Sealing ring testing device

Abstract

A sealing ring testing device relates to the technical field of performance testing and comprises a driving motor, a testing shell, a first testing shaft, a second testing shaft and a connecting shaft. The driving motor is installed on the test shell, and an output shaft of the driving motor is connected with the first test shaft; the first test shaft and the second test shaft are both rotatably matched with the test shell, and the connecting shaft is connected with the first test shaft and the second test shaft at the same time to transmit torque. The sealing unit is used for being installed between the first test shaft and the test shell, or / and the sealing unit is used for being installed between the second test shaft and the test shell. According to the structural design of the test device, the test cost can be reduced, test conditions of different equipment can be simulated, and the test range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to performance test technical field, specifically, relate to a sealing ring testing device. BACKGROUND

[0002] Rotary shaft lip seal, also known as skeleton oil seal, is widely used in mechanical equipment, and is usually used to seal lubricating oil or lubricating grease in mechanical equipment. Rotary shaft lip seal is applied to shaft parts, which can be used for dynamic sealing and static sealing. When used as dynamic sealing, the sealing ring lip and the rotating shaft rotate relatively, and the lubricating oil or lubricating grease in the mechanical equipment is required to be prevented from leaking. The reliability of the sealing ring directly affects the operation reliability of various mechanical equipment, and its importance in mechanical equipment is very high. The verification of the service life and reliability of the sealing ring usually depends on the test of the sealing part manufacturer, and the test preparation period is long and the cost is high. Sometimes the test conditions that can be realized by the test equipment of the supplier cannot meet the working condition requirements of the user's specific equipment. SUMMARY

[0003] The utility model aims to, for example, provide a sealing ring testing device, which can reduce the test cost, simulate the test conditions of different equipment, and has a wide test range.

[0004] The embodiment of the utility model can be realized as follows:

[0005] In a first aspect, the utility model provides a sealing ring testing device, which is used in cooperation with at least one sealing unit, and comprises a driving motor, a test shell, a first test shaft, a second test shaft and a connecting shaft, wherein:

[0006] The driving motor is installed on the test shell, and the output shaft of the driving motor is connected with the first test shaft; the first test shaft and the second test shaft are rotatably matched with the test shell, and the connecting shaft connects the first test shaft and the second test shaft to transmit torque;

[0007] The sealing unit is installed between the first test shaft and the test shell, or / and the sealing unit is installed between the second test shaft and the test shell.

[0008] In an optional embodiment, the output shaft of the driving motor is provided with a first connecting part, the first test shaft is provided with a second connecting part, one of the first connecting part and the second connecting part is an external spline, and the other is an internal spline capable of engaging with the external spline.

[0009] Based on the above scheme, the output shaft and the first test shaft are connected through the cooperation of the internal spline and the external spline, the connection mode is simple and reliable, and the disassembly and assembly are convenient.

[0010] In an optional embodiment, the connecting shaft is provided as a spline shaft.

[0011] Based on the above scheme, the first test shaft and the second test shaft can be connected with the connecting shaft in a spline structure, the connection mode is simple and reliable, torque transmission is stable, and disassembly and assembly are convenient.

[0012] In an optional embodiment, the sealing ring test device further comprises an adjusting member, the adjusting member is installed on the connecting shaft, and the adjusting member is used to adjust the balance state of the connecting shaft.

[0013] Based on the above scheme, by providing the adjusting member, the balance state of the connecting shaft can be adjusted to be in a non-dynamic balance state, so as to simulate the reliability of the sealing ring under the extreme tolerance working condition.

[0014] In an optional embodiment, the outer circumferential surface of the connecting shaft is provided with a threaded hole, and the adjusting member is screwed with the threaded hole.

[0015] Based on the above scheme, the connection mode of the connecting shaft and the adjusting member is simple and reliable, the adjusting member is not easy to fall off from the connecting shaft when rotating with the connecting shaft, the operation is stable and reliable, and disassembly and assembly are convenient.

[0016] In an optional embodiment, the test shell comprises a first half shell, a connecting ring and a second half shell, the first half shell is connected with the second half shell through the connecting ring, the first test shaft is rotatably connected with the first half shell, the second test shaft is rotatably connected with the second half shell, and the driving motor is installed on the first half shell.

[0017] Based on the above scheme, the test shell is provided as a split structure, the first half shell, the connecting ring and the second half shell are independently machined, the machining precision is high, the machining difficulty is low, the machining efficiency is high, and the difficulty of assembling the first test shaft and the second test shaft on the test shell can also be reduced. Moreover, when a fault occurs, only part of the components can be replaced, thereby reducing the maintenance cost.

[0018] In an optional embodiment, the test shell further comprises a transparent cover, the transparent cover is installed on the second half shell and has a spacing from the end of the second test shaft away from the first test shaft.

[0019] Based on the above scheme, during the test process, the running condition of the second test shaft can be observed through the transparent cover, so that the running condition of the sealing unit located on the second test shaft is observed, and relevant data is obtained. Moreover, the transparent cover can also shield the sealing unit, so that the sealing unit is not polluted by external impurities, and the performance parameters of the sealing ring obtained by testing are more accurate. Since the transparent cover has a spacing from the end of the second test shaft, the second test shaft is not easy to collide with the transparent cover when the second test shaft is axially jumped during rotation, so that the failure rate is reduced and the noise is reduced.

[0020] In an optional embodiment, the sealing ring test device further comprises a heating mechanism, which is installed in the test shell, and is used to adjust the temperature of the lubricating oil in the test shell.

[0021] Based on the above scheme, by adjusting the operating state of the heating mechanism, the sealing medium in the test shell, such as the lubricating oil, can be heated to the required temperature by the heating mechanism, different temperature environments can be simulated, and the running condition of the sealing unit under different temperature environments can be obtained. Moreover, the temperature sensor can be used to monitor the oil temperature in real time, and the temperature information obtained by the temperature sensor can be transmitted to the control system, so that the starting or stopping of the heating mechanism and the driving motor can be controlled according to the temperature change.

[0022] In an optional embodiment, the sealing ring test device further comprises a gas valve and a pressure gauge, both of which are installed in the test shell. The gas valve is used to connect with a gas source to adjust the gas pressure in the test shell, and the pressure gauge is used to obtain the internal gas pressure of the test shell.

[0023] Based on the above scheme, by adjusting the gas pressure in the test shell through the gas valve, dynamic or static test of the sealing ring under different pressure environments can be realized, and the test range is wide. Moreover, the pressure gauge can obtain the gas pressure in the test shell in real time, so that the gas pressure can be accurately controlled.

[0024] In an optional embodiment, the sealing ring test device further comprises an oil mark and an oil valve. The oil mark is installed in the test shell and is used to obtain the oil level of the test shell. The oil valve is used to adjust the amount of oil in the test shell.

[0025] Based on the above scheme, the test device can simulate the working condition of poor lubricating oil cleanliness, for example, by injecting lubricating oil containing impurities such as particles after running-in. Moreover, the oil level can be obtained in real time through the oil mark, so that the oil amount can be adjusted.

[0026] The beneficial effects of the embodiments of the utility model include, for example:

[0027] In summary, the sealing ring test device provided by the embodiment can simultaneously install sealing units between the first test shaft and the test shell and between the second test shaft and the test shell, and the combination types of the sealing units can be different, for example, the number of skeleton oil seals of the sealing units at the two positions can be different, and the arrangement modes can be different, so that sealing units suitable for different occasions can be tested in the same test session, the number of test equipment is reduced, the number of test times is saved, and the test cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Fig. 1 It is a schematic view of the sealing ring test device of the embodiment of the present application.

[0030] Fig. 2 It is an exploded schematic view of the sealing ring test device of the embodiment of the present application.

[0031] Fig. 3 It is a sectional view of the sealing ring test device of the embodiment of the present application.

[0032] Icon:

[0033] 001-First sealing unit; 002-Second sealing unit; 003-Sealing medium; 100-Drive motor; 200-Test shell; 210-First half shell; 220-Connecting ring; 230-Second half shell; 240-Transparent cover; 300-First test shaft; 400-Second test shaft; 500-Connecting shaft; 510-Diameter increasing ring; 600-First bearing; 700-Second bearing; 800-Check ring; 900-Adjusting part; 920-Heating mechanism; 930-Temperature sensor; 940-Air valve; 950-Pressure gauge; 960-Oil mark; 970-Oil valve; 980-Support. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application, and obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0036] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as limiting the application.

[0038] In addition, if the terms "first", "second" and the like are used only to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] It should be noted that the features in the embodiments of the application can be combined with each other without conflict.

[0040] In the prior art, in order to test the reliability of the sealing ring in different occasions, a corresponding gear box needs to be set up for the occasion, and the sealing ring is directly installed at the corresponding position of the gear box for testing. As a result, since there are many occasions for the use of the sealing ring, multiple test equipment needs to be configured, and each test equipment can only test a single occasion. Different occasions of the sealing ring need to be tested respectively, the number of tests is increased, and finally the test cost is high.

[0041] In view of this, the designer provides a sealing ring test device which can test the sealing rings used in different occasions at the same time, reduces the number of test equipment, saves the number of tests, and reduces the test cost.

[0042] Please refer to Figs. 1-3The sealing ring test device provided by the embodiment comprises a driving motor 100, a test shell 200, a first test shaft 300, a second test shaft 400 and a connecting shaft 500. The driving motor 100 is installed on the test shell 200, and the output shaft of the driving motor 100 is connected with the first test shaft 300. The first test shaft 300 and the second test shaft 400 are rotatably matched with the test shell 200, and the connecting shaft 500 is connected with the first test shaft 300 and the second test shaft 400 to transmit torque. The sealing unit is installed between the first test shaft 300 and the test shell 200, or / and the sealing unit is installed between the second test shaft 400 and the test shell 200.

[0043] As described above, the working principle of the sealing ring test device provided by the embodiment is as follows:

[0044] Taking two sealing units as an example, and for the convenience of description, the two sealing units are a first sealing unit 001 and a second sealing unit 002, and the structure type and arrangement mode of the two sealing units can be set to be the same or different. For example, in the embodiment, each sealing unit comprises two sealing rings arranged side by side. The first sealing unit 001 is installed between the first test shaft 300 and the test shell 200, and the second sealing unit 002 is installed between the second test shaft 400 and the test shell 200. An appropriate amount of sealing medium 003 such as lubricating oil is injected into the test shell 200. The driving motor 100 is started to drive the first test shaft 300 to move, thereby driving the second test shaft 400 to move through the connecting shaft 500. In this way, the reliability of the first sealing unit 001 and the second sealing unit 002 can be tested at the same time in the same test, the number of test equipment is reduced, the test frequency is reduced, and the test cost is reduced.

[0045] It should be noted that the sealing medium 003 injected into the test shell 200 can also be grease and the like, or in some simulation scenarios, the sealing medium 003 can also be a gas and the like.

[0046] The following embodiments illustrate the sealing ring test device of the present application in an exemplary manner.

[0047] Please refer to Figs. 1-3 In the embodiment, optionally, the sealing ring test device comprises the driving motor 100, the test shell 200, the first test shaft 300, the second test shaft 400, the connecting shaft 500, a first bearing 600, a second bearing 700, a retaining ring 800, an adjusting member 900, a heating mechanism 920, a temperature sensor 930, an air valve 940, a pressure gauge 950, an oil mark 960, an oil valve 970 and a bracket 980.

[0048] The driving motor 100 is installed on the test shell 200, the output shaft of the driving motor 100 is connected with the first test shaft 300, the first test shaft 300 is rotatably connected with the test shell 200 through the first bearing 600, the second test shaft 400 is rotatably connected with the test shell 200 through the second bearing 700, the number of the retaining rings 800 is multiple, the first bearing 600 and the second bearing 700 are axially constrained through the corresponding retaining rings 800. The first test shaft 300 and the second test shaft 400 are connected through the connecting shaft 500. The adjusting part 900 is connected with the connecting shaft 500, used for adjusting the balance state of the connecting shaft 500. The heating mechanism 920, the temperature sensor 930, the gas valve 940, the pressure gauge 950, the oil mark 960 and the oil valve 970 are all installed on the test shell 200, the heating mechanism 920 is used for heating the lubricating oil liquid in the test shell 200, so as to adjust the temperature of the lubricating oil liquid. The temperature sensor 930 is used for acquiring the temperature of the lubricating oil liquid, so as to accurately simulate different temperature environments and test the reliability of the sealing ring under different temperature environments. The gas valve 940 is used for connecting with the gas source to adjust the air pressure in the test shell 200, the pressure gauge 950 is used for acquiring the internal air pressure of the test shell 200, so as to accurately simulate different air pressure environments and test the reliability of the sealing ring under different air pressure environments. The oil mark 960 is used for acquiring the oil level of the test shell 200; the oil valve 970 is used for adjusting the amount of oil liquid in the test shell 200, so as to simulate the working condition of poor lubricating oil cleanliness. The support 980 is installed on the test shell 200, the support 980 plays a role in supporting the whole test device, the position of the test device is adjusted by moving the support 980, and the test device can be moved to a set temperature environment, for example, the test device can be moved to a laboratory with a temperature of-40℃ to +40℃, so as to ensure the reliable operation of each part of the test device.

[0049] Optionally, the model of the driving motor 100 is selected as required, and can be adaptively configured according to test requirements, such as a servo motor or a three-phase asynchronous motor, to realize wide-range speed regulation and frequent commutation. In addition, the outer periphery of the output shaft of the driving motor 100 can be provided with a first connecting part, and the first connecting part can be an external spline.

[0050] Please refer to Figs. 1-2Optionally, the test shell 200 can be provided in a split structure, for example, the test shell 200 includes a first half shell 210, a connecting ring 220 and a second half shell 230. The first half shell 210 is connected with the second half shell 230 through the connecting ring 220, and the first half shell 210, the connecting ring 220 and the second half shell 230 can be fixedly connected through bolts or screws, etc. The connection mode is simple and reliable, and is convenient for disassembly and assembly. One side of the first half shell 210 is provided with a first assembly hole, the first bearing 600 is installed in the first assembly hole, one end of the first test shaft 300 is arranged in the first assembly hole and the inner ring of the first bearing 600, and the first sealing unit 001 is located on the side of the first bearing 600 away from the second half shell 230. Correspondingly, one side of the second half shell 230 is provided with a second assembly hole, the second bearing 700 is installed in the second assembly hole, one end of the second test shaft 400 is arranged in the second assembly hole and the inner ring of the second bearing 700, and the second sealing unit 002 is located on the side of the second bearing 700 away from the first half shell 210. The shell of the driving motor 100 can be connected with the first half shell 210 through bolts and other fasteners, and the driving motor 100 is located on the side of the first half shell 210 away from the second half shell 230.

[0051] During assembly, the temperature sensor 930, the pressure gauge 950 and the oil mark 960, etc. can be installed on the first half shell 210, and the heating mechanism 920, the gas valve 940 and the oil valve 970, etc. can be installed on the second half shell 230.

[0052] It should be understood that by providing the test shell 200 in a split structure, the first half shell 210, the connecting ring 220 and the second half shell 230 are independently machined, with high machining precision, low machining difficulty and high machining efficiency, and the difficulty of assembling the first test shaft 300 and the second test shaft 400 on the test shell 200 can also be reduced. Moreover, when a fault occurs, only part of the components can be replaced by disassembling the bolts and other fasteners, thereby reducing the maintenance cost.

[0053] Please refer to Figs. 1-3In addition, the test shell 200 further comprises a transparent cover 240 which can be mounted on the second half shell 230 by means of fasteners such as bolts, and the transparent cover 240 is located on the side of the second half shell 230 away from the first half shell 210, and has a spacing from the end of the second test shaft 400 away from the first test shaft 300. During the test, the running condition of the second test shaft 400 can be observed through the transparent cover 240, so as to observe the running condition of the sealing unit located on the second test shaft 400, which is beneficial to obtain relevant data. Moreover, the design of the transparent cover 240 can also shield the sealing unit, so that it is not polluted by external impurities, and the performance parameters of the sealing ring obtained by testing are more accurate. Since the transparent cover 240 has a spacing from the end of the second test shaft 400, the second test shaft 400 is not easy to collide with the transparent cover 240 when it jumps axially during rotation, thereby reducing the failure rate and reducing noise.

[0054] Optionally, one end of the first test shaft 300 is provided with a second connecting portion, which can be provided as an internal spline matched with an external spline on the output shaft. During assembly, the output shaft is inserted into one end of the first test shaft 300, which is convenient and reliable. Obviously, in other embodiments, the first connecting portion can also be an internal spline, and correspondingly, the second connecting portion can be provided as an external spline matched with the internal spline.

[0055] Further, the other end of the first test shaft 300 is provided with a spline hole.

[0056] It should be understood that the structure of the second test shaft 400 can be the same as that of the first test shaft 300, so that the first test shaft 300 and the second test shaft 400 can be interchanged for easy installation.

[0057] Optionally, the connecting shaft 500 can be provided as a spline shaft, and the two ends of the connecting shaft 500 can be respectively inserted into the spline hole of the first test shaft 300 and the spline hole of the second test shaft 400, which is convenient to disassemble and assemble, and the torque transmission is stable and reliable.

[0058] At the same time, the outer circumferential surface of the connecting shaft 500 is provided with threaded holes, and the number of threaded holes can be multiple. The multiple threaded holes are distributed on the outer circumferential surface of the connecting shaft 500. According to the needs, at least one threaded hole can be selected to screw the adjusting member 900, that is, the number and position of the adjusting member 900 are designed as needed, so as to realize the adjustment of the non-dynamic balance state of the connecting shaft 500, and the reliability of the sealing ring under the extreme tolerance working condition can be simulated. Since the adjusting member 900 is screwed with the threaded hole, the adjusting member 900 is convenient to install, and the threaded connection structure has a self-locking function, so that the adjusting member 900 is not easy to fall off from the connecting shaft 500 when it rotates with the connecting shaft 500, and the operation is stable and reliable.

[0059] In addition, the outer circumferential surface of the connecting shaft 500 is provided with a diameter increasing ring 510, the diameter of the diameter increasing ring 510 is greater than the diameter of the shaft section of the connecting shaft 500 which is inserted into the spline hole, and the threaded hole is arranged on the outer circumferential surface of the diameter increasing ring 510, so that the adjusting part 900 is installed on the connecting shaft 500 and is not easy to interfere with the first test shaft 300 and the second test shaft 400, and the adjusting part 900 is convenient to disassemble and assemble.

[0060] The sealing ring test device provided by the embodiment can simulate the working conditions of lip-shaped sealing rings on rotating shafts of various gearboxes, in particular high-speed end oil seals, and verify the sealing effect of the sealing rings through a prime mover.

[0061] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A seal ring testing device for use in cooperation with at least one sealing unit, characterized in that The sealing ring test device comprises a driving motor (100), a test shell (200), a first test shaft (300), a second test shaft (400) and a connecting shaft (500), wherein: The driving motor (100) is mounted on the test shell (200), and an output shaft of the driving motor (100) is connected with the first test shaft (300); the first test shaft (300) and the second test shaft (400) are rotatably connected with the test shell (200), and the connecting shaft (500) is connected with the first test shaft (300) and the second test shaft (400) to transmit torque. The sealing unit is mounted between the first test shaft (300) and the test shell (200), or / and the sealing unit is mounted between the second test shaft (400) and the test shell (200).

2. The sealing ring test device according to claim 1, wherein: An output shaft of the driving motor (100) is provided with a first connecting part, the first test shaft (300) is provided with a second connecting part, one of the first connecting part and the second connecting part is provided as an external spline, and the other is provided as an internal spline capable of engaging with the external spline.

3. The sealing ring test device according to claim 1, wherein: The connecting shaft (500) is provided as a spline shaft.

4. The sealing ring test device according to claim 1, further comprising an adjusting member (900), wherein the adjusting member (900) is mounted on the connecting shaft (500), and the adjusting member (900) is used to adjust the balance state of the connecting shaft (500).

5. The sealing ring test device according to claim 4, wherein an outer circumferential surface of the connecting shaft (500) is provided with a threaded hole, and the adjusting member (900) is screw-connected with the threaded hole.

6. The sealing ring test device according to claim 1, wherein the test shell (200) comprises a first half shell (210), a connecting ring (220) and a second half shell (230), the first half shell (210) is connected with the second half shell (230) through the connecting ring (220), the first test shaft (300) is rotatably connected with the first half shell (210), the second test shaft (400) is rotatably connected with the second half shell (230), and the driving motor (100) is mounted on the first half shell (210).

7. The sealing ring test device according to claim 6, wherein the test shell (200) further comprises a transparent cover (240), the transparent cover (240) is mounted on the second half shell (230) and has a spacing from an end of the second test shaft (400) away from the first test shaft (300).

8. The sealing ring test device according to any one of claims 1-6, wherein: ​ ​ ​ ​ The sealing ring testing device further comprises a heating mechanism (920) installed on the testing shell (200), which is used to adjust the temperature of the lubricating oil in the testing shell (200).

9. The sealing ring testing device according to any one of claims 1-6, characterized in that: The sealing ring testing device further comprises an air valve (940) and a pressure gauge (950), both of which are installed on the testing shell (200), the air valve (940) is used to connect with an air source to adjust the air pressure in the testing shell (200), and the pressure gauge (950) is used to obtain the internal air pressure of the testing shell (200).

10. The sealing ring testing device according to any one of claims 1-6, characterized in that: The sealing ring testing device further comprises an oil mark (960) and an oil valve (970), the oil mark (960) is installed on the testing shell (200) to obtain the oil level of the testing shell (200), and the oil valve (970) is used to adjust the amount of oil in the testing shell (200).

Images