JP2009085259A - Grease supply monitoring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grease supply monitoring device. <P>SOLUTION: The grease supply monitoring device includes a hollow member through which grease passes, a rotary body arranged within the hollow member so as to rotate during the passing of the grease, and a detection section for detecting rotational motion of the rotary body. The rotary body is, for example, an impeller having extension parts formed at the tip ends of vanes and extending in a direction opposite to the rotating direction and a plurality of magnets attached to the extension parts with spaces in the direction of extension. Alternatively, the rotary body is a rotary ring connecting tip ends of vanes to each other and having a plurality of magnets mounted at intervals on the circumference thereof. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a monitoring device suitable for monitoring the state of grease supply to a rotating machine such as a rolling mill that is frequently used as a steelmaking facility.

  Rotating machines such as rolling mills and conveyors need to be lubricated with grease and other lubricants at regular intervals. Generally, a method of supplying grease from an automatic centralized lubricator to each device via a distribution valve is generally used. Has been.

  In this case, the greasing state is monitored by the number of times of opening and closing of the distributing valve and the pressure sensor attached in the immediate vicinity of each device, but in the former case, the greasing state after the distributing valve cannot be detected, in the latter case, An expensive pressure sensor is arranged for each device, and wiring work for supplying power is also required, so that the equipment cost becomes high.

Patent Document 1 discloses a grease supply state monitoring sensor in which a piezoelectric element such as a piezo element that senses strain and generates an electrical signal and a strain detection element are attached to a member that undergoes bending deformation due to the flow of a lubricant. Are listed. In the case of a piezoelectric element such as a piezoelectric element or a strain detection element, it is not necessary to supply power, and the sensor can be made small and inexpensive.
Japanese Patent Laid-Open No. 2004-44752

  By the way, in an ironworks, the environment of a device that requires a lubricant varies greatly depending on the position of the device and seasonal factors, and the amount of lubricant supplied for lubrication is also set for each device.

  Therefore, in the case of piezoelectric elements such as piezo elements and strain detection elements, temperature compensation of the signal output, zero point adjustment, and selection of the detection part material that generates an appropriate signal output that is bent and deformed by the flow of lubricating oil. The burden on production and operation is large.

  In addition, when a piezoelectric element is used, the piezoelectric element detects a pressure signal as well as a strain signal due to bending deformation, and pressure is generated when the pipe is closed. Therefore, even if the lubricant does not flow, it is erroneously detected and inferior in reliability. .

  Accordingly, an object of the present invention is to provide a grease supply monitoring device having a simple structure and a small load on an operator.

The object of the present invention can be achieved by the following means.
1. A grease supply monitoring device that detects a flow state of grease in a grease supply path, a hollow member through which grease passes, a rotating body that is disposed in the hollow member and rotates as grease passes, A grease supply monitoring device having a detection unit for detecting a rotational motion of a rotating body.
2. The rotating body is an impeller, and the detection unit is a signal processing unit that determines a rotating state of the rotating body from a magnet attached to the impeller, a magnetic sensor attached to the hollow member, and a signal of the magnetic sensor. 2. The grease supply monitoring device according to 1, wherein the grease supply monitoring device is provided.
3. The impeller has an extension extending in the counter-rotating direction at the tip of the blade, and the magnet is attached to the extension at the tip of the blade of the impeller, or a plurality of magnets are attached at intervals in the extension direction. 2. The grease supply monitoring device according to 2, wherein
4). 3. The grease lubrication monitoring apparatus according to claim 2, wherein the impeller has a rotating ring connecting blade tips, and a plurality of the magnets are attached at intervals on the circumference of the rotating ring. .

  INDUSTRIAL APPLICABILITY According to the present invention, it is possible to ascertain with a simple device that grease is supplied to each device that requires grease lubrication, which is extremely useful in industry.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a partial sectional view for explaining the structure of a grease lubrication monitoring apparatus according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the grease lubrication monitoring apparatus shown in FIG. Grease monitoring device, 2 is an impeller, 3 is an upper cover of the hollow member 16, 4 is a lower cover of the hollow member 16, 5 is an upper cover 3, a fastening screw for fixing the lower cover 4 to the hollow member 16, and 6 is a hollow member 16 is an adapter for connecting the pipe 7 to the opening 12 serving as an inlet or outlet of grease, 10 is an O-ring that seals between the hollow member 16 and the upper lid 3 (lower lid 4), and 11 is a hollow of the hollow member 16. , 12 is an opening through which grease is supplied to or discharged from the hollow member 16, and 13 is a groove that supports the end of the rotary shaft 23 in order to rotatably support the impeller 2 within the hollow member 16. 14 is inserted into the groove 13 and the rotation shaft 23 15 is a screw hole of the fastening screw 5, 21 is a blade of the impeller, 22 is an extension member attached to the tip of the impeller, 25 is a magnet, 31 and 41 are fastening screws 5 The through-hole to insert is shown.

  The grease supply monitoring device 1 includes a hollow member 16 through which the grease passes through the hollow portion 11, an impeller 2 disposed in the hollow member 16 so as to rotate by the flow of the grease, and a detection unit that detects the rotational motion thereof. Have.

  The hollow member 16 has a cylindrical shape and is provided with an opening 12 for supplying or discharging grease facing the body. The grease is supplied to the hollow portion 11 or discharged from the hollow portion 11 by a pipe 7 connected to the opening portion 12 via the adapter 6.

  The two opposing walls that support the rotating shaft 23 of the impeller 2 are opposed to the inner wall of the hollow portion 11 so as to be orthogonal to the flow of grease from one opening 12 serving as an inlet toward the other opening 12 serving as an outlet. The groove 13 is provided with an appropriate length from the upper end of the hollow member 16.

  The length of the groove 13 from the upper end of the hollow member 16 is such that the linear flow of grease from the opening 12 serving as the inlet to the opening 12 serving as the outlet directly hits the blade 21 of the impeller 2. It is desirable to set.

When the height from the rotation center of the rotating shaft 23 of the impeller 2 to the tip of the blade 21 is h _0, and the distance from the rotation center of the rotating shaft 23 of the impeller 2 to the opening center of the opening 12 is h H = (1/2 to 3/4) h ₀ is desirable.

  In order to rotate the impeller 2 stably, a support member 14 is inserted into the groove portion 13 to hold the end of the rotating shaft 23 from above, and between the end portion in the length direction of the groove portion 13 and the support member 14, The end of the rotating shaft 23 is held. The width and depth of the groove 13 are dimensions that allow the end of the rotating shaft 23 of the impeller 2 to be freely rotated.

  In order to make the hollow member 16 have a sealed structure, the upper lid 3 and the lower lid 4 are fastened with fastening screws 5. The fastening screw 5 is inserted into the screw hole 31 of the upper lid 3 (the screw hole 41 of the lower lid 4) and is screwed into the screw hole 15 provided in the hollow member 16.

  When the upper lid 3 and the lower lid 4 are fastened to the hollow member 16 with the fastening screw 5, the O-ring 10 is sandwiched so that grease does not leak (the figure shows the O-ring 10 attached between the upper lid 3 and the hollow member 16. Shows the case).

  The impeller 2 has a plurality of blades 21 at equal intervals in the circumferential direction, and an extension 22 extending in the counter-rotating direction of the impeller 2 is provided at the tip thereof. If the extension part 22 is extended in the rotation direction, it becomes a resistance when the impeller 2 rotates, and thus the extension part 22 is extended in the counter-rotation direction.

  The rotation of the impeller 2 is performed by processing the rotation of the impeller 2 by processing the magnet 25 attached to the extension 22 of the blade 21, the sensor 26 that detects a change in the magnetic lines of force of the magnet 25, and the signal of the sensor 26. Detection is performed by a detection mechanism having a signal processing circuit for determination.

  As shown in FIG. 3, it is desirable to attach a plurality of magnets 25 at intervals in the extending direction of the extension 22. Since the flow of grease in the hollow portion 11 is slow, the rotational speed of the impeller 2 is low, and it is difficult to determine the presence or absence of rotational motion between the blades 21 depending on the interval between the blades 21 and the diameter of the impeller 2. It is desirable to attach a plurality.

  In addition, as shown in FIG. 4, a plurality of magnets 25 may be attached by attaching a rotating ring 24 on the circumference connecting the tip portions of the blades 21. The gap a between the sensor 26 and the tip of the blade 21 is appropriately set according to the detection sensitivity of the sensor 26 to be used. Depending on the detection sensitivity obtained, the magnet 25 may be directly attached to the blade 21.

  As the magnet 25, for example, a zebra-shaped magnet sheet can be used, and as the sensor 26, an MR sensor for detecting rotation can be used. Alternatively, only the impeller 2 may be made of a magnetic material, and all other parts may be made of a non-magnetic material. In addition to the magnet 25, the detection of the approach and separation of the blades 21 of the impeller 2 to the sensor 26 may be used. good.

  FIG. 5 shows an example of a grease lubrication system using the grease lubrication monitoring apparatus 1 according to the present invention. The grease supply monitoring device 1 is arranged between the distribution valve 8 and the rotating device 9 in the factory. The position of the grease supply monitoring device 1 is preferably as close to the rotating device 9 as possible, and more preferably directly attached to the rotating device 9 if possible.

One embodiment of the present invention. The disassembled perspective view of the example of the present invention shown in FIG. The external appearance perspective view explaining the other example of the impeller of the example of this invention shown in FIG. The external appearance perspective view explaining the other example of the impeller of the example of this invention shown in FIG. The figure which shows an example of the grease greasing system using the grease greasing monitoring apparatus which concerns on one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grease supply monitoring apparatus 2 Impeller 3 Upper lid 4 Lower lid 5 Fastening screw 6 Adapter 10 O-ring 11 Hollow part 12 Opening part 13 Groove part 14 Support material 15 Screw hole 16 Hollow member 21 Blade 22 Extension part 23 Rotating shaft 24 Rotation Ring 25 Magnet 26 Sensor 31, 41 Through hole

Claims (4)

  A grease supply monitoring device that detects a flow state of grease in a grease supply path, a hollow member through which grease passes, a rotating body that is disposed in the hollow member and rotates as grease passes, A grease supply monitoring device having a detection unit for detecting rotational movement of a rotating body.   The rotating body is an impeller, and the detection unit is a signal processing unit that determines a rotating state of the rotating body from a magnet attached to the impeller, a magnetic sensor attached to the hollow member, and a signal of the magnetic sensor. The grease supply monitoring device according to claim 1, further comprising:   The impeller has an extension that extends in the counter-rotating direction at the tip of the blade, and the magnet is attached to the extension at the tip of the blade of the impeller, or a plurality of magnets that are spaced apart in the extension direction. The grease supply monitoring device according to claim 2, wherein   The grease supply according to claim 2, wherein the impeller has a rotating ring connecting blade tips, and a plurality of the magnets are attached at intervals on a circumference of the rotating ring. Monitoring device.

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