation O, Q1 is through the center of rotation O and with the described The included angle between one or two tangent straight lines of the excitation magnet; the preferred fixed angle ratio is k=1.5-3.5. 3. A power generating device according to claim 1, characterized in that the time for one or two revolutions of the excitation magnet is T=120(R+r)/nR, wherein R is the radius of the inner ring raceway, and r is a cylinder The radius of the roller, n(r/min) is the speed of the inner ring, the action time t=240(R+r)arctan(r ₀ /(R+r))/nπR, where r ₀ is the radius of the excitation magnet; and the excitation magnet The time for one/two excitation magnets with the same radius of rotation and direct relative rotation to make one revolution is T ₀ =60/n, and the action time is t ₀ =120arctan(r ₀ /(R+r))/πn, then the time ratio γ= t/t ₀ =2(R+r)/R.