Water turbine guide bearing assembly of water turbine and water turbine

Abstract

The utility model discloses a water turbine water guide bearing assembly and a water turbine, and relates to the technical field of water turbines, the water turbine water guide bearing assembly comprises a bearing bracket, a bearing bush and a fixed oil basin which are fixed on the bearing bracket, a rotary oil basin which is in running fit with the bearing bush, and an upper oil pipe which is communicated with the fixed oil basin and the rotary oil basin, a partition plate is arranged in the rotary oil basin and divides a space defined by the rotary oil basin and the main shaft into an upper space and a lower space, a center hole allowing the main shaft to penetrate through the partition plate is formed in the partition plate, and through holes allowing abrasive particles to fall into the lower space from the upper space are formed in the partition plate. The rotating oil basin, the bearing bush, and the upper oil pipe may be assembled such that a lower end of the bearing bush and an inlet end of the upper oil pipe are located in the upper space. The water turbine comprises the water guide bearing assembly. The water guide bearing assembly provided by the scheme has an abrasive particle isolation function, and meanwhile, the influence of abrasive particles on normal operation of an oil way can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbines, in particular to a water turbine water guide bearing assembly and a water turbine. Background Art

[0002] The turbine guide bearing, also known as the water guide bearing, is an important component of the vertical turbine. During the operation of the turbine, it bears the radial force of the main shaft to control the radial swing of the unit axis within the set range. The working state of the water-guided bearing directly affects the safety and reliability of the turbine. The operating temperature of the water-guided bearing is one of the important indicators of the good performance of the water-guided bearing. The oil circuit of the water-guided bearing plays a vital role in the operating temperature: in the prior art, the oil circuit of the water-guided bearing includes a bearing, a fixed oil basin, a rotating oil basin, an upper oil pipe and a cooler. Specifically, the rotating oil basin is arranged below the bearing and rotates synchronously with the main shaft. The lubricating oil in the rotating oil basin enters the fixed oil basin above the bearing through the upper oil pipe under a pressure difference. The bottom of the fixed oil basin is connected to the gap between the bearing and the main shaft. The lubricating oil flows back to the rotating oil basin through the gap and lubricates and cools the bearing in the process. The cooler is connected in series to the upper oil pipe. The coolant mostly uses cooling water as the cold fluid. The lubricating oil is cooled when passing through the cooler, so that the lubricating oil flowing back to the fixed oil basin can be cooled lubricating oil. The relevant prior art is the technical solution provided in the patent application document with application number CN 202211573693.4.

[0003] In the prior art, there are water-guided bearings with multi-petal bearings, and the bearings are of a parabolic structure. Such water-guided bearings have the characteristics of good cooling and lubrication effects, strong radial load-bearing capacity, and convenient installation and maintenance. The bearing surface and the outer wall surface of the main shaft form a friction pair during the operation of the water-guided bearing. In order to solve the problem that abrasive particles may enter the friction pair and seriously affect the life of the water-guided bearing, the prior art discloses a water-guided bearing provided with a filtering structure, specifically, the technical solution provided in the patent application document with application number CN 202320478473.7.

[0004] Further optimizing the structural design of water-guided bearings to promote their working performance stability is of great significance to ensuring the long-term reliable operation of the unit. Utility Model Content

[0005] In view of the technical problem of optimizing the structural design of water-guided bearings proposed above, the utility model provides a water-guided bearing assembly for a water turbine and a water turbine. The water-guided bearing assembly provided by the solution has an abrasive particle isolation function and can reduce the influence of abrasive particles on the normal operation of the oil circuit.

[0006] In view of the above problems, the water turbine water guide bearing assembly and the water turbine provided by the utility model solve the problems through the following technical points: the water turbine water guide bearing assembly includes a bearing frame, a bearing bush fixed on the bearing frame and a fixed oil pan, a rotating oil pan rotatably matched with the bearing bush, and an upper oil pipe connecting the fixed oil pan and the rotating oil pan, a partition is provided in the rotating oil pan, and the partition divides the space surrounded by the rotating oil pan and the main shaft into an upper space and a lower space, a center hole for the main shaft to pass through the partition is provided on the partition, and a through hole for abrasive particles to fall from the upper space to the lower space is provided on the partition;

[0007] The rotating oil pan, the bearing shell and the upper oil pipe may be assembled such that the lower end of the bearing shell and the inlet end of the upper oil pipe are located in the upper space.

[0008] When the water turbine water guide bearing assembly is working, a friction pair is formed between the bearing surface of the bearing and the main shaft. The friction pair is lubricated and cooled by lubricating oil. The oil basin and oil circuit for storing the lubricating oil are generally as follows: the rotating oil basin rotates with the main shaft, and the lubricating oil in it is introduced into the fixed oil basin through the upper oil pipe. The lubricating oil in the fixed oil basin flows back to the rotating oil basin through the friction pair to form a lubricating oil circulation loop. In actual use, because the abrasive particles remaining in the water guide bearing assembly or the abrasive particles generated on the friction pair in the case of poor lubrication may re-enter the friction pair with the lubricating oil circulation loop, the abrasive particles will cause the bearing surface and the main shaft to suffer serious wear damage. In view of the problem of the abrasive particles, the prior art proposes a solution of setting a filtering device at the inlet end of the upper oil pipe, but as the abrasive particles are enriched in the filtering device and the abrasive particles are not processed in time, the fixed oil basin will be insufficiently oiled, which will seriously affect the amount of lubricating oil entering the friction pair, and finally lead to insufficient lubrication and insufficient cooling of the friction pair. Based on the above, the present solution provides the above water turbine water guide bearing assembly.

[0009] During specific use of this solution, the amount of lubricating oil in the rotating oil basin is set so that the liquid level is higher than the inlet of the upper oil pipe to ensure that the lubricating oil in the rotating oil basin can smoothly enter the fixed oil basin through the upper oil pipe, so that there is enough lubricating oil in the fixed oil basin to provide lubrication and cooling functions for the friction pair. What is different from the prior art is that the space of the rotating oil basin is divided into an upper space and a lower space by the partition. In this way, when the abrasive particles enter the upper space from the gap between the bearing and the main shaft, these abrasive particles can fall into the lower space through the through holes on the partition, so that these abrasive particles no longer move with the lubricating oil circulation loop and enter the friction pair again, thereby achieving isolation of the abrasive particles relative to the lubricating oil circulation loop. At the same time, compared with setting a filtering device for intercepting abrasive particles at the inlet end of the upper oil pipe, the abrasive particles retained in the lower space do not affect the resistance during the circulation of the lubricating oil. Therefore, this solution also has the characteristic of reducing the influence of abrasive particles on the normal operation of the oil circuit.

[0010] In specific applications, for the rotating oil pan that is arranged on the main shaft through the annular protrusion on the main shaft, the difference between this rotating oil pan and the existing oil pan is that the partition is arranged in the rotating oil pan; for the rotating oil pan that is arranged on the main shaft through the shaft collar on the main shaft, in order to have enough space in the rotating oil pan to store lubricating oil, the shaft collar is a component of the rotating oil pan. In such an application, the through hole can be drilled on the bottom plate of the shaft collar, that is, the bottom plate serves as the partition, and the space above the bottom plate serves as the upper space, and a lower cylinder is provided at the lower end of the bottom plate to form the lower space.

[0011] As a further technical solution of the water turbine water guide bearing assembly:

[0012] In order to make the abrasive particles have a greater probability of falling into the lower space through the through holes, the partition is a mesh plate having multiple through holes thereon. Preferably, the mesh plate is a structure with mesh holes evenly arranged at various positions on the partition surface, and the mesh holes are the through holes. The mesh plate can be a flat mesh plate or a wire mesh plate.

[0013] When the water-guided bearing assembly is in operation, the lubricating oil absorbs heat when passing through the friction pair, and the lubricating oil in the rotating oil basin has a relatively high temperature. At the same time, in the prior art, a cooler connected in series to the upper oil pipe and arranged externally relative to the fixed oil basin is generally used to cool the lubricating oil from the rotating oil basin, so that the lubricating oil entering the fixed oil basin and flowing through the friction pair again has a relatively low temperature, so as to achieve good lubrication and cooling effects. At the same time, in the prior art, water cooling is mostly used to cool the lubricating oil, that is, water as a cold fluid is introduced into the cooler through a water circulation structure, and water and lubricating oil are exchanged through a partition wall. The temperature of the lubricating oil is reduced, but in actual use, due to the relatively complex water circulation structure, there are many fault points. For example, when the water supply is insufficient or the hot and cold processes of the cooler are turned on, it will cause insufficient cooling and heat dissipation capacity of the friction pair, and eventually there will be problems of burning tiles and oil overflow. Based on this problem, the following air-cooled cooler is further provided: it also includes a cooler connected in series on the upper oil pipe and located outside the fixed oil pan, the cooler includes an oil tank, an air duct and a blower, the oil tank is connected in series on the upper oil pipe, there are multiple air ducts, each air duct passes through the oil tank, and the inlet end of each air duct is located in the air outlet hood of the blower. When this solution is used in practice, the lubricating oil is the shell-side fluid, that is, it flows through the space outside the air duct in the oil tank, and the wind generated by the blower is used as the cold fluid and as the tube-side fluid, that is, it flows through the air duct, and the wall of the air duct is used as the heat exchange wall between the wind and the lubricating oil. Different from the existing lubricating oil water cooling solution, the source of the cold fluid in this solution is only the blower, and the wind flow path only includes the air outlet hood and the air duct, so the cold fluid source has an extremely low failure rate; at the same time, even if the heat exchange wall isolation fails, after the gas enters the fixed oil basin under wind pressure, compared with the oil-water mixture formed by cooling water mixed with lubricating oil, these gases will not cause a significant reduction in the lubrication performance of the fluid entering the friction pair, so this solution can effectively ensure the reliability of the operation of the water-guided bearing assembly. In specific application, the air outlet hood is a conical cylindrical structure, the small end of which serves as the inlet end and is connected to the outlet of the blower, the large end is sealed and connected to the side wall of the oil tank, the inlet end of each air duct extends into the air outlet hood, the connection and sealing of the air duct and the oil tank wall are achieved by strength expansion, and the outlet end of the air duct is exposed to the outside of the cooler, so that the inner wall of the air duct during operation can be cleaned at any time through the outlet end of the air duct, and the air duct is made of copper tube.

[0014] As a specific implementation and arrangement form of the oil tank, the oil tank is a bedroom container and is supported on a bearing frame, and the air duct is parallel to the axis of the oil tank;

[0015] The two interfaces on the oil tank for connecting with the upper oil pipe are located in the middle or upper part of the oil tank; one interface is located on the left side of the oil tank, and the other interface is located on the right side of the oil tank;

[0016] It also includes a baffle plate arranged in the oil tank, the baffle plate is arranged in the middle in the left and right directions of the oil tank, the baffle plate divides the internal space of the oil tank into a left chamber and a right chamber, and the left chamber and the right chamber are connected through the space below the baffle plate;

[0017] The left chamber and the right chamber each have an air duct passing through them. In this solution, each air duct extends along the axis of the oil tank, and the oil inlet and oil outlet of the oil tank are located in the middle or upper part of the oil tank and on a pair of opposite sides of the oil tank. In this way, the oil tank not only provides a lubricating oil storage function to enhance the cooling effect of the air duct on it, but also a baffle is set between the oil inlet and oil outlet. The baffle can make the lubricating oil entering the oil tank have a U-shaped flow on the cross section of the oil tank, and make the lubricating oil with a lower temperature on the oil inlet side pass through the space under the baffle after sedimentation and then enter the oil outlet side, and after being cooled again on the oil outlet side, enter the fixed oil basin through the upper oil pipe. The lubricating oil storage function and path restriction function provided by this solution can effectively ensure the cooling effect of the cooler on the lubricating oil.

[0018] Since the above oil tank has the function of storing lubricating oil, smaller abrasive particles may be deposited on the bottom side of the oil tank and the outer wall of the air duct. In order to facilitate the cleaning of the inside of the oil tank, a discharge hole is provided at the bottom of the oil tank and a flushing hole is provided at the top of the oil tank. In specific use, the discharge hole and the flushing hole can be a channel drilled on the wall of the oil tank, or a pipe hole connected to the pipe on the wall of the oil tank. When it is a pipe hole, a valve can be used for blocking, and when it is a channel, a plug can be used for blocking. When it is necessary to clean the sediment, open the discharge hole to discharge the lubricating oil, and then inject the cleaning agent or flushing agent through the flushing hole. During this process, the discharge hole can be in an open state to discharge the flushing agent at any time, or it can be in a closed state to use the cleaning agent to soak the sediment for a period of time before discharging, and then the oil tank is dried.

[0019] In order to further ensure the quality of the lubricating oil entering the fixed oil basin, a filter is connected in series on the upper oil pipe between the cooler and the fixed oil basin. In this solution, the lubricating oil entering the filter has been settled in the rotating oil basin and in the oil tank, so the filter is used to filter the abrasive particles with smaller particle size in the lubricating oil to ensure the quality of the lubricating oil entering the fixed oil basin. At the same time, since the abrasive content of the lubricating oil here is very small, it is not easy to affect the lubricating oil due to blockage.

[0020] In order to prevent the upper oil pipe from expanding and contracting due to temperature changes, which may cause the corresponding joint seal to fail and affect the lubrication of the lubricating oil, a bellows is connected in series on the upper oil pipe between the cooler and the rotating oil pan.

[0021] In order to effectively seal the gap formed between the rotating oil pan and the bearing shell and compensate the pressure of the corresponding contact surface after the packing is worn, a packing seat is arranged on the top of the rotating oil pan, and the inner side of the packing seat and the outer side of the bearing shell form a packing filling space, which also includes the packing filled in the packing filling space and the packing pressure plate bolted to the top surface of the packing seat.

[0022] In order to facilitate the installation and maintenance of the bearing and to make the bearing surface have good wear resistance, the bearing is a split structure including multiple single pieces. The single pieces forming the bearing are connected by bolts, and the inner side of each single piece is provided with a bearing surface layer providing a wear-resistant bearing surface.

[0023] In order to ensure the rigidity and strength of each component of the water-guided bearing assembly, the bearing frame, the fixed oil pan and the rotating oil pan are all made of ZG20SiMn or Q345B. In order to make the tile surface layer have stable characteristics at high temperatures, the tile surface layer is made of Babbitt alloy.

[0024] The side wall of the lower space is provided with an injection hole and a drainage hole, which have the same function as the discharge hole and the flushing hole provided on the above oil tank. In this solution, the injection hole and the drainage hole are used to clean the lower space when the turbine is shut down. In specific use, in order to optimize the force of the rotating oil basin and reduce its turning radius, the injection hole and the drainage hole are blocked with a plug during the operation of the water guide bearing assembly.

[0025] The present solution also relates to a water turbine, which is a specific application of the water-guided bearing assembly, comprising a main shaft and a water-guided bearing assembly, wherein the water-guided bearing assembly is a water-guided bearing assembly as described in any one of the above, wherein:

[0026] The bearing frame is arranged on the outer periphery of the main shaft, and the bearing bush is fixed on the bearing frame and matched with the main shaft;

[0027] The fixed oil pan is fixed on the bearing frame, and the gap between the upper end of the bearing shell and the main shaft is connected to the fixed oil pan;

[0028] The lower end of the rotating oil pan is fixed on the main shaft, the upper end of the rotating oil pan is rotatably matched with the bearing bush, and the gap between the lower end of the bearing bush and the main shaft is communicated with the upper space of the rotating oil pan.

[0029] The utility model has the following beneficial effects:

[0030] The present solution is different from the prior art in that the space of the rotating oil basin is divided into an upper space and a lower space by the partition, so that when the abrasive particles enter the upper space from the gap between the bearing and the main shaft, these abrasive particles can fall into the lower space through the through holes on the partition, so that these abrasive particles no longer move with the lubricating oil circulation circuit and enter the friction pair again, thereby achieving isolation of the abrasive particles relative to the lubricating oil circulation circuit. At the same time, compared with setting a filtering device for intercepting abrasive particles at the inlet end of the upper oil pipe, the abrasive particles retained in the lower space do not affect the resistance during the circulation of the lubricating oil. Therefore, the present solution also has the characteristic of reducing the influence of the abrasive particles on the normal operation of the oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A cross-sectional view of a specific embodiment of the bearing bush described in this solution;

[0032] Figure 2 A cross-sectional view of a structure formed by a specific embodiment of the water-guided bearing assembly described in this solution and the main shaft;

[0033] Figure 3 for Figure 2 A partial enlarged view of the middle A part, in which the end of the oil tank is perspective to show the baffle. The reference numerals in the figure are: 1, spindle, 2, fixed oil pan, 3, temperature sensor, 4, bearing frame, 5, bearing bush, 6, bush surface layer, 7, rotating oil pan, 8, partition, 9, plug, 10, upper oil pipe, 11, cooler, 12, shut-off valve, 13, filter, 14, upper space, 15, lower space, 16, air outlet cover, 17, oil tank, 18, air duct, 19, baffle. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the embodiments, but the present invention is not limited to the following embodiments:

[0035] Embodiment 1:

[0036] like Figures 1 to 3 As shown, the turbine water guide bearing assembly comprises a bearing frame 4, a bearing bush 5 fixed on the bearing frame 4, a fixed oil pan 2, a rotating oil pan 7 rotatably matched with the bearing bush 5, and an upper oil pipe 10 connecting the fixed oil pan 2 and the rotating oil pan 7. A partition 8 is provided in the rotating oil pan 7. The partition 8 divides the space surrounded by the rotating oil pan 7 and the main shaft 1 into an upper space 14 and a lower space 15. The partition 8 is provided with a central hole for the main shaft 1 to pass through the partition 8, and the partition 8 is provided with a through hole for abrasive particles to fall from the upper space 14 to the lower space 15.

[0037] The rotating oil pan 7 , the bearing bush 5 and the upper oil pipe 10 may be assembled such that the lower end of the bearing bush 5 and the inlet end of the upper oil pipe 10 are located in the upper space 14 .

[0038] When the water-guided bearing assembly of the water turbine is working, a friction pair is formed between the bearing surface of the bearing 5 and the main shaft 1. The friction pair is lubricated and cooled by lubricating oil. The oil pan and oil circuit for storing the lubricating oil are generally as follows: the rotating oil pan 7 rotates with the main shaft 1, and the lubricating oil in it is introduced into the fixed oil pan 2 through the upper oil pipe 10. The lubricating oil in the fixed oil pan 2 flows back to the rotating oil pan 7 through the friction pair to form a lubricating oil circulation loop. In actual use, because the abrasive particles remaining in the water-guided bearing assembly or the abrasive particles generated on the friction pair in the case of poor lubrication may re-enter the friction pair with the lubricating oil circulation loop, the abrasive particles will cause the bearing surface and the main shaft 1 to suffer serious wear damage. In view of the problem of the abrasive particles, the prior art proposes a solution of setting a filtering device at the inlet end of the upper oil pipe 10, but as the abrasive particles are enriched in the filtering device and the abrasive particles are not processed in time, the fixed oil pan 2 will be insufficiently oiled, which seriously affects the amount of lubricating oil entering the friction pair, and finally leads to insufficient lubrication and insufficient cooling of the friction pair. Based on the above, this solution provides the above turbine water guide bearing assembly.

[0039] During specific use of the present solution, the amount of lubricating oil in the rotating oil basin 7 is set so that the liquid level is higher than the inlet of the upper oil pipe 10, so as to ensure that the lubricating oil in the rotating oil basin 7 can smoothly enter the fixed oil basin 2 through the upper oil pipe 10, so that there is enough lubricating oil in the fixed oil basin 2 to provide lubrication and cooling functions for the friction pair. Unlike the prior art, the space of the rotating oil basin 7 is divided into an upper space 14 and a lower space 15 by the partition 8. In this way, when the abrasive particles enter the upper space 14 from the gap between the bearing 5 and the main shaft 1, these abrasive particles can fall into the lower space 15 through the through holes on the partition 8, so that these abrasive particles no longer move with the lubricating oil circulation loop and enter the friction pair again, thereby achieving the isolation of the abrasive particles relative to the lubricating oil circulation loop. At the same time, compared with setting a filtering device for intercepting abrasive particles at the inlet end of the upper oil pipe 10, the abrasive particles retained in the lower space 15 do not affect the resistance during the circulation of the lubricating oil. Therefore, the present solution also has the characteristic of reducing the influence of abrasive particles on the normal operation of the oil circuit.

[0040] In specific applications, for the rotating oil pan 7 that is set on the main shaft 1 through the annular protrusion on the main shaft 1, the difference between the rotating oil pan 7 and the existing oil pan is that the partition 8 is set in the rotating oil pan 7; for the rotating oil pan 7 that is set on the main shaft 1 through the shaft collar on the main shaft 1, in order to have enough space in the rotating oil pan 7 to store lubricating oil, the shaft collar is a component of the rotating oil pan 7. In such an application, the through hole can be drilled on the bottom plate of the shaft collar, that is, the bottom plate serves as the partition 8, and the space above the bottom plate serves as the upper space 14, and a lower cylinder is set at the lower end of the bottom plate to form the lower space 15.

[0041] Embodiment 2:

[0042] This embodiment is further refined on the basis of embodiment 1:

[0043] In order to make the abrasive particles have a greater probability of falling into the lower space 15 through the through holes, the partition 8 is a mesh plate having multiple through holes thereon. Preferably, the mesh plate is a structure with mesh holes evenly arranged at various positions on the surface of the partition 8, and the mesh holes are the through holes. The mesh plate can be a flat mesh plate or a wire mesh plate.

[0044] Embodiment 3:

[0045] This embodiment is further refined on the basis of embodiment 1:

[0046] When the water-guided bearing assembly is in operation, the lubricating oil absorbs heat when passing through the friction pair, and the lubricating oil in the rotating oil basin 7 has a relatively high temperature. At the same time, in the prior art, a cooler 11 connected in series to the upper oil pipe 10 and externally arranged relative to the fixed oil basin 2 is generally used to cool the lubricating oil from the rotating oil basin 7, so that the lubricating oil that enters the fixed oil basin 2 and flows through the friction pair again has a relatively low temperature, so as to achieve good lubrication and cooling effects. At the same time, in the prior art, water cooling is mostly used to cool the lubricating oil, that is, water as a cold fluid is introduced into the cooler 11 through a water circulation structure, and the water and the lubricating oil reduce the temperature of the lubricating oil through a partition heat exchange method, but In actual use, due to the relatively complex water circulation structure, there are many fault points. For example, when the water supply is insufficient or the hot and cold processes of the cooler 11 are turned on, it will cause insufficient cooling and heat dissipation capacity of the friction pair, and eventually there will be problems of burning tiles and oil overflow. Based on this problem, the following air-cooled cooler 11 is further provided: it also includes a cooler 11 connected in series on the upper oil pipe 10 and located outside the fixed oil pan 2, the cooler 11 includes an oil tank 17, an air duct 18 and a blower, the oil tank 17 is connected in series on the upper oil pipe 10, there are multiple air ducts 18, each air duct 18 passes through the oil tank 17, and the inlet end of each air duct 18 is located in the air outlet hood 16 of the blower. When this solution is used in practice, the lubricating oil is the shell-side fluid, that is, it flows through the space outside the air duct 18 in the oil tank 17, and the wind generated by the blower is used as the cold fluid and as the tube-side fluid, that is, it flows through the air duct 18, and the wall of the air duct 18 is used as the heat exchange wall between the wind and the lubricating oil. Different from the existing lubricating oil water cooling solution, the source of the cold fluid in this solution is only the blower, and the flow path of the wind only includes the air outlet hood 16 and the air duct 18, so the cold fluid source has an extremely low failure rate; at the same time, even if the heat exchange wall isolation fails, after the gas enters the fixed oil basin 2 under the wind pressure, compared with the oil-water mixture formed by the cooling water mixed with the lubricating oil, these gases will not cause a significant reduction in the lubrication performance of the fluid entering the friction pair, so this solution can effectively ensure the reliability of the operation of the water-guided bearing assembly. In specific use, the air outlet hood 16 is a conical cylindrical structure, with its small end serving as the inlet end and connected to the outlet of the blower, and the large end being sealed and connected to the side wall of the oil tank 17. The inlet end of each air duct 18 extends into the air outlet hood 16, and the connection and sealing between the air duct 18 and the wall of the oil tank 17 are achieved by strength expansion. The outlet end of the air duct 18 is exposed to the outside of the cooler 11, so that the inner wall of the air duct 18 during operation can be cleaned at any time through the outlet end of the air duct 18, and the air duct 18 is made of copper tube.

[0047] Embodiment 4:

[0048] This embodiment is further refined on the basis of Embodiment 3:

[0049] As a specific implementation and arrangement form of the oil tank 17, the oil tank 17 is a bedroom container and is supported on the bearing frame 4, and the air duct 18 is parallel to the axis of the oil tank 17;

[0050] The two interfaces on the oil tank 17 for connecting with the upper oil pipe 10 are located in the middle or upper part of the oil tank 17; one interface is located on the left side of the oil tank 17, and the other interface is located on the right side of the oil tank 17;

[0051] The oil tank 17 further includes a baffle 19 disposed in the oil tank 17, the baffle 19 being centrally disposed in the left-right direction of the oil tank 17, the baffle 19 dividing the internal space of the oil tank 17 into a left chamber and a right chamber, the left chamber and the right chamber being connected to each other through the space below the baffle 19;

[0052] The left chamber and the right chamber each have an air duct 18 passing through each of them. In this solution, each air duct 18 extends along the axis of the oil tank 17, and the oil inlet position and the oil outlet position of the oil tank 17 are located in the middle or upper part of the oil tank 17 and on a pair of opposite sides of the oil tank 17. In this way, the oil tank 17 not only provides a lubricating oil storage function to strengthen the cooling effect of the air duct 18 on it, but also a baffle 19 is set between the oil inlet position and the oil outlet position. The baffle 19 can make the lubricating oil entering the oil tank 17 have a U-shaped flow on the cross section of the oil tank 17, and make the lubricating oil with a lower temperature on the oil inlet position side pass through the space under the baffle 19 after sedimentation and then enter the oil outlet position side, and enter the fixed oil basin 2 through the upper oil pipe 10 after being cooled down again on the oil outlet position side. The lubricating oil storage function and path restriction function provided by this solution can effectively ensure the cooling effect of the cooler 11 on the lubricating oil.

[0053] Embodiment 5:

[0054] This embodiment is further refined on the basis of Embodiment 4:

[0055] Since the oil tank 17 has the function of storing lubricating oil, smaller abrasive particles may be deposited on the bottom side of the oil tank 17 and the outer wall of the air duct 18. In order to facilitate the cleaning of the inside of the oil tank 17, a discharge hole is provided at the bottom of the oil tank 17, and a flushing hole is provided at the top of the oil tank 17. In specific use, the discharge hole and the flushing hole can be a channel drilled on the wall of the oil tank 17, or a pipe hole connected to the pipe on the wall of the oil tank 17. When it is a pipe hole, a valve can be used for blocking, and when it is a channel, a plug 9 can be used for blocking. When it is necessary to clean the sediment, the discharge hole is opened to discharge the lubricating oil, and then the cleaning agent or flushing agent is injected through the flushing hole. During this process, the discharge hole can be in an open state to discharge the flushing agent at any time, or it can be in a closed state to use the cleaning agent to soak the sediment for a period of time before discharging, and then the oil tank 17 is dried.

[0056] Embodiment 6:

[0057] This embodiment is further refined on the basis of Embodiment 3:

[0058] In order to further ensure the quality of the lubricating oil entering the fixed oil basin 2, a filter 13 is connected in series to the upper oil pipe 10 between the cooler 11 and the fixed oil basin 2. In this solution, the lubricating oil entering the filter 13 has been settled in the rotating oil basin 7 and in the oil tank 17, so the filter 13 is used to filter the abrasive particles with smaller particle size in the lubricating oil to ensure the quality of the lubricating oil entering the fixed oil basin 2. At the same time, since the abrasive content of the lubricating oil here is very small, it is not easy to affect the lubricating oil due to blockage.

[0059] Embodiment 7:

[0060] This embodiment is further refined on the basis of Embodiment 3:

[0061] In order to prevent the upper oil pipe 10 from expanding and contracting due to temperature changes, which may cause the corresponding joint seal to fail and affect the lubrication of the lubricating oil, a bellows is connected in series to the upper oil pipe 10 between the cooler 11 and the rotating oil pan 7 .

[0062] Embodiment 8:

[0063] This embodiment is further refined on the basis of embodiment 1:

[0064] In order to effectively seal the gap formed between the rotating oil pan 7 and the bearing shell 5 and compensate the pressure of the corresponding contact surface after the packing is worn, a packing seat is arranged on the top of the rotating oil pan 7. The inner side of the packing seat and the outer side of the bearing shell 5 form a packing filling space, which also includes the packing filled in the packing filling space and the packing pressure plate bolted to the top surface of the packing seat.

[0065] Embodiment 9:

[0066] This embodiment is further refined on the basis of embodiment 1:

[0067] In order to facilitate the installation and maintenance of the bearing 5 and to make the bearing surface of the bearing 5 have good wear resistance, the bearing 5 is a split structure including multiple single pieces. The single pieces forming the bearing 5 are connected by bolts, and the inner side of each single piece is provided with a bearing surface layer 6 providing a wear-resistant bearing surface.

[0068] In order to ensure the rigidity and strength of each component of the water-guided bearing assembly, the bearing frame 4, the fixed oil pan 2, and the rotating oil pan 7 are all made of ZG20SiMn or Q345B. In order to make the tile surface layer 6 have stable characteristics at high temperatures, the material of the tile surface layer 6 is Babbitt alloy.

[0069] The side wall of the lower space 15 is provided with an injection hole and a drainage hole, which have the same function as the discharge hole and the flushing hole provided on the oil tank 17. In this solution, the injection hole and the drainage hole are used to clean the lower space 15 when the turbine is shut down. In specific use, in order to optimize the force of the rotating oil pan 7 and reduce its rotation radius, the injection hole and the drainage hole are blocked with a plug 9 during the operation of the water guide bearing assembly.

[0070] Embodiment 10:

[0071] This embodiment provides a water turbine based on the embodiment 1, which is a specific application of the water-guided bearing assembly described in the embodiment 1, including a main shaft 1 and a water-guided bearing assembly, wherein the water-guided bearing assembly is the water-guided bearing assembly described in the embodiment 1, wherein:

[0072] The bearing frame 4 is arranged on the outer periphery of the main shaft 1, and the bearing bush 5 is fixed on the bearing frame 4 and matched with the main shaft 1;

[0073] The fixed oil pan 2 is fixed on the bearing frame 4, and the gap between the upper end of the bearing bush 5 and the main shaft 1 is connected to the fixed oil pan 2;

[0074] The lower end of the rotating oil pan 7 is fixed on the main shaft 1 , and the upper end of the rotating oil pan 7 is rotatably matched with the bearing bush 5 . The gap between the lower end of the bearing bush 5 and the main shaft 1 is communicated with the upper space 14 of the rotating oil pan 7 .

[0075] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments derived without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-guided bearing assembly for a water turbine, comprising a bearing frame (4), a bearing bush (5) fixed to the bearing frame (4), a fixed oil pan (2), a rotating oil pan (7) rotatably matched with the bearing bush (5), and an upper oil pipe (10) connecting the fixed oil pan (2) and the rotating oil pan (7), characterized in that: A partition (8) is arranged in the rotating oil basin (7), and the partition (8) divides the space enclosed by the rotating oil basin (7) and the main shaft (1) into an upper space (14) and a lower space (15); the partition (8) is provided with a central hole for the main shaft (1) to pass through the partition (8), and the partition (8) is provided with a through hole for abrasive particles to fall from the upper space (14) to the lower space (15); The rotating oil pan (7), the bearing bush (5) and the upper oil pipe (10) can be assembled such that the lower end of the bearing bush (5) and the inlet end of the upper oil pipe (10) are located in the upper space (14).

2. The water turbine water guide bearing assembly according to claim 1, characterized in that: The partition plate (8) is a mesh plate having a plurality of through holes thereon.

3. The water turbine water guide bearing assembly according to claim 1, characterized in that: It also includes a cooler (11) connected in series to the upper oil pipe (10) and located outside the fixed oil pan (2), the cooler (11) including an oil tank (17), an air duct (18) and a blower, the oil tank (17) being connected in series to the upper oil pipe (10), the air duct (18) being a plurality, each of which passes through the oil tank (17), and the inlet end of each of which is located in the air outlet hood (16) of the blower.

4. The water turbine water guide bearing assembly according to claim 3, characterized in that: The oil tank (17) is a bedroom container and is supported on the bearing frame (4), and the air duct (18) is parallel to the axis of the oil tank (17); The two interfaces on the oil tank (17) for connecting with the upper oil pipe (10) are located in the middle or upper part of the oil tank (17); one of the interfaces is located on the left side of the oil tank (17), and the other interface is located on the right side of the oil tank (17); It also includes a baffle (19) disposed in the oil tank (17), the baffle (19) being centrally disposed in the left-right direction of the oil tank (17), the baffle (19) dividing the internal space of the oil tank (17) into a left chamber and a right chamber, the left chamber and the right chamber being in communication with each other through a space below the baffle (19); The left chamber and the right chamber each have an air duct (18) passing through them.

5. The water turbine water guide bearing assembly according to claim 4, characterized in that: The bottom of the oil tank (17) is provided with a discharge hole, and the top of the oil tank (17) is provided with a flushing hole.

6. The water turbine water guide bearing assembly according to claim 3, characterized in that: A filter (13) is connected in series on the upper oil pipe (10) between the cooler (11) and the fixed oil pan (2).

7. The water turbine water guide bearing assembly according to claim 3, characterized in that: A corrugated pipe is connected in series on the upper oil pipe (10) between the cooler (11) and the rotating oil pan (7).

8. The water turbine water guide bearing assembly according to claim 1, characterized in that: A packing seat is arranged on the top of the rotating oil pan (7), the inner side of the packing seat and the outer side of the bearing bush (5) enclose a packing filling space, and also includes packing filled in the packing filling space, and also includes a packing pressure plate bolted to the top surface of the packing seat; The bearing bush (5) is a split structure including a plurality of single pieces, the single pieces forming the bearing bush (5) are connected by bolts, and a bush surface layer (6) providing a wear-resistant bush surface is arranged on the inner side of each single piece; The bearing frame (4), the fixed oil basin (2) and the rotating oil basin (7) are all made of ZG20SiMn or Q345B, and the tile surface layer (6) is made of Babbitt alloy.

9. The water turbine water guide bearing assembly according to any one of claims 1 to 8, characterized in that: An injection hole and a discharge hole are arranged on the side wall of the lower space (15).

10. A water turbine comprising a main shaft (1) and a water-guided bearing assembly, characterized in that: The water-guided bearing assembly is a water-guided bearing assembly according to any one of claims 1 to 9, wherein: The bearing frame (4) is arranged on the outer periphery of the main shaft (1), and the bearing bush (5) is fixed on the bearing frame (4) and matched with the main shaft (1); The fixed oil pan (2) is fixed on the bearing frame (4), and the gap between the upper end of the bearing bush (5) and the main shaft (1) is connected to the fixed oil pan (2); The lower end of the rotating oil pan (7) is fixed on the main shaft (1), the upper end of the rotating oil pan (7) is rotatably matched with the bearing bush (5), and the gap between the lower end of the bearing bush (5) and the main shaft (1) is communicated with the upper space (14) of the rotating oil pan (7).

Images