Combined high-stability titanium carbonitride hard alloy seal ring

Abstract

The application discloses a combined high-stability titanium carbonitride hard alloy sealing ring applied to the field of hard alloy sealing rings, and relates to the technical field of sealing rings, in particular to a combined high-stability titanium carbonitride hard alloy sealing ring applied to the field of hard alloy sealing rings. In the use environment of water-soluble or emulsified lubricating liquid, a plurality of sacrificial anode units are arranged on the inner ring seat to establish an electrochemical anticorrosion system, a protective anode is formed by using an anode main body, the inner ring seat is protected in the use environment of water-soluble or emulsified lubricating liquid, an anode is formed by the anode main body in the electrochemical cell system composed of the inner ring seat, the anode main body and the water-soluble or emulsified lubricating liquid, the inner ring seat is corroded instead of the inner ring seat to protect the inner ring seat, a detection unit is additionally arranged in the anode main body to monitor the corrosion condition of the anode main body, a warning is sent in time when the anode main body is excessively corroded, technicians are reminded to replace the anode main body in time, the inner ring seat is protected, and the structure of the combined sealing ring is not prone to failure.

Description

Technical Field

[0001] This invention relates to the field of cemented carbide sealing rings, and particularly to a composite high-stability titanium carbonitride cemented carbide sealing ring. Background Technology

[0002] The composite high-hardness metal sealing ring significantly improves sealing performance and service life thanks to its unique composite structure design and the synergistic effect of high-hardness materials: the high-hardness end face, made of hard alloy or surface-hardened, can withstand extremely high pressure and wear, making it suitable for harsh working conditions; the split assembly form allows each component to be adjusted independently, effectively compensating for thermal deformation, mechanical vibration and installation errors, thereby maintaining a stable seal during high-speed rotation or reciprocating motion, while the multi-layer structure enhances the resistance to extrusion and prevents seal failure.

[0003] The invention patent with announcement number CN101642776B discloses a cemented carbide composite roll, in which the cemented carbide ring on the outer working surface has the superior wear resistance of tungsten carbide or other superhard materials, while the roll shaft and accessories with high toughness alloy structural steel can avoid roll ring breakage accidents, and the cemented carbide composite roll greatly reduces costs.

[0004] Although the specific structure of combined rolls differs from that of metal seals, the principle of achieving high wear resistance and high toughness through the combination of different materials is the same. Therefore, cemented carbide sealing rings can maintain hardness while increasing toughness through the same combination method as combined rolls. However, high-hardness metal sealing rings are usually used in high-end machine tools and other environments. In high-end machine tools, water-soluble or emulsion-type lubricants are used. These lubricants form an electrolyte. Combined sealing rings made of different materials are prone to electrochemical corrosion under the action of the lubricant, causing the sealing ring structure to fail. Summary of the Invention

[0005] The core of this invention lies in establishing an electrochemical corrosion protection system by setting multiple sacrificial anode units on the inner ring seat, and using the anode body to form a protective anode, which protects the inner ring seat in the environment of water-soluble or emulsion-type lubricating fluid, making the sealing ring structure less prone to failure.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A composite high-stability titanium carbonitride hard alloy sealing ring includes a matching titanium carbonitride ring and an inner ring seat. The inner ring seat is inserted into the titanium carbonitride ring. The titanium carbonitride ring includes a sealing ring body with a stepped groove inside. Multiple axial grooves are formed on the outer wall of the sealing ring body, and a connecting hole is formed between each of the multiple axial grooves and the annular groove. The inner ring seat includes a seat body with a stepped protrusion at the lower end that matches the stepped groove. An anode groove is formed on the part of the seat body away from the stepped protrusion. A contact post is fixedly connected to the bottom plate of the anode groove. Side through holes are formed on the side walls of the multiple anode grooves, and the side through holes connect the anode grooves to the outside. The positions of the multiple side through holes match the positions of the multiple connecting holes. A sacrificial anode unit is inserted into the anode groove. The sacrificial anode unit includes an insulating shell, which is threaded to the anode groove. A matching fixed wing is slidably connected inside the insulating shell. The anode body is fixedly connected inside the fixed wing. A fan-shaped hole is opened on the fixed wing, and a matching screen is fixedly connected inside the fan-shaped hole. Multiple axial grooves are opened on the side wall of the insulating shell, and multiple exchange holes are opened at one end of the insulating shell. By setting multiple sacrificial anode units on the inner ring seat, the inner ring seat is protected, making it less prone to electrochemical corrosion in water-soluble or emulsion-type lubricating fluid environments.

[0008] Furthermore, a tension spring is fixedly connected to the fixed wing and the inner wall of the insulating shell, and the tension spring and the anode body are respectively located on both sides of the fixed wing. A limiting ring that matches the position of the screen is fixedly connected to the inner wall of the insulating shell, and the inner wall of the limiting ring is located inside multiple screens, which makes it convenient for technicians to inject the corresponding lubricant in advance. The lubricant is not easy to leak during subsequent transportation and installation, which facilitates the early production and storage of the sacrificial anode unit.

[0009] Furthermore, an annular groove 1 is provided on the side wall of the stepped groove, and an annular groove 2 is provided on the outer wall of the insulating shell. The diameters of the annular groove 1, the connecting hole, the axial groove 1, the side through hole, the exchange hole, the axial groove 2, and the annular groove 2 are the same. The opening of the annular groove 1 and the annular groove 2 can increase the flow path of lubricant on the titanium carbonitride ring and the sacrificial anode unit. Even if it is partially blocked by foreign objects, the lubricant can still be kept flowing.

[0010] Furthermore, the diameter of the screen openings is smaller than the diameter of the exchange holes, which prevents larger particles caused by partial detachment of the anode body from flowing out of the insulating shell and is less likely to cause blockage of the lubricant channels such as the exchange holes.

[0011] Furthermore, threaded grooves are formed on the sidewalls of the insulating housing, located on the side of the insulating housing away from the exchange hole. A hexagonal countersunk groove is formed at the end of the insulating housing away from the exchange hole. The sacrificial anode unit is detachably fixed to the anode groove through the threaded grooves, which facilitates the installation and replacement of the sacrificial anode unit and makes it easier to maintain the titanium carbonitride ring and inner ring seat. Meanwhile, a detection chamber is provided inside the anode body, located on the side of the anode body near the fixed wing. A detection unit is embedded inside the anode body, and electrode one and electrode two are fixedly connected to the detection unit. The ends of electrode one and electrode two away from the detection unit extend into the detection chamber. An indicator light is fixedly connected to the insulating shell, and the indicator light is electrically connected to the detection unit. When the anode body is corroded and the detection chamber is exposed, the control terminal sends an excessive corrosion signal to the external receiver and the indicator light. The external receiver reminds the technicians to replace it in time. When the technicians disassemble and replace it, the lit indicator light can identify the sacrificial anode unit that needs to be replaced during disassembly.

[0012] Furthermore, a partition plate is fixedly connected inside the detection chamber, which separates electrode one and electrode two into two isolated spaces to prevent voltage breakdown between electrode one and electrode two, making it less likely for the current sensor to falsely detect detection data and to issue false alarms.

[0013] Furthermore, the partition plate is provided with connection holes, which are offset from electrode one and electrode two. When there is excessive local corrosion in the anode body and the detection chamber is partially exposed, the lubricating fluid can flow into the adjacent isolated space through the connection holes, and the excessive corrosion signal can be sent in time.

[0014] Compared with the prior art, the advantages of this invention are: This solution establishes an electrochemical corrosion protection system in environments using water-soluble or emulsified lubricants by setting multiple sacrificial anode units on the inner ring seat. The anode body forms a protective anode, protecting the inner ring seat in water-soluble or emulsified lubricant environments. In the electrochemical cell system composed of the inner ring seat, anode body, and water-soluble or emulsified lubricant, the anode body forms the anode, replacing the inner ring seat in corrosion and protecting it, making the combined sealing ring structure less prone to failure.

[0015] Meanwhile, a detection unit, electrode one, and electrode two are added inside the anode body to monitor the corrosion status of the anode body. When excessive corrosion occurs in the anode body, an early warning is issued in time to remind technicians to replace it in time and protect the inner ring seat, so that the structure of the combined sealing ring is not easy to fail. Attached Figure Description

[0016] Figure 1 This is an exploded view of the main structure of the combined cemented carbide sealing ring of the present invention; Figure 2 This is a schematic diagram of the combined hard alloy sealing ring of the present invention; Figure 3 This is a side sectional view of the combined cemented carbide sealing ring of the present invention; Figure 4 This is a schematic diagram of the structure of the titanium carbonitride ring of the present invention; Figure 5 This is a cross-sectional view of the titanium carbonitride ring of the present invention; Figure 6 This is a schematic diagram of the inner ring seat of the present invention; Figure 7 This is a cross-sectional view of the inner ring seat of the present invention; Figure 8 This is a schematic diagram of the sacrificial anode unit in the first embodiment; Figure 9 This is a cross-sectional view of the sacrificial anode unit in the first embodiment; Figure 10 This is a schematic diagram of the sacrificial anode unit in the second embodiment; Figure 11 This is a cross-sectional view of the sacrificial anode unit in the second embodiment.

[0017] Explanation of the labels in the diagram: 1. Titanium carbonitride ring, 101. Sealing ring body, 102. Annular groove one, 103. Connecting hole, 104. Axial groove one, 2. Inner ring seat, 201. Ring seat body, 202. Anode groove, 203. Side through hole, 204. Contact pile, 3. Sacrificial anode unit, 301. Insulating shell, 302. Anode body, 303. Tension spring, 304. Fixed wing, 305. Screen, 306. Limiting ring, 307. Exchange hole, 308. Axial groove two, 309. Annular groove two, 310. Hexagonal countersunk groove, 311. Indicator light, 312. Detection chamber, 313. Partition plate, 314. Connecting hole, 4. Detection unit, 5. Electrode one, 6. Electrode two. Detailed Implementation

[0018] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0019] First implementation method: Please see Figure 1 - Figure 7A composite high-stability titanium carbonitride hard alloy sealing ring includes a matching titanium carbonitride ring 1 and an inner ring seat 2. The inner ring seat 2 is inserted into the titanium carbonitride ring 1. The titanium carbonitride ring 1 includes a sealing ring body 101, with a stepped groove inside. Multiple axial grooves 104 are formed on the outer wall of the sealing ring body 101, and connecting holes 103 are formed between each of the multiple axial grooves 104 and the annular grooves 102. The inner ring seat 2 includes a seat body 201. The lower end is provided with a stepped protrusion that matches the stepped groove. The part of the ring seat body 201 away from the stepped protrusion is provided with an anode groove 202. A contact pile 204 is fixedly connected to the bottom plate of the anode groove 202. Side through holes 203 are provided on the side walls of multiple anode grooves 202. The side through holes 203 connect the anode groove 202 to the outside. The positions of multiple side through holes 203 match the positions of multiple connecting holes 103 respectively. The connecting holes 103, side through holes 203 and anode grooves 202 are connected. Please see Figure 3 and Figures 8-10 A sacrificial anode unit 3 is inserted into the anode groove 202. The sacrificial anode unit 3 includes an insulating shell 301, and the insulating shell 301 is threadedly connected to the anode groove 202. A fixed wing 304 matching itself is slidably connected inside the insulating shell 301. An anode body 302 is fixedly connected inside the fixed wing 304. A fan-shaped hole is opened on the fixed wing 304. A screen 305 matching itself is fixedly connected inside the fan-shaped hole. Multiple axial grooves 308 are opened on the side wall of the insulating shell 301. Multiple exchange holes 307 are opened at one end of the insulating shell 301.

[0020] To ensure the overall toughness of the combined sealing ring, the titanium carbonitride ring 1 and the inner ring seat 2 need to be made of different materials. The inner ring seat 2, as the liner, needs to be made of a material with high toughness compared to the titanium carbonitride ring 1, and its chemical properties are also more active than those of the titanium carbonitride ring 1. Since the two different materials, titanium carbonitride ring 1 and inner ring seat 2, are both in water-soluble or emulsion-type lubricants, electrochemical corrosion will also occur in the above-mentioned lubricants. The inner ring seat 2, which has higher electrochemical activity, will act as the anode of the electrochemical cell, resulting in electrochemical corrosion. Although the electrical connection can be isolated by coating the contact surface of titanium carbonitride ring 1 and inner ring seat 2 to prevent the occurrence of electrochemical cells and effectively protect the inner ring seat 2, once the above-mentioned insulating coating is worn during actual use, the titanium carbonitride ring 1 and inner ring seat 2 will re-electrically connect, accelerating the corrosion rate of the inner ring seat 2.

[0021] In this embodiment, multiple sacrificial anode units 3 are provided on the inner ring seat 2 to protect the inner ring seat 2. The inner ring seat 2 and the sacrificial anode units 3 are electrically connected to the anode body 302 through the contact post 204. During the use of the combined sealing ring, due to the connection of the connecting hole 103, the side through hole 203 and the exchange hole 307, the lubricating fluid in the working environment of the combined sealing ring will enter the sacrificial anode unit 3, so that the inner ring seat 2 and the anode body 302 can continuously form an electrochemical cell under the action of the lubricating fluid. The inner ring seat 2 and multiple anode bodies 302 form an electrochemical cell, and the anode body 302 becomes the anode, effectively protecting the inner ring seat 2 as the cathode, so that the inner ring seat 2 is not prone to electrochemical corrosion in water-soluble or emulsion-type lubricating fluid environments.

[0022] A tension spring 303 is fixedly connected to the fixed wing 304 and the inner wall of the insulating shell 301. The tension spring 303 and the anode body 302 are located on opposite sides of the fixed wing 304. A limiting ring 306 matching the position of the screen 305 is fixedly connected to the inner wall of the insulating shell 301. The inner wall of the limiting ring 306 is located inside the multiple screens 305. When the sacrificial anode unit 3 is not installed, the tension spring 303 pulls the fixed wing 304 tightly against the limiting ring 306. At this time, the screen 305 is blocked by the limiting ring 306, forming a sealed space at the position of the anode body 302 inside the insulating shell 301, which facilitates the technician to inject the corresponding lubricant in advance. During subsequent transportation and installation, the lubricant is less likely to leak, which facilitates the early production and storage of the sacrificial anode unit 3 and its large-scale use. At the same time, the lubricant is pre-injected into the insulating shell 301 to prevent a large amount of air from being trapped inside the insulating shell 301 when the lubricant soaks into it after the combined sealing ring is installed. This is less likely to affect the formation of the chemical cell and the protective function of the sacrificial anode unit 3.

[0023] An annular groove 102 is provided on the side wall of the stepped groove, and an annular groove 309 is provided on the outer wall of the insulating shell 301. The diameters of the annular groove 102, the connecting hole 103, the axial groove 104, the side through hole 203, the exchange hole 307, the axial groove 308, and the annular groove 309 are the same. The opening of the annular groove 102 and the annular groove 309 can increase the flow path of lubricant on the titanium carbonitride ring 1 and the sacrificial anode unit 3. Even if it is partially blocked by foreign objects, the lubricant can still be kept flowing, and the protective effect of the sacrificial anode unit 3 is not easily lost.

[0024] The diameter of the mesh 305 is smaller than that of the exchange hole 307. When the anode body 302 is working normally, excessive local corrosion may cause the anode body 302 to fall off in a localized manner. The presence of the mesh 305 can maintain the flow of lubricating fluid while preventing larger particles generated by the partial fall-off of the anode body 302 from flowing out of the insulating shell 301, and is less likely to cause blockage of lubricating fluid channels such as the exchange hole 307.

[0025] A threaded groove is provided on the side wall of the insulating housing 301. The threaded groove is located on the side of the insulating housing 301 away from the exchange hole 307. A hexagonal countersunk groove 310 is provided at the end of the insulating housing 301 away from the exchange hole 307. The sacrificial anode unit 3 is detachably fixedly connected to the anode groove 202 through the threaded groove, which facilitates the installation and replacement of the sacrificial anode unit 3 and makes it convenient to maintain the titanium carbonitride ring 1 and the inner ring seat 2.

[0026] Specifically, in this application, the titanium carbonitride ring 1 is made of a cermet-type hard alloy, which is a composite material made of hard phases such as tungsten carbide (WC), titanium carbide (TiC), and titanium carbonitride (Ti(C,N)) and binders such as cobalt (Co) and nickel (Ni) through powder metallurgy. The inner ring seat 2 is made of a suitable material according to the requirements of the combined sealing ring to ensure the overall toughness of the combined sealing ring. The anode body 302 is made of a material with higher metal activity than the inner ring seat 2. The insulating shell 301 and the fixed wing 304 are made of insulating material.

[0027] In this embodiment, in the environment of using water-soluble or emulsified lubricating fluid, an electrochemical anti-corrosion system is established by setting multiple sacrificial anode units 3 on the inner ring seat 2. The anode body 302 is used to form a protective anode. In the electrochemical battery system composed of the inner ring seat 2, the anode body 302 and the water-soluble or emulsified lubricating fluid, the anode body 302 forms the anode, replacing the inner ring seat 2 to corrode and protect the inner ring seat 2, making the structure of the combined sealing ring less prone to failure.

[0028] Second implementation method: Please see Figure 10 and Figure 11A detection cavity 312 is provided inside the anode body 302, located on the side of the anode body 302 near the fixed wing 304. A detection unit 4 is embedded inside the anode body 302, and an electrode 5 and an electrode 6 are fixedly connected to the detection unit 4. The ends of the electrodes 5 and 6 away from the detection unit 4 extend into the detection cavity 312. An indicator light 311 is fixedly connected to the insulating shell 301 and is electrically connected to the detection unit 4. The detection unit 4 integrates a power supply, a current sensor, and a control terminal. The outer walls of the electrodes 5 and 6 are covered with an insulating layer. The electrodes 5 and 6 are only separated from the detection unit 4 by one end. With the anode body 302 exposed, after the detection chamber 312 is exposed due to corrosion, the lubricant will enter the detection chamber 312 and connect electrode 5 and electrode 6. At this time, a path is formed between the detection unit 4, electrode 5, electrode 6 and the lubricant. The current sensor detects data indicating that the anode body 302 has been excessively corroded and needs to be replaced. The control terminal sends an excessive corrosion signal to the external receiver (smart devices such as mobile phones) and the indicator light 311. The external receiver reminds the technicians to replace it in time. When the technicians disassemble and replace it, the lit indicator light 311 can identify the sacrificial anode unit 3 that needs to be replaced during disassembly.

[0029] A partition plate 313 is fixedly connected inside the detection chamber 312. The partition plate 313 separates electrode 5 and electrode 6 into two isolated spaces, which avoids voltage breakdown between electrode 5 and electrode 6, making it less likely for the current sensor to falsely detect the detection data and to issue false alarms.

[0030] The partition plate 313 has a connection hole 314. The position of the connection hole 314 is offset from that of electrode 5 and electrode 6. When the anode body 302 is partially corroded and the detection chamber 312 is partially exposed, the lubricating fluid can flow into the adjacent isolated space through the connection hole 314 and send out the excessive corrosion signal in time.

[0031] In an ideal operating environment for the combined sealing ring, the corrosion rate of the anode body 302 can be calculated. Technicians can schedule the replacement of the sacrificial anode unit 3 according to the usage time. However, as the usage time increases, the lubricant may deteriorate, affecting the corrosion rate of the anode body 302. This makes it impossible to accurately control the replacement of the sacrificial anode unit 3, which can easily lead to premature and excessive corrosion of the anode body 302, resulting in corrosion of the inner ring seat 2 and causing structural failure of the combined sealing ring.

[0032] In this embodiment, a detection unit 4, electrode 1 5, and electrode 2 6 are added inside the anode body 302 to monitor the corrosion status of the anode body 302. When excessive corrosion occurs in the anode body 302, an early warning is issued in time to remind technicians to replace it in time and protect the inner ring seat 2, so that the structure of the combined sealing ring is not easy to fail.

[0033] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A combined high-stability titanium carbonitride cemented carbide sealing ring, comprising a matching titanium carbonitride ring (1) and an inner ring seat (2), characterized in that: The inner ring seat (2) is inserted into the titanium carbonitride ring (1). The titanium carbonitride ring (1) includes a sealing ring body (101). A stepped groove is provided in the sealing ring body (101). A plurality of axial grooves (104) are provided on the outer wall of the sealing ring body (101). The inner ring seat (2) includes a ring seat body (201). A stepped protrusion matching the stepped groove is provided at the lower end of the ring seat body (201). An anode groove (202) is provided in the part of the ring seat body (201) away from the stepped protrusion. A contact pile (204) is fixedly connected to the bottom plate of the anode groove (202). A side through hole (203) is provided on the side wall of the plurality of anode grooves (202). The side through hole (203) connects the anode groove (202) to the outside. The positions of the plurality of side through holes (203) are respectively matched with the positions of the plurality of connecting holes (103). A sacrificial anode unit (3) is inserted into the anode groove (202). The sacrificial anode unit (3) includes an insulating shell (301) and is threadedly connected to the anode groove (202). A fixed wing (304) matching itself is slidably connected inside the insulating shell (301). An anode body (302) is fixedly connected inside the fixed wing (304). A fan-shaped hole is opened on the fixed wing (304). A screen (305) matching itself is fixedly connected inside the fan-shaped hole. Multiple axial grooves (308) are opened on the side wall of the insulating shell (301). Multiple exchange holes (307) are opened at one end of the insulating shell (301).

2. The combined high-stability titanium carbonitride cemented carbide sealing ring according to claim 1, characterized in that: The fixed wing (304) is fixedly connected to the inner wall of the insulating shell (301) with a tension spring (303), and the tension spring (303) and the anode body (302) are respectively located on both sides of the fixed wing (304). The inner wall of the insulating shell (301) is fixedly connected with a limiting ring (306) that matches the position of the screen (305), and the inner wall of the limiting ring (306) is located inside the multiple screens (305).

3. The combined high-stability titanium carbonitride cemented carbide sealing ring according to claim 2, characterized in that: The stepped groove sidewall is provided with an annular groove 1 (102), and a connecting hole (103) is provided between the multiple axial grooves 1 (104) and the annular groove 1 (102). The outer wall of the insulating shell (301) is provided with an annular groove 2 (309), and the hole diameter and groove diameter of the annular groove 1 (102), the connecting hole (103), the axial groove 1 (104), the side through hole (203), the exchange hole (307), the axial groove 2 (308) and the annular groove 2 (309) are the same.

4. The combined high-stability titanium carbonitride cemented carbide sealing ring according to claim 1, characterized in that: The diameter of the sieve hole (305) is smaller than the diameter of the exchange hole (307).

5. A combined high-stability titanium carbonitride cemented carbide sealing ring according to claim 1, characterized in that: The insulating shell (301) has a threaded groove on its side wall. The threaded groove is located on the side of the insulating shell (301) away from the exchange hole (307). The insulating shell (301) has a hexagonal countersunk groove (310) at the end away from the exchange hole (307).

6. The combined high-stability titanium carbonitride cemented carbide sealing ring according to claim 1, characterized in that: The anode body (302) has a detection cavity (312) inside. The detection cavity (312) is located on the side of the anode body (302) near the fixed wing (304). The anode body (302) has a detection unit (4) embedded inside. Electrode 1 (5) and Electrode 2 (6) are fixedly connected to the detection unit (4). The ends of Electrode 1 (5) and Electrode 2 (6) away from the detection unit (4) extend into the detection cavity (312). An indicator light (311) is fixedly connected to the insulating shell (301), and the indicator light (311) is electrically connected to the detection unit (4).

7. A combined high-stability titanium carbonitride cemented carbide sealing ring according to claim 6, characterized in that: A partition plate (313) is fixedly connected inside the detection cavity (312), and the partition plate (313) separates electrode one (5) and electrode two (6) into two isolated spaces.

8. A combined high-stability titanium carbonitride cemented carbide sealing ring according to claim 7, characterized in that: The partition plate (313) has a connection hole (314), and the position of the connection hole (314) is offset from that of electrode one (5) and electrode two (6).

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