Bearing sealing performance detection system

Abstract

The utility model provides a bearing sealing performance detection system. The bearing sealing performance detection system comprises a bearing sealing tool and an air tightness detector. The bearing sealing tool is used for placing a to-be-tested bearing and comprises a pressing plate assembly and a sealing pressure sensor. The pressing plate assembly comprises a first pressing plate and a second pressing plate, the first pressing plate is provided with an air duct, and the first pressing plate and the second pressing plate can be close to each other and make sealing contact with the two end faces of the to-be-tested bearing, so that an inner cavity of the to-be-tested bearing can only communicate with the air duct, and the outer side of an oil seal of the to-be-tested bearing is located in the external environment; the sealing pressure sensor is arranged on the first pressing plate and / or the second pressing plate so as to detect that the extrusion force between the pressing plate assembly and the to-be-detected bearing reaches a set value; the air tightness detector is communicated with the air duct and can inflate the inner cavity of the bearing to be detected and detect whether the inner cavity of the bearing to be detected maintains pressure or not. Through the arrangement, the problem of how to detect the sealing performance of the bearing for the speed reducer before installation and use in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of bearing testing, and in particular to a bearing sealing detection system. Background Art

[0002] At present, in some types of bearings, such as the cross roller bearings commonly used in reducers, the bearings play an important supporting and sealing role for reducers. Generally speaking, the bearings are equipped with structures such as oil seals and sealing rings to ensure the sealing of the bearings. When the sealing of the bearings is insufficient, oil seepage and leakage will occur when they are installed in the reducer, which will cause the bearings and the reducer to be unable to be lubricated normally, thereby accelerating the wear of the bearings and greatly shortening their lifespan.

[0003] In order to prevent oil leakage, it is necessary to test the sealing of the bearing before installing and using it. Utility Model Content

[0004] In view of this, the present application provides a bearing sealing detection system to solve the problem of how to perform sealing detection on bearings used in reducers before installation and use in the prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A bearing sealing detection system, comprising a bearing sealing tool and an airtightness detector;

[0007] The bearing sealing tool is used to place the bearing to be tested, and includes a pressure plate assembly and a sealing pressure sensor;

[0008] The pressure plate assembly includes a first pressure plate and a second pressure plate, the first pressure plate is provided with an air passage, the first pressure plate and the second pressure plate can be close to each other and seal-contact with both end surfaces of the bearing to be tested, so that the internal cavity of the bearing to be tested can only communicate with the air passage, and the outer side of the oil seal of the bearing to be tested is located in the external environment;

[0009] The sealing pressure sensor is arranged on the first pressing plate and / or the second pressing plate to detect that the extrusion force between the pressing plate assembly and the bearing to be tested reaches a set value;

[0010] The airtightness detector is in communication with the air passage and can inflate the internal cavity of the bearing to be tested and detect the pressure maintaining degree of the internal cavity of the bearing to be tested.

[0011] Optionally, the airtightness detector comprises:

[0012] An air source, connected to the air passage through an air path and capable of inflating the internal cavity of the bearing to be tested;

[0013] A valve assembly, arranged on the gas path to control the on and off of the gas path;

[0014] The air pressure sensor is arranged on the air path and is used to detect the air pressure of the internal cavity of the bearing to be tested.

[0015] Optionally, the gas circuit includes a main gas circuit and a branch gas circuit, the starting end of the main gas circuit is connected to the gas source, the two branch gas circuits are connected in parallel to the end of the main gas circuit, and the ends of the two branch gas circuits are a test end and a reference end respectively; the air pressure sensor is a differential pressure sensor and is arranged between the two branch gas circuits to detect the air pressure difference between the test end and the reference end; wherein,

[0016] The bearing sealing tooling is provided with two groups, and the air passages of each group are respectively connected with the test end and the reference end. One group of the bearing sealing tooling is used to place the bearing to be tested, and the other group of the bearing sealing tooling is used to place the standard bearing or the bearing to be tested.

[0017] Alternatively, the bearing sealing fixture is provided with a group, the air passage is communicated with the test end, and the reference end is sealed by a blocking member.

[0018] Optionally, the valve assembly includes:

[0019] An electromagnetic pressure reducing valve is arranged on the main gas path;

[0020] A valve island, arranged on the main gas path and farther away from the gas source than the electromagnetic pressure reducing valve;

[0021] A solenoid valve is arranged on the two branch gas lines and controls the on-off of the two branch gas lines.

[0022] Optionally, the air tightness detector further comprises a direct pressure sensor arranged on the main air path, and the direct pressure sensor is located between the valve island and the branch air path.

[0023] Optionally, the air tightness detector also includes a quantitative tank connected to the main gas circuit, the quantitative tank is used to store a quantitative gas and release it into the main gas circuit, and the detection point of the direct pressure sensor is located at the connection point between the quantitative tank and the main gas circuit.

[0024] Optionally, the air tightness detector further comprises a pneumatic triplet disposed on the main air path, wherein the pneumatic triplet is located between the air source and the electromagnetic pressure reducing valve.

[0025] Optionally, the valve assembly includes a pressure gauge, a first solenoid valve, and a second solenoid valve arranged in sequence along the gas flow direction in the gas circuit, and the detection point of the air pressure sensor is located at the connection between the second solenoid valve and the gas circuit.

[0026] Optionally, the bearing sealing tooling further includes a machine base and a drive cylinder;

[0027] The first pressing plate is connected to the machine base, and the sealing pressure sensor is arranged on the first pressing plate;

[0028] The driving cylinder is connected to the machine base, and the second pressing plate is connected to the driving cylinder. The driving cylinder can drive the second pressing plate to move back and forth to approach and move away from the first pressing plate.

[0029] Optionally, it also includes an outer cover arranged on the bearing sealing tooling.

[0030] The bearing sealing detection system provided in the present application includes a bearing sealing tool and an airtightness detector; the bearing sealing tool is used to place the bearing to be tested, and includes a pressure plate assembly and a sealing pressure sensor; the pressure plate assembly includes a first pressure plate and a second pressure plate, the first pressure plate is provided with an air duct, the first pressure plate and the second pressure plate can be close to and in sealing contact with the two end surfaces of the bearing to be tested, so that the internal cavity of the bearing to be tested can only be connected to the air duct, and the outer side of the oil seal of the bearing to be tested is located in the external environment; the sealing pressure sensor is arranged on the first pressure plate and / or the second pressure plate to detect that the extrusion force between the pressure plate assembly and the bearing to be tested reaches a set value; the airtightness detector is connected to the air duct, and can inflate the internal cavity of the bearing to be tested and detect whether the internal cavity of the bearing to be tested is pressurized. With such arrangement, since the sealing performance of the oil seal and sealing ring of the bearing is reflected in preventing the oil in the internal cavity from leaking to the outside, the internal cavity of the bearing to be tested forms a closed space, and the closed space is filled with gas and the air pressure is detected to feedback the sealing performance of the bearing. The internal cavity of the bearing to be tested is sealed by the bearing sealing tool, so that the internal cavity of the bearing to be tested is only connected to the air duct, and the sealing pressure sensor is used to intuitively and quickly determine the degree of squeezing of the bearing to be tested by the first pressure plate and the second pressure plate to meet the sealing requirement. Then, after the air tightness detector fills the air duct with a rated amount of gas, the internal cavity of the bearing to be tested forms a pressurized environment. After the set pressure holding time, the pressure holding degree of the internal cavity of the bearing to be tested is detected to determine whether the sealing performance meets the standard. The air tightness detection reflects the sealing performance of the bearing, which solves the problem of how to perform sealing detection on bearings used for reducers before installation and use in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1A schematic diagram of the structure of a bearing sealing tool provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the inflation of the bearing sealing tool provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of an airtightness detector that can perform a test with a standard part, a center zero point test, and a test without a standard part provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of an airtightness detector capable of performing volume testing provided in an embodiment of the present application;

[0036] Figure 5 A schematic diagram of an airtightness detector capable of performing direct pressure testing and blockage testing provided in an embodiment of the present application.

[0037] exist Figure 1-Figure 5 middle:

[0038] 1. Bearing sealing tool; 2. Air tightness tester; 3. Bearing to be tested;

[0039] 101, first pressing plate; 102, second pressing plate; 103, air passage; 104, machine base; 105, driving cylinder; 106, gap; 107, first tooling mounting plate; 108, second tooling mounting plate; 109, first sealing ring; 110, second sealing ring; 111, bearing placement groove; 112, main air passage; 113, air interface;

[0040] 201, gas source; 202, gas circuit; 203, air pressure sensor; 204, blocking piece; 205, electromagnetic pressure reducing valve; 206, valve island; 207, branch electromagnetic valve; 208, direct pressure sensor; 209, quantitative tank; 210, pneumatic triplex; 211, pressure gauge; 212, first electromagnetic valve; 213, second electromagnetic valve;

[0041] 2021, main gas line; 2022, branch gas line;

[0042] 301, outer circle; 302, inner circle. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] like Figure 1-Figure 2As shown, the embodiment of the present application provides a bearing sealing detection system, including a bearing sealing tool 1 and an airtightness detector 2; the bearing sealing tool 1 is used to place a bearing 3 to be tested, and includes a pressure plate assembly and a sealing pressure sensor; the pressure plate assembly includes a first pressure plate 101 and a second pressure plate 102, the first pressure plate 101 is provided with an air passage 103, the first pressure plate 101 and the second pressure plate 102 can be close to and away from each other, and the first pressure plate 101 and the second pressure plate 102 can be sealed with both end surfaces of the bearing 3 to be tested when they are close to each other. The test bearing 3 is touched so that the internal cavity of the test bearing 3 can only be connected with the air passage 103, and the outer side of the oil seal of the test bearing 3 is located in the external environment; the sealing pressure sensor is arranged on the first pressure plate 101 and / or the second pressure plate 102 to detect that the extrusion force between the pressure plate assembly and the test bearing 3 reaches the set value, thereby ensuring that the pressure plate assembly reliably seals the two end surfaces of the test bearing 3; the airtightness detector 2 is connected with the air passage 103, and can inflate the internal cavity of the test bearing 3 and detect whether the internal cavity of the test bearing 3 is pressurized.

[0045] With such arrangement, since the sealing performance of the oil seal and sealing ring of the bearing is reflected in preventing the oil in the internal cavity from leaking to the outside, the internal cavity of the bearing 3 to be tested forms a closed space, and the closed space is filled with gas and the air pressure is detected to feedback the sealing performance of the bearing. The internal cavity of the bearing 3 to be tested is sealed by the bearing sealing tool 1, so that the internal cavity of the bearing 3 to be tested is only connected to the air duct 103, and the sealing pressure sensor is used to intuitively and quickly determine the degree of compression of the bearing 3 to be tested by the first pressure plate 101 and the second pressure plate 102, and whether the sealing requirement has been met. Then, after the air tightness detector 2 fills the air duct 103 with a rated amount of gas, the internal cavity of the bearing 3 to be tested forms a pressurized environment. After the set pressure holding time, the pressure holding degree of the internal cavity of the bearing 3 to be tested is detected to determine whether the sealing performance meets the standard. The sealing performance of the bearing is reflected by the air tightness detection, which solves the problem of how to perform sealing detection on bearings used for reducers before installation and use in the prior art.

[0046] It should be noted that the first pressing plate 101 and the second pressing plate 102 can be moved closer to or farther from each other, specifically, one of them can be fixed and the other can be movable, or both of them can be movable.

[0047] Regarding how the first pressure plate 101 and the second pressure plate 102 seal the internal cavity of the bearing 3 to be tested, the first pressure plate 101 can be in sealing contact with the end face of the outer ring 301 of the bearing 3 to be tested, and the second pressure plate 102 can be in sealing contact with the end face of the inner ring 302 of the bearing 3 to be tested, so that the sealed operating environment of the bearing 3 to be tested can be simulated, and a gap 106 is formed between the inner ring 302 of the bearing 3 to be tested and the first pressure plate 101, and the gap 106 connects the internal cavity of the bearing 3 to be tested and the air duct 103.

[0048] In a specific embodiment, the bearing sealing tool 1 also includes a base 104 and a drive cylinder 105; the first pressing plate 101 is connected to the base 104, and the sealing pressure sensor is arranged on the first pressing plate 101; the drive cylinder 105 is connected to the base 104, and the second pressing plate 102 is connected to the drive cylinder 105, and the drive cylinder 105 can drive the second pressing plate 102 to move back and forth. Figure 1 As shown by the middle arrow, the second pressure plate 102 can move closer to and away from the first pressure plate 101, or in other words, it can move to a position opposite to the upper and lower positions of the first pressure plate 101. The first pressure plate 101 is provided with a bearing placement groove 111 and an air duct 103, and the air duct 103 is connected to the bearing placement groove 111; a first sealing ring 109 is provided in the bearing placement groove 111, and the first sealing ring 109 can be pressed and contacted with the end face of the outer ring 301 of the bearing 3 to be tested; a second sealing ring 110 is provided on the side of the second pressure plate 102 facing the first pressure plate 101, and the second sealing ring 110 can be pressed and contacted with the end face of the inner ring 302 of the bearing 3 to be tested. The drive cylinder 105 can specifically be in the form of a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder. It should be noted that, Figure 1 In order to intuitively demonstrate the working process of the second pressing plate 102 , two moving positions of the second pressing plate 102 are shown at the same time.

[0049] Moreover, compared with the conventional method of adding an electromagnetic sensor to the outside of the cylinder for detection, or calculating the cylinder stroke to determine whether the seal is in place, the method provided in the present application of determining whether the pressure plate assembly is sealed in place for the bearing 3 to be tested through a sealing pressure sensor is more intuitive and accurate, has a quick response, and can be measured quickly to save time.

[0050] In a preferred embodiment, a first tooling mounting plate 107 is provided on the machine base 104, and the first pressure plate 101 is detachably connected to the first tooling mounting plate 107 by fasteners; a main air duct 112 and an air interface 113 connected to the main air duct 112 are provided in the first tooling mounting plate 107, the main air duct 112 is sealed and connected to the air duct 103, and the air interface 113 is used for the end connection of the air supply path 202; a second tooling mounting plate 108 is provided on the machine base 104, and the second pressure plate 102 is detachably connected to the second tooling mounting plate 108 by fasteners.

[0051] In this way, the position for docking with the air path 202 is set on the first tooling mounting plate 107 which does not need to be disassembled, and the first pressure plate 101 and the second pressure plate 102 are detachable, so it is convenient to replace different types of first pressure plates 101 and second pressure plates 102, so that the size of the first pressure plate 101 and the second pressure plate 102, and the position of the first sealing ring 109 and the second sealing ring 110 are adapted to the target bearing 3 to be tested, so as to adapt to the detection of bearings of different sizes and models.

[0052] The airtightness detector 2 provided in the present application has a variety of settings and can be adapted to a variety of different bearing seal detection methods.

[0053] In a specific embodiment, the airtightness detector 2 includes a controller, an air source 201, a valve assembly and an air pressure sensor 203; the valve assembly and the air pressure sensor 203 are both connected to the controller in communication; the air source 201 is connected to the air passage 103 through the air path 202, and can inflate the internal cavity of the bearing 3 to be tested; the valve assembly is arranged on the air path 202 to control the on-off of the air path 202; the air pressure sensor 203 is arranged on the air path 202 and is used to detect the air pressure of the internal cavity of the bearing 3 to be tested. The air path 202 is an air flow pipeline.

[0054] In this way, the gas source 201 for providing the gas source, the valve composition for controlling the on-off, and the air pressure sensor 203 for detecting the air pressure value are orderly integrated through the connection of the air path 202. The bearing sealing tooling 1 only needs to connect the air path 202 with the air duct 103, which is convenient to use.

[0055] In an optional embodiment, the gas circuit 202 includes a main gas circuit 2021 and a branch gas circuit 2022. The starting end of the main gas circuit 2021 is connected to the gas source 201, and the two branch gas circuits 2022 are connected in parallel to the end of the main gas circuit 2021. The ends of the two branch gas circuits 2022 are a test end and a reference end respectively. The air pressure sensor 203 is a differential pressure sensor and is arranged between the two branch gas circuits 2022 to detect the air pressure difference between the test end and the reference end. The length, diameter and pipeline type of the two branch gas circuits 2022 are consistent.

[0056] in,

[0057] There are two groups of bearing sealing fixtures 1, and the air passages 103 of each group are connected to the test end and the reference end respectively. One group of bearing sealing fixtures 1 is used to place the bearing 3 to be tested, and the other group of bearing sealing fixtures 1 is used to place the standard bearing or the bearing 3 to be tested; the standard bearing is a bearing with a sealing performance that meets the standard, which is used as a reference standard for the test;

[0058] Alternatively, the bearing sealing fixture 1 is provided with a set, the air passage 103 is connected with the test end, and the reference end is sealed by the blocking member 204 .

[0059] With such configuration, the airtightness detector 2 provided in this embodiment can form three detection modes of differential pressure test, such as: Figure 3 As shown;

[0060] The first detection method is testing with standard parts. The bearing to be tested 3 and the standard bearing are placed in the bearing sealing fixture 1 to create an equivalent sealing environment. The controller selects the current detection method to detect the air pressure difference between the internal cavity of the bearing to be tested 3 and the internal cavity of the standard bearing, thereby determining whether the sealing of the bearing to be tested 3 is qualified.

[0061] The second detection method is the center zero point test. The two bearings 3 to be tested are created with an equivalent sealing environment in the bearing sealing fixture 1. The current detection method is selected by the controller to detect the air pressure difference between the internal cavities of the two bearings 3 to be tested. This method can simultaneously measure the two bearings 3 to be tested. The change of the air pressure in the internal cavity of one bearing 3 to be tested relative to the air pressure in the internal cavity of the other bearing 3 to be tested is measured by the differential pressure sensor, with extremely high accuracy of about 1%;

[0062] The third detection method is testing without standard parts. The reference end is sealed. The plug 204 can seal a closed cavity, or the plug 204 can directly seal the pipe opening of the branch gas path 2022. The current detection method is selected by the controller, and the pressure difference change value between the internal cavity of the bearing 3 to be tested and the reference end is detected by the differential pressure sensor.

[0063] It should be noted that the controller performs differential pressure testing through a differential pressure sensor to obtain the sealing degree of the bearing 3 to be tested by detecting the difference △V in the internal cavity volume between the bearing 3 to be tested and the standard bearing, thereby determining the leakage amount, which is converted into:

[0064] Q=ΔP×V×60101325×t

[0065] Q: flow rate ml / min;

[0066] △P: Pa;

[0067] V: volume ml;

[0068] 101325: one standard atmosphere (Pa);

[0069] t: time (s).

[0070] In a specific embodiment, the valve assembly includes a solenoid pressure reducing valve 205, a valve island 206 and a branch solenoid valve 207; the solenoid pressure reducing valve 205 is arranged on the main gas circuit 2021; the valve island 206 is arranged on the main gas circuit 2021 and is farther away from the gas source 201 than the solenoid pressure reducing valve 205; the branch solenoid valve 207 is arranged on two branch gas circuits 2022 and controls the on-off of the two branch gas circuits 2022. The branch solenoid valve 207 can specifically be a two-position four-way solenoid valve or two independent solenoid valves connected in communication.

[0071] Valve Island 206 is an integrated gas-electric control system that integrates multiple solenoid valves, signal processing equipment and other control elements in a compact unit to achieve precise control of airflow. Valve Island 206 can achieve a test chamber volume of only 2ml, shorter test time and higher accuracy.

[0072] With such an arrangement and design of the valve assembly, the various components are orderly integrated on the gas path 202, and the electromagnetic pressure reducing valve 205 can make the air flow out at a uniform speed with little impact, which is suitable for the small volume of the internal cavity of the bearing 3 to be tested and improves the test accuracy; the design of the valve island 206 can also simplify the wiring, improve the reliability and flexibility of the system, and facilitate installation and maintenance; due to the small inflation volume, the electromagnetic valve 207 is arranged close to the test end, which is beneficial to the timely pressure maintenance of the internal cavity of the bearing 3 to be tested and improves the test accuracy.

[0073] In a preferred embodiment, the airtightness detector 2 further includes a direct pressure sensor 208 disposed on the main air path 2021, the direct pressure sensor 208 is located between the valve island 206 and the branch air path 2022, and the direct pressure sensor 208 is connected to the controller for communication. In this way, the direct pressure sensor 208 can intuitively feedback whether the current inflation volume is sufficient, so that the branch solenoid valve 207 responds quickly to close the branch air path 2022.

[0074] A group of bearing sealing tooling 1 is provided, on the basis that the air duct 103 is connected to the test end, and the reference end is sealed by the plug 204. In a preferred embodiment, the airtightness detector 2 also includes a quantitative tank 209 connected to the main gas path 2021, and the quantitative tank 209 is used to store a certain amount of gas and release it into the main gas path 2021. The detection point of the direct pressure sensor 208 is located at the connection between the quantitative tank 209 and the main gas path 2021.

[0075] With such configuration, the airtightness detector 2 provided in this embodiment can be used to form a volume test detection method, such as Figure 4 As shown, by selecting the current detection mode through the controller, the arrangement of the quantitative tank 209 can pass a rated amount of gas to the test end at a time, which is helpful for dealing with the situation where the sudden power outage and the gas source 201 cannot supply gas in time, so as to ensure the progress of the test.

[0076] In a preferred embodiment, the airtightness detector 2 further includes a pneumatic triplet 210 disposed on the main air path 2021, and the pneumatic triplet 210 is located between the air source 201 and the electromagnetic pressure reducing valve 205. In this configuration, the pneumatic triplet 210 ensures that the airflow enters the internal cavity of the bearing 3 to be tested with a stable pressure, and ensures that the airflow is clean, has few impurities, and is free of water droplets, thereby reducing measurement errors and improving test accuracy.

[0077] In another optional embodiment, the valve assembly includes a pressure gauge 211, a first solenoid valve 212 and a second solenoid valve 213 arranged in sequence along the gas flow direction in the gas circuit 202, and the detection point of the air pressure sensor 203 is located at the connection between the second solenoid valve 213 and the gas circuit 202.

[0078] With such configuration, the airtightness detector 2 provided in this embodiment can be used to form a detection mode of direct pressure test and obstruction test, such as Figure 5 As shown;

[0079] In the direct pressure test, the current detection mode is selected by the controller. After the internal cavity of the bearing 3 to be tested is filled to the required air pressure value, the second solenoid valve 213 is closed to maintain the pressure, and the air pressure sensor 203 measures the pressure difference of the internal cavity of the bearing 3 to be tested that changes with time;

[0080] In the blocking test, the current detection mode is selected by the controller. After the internal cavity of the bearing 3 to be tested is filled to the required air pressure value, the second solenoid valve 213 is closed and the air pressure sensor 203 measures the gas reflux flow, which is suitable for roughly measuring the gas reflux flow value and using the standard pressure limit as the standard for classifying the sealing test results as only good or poor.

[0081] It should be noted that since the internal cavity volume of the bearing is very small, it is necessary to measure under stable air pressure to ensure the pressure difference change value. Moreover, such a small volume pressurized space can improve the sensitivity and accuracy of the detection, and the small amount of inflation can also shorten the detection time and improve work efficiency.

[0082] In another preferred embodiment, the bearing sealing detection system also includes an outer cover arranged on the bearing sealing tooling 1. The outer cover can be made of sheet metal. Under the protection of the outer cover, there are few exposed parts on the outside, the probability of accidental human injury is low, and the service life is long.

[0083] It should be noted that, in the bearing sealing detection system provided in the present application, any connection position that requires assembly connection to allow airflow to pass through requires a sealed connection.

[0084] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0085] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0086] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0087] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0088] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0089] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A bearing sealing detection system, characterized in that: It comprises a bearing sealing tool (1) and an airtightness detector (2); The bearing sealing tool (1) is used to place a bearing to be tested (3), and comprises a pressure plate assembly and a sealing pressure sensor; The pressure plate assembly comprises a first pressure plate (101) and a second pressure plate (102), the first pressure plate (101) is provided with an air passage (103), the first pressure plate (101) and the second pressure plate (102) can be close to each other and in sealing contact with both end surfaces of the bearing to be tested (3), so that the internal cavity of the bearing to be tested (3) can only communicate with the air passage (103), and the outer side of the oil seal of the bearing to be tested (3) is located in the external environment; The sealing pressure sensor is arranged on the first pressing plate (101) and / or the second pressing plate (102) to detect whether the squeezing force between the pressing plate assembly and the bearing to be tested (3) reaches a set value; The airtightness detector (2) is in communication with the air passage (103), and is capable of inflating the internal cavity of the bearing to be tested (3) and detecting the degree of pressure maintenance of the internal cavity of the bearing to be tested (3).

2. The bearing sealing detection system according to claim 1, characterized in that: The airtightness detector (2) comprises: An air source (201) is connected to the air passage (103) through an air path (202) and is capable of inflating air into the internal cavity of the bearing (3) to be tested; A valve assembly is arranged on the gas circuit (202) to control the on-off of the gas circuit (202); An air pressure sensor (203) is arranged on the air path (202) and is used to detect the air pressure of the internal cavity of the bearing (3) to be tested.

3. The bearing sealing detection system according to claim 2, characterized in that: The gas circuit (202) comprises a main gas circuit (2021) and a branch gas circuit (2022); the starting end of the main gas circuit (2021) is connected to the gas source (201); the two branch gas circuits (2022) are connected in parallel to the end of the main gas circuit (2021); the ends of the two branch gas circuits (2022) are respectively a test end and a reference end; the air pressure sensor (203) is a differential pressure sensor and is arranged between the two branch gas circuits (2022) to detect the air pressure difference between the test end and the reference end; wherein, The bearing sealing tool (1) is provided with two groups, and the air passages (103) of the respective groups are respectively connected with the test end and the reference end; one group of the bearing sealing tool (1) is used for placing the bearing to be tested (3), and the other group of the bearing sealing tool (1) is used for placing the standard bearing or the bearing to be tested (3); Alternatively, the bearing sealing fixture (1) is provided with a set, the air passage (103) is connected to the test end, and the reference end is sealed by a blocking member (204).

4. The bearing sealing detection system according to claim 3, characterized in that: The valve assembly comprises: An electromagnetic pressure reducing valve (205) is arranged on the main gas path (2021); A valve island (206) is arranged on the main gas path (2021) and is farther away from the gas source (201) than the electromagnetic pressure reducing valve (205); A solenoid valve (207) is provided on the two branch gas paths (2022) and controls the on-off of the two branch gas paths (2022).

5. The bearing sealing detection system according to claim 4, characterized in that: The airtightness detector (2) further comprises a direct pressure sensor (208) arranged on the main air path (2021), and the direct pressure sensor (208) is located between the valve island (206) and the branch air path (2022).

6. The bearing sealing detection system according to claim 5, characterized in that: The airtightness detector (2) further comprises a quantitative tank (209) connected to the main gas path (2021), wherein the quantitative tank (209) is used to store a quantitative amount of gas and release it into the main gas path (2021), and the detection point of the direct pressure sensor (208) is located at the connection point between the quantitative tank (209) and the main gas path (2021).

7. The bearing sealing detection system according to claim 4, characterized in that: The airtightness detector (2) further comprises a pneumatic triplet (210) arranged on the main air path (2021), wherein the pneumatic triplet (210) is located between the air source (201) and the electromagnetic pressure reducing valve (205).

8. The bearing sealing detection system according to claim 2, characterized in that: The valve assembly comprises a pressure gauge (211), a first solenoid valve (212) and a second solenoid valve (213) which are arranged in sequence along the gas flow direction in the gas path (202); the detection point of the air pressure sensor (203) is located at the connection between the second solenoid valve (213) and the gas path (202).

9. The bearing sealing detection system according to claim 1, characterized in that: The bearing sealing tool (1) also includes a machine base (104) and a driving cylinder (105); The first pressing plate (101) is connected to the machine base (104), and the sealing pressure sensor is arranged on the first pressing plate (101); The driving cylinder (105) is connected to the machine base (104), and the second pressing plate (102) is connected to the driving cylinder (105). The driving cylinder (105) can drive the second pressing plate (102) to move back and forth so as to approach and move away from the first pressing plate (101).

10. The bearing sealing detection system according to claim 1, characterized in that: It also comprises an outer cover which is arranged on the bearing sealing tool (1).

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