Rotating equipment diagnostic device

Abstract

To provide a rotating equipment diagnostic device that can reliably charge secondary batteries without contact without removing them and can continuously and stably diagnose the condition of rotating parts.SOLUTION: A rotating equipment diagnostic device 1 includes a diagnostic unit 10 attached to rotating equipment, and a separate power transmission unit 40. The diagnostic unit 10 includes a first case 3, a sensor, a secondary battery 25 that supplies power to the sensor, a receiving coil 30 that is electrically connected to the secondary battery 25, and a receiving side core 31 to which the receiving coil 30 is attached. The power transmission unit 40 includes: a second case 43; a power transmission coil 50 that is arranged within the case 43 and is arranged in a non-contact state with the receiving coil 30 via the first case 3 and the second case 43, and transmits power to the receiving coil 30 by electromagnetic induction; and a power transmission side core 51 to which the power transmission coil 50 is attached.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a diagnostic device for a rotating device that diagnoses the state of the rotating device. [Background technology]

[0002] Various devices have been developed to diagnose the condition of the rotating parts of rotating equipment installed in a plant. For example, Patent Document 1 listed below describes a rotating equipment monitoring device that includes one or more slave units installed near each of one or more rotating equipment, and a master unit to which data from the one or more slave units is distributed, the slave units including a vibration sensor, a temperature sensor, and a data distribution means, and the master unit including a data receiving means, a recording means, and a monitoring means.

[0003] Furthermore, paragraph 0026 of Patent Document 1 states that the battery used as the power source for the handset may be a dry cell battery that can be replaced when the life of the installed battery has expired, or a rechargeable battery that can be recharged when the life of the installed battery has expired. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6644221 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-described device, when replacing the battery that powers the slave unit, the cover or lid must be removed from the slave unit body, and then the battery or rechargeable battery inside the slave unit body must be replaced. This changes the relationship between the slave unit and the sensor, such as how well they are attached, and this can cause the data detected by the sensor before and after the battery replacement to differ from each other, making monitoring of the rotating equipment unstable.

[0006] Therefore, an object of the present invention is to provide a diagnostic device for rotating equipment that can reliably charge a secondary battery without contact without removing it, and that can continuously and stably diagnose the condition of the rotating part. [Means for solving the problem]

[0007] In order to achieve the above object, a diagnostic device for a rotating device according to the present invention is disposed in a rotating part of a rotating device installed in a plant or factory and diagnoses the condition of the rotating part, and comprises a diagnostic unit attached to the rotating device and a power transmission unit separate from the diagnostic unit, wherein the diagnostic unit has a first case, a sensor disposed in the first case for acquiring information from the rotating part and detecting the condition of the rotating part, a secondary battery disposed in the first case for supplying power to the sensor, a receiving coil disposed in the first case and conducting to the secondary battery, and a receiving side core disposed in the first case and to which the receiving coil is attached, and the power transmission unit has a second case, a transmitting coil disposed in the second case and disposed in a non-contact state with the receiving coil via the first case and the second case, transmitting power to the receiving coil by electromagnetic induction, and a transmitting side core to which the transmitting coil is attached.

[0008] According to the above invention, by arranging the transmission coil of the power transmission unit, to which an AC voltage is applied, in a non-contact state with the receiving coil via the first case and the second case, the magnetic flux generated in the transmission coil is induced in the receiving coil, and power is transmitted from the transmission coil to the receiving coil by electromagnetic induction.This means that the secondary battery can be reliably charged in a non-contact manner without applying external force to the sensor, secondary battery, etc., and since the detection information from the sensor does not change before and after charging the secondary battery, the condition of the rotating part can be continuously and stably diagnosed.

[0009] In the rotating equipment diagnostic device of the present invention, the receiving side core and the transmitting side core may be configured as if a single core has been divided, and when the transmitting coil is placed in a non-contact state on the receiving coil, at least one end of the receiving side core and one end of the transmitting side core may face each other via the first case and the second case to form a single core.

[0010] It has been known that if metal is present between the charging coil and the transmitting coil, the magnetic flux from the transmitting coil is less likely to be induced toward the charging coil, making it difficult to transmit power to the charging coil through electromagnetic induction and making it difficult to charge the secondary battery.

[0011] In contrast, according to the above-described aspect, the receiving side core and the transmitting side core are configured as if a single core has been divided, and when the transmitting coil is placed in a non-contact state on the receiving coil, at least one end of the receiving side core and one end of the transmitting side core face each other via the first case and the second case to form a single core. This makes it possible to minimize misalignment between the ends of the two cores, and as a result, even if the first case and / or the second case is made of metal, magnetic flux from one end of the transmitting side core is more easily guided to one end of the receiving side core, thereby enabling the secondary battery to be reliably charged.

[0012] In the diagnostic device for a rotating machine according to the present invention, the receiving coil may have opposite ends that respectively abut against the inner surface of the first case, with the receiving coil attached between the opposite ends, the transmitting core may have opposite ends that respectively abut against the inner surface of the second case, with the receiving coil attached between the opposite ends, and when the transmitting coil is placed in a non-contact state on the receiving coil, the opposite ends of the receiving core and the opposite ends of the transmitting core may face each other via the first case and the second case, forming a ring-shaped transformer.

[0013] According to the above aspect, when the transmitting coil is placed in a non-contact state on the receiving coil, both ends of the receiving side core and both ends of the transmitting side core face each other via the first case and the second case, and the receiving side core and the transmitting side core form a ring-shaped transformer shape, so that misalignment between the both ends of the two cores can be minimized.As a result, magnetic flux from both ends of the transmitting coil is induced to both ends of the receiving coil, and power can be transmitted from the transmitting coil to the receiving coil efficiently and without waste.

[0014] In the rotating equipment diagnostic device according to the present invention, the first case and the second case may be provided with a positioning portion that enables alignment so that the power transmitting coil and the power receiving coil are disposed opposite each other.

[0015] According to the above aspect, since a positioning unit having the above configuration is provided, it is possible to prevent the transmission coil from shifting position relative to the receiving coil during power transmission from the transmission coil to the receiving coil (which can also be said to be during charging), and the secondary battery can be charged more reliably.

[0016] In the rotating equipment diagnostic device according to the present invention, the inside of the first case and / or the second case may be filled with resin, and at least one selected from the sensor, the secondary battery, the receiving coil, the receiving side core, the transmitting coil, and the transmitting side core may be covered with the resin to provide an explosion-proof specification.

[0017] According to the above aspect, the sensor, secondary battery, receiving coil, and receiving side core arranged in the first case, and the transmitting coil and transmitting side core arranged in the second case are explosion-proof and covered with resin, making them suitable for use in diagnosing rotating equipment installed in a plant or factory.

[0018] In the diagnostic device for a rotating machine according to the present invention, the first case and the second case may be provided with a guide portion that guides the power transmission unit when it is brought close to the power receiving coil so that the power transmission coil is positioned in a non-contact state with respect to the power receiving coil.

[0019] According to the above aspect, since a guide portion having the above configuration is provided, the power transmission unit can be smoothly positioned close to the power receiving coil while being guided thereto, thereby improving the workability of positioning the power transmission unit relative to the power receiving coil.

[0020] In the diagnostic device for a rotating device according to the present invention, the positioning portion may be configured to include a recess and a protrusion that fits into the recess.

[0021] According to the above aspect, the positioning portion has a recessed and protruding fitting structure, which more reliably prevents the power transmission coil from shifting position relative to the power receiving coil while transmitting power from the power transmission coil to the power receiving coil.

[0022] In the diagnostic device for a rotating device according to the present invention, the first case or the second case may be provided with a lid that opens and closes the recess.

[0023] According to the above aspect, the first case or the second case is provided with a lid portion that opens and closes the recess. By closing the lid portion over the recess so that the lid covers the opening of the recess, foreign matter such as dust, dirt, sand, etc. can be prevented from entering the recess, and the recess and protrusion of the recess can be reliably fitted into the recess. [Effects of the Invention]

[0024] In the present invention, the transmission coil of the power transmission unit to which an AC voltage is applied is arranged in a non-contact state on the receiving coil via the first case and the second case, so that the magnetic flux generated in the transmission coil is induced in the receiving coil, and power is transmitted from the transmission coil to the receiving coil by electromagnetic induction.This means that the secondary battery can be reliably charged in a non-contact manner without applying external force to the sensor, battery, etc., and since the detection information from the sensor does not change before and after charging the secondary battery, the condition of the rotating part can be continuously and stably diagnosed. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a schematic configuration diagram showing a first embodiment of a diagnostic device for a rotating machine according to the present invention; [Figure 2] FIG. 2 is an explanatory diagram showing the diagnostic device in use. [Figure 3] FIG. 4 is a schematic configuration diagram showing a second embodiment of a diagnostic device for a rotating machine according to the present invention. [Figure 4] FIG. 10 is a schematic perspective view showing a third embodiment of a diagnostic device for a rotating machine according to the present invention. [Figure 5] FIG. 10 is a schematic perspective view showing a fourth embodiment of a diagnostic device for a rotating machine according to the present invention. [Figure 6] FIG. 10 is a schematic configuration diagram showing a fifth embodiment of a diagnostic device for a rotating machine according to the present invention. [Figure 7] FIG. 10 is a schematic configuration diagram showing a sixth embodiment of a diagnostic device for a rotating machine according to the present invention. [Figure 8] FIG. 13 is a schematic diagram of the sixth embodiment as viewed from a plan view. [Figure 9] FIG. 10 is a schematic configuration diagram showing a seventh embodiment of a diagnostic device for a rotating machine according to the present invention. [Figure 10A] 10 is a graph showing test results when an AC voltage of 30 Hz is applied to the primary side in a charging test of a diagnostic device for rotating machinery. [Figure 10B] 10 is a graph showing test results when an AC voltage of 100 Hz is applied to the primary side in a charging test of a diagnostic device for rotating machinery. DETAILED DESCRIPTION OF THE INVENTION

[0026] (First embodiment of diagnostic device for rotating equipment) A first embodiment of a diagnostic device for rotating equipment according to the present invention will be described below with reference to Figures 1 and 2. A diagnostic device 1 for rotating equipment according to the present invention (hereinafter also simply referred to as "diagnostic device 1") is arranged in a rotating part (a part related to rotational operation, such as a shaft part in a rotor of a motor or an impeller of a pump, and a bearing that rotatably supports the shaft part) of rotating equipment such as a motor, turbine, speed reducer, pump, agitator, or blower installed in a plant or factory, and diagnoses the condition of the rotating part.

[0027] As shown in FIG. 1, the diagnostic device 1 includes a diagnostic unit 10 attached to a rotating machine (not shown), and a power transmission unit 40 separate from the diagnostic unit 10.

[0028] The diagnostic unit 10 also includes a first case 3 made of a metal such as a stainless steel alloy, a circuit board 20 disposed within the first case 3 and on which sensors (various sensors such as a vibration sensor, illuminance sensor, acceleration sensor, atmospheric pressure sensor, geomagnetic sensor, temperature and humidity sensor, etc.) that acquire information such as vibration data from the rotating unit 2 and detect the state of the rotating unit 2, a microcomputer, a communication module, etc. are mounted, a secondary battery 25 disposed within the first case 3 and supplies power to at least the sensors, a power receiving coil 30 disposed within the first case 3 and conducting to the secondary battery 25, and a power receiving core 31 disposed within the first case 3 and on which the power receiving coil 30 is attached. The power receiving coil may be mounted on the circuit board.

[0029] On the other hand, the power transmission unit 40 includes a second case 43, a power transmission coil 50 that is arranged within this case 43 and is arranged in a non-contact state with respect to the power receiving coil 30 via the first case 3 and the second case 43, and transmits power to the power receiving coil 30 by electromagnetic induction, and a power transmission side core 51 to which the power transmission coil 50 is attached.

[0030] In addition, in this embodiment, the receiving side core 31 and the transmitting side core 51 are configured as if a single core has been divided, and when the transmitting coil 50 is placed in a non-contact state on the receiving coil 30, at least one end of the receiving side core 31 and one end of the transmitting side core 51 face each other via the first case 3 and the second case 43, and are configured to form a single core as a whole, sandwiched between the first case 3 and the second case 43 (see Figure 2).

[0031] Next, the configuration of the diagnostic unit 10 will be described in detail.

[0032] The power receiving side core 31 (power receiving side iron core) is roughly U-shaped and includes a pair of side portions 32, 32 arranged parallel to each other and an intermediate portion 33 connecting the base ends of the pair of side portions 32, 32.

[0033] Furthermore, a receiving coil 30 formed by winding a conductor is attached to the outer periphery of the intermediate portion 33 of the receiving core 31 via an insulator 35. Furthermore, the receiving coil 30 is electrically connected to a chargeable secondary battery 25 via a charging control circuit and conductors (not shown), thereby providing electrical continuity between the receiving coil 30 and the secondary battery 25. The charging control circuit is located downstream of a DC conversion circuit that converts the AC current transmitted from the transmitting coil 50 side into DC current, and monitors the voltage of the secondary battery to prevent overcharging.

[0034] In addition, the receiving side core 31 is arranged to be positioned at a predetermined location within the first case 3 of the diagnostic unit 10 with the tip ends 32a, 32a of a pair of side portions 32, 32 abutting the inner surface of the coil arrangement portion 3a in the first case 3.

[0035] In addition, it is preferable to have a fixing means between the first case 3 and the receiving side core 31 for fixing both side portions 32, 32 or both end portions 32a, 32a of the receiving side core 31 to predetermined positions relative to the coil arrangement portion 3a.

[0036] 1, the internal space of the first case 3 is filled with resin M, and the circuit board 20 including the sensor, secondary battery 25, power receiving coil 30, and power receiving side core 31 are embedded in the synthetic resin. In other words, the circuit board 20, secondary battery 25, power receiving coil 30, and power receiving side core 31 are covered with resin M, making it a so-called explosion-proof specification. However, the first case 3 may not be filled with resin M, and the circuit board 20 and the like may be made non-explosion-proof. Alternatively, the circuit board 20 on which the sensor is mounted, secondary battery 25, power receiving coil 30, and power receiving side core 31 may only be partially covered with resin M.

[0037] Next, the configuration of the power transmission unit 40 will be described in detail.

[0038] The power transmitting side core 51 (power transmitting coil side iron core) basically has the same shape and structure as the power receiving side core 31. The power transmitting side core 51 is roughly U-shaped and includes a pair of side portions 52, 52 arranged parallel to each other and an intermediate portion 53 connecting the base ends of the pair of side portions 52, 52. In other words, the power transmitting side core 51 and the power receiving side core 31 in this embodiment have a so-called half-split structure, in which a single core is divided into two halves with the same shape and dimensions.

[0039] Furthermore, it is preferable that the power transmitting core and the power receiving core have the same thickness (outer diameter, outer dimensions), but the dimensions other than the thickness of the power transmitting core and the power receiving core may not be the same.

[0040] Furthermore, a power transmission coil 50 formed by winding a conductor is attached to the outer periphery of the intermediate portion 53 of the power transmission side core 51 via an insulator 55. Furthermore, the power transmission coil 50 is connected via a conductor to a supply means (external power source or the like) (not shown) that supplies alternating current electricity or the like.

[0041] The power transmission side core 51 is arranged at a predetermined position within the case 43 with the tip portions 52a, 52a of the pair of side portions 52, 52 abutting against the inner surface of the coil arrangement portion 43a of the case 43.

[0042] In addition, it is preferable to have a fixing means between the case 43 and the power transmission side core 51 for fixing both side portions 52, 52 or both end portions 52a, 52a of the power transmission side core 51 to predetermined positions relative to the coil arrangement portion 43a.

[0043] In addition, in this embodiment, the cores 31, 51 on which each coil 30, 50 is attached are approximately C-shaped, but these cores may also be, for example, approximately U-shaped or rod-shaped extending in a straight line.

[0044] As with the first case 3, the inside of the second case 43 may be filled with resin, and the power transmission coil 50 and the power transmission side core 51 may be partially or entirely covered with resin to provide an explosion-proof design.

[0045] Furthermore, instead of a configuration in which electricity is supplied to the power transmission coil from an external power source, the power transmission unit may also be configured to incorporate a battery (e.g., a mobile battery) that supplies electricity to the power transmission coil, similar to the diagnostic unit. In this case, the current supplied to the power transmission coil is alternating current, and the battery on the power transmission unit side can be charged and replaced outside the area of ​​the plant where the rotating equipment is installed. With such a configuration, the power transmission unit does not require a cable for connection to an external power source, etc., and therefore, compared to when a cable is provided in the power transmission unit, it is possible to prevent the cable from becoming entangled in the rotating part of the rotating equipment.

[0046] In this diagnostic device 1, when the transmitting coil 50 is placed in a non-contact state on the receiving coil 30 via the first case 3 and the second case 43, as shown in Figure 2, the two end portions 32a, 32a of the receiving side core 31 and the two end portions 52a, 52a of the transmitting side core 51 face each other via the first case 3 and the second case 43, and the receiving side core 31 and the transmitting side core 51 form a ring-shaped transformer.

[0047] That is, as shown in Figure 2, one tip 32a of the receiving side core 31 and one tip 52a of the transmitting side core 51 corresponding to the tip 32a face each other via the coil arrangement section 3a of the first case 3 of the diagnostic unit 10 and the coil arrangement section 43a of the case 43 of the power transmitting unit 40, and the other tip 32a of the receiving side core 31 and the other tip 52a of the transmitting side core 51 corresponding to the tip 32a are arranged facing each other via the coil arrangement section 3a of the first case 3 of the diagnostic unit 10 and the coil arrangement section 43a of the second case 43 of the power transmitting unit 40.

[0048] As a result, the tip ends 32a, 52a of one of the cores 31, 51 and the tip ends 32a, 52a of the other cores 31, 51 form a continuous ring shape (which can also be said to be a ring including the coil arrangement portion 3a of the first case 3 and the coil arrangement portion 43a of the case 43) sandwiched between them, forming a transformer shape.

[0049] In the above state, the two end portions 32a, 32a of the receiving side core 31 and the two end portions 52a, 52a of the transmitting side core 51 are aligned in the vertical direction in Figure 2 with respect to the coil arrangement portion 3a of the first case 3 and the coil arrangement portion 43a of the case 43, and are also aligned in the depth direction in the figure, although this is not shown.

[0050] In addition, the receiving coil 30 and the transmitting coil 50 are aligned in the vertical direction in Figure 2, and also aligned in the depth direction in the figure (although not shown), and are arranged in opposing positions across the coil arrangement section 3a of the first case 3 and the coil arrangement section 43a of the second case 43.

[0051] As described above, in this diagnostic device 1, when the transmitting coil 50 is placed in a non-contact state on the receiving coil 30 via the first case 3 and the second case 43, it is preferable that the receiving coil 30 and the transmitting coil 50 are placed opposite each other with the first case 3 and the case 43 in between.

[0052] (Action and effect) In this diagnostic device 1, when charging the secondary battery 25, the power transmission unit 40 is brought close to the power receiving coil 30, and the power transmission coil 50 is placed in a non-contact state with the power receiving coil 30 via the first case 3 of the diagnostic unit 10 and the second case 43 of the power transmission unit 40.

[0053] That is, the two end portions 52a, 52a of the power transmitting side core 51 are arranged opposite the two end portions 32a, 32a of the power receiving side core 31 via the coil arrangement portion 3a of the first case 3 and the coil arrangement portion 43a of the second case 43.

[0054] Then, AC power from a supply means (not shown) flows to the transmission coil 50, generating a magnetic flux in the transmission coil 50. This magnetic flux is then induced in the receiving coil 30, and power is transmitted from the receiving coil 30 to the receiving coil 30 by electromagnetic induction, thereby charging the secondary battery 25.

[0055] As described above, in this diagnostic device 1, by arranging the power transmitting coil 50 of the power transmitting unit 40 in a non-contact state with the power receiving coil 30 via the first case 3 and the second case 43, power is transmitted from the power transmitting coil 50 to the power receiving coil 30 by electromagnetic induction, so that even if a sensor, battery, etc. installed in a rotating device is covered with a cover or lid, there is no need to remove such a cover or lid or to replace the battery itself, and no external force is applied to the sensor, battery, etc. Furthermore, the detection information from the sensor does not change before and after charging the secondary battery 25.

[0056] As described above, this diagnostic device 1 can reliably charge the secondary battery 25 in a non-contact manner without applying external force to the sensor, the substrate 20 including the sensor, the secondary battery 25, etc., and since the detection information from the sensor does not change before and after charging the secondary battery 25, the condition of the rotating part of the rotating device can be continuously and stably diagnosed.

[0057] In addition, in this embodiment, the receiving side core 31 and the transmitting side core 51 are configured as if a single core has been divided, and when the transmitting coil 50 is placed in a non-contact state on the receiving coil 30, at least one end of the receiving side core 31 and one end of the transmitting side core 51 face each other via the first case 3 and the second case 43, forming a single core (see Figure 2).

[0058] According to the above aspect, the power receiving side core 31 and the power transmitting side core 51 are configured as described above, and the two cores 31, 51 are configured to form a single core, which minimizes misalignment between the one end portions of the two cores 31, 51. As a result, even if the first case 3 or the second case 43 is made of metal, or even if the first case 3 and the second case 43 are both made of metal, magnetic flux from the one end portion of the power transmitting side core 51 is more likely to be guided to the one end portion of the power receiving side core 31, so that the secondary battery 25 can be reliably charged.

[0059] In addition, in this embodiment, when the transmitting coil 50 is placed in a non-contact state on the receiving coil 30 via the first case 3 and the second case 43, the two end portions 32a, 32a of the receiving side core 31 and the two end portions 52a, 52a of the transmitting side core 51 face each other via the first case 3 and the second case 43, and the receiving side core 31 and the transmitting side core 51 form a ring-shaped transformer shape.

[0060] According to the above embodiment, power can be transmitted from the power transmitting coil 50 to the power receiving coil 30 efficiently without waste.

[0061] Furthermore, in this embodiment, the inside of the first case 3 is filled with resin M, and the substrate 20 including the sensor, etc., the secondary battery 25, the receiving coil 30, and the receiving side core 31 are covered with resin M to provide an explosion-proof specification.

[0062] According to the above embodiment, the substrate 20 including sensors etc. arranged inside the first case 3, the secondary battery 25, the receiving coil 30, and the receiving side core 31 are explosion-proof and covered with resin M, so that the device can be suitably used for diagnosing rotating equipment installed in a plant or factory.

[0063] In other words, in explosion-proof areas of plants and factories, electrical and electronic circuits with large amounts of energy are exposed and must be prevented from coming into contact with flammable (combustible) gases, but since electrical and electronic circuits, including the batteries of diagnostic devices, usually store more than a certain amount of energy, it was impossible to replace the batteries in an explosion-proof area without removing the diagnostic device from the rotating equipment.As a result, it was necessary to remove the diagnostic device from the rotating equipment and replace the diagnostic device's batteries in a non-explosion-proof area, which could change the way the diagnostic device is attached to the rotating equipment and change the information detected by sensors, such as vibration data.

[0064] In contrast to this, in this embodiment, as described above, the resin M filled in the first case 3 makes the sensor, secondary battery 25, etc. explosion-proof, and prevents the sensor, secondary battery 25, etc. from coming into contact with flammable gas while maintaining their airtightness. As a result, in an explosion-proof area, the secondary battery 25 can be reliably charged while maintaining the continuity of vibration data detected by the sensor, etc.

[0065] (Second embodiment of diagnostic device for rotating equipment) A second embodiment of the diagnostic device for rotating machinery according to the present invention is shown in Fig. 3. Note that parts that are essentially the same as those in the above embodiment are given the same reference numerals and their description will be omitted.

[0066] In this embodiment, a diagnostic device 1A for a rotating device (hereinafter simply referred to as "diagnostic device 1A") is provided with positioning portions on the first case 3 and the second case 43 that enable alignment so that the power transmitting coil 50 and the power receiving coil 30 are disposed opposite each other. The positioning portions are made up of a recess 4 and a protrusion 44 that fits into the recess 4.

[0067] More specifically, a pair of recesses 4, 4 are formed on the surface of the first case 3 of the diagnostic unit 10, which faces the second case 43 and is located on both sides of the coil placement section 3a in the width direction. Also, a pair of protrusions 44, 44 are protruding from the surface of the second case 43 of the power transmission unit 40, which faces the first case 3 and is located on both sides of the coil placement section 43a in the width direction.

[0068] Furthermore, as shown in Figure 3, the receiving coil 30 and the receiving side core 31 are arranged between a pair of recesses 4, 4, and the transmitting coil 50 and the transmitting side core 51 are arranged between a pair of protrusions 44, 44.

[0069] The positioning portion is not limited to the above-described concave-convex fitting structure consisting of a concave portion and a convex portion, and is not particularly limited as long as it has a structure that allows the power transmission coil 50 to be positioned opposite the power receiving coil 30 while preventing misalignment.

[0070] In addition, although two recesses 4 and two protrusions 44 are provided in this embodiment, the number of recesses and protrusions may be one or three or more.

[0071] Furthermore, in this embodiment, the pair of recesses 4, 4 are both provided on the first case 3 side, and the pair of protrusions 44, 44 are both provided on the second case 43 side, but the recesses may be provided on the second case side, and the protrusions may be provided on the first case side. Also, a combination of one or more recesses and one or more protrusions may be provided on the first case 3 side, and a combination of one or more protrusions and one or more recesses may be provided on the second case 43 side.

[0072] Furthermore, the shape of the convex portion may be, for example, a columnar shape, a cylindrical shape, a hemispherical shape, a square columnar shape, a square tubular shape, a mountain shape with a wide base and a gradually decreasing diameter toward the top and a curved top, a truncated cone shape, an elliptical shape, a circular ring shape, a square ring shape, etc. The shape of the concave portion may be a shape that matches the shape of the convex portion, for example, a circular shape, a square shape, a convex shape, an elliptical shape, a circular ring shape, a square ring shape, etc. In other words, the concave portion and the convex portion may have any shape that allows the concave and convex portions to be fitted together.

[0073] It should be noted that the number, layout, shape, etc. of the recesses and protrusions that form the positioning portions described above can be selected appropriately in the third and subsequent embodiments described below.

[0074] Then, to charge the secondary battery 25, the pair of protrusions 44, 44 of the power transmission unit 40 are aligned with the pair of recesses 4, 4 on the rotating device 1 side, and the power transmission unit 40 is then brought close to the power receiving coil 30. Then, the pair of protrusions 44, 44 fit into the pair of recesses 4, 4, and the power transmission coil 50 is arranged in a non-contact state with the power receiving coil 30 via the first case 3 of the diagnostic unit 10 and the second case 43 of the power transmission unit 40. Furthermore, both ends of both cores 31, 51 face each other to form a transformer shape, and the power receiving coil 30 and the power transmission coil 50 are arranged opposite each other.

[0075] In this case, according to this embodiment, a positioning unit having the above-described configuration is provided, so that the power transmission coil 50 can be prevented from shifting position relative to the power receiving coil 30 while power is being transmitted from the power transmission coil 50 to the power receiving coil 30, and the secondary battery 25 can be charged more reliably.

[0076] Furthermore, since the positioning portion has a recessed / protruding fitting structure consisting of a recessed portion 4 and a protruding portion 44, it is possible to more reliably prevent the transmission coil 50 from shifting in position relative to the receiving coil 30 during power transmission from the transmission coil 50 to the receiving coil 30.

[0077] (Third embodiment of diagnostic device for rotating equipment) A third embodiment of the diagnostic device for rotating machinery according to the present invention is shown in Fig. 4. Note that parts that are essentially the same as those in the previous embodiment are given the same reference numerals and their description will be omitted.

[0078] The rotating equipment diagnostic device 1B in this embodiment (hereinafter simply referred to as "diagnostic device 10B") is provided with a positioning portion similar to that in the second embodiment, and this positioning portion consists of a recess 4a and a protrusion 44a that fits into this recess 4a.

[0079] The recess 4a is a substantially rectangular ring-shaped recess formed on the surface of the first case 3 of the diagnostic unit 10 facing the second case 43. Specifically, the recess 4a is a continuous, uninterrupted, substantially rectangular ring-shaped recess that extends long in one direction, and its four corners are rounded.

[0080] On the other hand, the protrusion 44a is a generally rectangular ring-shaped protrusion formed on the surface of the second case 43 of the power transmission unit 40 that faces the first case 3. Specifically, the protrusion 44a forms a generally rectangular ring-shaped recess that extends long in one direction and is continuous without interruption, and the four corners of the protrusion are rounded.

[0081] Although not specifically shown, the receiving coil 30 and the receiving side core 31 are arranged inside the recess 4a, which is approximately square-ring shaped, and the transmitting coil 50 and the transmitting side core 51 are arranged inside the protrusion 44a, which is also approximately square-ring shaped.

[0082] When the power transmitting unit 40 is brought close to the power receiving coil 30 to charge the secondary battery 25, the convex portion 44a fits into the concave portion 4a, and the power transmitting coil 50 is arranged in a non-contact state with the power receiving coil 30 via the first case 3 of the diagnostic unit 10 and the second case 43 of the power transmitting unit 40. The ends of both cores 31, 51 are arranged facing each other, and the power receiving coil 30 and the power transmitting coil 50 are arranged opposite each other.

[0083] In this case, since the third embodiment also has the recessed portion 4a and the protruding portion 44a as positioning portions, it is possible to obtain the same effects as the second embodiment.

[0084] (Fourth embodiment of diagnostic device for rotating equipment) A fourth embodiment of the diagnostic device for rotating machinery according to the present invention is shown in Fig. 5. Note that parts that are essentially the same as those in the above embodiment are given the same reference numerals and their description will be omitted.

[0085] The rotating equipment diagnostic device 1C in this embodiment (hereinafter simply referred to as "diagnostic device 1C") is provided with a positioning portion similar to that in the second embodiment, and this positioning portion consists of a recess 4b and a protrusion 44b that fits into this recess 4b.

[0086] The recess 4b is a generally U-shaped recess formed on the surface of the first case 3 of the diagnostic unit 10 facing the second case 43. Specifically, the recess 4b is made up of a pair of side portions arranged parallel to each other and a connecting portion connecting the pair of side portions, and the connecting portion between the side portions and the connecting portion has an R-shaped curved surface.

[0087] On the other hand, the protrusion 44b is a generally U-shaped protrusion formed on the surface of the second case 43 of the power transmission unit 40 that faces the first case 3. Specifically, the protrusion 44b is made up of a pair of side portions arranged parallel to each other and a connecting portion that connects the pair of side portions, and the connecting portion between the side portions and the connecting portion has an R-shaped curved surface.

[0088] Although not specifically shown, the receiving coil 30 and the receiving side core 31 are arranged inside the approximately U-shaped recess 4b, and the transmitting coil 50 and the transmitting side core 51 are arranged inside the approximately U-shaped protrusion 44b.

[0089] When the power transmitting unit 40 is brought close to the power receiving coil 30 to charge the secondary battery 25, the convex portion 44b fits into the concave portion 4b, and the power transmitting coil 50 is arranged in a non-contact state with the power receiving coil 30 via the first case 3 of the diagnostic unit 10 and the second case 43 of the power transmitting unit 40. The ends of both cores 31, 51 are arranged facing each other, and the power receiving coil 30 and the power transmitting coil 50 are arranged opposite each other.

[0090] In this case, since the fourth embodiment also has the recessed portion 4b and the protruding portion 44b as positioning portions, it is possible to obtain the same effects as the second embodiment.

[0091] (Fifth embodiment of diagnostic device for rotating equipment) A fifth embodiment of the diagnostic device for rotating machinery according to the present invention is shown in Fig. 6. Note that parts that are essentially the same as those in the above-described embodiment are given the same reference numerals and their description will be omitted.

[0092] In this embodiment, a rotating machine diagnostic device 1D (hereinafter simply referred to as "diagnostic device 1D") has a receiving portion 5 that protrudes from the lower end of a coil placement portion 3a of a first case 3 of a diagnostic unit 10, and a recess 5a is formed above the receiving portion 5. A ceiling portion 5b is provided on the upper end side of the coil placement portion 3a of the first case 3. Furthermore, a power receiving core 31 is disposed above the recess 5a.

[0093] Meanwhile, a flange 45 projects from the upper end of the coil placement section 43a of the second case 43 of the power transmitting section 40, and the power transmitting side core 51 is placed below the flange 45, with a protrusion 45a protruding from further below the flange 45. A bottom 45b is provided on the lower end side of the coil placement section 43a of the case 43.

[0094] When the power transmitting unit 40 is brought close to the power receiving coil 30 to charge the secondary battery 25, the bottom 45b of the power transmitting unit 40 is supported by the receiving portion 5 of the first case 3, the convex portion 45a fits into the concave portion 5a, and the flange portion 45 of the power transmitting unit 40 is supported by the ceiling portion 5b of the first case 3, and the power transmitting coil 50 is arranged in a non-contact state with the power receiving coil 30 via the first case 3 of the diagnostic unit 10 and the case 43 of the power transmitting unit 40. The ends of both cores 31, 51 are arranged facing each other, and the power receiving coil 30 and the power transmitting coil 50 are arranged opposite each other.

[0095] In this case, since the fifth embodiment also has the recessed portion 5a and the protruding portion 45a as positioning portions, it is possible to obtain the same effects as the second embodiment.

[0096] (Sixth embodiment of diagnostic device for rotating equipment) A sixth embodiment of the diagnostic device for rotating machinery according to the present invention is shown in Figures 7 and 8. Note that parts that are essentially the same as those in the above-described embodiment are given the same reference numerals and their description will be omitted.

[0097] In this embodiment, the rotating equipment diagnostic device 1E (hereinafter simply referred to as "diagnostic device 1E") has a ceiling portion 6a provided on the upper end side of the coil arrangement portion 3a of the first case 3 of the diagnostic unit 10, and a flange portion 46a protruding from the upper end of the coil arrangement portion 43a of the second case 43 of the power transmission unit 40.

[0098] Furthermore, Figure 8 is a schematic diagram of the diagnostic device 1E when viewed from a planar direction, and as shown in Figure 9, the coil arrangement section 3a of the first case 3 has an uneven shape consisting of a pair of recesses 4, 4 and a protrusion 4c arranged between this pair of recesses 4, 4.

[0099] On the other hand, the coil arrangement portion 43a of the second case 43 has a concave-convex shape consisting of a pair of convex portions 44, 44 that fit into a pair of concave-convex portions 4, 4 of the first case 3, and a concave portion 44c that is arranged between this pair of convex portions 44, 44 and into which the convex portion 4c of the first case 3 fits.

[0100] In addition, the power transmission side core 51 on the power transmission unit 40 side is approximately U-shaped, as in the embodiment shown in Figures 1 and 2, while the power receiving side core 31 on the diagnostic unit 10 side is rod-shaped and extends straight in a linear manner.

[0101] Furthermore, both side portions of the middle portion 33 of the receiving side core 31 abut against the bottom of a pair of recesses 4, 4 of the first case 3, and the insulator 35 and receiving coil 30 attached to the middle portion 33 of the receiving side core 31 are positioned in a fitted state inside the protrusion 4c of the first case 3, thereby holding the receiving side core 31 in a positioned state relative to the coil placement portion 3a of the first case 3.

[0102] In addition, by positioning both end portions 52a, 52a of the power transmission side core 51 in a fitted state inside a pair of protrusions 44, 44 of the second case 43, the power transmission side core 51 is held in a positioned state relative to the coil arrangement portion 43a of the second case 43.

[0103] Furthermore, a lid 6 is attached to the lower end of the coil placement section 3a of the first case 3 via a hinge or the like (not shown) so as to be able to open and close the pair of recesses 4, 4. The lid 6 closes the pair of recesses 4, 4 except when the secondary battery 25 is being charged.

[0104] In this embodiment, the lid portion 6 is provided on the first case 3 side of the diagnostic unit 10, but if the recess is provided on the case side of the power transmission unit, the lid portion will be provided on the second case side of the power transmission unit.

[0105] When charging the secondary battery 25, first, the lid 6 is opened from the pair of recesses 4, 4 on the first case 3 side to expose the pair of recesses 4, 4, and then the power transmitting unit 40 is brought close to the power receiving coil 30. Then, the pair of protrusions 44, 44 on the second case 43 side are fitted into the pair of recesses 4, 4, and the protrusion 4c on the first case 3 is fitted into the recess 44c on the second case 43 side, and the flange 46a of the power transmitting unit 40 is supported by the ceiling 6a of the first case 3, and the power transmitting coil 50 is arranged in a non-contact state with the power receiving coil 30 via the first case 3 of the diagnostic unit 10 and the second case 43 of the power transmitting unit 40.

[0106] In this case, the two end portions 52a, 52a of the power transmitting side core 51 are arranged facing each other on both sides of the intermediate portion 33 of the power receiving side core 31, via the first case 3 and the second case 43, and the power receiving side core 31 and the power transmitting side core 51 form a transformer shape that is approximately a D-shaped ring.

[0107] In this case, since the sixth embodiment also has the recessed portions 4, 44c and the protruding portions 4c, 44 as positioning portions, it is possible to obtain the same effects as the second embodiment.

[0108] In addition, in this embodiment, the first case 3 is provided with a lid portion 6 that opens and closes the pair of recesses 4,4. By closing the lid portion 6 over the pair of recesses 4,4 so that the lid portion 6 covers the openings of the pair of recesses 4,4, foreign matter such as dust, dirt, sand, etc. can be prevented from entering the recesses 4, and the recessed portion 44 can be reliably fitted into the recessed portion 4.

[0109] (Seventh embodiment of diagnostic device for rotating equipment) A seventh embodiment of the diagnostic device for rotating machinery according to the present invention is shown in Fig. 9. Note that parts that are essentially the same as those in the above-described embodiment are given the same reference numerals and their description will be omitted.

[0110] In this embodiment, the diagnostic device 1F for rotating equipment (hereinafter simply referred to as "diagnostic device 1F") has a receiving portion 7 that protrudes from the lower end of the coil arrangement portion 3a of the first case 3 of the diagnostic unit 10, and a guide protrusion 7a that forms a protrusion extending a predetermined length is provided on the upper surface of the receiving portion 7.

[0111] A ceiling 7b is provided on the upper end side of the coil placement section 3a of the first case 3, and a guide groove 7c having a predetermined length and shaped like a recessed groove is provided on this ceiling 7b. Furthermore, the power receiving side core 31 is arranged in the coil placement section 3a of the first case 3, below the ceiling 7b and the guide groove 7c.

[0112] On the other hand, a flange portion 47 protrudes from the upper end of the coil arrangement portion 43a of the second case 43 of the power transmission unit 40, and a guide protrusion 47a is provided, which forms a protrusion extending a predetermined length from the underside of the flange portion 47 and is slidably guided in the guide groove portion 7c.

[0113] A bottom 47b is provided on the lower end side of the coil arrangement portion 43a of the second case 43, and a guide groove 47c is provided on the bottom 47b. The guide groove 47c is a recessed groove extending a predetermined length and guides the guide protrusion 7a in a slidable manner. Furthermore, the power transmitting side core 51 is arranged in the coil arrangement portion 43a of the second case 43 above the bottom 47b and the guide groove 47c.

[0114] The guide protrusion 7a and the guide groove 47c, and the guide groove 7c and the guide protrusion 47a, together form the "guide portion" in the present invention.

[0115] When charging the secondary battery 25, the guide protrusion 7a on the first case 3 side is aligned with the guide groove 47c on the second case 43 side, and the guide protrusion 47a on the second case 43 side is aligned with the guide groove 7c on the first case 3 side, and the power transmission unit 40 is brought close to the power receiving coil 30 on the first case 3 side.

[0116] Then, the guide protrusion 7a is inserted into the guide groove 47c, and the guide protrusion 47a is inserted into the guide groove 7c, slidingly guiding the approaching movement of the power transmission unit 40 relative to the first case 3, and the power transmission coil 50 is arranged in a non-contact state with the power receiving coil 30 via the first case 3 of the diagnostic unit 10 and the second case 43 of the power transmission unit 40. In addition, the ends of both cores 31, 51 are arranged facing each other, and the power receiving coil 30 and the power transmission coil 50 are arranged opposite each other.

[0117] In this embodiment, guide portions (guide protrusion 7a and guide groove portion 47c, guide groove portion 7c and guide protrusion 47a) having the above-described configuration are provided, so that the power transmission unit 40 can be smoothly positioned close to the power receiving coil 30 while being guided thereto, thereby improving the workability of positioning the power transmission unit 40 relative to the power receiving coil 30. [Example]

[0118] Regarding the diagnostic device for rotating machinery of the present invention, we tested whether it was possible to charge a secondary battery, taking into account that electromagnetic induction is less likely to occur when the core is divided and metal is interposed between the cores, and that it is desirable to use metal for the exterior in consideration of the explosion-proof specifications of the sensor.

[0119] (Test Method) Using a diagnostic device with a structure generally similar to that of the embodiment shown in Fig. 1, an AC voltage of a predetermined frequency was applied to the power transmitting coil of the primary power transmitting section, causing a current to flow through the power transmitting coil to generate magnetic flux, and a test was conducted to determine the level of induced current generated in the secondary power receiving coil. The horizontal axis represents the gap between the primary core (power transmitting core) and the secondary core (power receiving core) in ascending order: (a) 0 mm, (b) 1.4 mm, (c) 1.6 mm, (d) 2.4 mm, (e) 4.0 mm, and (f) 5.0 mm. The AC voltage frequency was 30 Hz (Fig. 10A) and 100 Hz (Fig. 10B).

[0120] The power receiving coil and the power transmitting coil were configured in the following ways (a) to (f): (a) when the power receiving coil and the power transmitting coil are in direct contact with each other, (b) when a stainless steel (SUS) plate is interposed between the power receiving coil and the power transmitting coil, (c) when an iron plate is interposed between the power receiving coil and the power transmitting coil, (d) when a zinc-plated iron plate is interposed between the power receiving coil and the power transmitting coil, (e) when a vinyl chloride plate is interposed between the power receiving coil and the power transmitting coil, and (f) when the power receiving coil and the power transmitting coil are spaced a predetermined distance apart (when an air layer is interposed). (a) to (f) in Figures 9A and 9B refer to the above configurations.

[0121] It can be evaluated that the charging efficiency of the secondary power receiving coil is higher when the induced current in the secondary power receiving coil is closer to the current in the primary power transmitting coil.

[0122] (Test results) As shown in (b) to (d) of Figures 10A and 10B, it can be seen that a secondary battery can be charged even when a metal plate is interposed between the receiving coil and the transmitting coil. Furthermore, as shown in (b) of Figures 10A and 10B, when a stainless steel plate is interposed between the receiving coil and the transmitting coil, the current in the secondary receiving coil is larger than in the other configurations (c) to (f), and the secondary battery can be sufficiently charged. Furthermore, it can be seen that electromagnetic induction is less likely to occur in the case of iron in (c) and (d), and that induction efficiency improves when the gap is narrow and the frequency is low.

[0123] It should be noted that the present invention is not limited to the above-described embodiment, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. [Explanation of symbols]

[0124] 1, 1A, 1B, 1C, 1D, 1E, 1F... Rotating device diagnostic device (diagnostic device), 3... First case, 3a... Coil arrangement section, 4, 4a, 4b, 5a, 6... Recess, 6b... Cover section, 7a... Guide protrusion, 7c... Guide groove section, 20... Board, 25... Secondary battery, 30... Power receiving coil, 31... Power receiving Side core, 32a...tip portion, 35...insulator, 40...power transmission portion, 43...second case, 43a...coil arrangement portion, 44, 44a, 44b, 45a, 46...convex portion, 47a...guide protrusion, 47c...guide groove portion, 50...power transmission coil, 51...power transmission side core, 52a...tip portion, 55...insulator.

Claims

1. A rotating equipment diagnostic device that is disposed in a rotating part of a rotating equipment installed in a plant or factory and diagnoses a condition of the rotating part, comprising: a diagnostic unit attached to the rotating device and a power transmission unit separate from the diagnostic unit, the diagnostic unit has a first case, a sensor disposed in the first case for acquiring information from the rotating unit and detecting a state of the rotating unit, a secondary battery disposed in the first case for supplying power to the sensor, a receiving coil disposed in the first case and conducting to the secondary battery, and a receiving-side core disposed in the first case and to which the receiving coil is attached, a power transmission coil disposed within the second case and arranged in a non-contact state with respect to the power receiving coil via the first case and the second case, the power transmission coil transmitting power to the power receiving coil by electromagnetic induction; and a power transmission side core to which the power transmission coil is attached.

2. The power receiving side core and the power transmitting side core are configured as if a single core is divided, 2. The diagnostic device for a rotating machine according to claim 1, wherein when the power transmission coil is arranged in a non-contact state with the power receiving coil, at least one end of the power receiving core and one end of the power transmission core face each other via the first case and the second case to form a single core.

3. the power receiving coil has two ends that respectively abut against the inner surface of the first case, and the power receiving coil is attached between the two ends, the power transmission side core has two end portions that respectively abut against the inner surface of the second case, and the power receiving coil is attached between the two end portions; 3. The diagnostic device for a rotating machine according to claim 2, wherein when the power transmission coil is arranged in a non-contact state with the power receiving coil, both ends of the power receiving core and both ends of the power transmission core face each other via the first case and the second case, forming a ring-shaped transformer shape.

4. The diagnostic device for a rotating machine according to any one of claims 1 to 3, wherein the first case and the second case are provided with positioning portions that enable alignment so that the transmitting coil and the receiving coil are arranged opposite each other.

5. The rotating equipment diagnostic device according to any one of claims 1 to 3, wherein the inside of the first case and / or the second case is filled with resin, and at least one selected from the sensor, the secondary battery, the receiving coil, the receiving side core, the transmitting coil, and the transmitting side core is covered with the resin to provide an explosion-proof specification.

6. The diagnostic device for a rotating machine according to any one of claims 1 to 3, wherein the first case and the second case are provided with guide portions that guide the power transmission unit when it is brought close to the power receiving coil so that the power transmission coil is arranged in a non-contact state with respect to the power receiving coil.

7. 5. The diagnostic device for a rotating machine according to claim 4, wherein the positioning portion comprises a recess and a protrusion that fits into the recess.

8. The diagnostic device for a rotating machine according to claim 7, wherein the first case or the second case is provided with a lid that opens and closes the recess.

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