Turbine bearing lubricating system

Abstract

The utility model belongs to the field of turbines and provides a turbine bearing lubricating system which comprises an oil pump, a bearing box and a circulating assembly. Wherein the oil pump is in transmission connection with a target steam turbine main shaft and can be directly driven by the steam turbine main shaft; the bearing box forms a bearing cavity used for containing a steam turbine bearing, the circulating assembly comprises a cooler used for cooling a target lubricating medium and further comprises a plurality of first pipelines, second pipelines and third pipelines, the first pipelines communicate with the bearing cavity and the cooler, the second pipelines communicate with the cooler and the oil pump, and the third pipelines communicate with the bearing cavity. The third pipeline is communicated with the oil pump and the bearing cavity, and the bearing box, the cooler, the first pipeline, the second pipeline and the third pipeline are jointly used as a storage container of the lubricating medium.

Description

Technical Field

[0001] This application belongs to the field of steam turbines, and in particular relates to a steam turbine bearing lubrication system. Background Technology

[0002] Traditional steam turbine lubrication systems typically require a separate pressurized oil system. This system consists of an independently driven oil pump, a large oil tank, and complex piping, resulting in a large footprint, high operating costs, and complex maintenance. In projects with limited space or tight budgets, traditional systems are not economically viable. Therefore, it is necessary to address these technical issues. Utility Model Content

[0003] The purpose of this application is to provide a turbine bearing lubrication system to solve the technical problem of high operating costs of existing turbine lubrication oil systems.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a turbine bearing lubrication system, comprising:

[0005] The oil pump is connected to the main shaft of the target steam turbine and can be directly driven by the main shaft of the steam turbine.

[0006] The bearing housing forms the bearing cavity used to house the turbine bearings.

[0007] The circulation assembly includes a cooler for cooling a target lubricating medium, and also includes a plurality of first pipes, second pipes and third pipes, wherein the first pipes connect the bearing housing and the cooler, the second pipes connect the cooler and the oil pump, and the third pipes connect the oil pump and the bearing housing, wherein the bearing housing, the cooler, the first pipes, the second pipes and the third pipes together serve as a storage container for the lubricating medium.

[0008] Optionally, the circulation assembly further includes an inlet pipe and an outlet pipe connected to the cooler for conveying the cooling medium;

[0009] The output pipe passes through the bearing housing, and the bearing housing forms a cooling channel within the bearing cavity that communicates with the output pipe.

[0010] Optionally, the circulation assembly further includes an oil slinger ring for mounting on the turbine main shaft;

[0011] The oil slinger ring partially penetrates the bearing cavity and can rotate relative to the bearing housing along with the turbine main shaft.

[0012] Optionally, the circulation assembly further includes an oil reservoir and a liquid level maintainer;

[0013] The oil reservoir is connected to the bearing housing and is used to automatically replenish the lubricating medium in the bearing cavity. The liquid level maintainer is disposed inside the bearing cavity and is used to maintain a constant liquid level in the bearing cavity. The bearing cavity is connected to the first pipe through the outlet of the liquid level maintainer.

[0014] Optionally, the circulation assembly further includes branch pipes and pressure relief valves;

[0015] The two ends of the branch pipe are respectively connected to the second pipe and the third pipe. The pressure relief valve is installed on the branch pipe and can open when the pressure in the third pipe exceeds the target value.

[0016] Optionally, the circulation assembly further includes a filter capable of filtering impurities, the filter being disposed on the third pipe.

[0017] Optionally, the circulation assembly further includes a differential pressure gauge;

[0018] The differential pressure gauge is connected between the inlet and outlet of the filter and is used to measure the pressure difference across the filter.

[0019] Optionally, the circulation assembly further includes a pressure sensor and a pressure regulating valve with communication connections;

[0020] The pressure regulating valve is installed on the third pipe and is used to adjust the opening of the third pipe. The pressure sensor is installed on the third pipe and is used to detect the internal pressure of the third pipe.

[0021] Optionally, the circulation assembly further includes a pressure gauge disposed on the third pipe for direct observation of the internal pressure of the third pipe.

[0022] Optionally, the loop assembly further includes a transparent viewing mirror;

[0023] The observation mirror is connected to the first pipe and can reveal the internal working condition of the first pipe.

[0024] The beneficial effects of the turbine bearing lubrication system provided in this application are as follows: Compared with the prior art, in the turbine bearing lubrication system provided in this application, since the oil pump can be installed on the target turbine main shaft and can be directly driven by the turbine main shaft, the turbine bearing lubrication system in this embodiment can save the traditional drive mechanism such as a motor used to control the oil pump, and can also reduce the oil pump's dependence on electricity, thereby enabling the oil pump to operate more stably. In addition, since the lubrication medium circulation loop composed of the bearing housing, cooler, first pipe, second pipe and third pipe can jointly serve as a storage container for the lubrication medium, the turbine bearing lubrication system in this application can also save the need for a separately set oil tank. Thus, the turbine bearing lubrication system in this application can have a significantly lower operating cost than the lubrication systems in the prior art, and is far superior to the prior art. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the turbine bearing lubrication system in an embodiment of this application;

[0027] Figure 2 This is a partial structural diagram of the turbine bearing lubrication system in an embodiment of this application;

[0028] Figure 3 This is a partial three-dimensional view of the turbine bearing lubrication system in an embodiment of this application.

[0029] The reference numerals in the figures are as follows: 101, oil pump; 102, bearing housing; 103, bearing cavity; 104, cooler; 105, first pipe; 106, second pipe; 107, third pipe; 108, input pipe; 109, output pipe; 110, cooling channel; 111, oil slinger ring; 112, oil reservoir; 113, liquid level maintainer; 114, branch pipe; 115, pressure relief valve; 116, filter; 117, differential pressure gauge; 118, pressure sensor; 119, pressure regulating valve; 120, pressure gauge; 121, sight glass; 201, turbine main shaft; 202, turbine bearing. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] Please refer to the following: Figures 1 to 3 The present application provides a description of a turbine bearing lubrication system according to an embodiment. This turbine bearing lubrication system includes an oil pump 101, a bearing housing 102, and a circulation assembly. Wherein:

[0035] The oil pump 101 is driven to the main shaft 201 of the target steam turbine and can be directly driven by the main shaft 201. The bearing housing 102 forms a bearing cavity 103 for accommodating the steam turbine bearing 202. The circulation assembly includes a cooler 104 for cooling the target lubricating medium, and also includes a number of first pipes 105, second pipes 106 and third pipes 107. The first pipes 105 connect the bearing cavity 103 and the cooler 104, the second pipes 106 connect the cooler 104 and the oil pump 101, and the third pipes 107 connect the oil pump 101 and the bearing cavity 103. The bearing housing 102, the cooler 104, the first pipes 105, the second pipes 106 and the third pipes 107 together serve as a storage container for the lubricating medium. In this embodiment, the oil pump 101, powered by the turbine main shaft 201, circulates the lubricating medium through the bearing cavity 103, cooler 104, first pipe 105, second pipe 106, and third pipe 107. The lubricating medium cooled by the cooler 104 ensures the long-term stable operation of the turbine bearing lubrication system in this embodiment. The lubricating medium can be made of materials commonly used in the art. For ease of explanation, water is used as an example of the lubricating medium in this embodiment.

[0036] According to the structure provided in this embodiment, in the turbine bearing lubrication system provided in this embodiment, since the oil pump 101 can be installed on the target turbine main shaft 201 and can be directly driven by the turbine main shaft 201, the turbine bearing lubrication system in this embodiment can save the traditional drive mechanism such as a motor used to control the oil pump 101, and can also reduce the dependence of the oil pump 101 on electricity, thereby enabling the oil pump 101 to operate more stably. In addition, since the lubrication medium circulation loop composed of the bearing housing 102, cooler 104, first pipe 105, second pipe 106 and third pipe 107 can jointly serve as a storage container for the lubrication medium, the turbine bearing lubrication system in this embodiment can also save the need for a separately set oil tank. Thus, the turbine bearing lubrication system in this embodiment can have a significantly lower operating cost than the lubrication system in the prior art, and is far superior to the prior art.

[0037] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3The circulation assembly also includes an inlet pipe 108 and an outlet pipe 109 connected to the cooler 104 for conveying the cooling medium; the outlet pipe 109 passes through the bearing housing 102, and the bearing housing 102 forms a cooling channel 110 communicating with the outlet pipe 109 within the bearing cavity 103. According to the structure provided in this embodiment, the cooling channel 110 communicating with the outlet pipe 109 can provide secondary cooling for the lubricating medium within the bearing cavity 103. Thus, the lubricating medium in the entire lubrication system can undergo two cooling processes—the cooler 104 and the cooling channel 110—which helps to further reduce the operating cost of the turbine bearing lubrication system in this embodiment.

[0038] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The circulation assembly also includes an oil slinger ring 111 for mounting on the turbine main shaft 201; the oil slinger ring 111 partially penetrates the bearing cavity 103 and can rotate with the turbine main shaft 201 relative to the bearing housing 102. According to the structure provided in this embodiment, the oil slinger ring 111, which is mounted on the turbine main shaft 201 and partially penetrates the bearing cavity 103, can rotate with the turbine main shaft 201 and carry the lubricating medium from the bottom of the receiving cavity and spray it onto the bearing surface and journal that need lubrication. In this way, on the one hand, there is no need to design a separate drive mechanism for the oil slinger ring 111, and on the other hand, the oil slinger ring 111 can supply oil to the bearing before the oil pressure reaches the set value. It can also utilize the inertial rotation of the turbine main shaft 201 when the oil pump 101 fails, thereby ensuring the smooth shutdown of the turbine and avoiding dry friction between the turbine main shaft 201 and the turbine bearing 202. This is conducive to further reducing the operating cost of the turbine bearing lubrication system in this embodiment.

[0039] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The circulation assembly also includes an oil reservoir 112 and a liquid level holder 113. The oil reservoir 112 is connected to the bearing housing 102 and is used to automatically replenish the lubricating medium in the bearing cavity 103. The liquid level holder 113 is disposed inside the bearing cavity 103 and is used to maintain a constant liquid level in the bearing cavity 103. The bearing cavity 103 is connected to the first pipe 105 through the outlet of the liquid level holder 113. According to the above structure provided in this embodiment, the oil reservoir 112 connected to the bearing housing 102 can realize the automatic replenishment of the lubricating medium in the bearing cavity 103, and the liquid level holder 113 maintains a constant liquid level in the bearing cavity 103. At the same time, the outlet of the liquid level holder 113 is connected to the first pipe 106, so that the overflow lubricating medium can be recycled and reused through the cooler 104. This is beneficial to further reduce the operating cost of the turbine bearing lubrication system in this embodiment.

[0040] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3The circulation assembly also includes a branch pipe 114 and a pressure relief valve 115. The two ends of the branch pipe 114 are connected to the second pipe 106 and the third pipe 107, respectively. The pressure relief valve 115 is installed on the branch pipe 114 and opens when the pressure in the third pipe 107 exceeds a target value. According to the structure provided in this embodiment, the pressure relief valve 115 installed on the branch pipe 114 automatically opens when the pressure in the third pipe 107 exceeds the target value, allowing the lubricating medium to flow back to the oil pump 101 via the branch pipe 114 and the second pipe 106. This avoids excessive pressure inside the third pipe 107 and allows for the recycling of the lubricating medium, further reducing the operating cost of the turbine bearing lubrication system in this embodiment.

[0041] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The circulation assembly also includes a filter 116 capable of filtering impurities, which is disposed on the third pipe 107. According to the structure provided in this embodiment, by filtering impurities in the lubricating medium through the filter 116 disposed on the third pipe 107, system malfunctions caused by impurities can be effectively avoided, thus further reducing the operating cost of the turbine bearing lubrication system in this embodiment.

[0042] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The circulation assembly also includes a differential pressure gauge 117; the differential pressure gauge 117 is connected between the inlet and outlet of the filter 116 and is used to measure the pressure difference across the filter 116. According to the structure provided in this embodiment, by measuring the pressure difference across the filter 116 using the differential pressure gauge 117 connected between the inlet and outlet of the filter 116, the blockage status of the filter 116 can be accurately determined. This can further prevent system failures and help further reduce the operating cost of the turbine bearing lubrication system in this embodiment.

[0043] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The circulation assembly also includes a pressure sensor 118 and a pressure regulating valve 119 connected in communication. The pressure regulating valve 119 is installed on the third pipe 107 and used to regulate the opening of the third pipe 107. The pressure sensor 118 is installed on the third pipe 107 and used to detect the internal pressure of the third pipe 107. According to the structure provided in this embodiment, by detecting the internal pressure of the third pipe 107 by the pressure sensor 118 and dynamically adjusting the opening of the third pipe 107 in conjunction with the pressure regulating valve 119, it is possible to effectively avoid equipment failure caused by abnormal system pressure, thereby further reducing the operating cost of the turbine bearing lubrication system in this embodiment.

[0044] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3The circulation assembly also includes a pressure gauge 120 installed on the third pipe 107 for direct observation of the internal pressure of the third pipe 107. According to the structure provided in this embodiment, the pressure gauge 120 installed on the third pipe 107 allows operators to promptly obtain the pressure value of the lubricating medium inside the third pipe 107, which can more effectively prevent system failures and further reduce the operating cost of the turbine bearing lubrication system in this embodiment.

[0045] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The circulation assembly also includes a transparent sight glass 121; the sight glass 121 is connected to the first pipe 105 and can expose the internal working conditions of the first pipe 105. According to the structure provided in this embodiment, the sight glass 121 provided on the first pipe 105 allows the operator to quickly know the flow of the lubricating medium inside the first pipe 105, which can more effectively avoid system failures and further reduce the operating cost of the turbine bearing lubrication system in this embodiment.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A turbine bearing lubrication system, characterized in that, include: The oil pump (101) is connected to the main shaft (201) of the target steam turbine and can be directly driven by the main shaft (201); The bearing housing (102) forms a bearing cavity (103) for accommodating the turbine bearing (202). The circulation assembly includes a cooler (104) for cooling the target lubricating medium, and also includes a number of first pipes (105), second pipes (106) and third pipes (107). The first pipes (105) connect the bearing cavity (103) and the cooler (104), the second pipes (106) connect the cooler (104) and the oil pump (101), and the third pipes (107) connect the oil pump (101) and the bearing cavity (103). The bearing housing (102), the cooler (104), the first pipes (105), the second pipes (106) and the third pipes (107) together serve as a storage container for the lubricating medium.

2. The turbine bearing lubrication system as described in claim 1, characterized in that: The circulation assembly also includes an inlet pipe (108) and an outlet pipe (109) connected to the cooler (104) for conveying the cooling medium. The output pipe (109) passes through the bearing housing (102), and the bearing housing (102) forms a cooling channel (110) in the bearing cavity (103) that communicates with the output pipe (109).

3. The turbine bearing lubrication system as described in claim 1, characterized in that: The circulation assembly also includes an oil slinger ring (111) for mounting on the turbine main shaft (201). The oil slinger ring (111) partially penetrates the bearing cavity (103) and can rotate relative to the bearing housing (102) along with the turbine main shaft (201).

4. The turbine bearing lubrication system as described in claim 3, characterized in that: The circulation assembly also includes an oil reservoir (112) and a liquid level maintainer (113). The oil reservoir (112) is connected to the bearing housing (102) and is used to automatically replenish the lubricating medium in the bearing cavity (103). The liquid level holder (113) is disposed inside the bearing cavity (103) and is used to keep the liquid level in the bearing cavity (103) constant. The bearing cavity (103) is connected to the first pipe (105) through the outlet of the liquid level holder (113).

5. The turbine bearing lubrication system as described in claim 1, characterized in that: The circulation assembly also includes a branch pipe (114) and a pressure relief valve (115). The two ends of the branch pipe (114) are connected to the second pipe (106) and the third pipe (107) respectively. The pressure relief valve (115) is installed on the branch pipe (114) and can be opened when the pressure in the third pipe (107) exceeds the target value.

6. The turbine bearing lubrication system as described in claim 1, characterized in that: The circulation assembly also includes a filter (116) capable of filtering impurities, the filter (116) being disposed on the third conduit (107).

7. The turbine bearing lubrication system as described in claim 6, characterized in that: The circulation assembly also includes a differential pressure gauge (117). The differential pressure gauge (117) is connected between the inlet and outlet of the filter (116) and is used to measure the pressure difference across the filter (116).

8. The turbine bearing lubrication system as described in claim 1, characterized in that: The circulation assembly also includes a pressure sensor (118) and a pressure regulating valve (119) with communication connections. The pressure regulating valve (119) is installed on the third pipe (107) and is used to regulate the opening of the third pipe (107). The pressure sensor (118) is installed on the third pipe (107) and is used to detect the internal pressure of the third pipe (107).

9. The turbine bearing lubrication system as described in claim 1 or 8, characterized in that: The circulation assembly also includes a pressure gauge (120) disposed on the third pipe (107) for direct observation of the internal pressure of the third pipe (107).

10. The turbine bearing lubrication system as described in claim 1, characterized in that: The circulation assembly also includes a transparent viewing mirror (121). The observation mirror (121) is connected to the pipe and can reveal the internal working condition of the first pipe (105).

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