CN216955144U - High-speed railway bearing testing machine - Google Patents

Abstract

The utility model relates to a high-speed rail bearing testing machine which comprises a machine body, a main shaft driving motor, a loading seat, an axial loading mechanism and a radial loading mechanism, wherein the main shaft driving motor is arranged on the machine body; the tested bearing is arranged on the main shaft and is arranged in the loading seat, the main shaft provided with the tested bearing is driven to rotate at a high speed by the main shaft driving motor, the loading seat provided with the tested bearing is respectively subjected to axial loading and radial loading by the axial loading mechanism and the radial loading mechanism, the use condition of the high-speed rail bearing can be simulated, and the performance test of the high-speed rail bearing is met.

Description

High-speed railway bearing testing machine

Technical Field

The utility model relates to the technical field of bearing testing, in particular to a high-speed rail bearing testing machine.

Background

With the development of high-speed rails, the performance requirements of bearings used in the high-speed rails are higher and higher, the performance test of the bearings used in the high-speed rails is particularly important, the existing bearing test device cannot meet the performance test requirements of the bearings used in the high-speed rails, and particularly cannot analyze and judge failure reasons of the bearings used in the high-speed rails under specific conditions.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a high-speed rail bearing testing machine which can simulate the use condition of a high-speed rail bearing and meet the performance test of the high-speed rail bearing.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a high-speed rail bearing testing machine comprises: the device comprises a machine body, a main shaft driving motor, a loading seat, an axial loading mechanism and a radial loading mechanism; the main shaft is rotatably arranged on the machine body through two main shaft fixing seats arranged at intervals, a main shaft driving motor is positioned in the machine body below the main shaft, and the main shaft driving motor is in driving connection with the main shaft through a belt; the two loading seats are respectively positioned at two ends of the main shaft, a measured bearing is arranged in each loading seat, and the inner ring of each measured bearing is sleeved on the main shaft; the axial loading mechanism is arranged on the machine body, positioned outside the two loading seats, connected with the two loading seats and used for axially loading the bearing to be tested; the two sets of radial loading mechanisms are the same in structure, and are correspondingly arranged below the two loading seats and respectively connected with the two loading seats for radially loading the measured bearing.

Further, the axial loading mechanism includes: the loading frame comprises two guide shafts arranged axially and two fixed beams arranged radially; an axial loading hydraulic cylinder axially arranged on one of the fixed beams; and a second load lever assembly axially disposed on the other of the fixed beams; the piston rod of the axial loading hydraulic cylinder is connected with a loading seat arranged at one end of the main shaft, the second loading rod component is connected with the loading seat arranged at the other end of the main shaft, and the two guide shafts are horizontally arranged on the machine body in a sliding mode through the guide sleeves.

Furthermore, each guide shaft is formed by connecting two optical shafts into a whole through a connecting flange, a piston rod of the axial loading hydraulic cylinder is connected with a front end cover of a loading seat positioned at one end of the main shaft through a first loading rod assembly, and a first pressure sensor is arranged on the first loading rod assembly; the first loading rod assembly comprises a first connecting sleeve, a nut sleeve and a spherical short screw rod, one end of the first connecting sleeve is connected with a piston rod of the axial loading hydraulic cylinder, the other end of the first connecting sleeve is connected with one end of the nut sleeve, the other end of the nut sleeve is connected with a screw rod part of the spherical short screw rod, a ball head of the spherical short screw rod is arranged on a front end cover of a loading seat at one end of the main shaft through a spherical seat and a spherical cover, and the first pressure sensor is arranged between the first connecting sleeve and the nut sleeve; the second loading rod assembly comprises a second connecting sleeve and a spherical long screw rod, the second connecting sleeve is arranged on the fixed beam far away from one side of the loading hydraulic cylinder, the screw thread of the spherical long screw rod is screwed in the second connecting sleeve, and the ball head of the spherical long screw rod is arranged on the front end cover of the loading seat at the other end of the main shaft through a spherical seat and a spherical cover.

Furthermore, each set of radial loading mechanism comprises a radial loading hydraulic cylinder, a cylinder body of the radial loading hydraulic cylinder is vertically arranged, and a piston rod of the radial loading hydraulic cylinder is connected with the loading seat.

Furthermore, a piston rod of each set of radial loading hydraulic cylinder is connected with the loading seat through a loading block and two connecting rods, the piston rod of each radial loading hydraulic cylinder is connected with the loading block through a transition joint, a second pressure sensor is arranged on the transition joint, one end of each connecting rod is hinged to two ends of the loading block, and the other end of each connecting rod is hinged to two corresponding lugs on the loading seat.

Further, every set radial loading mechanism still includes axial displacement mechanism, axial displacement mechanism include along the axial set up the slide rail, with slide rail sliding connection's fixing base, setting limiting plate and the regulation pole in the slide rail outside, adjust the parallel main shaft axial setting of pole, adjust the rotatable setting of pole one end on the fixing base, the other end passes the limiting plate and is located the limiting plate outside, be provided with the external screw thread on the regulation pole, adjust the pole and connect with the limiting plate screw thread soon, the cylinder body of radial loading pneumatic cylinder is fixed on the fixing base.

Further, the spindle driving motor is adjustably mounted on the ground through the motor mounting plate and mounting bolts mounted at four corners of the motor mounting plate, the lower end of each mounting bolt is fixed on the ground, the upper end of each mounting bolt is fixed to the motor mounting plate in a clamping mode through two clamping nuts, and the spindle driving motor is fixed to the motor mounting plate through bolts.

Furthermore, an inner ring of a tested bearing in each loading seat is fixedly arranged on the main shaft, the inner ring of the tested bearing is in interference fit with the shaft end of the main shaft, a limiting shaft shoulder is arranged at the shaft end of the main shaft, a rear stop piece is arranged between the inner ring of the tested bearing and the limiting shaft shoulder, a gland is arranged at the outer end of the inner ring of the tested bearing, the gland is fixed on the end face of the main shaft through bolts, and the gland is matched with the limiting shaft shoulder to complete axial limitation on the inner ring of the tested bearing; the outer ring of a tested bearing in each loading seat is fixedly arranged in the loading seat, the outer ring of the tested bearing is limited between the front end cover and the rear end cover of the loading seat, the rear end cover of the loading seat is sleeved on the main shaft, an axial flange on the rear end cover of the loading seat is abutted to the end face of the outer ring of the tested bearing, and a spacer sleeve is arranged between the front end cover of the loading seat and the outer ring of the tested bearing.

Furthermore, each mounting hole in the main shaft fixing seat is internally provided with a mounting bearing, the inner ring of each mounting bearing is sleeved on the main shaft, the output shaft end of the main shaft driving motor is provided with a driving belt wheel, the main shaft is provided with two driven belt wheels, the driven belt wheels are positioned between the two main shaft fixing seats, the belt is mounted on the driving belt wheel and the driven belt wheels, and the main shaft fixing seats are provided with a lubricating mechanism for lubricating the mounting bearings.

The axial loading mechanism, the radial loading mechanism and the spindle driving motor are controlled according to the information, and the control system is arranged on the outer side of the machine body.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a high-speed rail bearing testing machine which comprises a machine body, a main shaft driving motor, a loading seat, an axial loading mechanism and a radial loading mechanism, wherein the main shaft driving motor is arranged on the machine body; the tested bearing is arranged on the main shaft and is arranged in the loading seat, the main shaft provided with the tested bearing is driven to rotate at a high speed by the main shaft driving motor, the loading seat provided with the tested bearing is respectively subjected to axial loading and radial loading by the axial loading mechanism and the radial loading mechanism, the use condition of the high-speed rail bearing can be simulated, and the performance test of the high-speed rail bearing is met.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a spindle and a spindle driving motor according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a loading seat according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an axial loading mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 along line A-A;

fig. 6 is a schematic structural diagram of a radial loading mechanism according to an embodiment of the present invention.

In the figure: 100. the device comprises a machine body, 200, a spindle, 210, a spindle fixing seat, 220, a mounting bearing, 230, a limiting shaft shoulder, 240, a rear stopper, 300, a spindle driving motor, 310, a motor mounting plate, 320, a mounting bolt, 330, a clamping nut, 400, a loading seat, 410, a front end cover, 420, a rear end cover, 430, a spacer sleeve, 440, a lug, 450, a temperature sensor, 460, a speed sensor, 470, a gland, 500, an axial loading mechanism, 510, a guide shaft, 511, an optical axis, 520, a fixed beam, 530, an axial loading hydraulic cylinder, 540, a first loading rod assembly, a first connecting sleeve, 542, a nut sleeve, 543, a spherical short screw rod, 544, a spherical seat, 545, a spherical cover, 546, a positioning pin, 550, a second loading rod assembly, 551, a second connecting sleeve, 552, a spherical long screw rod, 541, a locking nut, 560, a first pressure sensor, 600, a radial loading mechanism, 610, a spherical cover, a mounting bolt, a clamping nut, a clamping device, a clamping, The device comprises a radial loading hydraulic cylinder, a loading block, a connecting rod, a second pressure sensor, a sliding rail, a fixed seat, a limiting plate, a regulating rod, a sliding rail, a sliding block, a limiting plate, a sliding rod, a regulating rod, a sliding joint, a transition joint, a sliding bearing, a bearing to be measured, 800, a belt, 810, a driving pulley, 820, a driven pulley, 900 and a control valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Example 1

As shown in fig. 1-6, a high-speed rail bearing testing machine is used for testing the performance of a high-speed rail bearing, and as shown in fig. 1, the high-speed rail bearing testing machine includes a machine body 100, a main shaft 200, a main shaft driving motor 300, a loading seat 400, an axial loading mechanism 500, and a radial loading mechanism 600; the machine body 100 is fixed on the ground through a ground bolt, plays a role of bearing and supporting, and is mainly used for bearing parts such as the main shaft 200, the axial loading mechanism 500, the radial loading mechanism 600 and the like.

As shown in fig. 2, the main shaft 200 is rotatably mounted on the machine body 100 through two main shaft fixing seats 210 arranged at intervals, specifically, a mounting bearing 220 is mounted in a mounting hole on each main shaft fixing seat 210, an inner ring of the mounting bearing 220 is sleeved on the main shaft 200, and a lubricating mechanism is arranged on the main shaft fixing seats 210 and used for lubricating the mounting bearing 220; the lubricating mechanism comprises an oil tank arranged in the machine body 100 and a control valve 900 arranged on the main shaft fixing seat 210, the oil tank is connected with the control valve 900 through a pipeline, and the control valve 900 is connected with an oil path in the main shaft fixing seat 210.

The spindle driving motor 300 is located in the machine body 100 below the spindle 200, the spindle driving motor 300 is installed on the ground, the spindle driving motor 300 is in driving connection with the spindle 200 through a belt 800, specifically, an output shaft end of the spindle driving motor 300 is provided with a driving pulley 810, a driven pulley 820 is correspondingly arranged on the spindle 200, the driven pulley 820 is located between two spindle fixing seats 210, the belt 800 is installed on the driving pulley 810 and the driven pulley 820, the spindle driving motor 300 in this embodiment example is adjustably installed on the ground through a motor mounting plate 310 and mounting bolts 320 installed at four corners of the motor mounting plate 310, the lower ends of the mounting bolts 320 are fixed on the ground, the upper ends of the mounting plates 310 are clamped and fixed through two clamping nuts 330, and the spindle driving motor 300 is fixed on the motor mounting plate 310 through bolts. The spindle driving motor 300 in this embodiment is a variable frequency speed-adjustable motor, and can drive the spindle 200 to rotate at 2000rpm, which corresponds to a speed of 325 KM/h.

When the belt tightening device is used, the two clamping nuts 330 at the upper end of the mounting bolt 320 can be adjusted to adjust the height position of the spindle driving motor 300, so that the tightness of the belt 800 can be adjusted conveniently. It should be noted that, the above technical solution helps the motor output of the spindle driving motor 300 to be stable, thereby ensuring that the spindle 200 rotates stably.

As shown in fig. 3, two loading seats 400 are respectively located at two ends of the spindle 200, a measured bearing 700 is arranged in each loading seat 400, an inner ring of the measured bearing 700 is sleeved on the spindle 200, each loading seat 400 of this embodiment includes a front end cover 410 at a side far from the spindle 200, a rear end cover 420 at a side close to the spindle 200, and two lugs 440 symmetrically arranged on an outer circumferential surface of the loading seat 400, an inner ring of the measured bearing 700 in each loading seat 400 is fixedly arranged on the spindle 200, specifically, the inner ring of the measured bearing 700 is in interference fit with a shaft end of the spindle 200, the shaft end of the spindle 200 is provided with a limiting shoulder 230, a rear stopper 240 is arranged between the inner ring of the measured bearing 700 and the limiting shoulder 230, an outer end of the inner ring of the measured bearing 700 is provided with a gland 470, the gland 470 is fixed on an end surface of the spindle 200 by bolts, the gland 470 is matched with the limiting shoulder 230, so as to axially limit the inner ring of the measured bearing 700, the gland 470 is fixed on the end face of the main shaft 200 through bolts, it should be noted that the inner ring of the measured bearing 700 can also directly abut against the position-limiting shaft shoulder 230, and the gland 470 can also be screwed with the shaft end thread of the main shaft 200; in this embodiment, the outer ring of the measured bearing 700 in each loading seat 400 is fixedly disposed in the loading seat 400, specifically, the outer ring of the measured bearing 700 is limited between the front end cover 410 and the rear end cover 420 of the loading seat 400, the rear end cover 420 of the loading seat 400 is sleeved on the spindle 200, an axial flange on the rear end cover 420 of the loading seat 400 abuts against the end surface of the outer ring of the measured bearing 700, a spacer 430 is disposed between the front end cover 410 of the loading seat 400 and the outer ring of the measured bearing 700, one end of the spacer 430 abuts against the front end cover 410 of the loading seat 400, and the other end abuts against the end surface of the outer ring of the measured bearing 700.

Each of the loaders 400 of the present embodiment is provided with a temperature sensor 450 and a speed sensor 460 for detecting the temperature and the rotational speed of the bearing 700 to be measured.

As shown in fig. 4, the axial loading mechanism 500 is disposed on the machine body 100, located outside the two loading seats 400, and connected to the two loading seats 400, for axially loading the tested bearing 700, and the axial loading mechanism 500 of this embodiment includes: the loading frame is a rectangular loading frame consisting of two guide shafts 510 arranged axially and two fixed beams 520 arranged radially; an axial loading hydraulic cylinder 530 axially disposed on one of the fixed beams 520; and a second load bar assembly 550 disposed axially on the other fixed beam 520; the piston rod of the axial loading hydraulic cylinder 530 is connected to the loading base 400 disposed at one end of the main shaft 200, the second loading rod assembly 550 is connected to the loading base 400 disposed at the other end of the main shaft 200, and the two guide shafts 510 are slidably and horizontally mounted on the machine body 100 through guide sleeves. It should be noted that, in the above technical solution, the axial loading of the two measured bearings 700 is realized by one axial loading hydraulic cylinder 530. When the axial loading hydraulic cylinder 530 is used, when the front cavity (rod cavity) of the axial loading hydraulic cylinder 530 is fed with oil, the measured bearing 700 is pulled, and when the rear cavity (rodless cavity) of the axial loading hydraulic cylinder 530 is fed with oil, the measured bearing 700 is pressed.

As shown in fig. 5, in the embodiment, each guide shaft 510 is formed by connecting two optical axes 511 through a connecting flange, and it should be noted that the problem that the transmission of force of the guide shaft 510 is unstable due to an overlong length can be solved by connecting the two optical axes 511 through the connecting flange to form one guide shaft 510, so that the transmission of force can be well ensured, and the processing and installation are also facilitated. A piston rod of the axial loading hydraulic cylinder 530 is connected with the front end cover 410 of the loading seat 400 at one end of the main shaft 200 through a first loading rod assembly 540, and a first pressure sensor 560 is arranged on the first loading rod assembly 540; the first loading rod assembly 540 comprises a first connecting sleeve 541, a nut sleeve 542 and a short spherical screw 543, wherein one end of the first connecting sleeve 541 is in threaded connection with a piston rod of the axial loading hydraulic cylinder 530, the other end of the first connecting sleeve 541 is connected with one end of the nut sleeve 542, the other end of the nut sleeve 542 is in threaded connection with a screw portion of the short spherical screw 543, a ball head of the short spherical screw 543 is mounted on the front end cap 410 of the loading base 400 through a spherical base 544 and a spherical cover 545, a first pressure sensor 560 is arranged between the first connecting sleeve 541 and the nut sleeve 542, wherein the diameter of the ball head of the short spherical screw 543 is larger than the diameter of the screw head of the short spherical screw 543, a through hole is arranged in the middle of the spherical base 544, the spherical base 544 and the spherical cover 545 are mutually buckled to form a spherical cavity, the spherical cover 545 is fixed on the front end cap 410 of the loading base 400, and the screw of the short spherical screw 543 passes through hole on the spherical base 544, the ball head of the short spherical screw 543 is clamped in a spherical cavity formed by the spherical seat 544 and the spherical cover 545, the spherical seat 544 is fixed on the spherical cover 545 through bolts, and the ball head of the short spherical screw 543 is attached to the inner wall of the spherical cavity and can slide relative to the inner wall of the spherical cavity, so that the force exerted on the ball head by the piston rod of the axial loading hydraulic cylinder 530 is consistent with the axis of the main shaft 200, and the deflection resistance is improved. In order to prevent the short spherical screw 543 and the nut sleeve 542 from loosening, a positioning pin 546 is further disposed between the screw of the short spherical screw 543 and the nut sleeve 542, and the positioning pin 546 is inserted into a corresponding pin hole of the nut sleeve 542 and the short spherical screw 543. The ball head of the spherical short screw 543 is connected with the front end cover 410 of the loading seat 400, so that the axial loading hydraulic cylinder 530 is favorable for providing stable axial loading force for the loading seat 400.

The second loading rod assembly 550 comprises a second connecting sleeve 551 and a spherical long screw 552, the second connecting sleeve 551 is arranged on the fixed beam 520 at the side far away from the axial loading hydraulic cylinder 530, the screw thread of the spherical long screw 552 is screwed in the second connecting sleeve 551, and the ball head of the spherical long screw 552 is installed on the front end cover 410 of the loading seat 400 at the other end of the main shaft 200 through a spherical seat and a spherical cover; the diameter of the ball head of the spherical long screw 552 is larger than that of the screw of the spherical long screw 552, a through hole is formed in the middle of the spherical seat, the spherical seat and the spherical cover are mutually buckled to form a spherical cavity, the spherical cover is fixed on the front end cover 410 of the loading seat 400, the screw of the spherical long screw 552 passes through the through hole in the spherical seat, the ball head of the spherical long screw 552 is clamped in the spherical cavity formed by the spherical seat 544 and the spherical cover 545, and the spherical seat is fixed on the spherical cover through a bolt. The ball head of the long spherical screw 552 is attached to the inner wall of the spherical cavity and can slide relative to the inner wall of the spherical cavity, so that the force exerted on the ball head by the piston rod of the axial loading hydraulic cylinder 530 is consistent with the axis of the main shaft 200, and the deflection resistance is improved. The ball head of the ball-shaped long screw 552 is connected with the front end cover 410 of the loading seat 400, so that the axial loading hydraulic cylinder 530 is favorable for providing stable axial loading force for the loading seat 400. The spherical long screw 552 is screwed with the second connecting sleeve 551, so that the extending length of the spherical long screw 552 can be adjusted conveniently, and the disassembly and the assembly are convenient. The screw of the ball-shaped long screw 552 is further provided with a lock nut 553, the lock nut 553 is located outside the second connecting sleeve 551, and the lock nut 553 abuts against the second connecting sleeve 551 after being locked, so as to fasten the ball-shaped long screw 552 in the second connecting sleeve 551. It should be noted that the ball head portion of the ball-shaped short screw 543 and the ball-shaped long screw 552 in this embodiment are the same in size. The spherical long screw 552 and the spherical short screw 543 are used in a matched mode, so that the piston rod of the axial loading hydraulic cylinder 530 is prevented from applying axial loading force to deflect, and deflection resistance is improved.

As shown in fig. 6, the radial loading mechanisms 600 are two sets of mechanisms with the same structure, are correspondingly disposed below the two loading seats 400, and are respectively connected to the two loading seats 400 for radially loading the measured bearing 700, each set of radial loading mechanism 600 includes a radial loading hydraulic cylinder 610, a cylinder body of the radial loading hydraulic cylinder 610 is vertically disposed, and a piston rod of the radial loading hydraulic cylinder 610 is connected to the loading seat 400.

The piston rod of each set of radial loading hydraulic cylinder 610 in this embodiment is connected to the corresponding loading base 400 through a loading block 620 and two connecting rods 630, and a second pressure sensor 640 is further disposed between the piston rod of each set of radial loading hydraulic cylinder 610 and the loading block 620. Specifically, a piston rod of the radial loading hydraulic cylinder 610 is connected with the loading block 620 through a transition joint 690, a second pressure sensor 640 is arranged on the transition joint 690, one end of each of two connecting rods 630 is hinged to two ends of the loading block 620, and the other end of each of the two connecting rods 630 is hinged to two corresponding lugs 440 on the loading seat 400. It should be noted that the above solution helps to provide smooth radial loading force by hinging the loading block 620 with the loading seat 400 through two connecting rods 630. In use, the radial loading hydraulic cylinders 610 below each loading seat 400 provide a radial loading force to the loading seats 400 through extension of the piston rods.

Every set of radial loading mechanism 600 in this embodiment still includes axial displacement mechanism for along the radial loading pneumatic cylinder 610 of axial translation, axial displacement mechanism includes along the axial setting at the slide rail 650 of organism 100 bottom, with slide rail 650 sliding connection's fixing base 660, set up the limiting plate 670 and the regulation pole 680 in the slide rail 650 outside, the parallel main shaft 200 axial setting of regulation pole 680, the rotatable setting of regulation pole 680 one end is on fixing base 660, the other end passes the limiting plate 670 and is located the limiting plate 670 outside, be provided with the external screw thread on the regulation pole 680, adjust pole 680 and limiting plate 670 thread screwing, the cylinder body of radial loading pneumatic cylinder 610 is fixed on fixing base 660. It should be noted that the slide rail 650 may also be fixedly disposed on the ground.

When the adjusting device is used, the position of the fixed seat 660 on the sliding rail 650 is adjusted by screwing the adjusting rod 680, so that the axial position of the radial loading hydraulic cylinder 610 is adjusted.

The high-speed rail bearing testing machine further comprises a control system, the control system receives information of the first pressure sensor 560, the second pressure sensor 640, the temperature sensor 450 and the speed sensor 460 and controls the axial loading mechanism 500, the radial loading mechanism 600 and the spindle driving motor 300 according to the information, and the control system is arranged on the outer side of the machine body 100.

The control system in this embodiment may adopt a DCS system, and a controller of the control system is electrically connected to the first pressure sensor 560, the second pressure sensor 640, the temperature sensor 450, and the speed sensor 460, and sets an upper limit value for the sensors, and monitors data detected by the sensors in real time, and when a value detected by the sensors exceeds a predetermined value, an alarm is given through an alarm.

In use, the control system receives information from the first pressure sensor 560 and the second pressure sensor 640 to control the pressure loading values of the axial loading mechanism 500 and the radial loading mechanism 600, and receives information from the temperature sensor 450 and the speed sensor 460 to adjust the rotation speed of the spindle drive motor 300. And finally, the working condition simulation of the tested bearing 700 is realized.

Compared with the prior art, the embodiment has the beneficial effects that:

in the embodiment, the spindle 200 provided with the tested bearing 700 is driven to rotate at a high speed by the spindle driving motor 300, the loading seat 400 provided with the tested bearing 700 is respectively loaded in the axial direction and the radial direction by the axial loading mechanism 500 and the radial loading mechanism 600, the service condition of the high-speed rail bearing can be simulated by information interaction between the control system and each sensor, and the performance test of the high-speed rail bearing is met.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims (10)

1. The utility model provides a high-speed railway bearing testing machine which characterized in that: the loading device comprises a machine body, a main shaft driving motor, a loading seat, an axial loading mechanism and a radial loading mechanism; the main shaft is rotatably installed on the machine body through two main shaft fixing seats arranged at intervals, the main shaft driving motor is located in the machine body below the main shaft and is connected with the main shaft through a belt in a driving mode, the two loading seats are respectively located at two ends of the main shaft, a measured bearing is arranged in each loading seat, the inner ring of the measured bearing is sleeved on the main shaft, the axial loading mechanisms are arranged on the machine body and are located on the outer sides of the two loading seats and connected with the two loading seats and used for carrying out axial loading on the measured bearing, the radial loading mechanisms are two sets of mechanisms with the same structure and correspondingly arranged below the two loading seats and respectively connected with the two loading seats and used for carrying out radial loading on the measured bearing.

2. The high-speed rail bearing tester according to claim 1, characterized in that: the axial loading mechanism includes: the rectangular loading frame consists of two guide shafts arranged axially and two fixed beams arranged radially; an axial loading hydraulic cylinder axially arranged on one of the fixed beams; and a second load lever assembly axially disposed on the other of the fixed beams; a piston rod of the axial loading hydraulic cylinder is connected with a loading seat arranged at one end of the main shaft, the second loading rod component is connected with the loading seat arranged at the other end of the main shaft, and the two guide shafts are horizontally arranged on the machine body in a sliding manner through guide sleeves.

3. The high-speed rail bearing tester according to claim 2, characterized in that: a piston rod of the axial loading hydraulic cylinder is connected with a front end cover of a loading seat positioned at one end of the main shaft through a first loading rod assembly, and a first pressure sensor is arranged on the first loading rod assembly; the first loading rod assembly comprises a first connecting sleeve, a nut sleeve and a spherical short screw rod, one end of the first connecting sleeve is connected with a piston rod of the axial loading hydraulic cylinder, the other end of the first connecting sleeve is connected with one end of the nut sleeve, the other end of the nut sleeve is connected with a screw rod part of the spherical short screw rod, a ball head of the spherical short screw rod is arranged on a front end cover of a loading seat at one end of the main shaft through a spherical seat and a spherical cover, and the first pressure sensor is arranged between the first connecting sleeve and the nut sleeve; the second loading rod assembly comprises a second connecting sleeve and a spherical long screw rod, the second connecting sleeve is arranged on the fixed beam far away from one side of the loading hydraulic cylinder, the screw thread of the spherical long screw rod is screwed in the second connecting sleeve, and the ball head of the spherical long screw rod is arranged on the front end cover of the loading seat at the other end of the main shaft through a spherical seat and a spherical cover.

4. The high-speed rail bearing tester according to claim 1, characterized in that: each set of radial loading mechanism comprises a radial loading hydraulic cylinder, the cylinder body of the radial loading hydraulic cylinder is vertically arranged, and the piston rod of the radial loading hydraulic cylinder is connected with the loading seat.

5. The high-speed rail bearing tester according to claim 4, wherein: the piston rod of each radial loading hydraulic cylinder is connected with the loading seat through a loading block and two connecting rods, the piston rod of each radial loading hydraulic cylinder is connected with the loading block through a transition joint, a second pressure sensor is arranged on the transition joint, one end of each connecting rod is hinged to the two ends of the loading block, and the other end of each connecting rod is hinged to the corresponding two lugs on the loading seat.

6. The high-speed rail bearing tester according to claim 4, wherein: every set radial loading mechanism still includes axial displacement mechanism, axial displacement mechanism include along the slide rail that the axial set up, with slide rail sliding connection's fixing base, set up the limiting plate and the regulation pole in the slide rail outside, adjust the setting of pole parallel spindle axial, adjust the rotatable setting of pole one end on the fixing base, the other end passes the limiting plate and is located the limiting plate outside, be provided with the external screw thread on the regulation pole, adjust the pole and connect with the limiting plate screw thread soon, the cylinder body of radial loading pneumatic cylinder is fixed on the fixing base.

7. The high-speed rail bearing tester according to claim 1, characterized in that: the spindle driving motor is adjustably mounted on the ground through the motor mounting plate and the mounting bolts mounted on the four corners of the motor mounting plate, the lower ends of the mounting bolts are fixed on the ground, the upper ends of the mounting bolts are fixed to the motor mounting plate in a clamping mode through two clamping nuts, and the spindle driving motor is fixed to the motor mounting plate through bolts.

8. The high-speed rail bearing tester according to claim 1, characterized in that: the inner ring of the bearing to be measured in each loading seat is fixedly arranged on the main shaft, the inner ring of the bearing to be measured is in interference fit with the shaft end of the main shaft, the shaft end of the main shaft is provided with a limiting shaft shoulder, a rear baffle piece is arranged between the inner ring of the bearing to be measured and the limiting shaft shoulder, the outer end of the inner ring of the bearing to be measured is provided with a gland, the gland is fixed on the end face of the main shaft through bolts, and the gland is matched with the limiting shaft shoulder to complete axial limitation on the inner ring of the bearing to be measured; every the outer lane of the bearing of being surveyed in the loading seat is fixed to be set up in the loading seat, the outer lane of the bearing of being surveyed is injectd between the front end housing and the rear end cap of loading seat, the main shaft is located to the rear end cap cover of loading seat, axial flange on the rear end cap of loading seat with the outer lane terminal surface butt of the bearing of being surveyed, loading seat front end housing with be provided with the spacer sleeve between the bearing outer lane of being surveyed.

9. The high-speed rail bearing tester according to claim 1, characterized in that: every install the installation bearing in the mounting hole on the main shaft fixing base, the inner circle of installation bearing cup joints in the main shaft, main shaft drive motor's output shaft end is provided with driving pulley, be provided with driven pulleys on the main shaft, driven pulleys are located two between the main shaft fixing base, the belt is installed on driving pulley and driven pulleys, be provided with lubricating mechanism on the main shaft fixing base for lubricate the installation bearing.

10. The high-speed rail bearing tester according to claim 2, characterized in that: each guide shaft is formed by connecting two optical shafts into a whole through a connecting flange.

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