Floating seal test device

Abstract

The utility model relates to a floating seal test device. The floating seal test device comprises a central shaft, a sealing cover, a driving mechanism, a pressurizing mechanism, an impact mechanism and a detection mechanism. The center shaft is connected with a first end cover. A metal floating sealing ring to be tested can be clamped between the first end cover and the sealing cover, and the first end cover divides a sealing cavity of the sealing cover into a first cavity and a second cavity. The driving mechanism is used for driving the sealing cover to rotate around the axis of the center shaft relative to the first end cover. The pressurizing mechanism is used for pressurizing the first cavity. The impact mechanism is used for impacting the side wall of the sealing cover. The detection mechanism communicates with the first cavity and / or the second cavity and is used for monitoring the pressure of the first cavity and / or the second cavity. The floating sealing test device can simulate the real clamping condition and the real rotation working condition of the metal floating sealing ring, the real pressure environment of high-pressure muddy water and the impact working condition of the metal floating sealing ring in the tunneling process, so that the detection precision of the metal floating sealing ring to be detected can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of sealing performance detection, and in particular to a floating sealing test device. Background Art

[0002] During the tunneling process of the shield machine, the cutter fixed on the cutterhead generally directly contacts the rock, and then crushes the rock and discharges it through high stress. Among them, the metal floating seal ring is the key sealing component when the cutter rotates, so it is urgent to conduct a sealing performance test on the metal floating seal ring to detect the sealing service performance of the metal floating seal ring under complex and extreme working conditions.

[0003] In the related art, the entire shield machine cutter is generally placed in a sealed chamber filled with mud and water, and the cutter is driven to roll to detect the sealing performance of the metal floating sealing ring during the rolling process.

[0004] However, during the tunneling process of shield machines, metal floating seal rings are often used in complex and extreme environments such as high pressure, high temperature, high strength, high impact, and accompanied by muddy water particles. The sealing performance test of metal floating seal rings in related technologies is difficult to simulate the actual working conditions of the roller cutter during tunneling, which will lead to a decrease in the test effect. Summary of the invention

[0005] Based on this, it is necessary to provide a floating seal test device to address the problem that the sealing performance test of the metal floating seal ring in the relevant technology is difficult to simulate the actual working conditions of the roller cutter during the excavation process, which will lead to a decrease in the test effect.

[0006] The present application provides a floating seal test device, the floating seal test device comprising:

[0007] A central shaft, wherein the central shaft is fixedly connected to a first end cover in a circumferential direction around the axis of the central shaft;

[0008] A sealing cover, wherein the sealing cover has a sealing cavity, the central axis is passed through the sealing cover and placed in the sealing cavity, the first end cover and the sealing cover can be clamped with a metal floating sealing ring to be tested, and the first end cover divides the sealing cavity into a first cavity and a second cavity under the sealing effect of the metal floating sealing ring to be tested;

[0009] A driving mechanism, the driving mechanism is connected to the sealing cover and is used to drive the sealing cover to rotate relative to the first end cover around the axis of the central axis;

[0010] a pressurizing mechanism, the pressurizing mechanism being in communication with the first chamber and being used to pressurize the first chamber;

[0011] An impact mechanism, the impact mechanism is used to impact the side wall of the sealing cover so that the sealing cover squeezes the metal floating sealing ring to be tested;

[0012] A detection mechanism, wherein the detection mechanism is connected to the first chamber and is used to monitor the pressure of the first chamber; and / or the detection mechanism is connected to the second chamber and is used to monitor the pressure of the second chamber.

[0013] When the floating seal test device is used, the metal floating seal ring to be tested is clamped between the first end cover and the sealing cover, so that the real clamping condition of the metal floating seal ring can be simulated; when the driving mechanism drives the sealing cover to rotate relative to the first end cover around the axis of the central axis, the real operating condition of the cutter body relative to the end cover (upper end cover or lower end cover) of the cutter can be simulated; when the pressurizing mechanism pressurizes the first chamber, the real pressure environment of the cutter in high-pressure muddy water can be simulated; when the impact mechanism impacts the side wall of the sealing cover, the impact condition of the cutter during the excavation process can be simulated. In the case where the above scheme restores the real working condition of the metal floating seal ring, the sealing performance of the metal floating seal ring can be detected by monitoring the pressure change of the first chamber or the second chamber through the detection mechanism. Specifically, if the pressure change of the first chamber or the second chamber under the above working condition is within the normal fluctuation range, it means that the metal floating seal ring has no sealing failure, and if the pressure change of the first chamber or the second chamber under the above working condition exceeds the normal fluctuation range, it means that the metal floating seal ring has sealing failure. Therefore, the above-mentioned floating seal test device restores the actual operating conditions of the metal floating seal ring when in use, improves the detection accuracy of the sealing performance of the metal floating seal ring, and utilizes the pressure monitoring method of the first cavity and the second cavity to realize the detection of sealing failure, which helps to improve the detection accuracy.

[0014] In one embodiment, the floating seal test device also includes a floating seal seat, which is clamped on the inner wall of the peripheral side of the sealing cover and sealingly abuts against the inner wall of the sealing cover. The floating seal seat is provided with an abutment ring surface on the side away from the sealing cover. The first end cover is provided with a clamping groove for clamping the metal floating seal ring to be tested. The metal floating seal ring to be tested has a first sealing surface and a second sealing surface. The first sealing surface is used to abut against the abutment ring surface, and the second sealing surface is used to abut against the wall surface of the clamping groove.

[0015] In one embodiment, the pressurizing mechanism includes a mud and water pressurizing device and a pressurizing pipe. The pressurizing pipe is passed through the central axis and connected to the first cavity. The mud and water pressurizing device is used to introduce mud and water into the first cavity through the pressurizing pipe.

[0016] In one embodiment, the detection mechanism includes a pressure sensor, which is connected to the pressurized pipe and is used to monitor the pressure of the first chamber; and / or, the detection mechanism includes a pressure sensor and a detection tube, which is connected to the second chamber, and the pressure sensor is used to monitor the pressure of the second chamber.

[0017] In one embodiment, the sealing cover includes a sealing body and a second end cover that are detachably connected, the sealing body cover is arranged on the central axis, and an opening is arranged at the center of the second end cover, and the hole wall of the opening is sealed and abutted against the peripheral side of the central axis around the axis of the central axis.

[0018] In one embodiment, the metal floating sealing ring to be tested is a first floating sealing ring, a second floating sealing ring is provided between the second end cover and the central axis, and the second end cover can squeeze the second floating sealing ring along an axial direction perpendicular to the central axis.

[0019] In one of the embodiments, the floating seal test device further comprises a tapered roller bearing assembly, wherein the tapered roller bearing assembly is disposed between the sealing cover and the central shaft around the axis of the central shaft.

[0020] In one embodiment, the floating seal test device also includes a test bench, the second end cover is rotatably connected to the test bench, the center shaft is fixedly connected to the test bench, and the floating seal test device also includes a thrust bearing, which is arranged between the second end cover and the test bench.

[0021] In one embodiment, the driving mechanism includes a driving host, a torque sensor and a transmission belt. The driving host is connected to the sealing cover through the transmission belt. The torque sensor is electrically connected to the driving host. The torque sensor is used to detect the torque of the driving host to drive the sealing cover to rotate.

[0022] In one of the embodiments, the floating seal test device further comprises an impact ring, which is arranged on the peripheral outer wall of the sealing cover and is used to receive the impact of the impact mechanism.

[0023] In one of the embodiments, the sealing cover is further provided with a pressure relief port, and the pressure relief port is used to relieve pressure in the first chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the structural diagram of the hob.

[0025] Figure 2 for Figure 1 Front view of the reel shown.

[0026] Figure 3 for Figure 2 A cross-sectional view of the hob shown at AA.

[0027] Figure 4 for Figure 1 Schematic diagram of the structure of the metal floating sealing ring of the hob shown.

[0028] Figure 5 It is a structural schematic diagram of a floating seal test device in one embodiment of the present application.

[0029] Figure 6 for Figure 5 A partial structural cross-sectional view of the floating seal test device shown.

[0030] Figure 7 for Figure 6 The cross-sectional view shown is an enlarged view at point B.

[0031] Description of Figure Numbers

[0032] 10. Hob; 11. Metal floating sealing ring; 11a. First sealing surface; 11b. Second sealing surface; 12. Cutter body; 13. Cutter ring; 14. Upper end cover; 15. Lower end cover; 16. Cutter shaft; 20. Floating seal test device; 100. Center axis; 110. First end cover; 110a. Card slot; 200. Sealing cover; 200a. Sealing cavity; a1. First cavity; a2. Second cavity; 200b. Observation window; 200c. Pressure relief port; 210. Sealing body; 211. First sealing cover; 212. Second sealing cover; 220. The second end cover; 300, driving mechanism; 310, driving host; 320, torque sensor; 330, transmission belt; 400, pressurizing mechanism; 410, mud and water pressurizing device; 420, pressurizing pipeline; 500, impact mechanism; 600, detection mechanism; 610, pressure sensor; 620, detection tube; 700, floating seal seat; 700a, abutment ring surface; 800, tapered roller bearing assembly; 900, second floating seal ring; 1000, test bench; 1100, thrust bearing; 1200, impact ring; 1300, controller. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] First combine Figure 1-Figure 3 As shown, Figure 1 The structure diagram of the hob 10 of the shield machine is shown. Figure 2 for Figure 1 A front view of the hob 10 is shown, Figure 3 for Figure 2 The hob 10 is shown in cross-section at AA.

[0040] The cutter 10 includes a metal floating sealing ring 11, a cutter body 12, a cutter ring 13, an upper end cover 14, a lower end cover 15 and a cutter shaft 16. The cutter shaft 16 is used to be fixed on the cutter head of the shield machine, and the cutter body 12 is used to rotate relative to the cutter shaft 16 to drive the cutter ring 13 to rotate and excavate. There are two metal floating sealing rings 11, which are respectively arranged between the upper end cover 14 and the cutter body 12, and between the lower end cover 15 and the cutter body 12, so as to prevent mud and water from invading the interior of the cutter 10 during the excavation process to damage the cutter 10.

[0041] Specifically, during the tunneling process of the shield machine, the cutter 10 on the cutter head directly contacts the rock and crushes the rock through high stress and then discharges it. In order to prevent the collapse of the tunneling face, the shield machine often uses muddy water injection to balance the water and soil pressure of the tunneling face. Therefore, the cutter 10 will run in a high-pressure muddy water environment for a long time. At this time, the muddy water in the tunneling face in the high-pressure environment is easy to invade the internal structure of the cutter 10, thereby causing failure forms such as rust of the bearing of the cutter 10, or causing the torque of the cutter 10 to rise sharply or even stop rotating, resulting in abnormal damage such as eccentric wear of the cutter ring 13. On the other hand, the tunneling route of the shield machine often passes through soft upper and hard lower strata and is often accompanied by isolated rocks and fault zones. There is often a violent impact between the cutter 10 and the rock, resulting in a sealing gap in the floating seal, and high-pressure muddy water is easier to invade the internal structure of the cutter 10. Therefore, when conducting a sealing performance test of the metal floating sealing ring 11 to be tested, the sealing performance of the metal floating sealing ring 11 to be tested is tested under the real working conditions of the simulated cutter 10 during the tunneling process, which is more accurate for the test results.

[0042] In view of the problem that the sealing performance test of the metal floating sealing ring 11 in the related art is difficult to simulate the actual working condition of the roller cutter 10 during the excavation process, the present application provides a floating sealing test device 20.

[0043] In one embodiment, in combination Figure 5-Figure 7 As shown, the floating seal test device 20 includes a central shaft 100, a sealing cover 200, a driving mechanism 300, a pressurizing mechanism 400, an impact mechanism 500 and a detection mechanism 600. The central shaft 100 is fixedly connected with a first end cover 110 in the circumferential direction around its axis. The sealing cover 200 has a sealing cavity 200a, the central shaft 100 is passed through the sealing cover 200 and placed in the sealing cavity 200a, and the first end cover 110 and the sealing cover 200 can be clamped with the metal floating seal ring 11 to be tested. The first end cover 110 divides the sealing cavity 200a into a first cavity a1 and a second cavity a2 under the sealing effect of the metal floating seal ring 11 to be tested. The driving mechanism 300 is connected to the sealing cover 200 and is used to drive the sealing cover 200 to rotate relative to the first end cover 110 around the axis of the central shaft 100. The pressurizing mechanism 400 is connected to the first cavity a1 and is used to pressurize the first cavity a1. The impact mechanism 500 is used to impact the side wall of the sealing cover 200, so that the sealing cover 200 squeezes the metal floating sealing ring 11 to be tested. The detection mechanism 600 is connected to the first cavity a1 and is used to monitor the pressure of the first cavity a1; or the detection mechanism 600 is connected to the second cavity a2 and is used to monitor the pressure of the second cavity a2; or the detection mechanism 600 is connected to the first cavity a1 and the second cavity a2 at the same time and is used to monitor the pressure of the first cavity a1 and the second cavity a2 at the same time.

[0044] When the above-mentioned floating seal test device 20 is in use, the metal floating seal ring 11 to be tested needs to be clamped between the first end cover 110 and the sealing cover 200. Then, the driving mechanism 300 is started to rotate the sealing cover 200 relative to the first end cover 110 around the axis of the central axis 100. Then, the pressurizing mechanism 400 is started so that the pressurizing mechanism 400 pressurizes the first chamber a1 and pressurizes the first chamber a1 to a preset pressure value. Further, the impact mechanism 500 is started so that the impact mechanism 500 impacts the sealing cover 200 at a preset frequency and a preset power. Finally, the detection mechanism 600 is started to monitor the pressure of the first chamber a1; and / or, monitor the pressure of the second chamber a2.

[0045] The above-mentioned metal floating sealing ring 11 to be tested is clamped between the first end cover 110 and the sealing cover 200, so that the actual clamping condition of the metal floating sealing ring 11 can be simulated; when the driving mechanism 300 drives the sealing cover 200 to rotate relative to the first end cover 110 around the axis of the central axis 100, the actual operating condition of the cutter body 12 of the roller cutter 10 relative to the end cover (upper end cover 14 or lower end cover 15) of the roller cutter 10 can be simulated; when the pressurizing mechanism 400 pressurizes the first chamber a1, the actual pressure environment of the roller cutter 10 in high-pressure muddy water can be simulated; when the impact mechanism 500 impacts the side wall of the sealing cover 200, the impact condition to which the roller cutter 10 is subjected during the excavation process can be simulated.

[0046] In the case where the above scheme restores the real working condition of the metal floating seal ring 11, the sealing performance of the metal floating seal ring 11 to be tested can be detected by only monitoring the pressure change of the first chamber a1 or the second chamber a2 through the detection mechanism 600. Specifically, if the pressure change of the first chamber a1 or the second chamber a2 under the above working condition is within the normal fluctuation range, it means that the metal floating seal ring 11 to be tested has no sealing failure, and if the pressure change of the first chamber a1 or the second chamber a2 under the above working condition exceeds the normal fluctuation range, it means that the metal floating seal ring 11 to be tested has a sealing failure.

[0047] Therefore, the floating seal test device 20 restores the real operating condition of the metal floating seal ring 11 when in use, improves the detection accuracy of the sealing performance of the metal floating seal ring 11 to be tested, and utilizes the pressure monitoring method of the first cavity a1 and the second cavity a2 to realize the detection of sealing failure, which helps to improve the detection accuracy.

[0048] In addition, compared with the traditional detection method, the floating seal test device 20 of the present application does not need to drive the entire hob 10 to detect the sealing performance of the metal floating seal ring 11 to be tested, which simplifies the detection process and reduces the damage to the hob 10. When in use, the floating seal test device 20 of the present application only needs to clamp the metal floating seal ring 11 to be tested between the first end cover 110 and the sealing cover 200, and then start the corresponding mechanism (driving mechanism 300, pressurizing mechanism 400, impact mechanism 500 and detection mechanism 600) to realize the sealing performance detection of the metal floating seal ring 11 to be tested. The detection steps are simple and efficient. Therefore, the above-mentioned floating seal test device 20 also helps to realize batch detection of metal floating seal rings 11, thereby improving the detection efficiency.

[0049] Combination Figure 6 As shown, in some embodiments, the sealing cover 200 includes a sealing body 210 and a second end cover 220 that are detachably connected. The sealing body 210 is covered on the central axis 100. An opening is provided at the center of the second end cover 220. The hole wall of the opening is sealed against the peripheral side of the central axis 100 around the axis of the central axis 100. This helps to improve the sealing performance of the second cavity a2 during the rotation of the sealing cover 200 relative to the central axis 100, and facilitates the detection mechanism 600 to monitor the pressure of the second cavity a2.

[0050] In some embodiments, the sealing body 210 further includes a detachable first sealing cover 211 and a second sealing cover 212, and the first sealing cover 211 is sealed and connected to the second sealing cover 212. Specifically, in this embodiment, the metal floating sealing ring 11 to be tested is arranged between the first end cover 110 and the first sealing cover 211, and the second sealing cover 212 and the first end cover 110 are enclosed to form a first cavity a1. The detachable arrangement of the first sealing cover 211 and the second sealing cover 212 helps to improve the ease of installation of the floating seal test device 20.

[0051] Continue to combine Figure 6 As shown, in some embodiments, the metal floating sealing ring 11 to be tested is a first floating sealing ring, and a second floating sealing ring 900 is provided between the second end cover 220 and the central axis 100 . The second end cover 220 can squeeze the second floating sealing ring 900 along the axial direction perpendicular to the central axis 100 .

[0052] Specifically, combined Figure 3 As shown, in the actual installation of the metal floating seal ring 11, the upper end cover 14 and the lower end cover 15 of the hob 10 are both provided with corresponding metal floating seal rings 11, so the actual stress condition of the metal floating seal ring 11 is a condition where both ends of the hob 10 are stressed. In this embodiment, by providing a second floating seal ring 900 between the second end cover 220 and the central shaft 100, when the sealing cover 200 is impacted, the metal floating seal ring 11 to be tested and the second floating seal ring 900 at both ends of the central shaft 100 are both squeezed, so that the sealing effect of the metal floating seal ring 11 to be tested under actual working conditions can be simulated, thereby improving the detection accuracy of the metal floating seal ring 11 to be tested.

[0053] Combination Figure 7 As shown, in some embodiments, the floating seal test device 20 also includes a floating seal seat 700, which is clamped on the inner wall of the peripheral side of the sealing cover 200 and is sealed and abutted with the inner wall of the sealing cover 200. The side of the floating seal seat 700 facing away from the sealing cover 200 is provided with an abutment ring surface 700a, and the first end cover 110 is provided with a clamping groove 110a for clamping the metal floating seal ring 11 to be tested.

[0054] In addition, combined Figure 4 and Figure 7 As shown, the metal floating sealing ring 11 to be tested has a first sealing surface 11a and a second sealing surface 11b. The first sealing surface 11a is used to abut against the abutting ring surface 700a, and the second sealing surface 11b is used to abut against the wall surface of the groove 110a. In this way, the actual abutting sealing condition of the upper and lower abutments of the metal floating sealing ring 11 of the hob 10 can be simulated.

[0055] Furthermore, when the impact mechanism 500 impacts the sealing cover 200, the floating sealing seat 700 will squeeze the metal floating sealing ring 11 to be tested under the impact, thereby simulating the actual working condition in which the metal floating sealing ring 11 is impacted and subjected to floating extrusion, thereby helping to improve the detection accuracy of the sealing performance of the metal floating sealing ring 11 to be tested.

[0056] Combination Figure 5 As shown, in some embodiments, the pressurizing mechanism 400 includes a mud and water pressurizing device 410 and a pressurizing pipe 420. The pressurizing pipe 420 passes through the central axis 100 and is connected to the first cavity a1. The mud and water pressurizing device 410 is used to introduce mud and water into the first cavity a1 through the pressurizing pipe 420. This helps to simulate the high-pressure mud and water environment of the metal floating sealing ring 11 to be tested under actual working conditions, thereby improving the sealing performance detection accuracy of the metal floating sealing ring 11 to be tested.

[0057] Specifically, during the tunneling process of the shield machine, the cutter 10 on the cutter head directly contacts the rock and crushes the rock through high stress and then discharges it. In order to prevent the collapse of the tunneling face, the shield machine often injects mud water to balance the water and soil pressure of the tunneling face. Therefore, the cutter 10 will operate in a high-pressure mud water environment for a long time. In this embodiment, the specific pressure of the mud water pressurization can be adjusted according to the detection requirements. Adaptively, in this embodiment, the pressurization temperature of the mud water pressurization device 410 can also be adjusted adaptively, so that the actual working condition of the metal floating sealing ring 11 to be tested can be further restored.

[0058] Combination Figure 5 As shown, in some embodiments, the floating seal test device 20 further includes a controller 1300, which is electrically connected to the pressurizing mechanism 400, the impact mechanism 500, the driving mechanism 300, and the detection mechanism 600, and is used to control the pressurizing pressure and pressurizing temperature of the pressurizing mechanism 400, the impact frequency and impact power of the impact mechanism 500, the output power of the driving mechanism 300, and the pressure display of the detection mechanism 600. Further, the controller 1300 further includes a switch structure for controlling the switch of the floating seal test device 20.

[0059] Combination Figure 5As shown, in some embodiments, the detection mechanism 600 includes a pressure sensor 610, which is connected to the pressurized pipe 420, and the pressure sensor 610 is used to monitor the pressure of the first chamber a1; or the detection mechanism 600 includes a pressure sensor 610 and a detection tube 620, the detection tube 620 is connected to the second chamber a2, and the pressure sensor 610 is used to monitor the pressure of the second chamber a2; or the detection mechanism 600 includes a pressure sensor 610 and a detection tube 620, the detection tube 620 is connected to the second chamber a2, and the pressure sensor 610 is connected to the pressurized pipe 420 and the detection tube 620 at the same time, and the pressure sensor 610 is used to monitor the pressure of the first chamber a1 and the second chamber a2 at the same time, so that the pressure changes of the first chamber a1 or the second chamber a2 can be monitored in real time.

[0060] Combination Figure 6 As shown, in some embodiments, the floating seal test device 20 further includes a tapered roller bearing assembly 800, which is disposed between the sealing cover 200 and the central axis 100 around the axis of the central axis 100. Specifically, the tapered roller bearing assembly 800 is used as a bearing assembly for the sealing cover 200 to rotate relative to the central axis 100, and is used to withstand the high speed and high pressure of the sealing cover 200, and the tapered roller bearing assembly 800 is interference fit with the central axis 100, which helps to improve the stability of the tapered roller bearing assembly 800.

[0061] Combination Figure 5 and Figure 6 As shown, in some embodiments, the floating seal test device 20 also includes a test bench 1000, the second end cover 220 is rotatably connected to the test bench 1000, the center shaft 100 is fixedly connected to the test bench 1000, and the floating seal test device 20 also includes a thrust bearing 1100, which is arranged between the second end cover 220 and the test bench 1000. The arrangement of the thrust bearing 1100 helps to improve the structural stability of the floating seal test device 20.

[0062] Specifically, under the condition of interference fit between the tapered roller bearing assembly 800 and the center shaft 100, after long-term operation, the tapered roller bearing assembly 800 is prone to friction with the center shaft 100 and slide down, which in turn causes the tapered roller bearing assembly 800 to have a reduced load-bearing effect on the sealing cover 200, and then causes the sealing cover 200 to have a reduced extrusion effect on the metal floating sealing ring 11 to be tested, affecting the sealing performance detection accuracy of the metal floating sealing ring 11 to be tested.

[0063] In this embodiment, by setting the thrust bearing 1100, the thrust effect of the thrust bearing 1100 on the sealing cover 200 can be effectively exerted, thereby effectively avoiding the problem of reduced squeezing effect on the metal floating sealing ring 11 to be tested caused by the sliding of the tapered roller bearing assembly 800, thereby improving the sealing performance detection accuracy of the metal floating sealing ring 11 to be tested.

[0064] Combination Figure 5 As shown, in some embodiments, the driving mechanism 300 includes a driving host 310, a torque sensor 320 and a transmission belt 330. The driving host 310 is connected to the sealing cover 200 through the transmission belt 330. The torque sensor 320 is electrically connected to the driving host 310. The torque sensor 320 is used to detect the torque of the driving host 310 to drive the sealing cover 200 to rotate. In this way, the output power of the driving host 310 can be adjusted according to actual detection requirements, and then the rotational torque of the sealing cover 200 can be adjusted to meet different detection needs.

[0065] Continue to combine Figure 5 and Figure 6 As shown, in some embodiments, the floating seal test device 20 also includes an impact ring 1200, which is arranged on the outer wall of the peripheral side of the sealing cover 200. The impact ring 1200 is used to receive the impact of the impact mechanism 500, so as to avoid the impact mechanism 500 directly colliding with the sealing cover 200 and causing deformation of the sealing cover 200, thereby facilitating the maintenance of the floating seal test device 20.

[0066] Furthermore, combined with Figure 3 As shown, in the actual working condition of the hob 10, the impact borne by the cutter body 12 is generally transmitted to the cutter body 12 by the cutter ring 13. Therefore, in this embodiment, the provision of the impact ring 1200 helps to transmit the impact from the impact ring 1200 to the sealing cover 200, thereby simulating the impact condition of the metal floating sealing ring 11 to be tested under the actual working condition, thereby improving the detection accuracy of the metal floating sealing ring 11 to be tested.

[0067] Combination Figure 6 As shown, in some embodiments, the sealing cover 200 is further provided with an observation window 200b, which helps the inspector to observe the situation inside the sealing cover 200 and facilitates the inspector to make timely adjustments.

[0068] Combination Figure 6 As shown, in some embodiments, the sealing cover 200 is further provided with a pressure relief port 200c, which is used to relieve pressure in the first chamber a1, thereby preventing excessive pressure in the first chamber a1 and timely relieving pressure in the over-pressured first chamber a1, thereby improving the safety of the test.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A floating seal test device, characterized in that: The floating seal test device comprises: A central shaft, wherein the central shaft is fixedly connected to a first end cover in a circumferential direction around the axis of the central shaft; A sealing cover, wherein the sealing cover has a sealing cavity, the central axis is passed through the sealing cover and placed in the sealing cavity, the first end cover and the sealing cover can be clamped with a metal floating sealing ring to be tested, and the first end cover divides the sealing cavity into a first cavity and a second cavity under the sealing effect of the metal floating sealing ring to be tested; A driving mechanism, the driving mechanism is connected to the sealing cover and is used to drive the sealing cover to rotate relative to the first end cover around the axis of the central axis; a pressurizing mechanism, the pressurizing mechanism being in communication with the first chamber and being used to pressurize the first chamber; An impact mechanism, the impact mechanism is used to impact the side wall of the sealing cover so that the sealing cover squeezes the metal floating sealing ring to be tested; A detection mechanism, wherein the detection mechanism is connected to the first chamber and is used to monitor the pressure of the first chamber; and / or the detection mechanism is connected to the second chamber and is used to monitor the pressure of the second chamber.

2. The floating seal test device according to claim 1, characterized in that: The floating seal test device also includes a floating seal seat, which is clamped on the inner wall of the peripheral side of the sealing cover and sealingly abuts against the inner wall of the sealing cover. The floating seal seat is provided with an abutting ring surface on the side away from the sealing cover. The first end cover is provided with a clamping groove for clamping the metal floating seal ring to be tested. The metal floating seal ring to be tested has a first sealing surface and a second sealing surface. The first sealing surface is used to abut against the abutting ring surface, and the second sealing surface is used to abut against the wall surface of the clamping groove.

3. The floating seal test device according to claim 1, characterized in that: The pressurizing mechanism includes a muddy water pressurizing device and a pressurizing pipeline. The pressurizing pipeline is passed through the central axis and connected to the first cavity. The muddy water pressurizing device is used to introduce muddy water into the first cavity through the pressurizing pipeline.

4. The floating seal test device according to claim 3, characterized in that: The detection mechanism includes a pressure sensor, which is connected to the pressurized pipe and is used to monitor the pressure of the first chamber; and / or the detection mechanism includes a pressure sensor and a detection tube, which is connected to the second chamber and is used to monitor the pressure of the second chamber.

5. The floating seal test device according to claim 1, characterized in that: The sealing cover comprises a detachably connected sealing body and a second end cover, wherein the sealing body cover is arranged on the central axis, and an opening is arranged at the center of the second end cover, and the hole wall of the opening is sealed against the peripheral side of the central axis around the axis of the central axis.

6. The floating seal test device according to claim 5, characterized in that: The metal floating sealing ring to be tested is a first floating sealing ring, a second floating sealing ring is provided between the second end cover and the central axis, and the second end cover can squeeze the second floating sealing ring along an axial direction perpendicular to the central axis.

7. The floating seal test device according to claim 6, characterized in that: The floating seal test device further comprises a tapered roller bearing assembly, and the tapered roller bearing assembly is arranged between the sealing cover and the central shaft around the axis of the central shaft.

8. The floating seal test device according to claim 7, characterized in that: The floating seal test device also includes a test bench, the second end cover is rotatably connected to the test bench, the central shaft is fixedly connected to the test bench, and the floating seal test device also includes a thrust bearing, which is arranged between the second end cover and the test bench.

9. The floating seal test device according to claim 1, characterized in that: The driving mechanism includes a driving host, a torque sensor and a transmission belt. The driving host is connected to the sealing cover through the transmission belt. The torque sensor is electrically connected to the driving host. The torque sensor is used to detect the torque of the driving host driving the sealing cover to rotate.

10. The floating seal test device according to claim 1, characterized in that: The floating seal test device further comprises an impact ring, which is arranged on the peripheral outer wall of the sealing cover and is used to receive the impact of the impact mechanism.

11. The floating seal test device according to claim 1, characterized in that: The sealing cover is also provided with a pressure relief port, and the pressure relief port is used to relieve pressure in the first chamber.

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