Novel lubricating device for thrust bearing

Abstract

The utility model relates to a novel lubricating device for a thrust bearing. The novel lubricating device comprises an outer shell; the thrust shaft is rotatably installed in the outer shell, and a first cavity used for installing the supporting bearing bush is formed between the thrust shaft and the outer shell; a thrust disc extending in the radial direction is arranged in the middle of the thrust shaft. The lantern ring is fixedly installed in the outer shell, and a second cavity used for installing the thrust bearing is formed between the lantern ring and the thrust disc; the oil spraying pipe is located in the second cavity and connected with the lantern ring, an oil spraying hole is formed in the oil spraying pipe, and the oil spraying hole faces the end wall of the thrust disc; the rapid cooling effect on an oil film is achieved through the oil spraying pipe which sprays oil to the end wall of the thrust disc at a high speed, an efficient directional cooling lubricating mechanism is formed, sprayed cold oil can exchange heat with a hot oil film, the temperature of the oil film is reduced, the problem that the temperature of the oil film is too high due to untimely lubrication is solved, and the service life of the thrust disc is prolonged. And the abrasion or ablation phenomenon of the thrust bearing is prevented.

Description

Technical Field

[0001] This application relates to the field of bearing lubrication technology, and in particular to a novel lubrication device for thrust bearings. Background Technology

[0002] Thrust bearings in ship shafting are critical components of ship propulsion systems. They primarily bear the axial thrust generated by the propeller and transmit it to the hull structure, while ensuring the smooth operation of the shafting. During the operation of ship shafting thrust bearings, the lubrication effect of the lubricating oil is crucial to ensuring stable bearing operation.

[0003] Currently, existing lubrication methods for ship shaft thrust bearings include forced pressure lubrication and oil bath lubrication. In forced lubrication, pressure is typically provided by an oil pump, and lubricating oil is delivered through pipelines to the working chamber of the bearing bush. The lubricating oil flows naturally through the bearing bush gaps, forming an oil film to reduce bearing bush friction. However, due to the multiple bearing bushes and the inability of existing forced lubrication methods to distribute the lubricating oil throughout the bearing, the lubricating oil easily generates heat due to friction under high-speed rotation and high-load conditions. This prevents the oil film between the preceding bearing bush and the thrust shaft from cooling down in time, causing it to enter the space between the following bearing bush and the thrust shaft. This results in a continuous increase in lubricating oil temperature, leading to bearing overheating, bearing bush wear or burning, and affecting the normal operation of the bearing. Utility Model Content

[0004] In order to solve the problem mentioned in the background art that existing thrust bearings are prone to wear or burning due to untimely cooling, this application provides a novel lubrication device for thrust bearings.

[0005] This application provides a novel lubrication device for thrust bearings, employing the following technical solution:

[0006] A novel lubrication device for thrust bearings, comprising:

[0007] outer shell;

[0008] A thrust shaft is rotatably mounted inside a housing, and a first cavity for mounting a support bearing is formed between the thrust shaft and the housing; the thrust shaft has a thrust disc extending radially in its middle section.

[0009] A collar is fixedly installed inside the outer casing, and a second cavity for installing a thrust bearing is formed between the collar and the thrust disk.

[0010] The fuel injection pipe is located in the second cavity and connected to the collar. It is equipped with fuel injection holes facing the end wall of the thrust plate.

[0011] The lubricating oil pumping system includes an oil inlet pipe that is connected to a first cavity and a second cavity respectively. The oil inlet pipe is connected to the outer shell, and the lubricating oil can pass through the side wall of the outer shell and enter the inner cavity of the outer shell. Part of the lubricating oil enters the first cavity for lubricating the support bearing, and another part of the lubricating oil enters the oil spray pipe in the second cavity and is sprayed onto the surface of the thrust plate from the oil spray hole.

[0012] By adopting the above technical solution, the oil injection pipe can spray lubricating oil at high speed to the end wall of the thrust plate, so that the sprayed cold lubricating oil can cool the oil film temperature between the thrust bearing and the thrust plate, avoiding the problem of excessive oil film temperature due to untimely lubrication, and preventing wear or burning of the thrust bearing.

[0013] Optionally, the outer casing includes a detachably connected upper casing and a lower casing, with a main oil chamber located at the bottom of the lower casing;

[0014] The lubricating oil pumping system is installed on the outer casing and includes an oil suction pipe connected to the main oil chamber. At least one oil pump is connected to the end of the oil suction pipe. The output end of the oil pump is connected to a filter through a pipe, and the filter is connected to the oil inlet pipe through a pipe.

[0015] By adopting the above technical solution, an oil pump is mainly used as the power source to provide power for the entire lubrication system, so that the lubricating oil can enter the working area of ​​the bearing through the oil inlet pipe.

[0016] Optionally, the oil inlet pipe includes two first oil inlet pipes and two second oil inlet pipes. The pipes output from the filter are connected to the first oil inlet pipes and the second oil inlet pipes in parallel. The two first oil inlet pipes are respectively connected to the first oil inlet ports opened on both sides of the upper housing, and the first oil inlet ports are connected to the first cavity. The two second oil inlet pipes are respectively connected to the second oil inlet ports opened on both sides of the upper housing, and the second oil inlet ports are connected to the fuel injection pipes arranged in the second cavity.

[0017] By adopting the above technical solution, the first and second oil inlets on the surface of the upper housing are used as oil inlet channels, so that the lubricating oil can quickly enter the bearing working area and avoid pressure loss caused by excessively long oil passages.

[0018] Optionally, the inner wall of the upper housing has a recessed groove, the inner cavity of the groove is connected to the first oil inlet, the groove is arc-shaped around the center of the thrust shaft, and the end of the groove extends through the edge of the upper housing; an annular groove is provided on the inner wall of the outer housing and located in the first cavity.

[0019] By adopting the above technical solution, the lubricating oil entering the first cavity from the first oil inlet can first enter the groove, flow along the groove and flow to the working area of ​​the supporting bearing, which has the advantage of good lubrication effect.

[0020] Optionally, the outer wall of the collar is provided with an annular oil groove, which is connected to the second oil inlet. An oil guide hole is provided at the root of the oil groove, which runs through the collar axially. The internal cavity of the fuel injection pipe is connected to the inner cavity of the oil guide hole.

[0021] By adopting the above technical solution, the oil trough can be set up so that the lubricating oil can be evenly distributed in the oil trough and enter different oil injection pipes, thereby cooling the oil film in different areas. The cooling efficiency is high and the effect is good.

[0022] Optionally, a side plate is installed on the outer wall of the collar, which can seal the open end of the oil tank.

[0023] By adopting the above technical solution, the side plate is mainly used to prevent lubricating oil from leaking out of the oil tank, thus achieving a sealing effect.

[0024] Optionally, the number of fuel injection pipes is multiple and they are evenly distributed around the center of the thrust shaft.

[0025] By adopting the above technical solution, oil films at different locations can be cooled uniformly at the same time. More preferably, the number of fuel injection pipes is located between two adjacent thrust bearings, which can improve the cooling efficiency.

[0026] Optionally, one end of the fuel injection pipe is an open structure for fuel inlet, and the other end is a closed structure. The fuel injection pipe is installed at the end of the collar and near the outer edge. The end of the fuel injection pipe extends radially along the thrust shaft and toward the root of the thrust disc. The fuel injection pipe has multiple fuel injection holes arranged at equal intervals.

[0027] By adopting the above technical solution, one end of the oil injection pipe is blocked, mainly to prevent lubricating oil from flowing out of the end and to spray it out only from the oil injection hole, so as to improve the efficiency of lubricating oil use. The design of multiple oil injection holes can uniformly spray the oil film in the same area, expand the coverage area, and improve the cooling effect.

[0028] Optionally, the lower housing has a first oil outlet at the bottom of the first cavity and a second oil outlet at the bottom of the second cavity. The first and second oil outlets are respectively connected to the oil return chamber. The bottom of the oil return chamber has a third oil outlet, which is connected to the main oil chamber at the bottom of the lower housing.

[0029] By adopting the above technical solution, the lubricating oil in the first cavity where the support bearing is located can be discharged from the first oil outlet, and the lubricating oil in the second cavity where the thrust bearing is located can be discharged from the second oil outlet. The lubricating oil from both places flows into the return oil chamber first, and then flows into the main oil chamber as a whole. This centralized return oil method makes the return oil channel more compact, the return oil efficiency is high, and the maintenance difficulty can also be reduced.

[0030] Optionally, the third oil outlet is located on the bottom wall of the oil return chamber, away from the side of the oil suction pipe.

[0031] Optionally, a cooling device is installed in the main oil chamber.

[0032] By adopting the above technical solution, the lubricating oil entering the main oil chamber is cooled by a cooling device, and the third oil outlet is set on the side away from the oil suction pipe. This is mainly to ensure that the lubricating oil is fully cooled before entering the oil suction pipe, avoiding thermal short circuit, thereby improving the cooling efficiency of the lubricating oil, reducing the oil temperature, and ensuring that the oil re-entering the first and second cavities maintains the best viscosity and lubrication performance.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] This invention achieves rapid cooling of the oil film by spraying oil at high speed onto the thrust disc end wall through an oil injection pipe, forming an efficient directional cooling and lubrication mechanism. The sprayed cold oil can exchange heat with the hot oil film, reducing the oil film temperature and avoiding the problem of excessively high oil film temperature due to untimely lubrication, thus preventing wear or burning of the thrust bearing. Attached Figure Description

[0035] Figure 1 This is a perspective view of the present invention;

[0036] Figure 2 This utility model relates to a three-dimensional lubricating oil pumping system. Figure 1 ;

[0037] Figure 3 This utility model relates to a three-dimensional lubricating oil pumping system. Figure 2 ;

[0038] Figure 4 This is a front view of the lubricating oil pumping system of this utility model;

[0039] Figure 5 This is an exploded view of the present invention;

[0040] Figure 6 This is a cross-sectional view of the present invention;

[0041] Figure 7 This is a longitudinal sectional view of the present invention;

[0042] Figure 8 This is a perspective view of the lower shell of this utility model;

[0043] Figure 9 This is a perspective view of the lower shell of this utility model in cross-section;

[0044] Figure 10 This is a longitudinal sectional view of the lower shell of this utility model;

[0045] Figure 11 This is a transverse sectional view of the lower shell of this utility model;

[0046] Figure 12 It is a three-dimensional upper shell of this utility model. Figure 1 ;

[0047] Figure 13 It is a three-dimensional upper shell of this utility model. Figure 2 ;

[0048] Figure 14 This utility model is a three-dimensional collar. Figure 1 ;

[0049] Figure 15 This utility model is a three-dimensional collar. Figure 2 ;

[0050] Figure 16 This is a perspective view of the fuel injection pipe of this utility model;

[0051] Figure 17 This is a cross-sectional view of the fuel injection pipe of this utility model.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Lower housing; 101. First oil outlet; 102. Second oil outlet; 103. Third oil outlet; 104. Oil return chamber; 105. Main oil chamber;

[0054] 2. Thrust shaft;

[0055] 3. Side panels;

[0056] 4. Collar; 401. Oil groove; 402. Oil guide hole;

[0057] 5. Fuel injection pipe; 501. Fuel injection hole;

[0058] 6. Upper housing; 601. First oil inlet; 602. Second oil inlet; 603. Groove;

[0059] 7. Oil suction pipe; 8. Oil pump; 9. Filter; 10. First oil inlet pipe; 11. Second oil inlet pipe; 12. Support bearing; 1201. Third oil inlet. Detailed Implementation

[0060] The present application will be further described in detail below with reference to the accompanying drawings.

[0061] like Figure 1-17 As shown in the figure, this application discloses a novel lubrication device for thrust bearings, comprising:

[0062] The outer casing includes a detachably connected upper casing 6 and a lower casing 1, which are bolted together. The bottom of the lower casing 1 has a main oil chamber 105, which contains a cooling device. The cooling device is mainly a coil containing a flowable cooling medium for heat exchange with the lubricating oil and cooling it. The specific structure and principle of the cooling device are conventional methods in the prior art and will not be described in detail here.

[0063] The thrust shaft 2 is rotatably mounted inside the housing, and a first cavity for mounting the support bearing is formed between the thrust shaft 2 and the housing; the thrust shaft 2 has a thrust disc extending radially in the middle, which is integrally formed with the thrust shaft 2 and mainly bears the axial bidirectional load.

[0064] The collar 4 is fixedly installed inside the outer casing. A second cavity for installing the thrust bearing is formed between the collar 4 and the thrust disk. In this example, for ease of installation, the collar 4 is designed as a ring structure formed by two half-rings connected together. Stepped structures are provided at the inner and outer edges of one end to facilitate the installation of the thrust bearing.

[0065] The fuel injection pipe 5 is located in the second cavity and connected to the collar 4. It is equipped with fuel injection holes 501 facing the end wall of the thrust disk. Specifically, in this example, there are multiple fuel injection pipes 5, which are evenly distributed around the center of the thrust shaft 2 to achieve a uniform spray effect on the end wall of the thrust disk. More specifically, one end of the fuel injection pipe 5 is an open structure for fuel inlet, and the open end is fixed to the side wall edge of the collar 4 by bolt connection. The other end is a sealed structure. The fuel injection pipe 5 is installed at the end of the collar 4 near the outer edge. The end of the fuel injection pipe 5 extends radially along the thrust shaft 2 and toward the root of the thrust disk. There are multiple fuel injection holes 501 on the fuel injection pipe 5, which are arranged at equal intervals. In this example, there are three fuel injection holes 501. In other embodiments, different numbers of fuel injection holes 501 can be provided to achieve a uniform spray effect on the same area.

[0066] The lubricating oil pumping system includes an oil inlet pipe that is connected to the first cavity and the second cavity respectively. The oil inlet pipe is connected to the outer shell, and the lubricating oil can pass through the side wall of the outer shell and enter the inner cavity of the outer shell. Part of the lubricating oil enters the first cavity for lubricating the support bearing, and another part of the lubricating oil enters the oil spray pipe 5 in the second cavity and is sprayed onto the surface of the thrust plate from the oil spray hole 501.

[0067] The lubricating oil pumping system is installed on the outer casing and includes an oil suction pipe 7 connected to the main oil chamber 105. At least one oil pump 8 is connected to the end of the oil suction pipe 7. In this example, there are two oil pumps 8, namely a main oil pump 8 and a standby oil pump 8, which are used to select the standby oil pump 8 to work when one of the oil pumps 8 fails, so as to prevent downtime. The output end of the oil pump 8 is connected to the filter 9 through a pipe, and the filter 9 is connected to the oil inlet pipe through a pipe.

[0068] Specifically, the oil inlet pipe includes two first oil inlet pipes 10 and two second oil inlet pipes 11. The pipes output from the filter 9 are connected to the first oil inlet pipes 10 and the second oil inlet pipes 11 in parallel. That is, in this example, the pipes output from the filter 9 are divided into four parts, which enter the areas on both sides of the thrust plate, so as to achieve the lubrication effect of the support bearings and the thrust bearings on both sides at the same time. The two first oil inlet pipes 10 are respectively connected to the first oil inlet ports 601 opened on both sides of the upper housing 6. The first oil inlet ports 601 are connected to the first cavity and are used to lubricate the area where the support bearings are located. The two second oil inlet pipes 11 are respectively connected to the second oil inlet ports 602 opened on both sides of the upper housing 6. The second oil inlet ports 602 are connected to the oil injection pipes 5 set in the second cavity.

[0069] Specifically, the inner wall of the upper housing 6 has a recessed groove 603. The inner cavity of the groove 603 is connected to the first oil inlet 601. The groove 603 is arc-shaped around the center of the thrust shaft 2, and its end extends through the edge of the upper housing 6. This arrangement allows the oil introduced from the first oil inlet 601 to first enter the groove 603 and flow along it. Then, it enters the third oil inlet 1201 circumferentially opened on the support bearing 12, and finally enters the gap between the support bearing 12 and the thrust shaft 2, thus achieving lubrication. An annular groove 604 is provided on the inner wall of the outer housing and located in the first cavity. This annular groove 604 is connected to the first oil outlet 101 and is mainly used for oil return.

[0070] Specifically, the outer wall of the collar 4 is provided with an annular oil groove 401, which is connected to the second oil inlet 602. At the root of the oil groove 401, there is an axially penetrating oil guide hole 402. The internal cavity of the oil injection pipe 5 is connected to the inner cavity of the oil guide hole 402. A side plate 3 is installed on the outer wall of the collar 4. The side plate 3 can seal the open end of the oil groove 401. The side plate 3 is installed on the side wall of the collar 4 by bolt connection, which can fit tightly with the collar 4 to prevent oil from leaking out from the oil groove 401.

[0071] Specifically, the lower housing 1 has a first oil outlet 101 at the bottom of the first cavity and a second oil outlet 102 at the bottom of the second cavity. The first oil outlet 101 and the second oil outlet 102 are respectively connected to the return oil chamber 104. The bottom of the return oil chamber 104 has a third oil outlet 103, which is connected to the main oil chamber 105 at the bottom of the lower housing 1. The inner wall of the lower housing 1 where the first oil outlet 101 is located has an arc-shaped groove structure (annular groove 604). The lubricating oil discharged from the bearing support area can first enter the groove structure and then flow downward from the first oil outlet 101 to the return oil chamber 104. The second oil outlet 102 is located in the middle of the lower housing 1, and there are two of them. Due to the rotation of the thrust plate, the lubricating oil flows to the circumference of the thrust plate under the action of centrifugal force. When the lubricating oil rotates to the lower position with the thrust plate, it can be discharged from the second oil outlet 102 under the action of gravity and flows to the return oil chamber 104. After the lubricating oil from both places is collected in the return oil chamber 104, it finally flows into the main oil chamber 105.

[0072] Specifically, the third oil outlet 103 is located on the bottom wall of the return oil chamber 104 and away from the oil suction pipe 7. Since a cooling device is installed in the main oil chamber 105, the lubricating oil discharged from the third oil outlet 103 is hot oil. Hot oil needs to be cooled before reuse. Therefore, setting the third oil outlet 103 away from the oil suction pipe 7 can fully cool the oil and improve the cooling efficiency.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel lubricating device for a thrust bearing, characterized by, include: outer shell; A thrust shaft (2) is rotatably mounted inside the housing, and a first cavity for mounting a support bearing is formed between the thrust shaft (2) and the housing; the thrust shaft (2) has a thrust disc extending radially in the middle. A collar (4) is fixedly installed inside the outer shell, and a second cavity for installing a thrust bearing is formed between the collar (4) and the thrust disc; The oil injection pipe (5) is located in the second cavity and connected to the collar (4). It is equipped with an oil injection hole (501) facing the end wall of the thrust plate. The lubricating oil pumping system includes an oil inlet pipe that is connected to the first cavity and the second cavity respectively. The oil inlet pipe is connected to the outer shell, and the lubricating oil can pass through the side wall of the outer shell and enter the inner cavity of the outer shell. Part of the lubricating oil enters the first cavity for lubricating the support bearing, and another part of the lubricating oil enters the oil spray pipe (5) in the second cavity and is sprayed from the oil spray hole (501) onto the surface of the thrust plate.

2. A novel lubricating device for a thrust bearing according to claim 1, characterized in that The outer shell includes a detachably connected upper shell (6) and a lower shell (1), and the bottom of the lower shell (1) is provided with a main oil chamber (105). The lubricating oil pumping system is installed on the outer casing and includes an oil suction pipe (7) connected to the main oil chamber (105). At least one oil pump (8) is connected to the end of the oil suction pipe (7). The output end of the oil pump (8) is connected to the filter (9) through a pipe. The filter (9) is connected to the oil inlet pipe through a pipe.

3. A novel lubricating device for thrust bearing as claimed in claim 2, wherein, The oil inlet pipe includes two first oil inlet pipes (10) and two second oil inlet pipes (11). The pipes output from the filter (9) are connected to the first oil inlet pipes (10) and the second oil inlet pipes (11) in parallel. The two first oil inlet pipes (10) are connected to the first oil inlet ports (601) opened on both sides of the upper housing (6), and the first oil inlet ports (601) are connected to the first cavity. The two second oil inlet pipes (11) are connected to the second oil inlet ports (602) opened on both sides of the upper housing (6), and the second oil inlet ports (602) are connected to the oil injection pipe (5) set in the second cavity.

4. A novel lubricating device for a thrust bearing according to claim 3, characterized in that The inner wall of the upper housing (6) has a recessed groove (603), the inner cavity of the groove (603) is connected to the first oil inlet (601), the groove (603) is arc-shaped around the center of the thrust shaft (2), and the end of the groove (603) passes through the edge of the upper housing (6); an annular groove (604) is provided on the inner wall of the outer shell and located in the first cavity.

5. A novel lubricating device for thrust bearing as claimed in claim 3, wherein, The outer wall of the collar (4) is provided with an annular oil groove (401), the oil groove (401) is connected to the second oil inlet (602), and an oil guide hole (402) is provided at the root of the oil groove (401) and extends through the collar (4) along the axial direction. The internal cavity of the oil injection pipe (5) is connected to the internal cavity of the oil guide hole (402).

6. A novel lubricating device for thrust bearing as claimed in claim 5, wherein, A side plate (3) is installed on the outer wall of the collar (4), and the side plate (3) can seal the open end of the oil tank (401).

7. A novel lubricating device for thrust bearing as claimed in claim 1, wherein, The number of the fuel injection pipes (5) is multiple and they are evenly distributed around the center of the thrust shaft (2).

8. A novel lubricating device for thrust bearing as claimed in claim 1, wherein, The fuel injection pipe (5) has an open structure at one end for fuel inlet and a closed structure at the other end. The fuel injection pipe (5) is installed at the end of the collar (4) and close to the outer edge. The end of the fuel injection pipe (5) extends radially along the thrust shaft (2) and toward the root of the thrust disc. The fuel injection pipe (5) has multiple fuel injection holes (501) arranged at equal intervals.

9. A novel lubrication device for a thrust bearing according to claim 2, characterized in that, The lower housing (1) has a first oil outlet (101) at the bottom of the first cavity and a second oil outlet (102) at the bottom of the second cavity. The first oil outlet (101) and the second oil outlet (102) are respectively connected to the return oil chamber (104). The bottom of the return oil chamber (104) has a third oil outlet (103) and the third oil outlet (103) is connected to the main oil chamber (105) at the bottom of the lower housing (1). The third oil outlet (103) is located on the bottom wall of the return oil chamber (104) and away from the oil suction pipe (7).

10. A novel lubricating device for thrust bearing as claimed in claim 2, wherein, A cooling device is installed in the main oil chamber (105).

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