JPS62268798A - Bearing lubrication device for ship's contra-rotating propeller - Google Patents

Abstract

PURPOSE:To grasp the operating condition of a static pressure bearing properly and improve safety by providing a static pressure bearing diagnosis thermometer capable of measuring the temperature of lube oil discharged via a lube oil discharge system exclusive for an inner shaft. CONSTITUTION:An oil discharge hole 20 is formed to make the inside of an outer shaft 2 continuous to the outside thereof and to be capable of discharging lube oil from clearance between the outer shaft 2 and an inner shaft 1, and a lube oil discharge pipe 38 is continuously provided between two seal lips of a sealing device 7 for discharging lube oil from the oil discharge hole 20. This hole 20 and said pipe 38 constitute a lube oil discharge system exclusive for the inner shaft 1. And the lube oil discharge pipe 38 is fitted with an inner shaft bearing diagnosis thermometer 39a for measuring the temperature of lube oil discharged via said system and an inner shaft diagnosis flowmeter 40a for measuring the flow quantity of lube oil similarly discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lubricating device for a bearing in a propeller shaft system of a counter-rotating marine propeller.

[Conventional technology]

In general, in a normal single-shaft ship, if oil lubrication by the pannier armrest is not possible due to reasons such as the propeller weight being large and the bearing surface pressure being extremely high, or the propeller sleeve rotating by a degree F, the method shown in Figure 2. A hydrostatic bearing as shown is used.

That is, a propeller shaft 1' having a propeller 5° attached to its rear end is disposed to pass through a stern frame 6', and is supported by a bearing bush 2' press-fitted into the stern frame 6'. A bearing metal (mainly white metal) 3'' is provided on the inner periphery of the bearing bush 2'', and a bokeh 8'' is formed at the lowest end of the inner circumferential surface. A hydrostatic bearing is constructed by supplying high-pressure lubricating oil to 8' from a high-pressure oil pump (not shown) through an oil supply pipe 7'.

In addition, in order to measure the temperature of the bearing metal 3', an electric wire M9' having a temperature detection part (not shown) at its tip is guided through the inside of the bearing bush 2° to near the bottom of the rearmost end of the bearing metal 3'. The base end of this Ti wire 9' is connected to a high temperature alarm device r1110' provided in the engine control room (not shown).

The propeller shaft 1' is connected to a propulsion motor (not shown) and rotationally driven by the motor.

Further, the reference numeral 4' in the figure indicates a sealing device.

According to this hydrostatic bearing, high-pressure lubrication is applied from the pocket 8' at the lowest end of the inner circumferential surface of the bearing bushing 2', where the propeller shaft 1' is deflected by the amount of ffl of the propeller 5', causing uneven contact. Oil is supplied, and the propeller shaft 1'' is forcibly floated by the lubricating oil, and the propeller shaft 1'' is lubricated, thereby preventing problems such as uneven contact.

In addition, the temperature detection section at the tip of the electric wire 9' constantly detects the temperature near the bottom of the rearmost end of the bearing metal 3', where uneven contact is most likely to occur. When this occurs and the temperature of the bearing metal 3' rises due to frictional heat, it is immediately detected and the high temperature alarm device 10' diagnoses the operating state of the bearing, such as an abnormality.

Hydrostatic bearings as described above have conventionally been applied to marine counter-rotating propeller shaft systems. This is to establish a counter-rotating bearing between the inner and outer shafts that rotate at a constant speed, where an oil film is theoretically difficult to form, even in a very low-speed one-sided contact state. In the counter-rotating propeller shaft system, as shown in Fig. 3, a tubular outer shaft 12'' supported in an outer shaft bearing 16'' and an inner shaft 11'' supported in the same outer shaft 12'. The inner shaft 11' and the outer shaft 12' are driven to rotate in opposite directions.In such a counter-rotating propeller shaft system, high pressure is applied to the inner shaft 11' from a hydraulic source (not shown). A lubricating oil passage 13' for guiding lubricating oil is formed, and the lubricating oil passage 13'' is communicated with a plurality of holes 14' formed radially in the inner shaft 11'. A hydrostatic bearing is constructed by tightening a small hole screw 15' having an orifice restricting function into the opening on the outer periphery. Here, in FIG. 3, the bearing metal and bearing bushing that constitute a part of the hydrostatic bearing are omitted from illustration.

In this type of hydrostatic bearing, high-pressure lubricating oil is supplied between the inner shaft 11' and the outer shaft 12' from a hydraulic source (not shown) via the lubricating oil passage 13' and the hole 14', and the bearing is The lubrication takes place as it is formed.

Normally, the inner shaft 11' and the outer shaft 12° are likely to come into contact at the bottom due to deflection, as shown in Figure 3, so it is necessary to ensure that high-pressure lubricating oil is supplied near this bottom. Therefore, a plurality of holes 14' are formed radially, and an extremely large amount of lubricating oil is supplied.

[The trouble that the invention attempts to solve]

However, in the conventional bearing lubrication device for a counter-rotating marine propeller as described above, since the inner shaft 11° and the outer shaft 12′ are inverted with respect to each other, up to the hydrostatic bearing within the outer shaft 12′, − It is difficult to derive the electric current &Q9° as in the case of shaft ships, and temperature measurement of hydrostatic bearings is extremely necessary.

In addition, in the case of a static pressure bearing for the inner shaft of a counter-rotating propeller shaft system, the temperature rise of the bearing metal and bearing bushing due to the mechanism means contact between the pongee and the bearing part that are reversed to each other, and the static pressure mechanism It is a terminal situation that has collapsed. Therefore, we have established a bearing diagnosis system specific to hydrostatic bearings in counter-rotating propeller shaft systems, which is similar to the temperature measurement of the bearing metal that was conventionally applied on the Yuzu ship, and allows us to constantly grasp the operating status of the hydrostatic bearings. It is hoped that this will be done.

In view of this situation, the present invention makes it possible to grasp the operating status of a hydrostatic bearing to a large degree from the temperature of lubricating oil, and to improve the performance of the hydrostatic bearing in a contra-rotating propeller shaft system with sufficient safety and reliability. The purpose of the present invention is to provide bearing lubrication vcrIi for marine contra-rotating propellers, which can be adopted in

[Means for solving problems]

For this reason, the bearing lubricating device for a counter-rotating marine propeller of the present invention has an inner shaft, a bearing buffet disposed on the outer periphery of the inner shaft, and a co-bearing bushing in a counter-rotating propeller shaft system provided at the stern of the ship. It is equipped with a hydrostatic pressure bearing consisting of a lees receiving metal provided in the inner shaft, and a tubular outer shaft arranged around the outer periphery of the hydrostatic pressure bearing. a lubricating oil supply system for supplying the lubricating oil to the hydrostatic bearing, and a lubricating oil discharge system exclusively for the inner shaft that can discharge the lubricating oil that has passed through the hydrostatic bearing from the gap between the outer shaft and the inner shaft, It is characterized by the provision of a hydrostatic bearing diagnostic thermometer that can measure the temperature of the lubricating oil discharged through the lubricating oil discharge system exclusively for the inner shaft.

[For production]

In the above-mentioned bearing lubricating device for a counter-rotating marine propeller of the present invention, the high-pressure lubricating oil supplied from the lubricating oil supply system lubricates the hydrostatic bearing, and then is discharged through the inner shaft exclusive lubricating oil discharge system. Then, the temperature of the discharged lubricating oil is measured by a thermometer for diagnosing a hydrostatic bearing, and the operating condition of the hydrostatic bearing is diagnosed based on the measured temperature.

〔Example〕

Hereinafter, a bearing lubricating device for a counter-rotating marine propeller as an embodiment of the present invention will be explained with reference to the drawings. In a marine contra-rotating propeller to which the device is applied, a tubular outer shaft 2 with a front propeller 4 at its rear end is disposed to penetrate through a stern frame 16, and is connected to the inner circumferential surface of the stern frame IG. The bow side outer shaft bearing 12 is interposed between the outer peripheral surface of the outer shaft 2 and is supported by the stern side outer shaft bearing 13. Among these bearings 12 and 13, the bow side outer shaft bearing 12 is configured as a normal stern tube bearing, while the stern side outer shaft bearing 13 is configured as a hydrostatic bearing.

Further, an inner shaft 1 having a rear propeller 3 at the rear end and having an inner shaft self-lubricating passage 18 passes through the outer shaft 2 and is disposed concentrically with the outer shaft 2. The stern inner shaft bearing 14 is interposed between the inner circumferential surface of the front end of the outer shaft 2 and the outer circumferential surface of the inner shaft 1. It is supported by the bow side inner shaft bearing 11 installed.

Each of these inner shaft bearings 11, 14 is a hydrostatic bearing consisting of bearing bushes 11a, 14a mounted on the outer periphery of the inner shaft 1, and a bearing metal (not shown) provided on the outer periphery of each bearing bush 11a, 14a. Constructed as.

The inner shaft 1 is connected to a reversing device (not shown), and the outer shaft 2 is also connected to a reversing device (not shown) via an outer shaft joint 10 and a hollow shaft 9 (not shown). The shaft 1 and the outer shaft 2 are connected to a main engine (not shown) via the reversing device, so that the propeller 3.4 can be rotated in opposite directions.

The outer shaft seal devices 6 and 7 are provided to close the gaps between the stern frame 1G and the outer shaft 2 outside and inside the ship, respectively, and the inner shaft seal devices r115 and 8 are installed inside the ship, respectively. Each bearing bush 14a of the inner shaft bearings 14 and 11 on the outside and inside the ship
, 11a, the gap between the outer shaft 2 and the inner shaft 1 is r'
These sealing devices 5
．． 8 is the outer shaft 2. In addition to preventing relative axial movement of the inner shaft 1 and the stand frame 1G,
It is designed to prevent lubricant from leaking into the eyes.

In the device of this embodiment for lubricating the bearings of the marine counter-rotating propeller shaft system as described above, as shown in FIG. but,
Inside the ship [one end thereof is connected to the high pressure oil supply pipe 36 via a rotary ridge (not shown), and in the vicinity of the inner shaft bearing 11.14, the inner shaft 1 is connected to the bearing bush l.
A large number of them are formed radially across la and 14a and are connected to one oil supply gob which communicates with the outer periphery of a bearing metal (not shown).

Furthermore, two high-pressure oil supply pipes are connected to the inner periphery of the outer shaft bearing 13 in communication.

The above-mentioned high-pressure oil supply pipe 29 and upper 136 each have a flow rate 'I! The high-pressure oil supply pipe 26 is connected to a high-pressure oil supply pipe 26 via four regulating valves 27, 27, and the high-pressure oil supply pipe 26 is connected to a high-pressure oil pump 2 that discharges high-pressure lubricating oil from a lubricating oil tank 21.
The high-pressure lubricating oil from the same high-pressure oil pump 22 is connected to the discharge port of No. 2 B, 36. It passes through the inner shaft self-lubrication passage 18 and the oil supply hole 19 to reach the inner shaft bearing 11.14 as a hydrostatic pressure bearing, and also passes through the high pressure oil supply pipes 26 and 29 to reach the outer shaft bearing 13 as a static pressure bearing. There is.

In this embodiment, the above-mentioned lubricating oil pump 22. A lubricating oil supply system is comprised of the high pressure oil supply pipes 2G, 29.3G, the inner shaft self-lubricating passage 18, the oil supply hole 19, and the like.

In addition, the high-pressure oil supply pipe 26 is provided with a check valve 24, and the high-pressure oil supply pipe 36 is provided with an oil filter 37 for detecting pressure.

A total of 28 were installed and nine were installed.

On the other hand, the outer shaft 2 has an outer shaft seal ¥3 in cra7.
Between the two seal lips on the rear end side of the two seal lips (i.e. each bearing bush l of inner shaft bearings 11 and 14)
At the other end gII) of the outer shaft 2, an oil drain hole 20 is formed to connect the inside and outside of the outer shaft 2 and discharge lubricating oil from the gap between the outer shaft 2 and the inner shaft 1. In the sealing device 7, a drain oil W38 for discharging lubricating oil from the oil drain hole 20 is connected between the two seal lips, and these oil drain holes 20 and the drain oil 1ff3 are connected to each other.
8 constitutes a lubricating oil discharge system exclusively for the inner shaft, and the oil drain pipe 38 includes an inner shaft bearing (static pressure A bearing) diagnostic thermometer 39a is installed, and an inner shaft bearing (static pressure bearing) diagnostic flow meter 40a is interposed to measure the flow rate of lubricating oil discharged through the inner shaft dedicated lubricating oil discharge system. has been done.

Further, in order to drain lubricating oil from the gap between the outer shaft 2 and the stand frame 1G, an oil drain pipe 31 is connected near between the outer shaft sealing device 7 and the outer shaft bearing 12, and an oil drain pipe 31 is connected to the outer shaft bearing 13. An oil drain pipe 30 is located near between and the outer shaft sealing device 6.
The oil drain pipe 30 is connected to the floating oil pipe 31 so as to merge with the oil drain pipe 31, and these oil drain pipes 30 and 31 constitute a lubricating oil discharge system exclusively for the outer shaft.

Then, in the oil drain pipe 30 downstream of α, which joins the oil drain pipe 30, there is an outer shaft bearing (i5 pressure bearing) for measuring the temperature of the lubricating oil discharged through the above-mentioned outer shaft dedicated lubricating oil discharge system.
A diagnostic thermometer 39b is attached, and an outer shaft bearing (iTII pressure bearing) bearing flow meter 40b is interposed to measure the flow rate of lubricating oil discharged through the outer shaft dedicated lubricating oil discharge system. There is.

In addition, drained oil ¥! 31 and 38 merge and are connected to a drain oil pipe 32, which is connected to the lubricating oil tank 21.

In addition, the bearing bush 11a in the inner shaft bearings 11 and 14
, lia are provided with oil drain grooves 1 ib and 14 b in order to guide lubricating oil flowing from the outside of the bearing metal toward the inner shaft seal device 8 or 5 to the oil drain hole 20 side. There are multiple formations.

Furthermore, a seal oil supply pipe 23 and a seal oil discharge pipe are installed between the two seal lips on the front end side among the three seal lips of the outer shaft seal assembly RA7 in order to lubricate these seal lips. 25 are connected, and these seal oil supply pipe 23 and seal oil discharge pipe 25 are in contact 112 with the seal oil tank 42.

In FIG. 1, reference numeral 15 is a rope guard, 17 is a rear bulkhead of the rocky opening room, 33 is a bypass oil drain pipe that is attached to the oil drain pipe 32 and is used in the event of a light stutter, and 34 is a seal oil supply #r! 23
．． Stop valves are installed in the seal oil drain pipe 25 and the bypass oil drain ff33, 35 is a sight glass installed in the oil drain pipe 32, and 41 is an air vent pipe attached to the oil drain pipe 32.

Since the bearing lubricating device for a marine counter-rotating oil paddle as a major embodiment of the present invention is constructed as described above, the lubricating oil stored in the lubricating oil tank 21 is pressurized by the high-pressure oil pump 22. The oil is then sent out from the high-pressure oil supply pipe 26 to the high-pressure oil supply pipes 36 and 29, respectively.

The lubricating oil supplied to the high-pressure oil supply pipe 36 flows into the inner shaft self-lubricating passage 18 of the inner shaft 1 through a rotary cylinder (not shown), and flows inside the oil supply passage 18 from the bow to the stern. , flows out from the numerous oil supply holes 19 to the outer circumferences of the bearing pushers 11a, 14a of the inner shaft bearings 11.14, and lubricates these inner shaft bearings 11.14. Note that when the lubricating oil passes through the high-pressure oil supply pipe 36, the supply oil pressure is measured by the pressure gauge 28.

and the bearing bush 11a of the inner shaft bearing 11.14.

After lubricating these inner shaft bearings 11.14, the high-pressure lubricating oil supplied to the outer circumference of each bearing bush 11m
, 14a, which flow toward the inner shaft sealing device 8°5 at one end side, and the bearing bushing 11a.

It is divided into one that flows out to the other end side of 14a.

The lubricating oil that leaked to the other end of the latter bearing bush 14m passes through the gap between the outer shaft 2 and the inner shaft 1, and flows through the oil drain hole 20 formed in the outer shaft 2 to the outer shaft. It is discharged to the outside of 2.

Also, the former seal equipped r! After lubricating the seal devices 5 and 8, the lubricating oil leaked to the bearing pusher zll
a, an oil drain groove 11b formed on the inner circumference of 14a;

Since the lubricating oil is guided to the other end of the bearing bushes lla and 14a through the lubricating oil 14b, this lubricating oil is also discharged to the outside of the outer shaft 2 through the oil drain hole 20 together with the latter lubricating oil.

As described above, remove the outer shaft 2 from the gap between the outer shaft 2 and the inner shaft 1.
The lubricating oil discharged to the outside lubricates the outer ring seal device 7 and is then discharged to the lubricating oil tank 21 through the oil drain pipes 38 and 32. However, when the lubricating oil is discharged through the oil drain pipe 38, With thermometer 39m and flowmeter 40a,
The temperature and flow rate of the lubricating oil used to lubricate the inner shaft bearings 11 and 14 are measured.

On the other hand, the lubricating oil fed to the high-pressure oil supply pipe 29 is supplied to the inner circumference of the outer shaft bearing 13 to lubricate the outer shaft bearing 13 and function as a static pressure bearing, and then directed to the bow side outer shaft bearing 12. It is divided into two types: one that flows out toward the outer shaft seal device fi6, and the other that flows out toward the outer shaft sealing device fi6.

Here, the lubricating oil that has flowed out toward the outer shaft bearing 12 on the bow side of the curver lubricates the outer shaft bearing 12 and is then discharged through the oil drain pipe 31.

Furthermore, the lubricating oil that has flowed out towards the latter outer shaft sealing device r11G lubricates the same sealing device 6, and then is discharged from the oil drain pipe 30, joins with the former lubricating oil in the oil drain pipe 31, and is further drained. The oil pipe 32 is discharged to the lubricating oil tank 21 together with the lubricating oil that has lubricated the inner shaft bearings 11 and 14. When the lubricating oil is discharged through the oil drain pipe 31, the temperature of the outer shaft is measured by the thermometer 39b and the flow meter 40b. The temperature and flow rate of the lubricating oil used to lubricate 12.13 are measured.

Note that the bow side outer shaft seal device fid7 is lubricated by natural convection through the seal oil supply pipe 23 and seal oil discharge pipe 25 connected to a dedicated seal oil tank 42, but the inner shaft bearing 11.14 is If the temperature of the lubricating oil discharged from the oil drain hole 20 is low enough to cool the seal lip sufficiently, the supply pipe 23. Discharge pipe 25
Also, the seal oil tank 42 may be omitted.

Furthermore, the lubricating oil from the high pressure oil pump 22 is supplied to the high pressure oil supply pipe 3.
The flow rate 'l! installed in G and 29, respectively. 4 valve control 27
, 27, the lubricating oil for the inner shaft bearing and the lubricating oil for the outer shaft bearing are appropriately distributed, and the respective distribution amounts are determined by the flowmeter 40a.
In this embodiment, the amount of lubricating oil for the inner shaft bearing is greater than the amount of lubricating oil for the outer shaft bearing.

As described above, in this embodiment, the inner shaft bearing 11. which is configured as a hydrostatic bearing in the contra-rotating propeller shaft system. ．． 14
Thermometer 3 indicates the temperature and flow rate of the lubricating oil used to lubricate the
9a and the flowmeter 40a, and the pressure gauge 28 also measures the supply oil pressure of lubricating oil, so that the operating status of the inner shaft bearings 11, 14 can always be grasped reliably. That is, when the oil supply hole 19 in the inner shaft bearing 11.14 is blocked, the flow rate of the lubricating oil discharged decreases and its temperature rises, so that the thermometer 39
a. The situation is diagnosed by the flow meter 40a. Also,
Two low sheaths occur on the inner circumferential surface of the outer shaft 2, and the inner shaft bearing 11
, 14 and the outer shaft 2 is wider than planned (if
As the supply oil pressure in the high-pressure oil supply pipe 36 decreases, the discharge flow rate of lubricating oil increases, so the pressure gauge 28. flow meter 40
The situation is diagnosed by a. Furthermore, if uneven contact occurs in the inner 411I holder 11.14, the temperature of the lubricating oil will rise due to the frictional heat. , the situation is diagnosed by the thermometer 39a.

In this way, the operating status of the inner shaft bearing 11.14 can be reliably grasped, and diagnosis can be made in the event that an abnormality occurs in the operating status. It can be adopted with high safety and reliability.

Also, regarding the outer shaft bearing 12, the inner shaft bearing 11 described above
．． 14, the thermometer 39b and the flowmeter 40b
As a result, the operating status can be grasped t1 and abnormalities can be diagnosed, and the co-pressure bearing can be used as the outer shaft bearing 12 with sufficient safety and reliability.

Furthermore, by making the outer shaft bearing 12 a hydrostatic pressure bearing and sharing its lubricating oil supply system with the lubricating oil supply system for the inner shaft bearings 11 and 14, shaft system alignment can be achieved.

The basic design and maintainability of the lubrication system are neglected.

Furthermore, since the high-pressure lubricating oil between the inner shaft 1 and the outer shaft 2 is reliably discharged, the inner shaft bearing 11.
14, a static pressure bearing can now be used without causing damage to the sealing device 5.8, and the inner shaft bearing 11.14 always (even during low speed rotation) regardless of the one-sided contact angle or bearing load. It becomes possible to form an oil film.

Therefore, seizure due to uneven contact, etc. can be reliably prevented, and the lubrication performance in the shaft system of the counter-rotating propeller is improved. In addition, there is no need to increase the shaft diameter of the inner shaft 1 in order to improve the one-sided contact 1) to 7+, and the shaft diameter can be kept below the rule diameter, so the entire counter-rotating propeller shaft system can be easily modified. Convenient and low cost) Combat Fl: The configuration will contribute to the island, propeller performance, and L.

In this embodiment, a hydrostatic bearing is used in which bearing bushes 11a and 14a are mounted on the outer periphery of the inner shaft 1 to supply lubricating oil to the outer periphery of the same bearing bushes 11a and L4a. The present device is similarly applied to a hydrostatic bearing in which 11 lubricating oils are attached to the inner periphery of the outer shaft 2 to supply lubricating oil to the inner periphery of the bearing bush.

〔Effect of the invention〕

As described in detail above, according to the bearing lubrication device for a counter-rotating marine propeller of the present invention, in the counter-rotating propeller shaft system-2 provided at the stern, the inner shaft and the It is equipped with a static pressure bearing consisting of a bearing psonyu installed in the bearing and a bearing metal installed in the same bearing bushochet, and a tubular outer shaft arranged around the outer periphery of the static pressure bearing. A lubricating oil supply system that supplies the above-mentioned hydrostatic bearing via the inner shaft of the shaft, and an inner shaft exclusive rri lubrication system that can discharge the lubricating oil that has passed through the above-mentioned hydrostatic bearing from the gap between the above-mentioned outer shaft and inner shaft. The simple configuration includes a hydrostatic bearing diagnostic thermometer that can measure the temperature of the lubricating oil discharged through the lubricating oil discharging system exclusively for the inner shaft, allowing you to check the operating status of the hydrostatic bearing. This allows us to reliably understand the operating status and diagnose any abnormalities that may occur, making it possible to use hydrostatic bearings as inner shaft bearings in counter-rotating propeller shaft systems with sufficient safety and reliability. This will allow you to collect m.

In addition, by using hydrostatic bearings, the diameter of the inner shaft can be kept below the rule diameter, making it possible to easily configure the entire counter-rotating propeller shaft system in a compact manner at low cost. There is also the advantage of significantly improved performance.

4 Explanation of rfj drawings FIG. 1 is a schematic vertical sectional view showing a bearing lubricating device for a contra-rotating marine propeller as an embodiment of the present invention.
The figure is a longitudinal cross-sectional view showing a static pressure bearing in a conventional single-shaft ship, and FIG. 3 is a cross-sectional view showing the main parts of a conventional bearing lubricating device for a marine double anti-pine propeller using a static IE bearing.

1...Inner shaft, 2...Outer shaft, 3...Rear propeller, 4...
Front propeller, 5... Seal device for inner shaft, 6.7... Seal device for outer shaft, 8... Seal device for inner-11, 9...
Split hollow shaft, 10...outer shaft joint, 11...bow side inner shaft bearing (static pressure bearing), lla...bearing bushier, 11b
・・Drain groove, 12.・Fore side outer shaft bearing (stern tube bearing),
13... Stern side outer shaft bearing (static pressure bearing), 14... Stern side inner pongee bearing (static pressure bearing), 14a... Bearing bushing, 14
b... Oil drain groove, 15... Rope guard, 16... Stun 7 frame, 17... Rear VA of engine room! ! ! , 18...
Inner shaft self-lubricating passage, 19...Oil supply hole, 2o...Oil drain hole, 2
1...Lubricating oil tank, 22...High pressure oil pump, 23...
Seal oil supply pipe, 24...Check valve, 25...Seal oil discharge pipe, 26...High pressure oil supply pipe, 27...Flow rate adjustment valve, 28
・・Pressure gauge, 2・・High pressure oil supply 7. 30-32・・・Drain pipe, 33・・Bypass oil drain pipe, 34・・Stop valve, 35・
・Sight glass, 36...High pressure oil supply pipe, 37...Oil ll
Z device, 38...Drain pipe, 39a...Inner shaft bearing (static pressure bearing) diagnostic thermometer, 391I...Outer shaft bearing (static pressure bearing) diagnostic thermometer, 40a...Inner shaft bearing (static pressure bearing) Bearing) diagnostic flow meter, 40b...outer shaft bearing (static pressure bearing) diagnostic flow meter,
41...Air vent pipe, 42...Seal oil tank.

Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 2 Figure 3

Claims (3)

[Claims] (1) In a counter-rotating propeller shaft system installed at the stern, a hydrostatic bearing consisting of an inner shaft, a bearing bush provided on the outer periphery of the inner shaft, and a bearing metal provided on the same bearing bush; a tubular outer shaft disposed around the outer periphery of the hydrostatic bearing; a lubricating oil supply system that supplies high-pressure lubricating oil to the hydrostatic bearing via the inner shaft; It is equipped with a lubricating oil discharge system exclusively for the inner shaft that can discharge the lubricating oil that has passed through the pressure bearing from the gap between the outer shaft and inner shaft, and the temperature of the lubricating oil discharged through the lubricating oil discharge system exclusively for the inner shaft is A bearing lubricating device for a contra-rotating marine propeller, characterized in that it is equipped with a thermometer for diagnosing hydrostatic bearings that can be measured. (2) A hydrostatic bearing diagnostic flow meter is provided which can measure the flow rate of lubricating oil discharged through the inner shaft dedicated lubricating oil discharge system, as set forth in claim 1. Bearing lubrication system for marine contra-rotating propellers. (3) An outer shaft hydrostatic bearing that supports the outer shaft, and a lubricating oil discharge system exclusively for the outer shaft that can discharge lubricating oil from the lubricating oil supply system via the outer shaft hydrostatic bearing. In addition, a thermometer and a flow meter are provided for diagnosing a hydrostatic bearing for an outer shaft, which can respectively measure the temperature and flow rate of lubricating oil discharged through the lubricating oil discharge system exclusively for the outer shaft. The bearing lubricating device for a marine contra-rotating propeller according to item 1 or 2.