Double-line dry oil lubrication system and method for high-temperature fan-shaped section roller bearing

Abstract

The invention discloses a double-line dry oil lubrication system and method for a high-temperature fan-shaped section roller bearing, the double-line dry oil lubrication system comprises an electric lubrication pump, the electric lubrication pump is connected with a parallel double-line main oil pipeline, and an electric / electromagnetic directional valve is arranged between the parallel double-line main oil pipeline and the electric lubrication pump; the parallel-connection double-line main oil pipeline is connected with the parallel-connection double-line branch oil pipeline, an oil supply branch pipe is arranged on the parallel-connection double-line branch oil pipeline, each flow of the oil supply branch pipe is provided with a group of double-line oil distributors, inlets of the double-line oil distributors are connected with outlets of double-line pumps, outlets of the double-line oil distributors are connected into oil injection holes of roller bearing seats through the branch pipes, and the oil injection holes of the roller bearing seats are communicated with the oil supply branch pipe. Two groups of oil injection holes are symmetrically formed in the roller bearing seat, two groups of oil outlet holes are further formed in the roller bearing seat, the two groups of oil injection holes and the two groups of oil outlet holes are symmetrically formed in the radial direction of the roller bearing seat, and the parallel double-line main oil pipeline and the parallel double-line branch oil pipeline are made of stainless steel pipes.

Description

Technical Field

[0001] This invention belongs to the field of lubrication technology for metallurgical equipment, and specifically relates to a dual-line dry oil lubrication system and method for high-temperature sector roller bearings. Background Technology

[0002] During continuous casting production, the fan-shaped rollers are exposed to high temperatures (>150℃) and high steam environments for extended periods. Traditional single-line oil-air lubrication systems suffer from the following drawbacks: insufficient oil film retention: high-temperature steam erosion prevents lubricating oil from effectively remaining within the bearing housing; limited oil supply: large fluctuations in oil pressure within the single-line pipeline result in uneven oil distribution, making it difficult to cover multiple bearing points; high failure rate: roller bearings frequently seize due to lack of oil.

[0003] Existing improvement solutions (such as increasing oil pump pressure and optimizing nozzles) have not solved the problem of high-temperature oil film dispersion, and a systematic innovation in lubrication structure is urgently needed.

[0004] In view of the above factors, a dual-line dry oil lubrication system and method for high-temperature sector-shaped roller bearings is provided, which is suitable for solving the problem of roller bearing damage caused by single-line oil-air lubrication failure in high-temperature steam environment. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-line dry oil lubrication system and method for high-temperature sector roller bearings, in order to solve the problems mentioned in the background art.

[0006] The objective of this invention is achieved through the following technical solution: a dual-line dry oil lubrication system for high-temperature sector roller bearings, comprising an electric lubrication pump, wherein the electric lubrication pump is connected to a parallel dual-line main oil pipeline, and an electric / electromagnetic reversing valve is provided between the parallel dual-line dry oil pipeline and the electric lubrication pump.

[0007] The parallel double-line main oil pipeline is connected to the parallel double-line branch oil pipeline. The parallel double-line branch oil pipeline is equipped with an oil supply branch pipe. Each oil supply branch pipe is equipped with a set of double-line oil distributors. The inlet of the double-line oil distributor is connected to the outlet of the double-line pump, and the outlet of the double-line oil distributor is connected to the oil injection hole of the roller bearing seat through the branch pipe.

[0008] Furthermore, the roller bearing housing has two symmetrical sets of oil injection holes, and two sets of oil outlet holes are also provided on the roller bearing housing. The two sets of oil injection holes and the two sets of oil outlet holes are arranged symmetrically along the radial direction of the roller bearing housing.

[0009] Furthermore, the parallel double-line main oil pipeline and the parallel double-line branch oil pipeline are made of stainless steel.

[0010] Furthermore, the oil supply branch pipe is provided with several sets of parallel connections to the parallel double-line branch oil pipeline.

[0011] The branch pipe connected to the outlet of the dual-line oil separator adopts a radially symmetrical layout and is connected to the oil injection hole.

[0012] Furthermore, the parallel dual-line main oil pipeline is connected to the parallel dual-line branch oil pipeline, and a fiber optic pressure sensor is arranged to monitor the pressure distribution along the pipeline. The fiber optic pressure sensor has a resolution of 0.05 MPa.

[0013] Furthermore, heating devices are installed on the parallel double-line main oil pipeline and the parallel double-line branch oil pipeline. The heating devices are heating rings, and the heating rings are cast copper heating rings.

[0014] Furthermore, the cast copper heating ring is made of two sets of symmetrical cast copper rings spliced ​​together and fixed by bolts, and the length of the cast copper heating ring is 0.5-5m.

[0015] An application method for a dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings includes the following steps:

[0016] The electric lubrication pump and electric / electromagnetic directional valve are connected through the PLC control cabinet. The outlet end of the electric lubrication pump is connected to the electric / electromagnetic directional valve, and the outlet end of the electric / electromagnetic directional valve is connected to the parallel double-line main oil pipeline. The parallel double-line main oil pipeline is connected to the parallel double-line branch oil pipeline, and the parallel double-line branch oil pipeline is equipped with an oil supply branch pipe. The lubricating grease enters the double-line oil distributor through the oil supply branch pipe, and the double-line oil distributor is connected to the oil injection hole of the roller bearing seat through the branch pipe.

[0017] Among them, the branch pipe connected to the outlet of the dual-line oil separator adopts a radially symmetrical layout and is connected to the oil injection hole to reduce oil pressure attenuation. After being pressurized by the dual-line oil separator, an anti-erosion micro-adsorption oil film is formed in the bearing raceway, increasing the oil film retention rate in the bearing cavity from 40% to 95%, and extending the service life of the roller from 15 days to more than 6 months.

[0018] The working pressure of the dual-line pump is set to 20MPa, the alternating oil supply cycle is 15 minutes / line, and the distribution ratio of the oil distributor is adjusted so that the oil quantity error of each bearing is ≤5%.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention is applicable to solving the problem of roller bearing damage caused by single-line oil-gas lubrication failure in high-temperature steam environments. By increasing the oil supply and pressure stability, the lubricating oil forms a lasting oil film in the bearing cavity, thus eradicating the problem of roller jamming.

[0021] The application of this invention has led to a 100% reduction in bearing replacement rate, an increase in bearing cavity oil film retention rate from 40% to 95%, and an extension of roller lifespan from 15 days to more than 6 months. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall connection of the present invention;

[0023] Figure 2 This is the present invention. Figure 1 Enlarged view of a portion;

[0024] Figure 3 This is a schematic diagram of the fiber optic grating pressure sensor connection of the present invention;

[0025] Figure 4 This is a schematic diagram of the fit between the cast copper heating ring and the pipeline of the present invention;

[0026] Figure 5 This is a schematic diagram of the cross-section of the cast copper heating ring of the present invention. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] like Figure 1-5 As shown, a dual-line dry oil lubrication system for high-temperature sector roller bearings includes an electric lubrication pump 1, which is connected to a parallel dual-line main oil pipeline 2, and an electric / electromagnetic reversing valve 3 is provided between the parallel dual-line dry oil pipeline 2 and the electric lubrication pump 1.

[0031] The parallel double-line main oil pipeline 2 is connected to the parallel double-line branch oil pipeline 4. The parallel double-line branch oil pipeline 4 is equipped with an oil supply branch pipe 5. Each flow of the oil supply branch pipe 5 is equipped with a set of double-line oil distributors 6. The inlet of the double-line oil distributor 6 is connected to the outlet 7 of the double-line pump, and the outlet of the double-line oil distributor 6 is connected to the oil injection hole of the roller bearing seat through a branch pipe 8.

[0032] To facilitate the formation of an anti-erosion micro-adsorption oil film on the roller bearing raceway during use and extend the service life of the roller bearing, two symmetrical sets of oil injection holes 9 are provided on the roller bearing housing. Two sets of oil outlet holes 10 are also provided on the roller bearing housing. The two sets of oil injection holes 9 and the two sets of oil outlet holes 10 are arranged radially symmetrically along the roller bearing housing. The branch pipe 8 connected to the outlet of the dual-line oil separator 6 is arranged radially symmetrically and connected to the oil injection holes 9.

[0033] The parallel double-line main oil pipeline 2 and the parallel double-line branch oil pipeline 4 are made of stainless steel. The oil supply branch pipe 5 is provided with several sets of parallel connections to the parallel double-line branch oil pipeline 4.

[0034] To facilitate pressure monitoring along the pipeline using fiber optic pressure sensors during operation, fiber optic pressure sensors are installed on the parallel dual-line main oil pipeline 2 and the parallel dual-line branch oil pipeline 4 to monitor the pressure distribution along the pipeline. The fiber optic pressure sensors have a resolution of 0.05 MPa.

[0035] The aforementioned fiber Bragg grating pressure sensor is electrically connected to the PLC control cabinet. The pressure monitored by the fiber Bragg grating pressure sensor is displayed on the display screen on the PLC control cabinet 13. The fiber Bragg grating pressure sensor is screwed onto the pipeline.

[0036] To ensure smooth flow of grease in the pipeline during use and avoid blockage, heating devices 11 are installed on the parallel double-line main oil pipeline 2 and the parallel double-line branch oil pipeline 4. The heating device 11 is a heating ring, which is a cast copper heating ring.

[0037] The heating ring is detachably installed on the pipeline, and is installed on the parallel double-line main oil pipeline, the parallel double-line branch oil pipeline, the oil supply branch pipeline and the connected branch pipeline.

[0038] To facilitate disassembly and installation during use, the cast copper heating ring is made of two sets of symmetrical cast copper rings spliced ​​together and fixed with bolts. The length of the cast copper heating ring is 0.5-5m.

[0039] The cast copper heating ring is equipped with terminals, which are connected to the power supply via connecting wires.

[0040] An application method for a dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings includes the following steps:

[0041] The electric lubrication pump and electric / electromagnetic directional valve are connected through the PLC control cabinet. The outlet end of the electric lubrication pump is connected to the electric / electromagnetic directional valve, and the outlet end of the electric / electromagnetic directional valve is connected to the parallel double-line main oil pipeline. The parallel double-line main oil pipeline is connected to the parallel double-line branch oil pipeline, and the parallel double-line branch oil pipeline is equipped with an oil supply branch pipe. The lubricating grease enters the double-line oil distributor through the oil supply branch pipe, and the double-line oil distributor is connected to the oil injection hole of the roller bearing seat through the branch pipe.

[0042] Among them, the branch pipe connected to the outlet of the dual-line oil separator adopts a radially symmetrical layout and is connected to the oil injection hole to reduce oil pressure attenuation. After being pressurized by the dual-line oil separator, an anti-erosion micro-adsorption oil film is formed in the bearing raceway, increasing the oil film retention rate in the bearing cavity from 40% to 95%, and extending the service life of the roller from 15 days to more than 6 months.

[0043] The working pressure of the dual-line pump is set to 20MPa, the alternating oil supply cycle is 15 minutes / line, and the distribution ratio of the oil distributor is adjusted so that the oil quantity error of each bearing is ≤5%.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual line, dry oil lubrication system for high temperature sector roller bearings characterized by: Includes an electric lubrication pump (1), the electric lubrication pump (1) is connected to a parallel double-line main oil pipeline (2), and an electric / electromagnetic reversing valve (3) is provided between the parallel double-line main oil pipeline (2) and the electric lubrication pump (1); The parallel double-line main oil pipeline (2) is connected to the parallel double-line branch oil pipeline (4). The parallel double-line branch oil pipeline (4) is provided with an oil supply branch pipe (5). Each flow of the oil supply branch pipe (5) is equipped with a set of double-line oil separators (6). The inlet of the double-line oil separator (6) is connected to the outlet (7) of the double-line pump. The outlet of the double-line oil separator (6) is connected to the oil injection hole of the roller bearing seat through the branch pipe (8).

2. The dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 1, characterized in that: The roller bearing housing has two symmetrical sets of oil injection holes (9) and two sets of oil outlet holes (10). The two sets of oil injection holes (9) and the two sets of oil outlet holes (10) are arranged symmetrically along the radial direction of the roller bearing housing.

3. The dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 2, characterized in that: The parallel double-line main oil pipeline (2) and the parallel double-line branch oil pipeline (4) are made of stainless steel.

4. The dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 3, characterized in that: The oil supply branch pipe (5) is provided with several sets of parallel connections to the parallel double-line branch oil pipeline (4).

5. The dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 4, characterized in that: The branch pipe (8) connected to the outlet of the dual-line oil separator (6) adopts a radially symmetrical layout and is connected to the oil injection hole (9).

6. The dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 5, characterized in that: The fiber optic pressure sensor (12) arranged on the parallel double-line main oil pipeline (2) and the parallel double-line branch oil pipeline (4) monitors the pressure distribution along the pipeline. The fiber optic pressure sensor (12) has a resolution of 0.05 MPa.

7. The dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 6, characterized in that: Heating devices (11) are installed on the parallel double-line main oil pipeline (2) and the parallel double-line branch oil pipeline (4). The heating device (11) is a heating ring, and the heating ring is a cast copper heating ring.

8. The dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 7, characterized in that: The cast copper heating ring consists of two sets of symmetrical cast copper rings spliced ​​together and fixed with bolts. The length of the cast copper heating ring is 0.5-5m.

9. An application method of the dual-line dry oil lubrication system for high-temperature sector-shaped roller bearings according to claim 8, characterized in that: Includes the following steps: The electric lubrication pump and electric / electromagnetic directional valve are connected through the PLC control cabinet. The outlet end of the electric lubrication pump is connected to the electric / electromagnetic directional valve, and the outlet end of the electric / electromagnetic directional valve is connected to the parallel double-line main oil pipeline. The parallel double-line main oil pipeline is connected to the parallel double-line branch oil pipeline, and the parallel double-line branch oil pipeline is equipped with an oil supply branch pipe. The lubricating grease enters the double-line oil distributor through the oil supply branch pipe, and the double-line oil distributor is connected to the oil injection hole of the roller bearing seat through the branch pipe. Among them, the branch pipe connected to the outlet of the dual-line oil separator adopts a radially symmetrical layout and is connected to the oil injection hole to reduce oil pressure attenuation. After being pressurized by the dual-line oil separator, an anti-erosion micro-adsorption oil film is formed in the bearing raceway, increasing the oil film retention rate in the bearing cavity from 40% to 95%, and extending the service life of the roller from 15 days to more than 6 months. The working pressure of the dual-line pump is set to 20MPa, the alternating oil supply cycle is 15 minutes / line, and the distribution ratio of the oil distributor is adjusted so that the oil quantity error of each bearing is ≤5%.

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