Detection method for high-temperature dynamic waterproofness of bearing

Abstract

The invention provides a bearing high-temperature dynamic waterproof detection method, and relates to the technical field of bearing waterproof detection methods, and the bearing high-temperature dynamic waterproof detection method comprises the following steps: (I) loading a bearing, (II) injecting a medium, (III) carrying out dynamic simulation, (IV) taking out the bearing, and (V) determining a detection result. The to-be-detected bearing rotates in the high-temperature colored fluid medium, so that the dynamic operation process of the bearing is simulated, the high-temperature dynamic waterproof test of the bearing is realized, and the waterproof performance of the bearing is judged by observing whether the colored fluid medium exists in the to-be-detected bearing after dynamic simulation. The waterproof performance detection effect of the bearing is obvious, the detection result can be judged through observation, and the operation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of bearing waterproof detection methods, and in particular to a bearing high-temperature dynamic waterproof detection method. Background Art

[0002] When the existing motor bearings are running in a high temperature environment, if they encounter rain, the waterproof performance will fail easily, causing water ingress and damage to the motor. Therefore, the waterproof performance of the motor bearings needs to be strictly controlled. The existing methods for deep groove ball bearing waterproof testing mainly include:

[0003] (1) Static immersion test

[0004] The deep groove ball bearing is immersed in water for a certain period of time, and then checked to see if water has entered the bearing to evaluate the waterproof performance of the bearing. This method cannot verify whether the bearing is waterproof when in working condition.

[0005] (2) Dynamic water spray test

[0006] During the operation of the bearing, water with a certain pressure and flow rate is sprayed on the bearing through a nozzle to check whether water has entered the bearing to evaluate the waterproof performance of the bearing. This method fails to simulate the situation where water enters the motor bearing due to heat during operation.

[0007] (3) Pressure difference test

[0008] The bearing is installed in a sealed test device, and a certain air pressure or hydraulic pressure is applied on one side of the bearing to form a pressure difference between the inside and outside of the bearing. The sealing performance and waterproof ability of the bearing are judged by detecting whether there is gas or liquid leaking through the sealing part of the bearing to the other side. This method fails to simulate the situation where water enters the motor bearing due to heat during operation.

[0009] (4) Tracer gas detection method

[0010] Use a specific tracer gas, such as helium, to fill the sealed space where the bearing is located, and then use a gas detection instrument on the other side to detect whether there is tracer gas leakage, so as to judge the sealing performance and waterproof effect of the bearing. This method cannot simulate the situation where the heat generated by the motor bearing during operation causes water to enter.

[0011] (5) Dye penetrant testing method

[0012] Apply or inject a liquid containing a color dye to one side of the bearing. After a period of time, observe whether the dye penetrates the other side of the bearing. If dye appears, it indicates that there is a leakage channel in the bearing and the waterproof performance is poor. This method cannot simulate the situation where water enters the motor bearing due to heat during operation.

[0013] The existing detection methods are unable to realize high-temperature dynamic waterproof detection of motor bearings during operation, and the detection effect is poor. Summary of the invention

[0014] The purpose of the present invention is to provide a bearing waterproof detection method to solve the above-mentioned technical problems existing in the prior art; the preferred technical scheme among the many technical schemes provided by the present invention can produce many technical effects; see the following description for details.

[0015] To achieve the above object, the present invention provides the following technical solutions:

[0016] The present invention provides a method for detecting high-temperature dynamic waterproofness of a bearing, which comprises at least the following steps:

[0017] Step (I), mounting the bearing to be tested on the rotating shaft of the testing device, and fixing the outer ring of the bearing to be tested;

[0018] Step (II), injecting a high-temperature colored fluid medium into the detection device, so that the rotating shaft and the bearing to be detected are completely immersed in the high-temperature colored fluid medium;

[0019] Step (III), the rotating shaft drives the inner ring of the bearing to be tested to rotate;

[0020] Step (IV), removing the bearing to be tested from the rotating shaft and taking it out;

[0021] Step (V), observing whether there is a colored fluid medium in the bearing to be tested, so as to determine whether the bearing to be tested is leaking.

[0022] Preferably, in step (I), the step of mounting the bearing to be tested on a rotating shaft of a testing device comprises:

[0023] The bearing sleeve to be tested is mounted on a mounting position corresponding to the rotating shaft.

[0024] Preferably, the number of the rotating shafts is set to multiple, and all of the rotating shafts have multiple different size specifications, which are suitable for the corresponding models of the bearings to be tested; the fixed sleeve on the rotating shaft is provided with a spacer sleeve, and the number of the spacer sleeves is set to multiple, and all of the spacer sleeves are evenly distributed along the axial direction of the rotating shaft, and the section on the rotating shaft located between two adjacent spacers forms the installation position.

[0025] Preferably, in step (I), fixing the outer ring of the bearing to be tested comprises:

[0026] The outer ring of the bearing to be tested is pressed and fixed in a direction perpendicular to the rotation axis by a fixing mechanism.

[0027] Preferably, the fixing mechanism includes an installation component and a clamping component, the clamping component is arranged on the installation component and can clamp the outer ring of the bearing to be detected; the clamping component includes a guide member, a clamping member and an elastic member, the guide member is arranged on the installation component along the radial sliding direction of the rotating shaft; the clamping member is fixedly arranged on the end of the guide member close to the rotating shaft, and moves synchronously with the guide member, and a positioning groove is provided on the clamping member, and the positioning groove is adapted to the outer ring of the bearing to be detected; the elastic member is sleeved on the guide member, and its two ends are respectively abutted against the installation component and the clamping member, when the clamping member presses the outer ring of the bearing to be detected, the elastic member is in a deformed state, and the clamping direction of the clamping member on the bearing to be detected is perpendicular to the rotating shaft.

[0028] Preferably, in step (II), injecting a high-temperature colored fluid medium into the detection device comprises:

[0029] Inject a fluid medium into the liquid storage chamber of the detection device; add a dye into the fluid medium to form a colored fluid medium; heat the colored fluid medium by a heating device to form a high-temperature colored fluid medium with a temperature between 90 and 95°C; introduce the high-temperature colored fluid medium into the test chamber of the detection device, wherein the rotating shaft is located in the test chamber.

[0030] Preferably, the heating device comprises at least one heating rod, and the heating rod is arranged in the liquid storage cavity.

[0031] Preferably, the liquid storage chamber and / or the test chamber is connected to a gas pressure balance device; and a water temperature alarm device and a water level monitoring device are provided in the test chamber.

[0032] Preferably, in step (III), the rotating shaft drives the inner ring of the bearing to be tested to rotate, which includes:

[0033] The driving mechanism drives the rotating shaft and the inner ring of the bearing to be tested to rotate at a maximum speed in actual use according to a predetermined time.

[0034] Preferably, in step (V), determining whether the bearing to be detected is leaking includes:

[0035] If the colored fluid medium is directly observed in the bearing to be tested, it is determined that the bearing to be tested is leaking;

[0036] If the colored fluid medium is not directly observed in the bearing to be tested, the sealing ring of the bearing to be tested is removed, and the oil fluid medium is observed again in the bearing to be tested;

[0037] If the colored fluid medium is observed to exist in the bearing to be tested for the second time, it is determined that the bearing to be tested is leaking;

[0038] If it is observed for the second time that there is no colored fluid medium in the bearing to be tested, the bearing to be tested is determined to be qualified.

[0039] The present invention provides a method for detecting high-temperature dynamic waterproofness of a bearing, which has at least the following beneficial effects:

[0040] The method for detecting high temperature dynamic waterproofness of a bearing comprises at least the following steps:

[0041] Step (I) is to install the bearing, mount the bearing to be tested on the rotating shaft of the testing equipment, and fix the outer ring of the bearing to be tested, so that the inner ring of the bearing to be tested can rotate relative to its outer ring along the rotating shaft. The inner ring and outer ring that move relative to each other are used to simulate the rotation action of the bearing during dynamic operation.

[0042] Step (II), injecting medium, injecting high-temperature colored fluid medium into the detection equipment, so that the rotating shaft and the bearing to be detected are completely immersed in the high-temperature colored fluid medium. The high-temperature fluid colored medium can simulate the temperature of the bearing during dynamic operation. The use of colored medium facilitates intuitive observation of the fluid flow direction.

[0043] Step (III), dynamic simulation, the rotating shaft drives the inner ring of the bearing to be tested to rotate, thereby realizing the simulation of the dynamic operation process of the bearing to be tested.

[0044] Step (IV), remove the bearing to be tested from the rotating shaft and take it out to facilitate subsequent determination of the test result.

[0045] Step (V) determines the test result, observes whether there is any colored fluid medium infiltrating into the bearing to be tested, and thereby determines whether the bearing to be tested is leaking. The test process is convenient and the result is accurate.

[0046] The present invention makes the bearing to be tested rotate in a high-temperature colored fluid medium, thereby simulating the dynamic operation process of the bearing, thereby realizing a high-temperature dynamic waterproof test of the bearing, and by observing whether the colored fluid medium exists in the bearing to be tested after the dynamic simulation, the waterproof performance of the bearing is determined. Not only is the bearing waterproof performance detection effect significant, but the detection result can be determined by observation, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 It is a schematic flow chart of the detection method of the present invention;

[0049] Figure 2 It is a schematic diagram of the process of determining the result in the detection method of the present invention;

[0050] Figure 3 and Figure 4 It is a structural schematic diagram of the main viewing angle of the present invention;

[0051] Figure 5 It is a schematic diagram of the structure of the internal structure of the present invention from a top view;

[0052] Figure 6 It is an enlarged view of part A of the present invention.

[0053] Reference numerals

[0054] 1. Support device; 11. Machine body; 111. Test chamber; 112. Liquid storage chamber; 12. Moving wheel mechanism; 13. Liquid injection pipe; 14. Liquid discharge pipe; 2. Test device; 21. Rotating shaft; 22. Fixing mechanism; 221. Mounting assembly; 222. Pressing assembly; 2221. Guide member; 2222. Elastic member; 2223. Pressing member; 23. Driving mechanism; 231. Output wheel; 232. Transmission belt; 233. Transmission wheel; 234. Tensioning mechanism; 3. Heating device; 31. Heating rod; 4. Air pressure balance device; 41. Air pressure balance pipe; 5. Control instrument. DETAILED DESCRIPTION

[0055] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0056] Embodiment 1:

[0057] refer to Figure 1 As shown, the present invention provides a method for detecting high-temperature dynamic waterproofness of a bearing, which at least includes the following steps:

[0058] Step (I), mounting the bearing to be tested on the rotating shaft 21 of the testing device, and fixing the outer ring of the bearing to be tested;

[0059] The rotating shaft 21 can drive the inner ring of the bearing to be tested to rotate relative to the outer ring, so as to simulate the rotation action of the bearing in operation.

[0060] Step (II), injecting a high-temperature colored fluid medium into the detection device, so that the rotating shaft 21 and the bearing to be detected are completely immersed in the high-temperature colored fluid medium;

[0061] The high-temperature colored fluid medium can provide a medium for the bearing waterproof test on the one hand, and can simulate the temperature during the operation of the bearing on the other hand. At the same time, the colored medium is used to facilitate intuitive observation of the medium flow direction.

[0062] Step (III), the rotating shaft 21 drives the inner ring of the bearing to be tested to rotate;

[0063] Specifically, the inner ring of the bearing to be tested is placed in a high-temperature colored medium and rotates relative to its outer ring, which can effectively simulate the operation process of the bearing.

[0064] Step (IV), removing the bearing to be tested from the rotating shaft 21 and taking it out;

[0065] The bearing to be inspected is observed outside the inspection device to facilitate determination of the inspection result.

[0066] Step (V), observing whether there is a colored fluid medium in the bearing to be tested, so as to determine whether the bearing to be tested is leaking.

[0067] Since the inside of the bearing contains yellow or white grease, which can absorb colored fluid medium, whether the bearing to be tested is leaking can be determined by observing whether there is a colored fluid medium penetration phenomenon in the bearing to be tested.

[0068] The present invention makes the bearing to be tested rotate in a high-temperature colored fluid medium, thereby simulating the dynamic operation process of the bearing, thereby realizing a high-temperature dynamic waterproof test of the bearing. By observing whether the colored fluid medium exists in the bearing to be tested after the dynamic simulation, the waterproof performance of the bearing is determined. Not only is the bearing waterproof performance detection effect significant, but the detection operation is also convenient.

[0069] Embodiment 2:

[0070] Example 2 is based on Example 1:

[0071] Figure 1 and Figure 2 It is a simplified flow chart of the detection method of the present invention, Figures 3 to 6This is a simplified structural diagram of the detection equipment used in the detection method of the present invention.

[0072] like Figures 1 to 6 As shown, in step (I), the step of installing the bearing to be tested on the rotating shaft 21 of the testing device includes: sleeve-mounting the bearing to be tested on the mounting position corresponding to the rotating shaft 21 .

[0073] Specifically, the detection equipment includes a supporting device 1 and a testing device 2. The supporting device 1 is provided with a testing cavity 111. The testing device 2 includes a rotating shaft 21. A mounting position is provided on the rotating shaft 21. The inner ring of the bearing to be detected is fixedly sleeved on the mounting position and rotates synchronously with the rotating shaft 21.

[0074] As an optional implementation, the number of rotating shafts 21 is set to be multiple, and all rotating shafts 21 have multiple different size specifications, which are suitable for the corresponding models of the bearings to be tested; in this way, the detection of bearings to be tested of different models can be achieved, and the scope of application is wide.

[0075] A fixed sleeve on the rotating shaft 21 is provided with a spacer, and the number of the spacers is set to be multiple, and all the spacers are evenly distributed along the axial direction of the rotating shaft 21, and the section between two adjacent spacers on the rotating shaft 21 forms the installation position; the installation position formed by the spacer can effectively isolate the bearings to be detected, avoid mutual interference between adjacent bearings to be detected, and ensure the accuracy of detection.

[0076] As an optional implementation, in step (I), fixing the outer ring of the bearing to be tested includes: pressing and fixing the outer ring of the bearing to be tested in a direction perpendicular to the rotation axis by a fixing mechanism 22.

[0077] Specifically, each installation position is correspondingly provided with a fixing mechanism 22, and the fixing mechanism 22 adopts a pressing method to fix the outer ring, which has a simple operation and a significant fixing effect.

[0078] As an optional implementation, the fixing mechanism 22 includes a mounting assembly 221 and a pressing assembly 222. The pressing assembly 222 is disposed on the mounting assembly 221 and can press the outer ring of the bearing to be tested.

[0079] Furthermore, the pressing assembly 222 includes a guide member 2221 , a pressing member 2223 and an elastic member 2222 .

[0080] The guide member 2221 is configured as a guide rod, which is slidably disposed on the mounting assembly 221 along the radial direction of the rotating shaft 21 .

[0081] The clamping member 2223 is configured as a clamping plate, which is fixedly disposed at the end of the guide member 2221 close to the rotating shaft 21 and moves synchronously with the guide member 2221. A positioning groove is provided on the side of the clamping member 2223 facing the rotating shaft 21, and the positioning groove is a circular arc groove, which is adapted to the outer ring of the bearing to be detected.

[0082] The elastic member 2222 is configured as a spring, which is sleeved on the guide member 2221, and its two ends are respectively against the mounting assembly 221 and the clamping member 2223. When the clamping member 2223 presses the outer ring of the bearing to be tested, the elastic member 2222 is in a deformed state. The setting of the elastic member 2222, on the one hand, can provide a clamping force for clamping the outer ring of the bearing to be tested, and on the other hand, has a certain amount of compression, which is suitable for bearings of different specifications.

[0083] The bearing to be tested, the spacer sleeve and the rotating shaft 21 are coaxial, and the end face of the spacer sleeve is perpendicular to the pressing direction of the outer ring of the bearing to be tested by the pressing piece 2223, that is, the pressing direction is the radial direction of the bearing to be tested. In this way, during the testing process, the bearing to be tested is not affected by lateral force, which can effectively avoid the problem of misalignment and deformation of the inner and outer rings due to the lateral force on the outer ring, thereby ensuring the accuracy of the testing structure.

[0084] As an optional embodiment, in step (II), injecting a high-temperature colored fluid medium into the detection device comprises:

[0085] Injecting a fluid medium into the liquid storage chamber 112 of the detection device, wherein the fluid medium is tap water or silt water;

[0086] Adding ink or other dyes into the fluid medium to form a colored fluid medium;

[0087] The colored fluid medium is heated by the heating device 3 to form a high-temperature colored fluid medium with a temperature between 90 and 95° C.;

[0088] The high-temperature colored fluid medium is introduced from the liquid storage chamber 112 into the test chamber 111 of the detection device, and the rotating shaft 21 is located in the test chamber 111 .

[0089] Specifically, the heating device 3 includes at least one heating rod 31, and the heating rod 31 is arranged in the liquid storage cavity 112. Preferably, the number of the heating rods 31 is set to be multiple, so that the heating efficiency can be improved.

[0090] The liquid storage chamber 112 is connected to the test chamber 111 through a pipeline. An on-off switch is provided on the pipeline. By controlling the on-off switch, the high-temperature colored fluid medium can be introduced from the liquid storage chamber 112 into the test chamber 111.

[0091] As an optional implementation, the liquid storage chamber 112 and / or the test chamber 111 is connected to a gas pressure balancing device 4 .

[0092] Specifically, the air pressure balancing device 4 includes an air pressure balancing pipe 41, which is arranged on the supporting device 1 and located above the test chamber 111. The air pressure balancing pipe 41 is connected to the test chamber 111, which can effectively ensure that the air pressure inside and outside the equipment is consistent and the internal and external pressures are balanced.

[0093] A water temperature alarm device is provided in the test chamber 111 , and the water temperature alarm device can ensure that the water temperature in the test chamber 111 is constant.

[0094] The liquid storage chamber 112 is connected to an injection pipe 13, which is used to supplement the fluid medium and is provided with a valve. The bottom side of the test chamber 111 is connected to a discharge pipe 14, which is used to discharge the fluid medium and is provided with a valve.

[0095] A water level monitoring device is provided in the test chamber 111. During use, when the water level is lower than the minimum water level, the on-off switch is turned on, and the liquid storage chamber 112 replenishes the high-temperature colored fluid medium into the test chamber 111. The setting of the water level monitoring device can keep the water level within a constant range.

[0096] As an optional implementation, in step (III), the rotating shaft 21 drives the inner ring of the bearing to be tested to rotate, including:

[0097] The driving mechanism 23 drives the rotating shaft 21 and the inner ring of the bearing to be tested to rotate at the highest speed in actual use for a predetermined period of time.

[0098] During actual application, staff sets the preset time according to actual needs.

[0099] Specifically, the test device 2 includes a driving mechanism 23, which includes a power assembly and a belt transmission assembly. An installation cavity is provided inside the support device 1, and the power assembly and the belt transmission assembly are both arranged in the installation cavity. The transmission end of the rotating shaft 21 is inserted into the installation cavity and is drivingly connected to the belt transmission assembly.

[0100] The belt drive assembly includes an output wheel 231, a transmission belt 232, a transmission wheel 233 and a tensioning mechanism 234. The output wheel 231 is connected to the output end of the power assembly; the number of transmission wheels 233 and the rotating shaft 21 are both set to multiple, and the transmission wheel 233 is fixedly sleeved on the end of the corresponding rotating shaft 21. All transmission wheels 233 are connected to the output wheel 231 through the transmission belt 232.

[0101] A test device 2 has a power component and two rotating shafts 21, and the power component drives the rotating shaft 21 to rotate, that is, a belt drive component includes an output wheel 231, a transmission belt 232 and two transmission wheels 233, and two groups of test devices 2 are arranged inside the test chamber 111.

[0102] Preferably, the power assembly is an electric power assembly, and the belt drive assembly can also be replaced by other transmission structures, such as chain drive or gear drive.

[0103] The tensioning mechanism 234 is arranged on the supporting device 1, and includes a tensioning wheel and a tensioning assembly. The tensioning wheel abuts against the transmission belt 232. The tensioning assembly adjusts the tension of the transmission belt 232 by adjusting the abutment force of the tensioning wheel on the transmission belt 232. The tensioning assembly can adopt a swing arm structure, a screw structure, etc., and can also adopt a telescopic assembly such as an oil cylinder or a pneumatic cylinder.

[0104] As an optional implementation, Figure 2 As shown, in step (V), determining whether the bearing to be detected is leaking includes:

[0105] If the colored fluid medium is directly observed in the bearing to be tested, it is determined that the bearing to be tested is leaking;

[0106] If the colored fluid medium is not directly observed in the bearing to be tested, the sealing ring of the bearing to be tested is disassembled and a secondary determination is performed.

[0107] The secondary determination includes:

[0108] A second observation is made to see whether there is oil fluid medium in the bearing to be inspected after the sealing ring is removed;

[0109] If the colored fluid medium is observed to exist in the bearing to be tested for the second time, it is determined that the bearing to be tested is leaking;

[0110] If it is observed for the second time that there is no colored fluid medium in the bearing to be tested, the bearing to be tested is determined to be qualified.

[0111] The two-judgment method is adopted to further ensure the accuracy of the judgment results and reduce misjudgments.

[0112] In addition, the supporting device 1 includes a body 11, which is a sealed body, and can prevent the medium from volatilizing during the high-temperature dynamic waterproof test of the bearing, thereby ensuring the normal operation of other equipment in the equipment room.

[0113] A moving wheel mechanism 12 is provided at the bottom of the body 11, and the supporting device 1 forms a movable supporting device, which is easy to move.

[0114] The bearing high temperature dynamic test device also includes a control instrument 5. The test device 2 and the heating device 3 are both electrically connected to the control instrument 5. The control instrument 5 is provided with a control panel to facilitate the control of the entire device.

[0115] The detection method of the present invention is mainly aimed at deep groove ball bearings.

[0116] Compared with the existing detection methods, the present invention makes up for the inability of the existing technology to detect the high-temperature dynamic waterproofness of the bearing, can promote the improvement of the waterproof performance of the existing bearing, and increase the life of the bearing and the bearing-loading components.

[0117] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0118] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0119] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0120] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for detecting high temperature dynamic waterproofness of a bearing, characterized in that: At least the following steps are included: Step (I), mounting the bearing to be tested on the rotating shaft of the testing device, and fixing the outer ring of the bearing to be tested; Step (II), injecting a high-temperature colored fluid medium into the detection device, so that the rotating shaft and the bearing to be detected are completely immersed in the high-temperature colored fluid medium; Step (III), the rotating shaft drives the inner ring of the bearing to be tested to rotate; Step (IV), removing the bearing to be tested from the rotating shaft and taking it out; Step (V), observing whether there is a colored fluid medium in the bearing to be tested, so as to determine whether the bearing to be tested is leaking.

2. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 1, characterized in that: In step (I), the step of installing the bearing to be tested on the rotating shaft of the testing device includes: sleeve-mounting the bearing to be tested on a mounting position corresponding to the rotating shaft.

3. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 2, characterized in that: The number of the rotating shafts is set to be multiple, and all the rotating shafts have multiple different size specifications, which are suitable for the corresponding models of the bearings to be tested; The fixed sleeve on the rotating shaft is provided with a spacer sleeve, the number of the spacer sleeves is set to be multiple, all the spacer sleeves are evenly distributed along the axial direction of the rotating shaft, and the section on the rotating shaft between two adjacent spacer sleeves forms the installation position.

4. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 1, characterized in that: In step (I), fixing the outer ring of the bearing to be tested includes: pressing and fixing the outer ring of the bearing to be tested in a direction perpendicular to the rotation axis by a fixing mechanism.

5. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 4, characterized in that: The fixing mechanism comprises a mounting assembly and a clamping assembly, wherein the clamping assembly is arranged on the mounting assembly and can clamp the outer ring of the bearing to be tested; The clamping assembly includes a guide member, a clamping member and an elastic member. The guide member is arranged on the mounting assembly to slide radially along the rotating shaft; the clamping member is fixedly arranged at the end of the guide member close to the rotating shaft and moves synchronously with the guide member. A positioning groove is arranged on the clamping member, and the positioning groove is adapted to the outer ring of the bearing to be detected; the elastic member is sleeved on the guide member, and its two ends are respectively abutted against the mounting assembly and the clamping member. When the clamping member presses the outer ring of the bearing to be detected, the elastic member is in a deformed state, and the clamping direction of the clamping member on the bearing to be detected is perpendicular to the rotating shaft.

6. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 1, characterized in that: In step (II), injecting a high-temperature colored fluid medium into the detection device comprises: Injecting a fluid medium into the liquid storage cavity of the detection device; adding a dye into the fluid medium to form a colored fluid medium; The colored fluid medium is heated by a heating device to form a high-temperature colored fluid medium with a temperature between 90 and 95° C.; The high-temperature colored fluid medium is introduced into the test chamber of the detection equipment, and the rotating shaft is located in the test chamber.

7. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 6, characterized in that: The heating device comprises at least one heating rod, and the heating rod is arranged in the liquid storage cavity.

8. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 6, characterized in that: The liquid storage chamber and / or the test chamber are connected with an air pressure balancing device; A water temperature alarm device and a water level monitoring device are arranged in the test chamber.

9. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 1, characterized in that: In step (III), the rotating shaft drives the inner ring of the bearing to be tested to rotate, which includes: The driving mechanism drives the rotating shaft and the inner ring of the bearing to be tested to rotate at a maximum speed in actual use according to a predetermined time.

10. The method for detecting high temperature dynamic waterproofness of a bearing according to claim 1, characterized in that: In step (V), determining whether the bearing to be detected is leaking includes: If the colored fluid medium is directly observed in the bearing to be tested, it is determined that the bearing to be tested is leaking; If the colored fluid medium is not directly observed in the bearing to be tested, the sealing ring of the bearing to be tested is removed, and the oil fluid medium is observed again in the bearing to be tested; If the colored fluid medium is observed to exist in the bearing to be tested for the second time, it is determined that the bearing to be tested is leaking; If it is observed for the second time that there is no colored fluid medium in the bearing to be tested, the bearing to be tested is determined to be qualified.

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