A film bearing restriction nozzle and structural design method for compensating for in-line losses

Abstract

The application discloses an oil film bearing throttle nozzle and structural design method for compensating for the along-the-way loss, wherein the nozzle is provided with an oil supply channel, which comprises a first oil supply hole and a second oil supply hole, the aperture of the first oil supply hole is larger than that of the second oil supply hole, and the nozzle can divide the lubricating oil into the oil film bearing according to the requirement by small hole throttling. In the structural design method, the proximal port is determined based on the lubricating station, then the aperture and length of the nozzle connected to the proximal port are determined according to the oil supply flow of the oil film bearing, and then the throttle aperture and length of the nozzle connected to the distal port are determined according to the length difference in the length direction of the main oil supply pipeline, and the throttle aperture of the nozzle far away from the lubricating station is continuously increased with the increase of the length difference between the first port and the second port, so that the aperture of the nozzle far away from the lubricating station is adjusted, the along-the-way loss in the main oil supply pipeline is compensated for, the oil supply flow in the oil film bearings on both sides of the supporting roller is balanced, and the safety hidden danger is reduced.

Description

Technical Field

[0001] This invention relates to the field of oil film bearing technology, and in particular to an oil film bearing throttling nozzle and structural design method for compensating for friction loss. Background Technology

[0002] Some rolling mills are equipped with support rolls and oil film bearings. Based on the overall structure of the rolling mill equipment, the oil film bearings are usually located at both ends of the support roll along its length. Therefore, the lubrication system for supplying oil to the oil film bearings is also connected to both ends of the support roll along with the position of the oil film bearings.

[0003] In related technologies, oil film bearings are low-speed, heavy-load sliding bearings with high-viscosity lubricating oil. In oil film bearing lubrication systems, since the system is not located at the center of the rolling mill, oil supply lines on the operating and drive sides of the stand experience friction losses as the distance from the lubrication station increases. Furthermore, existing oil film bearing lubrication systems use throttling nozzles configured based on the required flow rate of each stand's oil film bearing, with all nozzles having the same orifice diameter.

[0004] In practical applications, due to the high viscosity of the lubricating oil in oil film bearings, if the lengths of the pipelines on the operating side and the transmission side of the oil film bearing differ significantly, the extension loss on the longer pipeline side will increase. This can easily lead to a smaller actual oil supply flow at the end of the oil film bearing with a longer pipeline distribution, resulting in insufficient oil supply flow to the oil film bearing that is further away. Ultimately, this can cause an increase in the heat generated by the bearing or even burn it out. Summary of the Invention

[0005] To address some or all of the technical problems existing in the prior art, the present invention provides an oil film bearing throttling nozzle and structural design method for compensating for friction loss.

[0006] The technical solution of the present invention is as follows:

[0007] According to a first aspect of the present invention, an oil film bearing throttling nozzle for compensating for friction loss is provided. The nozzle is provided with a through-hole oil supply channel, the oil supply channel including a first oil supply hole and a second oil supply hole that are fluidly connected to each other. The first oil supply hole and the second oil supply hole are coaxially arranged and located at opposite ends of the nozzle. The diameter of the first oil supply hole is larger than the diameter of the second oil supply hole. The end of the nozzle with the first oil supply hole is used to connect to an oil film bearing lubrication pipeline, and the end of the nozzle with the second oil supply hole is used to connect to an oil inlet hole of the bearing housing.

[0008] Optionally, the outer periphery of the end of the nozzle with the first oil supply hole is provided with a first external thread, the first external thread being used to connect to the oil film bearing lubrication pipeline, and the outer periphery of the end of the nozzle with the second oil supply hole is provided with a second external thread, the second external thread being used to connect to the bearing housing oil inlet hole.

[0009] According to a second aspect of the present invention, a structural design method is provided for a lubrication system having an oil film bearing and a main oil supply line. The main oil supply line in the lubrication system has a first port and a second port connected to the oil film bearing. The first port is used to connect to an operating side, and the second port is used to connect to a transmission side. An oil film bearing throttling nozzle as described in claim 1 or 2 is installed at the first port and the second port. The structural design method includes:

[0010] Based on the specifications and rotational speed of the oil film bearing in the lubrication system, determine the required oil supply flow rate for the oil film bearing;

[0011] Based on the layout of the lubrication system, the near-end port closer to the lubrication station and the far-end port farther from the lubrication station are determined in the first port and the second port.

[0012] Based on the required oil supply flow rate of the oil film bearing, determine the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the proximal port, wherein the throttling orifice diameter of the oil film bearing throttling nozzle corresponds to the second oil supply orifice of the nozzle.

[0013] Based on the layout of the lubrication system, the length difference between the first port and the second port in the length direction of the main oil supply pipeline is determined.

[0014] Based on the flow rate of lubricating oil in the main oil supply line and the length difference between the first port and the second port in the length direction of the main oil supply line, the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the distal port are determined. The greater the length difference between the first port and the second port, the larger the orifice diameter of the oil film bearing throttling nozzle connected to the distal port.

[0015] Optionally, the structural design method further includes:

[0016] Once the oil film bearing throttling nozzles connected to the near-end port and the far-end port are identified, marks are made on the selected oil film bearing throttling nozzles according to their respective installation positions to ensure that the different oil film bearing throttling nozzles are installed in the correct positions.

[0017] Optionally, in the structural design method, the oil film bearing throttling nozzle installed at the first port is an operating-side throttling nozzle, and the oil film bearing throttling nozzle installed at the second port is a transmission-side throttling nozzle. The operating-side throttling nozzle has an operating-side inlet for receiving lubricating oil from the main oil supply line and an operating-side outlet for outputting lubricating oil to the oil film bearing. The transmission-side throttling nozzle has a transmission-side inlet for receiving lubricating oil from the main oil supply line and a transmission-side outlet for outputting lubricating oil to the oil film bearing.

[0018] When the first port equipped with the operating side throttling nozzle is the proximal port closest to the lubrication station:

[0019] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 25L<Q≤50L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter φA=27mm of the operating side oil inlet, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0020] ;

[0021] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 50L<Q≤75L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0022] ;

[0023] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 75L<Q≤100L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0024] ;

[0025] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 100L<Q≤125L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0026] ;

[0027] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 125L<Q≤150L, ​​the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0028] ;

[0029] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 150L<Q≤175L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0030] ;

[0031] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 175L<Q≤200L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0032] ;

[0033] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 200L<Q≤225L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0034] ;

[0035] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 225L<Q≤250L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0036] ;

[0037] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 250L<Q≤275L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0038] ;

[0039] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 275L<Q≤300L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0040] ;

[0041] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 300L<Q≤325L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0042] ;

[0043] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 325L<Q≤350L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0044] ;

[0045] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 350L<Q≤375L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0046] ;

[0047] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 375L<Q≤400L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0048] ;

[0049] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 400L<Q≤425L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0050] ;

[0051] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 425L<Q≤450L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0052] ;

[0053] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 450L<Q≤475L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0054] ;

[0055] When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 475L<Q≤500L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40±0.2mm, the oil delivery length L2 of the operating side throttling nozzle is 76mm, and the orifice diameter φA of the operating side oil inlet is 27mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0056] .

[0057] Therefore, the main advantages of the technical solution of the present invention are as follows:

[0058] In the oil film bearing throttling nozzle and structural design method of the present invention for compensating for friction loss, the nozzle can be installed in a lubrication system with an oil film bearing. The oil film bearing throttling nozzle has a first oil supply hole for connecting to the oil film bearing lubrication pipeline and a second oil supply hole for connecting to the bearing housing oil inlet hole. Thus, lubricating oil from the oil film bearing lubrication pipeline can be supplied to the oil film bearing through the bearing housing oil inlet hole to achieve convective heat dissipation. Furthermore, the diameter of the first oil supply hole is larger than the diameter of the second oil supply hole. By throttling through a small orifice, the lubricating oil supplied by the oil film bearing lubrication pipeline can be evenly distributed to the oil film bearings of each frame according to the required flow rate in the oil film bearing throttling nozzle.

[0059] In this structural design method, the near-end port between the first port and the second port is determined based on the installation position of the lubrication station. Then, according to the required oil supply flow of the oil film bearing, the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the near-end port are determined. Then, according to the length difference between the first port and the second port in the length direction of the main oil supply pipeline, the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the far-end port are determined. In this method, by continuously increasing the throttling orifice diameter of the oil film bearing throttling nozzle farther from the lubrication station as the length difference between the first port and the second port increases, adjusting the orifice diameter of the drive-side throttling nozzle farther from the lubrication station can compensate for the friction loss in the main oil supply pipeline, thereby balancing the oil supply flow in the oil film bearings on both sides of the support roller and reducing safety hazards. Attached Figure Description

[0060] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and constitute a part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0061] Figure 1 This is a schematic diagram of an oil film bearing throttling nozzle for compensating for friction loss according to an embodiment of the present invention.

[0062] Figure 2 This is a schematic diagram of the installation structure of an oil film bearing throttling nozzle and a main oil supply pipeline in a lubrication system of a rolling mill according to an embodiment of the present invention.

[0063] Figure 3 This is a simplified flowchart illustrating a structural design method for an oil film bearing throttling nozzle for compensating for friction loss according to one embodiment of the present invention.

[0064] Figure 4This is a schematic diagram of the positional difference between the first port and the second port according to one embodiment of the present invention. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0066] The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0067] According to one embodiment of the present invention, a throttling nozzle for oil film bearings and a structural design method for compensating for friction losses are provided. This nozzle can be installed in a lubrication system with oil film bearings, and it compensates for friction losses of the lubricating oil in the main oil supply line by throttling through a small orifice. In this structural design method, lubricating oil in the throttling nozzle for oil film bearings located far from the lubrication station can be compensated based on friction losses in the oil supply line, ultimately achieving a balance in the oil supply flow to the oil film bearings in the rolling mill. The following is combined with... Figures 1 to 4 The oil film bearing throttling nozzle and structural design method for compensating for friction loss in this embodiment are further described.

[0068] Specifically, such as Figure 1 As shown, the oil film bearing throttling nozzle 1 used to compensate for friction loss in this embodiment is provided with a through oil supply channel. The oil supply channel includes a first oil supply hole 11 and a second oil supply hole 12 that are fluidly connected to each other. The first oil supply hole 11 and the second oil supply hole 12 are coaxially arranged and located at opposite ends of the nozzle 1. The diameter φA of the first oil supply hole 11 is larger than the diameter φB of the second oil supply hole 12. The end of the nozzle 1 with the first oil supply hole 11 is used to connect to the oil film bearing lubrication pipeline, and the end of the nozzle 1 with the second oil supply hole 12 is used to connect to the bearing housing oil inlet. The length of the second oil supply hole 12 can be represented by L1, and the overall oil delivery length of the nozzle 1 can be represented by L2.

[0069] In this embodiment, the oil film bearing throttling nozzle 1 can be installed in a lubrication system with an oil film bearing. Since the oil film bearing throttling nozzle 1 has oil supply holes with different orifice diameters, in actual design, by selecting an oil film bearing throttling nozzle 1 with a reasonable orifice diameter, the lubricating oil provided by the oil film bearing lubrication pipeline can be evenly distributed to the oil film bearings of each frame according to the required flow rate by means of small orifice throttling.

[0070] Furthermore, the nozzle 1 has a first external thread on the outer periphery of the end with the first oil supply hole 11, which is used to connect to the oil film bearing lubrication pipeline. The nozzle 1 also has a second external thread on the outer periphery of the end with the second oil supply hole 12, which is used to connect to the bearing housing oil inlet hole.

[0071] In this embodiment, a structural design method is also provided for a lubrication system. This structural design method enables the reasonable selection and setting of the oil film bearing throttling nozzle, thereby achieving a balance in the oil supply flow of the oil film bearing in the rolling mill.

[0072] like Figure 2 As shown, the lubrication system in this embodiment has an oil film bearing and a main oil supply line 3. The main oil supply line 3 has a first port and a second port for connecting the oil film bearing. The first port is used to connect to the operating side, and the second port is used to connect to the transmission side. The oil film bearing throttling nozzle is used to be installed to the first port and the second port.

[0073] Specifically, the oil film bearing throttling nozzle installed at the first port is the operating side throttling nozzle 1, and the oil film bearing throttling nozzle installed at the second port is the transmission side throttling nozzle 2.

[0074] The operating side throttling nozzle 1 has an operating side oil inlet for receiving lubricating oil from the main oil supply line 3 and an operating side oil outlet for outputting lubricating oil to the oil film bearing. It can be understood that the operating side oil inlet 1 corresponds to the second oil supply hole of the oil film bearing throttling nozzle, and the operating side oil outlet corresponds to the first oil supply hole of the oil film bearing throttling nozzle. That is, the diameter of the operating side oil inlet is smaller than the diameter of the operating side oil outlet.

[0075] The drive-side throttling nozzle 2 has a drive-side oil inlet for receiving lubricating oil from the main oil supply line 3 and a drive-side oil outlet for outputting lubricating oil to the oil film bearing. It can be understood that the drive-side oil inlet corresponds to the second oil supply hole of the oil film bearing throttling nozzle, and the drive-side oil outlet corresponds to the first oil supply hole of the oil film bearing throttling nozzle. That is, the diameter of the drive-side oil inlet is smaller than the diameter of the drive-side oil outlet.

[0076] In this embodiment, such as Figure 2 As shown, oil film bearings are provided at both ends of the support roller. The oil film bearing on the left side can be connected to the operating side pipeline 4 via the operating side throttling nozzle 1, and the oil film bearing on the right side can be connected to the driving side pipeline 5 via the driving side throttling nozzle 2. The operating side pipeline 4 and the driving side pipeline 5 are both connected to the main oil supply pipeline 3.

[0077] However, in actual use, due to the high viscosity of the lubricating oil, there is friction loss in the main oil supply line 3, and the oil supply in the line far from the lubrication station may be insufficient, which in turn leads to insufficient oil flow in the corresponding throttling nozzle.

[0078] Specifically, when the main oil supply line 3 supplies oil to the oil film bearings on both the operating side and the drive side, the different locations of the lubrication stations will result in a decrease in oil flow on the side farther from the lubrication station due to distance loss. For example, when the lubrication station is closer to the operating side, there is distance loss on the drive side. Conversely, when the lubrication station is closer to the drive side, there is distance loss on the operating side.

[0079] To effectively compensate for friction losses along the main oil supply pipeline 3, such as Figure 3 As shown, the structural design method in this embodiment includes:

[0080] S1: Determine the required oil supply flow rate for the oil film bearing based on the specifications and rotational speed of the oil film bearing in the lubrication system;

[0081] S2: Based on the layout of the lubrication system, determine the near-end port of the first port and the far-end port of the second port that is closer to the lubrication station;

[0082] S3: Determine the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the near end port according to the required oil supply flow rate of the oil film bearing, wherein the throttling orifice diameter of the oil film bearing throttling nozzle corresponds to the second oil supply orifice of the nozzle.

[0083] S4: Based on the layout of the lubrication system, determine the length difference between the first port and the second port in the length direction of the main oil supply pipeline;

[0084] S5: Based on the flow rate of lubricating oil in the main oil supply line and the length difference between the first port and the second port in the length direction of the main oil supply line, determine the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the far end port, wherein the greater the length difference between the first port and the second port, the larger the orifice diameter of the oil film bearing throttling nozzle connected to the far end port.

[0085] It is understandable that in step S1, the installation positions of the oil film bearings on both sides of the support roll can be determined according to the actual installation requirements of equipment such as rolling mills, and the required oil supply flow rate of the oil film bearings can be determined according to the specifications and speed of the oil film bearings, and an appropriate lubrication system can be selected accordingly.

[0086] In step S2, the location of the lubrication station in the lubrication system is obtained. Then, based on the layout of the oil supply pipeline in the lubrication system, the near-end port of the first port and the far-end port of the second port are determined. For example, when the first port is the near-end port, it means that the operating side is close to the lubrication station. In this case, there will be a delay loss in the oil supply to the transmission side. When the second port is the near-end port, it means that the transmission side is close to the lubrication station. In this case, there will be a delay loss in the oil supply to the operating side.

[0087] In step S3, the orifice diameter and length of the throttling nozzle connected to the near-end port of the oil film bearing need to be determined based on the required oil supply flow rate of the oil film bearing. The orifice diameter of the oil film bearing throttling nozzle corresponds to the second oil supply orifice of the nozzle. That is, the orifice diameter and length of the second oil supply orifice of the oil film bearing throttling nozzle connected to the port closest to the lubrication station are determined based on the required oil supply flow rate of the oil film bearing. For example, when the first port is the near-end port, the orifice diameter and length of the throttling nozzle on the operating side (i.e., the orifice diameter and length of the second oil supply orifice) need to be determined based on the required oil supply flow rate of the oil film bearing.

[0088] In step S4, the length difference between the first port and the second port is determined along the length of the main oil supply pipeline.

[0089] Finally, in step S5, the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the far-end port are determined based on the flow rate of lubricating oil in the main oil supply line and the length difference between the first port and the second port. That is, the orifice diameter and length of the second oil supply orifice of the oil film bearing throttling nozzle connected to the port furthest from the lubrication station are determined based on the oil supply flow rate in the main oil supply line and the distance between the two ports. For example, when the second port is the far-end port, the throttling orifice diameter and length of the drive-side throttling nozzle (i.e., the orifice diameter and length of the second oil supply orifice) need to be determined based on the required oil supply flow rate of the oil film bearing.

[0090] Therefore, in the structural design method of this embodiment, by continuously increasing the throttling orifice diameter in the throttling nozzle far from the lubricating oil station as the length difference between the first port and the second port increases, the throttling orifice diameter of the throttling nozzle far from the lubricating oil station can be adjusted, which can compensate for the friction loss in the main oil supply line 3, so that the oil supply flow in the oil film bearings on both sides of the support roller is balanced, and safety hazards are reduced.

[0091] Furthermore, the structural design method also includes: after determining the oil film bearing throttling nozzle connected to the near end port and the oil film bearing throttling nozzle connected to the far end port, marking the selected oil film bearing throttling nozzles according to their respective installation positions to ensure that the different oil film bearing throttling nozzles are installed in the correct positions.

[0092] In a specific embodiment, such as Figure 4 As shown, the lubrication station is located on the left side of the main oil supply line 3. Figure 1 The oil film bearing throttling nozzle shown can be regarded as the operating side throttling nozzle 1. At this time, the length of the operating side oil outlet is L1, the oil delivery length of the operating side throttling nozzle 1 is L2, the diameter of the operating side oil inlet is φA, and the diameter of the operating side oil outlet is φB.

[0093] In this embodiment, when the length difference between the first port and the second port is in the range of 0 to 500 mm, the friction loss in the main oil supply line 3 is small and can be ignored. At this time, the diameter of the oil outlet on the transmission side can be equal to the diameter of the oil outlet on the operation side.

[0094] Furthermore, when the length difference between the first port and the second port is greater than 500mm, as the length difference increases, the friction loss in the main oil supply line 3 will also increase. At this time, the diameter of the oil outlet on the transmission side can be made larger than the diameter of the oil outlet on the operating side. Moreover, as the length difference increases, the difference between the diameter of the oil outlet on the transmission side and the diameter of the oil outlet on the operating side increases.

[0095] In one embodiment, in order to ensure that the lubricating oil in the main oil supply line 3 enters the operating side throttling nozzle 1 and the transmission side throttling nozzle 2 with the same flow rate, the length L1 of the operating side oil outlet is equal to the length L11 of the transmission side oil outlet.

[0096] In one specific embodiment, the length L1 of the oil outlet on the operating side and the length L11 of the oil outlet on the transmission side are both 40±0.2mm.

[0097] In one embodiment, in order to facilitate the adjustment and control of the amount of lubricating oil output to the oil film bearing from the operating side throttling nozzle 1 and the transmission side throttling nozzle 2, the oil delivery length L2 of the operating side throttling nozzle 1 is equal to the oil delivery length L22 of the transmission side throttling nozzle 2.

[0098] In one specific embodiment, the oil delivery length L2 of the operating side throttling nozzle 1 and the oil delivery length L22 of the transmission side throttling nozzle 2 are both 76 mm.

[0099] In one embodiment, the diameter φA of the operating side oil inlet is equal to the diameter φA1 of the transmission side oil inlet.

[0100] In one specific implementation, the diameter φA of the operating side oil inlet and the diameter φA1 of the transmission side oil inlet are both 27mm.

[0101] Optionally, in the structural design method of this embodiment, the lubricating oil in the rolling mill lubrication system is of grade VG460.

[0102] To further illustrate the structural design method in this embodiment, in one specific embodiment, the first port on which the operating side throttling nozzle is installed is the proximal port near the lubrication station. The following will further illustrate this through some specific embodiments.

[0103] In the first embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 25L < Q ≤ 50L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0104]

[0105] In the second embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 50L < Q ≤ 75L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0106]

[0107] In the third embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 75L < Q ≤ 100L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0108]

[0109] In the fourth embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 100L < Q ≤ 125L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0110]

[0111] In the fifth embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 125L < Q ≤ 150L, ​​the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0112]

[0113] In the sixth embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 150L < Q ≤ 175L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0114]

[0115] In the 7th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 175L < Q ≤ 200L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0116]

[0117] In the 8th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 200L < Q ≤ 225L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0118]

[0119] In the 9th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 225L < Q ≤ 250L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0120]

[0121] In the 10th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 250L < Q ≤ 275L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0122]

[0123] In the 11th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 275L < Q ≤ 300L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0124]

[0125] In the 12th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 300L < Q ≤ 325L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0126]

[0127] In the 13th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 325L < Q ≤ 350L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0128]

[0129] In the 14th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 350L < Q ≤ 375L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0130]

[0131] In the 15th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 375L < Q ≤ 400L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0132]

[0133] In the 16th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 400L < Q ≤ 425L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0134]

[0135] In the 17th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 425L < Q ≤ 450L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0136]

[0137] In the 18th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 450L < Q ≤ 475L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0138]

[0139] In the 19th embodiment, when the oil supply flow rate Q of the oil film bearing in a frame satisfies: 475L < Q ≤ 500L, the lubricating oil grade is VG 460, the length L1 of the operating side oil outlet is 40 ± 0.2 mm, the oil delivery length L2 of the operating side throttling nozzle 1 is 76 mm, and the orifice diameter φA of the operating side oil inlet is 27 mm, as the length difference L0 between the first port and the second port in the length direction of the main oil supply pipeline changes, the orifice diameter φB of the operating side oil outlet of the operating side throttling nozzle and the orifice diameter φB1 of the transmission side oil outlet of the transmission side throttling nozzle satisfy the following relationship:

[0140]

[0141] Therefore, the oil film bearing throttling nozzle and structural design method for compensating for friction loss in this embodiment have the following advantages:

[0142] In this embodiment, the oil film bearing throttling nozzle and its structural design method for compensating for friction loss are described. The nozzle can be installed in a lubrication system with an oil film bearing. The oil film bearing throttling nozzle has a first oil supply port for connecting to the oil film bearing lubrication pipeline and a second oil supply port for connecting to the bearing housing inlet port. Thus, lubricating oil from the oil film bearing lubrication pipeline can be supplied to the oil film bearing through the bearing housing inlet port to achieve convective heat dissipation. Furthermore, the diameter of the first oil supply port is larger than that of the second oil supply port. By throttling through a small orifice, the lubricating oil supplied by the oil film bearing lubrication pipeline can be evenly distributed to the oil film bearings of each frame according to the required flow rate.

[0143] In this structural design method, the near-end port between the first port and the second port is determined based on the installation position of the lubrication station. Then, according to the required oil supply flow of the oil film bearing, the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the near-end port are determined. Then, according to the length difference between the first port and the second port in the length direction of the main oil supply pipeline, the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the far-end port are determined. In this method, by continuously increasing the throttling orifice diameter of the oil film bearing throttling nozzle farther from the lubrication station as the length difference between the first port and the second port increases, adjusting the orifice diameter of the drive-side throttling nozzle farther from the lubrication station can compensate for the friction loss in the main oil supply pipeline, thereby balancing the oil supply flow in the oil film bearings on both sides of the support roller and reducing safety hazards.

[0144] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, the terms "front," "back," "left," "right," "upper," and "lower" in this document refer to the placement shown in the accompanying drawings.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A structural design method for a lubrication system, the lubrication system having an oil film bearing and a main oil supply line, the main oil supply line having a first port and a second port connecting the oil film bearing, the first port being used to connect to the operating side, the second port being used to connect to the transmission side, and the first port and the second port being equipped with oil film bearing throttling nozzles for compensating for friction losses, wherein... The nozzle is provided with a through-hole for oil supply. The oil supply channel includes a first oil supply hole and a second oil supply hole that are fluidly connected to each other. The first oil supply hole and the second oil supply hole are coaxially arranged and located at opposite ends of the nozzle. The diameter of the first oil supply hole is larger than the diameter of the second oil supply hole. The end of the nozzle with the first oil supply hole is used to connect to the oil film bearing lubrication pipeline, and the end of the nozzle with the second oil supply hole is used to connect to the bearing housing oil inlet. The characteristic feature is that the structural design method of the lubrication system includes: Based on the specifications and rotational speed of the oil film bearing in the lubrication system, determine the required oil supply flow rate for the oil film bearing; Based on the layout of the lubrication system, the near-end port closer to the lubrication station and the far-end port farther from the lubrication station are determined in the first port and the second port. Based on the required oil supply flow rate of the oil film bearing, determine the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the proximal port, wherein the throttling orifice diameter of the oil film bearing throttling nozzle corresponds to the second oil supply orifice of the nozzle. Based on the layout of the lubrication system, the length difference between the first port and the second port in the length direction of the main oil supply pipeline is determined. Based on the flow rate of lubricating oil in the main oil supply line and the length difference between the first port and the second port in the length direction of the main oil supply line, the throttling orifice diameter and length of the oil film bearing throttling nozzle connected to the distal port are determined. The greater the length difference between the first port and the second port, the larger the orifice diameter of the oil film bearing throttling nozzle connected to the distal port.

2. The structural design method for the lubrication system according to claim 1, characterized in that, The structural design method for the lubrication system also includes: Once the oil film bearing throttling nozzles connected to the near-end port and the far-end port are identified, marks are made on the selected oil film bearing throttling nozzles according to their respective installation positions to ensure that the different oil film bearing throttling nozzles are installed in the correct positions.

3. The structural design method for the lubrication system according to claim 1, characterized in that, In the structural design method of the lubrication system, the oil film bearing throttling nozzle installed at the first port is an operating-side throttling nozzle, and the oil film bearing throttling nozzle installed at the second port is a transmission-side throttling nozzle. The operating-side throttling nozzle has an operating-side inlet for receiving lubricating oil from the main oil supply line and an operating-side outlet for outputting lubricating oil to the oil film bearing. The transmission-side throttling nozzle has a transmission-side inlet for receiving lubricating oil from the main oil supply line and a transmission-side outlet for outputting lubricating oil to the oil film bearing. When the first port equipped with the operating side throttling nozzle is the proximal port closest to the lubrication station: When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 25L<Q≤50L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 50L<Q≤75L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 75L<Q≤100L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 100L<Q≤125L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 125L<Q≤150L, ​​the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 150L<Q≤175L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the diameter of the operating side outlet orifice of the operating side throttling nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 175L<Q≤200L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, the oil flow rate Q of the oil film bearing in the frame satisfies: 175L<Q≤200L, the oil delivery length L2=76mm, and the oil delivery length φA=27mm, the oil flow rate Q of the operating side oil film bearing is 175L<Q≤200L, the oil delivery length L2=76mm, and ... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 200L<Q≤225L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 225L<Q≤250L, the lubricating oil grade is VG 460, the length of the oil outlet on the operating side L1=40±0.2mm, the oil delivery length of the throttling nozzle on the operating side L2=76mm, and the diameter of the oil inlet on the operating side φA=27mm, the oil flow rate Q of the oil film bearing in the operating side satisfies: 225L<Q≤250L ... oil delivery length of the oil inlet on the operating L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 250L<Q≤275L, the lubricating oil grade is VG 460, the length of the oil outlet on the operating side L1=40±0.2mm, the oil delivery length of the throttling nozzle on the operating side L2=76mm, and the diameter of the oil inlet on the operating side φA=27mm, the oil flow rate Q of the oil film bearing in the operating side satisfies: 250L<Q≤275L ... oil inlet diameter on the operating side φA=27mm, the oil flow rate Q of the oil film bearing in the operating side satisfies: 250L<Q≤275L, the oil delivery length of the throttling nozzle on the operating side L2=76mm, and the oil delivery length of the throttling nozzle on the operating side L2=76mm, the oil flow rate Q of the oil film bearing in the operating side L1=40±0.2mm, the oil delivery length of the throttling nozzle on the operating side L2=76mm, and the oil delivery length of the oil inlet on the operating side L2=27mm, the oil flow rate Q of the oil film bearing in the operating side L1=40±0.2mm, the oil delivery length of the throttling nozzle on the operating side L2=76mm, and the oil delivery length of the oil inlet on the operating side L2=27mm, the oil flow rate Q of the oil film bearing in the operating side L1=40±0.2mm, the oil delivery length of the throt L The change from 0 indicates the diameter of the operating side outlet orifice of the operating side throttling nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 275L<Q≤300L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, the oil flow rate Q of the oil film bearing in the frame satisfies: 275L<Q≤300L, the length of the operating side throttling nozzle L2=76mm, and the orifice diameter φA=27mm, the oil flow rate Q of the operating side oil film bearing in the frame satisfies: 275L<Q≤300L, the length of the operating side throttling nozzle L2=76mm, and the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 300L<Q≤325L, the lubricating oil grade is VG 460, the length of the oil outlet on the operating side L1=40±0.2mm, the oil delivery length of the throttling nozzle on the operating side L2=76mm, and the diameter of the oil inlet on the operating side φA=27mm, the oil flow rate Q of the oil film bearing in the frame satisfies: 300L<Q≤325L, the oil delivery length L2=76mm, and the oil inlet diameter φA=27mm, the oil flow rate Q of the oil film bearing on the operating side is as follows: L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 325L < Q ≤ 350L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1 = 40 ± 0.2 mm, the oil delivery length of the operating side throttling nozzle L2 = 76 mm, and the orifice diameter of the operating side oil inlet φA = 27 mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 350L<Q≤375L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 375L<Q≤400L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 400L<Q≤425L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 425L<Q≤450L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 450L<Q≤475L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: ； When the oil supply flow rate Q of the oil film bearing in the frame satisfies: 475L<Q≤500L, the lubricating oil grade is VG 460, the length of the operating side oil outlet L1=40±0.2mm, the oil delivery length of the operating side throttling nozzle L2=76mm, and the orifice diameter of the operating side oil inlet φA=27mm, with the length difference between the first port and the second port in the length direction of the main oil supply pipeline... L The change from 0 indicates the change in the diameter of the operating side outlet orifice of the operating side throttle nozzle. B The diameter of the oil outlet hole on the drive side of the throttling nozzle. B 1. Satisfies the following relationship: 。

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