JP2020079620A - Coupling guard, and rotary machine device - Google Patents

Abstract

To detect vibration of a rotary machine continuously for a long time.SOLUTION: A coupling guard is proposed for covering coupling connecting a drive shaft of a prime mover and a main shaft of a rotary machine. The coupling guard comprises at least one sensor comprising at least one first detection unit that can detect a distance to the coupling in a non-contact manner.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coupling guard and a rotating machine device.

Vibration due to an abnormality of a rotary machine such as a pump, a motor, a blower, or a turbine causes noise and promotes fatigue of members and shortens the life of the device. Therefore, conventionally, vibration is measured at the time of abnormality or maintenance. In general, abnormal vibrations of rotating machinery are prominent in rotating parts.Therefore, measuring instruments for pump vibrations should be used in the horizontal and vertical directions that pass through the center of the bearing at or near the bearing that supports the main shaft of the pump. Attached to (ISO
10816-7). Further, Patent Document 1 provides a pump device that can obtain vibration information for managing the operating state regardless of the shape of the pump, and a method of monitoring the pump device.

JP, 2016-188637, A

  The normal range of vibration of rotating machinery varies depending on the installed foundation, piping, flow rate, etc., and it is difficult to specify the normal range. Therefore, there is a demand to measure vibration continuously for a long period from the normal state, and to make a diagnosis based on a temporal change in the measurement result, not only at the time of abnormality or maintenance.

  The present invention has been made in view of the above circumstances, and an object thereof is to continuously detect vibration of a rotating machine for a long period of time.

  According to an aspect of the present invention, a coupling guard for covering a coupling connecting a drive shaft of a prime mover and a main shaft of a rotating machine is proposed. The coupling guard includes at least one sensor including a first detection unit that can detect the distance to the coupling in a non-contact manner. Accordingly, the vibration of the rotating machine can be continuously detected for a long time by the sensor provided in the coupling guard.

It is a schematic block diagram which shows the pump apparatus as an example of the rotary machine apparatus which concerns on one Embodiment of this invention. It is a perspective view showing a coupling guard concerning an embodiment. It is a front view showing a coupling guard concerning an embodiment. It is a block diagram of a sensor main body. It is a XX arrow line view of FIG. It is sectional drawing which shows the inside of the coupling guard in the pump apparatus of a modification along the axial line AL. It is sectional drawing which shows the inside of the coupling guard in the pump apparatus of a modification along the axial line AL. It is sectional drawing which shows the coupling guard of a modification along the axial line AL. It is sectional drawing which shows the coupling guard of a modification along the axial line AL. It is a schematic block diagram which shows the pump apparatus of a modification. It is a schematic block diagram which shows an example of the pump apparatus of Embodiment 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in the drawings, the same or corresponding components are denoted by the same reference numerals, and duplicate description will be omitted.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram showing a pump device as an example of a rotary machine device according to an embodiment of the present invention. In FIG. 1, the axial direction Ad, the horizontal direction Hd, and the vertical direction Vd are also shown together. In the following drawings, some of the axial direction Ad, the horizontal direction Hd, and the vertical direction Vd may also be shown together. As shown in FIG. 1, the pump device 20 includes a motor 30 as a prime mover, a pump 40 as a rotary machine, a coupling 50, a base (base portion) 60, and a coupling guard 100. In this embodiment, the motor 30 and the pump 40 are installed on the common base 60. In one embodiment, the motor 30 and pump 40 are mounted on separate bases 60. The drive shaft 31 of the motor 30 is connected to the main shaft 41 of the pump 40 via the coupling 50. In the pump 40, the torque of the drive shaft 31 is transmitted to the main shaft 41 via the coupling 50, whereby the impeller (not shown) fixed to the main shaft 41 is rotated to transfer the fluid. One end 31 a of the drive shaft 31 extending from the bracket of the motor 30 and one end 41 a of the main shaft 41 extending from the casing of the pump 40 are connected via a coupling 50. The coupling 50 is a flange for connecting the main shaft 31 and the drive shaft 41, and has an outer peripheral surface 50a substantially parallel to the axis AL and a side surface 50b substantially perpendicular to the axis AL. The coupling 50 is covered by the coupling guard 100. The pump 40 of the present embodiment is a horizontal shaft type pump whose main shaft 41 extends in the horizontal direction. The pump 40 of one embodiment may be a vertical pump having a main shaft extending in the vertical direction.

  FIG. 2A is a perspective view showing the coupling guard 100 according to the embodiment. FIG. 2B is a front view showing the coupling guard 100 according to the embodiment. Note that FIG. 2A also shows the external terminal 80. The coupling guard 100 covers the coupling 50 and the periphery of the coupling 50 so as to prevent humans or foreign matter from contacting the exposed portions of the rotating coupling 50, the main shaft 41 and the drive shaft 31. Specifically, as shown in FIG. 2, the coupling guard 100 includes a guard body 110 and legs 140. The guard main body 110 has an octagonal cross section perpendicular to the axis AL of the drive shaft 31 (main shaft 41) and has a shape extending along the axis AL. Further, the guard body 110 has end face portions 113 at both ends in the axis AL direction, and the end face portions 113 are formed with holes 114 through which the drive shaft 31 or the main shaft 41 is inserted. As shown in FIG. 1, the inner space of the guard body 110 accommodates the coupling 50, one end 31a of the drive shaft 31, and one end 41a of the main shaft 41. The coupling body 50 is entirely covered by the guard body 110. Note that the guard body 110 may have an opening at a portion facing the end surface portion 113 and the ground surface.

The legs 140 support the guard body 110. As shown in FIG. 2, the coupling guard 100 of the present embodiment has four leg portions 140, and each leg portion 140 includes a leg portion main body 141 and a mounting portion 142. The leg portion 140 of the coupling guard 100 according to the embodiment is not limited to this shape. For example, the number of leg portions 140 is not limited to four and may be any number. The leg body 141 has a flat plate shape extending in the vertical direction, and has an upper end continuous with the guard body 110 and a lower end continuous with the mounting portion 142. The mounting portion 142 extends from the lower end of the leg body 141 to the outer side in the horizontal direction (the side opposite to the axis AL). The mounting portion 142 has a hole 143 for fixing the leg portion 140 to the base 60. In FIG. 1, the leg 140 is fixed to the base 60 by the bolt 145 inserted into the hole 143. The bolt 145 allows the coupling guard 100 to be detached from the base 60 when performing maintenance on the sensors 160A and 160B described later. Accordingly, even when the pump 40 cannot be stopped due to factory equipment that is constantly operating, the operator can maintain the sensors 160A and 160B without directly touching the pump 40. In addition, the leg body 141, the guard body 110, and the mounting portion 142 may be configured as separate parts and connected to each other.

  Further, sensors 160A and 160B for detecting the distance to the outer periphery of the coupling 50 are attached to the coupling-side surface of the coupling guard 100. The sensors 160A and 160B are detectors that can detect the distance to the coupling 50 without contact.

  As shown in FIG. 1, the coupling 50 is a flange for connecting the main shaft 41 and the drive shaft 31, and its diameter is larger than those of the main shaft 41 and the drive shaft 31. Further, the pump device 20 is in a "run-around" state in which the shaft center rotates while swinging due to an abnormality such as a defective centering, a shaft deviation, a shaft bending, or a bearing defect. Displacement due to this "whirling" appears more markedly on the outer peripheral surface 50a of the coupling 50 having a larger diameter than the main shaft 41, the drive shaft 31, and their bearings. Therefore, by "observing" the distance from the coupling guard 100 to the outer peripheral surface 50a of the coupling 50, it is possible to quickly find the "whirl" of the main shaft 41 and the drive shaft 31.

  In the present embodiment, each of the sensors 160A and 160B has a sensor main body 162 and a sensor case 170 that is attached to the guard main body 110 and supports the sensor main body 162. However, the sensors 160A and 160B may be configured such that the sensor body 162 is directly attached to the guard body 110. By attaching the sensors 160A and 160B to the coupling-side surface of the coupling guard 100, even when the pump device 20 is installed outdoors, the sensor body 162 can be protected from the external environment such as wind and rain, and the durability is improved. .. Thereby, the vibration can be continuously detected for a long time (for example, several days to several years).

  FIG. 2C is a configuration diagram of the sensor body 162. The sensor body 162 includes a power supply unit 165, a calculation unit 166, an input/output unit 167, a first detection unit 168, and a second detection unit 169.

  The power supply unit 165 supplies electric power to each component (the calculation unit 166, the input/output unit 167, the first detection unit 168, and the second detection unit 169) of the sensor body 162. If the power supply unit 165 is a battery such as a storage battery, wiring from outside the coupling guard 100 can be omitted. Further, the power supply unit 165 may have a power generation unit such as solar power generation, and the power generated by the power generation unit may be supplied to each component of the sensor body 162. The coupling guard 100 is removed during maintenance of the coupling 50. Therefore, the power supply unit 165 provided in the coupling guard 100 is preferably a battery that does not require wiring.

  The arithmetic unit 166 is, for example, a CPU and processes signals based on various programs. Specifically, the arithmetic unit 166 processes the signal input from the input/output unit 167 and stores it in a memory (not shown). In addition, the information stored in the memory is output to the input/output unit 167. The input/output unit 167 performs input/output to share information with external devices and various sensors. Specifically, the input/output unit 167 performs communication and/or inputs/outputs digital signals and analog signals.

The first detection unit 168 is a non-contact coupling 5 such as a laser displacement sensor such as an infrared distance sensor, an optical displacement sensor, a linear proximity sensor such as an eddy current sensor, and an ultrasonic displacement sensor.
Any detector that detects the distance to zero. Since the first detection unit 168 is not in contact with the rotating machine, compared to mounting the sensor directly at a position where the vibration of the bearing or the like is large, the measurement position is stably fixed, and therefore the measurement is performed for a long period of time. You can Further, since the coupling 50 is covered by the coupling guard 100, the influence of external light and dark is small. Therefore, the first detection unit 168 can use an optical displacement sensor.

  The second detector 169 is an arbitrary detector for detecting the absolute vibration of the coupling guard 100, such as a conductive speed sensor or a piezoelectric acceleration sensor. The second detection unit 169 may measure the absolute vibration in the same direction as the first detection unit 168.

  The power supply unit 165, the calculation unit 166, the input/output unit 167, the first detection unit 168, and the second detection unit 169 may be configured by different boards. Further, the power supply unit 165, the calculation unit 166, and the input/output unit 167 may be installed in a device different from the coupling cover 100. The values detected by the first detection unit 168 and the second detection unit 169 are input to the calculation unit 166 via the input/output unit 167.

  FIG. 3 is a cross-sectional view taken along the line XX of FIG. Note that, in FIG. 3, the horizontal direction Hd and the vertical direction Vd are shown together. In this embodiment, two sensors 160A and 160B are attached to the guard body 110. The first detection unit 168 of the sensor (first sensor) 160A can detect the distance V in the vertical direction Vd of the outer peripheral surface 50a of the coupling 50 from the guard body 110, and the first detection unit 168 of the sensor (second sensor) 160B. The first detector 168 is configured to detect the distance H in the horizontal direction Hd of the outer peripheral surface 50a of the coupling 50 from the guard body 110. That is, the sensors 160A and 160B are installed at positions where the angle θ passing through the axis in the normal state is 90°, and detect displacements in directions perpendicular to each other. However, the present invention is not limited to this example, and the sensors 160A and 160B may be configured to detect displacements in directions different from each other by arbitrary angles (for example, θ=60°, θ=180°, etc.). Good. Further, in the example shown in FIGS. 2 and 3, the sensors 160A and 160B are provided at the same position in the axis AL direction. However, it is not limited to such an example, and may be provided at different positions in the axis AL direction. In this case, the sensors 160A and 160B may be arranged to detect displacement in the same direction. Further, the coupling guard 100 is not limited to one having two sensors attached, and only one sensor may be attached, or three or more sensors may be attached.

  When the pump device 20 is normal, the shaft center rotates at substantially the same position, so the distance from the coupling guard 100 to the outer peripheral surface 50a of the coupling 50 is substantially constant. Therefore, the calculation unit 166 may determine that the pump device 20 is abnormal (for example, the shaft touches around) when the detected distances V and H change above or below a predetermined threshold value. In addition, the sensor body 162 has a display unit such as a lamp (not shown), and when the calculation unit 166 determines that the detected distances V and H have become equal to or greater than or equal to a predetermined threshold value, the lamp is turned on to the outside. The pump may be protected and stopped while notifying the abnormality.

  Further, the pump device 20 is a sensor for measuring the displacement in the axial direction (third direction) on the end surface portion 113 facing the side surface 50b of the coupling 50, in addition to or instead of the two sensors 160A and 160B. May be provided. In particular, when a ball bearing or a thrust bearing is used in the pump device 10, these bearings are physically in contact with each other in the axial direction, and therefore the end face 113 has a sensor 160C for measuring the axial displacement. It may be provided (see FIG. 2). The sensor 160C may have the same configuration as the sensors 160A and 160B, or may have a different configuration. Further, the pump device 10 may include a rotation pulse detection unit (not shown) that detects the rotation speed of the coupling 50.

  As shown in FIG. 3, the outer peripheral surface 50a of the coupling 50 facing the sensors 160A and 160B may be provided with the detected portion 52 at a position facing the first detecting portion 168. The sensors 160A and 160B can detect the distances V and H if the first detection unit 168 and the detection target 52 face each other, the coupling 50 is displaced in the axial direction, and the detection target 52 moves to the first detection unit. If it does not face 168, the distances V and H may be undetectable. For example, if the sensors 160A and 160B are displacement sensors that detect the reflection of light that travels straight like infrared rays, the infrared rays can be normally reflected only by the detection section 52, and the infrared rays can be normally reflected by the coupling section 50 other than the detection section 52. Use a configuration that does not allow normal reflection. In this case, by setting the detected portion 52 within a range in which axial displacement is allowed, the abnormal displacement in the axial direction can be detected by the sensors 160A and 160B.

  In addition, the rotational position detection unit 52a is provided on the detected portion 52 or a part of the outer peripheral surface 50a, and the calculation unit 166 uses the signal that the first detection unit 168 has passed through the rotational position detection unit 52a to detect the coupling 50. The rotation speed may be detected. The rotational position detection unit 52a may, for example, provide the detected unit 52 formed on the ring with a portion where the first detection unit 168 cannot detect the distance, or conversely, the first detection unit 168 has an excessive amount. You may provide the part which reacts with. The calculation unit 166 can calculate the vibration displacement based on the distance to the coupling 50 and the rotation speed of the coupling 50.

  As described above, the guard body 110 of the present embodiment has an octagonal cross section, and has the upper surface portion 112a that defines a horizontal plane and the side surface portion 112b that defines a vertical plane. The sensor 160A is attached to the upper surface 112a, and the sensor 160B is attached to the side surface 112b. In other words, the guard body 110 has a flat portion in the area where the sensors 160A and 160B are attached. As described above, the sensors 160A and 160B are attached to the planar upper surface portion 112a and the side surface portion 112b of the guard main body 110, so that the sensors 160A and 160B can be easily installed as compared with the case where the sensor is attached to a curved surface. Can be placed.

  The sensors 160A and 160B may be capable of transmitting the detection signal to the external device of the pump device 20 by wire or wirelessly via the input/output unit 167. As an example of the external device, a general-purpose information terminal such as a PDA (Personal Digital Assistant) or a personal computer may be used, or a dedicated terminal such as a remote monitoring device or a dedicated remote controller may be used to control the pump device 20 and monitor the status. Examples include monitoring equipment. Further, as shown in FIG. 2, the input/output unit 167 of the sensors 160A and 160B may be configured to wirelessly transmit the detection information to the outside such as the external terminal 80. Here, as the wireless transmission, for example, a technique of near field communication (NFC: Near Field Communication) can be used. Also, wireless communication of any method such as Bluetooth (registered trademark) and Wi-Fi can be used. However, NFC is advantageous in that communication can be completed simply by bringing the external terminal 80 closer to the sensors 160A and 160B. As wired communication, for example, an external connection terminal such as a USB (Universal Serial Bus) is provided in the input/output unit 167 of the sensors 160A and 160B, and communication is performed by connecting the external terminal 80 to the external connection terminal. Alternatively, serial communication such as RS422, RS232C, RS485 may be used.

The calculation units 166 of the sensors 160A and 160B store the distances V and H detected by the first detection unit 168 at arbitrary detection timings (for example, several μs to several seconds) as history, and the control device or the external terminal 80 or the like is arbitrary. The stored distances V, H, etc. are acquired as detection information at the information acquisition timing (for example, several seconds to several days or months). As a result, the control device or the external terminal 80 or the like, which has acquired the detailed detection information from the sensors 160A and 160B, records and monitors the displacement, vibration, dynamic trajectory, etc. of the coupling 50, and the pump device 20. Fault diagnosis can be performed. Further, the control device, the external terminal 80, or the like may only display the abnormality of the pump device 20 detected by the calculation unit 166 (for example, touching of the shaft).

  The calculation unit 166 of the sensors 160A and 160B detects the distance V detected by the first detection unit 168 based on the vibration of the guard main body 110 detected by the second detection unit 169 at an arbitrary detection timing (for example, several μs to several seconds). , H should be corrected. When the pump 40 or the motor 30 vibrates, the vibration is transmitted to the guard body 110 via the base 60. Therefore, by correcting the distances V and H using the absolute vibration of the coupling guard 100 detected by the second detection unit 169, the calculation unit 166 can more accurately diagnose the vibration of the coupling 50. In particular, the pump device 20 may be installed on a vibration isolation frame (not shown). In this case, the guard main body 110 may resonate due to the vibration of the vibration isolation frame. Therefore, the vibration of the coupling body 50 can be detected more accurately by detecting the vibration of the guard body 110 with the second detection unit 169.

  Further, in the case where the sensors 160A and 160B can wirelessly transmit the detection signal, it is preferable that the periphery of the sensors 160A and 160B be formed of a material that transmits the wireless signal. For example, the sensor case 170 that houses the sensor body 162 may be formed of a material such as a resin that transmits a wireless signal. Further, it is preferable that the entire guard body 110, or at least the regions 112a1 and 112b1 in the guard body 110 that are in contact with the sensors 160A and 160B be formed of a material such as a resin that allows wireless communication to pass through. This allows good wireless communication by the sensors 160A and 160B. Further, if the entire coupling guard 100 is made of resin, vibration transmitted from the base 60 to the guard main body 110 can be suppressed and the distances V and H can be detected more accurately as compared with the case where an iron plate is formed by pressing. can do.

  As described above, in the pump device 20 according to the present embodiment, the displacement of the coupling 50 can be detected by the sensors 160A, 160B, 160C attached to the coupling guard 100 when the coupling 50 rotates. By attaching at least one of the sensors 160A, 160B, and 160C to the guard body 110, vibration can be continuously detected for a long period (for example, several days to several years). When there is a new request for vibration measurement with the existing pump device, the worker may add or replace the coupling guard 100 to the existing pump device. This allows the vibrometer to be installed without touching the pump even at a site where the pump cannot be stopped.

(Modification)
In the above-described embodiment, the sensors 160A and 160B are attached to the upper surface portion 112a and the side surface portion 112b inside the guard body 110. However, the present invention is not limited to such an example, and as shown in FIG. 4, the sensors 160A and 160B may be provided on the inclined surface portion 112c that connects the upper surface portion 112a and the side surface portion 112b. Further, as shown in FIG. 4, the sensors 160A and 160B may be attached by penetrating the guard body 110. As a result, with the coupling guard 100 attached to the base 60, the maintenance of the sensors 160A and 160B can be performed without the operator touching the rotating portion. Further, the present invention is not limited to the case where the two sensors 160A and 160B are provided, and for example, four sensors may be attached to each of the upper surface portion 112a, the two side surface portions 112b, and the lower surface portion 112d.

In the above-described embodiment, the guard body 110 has an octagonal cross section perpendicular to the axis AL. However, the present invention is not limited to such an example, and the cross section of the guard body 110 perpendicular to the axis line AL may be an arbitrary polygonal shape such as a square shape. As a result, as shown in FIGS. 1 to 3, the region 112 to which the sensors 160A and 160B are attached is formed into a flat surface (horizontal surface, vertical surface). Further, as shown in the coupling guard 100A of the modified example of FIG. 5, the guard body 110A may have a substantially cylindrical shape. Also in this case, in the guard body 110A, it is preferable that the region 112 to which the sensors 160A and 160B are attached is configured to be a flat surface (horizontal surface, vertical surface), but the invention is not limited to such an example.

  Further, in the above-described embodiment, the guard body 110 of the coupling guard 100 covers the entire circumference of the coupling 50, but the present invention is not limited to this example. For example, as shown in the coupling guard 100B of the modified example of FIG. 6, it may have a cross-sectional shape with an opening at the bottom and cover the coupling 50 together with the base 60. In such a case, the coupling guard 100B may be provided with sensors 160A and 160B so that the displacement of the coupling 50 can be detected in a non-contact manner.

  As shown in FIG. 6, when the coupling guard 100B is attached to the base 60, the coupling guard 100B preferably has a vibration isolator 144 at the attachment portion 142B with which the base 60 is attached. Specifically, the coupling guard 100B is installed on the base 60 via a vibration isolator. By attaching the guard body 110B of the coupling guard 100B to the base 60 via the vibration isolator 144, it is possible to suppress the vibration from the base 60 from acting on the guard body 110B. As a result, it is possible to prevent the detection information from the sensors 160A, 160B, and 160C from including the vibration of the coupling guard 100B itself, and improve the detection accuracy of the displacement of the coupling 50. By providing such a vibration isolator 144 on the mounting portion 142 of the leg portion 140 shown in FIG. 2, the same effect can be achieved with the coupling guard 100 shown in FIG.

  Further, the coupling guards 100, 100A, 100B in the embodiment or the modification may have various reinforcing mechanisms such as ribs. As an example, the coupling guard 100C of the modified example shown in FIG. 7 is configured such that the portion closer to the ground contact surface, that is, the portion closer to the base 60 is thicker, and the portion further away from the base 60 is thinner. With such a configuration, the rigidity of the coupling guard 100 can be increased and the vibration of the coupling guard 100 itself can be suppressed. Therefore, the accuracy of detecting the displacement of the coupling 50 by the sensors 160A, 160B, 160C can be improved. Can be improved.

  In the above-described embodiment, the coupling guard 100 is supported by the base 60 that supports the pump 40 and the motor 30. However, the coupling guard 100D is not limited to such an example, and the coupling guard 100D may be supported by at least one of the pump 40 and the motor 30, for example, like the coupling guard 100D of the modified example shown in FIG. In the example shown in FIG. 8, the end surface portion 113 of the coupling guard 100D is attached to both the pump 40 and the motor 30. In such a case, the coupling guard 100D may have the vibration isolator 144Da at the attachment portion with the pump 40, or may have the vibration isolator 144Db at the attachment portion with the motor 30. By doing so, it is possible to suppress the transmission of the vibration from the pump 40 or the motor 30 to the coupling guard 100D, and it is possible to improve the detection accuracy of the displacement of the coupling 50 by the sensors 160A and 160B.

(Embodiment 2)
FIG. 9 is a schematic configuration diagram showing an example of the pump device according to the second embodiment. Note that, in FIG. 9, the same configurations as those in FIG. 1 are denoted by the same reference numerals, and overlapping description will be omitted. In the example shown in FIG. 9, a control device 22 including a calculation unit 26 including, for example, a CPU and an input/output unit 27 including a port or a communication unit is shown. Each of the sensor 160A, the sensor 160B, and 160C provided in the coupling guard 100 includes first and second detection units 168 and 169, and the detection values thereof are wired or wireless and the input/output unit 27 of the control device 22. Entered in. The calculation unit 26 functions similarly to the above-described calculation unit 166, and further, when the vibration of the coupling 50 is calculated using the detection values of the plurality of sensors 160A, 160B, 160C and/or the rotation speed of the coupling 50. Good. In this way, by inputting the detection values of the plurality of sensors 160A and 160B to the single control device 22, the control device 22 simultaneously measures the displacements in multiple directions, and the displacements in the multiple directions and the rotational speeds are mutually measured. The vibration displacement can be calculated based on the relationship, and the vibration velocity and the vibration acceleration can be calculated based on the vibration displacement. At that time, the rotation speed of the coupling 50 may be measured, or a preset value or a command value by a pump control device (not shown) may be used. For example, the control device 22 calculates the vibration velocity and the vibration acceleration based on the vibration displacement detected by the first detection unit 168 and the second detection unit 169, and performs the frequency analysis (FFT) of the vibration to obtain the analysis result. The abnormal vibration may be determined based on the above.

  In the first embodiment described above, the sensor 160A and the sensors 160B and 160C may share the distances V and H by communication or the like. In that case, instead of the control device 22, the sensor 160A or/and the sensor 160B may calculate the vibration displacement, the vibration speed, and the vibration acceleration. Further, the sensor 160A or/and the sensor 160B may perform frequency analysis (FFT) of the vibration and determine the abnormal vibration based on the analysis result.

The present embodiment described above can be described as the following forms.
[Mode 1] According to mode 1, a coupling guard for covering a coupling connecting a drive shaft of a prime mover and a main shaft of a rotating machine is proposed, and the coupling guard has a distance from the coupling to It is characterized in that at least one sensor having a first detection unit that can detect by contact is provided. According to the first aspect, the vibration sensor of the coupling guard can continuously detect the vibration of the rotary machine for a long time.

[Mode 2] According to mode 2, in the coupling guard of mode 1, the sensor is attached to a surface on the coupling side. According to the mode 2, the sensor can be protected from the external environment and the durability is improved.

[Mode 3] According to mode 3, in the coupling guard of mode 1, the sensor is attached to the coupling guard by penetrating an outer surface of the coupling guard and a surface on the coupling side. There is. According to the third aspect, an operator can perform maintenance and the like of the first detection unit from the outside of the coupling guard.

[Mode 4] According to mode 4, in the coupling guards of modes 1 to 3, the sensor is a first sensor for detecting a distance to the coupling in the first direction, and is perpendicular to the first direction. At least one of a second sensor for detecting a distance in the second direction and a third sensor for detecting a displacement in a third direction which is an axial direction of the main shaft.

[Mode 5] According to Mode 5, in the coupling guards of Modes 1 to 4, a region of the coupling guard to which the sensor is attached is configured to be a flat surface.

[Mode 6] According to mode 6, in the coupling guard of mode 5, the cross section of the coupling guard perpendicular to the axial direction of the drive shaft is polygonal.

[Mode 7] According to mode 7, in the coupling guards of modes 1 to 6, the coupling guard is attached to a base portion on which at least one of the prime mover and the rotary machine is installed via a vibration isolator. ..

[Mode 8] According to mode 8, in the coupling guards of modes 1 to 7, the coupling guard is attached to at least one of the prime mover and the rotary machine via a vibration isolator.

[Mode 9] According to Mode 9, in the coupling guards of Modes 1 to 8, the coupling guard is configured such that the portion closer to the ground plane is thicker and the farther away from the installation surface is thinner. There is. With such a configuration, the rigidity of the coupling guard can be increased and the vibration of the coupling guard itself can be suppressed, so that the displacement detection accuracy of the sensor can be improved.

[Mode 10] According to mode 10, in the coupling guards of modes 1 to 9, the sensor is configured to be capable of wirelessly transmitting detection information to the outside.

[Mode 11] According to mode 11, in the coupling guards of modes 1 to 10, the sensor is powered by a battery. According to the eleventh aspect, the wiring can be simplified.

[Mode 12] According to Mode 12, in the coupling guards of Modes 1 to 11, the sensor further includes a second detector for detecting vibration of the coupling guard.

[Mode 13] According to Mode 13, a rotary machine device is proposed, and the rotary machine device includes a prime mover, a rotary machine, a coupling connecting a drive shaft of the prime mover and a main shaft of the rotary machine, and Coupling guards of forms 1 to 12 covering the coupling.

[Mode 14] According to mode 14, in the rotary machine device of mode 13, the coupling has a detected portion corresponding to the detection by the first detection portion.

[Mode 15] According to Mode 15, in the rotary machine device of Mode 13 or 14, the coupling has a rotational position detection unit corresponding to the detection by the first detection unit.

[Mode 16] According to mode 16, in the rotary machine device of modes 13 to 15, the rotary machine is a pump.

[Mode 17] According to mode 17, the rotary machine according to modes 13 to 16 includes an arithmetic unit that calculates the vibration of the coupling based on the detection value of the first detection unit.

  Although the embodiments of the present invention have been described above, the above-described embodiments of the present invention are intended to facilitate understanding of the present invention and do not limit the present invention. The present invention can be modified and improved without departing from the spirit of the invention, and it goes without saying that the present invention includes equivalents thereof. Further, in the range in which at least a part of the problems described above can be solved, or in the range in which at least a part of the effect is achieved, any combination of the embodiment and the modified examples is possible, and is described in the claims and the specification. It is possible to arbitrarily combine or omit the respective constituent elements.

20... Pump device 30... Motor 31... Drive shaft 40... Pump 41... Rotating shaft 50... Coupling 52... Detected part 60... Base 80... External terminal 100, 100A-100D... Coupling guard 110, 110A, 110B... Guard Main body 140...Legs 142...Mounting part 144...Vibration isolator 160A...Sensor (first sensor)
160B... Sensor (second sensor)
160C... Sensor (third sensor)
162... Sensor main body 165... Power supply section 166... Calculation section 167... Input/output section 168... First detection section 169... Second detection section 170... Sensor case 112a... Top surface section 112b... Side surface section 112c... Slope section 112d... Bottom surface section AL … Axis Hd… Horizontal Vd… Vertical

Claims (17)

A coupling guard for covering the coupling connecting the drive shaft of the prime mover and the main shaft of the rotating machine,
The coupling guard is
A coupling guard, comprising at least one sensor having a first detection unit capable of detecting a distance to the coupling in a non-contact manner.   The coupling guard according to claim 1, wherein the sensor is attached to a surface of the coupling guard on the coupling side.   The coupling guard according to claim 1, wherein the sensor is attached to the coupling guard so as to pass through an outer surface of the coupling guard and a surface on the coupling side.   The sensor is a first sensor for detecting a distance in a first direction to an outer peripheral surface of the coupling, a second sensor for detecting a distance in a second direction perpendicular to the first direction, and the spindle. The coupling guard according to any one of claims 1 to 3, which is at least one of a third sensor for detecting a displacement in a third direction which is the axial direction of the coupling guard.   The coupling guard according to any one of claims 1 to 4, wherein a region of the coupling guard to which the sensor is attached is configured to be a flat surface.   The coupling guard according to claim 5, wherein the coupling guard has a polygonal cross section perpendicular to the axial direction of the drive shaft. The coupling guard is attached to a base portion on which at least one of the prime mover and the rotary machine is installed via a vibration isolator.
The coupling guard according to any one of claims 1 to 6. The coupling guard is attached to at least one of the prime mover and the rotating machine via a vibration isolator,
The coupling guard according to any one of claims 1 to 7.   The coupling guard according to any one of claims 1 to 8, wherein the coupling guard is thicker in a portion closer to the installation surface and thinner in a portion further away from the ground contact surface. The sensor is configured to wirelessly transmit detection information to the outside,
The coupling guard according to any one of claims 1 to 9.   The coupling guard according to claim 1, wherein the sensor is powered by a battery.   The coupling guard according to any one of claims 1 to 11, wherein the sensor further includes a second detection unit for detecting vibration of the coupling guard. A prime mover,
A rotating machine,
A coupling that connects the drive shaft of the prime mover and the main shaft of the rotating machine;
The coupling guard according to claim 1, which covers the coupling,
A rotating machine device.   The rotary machine device according to claim 13, wherein the coupling has a detected portion corresponding to the detection by the first detection portion.   15. The rotary machine device according to claim 13, wherein the coupling has a rotational position detection unit corresponding to the detection by the first detection unit.   The rotary machine device according to any one of claims 13 to 15, wherein the rotary machine is a pump.   The rotary machine device according to any one of claims 13 to 16, further comprising a calculation unit that calculates a vibration of the coupling based on a detection value of the first detection unit.

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