JP2016133199A - Lubricating oil supply system of pump facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricating oil supply system of a pump facility, that has a simple configuration using other energy than electricity as a power source and can supply lubricating oil to lubricating oil supply targets including bearings of the pump facility in the time of emergency.SOLUTION: A lubricating oil supply system 50 of a pump facility comprises: a rotary pump 58 operated with rotation of a transmission shaft that is connected between a rotating shaft 21 of a driving machine 2 and a rotating shaft 11 of a pump body 1; an oil catch line 59 in which the lubricating oil sucked up from an oil tank 51 flows towards the rotary pump 58; a second lubrication-oil recovery line 60 in which the lubricating oil recovered from the rotary pump 58 to the oil tank 51 flows; a solenoid valve 61 opening and closing the second lubrication-oil recovery line 60; and a second lubricating-oil supply line 62 connecting an upstream side of the solenoid valve 61 in the second lubrication-oil recovery line 60 and a first lubricating-oil supply line 52.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lubricating oil supply system for pump equipment, and more particularly to a lubricating oil supply system for supplying lubricating oil to a lubricating oil supply target including a bearing of the pump equipment.

  Bearings on the pump body provided in the pump equipment, power transmission mechanisms such as speed reducers and speed increasers that are ancillary equipment of the pump equipment, and bearings of the drive machine that drives the pump body are burned out or the incidental equipment is damaged. The lubricating oil is supplied from a lubricating oil supply pump.

  For example, when a power failure due to a power failure occurs, the drive loses the power source and the generation of the driving force stops. However, the pump main body and the incidental equipment in the pump equipment require time to stop because inertial force due to rotation is working. Until the pump main body and the auxiliary equipment are stopped, an emergency lubricating oil supply pump supplies the lubricating oil so that the bearing of the pump main body, the power transmission mechanism as the auxiliary equipment, and the bearing of the driving machine are not damaged.

  To drive an emergency lubricating oil supply pump, electric energy is generally required as a power source. Therefore, an emergency power supply can be secured separately from the normal power supply, or an external power supply such as an uninterruptible power supply can be installed. Sometimes installed.

  On the other hand, for example, in Patent Document 1, when an abnormality occurs in power supply to an oil pump that supplies lubricating oil, a drive unit such as a steam turbine other than electricity, a water turbine, or a windmill is used as a power source for the oil pump. The technique used is disclosed.

JP 2005-105867 A

  However, securing an emergency power source as described above as a power source for the drive unit of the emergency lubricant supply pump and installing an external power source such as an uninterruptible power supply have established infrastructures overseas. It may be difficult in areas where there is no. In such a case, the lubricating oil supply pump stops during an emergency such as a power failure, and there is a risk that the bearing from which the lubricating oil supply is cut off will burn out or damage incidental equipment.

  Further, the technique described in Patent Document 1 requires special incidental equipment such as a steam turbine, a water turbine, and a windmill, and a pressure and flow rate adjusting mechanism as a power source of the oil pump. For this reason, high initial cost and complicated control are required.

  The problem to be solved by the present invention is a lubricating oil supply system for a pump facility that can supply lubricating oil to a lubricating oil supply target including a bearing of the pump facility in an emergency with a simple configuration using energy other than electricity as a power source. Is to provide.

  In order to solve the above problems, a lubricating oil supply system for pump equipment according to the present invention is supplied from the oil tank toward a lubricating oil supply target including an oil tank for storing lubricating oil and a bearing for the pump equipment. A first lubricating oil supply line through which the lubricating oil circulates, a lubricating oil supply pump that sends the lubricating oil through the first lubricating oil supply line, and a lubricating oil that is recovered from the lubricating oil supply target to the oil tank circulates. A first lubricating oil recovery line; a rotary pump that operates by rotation of a transmission shaft connected between a rotary shaft of a drive unit that drives a pump main body provided in the pump facility and a rotary shaft of the pump main body; An oil intake line through which lubricating oil sucked up from the oil tank flows toward the rotary pump, and lubricating oil recovered from the rotary pump to the oil tank flows through A second lubricating oil recovery line; an electromagnetic valve provided in the middle of the second lubricating oil recovery line; for opening and closing the second lubricating oil recovery line; an upstream side of the electromagnetic valve in the second lubricating oil recovery line; A second lubricating oil supply line connecting the first lubricating oil supply line.

  According to the present invention, there is provided a lubricating oil supply system for a pump facility that can supply lubricating oil to a lubricating oil supply target including a bearing of the pump facility in an emergency with a simple configuration using energy other than electricity as a power source. Can do.

It is a figure showing typically the whole lubrication oil supply system of pump equipment concerning one embodiment of the present invention. It is a figure which shows typically the whole structure of the lubricating oil supply system of the pump installation which concerns on a comparative example.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
Note that, in the drawings shown below, the same members or corresponding members are denoted by the same reference numerals, and redundant description is omitted as appropriate. In addition, the size and shape of the members are schematically shown in a deformed or exaggerated manner for convenience of explanation.

FIG. 1 is a diagram schematically showing an overall configuration of a lubricating oil supply system 50 for pump equipment according to an embodiment of the present invention.
As shown in FIG. 1, a lubricating oil supply system (hereinafter simply referred to as “lubricating oil supply system”) 50 for pump equipment according to the present embodiment is applied to the pump equipment 10.

  The pump facility 10 includes a pump main body 1 used for various applications such as liquid supply, discharge, and transportation, a drive unit 2 as a power source for driving the pump main unit 1, and a driving force of the drive unit 2 as a pump main unit 1. And a power transmission mechanism 3 for transmitting to the vehicle.

  The pump main body 1 includes a rotary shaft 11 and bearings 12 and 13 that rotatably support the rotary shaft 11 of the pump main body 1. For the convenience of explanation, only the central axis of the rotation axis 11 is displayed in FIG. The pump body 1 is a multistage pump having a rotating member such as an impeller, but is not limited to this, and various pumps can be used.

  In the present embodiment, the drive machine 2 is a motor that operates using electricity as a power source. The drive machine 2 includes a rotary shaft 21 and bearings 22 and 23 that rotatably support the rotary shaft 21 of the drive machine 2. For the convenience of explanation, only the central axis is displayed in FIG.

  The power transmission mechanism 3 is a reduction gear, a speed increaser, or the like, which is an incidental facility of the pump facility 10. The power transmission mechanism 3 includes an input shaft 31 connected to the rotary shaft 21 of the driving machine 2, an output shaft 32 connected to the rotary shaft 11 of the pump body 1, and a gear that transmits the driving force of the input shaft 31 to the output shaft 32. And a mechanism 33. For the convenience of explanation, only the central axis is displayed for the input shaft 31 and the output shaft 32 in FIG. Further, although the gear mechanism 33 is indicated by a two-dot chain line for convenience of explanation in FIG. 1, specifically, a plurality of gears meshing with each other can be used.

The lubricating oil supply system 50 includes an oil tank 51, a first lubricating oil supply line 52, a lubricating oil supply pump 53, a first lubricating oil recovery line 56, and a cooling device 57.
In FIG. 1, a line for supplying the lubricating oil is indicated by a solid line, and a line for recovering the lubricating oil is indicated by a broken line.

  The oil tank 51 is a tank that stores lubricating oil. The first lubricating oil supply line 52 is a liquid passage through which the lubricating oil supplied from the oil tank 51 flows toward the lubricating oil supply target including the bearings 12, 13, 22, and 23 of the pump facility 10.

  The lubricating oil supply pump 53 is a pump that sends out the lubricating oil through the first lubricating oil supply line 52. Here, the lubricating oil supply pump 53 is provided in the oil tank 51. As the lubricating oil supply pump 53, various pumps capable of sending lubricating oil can be used.

  The lubricating oil supply pump 53 includes a main pump 54 that is a mainly used pump and an auxiliary pump 55 that is an auxiliary pump. The main pump 54 is driven by a drive machine 54a such as a motor that operates by supplying power from a power source. Further, the auxiliary pump 55 is driven by a driving machine 55a such as a motor that operates by supplying power from a power source.

  The first lubricating oil recovery line 56 is a liquid path through which the lubricating oil recovered from the lubricating oil supply target to the oil tank 51 flows. The cooling device 57 is provided in the middle of the first lubricating oil supply line 52, and adjusts the temperature of the lubricating oil passing through the first lubricating oil supply line 52.

  In the present embodiment, the lubricant supply target includes the bearings 12 and 13 that support the rotating shaft 11 of the pump body 1, the bearings 22 and 23 that support the rotating shaft 21 of the driving machine 2, and the power transmission mechanism 3. . The lubricant supply target in the power transmission mechanism 3 includes the bearings of the input shaft 31 and the output shaft 32.

  The lubricating oil supply system 50 includes a rotary pump 58, an oil intake line 59, a second lubricating oil recovery line 60, a solenoid valve 61, and a second lubricating oil supply line 62.

  The rotary pump 58 is a pump that operates by rotation of a transmission shaft connected between the rotary shaft 21 of the driving machine 2 and the rotary shaft 11 of the pump body 1. As the rotary pump 58, for example, a positive displacement pump such as a gear pump can be used.

  In the present embodiment, the rotary pump 58 is attached to the end portion of the input shaft 31 of the power transmission mechanism 3 on the side opposite to the driver 2. However, the mounting position of the rotary pump 58 is not limited to this. For example, the rotary pump 58 may be attached to the end of the output shaft 32 of the power transmission mechanism 3 opposite to the pump body 1. The rotary pump 58 may be attached to both the end of the input shaft 31 opposite to the drive unit 2 and the end of the output shaft 32 opposite to the pump body 1. Here, the input shaft 31 and the output shaft 32 constitute a transmission shaft connected between the rotating shaft 21 of the driving machine 2 and the rotating shaft 11 of the pump body 1.

  The oil intake line 59 is a liquid passage through which the lubricating oil sucked up from the oil tank 51 flows toward the rotary pump 58. The second lubricating oil recovery line 60 is a liquid path through which the lubricating oil recovered from the rotary pump 58 to the oil tank 51 flows.

  The electromagnetic valve 61 is provided in the middle of the second lubricating oil recovery line 60 and opens and closes the second lubricating oil recovery line 60. Here, the solenoid valve 61 is a normally closed solenoid valve that opens when energized and closes when de-energized.

  In the present embodiment, the electromagnetic valve 61 has a mechanism that mechanically shuts off the second lubricating oil recovery line 60 when the supply of electric power is stopped. Specifically, when electric power is supplied, the solenoid valve 61 is energized by a coil (not shown) provided in the solenoid valve 61, whereby a spring member (see FIG. It opens by moving a valve body (not shown) in the valve opening direction against the elastic force of the not shown. As a result, the second lubricating oil recovery line 60 communicates. On the other hand, in an emergency such as when the supply of power is stopped, the solenoid valve 61 is closed by the coil member being demagnetized and the elastic force of the spring member urging the valve body in the valve closing direction. Thereby, the 2nd lubricating oil collection line 60 is interrupted | blocked.

  The second lubricating oil supply line 62 is a liquid path that connects the upstream side of the electromagnetic valve 61 in the second lubricating oil recovery line 60 and the first lubricating oil supply line 52. The downstream end of the second lubricating oil supply line 62 is connected to the side near the oil tank 51 in the first lubricating oil supply line 52.

Next, the operation of the lubricating oil supply system 50 configured as described above will be described.
When the pump facility 10 is started, the main pump 54 of the lubricating oil supply pump 53 is driven by a drive unit 54a that is operated by power supply from a power source, and sends the lubricating oil toward the above-described lubricating oil supply target. That is, the lubricating oil passes through the first lubricating oil supply line 52 and is supplied to the bearings 12 and 13 of the pump body 1, the bearings 22 and 23 of the driving machine 2, and the power transmission mechanism 3. At that time, the temperature of the lubricating oil passing through the first lubricating oil supply line 52 is adjusted by passing through the cooling device 57 on the way. The lubricating oil supplied to the lubricating oil supply target is recovered into the oil tank 51 through the first lubricating oil recovery line 56.

  When switching to normal operation after the pump facility 10 is started, the main pump 54 of the lubricating oil supply pump 53 continues to supply the lubricating oil and supply it to the lubricating oil supply target. If it is detected by a pressure sensor (not shown) installed in the first lubricating oil supply line 52 that the hydraulic pressure of the lubricating oil being supplied has dropped below a predetermined value, the lubricating oil supply pump 53 The auxiliary pump 55 is operated to compensate for the shortage of lubricating oil. In this way, when the pump facility 10 is started, the main oil 54 is supplied to the lubricating oil supply target by the main pump 54 of the lubricating oil supply pump 53, and at the normal time after starting, the main pump 54 and the auxiliary pump 55 of the lubricating oil supply pump 53 are supplied. Lubricating oil is supplied to the lubricating oil supply object by 2 units structure.

  During the operation of the pump facility 10, the driving machine 2 is driven, and the driving force of the driving machine 2 is transmitted to the pump body 1 via the power transmission mechanism 3. Here, the input shaft 31 of the power transmission mechanism 3 is rotated by the driving force of the driving machine 2, and the rotation of the input shaft 31 is transmitted to the rotating shaft 11 of the pump body 1 through the gear mechanism 33 and the output shaft 32. At this time, the rotary pump 58 is operated by the rotation of the input shaft 31 constituting the transmission shaft described above.

  When the rotary pump 58 operates, the lubricating oil is sucked up from the oil tank 51 through the oil intake line 59. In normal times, the lubricating oil delivered from the rotary pump 58 is recovered to the oil tank 51 through the electromagnetic valve 61 and the second lubricating oil recovery line 60. The electromagnetic valve 61 is normally excited by being supplied with electric power and continues to be opened. Here, since most of the lubricating oil sucked up by the rotary pump 58 through the oil intake line 59 is recovered to the oil tank 51, the oil pressure and the oil amount of the lubricating oil delivered by the main pump 54 of the lubricating oil supply pump 53 are reduced. Does not have a big impact.

  On the other hand, when the power supply is abnormal due to a power failure or the like (emergency), the entire pump facility 10 stops. That is, the driving machine 2, the main pump 54 of the lubricating oil supply pump 53, and the driving machines 54a and 55a of the auxiliary pump 55 lose the power source and the generation of the driving force stops. Since the lubricating oil supply system 50 shown in FIG. 1 does not have a power source for moving the drives 54a and 55a of the lubricating oil supply pump 53 in an emergency, the lubricating oil supply by the lubricating oil supply pump 53 stops. However, the pump body 1 in the pump facility 10 and the power transmission mechanism 3 that is an incidental facility require time until it completely stops because the inertial force due to the rotation of the rotating members is working. Therefore, means for supplying the lubricating oil to the lubricating oil supply target is necessary during this period. At this time, since the rotary pump 58 provided in the power transmission mechanism 3 also continues to rotate for a while, the rotary pump 58 continues to operate until the pump body 1 and the power transmission mechanism 3 are completely stopped. In addition, the electromagnetic valve 61 provided in the middle of the first lubricating oil recovery line 56 that normally returns the lubricating oil to the oil tank 51 is demagnetized due to a power failure or the like, and mechanically due to the elastic force of the spring member provided therein. close up.

  As a result, the lubricating oil normally returned to the oil tank 51 passes through the first lubricating oil supply line 52 via the second lubricating oil supply line 62 that is the emergency lubricating oil supply line, and passes through the first lubricating oil supply line 52. To the bearings 12, 13, 22, 23 and the power transmission mechanism 3. As a result, until the pump body 1 and the power transmission mechanism 3 are stopped in the event of an emergency such as a power failure, the bearings 12, 13, 22, and 23 are burned out and the power transmission mechanism 3 that is ancillary equipment of the pump equipment 10 is damaged. Preventive effect is obtained.

FIG. 2 is a diagram schematically showing an overall configuration of a lubricating oil supply system 150 for pump equipment according to a comparative example.
A lubricating oil supply system 150 according to the comparative example shown in FIG. 2 includes a rotary pump 58, an oil intake line 59, a second lubricating oil recovery line 60, and a solenoid valve 61 in the lubricating oil supply system 50 according to the present embodiment shown in FIG. , And the second lubricating oil supply line 62 is not provided. On the other hand, the lubricating oil supply system 150 according to the comparative example includes an emergency lubricating oil supply pump 151, a drive unit 151a such as a motor that drives the emergency lubricating oil supply pump 151, and an external power source such as an emergency power supply or an uninterruptible power supply. As an emergency external power supply device 152 and a power supply switching device 153. Since other configurations are the same as those of the present embodiment, description thereof is omitted.

  As shown in FIG. 2, in the lubricating oil supply system 150 according to the comparative example, when the power supply is abnormal due to a power failure or the like (emergency), the entire pump facility 10 is stopped and the lubricating oil supply pump 53 supplies the lubricating oil. Stop. At this time, only the emergency lubricating oil supply pump 151 is operated by switching from the normal power source to the emergency external power source device 152 by the power source switching device 153. Therefore, the pump body 1 and the power transmission mechanism 3 continue to rotate due to the inertial force, and the bearings 12, 13, 22, and 23 are not burned out or the power transmission mechanism 3 is not damaged until the rotation is completely stopped. Then, the lubricating oil is supplied by the emergency lubricating oil supply pump 151.

  However, in the lubricating oil supply system 150 according to the comparative example, the emergency lubricating oil supply pump 151 and the emergency external power supply device 152 must be installed, and the switching control by the power supply switching device 153 is required. Furthermore, it is difficult to secure an emergency power supply or install an external power supply such as an uninterruptible power supply in an area where infrastructure is not established overseas.

  On the other hand, since this embodiment does not require securing an emergency power source or installing an external power source such as an uninterruptible power supply, it can be implemented in an area where infrastructure is not established. Moreover, the present embodiment omits the emergency lubricating oil supply pump 151, the emergency external power supply device 152, and the power supply switching device 153 with respect to the lubricating oil supply system 150 according to the comparative example. 2 It becomes a simple structure of adding the lubricating oil supply line 62 etc., and complicated control becomes unnecessary.

  As described above, the lubricating oil supply system 50 according to this embodiment includes the rotary pump 58 that is operated by the rotation of the transmission shaft connected between the rotary shaft 21 of the drive machine 2 and the rotary shaft 11 of the pump body 1. , An oil intake line 59 through which the lubricating oil sucked up from the oil tank 51 flows toward the rotary pump 58, a second lubricating oil recovery line 60 through which the lubricating oil recovered from the rotary pump 58 to the oil tank 51 flows, (2) an electromagnetic valve 61 for opening and closing the lubricating oil recovery line 60, and a second lubricating oil supply line 62 connecting the upstream side of the electromagnetic valve 61 in the second lubricating oil recovery line 60 and the first lubricating oil supply line 52. I have.

In this embodiment, in the event of an emergency such as a power failure, the pump body 1 in the pump facility 10 and the power transmission mechanism 3 that is ancillary facilities continue to rotate due to inertial force until the rotation is completely stopped. As a power source other than electric energy, an inertial force that is maintained until the rotating member stops is used as the power source. That is, the rotary pump 58 is rotated by the inertial force of the rotating member in the pump facility 10, and the lubricant can be supplied to the lubricant supply target including the bearings 12, 13, 22, and 23 of the pump facility 10.
Therefore, according to the present embodiment, the pump facility 10 can be protected greatly by the inexpensive lubricating oil supply system 50 in which simple configurations such as the rotary pump 58 and the second lubricating oil supply line 62 are added. In addition, since complicated control is not required, the effect that modification and operation from existing facilities are easy is great.

  Even in areas where there is no problem in infrastructure development, it is not necessary to secure an emergency power supply, and installation of an external power supply such as an uninterruptible power supply can be omitted. Therefore, the initial cost including the equipment cost and the construction cost can be reduced by the amount that the emergency lubricating oil supply pump 151 and the emergency external power supply device 152 are omitted. For this reason, the equipment costs of the emergency lubricating oil supply pump 151 and the emergency external power supply device 152 that are omitted and the equipment costs of the rotary pump 58 and the second lubricating oil supply line 62 that are added in the present embodiment are integrated. When compared, the initial cost can be maintained or reduced.

  That is, according to the present embodiment, the lubricating oil can be supplied to the lubricating oil supply target including the bearings 12, 13, 22, and 23 of the pump facility 10 in an emergency with a simple configuration using energy other than electricity as a power source. A lubricating oil supply system 50 for a pump facility can be provided.

  Further, in the present embodiment, the lubricant oil supply target includes the bearings 12 and 13 that support the rotating shaft 11 of the pump body 1, the bearings 22 and 23 that support the rotating shaft 21 of the driving machine 2, and the driving machine 2. A power transmission mechanism 3 for transmitting the driving force to the pump body 1 is included.

  According to such a configuration, in the event of an emergency such as a power failure, the bearings 12 and 13 of the pump body 1, the power transmission mechanism 3 that is ancillary equipment of the pump equipment 10, and the bearings 22 and 23 of the drive machine 2 are filled with lubricant Supply can be made and protected.

  In this embodiment, the rotary pump 58 is attached to at least one of the end of the power transmission mechanism 3 on the side opposite to the drive unit 2 of the input shaft 31 and the end of the output shaft 32 on the side opposite to the pump body 1. ing.

  According to such a configuration, the end of the input shaft 31 opposite to the drive unit 2 and the end of the output shaft 32 opposite to the pump main body 1 are easy to attach the rotary pump 58 and are space for installation. There is also an advantage that it is easy to secure.

  In the present embodiment, the electromagnetic valve 61 is configured to have a mechanism that mechanically shuts off the second lubricating oil recovery line 60 when the supply of electric power is stopped.

  According to such a configuration, the solenoid valve 61 is demagnetized and mechanically closed when the power is not supplied, such as a power failure, so that the lubricating oil is supplied to the second lubricating oil supply line 62 without requiring special control. Then, it can be supplied to the lubricant supply target through the first lubricant supply line 52.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. It is possible to add, delete, and replace other configurations for a part of the configuration of the above-described embodiment.

  For example, a normally open electromagnetic valve that closes when energized and opens when not energized may be additionally provided in the middle of the second lubricating oil supply line 62. According to such a configuration, during normal times when power is supplied, the electromagnetic valve provided in the second lubricating oil supply line 62 is closed by energization so that the rotary pump 58 sucks the lubricating oil sucked up through the oil collecting line 59. All of the oil can be reliably collected in the oil tank 51. On the other hand, in an emergency such as when the supply of power is stopped, the solenoid valve provided in the second lubricating oil supply line 62 is opened by de-energization.

  Further, instead of installing the electromagnetic valve 61 described above, a switching valve, which is a two-position three-port electromagnetic valve, is provided at a connecting portion between the second lubricating oil recovery line 60 and the second lubricating oil supply line 62. May be. In this case, when energized, the switching valve communicates the upstream side and the downstream side of the switching valve in the second lubricating oil recovery line 60 and the upstream side of the switching valve in the second lubricating oil recovery line 60 and the second side. The lubricating oil supply line 62 is shut off, and when not energized, the upstream side of the switching valve in the second lubricating oil recovery line 60 communicates with the second lubricating oil supply line 62, and the second lubricating oil recovery line 60 Switching is performed so that the upstream side and the downstream side of the switching valve are shut off.

DESCRIPTION OF SYMBOLS 1 Pump main body 2 Drive machine 3 Power transmission mechanism 10 Pump equipment 11 Rotating shaft 12, 13 Bearing 21 Rotating shaft 22, 23 Bearing 31 Input shaft 32 Output shaft 33 Gear mechanism 50 Lubricating oil supply system 51 Oil tank 52 1st lubricating oil supply Line 53 Lubricating oil supply pump 54 Main pump 54a Drive 55 Auxiliary pump 55a Drive 56 56 First lubricating oil recovery line 58 Rotary pump 59 Oil collecting line 60 Second lubricating oil recovery line 61 Solenoid valve 62 Second lubricating oil supply line 151 Emergency oil supply pump 151a Drive unit 152 Emergency external power supply unit 153 Power supply switching unit

Claims (4)

An oil tank for storing lubricating oil;
A first lubricating oil supply line through which lubricating oil supplied from the oil tank flows toward a lubricating oil supply target including a bearing of a pump facility;
A lubricating oil supply pump for delivering lubricating oil through the first lubricating oil supply line;
A first lubricating oil recovery line through which lubricating oil recovered from the lubricating oil supply target flows to the oil tank;
A rotary pump that operates by rotation of a transmission shaft connected between a rotary shaft of a drive unit that drives a pump main body provided in the pump facility and a rotary shaft of the pump main body;
An oil intake line through which lubricating oil sucked up from the oil tank flows toward the rotary pump;
A second lubricating oil recovery line through which lubricating oil recovered from the rotary pump to the oil tank flows;
An electromagnetic valve provided in the middle of the second lubricating oil recovery line to open and close the second lubricating oil recovery line;
A second lubricating oil supply line connecting the upstream side of the solenoid valve in the second lubricating oil recovery line and the first lubricating oil supply line;
A lubricating oil supply system for pump equipment, comprising:   The lubricant supply target includes a bearing that supports a rotation shaft of the pump body, a bearing that supports a rotation shaft of the drive machine, and a power transmission mechanism that transmits a driving force of the drive machine to the pump body, 2. The lubricating oil supply system for pump equipment according to claim 1, wherein the power transmission mechanism includes the transmission shaft. The power transmission mechanism includes an input shaft connected to the rotation shaft of the drive machine, an output shaft connected to the rotation shaft of the pump body, and a gear mechanism that transmits the driving force of the input shaft to the output shaft. The input shaft and the output shaft constitute the transmission shaft,
The rotary pump is attached to at least one of an end portion of the input shaft opposite to the drive machine and an end portion of the output shaft opposite to the pump main body. Lubricating oil supply system for pump equipment.   The said solenoid valve has a mechanism which interrupts | blocks the said 2nd lubricating oil collection | recovery line mechanically, when supply of electric power stops, The Claim 1 characterized by the above-mentioned. Lubricating oil supply system for pump equipment.

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