Automatic feedback oil supply and lubrication system for sealing ring

Abstract

The application discloses a kind of automatic feedback oil supply lubrication systems of sealing ring, applied to rotating shaft, including pressure shell, first transition joint, second transition joint, first oil pipe, second oil pipe and lubricating oil distribution valve;Pressure shell is fixedly arranged on equipment rack, rotating shaft is rotated and is arranged in pressure shell, and pressure shell is equipped with working medium passage, pressure tapping, first oil channel and second oil channel;Lubricating oil distribution valve includes valve body, distribution cylinder and piston rod, distribution cylinder is formed with oil storage cavity and working medium cavity, and piston rod separates two cavities;When working, piston rod is moved to oil storage cavity side using equipment self working medium pressure, and lubricating medium is pressed into oil channel by the effect of piston pressure boost, to realize the automatic lubrication of sealing part between rotating shaft and pressure shell.The application does not need external power source, and oil injection pressure is real-time feedback response with working medium pressure, installation and maintenance are simple and fast, and the service life of sealing ring can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of sealing technology for rotating equipment, specifically to an automatic feedback oil supply lubrication system for sealing rings. Background Technology

[0002] In dynamic sealing systems, while the sealing quality and lifespan of the seal are significantly related to the material quality, operating parameters (such as temperature, pressure, and rotational speed), installation accuracy, and usage conditions (such as start-stop frequency), these factors often exert their influence indirectly through the lubrication condition. The lubrication condition during seal operation is a key factor affecting the service life of the seal.

[0003] When the medium has no lubricating properties and is corrosive, the lubricant can play a role in anti-corrosion, corrosion prevention and friction reduction. It can effectively reduce the corrosion of the substrate near the seal caused by leakage of micro gaps between the seal and the groove and friction contact surface, reduce and slow down the reduction of surface roughness due to corrosion, and improve the surface quality of the sealing surface.

[0004] However, many existing locations do not meet the conditions for installing a lubrication system, mainly due to the following reasons: insufficient lubricant volume required; mismatch between lubrication pressure and working medium pressure; inconsistent lubrication point placement by different manufacturers; and insufficient economic necessity for installing automatic lubrication stations.

[0005] The above reasons have led to premature and accidental leaks in the existing sealing system, causing harm and potential hazards to all aspects of production, safety, and the environment.

[0006] There are two existing solutions for the lubrication system of the sealing ring in rotary sealing equipment:

[0007] Unlubricated system: The equipment does not have a sealing ring lubrication port. Lubrication is provided by the grease applied during the installation of the sealing ring. It is mainly suitable for non-corrosive gas or hydraulic oil media systems.

[0008] Equipment with lubrication ports: This involves installing oil nozzles and periodically adding grease to ensure the sealing rings are kept under basic lubrication during operation. There are two lubrication options: manual and automatic lubrication systems. Automatic lubrication systems are complex and primarily used for critical, large equipment with high frequency of lubrication, large oil consumption or circulation volumes. Each time equipment is replaced, the system needs to be disconnected and reconnected. Due to size control issues, different batches of products may have inconsistent thread specifications, locations, and lubrication pressure values ​​at various points. Installation requires on-site re-laying of pipelines, causing considerable inconvenience. Adjusting system lubrication parameters during lubrication also presents challenges for maintenance personnel. Currently, most organizations use manual timed lubrication, but manual lubrication suffers from problems such as inaccurate control of lubrication time, reliance on experience for pressure control, and inability to achieve balanced lubrication, continuous lubrication, and pressure-maintaining lubrication.

[0009] Therefore, extending the lifespan and improving the reliability of dynamic seals are urgent technical problems that need to be solved. Summary of the Invention

[0010] The purpose of this invention is to overcome or at least partially solve the above-mentioned problems by providing an automatic feedback oil supply lubrication system for the sealing ring.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: an automatic feedback oil supply lubrication system for sealing rings, applied to a rotating shaft, comprising:

[0012] A pressure-resistant housing is fixedly installed on the equipment frame. The rotating shaft rotatably passes through the pressure-resistant housing. One side of the pressure-resistant housing is provided with a working medium channel, and the other side is provided with a pressure tapping channel, a first oil passage, and a second oil passage.

[0013] The first transition joint is disposed on the pressure-resistant shell and communicates with the first oil passage;

[0014] The second transition joint is disposed on the pressure-resistant shell and communicates with the second oil passage;

[0015] The first oil pipe is connected at one end to the first transition joint and at the other end to the lubricating oil distribution valve.

[0016] The second oil pipe is connected at one end to the second transition joint and at the other end to the lubricating oil distribution valve.

[0017] A lubricating oil distribution valve includes a valve body, a distribution cylinder, a piston rod, and an oil reservoir. The valve body is connected to a pressure tapping channel of a pressure-resistant shell. The distribution cylinder forms an oil reservoir and a working medium cavity connected to the pressure tapping channel. The piston rod is slidably disposed in the distribution cylinder and separates the oil reservoir from the working medium cavity. The oil reservoir is connected to a first oil pipe and a second oil pipe.

[0018] During operation, the working medium enters the pressure tapping channel through the working medium channel, and then enters the working medium cavity to push the piston rod to move towards the oil storage cavity side, pressing the lubricating medium in the oil storage cavity into the first oil pipe and the second oil pipe, and into the first oil passage and the second oil passage, thereby realizing automatic lubrication of the sealing parts between the rotating shaft and the pressure-resistant shell.

[0019] Preferably, a third sealing ring and a fourth sealing ring are respectively provided between the rotating shaft and the pressure-resistant shell and at positions corresponding to the first oil passage and the second oil passage, so that the lubricating medium entering the first oil passage and the second oil passage can lubricate the third sealing ring and the fourth sealing ring.

[0020] Preferably, a first sealing ring and a second sealing ring are respectively provided between the pressure-resistant shell and the first transition joint and the second transition joint; a first O-ring is provided between one end of the first oil pipe and the first transition joint, and a fourth O-ring is provided between one end of the second oil pipe and the second transition joint.

[0021] Preferably, the lubricating oil distribution valve further includes a threaded plug with holes, a spring, a conical valve needle, a valve needle seal, a sleeve, a valve cap, a guide rod, a conical tube with rubber threads, a cylinder head, a screw, a cylinder body A-way threaded end, a cylinder body B-way threaded end, a cylinder bottom, and a protective cover.

[0022] One side of the distribution cylinder is connected to a cylinder cover by screws, and the other side of the distribution cylinder is provided with a cylinder bottom. The piston rod passes through the cylinder bottom, and a protective cover is screwed onto the cylinder bottom. The distribution cylinder is also provided with cylinder body A threaded end and cylinder body B threaded end, which are connected to the oil storage chamber. The cylinder body A threaded end and cylinder body B threaded end are respectively connected to the corresponding first oil pipe and second oil pipe.

[0023] One end of the sleeve is screwed to the cylinder head via a tapered tube thread. The internal cavity of the sleeve is connected to the working medium cavity. The valve body is axially inserted into the sleeve. The bottom end of the valve body extends out of the sleeve and is threadedly connected to the pressure tapping channel. The top end of the valve body extends out of the sleeve and is threadedly connected to the valve cap. The guide rod and the tapered valve needle are sequentially arranged axially in the inner hole of the valve body. The spring is sleeved on the outside of the tapered valve needle. Under the action of the spring, the tapered valve needle can abut against the end face of the guide rod. One end of the spring abuts against the tapered valve needle, and the other end abuts against the perforated plug. The perforated plug is threadedly connected to the bottom of the inner hole of the valve body. The perforated plug pre-tightens the spring.

[0024] Preferably, grooves are provided on the outer circumferential surface of the piston rod and on the inner wall of the cylinder bottom through which the piston rod penetrates, and a seventh O-ring and an eighth O-ring are respectively provided in the two grooves. The cylinder head is also provided with grooves, and a sixth O-ring is provided in the grooves. The sixth O-ring is used for sealing between the end face of the cylinder head and the distribution cylinder.

[0025] Preferably, a fifth sealing ring is provided between the valve body and the pressure-resistant shell, a valve needle seal is provided between the conical valve needle and the valve body, and a sixth sealing ring is provided at both ends of the sleeve. The valve cap is threadedly connected to the valve body and presses the sleeve and the sixth sealing ring to achieve a seal. While the valve cap is threadedly connected to the valve body, the guide rod is pressed to the working position. The guide rod presses the conical valve needle to the working position, causing the valve needle and the valve needle seal to be in a disengaged state. The guide rod is provided with a groove, and a fifth O-ring is provided in the groove. The fifth O-ring contacts and seals with the valve body.

[0026] Preferably, the protective cover is provided with oil level markings.

[0027] Preferably, the perforated plug has a through hole, through which the working medium enters the bottom of the valve body's inner bore. The working medium flows upward through the gap between the cone valve needle and the valve body, and bypasses the guide rod to enter the inner cavity of the sleeve, realizing unidirectional flow of the working medium to the working medium cavity. When the valve cap is rotated away from the guide rod, the cone valve needle moves in the direction of the guide rod under the action of the spring and seals against the valve needle, cutting off the medium passage.

[0028] Preferably, a second O-ring is provided between the other end of the first oil pipe and the A-way thread of the cylinder body, and a third O-ring is provided between the other end of the second oil pipe and the B-way thread of the cylinder body.

[0029] Preferably, during operation, the working medium enters the pressure tapping channel through the working medium channel, and then enters the working medium cavity to push the piston rod to move towards the oil storage cavity side. Through the piston pressurization action, the lubricating medium in the oil storage cavity is forced into the first oil passage and the second oil passage. When the working medium pressure decreases, the piston rod moves in the opposite direction to reset under the negative pressure of the oil storage cavity, realizing automatic feedback oil supply according to the working medium pressure fluctuation.

[0030] Compared with existing technologies, this invention provides an automatic feedback oil supply lubrication system for sealing rings. By utilizing the working medium pressure of the equipment itself as the power source for the oil injection system, it eliminates the need for external oil supply networks and external power supplies, achieving automatic lubrication and real-time feedback response of the sealing parts, thus achieving the goals of continuous and uninterrupted lubrication and pressure-maintaining lubrication. Through the piston pressurization action, the pressure on the oil injection side is always kept positive relative to the working medium side, ensuring that the lubricating medium is continuously injected into the sealing parts, thereby enhancing the sealing effect and preventing medium leakage. Through the adsorption and removal effect of the lubricant, it achieves the effect of removing wear particles between the sealing surfaces and preventing abrasive wear, thereby protecting the surface of the sealing ring and improving its service life. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the automatic feedback oil supply and lubrication system for the sealing ring of the present invention;

[0032] Figure 2 This is a partially enlarged structural diagram of the connection between the lubricating oil distribution valve and the pressure-resistant shell of the present invention;

[0033] Figure 3 This is a partially enlarged structural schematic diagram of the lubricating oil distribution valve of the present invention.

[0034] In the diagram: 1. Rotating shaft; 2. Pressure housing; 3. First sealing ring; 4. First transition joint; 5. First O-ring; 6. First oil pipe; 7. Second O-ring; 8. Third O-ring; 9. Lubricating oil distribution valve; 10. Second oil pipe; 11. Fourth O-ring; 12. Second transition joint; 13. Second sealing ring;

[0035] 201. First oil passage; 202. Second oil passage; 203. Pressure tapping channel; 204. Working medium channel; 205. Third sealing ring; 206. Fourth sealing ring;

[0036] 901. Plug with hole; 902. Spring; 903. Fifth sealing ring; 904. Valve body; 905. Conical valve needle; 906. Valve needle seal; 907. Sleeve; 908. Sixth sealing ring; 909. Valve cap; 910. Fifth O-ring; 911. Guide rod; 912. Conical tube with rubber thread; 913. Cylinder head; 914. Screw; 915. Sixth O-ring; 916. Distributor cylinder; 917. Cylinder body A-way threaded end; 918. Cylinder body B-way threaded end; 919. Seventh O-ring; 920. Piston rod; 921. Cylinder bottom; 922. Eighth O-ring; 923. Protective cover. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings.

[0038] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this description, those skilled in the art can make creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0039] This invention provides an automatic feedback oil supply and lubrication system for sealing rings, which solves the technical problems in the prior art. The overall concept is as follows:

[0040] Example 1

[0041] Please see Figures 1-3 The present invention provides an automatic feedback oil supply lubrication system for sealing rings, applied to a rotating shaft 1, including a pressure-resistant shell 2, a first transition joint 4, a second transition joint 12, a first oil pipe 6, a second oil pipe 10, and a lubricating oil distribution valve 9.

[0042] The pressure-resistant housing 2 is fixedly mounted on the equipment frame, and the rotating shaft 1 is rotatably inserted inside the pressure-resistant housing 2. One side of the pressure-resistant housing 2 is provided with a working medium channel 204, and the other side is provided with a pressure tapping channel 203, a first oil passage 201, and a second oil passage 202.

[0043] The first transition joint 4 is disposed on the pressure-resistant shell 2 and communicates with the first oil passage 201. The second transition joint 12 is disposed on the pressure-resistant shell 2 and communicates with the second oil passage 202.

[0044] One end of the first oil pipe 6 is connected to the first transition joint 4, and the other end is connected to the lubricating oil distribution valve 9. One end of the second oil pipe 10 is connected to the second transition joint 12, and the other end is connected to the lubricating oil distribution valve 9.

[0045] The lubricating oil distribution valve 9 includes a valve body 904, a distribution cylinder 916, a piston rod 920, and an oil reservoir. The valve body 904 is connected to the pressure tapping channel 203 of the pressure-resistant housing 2. The distribution cylinder 916 forms an oil reservoir and a working medium chamber connected to the pressure tapping channel 203. The piston rod 920 is slidably disposed within the distribution cylinder 916, separating the oil reservoir from the working medium chamber. The oil reservoir is connected to the first oil pipe 6 and the second oil pipe 10.

[0046] During operation, the working medium enters the pressure tapping channel 203 through the working medium channel 204, and then enters the working medium cavity to push the piston rod 920 to move towards the oil storage cavity side, pressing the lubricating medium in the oil storage cavity into the first oil pipe 6 and the second oil pipe 10, and into the first oil passage 201 and the second oil passage 202, thereby realizing automatic lubrication of the sealing parts between the rotating shaft 1 and the pressure shell 2.

[0047] A third sealing ring 205 and a fourth sealing ring 206 are respectively provided between the rotating shaft 1 and the pressure-resistant shell 2, and at positions corresponding to the first oil passage 201 and the second oil passage 202. The lubricating medium entering the first oil passage 201 and the second oil passage 202 can lubricate the third sealing ring 205 and the fourth sealing ring 206.

[0048] A first sealing ring 3 and a second sealing ring 13 are respectively provided between the pressure shell 2 and the first transition joint 4 and the second transition joint 12. A first O-ring 5 is provided between one end of the first oil pipe 6 and the first transition joint 4, and a fourth O-ring 11 is provided between one end of the second oil pipe 10 and the second transition joint 12.

[0049] The lubricating oil distribution valve 9 also includes a perforated plug 901, a spring 902, a cone valve needle 905, a valve needle seal 906, a sleeve 907, a valve cap 909, a guide rod 911, a cone tube with rubber threads 912, a cylinder head 913, a screw 914, a cylinder body A-way threaded end 917, a cylinder body B-way threaded end 918, a cylinder bottom 921, and a protective cover 923.

[0050] One side of the distribution cylinder 916 is connected to the cylinder head 913 via screws 914, and the other side of the distribution cylinder 916 is provided with a cylinder bottom 921. The rod of the piston rod 920 passes through the cylinder bottom 921, and a protective cover 923 is screwed onto the cylinder bottom 921. The distribution cylinder 916 is also provided with a cylinder body A-way threaded end 917 and a cylinder body B-way threaded end 918 communicating with the oil reservoir. The cylinder body A-way threaded end 917 and the cylinder body B-way threaded end 918 are respectively connected to the corresponding first oil pipe 6 and second oil pipe 10.

[0051] One end of the housing 907 is screwed to the cylinder head 913 via a tapered tube thread 912, and the internal chamber of the housing 907 is connected to the working medium chamber. The valve body 904 is axially inserted into the housing 907, with the bottom end of the valve body 904 extending out of the housing 907 and threadedly connected to the pressure tapping channel 203, and the top end of the valve body 904 extending out of the housing 907 and threadedly connected to the valve cap 909.

[0052] The guide rod 911 and the cone valve needle 905 are sequentially arranged axially within the inner hole of the valve body 904. A spring 902 is sleeved on the outside of the cone valve needle 905, allowing the cone valve needle 905 to abut against the end face of the guide rod 911 under the action of the spring 902. One end of the spring 902 abuts against the cone valve needle 905, and the other end abuts against a perforated plug 901. The perforated plug 901 is threadedly connected to the bottom of the inner hole of the valve body 904, and pre-tightens the spring 902.

[0053] Grooves are provided on the outer circumferential surface of the piston rod 920 and on the inner wall of the cylinder bottom 921 through which the piston rod 920 penetrates. A seventh O-ring 919 and an eighth O-ring 922 are respectively installed in the two grooves. Grooves are also provided on the cylinder head 913, and a sixth O-ring 915 is installed in the grooves. The sixth O-ring 915 is used for sealing between the end faces of the cylinder head 913 and the distribution cylinder 916.

[0054] A fifth sealing ring 903 is provided between the valve body 904 and the pressure-resistant shell 2. A valve needle seal 906 is provided between the conical valve needle 905 and the valve body 904. A sixth sealing ring 908 is provided at both ends of the sleeve 907. The valve cap 909 is threadedly connected to the valve body 904 and presses the sleeve 907 and the sixth sealing ring 908 to achieve a seal. While the valve cap 909 is threadedly connected to the valve body 904, the guide rod 911 is pressed to the working position. The guide rod 911 presses the conical valve needle 905 to the working position, causing the valve needle 905 to be disengaged from the valve needle seal 906. The guide rod 911 has a groove, and a fifth O-ring 910 is provided in the groove. The fifth O-ring 910 contacts and seals with the valve body 904.

[0055] The cover 923 is equipped with oil level markings to indicate the piston position and determine the amount of oil in the oil reservoir.

[0056] The perforated plug 901 has a through hole, through which the working medium enters the bottom of the inner hole of the valve body 904. The working medium flows upward through the gap between the cone valve needle 905 and the valve body 904, and bypasses the guide rod 911 to enter the inner cavity of the sleeve 907, realizing unidirectional flow of the working medium to the working medium cavity. When the valve cap 909 is rotated away from the guide rod 911, the cone valve needle 905 moves in the direction of the guide rod 911 under the action of the spring 902 and abuts against the valve needle seal 906 to seal, cutting off the medium passage and preventing the working medium from leaking when other parts of the lubricating oil distribution valve 9 are removed due to malfunction.

[0057] A second O-ring 7 is provided between the other end of the first oil pipe 6 and the cylinder A threaded end 917, and a third O-ring 8 is provided between the other end of the second oil pipe 10 and the cylinder B threaded end 918.

[0058] During operation, the working medium enters the pressure tapping channel 203 through the working medium channel 204, and then enters the working medium chamber, pushing the piston rod 920 to move towards the oil reservoir side. Through the piston's pressurizing action, the lubricating medium in the oil reservoir is forced into the first oil passage 201 and the second oil passage 202. When the working medium pressure decreases, the piston rod 920 moves in the opposite direction to reset under the negative pressure of the oil reservoir, realizing automatic feedback oil supply according to the working medium pressure fluctuation.

[0059] This invention utilizes the working medium pressure of the equipment itself as the power source of the oil injection system. Through the piston pressurization action, the lubricating medium in the oil storage chamber is slowly injected into the first oil passage 201 and the second oil passage 202, so as to achieve continuous lubrication of the third sealing ring 205 and the fourth sealing ring 206 during operation, and ensure that the pressure on the oil injection side is always positive relative to the working medium side, so as to ensure that the lubricating medium always flows to the sealed working medium side.

[0060] This allows a lubricating oil film to form between the sealing surfaces of the rotating shaft 1 and the pressure-resistant shell 2, filling the microscopic gaps in the sealing surfaces, enhancing the sealing effect, preventing leakage of the sealed medium, and further preventing the sealing ring from developing tiny scratches due to dry friction.

[0061] Lubricants can absorb and remove tiny abrasive particles generated during the movement of the sealing ring, preventing these hard particles from causing "abrasive wear" between the sealing surfaces, thus protecting the sealing ring surface. In addition, high-quality lubricants also have rust-preventing and corrosion-preventing functions, further protecting the sealing ring and sealing surfaces and preventing metal corrosion particles from damaging the sealing ring. Positive oil injection pressure can effectively reduce premature failure deformation of the sealing ring caused by creep of plastic materials, improving the online service life of the sealing ring and achieving the goals of energy saving, environmental protection, safety, and longevity.

[0062] The above description of the embodiments is provided to facilitate understanding and use of the present invention by those skilled in the art. It is obvious to those skilled in the art that various modifications can be made to the embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, the present invention is not limited to the above embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. An automatic feedback oil supply lubrication system for sealing rings, applied to a rotating shaft (1), characterized in that, include: The pressure-resistant shell (2) is fixedly installed on the equipment frame. The rotating shaft (1) is rotatably inserted inside the pressure-resistant shell (2). The pressure-resistant shell (2) has a working medium channel (204) on one side and a pressure tapping channel (203), a first oil passage (201), and a second oil passage (202) on the other side. The first transition joint (4) is disposed on the pressure-resistant shell (2) and communicates with the first oil passage (201); The second transition joint (12) is disposed on the pressure-resistant shell (2) and communicates with the second oil passage (202); The first oil pipe (6) is connected at one end to the first transition joint (4) and at the other end to the lubricating oil distribution valve (9); The second oil pipe (10) is connected at one end to the second transition joint (12) and at the other end to the lubricating oil distribution valve (9); The lubricating oil distribution valve (9) includes a valve body (904), a distribution cylinder (916), a piston rod (920), and an oil storage chamber. The valve body (904) is connected to the pressure tapping channel (203) of the pressure-resistant shell (2). The distribution cylinder (916) has an oil storage chamber and a working medium chamber connected to the pressure tapping channel (203). The piston rod (920) is slidably disposed in the distribution cylinder (916) and separates the oil storage chamber from the working medium chamber. The oil storage chamber is connected to the first oil pipe (6) and the second oil pipe (10). During operation, the working medium enters the pressure tapping channel (203) through the working medium channel (204), and then enters the working medium cavity to push the piston rod (920) to move towards the oil storage cavity side, pressing the lubricating medium in the oil storage cavity into the first oil pipe (6) and the second oil pipe (10), and entering the first oil passage (201) and the second oil passage (202), thereby realizing automatic lubrication of the sealing part between the rotating shaft (1) and the pressure shell (2).

2. The automatic feedback oil supply lubrication system for sealing rings according to claim 1, characterized in that: A third sealing ring (205) and a fourth sealing ring (206) are respectively provided between the rotating shaft (1) and the pressure shell (2) and at the corresponding positions of the first oil passage (201) and the second oil passage (202). The lubricating medium entering the first oil passage (201) and the second oil passage (202) can lubricate the third sealing ring (205) and the fourth sealing ring (206).

3. The automatic feedback oil supply lubrication system for sealing rings according to claim 2, characterized in that: The pressure-resistant shell (2) is provided with a first sealing ring (3) and a second sealing ring (13) respectively between the first transition joint (4) and the second transition joint (12); a first O-ring (5) is provided between one end of the first oil pipe (6) and the first transition joint (4), and a fourth O-ring (11) is provided between one end of the second oil pipe (10) and the second transition joint (12).

4. The automatic feedback oil supply lubrication system for sealing rings according to claim 3, characterized in that: The lubricating oil distribution valve (9) also includes a perforated plug (901), a spring (902), a conical valve needle (905), a valve needle seal (906), a sleeve (907), a valve cap (909), a guide rod (911), a conical tube with rubber thread (912), a cylinder head (913), a screw (914), a cylinder A-way threaded end (917), a cylinder B-way threaded end (918), a cylinder bottom (921), and a protective cover (923). One side of the distribution cylinder (916) is connected to the cylinder cover (913) by screws (914), and the other side of the distribution cylinder (916) is provided with a cylinder bottom (921). The rod of the piston rod (920) passes through the cylinder bottom (921). A protective cover (923) is screwed onto the cylinder bottom (921). The distribution cylinder (916) is also provided with a cylinder body A-way threaded end (917) and a cylinder body B-way threaded end (918) that communicate with the oil storage chamber. The cylinder body A-way threaded end (917) and the cylinder body B-way threaded end (918) are respectively connected to the corresponding first oil pipe (6) and second oil pipe (10). One end of the housing (907) is screwed to the cylinder head (913) via a tapered tube thread (912). The internal chamber of the housing (907) is connected to the working medium chamber. The valve body (904) is axially inserted into the housing (907). The bottom end of the valve body (904) extends out of the housing (907) and is threadedly connected to the pressure tapping channel (203). The top end of the valve body (904) extends out of the housing (907) and is threadedly connected to the valve cap (909). The guide rod (911) and the tapered valve needle (905) are also present. The spring (902) is sleeved on the outside of the cone valve needle (905) and is arranged sequentially in the inner hole of the valve body (904) along the axial direction. The cone valve needle (905) can abut against the end face of the guide rod (911) under the action of the spring (902). One end of the spring (902) abuts against the cone valve needle (905) and the other end abuts against the perforated plug (901). The perforated plug (901) is threadedly connected to the bottom of the inner hole of the valve body (904) and the perforated plug (901) pre-tightens the spring (902).

5. The automatic feedback oil supply lubrication system for sealing rings according to claim 4, characterized in that: Grooves are provided on the outer circumferential surface of the piston rod (920) and on the inner wall of the cylinder bottom (921) through which the piston rod (920) penetrates. A seventh O-ring (919) and an eighth O-ring (922) are respectively provided in the two grooves. A groove is also provided on the cylinder head (913), and a sixth O-ring (915) is provided in the groove. The sixth O-ring (915) is used for sealing between the end face of the cylinder head (913) and the distribution cylinder (916).

6. The automatic feedback oil supply lubrication system for sealing rings according to claim 4, characterized in that: A fifth sealing ring (903) is provided between the valve body (904) and the pressure-resistant shell (2). A valve needle seal (906) is provided between the conical valve needle (905) and the valve body (904). A sixth sealing ring (908) is provided at both ends of the sleeve (907). The valve cap (909) is threadedly connected to the valve body (904) and presses the sleeve (907) and the sixth sealing ring (908) to achieve a seal. While the valve cap (909) is threadedly connected to the valve body (904), the guide rod (911) is pressed to the working position. The guide rod (911) presses the conical valve needle (905) to the working position, causing the valve needle (905) to be disengaged from the valve needle seal (906). The guide rod (911) is provided with a groove, and a fifth O-ring (910) is provided in the groove. The fifth O-ring (910) is in contact with the valve body (904) for sealing.

7. The automatic feedback oil supply lubrication system for sealing rings according to claim 4, characterized in that: The protective cover (923) is provided with oil level markings.

8. The automatic feedback oil supply lubrication system for sealing rings according to claim 4, characterized in that: The perforated plug (901) has a through hole. The working medium enters the bottom of the inner hole of the valve body (904) through the through hole. The working medium flows upward through the gap between the cone valve needle (905) and the valve body (904) and bypasses the guide rod (911) to enter the inner cavity of the sleeve (907), realizing unidirectional flow of the working medium to the working medium cavity. When the valve cap (909) is rotated away from the guide rod (911), the cone valve needle (905) moves in the direction of the guide rod (911) under the action of the spring (902) and abuts against the valve needle seal (906) to seal and cut off the medium passage.

9. The automatic feedback oil supply lubrication system for sealing rings according to claim 4, characterized in that: A second O-ring (7) is provided between the other end of the first oil pipe (6) and the cylinder A threaded end (917), and a third O-ring (8) is provided between the other end of the second oil pipe (10) and the cylinder B threaded end (918).

10. The automatic feedback oil supply lubrication system for sealing rings according to claim 1, characterized in that: During operation, the working medium enters the pressure tapping channel (203) through the working medium channel (204), and then enters the working medium cavity to push the piston rod (920) to move towards the oil storage cavity side. Through the piston pressurization action, the lubricating medium in the oil storage cavity is pressed into the first oil passage (201) and the second oil passage (202). When the working medium pressure decreases, the piston rod (920) moves in the opposite direction and resets under the negative pressure of the oil storage cavity, realizing automatic feedback oil supply according to the working medium pressure fluctuation.

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