Lubricating and cooling device for water guide bearing of water-turbine generator set

Abstract

The utility model belongs to the technical field of bearings, and provides a lubricating and cooling device for a water guide bearing of a water-turbine generator set. Comprising a steel backing and a plurality of tiles connected to the steel backing, and the tiles form a cylinder shape; the fasteners are detachably connected with the two adjacent tiles; the rotating oil basin is arranged at the lower end of the bearing bush; the upper oil tank is arranged at the upper end of the bearing bush; the oil conveying device is provided with an oil inlet and an oil outlet, part of the oil conveying device penetrates through the bearing bush, the bearing bush is provided with a first oil return opening, the oil inlet is formed in the rotating oil basin, and the oil outlet is located outside the upper oil tank; the heat exchanger is arranged at the oil outlet and is provided with a second oil return port; one end of the oil return pipe is connected with the second oil return port, and the other end of the oil return pipe is connected with the first oil return port. Cooling oil downwards cools a bearing bush from the upper oil tank to the rotating oil basin, then is pumped into the cooler from the rotating oil basin, and returns to the upper oil tank after being cooled, so that comprehensive performance such as oil circulation and cooling effect of the bearing is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing technical field, concretely relates to a water guide bearing lubrication cooling device of hydroelectric generating set. BACKGROUND

[0002] In the rotating system of the unit, the bearing as a key component, its performance directly affects the operation stability and reliability of the unit.

[0003] In the related art, the water guide bearing of the motor unit adopts the cylinder type bush, so that the bearing has certain limitation in structure and performance, for example, cannot ensure stable lubrication and heat dissipation, the cooling effect of the bearing is poor, and it is difficult to meet the requirement of the unit on high precision and high stability operation. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a water guide bearing lubrication cooling device of hydroelectric generating set to solve the problem of poor cooling effect of the bearing in the prior art.

[0005] The utility model provides a water guide bearing lubrication cooling device of hydroelectric generating set, include: bushing, including steel back and the plurality of tiles of connecting to steel back, the plurality of tiles constitute cylinder type;Fastener, detachable connection adjacent two tiles;Wherein, each tile forms at least one oil storage groove, and the oil storage groove is linked with adjacent tile.

[0006] In an alternative embodiment, the bushing surface is parabolic.

[0007] In an alternative embodiment, the tile surface is provided with an alloy layer, and the alloy layer covers part of the tile surface to form the oil storage groove.

[0008] In an alternative embodiment, the bearing further comprises a platinum resistance, which is in direct contact with the alloy layer to measure the temperature of the bushing.

[0009] In an alternative embodiment, the number of tiles is four.

[0010] In an alternative embodiment, the bearing further comprises: a rotating oil pan arranged at the lower end of the bushing, an oil feeding tank arranged at the upper end of the bushing, an oil feeding device having an oil inlet and an oil outlet, part of the oil feeding device penetrating the bushing, the bushing being provided with a first oil return port, the oil inlet being arranged in the rotating oil pan, the oil outlet being located outside the oil feeding tank, a heat exchanger arranged at the oil outlet, the heat exchanger having a second oil return port, and an oil return pipe having one end connected to the second oil return port and the other end connected to the first oil return port.

[0011] In an alternative embodiment, the oil feeding device comprises an oil feeding pipe having the oil inlet and the oil outlet, the oil feeding pipe extending out of the upper oil tank after penetrating the bearing bush in the axial direction and entering the upper oil tank.

[0012] In an alternative embodiment, the bearing further comprises a liquid level signal device arranged in the rotating oil pan to detect the oil level of the lubricating oil.

[0013] In an alternative embodiment, the bearing further comprises an oil-water mixing signal device arranged in the upper oil tank.

[0014] The cooling oil of the utility model cools the bearing bush from the upper oil tank to the rotating oil pan, and then is pumped into the cooler from the rotating oil pan, and after cooling, returns to the upper oil tank, so that the comprehensive performance of the oil circulation and cooling effect of the bearing is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is a cross-sectional structure schematic view of the bearing bush of the bearing of an embodiment of the utility model;

[0017] Figure 2 It is a cross-sectional structure schematic view of the bearing bush of the bearing of an embodiment of the utility model;

[0018] Figure 3 It is a cross-sectional structure schematic view of the bearing of an embodiment of the utility model;

[0019] Figure 4 It is a top view structure schematic view of the bearing of an embodiment of the utility model.

[0020] EXPLANATION OF REFERENCE NUMERALS:

[0021] 110, bearing bush;111, tile;112, alloy layer;113, oil storage groove;114, fastener;1101, first oil return port;115, oil wedge;120, rotating oil pan;130, upper oil tank;140, oil feeding device;141, oil feeding pipe;142, pitot tube;150, heat exchanger ； 160, platinum resistance;170, liquid level signal device;180, oil-water mixing signal device;200, shaft. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The bearing is a key component for supporting the rotating system of the unit. The bearing used in the current unit, the water guide bearing of the unit, the cold oil from the rotating oil pan cools the bearing bush from bottom to top and reaches the oil tank, and then returns to the rotating oil pan after being cooled by the cooler. The oil circulation and cooling effect of the bearing are poor. The cooler is placed in the oil tank, and there are inconveniences in maintenance and repair, such as high repair difficulty and cost. In addition, for the monitoring of the running state of the unit, the monitoring signals provided by the traditional bearing are not comprehensive and reliable, which is not conducive to the realization of automatic monitoring and fault warning of the unit.

[0026] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0027] The embodiments of the present application will be described below in combination with Figures 1 to 4 .

[0028] As Figure 1 andFigure 2 As shown, according to the embodiment of the utility model, a water turbine generator unit water guide bearing lubrication cooling device is provided, the water turbine generator unit water guide bearing lubrication cooling device comprises: a bearing bush 110, comprising a steel back and a plurality of tiles 111 connected to the steel back; a fastener 114, detachably connecting two adjacent tiles 111, so that the plurality of tiles 111 constitute a cylinder type; wherein each tile 111 is formed with at least one oil storage groove 113, and the oil storage groove 113 is communicated with the adjacent tile 111.

[0029] In this embodiment, each tile 111 is fixed on the steel back by detachable connection, when some tile 111 is worn or damaged, the whole bearing does not need to be replaced, only the damaged tile 111 needs to be disassembled and replaced, which facilitates individual replacement or maintenance, reduces maintenance cost and downtime and improves the convenience of maintenance. The split design and detachable connection of the tile 111 can more accurately adjust the position and gap of the tile 111 during assembly, improve the assembly accuracy and further optimize the operation performance of the bearing. The fastener 114 can be a screw.

[0030] By providing at least one oil storage groove 113 on each tile 111, and the oil storage groove 113 is communicated with the adjacent tile 111, a continuous oil circuit can be formed. This design can ensure uniform distribution of lubricating oil between the tiles 111, reduce local shortage of lubricating oil, thereby improving lubrication efficiency and reducing friction and wear during operation of the bearing.

[0031] The wide oil storage groove 113 on the tile surface can form a long oil wedge, thereby ensuring that sufficient lubricating oil is transported to the bearing area during rotation of the shaft system, and at the same time, the heat generated by friction can be fully carried out of the bearing area. The wide oil storage groove 113 and the long oil wedge on the surface of the tile 111 can ensure that sufficient lubricating oil is transported to the bearing area during rotation of the shaft system. The lubricating oil generates static pressure through the rotating oil pan, and is delivered to the independent heat exchanger 150 made of red copper material through the Pitot tube 142 for sufficient heat exchange and cooling. The cooled lubricating oil automatically returns to the upper rotating oil pan along the oil return pipe, and enters the oil storage groove 113 of the bearing bush 110 again through the oil delivery channel, realizing recycling.

[0032] Further, the tile surface of the bearing bush 110 is a parabolic surface.

[0033] Further, the tile surface of the bearing bush 110 is a parabolic surface. The surface of the bearing bush 110 is in the shape of a parabolic surface, which can better adapt to the rotation of the shaft and reduce friction. The parabolic bearing bush 110 is more suitable for high-load and high-speed rotating industrial equipment.

[0034] Further, the tile 111 is provided with an alloy layer 112 covering part of the tile surface, so that an oil storage groove 113 is formed between two adjacent alloy layers 112.

[0035] In this embodiment, the alloy of the alloy layer 112 is Babbitt alloy. The curvature of the alloy layer 112 is greater than 45 degrees, and the alloy layer 112 protrudes from the tile body surface, so that a concave part is formed between the alloy layer 112 and the tile body surface, i.e. the oil storage groove 113. The setting of the alloy layer 112 not only improves the wear resistance and corrosion resistance of the tile 111, but also improves the adhesion and distribution of lubricating oil through its surface properties. The oil storage groove 113 formed between the adjacent alloy layers 112 can effectively store lubricating oil, ensure the continuous supply of lubricating oil during operation, reduce the lubrication dead angle, and significantly improve the lubrication performance of the bearing.

[0036] The combination of the alloy layer 112 and the oil storage groove 113 optimizes the lubrication conditions of the bearing, reduces vibration and noise during operation, and enables the bearing to maintain a stable operating state under different working conditions, thereby improving the reliability of the system. In addition, the gap between the oil storage groove 113 and the shaft system is greater than the gap between the alloy layer 112 and the shaft system, so that the oil wedge formed can cover the entire surface of the alloy layer 112, thereby increasing the lubrication area.

[0037] Further, the number of tiles 111 is four. It can be seen that the number of alloy layers 112 is four, and the number of oil storage grooves 113 is four.

[0038] The bearing adopts a steel back, a 4-petal cylinder type Babbitt alloy tile, a relatively wide oil storage groove 113 and a relatively long oil wedge on the tile surface, which can ensure that sufficient lubricating oil is transported to the bearing area during shaft rotation. The design of four tiles 111 makes the layout of the oil storage groove 113 more reasonable, and the lubricating oil can be evenly distributed between the tiles 111. The oil storage groove 113 formed between the alloy layers 112 of adjacent tiles 111 can continuously provide lubrication to the contact surface, reducing the lubrication dead angle.

[0039] Further, the bearing further comprises a platinum resistance 160 in direct contact with the alloy layer 112 to measure the temperature of the bearing tile 110.

[0040] In this embodiment, 2 to 4 platinum resistances 160 in direct contact with the alloy layer 112 can be provided on the bearing tile 110 to measure the temperature of the bearing tile 110 in real time.

[0041] Further, as shown in FIG. 6, the bearing further comprises a platinum resistance 160 in direct contact with the alloy layer 112 to measure the temperature of the bearing tile 110. Figure 3 and Figure 4As shown, the bearing further comprises: a rotating oil pan arranged at the lower end of the bearing bush 110; an oil supply tank arranged at the upper end of the bearing bush 110; an oil delivery device 140 having an oil inlet and an oil outlet, part of the oil delivery device 140 penetrates the bearing bush 110, the bearing bush 110 is provided with a first oil return port 1101, the oil inlet is arranged in the rotating oil pan, and the oil outlet is located outside the oil supply tank; a heat exchanger 150 arranged at the oil outlet, the heat exchanger 150 has a second oil return port; and an oil return pipe having one end connected with the second oil return port and the other end connected with the first oil return port 1101.

[0042] In this embodiment, the bearing mainly comprises a bearing bush 110, a rotating oil pan, an oil supply tank, an oil delivery pipe 141, a Pitot tube 142 and a cooler. The bearing bush 110 is the core part of the bearing, which supports and allows the shaft to rotate. The rotating oil pan is located at the lower end of the bearing bush 110, and its main function is to collect and store lubricating oil to ensure that the bearing bush 110 is fully lubricated during operation. The oil supply tank is arranged at the upper end of the bearing bush 110, which not only stores lubricating oil, but also cools the lubricating oil to maintain the bearing working at an appropriate temperature. The oil delivery pipe 141 penetrates the bearing bush 110 and connects the rotating oil pan and the oil supply tank, which functions to deliver lubricating oil from the oil supply tank to the rotating oil pan and cool the bearing bush 110 in the process. The heat exchanger 150 can be a cooler, which cools the lubricating oil through water cooling. The cooler has a small volume, uses a small amount of water, and is externally connected with the pipe, which is convenient for maintenance and repair.

[0043] The cooler is installed outside the oil supply tank, and all the hot oil cooled by the bearing bush 110 passes through the cooler, which has high efficiency and further reduces the temperature of the lubricating oil, thereby improving the lubricating effect.

[0044] The oil delivery device 140 comprises: an oil delivery pipe 141 having an oil inlet and an oil outlet, the oil delivery pipe 141 penetrates the bearing bush 110 in the axial direction and extends out of the oil supply tank after entering the oil supply tank; and a Pitot tube 142 arranged at the oil inlet.

[0045] In this embodiment, the cooler is provided with a second oil return port, and the first oil return port 1101 and the second oil return port are connected through an oil return pipe to form a closed cooling and circulating system, which ensures that the lubricating oil can smoothly return to the oil supply tank after being cooled by the cooler, thereby maintaining the stable operation of the entire bearing system. The Pitot tube 142 can ensure the stable supply of lubricating oil.

[0046] The cooled oil from the oil supply tank to the rotating oil pan after cooling the bearing bush 110, and then pumped into the cooler from the rotating oil pan by the Pitot tube 142 effect, and then returned to the oil supply tank after cooling, so that the comprehensive performance of the oil circulation and cooling effect of the bearing is improved.

[0047] The cooled oil of the external heat exchanger 150 is returned to the oil tank through the oil return pipe of the heat exchanger 150, then enters the oil storage groove 113 between the bearing bush 110 and the shaft through the first oil return port 1101 on the bearing bush 110 and the oil return hole on the oil retaining cylinder, and falls down with the rotation of the unit, in the process, not only forming the oil wedge 115 and the oil film supporting the bearing bush 110 and the shaft, but also taking away the heat generated by the friction between the shaft and the bearing bush 110, and the oil temperature rises and falls into the rotating oil pan 120. The hot oil in the rotating oil pan 120 enters the ascending oil channel and the oil outlet pipe of the bearing bush 110 through the Pitot tube 142, enters the external oil cooler, and after being cooled by the cooler, enters the oil tank 130 through the cooler oil return pipe. Thus, the cycle is repeated.

[0048] Further, the bearing further comprises a liquid level signal 170, and the liquid level signal 170 is arranged in the rotating oil pan 120 to detect the oil level of the lubricating oil. The liquid level signal 170 is installed in the interior of the rotating oil pan 120, and the main function thereof is to monitor and detect the oil level of the lubricating oil in real time.

[0049] Further, the bearing further comprises an oil-water mixing signal 180, and the oil-water mixing signal 180 is arranged in the oil tank 130. The oil-water mixing signal 180 is installed in the oil tank 130, and the oil-water mixing condition in the oil tank 130 can be detected.

[0050] The utility model further provides a hydroelectric generator, include: shaft 200, bearing of any item, bearing is installed on the shaft 200.

[0051] In the example, the bearing is a core component for supporting the rotating system of the unit, and its importance is self-evident. After technical transformation, the original bearing is transformed into a cylindrical parabolic bearing, and the bearing can meet the use requirements under various complex working conditions.

[0052] The bearing adopts a steel back and a split cylindrical babbitt tile design, which allows the tiles 111 to be replaced completely. On the tile surface, a wide oil storage groove 113 and a long oil wedge 115 are uniformly arranged, which can ensure that sufficient lubricating oil is delivered to the support area during the rotation of the shaft system. At the same time, these oil storage grooves 113 and oil wedges 115 can effectively take away the heat generated by friction from the support area, and then the heat will flow back to the rotating oil pan 120 which is relatively low in position along with the lubricating oil.

[0053] During the rotation of the rotating oil pan 120, the lubricating oil is pushed to the side wall and static pressure is generated. Then, the lubricating oil is transported to the independent heat exchanger 150 made of red copper, i.e. the cooler, through the Pitot tube 142 for sufficient heat exchange and cooling. The cooled lubricating oil is automatically returned to the rotating oil pan 120 through the oil return pipe and enters the oil storage groove 113 of the bearing bush 110 through the oil supply channel to start a new cycle.

[0054] In order to monitor the temperature of the bearing bush 110 in real time, 2 to 4 platinum thermal resistors 160 directly contacting the alloy are arranged on the bearing bush 110. In addition, a liquid level signaler 170 for detecting the oil level in the rotating oil pan 120 is also provided in the bearing. If necessary, an oil-water mixing signaler 180 for detecting the oil-water mixing condition in the upper oil tank 130 and other automatic monitoring components can also be installed. These monitoring devices can provide stable and reliable signals for the automatic monitoring of the unit and ensure the safety and reliability of the unit operation.

[0055] The size of the bearing bush of the unit is set and processed according to the corresponding technical parameters. During the on-site installation, the main requirements are to ensure the concentricity of the bearing bush and the main shaft and the uniformity of the single-side gap of the bearing area.

[0056] Obviously, the above embodiments are only examples for clearly illustrating but not limiting the embodiments.

[0057] Those skilled in the art can make other different forms of changes or modifications on the basis of the above description. Here, all the embodiments cannot be exhausted and the obvious changes or modifications derived therefrom are still within the protection scope of the utility model.

Claims

1. A water turbine generator unit water guide bearing lubrication cooling device, characterized by, Comprising: a bearing shell comprising a steel back and a plurality of tiles connected to the steel back; a fastener detachably connecting two adjacent tiles so that the plurality of tiles form a cylinder; a rotating oil pan provided at a lower end of the bearing shell; an oil feeding tank provided at an upper end of the bearing shell; an oil feeding device having an oil inlet and an oil outlet, part of the oil feeding device penetrating the bearing shell, the bearing shell being provided with a first oil return port, the oil inlet being provided in the rotating oil pan, the oil outlet being located outside the oil feeding tank; a heat exchanger provided at the oil outlet, the heat exchanger having a second oil return port; an oil return pipe having one end connected to the second oil return port and the other end connected to the first oil return port; wherein each of the tiles is formed with at least one oil storage groove in communication with an adjacent tile.

2. The water turbine generator set water guide bearing lubrication and cooling device according to claim 1, characterized in that, The tile surface of the bearing shell is parabolic.

3. A water turbine generator set water guide bearing lubrication and cooling device according to claim 1, characterized in that, The tile surface of the tile is provided with an alloy layer covering part of the tile surface, so that the alloy layer between two adjacent alloy layers forms the oil storage groove.

4. The water turbine generator set water guide bearing lubrication and cooling device according to claim 3, characterized in that, Further comprising a platinum resistance in direct contact with the alloy layer to measure the temperature of the bearing shell.

5. A lubrication and cooling device for water turbine generator set water guide bearing according to any one of claims 1 to 4, characterized in that, The number of tiles is four.

6. A water turbine generator set water guide bearing lubrication and cooling device according to any one of claims 1 to 4, characterized in that, Further comprising: a rotating oil pan provided at a lower end of the bearing shell; an oil feeding tank provided at an upper end of the bearing shell; an oil feeding device having an oil inlet and an oil outlet, part of the oil feeding device penetrating the bearing shell, the bearing shell being provided with a first oil return port, the oil inlet being provided in the rotating oil pan, the oil outlet being located outside the oil feeding tank; a heat exchanger provided at the oil outlet, the heat exchanger having a second oil return port; an oil return pipe having one end connected to the second oil return port and the other end connected to the first oil return port.

7. A water turbine generator set water guide bearing lubrication and cooling device according to claim 6, characterized in that, The oil feeding device comprises: an oil feeding pipe having the oil inlet and the oil outlet, the oil feeding pipe extending out of the oil feeding tank after penetrating the bearing shell in the axial direction and entering the oil feeding tank; a Pitot tube provided at the oil inlet.

8. A water turbine generator set water guide bearing lubrication and cooling device according to claim 6, characterized in that, Further comprising a liquid level signal provided in the rotating oil pan to detect the oil level of the lubricating oil.

9. A water turbine generator set water guide bearing lubrication and cooling device according to claim 6, characterized in that, Further comprising an oil-water mixing signal provided in the oil feeding tank.

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