JP2012083187A - Test device for slide bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a test device for a slide bearing that can perform an exact test by automatically correcting uneven contact in a test shaft.SOLUTION: The test device for a slide bearing is configured to rotate the test shaft so as to be slightly swingable by a flexible joint in a vertical direction and to apply contact load of test metal and the test shaft by a pressing device in a state of the test metal brought into clinging contact with the test shaft. Accordingly, the test device is configured to rotate the test shaft along the test metal since the test shaft is flexibly held when the test metal is brought into clinging contact with the test shaft.

Description

  The present invention relates to a sliding bearing test apparatus. That is, the sliding bearing that receives the shaft on the sliding surface is used widely because it prevents the shaft and the bearing from being falsely attached (burned) by the hydraulic pressure generated by the lubrication, and has a simple structure. Since the product (PV value) of the bearing surface pressure (P) and the peripheral speed (V) of the bearing is a guideline for selecting the slide bearing material, it is extremely important to test the performance of this slide bearing. is there. The present invention relates to a test apparatus that knows the PV value of a sliding bearing.

Technology background

  Conventionally, there has been an apparatus disclosed in Patent Document 1 as a sliding bearing test apparatus.

  Hereinafter, Patent Document 1 will be described with reference to FIG. 1 of the publication of Patent Document 1 and its reference in parentheses, and is not shown in the present application.

  As shown in FIG. 1, the test apparatus of Patent Document 1 is provided with two pedestals (12) and pedestals (13) provided at the upper part of a base (11) with slits (intervals) (16), and stacked. A columnar member (2) that passes through the slit (16) and is rotated by an electric motor is provided in (13), and a bearing holding member that allows the bearing (3) to run along the columnar member (2) in the slit (16) ( 17) and a vibration device (20) for applying vibration to the bearing holding member is provided.

  In the test apparatus disclosed in Patent Document 1, the bearing holding member (20) is used as the bearing holding member (20) in FIG. 1 in which the bearing (3) is placed along the columnar member (2) with the bearing holding member (17). The PV value of the bearing (3) is to be measured by rotating the columnar member (2) while applying vibration (load) to 17).

  The test apparatus disclosed in Patent Document 1 is configured to hold the columnar member (2) rotatably in the horizontal direction and to place the columnar member (2) along the bearing (3) by the bearing holding member (17). Therefore, since the bearing (3) is arranged along the longitudinal direction of the fixed columnar member (2) with a width in the longitudinal direction, it is easy to generate a single contact. Further, since the one-piece contact is known from the wear state of the bearing (3) after the test is completed, it is easy to perform the test while the one-piece contact is generated between the columnar member (2) and the bearing (3). And even if the test is performed with the piece hitting, the test result becomes very inaccurate, resulting in an unusable PV value. In order to solve this point, a plurality of load cells (118A to 118C) are arranged in the longitudinal direction of the bearing (3) with a width in the longitudinal direction of the columnar member (2), and the temperature of the load cells (118A to 118C) is increased. In this configuration, the bearing holding member is computer-controlled by the tilt adjustment mechanism (140) so as to be uniform.

JP 2006-275633 A

  Since the test apparatus of Patent Document 1 described above has the columnar member (2) that is rotated by an electric motor installed horizontally, the columnar member (2) and the bearing (3) come into contact with each other. This one-sided contact is attempted to be solved by controlling the tilt adjustment mechanism (140) with a computer. However, there is a problem that the one-sided contact cannot be reliably eliminated due to an operation delay of the tilt adjustment mechanism (140) for canceling the one-sided contact. It is what you have.

  In the present invention, by incorporating a mechanism that does not generate a piece contact in a sliding bearing test apparatus, it is possible to perform an accurate test by automatically correcting the piece contact instead of detecting and correcting the occurrence of the piece contact. An apparatus that can be used is provided.

  According to a first aspect of the present invention, there is provided a sliding bearing test apparatus comprising: a machine base having an upper machine base provided on an upper part of a lower machine base; a torsion bar having a lower part fixed to the lower machine base; and an upper part of the upper machine base. A fixed bearing that is arranged on substantially the same axis as the shaft center of the torsion bar and that holds a rotating shaft that is driven by a power source, and is fixed to the rotating shaft that the bearing holds and can swing, and a test shaft is fixed. A shaft coupling, a test machine base that is rotatably supported on an upper part of the lower machine base, an upper part of the torsion bar is fixed, and a test chamber in which the test shaft is located in a central part thereof is formed, and the test machine base A pressing device that has an output end that faces the test chamber and intersects the test shaft and is fixed to the testing machine table, and passes through the testing machine table at a position facing the output end of the pressing device. Coming to the test room A force receiving device having a force receiving end in a direction intersecting with the test machine, and a holding member for bringing a test metal along the test shaft, and disposed between the pressing device and the test shaft. A holding device comprising a pressing side holding device and a force receiving side holding device provided with a holding member for placing a test metal along the test shaft and disposed between the force receiving devices, To do.

      A sliding bearing test apparatus according to a second invention is characterized in that the pressing device is a hydraulic cylinder.

      A sliding bearing test apparatus according to a third invention is characterized in that the force receiving device includes a load cell therein.

    A sliding bearing test apparatus according to a fourth aspect of the invention is characterized in that the pressing side holding device and the pressure side holding device have detachable holding claws for holding a test metal.

  The sliding bearing test apparatus according to the present invention is configured so that the test shaft is rotated in a vertical direction so that it can be slightly swung by a flexible joint, and the test shaft is tested by a pressing device in a state where the test metal is held so as to hold the test metal. Since the contact load between the metal and the test shaft is applied, the test shaft that is brought into contact with the test metal so as to hold it has a degree of freedom in the direction in which the contact load is applied, so even if the test metal tilts in the longitudinal direction. Since the test shaft is also tilted, it is possible to avoid contact with each other.

The front view containing the partial cross section of embodiment of this invention. 1 is an enlarged view of the main part of FIG. 1 is an enlarged plan view of the main part of FIG. Top view of holding device Cross section of holding device

  In FIG. 1, which is a front view including a partial cross section of an embodiment of the present invention, and FIG. 2, which is a partially enlarged view thereof, a sliding bearing test device 15 is parallel to a lower horizontal beam 16 and an upper portion of the horizontal beam 16. A machine base 13 having a lower machine base 10 provided with a horizontal rail 17 and an upper machine base 11 provided with a drive source (not shown) on the lower machine base 10 is provided.

  The lower end 21 of the torsion bar 20 and the lower end 24 of the cylindrical structure 22 are fixed to the central portion of the horizontal rail 16 provided at the lower part of the lower machine base 10 of the machine base 13. As described above, the lower end 24 of the cylindrical structure 22 is attached to the horizontal beam 16, and the upper end 23 is fixed to the upper horizontal beam 17 provided in parallel to the horizontal beam 16. It is fixed to.

  The cylindrical structure 22 includes a cylindrical recess 25 inside an upper end 23 portion attached to the horizontal rail 17, and a cylinder provided at the lower end of the test machine table 30 inside the cylindrical recess 25. The support portion 31 is rotatably held by a thrust bearing 32.

  A cylindrical support portion 31 provided at the lower end of the test machine base 30 is provided with a support member 28 that is rotatably provided at the lower end and the upper portion of the cylindrical structure 22 and holds the upper end of the torsion bar 20. 34 is connected.

  As described above, since the cylindrical support portion 31 of the test machine base 30 is configured to be rotatable, the relationship between the test machine base 30 and the cylindrical structure 22 is torsion when a rotational moment acts on the test machine base 30. Twist the bar 20. Therefore, when the twisted amount of the torsion bar 20 is electrically converted and measured, the rotational load acting on the test machine base 30 can be measured (the test metals 61 and 62 and the test shaft 40 are burned in).

  A bearing 50 fixed to the upper part of the upper machine base 11 supports a rotating shaft 27 that rotates on an axis substantially coincident with the axis 26 of the torsion bar 20. The rotary shaft 27 is provided with a flexible joint 28 at its lower end.

  At the lower end of the flexible joint 28, a test shaft 40 is installed in the test chamber 36 of the test machine base 30. The axes of the rotary shaft 27, the flexible joint 28, and the test shaft 40 are substantially the same as the axis 26 of the torsion bar 20. The axis 26 substantially coincides with the center of the test chamber 31 of the test machine base 30 as shown in FIG. That is, the various components rotated by the drive source have a structure that rotates around the axis 26 of the torsion bar 20.

  FIG. 3 shows an outline of the arrangement relationship, and the pressing device 41 and force receiving device 51 shown in detail in FIG. 2 are arranged along the axis 18 in the direction of the horizontal rail 17 of the test machine base 30, and the main body is tested. It is fixed to the side surface of the machine base 30. Then, the output end of the pressing device 41 and the force receiving end 53 of the force receiving device 51 are in positions facing each other. Therefore, the output of the pressing device 41 has a structure that can be accurately received by the force receiving device 51.

  The pressing device 41 is constituted by a hydraulic cylinder, and the pressing force generated by the hydraulic pressure applied to the pressure chamber 44 by the piston 42 is output from the output end 47 to the outside from the rod 43. Further, when oil pressure acts on the pressure chamber 45, the rod 43 moves backward. The force receiving device 51 arranged at a position facing the pressing device 41 has a structure including a rod 54 slidably held by the main body 52 and having a force receiving end 53 at the tip thereof. In this configuration, the pressing force acting on the force receiving end 53 is transmitted to the load cell 55 via the rod 43.

  A switching valve 46 is provided in the main body of the pressing device 41, and pressure oil is supplied to and discharged from the pressure chamber 44 or the pressure chamber 45 of the pressing device 41 by the switching valve 46. The heater 76 provided in the test chamber 31 heats the lubricating oil in the test chamber 31, and the temperature of the lubricating oil that keeps the lubricating oil at an appropriate temperature is measured by a thermometer 77. Furthermore, the stopper 48 provided in the pressing device 41 is tested when the torsion bar 20 breaks due to excessive rotation of the test machine base 30 (excessive rotation generated by seizure of the test shaft 40, the test metal 61, and the test metal 62). The rotation of the machine base 30 is prevented.

  The holding device 60 that holds the test metals 61 and 62 includes a pressing side holding device 63 that holds the test metal 61 between the test shaft 40 and the output end 47 of the pressing device 41, and the test shaft 40. 40 and a pressure receiving side holding device 64 that holds the test metal 62 between the force receiving end 53 and runs along the test shaft 40, and the pressing side holding device 63 and the output end 47 of the pressing device 41 are The pin 65 is connected and positioned. Similarly, the pin 65 is connected and positioned to the force receiving end 53 of the pressure receiving side holding device 64 and has a function of being along the test shaft 40.

  Holding claws 71 and 72 are detachably provided with bolts at both ends of the pressing side holding device 63 of the holding device 60, and the test metal 61 is attached to the pressing side holding device 63 by the holding claws 7172. Similarly, holding claws 73 and 74 are detachably provided at both ends of the pressure receiving side holding device 64 with bolts, and the test metal 62 is attached to the pressure side holding device 64 by the holding claws 73 and 74.

  As shown in FIG. 5, the holding device 60 has a hole reaching the test metal 61 at an appropriate position not intersecting with the holding claws 71 and 72, and a thermometer 76 that contacts the test metal 61 is provided in the hole 75. is there. The pressure receiving side holding device 64 has the same structure and is configured to always measure the temperature of the test metal 62.

Operation Next, the operation of the above-described embodiment will be described. In order to place the test metals 61 and 62 along the test shaft 40 as shown in FIG. 1, the working pressure oil is supplied to the pressure chamber 45 of the pressing device 41 of the sliding bearing test device 15, and the rod 43 is moved backward to test the test shaft 40. And the test chamber 31 is left empty. Next, after removing the holding claws 71 and 72 of the pressing side holding device 63 of the holding device 60 and mounting the test metal 61, the holding claws 71 and 72 are fastened and the test metal 61 is fixed to the pressing side holding device 63. Similarly, the test metal 62 is attached to the pressure receiving side holding device 64, and the test metals 61 and 62 are attached to the holding device 60.

  Next, the pressure receiving side holding device 64 is first attached to the force receiving end 53, the test shaft 40 is then attached to the flexible joint 28, and the pressing side holding device 63 is attached to the output end 47. . In this way, the holding device 60 and the test shaft 40 are set as shown in FIG. Next, pressure oil is supplied to the pressure chamber 44 of the pressing device 41, and the pressing side holding device 63 and the pressure receiving side holding device 64 cause the test metal 62 and the test metal 62 to lie on the test shaft 40. At this time, even if the axes of the test metal 61 and the test metal 62 are inclined with respect to the axis of the test shaft 40, the axis of the test shaft 40 is inclined by the flexible joint 28. Then, the test chamber 31 is filled with lubricating oil and kept at a predetermined temperature. At this time, a slight misalignment of the shaft center occurs between the test shaft 40 and the holding device 60, but the flexible joint 28 can prevent one-piece contact due to misalignment.

  In the situation as shown in FIG. 1 as described above, hydraulic pressure is applied to the pressure chamber 44 of the pressing device 41 while rotating the test shaft 40 via the rotating shaft 27 by the drive source, and the output end 47 becomes the test shaft. The pressing side holding device 63 is pressed to 40. This pressing force to the pressing side holding device 63 is received by the force receiving end 53 of the force receiving device 51 and the rod 54 from the test shaft 40 via the pressure receiving side holding device 64, and the tightening force is measured by the load cell 55. The

  Since the pressing device 41 and the force receiving device 51 are fixed against the test machine base 30, the output of the pressing device 41 only acts as an internal tension through the test shaft 40. This internal tension acts as a force for turning the test machine base 30 and turns the torsion bar 20 provided at the lower part of the test machine base 30. Therefore, the contact pressure between the test shaft 40, the test metal 61, and the test metal 62 can be measured as the amount of change of the torsion bar 20.

  Moreover, the temperature which rises by pressing the test metals 61 and 62 against the test shaft 40 is measured by a thermometer 76 provided in the pressing side holding devices 63 and 64.

  In this way, the pressing force acting on the test metals 61 and 62 is measured by the load cell 55, and the degree of seizure between the test shaft 40 and the test metals 61 and 62 is measured by the degree of twist of the torsion bar 20. , 62 is constantly measured by a thermometer 76, and the temperature of the lubricating oil is measured by a thermometer 77.

  Therefore, in the sliding bearing test apparatus of this embodiment, the relationship among the rotational speed of the test shaft 40, the temperatures of the test metals 61 and 62, the pressing force, the degree of seizure, and the temperature of the lubricating oil can be measured. As a specific example, in order to know the limit values of the test metal 61 and the test metal 62, the torsion bar 20 detects the maximum twist (when the test shaft 40 and the test metals 61 and 62 are burned). It is possible to know the temperature of the lubricating oil, the temperature of the test metals 61 and 62, the number of rotations of the rotating shaft 27, and the pressing force to the test metals 61 and 62, and the value is the limit of the sliding bearing. The PV value which is the product of the surface pressure (P) and the rotational speed (V) at this time can be measured.

DESCRIPTION OF SYMBOLS 10 Lower machine stand 11 Upper machine stand 13 Machine stand 15 Sliding bearing test device 20 Torsion bar 30 Test machine stand 31 Test chamber 36 Test chamber 40 Test shaft 41 Press device 51 Power receiving device 55 Load cell 60 Holding device 61 Test metal 62 Test Metal 63 Pressing side holding device 64 Pressure receiving side holding devices 71 to 74 Holding claw 76 Thermometer

Claims (4)

A machine base with an upper machine base above the lower machine base;
A torsion bar whose lower part is fixed to the lower machine base,
A bearing that is fixed to the upper part of the upper machine base and that is arranged on substantially the same axis as the shaft center of the torsion bar and holds a rotating shaft driven by a power source;
A shaft coupling fixed to a rotating shaft held by the bearing and capable of swinging and having a test shaft fixed thereto;
A test stand that is rotatably supported on an upper portion of the lower stand and that forms a test chamber in which an upper portion of the torsion bar is fixed and the test shaft is located in a central portion of the torsion bar;
A pressing device that passes through the test machine table and faces the test chamber and has an output end in a direction intersecting the test shaft, and is fixed to the test machine table;
A force receiving device that has a force receiving end in a direction that passes through the test machine table at a position facing the output end of the pressing device, crosses the test shaft, and is fixed to the test machine table;
A holding member for holding a test metal along the test shaft; a pressing side holding device arranged between the pressing device and the test shaft; and a holding member for holding the test metal along the test shaft. A holding device configured with a force-receiving-side holding device arranged between
A sliding bearing testing device characterized by comprising:   2. The sliding bearing test apparatus according to claim 1, wherein the pressing device is a hydraulic cylinder.   3. The sliding bearing test device according to claim 1, wherein the force receiving device includes a load cell therein.   4. The sliding bearing test device according to claim 1, wherein the pressing side holding device and the pressure side holding device include a detachable holding claw for holding a test metal. .

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