Water turbine generator bearing oil external circulation device

Abstract

The utility model relates to a kind of water turbine generator bearing oil external circulation device. Water turbine generator bearing oil external circulation device includes oil return ring pipe, multiple oil return branch pipes, oil return main pipe, oil inlet ring pipe, multiple one end closed oil injection pipe and oil inlet main pipe, when using, hot lubricating oil in bearing groove enters oil return ring pipe by multiple oil return branch pipes, and enters into thin oil station by oil return main pipe, cold lubricating oil after cooling by thin oil station enters multiple oil injection pipe by oil inlet main pipe and oil inlet ring pipe in turn, cold lubricating oil in oil injection pipe is sprayed out by oil injection port, enters bushing surface by oil inlet edge of bushing, cancels oil cooler in bearing oil groove, so that there is no water inlet risk in bearing oil groove. The oil inlet and outlet path of lubricating oil is clear, and the cooling effect is better. The above-mentioned water turbine generator bearing oil external circulation device has no risk of water inlet in oil groove, improves the safety and reliability of bearing operation, and has higher lubricating oil cooling effect and higher installation and maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the field of hydro-generator technology, and in particular to a hydro-generator bearing oil external circulation device. Background Technology

[0002] Cooling the lubricating oil is crucial for ensuring the normal operation of hydro-generator bearings. The heat generated on the bearing surface is carried away by the lubricating oil, so the hot oil must be reliably cooled; otherwise, bearing failure can easily occur. Therefore, for units of different capacities, the design and selection of the oil cooling method directly determines the stability and reliability of the unit, as well as the lubrication effect and bearing temperature. A reasonable pipeline layout also facilitates installation and maintenance.

[0003] Traditional bearing oil cooling circulation methods mostly employ internal circulation, where an oil cooler is installed within the oil sump. The hot oil lubricating the bearing is cooled by the oil cooler before re-entering the bearing. Therefore, this internal circulation method has limited cooling efficiency and is only suitable for small to medium-sized units. Furthermore, if the oil cooler leaks, water entering the oil sump can be agitated and enter the bearing surface, potentially causing bearing failure. Thus, traditional internal oil circulation methods pose safety hazards. Additionally, to ensure cooling efficiency, the oil cooler must be large, which complicates installation and maintenance. Utility Model Content

[0004] Therefore, it is necessary to provide a hydro-generator bearing oil external circulation device that can improve the cooling capacity of lubricating oil, prevent water from entering the bearing oil sump and causing bearing failure, and is easy to install and maintain.

[0005] A hydro-generator bearing oil external circulation device, comprising:

[0006] The oil return ring pipe has multiple sub-oil return ports spaced apart circumferentially; the side wall of the oil return ring pipe has a main oil return port.

[0007] Multiple oil return pipes are provided, with one end of each pipe connected to a corresponding sub-oil return port; each oil return pipe is configured such that its other end is located in the bearing oil groove.

[0008] The main oil return pipe has one end connected to the main oil return port; the other end of the main oil return pipe is located outside the bearing oil sump and is used to connect to the oil inlet of the external thin oil station.

[0009] An oil inlet ring pipe is located inside the oil return ring pipe; the oil inlet ring pipe is provided with multiple sub-oil inlets spaced apart circumferentially; a main oil inlet is provided on the side wall of the oil inlet ring pipe;

[0010] Multiple fuel injection pipes, each closed at one end, have their open ends connected to one of the multiple sub-return ports; each fuel injection pipe has a fuel injection port formed on its sidewall; each fuel injection pipe is configured to align the fuel injection port with the oil inlet edge of the corresponding bearing.

[0011] The main oil inlet pipe has one end connected to the main oil inlet and the other end located outside the bearing oil trough, and is used to connect to the oil outlet of the external thin oil station.

[0012] In one embodiment, a return oil funnel corresponding to each of the return oil branch pipes is also included; the small end of the return oil funnel is connected to the end of the corresponding return oil branch pipe away from the return oil ring pipe, and the large end of the return oil funnel is open upwards.

[0013] In one embodiment, the oil return funnel is a pre-assembled component in the factory.

[0014] In one embodiment, the return oil ring is configured to be installed within the bearing oil groove.

[0015] In one embodiment, the main return oil pipe includes a first return oil pipe section with a first flange at one end and a second return oil pipe section with a second flange at one end; the end of the first return oil pipe section away from the first flange is fixed and connected to the main return oil port; the first flange and the second flange are detachably connected; the second flange is configured to be fixed to the inner wall of the bearing oil groove; the end of the second return oil pipe section away from the second flange is used to connect to the oil inlet of the thin oil station.

[0016] In one embodiment, each of the oil injection pipes is provided with a plurality of oil injection ports spaced apart along its axial direction; each of the oil injection ports is used to align with the oil inlet edge of the corresponding bearing bush.

[0017] In one embodiment, the open end of each of the fuel injection pipes is connected to the corresponding sub-inlet via an inlet branch pipe.

[0018] In one embodiment, both the oil inlet branch pipe and the oil injection pipe are pre-assembled components at the factory.

[0019] In one embodiment, the main oil inlet pipe includes a first oil inlet pipe section with a third flange at one end and a second oil inlet pipe section with a fourth flange at one end; the end of the first oil inlet pipe section away from the third flange is connected to the main oil inlet; the third flange and the fourth flange are detachably connected, and the fourth flange is configured to be fixed to the inner wall of the bearing oil groove; the end of the second oil inlet pipe section away from the fourth flange is used to connect to the oil outlet of the thin oil station.

[0020] In the aforementioned external circulation device for hydro-generator bearing oil, hot lubricating oil in the bearing groove enters the return oil ring pipe through multiple return oil branch pipes, and then enters the thin oil station through the return oil main pipe. The cooled lubricating oil in the thin oil station then enters multiple oil injection pipes through the oil inlet main pipe and the oil inlet ring pipe. The cooled lubricating oil in the injection pipes is sprayed out through the injection nozzles and enters the bearing surface through the oil inlet edge of the bearing bush. Clearly, this external circulation device for hydro-generator bearing oil eliminates the oil cooler in the bearing oil groove, eliminating the risk of water ingress and improving the safety and reliability of bearing operation. Furthermore, the clear oil inlet and outlet paths result in better cooling. Therefore, this external circulation device for hydro-generator bearing oil eliminates the risk of water ingress into the bearing oil groove, improves the safety and reliability of bearing operation, and also provides high lubricating oil cooling effect and high ease of installation and maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external circulation device for the bearing oil of the hydro-generator in a preferred embodiment of the present invention;

[0022] Figure 2 for Figure 1 The diagram shows a partial sectional view (AA) of the external circulation device for the bearing oil of the hydro-generator.

[0023] The reference numerals in the attached drawings are as follows: 100, external circulation device for hydro-generator bearing oil; 110, return oil ring pipe; 120, return oil branch pipe; 130, return oil main pipe; 131, first flange; 132, first return oil pipe section; 133, second flange; 134, second return oil pipe section; 140, inlet ring pipe; 150, oil injection pipe; 151, oil injection port; 160, inlet main pipe; 161, third flange; 162, first inlet pipe section; 163, fourth flange; 164, second inlet pipe section; 170, return oil funnel; 180, inlet branch pipe; 10, bearing oil groove; 20, bearing shell. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0027] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0028] Figure 1 The diagram illustrates the structure of an external circulation device for the bearing oil of a hydro-generator according to one embodiment of the present invention. For ease of explanation, the accompanying drawings only show structures relevant to the embodiment of the present invention.

[0029] Please see Figure 1 and Figure 2 The preferred embodiment of the present invention includes a hydro-generator bearing oil external circulation device 100, which includes an oil return ring pipe 110, multiple oil return branch pipes 120, an oil return main pipe 130, an oil inlet ring pipe 140, multiple oil injection pipes 150 with one end closed, and an oil inlet main pipe 160.

[0030] The return oil ring pipe 110 has multiple sub-return oil ports (not shown) spaced apart circumferentially. A main return oil port (not shown) is formed on the side wall of the return oil ring pipe 110. Specifically, the multiple sub-return oil ports are located on the inner side of the return oil ring pipe 110, and the main return oil port is located on the outer side of the return oil ring pipe 110. Of course, in other embodiments, the sub-return oil ports and the main return oil port can also be located at the top or bottom of the return oil ring pipe 110, etc.

[0031] One end of each of the multiple oil return branch pipes 120 is connected to a corresponding sub-oil return port. Each oil return branch pipe 120 is configured such that its other end is located within the bearing oil groove 10. That is, the end of the oil return branch pipe 120 away from the sub-oil return port is located within the bearing oil groove 10, so as to facilitate the hot lubricating oil in the bearing oil groove 10 to enter the oil return ring pipe 110 along the oil return branch pipe 120.

[0032] One end of the return oil main pipe 130 is connected to the main return oil port. The other end of the return oil main pipe 130 is located outside the bearing oil sump 10 and is used to connect to the oil inlet of the external thin oil station.

[0033] The inlet ring pipe 140 is located inside the return ring pipe 110. That is, the bending radius of the inlet ring pipe 140 is smaller than that of the return ring pipe 110. The inlet ring pipe 140 and the return ring pipe 110 can be at the same or different heights. The inlet ring pipe 140 has multiple sub-inlets (not shown) spaced apart circumferentially. A main inlet (not shown) is formed on the side wall of the inlet ring pipe 140. Specifically, the sub-inlets are located inside the inlet ring pipe 140, and the main inlet is located outside the inlet ring pipe 140. Of course, in other embodiments, the sub-inlets and the main inlet can also be located at the top or bottom of the inlet ring pipe 140.

[0034] The open ends of multiple fuel injection pipes 150 are respectively connected to multiple sub-fuel return ports. Each fuel injection pipe 150 has a fuel injection port 151 formed on its side wall. Each fuel injection pipe 150 is configured to align the fuel injection port 151 with the oil inlet edge of the corresponding bearing 20.

[0035] One end of the oil inlet manifold 160 is connected to the main oil inlet, and the other end is located outside the bearing oil trough 10 and is used to connect to the oil outlet of the external thin oil station.

[0036] In the aforementioned external circulation device 100 for hydro-generator bearing oil, hot lubricating oil in the bearing groove enters the return oil ring pipe 110 through multiple return oil branch pipes 120, and then enters the thin oil station through the return oil main pipe 130. The cooled lubricating oil, after being cooled by the thin oil station, sequentially enters multiple oil spray pipes 150 through the oil inlet main pipe 160 and the oil inlet ring pipe 140. The cold lubricating oil in the oil spray pipes 150 is sprayed out through the oil spray nozzles 151 and enters the bearing surface through the oil inlet edge of the bearing shell 20. Clearly, the aforementioned external circulation device 100 for hydro-generator bearing oil eliminates the oil cooler in the bearing oil groove 10, eliminating the risk of water ingress into the bearing oil groove 10 and improving the safety and reliability of bearing operation. Furthermore, the clear oil inlet and outlet paths result in better cooling. Therefore, the aforementioned external circulation device 100 for hydro-generator bearing oil eliminates the risk of water ingress into the bearing oil groove 10, improves the safety and reliability of bearing operation, and also provides high lubricating oil cooling effect and high ease of installation and maintenance.

[0037] In some embodiments, the external circulation device 100 for the bearing oil of the hydro-generator further includes an oil return funnel 170 corresponding to each oil return branch pipe 120. The small end of the oil return funnel 170 is connected to the end of the corresponding oil return branch pipe 120 away from the oil return ring pipe 110, and the large end of the oil return funnel 170 is open upwards. The oil return funnel 170 is provided to facilitate faster collection of hot lubricating oil in the bearing oil groove 10 into the oil return branch pipe 120, thereby increasing the cooling circulation speed of the lubricating oil and further improving the cooling effect of the bearing lubricating oil.

[0038] In some embodiments, the oil return funnel 170 is a pre-assembled component at the factory. It should be noted that a pre-assembled component refers to a part that needs to be installed in the factory. Therefore, the oil return funnel 170 needs to be installed in the factory to avoid mixing during on-site assembly.

[0039] In some embodiments, the return oil ring pipe 110 is configured to be installed within the bearing oil groove 10. Thus, since both the return oil ring pipe 110 and the plurality of return oil branch pipes 120 are located within the bearing oil groove 10, only one hole needs to be formed on the side wall of the bearing oil groove 10 for the return oil main pipe 130 to pass through. Compared to forming multiple holes in the bearing oil groove 10 for each of the multiple return oil branch pipes 120 to pass through, the method of placing the return oil ring pipe 110 within the bearing oil groove 10 reduces the probability of oil leakage from the bearing oil groove 10.

[0040] In some embodiments, the return oil main 130 includes a first return oil pipe section 132 with a first flange 131 at one end and a second return oil pipe section 134 with a second flange 133 at one end. The end of the first return oil pipe section 132 away from the first flange 131 is fixed and communicates with the main return oil port. The first flange 131 and the second flange 133 are detachably connected. The second flange 133 is configured to be fixed to the inner wall of the bearing oil groove 10. The end of the second return oil pipe section 134 away from the second flange 133 is used to communicate with the oil inlet of the thin oil station.

[0041] Thus, during the assembly of the above-mentioned external circulation device 100 for hydro-generator bearing oil, the second return oil pipe section 134 is inserted into and fixed in the hole opened on the side wall of the bearing oil groove 10, and the side of the second flange 133 facing away from the first flange 131 is fitted or sealed with the inner wall of the bearing oil groove 10 to improve the sealing performance between the return oil main pipe 130 and the side wall of the bearing oil groove 10. The detachable connection between the first flange 131 and the second flange 133 further facilitates the installation and maintenance of the external circulation device 100 for hydro-generator bearing oil.

[0042] In some embodiments, each oil injection pipe 150 is provided with a plurality of oil injection ports 151 spaced apart along its axial direction. Each oil injection port 151 is used to align with the oil inlet edge of the corresponding bearing bush 20. The provision of a plurality of oil injection ports 151 on each oil injection pipe 150 allows for more uniform spraying of cold lubricating oil onto the oil inlet edge of the bearing bush 20, thereby further improving the safety and stability of bearing operation.

[0043] In some embodiments, the open end of each injection pipe 150 is connected to the corresponding sub-inlet via an inlet branch pipe 180. The inlet branch pipe 180 allows for greater freedom in the distance and relative position between the inlet ring pipe 140 and the injection pipe 150, significantly reducing the restriction on the installation position of the inlet ring pipe 140 by the inlet pipe, and making the installation and maintenance of the inlet ring pipe 140 simpler and more convenient.

[0044] Furthermore, in some embodiments, the oil inlet branch pipe 180 and the fuel injection pipe 150 are both pre-installed components at the factory. The meaning of "pre-installed component at the factory" is the same as when the return funnel 170 is set as a pre-installed component at the factory, and will not be repeated here. Therefore, both the oil inlet branch pipe 180 and the fuel injection pipe 150 need to be installed at the factory to avoid mixing during on-site assembly.

[0045] In some embodiments, the main oil inlet pipe 160 includes a first oil inlet pipe section 162 with a third flange 161 at one end and a second oil inlet pipe section 164 with a fourth flange 163 at one end. The end of the first oil inlet pipe section 162 away from the third flange 161 is connected to the main oil inlet. The third flange 161 and the fourth flange 163 are detachably connected, and the fourth flange 163 is configured to be fixed to the inner wall of the bearing oil groove 10. The end of the second oil inlet pipe section 164 away from the fourth flange 163 is used to connect to the oil outlet of the thin oil station.

[0046] Thus, during the assembly of the above-mentioned external circulation device 100 for hydro-generator bearing oil, the second oil inlet pipe section 164 is inserted into and fixed in the hole opened on the side wall of the bearing oil groove 10, and the side of the fourth flange 163 facing away from the third flange 161 is fitted or sealed with the inner wall of the bearing oil groove 10 to improve the sealing performance between the main oil inlet pipe 160 and the side wall of the bearing oil groove 10. The detachable connection between the third flange 161 and the fourth flange 163 further facilitates the installation and maintenance of the external circulation device 100 for hydro-generator bearing oil.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A bearing oil external circulation device for a hydro-generator, characterized in that, include: The oil return ring pipe has multiple sub-oil return ports spaced apart circumferentially; the side wall of the oil return ring pipe has a main oil return port. Multiple oil return pipes are provided, with one end of each pipe connected to a corresponding sub-oil return port; each oil return pipe is configured such that its other end is located in the bearing oil groove. The main oil return pipe has one end connected to the main oil return port; the other end of the main oil return pipe is located outside the bearing oil sump and is used to connect to the oil inlet of the external thin oil station. An oil inlet ring pipe is located inside the oil return ring pipe; the oil inlet ring pipe is provided with multiple sub-oil inlets spaced apart circumferentially; a main oil inlet is provided on the side wall of the oil inlet ring pipe; Multiple fuel injection pipes, each closed at one end, have their open ends connected to one of the multiple sub-return ports; each fuel injection pipe has a fuel injection port formed on its sidewall; each fuel injection pipe is configured to align the fuel injection port with the oil inlet edge of the corresponding bearing. The main oil inlet pipe has one end connected to the main oil inlet and the other end located outside the bearing oil trough, and is used to connect to the oil outlet of the external thin oil station.

2. The external circulation device for bearing oil of a hydro-generator according to claim 1, characterized in that, It also includes a return oil funnel corresponding to each of the return oil distribution pipes; the small end of the return oil funnel is connected to the end of the corresponding return oil distribution pipe away from the return oil ring pipe, and the large end of the return oil funnel is open upwards.

3. The external circulation device for bearing oil of a hydro-generator according to claim 2, characterized in that, The oil return funnel is a pre-assembled component in the factory.

4. The external circulation device for bearing oil of a hydro-generator according to claim 1, characterized in that, The return oil ring pipe is configured to be installed inside the bearing oil groove.

5. The external circulation device for bearing oil of a hydro-generator according to claim 1, characterized in that, The main return oil pipe includes a first return oil pipe section with a first flange at one end and a second return oil pipe section with a second flange at one end; the end of the first return oil pipe section away from the first flange is fixed and connected to the main return oil port; the first flange and the second flange are detachably connected; the second flange is configured to be fixed on the inner wall of the bearing oil groove; the end of the second return oil pipe section away from the second flange is used to connect to the oil inlet of the thin oil station.

6. The external circulation device for bearing oil of a hydro-generator according to claim 1, characterized in that, Each of the oil injection pipes has a plurality of oil injection ports spaced apart along its axial direction; each oil injection port is used to align with the oil inlet edge of the corresponding bearing bush.

7. The external circulation device for bearing oil of a hydro-generator according to claim 1, characterized in that, The open end of each of the fuel injection pipes is connected to the corresponding sub-inlet via an inlet branch pipe.

8. The external circulation device for bearing oil of a hydro-generator according to claim 7, characterized in that, Both the oil inlet branch pipe and the oil injection pipe are pre-assembled parts in the factory.

9. The external circulation device for bearing oil of a hydro-generator according to claim 1, characterized in that, The main oil inlet pipe includes a first oil inlet pipe section with a third flange at one end and a second oil inlet pipe section with a fourth flange at one end; the end of the first oil inlet pipe section away from the third flange is connected to the main oil inlet; the third flange and the fourth flange are detachably connected, and the fourth flange is configured to be fixed on the inner wall of the bearing oil groove; the end of the second oil inlet pipe section away from the fourth flange is used to connect to the oil outlet of the thin oil station.

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