Friction and wear performance testing system and method for sealing ring

Abstract

The invention provides a friction and wear performance testing system and method for a sealing ring. The frictional wear performance test system comprises: an accommodating device, which comprises a first accommodating groove for placing a sealing ring sample; the friction device is rotatably arranged relative to the accommodating device and comprises a sample surface opposite to the notch of the first accommodating groove; the driving device is in driving connection with the friction device and is configured to drive the friction device to rotate relative to the accommodating device; the loading device is in driving connection with the accommodating device and is configured to enable the sealing ring sample in the first accommodating groove to be in contact with the surface of the sample through the accommodating device and enable a preset test force to be formed between the sealing ring sample and the sample; the friction force measuring device is configured to obtain friction force information representing friction force between the surface of the sample and the sealing ring sample; and the data processing device is coupled with the friction force measuring device and is configured to receive the friction force information and obtain a friction performance parameter value of the sealing ring sample according to the friction force information.

Description

Technical Field

[0001] The present application relates to a sealing structure testing technology, and in particular to a friction and wear performance testing system and method for a sealing ring. Background Art

[0002] The good friction and wear performance of rubber sealing rings helps to improve the reliability and safety of equipment systems. With the continuous advancement and improvement of the technology of improving the friction and wear performance of rubber sealing rings through surface treatment and other measures, it has become a greater challenge to examine and verify the friction and wear performance of rubber sealing rings through effective means. The friction behavior of rubber is complex, and the factors affecting its friction performance include the microstructure of the rubber itself, the physical and mechanical properties of the rubber, as well as the ambient temperature, the surface roughness of the sample, the load, the rotation speed, the lubricating medium, etc. At present, there are more and more research methods on the friction and wear performance of rubber sealing rings, from friction and wear performance to microstructure and simulation, which provide some basis for the research on friction and wear performance. However, for the test equipment and related methods for studying the friction and wear performance of rubber sealing rings actually used in mechanical equipment, there is currently no reliable and effective test equipment and method to evaluate the friction and wear performance of rubber sealing rings.

[0003] At present, the main technical directions in the testing of friction and wear performance of rubber sealing rings include two aspects: one is the standard friction and wear test equipment developed from experiments, but the existing standard friction and wear test equipment mainly uses rubber sheets as friction objects, and cannot use real rubber sealing rings used in engineering practice; the second is to use bench tests to examine the friction and wear performance of rubber sealing rings. For example, when examining the friction and wear performance of rubber sealing rings used in hydraulic cylinders, hydraulic cylinders are often used for pulse tests or reciprocating motion tests under certain pressure, oil temperature, displacement / stroke, frequency, number of tests, speed and other different parameters. The friction and wear performance, pressure resistance, durability and sealing performance of rubber sealing rings are evaluated through the dimensions of changes in sealing ring quality, surface morphology, and whether the system is leaking oil.

[0004] The standard friction and wear test equipment established in the laboratory cannot accurately simulate the actual working conditions of rubber sealing rings. There is a lack of a test device that can reasonably evaluate the friction and wear performance of rubber sealing rings. There is a difference between the test results obtained and the actual use effects of rubber sealing rings, and the reference and guidance value are not high.

[0005] Bench tests can directly reflect the friction and wear performance and reliability of rubber seals, but the test equipment used in bench tests is often complex, relatively inconvenient to operate, and has a long test cycle. It cannot quickly evaluate the friction and wear performance of rubber seals, and the test cost is high and the economic efficiency is poor. In addition, bench tests are difficult to conduct multiple tests during the development of rubber seal materials, and are generally mainly used for testing and performance evaluation of commercial seals or seals in the later stages of R&D.

[0006] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0007] The purpose of the present application is to provide a sealing ring friction and wear performance testing system and method, aiming to conveniently, quickly and reliably detect the friction and wear performance of sealing ring samples.

[0008] The first aspect of the present application provides a friction and wear performance testing system for a sealing ring, comprising:

[0009] The containing device comprises a first containing groove, wherein the first containing groove is configured to place the sealing ring sample;

[0010] a friction device, rotatably arranged relative to the accommodation device, comprising a sample surface opposite to the notch of the first accommodation groove, wherein the sample surface is configured to rotate relative to the first accommodation groove in a state where the sample surface is in contact with the sealing ring sample in the first accommodation groove and a preset test force exists between the sample surface and the sealing ring sample so as to generate friction force by friction with the sealing ring sample;

[0011] a driving device, drivingly connected to the friction device, and configured to drive the friction device to rotate relative to the receiving device so that the sample surface rotates relative to the first receiving groove;

[0012] A loading device, drivingly connected to the accommodating device, configured to make the sealing ring sample located in the first accommodating groove contact with the sample surface through the accommodating device and to make the preset test force exist between the sample surface and the sealing ring sample;

[0013] a friction force measurement device configured to obtain friction force information representative of the friction force; and

[0014] The data processing device is coupled to the friction force measuring device and is configured to receive the friction force information and obtain the friction performance parameter value of the sealing ring sample according to the friction force information.

[0015] In the friction and wear performance testing system of the sealing ring of some embodiments, the specification of the first containing groove can be changed; and / or the roughness of the surface of the sample can be changed.

[0016] In the friction and wear performance testing system of the sealing ring of some embodiments, the accommodating device further includes a limiting structure, and the limiting structure is configured to limit the sealing ring sample located in the first accommodating groove.

[0017] In the friction and wear performance testing system of the sealing ring in some embodiments, the limiting structure includes:

[0018] a second containing groove, the second containing groove being in communication with and intersecting with the first containing groove; and

[0019] The stop block is configured to cooperate with the second receiving groove to circumferentially limit the sealing ring sample located in the first receiving groove.

[0020] In the friction and wear performance testing system of the sealing ring in some embodiments, the first receiving groove is a circular ring groove, and the second receiving groove extends in the radial direction of the circular ring groove.

[0021] In the friction and wear performance testing system of the sealing ring in some embodiments,

[0022] The accommodating device comprises a first sample disk, and the first accommodating groove is arranged on the first sample disk;

[0023] The friction device comprises a second sample disk, the second sample disk is opposite to the first sample disk, and the sample surface is arranged on the second sample disk and is opposite to the first containing groove.

[0024] In the friction and wear performance testing system of the sealing ring in some embodiments,

[0025] The accommodating device further comprises a first disc seat, the first sample disc is detachably connected to the first disc seat without relative rotation, and the loading device is drivingly connected to the first disc seat; and / or

[0026] The friction device further comprises a second disc seat, the second sample disc is detachably connected to the second disc seat without relative rotation, and the driving device is drivingly connected to the second disc seat.

[0027] In the friction and wear performance testing system of the sealing ring in some embodiments,

[0028] The accommodating device comprises a plurality of the first sample trays, the first accommodating grooves of the plurality of the first sample trays have different specifications, and the first tray seat can be selectively connected to any one of the plurality of the first sample trays in a detachable and non-rotatable manner; and / or

[0029] The friction device comprises a plurality of second sample disks, the sample surfaces of the plurality of second sample disks have different roughnesses, and the second disk seat can be selectively connected to any one of the plurality of second sample disks in a detachable and non-rotatable manner.

[0030] In the friction and wear performance testing system of the sealing ring in some embodiments,

[0031] One of the first sample disk and the first disk seat has a first protrusion, and the other has a first groove that matches the first protrusion, and the first sample disk and the first disk seat are detachably connected without relative rotation through the first protrusion and the first groove; and / or

[0032] The second disc seat is connected to the second sample disc in a detachable and non-rotatable manner by clamping.

[0033] In the friction and wear performance testing system of the sealing ring of some embodiments, the accommodating device further comprises a base, the first disc seat is detachably connected to the base without relative rotation, and the base is drivingly connected to the loading device.

[0034] In some embodiments of the friction and wear performance testing system of the sealing ring, one of the first disc seat and the base has a second protrusion, and the other has a second groove that cooperates with the second protrusion. The first disc seat and the base are detachably connected without relative rotation through the cooperation of the second protrusion and the second groove.

[0035] In the friction and wear performance testing system of the sealing ring in some embodiments, the first disc seat is coaxial with the base and the diameter of the first disc seat is larger than the diameter of the base.

[0036] In the friction and wear performance testing system of the sealing ring in some embodiments, the loading device includes a spring loading device and / or a hydraulic loading device.

[0037] In the friction and wear performance testing system of the sealing ring of some embodiments, the friction and wear performance testing system further comprises a temperature control device, and the temperature control device is configured to monitor the test temperature of the friction and wear performance test of the sealing ring sample.

[0038] In the friction and wear performance testing system of the sealing ring in some embodiments, the temperature control device includes:

[0039] a temperature sensor configured to monitor the test temperature; and

[0040] The temperature regulating device is configured to regulate the test temperature to a preset temperature according to the test temperature monitored by the temperature sensor.

[0041] In the friction and wear performance testing system of the sealing ring of some embodiments, the accommodating device includes a lubricating oil groove, and the first accommodating groove is arranged on the bottom wall of the lubricating oil groove.

[0042] In some embodiments of the sealing ring friction and wear performance testing system, the accommodating device includes a lubricating oil tank, the first accommodating tank is arranged on the bottom wall of the lubricating oil tank, and the temperature control device monitors the test temperature by monitoring the temperature of the lubricating oil in the lubricating oil tank.

[0043] The second aspect of the present application provides a method for testing the friction and wear performance of a sealing ring, comprising using the friction and wear performance testing system for the sealing ring described in the first aspect of the present application to test the friction and wear performance of a sealing ring sample, wherein the friction and wear performance testing method comprises:

[0044] Installing the sealing ring sample into the first containing groove of the containing device;

[0045] The loading device makes the sealing ring sample in the first containing groove contact with the sample surface through the containing device, and makes the preset test force exist between the sample surface and the sealing ring sample;

[0046] The driving device drives the friction device to rotate relative to the accommodating device so that the sample surface rotates relative to the first accommodating groove, and rotates relative to the first accommodating groove to rub against the sealing ring sample to generate friction force;

[0047] The friction force measuring device acquires friction force information representing the friction force; and

[0048] The data processing device receives the friction force information and obtains the friction performance parameter value of the sealing ring sample according to the friction force information.

[0049] In the friction and wear performance testing method of some embodiments, the friction and wear performance testing method further includes:

[0050] Before installing the sealing ring sample into the first containing groove of the containing device and after obtaining the friction performance parameter value of the sealing ring sample, weighing the mass of the sealing ring sample respectively; and

[0051] The friction and wear performance of the sealing ring sample is obtained according to the friction performance parameter value and the mass.

[0052] In the friction and wear performance testing method of some embodiments, the friction and wear performance testing method further comprises monitoring the test temperature of the friction and wear performance test of the sealing ring sample by a temperature control device.

[0053] In some embodiments of the friction and wear performance testing method, the friction and wear performance testing method further includes changing the specifications of the first containing groove and / or changing the roughness of the sample surface.

[0054] Based on the sealing ring friction and wear performance testing system and method provided in the present application, it is possible to use sealing ring samples that represent the sealing rings actually used in mechanical equipment, typically such as rubber sealing rings, to carry out friction and wear performance testing of the sealing ring samples and the sealing rings they represent, so as to conveniently and quickly achieve accurate evaluation of the friction and wear performance of rubber sealing rings under simulated actual working conditions, and provide reliable data support for the design, manufacture and application of sealing rings.

[0055] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0057] Figure 1 Schematic diagram of the structure of the friction and wear performance testing system of the sealing ring in some embodiments of the present application.

[0058] Figure 2 for Figure 1 A schematic structural diagram of one direction of a first sample disk of a containing device of a friction and wear performance testing system for a sealing ring in the illustrated embodiment.

[0059] Figure 3 for Figure 2 A schematic structural diagram of the first sample disk in another direction is shown.

[0060] Figure 4 for Figure 1 A schematic structural diagram of one direction of a first disc seat of a accommodating device of a friction and wear performance testing system for a sealing ring in the illustrated embodiment.

[0061] Figure 5 for Figure 4 A schematic structural diagram of the first disc seat in another direction is shown.

[0062] Figure 6 for Figure 1A schematic structural diagram of a limit block of a receiving device of a friction and wear performance testing system for a sealing ring according to the illustrated embodiment.

[0063] Figure 7 for Figure 1 A schematic structural diagram of a second sample disk of a friction device of a friction and wear performance testing system for a sealing ring according to the illustrated embodiment.

[0064] Figure 8 for Figure 1 A block diagram of the connection relationship between a friction force measuring device and a data processing device of a friction and wear performance testing system for a sealing ring in the illustrated embodiment.

[0065] Fig. 9 for Figure 1 A block diagram of the connection relationship between the temperature sensor and the temperature regulating device of the temperature control device of the friction and wear performance testing system of the sealing ring in the illustrated embodiment.

[0066] Fig.10 The friction coefficient changes of two samples of Example 1 of this application are tested.

[0067] Fig.11 The friction coefficient of two samples of Example 2 of the present application was tested between 0 and 3000 revolutions.

[0068] Fig.12 The friction coefficient of two samples of Example 2 of the present application was tested at 3000 to 6000 revolutions.

[0069] Fig.13 The friction coefficient of two samples of Example 2 of the present application was tested at 6000 to 9000 revolutions. DETAILED DESCRIPTION

[0070] 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, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. 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.

[0071] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0072] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0073] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0074] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0075] In view of the deficiencies of the related art described in the background technology, a friction and wear performance testing system and method for a sealing ring are provided.

[0076] like Figures 1 to 8 As shown, the friction and wear performance testing system of the sealing ring includes a containing device, a friction device, a driving device 15 , a loading device 16 , a friction force measuring device 17 and a data processing device 18 .

[0077] The containing device comprises a first containing groove 81. The first containing groove 81 is configured to place the sealing ring sample 7.

[0078] The friction device is rotatably arranged relative to the accommodating device. The friction device includes a sample surface opposite to the notch of the first accommodating groove 81. The sample surface is configured to rotate relative to the first accommodating groove 81 in a state where the sample surface is in contact with the sealing ring sample 7 in the first accommodating groove 81 and a preset test force exists between the sample surface and the sealing ring sample 7 so as to generate friction force by friction with the sealing ring sample 7.

[0079] The driving device 15 is drivingly connected to the friction device, and is configured to drive the friction device to rotate relative to the receiving device so that the sample surface rotates relative to the first receiving groove 81 .

[0080] The loading device 16 is drivingly connected to the accommodating device, and is configured to make the sealing ring sample 7 located in the first accommodating groove 81 contact with the sample surface through the accommodating device and to make a preset test force exist between the sample surface and the sealing ring sample 7 .

[0081] The friction force measuring device 17 is configured to obtain friction force information representing the friction force. The friction force measuring device 17 includes, for example, a friction force sensor.

[0082] The data processing device 18 is coupled to the friction force measuring device 17 and is configured to receive the friction force information and obtain the friction performance parameter value of the sealing ring sample 7 according to the friction force information.

[0083] The data processing device 18 can be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof, for performing the functions described in the present application.

[0084] The friction and wear performance testing system for the sealing ring in the embodiment of the present application can use the sealing ring sample 7 representing the rubber sealing ring actually used in mechanical equipment to carry out friction and wear performance testing of the sealing ring sample 7 and the rubber sealing ring it represents, so as to conveniently and quickly realize accurate evaluation of the friction and wear performance of the sealing ring under simulated actual working conditions, and provide reliable data support for the design, manufacture and application of the sealing ring.

[0085] In the friction and wear performance testing system of the sealing ring in some embodiments, the specification of the first receiving groove 81 can be changed; and / or the roughness of the surface of the sample can be changed.

[0086] The specification of the first receiving groove 81 can be changed, which means that the shape and / or size of the first receiving groove 81 can be changed, such as the overall size can be changed, the cross-sectional shape can be changed, the cross-sectional size can be changed, etc. For example, the first receiving groove is generally a circular ring groove. In this case, the overall size can be changed, which means that the inner diameter and outer diameter of the ring groove of the first receiving groove can be changed. The cross-sectional shape can be changed, for example, between square, triangular, semicircular, elliptical, U-shaped or trapezoidal cross-sectional shapes. The cross-sectional size can be changed, which means that the cross-sectional size can be changed when the cross-sectional shape remains unchanged, for example, for a semicircular cross-section, the diameter of the semicircle can be changed, and for another example, for a square cross-section, the cross-sectional depth, cross-sectional width, etc. can be changed. The specification of the first accommodating groove 81 can be changed, so that the specification of the first accommodating groove 81 can be adjusted according to the form and size of the tested sealing ring sample 7 so that the two have a higher degree of matching, thereby facilitating a more accurate result in the friction and wear performance test. The sealing ring sample 7 representing rubber sealing rings of different types and different cross-sectional sizes actually used in mechanical equipment can be used to carry out friction and wear performance tests of the sealing ring sample 7 and the rubber sealing rings it represents, so that the friction and wear performance of various rubber sealing rings under simulated actual working conditions can be accurately evaluated quickly and conveniently, with wide coverage and strong versatility.

[0087] The roughness of the sample surface can be changed to facilitate changing the friction and wear performance test conditions, so as to obtain suitable test conditions matching the tested sealing ring sample 7, which is conducive to obtaining the required results of the friction and wear performance test.

[0088] like Figures 1 to 7 As shown, in some embodiments of the sealing ring friction and wear performance testing system, the accommodating device further includes a limiting structure, and the limiting structure is configured to limit the sealing ring sample 7 located in the first accommodating groove 81.

[0089] The sealing ring sample 7 is limited by the limiting structure, which is conducive to obtaining more accurate results in the friction and wear performance test.

[0090] like Figures 1 to 7 As shown, in the friction and wear performance test system of the sealing ring of some embodiments, the limiting structure includes a second accommodating groove 82 and a stopper 9. The second accommodating groove 82 is connected to and intersects with the first accommodating groove 81. The stopper 9 is configured to cooperate with the second accommodating groove 82 to circumferentially limit the sealing ring sample 7 located in the first accommodating groove 81. For example, the first accommodating groove 81 is a circular groove, and the second accommodating groove 82 can extend in the radial direction of the circular groove.

[0091] The limiting structure includes a second accommodating groove 82 and a stop block 9. The limiting structure is simple, the operation is convenient and quick, and the limiting is reliable.

[0092] like Figures 1 to 7As shown, in some embodiments of the friction and wear performance testing system of the sealing ring, the accommodating device includes a first sample disk 8, and the first accommodating groove 81 is arranged on the first sample disk 8; the friction device includes a second sample disk 12, the second sample disk 12 is opposite to the first sample disk 18, and the sample surface is arranged on the second sample disk 12 and opposite to the first accommodating groove 81.

[0093] The accommodating device includes a first sample disk 8 having a first accommodating groove 81, which facilitates the loading device 16 to load a preset test force on the sealing ring sample 7 in the first accommodating groove 81 through the first sample disk 8. The friction device includes a second sample disk 12 having a sample surface, which facilitates the driving device 15 to drive the sample surface to rotate relative to the first accommodating groove 81 by driving the second sample disk 12.

[0094] like Figures 1 to 7 As shown, in some embodiments of the friction and wear performance testing system of the sealing ring, the accommodating device also includes a first disc base 10, the first sample disc 8 is detachably and non-rotatably connected to the first disc base 10, and the loading device 16 is drivingly connected to the first disc base 10; and / or the friction device also includes a second disc base 13, the second sample disc 12 is detachably and non-rotatably connected to the second disc base 13, and the driving device 15 is drivingly connected to the second disc base 13.

[0095] By providing the first disc seat 10, the loading device 16 can drive the first sample disc 8 through the first disc seat 10 to load the sealing ring sample 7 in the first receiving groove 81 with a preset test force, and it is convenient to maintain the receiving device. By providing the second disc seat 13, the driving device 15 can drive the second sample disc 12 through the second disc seat 13 to rotate the sample surface relative to the first receiving groove 81, and it is convenient to maintain the friction device.

[0096] In some embodiments of the friction and wear performance testing system of the sealing ring, the accommodating device includes a plurality of first sample disks 8, the specifications of the first accommodating grooves 81 of the plurality of first sample disks 8 are different, and the first disk seat 10 can be selectively connected to any one of the plurality of first sample disks 8 in a detachable and non-rotatable manner; and / or the friction device includes a plurality of second sample disks 12, the roughness of the sample surfaces of the plurality of second sample disks 12 is different, and the second disk seat 13 can be selectively connected to any one of the plurality of second sample disks 12 in a detachable and non-rotatable manner.

[0097] By providing a plurality of first sample trays 8 with first accommodating grooves 81 of different specifications, the specifications of the first accommodating grooves 81 can be changed by replacing the first sample trays 8. By providing a plurality of second sample trays 12 with sample surfaces of different roughness, the roughness of the sample surface can be changed by replacing the second sample trays 12.

[0098] It should be noted that the specification of the first receiving groove 81 can be changed by other means, for example, by adding or reducing additional rings. The roughness of the sample surface can also be changed by other means, for example, by changing the sandpaper.

[0099] like Figures 1 to 7 As shown, in some embodiments of the friction and wear performance testing system of the sealing ring, one of the first sample disk 8 and the first disk base 10 has a first protrusion, and the other has a first groove that cooperates with the first protrusion, and the first sample disk 8 and the first disk base 10 are detachably connected without relative rotation through the cooperation of the first protrusion and the first groove; and / or the second disk base 13 is detachably connected with the second sample disk 12 without relative rotation by clamping.

[0100] The first sample tray 8 and the first tray seat 10 are connected detachably and non-rotatably by the cooperation of the first protrusion and the first groove, which is conducive to the rapid disassembly and assembly of the first sample tray 8 and the first tray seat 10. The second tray seat 13 is connected detachably and non-rotatably to the second sample tray 12 by clamping, which is conducive to the rapid disassembly and assembly of the second tray seat 13 and the second sample tray 12, and the connection is safe and stable.

[0101] like Figure 1 As shown, in some embodiments of the sealing ring friction and wear performance testing system, the accommodating device also includes a base 11, the first disc base 10 is detachably and non-rotatably connected to the base 11, and the base 11 is drivingly connected to the loading device 16.

[0102] The first tray base 10 is detachably connected to the base 11 without relative rotation, which is convenient for separating the first tray base 10 from the base 11, and for maintaining the receiving device and operating the first tray base 10 and the first sample tray 8 thereon. For example, the first tray base 10 and the first sample tray 8 can be separated by disassembling the first tray base 10 and turning it upside down.

[0103] like Figure 1 As shown, in some embodiments of the friction and wear performance testing system of the sealing ring, one of the first disc seat 10 and the base 11 has a second protrusion, and the other has a second groove that cooperates with the second protrusion. The first disc seat 10 and the base 11 are detachably connected without relative rotation through the cooperation of the second protrusion and the second groove.

[0104] The first disc seat 10 and the base 11 are connected detachably and without relative rotation through the cooperation of the second protrusion and the second groove, which is conducive to the rapid disassembly and assembly of the first disc seat 10 and the base 11.

[0105] In the friction and wear performance testing system of the sealing ring in some embodiments, the first disc base 10 is coaxial with the base 11 and the diameter of the first disc base 10 is greater than the diameter of the base 11 .

[0106] The diameter of the first disc base 10 is larger than that of the base 11 , which facilitates the first disc base 10 to be quickly separated from the base 11 by operation.

[0107] In the friction and wear performance test system of the sealing ring of some embodiments, the loading device 16 includes a spring loading device and / or a hydraulic loading device. The sealing ring specimen 7 in the first receiving groove 81 can be loaded with a preset test force by the spring loading device and / or the hydraulic loading device. The spring loading device, for example, includes a spring and a screw nut assembly for controlling the extension and contraction of the spring. The hydraulic loading device, for example, includes a hydraulic cylinder.

[0108] like Fig. 9 As shown, in the friction and wear performance testing system of the sealing ring in some embodiments, the friction and wear performance testing system further includes a temperature control device 19 , which is configured to monitor the test temperature of the friction and wear performance test of the sealing ring sample 7 .

[0109] The temperature control device 19 can be used to conduct the friction and wear performance test of the sealing ring at a preset temperature, which is conducive to obtaining the friction and wear performance under the required test conditions.

[0110] like Fig. 9 As shown, in the friction and wear performance test system of the sealing ring in some embodiments, the temperature control device 19 includes a temperature sensor 191 and a temperature regulating device 192. The temperature sensor 191 is configured to monitor the test temperature. The temperature regulating device 192 is configured to adjust the test temperature to a preset temperature according to the test temperature monitored by the temperature sensor 191. The temperature regulating device 192 includes, for example, a heater and / or a cooler.

[0111] like Figure 1 As shown, in some embodiments of the friction and wear performance testing system of the sealing ring, the accommodating device includes a lubricating oil tank T, and the first accommodating tank 81 is arranged on the bottom wall of the lubricating oil tank T.

[0112] The provision of the lubricating oil tank T is beneficial for testing the friction and wear performance of the sealing ring sample 7 under lubrication conditions.

[0113] like Figure 1 and Fig. 9 As shown, in some embodiments of the friction and wear performance testing system of the sealing ring, the accommodating device includes a lubricating oil tank T, the first accommodating tank 81 is arranged on the bottom wall of the lubricating oil tank T, and the temperature control device 19 monitors the test temperature by monitoring the temperature of the lubricating oil in the lubricating oil tank T.

[0114] The test temperature is monitored by monitoring the temperature of the lubricating oil in the lubricating oil tank T, so that the test temperature can be easily and quickly controlled stably and the temperature distribution is uniform.

[0115] The second aspect of the present application provides a method for testing the friction and wear performance of a sealing ring, comprising using the friction and wear performance testing system of the sealing ring of the first aspect of the present application to test the friction and wear performance of a sealing ring sample 7, and the friction and wear performance testing method comprises:

[0116] Install the sealing ring sample 7 into the first receiving groove 81 of the receiving device;

[0117] The loading device 16 makes the sealing ring sample 7 in the first containing groove 81 contact with the sample surface through the containing device so that a preset test force exists between the sample surface and the sealing ring sample 7;

[0118] The driving device 15 drives the friction device to rotate relative to the accommodating device so that the sample surface rotates relative to the first accommodating groove 81, and rotates relative to the first accommodating groove 81 to rub against the sealing ring sample 7 to generate friction force;

[0119] The friction force measuring device 17 obtains friction force information representing the friction force; and

[0120] The data processing device 18 receives the friction force information and obtains the friction performance parameter value of the sealing ring sample 7 according to the friction force information.

[0121] The friction and wear performance testing method of the sealing ring of the embodiment of the present application has the same advantages as the friction and wear performance testing system of the sealing ring of the embodiment of the present application.

[0122] In the friction and wear performance testing method of some embodiments, the friction and wear performance testing method further includes:

[0123] Before installing the sealing ring sample 7 into the first receiving groove 81 of the receiving device and after obtaining the friction performance parameter value of the sealing ring sample 7, respectively weigh the mass of the sealing ring sample 7; and

[0124] The friction and wear performance of the sealing ring sample 7 is obtained according to the friction performance parameter value and mass.

[0125] In the friction and wear performance testing method of some embodiments, the friction and wear performance testing method further includes monitoring the test temperature of the friction and wear performance test of the sealing ring sample 7 by a temperature control device 19 .

[0126] In some embodiments of the friction and wear performance testing method, the friction and wear performance testing method further includes changing the specification of the first containing groove 81 and / or changing the roughness of the sample surface.

[0127] The following combination Figures 1 to 13The friction and wear performance testing system and the friction and wear performance testing method of the sealing ring in the embodiments of the present application are described in detail.

[0128] The friction and wear performance testing system of the sealing ring of the embodiment of the present application is mainly used to test the friction and wear performance of the friction pair of the rubber sealing ring in the form of a ring-surface under simulated real friction conditions. Its basic principle is that the sample surface rotates under the action of a driving device, such as a driving motor, and the rubber sealing ring as its dual friction member moves relative to the sample surface under the action of a loading device. Under the set test parameter conditions, the friction and wear performance of different rubber sealing rings is examined and analyzed based on the obtained rubber sealing ring friction coefficient curve and mass wear amount and other index results.

[0129] The friction and wear performance testing system includes a containing device, a friction device, a driving device 15 , a driving device 15 , a loading device 16 , a friction force measuring device 17 , a data processing device 18 and a temperature control device 19 .

[0130] The accommodating device includes a first sample tray 8, a first tray seat 10, a base 11 and a limiting structure, which is used to fix the sealing ring sample 7 to be tested. The first sample tray 8, the first tray seat 10 and the base 11 are installed in sequence from top to bottom. The first accommodating groove 81 is located on the top surface of the first sample tray 8. The accommodating device adopts a rigid structure to ensure stability during the test. The limiting structure includes a second accommodating groove 82 and a stop block 9.

[0131] The loading device 16 adopts a hydraulic loading device, which is installed under the base 11. It is used to change the height of the base 11 through the hydraulic loading device to apply a controllable axial preset test force to the rubber sealing ring. The preset test force can be loaded at a certain rate, and the preset test force can be steplessly adjusted within a certain range.

[0132] The friction device is located above the accommodating device, and includes a second sample disk 12 and a second disk seat 13. The second sample disk 12 is clamped on the second disk seat 13. The sample surface is located below the second sample disk 12, facing the first accommodating groove 81 of the first sample disk 8.

[0133] The driving source of the driving device 15 is an electric motor, and the moving speed of the sample surface of the friction control device can be precisely controlled by controlling the rotation speed of the electric motor.

[0134] The friction force measuring device 17 uses a high-precision friction force sensor, which can obtain friction force information representing the friction force between the sealing ring sample 7 and the sample surface during the test in real time.

[0135] The data processing device 18 adopts a computer control system, receives the friction information from the friction measuring device 17 and performs calculation and analysis on the received friction information to obtain the friction performance parameter value of the sealing ring sample 7.

[0136] The temperature control device 19 includes a heater and a temperature sensor 191, which is used to control the test temperature and monitor the test temperature change to meet the test requirements of the sealing ring sample 7 under different temperature conditions.

[0137] Among them, the first sample disk 8 is as follows Figure 1 and Figure 2 As shown. Its structure is a disk with a certain thickness, with a circle of circular grooves with a rectangular cross-section extending outward in the radial direction for a certain distance from the center of the disk as the first receiving groove 81. The circular groove has a certain width and depth, and is used to place the sealing ring sample 7. A rectangular groove is opened in a direction perpendicular to the circular groove as the second receiving groove 82, which is used to place the stop block 9 to prevent the sealing ring sample from moving in the circumferential direction during the test. Two positioning pin holes 83 are opened on the back of the first sample disk 8 as the first groove, which are used in conjunction with two positioning pins 101 as the first protrusions on the first disk seat 10 for mounting the first sample disk 8 to fix the first sample disk 8.

[0138] In order to meet the testing requirements of sealing rings with different cross-sectional sizes, the width of the circular groove can be designed to be different sizes, and different series of first sample discs 8 are made. Each first sample disc 8 has the same diameter, and the width of the circular groove thereon is different. When testing, it is only necessary to select the first sample disc 8 with a circular groove of corresponding width according to the cross-sectional size and shape of the sealing ring, without replacing the first disc seat 10 for mounting the first sample disc 8.

[0139] In the actual use of equipment, commonly used rubber sealing rings include nitrile rubber, fluororubber, EPDM rubber, polyurethane rubber, etc., and their cross-sectional shapes also vary, such as O-type, Y-type, V-type, U-type, etc. Combined with the sealing principle and actual use in the equipment, the inner diameter of most rubber sealing rings is between 20mm and 500mm, and the cross-sectional height or width is between 2mm and 10mm.

[0140] The first sample disc 8 in the friction and wear performance test system of this embodiment is set to a thickness of about 6mm and an outer diameter of about 80mm according to the actual use of commonly used rubber sealing rings and the needs of friction and wear performance testing. A circle of annular grooves is opened about 10mm to 20mm in the radial direction from the center of the first sample disc 8, which can be 10mm, 15mm, 20mm, etc. The first sample disc 8 includes a variety of series, each of which has the same outer diameter and thickness, and the width of the annular grooves thereon is different, ranging from 2mm to 10mm, which can be 2mm, 3mm, 4mm...10mm, etc. The depth of the groove is about 1.5mm, which can meet the testing requirements of most rubber sealing rings. The rectangular grooves perpendicular to the annular grooves on each first sample disc 8 have a width of about 3mm, a height of about 1.5mm, and a length greater than the width of the annular grooves on the same first sample disc 8, ranging from 10mm to 14mm, which can be 10mm, 11mm...14mm, etc. The length and width of the stop block 9 used are slightly smaller than the size of the rectangular groove on the same first sample disk 8, and the height is about 1.5 mm, which is convenient for taking and placing the stop block 9.

[0141] The first plate seat 10 Figure 4 and Figure 5 As shown, its structure is a cylinder with a certain height, and a cylindrical groove with a certain depth and diameter is opened inside to accommodate the first sample disk 8. The diameter of the cylindrical groove is slightly larger than the outer diameter of the first sample disk 8, which is convenient for taking and placing the first sample disk 8. Two positioning pins 101 are located on the bottom wall of the cylindrical groove. When testing the friction and wear performance, the first sample disk 8 with the positioning pin hole 83 is placed into the first disk seat 10 with the side facing down, and the first sample disk 8 is fixed by aligning the positioning pin 101 on the first disk seat 10. There are two positioning pin holes as the second grooves on the back of the first disk seat 10, which are used to cooperate with the two positioning pins as the second protrusions on the base 11 to fix the first disk seat 10.

[0142] When testing under oil lubrication conditions, after the first pan base 10 is assembled with the first sample pan 8, the cylindrical groove is located in the space above the top surface of the first sample pan 8 to form a lubricating oil tank T for containing lubricating oil. In addition, two threaded holes 102 are opened on the side of the first pan base 10, which are used to install the temperature sensor 191 of the temperature control device 19 and the electric heater as a temperature adjustment device. The temperature sensor 191 can be used to test the temperature of the lubricating oil, which represents the test temperature. The electric heater can control the test temperature by heating the lubricating oil, so that the temperature control device can monitor the test temperature.

[0143] The second sample disk 12 is Figure 7As shown, its main structure is a cylinder with steps formed in the axial direction, and a cylindrical boss is formed on the side facing the first sample disk 8, and the diameter of the cylindrical boss is smaller than the diameter of the first sample disk 8. When the friction and wear performance is tested, it is fixed to the second disk base 13 by a clamp. The second disk base 13 is fixed to the main shaft 14 and rotates with the main shaft 14, and the main shaft 14 is connected to the driving device 15. The surface of the cylindrical boss facing the first disk base 8 has a test surface, and a pair of friction pairs are formed when the sample surface contacts the sealing ring sample, and the friction pairs are ground when the sample surface rotates. The material of the second sample disk 12 is mainly steel, for example, and can also be processed into different materials according to actual needs, and its surface roughness is also processed and adjusted according to actual needs. In this embodiment, the diameter of the boss of the second sample disk 12 is about 65mm, and the diameter of the grinding plane is about 55mm, which can form a grinding pair with most sealing ring samples of different sizes and shapes.

[0144] A specific embodiment of a method for testing the friction and wear performance of a sealing ring using the friction and wear performance testing system of the sealing ring of the embodiment of the present application may include the following steps:

[0145] (1) After cleaning and drying, the sealing ring sample 7 to be tested is weighed and placed in the annular groove as the first receiving groove 81 on the first sample tray 8 adapted to the sealing ring sample 7, and the sealing ring sample 7 is fixed with a stopper 9;

[0146] (2) Then align the pin hole 83 as the first groove on the back of the first sample disk 8 with the fixing pin 101 as the first protrusion on the first disk base 10 and place the first sample disk 8 in the mounting groove of the first disk base 10;

[0147] (3) The second sample disc 12 having a surface roughness that meets the test requirements is fixedly connected to the second disc base 13;

[0148] (4) After the friction pair (seal ring specimen 7 and specimen surface) is assembled, set the test parameters according to the simulated test conditions;

[0149] (5) Start the loading device 16 until the preset test force is reached between the sealing ring sample 7 and the sample surface;

[0150] (6) Starting the driving device 15 to start the test, so that the second sample disk 12 rotates according to the set parameters;

[0151] (7) The friction force measuring device 17 obtains friction force information representing the friction force generated by the sealing ring sample 7 during the test in real time, and transmits the friction force information to the data processing device 18;

[0152] (8) The data processing device 18 calculates and analyzes the received friction information to obtain the friction coefficient of the sealing ring sample 7 and automatically records the friction coefficient versus time curve and other friction performance parameters to obtain the measurement results;

[0153] (9) After the test in the friction and wear performance test system of the sealing ring is completed, the sealing ring sample 7 is taken out and the mass of the sealing ring sample 7 is weighed;

[0154] (10) The friction and wear performance of the rubber sealing ring was evaluated based on the test results and the quality of the sealing ring sample 7 before and after the test.

[0155] When conducting the friction and wear performance test, in step (1), for a sealing ring with a larger cross-sectional width, a first sample disk 8 with a suitable circular groove width can be selected according to the cross-sectional size, and the width and depth of the circular groove can accommodate the sealing ring sample 7 representing the sealing ring, and the sealing ring is cut and sampled according to the length of the circular groove of the first sample disk 8 to form the sealing ring sample 7, which is then placed in the circular groove, and the stop block 9 is placed in the rectangular groove to ensure that the sealing ring sample 7 is separated from the head and tail and fills the entire circular groove.

[0156] In addition, in step (1), the sealing ring sample 7 is weighed after cleaning and drying before being installed in the first receiving groove 81. A solvent-based cleaning agent or a water-based cleaning agent is used to clean the sealing ring to be tested or the sealing ring sample 7 that has been cut and sampled to remove impurities such as stains and oil stains on the surface. It is recommended to use a neutral water-based cleaning agent (pH≈7) or an alkaline water-based cleaning agent (pH>7) among water-based cleaning agents, which is safe, environmentally friendly and low-cost. After cleaning and drying, the sealing ring sample 7 is weighed using a high-precision balance, and the recommended weighing accuracy is 0.1 mg. It can be weighed three times in a row and the average value is taken as the initial mass of the sealing ring sample 7. If it is necessary to carry out an oil lubrication condition test, the sealing ring sample 7 needs to be cleaned and dried first, and then immersed in the lubricating oil for a certain period of time, recommended 16 hours, and the sealing ring sample 7 after oil immersion is weighed three times and the average value is taken as the initial mass of the sealing ring sample 7.

[0157] In step (2), if the first disc base 10 and the base 11 are in a separated state, the first disc base 10 needs to be placed on the base 11, and the fixing pin holes and fixing pins of the two need to be aligned and matched to fix the first disc base 10 and the base 11.

[0158] In step (3), the second sample disk 12 is fixedly connected to the second disk base 13 by a clamp.

[0159] After the assembly is completed according to steps (1), (2) and (3), the friction pair of step (4) is formed. The friction pair is an assembled structure, which is easy to install and reliable. The simulated test conditions of step (4) include oil-free dry friction conditions, normal temperature oil lubrication conditions, high temperature oil lubrication conditions, etc.; the test parameters include test force, test time, test speed, test temperature, etc.

[0160] In step (5), the loading device 16 is an electrically controlled hydraulic loading device, which is used to apply a controllable axial force to the sealing ring sample 7, loading at a certain rate, and the test force can be steplessly adjusted within a certain range (for example, 0N to 3000N).

[0161] In step (6), the driving device 15 is, for example, an AC servo motor, and the rotation speed of the second sample disk 12 can be precisely controlled by controlling its rotation speed (for example, 0 to 2000 r / min).

[0162] In step (7), the friction force measuring device 17 uses a high-precision strain gauge friction sensor, which can measure the friction force of the sealing ring sample 7 during the test in real time.

[0163] In step (8), the friction coefficient is calculated using formula (1) and is imported into the data processing device 18 for automatic calculation.

[0164] (1)

[0166] Where: μ is the friction coefficient; R is the radius of the torque wheel, in mm; r is the radius of the specimen, in mm; F ​​is the measured friction force, in N; P is the applied test force, in N.

[0167] In steps (7) and (8), the data processing device 18 adopts a computer control system, such as a touch screen integrated computer integrated control. The measurement and control software can realize any programmable test graph of test parameters such as load, speed, time, etc., display each parameter data in real time, program the test process, and calculate and analyze the friction information received from the friction force measuring device 17 to obtain the friction performance parameter value of the sealing ring sample 7, and save the test data in text format or table format.

[0168] In step (9), the mass of the sealing ring sample after the test is weighed, preferably using the same balance as before the test. The sample can be weighed three times in a row and the average value is taken as the mass after the test. The mass wear before and after the test is the difference between the initial mass and the mass after the test.

[0169] In step (10), the test results include two aspects: one is the curve of the change of the friction coefficient of the sealing ring sample 7 over time, and the other is the mass wear of the sealing ring sample.

[0170] The friction and wear performance testing method of the embodiment of the present application can effectively monitor the friction coefficient and time curve of the sealing ring sample 7 in different test stages or different test processes, as well as the mass wear amount before and after the test, and effectively evaluate the friction and wear performance of the sealing ring represented by the sealing ring sample 7.

[0171] The friction and wear performance testing device and method provided in the embodiments of the present application can accurately evaluate the friction and wear performance of sealing rings, such as rubber sealing rings, under actual working conditions, and provide reliable data support for the design, manufacture and application of sealing rings.

[0172] In order to further illustrate the technical solutions and effects adopted by the present application to achieve the intended invention purpose, the following, in combination with the embodiments and drawings, provides a more detailed description of the specific implementation cases and effects of the sealing ring friction and wear performance testing system and method provided by the present application.

[0173] The embodiments of the present application include a process of testing the friction and wear performance of a rubber sealing ring using a sealing ring friction and wear performance testing system and method, and a process of analyzing evaluation indicators such as friction coefficient and mass wear amount during the test.

[0174] During the test of the friction and wear performance of the sealing ring, the sealing ring sample 7 to be tested is first weighed and fixed on the containing device, and then the test parameters are set, including the test force, test time, test speed, test temperature, etc. The loading device 16 is started to apply a load to the sealing ring sample 7. The driving device 15 is started to rotate the second sample disk 12 according to the set parameters. The friction force measuring device 17 measures the friction force of the sealing ring sample 7 during the test in real time, and transmits the data to the data processing device 18. The data processing device 18 analyzes and processes the received data, calculates and analyzes the measured data through a preset algorithm, and obtains friction performance parameters such as the friction force or friction coefficient of the sealing ring changing with time curve. Finally, the mass of the sealing ring sample 7 after the test is weighed to obtain the mass wear before and after the test. According to the analysis and processing results, the friction and wear performance of the sealing ring is evaluated.

[0175] During the implementation of the present application, the friction pair is first installed. According to the type and cross-sectional size of the sealing ring sample 7, a first sample disk 8 is selected, which has a circular groove as the first receiving groove 81 and a rectangular groove as the second receiving groove 82 of appropriate width and depth. After the sealing ring sample 7 to be tested is cleaned, dried and weighed, it is placed in the first receiving groove 81, and a stopper 9 is placed in the second receiving groove 82 perpendicular to the first receiving groove 81, so that the seal ring sample 7 is separated from the head and tail by the stopper 9 to prevent the seal ring sample 7 from moving during the friction and wear performance test. Then, the first sample disk 8 with the locating pin hole 83 as the first groove is placed downward in the first disk seat 10, and the two locating pin holes 83 are aligned with the locating pin 84 as the first protrusion on the first disk seat 10 and then installed and fixed. The two locating pin holes 103 as the second groove on the back of the first disk seat 10 are aligned with the fixing pin as the second protrusion on the base 11 and then installed and fixed. Then, the second sample disc 12 is fixed to the second disc holder 13 by a clamp, and then fixed to the main shaft 14, and the friction pair is installed. Then, the test parameters are set, including the test force, test time, test speed, test temperature, etc. The loading device 16 is started to apply a load to the sealing ring sample 7 to reach the preset test force. The driving device 15 is started to make the second sample disc 12 rotate according to the set parameters.

[0176] If it is necessary to conduct a test with lubricating oil and monitor the oil temperature change, the sealing ring sample 7 needs to be cleaned and dried first, and then immersed in the lubricating oil for a certain period of time, 16 hours is recommended, and the sealing ring sample 7 after oil immersion is weighed three times to take the average value as the initial mass. After the sealing ring sample 7 is installed, the electric heater and the temperature sensor 191 as the temperature adjustment device 192 are respectively installed in the two threaded holes 102 on the side of the first disc seat 10, and lubricating oil is added to the lubricating oil tank T, and then the test is carried out according to the test steps.

[0177] The specific implementation of the present application is described in detail below with reference to two test examples. The test examples are only used to illustrate the technical solution of the present application and are not intended to limit the present application.

[0178] Test Example 1

[0179] Test Example 1 is to use the friction and wear performance testing system and method of the embodiment of the present application to simply and quickly test and compare the friction and wear performance of polyurethane Y-type sealing rings with the same shape and / or changeable size but from different manufacturers.

[0180] 1) Test conditions

[0181] Pressure: 30N; Temperature: room temperature (25±5℃); Speed: 20r / min; Time: 1h; Diameter of sealing ring: 50mm; Section width of sealing ring: 4.6mm; Lubricating medium: HM46 hydraulic oil; Roughness of grinding pair (roughness of sample surface): Ra1.0.

[0182] 2) Test steps

[0183] (1) Select a first sample disk 8 with a circular groove width of 5 mm, and cut a sealing ring sample representing a polyurethane Y-type sealing ring as sample 1 into test samples according to the actual working circumferential length of the circular groove;

[0184] (2) After cleaning the test sample 1 with an alkaline water-based detergent, dry it in an oven for 30 minutes, and then immerse it in oil for 16 hours. The oil-immersed sample is weighed three times using an electronic balance with an accuracy of 0.1 mg, and the average value is taken as the initial mass;

[0185] (3) Place the sample 1 into the annular groove on the first sample pan 8 and fix the sample 1 with the stopper 9, then place the first sample pan 8 into the first pan seat 10 and fix it;

[0186] (4) Align the fixing pin hole 103 at the bottom of the first pan base 10 with the fixing pin on the base 11 and place it stably, and add lubricating oil into the first pan base 10 until the liquid level exceeds the height of the sample 1;

[0187] (5) Fix the second sample disk 12 to the second disk base 13 and the spindle 14 using a clamp;

[0188] (6) Set measurement parameters according to test conditions;

[0189] (7) Start the loading device 16 until the preset test force of 30N is reached;

[0190] (8) Starting the driving device 15 to start the test, so that the second sample disk 12 rotates according to the set parameters;

[0191] (9) The friction force measuring device 17 measures the friction force of the sample 1 in real time during the test and transmits the data to the data processing device 18;

[0192] (10) The data processing device 18 analyzes and processes the received data, calculates the friction coefficient of the sample 1, and automatically records the friction performance parameters such as the friction coefficient versus time curve;

[0193] (11) After the test, use the same balance to weigh the sample 1 after the test. Weigh three times in a row and take the average value as the mass after the test;

[0194] (12) Based on the test results, the friction and wear performance of the rubber seal represented by sample 1 was evaluated.

[0195] Similarly, a sealing ring sample representing another polyurethane Y-type sealing ring is used as sample 2, and the friction and wear performance test of sample 2 is carried out according to steps (1) to (12).

[0196] 3) Test results

[0197] 3.1) Mass wear

[0198] The mass and mass wear of the two samples before and after the test are shown in Table 1.

[0199] Table 1 The mass and mass wear of the two samples before and after the test

[0200]

[0201] 3.2) Friction coefficient

[0202] The friction coefficient of the two samples during the test changes as shown in Fig.10 shown.

[0203] 3.3) Conclusion

[0204] From the mass wear and friction coefficient-time curves of Sample 1 and Sample 2, it can be seen that the mass wear of Sample 2 is lower than that of Sample 1, and the friction coefficient of Sample 2 is lower than that of Sample 1 as a whole during the entire test, indicating that the friction and wear performance of Sample 2 is better than that of Sample 1. In addition, the seals represented by Samples 1 and 2 are applied to the hydraulic system of a certain engineering machinery equipment. The average trouble-free operation time of the seal represented by Sample 2 is about 20% longer than that of the seal represented by Sample 1, which verifies that the friction and wear performance of Sample 2 is better than that of Sample 1, while ensuring the high reliability and high operating efficiency of the equipment, and reducing the maintenance and after-sales costs.

[0205] Therefore, by using the friction and wear performance testing system and method provided in the embodiments of the present application, it is possible to conveniently and quickly implement the testing and comparative analysis of the friction and wear performance of sealing rings of different quality levels, and can be used for quality control of the friction and wear performance of sealing rings, providing a basis for the system to rationally select sealing rings.

[0206] Test Example 2

[0207] Test Example 2 is to compare the friction and wear performance of the original fluororubber rectangular sealing ring and the modified fluororubber rectangular sealing ring with diamond-like film sprayed on the surface under oil lubrication conditions using the friction and wear performance testing system and method provided in the embodiment of the present application, so as to verify whether the friction and wear performance of the fluororubber rectangular sealing ring is improved after the diamond-like film is sprayed.

[0208] 1) Test conditions

[0209] Pressure: 50N; Temperature: room temperature (25±5℃); Speed: 50r / min; Time: 3h (9000 revolutions in total); Diameter of sealing ring: 30mm; Section width of sealing ring: 3.4mm; Lubricating medium (lubricating oil): 8# hydraulic transmission oil; Roughness of grinding pair: Ra2.0.

[0210] 2) Test steps

[0211] (1) Select a first sample disk 8 with a circular groove width of 4 mm, and cut the fluororubber rectangular sealing ring original into sealing ring samples to be tested according to the actual working circumferential length of the groove as uncoated samples;

[0212] (2) After cleaning the uncoated sample with a neutral water-based detergent, dry it in an oven for 30 minutes, and then immerse it in oil for 16 hours. Weigh the uncoated sample after oil immersion three times using an electronic balance with an accuracy of 0.1 mg, and take the average value as the initial mass;

[0213] (3) Place the uncoated sample into the annular groove on the first sample pan 8 and fix the uncoated sample with the stopper 9, then place the first sample pan 8 into the first pan seat 10 and fix it;

[0214] (4) Align the fixing pin hole 103 of the first disc seat 10 with the fixing pin on the base 11 and place it stably, and add lubricating oil into the first disc seat 10 until the liquid level exceeds the height of the uncoated sample;

[0215] (5) Fix the second sample disk 12 to the second disk base 13 and the spindle 14 using a clamp;

[0216] (6) Set measurement parameters according to test conditions;

[0217] (7) Starting the loading device 16 to load the uncoated sample until a preset test force of 50 N is reached;

[0218] (8) Starting the driving device 15 to start the test, so that the second sample disk 12 rotates according to the set parameters;

[0219] (9) The friction force measuring device 17 measures the friction force of the uncoated sample in real time during the test and transmits the data to the data processing device 18;

[0220] (10) The data processing device 18 analyzes and processes the received data, calculates the friction coefficient of the uncoated sample, and automatically records the friction performance parameters such as the friction coefficient versus time curve;

[0221] (11) Stop the friction every 3000 revolutions, remove the sample, and weigh it using the same balance. Weigh it three times each time and take the average value as the mass at the corresponding revolution. The test ends after running for 9000 revolutions.

[0222] (12) Evaluate the friction and wear performance of the sealing ring based on the test results.

[0223] Similarly, the fluororubber rectangular sealing ring original with diamond-like carbon film sprayed on the surface is cut into sealing ring samples to be tested according to the actual working circumferential length of the groove as coating samples, and the friction and wear performance of the coating samples is tested according to steps (1) to (12).

[0224] 3) Test results

[0225] 3.1) Mass wear at different speeds

[0226] The mass and mass wear of the two samples at different rotation numbers are shown in Table 2.

[0227] Table 2 The mass and mass wear of the two samples at different rotation speeds

[0228]

[0229] It can be seen from Table 2 that at 3000 revolutions, the total mass wear of the coated sample is only about one-fourteenth of that of the uncoated sample. After 9000 revolutions, the total mass wear of the coated sample is about one-third of that of the uncoated sample, indicating that the coating can improve the friction reduction effect of the seal ring.

[0230] 3.2) Friction coefficient at different speeds

[0231] The friction coefficient of the two samples at different rotation speeds varies as shown in Figure 11 to Figure 13 As shown. Figure 11 to Figure 13 It can be seen that the friction coefficient of the coated sample is lower than that of the uncoated sample throughout the test. As the number of revolutions increases, the difference between the two friction coefficients gradually decreases, but at 9000 revolutions, the friction coefficient of the coated sample is still lower than that of the uncoated sample, indicating that the coated coating still exists at 9000 revolutions and still has the effect of improving the friction performance of the seal ring.

[0232] 3.3) Conclusion

[0233] It can be seen from the mass wear and friction coefficient-time variation curves of the sealing ring samples that during the entire test process, the mass wear and friction coefficient of the coated samples are lower than those of the uncoated samples, indicating that the sprayed diamond-like film can significantly reduce the friction coefficient on the surface of the sealing ring and improve the friction and wear performance of the sealing ring. It also verifies that the friction and wear performance testing system and method provided in the embodiments of the present application can provide guidance for improving the wear resistance of the sealing ring and verifying and applying the sealing ring surface modification technology.

[0234] In the above embodiments, the friction and wear performance testing system and method of the present application are described in detail to test and analyze the friction and wear performance of different types of rubber sealing rings. Through example verification, it is proved that the friction and wear performance testing system and method provided by the present application can accurately and quickly realize the accurate evaluation of the friction and wear performance of the sealing ring in actual working conditions, simplify the operation process, improve the test efficiency, and thus obtain reliable friction performance parameters, providing a convenient method for the on-site quality inspection of the friction and wear performance of the sealing ring, and also providing technical support for the design, manufacture, application and performance improvement of the sealing ring.

[0235] According to the above description, the friction and wear performance testing system and method of the embodiment of the present application have at least one of the following advantages:

[0236] The friction and wear performance testing system is an assembled structure, which is easy to install and is firm and reliable.

[0237] The friction and wear performance test system is easy to operate, has high test repeatability, and saves test time.

[0238] Parameters such as test force, test time, test speed, test temperature, etc. can be adjusted according to the working characteristics of different seals. Different test parameters can be set to have a wide test range and accurately measure and compare the friction and wear performance of seals of different quality levels.

[0239] Different series of first sample discs with a variety of first containing grooves can meet the testing requirements of sealing rings of different types and different cross-sectional sizes, and are widely used in the testing of friction and wear performance of various sealing rings, with wide coverage and strong versatility.

[0240] Through the drive device, friction force measurement device and data acquisition and processing system, high-precision testing and data processing of the friction and wear performance of the sealing ring can be achieved, which simplifies the data analysis process and saves testing time.

[0241] It can precisely control the test conditions, conveniently and quickly realize the accurate evaluation of the friction and wear performance of various types of sealing rings in simulated actual working conditions, simplify the operation process, improve the test efficiency, and thus obtain more accurate and reliable test results. It provides a convenient method for the on-site quality inspection of the friction and wear performance of sealing rings, especially rubber sealing rings, and also provides technical support for the design, manufacture, application and performance improvement of sealing rings, effectively ensuring the safe, efficient and reliable operation of mechanical equipment.

[0242] In summary, the friction and wear performance testing system and method of the sealing ring of the embodiment of the present application is conducive to solving the problem that the standard testing equipment in the prior art cannot accurately simulate the actual working conditions of the rubber sealing ring, and solves the problem that the equipment in the bench test is complex, the test cycle is long, the cost is high, and the friction and wear performance of the rubber sealing ring cannot be quickly evaluated.

[0243] Those skilled in the art will appreciate that, in the above method of a specific embodiment, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

[0244] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0245] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A friction and wear performance testing system for a sealing ring, characterized in that: include: The containing device comprises a first containing groove (81), wherein the first containing groove (81) is configured to place a sealing ring sample (7); a friction device, rotatably arranged relative to the accommodating device, comprising a sample surface opposite to the notch of the first accommodating groove (81), wherein the sample surface is configured to rotate relative to the first accommodating groove (81) in a state where the sample surface is in contact with the sealing ring sample (7) in the first accommodating groove (81) and a preset test force exists between the sample surface and the sealing ring sample (7) so as to rub against the sealing ring sample (7) to generate friction force; A driving device (15) is drivingly connected to the friction device and is configured to drive the friction device to rotate relative to the receiving device so that the sample surface rotates relative to the first receiving groove (81); A loading device (16) is drivingly connected to the accommodating device and is configured to make the sealing ring sample (7) located in the first accommodating groove (81) contact with the sample surface through the accommodating device and to make the preset test force exist between the sample surface and the sealing ring sample (7); a friction force measuring device (17) configured to obtain friction force information representative of the friction force; and A data processing device (18) is coupled to the friction force measuring device (17) and is configured to receive the friction force information and obtain a friction performance parameter value of the sealing ring sample (7) based on the friction force information.

2. The friction and wear performance testing system of the sealing ring according to claim 1, characterized in that: The specifications of the first containing groove (81) can be changed; and / or the roughness of the surface of the sample can be changed.

3. The friction and wear performance testing system of the sealing ring according to claim 1, characterized in that: The accommodating device further comprises a limiting structure, wherein the limiting structure is configured to limit the sealing ring sample (7) located in the first accommodating groove (81).

4. The friction and wear performance testing system of the sealing ring according to claim 3, characterized in that: The limiting structure comprises: a second accommodating groove (82), the second accommodating groove (82) being in communication with and intersecting with the first accommodating groove (81); and The stop block (9) is configured to cooperate with the second receiving groove (82) to circumferentially limit the sealing ring sample (7) located in the first receiving groove (81).

5. The friction and wear performance testing system of the sealing ring according to claim 4, characterized in that: The first accommodating groove (81) is a circular ring-shaped groove, and the second accommodating groove (82) extends in the radial direction of the circular ring-shaped groove.

6. The friction and wear performance testing system of the sealing ring according to claim 1, characterized in that: The accommodating device comprises a first sample tray (8), and the first accommodating groove (81) is arranged on the first sample tray (8); The friction device comprises a second sample disc (12), the second sample disc (12) being opposite to the first sample disc (18), and the sample surface being arranged on the second sample disc (12) and opposite to the first containing groove (81).

7. The friction and wear performance testing system of the sealing ring according to claim 6, characterized in that: The accommodating device further comprises a first disc seat (10), the first sample disc (8) being detachably connected to the first disc seat (10) without relative rotation, and the loading device (16) being drivingly connected to the first disc seat (10); and / or The friction device further comprises a second disc seat (13), the second sample disc (12) being detachably connected to the second disc seat (13) without relative rotation, and the driving device (15) being drivingly connected to the second disc seat (13).

8. The friction and wear performance testing system of the sealing ring according to claim 7, characterized in that: The accommodating device comprises a plurality of first sample discs (8), the first accommodating grooves (81) of the plurality of first sample discs (8) having different specifications, and the first disc seat (10) can be selectively connected to any one of the plurality of first sample discs (8) in a detachable and non-rotatable manner; and / or The friction device comprises a plurality of second sample discs (12), the sample surfaces of the plurality of second sample discs (12) having different roughnesses, and the second disc seat (13) can be selectively connected to any one of the plurality of second sample discs (12) in a detachable and non-rotatable manner.

9. The friction and wear performance testing system of the sealing ring according to claim 8, characterized in that: One of the first sample disc (8) and the first disc seat (10) has a first protrusion, and the other has a first groove that cooperates with the first protrusion, and the first sample disc (8) and the first disc seat (10) are connected detachably and without relative rotation through the cooperation between the first protrusion and the first groove; and / or The second disc seat (13) is connected to the second sample disc (12) in a detachable and non-rotatable manner by clamping.

10. The friction and wear performance testing system of the sealing ring according to claim 8, characterized in that: The accommodating device further comprises a base (11), the first disc base (10) being detachably connected to the base (11) without relative rotation, and the base (11) being drivingly connected to the loading device (16).

11. The friction and wear performance testing system of the sealing ring according to claim 10, characterized in that: One of the first disc seat (10) and the base (11) has a second protrusion, and the other has a second groove that cooperates with the second protrusion. The first disc seat (10) and the base (11) are connected detachably and without relative rotation through the cooperation between the second protrusion and the second groove.

12. The friction and wear performance testing system of the sealing ring according to claim 10, characterized in that: The first disc seat (10) is coaxial with the base (11), and the diameter of the first disc seat (10) is greater than the diameter of the base (11).

13. The friction and wear performance testing system of a sealing ring according to any one of claims 1 to 12, characterized in that: The loading device (16) comprises a spring loading device and / or a hydraulic loading device.

14. The friction and wear performance testing system of a sealing ring according to any one of claims 1 to 12, characterized in that: It also includes a temperature control device (19), which is configured to monitor the test temperature of the friction and wear performance test of the sealing ring sample (7).

15. The friction and wear performance testing system of the sealing ring according to claim 14, characterized in that: The temperature control device (19) comprises: a temperature sensor (191) configured to monitor the test temperature; and The temperature regulating device (192) is configured to regulate the test temperature to a preset temperature according to the test temperature monitored by the temperature sensor (191).

16. The friction and wear performance testing system of a sealing ring according to any one of claims 1 to 12, characterized in that: The accommodating device comprises a lubricating oil groove (T), and the first accommodating groove (81) is arranged on the bottom wall of the lubricating oil groove (T).

17. The friction and wear performance testing system of the sealing ring according to claim 14, characterized in that: The accommodating device comprises a lubricating oil tank (T), the first accommodating tank (81) is arranged on the bottom wall of the lubricating oil tank (T), and the temperature control device (19) monitors the test temperature by monitoring the temperature of the lubricating oil in the lubricating oil tank (T).

18. A method for testing the friction and wear performance of a sealing ring, characterized in that: The method comprises using a friction and wear performance testing system for a sealing ring according to any one of claims 1 to 17 to test the friction and wear performance of a sealing ring sample (7), wherein the friction and wear performance testing method comprises: Installing the sealing ring sample (7) into the first containing groove (81) of the containing device; The loading device (16) causes the sealing ring sample (7) located in the first containing groove (81) to contact the sample surface through the containing device, and causes the preset test force to exist between the sample surface and the sealing ring sample (7); The driving device (15) drives the friction device to rotate relative to the accommodating device so that the sample surface rotates relative to the first accommodating groove (81), and rotates relative to the first accommodating groove (81) to rub against the sealing ring sample (7) to generate friction force; The friction force measuring device (17) obtains friction force information representing the friction force; and The data processing device (18) receives the friction force information and obtains a friction performance parameter value of the sealing ring sample (7) based on the friction force information.

19. The method for testing the friction and wear performance of a sealing ring according to claim 18, characterized in that: Also includes: Before installing the sealing ring sample (7) into the first containing groove (81) of the containing device and after obtaining the friction performance parameter value of the sealing ring sample (7), respectively weighing the mass of the sealing ring sample (7); The friction and wear performance of the sealing ring sample (7) is obtained according to the friction performance parameter value and the mass.

20. The method for testing the friction and wear performance of a sealing ring according to claim 18, characterized in that: It also includes monitoring the test temperature of the friction and wear performance test of the sealing ring sample (7) through a temperature control device (19).

21. The method for testing the friction and wear performance of a sealing ring according to claim 18, characterized in that: It also includes changing the specifications of the first containing groove (81) and / or changing the roughness of the surface of the sample.

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