Oil-water cooler for vertical sliding bearings

Abstract

The present invention discloses an oil-water cooler for a vertical sliding bearing, which is arranged in the oil inlet channel of the sliding bearing, and includes a plurality of parallel fan-shaped cooling pipe units, a water inlet pipe and a water outlet pipe, each cooling pipe unit is respectively connected to the water inlet pipe and the water outlet pipe, the water inlet pipe and the water outlet pipe are both annular pipes, and the water inlet pipe and the water outlet pipe surround the outer edge of the circle formed by the parallel connection of the cooling pipe units to form a circular cooling pipe assembly. The present invention adopts a parallel connection method of multiple fan-shaped cooling pipe units to achieve unitization and independence between the cooling pipes, and the independent installation method reduces the maintenance difficulty of the cooling pipes; it solves the problem that the lubricating oil coming out of the tile does not pass through the cooler but directly enters the tile to form a lubricating oil short circuit due to low speed and insufficient oil pumping capacity of the thrust head pump oil hole.

Description

Technical Field

[0001] The invention relates to an oil-water cooler for a vertical sliding bearing, and belongs to the field of bearings, in particular to the field of vertical bearings. Background Art

[0002] The vertical thrust sliding bearing is one of the main components in the vertical generator. It is the guarantee for the normal working performance of the thrust bearing, and its heat dissipation capacity is directly related to whether the thrust bearing can operate normally and safely. As the capacity of the vertical motor increases, the loss of the thrust bearing also increases, and the heat dissipation capacity of the thrust bearing cooler is also required to be higher. In water conservancy projects, vertical thrust sliding bearings often operate under low-speed and heavy-load conditions. Due to the low speed, the pump oil suction capacity of the thrust head is insufficient, the lubricating oil inside the bearing oil chamber cannot flow fully, and the hot oil near the thrust bearing cannot flow to the outside to exchange heat with the oil-water cooler, resulting in high thrust bearing temperature and even burning bearing shutdown accidents, causing serious losses and a high bearing accident rate.

[0003] Ordinary oil-water coolers use side water inlet and outlet or top water inlet and outlet. The above two water inlet and outlet methods will retain some water in the cooling pipe when the machine is shut down. When the ambient temperature is lower than 0℃, the water retained in the cooling pipe will freeze. If the ice is too large, it will damage the cooling pipe. In the existing vertical thrust sliding bearing cooler, all cooling pipes are connected in series. The cooling pipes in this structural form are that if there is a leakage defect in all cooling pipes, the thrust sliding bearing can only be started after the water inlet and outlet are closed, the original cooler is disassembled and the spare cooler is reinstalled. Not only is the disassembly difficult, but also the dependence on bearing spare parts is increased.

[0004] For some high-load, low-speed working conditions, the traditional oil-water cooler structure cannot effectively exert its heat dissipation capacity, resulting in high thrust bearing temperature and even affecting the normal operation of the unit. The residual water in the cooling pipe may also freeze and block the cooling pipe, affecting the normal use of the cooler. Summary of the invention

[0005] In view of the above problems existing in the prior art, the purpose of the present invention is to obtain a new type of high-efficiency, online-replaceable oil-water cooler for vertical sliding bearings based on the existing oil-water cooler.

[0006] In order to achieve the above-mentioned purpose of the invention, the technical scheme of the oil-water cooler for the vertical sliding bearing adopted by the present invention is as follows:

[0007] The oil-water cooler for the vertical sliding bearing is arranged in the oil inlet channel of the sliding bearing, and includes a plurality of parallel fan-shaped cooling pipe units, a water inlet pipe and a water outlet pipe, each cooling pipe unit is respectively connected to the water inlet pipe and the water outlet pipe, the water inlet pipe and the water outlet pipe are both annular pipes, and the water inlet pipe and the water outlet pipe surround the outer edge of the circle formed by the parallel cooling pipe units to form a circular cooling pipe assembly. A plurality of cooling pipe units are connected in parallel to form a circular cooling pipe assembly, and the fan-shaped cooling pipe units have the same structure, and can form a perfect circle with the same radius in parallel, so that the annular inlet and outlet pipes surround the outside of the cooling pipe assembly. The oil-water cooler is arranged in the oil inlet channel of the bearing, so that all the hot oil coming out of the tile in the oil circuit circulation must be cooled by the cooler before it can be circulated, ensuring that the oil entering the bearing tile is all cooling oil cooled by the cooling pipe, greatly improving the stability of the bearing, and avoiding the prior art that the lubricating oil entering the tile is mostly the lubricating oil coming out of the tile due to the oil circuit short circuit, resulting in the tile temperature being in a state of fluctuating.

[0008] Preferably, the cooling tube unit is a multi-layer tube structure, that is, each cooling tube unit is provided with multi-layer fan-shaped pipelines, which fully utilizes the space to achieve a more thorough cooling effect.

[0009] More preferably, the cooling pipe unit is a double-layer structure, one layer is connected to the water inlet pipe, and the other layer is connected to the water outlet pipe. The connection port is arranged on the outer pipeline with the longest fan-shaped arc length of the fan-shaped cooling pipe unit. The connection port is arranged on the outermost pipeline, and the two layers of pipelines are each connected to an inlet and outlet water pipe, which ensures that there is no cooling water accumulation at the fan corner of the fan-shaped cooling pipe unit, so that the entire cooling circuit can be cooled more quickly and thoroughly.

[0010] Preferably, the oil-water cooler is arranged in the oil inlet channel on the sliding bearing frame. Such a design can force cooling of the lubricating oil entering the bearing block when the speed is low and the pumping capacity of the thrust head pump oil hole is insufficient, thereby stabilizing the bearing temperature more quickly.

[0011] More preferably, the frame is provided with support ribs, and the cooler units and the support ribs are arranged alternately. This arrangement reduces the volume of the oil tank, makes the bearing structure more compact, and has a smaller radial dimension. At the same time, the axial rigidity of the frame oil tank is improved, and the amount of raw materials used is reduced.

[0012] More preferably, the annular diameters of the water inlet pipe and the water outlet pipe are different, and the water inlet pipe and the water outlet pipe are arranged on the same radial plane of the oil-water cooler.

[0013] As a preferred embodiment, the diameter of the ring of the water inlet pipe is larger than the diameter of the ring of the water outlet pipe, that is, the water inlet pipe is arranged outside the water outlet pipe. Such a design facilitates the discharge of the cooled cooling water as soon as possible, while introducing new cooling water, thereby accelerating the circulation of the cooling water.

[0014] Preferably, the water inlet of the water inlet pipe and the water outlet of the water outlet pipe are arranged at the same opening position of the oil-water cooler. However, the water inlet and the water outlet are arranged on both sides of the same opening. Such an arrangement is more convenient for the design and arrangement of water pipes, and the cooling system formed is more scientific and complete. The cooling water in each cooling pipe unit is connected to the water inlet pipe or the water outlet pipe through pipelines arranged at different levels, and the water circulation in the cooling pipe unit is also more thorough and rapid.

[0015] Preferably, the oil-water cooler also includes a flange, and the cooling pipe unit and the water inlet pipe, and the cooling pipe unit and the water outlet pipe are connected by flanges. The flange connection facilitates the replacement and maintenance of various components in the cooler. The flange connection cooperates with the low-level water supply system of the oil-water cooler, avoiding the traditional technical solution of introducing water inlet and outlet from a high position or a side position. If the unit is shut down for a long time, the remaining cooling water in the cooling pipe cannot be completely discharged, which accelerates the corrosion of the cooling pipeline and shortens the service life. If the unit is located in a very cold area (below freezing point), the remaining cooling water will swell and damage the cooling pipe due to the frozen volume. Because the cooler is located inside the bearing, it is impossible to detect the cracks in the damaged cooling pipe in time, which causes the unit to be unable to start and operate.

[0016] Preferably, the cooler also includes a ball valve, which is arranged between the flange and the inlet and outlet water pipes, so as to flexibly control the cooling pipe unit and the entire oil-water cooler. As a preferred embodiment, a ball valve is provided at the flange of each cooler unit. Each cooling pipe unit is equipped with an inlet and outlet water valve, which can not only control the inlet and outlet water pipes of the cooling pipe unit individually, but also does not need to shut off the cooling water of the sliding bearing when replacing the cooling pipe unit, and can even replace the cooling pipe unit online without stopping the machine. In addition, compared with the maintenance and replacement of existing coolers, the cooler only needs to replace the leaking cooling pipe unit, without replacing the entire cooler, which not only saves the time for maintenance and replacement, but also improves the effective use of resources.

[0017] Compared with the prior art, the present invention adopts a parallel connection mode of multiple fan-shaped cooling pipe units, realizes the unitization and independence between the cooling pipes, and the independent installation mode reduces the maintenance difficulty of the cooling pipes; solves the problem that the lubricating oil from the tile does not pass through the cooler but directly enters the tile to form a lubricating oil short circuit due to low speed and insufficient pumping capacity of the thrust head pump oil hole. The independent cooling pipe unit using multiple fan-shaped cooling pipes in parallel can independently control the inlet and outlet water pipes of the cooling pipe unit. When replacing the cooling pipe unit, there is no need to shut down the cooling water of the sliding bearing, and the cooling pipe unit can even be replaced online without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an oil-water cooler for a vertical sliding bearing provided by the present invention;

[0019] Figure 2 It is a structural cross-sectional view of an oil-water cooler for a vertical sliding bearing provided by the present invention;

[0020] Figure 3 It is a partial assembly schematic diagram of an oil-water cooler for a vertical sliding bearing provided by the present invention;

[0021] Figure 4 It is a cross-sectional view of the assembly direction BB of the oil-water cooler for the vertical sliding bearing provided by the present invention;

[0022] Figure 5 The present invention provides a partial oil circuit circulation diagram of an oil-water cooler for a vertical sliding bearing.

[0023] Reference numerals

[0024] 1 cooling pipe unit; 2 water inlet pipe; 21 water inlet; 3 water outlet pipe; 31 water outlet; 4 flange; 5 ball valve; 6 frame; 61 supporting rib. DETAILED DESCRIPTION

[0025] The oil-water cooler for vertical sliding bearings provided by the present invention is further described in detail and completely in conjunction with the embodiments. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] The experimental methods in the following examples are conventional methods unless otherwise specified. The experimental materials used in the following examples are commercially available unless otherwise specified.

[0027] like Figures 1-2 The structural schematic diagram and axial cross-sectional diagram of the oil-water cooler for vertical sliding bearings shown in the figure, the oil-water cooler in the present invention adopts a plurality of parallel fan-shaped cooling pipe units 1, and the plurality of fan-shaped cooling pipe units 1 are connected in parallel to form a circular cooling pipe assembly, and the circular cooling pipe assembly is provided with an annular water inlet pipe 2 and a water outlet pipe 3. The cooling pipe unit 1 is provided with multiple layers of cooling pipes, and the number of cooling pipe layers in this embodiment is two layers, and each of the two layers of cooling pipe units has an opening, and the opening is provided on the edge pipeline with the longest fan-shaped arc length, one opening is connected to the water inlet, and the other opening is connected to the water outlet, so as to form a complete water circulation loop in the entire cooling pipe unit 1, and there will be no problem of poor condensed water reflux at the fan-shaped corner, and there is no need to open the fan corner to lengthen the return water pipeline. With one layer of pipeline inlet and one layer of pipeline outlet, not only the cooling area is increased, but also the cooling water loop is accelerated, and the cooling efficiency is improved.

[0028] In this embodiment, the annular diameter of the water inlet pipe 2 is larger than the annular diameter of the water outlet pipe 3, that is, the water inlet pipe 2 is arranged outside the water outlet pipe 3. The water inlet pipe 2 and the water outlet pipe 3 each have a circular tube, and the water inlet pipe 2 and the water outlet pipe 3 open on the same side of the oil-water cooler, but the water inlet 21 of the water inlet pipe 2 and the water outlet 31 of the water outlet pipe 3 are not on the same side of the opening, and the cooling water forms a complete cooling circuit between the water inlet pipe 2 and the water outlet pipe 3. Figure 2 The cooling tube unit 1 is shown as a double-layer water pipe loop. The cooling tube unit 1 is connected to the water inlet pipe 2 and the water outlet pipe 3 through a flange 4. One layer of the double-layer structure of the cooling tube unit 1 is connected to the water inlet pipe 2 through a pipeline, and the other layer is connected to the water outlet pipe 3. Therefore, a complete water circulation loop is also formed in each cooling tube unit 1, making the cooling system of the entire oil-water cooler more efficient.

[0029] A ball valve 5 is also provided at the connection of the flange 4. Each cooling pipe unit 1 is equipped with a ball valve 5 for controlling the water inlet and outlet, so that each cooling pipe unit 1 can be controlled individually. When replacing the cooling pipe unit 1, there is no need to shut down the cooling water of the sliding bearing, and the cooling pipe unit 1 can even be replaced online without stopping the machine. When one or several cooling pipe units 1 need to be repaired and replaced, there is no need to replace the entire cooler, thereby improving the effective utilization rate of the vertical sliding bearing.

[0030] like Figure 3 and 4 As shown, the oil-water cooler of the present invention is arranged in the fan-shaped oil inlet channel in the middle of the support rib 61 of the frame 6, and the cooling pipe unit 1 is placed in the bottom plate oil passage of the vertical sliding bearing oil tank. At least double-layer cooling pipes improve the cooling efficiency, making the radial dimension of the bearing oil tank smaller, and the length of the cooling pipe is also reduced, thereby improving the cooling efficiency. When assembling the oil-water cooler, first install the water inlet pipe 2 and the water outlet pipe 3, tighten the screws at the flange 4, install the cooling pipe unit 1 between the support ribs 61 of the frame 6, and finally install the flange 4 and the ball valve 5.

[0031] The oil-water cooler of the present invention is placed on the bottom frame 6 of the bearing, and the cooling water is introduced from a low position. The joint between the cooling pipe unit 1 and the inlet and outlet water pipes is connected by a flange 4. The cooling water is circulated in a downward water inlet and outlet manner, which makes the discharge of the cooling water simpler and avoids the corrosion of the pipeline due to the inability to discharge the cooling water for a long time. At the same time, it also avoids the cracking of the pipeline caused by the freezing of the cooling water in the severe cold, which affects the normal use of the entire unit.

[0032] like Figure 5As shown, when the vertical bearing is operating normally, the lubricating oil in the oil tank of the frame 6 will form an oil circuit circulation under the pumping effect of the thrust head pump oil hole, and the arrow in the figure shows the flow direction of the lubricating oil. Since the cooling pipe unit 1 is set in the oil inlet channel of the bearing lubricating oil, in the oil circuit circulation, all the hot oil coming out of the tiles must be cooled by the cooler unit before entering the circulation, ensuring that the oil entering the tiles is the lubricating oil cooled by the cooler.

[0033] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the present invention in detail and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the present invention all fall within the scope of protection of the present invention.

Claims

1. An oil-water cooler for a vertical sliding bearing, characterized in that: The oil-water cooler for the vertical sliding bearing is arranged in the oil inlet channel of the sliding bearing, and comprises a plurality of parallel fan-shaped cooling pipe units (1), a water inlet pipe (2) and a water outlet pipe (3), each cooling pipe unit (1) is respectively connected to the water inlet pipe (2) and the water outlet pipe (3), the water inlet pipe (2) and the water outlet pipe (3) are both annular pipes, the water inlet pipe (2) and the water outlet pipe (3) surround the outer edge of the parallel cooling pipe unit (1), and form a circular cooling pipe assembly; the cooling pipe unit (1) is a double The invention discloses a double-layer cooling pipe having a layer structure, wherein one layer of the double-layer cooling pipe is connected to a water inlet pipe (2), and the other layer is connected to a water outlet pipe (3); the water inlet pipe (2) and the water outlet pipe (3) are arranged on the same radial surface of the oil-water cooler; the annular diameter of the water inlet pipe (2) is larger than the annular diameter of the water outlet pipe (3); the water inlet pipe (2) is provided with a water inlet (21), and the water outlet pipe (3) is provided with a water outlet (31); the water inlet (21) of the water inlet pipe (2) and the water outlet (31) of the water outlet pipe (3) are arranged at the same opening position of the oil-water cooler.

2. The oil-water cooler according to claim 1, characterized in that: The oil-water cooler further comprises a flange (4), and the cooling pipe unit (1) and the water inlet pipe (2), as well as the cooling pipe unit (1) and the water outlet pipe (3) are connected via the flange (4).

3. The oil-water cooler according to claim 1, characterized in that: The cooler also includes a ball valve (5) which is arranged between the flange (4) and the water inlet pipe (5) and the water outlet pipe (5).

4. The oil-water cooler according to claim 1, characterized in that: The oil-water cooler is arranged in the oil inlet channel on the sliding bearing frame (6).

5. The oil-water cooler according to claim 4, characterized in that: The frame (6) is provided with supporting ribs (61), and the cooler units (1) and the supporting ribs (2) are arranged alternately.

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