Bearing surface defect detection system and detection method thereof

Abstract

The invention discloses a bearing surface defect detection system and a detection method thereof, and relates to the technical field of bearing surface defect detection.The bearing surface defect detection system comprises a magnetic particle flaw detector body, the magnetic particle flaw detector body comprises a control box, an ultraviolet lamp, a transmission mechanism, a magnetizing device and two symmetrically-distributed carrier rollers, and a bearing is located between the two carrier rollers; the carrier roller comprises a rotating shaft and a mounting cylinder, the mounting cylinder is coaxially fixed to the circumferential side of the rotating shaft, a cavity is formed by the mounting cylinder and the rotating shaft, the rotating shaft is of a hollow structure, and the two ends of the rotating shaft are externally connected with air supply equipment. Through the arrangement of the fixed disc, the adjusting disc, the telescopic piece and the like, the supporting part is suitable for bearings with different widths, the supporting part is only in contact with the two ends of the circumferential side of the bearing, the situation that a conventional supporting part scrapes off magnetic powder on the surface of the bearing due to too many contact points is avoided, and therefore the accuracy of bearing surface defect detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing surface defect detection, and in particular to a bearing surface defect detection system and a detection method thereof. Background Art

[0002] Bearing surface defect detection is an important part of ensuring bearing quality and performance. It mainly detects surface roughness, cracks, corrosion, flaking (peeling), indentations and scratches, deformation and color changes.

[0003] Magnetic particle testing is a non-destructive testing method mainly used for surface and near-surface defect detection of ferromagnetic materials (such as iron, nickel and their alloys). This method is particularly suitable for finding cracks, inclusions and other types of linear defects.

[0004] The Chinese patent with application number 202310849976.5 discloses a magnetic particle flaw detector for bearing rollers. It includes a plurality of rotating rollers arranged on the bearing roller conveyor line; a magnetizing mechanism is used to magnetize the bearing rollers so as to guide the magnetic powder to display the magnetic field; a demagnetizing mechanism is set as a high-voltage oscillating demagnetizer, and the demagnetizing mechanism includes a feeding demagnetizing mechanism and a discharging demagnetizing mechanism. The feeding demagnetizing mechanism is used to demagnetize the bearing rollers before magnetization, and the discharging demagnetizing mechanism is used to demagnetize the bearing rollers after magnetization; an image acquisition and comparison system is used to capture the magnetic powder distribution image on the surface of the bearing roller after spraying the magnetic suspension, and compare the captured image with the reference image in the database to determine the damage of the bearing roller. The magnetic particle flaw detector can automatically complete the flaw detection and flaw identification and judgment of the bearing rollers. The reference atlas database can store a variety of common true and false flaw images. The captured images are compared with the images in the reference atlas database, with good recognition effect and high crack recognition accuracy.

[0005] Similar to the above-mentioned detection device, there are at least the following problems: in order to avoid hard damage between the bearing and the roller, a support part is usually provided on the roller; however, in the process of detecting the bearing, it is found that if a conventional support part is mounted on the roller, there are too many contact points between the support part and the circumferential side of the bearing, so there is a high probability that some of the magnetic powder gathered at the defect will be scraped off by the support part, which not only affects the detection accuracy, but the magnetic powder adsorbed on the support part may also be re-adsorbed on other places on the bearing surface, causing workers to misjudge.

[0006] At the same time, when manufacturers conduct surface defect detection on bearings, there are mainly two types of detection. One is to conduct large-scale detection on the same bearing, and the other is to detect multiple different types of bearings that simulate the working environment. Manufacturers need to record the bearings according to the surface damage of the bearings for subsequent improvements; due to the various types of bearings produced by manufacturers, some special-shaped bearings need to use specific support parts, and try to avoid the angle of the bearing placed on the support part being too eccentric; for example, turbine bearings, chemical pump high-speed bearings, sliding bearings, and inner rings of tapered roller bearings, etc., due to the different diameters at both ends, after being placed on conventional support parts, it is easy to have the problem of one side being higher and the other side being lower. When the bearing rotates, it will not only make the magnetic powder liquid move closer to the lower side, but also because of the excessive eccentricity, it is easy to make the magnetic powder on the bearing surface unevenly distributed, affecting the detection accuracy of the bearing; if the support part is replaced according to different types of bearings, the roller needs to be removed, which is very troublesome.

[0007] To this end, the present invention proposes a bearing surface defect detection system and a detection method thereof to solve the above-mentioned problems. Summary of the invention

[0008] The object of the present invention is to provide a bearing surface defect detection system and a detection method thereof, so as to solve the technical problems raised in the above-mentioned background technology that the conventional support part has too many contact points with the circumferential side of the bearing, and the detection of special-shaped bearings requires replacement of the corresponding support part.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bearing surface defect detection system, comprising a magnetic particle flaw detector body, the magnetic particle flaw detector body comprising a control box, an ultraviolet lamp, a transmission mechanism, a magnetization device and two symmetrically distributed rollers, the bearing is located between the two rollers, the roller comprises a rotating shaft and a mounting cylinder, the mounting cylinder is coaxially fixed to the circumferential side of the rotating shaft and forms a cavity with the rotating shaft, the rotating shaft is a hollow structure and both ends are externally connected to air supply equipment, and the rotating shaft and the mounting cylinder are respectively provided with a plurality of first air holes and a plurality of second air holes connected to the cavity. Two air holes; a plurality of support members equidistantly distributed along the axis of the mounting tubes are arranged on the two mounting tubes, and the support members on the two mounting tubes are arranged in a mirror image, the support members include a fixed disk and an adjusting disk, the diameters of the fixed disk and the adjusting disk are the same, the adjusting disk slides along the axis of the mounting tube, the fixed disk and the adjusting disk are both provided with an integrally formed support part, and the same flexible part is fixedly connected between the two support parts; an annular cavity matching the second air hole is opened inside the fixed disk, and a plurality of telescopic members evenly distributed around the circumference are arranged between the fixed disk and the adjusting disk.

[0010] Preferably, when the rotating shaft is in a gas supply state, gas enters the rotating shaft from one end of the rotating shaft and enters the corresponding annular cavity through the first air hole, the cavity and the second air hole, and the telescopic member extends under the push of the gas and causes the adjusting disk to slide on the mounting cylinder.

[0011] Preferably, the telescopic member includes a coaxially arranged fixed cylinder and a sliding rod, the sliding rod is sealingly and slidingly connected to the fixed cylinder, a plurality of connecting holes penetrating into the annular cavity are opened on one side of the fixed disk, one end of the fixed cylinder is coaxially fixed to the connecting hole, and the end of the sliding rod away from the fixed cylinder is fixedly connected to the adjusting disk.

[0012] Preferably, an annular plate is coaxially fixed on one side opposite to the fixing plate and the adjusting plate, the annular plate is located outside the telescopic member, and one end of the supporting portion is covered on the annular plate.

[0013] Preferably, an adjustment cavity is formed between the fixed disk, the adjustment disk, the mounting cylinder, the support portion and the flexible member, a plurality of through holes connected to the annular cavity are provided on one side of the fixed disk close to the adjustment cavity, the plurality of through holes and the connecting holes are staggered, and a plurality of air outlet holes are provided on the flexible member, when the gas in the annular cavity enters the adjustment cavity through the through holes, the flexible member is deformed and the gas discharged through the air outlet holes cleans the surface of the bearing.

[0014] Preferably, it also includes an electromagnetic control component, which is arranged inside the annular cavity and includes an electromagnetic part, an actuator and a rotating part. After the electromagnetic part is energized, the actuator moves to the side away from the electromagnetic part and causes the rotating part to rotate, so that the connecting hole is blocked by the rotating part and the through hole is connected to the annular cavity.

[0015] Preferably, the electromagnetic part includes an annular electromagnet, an annular mounting seat is coaxially fixed to one side of the annular electromagnet, a plurality of circumferentially evenly distributed mounting strips are arranged on the side of the mounting seat away from the annular electromagnet, and a mounting groove matching the mounting strip is opened on the side of the annular cavity away from the telescopic member.

[0016] Preferably, the actuator comprises an annular movable plate slidably connected to the mounting cylinder, an annular permanent magnet plate is coaxially fixed to one side of the annular movable plate close to the annular electromagnet, and the electromagnetic direction of the annular electromagnet is the same as the polarity of the permanent magnet plate, an elastic member is arranged between the permanent magnet plate and the annular electromagnet to reset the annular movable plate in a direction close to the annular electromagnet, a plurality of arc holes evenly distributed around the circumference are arranged on the annular movable plate, the rotating portion comprises an annular rotating plate, a plurality of first positioning holes matching the connecting holes are arranged on the rotating plate, and a plurality of second positioning holes matching the through holes are arranged on the rotating plate; A ring bar is coaxially fixed to one side of the rotating plate close to the annular moving plate, and a plurality of arc tracks evenly distributed around the circumference are opened on the inner wall of the ring bar. A connecting block matching the arc track is provided on the annular moving plate. When the annular moving plate moves toward the rotating plate, the connecting block moves in the arc track and causes the rotating plate to rotate.

[0017] Preferably, a limiting strip is coaxially fixed to the bottom of one side of the rotating plate close to the connecting hole, a limiting groove matching the limiting strip is provided on the side wall of the annular cavity, and the limiting strip and the limiting groove are clearance-fitted.

[0018] A method for detecting bearing surface defects comprises the following steps: S1: Before the bearing surface defect detection, install the support, electromagnetic control assembly and support part on the two rollers. The specific steps are as follows: S101: Install the electromagnetic control assembly coaxially on the mounting cylinder, and ensure that the rotating part is located close to the direction of the adjustment disk to be installed later, and then install the fixed disk on the mounting cylinder and place the electromagnetic control assembly in the annular cavity. During installation, it is necessary to ensure that the mounting strip on the mounting seat matches the mounting groove on the side wall of the annular cavity, and the first positioning hole is in a connected state with the connecting hole; S102: Install the adjusting disk on the mounting tube, and install the two ends of the plurality of telescopic members on the fixed disk and the side wall of the adjusting disk respectively, wherein the plurality of fixed tubes are respectively fixed in the corresponding connecting holes, and one end of the sliding rod away from the fixed tube is fixedly connected to the side wall of the adjusting disk; S103: Sleeve the support part with the flexible member onto the corresponding fixed plate and the adjusting plate; S2: Detect surface defects on the bearing. The specific steps are as follows: S201: Deeply clean the bearings to remove the oil, rust, oxide layer and pollutants attached to the surface of the bearings; S202: The worker adjusts the distance between the adjustment plate and the fixed plate according to the bearings of different widths. The air supply device ventilates the inside of the rotating shaft and moves the adjustment plate driven by the gas. During the adjustment, the worker observes the movement of the adjustment plate by visual inspection or with the aid of a ruler, and then places the bearing to be tested between the two rollers so that both ends of the bearing are in contact with the corresponding support parts. S203: operate the control box to energize the annular electromagnet so that the annular cavity is connected with the regulating cavity, and start the air supply device to put the rotating shaft into the air supply state. At the same time, start the transmission mechanism to make the two rollers rotate in the same direction, the flexible member stretches and the gas ejected through the air outlet performs secondary cleaning on the surface of the bearing. After the cleaning is completed, the air supply device stops; S3: Detect surface defects of the bearing. The specific steps are as follows: S301: operate the control box to start the magnetization device, use the composite magnetization method to detect the bearing, and spray the magnetic suspension on the surface of the bearing as the bearing rotates, and stop after ensuring that the magnetic suspension is evenly distributed on the bearing surface; S302: Under the irradiation of ultraviolet light, the surface of the bearing is observed. The magnetic powder will gather at the defects of the bearing and show a fluorescent state under the ultraviolet light; S303: After the detection is completed, the bearing is demagnetized and the bearing is removed after ensuring that the demagnetization is completed.

[0019] The beneficial effects of the present invention are: 1. The present invention not only makes the support part suitable for bearings of different widths through the arrangement of a fixed plate, an adjusting plate and a telescopic part, but also the support part only contacts the two ends of the circumferential side of the bearing, thereby avoiding the conventional support part from scraping off the magnetic powder on the bearing surface due to too many contact points, thereby reducing the detection accuracy and reducing the occurrence of misjudgment caused by the support part.

[0020] 2. The present invention uses a support part, an annular plate, a fixed disk and an adjusting disk, and adopts different placement methods to reduce the eccentric angle of the bearing during placement, thereby preventing such bearings from being excessively eccentric after being placed on a conventional support part. At the same time, workers can adjust the distance between the fixed disk and the adjusting disk to accommodate special-shaped bearings of different widths. Workers do not need to remove the rollers multiple times to replace the support part, thereby reducing the workload of workers.

[0021] 3. The present invention is provided with an electromagnetic part, an executive part and a rotating part. After the spacing between the adjusting disk and the fixed disk is adjusted, the worker energizes the electromagnetic part by operating the control box. The executive part moves to one side under the action of the electromagnetic repulsion force and drives the rotating part to rotate a certain angle. At this time, the annular cavity is connected with the adjusting cavity. When the rotating shaft is in the air supply state again, the air pressure in the adjusting cavity increases and causes the flexible part to extend outward. The flexible part gradually approaches the circumferential side of the bearing. The gas ejected from the air outlet cleans the surface of the bearing. At the same time, for bearings with grooves, such as tilting pad bearings, the flexible part can penetrate into the groove to the greatest extent. As the bearing rotates, the air outlet deeply cleans the groove, blows off the floating dust on the bearing surface and the debris adsorbed by static electricity, ensures that these impurities will not affect the detection accuracy when the magnetic suspension is sprayed later, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the main body of the magnetic particle flaw detector in the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the roller in the present invention.

[0024] Figure 3 It is a schematic plan cross-sectional view of the roller and the support member in the present invention.

[0025] Figure 4 It is a three-dimensional half-section schematic diagram of the roller and the support member in the present invention.

[0026] Figure 5 It is a schematic diagram of the cooperation between the telescopic member, the fixed disk and the adjusting disk in the present invention.

[0027] Figure 6 It is a three-dimensional half-section schematic diagram of the support portion and the flexible member in the present invention.

[0028] Figure 7 It is a three-dimensional half-section schematic diagram of the fixed disk in the present invention.

[0029] Figure 8 It is a schematic diagram of the cooperation between a conventional bearing and a support member in the present invention.

[0030] Fig. 9 It is a schematic diagram of the cooperation between the special-shaped bearing and the support member in the present invention.

[0031] Fig.10 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0032] Fig.11 It is a disassembly diagram of the fixed disk and the electromagnetic control assembly in the present invention.

[0033] Fig.12 It is a schematic structural diagram of the rotating part in the present invention.

[0034] The accompanying drawings are marked as follows: 1. Main body of magnetic particle flaw detector; 2. roller; 21. rotating shaft; 211. first air hole; 22. mounting tube; 221. second air hole; 23. cavity; 3. Support member; 31. Fixed plate; 311. Annular cavity; 312. Connecting hole; 313. Through hole; 32. Adjusting plate; 33. Telescopic member; 331. Fixed cylinder; 332. Sliding rod; 34. Annular plate; 35. Adjusting cavity; 4. Support part; 5. Flexible parts; 6. Electromagnetic control assembly; 61. Electromagnetic part; 611. Annular electromagnet; 612. Mounting seat; 62. Actuator; 621. Annular moving plate; 622. Permanent magnet plate; 623. Arc hole; 63. Rotating part; 631. Rotating plate; 632. First positioning hole; 633. Second positioning hole; 634. Annular strip; 635. Limiting strip; 64. Elastic member. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1 In the actual production process, if a conventional support part is used to be sleeved on the roller, there are too many contact points between the support part and the circumferential side of the bearing, so there is a high probability that some of the magnetic powder gathered at the defect will be scraped off by the support part, which not only affects the detection accuracy, but the magnetic powder adsorbed on the support part may also be re-adsorbed on other places on the bearing surface, causing workers to misjudge. This embodiment is specially invented to solve the above problem.

[0037] See also Figure 1 and Figure 2 As shown, a bearing surface defect detection system according to an embodiment of the present invention comprises a magnetic particle flaw detector body 1, the magnetic particle flaw detector body 1 comprises a control box, an ultraviolet lamp, a transmission mechanism, a magnetizing device and two symmetrically distributed rollers 2, a control unit is arranged in the control box, and the magnetic particle flaw detector body 1 also comprises a magnetic powder spraying device and a manual adjustment mechanism, etc., the bearing is located between the two rollers 2, and the two ends of the roller 2 are respectively connected to the transmission mechanism and the manual adjustment structure through a gear set, the transmission mechanism is used to drive the two rollers 2 to rotate in the same direction, and the manual adjustment mechanism controls the height and spacing of the two rollers 2 through a hand wheel to be suitable for bearings of different sizes, all of the above are prior arts and will not be described in detail here.

[0038] See also Figures 2 to 4 As shown, the roller 2 includes a rotating shaft 21 and a mounting cylinder 22. The mounting cylinder 22 is coaxially fixed to the circumferential side of the rotating shaft 21 and forms a cavity 23 with the rotating shaft 21. The rotating shaft 21 is a hollow structure and both ends are externally connected to air supply equipment. Rotary joints are respectively installed at both ends of the rotating shaft 21. The two rotary joints are respectively connected to the air supply equipment through pipelines. A plurality of first air holes 211 and second air holes 221 that are connected to the cavity 23 are respectively provided on the rotating shaft 21 and the mounting cylinder 22. The air supply equipment is connected to the control unit through electrical signals. The worker can operate the control box to make the air supply equipment pressurize or release pressure in the rotating shaft 21.

[0039] See also Figure 3 and Figure 4 As shown, the two mounting cylinders 22 are provided with a plurality of support members 3 equidistantly distributed along the axis of the mounting cylinder 22, and the support members 3 located on the two mounting cylinders 22 are arranged in a mirror image, the support members 3 include a fixed disk 31 and an adjusting disk 32, the fixed disk 31 and the adjusting disk 32 have the same diameter, the adjusting disk 32 slides along the axis of the mounting cylinder 22, the fixed disk 31 and the adjusting disk 32 are both provided with an integrally formed support portion 4, the support portion 4 can be a rubber strip, and the same flexible member 5 is fixedly connected between the two support portions 4.

[0040] Specifically, the fixed disk 31 and the adjusting disk 32 are each composed of two semi-circular disks, which are fixed by bolts, and the fixed disk 31 and the mounting tube 22 are interference fit. When the fixed disk 31 is installed, the fixed disk 31 will not move relative to the mounting tube 22, but the adjusting disk 32 and the mounting tube 22 are clearance fit, and sealing support parts 4 are provided on the inner rings of the fixed disk 31 and the adjusting disk 32.

[0041] See also Figures 3 to 7 As shown, an annular cavity 311 matching the second air hole 221 is provided inside the fixed disk 31, and a plurality of circumferentially evenly distributed telescopic members 33 are provided between the fixed disk 31 and the adjusting disk 32. The telescopic members 33 include a coaxially arranged fixed cylinder 331 and a sliding rod 332. The sliding rod 332 is sealingly and slidably connected to the fixed cylinder 331. A plurality of connecting holes 312 penetrating into the annular cavity 311 are provided on one side of the fixed disk 31. One end of the fixed cylinder 331 is coaxially fixed to the connecting hole 312, and the end of the sliding rod 332 away from the fixed cylinder 331 is fixedly connected to the adjusting disk 32.

[0042] During use, for bearings of different widths, the air supply equipment is operated to ventilate the shaft 21 by operating the control box. The gas pressure in the shaft 21 increases, and the gas enters the shaft 21 from one end of the shaft 21 and enters the corresponding annular cavity 311 through the first air hole 211, the cavity 23 and the second air hole 221. The telescopic member 33 extends under the push of the gas and causes the adjusting disk 32 to slide on the mounting tube 22 until the adjusting disk 32 moves to the specified position. During the adjustment process, the worker can assist by visual inspection or using a ruler.

[0043] When the rotating shaft 21 is in the air supply state, multiple adjustment disks 32 move synchronously, and the worker only needs to measure the movement of one of the adjustment disks 32; after the measurement is completed, the cleaned bearing is placed between the two rollers 2 and the two ends of the bearing are in contact with the support part 4, and then the worker uses the control box to make the transmission mechanism drive the two rollers 2 to rotate in the same direction. When the bearing starts to rotate, the magnetic powder spraying device sprays the solution containing magnetic powder on the surface of the bearing, and turns on the ultraviolet lamp in the process to make the magnetic powder fluorescent under the irradiation of the ultraviolet lamp. After ensuring uniform spraying, the transmission mechanism stops, and the worker can observe the surface of the bearing. If there are scratches, pits and shallow internal gaps on the surface of the bearing, the magnetic powder will gather at the defect, and the worker can observe the shape and size of the defect with the naked eye.

[0044] Through the arrangement of the fixed disk 31, the adjusting disk 32 and the telescopic part 33, not only the support part 4 is suitable for bearings of different widths, but also the support part 4 only contacts the two ends of the circumferential side of the bearing, thereby avoiding too many contact points and causing the support part 4 to scrape off the magnetic powder on the bearing surface, thereby reducing the detection accuracy and reducing the occurrence of misjudgment due to the support part 4.

[0045] Embodiment 2 In actual use, it is found that due to the various types of bearings produced by manufacturers, some special-shaped bearings need to use a specific support part 4, and try to avoid the angle of the bearing placed on the support part 4 being too eccentric; for example, turbine bearings, chemical pump high-speed bearings, sliding bearings, and inner rings of tapered roller bearings, etc., due to the different diameters at both ends, after being placed on a conventional support part 4, it is easy to have a problem of one side being higher and the other side being lower. Not only will the magnetic powder liquid move closer to the lower side during rotation, but also due to excessive eccentricity, the magnetic powder on the surface of the bearing will also form a wavy mark during rotation, making the surface magnetic powder of the bearing unevenly distributed, affecting the detection accuracy of the bearing; if the support part 4 is replaced according to different types of bearings, the roller 2 needs to be completely removed, which is very troublesome; further improvements are made on the basis of the above embodiments.

[0046] See also Figure 5 and Figure 7 As shown, an annular plate 34 is coaxially fixed on one side opposite to the fixing plate 31 and the adjusting plate 32 . The annular plate 34 is located outside the telescopic member 33 , and one end of the supporting portion 4 is covered on the annular plate 34 .

[0047] See also Figure 8 and Fig. 9 As shown, for normal bearings, that is, bearings with the same diameter at both ends, when placing the bearings, it is only necessary to make the two ends of the bearing contact with the support parts 4 on the fixed plate 31 and the adjusting plate 32 respectively. For special-shaped bearings, such as tilting pad bearings, since the diameters at both ends are different, the conventional placement method is likely to cause the bearing to be eccentric at a large angle, and problems such as uneven distribution of magnetic powder are likely to occur during the subsequent bearing surface inspection process. Therefore, for this type of bearing, workers can place the end with a larger diameter above the annular plate 34 and the other end above the adjusting plate 32 or the fixed plate 31 to reduce the eccentric angle of the bearing as much as possible, so as to avoid the manufacturer frequently removing the roller 2 to replace the support part 4 due to the inspection of various types of special-shaped bearings.

[0048] It is further supplemented that, for this type of special-shaped bearing, the rotation speed of the two rollers 2 needs to be limited to avoid excessive rotation speed causing uneven distribution of magnetic powder at one end.

[0049] Through the arrangement of the support part 4, the annular plate 34, the fixed disk 31 and the adjusting disk 32, when testing different types of bearings, for special-shaped bearings or bearing inner rings with different diameters at both ends, such as turbine bearings, chemical pump high-speed bearings, sliding bearings and inner rings of tapered roller bearings, different placement methods are used to reduce the eccentricity angle of the bearings during placement, thereby preventing such bearings from being excessively eccentric after being placed on the conventional support part 4. At the same time, workers can adjust the spacing between the fixed disk 31 and the adjusting disk 32 to adapt to special-shaped bearings of different widths, without the need for workers to remove the rollers 2 multiple times to replace the support part 4, thereby reducing the workload of workers.

[0050] Embodiment 3 Since the magnetic particle inspection method has high requirements for the surface cleanliness of the bearing, the bearing needs to be deeply cleaned before the inspection to ensure that the oil, rust, oxide layer and pollutants attached to the surface of the bearing will not affect the inspection; but even after cleaning, during the transportation process of the bearing and after it is placed on the roller 2, dust in the air or pollutants on the workers' gloves may still adhere to the surface of the bearing; further improvements are made on the basis of the above embodiment.

[0051] See also Figure 3 and Figure 7 As shown, an adjustment cavity 35 is formed between the fixed disk 31, the adjustment disk 32, the mounting tube 22, the support portion 4 and the flexible member 5. A plurality of through holes 313 connected to the annular cavity 311 are provided on one side of the fixed disk 31 close to the adjustment cavity 35. The plurality of through holes 313 and the connecting holes 312 are staggered, and a plurality of air outlet holes are provided on the flexible member 5. When the gas in the annular cavity 311 enters the adjustment cavity 35 through the through holes 313, the flexible member 5 is deformed and the gas discharged through the air outlet cleans the surface of the bearing.

[0052] It should be noted that the diameter of the air outlet is relatively small. When the inside of the adjustment chamber 35 is ventilated, the flexible part 5 will deform and move closer to the detection surface of the bearing. At this time, due to the setting of multiple air outlets, the gas ejected from the air outlet blows on the surface of the bearing, so that the flexible part 5 will not completely fit the surface of the bearing. However, for bearings with grooves, the flexible part 5 can penetrate into the grooves, reducing the distance between the air outlet and the grooves, thereby ensuring the cleaning force of the gas on the bearing surface. The main cleaning objects are the floating dust attached to the bearing surface and the debris adsorbed on the bearing surface by static electricity.

[0053] See also Figures 10 to 12As shown, it also includes an electromagnetic control component 6, which is arranged inside the annular cavity 311, including an electromagnetic part 61, an actuator 62 and a rotating part 63. After the electromagnetic part 61 is energized, the actuator 62 moves to the side away from the electromagnetic part 61 and rotates the rotating part 63 by a certain angle, so that the connecting hole 312 is blocked by the rotating part 63 and the through hole 313 is connected to the annular cavity 311.

[0054] See also Fig.10 and Fig.11 As shown, the electromagnetic part 61 includes an annular electromagnet 611, and an annular mounting seat 612 is coaxially fixed on one side of the annular electromagnet 611. A plurality of circumferentially evenly distributed mounting strips are arranged on the side of the mounting seat 612 away from the annular electromagnet 611, and a mounting groove matching the mounting strip is opened on the side of the annular cavity 311 away from the telescopic member 33.

[0055] See also Fig.10 As shown, the execution part 62 includes an annular movable plate 621 slidably connected to the mounting cylinder 22, and an annular permanent magnet plate 622 is coaxially fixed on one side of the annular movable plate 621 close to the annular electromagnet 611, and the electromagnetic direction of the annular electromagnet 611 is the same as the polarity of the permanent magnet plate 622. When the annular electromagnet 611 is energized, the permanent magnet plate 622 is subjected to electromagnetic repulsion and drives the annular movable plate 621 to move in a direction away from the annular electromagnet 611. An elastic member 64 is arranged between the annular movable plate 621 and the annular electromagnet 611 to reset the annular movable plate 621 in a direction close to the annular electromagnet 611. A plurality of arc holes 623 uniformly distributed around the circumference are provided on the annular movable plate 621. The rotating part 63 includes an annular rotating plate 631, and a plurality of first positioning holes 632 matching the connecting holes 312 are provided on the rotating plate 631, and a plurality of second positioning holes 633 matching the through holes 313 are provided on the rotating plate 631.

[0056] See also Fig.10 and Fig.12 As shown, a ring bar 634 is coaxially fixed to one side of the rotating plate 631 close to the annular movable plate 621, and a plurality of arc tracks evenly distributed around the circumference are provided on the inner wall of the ring bar 634. A connecting block matching the arc tracks is provided on the annular movable plate 621. When the annular movable plate 621 moves toward the rotating plate 631, the connecting block moves in the arc track and causes the rotating plate 631 to rotate a certain angle.

[0057] See also Fig.10 As shown, a limiting strip 635 is coaxially fixed to the bottom of one side of the rotating plate 631 close to the connecting hole 312 , a limiting groove matching the limiting strip 635 is provided on the side wall of the annular cavity 311 , and the limiting strip 635 and the limiting groove are clearance-matched.

[0058] See also Fig.10As shown, it should be supplemented that a plurality of circumferentially evenly distributed limit rods are fixed to the side of the annular movable plate 621 close to the annular magnet, and a plurality of limit cylinders matching the limit rods are arranged on the mounting seat 612. The plurality of limit rods slide in the corresponding limit cylinders respectively. When the annular movable plate 621 moves toward the side close to the rotating plate 631, the limit rods and the limit cylinders limit the annular movable plate 621 to prevent it from rotating during the movement.

[0059] During use, after the distance between the adjusting disk 32 and the fixed disk 31 is adjusted, the worker operates the control box to energize the annular electromagnet 611. Under the action of electromagnetic repulsion, the permanent magnet plate 622 drives the annular movable plate 621 away from the annular electromagnet 611. During the movement of the annular movable plate 621, the connecting block moves in the arc track and drives the rotating plate 631 to rotate a certain angle. At this time, the connecting hole 312 is blocked, and the second positioning hole 633 is connected to the through hole 313 to enable the annular cavity 311 and the adjusting cavity 35 to communicate with each other.

[0060] When the rotating shaft 21 is in the air supply state, the gas in the annular cavity 311 enters the regulating cavity 35, and the flexible member 5 stretches under the action of the gas and gradually approaches the circumferential side of the bearing. At the same time, the gas is slowly ejected outward from the air outlet, which prevents the flexible member 5 from completely fitting to the surface of the bearing. The dust on the surface of the bearing and the debris adsorbed by static electricity are only cleaned by the ejected gas.

[0061] Similarly, the flexible member 5 can also be made of a breathable material, which has a plurality of tiny air outlet gaps.

[0062] Through the arrangement of the electromagnetic part 61, the executive part 62 and the rotating part 63, when the distance between the adjusting disk 32 and the fixed disk 31 is adjusted, the worker energizes the electromagnetic part 61 by operating the control box, and the executive part 62 moves to one side under the action of the electromagnetic repulsion force and drives the rotating part 63 to rotate a certain angle. At this time, the annular cavity 311 is connected with the adjusting cavity 35, and when the rotating shaft 21 is in the air supply state again, the air pressure in the adjusting cavity 35 increases and causes the flexible part 5 to extend outward, and the flexible part 5 gradually approaches the circumferential side of the bearing, and the gas ejected from the air outlet cleans the surface of the bearing. Moreover, for bearings with grooves, such as tilting pad bearings, the flexible part 5 can penetrate into the groove to the greatest extent, and as the bearing rotates, the air outlet deeply cleans the groove, blows off the floating dust on the bearing surface and the debris adsorbed by static electricity, and ensures that these impurities will not affect the detection accuracy when the magnetic suspension is sprayed later.

[0063] Embodiment 4 A method for detecting bearing surface defects comprises the following steps: S1: Before the bearing surface defect detection, the support member 3, the electromagnetic control assembly 6 and the support part 4 are installed on the two rollers 2. The specific steps are as follows: S101: Install the electromagnetic control component 6 coaxially on the mounting tube 22, and ensure that the rotating part 63 is located close to the direction of the adjustment disk 32 to be installed later, and then install the fixed disk 31 on the mounting tube 22 and make the electromagnetic control component 6 located in the annular cavity 311. During installation, it is necessary to ensure that the mounting strip on the mounting seat 612 matches the mounting groove on the side wall of the annular cavity 311, and the first positioning hole 632 is in a connected state with the connecting hole 312.

[0064] S102: Install the adjusting disk 32 on the mounting tube 22, and install the two ends of the multiple telescopic parts 33 on the side walls of the fixed disk 31 and the adjusting disk 32 respectively, wherein the multiple fixed tubes 331 are respectively fixed in the corresponding connecting holes 312, and the end of the sliding rod 332 away from the fixed tube 331 is fixedly connected to the side wall of the adjusting disk 32.

[0065] S103 : Sleeve the support part 4 with the flexible member 5 onto the corresponding fixing plate 31 and the adjusting plate 32 .

[0066] S2: Detect surface defects on the bearing. The specific steps are as follows: S201: Clean the bearings to remove the oil, rust, oxide layer and pollutants attached to the surface of the bearings.

[0067] S202: Workers adjust the distance between the adjusting disk 32 and the fixed disk 31 according to the different widths of bearings. The air supply equipment ventilates the interior of the rotating shaft 21 and moves the adjusting disk 32 driven by the gas. When adjusting, the workers observe the movement of the adjusting disk 32 by visual inspection or with the aid of a ruler, and then place the bearing to be tested between the two rollers 2 and make both ends of the bearing contact with the corresponding support parts 4.

[0068] S203: Operate the control box to energize the annular electromagnet 611, so that the annular cavity 311 is connected with the adjustment cavity 35, and start the air supply device to put the rotating shaft 21 into the air supply state. At the same time, start the transmission mechanism to make the two rollers 2 rotate in the same direction, and the flexible member 5 stretches and the gas ejected through the air outlet cleans the surface of the bearing again. After the cleaning is completed, the air supply device stops.

[0069] S3: Detect surface defects of the bearing. The specific steps are as follows: S301: operate the control box to start the magnetization device, use the composite magnetization method to detect the bearing, and spray the magnetic suspension on the surface of the bearing as the bearing rotates, and stop after ensuring that the magnetic suspension is evenly distributed on the bearing surface.

[0070] S302: Under the irradiation of ultraviolet light, the surface of the bearing is observed. Magnetic powder will gather at the defects of the bearing and show a fluorescent state under the ultraviolet light.

[0071] S303: After the detection is completed, the bearing is demagnetized and the bearing is removed after ensuring that the demagnetization is completed.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bearing surface defect detection system, comprising a magnetic particle flaw detector body (1), the magnetic particle flaw detector body (1) comprising a control box, an ultraviolet lamp, a transmission mechanism, a magnetizing device and two symmetrically distributed rollers (2), the bearing being located between the two rollers (2), characterized in that: The roller (2) comprises a rotating shaft (21) and a mounting cylinder (22); the mounting cylinder (22) is coaxially fixed to the circumferential side of the rotating shaft (21) and forms a cavity (23) with the rotating shaft (21); the rotating shaft (21) is a hollow structure and has air supply equipment externally connected to both ends; the rotating shaft (21) and the mounting cylinder (22) are respectively provided with a plurality of first air holes (211) and second air holes (221) that are in communication with the cavity (23); The two mounting cylinders (22) are provided with a plurality of support members (3) equidistantly distributed along the axis of the mounting cylinders (22), and the support members (3) located on the two mounting cylinders (22) are arranged in a mirror image, the support members (3) comprising a fixed disk (31) and an adjusting disk (32), the fixed disk (31) and the adjusting disk (32) having the same diameter, the adjusting disk (32) sliding along the axis of the mounting cylinder (22), the fixed disk (31) and the adjusting disk (32) both being sleeved with an integrally formed support portion (4), and the two support portions (4) being fixedly connected with a same flexible member (5); An annular cavity (311) matching the second air hole (221) is provided inside the fixed disk (31), and a plurality of telescopic parts (33) evenly distributed around the circumference are provided between the fixed disk (31) and the regulating disk (32).

2. A bearing surface defect detection system according to claim 1, characterized in that: When the rotating shaft (21) is in a gas supply state, gas enters the rotating shaft (21) from one end of the rotating shaft (21) and enters the corresponding annular cavity (311) via the first gas hole (211), the cavity (23) and the second gas hole (221), and the telescopic member (33) is extended under the push of the gas and causes the adjustment disk (32) to slide on the mounting cylinder (22).

3. A bearing surface defect detection system according to claim 2, characterized in that: The telescopic member (33) comprises a coaxially arranged fixed cylinder (331) and a sliding rod (332); the sliding rod (332) is sealingly and slidably connected to the fixed cylinder (331); a plurality of connecting holes (312) penetrating into the annular cavity (311) are provided on one side of the fixed disk (31); one end of the fixed cylinder (331) is coaxially fixed to the connecting hole (312); and one end of the sliding rod (332) away from the fixed cylinder (331) is fixedly connected to the adjusting disk (32).

4. A bearing surface defect detection system according to claim 3, characterized in that: An annular plate (34) is coaxially fixed on one side of the fixed disk (31) and the adjusting disk (32) opposite to each other. The annular plate (34) is located outside the telescopic member (33). One end of the support portion (4) is covered on the annular plate (34).

5. A bearing surface defect detection system according to claim 4, characterized in that: An adjusting cavity (35) is formed between the fixed disk (31), the adjusting disk (32), the mounting cylinder (22), the support portion (4) and the flexible member (5); a plurality of through holes (313) communicating with the annular cavity (311) are provided on a side of the fixed disk (31) close to the adjusting cavity (35); the plurality of through holes (313) and the connecting holes (312) are arranged in a staggered manner; and a plurality of air outlet holes are provided on the flexible member (5); when gas in the annular cavity (311) enters the adjusting cavity (35) through the through holes (313), the flexible member (5) is deformed and the gas discharged through the air outlet holes cleans the surface of the bearing.

6. A bearing surface defect detection system according to claim 5, characterized in that: The invention also comprises an electromagnetic control component (6), wherein the electromagnetic control component (6) is arranged inside the annular cavity (311), and comprises an electromagnetic part (61), an actuator (62) and a rotating part (63); when the electromagnetic part (61) is energized, the actuator (62) moves to a side away from the electromagnetic part (61) and causes the rotating part (63) to rotate, so that the connecting hole (312) is blocked by the rotating part (63) and the through hole (313) is connected to the annular cavity (311).

7. A bearing surface defect detection system according to claim 6, characterized in that: The electromagnetic part (61) comprises an annular electromagnet (611), an annular mounting seat (612) being coaxially fixed to one side of the annular electromagnet (611), a plurality of mounting strips evenly distributed around the circumference being provided on a side of the mounting seat (612) away from the annular electromagnet (611), and a mounting groove matching the mounting strip being provided in the annular cavity (311) on a side away from the telescopic member (33).

8. A bearing surface defect detection system according to claim 7, characterized in that: The execution part (62) comprises an annular movable plate (621) slidably connected to the mounting cylinder (22); an annular permanent magnet plate (622) is coaxially fixed to a side of the annular movable plate (621) close to the annular electromagnet (611); the electromagnetic direction of the annular electromagnet (611) is the same as the polarity of the permanent magnet plate (622); an elastic member (64) is provided between the permanent magnet plate (622) and the annular electromagnet (611) to reset the annular movable plate (621) in a direction close to the annular electromagnet (611); a plurality of arc-shaped holes (623) evenly distributed around the circumference are provided on the annular movable plate (621); the rotating part (63) comprises an annular rotating plate (631); a plurality of first positioning holes (632) matching the connecting holes (312) are provided on the rotating plate (631); and a plurality of second positioning holes (633) matching the through holes (313) are provided on the rotating plate (631); An annular bar (634) is coaxially fixed to one side of the rotating plate (631) close to the annular movable plate (621); a plurality of arc tracks evenly distributed around the circumference are provided on the inner wall of the annular bar (634); a connecting block matching the arc tracks is provided on the annular movable plate (621); when the annular movable plate (621) moves in the direction of the rotating plate (631), the connecting block moves in the arc track and causes the rotating plate (631) to rotate.

9. A bearing surface defect detection system according to claim 8, characterized in that: A limiting strip (635) is coaxially fixed to the bottom of one side of the rotating plate (631) close to the connecting hole (312), and a limiting groove matching the limiting strip (635) is provided on the side wall of the annular cavity (311), and the limiting strip (635) and the limiting groove are clearance-matched.

10. A method for detecting bearing surface defects, the method utilizing a bearing surface defect detection system according to any one of claims 1 to 9 to detect bearing surface defects, characterized in that: The following steps are involved: S1: Before detecting the surface defects of the bearing, the support member (3), the electromagnetic control assembly (6) and the support part (4) are installed on the two rollers (2). The specific steps are as follows: S101: The electromagnetic control assembly (6) is coaxially mounted on the mounting tube (22), and the rotating portion (63) is ensured to be located close to the direction of the adjustment disk (32) to be subsequently installed. The fixed disk (31) is then mounted on the mounting tube (22) and the electromagnetic control assembly (6) is located in the annular cavity (311). During installation, it is necessary to ensure that the mounting strip on the mounting seat (612) matches the mounting groove on the side wall of the annular cavity (311), and the first positioning hole (632) is in a communicating state with the connecting hole (312); S102: installing the adjusting disk (32) on the mounting tube (22), and installing the two ends of the plurality of telescopic members (33) on the side walls of the fixed disk (31) and the adjusting disk (32), respectively, wherein the plurality of fixed tubes (331) are respectively fixed in corresponding connection holes (312), and one end of the sliding rod (332) away from the fixed tube (331) is fixedly connected to the side wall of the adjusting disk (32); S103: sleeve the support portion (4) with the flexible member (5) onto the corresponding fixed disk (31) and the adjustment disk (32); S2: Pre-process the bearing before testing. The specific steps are as follows: S201: Deeply clean the bearings to remove the oil, rust, oxide layer and pollutants attached to the surface of the bearings; S202: The worker adjusts the distance between the adjustment disk (32) and the fixed disk (31) according to the bearings of different widths. The air supply device ventilates the interior of the rotating shaft (21) so that the adjustment disk (32) moves under the drive of the gas. During the adjustment, the worker observes the movement of the adjustment disk (32) by visual inspection or with the aid of a ruler. Then, the bearing to be tested is placed between the two rollers (2) so that both ends of the bearing are in contact with the corresponding support parts (4). S203: operating the control box to energize the annular electromagnet (611), so that the annular cavity (311) is connected to the regulating cavity (35), and starting the air supply device to put the rotating shaft (21) into an air supply state. At the same time, starting the transmission mechanism to make the two rollers (2) rotate in the same direction, the flexible member (5) is stretched, and the gas ejected through the air outlet performs secondary cleaning on the surface of the bearing. After the cleaning is completed, the air supply device is stopped; S3: Detect surface defects of the bearing. The specific steps are as follows: S301: operate the control box to start the magnetization device, use the composite magnetization method to detect the bearing, and spray the magnetic suspension on the surface of the bearing as the bearing rotates, and stop after ensuring that the magnetic suspension is evenly distributed on the bearing surface; S302: Under the irradiation of ultraviolet light, the surface of the bearing is observed. The magnetic powder will gather at the defects of the bearing and show a fluorescent state under the ultraviolet light; S303: After the detection is completed, the bearing is demagnetized and the bearing is removed after ensuring that the demagnetization is completed.

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