Bearing quality detection device and method

Abstract

A bearing quality inspection device includes a controller, a power supply, a bearing to be inspected, an image sensor, a first power source, and a second power source. The controller is provided with a power supply, and the first power source and the second power source are connected to the controller. The first power source is connected to the bearing to be inspected, and the second power source is provided with a pressure head. The axis of the bearing to be inspected and the axis of the pressure head are perpendicular to each other. An image sensor is provided on one side of the pressure head. The pressure head and the bearing to be inspected are clamped in position; the power supply controls the pressure head and the second power source to achieve the extension and retraction of the pressure head and the rotation of the bearing to be inspected; the indentation on the bearing to be inspected is captured by the image sensor to obtain an indentation image; the acquired indentation image is transmitted to the controller; and the controller calculates the consistency of the hardness value. This method is suitable for quality inspection of rotating machinery bearings and can quickly and effectively implement bearing quality assessment, improve the reliability of rotating machinery, and reduce overhaul and maintenance costs.

Description

Technical Field

[0001] The present invention relates to the field of rotating machinery monitoring, and in particular to a bearing quality detection device and method. Background Art

[0002] Bearings are a crucial component in modern machinery. Their primary function is to support rotating parts, reduce friction during movement, and ensure rotational accuracy. Bearings are also known as "industrial joints."

[0003] Bearings are important consumables of rotating machinery. On the one hand, their service life is an important guarantee for the safe and stable operation of rotating machinery. On the other hand, the cost of their overhaul and maintenance is huge. Therefore, a quick and effective method to inspect bearing quality plays a very important role in improving the reliability of rotating machinery and reducing the overhaul and maintenance costs.

[0004] Existing bearing inspection and testing technologies are mainly divided into two categories: the first category is bearing quality inspection, which includes the inspection of various inspection items such as dimensional accuracy, rotational accuracy, clearance, vibration, residual magnetism, contact angle, friction torque, and appearance quality of finished bearings. The main disadvantage of this method is that it is difficult to effectively evaluate the service life of bearings, and therefore it is impossible to effectively inspect the quality of bearings; the second category is bearing bench testing, which applies external loads that intensify the operating conditions of the bearings to cause the bearings to fail prematurely, thereby estimating the actual service life of the bearings. The main disadvantage of this method is that it is time-consuming (usually 1,000 to 3,000 hours) and has poor timeliness. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a bearing quality detection device and method; this method is suitable for quality inspection of rotating machinery bearings, can quickly and effectively realize bearing quality assessment, improve the reliability of rotating machinery, and reduce inspection and maintenance costs.

[0006] The present invention is achieved through the following technical solutions: a bearing quality detection device, including a controller, a power supply, a bearing to be detected, an image sensor, a first power source and a second power source; the controller is provided with a power supply, the controller is connected to the first power source and the second power source, the first power source is connected to the bearing to be detected, the second power source is provided with a pressure head, the axis of the bearing to be detected and the axis of the pressure head are arranged perpendicular to each other, and an image sensor is provided on one side of the pressure head.

[0007] Furthermore, the first power source and the second power source are connected, and a display module is provided between the first power source and the second power source.

[0008] Furthermore, the pressure head and the second power source are connected via a screw.

[0009] Furthermore, the image sensor adopts a KEYENCE IV-G500CA sensor.

[0010] Furthermore, the bearing to be detected and the first power source are connected via a rotating shaft.

[0011] Furthermore, both the first power source and the second power source are stepper motors.

[0012] Furthermore, a bottom plate is provided on one side of each of the first power source and the second power source.

[0013] Furthermore, the bearing to be detected and the first power source are connected via a shaft sleeve.

[0014] The present invention also provides a method for a bearing quality inspection device; step 1: clamping the position of the pressure head and the bearing to be inspected;

[0015] Step 2: Use the power supply to control the first power source and the second power source to achieve the extension and retraction of the pressure head and the rotation of the bearing to be tested;

[0016] Step 3: Capture the indentation on the bearing to be inspected by an image sensor to obtain an indentation image;

[0017] Step 4: Transmitting the indentation image obtained in step 3 to the controller;

[0018] Step 5: Calculate the consistency of hardness values ​​through the controller.

[0019] Furthermore, the controller performs image recognition on the indentations of all sampling points based on the indentation image, calculates the hardness values ​​of the sampling points, and performs consistency calculation and discrimination on the hardness values ​​of all sampling points:

[0020]

[0021] where x i is the hardness value obtained from a certain sampling, μ is the average hardness value obtained from all sampling, N is the number of sampling points, and σ is the standard deviation of the hardness value of the bearing outer ring;

[0022] The consistency of the bearing outer ring hardness value is evaluated by the standard deviation σ of the bearing outer ring hardness value.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] The present invention realizes the detection of the bearing to be detected by simultaneously controlling the first power source and the second power source. At the same time, by setting the positional relationship between the bearing to be detected and the pressure head, the accuracy of the device detection is effectively guaranteed, and by setting the image sensor, the real-time capture of the indentation is effectively achieved, which effectively ensures that the device is suitable for the quality inspection of the bearings of rotating machinery. It can not only quickly and effectively realize the bearing quality assessment, improve the reliability of rotating machinery, and reduce the inspection and maintenance costs, but also greatly ensure the safety and stability of the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A system structure diagram of a bearing quality detection device provided by an embodiment of the present invention;

[0027] In the figure: power supply 1, controller 2, first power source 3, bearing to be detected 4, second power source 5, screw 6, pressure head 7, image sensor 8, display module 9. DETAILED DESCRIPTION

[0028] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] Example 1:

[0035] This embodiment provides a bearing quality inspection device, specifically comprising a power supply 1, a controller 2, a first power source 3, a bearing to be inspected 4, a second power source 5, a screw 6, a press head 7, an image sensor 8, and a display module 9. In this embodiment, the first power source 3 and the second power source 5 are both stepper motors, with the first power source 3 controlling rotation and the second power source 5 controlling extension and retraction. Both the first power source 3 and the second power source 5 are controlled by the controller 2. Through the controller 2, this device can effectively implement fully automatic multi-point sampling and testing of the bearing outer ring hardness and hardness consistency determination. In this embodiment, the display module 9 utilizes a display screen for display. Specifically, the first power source 3 controls the bearing to be inspected 4 to rotate at a specified angle, enabling sampling at different positions on the outer ring. The axis of the press head 7 is perpendicular to the outer ring surface of the bearing to be inspected 4. The second power source 5 of the device is connected to a pressure head 7, which is connected to the second power source 5 through an image sensor 8. An image sensor 8 is also provided on one side of the pressure head 7. The hardness detection pressure head 7 is controlled by the second power source 5 to achieve telescopic movement through the screw 6 according to a specified period, so as to apply load at different positions of the outer ring.

[0036] In a more specific use process, the image sensor 8 captures the indentation of the indenter to calculate the hardness value at that point. In this specific embodiment, the image sensor 8 is a KEYENCE IV-G500CA sensor. The controller 2 then performs image recognition on the indentation photos of all sampling points to automatically calculate the hardness values ​​of those points. Specifically, the plastic deformation depth of the indentation is determined through image recognition. Using the Rockwell hardness conversion algorithm, the Rockwell hardness value of the sampling point is converted from the indentation depth. The hardness values ​​of all sampling points are then calculated and verified for consistency (according to Formula 1), and the results are displayed on the display module 9.

[0037]

[0038] where x i is the hardness value obtained from a certain sampling, μ is the average hardness value obtained from all sampling, N is the number of sampling points, and σ is the standard deviation of the hardness value of the bearing outer ring.

[0039] The consistency of the hardness values ​​of the bearing outer ring is evaluated by the standard deviation σ of the hardness values ​​of the bearing outer ring, and the bearing quality is then graded according to Table 1. The first grade has the best quality, and so on.

[0040] Table 1

[0041] Serial number condition grade 1 <![CDATA[σ≤σ c1 ]]> First level 2 <![CDATA[σ c1 <σ≤σ c2 ]]> Second level 3 <![CDATA[σ c2 <σ≤σ c3 ]]> Third level 4 <![CDATA[σ c3 <σ≤σ c4 ]]> Fourth Level

[0042] Among them, σ c1 =0.05mm,σ c2 =0.1mm,σ c3=0.5mm,σ c4 =1.0mm

[0043] When σ is less than or equal to 0.05mm, the grade is first; when σ is greater than 0.05mm and less than or equal to 0.1mm, the grade is second; when σ is greater than 0.1mm and less than or equal to 0.5mm, the grade is third; and when σ is greater than 0.5mm and less than or equal to 1.0mm, the grade is fourth. This method proposes a method and criteria for consistency determination based on the standard deviation of bearing outer ring hardness values. This method is also applicable to the hardness consistency testing of inner and outer rings, rolling elements, cages, and other components of different types of bearings.

[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0045] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present invention and cannot be used to limit the scope of protection of the present invention. Any changes made based on the technical solution in accordance with the technical concept proposed by the present invention fall within the scope of protection of the claims of the present invention.

Claims

1. A bearing quality detection device, characterized in that: The invention comprises a controller (2), a power supply (1), a bearing to be detected (4), an image sensor (8), a first power source (3) and a second power source (5); the controller (2) is provided with a power supply (1), the controller (2) is connected to the first power source (3) and the second power source (5), the first power source (3) is connected to the bearing to be detected (4), the second power source (5) is provided with a pressure head (7), the axis of the bearing to be detected (4) and the axis of the pressure head (7) are arranged perpendicular to each other, and the image sensor (8) is provided on one side of the pressure head (7); The first power source (3) and the second power source (5) are connected, and a display module (9) is provided between the first power source (3) and the second power source (5); The pressure head (7) and the second power source (5) are connected via a screw (6).

2. A bearing quality detection device according to claim 1, characterized in that: The image sensor (8) adopts a KEYENCE IV-G500CA sensor.

3. A bearing quality detection device according to claim 1, characterized in that: The bearing to be tested (4) and the first power source (3) are connected via a rotating shaft.

4. A bearing quality detection device according to claim 1, characterized in that: The first power source (3) and the second power source (5) both adopt stepper motors.

5. A bearing quality detection device according to claim 1, characterized in that: A bottom plate is provided on one side of each of the first power source (3) and the second power source (5).

6. A bearing quality detection device according to claim 1, characterized in that: The bearing to be tested (4) and the first power source (3) are connected via a shaft sleeve.

7. A method based on the device according to any one of claims 1 to 6, characterized in that: Step 1: Clamp the pressure head (7) and the position of the bearing to be tested (4); Step 2: Using a power source to control the first power source (3) to control the pressure head (7) and the second power source (5) to achieve the extension and retraction of the pressure head (7) and the rotation of the bearing to be tested (4); Step 3: Capturing the indentation on the bearing to be inspected (4) by an image sensor (8) to obtain an indentation image; Step 4: transmitting the indentation image obtained in step 3 to the controller (2); Step 5: Calculate the consistency of the hardness value through the controller (2); The controller (2) performs image recognition on the indentations of all sampling points based on the indentation image, calculates the hardness values ​​of the sampling points, and performs consistency calculation and judgment on the hardness values ​​of all sampling points: in is the hardness value obtained from a certain sampling, is the average hardness value obtained from all sampling, N is the number of sampling points, is the standard deviation of the hardness value of the bearing outer ring; Standard deviation of the hardness value of the bearing outer ring , evaluate the consistency of the hardness value of the bearing outer ring.

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