JP5276498B2 - Rotor inspection method and inspection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection method and an inspection device of a rotor for determining automatically an abnormality of each vane storing groove. <P>SOLUTION: In the inspection method of the rotor 1 having a plurality of vane storing grooves 3 extending radially from the center of a rotating shaft of the rotor 1, a plurality of inspection gages 11 to be fitted slidably into each vane storing groove 3 are moved to the rotating shaft direction of the rotor 1, to thereby allow to be passed through each vane storing groove 3 simultaneously, and a sliding resistance working on each inspection gage 11 is measured individually, to thereby determine an abnormality of the rotor 1. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rotor inspection method and inspection device provided in a vane pump.

  2. Description of the Related Art Conventionally, a vane pump mounted as a hydraulic pressure source on a vehicle includes a plurality of vanes that reciprocate in a radial direction with respect to a rotating rotor, and a pump chamber partitioned by each vane expands and contracts as the rotor rotates. The working fluid is supplied and discharged (see Patent Document 1).

  In the rotor, if a machining error occurs during cutting of the vane receiving groove or a dent is generated in the vane receiving groove during conveyance, there is a possibility that the vane does not fit into the vane receiving groove smoothly in the assembly process. Further, when a dent or the like is generated in the vane receiving groove, even if the vane is received in the vane receiving groove in the assembly process, the efficiency of the vane pump may be reduced due to the sliding failure of the vane.

  In response to this, conventionally, an operator has inserted a gauge into the vane receiving groove to check whether the vane receiving groove is normally formed.

  Further, as a gauge for measuring a gap between a rotor and a casing, for example, there is one disclosed in Patent Document 2.

JP 2000-179469 A Japanese Patent Application Laid-Open No. 08-304061

  However, in such a conventional rotor inspection method, the operator needs to insert gauges one by one into a plurality of (for example, 12) vane receiving grooves formed in the rotor. There was a problem that work was troublesome.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a rotor inspection method and inspection apparatus that automatically determine abnormality of each vane housing groove.

The present invention relates to a method for inspecting a rotor in which a plurality of vane receiving grooves extend radially from the center of the rotation shaft of the rotor, and a plurality of inspection gauges slidably fitted in the respective vane receiving grooves and an actuator. A load cell that detects the load acting through the inspection gauge that moves in the direction of the rotation axis and is simultaneously passed through each vane receiving groove, and a gauge tip that detects whether the gauge tip of the inspection gauge is inserted into the vane receiving groove A sliding unit acting on each inspection gauge is individually measured, and a rotor abnormality is determined based on a measured value of the gauge unit .

Further, the present invention is a rotor inspection apparatus in which a plurality of vane receiving grooves extend radially from the center of the rotation shaft of the rotor, and a plurality of inspection gauges slidably fitted in the respective vane receiving grooves, An actuator that moves the inspection gauge in the direction of the rotation axis of the rotor and passes through each vane receiving groove at the same time , and a gauge unit that individually measures the sliding resistance acting on each inspection gauge , and the gauge unit passes through the inspection gauge. A load cell for detecting the load acting on the gauge and a gauge tip insertion detecting means for detecting whether or not the gauge tip of the inspection gauge is inserted into the vane receiving groove, and detecting a rotor abnormality based on the measured value of the gauge unit. It is characterized by determining.

  According to the present invention, when the sliding resistance of the inspection gauge is large, it can be automatically determined that an abnormality such as a processing defect or a dent is generated in each vane receiving groove.

  By moving the plurality of inspection gauges in the direction of the rotation axis of the rotor and passing them through the vane receiving grooves simultaneously, the tact time required for inspecting one rotor can be reduced.

  By moving a plurality of inspection gauges in the direction of the rotation axis of the rotor, each inspection gauge can be moved simultaneously by a single actuator, and the structure of the inspection apparatus can be simplified.

1 is a schematic plan view of an inspection apparatus showing an embodiment of the present invention. The schematic side view and schematic front view of a gauge unit. The schematic side view which similarly shows operation | movement of an inspection apparatus. The side view and front view of an inspection gauge similarly. The flowchart which shows this control operation similarly performed with a controller.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic plan view showing a configuration of an inspection apparatus 10 for a rotor 1 provided in a vane pump.

  The vane pump includes a plurality of vanes (not shown) that reciprocate in the radial direction with respect to the rotor 1, and the pump chamber partitioned by each vane expands and contracts as the rotor 1 rotates. The pump chamber whose volume expands with the rotation of the rotor 1 sucks the working fluid from a suction port (not shown), while the pump chamber whose volume shrinks with the rotation of the rotor 1 has a discharge port (see FIG. The pressurized working fluid is discharged from (not shown).

  The cylindrical rotor 1 is formed with a spline hole 2 into which a drive shaft (not shown) is fitted at the center thereof, and a plurality of vane receiving grooves 3 in which the vanes are slidably received are formed radially. Is done.

  The vane housing groove 3 extends in the direction of the rotation axis of the rotor 1, extends radially from the center of the rotation axis, and opens over both side surfaces and the outer peripheral surface of the rotor 1. In the rotor 1 formed as a sintered body, the vane housing groove 3 is finished to a specified dimension by a cutting machine (not shown).

  By the way, in the rotor 1, there is a possibility that a machining error occurs during cutting of the vane receiving groove 3, or a dent is generated in the vane receiving groove 3 during conveyance, so that the vane does not fit smoothly in the vane receiving groove 3 in the assembly process. There is.

  In response to this, the vane pump production line is provided with an inspection line (not shown) including an inspection device 10 for the rotor 1, and the vane receiving groove is formed by using the inspection device 10 as will be described later in this inspection line. An inspection process is performed to inspect whether 3 has a constant groove width. After the processing step for forming the rotor 1 is performed, only the rotor 1 that has been determined to have no abnormality in this inspection step proceeds to the next assembly step, and an assembly step in which the vane is assembled to the rotor 1 and the vane pump is assembled. Done.

  Hereinafter, the configuration of the inspection apparatus 10 for the rotor 1 will be described.

  The inspection apparatus 10 moves a jig 15 that supports the rotor 1, an inspection gauge 11 that is slidably fitted into the vane receiving groove 3 of the rotor 1, and a plurality of inspection gauges 11 in the direction of the rotation axis of the rotor 1. Then, the actuator 20 that passes through the vane receiving groove 3 of the rotor 1, the gauge unit 30 that individually measures the sliding resistance acting on each inspection gauge 11, and the abnormality of the rotor 1 is determined based on the measured value of each gauge unit 30. And a controller (not shown).

  2A is a schematic side view showing the gauge unit 30, and FIG. 2B is a schematic front view showing the gauge unit 30.

  The actuator 20 translates (lifts and lowers) the annular bracket 31 in the direction of the rotation axis of the rotor 1 by the power of an electric motor (not shown).

  The bracket 31 has a U-shaped cross section, and includes a disc-shaped upper ring portion 31a and a lower ring portion 31b extending in the horizontal direction, and a cylindrical outer ring portion 31c extending in the vertical direction.

  The gauge unit 30 detects a load acting on the guide rod 33 through the inspection gauge 11 and a guide rod 33 that supports the bracket 31 so that the inspection gauge 11 can be moved (lifted) in the direction of the rotation axis of the rotor 1. And a load cell 17.

  Two bushes 32 that pass through the lower ring portion 31b of the bracket 31 are fixedly provided, and guide rods 33 are slidably inserted into the bushes 32, respectively. Each bush 32 is disposed so as to extend in the rotation axis direction (vertical direction) of the rotor 1, and supports each guide rod 33 so that the guide rod 33 can be moved (lifted / lowered) in the rotation axis direction (vertical direction) of the rotor 1.

  The upper parts of the two guide rods 33 are connected by a load receiving frame 34. The load receiving frame 34 extends in the horizontal direction and translates (moves up and down) together with the guide rods 33 in the rotation axis direction (vertical direction) of the rotor 1.

  The gauge unit 30 includes gauge tip insertion detection means for detecting whether or not the gauge tip 11a of the inspection gauge 11 is inserted into the vane receiving groove 3 of the rotor 1 when the gauge unit 30 is lowered by the operation of the actuator 20. Prepare. As the gauge tip insertion detection means, the bracket 31 is provided with a photoelectric sensor 18 for detecting the movement of the load receiving frame 34. The photoelectric sensor 18 is turned on when the load receiving frame 34 is in the lower position as shown in FIG. 3A, and the load receiving frame 34 is predetermined from the lower position as shown in FIG. 3B. Moves (rises) by distance and turns off. The ON / OFF signal of the photoelectric sensor 18 is input to the controller.

  The load cell 17 is attached to the lower surface of the upper ring portion 31a of the bracket 31. As shown in FIG. 3C, when the guide rod 33 slides with respect to the bush 32 and the load receiving frame 34 moves (rises) by a predetermined distance, the load receiving frame 34 comes into contact with the load cell 17. The load cell 17 outputs a signal corresponding to the load applied from the load receiving frame 34 to the controller.

  The gauge unit 30 includes a floating mechanism 40 that supports the inspection gauge 11 so as to be relatively displaceable with respect to the actuator 20. Thereby, even if there is a slight error in the position of the vane accommodation groove 3 of the rotor 1, the deviation of the inspection gauge 11 with respect to the vane accommodation groove 3 is corrected via the floating mechanism 40.

  The floating mechanism 40 includes a guide block 36 connected to the lower end portion of the guide rod 33, and a guide groove 37 is formed in the guide block 36 to slidably fit the inspection gauge 11. A guide sheet 38 for seating the tip (lower end) of the inspection gauge 11 and a guide stopper 39 for engaging the base end (upper end) of the inspection gauge 11 to prevent the inspection gauge 11 from being attached are attached to the guide block 36. It is done.

  The guide groove 37 is disposed so as to extend in the extending direction of the vane receiving groove 3 of the rotor 1, and the inspection gauge 11 fitted into the guide groove 37 is moved by the guide block 36 as the guide block 36 is lowered. It is supposed to be inserted through.

  The guide groove 37 fits the inspection gauge 11 with a predetermined clearance. As a result, the inspection gauge 11 is allowed a slight relative displacement with respect to the guide rod 33.

  4A is a side view of the inspection gauge 11, and FIG. 4B is a front view of the inspection gauge 11. The inspection gauge 11 is formed in a flat plate shape having a predetermined plate thickness A. The inspection gauge 11 has a tapered gauge tip 11a. The thickness B of the gauge tip 11a is smaller than the thickness A.

  The thickness A of the inspection gauge 11 is formed slightly smaller than the groove width C of the vane receiving groove 3 of the rotor 1 and slightly larger than the thickness D of the vane. That is, the dimensional relationship of D <A <C is set.

  With respect to the rotation axis direction of the rotor 1, the length of the inspection gauge 11 is formed to be equal to the length of the vane receiving groove 3.

  The length of the inspection gauge 11 is not limited to this, and may be formed as short as, for example, about half of the length of the vane receiving groove 3.

  The controller operates the actuator 20 to lower the gauge unit 30 at a predetermined low speed V1 by a predetermined stroke E1, and the gauge tip 11a of the inspection gauge 11 is inserted into the vane receiving groove 3 based on a signal from the photoelectric sensor 18. It is determined that it has been done. If it is determined that the gauge tip 11a has been inserted into the vane receiving groove 3, the gauge unit 30 is further lowered by a predetermined stroke E2 at a predetermined high speed V2, and the load F detected by the load cell 17 is reduced. It is determined whether or not the predetermined value F1 is exceeded. Here, it is assumed that the rotor 1 is normal when the detected load F is smaller than the predetermined value F1, and that the rotor 1 is abnormal when the load F detected by the load cell 17 exceeds the predetermined value F1, This determination result is notified.

  This control operation executed by the controller will be described with reference to the flowchart of FIG.

  First, it is determined whether or not the rotor 1 to be inspected in step 1 is set in the inspection apparatus 10 via the jig 15.

  Here, when it is determined that the inspection apparatus 10 is set, the process proceeds to step 2 where the actuator 20 is operated to lower the gauge unit 30 by a predetermined stroke E1 at a predetermined low speed V1.

  In the subsequent step 3, the ON / OFF signal of the photoelectric sensor 18 is determined.

  Here, when it is determined that the signal of the photoelectric sensor 18 is OFF, the process proceeds to step 7 to notify that the rotor 1 is abnormal. When the signal of the photoelectric sensor 18 is OFF, the load receiving frame 34 is separated from the lower position as shown in FIG. 3B, and the gauge tip 11 a of the inspection gauge 11 is not inserted into the vane receiving groove 3. It is regarded as a thing.

  On the other hand, when it is determined that the signal of the photoelectric sensor 18 is ON, the gauge tip 11a of the inspection gauge 11 is regarded as being inserted into the vane housing groove 3, and the process proceeds to step 4 to activate the actuator 20. The gauge unit 30 is further lowered by a predetermined stroke E2 at a predetermined high speed V2.

  In subsequent step 5, it is determined whether or not the load F detected by the load cell 17 exceeds a predetermined value F1.

  Here, it is assumed that when the load F detected by the load cell 17 exceeds the predetermined value F1, a processing defect or a dent or the like occurs in the vane receiving groove 3 of the rotor 1 and the sliding resistance of the inspection gauge 11 increases. Then, the process proceeds to step 7 to notify that there is an abnormality in the rotor 1.

  On the other hand, when the detected load F is smaller than the predetermined value F1, the rotor 1 is assumed to be normal, and the routine proceeds to step 6 to notify that the rotor 1 is normal.

  As shown in FIG. 1, the rotor 1 has twelve vane receiving grooves 3, whereas the inspection apparatus 10 has six inspection gauges 11, and the inspection gauges 11 are arranged every other vane receiving groove 3. To be inserted at the same time. The arrangement in which the inspection gauges 11 are inserted every other one of the vane receiving grooves 3 secures the interval between the gauge units 30 provided for each of the adjacent inspection gauges 11, and prevents them from interfering with each other. .

  Two inspection devices 10 are provided on the inspection line (not shown), and each inspection device 10 alternately inspects each vane receiving groove 3 of half of the rotor 1. Thereby, the tact time required to inspect one rotor 1 is halved.

  The inspection device 10 is not limited to this, and the inspection apparatus 10 is used when the number of the vane receiving grooves 3 formed in the rotor 1 is small, or when the outer diameter of the rotor 1 is large and the interval between the vane receiving grooves 3 is large. 3 may be provided, and the inspection gauges 11 may be inserted into all the vane receiving grooves 3 at the same time.

  As described above, the present embodiment is a method for inspecting the rotor 1 in which the plurality of vane receiving grooves 3 extend radially from the center of the rotating shaft of the rotor 1, and slidably fit in each vane receiving groove 3. A plurality of inspection gauges 11 are moved in the direction of the rotation axis of the rotor 1 and are simultaneously passed through the vane receiving grooves 3, and a sliding resistance acting on each inspection gauge 11 is measured to determine abnormality of the rotor 1. .

  Further, the present embodiment is an inspection apparatus for the rotor 1 in which the plurality of vane receiving grooves 3 extend radially from the center of the rotation shaft of the rotor 1, and the plurality of vane receiving grooves 3 are slidably fitted into the respective vane receiving grooves 3. An inspection gauge 11, an actuator 20 that moves each inspection gauge 11 in the direction of the rotation axis of the rotor 1 and simultaneously passes through each vane receiving groove 3, and a gauge unit 30 that individually measures the sliding resistance acting on each inspection gauge 11. The abnormality of the rotor 1 is determined based on the measured value of each gauge unit 30.

  Thereby, when the sliding resistance of the inspection gauge 11 is large, it is automatically determined that an abnormality such as a processing defect or a dent is generated in each vane housing groove 3, and labor saving is achieved.

  By moving the plurality of inspection gauges 11 in the direction of the rotation axis of the rotor 1 and simultaneously passing through the respective vane receiving grooves 3, the tact time required for inspecting one rotor 1 can be reduced.

  By moving the plurality of inspection gauges 11 in the direction of the rotation axis of the rotor 1, each inspection gauge 11 can be simultaneously moved by a single actuator 20, and the structure of the inspection apparatus can be simplified.

  On the other hand, when the plurality of inspection gauges 11 are moved in the radial direction of the rotor 1 and are simultaneously passed through the vane receiving grooves 3, it is necessary to provide a plurality of actuators, and the structure of the inspection apparatus is complicated. To do.

  In the present embodiment, the gauge unit 30 includes a floating mechanism 40 that supports the inspection gauge 11 with respect to the actuator 20 so as to be relatively displaceable.

  Based on the above configuration, even if there is a slight shift in the position of the vane receiving groove 3 of the rotor 1, the position of the inspection gauge 11 with respect to the vane receiving groove 3 is corrected via the floating mechanism 40. 3 is smoothly passed, and it is possible to accurately determine whether or not an abnormality such as a processing defect or a dent is generated in the vane receiving groove 3.

  In the present embodiment, the gauge unit 30 includes a bracket 31 that is moved by the actuator 20, a guide rod 33 that supports the inspection gauge 11 so as to be movable in the direction of the rotation axis of the rotor 1, and the guide rod. 33, a load cell 17 for detecting a load acting on the inspection gauge 11 through the inspection gauge 11, and a gauge tip insertion detecting means (photoelectric sensor) for detecting whether the gauge tip 11a of the inspection gauge 11 is inserted into the vane receiving groove 3 of the rotor 1. 18).

  Based on the above configuration, for example, when there is a large deviation in the shape or position of the vane receiving groove 3, the gauge tip 11 a of the inspection gauge 11 is brought into the vane receiving groove 3 of the rotor 1 by the gauge tip insertion detection means (photoelectric sensor 18). Since it is detected that it is not inserted, by stopping the operation of the actuator 20 at that time, it is possible to prevent the inspection gauge 11 and the rotor 1 from colliding with each other and damaging them.

  In the present embodiment, the inspection gauge 11 is configured to have a tapered gauge tip 11a.

  Based on the above configuration, even if there is a slight deviation in the position of the vane receiving groove 3 of the rotor 1, the taper gauge tip 11 a is smoothly inserted into the vane receiving groove 3, and the inspection gauge 11 with respect to the vane receiving groove 3 is inserted. The position is corrected. Thereby, the inspection gauge 11 can be smoothly passed through the vane receiving groove 3, and it can be accurately determined whether the vane receiving groove 3 has an abnormality such as a processing defect or a dent.

  The bracket 31 and the guide rod 33 are not limited to a configuration that moves in the vertical direction, and may be arranged to move in the horizontal direction, for example. In that case, for example, the inspection gauge 11 needs to be inserted into the vane housing groove 3 by the biasing force of the spring.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Rotor 3 Vane accommodating groove 10 Inspection apparatus 11 Inspection gauge 11a Gauge tip 15 Jig 17 Load cell 18 Photoelectric sensor 20 Actuator 30 Gauge unit 31 Bracket 32 Bush 33 Guide rod 34 Load receiving frame 36 Guide block 37 Guide groove 40 Floating mechanism

Claims (5)

A method for inspecting a rotor in which a plurality of vane receiving grooves extend radially from the center of the rotation axis of the rotor,
A plurality of inspection gauges slidably fitted in the respective vane receiving grooves, and a load acting through the inspection gauges that are moved in the rotational axis direction of the rotor by the actuator and simultaneously passed through the respective vane receiving grooves. Using a gauge unit comprising: a load cell to detect; and a gauge tip portion insertion detecting means for detecting whether or not a gauge tip portion of the inspection gauge is inserted into the vane housing groove,
Measure the sliding resistance acting on each inspection gauge individually,
An inspection method for a rotor, wherein abnormality of the rotor is determined based on a measurement value of the gauge unit . A rotor inspection apparatus in which a plurality of vane receiving grooves extend radially from the center of the rotation axis of the rotor,
A plurality of inspection gauges slidably fitted in the respective vane housing grooves;
Actuators that move each inspection gauge in the direction of the rotation axis of the rotor and simultaneously pass through the vane receiving grooves,
A gauge unit that individually measures the sliding resistance acting on each inspection gauge, and
The gauge unit is
A load cell for detecting a load acting via the inspection gauge;
A gauge tip insertion detection means for detecting whether or not the gauge tip of the inspection gauge is inserted into the vane receiving groove,
Inspection device of the rotor and judging an abnormality of said rotor based on the measured value of said gauge unit.   The rotor inspection apparatus according to claim 2, wherein the gauge unit includes a floating mechanism that supports an inspection gauge so as to be relatively displaceable with respect to the actuator. The gauge unit is
A bracket that is moved by the actuator;
A guide rod that supports the bracket so that the inspection gauge is movable in the direction of the rotation axis of the rotor;
4. The rotor inspection apparatus according to claim 2, wherein the load cell detects a load acting on the guide rod via the inspection gauge .   The rotor inspection apparatus according to claim 2, wherein the inspection gauge has a tapered gauge tip.

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