Intelligent balance type ship tail shaft water lubrication circulation system

Abstract

The utility model discloses an intelligent balance type ship tail shaft water lubrication circulating system, and relates to the technical field of ship tail shaft lubrication. The water lubrication circulating system comprises a tail shaft pipe, a tail bearing, a tail shaft and a fresh water circulating unit used for lubricating and cooling the tail shaft pipe, and the fresh water circulating unit comprises a water tank and a main water inlet pipe communicated with the water tank and the tail shaft pipe. A first liquid pump, a filter and a servo proportional pressure valve used for adjusting water inlet pressure of the tail shaft pipe are sequentially arranged on the main water inlet pipe, a water return pipe is arranged between the other side of the tail shaft pipe and the water tank, and an electric heater is arranged at the bottom of the inner wall of one side of the water tank. Circulating fresh water lubricates and cools the tail bearing to prevent the tail bearing from rusting; the lubricated fresh water is filtered through the filter, so that the tail shaft tube is prevented from being blocked; the electric heater is arranged to prevent lubrication and cooling water from stopping working due to freezing in a low-temperature environment; and the servo proportional pressure valve is arranged, so that the water pressure in the tail shaft pipe can be adjusted, and the service life of the tail bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ship tail shaft lubrication, in particular to an intelligent balanced ship tail shaft water lubrication circulation system. Background Art

[0002] The function of the ship's stern bearing is to support the ship's propeller shaft. It is an important part of the ship's propulsion system and one of the key components that determine the ship's operating reliability and energy consumption. The water-lubricated stern bearing system is a type of ship's stern bearing system. It is usually an open lubrication system structure, which uses the natural seawater medium in the navigation area to lubricate and cool the stern bearing system. It has the advantages of simple structure, environmental friendliness, and saving a large amount of non-ferrous metals and mineral oils. It meets the development needs of energy conservation, environmental protection and green shipping, and has become the development trend of ship stern bearings.

[0003] The existing open lubrication system structure uses seawater in the navigation area to lubricate and cool the stern bearing. The seawater contains a lot of salt. Long-term use of seawater for lubrication and cooling can easily cause the stern bearing and the stern tube to rust, affecting the service life of the stern bearing and the stern tube; the seawater also contains a lot of impurities. When the seawater passes through the stern tube to lubricate and cool the stern bearing, the impurities in the seawater can easily cause the stern tube to be blocked, and the stern tube is easily damaged after being blocked; in addition, when the ship is sailing in an ultra-low temperature environment, the seawater used for lubricating and cooling the stern bearing freezes in the stern tube, and the stern bearing cannot be lubricated and cooled, and the stern bearing is also damaged; finally, the water pressure flowing into the stern tube is fixed. When the ship is overloaded, the water pressure in the stern tube is less than the water pressure outside the ship. At this time, the stern bearing will be subjected to a thrust from the inside to the outside, thereby shortening the service life of the stern bearing. Utility Model Content

[0004] The utility model aims to provide an intelligent balanced ship tail shaft water lubrication circulation system. The circulating lubrication system uses fresh water to lubricate and cool the tail bearing to prevent the tail bearing and the tail shaft tube from rusting; the lubricated fresh water is cooled by a constant temperature water cooler and filtered by a filter to prevent the clogging of the tail shaft tube; the setting of an electric heater prevents the problem that the lubricating and cooling water stops working due to freezing in an ultra-low temperature environment; the setting of a servo proportional pressure valve can adjust the water pressure in the tail shaft tube to extend the service life of the tail bearing.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an intelligent balanced ship stern shaft water lubrication circulation system, comprising a stern shaft tube and a stern bearing embedded in the stern shaft tube, a stern shaft is rotatably arranged on the stern bearing, and also comprising a fresh water circulation unit for lubricating and cooling the stern shaft tube, the fresh water circulation unit comprising a water tank, a main water inlet pipe is arranged between the water tank and one side of the stern shaft tube, a first liquid pump is arranged on the main water inlet pipe, a filter is arranged on the main water inlet pipe and located between the first liquid pump and the stern shaft tube, a servo proportional pressure valve for adjusting the stern shaft tube inlet pressure is arranged on the main water inlet pipe and located between the filter and the stern shaft tube, a return pipe is arranged between the other side of the stern shaft tube and the water tank, and an electric heater is arranged at the bottom of the inner wall of one side of the water tank.

[0006] Preferably, an auxiliary water inlet pipe connected to the main water inlet pipe is arranged in parallel at the bottom end of the main water inlet pipe, and a second liquid pump is arranged on the auxiliary water inlet pipe.

[0007] Preferably, a second pressure sensor is provided on the main water inlet pipe and between the servo proportional pressure valve and the tail shaft tube.

[0008] Preferably, a constant temperature water cooler is provided on the return water pipe.

[0009] Preferably, a temperature and liquid level sensor is provided at the bottom of the inner wall on the other side of the water tank.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. In the utility model, the existing open lubrication system structure is replaced with a circulating lubrication system. Fresh water is stored in a water tank. When lubricating and cooling the tail bearing, the fresh water in the water tank is transported to the tail tube through the main water inlet pipe by the first liquid pump or the second liquid pump. The fresh water lubricates and cools the tail bearing in the tail tube. The arrangement of lubricating and cooling the tail tube with fresh water prevents the tail bearing and the tail tube from rusting.

[0012] 2. In the utility model, the fresh water after lubrication and cooling of the tail bearing is transported to the water tank through the return pipe, and a constant temperature water cooler is arranged on the return pipe. The constant temperature water cooler cools down the fresh water after lubrication and cooling. When it is used again, the used fresh water in the water tank is transported to the tail tube through the main water inlet pipe again, and a filter is arranged on the main water inlet pipe. The water circulating in the water tank is filtered by the filter, ensuring that the cooling water entering the tail tube each time is high-quality fresh water without impurities, thereby improving the service life of the tail bearing.

[0013] 3. In the utility model, an electric heater is arranged in the water tank. When the ship is traveling in an ultra-low temperature environment, the fresh water in the water tank is heated by the electric heater and transported to the stern tube through the first liquid pump or the second liquid pump, thereby ensuring the normal lubrication and cooling of the stern bearing of the ship in a harsh environment. The setting of the electric heater avoids the problem that when the ship is traveling in an ultra-low temperature environment, the seawater freezes in the stern tube, the seawater cannot circulate in the stern tube, and the stern bearing cannot be lubricated and cooled.

[0014] 4. In the utility model, a pressure sensor is installed on the outboard stern column of the ship to monitor the water pressure outside the ship in real time. A second pressure sensor is arranged on the main water inlet pipe and located on the inner side of the stern tube to monitor the water pressure of the stern tube in real time. A servo proportional pressure valve is arranged on the main water inlet pipe and located on the inner side of the stern tube. The pressure sensor on the outboard stern column and the second pressure sensor are simultaneously connected to the control unit through a signal circuit. The output end of the control unit is connected to the servo proportional pressure valve through a signal circuit. The servo proportional pressure regulating valve on the control unit is adjusted by the PLC on the control unit to adjust the water inlet pressure of the stern tube. The servo proportional pressure regulating valve is used to adjust the water inlet pressure of the stern tube to be greater than the outboard pressure of the ship by 0.02MPa. When the ship is lightly loaded or heavily loaded, the water pressure in the stern tube changes with the change of the outboard water pressure of the ship. This dynamic balanced pressure change of the stern tube greatly avoids the change of the sealing bearing capacity caused by the change of the stern shaft receiving the draft pressure of the ship, thereby extending the service life of the stern bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the planar structure of the tail shaft tube and the tail shaft matching in the utility model;

[0016] Figure 2 It is the principle diagram of the water circulation system of the utility model.

[0017] In the figure:

[0018] 1- tail tube, 2- tail bearing, 3- cooling water inlet, 4- cooling water outlet, 5- tail shaft, 6- water tank, 7- main water inlet pipe, 8- first liquid pump, 9- auxiliary water inlet pipe, 10- second liquid pump, 11- filter, 12- first pressure sensor, 13- second pressure sensor, 14- servo proportional pressure valve, 15- flow monitor, 16- electromagnetic safety valve, 17- return pipe, 18- constant temperature water chiller, 19- electric heater, 20- level gauge, 21- temperature and level sensor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-2 As shown, an intelligent balanced ship tail shaft water lubrication circulation system includes a tail shaft tube 1, combined with Figure 1 As shown, a cooling water inlet 3 is provided on one side of the tail tube 1, and a cooling water outlet 4 is provided on the other side. Tail bearings 2 are embedded on both sides of the inner wall of the tail tube 1, and a tail shaft 5 is rotatably arranged between the two tail bearings 2. A fresh water circulation unit for lubricating and cooling the tail tube 1 is also included. Figure 1 and Figure 2 As shown, the fresh water circulation unit includes a water tank 6, a main water inlet pipe 7 is connected between the water tank 6 and the cooling water inlet 3, the main water inlet pipe 7 is respectively connected to the water tank 6 and the cooling water inlet 3, a first liquid pump 8 is arranged on the main water inlet pipe 7, an auxiliary water inlet pipe 9 connected to the main water inlet pipe 7 is arranged in parallel on the main water inlet pipe 7 and located outside the first liquid pump 8, and a second liquid pump 10 is arranged on the auxiliary water inlet pipe 9. Preferably, the first liquid pump 8 and the second liquid pump 10 are arranged as a backup to prevent When one of the liquid pumps is damaged, the normal use of the circulation system is affected. Further preferably, the existing open lubrication system structure is replaced with a circulating lubrication system structure. Fresh water is stored in the water tank 6. When the stern bearing 2 is lubricated and cooled, the fresh water in the water tank is transported to the stern tube 1 through the main water inlet pipe 7 by the first liquid pump 8 or the second liquid pump 10. The fresh water lubricates and cools the stern bearing 2 in the stern tube 1. The setting of lubricating and cooling the stern tube 1 with fresh water prevents the stern bearing 2 and the stern tube 1 from rusting.

[0021] Specifically in this embodiment, combined with Figure 1 and Figure 2 As shown, a filter 11 is provided on the main water inlet pipe 7 and between the first liquid pump 8 and the cooling water inlet 3. Preferably, the filter 11 can automatically clean impurities in the filter 11 when working in reverse. The filter 11 that automatically cleans impurities is a prior art and can be purchased on the market. No further elaboration is made here. The water circulating in the water tank 6 is filtered by the filter 11 to ensure that the cooling water entering the tail shaft tube 1 each time is high-quality fresh water without impurities, thereby improving the service life of the tail bearing 2. A first pressure sensor 12 is provided on the main water inlet pipe 7 and between the first liquid pump 8 and the filter 11. The first pressure sensor 12 is used to preliminarily measure the pressure of water discharged from the first liquid pump 8.

[0022] Specifically in this embodiment, combined with Figure 1 and Figure 2 As shown, a servo proportional pressure valve 14 for adjusting the water inlet pressure of the stern tube 1 is arranged on the main water inlet pipe 7 and between the filter 11 and the cooling water inlet 3, and a second pressure sensor 13 is arranged on the main water inlet pipe 7 and between the servo proportional pressure valve 14 and the cooling water inlet 3. Preferably, a pressure sensor is installed on the outboard stern column of the ship to monitor the water pressure outside in real time, and the second pressure sensor 13 monitors the water pressure of the stern tube 1 in real time. The pressure sensor on the outboard stern column and the second pressure sensor 13 are simultaneously connected to the control unit through a signal circuit, and the output end of the control unit is connected to the servo proportional pressure valve 14 through the signal circuit. The servo proportional pressure regulating valve 14 on the control unit is adjusted by the PLC on the control unit to adjust the water inlet pressure of the stern tube 1, and the servo proportional pressure regulating valve 14 is adjusted to adjust the water inlet pressure of the stern tube 1. The water inlet pressure of the stern tube is greater than the outboard pressure of the ship by 0.02MPa. When the ship is lightly loaded or heavily loaded, the water pressure in the stern tube 1 changes with the change of the outboard water pressure of the ship. The dynamic balanced pressure change of the stern tube 1 greatly avoids the change of the sealing bearing capacity of the stern bearing 2 caused by the change of the draft pressure of the ship, thereby extending the service life of the stern bearing 2. It should be noted that: the pressure sensor on the outboard stern column, the second pressure sensor 13 and the signal circuit control of the servo proportional pressure valve 14 are all existing technologies. The setting of the servo proportional pressure valve 14 to control the water inlet pressure of the stern tube 1 to always be greater than the external pressure of 0.02MPa can be achieved by writing a PLC program for the servo proportional pressure valve 14. At the same time, they are also existing technologies and are not the focus of protection of this technical solution. No further elaboration will be made here.

[0023] Specifically in this embodiment, combined with Figure 2 As shown, a flow monitor 15 is provided on the main water inlet pipe 7 and located between the filter 11 and the servo proportional pressure valve 14. The flow monitor 15 is used to detect the flow rate of water in the main water inlet pipe 7. An electromagnetic safety valve 16 is provided on the main water inlet pipe 7 and located between the servo proportional pressure valve 14 and the second pressure sensor 13. The electromagnetic safety valve 16 protects water during the process of water transportation by the main water inlet pipe 7.

[0024] Specifically in this embodiment, combined with Figure 1 and Figure 2 As shown, a return pipe 17 is provided between the cooling water outlet 4 and the water tank 6, and a constant temperature water cooler 18 is provided on the return pipe 17. Preferably, when the fresh water after cooling and lubricating the tail bearing 2 flows into the water tank 6 through the return pipe 17, the constant temperature water cooler 18 cools down the fresh water after lubrication and cooling.

[0025] Specifically in this embodiment, combined with Figure 2 As shown, an electric heater 19 is provided at the bottom of the inner wall of one side of the water tank 6. Preferably, when the ship is traveling in an ultra-low temperature environment, the fresh water in the water tank 6 is heated by the electric heater 19, and the fresh water in the water tank 6 is transported to the stern tube 1 through the first liquid pump 8 or the second liquid pump 10, thereby ensuring the normal lubrication and cooling of the stern bearing 2 by fresh water in the ship under harsh environments. The setting of the electric heater 19 avoids the problem that when the ship is traveling in an ultra-low temperature environment, the seawater freezes in the stern tube 1, the seawater cannot circulate in the stern tube 1, and the stern bearing 2 cannot be lubricated and cooled.

[0026] Specifically in this embodiment, combined with Figure 2 As shown, a liquid level gauge 20 for observing the water level in the water tank 6 is provided on the outer wall of the water tank 6, and a temperature and liquid level sensor 21 is provided at the bottom of the inner wall on the other side of the water tank 6. Preferably, when the tail bearing 2 is damaged, if the water pressure in the tail tube 1 is higher than the external water pressure, the fresh water in the tail tube 1 flows into the outside through the tail bearing 2, causing the water level in the water tank 6 to be low. The temperature and liquid level sensor 21 detects that the water level in the water tank 6 is low, and then transmits the signal to the control unit through the control line, and then the control unit transmits the signal to the external alarm light through the control line to complete the alarm action. It should be noted that: the connection structure of detecting the signal of the water level in the water tank 6 by the temperature and liquid level sensor 21 and controlling the alarm light to work through the detection signal through the control unit is prior art and will not be elaborated on here.

[0027] Working principle:

[0028] When cooling and lubricating the tail bearing 2 in the tail tube 1, the first liquid pump 8 is started first. When the first liquid pump 8 is working, the fresh water in the water tank 6 is transported to the filter 11 through the main water inlet pipe 7. The fresh water in the water tank 6 is filtered of impurities by the filter 11. The fresh water filtered out from the filter 11 flows into the tail tube 1 through the flow monitor 15, the servo proportional pressure valve 14, the electromagnetic safety valve 16 and the second pressure sensor 13 in sequence. When the filtered fresh water passes through the second pressure sensor 13 through the main water inlet pipe 7, the second pressure sensor 13 applies lateral pressure to the fresh water flowing through, so that the pressure of the fresh water entering the tail tube 1 is greater than the external water pressure. The pressure of the fresh water entering the tail tube 1 is achieved by the control of the servo proportional pressure valve 14. The fresh water entering the tail tube 1 cools the tail bearing 2 in the tail tube 1. The fresh water after cooling and lubricating the tail bearing 2 is delivered to the constant temperature water cooler 18 through the return pipe 17, and the high temperature water temperature is reduced to normal temperature by the constant temperature water cooler 18 and then delivered to the water tank 6 through the return pipe 17, and then the above-mentioned circulation work is carried out, thereby maintaining the lubrication and cooling of the tail bearing 2 in the tail tube 1. When the ship is traveling in a harsh ultra-low temperature environment, the fresh water in the water tank 6 is heated by the electric heater 19 in the water tank 6, thereby ensuring constant temperature cooling and lubrication of the tail bearing 2. In addition, the water level of the water tank 6 can be observed by the liquid level gauge 20 on the water tank 6, and the water level of the water tank 6 can be intelligently detected by the temperature liquid level sensor 21. When the water level of the water tank 6 is low, the signal is delivered to the alarm light through the control circuit, and the alarm light sends a maintenance signal to the staff. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the utility model is limited by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any reference numerals in the claims should not be regarded as limiting the claims involved.

Claims

1. An intelligent balanced ship tail shaft water lubrication circulation system, comprising a tail shaft tube (1) and a tail bearing (2) embedded in the tail shaft tube (1), wherein a tail shaft (5) is rotatably arranged on the tail bearing (2), characterized in that: The invention also comprises a fresh water circulation unit for lubricating and cooling the stern tube (1), the fresh water circulation unit comprising a water tank (6), a main water inlet pipe (7) being arranged between the water tank (6) and one side of the stern tube (1), a first liquid pump (8) being arranged on the main water inlet pipe (7), a filter (11) being arranged on the main water inlet pipe (7) and between the first liquid pump (8) and the stern tube (1), a servo proportional pressure valve (14) for adjusting the water inlet pressure of the stern tube (1) being arranged on the main water inlet pipe (7) and between the filter (11) and the stern tube (1), a return water pipe (17) being arranged between the other side of the stern tube (1) and the water tank (6), and an electric heater (19) being arranged at the bottom of the inner wall of one side of the water tank (6).

2. According to claim 1, the intelligent balanced ship tail shaft water lubrication circulation system is characterized by: An auxiliary water inlet pipe (9) connected to the main water inlet pipe (7) is arranged in parallel at the bottom end of the main water inlet pipe (7), and a second liquid pump (10) is arranged on the auxiliary water inlet pipe (9).

3. According to claim 1, the intelligent balanced ship tail shaft water lubrication circulation system is characterized by: A second pressure sensor (13) is provided on the main water inlet pipe (7) and is located between the servo proportional pressure valve (14) and the stern tube (1).

4. According to claim 1, the intelligent balanced ship tail shaft water lubrication circulation system is characterized by: The return water pipe (17) is provided with a constant temperature water cooler (18).

5. According to claim 1, the intelligent balanced ship tail shaft water lubrication circulation system is characterized by: A temperature and liquid level sensor (21) is provided at the bottom of the inner wall on the other side of the water tank (6).

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