Wear monitoring sealing ring structure, forming process and sealing device

Abstract

The invention provides an abrasion monitoring sealing ring structure, a forming process and a sealing device, the abrasion monitoring sealing ring structure comprises a lip-shaped sealing ring, the lip-shaped sealing ring is provided with a base and a lip part which are connected, a transition part is formed between the base and the lip part, and a mounting groove extending to the transition part and the base is formed in the lip part; the flexible circuit board is provided with a first fixed end part, an elastic telescopic part and a second fixed end part which are sequentially connected along the length direction of the flexible circuit board, the flexible circuit board is arranged in the mounting groove, the first fixed end part and the second fixed end part are respectively fixed on the lip part and the base, and the elastic telescopic part corresponds to the transition part; under the state that the angle between the base and the lip part is changed, the elastic telescopic part located on the transition part is stretched or shortened; and the first fixed end part can be worn along with the lip part so as to change a monitoring electric signal formed in the flexible circuit board. According to the invention, the problems of low monitoring precision, weak reliability, difficult installation and poor practicability of the current shield main drive seal can be solved.

Description

Technical Field

[0001] This invention relates to the field of sealing wear monitoring technology, and in particular to a wear monitoring sealing ring structure, molding process and sealing device. Background Technology

[0002] The main drive sealing system is a barrier that isolates the outside world from the main bearing, a key component of the tunnel boring machine. If the sealing system fails during construction, it will cause problems such as external slag entering the main bearing or leakage of gear oil, resulting in damage to the main bearing or gearbox, and in severe cases, paralysis of the shield equipment.

[0003] The failure of the main drive sealing system of a tunnel boring machine is mainly due to excessive wear of the sealing rings. The current monitoring method is mainly an indirect judgment method, which judges the operating status of the sealing system by manually inspecting the leakage of the monitoring cavity. However, this method has a certain lag. When leakage is found during manual inspection, it means that the sealing system has failed as a whole and needs to be replaced urgently. It is impossible to judge the sealing status in advance.

[0004] Those skilled in the art have dedicated themselves to solving the problem of directly measuring the wear of the sealing lip and have designed a variety of sealing wear monitoring devices. Chinese invention patent application No. 202110701149.2 designs a design that installs a contact resistor on the contact interface of the sealing ring. Chinese invention patent application No. 202110941940.0 designs a design that embeds a resistance wire inside the sealing ring. Both of these designs measure the resistance value to obtain the amount of wear through an external measuring circuit. Two invention patent applications with patent application numbers of 202211362017.2 and 202211009306.4 respectively both fix the monitoring device on the wear surface of the sealing ring.

[0005] However, current wear monitoring structures and methods do not consider the compression deformation state of the seal during use. The sensor cannot effectively adapt to this state, and the deformation of the sealing ring can easily damage the measurement circuit on it, resulting in low monitoring accuracy. At the same time, the manufacturing process cannot effectively guarantee the reliability of the wear device during use, and the sensor is easily damaged. Furthermore, the current use of wired power supply and signal transmission does not take into account the structural characteristics and installation space of the tunnel boring machine, and cannot meet the installation and application requirements of the main drive of the tunnel boring machine.

[0006] Therefore, there is an urgent need to design a new type of wear monitoring seal to solve the problems of low monitoring accuracy, weak reliability, difficult installation, and poor practicality of the shield tunnel main drive seal. Summary of the Invention

[0007] The purpose of this invention is to provide a wear monitoring sealing ring structure, molding process, and sealing device to solve the problems of low accuracy, weak reliability, difficult installation, and poor practicality of the current shield tunnel main drive sealing monitoring.

[0008] The above-mentioned technical objectives of the present invention are mainly achieved through the following technical solutions.

[0009] In a first aspect, the present invention provides a wear monitoring sealing ring structure, comprising:

[0010] A lip seal ring having a connected base and a lip, a transition portion being formed between the base and the lip, and a mounting groove extending to the transition portion and the base being provided on the lip;

[0011] A flexible circuit board has a first fixed end, an elastic telescopic part, and a second fixed end connected in sequence along its length. The flexible circuit board is disposed in the mounting groove, and the first fixed end and the second fixed end are respectively fixed to the lip and the base. The elastic telescopic part corresponds to the transition part.

[0012] When the angle between the base and the lip changes, the elastic telescopic portion located on the transition portion extends or shortens; and the first fixed end can wear along with the lip to change the monitoring electrical signal formed in the flexible circuit board.

[0013] In a preferred embodiment of the present invention, the flexible circuit board is a circuit board capable of undergoing bending and stretching deformation.

[0014] In a preferred embodiment of the present invention, the first fixed end and the second fixed end of the flexible circuit board are bonded to the mounting groove by adhesive.

[0015] In a preferred embodiment of the present invention, a protective layer formed by rubber vulcanization is provided in the mounting groove, and the protective layer fixes the first fixed end and the second fixed end of the flexible circuit board in the mounting groove.

[0016] In a preferred embodiment of the present invention, the flexible circuit board has a plurality of through holes.

[0017] In a preferred embodiment of the present invention, the flexible circuit board is continuously bent to form a plurality of folds at the position corresponding to the transition portion, and the plurality of folds form the elastic expansion portion.

[0018] In a preferred embodiment of the present invention, the base is further provided with a receiving groove communicating with the mounting groove, and a wear monitoring device electrically connected to the flexible circuit board is fixed in the receiving groove.

[0019] In a preferred embodiment of the present invention, the wear monitoring device has a wireless communication module and a signal processing module. The signal processing module is capable of receiving the monitoring electrical signal generated in the flexible circuit board and transmitting the monitoring electrical signal to the wireless communication module for radio transmission.

[0020] In a preferred embodiment of the present invention, the receiving groove is further provided with a power supply electrically connected to the wear monitoring device.

[0021] In a preferred embodiment of the present invention, both the wear monitoring device and the power supply are bonded to the receiving groove with flexible adhesive.

[0022] In a preferred embodiment of the present invention, the lip has a back surface, the base has a connected top surface and a side surface, the transition portion has a transition surface, and the back surface, the transition surface, the side surface and the top surface are connected in sequence.

[0023] The mounting groove is continuously formed on the back surface, the transition surface, the side surface, and the top surface;

[0024] The receiving groove is formed on the top surface.

[0025] Secondly, the present invention also provides a molding process for a wear monitoring sealing ring, the molding process being used to manufacture the wear monitoring sealing ring structure as described above, the molding process comprising the following steps:

[0026] Step S1: The lip seal ring with the mounting groove is integrally formed by a sealing mold, or the mounting groove is machined on the formed lip seal ring, the mounting groove extending from the lip of the lip seal ring to the base;

[0027] Step S2: The two ends of the flexible circuit board with the elastic telescopic part in the middle are pre-fixed with glue to the mounting groove on the base and the mounting groove on the lip, respectively;

[0028] Step S3: Apply rubber sealing strips to the mounting groove on the base and the mounting groove on the lip respectively;

[0029] Step S4: Place the lip seal ring into the corresponding tooling mold for vulcanization and fixation, and vulcanize and wrap the rubber sealing strip around both ends of the flexible circuit board.

[0030] In a preferred embodiment of the present invention, the following steps are further included:

[0031] While forming the mounting groove, a receiving groove is formed on the base, and the receiving groove is connected to the mounting groove;

[0032] After the flexible circuit board is pre-fixed, the wear monitoring device with a built-in wireless communication module is connected to the flexible circuit board and placed in the receiving slot. The power supply is connected to the wear monitoring device and placed in the receiving slot. Then, glue is poured into the receiving slot to fix the wear monitoring device and the power supply.

[0033] Thirdly, the present invention also provides a sealing device comprising:

[0034] A fixed component and a moving component, wherein a gap is formed between the fixed component and the moving component;

[0035] At least one lip seal is provided within the gap, the lip seal being a wear monitoring seal structure as described above, the base of the lip seal being fixed to the fixing member, and the lip of the lip seal being in sealing contact with the moving part.

[0036] In a preferred embodiment of the present invention, a wireless communication module connected to the flexible circuit board is integrated on the lip seal ring; a receiving module is integrated on the fixing member or the moving member, and a wireless communication connection can be established between the wireless communication module and the receiving module.

[0037] In a preferred embodiment of the present invention, the fixing member is a grease ring and the moving member is a sealed running track.

[0038] In a preferred embodiment of the present invention, a plurality of lip-shaped sealing rings are provided between the grease ring and the sealing track. The plurality of lip-shaped sealing rings are spaced apart along the axial direction of the grease ring. A spacer ring is provided between each pair of adjacent lip-shaped sealing rings. A pressure ring is installed and fixed at the end of the grease ring, and the pressure ring abuts against the lip-shaped sealing ring.

[0039] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0040] The wear monitoring sealing ring structure of the present invention corresponds to the waist (transition part) of the lip seal ring where the force is greater. The flexible circuit board forms an elastic expansion part through "folds". The flexible circuit board and the lip seal ring in the transition part area are not bonded. When the waist of the lip seal ring is subjected to tensile force, the flexible circuit board can further compensate for the length change in the tensile direction through "folds", thereby preventing the wires in the flexible circuit board from being pulled off.

[0041] The wear monitoring sealing ring structure described in this invention addresses the extremely low adhesion characteristics of flexible circuit boards to other materials, making it difficult for them to bond firmly with lip seals. By providing through holes in the flexible circuit board, the adhesion between the flexible circuit board and the adhesive / rubber seal is increased, thereby improving the firmness of the flexible circuit board in the mounting groove.

[0042] The wear monitoring sealing ring structure described in this invention integrates a flexible circuit board and a wireless communication module on the lip sealing ring, which can accurately measure the wear of the sealing ring lip online and transmit the signal wirelessly, thus solving the problems of inaccurate sealing wear monitoring, unreliable protection, and difficult installation and application. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0044] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0045] Figure 1 This is a schematic diagram of the mounting groove and receiving groove on the lip seal ring of the present invention;

[0046] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the middle;

[0047] Figure 3 This is a schematic diagram of the flexible circuit board of the present invention placed in the mounting groove;

[0048] Figure 4 This is a schematic diagram of the structure of the flexible circuit board described in this invention;

[0049] Figure 5 This is a schematic diagram of the installation structure of the rubber sealing strip described in this invention;

[0050] Figure 6 This is a schematic diagram of the integrated monitoring structure of the lip seal ring described in this invention;

[0051] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure in the middle;

[0052] Figure 8 This is a cross-sectional view of the sealing device described in this invention;

[0053] Figure 9 for Figure 8 A schematic diagram of a local structure.

[0054] Explanation of reference numerals in the attached figures:

[0055] 100. Lip seal; 110. Base; 111. Top surface; 112. Side surface; 120. Lip; 121. Back surface; 130. Transition section; 131. Transition surface; 140. Mounting groove; 150. Receiving groove;

[0056] 200. Flexible circuit board; 201. First fixed end; 202. Elastic telescopic part; 203. Second fixed end; 204. Through hole;

[0057] 300. Rubber sealing strip; 301. Protective layer;

[0058] 400. Wear monitoring device; 401. Power supply;

[0059] 500. Fixing component; 501. Moving component; 502. Spacer ring; 503. Pressure ring; 504. Receiving module. Detailed Implementation

[0060] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0061] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0063] Implementation Method 1:

[0064] This invention provides a wear monitoring sealing ring structure, such as... Figures 1 to 7 As shown, it includes a lip seal 100 and a flexible circuit board 200 disposed on the lip seal 100. The lip seal 100 has a connected base 110 and a lip 120, with a transition portion 130 formed between the base 110 and the lip 120. A mounting groove 140 extending from the lip 120 to the transition portion 130 and the base 110 is provided on the lip 120. Along the length of the flexible circuit board 200, it has a first fixed end 201, an elastic telescopic portion 202, and a second fixed end 203 connected in sequence. The flexible circuit board 200 is disposed within the mounting groove 140, and the first fixed end 201 and the second fixed end 203 are respectively fixed to the lip 120 and the base 110. The elastic telescopic portion 202 corresponds to the transition portion 130. When the angle between the base 110 and the lip 120 changes, the elastic telescopic portion 202 located on the transition portion 130 extends or shortens. The first fixed end 201 can wear along with the lip 120 to change the monitoring electrical signal formed within the flexible circuit board 200.

[0065] The wear monitoring sealing ring structure of the present invention has an elastic expansion portion 202 formed on the waist (transition portion 130) of the lip seal 100 where the force is greater. The flexible circuit board 200 and the lip seal 100 are not bonded to each other in the transition portion 130 area. When the waist of the lip seal 100 is subjected to tensile force, the flexible circuit board 200 can compensate for the change in length in the tensile direction through the elastic expansion portion 202, thereby preventing the wires in the flexible circuit board 200 from being pulled apart.

[0066] The following section will provide a detailed description of the specific structure of each part of the wear monitoring sealing ring structure described in this invention, as well as the position and connection relationship between each part.

[0067] The wear monitoring sealing ring structure of the present invention has a lip seal 100, such as Figure 1 and Figure 2 As shown, the lip seal 100 is typically annular and is used to seal and separate annular gaps. To better illustrate the structure of the lip seal 100, Figure 1 The lip seal 100 shown is in its unfolded shape.

[0068] like Figure 1 and Figure 2As shown, the lip seal 100 has a connected base 110 and a lip 120. The base 110 is used to fix the lip seal 100, and the lip 120 is used to form a contact seal. To achieve flexible adjustment of the seal, the base 110 and the lip 120 are typically made of elastic rubber, and a transition portion 130 (neck) is formed between the base 110 and the lip 120, so that the lip 120 can rotate relative to the base 110 through the transition portion 130.

[0069] Furthermore, the lip seal 100 has a mounting groove 140 for mounting the flexible circuit board 200 for sealing monitoring. Specifically, as shown... Figure 1 and Figure 2 As shown, the lip 120 has a back surface 121, the base 110 has a connected top surface 111 and a side surface 112, the transition portion 130 has a transition surface 131, the back surface 121, the transition surface 131, the side surface 112 and the top surface 111 are connected in sequence, and the mounting groove 140 is continuously formed on the back surface 121, the transition surface 131, the side surface 112 and the top surface 111; that is, the mounting groove 140 is formed on the surface of one side of the lip seal ring 100, the bottom end of the mounting groove 140 is located at the bottom end of the lip 120, and the other end of the mounting groove 140 extends along the surface of the lip seal ring 100 to the top surface 111 of the base 110.

[0070] The wear monitoring sealing ring structure of the present invention also has a flexible circuit board 200, and the flexible circuit board 200 is installed in the mounting groove 140 on the lip seal ring 100. The flexible circuit board 200 is a circuit board capable of bending and stretching deformation. Since the mounting groove 140 is not planar, the flexible circuit board 200 with bending deformation capability can fit into the extension direction of the groove, so that the flexible circuit board 200 can be completely placed in the mounting groove 140. Since the entire lip seal 100 is made of elastic material, it will undergo local deformation during operation. Therefore, after the flexible circuit board 200 with stretching deformation capability is fixed in the mounting groove 140, it can be compressed or stretched together with the lip seal 100. That is, the flexible circuit board 200 can adapt to the deformation of the lip seal 100, thereby preventing the flexible circuit board 200 from falling out of the mounting groove 140 and preventing the flexible circuit board 200 from moving around in the mounting groove 140. The position of the flexible circuit board 200 relative to the lip seal 100 remains fixed, thereby accurately reflecting the wear of the seal.

[0071] like Figure 4 , Figure 7 and Figure 9As shown, along the length of the flexible circuit board 200, it has a first fixed end 201, an elastic telescopic part 202, and a second fixed end 203 connected in sequence. The first fixed end 201 is placed in the mounting groove 140 on the lip 120 and fixed, the second fixed end 203 is placed in the mounting groove 140 on the base 110 and fixed, and the elastic telescopic part 202 in the middle is placed in the mounting groove 140 on the transition part 130 and is not fixed. The elastic telescopic part 202 has a relatively large telescopic capacity. When the angle between the lip 120 and the base 110 changes, the position of the transition part 130 will undergo a large elastic deformation. If the flexible circuit board 200 is also fixed in the mounting groove 140 at the position of the transition part 130, the elastic deformation capacity of the flexible circuit board 200 and itself cannot meet the shearing and peeling generated at this position. Therefore, in the mounting groove 140 at the transition part 130, the flexible circuit board 200 is only accommodated in the mounting groove 140 and is not fixed. Since both ends of the flexible circuit board 200 are fixed, the unfixed section of the elastic telescopic part 202 in the middle will not significantly affect the installation strength of the flexible circuit board 200.

[0072] Meanwhile, the flexible circuit board 200 has an elastic telescopic structure at the transition portion 130. In this embodiment, for example... Figure 9 As shown, the flexible circuit board 200 is continuously bent to form several folds at the position corresponding to the transition part 130, and the several folds form an elastic expansion part 202 that has the function of compensating for the stretching or compression of the flexible circuit board 200 along the length direction.

[0073] Furthermore, such as Figure 4 As shown, the flexible circuit board 200 has a built-in monitoring circuit. The first fixed end 201 of the flexible circuit board 200 can wear along with the lip 120. The wear of the flexible circuit board 200 will damage the monitoring circuit, thereby changing the monitoring electrical signal formed in the flexible circuit board 200, and thus realizing the monitoring of the wear of the lip 120.

[0074] Specifically, the monitoring circuit within the flexible circuit board 200 can adopt the monitoring circuit disclosed in application number 202211009306.4, entitled "Sealing Wear Monitoring Device and Method Thereof". The specific monitoring circuit includes a main circuit and multiple branch circuits. The branch circuits are connected in parallel and then in series with the main circuit. Resistive elements are installed on each branch circuit, and a current detection element is installed on the main circuit. The current detection element can collect the current value on the main circuit in real time. When one or more branch circuits are disconnected due to wear, the total resistance value of the parallel connection of the branch circuits will change, and thus the current value collected by the current detection element will also change accordingly. Therefore, the wear of the lip seal 100 can be monitored in real time based on the change in the current value on the main circuit.

[0075] The following will further explain the structure and technical effects of the preferred embodiment of the wear monitoring sealing ring structure of the present invention.

[0076] According to one embodiment of the present invention, such as Figure 7 and Figure 9 As shown, the first fixed end 201 and the second fixed end 203 of the flexible circuit board 200 are bonded to the mounting groove 140 with adhesive.

[0077] Furthermore, such as Figure 7 and Figure 9 As shown, a protective layer 301 formed by rubber vulcanization is provided in the mounting groove 140. The protective layer 301 fixes the first fixed end 201 and the second fixed end 203 of the flexible circuit board 200 in the mounting groove 140. The rubber sealing strip 300 is wrapped around the back of the flexible circuit board 200 through the vulcanization process to form the protective layer 301, thereby protecting the flexible circuit board 200.

[0078] According to one embodiment of the present invention, such as Figure 4 As shown, the flexible circuit board 200 has multiple through holes 204. The through holes 204 on the flexible circuit board 200 increase the adhesion between the flexible circuit board 200 and the protective layer 301 formed by the rubber seal. Due to the extremely low adhesion characteristics of the flexible circuit board 200 to other materials, it is not easy to bond firmly to the lip seal ring 100. This invention uses a method of locally drilling holes in the flexible circuit board 200, resulting in a more secure and reliable bond.

[0079] According to one embodiment of the present invention, such as Figures 1 to 3 , Figures 5 to 7 As shown, the base 110 is also provided with a receiving groove 150 that communicates with the mounting groove 140. The receiving groove 150 is provided on the top surface 111 of the base 110. A wear monitoring device 400 that is electrically connected to the flexible circuit board 200 is fixed in the receiving groove 150.

[0080] Specifically, the wear monitoring device 400 has a wireless communication module and a signal processing module. The signal processing module can receive the monitoring electrical signals generated within the flexible circuit board 200 and transmit them to the wireless communication module for wireless transmission. The lip seal 100 integrates the flexible circuit board 200 and the wireless communication module, enabling precise online measurement of the wear amount of the seal lip 120 and wireless transmission of the signals, thus solving the problem of difficult installation and application of seal wear monitoring.

[0081] Furthermore, such as Figure 5 and Figure 6As shown, the receiving slot 150 is also equipped with a power supply 401 that is electrically connected to the wear monitoring device 400. The power supply 401 is used to supply power to the wear monitoring device 400. The power supply 401 can be a button battery or a polymer lithium battery; to increase the power capacity, multiple batteries can be connected in parallel.

[0082] According to one embodiment of the present invention, both the wear monitoring device 400 and the power supply 401 are bonded to the receiving groove 150 with flexible adhesive. Flexible adhesive can be poured into the receiving groove 150 to encapsulate and fix the wear monitoring device 400 and the power supply 401, thereby improving protection.

[0083] Implementation Method Two:

[0084] This invention also provides a process for forming a wear monitoring sealing ring, used to manufacture the wear monitoring sealing ring structure as described in Embodiment 1, such as... Figures 1 to 7 As shown, the molding process includes the following steps:

[0085] Step S1: The lip seal ring 100 with the mounting groove 140 is integrally formed by the sealing mold, or the mounting groove 140 is machined on the formed lip seal ring 100, and the mounting groove 140 extends from the lip 120 of the lip seal ring 100 to the base 110.

[0086] Step S2: The two ends of the flexible circuit board 200 with the elastic telescopic part 202 in the middle are pre-fixed with glue into the mounting groove 140 on the base 110 and the mounting groove 140 of the lip 120 respectively.

[0087] Step S3: A rubber sealing strip 300 is attached to the mounting groove 140 on the base 110 and the mounting groove 140 on the lip 120 respectively;

[0088] Step S4: Place the lip seal 100 into the corresponding tooling mold for vulcanization and fixation, and vulcanize and wrap the rubber sealing strip 300 around both ends of the flexible circuit board 200.

[0089] like Figure 1 As shown, in step S1, a lip seal 100 is manufactured and an installation groove 140 is formed on it. The installation groove 140 can be integrally formed during the molding of the lip seal 100 by designing a special mold, thereby avoiding the impact of the subsequent opening of the installation groove 140 on the lip seal 100. Alternatively, the lip seal 100 can be molded first, and then the installation groove 140 can be opened on the lip seal 100.

[0090] like Figure 3 , Figure 7 and Figure 9As shown, in step S2, the flexible circuit board 200 is pre-fixed in the mounting groove 140 with adhesive (such as silicone). The first fixing end 201 is bonded to the mounting groove 140 on the lip 120 with silicone, and the second fixing end 203 is bonded to the mounting groove 140 on the base 110 with silicone. The elastic telescopic part 202 between the first fixing end 201 and the second fixing end 203 is placed in the mounting groove 140 on the transition part 130 and is not fixed with silicone.

[0091] like Figure 5 As shown, in step S3, the rubber sealing strip 300 is coated with adhesive and attached to the outside of the flexible circuit board 200 on the back of the lip seal ring 100. The first fixed end 201 and the second fixed end 203 of the lip seal ring 100 are respectively attached with a section of rubber sealing strip 300, and the rubber sealing strip 300 can be placed in the corresponding mounting groove 140.

[0092] like Figure 6 and Figure 7 As shown, in step S4, the lip seal 100 on which the flexible circuit board 200 is installed is placed in the vulcanizing apparatus, pressurized and heated for a period of time, so that the rubber sealing strip 300 forms a cloth-reinforced rubber wrapping around the outside of the flexible circuit board 200.

[0093] According to one embodiment of the present invention, such as Figure 1 As shown, in step S1, while forming the mounting groove 140, a receiving groove 150 is also formed on the base 110, and the receiving groove 150 is connected to the mounting groove 140; as Figure 3 As shown, after the vulcanization and fixing of the rubber sealing strip 300 is completed, that is, between steps S2 and S3, the wear monitoring device 400 with a built-in wireless communication module is connected to the flexible circuit board 200 and placed in the receiving groove 150. The power supply 401 is connected to the wear monitoring device 400 and placed in the receiving groove 150. Then, glue is poured into the receiving groove 150 to fix the wear monitoring device 400 and the power supply 401. The glue pouring method can avoid the high temperature of vulcanization in step S4 from damaging the wear monitoring device 400 and the power supply 401.

[0094] Implementation Method 3:

[0095] The present invention also provides a sealing device, such as Figure 8 and Figure 9 As shown, it includes: a fixed member 500 and a moving member 501, with a gap formed between the fixed member 500 and the moving member 501; at least one lip seal 100 disposed in the gap, the lip seal 100 being a wear monitoring seal structure as described in one embodiment, the base 110 of the lip seal 100 being fixed to the fixed member 500, and the lip 120 of the lip seal 100 being in sealing contact with the moving member 501.

[0096] Specifically, the fixed component 500 is a grease ring, and the moving component 501 is a sealed track. An annular gap is formed between the grease ring and the sealed track. Multiple lip seals 100 are provided within this annular gap, and the multiple lip seals 100 are spaced apart along the axial direction of the grease ring. A spacer ring 502 is provided between each pair of adjacent lip seals 100. A pressure ring 503 is installed and fixed at the end of the grease ring, and the pressure ring 503 abuts against the lip seals 100. A wireless communication module connected to the flexible circuit board 200 is integrated on the lip seal 100; a receiving module 504 is integrated on the moving component 501, and a wireless communication connection can be established between the wireless communication module and the receiving module 504.

[0097] The wear monitoring mechanism for the sealing device operates as follows:

[0098] The lip 120 of the lip seal 100 rotates relative to the sealing track. Under continuous friction, the lip 120 of the lip seal 100 wears down, causing wear on the flexible circuit board 200 inside the lip seal 100. After the flexible circuit board 200 wears down, some of its branch lines will break down, causing a change in the total resistance value in the monitoring circuit. As wear continues, the total resistance value will also change, and the signal will be transmitted to the wireless communication module. The power supply 401 supplies power to the wireless communication module and periodically transmits the wireless signal. After receiving the signal, the receiving module 504 transmits the signal to the back-end device for display and processing via a wired connection.

[0099] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wear monitoring sealing ring structure, characterized in that, include: A lip seal (100) has a connected base (110) and a lip (120), a transition portion (130) is formed between the base (110) and the lip (120), and a mounting groove (140) extending to the transition portion (130) and the base (110) is provided on the lip (120). A flexible circuit board (200) is disposed in the mounting groove (140) and has a first fixed end (201), an elastic telescopic part (202) and a second fixed end (203) connected in sequence along the length direction of the flexible circuit board (200). The first fixed end (201) is fixed in the mounting groove (140) on the lip (120), and the end of the first fixed end (201) extends to the lip opening at the end of the lip (120); the second fixed end (203) is fixed in the mounting groove (140) on the base (110); the elastic telescopic part (202) is received in the mounting groove (140) on the transition part (130), and the elastic telescopic part (202) is used to extend or shorten as the angle between the base (110) and the lip (120) changes.

2. The wear monitoring sealing ring structure according to claim 1, characterized in that, The flexible circuit board (200) is a circuit board capable of bending and stretching deformation.

3. The wear monitoring sealing ring structure according to claim 1, characterized in that, The first fixed end (201) and the second fixed end (203) of the flexible circuit board (200) are glued to the mounting groove (140).

4. The wear monitoring sealing ring structure according to claim 3, characterized in that, The mounting groove (140) is provided with a protective layer (301) formed by rubber vulcanization bonding. The protective layer (301) fixes the first fixed end (201) and the second fixed end (203) of the flexible circuit board (200) in the mounting groove (140).

5. The wear monitoring sealing ring structure according to claim 3 or 4, characterized in that, The flexible circuit board (200) has multiple through holes (204).

6. The wear monitoring sealing ring structure according to claim 1, characterized in that, The flexible circuit board (200) is continuously bent to form several folds corresponding to the transition part (130), and the several folds form the elastic expansion part (202).

7. The wear monitoring sealing ring structure according to claim 1, characterized in that, The base (110) is also provided with a receiving groove (150) that communicates with the mounting groove (140), and a wear monitoring device (400) that is electrically connected to the flexible circuit board (200) is fixed in the receiving groove (150).

8. The wear monitoring sealing ring structure according to claim 7, characterized in that, The wear monitoring device (400) has a wireless communication module and a signal processing module. The signal processing module can receive the monitoring electrical signal generated in the flexible circuit board (200) and transmit the monitoring electrical signal to the wireless communication module.

9. The wear monitoring sealing ring structure according to claim 7 or 8, characterized in that, The receiving slot (150) is also equipped with a power supply (401) that is electrically connected to the wear monitoring device (400).

10. The wear monitoring sealing ring structure according to claim 9, characterized in that, The wear monitoring device (400) and the power supply (401) are both bonded to the receiving groove (150) with flexible adhesive.

11. The wear monitoring sealing ring structure according to claim 7, characterized in that, The lip (120) has a back surface (121), the base (110) has a connected top surface (111) and a side surface (112), the transition portion (130) has a transition surface (131), and the back surface (121), the transition surface (131), the side surface (112) and the top surface (111) are connected in sequence; The mounting groove (140) is continuously formed on the back surface (121), the transition surface (131), the side surface (112) and the top surface (111); The receiving groove (150) is formed on the top surface (111).

12. A process for forming a wear monitoring sealing ring, characterized in that, The molding process is used to manufacture the wear monitoring sealing ring structure as described in any one of claims 1-11, and the molding process includes: The lip seal (100) with the mounting groove (140) is integrally formed by a sealing mold, or the mounting groove (140) is machined on the formed lip seal (100), the mounting groove (140) extending from the lip (120) of the lip seal (100) to the base (110). The two ends of the flexible circuit board (200) with the elastic telescopic part (202) formed in the middle are respectively pre-fixed with glue into the mounting groove (140) on the base (110) and the mounting groove (140) on the lip (120); Rubber sealing strips (300) are respectively attached to the mounting groove (140) on the base (110) and the mounting groove (140) on the lip (120). The lip seal (100) is placed in the corresponding tooling mold for vulcanization and fixation, and the rubber sealing strip (300) is vulcanized and wrapped around both ends of the flexible circuit board (200).

13. The wear monitoring sealing ring forming process according to claim 12, characterized in that, Also includes: While forming the mounting groove (140), a receiving groove (150) is formed on the base (110), and the receiving groove (150) is connected to the mounting groove (140); After the flexible circuit board (200) is pre-fixed, the wear monitoring device (400) with a built-in wireless communication module is connected to the flexible circuit board (200) and placed in the receiving groove (150). The power supply (401) is connected to the wear monitoring device (400) and placed in the receiving groove (150). Then, glue is poured into the receiving groove (150) to fix the wear monitoring device (400) and the power supply (401).

14. A sealing device, characterized in that, include: A fixing member (500) and a moving member (501) are provided, and a gap is formed between the fixing member (500) and the moving member (501); At least one lip seal (100) is provided in the gap, the lip seal (100) is the wear monitoring seal structure according to any one of claims 1-11, the base (110) of the lip seal (100) is fixed to the fixing member (500), and the lip (120) of the lip seal (100) is in sealing contact with the moving member (501).

15. The sealing device according to claim 14, characterized in that, The lip seal (100) integrates a wireless communication module connected to the flexible circuit board (200); the fixing member (500) or the moving member (501) integrates a receiving module (504), and the wireless communication module and the receiving module (504) are wirelessly connected.

16. The sealing device according to claim 14 or 15, characterized in that, The fixing component (500) is a grease ring, and the moving component (501) is a sealed runway.

17. The sealing device according to claim 16, characterized in that, Multiple lip seals (100) are provided between the grease ring and the sealing track. The multiple lip seals (100) are spaced apart along the axial direction of the grease ring. A spacer (502) is provided between each pair of adjacent lip seals (100). A pressure ring (503) is installed and fixed at the end of the grease ring, and the pressure ring (503) abuts against the lip seals (100).

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