Bearing fault diagnosis test bed

Abstract

The utility model discloses a bearing fault diagnosis test bench, which belongs to the technical field of bearing diagnosis and comprises a clamping rotating assembly, a diagnosis assembly is arranged in the middle of the clamping rotating assembly, and the clamping rotating assembly comprises a main body shell. According to the technical scheme, all parts of a clamping and rotating assembly are matched with one another, expanding, fixing and rotating can be conducted from the interior of the bearing, the bearing can be tightly attached to the inner ring of the bearing through expanding from the interior, it is ensured that the bearing rotates around the precise geometric center of the bearing in the rotating process, vibration caused by eccentricity is effectively reduced, and the service life of the bearing is prolonged. The test bench is very important for high-precision diagnostic tests, and because tiny eccentricity may interfere with the acquisition accuracy of fault characteristic signals such as vibration, temperature and the like, bearings with different inner diameter specifications can be relatively easily adapted by adjusting the expansion range of the expansion mechanism, a complex clamping tool does not need to be frequently replaced, and the universality and the operation convenience of the test bench are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing diagnosis technical field more specifically, relate to a bearing fault diagnosis test bench. BACKGROUND

[0002] In many fields of industrial production, bearings as key basic parts are widely used in various mechanical equipment, and the advantages and disadvantages of their running state are directly related to the performance and reliability of the whole equipment. Once the bearing fails, it will not only cause the equipment to stop and affect the production efficiency, but also may cause a series of secondary failures and cause huge economic losses. The traditional bearing fault diagnosis method mainly relies on manual inspection, and the operator uses simple tools such as stethoscope to judge whether the bearing has abnormal sound, vibration and other problems. However, this method is subjective and has limited detection accuracy, and it is difficult to accurately capture the subtle fault of the bearing in the early stage. At the same time, with the development of modern industry towards high speed, heavy load and intelligentization, the working environment of the bearing is becoming more and more complex, and higher requirements are put forward for the timeliness and accuracy of its fault diagnosis. Although some existing bearing fault diagnosis technologies use sensors and other equipment, the corresponding diagnosis test bench structure is not perfect, and there are still many deficiencies in simulating the actual working condition of the bearing and accurately obtaining fault characteristic information, which cannot meet the growing industrial demand. Therefore, it is urgent to develop a more advanced and efficient bearing fault diagnosis test bench to improve the level of bearing fault diagnosis and ensure the stable operation of industrial production.

[0003] Chinese patent publication number: CN221883050U provides a bearing fault diagnosis test bench convenient to disassemble, which cooperates the positioning turntable, positioning mechanism and rotary control mechanism to make the bearing fixed in the positioning mechanism, and then the positioning turntable is used for rotation, and each bearing is moved to the rotary control mechanism below for test, so that the detection speed and bearing test efficiency are improved. A bearing convenient to disassemble is provided, which cooperates the clamping electric push rod, arc clamping plate, electric push rod two and lifting ring to make the bearing fixed and clamped by the three clamping electric push rods pushing the arc clamping plate, and the bearing can be directly taken off after the test by retracting the output end of the clamping electric push rod and starting the electric push rod two to lift the bearing by the lifting ring, so that the disassembly speed of the bearing during the test on the test bench is effectively improved. However, the detection result is largely dependent on the experience and subjective judgment of the detection personnel, different detection personnel may draw different conclusions on the state of the same bearing, lack of unified standard, and only the surface condition of the bearing can be observed, the wear, crack and other defects of the bearing internal ball, raceway and other parts cannot be directly observed, which is easy to cause missed detection.

[0004] Therefore, a bearing fault diagnosis test bench is proposed to solve the above problems. Utility model content

[0005] In order to overcome the deficiencies of the prior art, the utility model discloses a bearing fault diagnosis test platform, through the mutual cooperation between each part of diagnosis subassembly, through electrostatic capacity detection is extremely sensitive to tiny displacement, gap change, once bearing position has slight change, the capacitance value changes rapidly and triggers feedback adjustment, can make the clamping system respond in very short time, re -stabilize bearing, guarantee rotation stability, effectively capture the abnormal fluctuation caused by instantaneous failure.

[0006] The above technical purposes of the utility model are realized through the following technical schemes:

[0007] A bearing fault diagnosis test platform, including clamping rotation subassembly, the middle part of clamping rotation subassembly is equipped with diagnosis subassembly;

[0008] The clamping rotation subassembly includes a main body shell, a connecting rod is fixedly connected inside the main body shell, a servo motor is fixedly connected to the upper end of the connecting rod, and a driving gear is fixedly connected to the output end of the servo motor.

[0009] Further, the inside of the main body shell is fixedly connected with a hydraulic telescopic rod, the output end of the hydraulic telescopic rod is fixedly connected with a driving rod, the middle part of the driving rod is rotatably connected with a rotating sleeve, the middle part of the rotating sleeve is fixedly connected with a driven gear, the driven gear is meshed with the driving gear, and a driven base is fixedly connected to the middle part of the rotating sleeve and the upper end of the driven gear.

[0010] Further, the upper end of the driving rod and the outside of the rotating sleeve are fixedly connected with a lifting sleeve, a plurality of connecting plates are fixedly connected to the middle part of the lifting sleeve, a pair of hinged rods are hinged to the middle part of each connecting plate, a clamping plate is hinged to one end of each pair of hinged rods, and a strip-shaped sliding limiting rod is fixedly connected to the lower end of each clamping plate.

[0011] Further, the diagnosis subassembly includes a main body support fixedly connected to the middle part of the main body shell, a detection shell is fixedly connected to the upper end of the main body support, a detection rod is slidably connected inside the detection shell, an electrostatic capacity PCB board is fixedly connected to one end inside the detection shell, a booster spring is also fixedly connected inside the detection shell, a detection capacitor sheet is fixedly connected to one end of the detection rod and inside the detection shell, and the detection capacitor sheet is correspondingly arranged with the electrostatic capacity PCB board.

[0012] Further, a plurality of strip-shaped sliding limiting holes are formed in the middle part of the driven base.

[0013] Further, a plurality of strip-shaped sliding limiting rods are slidably connected with a plurality of strip-shaped sliding limiting holes respectively.

[0014] In summary, the utility model has the following beneficial effects:

[0015] (1) this scheme through the mutual cooperation between the parts of clamping rotating assembly, can realize from the inside of bearing expansion fixed and rotating, from inside expansion can closely contact bearing inner ring, ensure in the rotating process bearing rotates around its own accurate geometric center, effectively reduce the vibration caused by eccentric, for high precision diagnosis test is very important, because the tiny eccentricity can interfere with the collection accuracy of vibration, temperature and other fault characteristic signals, by adjusting the expansion range of expansion mechanism, relatively easy to adapt to different inner diameter specifications of bearing, without frequent replacement of complex clamping tool, improve the versatility and operation convenience of test bench.

[0016] (2) this scheme through the mutual cooperation between the parts of diagnosis assembly, through electrostatic capacity detection is extremely sensitive to tiny displacement, clearance change, once bearing position has slight change, the capacitance value changes rapidly and triggers feedback adjustment, can make the clamping system respond in a very short time, re-stabilize the bearing, guarantee the rotation stability, effectively capture the abnormal fluctuation caused by instantaneous failure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic diagram in this embodiment;

[0018] Figure 2 It is the overall split structure schematic diagram in this embodiment;

[0019] Figure 3 It is the main body shell cross section structure schematic diagram in this embodiment;

[0020] Figure 4 It is the main body shell and connecting rod connecting structure schematic diagram in this embodiment;

[0021] Figure 5 It is the drive rod and rotating sleeve split structure schematic diagram in this embodiment;

[0022] Figure 6 It is the lifting sleeve and connecting plate connecting structure schematic diagram in this embodiment;

[0023] Figure 7 It is the lifting sleeve cross section structure schematic diagram in this embodiment;

[0024] Figure 8 It is the diagnosis assembly overall split structure schematic diagram in this embodiment;

[0025] Figure 9 It is the detection shell cross section structure schematic diagram in this embodiment.

[0026] The figure label: 1, clamping rotating assembly; 2, diagnostic assembly; 101, main body shell; 102, connecting rod; 103, servo motor; 104, driving gear; 105, hydraulic telescopic rod; 106, driving rod; 107, rotating sleeve; 108, driven gear; 109, driven base; 110, lifting sleeve; 111, connecting plate; 112, hinged rod; 113, clamping plate; 201, main body support; 202, detection shell; 203, detection rod; 204, static capacitance PCB; 205, booster spring; 206, detection capacitance sheet. DETAILED DESCRIPTION

[0027] The utility model will be described in further detail below in combination with the drawings.

[0028] Wherein same parts are indicated with same reference numerals. It needs to be explained that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific part.

[0029] Referring to Figures 1-9 As shown in the figure, the utility model is a bearing fault diagnosis test bench in a preferred embodiment, comprising clamping rotating assembly 1, the middle part of clamping rotating assembly 1 is equipped with diagnostic assembly 2;

[0030] The clamping rotating assembly 1 includes main body shell 101, the inside of main body shell 101 is fixedly connected with connecting rod 102, the upper end of connecting rod 102 is fixedly connected with servo motor 103, and the output end of servo motor 103 is fixedly connected with driving gear 104.

[0031] Referring to Figures 1-9 As shown in the figure, the inside of main body shell 101 is fixedly connected with hydraulic telescopic rod 105, the output end of hydraulic telescopic rod 105 is fixedly connected with driving rod 106, the middle part of driving rod 106 is rotatably connected with rotating sleeve 107, the middle part of rotating sleeve 107 is fixedly connected with driven gear 108, driven gear 108 is meshingly connected with driving gear 104, and the middle part of rotating sleeve 107 and the upper end of driven gear 108 are fixedly connected with driven base 109.

[0032] Referring to Figures 2-9 As shown in the figure, the upper end of driving rod 106 and the outside of rotating sleeve 107 are fixedly connected with lifting sleeve 110, the middle part of lifting sleeve 110 is fixedly connected with a plurality of connecting plates 111, a pair of hinged rods 112 is hinged to the middle part of each of the plurality of connecting plates 111, one end of each of the pair of hinged rods 112 is hinged with clamping plate 113, and the lower end of each of the plurality of clamping plates 113 is fixedly connected with a strip-shaped sliding limiting rod.

[0033] The present scheme drives the driving rod 106 and the lifting sleeve 110 to move up and down through the telescopic action of the hydraulic telescopic rod 105. The movement of the lifting sleeve 110 is converted into the radial opening and closing action of the clamping plate 113 through the connecting plate 111 and the hinged rod 112. The cooperation of the strip-shaped sliding limiting rod and the strip-shaped sliding limiting hole ensures the stability and accuracy of the movement of the clamping plate 113. This expansion and fixation from the inside of the bearing can tightly fit the inner ring of the bearing, so that the bearing rotates around its accurate geometric center during rotation, effectively reducing the vibration caused by eccentricity and avoiding the interference of eccentricity on the accuracy of the collection of vibration, temperature and other fault characteristic signals. At the same time, by adjusting the telescopic amount of the hydraulic telescopic rod 105, bearings of different inner diameter specifications can be easily adapted, without the need to frequently replace complex clamping tools, thereby improving the versatility and operation convenience of the test bench.

[0034] Referring to Figures 8-9 As shown in the figure, the diagnostic assembly 2 comprises a main support 201 fixedly connected to the middle part of the main housing 101, the upper end of the main support 201 is fixedly connected with a detection housing 202, the inside of the detection housing 202 is slidably connected with a detection rod 203, one end inside the detection housing 202 is fixedly connected with an electrostatic capacitance PCB board 204, the inside of the detection housing 202 is also fixedly connected with a booster spring 205, one end of the detection rod 203 and inside the detection housing 202 is fixedly connected with a detection capacitance sheet 206, the detection capacitance sheet 206 is correspondingly arranged with the electrostatic capacitance PCB board 204;

[0035] When the bearing appears a slight displacement or gap change during rotation, the detection rod 203 will produce a corresponding displacement. Since the detection capacitance sheet 206 is arranged opposite to the electrostatic capacitance PCB board 204, the displacement of the detection rod 203 will cause the distance between the detection capacitance sheet 206 and the electrostatic capacitance PCB board 204 to change, thereby causing the capacitance value to change. The electrostatic capacitance detection is extremely sensitive to such slight displacement and gap change, and the rapid change of the capacitance value can be detected by the electrostatic capacitance PCB board 204 in time and fed back. The function of the booster spring 205 is to ensure that the detection rod 203 and the bearing maintain a certain contact pressure, so that the detection is more sensitive and accurate. In this way, the slight change of the bearing position can be captured in a very short time, and abnormal fluctuations caused by instantaneous faults can be found in time. At the same time, according to the change of the capacitance value, the corresponding feedback adjustment mechanism can be triggered, for example, the clamping system is fine-tuned to re-stabilize the bearing and ensure smooth rotation, thereby providing a reliable basis for early diagnosis of bearing faults.

[0036] Referring to Figures 3-5 As shown in the figure, a plurality of strip-shaped sliding limiting holes are formed in the middle part of the driven base 109.

[0037] Referring to Figures 3-5 As shown in the figure, a plurality of said strip-shaped sliding limit rods are respectively connected with a plurality of strip-shaped sliding limit.

[0038] Specific implementation process: the servo motor 103 is fixed on the connecting rod 102, and the connecting rod 102 is fixed inside the main body shell 101. When the servo motor 103 starts, its output end drives the driving gear 104 to rotate, providing power for the entire rotating system. The hydraulic telescopic rod 105 in the main body shell 101 can perform telescopic action, and its output end is connected with the driving rod 106. The driving rod 106 is rotatably connected with the rotating sleeve 107 in the middle part. The driven gear 108 on the rotating sleeve 107 is engaged with the driving gear 104. Therefore, when the servo motor 103 drives the driving gear 104 to rotate, the driven gear 108 drives the rotating sleeve 107 to rotate around the driving rod 106 through gear engagement transmission. The driven base 109 fixed on the upper end of the driven gear 108 in the middle part of the rotating sleeve 107 also rotates. The lifting sleeve 110 is fixed on the upper end of the driving rod 106 and outside the rotating sleeve 107. The lifting sleeve 110 is hinged with a pair of hinged rods 112 through a plurality of connecting plates 111. One end of each pair of hinged rods 112 is hinged with a clamping plate 113. The strip-shaped sliding limit rod at the lower end of the clamping plate 113 is slidingly connected with the strip-shaped sliding limit hole in the middle part of the driven base 109. When the hydraulic telescopic rod 105 telescopes, the driving rod 106 and the lifting sleeve 110 move up and down, and the up and down movement of the lifting sleeve 110 drives the clamping plate 113 to make radial opening and closing action under the limitation of the strip-shaped sliding limit rod and the limit hole, so as to realize the expansion and fixation from the inside of the bearing, and can rotate with the driven base 109, so that the bearing rotates stably on the test bench. The main support 201 of the diagnosis assembly 2 is fixed in the middle part of the main body shell 101. The detection rod 203 is slidingly connected in the detection housing 202 at the upper end of the main support 201. The static capacitance PCB board 204 is fixed in the detection housing 202 at one end, and the booster spring 205 is also provided. The detection capacitor sheet 206 is fixed at one end of the detection rod 203 in the detection housing 202. The detection capacitor sheet 206 corresponds to the static capacitance PCB board 204. During the rotation of the bearing, when the bearing position has slight change, the detection rod 203 will be affected to produce slight displacement. The displacement of the detection rod 203 will change the distance between the detection capacitor sheet 206 and the static capacitance PCB board 204. Since the static capacitance detection is extremely sensitive to slight displacement and gap change, the distance change will cause the capacitance value to change rapidly. The change of the capacitance value is detected by the static capacitance PCB board 204 and fed back, which can make the relevant control and adjustment system respond in a very short time, for example, to finely adjust the clamping system, to re-stabilize the bearing, to ensure the rotation stability, and to effectively capture the abnormal fluctuation caused by instantaneous failure, to provide basis for judging whether the bearing has failure and the degree and type of the failure.

[0039] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A bearing fault diagnostic test bench comprising a clamped rotating assembly (1), characterized in that: The middle part of the clamping rotating assembly (1) is provided with a diagnosis assembly (2); The clamping rotating assembly (1) comprises a main body shell (101), the inside of the main body shell (101) is fixedly connected with a connecting rod (102), the upper end of the connecting rod (102) is fixedly connected with a servo motor (103), the output end of the servo motor (103) is fixedly connected with a driving gear (104); The diagnosis assembly (2) comprises a main body support (201) fixedly connected in the middle part of the main body shell (101), the upper end of the main body support (201) is fixedly connected with a detection shell (202), the inside of the detection shell (202) is slidably connected with a detection rod (203), one end of the inside of the detection shell (202) is fixedly connected with an electrostatic capacity PCB board (204), the inside of the detection shell (202) is further fixedly connected with a booster spring (205), one end of the detection rod (203) and located in the inside of the detection shell (202) is fixedly connected with a detection capacitor sheet (206), the detection capacitor sheet (206) is correspondingly arranged with the electrostatic capacity PCB board (204).

2. The bearing fault diagnosis test bench according to claim 1, characterized in that: The inside of the main body shell (101) is fixedly connected with a hydraulic telescopic rod (105), the output end of the hydraulic telescopic rod (105) is fixedly connected with a driving rod (106), the middle part of the driving rod (106) is rotatably connected with a rotating sleeve (107), the middle part of the rotating sleeve (107) is fixedly connected with a driven gear (108), the driven gear (108) is meshingly connected with the driving gear (104), the middle part of the rotating sleeve (107) and located at the upper end of the driven gear (108) is fixedly connected with a driven base (109).

3. The bearing fault diagnosis test bench according to claim 2, characterized in that: The upper end of the driving rod (106) and located outside the rotating sleeve (107) is fixedly connected with a lifting sleeve (110), the middle part of the lifting sleeve (110) is fixedly connected with a plurality of connecting plates (111), the middle part of each of the plurality of connecting plates (111) is hingedly connected with a pair of hinged rods (112), one end of each of the pair of hinged rods (112) is hingedly connected with a clamping plate (113), the lower end of each of the plurality of clamping plates (113) is fixedly connected with a strip-shaped sliding limiting rod.

4. The bearing fault diagnosis test bench according to claim 3, characterized in that: The middle part of the driven base (109) is provided with a plurality of strip-shaped sliding limiting holes.

5. The bearing fault diagnosis test bench according to claim 4, characterized in that: The plurality of strip-shaped sliding limiting rods are slidably connected with the plurality of strip-shaped sliding limiting holes respectively.

Images