Forced lubrication system for bearing of water sealing pump

Abstract

The utility model relates to a forced lubrication system for a water sealing pump bearing. Comprising an oil feeding pipeline provided with a filter, a circulating oil pump and a plate heat exchanger, one end of the oil feeding pipeline is connected to an oil outlet of the circulating oil pump, the other end of the oil feeding pipeline is connected to a primary side inlet of the plate heat exchanger, and an oil return pipeline is installed at a primary side outlet of the plate heat exchanger; a water return pipeline is mounted on a primary side outlet of the plate heat exchanger; an oil return pipeline is connected to an inlet of the oil return oil tank, an outlet of the oil supply oil tank is connected to an oil inlet of the circulating oil pump through a pipeline, and oil inlets of the multiple water sealing pump bearings are connected with multiple outlets of the oil return oil tank through pipelines. Oil outlets of the multiple water sealing pump bearings are connected with multiple inlets of the oil feeding tank through pipelines, and a cooling water circulation assembly is installed between the water inlet pipeline and the water return pipeline. According to the forced lubrication system for the water sealing pump bearing, external circulation is built for lubricating oil in the water sealing pump bearing, the filtering effect and the cooling effect are exerted in the lubricating oil circulation process, internal particulate matter is removed through filtering so as to reduce friction, and the quality of the lubricating oil is guaranteed through cooling.

Description

Technical Field

[0001] The utility model belongs to the technical field of lubrication systems, and particularly relates to a forced lubrication system for the bearings of a seal water pump. Background Art

[0002] The seal water pump is a supporting facility for the dredge pump of a dredger, which is used to protect the normal operation of the dredge pump of the dredger, extend the service life of the dredge pump, and can also be used as a bilge pump, a ballast pump, a fire pump, etc. for various ships. Generally, the dredger is equipped with a two-stage horizontal centrifugal pump as the seal water pump. There are bearing seats at both ends of the volute casing of the seal water pump, and the rotating shaft is installed on the bearings in the bearing seats. In order to ensure the lubrication effect, reduce the resistance and extend the service life, bearing oil or other types of lubricating oil needs to be added to the bearings in the bearing seats.

[0003] Since the operating conditions of the dredger are usually relatively harsh, the operating intensity of the seal water pump is relatively large, and some metal debris may be generated inside the bearings. In addition, external impurities such as sediment may enter the inside of the bearings, resulting in the deterioration of the lubricating oil quality inside the bearings. The lubricating oil mixed with metal debris and sediment particles will further cause wear problems of the bearings, and in severe cases, the seal water pump equipment cannot operate normally. In addition, continuous high-intensity operation will also cause the temperature of the lubricating oil inside the bearings to rise. When the temperature of the lubricating oil is too high, it will cause the modification of the lubricating oil, resulting in weakened lubrication ability or even lubrication failure problems.

[0004] In summary, it is necessary to develop and design an auxiliary system for lubricating the bearings of the seal water pump to solve the above-mentioned technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a forced lubrication system for the bearings of a seal water pump, which constructs an external circulation for the lubricating oil inside the bearings of the seal water pump, applies a filtering effect and a cooling effect during the circulation of the lubricating oil, removes internal particulate matter through filtration to reduce friction, and ensures the quality of the lubricating oil through cooling.

[0006] The technical solution adopted by the utility model is: a forced lubrication system for the bearings of a seal water pump, which includes an oil supply pipeline equipped with a filter, a circulating oil pump, and a plate heat exchanger. One end of the oil supply pipeline is connected to the oil outlet of the circulating oil pump, and the other end is connected to the primary side inlet of the plate heat exchanger. An oil return pipeline is installed at the primary side outlet of the plate heat exchanger, a water inlet pipeline is installed at the primary side inlet of the plate heat exchanger, and a water return pipeline is installed at the primary side outlet of the plate heat exchanger; it also includes an oil return fuel tank and an oil supply fuel tank. The oil return pipeline is connected to the inlet of the oil return fuel tank, the outlet of the oil supply fuel tank is connected to the oil inlet of the circulating oil pump through a pipeline, the oil inlet ports of multiple seal water pump bearings are connected to multiple outlets of the oil return fuel tank through pipelines, the oil outlet ports of multiple seal water pump bearings are connected to multiple inlets of the oil supply fuel tank through pipelines, and a cooling water circulation component is installed between the water inlet pipeline and the water return pipeline.

[0007] Preferably, the plate heat exchanger includes a first plate heat exchanger and a second plate heat exchanger arranged in parallel. The oil supply pipeline is simultaneously connected to the primary side inlets of the two plate heat exchangers, the oil return pipeline is simultaneously connected to the primary side outlets of the two plate heat exchangers, the water inlet pipeline is simultaneously connected to the secondary side inlets of the two plate heat exchangers, and the water return pipeline is simultaneously connected to the secondary side outlets of the two plate heat exchangers.

[0008] Preferably, a bypass pipeline is also provided on the side of the filter, and manual valves are installed on the inlet and outlet of the filter and on the bypass pipeline.

[0009] Preferably, a pressure relief component is installed on the pipeline between the water return pipeline and the secondary side outlets of the first plate heat exchanger and the second plate heat exchanger. The pressure relief component includes a pressure relief valve installed on the secondary side outlet pipeline and a pressure relief pipe simultaneously connected to the outlets of the two pressure relief valves.

[0010] Preferably, a thermometer and a flow meter are installed on the oil return pipeline, and a display for displaying the oil return temperature and the oil return flow rate is also included. The thermometer and the flow meter are connected to the display through a wire harness.

[0011] Preferably, the cooling water circulation component includes a circulation water pump, a suction pipe, and a drain pipe. The suction pipe and the drain pipe are located inside the ship's sea chest. The circulation water pump extracts low-temperature seawater from around the ship through the suction pipe and discharges it through the drain pipe after heat exchange in the plate heat exchanger.

[0012] Preferably, the cooling water circulation component includes a low-temperature water tank, a refrigeration unit, and a circulation water pump. Clean water is used as the cooling medium. The refrigeration unit prepares low-temperature clean water, and the circulation water pump establishes a circulation of the low-temperature clean water between the low-temperature water tank and the plate heat exchanger.

[0013] The advantages and positive effects of the present utility model are:

[0014] The present utility model provides a forced lubrication system for the seal water pump bearing, which constructs an external circulation for the lubricating oil in the seal water pump bearing. During the external circulation process of the lubricating oil, first, the lubricating oil will pass through the filter, and impurities such as water debris and sediment particles mixed in the lubricating oil will be filtered and intercepted, which improves the cleanliness of the lubricating oil and effectively avoids the problem of wear of the seal water pump bearing caused by particulate impurities mixed in the lubricating oil during the continuous high-intensity operation of the seal water pump. During the external circulation process of the lubricating oil, the lubricating oil exchanges heat with the low-temperature medium when passing through the plate heat exchanger, and the temperature of the lubricating oil decreases. In this way, during the continuous high-intensity operation of the seal water pump, the lubricating oil in the seal water pump bearing will not be modified due to excessive temperature, which ensures the quality of the lubricating oil and the lubrication effect.

[0015] By setting up an oil return tank and an oil supply tank, this forced lubrication system can act on multiple seal water pump bearings on ship facilities simultaneously. One system can meet the forced lubrication requirements of multiple seal water pump bearings, ensuring the stable operation of the dredger. Brief Description of the Drawings

[0016] Figure 1 is the front view structural schematic diagram of the present utility model;

[0017] Figure 2 is the three-dimensional structural schematic diagram of the main body part of the present utility model.

[0018] In the figures:

[0019] 1. Circulating oil pump; 2. Oil supply pipeline; 3. Manual valve; 4. Wiring harness; 5. Filter; 6. Oil return pipeline; 7. Pressure relief component; 8. Water return pipeline; 9. Water inlet pipeline; 10. First plate heat exchanger; 11. Second plate heat exchanger; 12. Thermometer; 13. Flowmeter; 14. Oil return tank; 15. Seal water pump bearing; 16. Oil supply tank; 17. Display; 18. Bypass pipeline. Detailed Embodiment

[0020] To further understand the invention content, features and effects of the present utility model, the following embodiments are given for detailed description.

[0021] Please refer to Figure 1 and Figure 2 , for the forced lubrication system of the seal water pump bearing of the present utility model, an external circulation is constructed for the lubricating oil in the seal water pump bearings 15 of multiple seal water pumps. During the external circulation process, filtration and heat exchange cooling effects are applied to the lubricating oil, continuously and effectively filtering out particulate impurities contained in the lubricating oil to make it clean, continuously and effectively reducing the temperature of the lubricating oil, and avoiding the modification problem caused by too high lubricating oil temperature. By continuously and effectively ensuring the quality of the lubricating oil, the stable operation of the seal water pump equipment can be guaranteed.

[0022] What is referred to as "forced lubrication" in this patent means that in the traditional situation without lubricating oil treatment measures, due to the mixing of impurities in the lubricating oil and the excessive increase of oil temperature, it is necessary to stop the pump regularly for treatment, or maintain the seal water pump facilities during the construction interval; after installing this lubrication system, due to the establishment of an external circulation for the lubricating oil and forced filtration and forced cooling during the external circulation process, the lubricating oil can maintain its lubrication quality for a long time, that is, by taking effective technical means to force the seal water pump bearings 15 to be in a good lubricated operating state for a long time.

[0023] The forced lubrication system includes an oil supply pipeline 2 equipped with a filter 5, a circulating oil pump 1, and a plate heat exchanger. One end of the oil supply pipeline 2 is connected to the oil outlet of the circulating oil pump 1, and the other end is connected to the primary side inlet of the plate heat exchanger. An oil return pipeline 6 is installed at the primary side outlet of the plate heat exchanger, a water inlet pipeline 9 is installed at the primary side inlet of the plate heat exchanger, and a water return pipeline 8 is installed at the primary side outlet of the plate heat exchanger. Thus, under the action of the circulating oil pump 1, the lubricating oil flows in the oil supply pipeline 2, the oil return pipeline 6, and the primary side of the plate heat exchanger, constructing an external circulation. The lubricating oil is filtered when passing through the filter 5 and is cooled by heat exchange when passing through the plate heat exchanger.

[0024] The filter 5 includes a housing and a filter screen located inside the housing. A bottom cover that can be opened is installed at the bottom of the housing of the filter 5. When it is necessary to clean the inside to discharge the filtered metal debris and sediment particles, the bottom cover is opened. In this embodiment, a bypass pipeline 18 is also provided on the side of the filter 5. Manual valves 3 are installed at the inlet and outlet of the filter 5 and on the bypass pipeline 18. The function of setting the bypass pipeline 18 is that when it is necessary to clean the filter 5, the bypass pipeline 18 is conducted through the manual valve 3, and the filter 5 is cut off from the oil supply pipeline 2 through the manual valve 3. After cleaning, the bypass pipeline 18 is disconnected and the filter 5 is restored to conduction.

[0025] It also includes an oil return tank 14 and an oil supply tank 16. The oil return pipeline 6 is connected to the inlet of the oil return tank 14. The outlet of the oil supply tank 16 is connected to the inlet of the circulating oil pump 1 through a pipeline. The inlets of multiple seal water pump bearings 15 are connected to multiple outlets of the oil return tank 14 through pipelines, and the outlets of multiple seal water pump bearings 15 are connected to multiple inlets of the oil supply tank 16 through pipelines. In this way, this forced lubrication system can act on multiple seal water pump bearings 15 of multiple seal water pumps at the same time. Each dredger can meet the forced lubrication requirements of multiple seal water pump bearings 15 by configuring a set of this forced lubrication system, ensuring the stable operation of the dredger.

[0026] In this embodiment, the plate heat exchanger includes a first plate heat exchanger 10 and a second plate heat exchanger 11 arranged in parallel. The two can be configured as one in use and one in reserve to improve the reliability of system operation, or can be started simultaneously to improve the cooling efficiency of the lubricating oil. At this time, the oil supply pipeline 2 is simultaneously connected to the primary side inlets of the two plate heat exchangers, the oil return pipeline 6 is simultaneously connected to the primary side outlets of the two plate heat exchangers, the water inlet pipeline 9 is simultaneously connected to the secondary side inlets of the two plate heat exchangers, and the water return pipeline 8 is simultaneously connected to the secondary side outlets of the two plate heat exchangers.

[0027] As shown in Figure 2, manual valves 3 are provided on the pipeline between the oil supply pipeline 2 and the primary side inlets of the two plate heat exchangers, as well as on the pipeline between the oil return pipeline 6 and the primary side outlets of the two plate heat exchangers. The access of the first plate heat exchanger 10 and the second plate heat exchanger 11 is controlled by controlling the opening and closing of each manual valve 3. Similarly, manual valves 3 are provided on the pipeline between the water inlet pipeline 9 and the secondary side inlets of the two plate heat exchangers, as well as on the pipeline between the water return pipeline 8 and the secondary side outlets of the two plate heat exchangers. The access of the first plate heat exchanger 10 and the second plate heat exchanger 11 is controlled by controlling the opening and closing of each manual valve 3.

[0028] A cooling water circulation component is installed between the water inlet pipeline 9 and the water return pipeline 8. The cooling water circulation component is used to form a low-temperature medium circulation on the secondary side of the plate heat exchanger. According to different selected low-temperature water sources, the cooling water circulation component can have the following two structural forms, and the type is selected according to the conditions of the ship itself:

[0029] The first structural form uses low-temperature seawater as the cooling medium. At this time, the cooling water circulation component includes a circulation water pump, a suction pipe, and a drain pipe. The suction pipe and the drain pipe are located inside the ship's sea chest. The circulation water pump extracts low-temperature seawater from around the ship through the suction pipe, and after heat exchange in the plate heat exchanger, it is discharged through the drain pipe;

[0030] The second structural form uses prepared low-temperature clean water as the cooling medium. At this time, the cooling water circulation component includes a low-temperature water tank, a refrigeration unit, and a circulation water pump. The refrigeration unit prepares low-temperature clean water, and the circulation water pump establishes a circulation of the low-temperature clean water between the low-temperature water tank and the plate heat exchanger.

[0031] In this embodiment, a pressure relief component 7 is installed on the pipeline between the water return pipeline 8 and the secondary side outlets of the first plate heat exchanger 10 and the second plate heat exchanger 11. The pressure relief component 7 includes a pressure relief valve installed on the secondary side outlet pipeline and a pressure relief pipe connected to the outlets of the two pressure relief valves at the same time. The pressure relief component 7 is used to timely discharge a part of the cooling water source when the pressure is too high in the cooling water circulation, that is, on the secondary side of the plate heat exchanger, to protect the pipeline and the plate heat exchanger.

[0032] In this embodiment, a thermometer 12 and a flowmeter 13 are installed on the oil return pipeline 6, and a display 17 for displaying the oil return temperature and the oil return flow rate is also included. The thermometer 12 and the flowmeter 13 are connected to the display 17 through a wire harness 4. In this way, the ship engine control personnel can judge whether the forced lubrication system is in a normal operating state according to the oil return temperature and the oil return flow rate displayed on the display 17.

Claims

1. A forced lubrication system for the seal water pump bearing, characterized in that: It includes an oil supply pipeline (2) installed with a filter (5), a circulation oil pump (1), and a plate heat exchanger. One end of the oil supply pipeline (2) is connected to the oil outlet of the circulation oil pump (1), and the other end is connected to the primary side inlet of the plate heat exchanger. An oil return pipeline (6) is installed at the primary side outlet of the plate heat exchanger, a water inlet pipeline (9) is installed at the primary side inlet of the plate heat exchanger, and a water return pipeline (8) is installed at the primary side outlet of the plate heat exchanger; it also includes an oil return tank (14) and an oil supply tank (16). The oil return pipeline (6) is connected to the inlet of the oil return tank (14), the outlet of the oil supply tank (16) is connected to the inlet of the circulation oil pump (1) through a pipeline, the inlets of multiple seal water pump bearings (15) are connected to multiple outlets of the oil return tank (14) through pipelines, and the outlets of multiple seal water pump bearings (15) are connected to multiple inlets of the oil supply tank (16) through pipelines. A cooling water circulation component is installed between the water inlet pipeline (9) and the water return pipeline (8).

2. The forced lubrication system for the seal water pump bearing according to claim 1, characterized in that: The plate heat exchanger includes a first plate heat exchanger (10) and a second plate heat exchanger (11) arranged in parallel. The oil supply pipeline (2) is simultaneously connected to the primary side inlets of the two plate heat exchangers, the oil return pipeline (6) is simultaneously connected to the primary side outlets of the two plate heat exchangers, the water inlet pipeline (9) is simultaneously connected to the secondary side inlets of the two plate heat exchangers, and the water return pipeline (8) is simultaneously connected to the secondary side outlets of the two plate heat exchangers.

3. The forced lubrication system for the seal water pump bearing according to claim 2, wherein: in A bypass pipeline (18) is also provided on the side of the filter (5), and manual valves (3) are installed at the inlet and outlet of the filter (5) and on the bypass pipeline (18).

4. The forced lubrication system for the seal water pump bearing according to claim 3, characterized in that: A pressure relief component (7) is installed on the pipeline between the water return pipeline (8) and the secondary side outlets of the first plate heat exchanger (10) and the second plate heat exchanger (11). The pressure relief component (7) includes a pressure relief valve installed on the secondary side outlet pipeline and a pressure relief pipe simultaneously connected to the outlets of the two pressure relief valves.

5. The forced lubrication system for the seal water pump bearing according to claim 4, characterized in that: A thermometer (12) and a flowmeter (13) are installed on the oil return pipeline (6), and it also includes a display (17) for displaying the oil return temperature and the oil return flow rate. The thermometer (12) and the flowmeter (13) are connected to the display (17) through a wire harness (4).

6. The forced lubrication system for the seal water pump bearing according to any one of claims 1 to 5, characterized in that: The cooling water circulation component includes a circulation water pump, a water suction pipe, and a drain pipe. The water suction pipe and the drain pipe are located inside the ship's sea chest. The circulation water pump extracts low-temperature seawater from around the ship through the water suction pipe, and after heat exchange in the plate heat exchanger, it is discharged through the drain pipe.

7. The forced lubrication system for the seal water pump bearing according to any one of claims 1 to 5, characterized in that: The cooling water circulation component includes a low-temperature water tank, a refrigeration unit, and a circulation water pump. Clean water is used as the cooling medium. The refrigeration unit prepares low-temperature clean water, and the circulation water pump establishes a circulation of the low-temperature clean water between the low-temperature water tank and the plate heat exchanger.

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