Compensation mechanism and main drive sealing device

Abstract

This invention discloses a sealing compensation mechanism and a main drive sealing device, comprising: a status monitoring structure for generating a sealing compensation command when the sealing state between the sealing element and the mating element is abnormal; a sealing compensation structure movably disposed on the mating element; and a drive structure for driving the sealing compensation structure to move between the sealing element and the mating element according to the sealing compensation command. This invention uses a drive structure to move the sealing compensation structure between the sealing element and the sealing slide according to the sealing compensation command to perform sealing compensation, thereby automatically adjusting the sealing state to an optimal state when the sealing state between the sealing element and the mating element is abnormal. This invention also utilizes a sealing compensation mechanism installed on the sealing track to perform sealing compensation when the sealing state between the sealing track and the sealing element is abnormal, thereby meeting the sealing requirements between the sealing track and the sealing element and ensuring the safe operation of the main drive device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunneling equipment, in particular to a sealing compensation mechanism and a main drive sealing device. BACKGROUND

[0002] Tunneling equipment plays an important role in underground engineering construction, and the sealing structure as the immune system of the tunneling equipment plays an important role in blocking external media and is a key factor to ensure the safe operation of the equipment.

[0003] During the tunneling process of the tunneling equipment, due to the long-term friction and wear between the sealing element and the runway, especially when foreign impurities break through the labyrinth cavity and enter the front end of the sealing element, the wear phenomenon will increase sharply. Once the sealing element or the sealing runway is severely worn, the sealing element loses its sealing function, and in severe cases, it even endangers the safety of the entire main drive system. Currently, the sealing or sealing runway is replaced to solve the wear problem of the sealing element, and the sealing runway is adjusted to replace the wear of the sealing element, but the height change after the wear of the sealing element is not considered, and the replacement of the sealing runway cannot meet the actual sealing demand, and each adjustment object is the entire sealing runway. Due to the limited space in the front end of the sealing element, the overall movement distance of the sealing runway is limited, which causes the position of the sealing runway that has been worn to interfere with the position after the adjustment, which may further aggravate the wear of the sealing element. In addition, the overall movement of the sealing runway cannot be automatically adjusted according to the wear state of each sealing element, and precise adjustment cannot be achieved. SUMMARY

[0004] The purpose of the present application is to provide a sealing compensation mechanism and a main drive sealing device to solve the technical problem that the sealing element loses its sealing function due to the severe wear of the sealing element or the sealing runway, and the replacement of the sealing runway cannot meet the actual sealing demand.

[0005] The above-mentioned purpose of the present application can be realized by using the following technical scheme:

[0006] The present application provides a sealing compensation mechanism, comprising: a state monitoring structure for generating a sealing compensation instruction when the sealing state between a sealing element and a cooperating element is abnormal; a sealing compensation structure movably arranged on the cooperating element; and a driving structure for driving the sealing compensation structure to move between the sealing element and the cooperating element according to the sealing compensation instruction.

[0007] In an embodiment of the present application, the sealing compensation structure is movably arranged on the cooperating element in the axial direction of the cooperating element, and the sealing compensation structure is located between the sealing element and the driving structure in the axial direction of the cooperating element.

[0008] In the embodiment of the present application, the state monitoring structure comprises a distance monitoring module, which is arranged axially apart from the sealing member, and is used to monitor the distance between the distance monitoring module and the sealing member.

[0009] In the embodiment of the present application, the state monitoring structure further comprises a control module, which is connected with the driving structure and the distance monitoring module respectively, and is used to generate the sealing compensation instruction when the distance between the distance monitoring module and the sealing member is lower than a set distance, and the distance difference between them is lower than a safety value.

[0010] In the embodiment of the present application, the distance monitoring module is connected with the control module through a signal line, and the fitting member is provided with a threading hole for threading the signal line.

[0011] In the embodiment of the present application, the distance monitoring module is installed on the fitting member through a fixing structure, and the sealing compensation structure is located between the fixing structure and the fitting member in the radial direction of the fitting member.

[0012] In the embodiment of the present application, the end of the sealing compensation structure close to the sealing member is provided with a guide slope, which is arranged to extend and incline to the side of the fitting member from the end away from the sealing member to the end close to the sealing member.

[0013] In the embodiment of the present application, the number of the guide slopes is multiple, the end of the sealing compensation structure close to the sealing member is provided with multiple sealing compensation step surfaces, the multiple sealing compensation step surfaces are arranged to extend along the moving direction of the sealing compensation structure and are arranged in a stepped manner, and the multiple guide slopes are connected with the ends of the multiple sealing compensation step surfaces close to the sealing member respectively.

[0014] In the embodiment of the present application, the sealing compensation structure comprises a sliding sealing ring, which is in sliding fit with the fitting member in the axial direction of the fitting member, and can slide to the space between the sealing member and the fitting member under the driving of the driving structure.

[0015] In the embodiment of the present application, the sealing compensation structure further comprises a sliding limiting member, which is connected with the sliding sealing ring, and the fitting member is provided with a limiting sliding groove, and the sliding limiting member can slide in the limiting sliding groove along the axial direction of the fitting member.

[0016] In the embodiment of the present application, the limiting sliding groove is provided with an elastic limiting piece, and the sliding limiting piece is limited between the driving structure and the elastic limiting piece; and / or the groove bottom of the limiting sliding groove is provided with a first limiting inclined surface, which is arranged to extend and incline from one end thereof away from the sealing piece to the other end thereof close to the sealing piece towards the side close to the sliding limiting piece, and the sliding limiting piece is provided with a second limiting inclined surface which can abut against the first limiting inclined surface.

[0017] In the embodiment of the present application, the driving structure comprises a driving air bag, which can push the sealing compensation structure to slide towards the sealing piece under the action of inflation.

[0018] In the embodiment of the present application, the fitting piece is provided with a pipe penetrating hole, and the driving structure further comprises an air pipe which is penetratingly arranged in the pipe penetrating hole and is in communication with the driving air bag.

[0019] In the embodiment of the present application, the sealing piece is a lip-shaped sealing piece, and the sealing piece has a sealing back surface arranged away from the mounting lip portion, and the sealing compensation structure can slide to the space between the sealing back surface and the fitting piece under the driving of the driving structure.

[0020] The present application also provides a main driving sealing device comprising the sealing compensation mechanism.

[0021] The present application has the following characteristics and advantages:

[0022] The sealing compensation mechanism of the present application is provided with the sealing compensation structure which can move along the axial direction of the fitting piece, and the sealing compensation instruction is generated by the state monitoring structure according to the sealing state between the sealing piece and the fitting piece, so that the driving structure can drive the sealing compensation structure to move to the space between the sealing piece and the sealing sliding groove for sealing compensation according to the sealing compensation instruction, thereby adjusting the sealing state to a better state through automatic sealing compensation when the sealing state between the sealing piece and the fitting piece is abnormal.

[0023] The main driving sealing device of the present application is provided with the sealing compensation mechanism on the sealing runway, and the sealing compensation mechanism is used to perform sealing compensation when the sealing state between the sealing runway and the sealing piece is abnormal, thereby meeting the sealing requirement between the sealing runway and the sealing piece and ensuring the safe operation of the main driving device. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0025] Figure 1 The figure is a structural schematic diagram of the sealing compensation mechanism in an embodiment of the present application.

[0026] Figure 2 The figure is an installation schematic diagram of the distance monitoring module in an embodiment of the present application.

[0027] Figure 3 The figure is a structural schematic diagram of the sealing member in different sealing states in an embodiment of the present application.

[0028] Figure 4 The figure is a structural schematic diagram of the sealing member before and after sealing compensation in an embodiment of the present application.

[0029] Figure 5 The figure is a control flow chart of the control module in the present application.

[0030] Figure 6 The figure is a structural schematic diagram of the sealing compensation mechanism in another embodiment of the present application.

[0031] Figure 7 The figure is an installation schematic diagram of the distance monitoring module in another embodiment of the present application.

[0032] Figure 8 The figure is a structural schematic diagram of the main drive sealing structure in an embodiment of the present application.

[0033] Figure 9 The figure is a structural schematic diagram of the main drive sealing structure in another embodiment of the present application.

[0034] In the figure:

[0035] 100, sealing compensation mechanism; 100', sealing compensation mechanism; 1, state monitoring structure; 101, distance monitoring module; 102, fixing structure; 103, fixed runway ring; 104, fixed connecting piece; 105, connecting bolt; 106, signal line; 2, sealing compensation structure; 201, sliding sealing ring; 202, sliding limiting piece; 203, guide slope; 203', guide slope; 204, connecting bolt; 205, first limiting slope; 206, second limiting slope; 207, sealing compensation step surface; 207', sealing compensation step surface; 3, driving structure; 301, driving air bag; 302, air pipe; 4, matching piece; 401, pipe penetrating hole; 402, wire penetrating hole; 403, limiting sliding groove; 5, sealing piece; 501, sealing lip; 501', sealing lip; 502, mounting lip; 503, sealing back surface; 6, sealing runway; 7, driving disc; 8, grease ring; 9, first sealing compression ring; 10, sealing spacer ring; 11, second sealing compression ring; 12, labyrinth cavity. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0037] Embodiment one

[0038] As shown in Figure 1 and Figure 2 , the present application provides a sealing compensation mechanism, comprising: a state monitoring structure 1 for monitoring the sealing state between a sealing piece 5 and a matching piece 4 and generating a sealing compensation instruction according to the sealing state; a sealing compensation structure 2 movably arranged on the matching piece 4 along the axial direction of the matching piece 4; and a driving structure 3, wherein the sealing compensation structure 2 is located between the driving structure 3 and the sealing piece 5 in the axial direction x of the matching piece 4, and the driving structure 3 is used to drive the sealing compensation structure 2 to move to the sealing piece 5 and the matching piece 4 according to the sealing compensation instruction.

[0039] In combination with Figure 8 and Figure 9As shown, the sealing compensation mechanism 100 and sealing compensation mechanism 100' provided by the present invention can be applied to the main drive sealing device of tunneling equipment, with the mating part 4 being the sealing runway 6 of the main drive sealing device. By installing the sealing compensation mechanism on the sealing runway 6, the sealing compensation mechanism performs sealing compensation when the sealing state between the sealing runway 6 and the sealing element 5 is abnormal, thereby meeting the sealing requirements between the sealing runway 6 and the sealing element 5 and ensuring the safe operation of the main drive device. Of course, the sealing compensation mechanism of the present invention can also be applied to other sealing devices according to sealing requirements, without specific limitation.

[0040] The sealing compensation mechanism of the present invention, by providing a movable sealing compensation structure 2 on the mating part 4, and by generating a sealing compensation command based on the sealing state between the sealing part 5 and the mating part 4 through the state monitoring structure 1, enables the driving structure 3 to drive the sealing compensation structure 2 to move between the sealing part 5 and the sealing slide to perform sealing compensation according to the sealing compensation command. This allows for automatic sealing compensation to adjust the sealing state to an optimal state when the sealing state between the sealing part 5 and the mating part 4 is abnormal. For example, after wear occurs between the sealing part 5 and / or the mating part 4, the sealing part 5 remains under a set pressure state, thereby maintaining a better sealing capability, and the sealing part 5 still has a certain bearing force.

[0041] In some embodiments of the present invention, the mating member 4 is generally an annular member, and the sealing member 5 is sealed to the outer surface of the mating member 4, and the mating member 4 is rotatable relative to the sealing member 5. The sealing compensation structure 2 is movably disposed on the mating member 4 along the axial direction z; the sealing compensation structure 2 is located between the driving structure 3 and the sealing member 5 along the axial direction z of the mating member 4.

[0042] In other embodiments of the invention, the seal and the inner surface of the mating member are sealed together. In still other embodiments of the invention, the seal and the end face of the mating member are sealed together. A sealing compensation structure is movably disposed on the mating member radially; the sealing compensation structure is located radially between the driving structure and the seal.

[0043] like Figure 3 As shown, the present invention has discovered that when the pressure state of the seal 5 changes due to its own wear, wear of the mating part 4, or other circumstances, that is, when the sealing capacity changes, the shape of the seal 5 also changes accordingly. Therefore, the condition monitoring structure 1 can use the change in the shape of the seal 5 to monitor the sealing state.

[0044] In the embodiment of the present application, the sealing member 5 is a lip-shaped sealing member, the sealing member 5 has a sealing back surface 503 opposite to the mounting lip 502, and the sealing compensation structure 2 can slide to the sealing back surface 503 and the mating member 4 under the driving of the driving structure 3. Specifically, the sealing member 5 has the mounting lip 502 for mounting and the sealing lip 501 for cooperating with the mating member 4 to seal, and the sealing back surface 503 is located on the sealing lip 501. The change of the pressure state of the sealing member 5 can make the sealing lip 501 swing to change to the sealing lip 501', and the angle between the sealing lip 501 and the mounting lip 502 also changes. When the sealing member 5 is pressed more, the sealing lip 501 swings more to the side close to the mounting lip 502, and the angle between the sealing lip 501 and the mounting lip 502 is smaller; on the contrary, when the sealing member 5 is pressed less, the sealing lip 501 swings more to the side away from the mounting lip 502, and the angle between the sealing lip 501 and the mounting lip 502 is larger.

[0045] In the embodiment of the present application, the state monitoring structure 1 includes a distance monitoring module 101, the distance monitoring module 101 is arranged opposite to the sealing member 5 in the axial direction z of the mating member 4, and the distance monitoring module 101 is used to monitor the distance between the distance monitoring module 101 and the sealing member 5. For example, as shown in Figure 3 the sealing lip 501 is in the initial state, that is, the optimal sealing state; when the sealing lip 501 swings to change to the sealing lip 501' due to wear, the sealing state of the sealing lip 501 is abnormal, and the distance between the sealing member 5 and the fixed distance monitoring module 101 decreases from the distance Di2 to the distance Di1; in combination with Figure 4 shown, after the sealing compensation structure 2 is inserted between the sealing member 5 and the mating member 4 for compensation, the sealing lip 501' swings to change to 501", the distance between the sealing member 5 and the fixed distance monitoring module 101 increases from the distance Di1 to the distance Di3, so as to re-form the optimal sealing state.

[0046] In the embodiment of the present application, the distance monitoring module 101 is arranged close to the sealing back surface 503, when the sealing state between the sealing member 5 and the mating member 4 is abnormal, the sealing lip 501 swings to the side close to the mounting lip 502, and the distance between the sealing member 5 and the distance monitoring module 101 becomes larger.

[0047] Optionally, the distance monitoring module can also be arranged on the opposite side, when the sealing state between the sealing member and the mating member is abnormal, the sealing lip swings to the side close to the mounting lip, and the distance between the sealing member and the distance monitoring module becomes smaller.

[0048] In other embodiments of the present application, the state monitoring structure comprises an angle monitoring module, the angle monitoring module is used to monitor the angle change of the sealing lip 501, and then the sealing state is monitored according to the angle change.

[0049] In combination Figure 5 As shown in the figure, in the embodiments of the present application, the state monitoring structure 1 further comprises a control module, the control module is connected with the driving structure 3 and the distance monitoring module 101 respectively, the control module receives the distance signal acquired by the distance monitoring module 101 and analyzes and generates the sealing state according to the distance signal, and then generates the sealing compensation instruction and issues the sealing compensation instruction to the driving structure 3 when the sealing state is abnormal.

[0050] Specifically, when the main driving device rotates, the control module starts the distance monitoring module 101 to perform real-time monitoring, the control module receives the distance Di between the distance monitoring module 101 and the sealing element 5 acquired by the distance monitoring module 101, and judges whether the distance Di is less than the set distance Do; if not, that is, the distance Di between the distance monitoring module 101 and the sealing element 5 is greater than or equal to the set distance Do, it indicates that the sealing state of the sealing element 5 and the cooperating element 4 meets the requirements, and the sealing compensation structure 2 does not need to be adjusted, and the main driving device keeps rotating; if yes, that is, the distance Di between the distance monitoring module 101 and the sealing element 5 is less than the set distance Do, it is judged whether the distance difference ΔD between the two is less than the safety value m, if yes, the sealing compensation instruction is generated and issued to the driving structure 3, so that the driving structure 3 drives the sealing compensation structure 2 to perform sealing compensation according to the sealing compensation instruction.

[0051] In some embodiments of the present application, while the driving structure 3 drives the sealing compensation structure 2 to move, the distance monitoring module 101 feeds back the distance signal to the control module in real time, until the control module judges that the distance Di is less than the set distance Do, then a stop instruction is generated and issued to the driving structure 3, and the driving structure 3 stops driving the sealing compensation structure 2 to move according to the stop instruction.

[0052] In other embodiments of the present application, after the control module judges that the distance Di between the distance monitoring module 101 and the sealing element 5 is greater than or equal to the set distance Do, the distance difference ΔD between the distance Di and the set distance Do is analyzed to obtain the distance required for the sealing compensation structure 2 to move, and a sealing compensation instruction is generated, and the driving structure 3 directly drives the sealing compensation structure 2 to move the required distance according to the sealing compensation instruction.

[0053] The state monitoring structure 1 further comprises a prompt module. When the distance Di between the distance monitoring module 101 and the sealing element 5 is less than the set distance Do, indicating that the sealing state of the sealing element 5 and the cooperating element 4 is abnormal, a sealing abnormality prompt is generated, and then the main driving device can be controlled to stop rotating according to the sealing abnormality prompt; when the distance difference ΔD between the distance between the distance monitoring module 101 and the sealing element 5 and the set distance is greater than or equal to a safety value m, indicating that the required sealing compensation amount between the sealing element 5 and the cooperating element 4 exceeds the upper limit of the sealing compensation structure 2, that is, the sealing element 5 cannot play a sealing role, a sealing failure prompt is generated, and then the sealing element 5 can be replaced in time according to the sealing failure prompt.

[0054] As shown in Figure 2 some embodiments of the present application, the distance monitoring module 101 is connected to the control module by a signal line 106, and the cooperating element 4 is provided with a threading hole 402 for threading the signal line 106. The distance monitoring module can be a distance sensor or a plurality of distance sensors arranged at intervals along the circumference of the cooperating element, thereby monitoring a plurality of positions of the sealing element. The corresponding threading hole 402 can also be provided with one or more.

[0055] In some other embodiments of the present application, the distance monitoring module can also be connected to the control module by a wireless communication module.

[0056] As shown in Figure 2 embodiments of the present application, the distance monitoring module 101 is mounted on the cooperating element 4 by a fixing structure 102, and the sealing compensation structure 2 is located between the fixing structure 102 and the cooperating element 4 in the radial direction x of the cooperating element 4. By providing the fixing structure 102, on the one hand, the distance monitoring module 101 can be mounted, and on the other hand, the fixing structure 102 can be used to limit the radial position of the sealing compensation structure 2. Specifically, as shown in Figure 1 the fixing structure 102 comprises a fixed runway ring 103 and a fixed connecting piece 104. The fixed connecting piece 104 can be a ring-shaped structure formed by splicing a plurality of arc-shaped blocks, or a block-shaped structure, and is fixedly connected to the cooperating element 4 by welding or other means. The fixed runway ring 103 is connected to the fixed connecting piece 104 by a connecting bolt 105.

[0057] As shown in Figure 1 some embodiments of the present application, the sealing compensation structure 2 comprises a sliding sealing ring 201, which is in sliding cooperation with the cooperating element 4 and can slide to the position between the sealing element 5 and the cooperating element 4 under the driving of the driving structure 3. Specifically, the sliding sealing ring 201 is sleeved on the cooperating element 4 and is in axial sliding cooperation with the cooperating element 4.

[0058] In other embodiments of the present invention, the sealing compensation structure includes a plurality of sliding sealing pieces arranged adjacent to each other along the circumference of the mating member. There are also multiple driving structures, each capable of driving a plurality of sliding sealing pieces to move axially along the mating member.

[0059] like Figure 1 As shown, in some embodiments of the present invention, the driving structure 3 includes a driving airbag 301, and the sealing compensation structure 2 is located between the driving airbag 301 and the sealing member 5 in the axial z direction of the mating member 4. The driving airbag 301 can push the sealing compensation structure 2 toward the sealing member 5 under the action of inflation. Specifically, the mating member 4 is provided with a through hole 401, and the driving structure 3 also includes a vent pipe 302, which passes through the through hole 401 and communicates with the driving airbag 301. The inner side of the fixed track ring 103, the end face of the sliding sealing ring 201 away from the sealing member 5, the end face of the sliding limiting member 202 away from the sealing member 5, the end face of the fixed connecting member 104 near the sealing member 5, and the end face of the limiting groove 403 away from the sealing member 5 enclose a chamber for accommodating the driving airbag 301. The driving airbag 301 can be an annular airbag, with multiple through holes 401 preferably arranged evenly along the circumference of the mating member 4 to allow for the insertion of multiple vent pipes 302. Air is then injected into the driving airbag 301 through these vent pipes, ensuring uniform gas distribution within the airbag. This results in a uniform distribution of the thrust exerted on the sealing compensation structure 2 by the driving airbag 301, enabling the structure to move along the axial direction z of the mating member 4 without deviation. Alternatively, the driving airbag 301 can be of other shapes, with multiple airbags evenly arranged along the circumference of the mating member 4 to drive the sealing compensation structure 2.

[0060] In other embodiments of the present invention, the driving airbag 301 and the venting pipe 302 are not provided. The driving medium flows directly into the cavity from the through hole 401, thereby directly using the driving medium to drive the sealing compensation structure 2 to move axially along the mating part 4.

[0061] like Figure 1As shown, the sealing compensation structure 2 further comprises a sliding limiting piece 202 connected with the sliding sealing ring 201, and a limiting sliding groove 403 is formed on the fitting piece 4, and the sliding limiting piece 202 is in sliding fit with the limiting sliding groove 403 along the axial direction z of the fitting piece 4. By matching the sliding limiting piece 202 with the limiting sliding groove 403, the sliding range of the sliding sealing ring 201 along the axial direction z of the fitting piece 4 is limited. Specifically, the limiting sliding groove 403 can be an annular groove arranged along the circumferential direction of the fitting piece 4, or a strip-shaped groove extending along the axial direction of the fitting piece 4, and the limiting sliding groove 403 can be one or more. The sliding limiting piece 202 can be a ring-shaped structure composed of a plurality of arc-shaped blocks, or a block-shaped structure, and the sliding limiting piece 202 can be one or more.

[0062] In addition, in order to enable the sliding limiting piece 202 to stably slide in the limiting sliding groove 403, in the embodiments of the present application, a proper resistance is added between the sliding limiting piece 202 and the limiting sliding groove 403, and the driving structure 3 overcomes the resistance to push the sliding limiting piece 202 to move, so as to avoid that the sliding limiting piece 202 moves towards the end close to the sealing piece 5 in the limiting sliding groove 403 without being driven by the driving structure 3, and avoid that the driving force applied by the driving structure 3 is too large to cause the sliding limiting piece 202 to directly bounce to the other end of the limiting sliding groove 403.

[0063] In some embodiments of the present application, the groove bottom of the limiting sliding groove 403 is provided with a first limiting inclined surface 205, the first limiting inclined surface 205 is arranged to extend and incline towards the side close to the sliding limiting piece 202 from the end away from the sealing piece to the end close to the sealing piece, the sliding limiting piece 202 is provided with a second limiting inclined surface 206, and the second limiting inclined surface 206 can abut against the first limiting inclined surface 206. The driving structure 3 needs to overcome the resistance when the second limiting inclined surface 206 abuts against the first limiting inclined surface 205 to push the sliding limiting piece 202 to slide, and the sealing compensation structure 2 can be kept at a certain position without moving towards the end close to the sealing piece 5 without being driven by the driving structure 3. Specifically, the inclination of the first limiting inclined surface 205 is slightly larger than the inclination of the second limiting inclined surface 205.

[0064] In another embodiment of the present application, an elastic limiting member is arranged in the limiting sliding groove 403, and the sliding limiting member 202 is limited between the driving structure 3 and the elastic limiting member. By arranging the elastic limiting member, the driving structure 3 needs to overcome the elastic restoring force of the elastic limiting member to push the sliding limiting member 202 to slide, and the sliding limiting member 202 will not move in the limiting sliding groove 403 towards the end close to the sealing member 5 without being driven by the driving structure 3, and thus the sliding sealing ring 201 will not automatically slide towards the sealing member 5. Specifically, the elastic limiting member is arranged along the axial direction z of the fitting member 4. One end of the elastic limiting member is connected with the end face of the end of the limiting sliding groove 403 close to the sealing member 5, and the other end of the elastic limiting member is connected with the sliding limiting member 202.

[0065] As shown in Figure 1 , in an embodiment of the present application, the end of the sealing compensation structure 2 close to the sealing member 5 is provided with at least one guide slope 203, and the guide slope 203 is arranged to extend obliquely towards one side of the fitting member 4 from the end thereof away from the sealing member 5 to the end thereof close to the sealing member 5. The guide slope 203 can guide the sealing compensation structure 2 to be smoothly inserted between the sealing member 5 and the fitting member 4.

[0066] As shown in Figure 1 , in an embodiment of the present application, the number of the guide slopes 203 is one. In addition to the above-mentioned function, the guide slope 203 can also make the greater the distance of the sealing compensation structure 2 moving along the axial direction of the fitting member 4 towards the sealing member 5, the greater the sealing compensation amount provided by the sealing compensation structure 2, so that the distance of the sealing compensation structure 2 moving can be controlled according to the sealing state to realize the adjustment of the sealing compensation amount.

[0067] As shown in Figure 6 , in another embodiment of the present application, the end of the sealing compensation structure 2 close to the sealing member 5 is sequentially provided with the guide slope 203, the sealing compensation step surface 207, the guide slope 203' and the sealing compensation step surface 207' from the end thereof away from the sealing member 5 to the end thereof close to the sealing member 5, and the sealing compensation step surface 207 and the sealing compensation step surface 207' are arranged in a stepped manner along the moving direction of the sealing compensation structure 2 (i.e. the axial direction of the fitting member 4). By arranging the sealing compensation step surfaces 207 and 207' and guiding them through the guide slopes 203 and 203' respectively, the sealing compensation structure 2 can perform multi-stage sealing compensation, i.e. the sealing compensation structure 2 moves along the axial direction of the fitting member 4 towards the sealing member 5, can first stably seal and fit the first-stage sealing compensation step surface 207 with the sealing member 5 under the guidance of the first guide slope 203; if the sealing compensation amount is not enough, the sealing compensation structure 2 continues to move along the axial direction of the fitting member 4 towards the sealing member 5, and thus can stably seal and fit the second-stage sealing compensation step surface 207' with the sealing member 5 under the guidance of the second guide slope 203', thereby providing a greater sealing compensation amount. In combination with Figure 5 andFigure 7 As shown, in this embodiment of the present application, the specific structure and monitoring mode of the state monitoring structure 1, and the specific structure and driving mode of the driving structure 3 can be the same as those of the above-mentioned embodiments, and thus will not be described herein.

[0068] Similarly, in some other embodiments of the present application, the number of guide inclined surfaces and the number of sealing compensation stepped surfaces can be set to three, four or more, so as to be capable of performing three-stage sealing compensation, four-stage sealing compensation or more-stage sealing compensation.

[0069] Embodiment Two

[0070] As shown in Figure 8 and Figure 9 As shown, the present application further provides a main driving sealing device, which comprises the sealing compensation mechanism 100 or the sealing compensation mechanism 100', and the sealing compensation mechanism 100 or the sealing compensation mechanism 100' is installed on a sealing runway 6 of the main driving sealing device. The specific structure, working principle and beneficial effects of the sealing compensation mechanism 100 or the sealing compensation mechanism 100' in this embodiment are the same as those of the corresponding two embodiments of the sealing compensation mechanism in Embodiment One, and thus will not be described herein.

[0071] The main driving sealing device of the present application, by installing the sealing compensation mechanism 100 or the sealing compensation mechanism 100' on the sealing runway 6, so as to utilize the sealing compensation mechanism 100 or the sealing compensation mechanism 100' to perform sealing compensation when the sealing state between the sealing runway 6 and the sealing member 5 is abnormal, so as to meet the sealing requirement between the sealing runway 6 and the sealing member 5, and ensure the safe operation of the main driving device.

[0072] Specifically, the sealing runway 6 is installed on the outer side of a driving disc 7 of the main driving device. The sealing member 5 is installed on the inner side of a grease ring 8, one end of the grease ring 8 is provided with a first sealing compression ring 9, the first sealing compression ring 9 is provided with a second sealing compression ring 11, and the first sealing compression ring 9, the second sealing compression ring 11, the sealing runway 6 and the driving disc 7 cooperatively form a labyrinth cavity 12. The first sealing compression ring 9 and a convex ring on the inner side of the grease ring 8 cooperatively form a sealing groove, and the installation lip portion 502 of the plurality of sealing members 5 is arranged in the sealing groove along the axial direction of the sealing runway 6 through the plurality of sealing partition rings 10. The sealing compensation mechanism 100 or the sealing compensation mechanism 100' is arranged opposite to the installation lip portion 502 of the sealing member 5. Optionally, the plurality of sealing compensation mechanisms are respectively arranged opposite to the installation lip portions of the corresponding sealing members.

[0073] The above-mentioned only a few embodiments of the present application, those skilled in the art can make various modifications or changes to the embodiments of the present application according to the content disclosed in the application file without departing from the spirit and scope of the present application.

Claims

1. A seal compensation mechanism characterized by, The sealing compensation mechanism comprises: a state monitoring structure (1) for generating a sealing compensation instruction when the sealing state between a sealing member (5) and a matching member (4) is abnormal; a sealing compensation structure (2) movably arranged on the matching member (4); a driving structure (3) for driving the sealing compensation structure (2) to move between the sealing member (5) and the matching member (4) according to the sealing compensation instruction; the sealing compensation structure (2) is movably arranged on the matching member (4) in the axial direction z of the matching member (4), and the sealing compensation structure (2) is located between the sealing member (5) and the driving structure (3) in the axial direction z of the matching member (4); the state monitoring structure (1) comprises a distance monitoring module (101) which is arranged in the axial direction z of the matching member (4) and is spaced apart from the sealing member (5), and the distance monitoring module (101) is used for monitoring the distance between the distance monitoring module (101) and the sealing member (5); the sealing compensation structure (2) comprises a sliding sealing ring (201) which is in sliding fit with the matching member (4) in the axial direction z of the matching member (4) and can slide to the sealing member (5) and the matching member (4) under the driving of the driving structure (3); wherein, when the distance monitoring module (101) monitors that the distance between the distance monitoring module (101) and the sealing member (5) changes by a predetermined threshold, it is determined that the sealing effect is reduced and the sealing compensation instruction is triggered.

2. The sealing compensation mechanism according to claim 1, wherein the state monitoring structure (1) further comprises a control module which is signal connected with the driving structure (3) and the distance monitoring module (101) respectively, and the control module is used for generating the sealing compensation instruction when the distance between the distance monitoring module (101) and the sealing member (5) is lower than a set distance and the distance difference between them is lower than a safety value.

3. The sealing compensation mechanism according to claim 2, wherein the distance monitoring module (101) is signal connected with the control module through a signal line (106), and the matching member (4) is provided with a threading hole (402) for threading the signal line (106).

4. The sealing compensation mechanism according to claim 1, wherein the distance monitoring module (101) is installed on the matching member (4) through a fixing structure (102), and the sealing compensation structure (2) is located between the fixing structure (102) and the matching member (4) in the radial direction x of the matching member (4).

5. The sealing compensation mechanism according to claim 1, wherein one end of the sealing compensation structure (2) close to the sealing member (5) is provided with at least one guide inclined surface (203), and the guide inclined surface (203) is inclined and extended to one side of the matching member (4) from one end away from the sealing member (5) to one end close to the sealing member (5).

6. The sealing compensation mechanism according to claim 5, characterized in that, the sealing compensation structure (2) is provided with a plurality of sealing compensation stepped surfaces (207) at one end close to the sealing element (5), the plurality of sealing compensation stepped surfaces (207) are arranged in a stepped manner and extend along the moving direction of the sealing compensation structure (2), and the number of the guide inclined surfaces (203) is plural, and each of the plurality of guide inclined surfaces (203) is connected to one end of the plurality of sealing compensation stepped surfaces (207) close to the sealing element (5).

7. The sealing compensation mechanism according to claim 1, characterized in that, the sealing compensation structure (2) further comprises a sliding limiting piece (202), the sliding limiting piece (202) is connected to the sliding sealing ring (201), the cooperating element (4) is provided with a limiting sliding groove (403), and the sliding limiting piece (202) can slide along the axial direction z of the cooperating element (4) in the limiting sliding groove (403).

8. The sealing compensation mechanism according to claim 7, characterized in that, the limiting sliding groove (403) is provided with an elastic limiting piece, the sliding limiting piece (202) is limited between the driving structure (3) and the elastic limiting piece; and / or the groove bottom of the limiting sliding groove (403) is provided with a first limiting inclined surface (205), the first limiting inclined surface (205) extends and is arranged from one end away from the sealing element (5) to one end close to the sealing element (5) and inclines to the side close to the sliding limiting piece (202), the sliding limiting piece (202) is provided with a second limiting inclined surface (206), and the second limiting inclined surface (206) can abut against the first limiting inclined surface (205).

9. The sealing compensation mechanism according to claim 1, characterized in that, the driving structure (3) comprises a driving air bag (301), and the driving air bag (301) can push the sealing compensation structure (2) to slide towards the sealing element (5) under the action of inflation and expansion.

10. The sealing compensation mechanism according to claim 9, characterized in that, the cooperating element (4) is provided with a pipe penetrating hole (401), the driving structure (3) further comprises an air pipe (302), the air pipe (302) is arranged in the pipe penetrating hole (401) and communicates with the driving air bag (301).

11. The sealing compensation mechanism according to claim 1, characterized in that, the sealing element (5) is a lip-shaped sealing element, the sealing element (5) has a sealing back surface (503) arranged away from the mounting lip (502), and the sealing compensation structure (2) can slide to the position between the sealing back surface (503) and the cooperating element (4) under the driving of the driving structure (3).

12. A master drive seal apparatus, characterized by, The sealing compensation mechanism (100) according to any one of claims 1-11, the sealing compensation mechanism (100) is installed on the sealing track (6) of the main driving sealing device.

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