JP2011058511A - Lubricating oil supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating oil supply device shortening a time required to raise a temperature of lubricating oil to an appropriate level when resuming lubricating oil supply to a rotating machine after rotating machine replacement. <P>SOLUTION: A lubricating oil supply device 10 supplies lubricating oil to a bearing 5 of a rotating machine 20. The rotating machine 20 is provided with: an oil inflow port 3 to which a lubricating oil is supplied; and an oil discharge port 7 through which the lubricating oil supplied to the bearing 5 is discharged. The device is equipped with: a tank 21 storing the lubricating oil therein; an oil supply unit 23 arranged close to the oil inflow port 3 to supply the lubricating oil from the tank 21 to the oil inflow port 3; an oil supply path 25 forcing the lubricating oil to flow from the tank 21 to the oil supply unit 23; a first oil return path 27a forcing the lubricating oil to flow from the oil discharge port 7 to the tank 21;and a second oil return path 27b forcing the lubricating oil to flow from the oil supply unit 23 to the tank 21 so as to avoid the rotating machine 20. The oil supply unit 23 can be switched between an oil supply state in which the lubricating oil from the tank 21 is forced to flow to the oil inflow port 3, and a bypass state in which the lubricating oil from the tank 21 is forced to flow to the second oil return path 27b without supply to the oil inflow port 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lubricating oil supply device that supplies lubricating oil to a bearing of a rotating machine to be tested.

  The rotating machine has a rotating body that rotates, and rotates the rotating body on a trial basis in order to check the state of rotation. At this time, a lubricating oil supply device that supplies lubricating oil to a bearing that supports the rotating body is provided. In the inspection, for example, when the rotating body is rotating, vibration generated by the rotation is measured, and unbalanced data of the rotating body is obtained from the measurement result (for example, Patent Document 1 below).

FIG. 1 shows a conventional lubricating oil supply apparatus. The lubricating oil supply device includes a tank 51, a pump 52, an oil supply path 53, an oil supply unit 54, an oil return path 55, a heater 56, and the like.
Lubricating oil is accumulated in the tank 51. In addition, the pump 52 sends the lubricating oil in the tank 51 to the oil supply path 53 (oil supply pipe). The oil supply path 53 allows the lubricating oil from the tank 51 to flow to the oil supply unit 54. The oil supply unit 54 supplies the lubricating oil from the oil supply path 53 to the oil inlet 58 a of the rotary machine 58. The oil return path 55 (oil return pipe) returns the lubricating oil discharged from the oil discharge port 58b of the rotary machine 58 to the tank. The heater 56 heats the lubricating oil in the tank 51. The pump 57 sends the lubricating oil in the oil return path 55 to the tank 51.

  The oil supply unit 54 is moved up and down by a lifting mechanism (not shown), and is connected to the oil inlet 58a of the rotary machine 58 at the lowered position shown in FIG. The oil supply unit 54 is lowered from the raised position shown in FIG. 1 to the lowered position shown in FIG. 2, and is pressed against the surface forming the oil inlet 58a. As a result, as shown in FIG. 2, the movable portion 54a moves up against the spring 54b, whereby the oil supply passage 54c opens, and the lubricating oil flows from the oil supply passage 54c to the oil inlet 58a.

  When supplying lubricating oil to the rotary machine 58 through the oil supply unit 54, the oil supply unit 54 is in the lowered position, and in FIG. 1, the supply valve 59 and the return valve 61 are opened and the bypass valve 63 is closed. The lubricating oil flows and circulates in the order of the tank 51, the oil supply path 53, the oil supply unit 54, the rotating machine 58, the oil return path 55, and the tank 51.

  On the other hand, when the rotating machine 58 to be inspected is replaced, the oil supply unit 54 is set to the above-described raised position, the supply valve 59 and the return valve 61 are closed, and the bypass valve 63 is opened. The bypass path 64 and the tank 51 flow in order and circulate.

JP 2002-039904 A

  However, when the rotating machine 58 is replaced and the lubricating oil is supplied again to the rotating machine 58, it takes time until the temperature of the lubricating oil rises to an appropriate temperature. If the supply valve 59 and the return valve 61 are closed and the bypass valve 63 is opened in order to replace the rotary machine 58, the oil supply path 53 from the supply source valve 59 to the oil supply unit 54, and the oil outlet 58 b of the rotary machine 58. The lubricating oil remains in the return path 55 portion from the connection position to the return valve 61. The remaining lubricating oil is cooled while the rotary machine 58 is replaced. Moreover, since the supply source valve 59, the return valve 61, and the bypass valve 63 are provided close to the tank 51, the lubricating oil remains in the oil supply path 53 and the return path 55 as described above over a wide range. . Therefore, when the supply of the lubricating oil to the rotating machine 58 is restarted after the replacement of the rotating machine 58, it takes time until the temperature of the lubricating oil rises to an appropriate temperature. In particular, when the supply of the lubricating oil is resumed, the low-temperature lubricating oil remaining in the portion of the oil supply path 53 from the supply source valve 59 to the oil supply unit 54 flows into the rotary machine 58, so that the temperature of the lubricating oil rises to an appropriate temperature. It takes time to do.

  Accordingly, an object of the present invention is to provide a lubricating oil supply device that can reduce the time required for the temperature of the lubricating oil to rise to an appropriate temperature when the lubricating oil supply to the rotating machine is restarted after the rotating machine is replaced. It is to provide.

In order to achieve the above object, according to the present invention, there is provided a lubricating oil supply device for supplying lubricating oil to a bearing of a rotary machine,
The rotating machine is provided with an oil inlet to which lubricating oil is supplied and an oil outlet from which the lubricating oil supplied to the bearing is discharged,
A tank in which lubricant is accumulated;
An oil supply unit disposed in proximity to the oil inlet and supplying lubricating oil from a tank to the oil inlet;
An oil supply path for flowing lubricating oil from the tank to the oil supply unit;
A first oil return path for flowing lubricating oil from the oil outlet to the tank;
A second oil return path for flowing lubricating oil from the oil supply unit to the tank so as to avoid the rotating machine,
The oil supply unit is in an oil supply state in which lubricating oil from a tank flows to the oil inlet, and in a bypass state in which lubricating oil from the tank flows to the second oil return path without being supplied to the oil inlet. Switchable,
When the oil supply unit is in the bypass state, the lubricating oil is circulated in the order of a tank, an oil supply path, an oil supply unit, and a second oil return path. Provided.

According to a preferred embodiment of the present invention, the refueling unit comprises:
An oil supply unit connected to the oil inlet and supplying lubricating oil from the tank to the oil inlet;
A moving mechanism for moving the oil supply section between a position connected to the oil inlet and a position spaced from the oil inlet;

Further, according to a preferred embodiment of the present invention, the oil supply unit has a three-way valve, and is switched between the oil supply state and the bypass state by the three-way valve,
The three-way valve is installed in a movable part that is moved by the moving mechanism together with the oil supply part.

  According to a preferred embodiment of the present invention, there is provided a heating device that heats the circulating lubricating oil when the oil supply unit is in the bypass state.

Preferably, the oil supply portion of the oil supply unit is provided with an oil outlet forming surface and a hydraulic pressure use seal, and an oil outlet from which the lubricating oil from the tank flows is formed on the oil outlet formation surface. Is located between the oil inlet forming surface on which the oil inlet is formed and the oil outlet forming surface,
This hydraulic utilization seal is attached to the oil outlet forming surface so as to surround a fluid passage region from the oil outlet to the oil inlet,
Furthermore, the hydraulic pressure utilization seal is located at an inner tip that is in contact with the oil inlet forming surface and surrounds the oil inlet, and away from the inner tip in a direction from the center of the oil inlet to the outer peripheral edge of the oil inlet. An outer portion surrounding the passage region, and an enlarged portion extending from the inner tip to the outer portion and surrounding the fluid passage region,
The enlarged portion is pressed against the oil inflow port forming surface by the hydraulic pressure in the fluid passage region, so that the fluid passage region is sealed from the outside.

  According to the present invention described above, when the oil supply unit is in the bypass state, the lubricating oil circulates in the order of the tank, the oil supply path, the oil supply unit adjacent to the rotating machine, and the oil return path, so that the amount of the lubricating oil that does not circulate Is greatly reduced. Therefore, when the supply of lubricating oil to the rotating machine is restarted after the replacement of the rotating machine, the time for the lubricating oil cooled without circulating to flow into the rotating machine can be greatly shortened. Other effects of the embodiment of the present invention will be clarified in the following description.

The structural example of the conventional lubricating oil supply apparatus is shown. The state which the oil supply unit of FIG. 1 supplies is shown. The structure of the lubricating oil supply apparatus by embodiment of this invention is shown. (A) is the elements on larger scale in the vicinity of the hydraulic pressure utilization seal in FIG. 3, (B) is a BB arrow view of (A). FIG. 5 shows a state in which lubricating oil flows in the oil passage region in the configuration of FIG. Another structural example of a hydraulic-utilizing seal is shown. Another structural example of a hydraulic-utilizing seal is shown. Another structural example of a hydraulic-utilizing seal is shown.

  The best mode for carrying out the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

[Lubricating oil supply device]
FIG. 3 is a configuration diagram of the lubricating oil supply apparatus 10 according to the embodiment of the present invention. The lubricating oil supply device 10 is a device that supplies lubricating oil to the bearing 5 of the rotating machine 20 to be tested.

  The rotary machine 20 is provided with an oil inlet 3 to which lubricating oil is supplied and an oil outlet 7 from which the lubricating oil supplied to the bearing 5 is discharged. In the example of FIG. 3, the rotary machine 20 is a supercharger. The supercharger 20 is a device that supplies compressed air to an engine by using exhaust gas energy of an engine mounted on a vehicle or a ship. The turbocharger 20 includes a turbine blade 9 that is rotationally driven by exhaust gas from the engine, a compressor blade 11 that supplies compressed air to the engine by rotating integrally with the turbine blade 9, and the turbine blade 9 coupled to one end. And a rotating shaft 13 to which the compressor blade 11 is coupled. The turbocharger 20 includes a turbine housing 15 that houses the turbine blades 9 therein, a compressor housing (not shown) that houses the compressor blades 11 therein, and a bearing 5 that supports the rotary shaft 13 incorporated therein. Bearing housing 17. The turbine blade 9, the compressor blade 11, and the rotating shaft 13 constitute a rotating body of the vibration measurement target rotating machine 20. The turbine housing 15, the compressor housing and the bearing housing 17 are stationary sides.

  The lubricating oil supply apparatus 10 includes a tank 21, an oil supply unit 23, an oil supply path 25, first and second oil return paths 27a and 27b, a heating device 28, and the like.

  Lubricating oil is accumulated in the tank 21. The tank 21 is provided with a pump 21a. The pump 21 a sends the lubricating oil in the tank 21 to the oil supply path 25.

  The oil supply unit 23 is disposed in the vicinity of the oil inlet 3, and supplies the lubricating oil sent from the tank 21 through the oil supply path 25 to the oil inlet 3. The oil supply unit 23 can be switched between an oil supply state and a bypass state. In the oil supply state, the lubricant oil from the tank 21 flows to the oil inlet 3, and in the bypass state, the lubricant oil from the tank 21 is supplied to the oil supply port 3. Without being supplied to the inflow port 3, it flows to the second oil return path 27 b.

  The oil supply path 25 is a pipe connecting the tank 21 and the oil supply unit 23, and allows the lubricating oil to flow from the tank 21 to the oil supply unit 23. The pipe 25 may be slack and deformable so that the movement of the fuel supply unit 23 can be followed when the fuel supply unit 23 moves as described later.

The first oil return path 27 a is a pipe that connects the oil discharge port 7 of the rotary machine 20 and the tank 21, and allows lubricating oil to flow from the oil discharge port 7 to the tank 21. The second oil return path 27 b is a pipe that connects the oil supply unit 23 (three-way valve 23 c) and the tank 21, and is a pipe that flows lubricating oil from the oil supply unit 23 to the tank 21 so as to avoid the rotating machine 20. . In the example of FIG. 3, the first and second oil return paths 27 a merge at a position close to the oil discharge port 7 and share a path / pipe from the position to the tank 21.
Note that a pump 27c for sending the lubricating oil in the oil return paths 27a and 27b to the tank 21 may be provided in the oil return path 27a or 27b (in FIG. 3, a shared portion of the paths 27a and 27b).

  When the oil supply unit 23 is in the oil supply state or the bypass state, the heating device 28 heats the circulating lubricating oil to bring the temperature of the lubricating oil into a desired range. In the example of FIG. 3, the heating device 28 is provided in the tank 21, but may be provided in another location.

  According to the present embodiment, when the oil supply unit 23 is in the bypass state, the lubricating oil does not pass through the rotary machine 20 and goes in the order of the tank 21, the oil supply path 25, the oil supply unit 23, and the second oil return path 27b. When the oil supply unit 23 is in the oil supply state, the lubricating oil circulates in the order of the tank 21, the oil supply path 25, the oil supply unit 23, the rotary machine 20, and the first oil return path 27a. ing.

  The oil supply unit 23 will be described in more detail.

The oil supply unit 23 includes an oil supply part 23a, a moving mechanism 23b, and a three-way valve 23c.
The oil supply unit 23 a is connected to the oil inlet 3 of the rotary machine 20 and supplies oil from the tank 21 to the oil inlet 3. A temperature sensor (thermocouple) that detects the temperature of the lubricating oil may be provided in the oil supply unit 23a, and thereby confirming that the temperature detected by the temperature sensor is within a desired range after the rotating machine 20 is replaced. it can.
The movement mechanism 23b moves the oil supply part 23a between the connection position and the non-connection position. The moving machine moves the oil supply portion 23 a to the connection position, so that the oil supply portion 23 a is connected to the oil inlet 3. On the other hand, the moving mechanism 23b moves the oil supply portion 23a to the non-connection position, so that the oil supply portion 23a is separated from the oil inlet 3. The moving mechanism 23b may be, for example, a hydraulic or pneumatic cylinder device that raises and lowers the oil supply portion 23a between the connection position and the non-connection position, but the oil supply portion 23a is between the connection position and the non-connection position. Any other suitable mechanism may be used as long as it can be moved by.
The oil supply unit 23 is switched between the oil supply state and the bypass state by the three-way valve 23c. That is, the three-way valve is switched between the oil supply state and the bypass state. In the oil supply state, the lubricating oil from the tank 21 flows to the oil supply portion 23a and the oil inlet 3, and in the bypass state, Lubricating oil from the tank 21 is supplied to the second oil return path 27 b without being supplied to the oil inlet 3. The switching may be performed by an operator operating a predetermined operation unit 23d. For example, when the operator operates the operation unit 23d, a control signal for switching the three-way valve 23c to the oil supply state or the bypass state is output to the three-way valve 23c, and according to the control signal, the three-way valve 23c Is switched to the oil supply state or the bypass state. The three-way valve 23c is installed in the movable part 23e moved by the moving mechanism 23b together with the oil supply part 23a.

  According to the lubricating oil supply apparatus 10 described above, when the oil supply unit 23 is in the bypass state, the lubricating oil is supplied to the tank 21, the oil supply path 25, the oil supply unit 23 adjacent to the rotary machine 20, and the second oil return path 27b. Since it circulates in order, the amount of lubricating oil that does not circulate can be greatly reduced or almost eliminated. For example, the amount of lubricating oil that does not circulate can be reduced to the amount of lubricating oil remaining in the oil supply portion 23a. Therefore, when the supply of the lubricating oil to the rotating machine 20 is resumed after the replacement of the rotating machine 20, the time for the lubricating oil cooled without circulating to flow into the rotating machine 20 can be greatly shortened. As a result, when the supply of the lubricating oil to the rotating machine 20 is resumed, the lubricating oil having an appropriate temperature can be promptly introduced into the rotating machine 20.

[Hydraulic seal]
The oil supply unit 23 a has a hydraulic pressure utilization seal 29. 4A is a partially enlarged view of the vicinity of the hydraulic pressure use seal 29 in FIG. 3, and FIG. 4B is a view taken along the line BB in FIG. 4A.

  The oil pressure use seal 29 seals the connecting portion between the oil outlet 29a through which the lubricating oil flows out and the oil inlet 3 through which the lubricating oil from the oil outlet 29a flows, using the pressure (hydraulic pressure) of the lubricating oil. To do. The hydraulic pressure utilization seal 29 is attached to the oil outlet forming surface 29b. The oil outlet formation surface 29b is provided on the oil supply portion 23a, and is a surface on which an oil outlet 29a from which the lubricating oil from the tank 21 flows is formed. For example, the oil supply portion 23a may have a cylindrical shape through which lubricating oil flows, and a flange 24 may be provided at the tip of the cylinder, and the tip surface of the flange 24 may be an oil outlet forming surface 29b. In a state where the oil supply portion 23a is moved to the connection position by the moving mechanism 23b, the tip 29c of the hydraulic pressure utilization seal 29 contacts the oil inlet forming surface 33 on which the oil inlet 3 is formed, and the oil outlet 29a The oil passage area 31 from the oil inlet 3 to the oil inlet 3 is surrounded.

  The hydraulic pressure utilization seal 29 has an inner tip 29c, an outer portion 29d, and an enlarged portion 29e. The inner front end 29 c is in contact with the oil inlet forming surface 33 and surrounds the oil inlet 3. The outer portion 29d is located away from the inner tip 29c in the direction from the center of the oil inlet 3 toward the outer peripheral edge of the oil inlet 3, and surrounds the oil passage region 31. The enlarged portion 29e extends from the inner tip 29c to the outer portion 29d and surrounds the oil passage region 31.

  With the above-described configuration, when the oil supply portion 23a is in the connection position, the enlarged portion 29e is pressed against the oil inlet forming surface 33 by the oil pressure in the oil passage region 31, so that the sealing of the oil passage region 31 with respect to the outside is maintained. The

  The hydraulic utilization seal 29 will be described in more detail.

  In this example, the inner tip 29c has an annular shape as viewed from the direction of the central axis C of the hydraulic seal 29, and each of the outer portion 29d and the enlarged portion 29e has a cross-sectional shape by a plane orthogonal to the central axis C ( Hereinafter, the cross-sectional shape is circular (see FIG. 4B). In this example, the inner tip 29c is a flat contact surface, and the outer portion 29d has a cylindrical shape. In this example, as shown in FIG. 4A, the enlarged portion 29e has a cross-sectional shape (hereinafter referred to as a vertical cross-sectional shape) by a plane including the central axis C in a direction inclined outward from the central axis C. Thus, it extends linearly from the inner tip 29c to the outer portion 29d in the direction toward the oil outlet 29a.

FIG. 4A shows a state in which the lubricating oil is not flowing through the oil passage region 31 inside the hydraulic pressure utilization seal 29. On the other hand, FIG. 5 shows a state in which lubricating oil is allowed to flow through the oil passage region 31 in the configuration of FIG.
As shown in FIG. 5, when the lubricating oil passes through the oil passage region 31, the pressure of the lubricating oil (for example, 300 to 500 kPa) acts on the hydraulic pressure utilization seal 29. As a result, the enlarged portion 29e is pressed against the oil inflow port forming surface 33 by the oil pressure in the oil passage region 31, and the sealing of the oil passage region 31 with respect to the outside is maintained. In the present embodiment, as shown in FIG. 5, the hydraulic pressure utilization seal 29 is elastically deformed by the hydraulic pressure (for example, 300 to 500 kPa) in the oil passage region 31, and thereby the enlarged portion 29 e is pressed against the oil inlet forming surface 33. It is done. The contact area between the hydraulic pressure utilization seal 29 and the oil inlet forming surface 33 in FIG. 5 is larger than that in the state of FIG.

Since the enlarged portion 29e is pressed against the oil inflow port forming surface 33 by the oil pressure in the oil passage region 31 by the oil pressure use seal 29, the seal (seal) of the oil passage region 31 with respect to the outside is maintained. By simply applying a micro force for contacting the oil inflow port forming surface 33 to the oil inflow port forming surface 33 from the oil pressure utilization seal 29, sealing is performed by hydraulic pressure. Therefore, the connection portion between the oil outlet 29 a and the oil inlet 3 can be sealed with almost no external force acting on the oil inlet forming surface 33.
Further, the enlarged portion 29 e can be pressed against the oil inlet forming surface 33 so as to be in close contact with the oil inlet forming surface 33 by elastically deforming the hydraulic pressure utilization seal 29 by the oil pressure in the oil passage region 31. Thereby, the connection location of the oil outlet 29a and the oil inlet 3 can be sealed more reliably.
Furthermore, since the longitudinal cross-sectional shape of the enlarged portion 29e extends from the oil inlet forming surface 33 to the outer side portion 29d in a direction inclined from the central axis C and toward the oil inlet 3 side, the hydraulic pressure utilization seal When the oil pressure acts on 29, the oil pressure utilization seal 29 is elastically deformed, and the contact area between the oil pressure utilization seal 29 (that is, the inner tip 29c and the enlarged portion 29e) and the oil inflow port forming surface 33 increases. Therefore, the sealing is performed more reliably.

[Rotating machinery testing]
The test of the rotating machine 20 (supercharger in this example) is an unbalance test of the rotating body in this example, and is performed as follows.
The vibration measurement turbine housing 15 of the supercharger 20 from which the compressor housing (not shown) is removed is attached to the vibration measurement support 32 with bolts 35 or the like. Thereafter, compressed gas having the same pressure as the exhaust gas of the engine is supplied to the turbine blade 9 through a flow path (not shown) formed in the turbine housing 15, whereby the turbine blade 9, the compressor blade 11 and the rotation are supplied. The rotating body composed of the shaft 13 is driven to rotate. When the rotating body reaches a predetermined rotational speed, the rotation angle detector 39 measures the rotation angle of the rotating body while measuring the vibration (ie, acceleration) of the rotating body with the acceleration pickup 37 attached to the bearing housing 17. . Thereby, for example, the calculator 41 measures how much vibration (acceleration) is generated at which rotation angle at a predetermined rotation speed. The unbalance amount is obtained based on this measurement data.

  At the time of the above-described vibration measurement, the oil supply portion 23a is positioned at the connection position by the moving mechanism 23b, so that the inner tip 29c of the hydraulic pressure utilization seal 29 is brought into contact with the oil inlet forming surface 33. In this example, the oil inlet forming surface 33 is an outer surface of the bearing housing 17. The lubricating oil flows into the oil inlet 3 from the oil outlet 29a of the oil supply section 23a at a pressure of, for example, about 300 to 500 kPa. The lubricating oil that has flowed into the oil inlet 3 is supplied to the bearing 5 through a lubricating oil passage 42 formed inside the bearing housing 17. The lubricating oil supplied to the bearing 5 is then discharged from the oil discharge port 7 to the first oil return path 27a. Accordingly, the lubricating oil is circulated by the pumps 21b and 27a in the order of the tank 21, the oil supply part 23a of the oil supply unit 23, the rotary machine 20, and the first oil return path 27a.

  In addition, during the vibration measurement described above, when the oil supply portion 23a is connected to the oil inlet 3, the contact pressure that causes the inner tip 29c of the hydraulic seal 29 to act on the oil inlet forming surface 33 can be generated by the moving mechanism 23b. It is preferable to make it as small as possible. This is because the contact pressure (external force) acting on the oil inlet forming surface 33 adversely affects vibration measurement and becomes an obstacle to highly accurate vibration measurement. Therefore, the oil outlet 29a and the oil inlet 3 are connected using a hydraulic pressure seal 29 so that the above-described contact pressure becomes a predetermined minute value. For example, a pressure sensor that detects the contact pressure and a control unit that controls the movement of the moving mechanism 23b based on the contact pressure detected by the pressure sensor so that the contact pressure becomes a predetermined minute value are provided. It's okay. In this case, the pressure sensor may be, for example, a piezoelectric element incorporated in the movable portion 23e so that the contact pressure (that is, the reaction force) acts.

  Note that the lubricating oil supplied to the bearing 5 passes through an oil drain passage (not shown) formed in the bearing housing 17 and flows from the oil outlet 7 provided on the outer surface of the bearing housing 17 to the pipe 27a. Flowing. For example, a seal 47 shown in FIG. 3 is provided at a connection portion between the oil discharge port 7 and the pipe 27a. Since the pressure of the lubricating oil at the oil discharge port 7 is small, the oil does not leak to the outside only by bringing the seal 47 into contact with the outer surface of the bearing housing 17 with a small force. Therefore, the oil pressure use seal 29 does not have to be used for the connection between the oil discharge port 7 and the pipe 27a.

  The present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

[Other Embodiments]
For example, the shape of the hydraulic pressure utilization seal 29 may be the shape shown in FIG. 6 in addition to the shape shown in FIG. The hydraulic pressure utilization seal 29 of FIG. 6 is the same as the hydraulic pressure utilization seal 29 of FIG. 4 except for the points described below.

In FIG. 4A, in the connected state where the oil outlet 29a and the oil inlet 3 are also connected using the oil pressure use seal 29, when the oil pressure is not applied to the oil pressure use seal 29, the inside of the oil pressure use seal 29 is shown. The tip 29c is in surface contact with the oil inlet forming surface 33.
In the case of FIG. 6, when no hydraulic pressure is applied to the hydraulic pressure utilization seal 29 in the connected state, as shown in FIG. 6A, the inner tip 29 c of the hydraulic pressure utilization seal 29 is the oil inlet forming surface 33. Is touching by a line (drawing a circle). In FIG. 6, as in the case of FIG. 4B, the inner tip 29c has an annular shape when viewed from the central axis C direction of the hydraulic seal 29, and each of the outer portion 29d and the enlarged portion 29e is The cross-sectional shape is annular. In the case of FIG. 6, when the oil pressure is applied, the oil pressure utilization seal 29 is elastically deformed as shown in FIG. 6B, so that the enlarged portion 29 e is pressed against the oil inlet forming surface 33 by the oil pressure.

Moreover, the shape shown in FIG. The hydraulic utilization seal 29 in FIG. 7 is the same as the hydraulic utilization seal 29 in FIG. 4 except for the points described below.
In FIG. 4A, the vertical cross-sectional shape of the enlarged portion 29e extends linearly from the inner tip 29c to the outer portion 29d in a state where an external force including hydraulic pressure is not acting on the hydraulic pressure utilization seal 29.
In the case of FIG. 7, in the state where the external force including the hydraulic pressure is not applied to the hydraulic pressure utilization seal 29, the longitudinal section shape of the enlarged portion 29e is from the inner tip 29c to the outer portion 29d as shown in FIG. It extends in a curved line. FIG. 7B shows a state in which hydraulic pressure is applied to the hydraulic pressure utilization seal 29 in the configuration of FIG. In FIG. 7, as in the case of FIG. 4B, the inner tip 29 c has an annular shape when viewed from the central axis C direction of the hydraulic seal 29, and each of the outer portion 29 d and the enlarged portion 29 e is The cross-sectional shape is annular.

Further, the shape of the hydraulic pressure utilization seal 29 may be the shape shown in FIG. The hydraulic pressure utilization seal 29 of FIG. 8 is the same as the hydraulic pressure utilization seal 29 of FIG. 4 except for the points described below.
In the case of FIG. 8, the vertical sectional shape of the enlarged portion 29 e is perpendicular to the central axis C as shown in FIG. Furthermore, it extends from the inner tip 29c to the outer portion 29d. In FIG. 8A, the entire enlarged portion 29 e is in contact with the oil inflow port forming surface 33. In the case of FIG. 8, preferably, the outer portion 29d is not elastically deformed, or is formed of a material (for example, metal) that is difficult to elastically deform and has high rigidity, and the inner tip 29c and the enlarged portion 29e are easily elastically deformed. It is made of a material (for example, rubber). With this configuration, the entire enlarged portion 29e is pressed against the oil inflow port forming surface 33 by the hydraulic pressure, and comes into contact with the oil inflow port forming surface 33 (state shown in FIG. 8B). In the case of FIG. 8 as well, the enlarged portion 29e is elastically deformed by hydraulic pressure, but the amount of elastic deformation is smaller than that in the case of FIG. Further, in the case of FIG. 8, even if hydraulic pressure acts on the hydraulic pressure utilization seal 29, the contact area between the hydraulic pressure utilization seal 29 and the oil inflow port forming surface 33 is a diagram where hydraulic pressure does not act on the hydraulic pressure utilization seal 29. It may be the same as the state of 8 (A). The inner tip 29c and the enlarged portion 29e are integrally formed, and the enlarged portion 29e is water-tightly coupled to the outer portion 29d by an adhesive or the like. In FIG. 8, as in the case of FIG. 4B, the inner tip 29 c has an annular shape when viewed from the central axis C direction of the hydraulic seal 29, and each of the outer portion 29 d and the enlarged portion 29 e is The cross-sectional shape is annular.

  According to the present invention, the rotary machine 20 described above may be a rotary machine other than a supercharger (for example, a turbo compressor or a gas turbine).

3 Oil inlet, 5 Bearing, 7 Oil outlet, 9 Turbine blade,
10 Lubricating oil supply device, 11 compressor blade, 13 rotating shaft,
15 turbine housing, 17 bearing housing, 20 rotating machine (supercharger),
21 tank, 21a heater, 21b pump, 23 oil supply unit,
23a Oil supply part, 23b Movement mechanism, 23c 3 way valve, 23d Operation part,
23e movable part, 25 oil supply path, 27a first oil return path,
27b Second oil return path, 29 oil pressure utilization seal, 29a oil outlet,
29b oil outlet forming surface, 29c inner tip, 29d outer part,
29e enlarged portion, 31 oil passage area, 32 support, 33 oil inlet forming surface,
35 volts, 37 acceleration pickup, 39 rotation angle detector, 41 calculator

Claims (5)

A lubricating oil supply device that supplies lubricating oil to a bearing of a rotating machine,
The rotating machine is provided with an oil inlet to which lubricating oil is supplied and an oil outlet from which the lubricating oil supplied to the bearing is discharged,
A tank in which lubricant is accumulated;
An oil supply unit disposed in proximity to the oil inlet and supplying lubricating oil from a tank to the oil inlet;
An oil supply path for flowing lubricating oil from the tank to the oil supply unit;
A first oil return path for flowing lubricating oil from the oil outlet to the tank;
A second oil return path for flowing lubricating oil from the oil supply unit to the tank so as to avoid the rotating machine,
The oil supply unit is in an oil supply state in which lubricating oil from a tank flows to the oil inlet, and in a bypass state in which lubricating oil from the tank flows to the second oil return path without being supplied to the oil inlet. Switchable,
When the oil supply unit is in the bypass state, the lubricant is circulated in the order of a tank, an oil supply path, an oil supply unit, and a second oil return path. The refueling unit is
An oil supply unit connected to the oil inlet and supplying lubricating oil from the tank to the oil inlet;
The lubricating oil supply apparatus according to claim 1, further comprising: a moving mechanism that moves the oil supply unit between a position connected to the oil inlet and a position separated from the oil inlet. The oil supply unit has a three-way valve, and is switched between the oil supply state and the bypass state by the three-way valve,
The lubricating oil supply apparatus according to claim 2, wherein the three-way valve is installed in a movable part that is moved by the moving mechanism together with the oil supply part.   4. The lubricating oil supply device according to claim 1, further comprising a heating device that heats the circulating lubricating oil when the oil supply unit is in the bypass state. 5. The oil supply portion of the oil supply unit is provided with an oil outlet forming surface and a hydraulic pressure use seal, and the oil outlet forming surface is formed with an oil outlet from which the lubricating oil flows from the tank. Located between the oil inlet forming surface on which the oil inlet is formed and the oil outlet forming surface,
This hydraulic utilization seal is attached to the oil outlet forming surface so as to surround a fluid passage region from the oil outlet to the oil inlet,
Furthermore, the hydraulic pressure utilization seal is located at an inner tip that is in contact with the oil inlet forming surface and surrounds the oil inlet, and away from the inner tip in a direction from the center of the oil inlet to the outer peripheral edge of the oil inlet. An outer portion surrounding the passage region, and an enlarged portion extending from the inner tip to the outer portion and surrounding the fluid passage region,
The sealing of the fluid passage region with respect to the outside is maintained by pressing the enlarged portion against the oil inlet forming surface by the hydraulic pressure in the fluid passage region. The lubricating oil supply device described in 1.

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