JP2018188961A - Shaft seal device, shaft seal device assembly, shaft seal system, and abnormality detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and reliably detect an abnormality related to an amount of liquid supplied to a shaft seal device.SOLUTION: A shaft seal device 1 comprises a seal part 20 provided around a main shaft 50 of a pump, a housing part 101a for housing the seal part 20, a supply part 30 for supplying liquid to the seal part 20, a discharge part 40 for discharging the liquid passed through the seal part 20, to the outside, and a sensor group for detecting an abnormality related to an amount of the liquid.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a shaft seal device, a shaft seal device assembly and a shaft seal system used in a pump, and an abnormality detection method using them.

  In pump facilities used in water and sewage facilities and agricultural facilities, a gland packing is often used for a shaft seal device of a pump (see, for example, Patent Document 1). In the case of the gland packing, it is usually necessary to pour out a small amount of water for the purpose of lubricating the sliding portion of the gland packing and the packing sleeve, collecting frictional heat, and preventing air from entering the atmosphere.

  When the gland packing and the packing sleeve are worn and deteriorated over time, the amount of leakage of liquid such as water may increase. When the amount of leakage increases in this way, water can scatter around and lead to rusting and corrosion of casings, piping, and corridors. Moreover, when water mixes in the bearing case containing the oil, the bearing portion may be damaged. Furthermore, the inside of the electric wire pit on the floor of the pump chamber can be submerged, leading to poor insulation of the electrical equipment.

  In addition, if the water injection pipe provided in the shaft seal device clogs with time, the leakage (the amount of water injected from the water injection pipe) may decrease or the leakage may become “0”. There is. If the leakage amount decreases or becomes “0” in this way, lubrication is poor, which may lead to a burnout accident of the shaft seal device. In addition, when the suction pump is employed, if the water injection pipe is clogged with time, air may be sucked from the shaft seal device, and the water in the pump may be dropped.

  In the case of a self-water injection type in which a pump whose rotation speed is controlled is employed and water in the pump is supplied to the shaft seal device, the amount of water injection changes depending on the rotation speed of the pump. That is, when the rotational speed of the pump is high, the leakage amount becomes excessive, and when the rotational speed is low, the leakage amount becomes excessive. Such a change in the leakage amount can lead to the above-described disadvantages.

  Also, due to cost reasons and manpower (unmanned aircraft field), even if an abnormality such as excessive leakage occurs, it is not grasped and is often left unattended. In this case, the damage may increase.

JP2013-224715A

  The present invention has been made in view of such a point, and a shaft seal device, a shaft seal device assembly, and a shaft capable of quickly and reliably detecting an abnormality related to the amount of liquid supplied to the shaft seal device. A sealing system and an abnormality detection method using them are provided.

A shaft seal device according to the present invention comprises:
A seal provided around the main shaft of the pump;
An accommodating portion for accommodating the seal portion;
A supply unit for supplying a liquid to the seal unit;
A discharge part for discharging the liquid having passed through the seal part to the outside;
A sensor group for detecting an abnormality related to the amount of the liquid;
May be provided.

A shaft seal device according to the present invention comprises:
A drain pipe through which the liquid discharged from the discharge portion flows;
The sensor group may include a flow rate detection unit that detects a flow rate of the liquid flowing in the drain pipe.

A shaft seal device according to the present invention comprises:
A drain receiving portion for receiving the liquid discharged from the discharging portion;
A drain pipe through which the liquid discharged from the discharge portion flows, and
The sensor group may include a first water leakage detection unit provided in the drain receiving unit.

A shaft seal device according to the present invention comprises:
A drain receiving portion for receiving the liquid discharged from the discharging portion;
A drain pipe through which the liquid discharged from the discharge portion flows, and
The sensor group may include a liquid amount detection unit for detecting the amount of liquid accumulated in the drain receiving unit.

In the shaft seal device according to the present invention,
The sensor group may include a temperature detection unit provided outside the peripheral edge of the seal unit and provided in the housing unit.

A shaft seal device according to the present invention comprises:
A gap adjusting part for adjusting a sealing function by the seal part by adjusting a gap;
The sensor group may include a gap sensor that detects the gap.

In the shaft seal device according to the present invention,
The amount of liquid supplied to the seal portion may be adjustable.

The shaft seal device assembly according to the present invention is:
The aforementioned shaft seal device,
A bearing portion for receiving the main shaft;
With
A second water leakage detector may be provided on the surface of the bearing portion on the shaft seal device side.

The shaft seal system according to the present invention comprises:
The aforementioned shaft seal device or the aforementioned shaft seal device assembly; and
A control unit for determining the presence or absence of the abnormality based on a detection result by the sensor group;
A notification unit for reporting information on the abnormality;
May be provided.

The abnormality detection method according to the present invention includes:
A seal portion provided around the main shaft of the pump, an accommodating portion for accommodating the seal portion, a supply portion for supplying liquid to the seal portion, and a discharge portion for discharging the liquid that has passed through the seal portion to the outside, A sensor group for detecting an abnormality relating to the amount of the liquid, and an abnormality detection method using a shaft seal device having:
Obtaining information on the amount of the liquid based on information from the sensor group;
A step of determining the presence or absence of the abnormality based on a detection result by the sensor group by a control unit;
A step of notifying information related to the abnormality by a notification unit;
May be provided.

Effects of the present invention

  In this invention, since it has the sensor group which detects the abnormality regarding the quantity of the liquid supplied to a shaft seal apparatus, the said abnormality can be detected quickly and reliably.

FIG. 1 is a sectional view showing an outline of a fluid machine according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the shaft seal device and the bearing portion according to the embodiment of the present invention. FIG. 3 is a diagram showing an example of a configuration of a supply unit that can be used in the embodiment of the present invention. FIG. 4 is a diagram showing another example of the configuration of the supply unit that can be used in the embodiment of the present invention. FIG. 5 is a diagram showing a flow of an abnormality detection process during pump operation that can be used in the embodiment of the present invention. FIG. 6 is a diagram showing a flow of an abnormality detection process when the pump is stopped, which can be used in the embodiment of the present invention. FIG. 7 is a diagram showing an example of a shaft seal system that can be used in the embodiment of the present invention. FIG. 8 is a diagram showing another example of a shaft seal system that can be used in the embodiment of the present invention.

Embodiment << Configuration >>
Embodiments of a shaft seal device, a shaft seal device assembly, a shaft seal system, a liquid device system, and an abnormality detection method using these according to the present invention will be described below with reference to the drawings. In the embodiment shown in FIG. 1, a horizontal axis pump is shown as a pump. However, the present invention is not limited to this, and the present embodiment can also be applied to a vertical axis pump. In the present embodiment, a configuration including a pump and a shaft seal device, a shaft seal device assembly, or a shaft seal system is referred to as a liquid device system.

  As shown in FIG. 1, the pump 100 may include a pump casing 101 and an impeller 106 accommodated in the pump casing 101. The impeller 106 may be fixed to the main shaft 50 and may rotate around the main shaft 50 integrally with the main shaft 50. For example, the pump 100 may pressurize a liquid such as water sucked from a suction port (not shown) with the impeller 106 and discharge the liquid from a discharge port (not shown).

  The main shaft 50 may be provided so as to penetrate the pump casing 101 and may be rotatably supported by the bearing portion 110. Further, a drive mechanism (not shown) for rotating the main shaft 50 may be provided on one end side of the main shaft 50, and the main shaft 50 may be rotated by this drive mechanism. A shaft seal device 1 that rotatably supports the main shaft 50 may be provided at a location where the main shaft 50 passes through the pump casing 101. The shaft seal device 1 can prevent liquid such as water in the pump casing 101 from leaking from the penetrating portion of the main shaft 50 to the atmosphere side, and can prevent air from being sucked into the pump casing 101.

  As shown in FIG. 2, the shaft seal device 1 according to the present embodiment includes a seal portion 20 provided around the main shaft 50, an accommodating portion 101 a including a stuffing box that accommodates the seal portion 20, and a seal portion. 20, a supply unit 30 for supplying a liquid such as water, a discharge unit 40 for discharging the liquid that has passed through the seal unit 20 to the outside, and a sensor group for detecting an abnormality related to the amount of liquid supplied to the seal unit 20; You may have. The sensor group is for acquiring information related to the amount of liquid supplied to the seal unit 20, and based on the information from the sensor group, the presence or absence of an abnormality related to the amount of liquid may be determined. . In addition, the term “sensor group” in the present application includes an aspect including one sensor.

  The seal portion 20 may be, for example, a gland packing, a mechanical seal, or the like, but will be described below using an aspect in which the seal portion 20 is a gland packing. The accommodating part 101a may be a part of the pump casing 101, or may be a member different from the pump casing 101. A part of the accommodating part 101a is constituted by the pump casing 101, and the remaining part is different. You may comprise from a member.

  The supply unit 30 may include a water injection pipe 35 as illustrated in FIG. 2, or may include an internal supply unit 31 that supplies liquid along the main shaft 50, or the water injection pipe 35 and the internal supply unit. 31 may be included. When the self-water injection type is adopted, water is supplied from the pump 100 to the water injection pipe 35. In this case, the amount of water supplied varies depending on the rotational speed of the pump 100. When the rotational speed is high, the amount of water supplied increases. When the rotational speed is low, the amount of water supplied decreases. Become. For this reason, when the rotational speed is constant, a certain amount of water is supplied to the water injection pipe 35. Unlike the self-water injection type, when water is supplied to the water injection pipe 35 from the outside, generally, water is supplied to the water injection pipe 35 while the pump 100 is operating, and while the pump 100 is stopped. Water is not supplied to the water injection pipe 35. Note that the shaft seal device 1 shown in FIG. 2 has a configuration different from that of the shaft seal device 1 shown in FIG.

  As illustrated in FIG. 2, the shaft seal device 1 may include a drain pipe 90 through which the liquid discharged from the discharge unit 40 flows. In this case, the sensor group may include a flow rate detection unit 11 that detects the flow rate of the liquid flowing in the drain pipe 90.

  A drain receiving portion 80 for receiving the liquid discharged from the discharge portion 40 may be provided in the vicinity of the inlet of the drain pipe 90. In this case, the sensor group may include the first water leakage detection unit 15 provided in the drain receiving unit 80 or the liquid amount detection unit 12 for detecting the amount of liquid accumulated in the drain receiving unit 80. May be. The liquid amount detection unit 12 may be a float type that floats on the liquid surface. The liquid amount detection unit 12 may be of an on / off type, and is turned on when the water level is equal to or higher than a certain height, and may be turned off when the water level is less than a certain height. It may be turned off when the water level is higher than a certain height, and may be turned on when the water level is less than a certain height. When both the first water leakage detection unit 15 and the liquid amount detection unit 12 are provided, the first water leakage detection unit 15 may be provided at a position below the liquid amount detection unit 12. In this case, in the normal state, the first water leakage detection unit 15 detects the presence of liquid such as water, and in the abnormal state, the first water leakage detection unit 15 detects water or the like. It may be detected that no liquid is present.

  The drain receiving portion 80 may have an overflow hole 81 for overflowing an excessive amount of liquid such as water. In this case, the liquid amount detection unit 12 may detect an abnormality before the liquid flows out of the overflow hole 81. According to such an aspect, it is advantageous in that it is possible to notify in advance of water leakage to the pump chamber floor.

  Unlike the above, the first water leakage detection unit 15 may be provided at a position higher than the liquid amount detection unit 12. Moreover, the 1st water leak detection part 15 may be provided in the area | region which does not get wet when the shaft seal apparatus 1 is working normally.

  The sensor group is located outside the peripheral edge of the seal portion 20 (outward in the radial direction of the main shaft 50) and on the outer surface of the housing portion 101a (the upper surface of the housing portion 101a in the embodiment shown in FIG. 1). You may have. In the present embodiment, the temperature detection unit 14 will be described using an embodiment in which the temperature detection unit 14 is provided on the outer surface of the storage unit 101a. However, the present invention is not limited to this. For example, the temperature detection unit 14 is provided in the storage unit 101a. May be.

  A gap adjusting unit that adjusts the sealing function (sealing condition) by the sealing unit 20 by adjusting the gap may be provided. In this case, the sensor group may include a gap sensor 16 that detects the gap. As an example, the gap extends along the axial direction of the main shaft 50 between the peripheral edge portion (upper end portion in FIG. 2) of the ground retainer 102 and the peripheral edge portion (upper end portion in FIG. 2) of the housing portion 101a such as the stuffing box. The gap can be adjusted by adjusting the tightening degree of the fastening member 61 such as a screw. In this case, the fastening member 61 constitutes a gap adjusting part. When the gap is below a certain value, the gap sensor 16 notifies the control unit 200 which will be described later, and the notifying unit such as the display unit 210 described later notifies the seal unit 20 or the seal unit 20 and the main shaft 50 between them. Exchange of the packing sleeve 51 provided between them may be promoted.

  The second water leakage detection unit 13 may be provided on the surface of the bearing unit 110 on the shaft seal device 1 side (the right side surface in FIG. 2). The first water leak detector 15 and the second water leak detector 13 may be the same member or different members.

  The amount of liquid supplied to the seal unit 20 may be adjustable. As an example, the supply pipe 36 that supplies the liquid to the seal portion 20 may include two or more supply pipes having different diameters. In the embodiment shown in FIG. 3, the supply unit 30 includes a first supply pipe 36a, a first opening 38a such as an orifice provided in the first supply pipe 36a, a second supply pipe 36b, and a second supply pipe 36b. And a second opening 38b such as an orifice having a diameter larger than that of the first opening 38a. For example, the first opening 38a and the second opening 38b are not provided, and the diameter of the second supply pipe 36b is generally larger than the diameter of the first supply pipe 36a. Aspects may be adopted.

  As shown in FIG. 3, the first supply pipe 36a is provided with a first adjustment valve 37a such as an electric valve that controls opening and closing, and the second supply pipe 36b is provided with a second adjustment valve such as an electric valve that controls opening and closing. 37b may be provided. The first adjustment valve 37a and the second adjustment valve 37b may be controlled in response to a signal from the control unit 200 described later. Further, the first adjustment valve 37a and the second adjustment valve 37b are not used, and the first supply pipe 36a and the second supply pipe 36b can be appropriately switched by a switching unit such as a switching valve. Also good.

  As another example, as shown in FIG. 4, a supply liquid amount adjustment unit 39 may be provided in the supply pipe 30 connected to, for example, the water injection pipe 35 or the water injection pipe 35 of the supply section 30. The supply liquid amount adjustment unit 39 may be controlled by receiving a signal from the control unit 200 described later.

  3 and 4, a liquid such as water in the pump casing 101 is supplied to the supply pipe 36, but the present invention is not limited to this, and a storage tank different from the pump casing 101 is provided. A liquid such as water may be supplied to the supply pipe 36 from the storage tank.

  When the pump 100 whose rotational speed is controlled is adopted, when the amount of self-water injection decreases during low-speed operation, the amount of liquid such as water supplied to the water injection pipe 35 is increased, On the other hand, when the self-water injection amount increases during high-speed operation, the amount of liquid such as water supplied to the water injection pipe 35 may be reduced. More specifically, in the mode shown in FIG. 3, during low speed operation, the first adjustment valve 37a is closed and the second adjustment valve 37b is opened, via the second supply pipe 36b and the second opening 38b. The liquid is supplied to the water injection pipe 35, and at the time of high speed operation, the first adjustment valve 37a is opened and the second adjustment valve 37b is closed, and the liquid is supplied through the first supply pipe 36a and the first opening 38a. 35 may be supplied. In the mode shown in FIG. 4, the opening degree of the supply liquid amount adjustment unit 39 may be increased during low speed operation, and the opening degree of the supply liquid amount adjustment unit 39 may be reduced during high speed operation.

  Note that when the amount of liquid such as water supplied to the water injection pipe 35 is small, it is difficult to adjust the amount of the liquid, so the size is not the supply liquid amount adjustment unit 39 shown in FIG. It is beneficial to use an embodiment having two or more types of openings (see FIG. 3).

  As shown in FIGS. 7 and 8, a control unit 200 that controls the shaft seal device 1 and determines an abnormality in the amount of liquid supplied to the seal unit 20 based on the detection result by the sensor group may be provided. . The control unit 200 may be provided in the same room as the shaft seal device 1 or may be provided in a different room from the shaft seal device 1. Moreover, the control part 200 may be provided in a place different from the shaft seal device 1, and the shaft seal device 1 may be operated remotely.

  As shown in FIGS. 7 and 8, a display unit 210 that displays a detection result by the sensor group may be provided. The display unit 210 may be provided in the same room as the shaft seal device 1 or may be provided in a different room from the shaft seal device 1. The display unit 210 may be provided at a location different from the shaft seal device 1 and / or the control unit 200, and the detection result by the sensor group can be confirmed at a location away from the shaft seal device 1 and / or the control unit 200. It may be like that. In the present embodiment, the display unit 210 will be described as the notification unit. However, the present invention is not limited to this, and a sound source unit that notifies by sound such as voice may be employed as the notification unit.

  As shown in FIG. 8, the control unit 200 and the display unit 210 may be a communication control unit 200a and a communication display unit 210a of a communication terminal 250 such as a smartphone or a tablet.

  The control unit 200 may have an artificial intelligence function. In this case, the machine learning may be performed in response to feedback from the administrator when the control unit 200 determines that there is an abnormality, or the abnormality is detected although the control unit 200 determines that the abnormality is normal. If it is found, machine learning may be performed by receiving feedback of the contents.

  When a mechanical seal is employed as the seal portion 20, the liquid does not leak to the outside. For this reason, when there is wetness or when the temperature detector 14 detects a temperature outside the allowable range, the controller 200 determines that there is an abnormality.

《Action ・ Effect》
Next, operations and effects according to the present embodiment having the above-described configuration, which have not been described yet, will be mainly described. Note that the aspect described in “Operation / Effect” can also be applied to the “Configuration”.

  In the present embodiment, when an aspect having a sensor group that detects an abnormality related to the amount of liquid supplied to the seal portion 20 is employed, the abnormality can be detected quickly and reliably. For this reason, it is possible to prevent the abnormality from being left for a long time and as a result, damage is increased. Further, when no abnormality has occurred, it can be simply explained that no abnormality has occurred for a user who is sensitive to the abnormality. Furthermore, the user himself can confirm that no abnormality has occurred, and can prevent unnecessary requests from the administrator for work requests. Moreover, since the presence / absence of abnormality can be objectively determined, it is possible to prevent the evaluation of the presence / absence of abnormality from being changed by a judge, and thus even an administrator with little experience or a user with little knowledge can make an objective judgment. It becomes like this.

  As shown in FIG. 2, when the aspect having the flow rate detection unit 11 that detects the flow rate of the liquid flowing in the drain pipe 90 is adopted, it is determined whether the flow rate is normal based on the information from the flow rate detection unit 11. It is beneficial in that it can be done. For example, the flow rate detection unit 11 can detect that the flow rate is abnormally low when the flow rate is less than the first flow rate threshold value, and the flow rate is abnormally high when the flow rate exceeds the second flow rate threshold value. Can be detected.

  When the first water leak detection unit 15 is provided in the drain receiving unit 80, it can be detected whether the first water leak detection unit 15 is wet. When the liquid is no longer detected by the first water leakage detection unit 15 in the mode shown in FIG. 2, there is a possibility that the shaft seal device 1 may be burned out. . In addition, when the pump 100 is a suction type, air is sucked into the pump casing 101 as a result of the lack of liquid supplied to the seal portion 20, and water in the pump casing 101 falls. It is also useful in that it can be prevented in advance.

  When the liquid amount detector 12 for detecting the amount of liquid accumulated in the drain receiver 80 is provided, the amount of liquid accumulated in the drain receiver 80 can be detected. The liquid amount detection unit 12 may detect only whether the water level or the like is equal to or higher than a certain threshold value, but the liquid amount is abnormally small when the liquid amount is less than the first liquid amount threshold value. It may be detected that the liquid amount is abnormally large when the liquid amount exceeds the second liquid amount threshold.

  When the temperature detection unit 14 is provided outside the periphery of the seal unit 20 and in the storage unit 101a, an abnormality can be detected based on the temperature of the surface of the storage unit 101a. When the amount of liquid supplied to the seal unit 20 is small, the surface of the storage unit 101a becomes high. As a result, it can be detected that an abnormality with a small amount of liquid has occurred, and the shaft seal device 1 is burned out. The possibility of being lost can be reduced. If the temperature detected by the temperature detection unit 14 is lower than the assumed temperature, it may be detected that the amount of liquid is large. Moreover, the temperature detection part 14 may also detect ambient temperature (for example, air temperature), and may detect that temperature is too high or too low on the basis of peripheral temperature. In this case, it is useful in that it is possible to determine whether or not the temperature is abnormal in consideration of the ambient temperature and to improve the measurement accuracy.

  When the gap sensor 16 that detects the gap of the gap adjusting unit is provided, it is advantageous in that it can be easily determined whether or not the gap can be further adjusted by tightening the fastening member 61. In addition, when the gap cannot be made smaller than the above state, it is necessary to replace the seal portion 20 made of gland packing or the like and the packing sleeve 51.

  When adopting a mode in which the second water leakage detector 13 is provided on the surface of the bearing 110 that receives the main shaft 50 of the shaft seal device 1, it is determined whether or not liquid has adhered to the surface of the bearing 110 (for example, a bearing cover). It is useful in that it can be judged. When the shaft seal device 1 is operating normally, no liquid adheres to the surface of the bearing portion 110. For this reason, by providing the second water leakage detection unit 13, it is possible to quickly and surely detect an abnormality that the liquid adheres to the surface of the bearing unit 110, and thus, it is possible to prevent the liquid from entering the bearing unit 110. Is beneficial. In addition, the liquid adhering to the surface of the bearing part 110 is the water which was discharged | emitted from the discharge part 40 and scattered, for example.

  When the control unit 200 for controlling the shaft seal device 1 is provided, it is possible to determine an abnormality in the amount of liquid supplied to the seal unit 20 based on the detection result by the sensor group, and the first adjustment valve 37a and the second adjustment valve 37b are controlled (see FIG. 3), and the supply liquid amount adjusting unit 39 can be controlled (see FIG. 4). When the control unit 200 is provided in a place different from the shaft seal device 1, it is advantageous in that the shaft seal device 1 can be operated remotely.

  In the case where the display unit 210 for displaying the detection result by the sensor group is provided, it is advantageous in that the detection result can be easily confirmed. If the display unit 210 is provided at a different location from the shaft seal device 1 and the administrator can confirm the display content on the display unit 210 at a remote location, the administrator can detect the abnormality without going to the user. This is useful in that it can be confirmed whether it has occurred. In such a case, it is beneficial in that it is possible to prevent the occurrence of a situation in which an administrator has to go to the user as a result of a lack of knowledge of the user.

  In the case where the control unit 200 and the display unit 210 are the communication control unit 200 and the communication display unit 210 of the communication terminal as shown in FIG. 8, the administrator can check whether there is an abnormality from the outside, and if necessary, This is advantageous in that the shaft seal device 1 can also be controlled. Examples of the control of the shaft seal device 1 include switching between the first adjustment valve 37a and the second adjustment valve 37b, and adjusting the opening degree of the supply liquid amount adjustment unit 39.

≪Method≫
The control unit 200 may adopt the following process to determine whether there is an abnormality, and the display unit 210 may display the determination result in the control unit 200. The mode shown in FIG. 5 is an example of a determination process when the pump 100 is operating, and the mode shown in FIG. 6 is an example of a determination process when the pump 100 is not operating.

[During operation of pump 100]
First, based on information from the flow rate detection unit 11, the control unit 200 detects the flow rate of the liquid flowing in the drain pipe 90 (see S11 in FIG. 5).

  When the control unit 200 determines that the flow rate in the drain pipe 90 is larger than the allowable amount, the control unit 200 causes the drain receiving unit 80 to supply the excess liquid to the drain receiving unit 80 based on the information from the liquid amount detection unit 12. Is determined (see S21 in FIG. 5). Moreover, it is judged by the control part 200 whether the liquid has adhered to the bearing part 110 based on the information from the 2nd water leak detection part 13 provided in the surface at the side of the shaft seal device 1 of the bearing part 110 ( (See S21 in FIG. 5).

  Based on information from the liquid amount detection unit 12, the control unit 200 determines that excess drainable liquid has accumulated in the drain receiving unit 80, or liquid based on information from the second water leakage detection unit 13. If it is determined that the liquid is attached to the bearing unit 110, the control unit 200 determines that there is a possibility that the amount of liquid is large. At this time, the control unit 200 determines whether the control unit 200 can reduce the gap based on information from the gap adjustment unit (see S41 in FIG. 5).

  When the control unit 200 determines that the gap can be reduced, adjustment by the gap adjustment unit may be prompted by a notification unit such as the display unit 210 (see S52 in FIG. 5). On the other hand, when it is determined by the control unit 200 that the gap cannot be reduced, the notification unit such as the display unit 210 may prompt the replacement of the seal unit 20 and the packing sleeve 51 made of gland packing or the like (see FIG. 5 (see S53).

  The control unit 200 determines that the liquid within the allowable amount is not accumulated in the drain receiving unit 80 based on the information from the liquid amount detection unit 12, and the liquid is a bearing based on the information from the second water leakage detection unit 13. When it is determined that the liquid is not attached to the unit 110, the control unit 200 determines that it is not necessary to take immediate action although the flow rate is large. In this case, a notification unit such as the display unit 210 or the like may be informed that it is not necessary to take immediate action but be careful (see S51 in FIG. 5).

  When the control unit 200 determines that the flow rate of the liquid flowing in the drain pipe 90 is within the allowable range based on the information from the flow rate detection unit 11, the first water leakage detection unit provided in the drain receiving unit 80. Based on the information from 15, whether or not the liquid can be detected by the control unit 200 is determined (see S31 in FIG. 5). Further, based on information from the temperature detection unit 14 provided on the surface of the storage unit 101a (for example, the surface of the stuffing box), it is determined whether or not the surface of the storage unit 101a has an allowable temperature (FIG. 5). S31).

  When it is determined by the control unit 200 that the liquid has been detected by the first water leakage detection unit 15, and it is determined that the surface of the storage unit 101a is within the allowable range, the control unit 200 is in a normal state. Judgment is made (see S55 in FIG. 5).

  On the other hand, when it is determined by the control unit 200 that no liquid is detected by the first water leakage detection unit 15 or when it is determined that the surface of the storage unit 101a exceeds the allowable temperature, the control unit 200 supplies the liquid. It is judged that there is a possibility that the amount of liquid such as water is small. In this case, a notification unit such as the display unit 210 may notify that there is a possibility that the liquid amount is small (see S54 in FIG. 5). In addition, information that prompts the user to loosen the fastening member 61 or confirm the clogging of the supply pipe 36 or the water injection pipe 35 may be displayed on the display unit 210.

[When pump 100 is stopped]
In the case of the push-type pump 100, since water is stored in the pump 100, water is supplied to the seal portion 20 via the internal supply portion 31 even when the pump 100 is stopped. . On the other hand, in the case of the suction type pump 100, when the pump 100 is stopped, water is not stored in the pump 100, and water is not supplied to the seal portion 20. In addition, as described above, even when water is injected into the water injection pipe 35 from the outside instead of the self-water injection type, generally, water is supplied to the water injection pipe 35 while the pump 100 is operating, and the pump 100 is stopped. While the water is being supplied, water is not supplied to the water injection pipe 35. For this reason, the following description will be made assuming the push-type pump 100.

  First, based on information from the flow rate detection unit 11, the control unit 200 detects the flow rate of the liquid flowing in the drain pipe 90 (see S11 in FIG. 6).

  When the control unit 200 determines that the flow rate in the drain pipe 90 is larger than the allowable amount, the control unit 200 causes the drain receiving unit 80 to supply the excess liquid to the drain receiving unit 80 based on the information from the liquid amount detection unit 12. Is determined (see S21 of FIG. 6). Moreover, it is judged by the control part 200 whether the liquid has adhered to the bearing part 110 based on the information from the 2nd water leak detection part 13 provided in the surface at the side of the shaft seal device 1 of the bearing part 110 ( (See S21 in FIG. 6).

  Based on information from the liquid amount detection unit 12, the control unit 200 determines that excess drainable liquid has accumulated in the drain receiving unit 80, or liquid based on information from the second water leakage detection unit 13. If it is determined that the liquid is attached to the bearing unit 110, the control unit 200 determines that there is a possibility that the amount of liquid is large. At this time, the control unit 200 determines whether the control unit 200 can reduce the gap based on information from the gap adjustment unit (see S41 in FIG. 6).

  When the control unit 200 determines that the gap can be reduced, adjustment by the gap adjustment unit may be prompted by a notification unit such as the display unit 210 (see S52 in FIG. 6). On the other hand, when it is determined by the control unit 200 that the gap cannot be reduced, the notification unit such as the display unit 210 may prompt the replacement of the seal unit 20 and the packing sleeve 51 made of gland packing or the like (see FIG. 6 (see S53).

  The control unit 200 determines that the liquid within the allowable amount is not accumulated in the drain receiving unit 80 based on the information from the liquid amount detection unit 12, and the liquid is a bearing based on the information from the second water leakage detection unit 13. When it is determined that the liquid is not attached to the unit 110, the control unit 200 determines that it is not necessary to take immediate action although the flow rate is large. In this case, a notification unit such as the display unit 210 or the like may be informed that it is not necessary to take immediate action but be careful (see S51 in FIG. 6).

  When the control unit 200 determines that the flow rate of the liquid flowing in the drain pipe 90 is within the allowable range based on the information from the flow rate detection unit 11, the first water leakage detection unit provided in the drain receiving unit 80. Based on the information from 15, whether or not the liquid can be detected by the control unit 200 is determined (see S32 in FIG. 6).

  When the control unit 200 determines that the liquid is detected by the first water leakage detection unit 15, the control unit 200 determines that the liquid is in a normal state (see S55 in FIG. 6).

  On the other hand, when the control unit 200 determines that no liquid is detected by the first water leakage detection unit 15, the control unit 200 determines that there is a possibility that the amount of liquid such as water supplied is small. In this case, a notification unit such as the display unit 210 may notify that there is a possibility that the amount of liquid may be small but that no immediate action is necessary, and that attention should be paid (see S56 in FIG. 6). .

  When it is determined that the flow rate of the liquid supplied from the supply unit 30 is large at each of the operation and stop of the pump 100, the first adjustment valve 37a is opened and the second adjustment is performed in the mode shown in FIG. The valve 37b may be closed, and the liquid may be supplied to the water injection pipe 35 via the first supply pipe 36a and the first opening 38a. Conversely, when it is determined that the flow rate of the liquid supplied from the supply unit 30 is small, the first adjustment valve 37a is closed and the second adjustment valve 37b is opened, and the second supply pipe 36b and the second opening 38b are opened. The liquid may be supplied to the water injection pipe 35 via the first supply valve 36a, the first adjustment valve 37a and the second adjustment valve 37b are opened, and the first supply pipe 36a, the first opening 38a and the second supply pipe 36b are opened. The liquid may be supplied to the water injection pipe 35 via the second opening 38b. In addition, when it is determined that the flow rate of the liquid supplied from the supply unit 30 is large, the opening degree of the supply liquid amount adjustment unit 39 is reduced in the aspect shown in FIG. When it is determined that the flow rate of the liquid is small, the opening degree of the supply liquid amount adjustment unit 39 may be increased in the aspect shown in FIG.

  The description of the above-described embodiment and the disclosure of the drawings are merely examples for explaining the invention described in the claims, and are described in the claims by the description of the above-described embodiments or the disclosure of the drawings. The invention made is not limited. In addition, it should be noted that the scope of claims at the beginning of the application is merely an example, and the contents may be expanded and changed.

DESCRIPTION OF SYMBOLS 1 Shaft seal apparatus 11 Flow volume detection part 12 Liquid quantity detection part 13 Second water leak detection part 14 Temperature detection part 15 First water leak detection part 16 Gap sensor 20 Seal part 30 Supply part 50 Main axis 61 Fastening member (gap adjustment part)
80 Drain receiving part 90 Drain pipe 101a Housing part 110 Bearing part 200 Control part 210 Display part (notification part)

Claims (10)

A seal provided around the main shaft of the pump;
An accommodating portion for accommodating the seal portion;
A supply unit for supplying a liquid to the seal unit;
A discharge part for discharging the liquid having passed through the seal part to the outside;
A sensor group for detecting an abnormality related to the amount of the liquid;
A shaft seal device comprising: A drain pipe through which the liquid discharged from the discharge portion flows;
The shaft seal device according to claim 1, wherein the sensor group includes a flow rate detection unit that detects the flow rate of the liquid flowing in the drain pipe. A drain receiving portion for receiving the liquid discharged from the discharging portion;
A drain pipe through which the liquid discharged from the discharge portion flows, and
The shaft seal device according to claim 1, wherein the sensor group includes a first water leak detection unit provided in the drain receiving unit. A drain receiving portion for receiving the liquid discharged from the discharging portion;
A drain pipe through which the liquid discharged from the discharge portion flows, and
The shaft seal device according to any one of claims 1 to 3, wherein the sensor group includes a liquid amount detection unit for detecting a liquid amount accumulated in the drain receiving unit.   5. The shaft seal device according to claim 1, wherein the sensor group includes a temperature detection unit provided outside the periphery of the seal unit and provided in the housing unit. 6. A gap adjusting part for adjusting a sealing function by the seal part by adjusting a gap;
The shaft seal device according to claim 1, wherein the sensor group includes a gap sensor that detects the gap.   The shaft seal device according to any one of claims 1 to 6, wherein an amount of liquid supplied to the seal portion can be adjusted. A shaft seal device according to any one of claims 1 to 7,
A bearing portion for receiving the main shaft;
With
A shaft seal device assembly, wherein a second water leakage detector is provided on a surface of the bearing portion on the shaft seal device side. A shaft seal device according to any one of claims 1 to 7, or a shaft seal device assembly according to claim 8.
A control unit for determining the presence or absence of the abnormality based on a detection result by the sensor group;
A notification unit for reporting information on the abnormality;
A shaft seal system characterized by comprising: A seal portion provided around the main shaft of the pump, an accommodating portion for accommodating the seal portion, a supply portion for supplying liquid to the seal portion, and a discharge portion for discharging the liquid that has passed through the seal portion to the outside, A sensor group for detecting an abnormality relating to the amount of the liquid, and an abnormality detection method using a shaft seal device having:
Obtaining information on the amount of the liquid based on information from the sensor group;
A step of determining the presence or absence of the abnormality based on a detection result by the sensor group by a control unit;
A step of notifying information related to the abnormality by a notification unit;
An abnormality detection method characterized by comprising: