CN115452370A - Tunnel boring machine main bearing performance simulation test bed and lubricating flow field test method - Google Patents
Tunnel boring machine main bearing performance simulation test bed and lubricating flow field test method Download PDFInfo
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- CN115452370A CN115452370A CN202211119085.6A CN202211119085A CN115452370A CN 115452370 A CN115452370 A CN 115452370A CN 202211119085 A CN202211119085 A CN 202211119085A CN 115452370 A CN115452370 A CN 115452370A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
Abstract
The invention provides a tunnel boring machine main bearing performance simulation test bed and a lubrication flow field test method, and relates to boring machine simulation equipment, which comprises an oil pool providing an oil bath environment, a main bearing installed through a main bearing installation seat is arranged in the oil pool, a loading device and a rotating device are arranged outside the oil pool, the loading device is used for simulating axial load and overturning moment borne by the main bearing, the rotating device is used for driving an inner gear ring of the main bearing to rotate, an oil pumping system is arranged near the oil pool, the oil pumping system pumps oil into the main bearing through an oil inlet of the main bearing, and relevant test parameters of the main bearing are obtained through a measuring system.
Description
Technical Field
The invention relates to a tunneling machine simulation device, in particular to a tunnel tunneling machine main bearing performance simulation test bed and a lubrication flow field test method.
Background
The main bearing of the tunnel boring machine is arranged in a main driving box, is called a heart of the tunnel boring machine, is a key component of a cutter head driving system, and bears the main load of the running process of the tunnel boring machine.
When the cutter is in work, huge external load is transmitted to the inner gear ring of the main bearing through the cutter disc, the adapter flange and the like, the inner gear ring is driven to rotate by the motors through the gears, and the cutter disc is driven to rotate and cut by overcoming the operation torque. The overweight load and the huge torque can also cause strong temperature rise in the main bearing, and the actual working condition of the main bearing is very bad. Therefore, ensuring a good lubrication state is critical to the normal use and life of the main bearing of the tunnel boring machine. Although the cavity in the main drive box provides an oil bath lubrication environment for the main bearing, and the oil pumping system of the main drive can also continuously pump oil to the oil inlet of the main bearing so as to realize lubrication and cooling, the actual lubrication condition in the main bearing is difficult to observe; high bearing and high stability are also important directions for development and research of the main bearing of the tunnel boring machine all the time. Therefore, the invention needs to design a test bed and a test method which can carry out comprehensive observation and performance simulation on the main bearing of the tunnel boring machine, so as to carry out more comprehensive performance test and simulation research on the main bearing of the tunnel boring machine, which is closer to the real working condition, and provide design basis and support for effectively improving the lubricating state of the main bearing of the tunnel boring machine and improving the bearing capacity and stability of the main bearing of the tunnel boring machine.
At present, the performance simulation test bed of the main bearing of the tunnel boring machine mostly has a far difference with the real working condition of the main bearing, and mainly has the following defects: (1) The actual conditions of the lubricating flow field in the main bearing and the actual motion conditions of the rolling body and the retainer cannot be observed and tested intuitively; (2) The actual lubrication state of the main bearing cannot be simulated, or the lubrication state of the main bearing can be indirectly judged by simply measuring the temperature of the lubricating oil, so that the lubrication state of the main bearing cannot be comprehensively and truly reflected.
Disclosure of Invention
The invention provides a tunnel boring machine main bearing performance simulation test bed and a main bearing lubrication flow field test, and aims to solve the problem that a lubrication state cannot be intuitively reflected in the tunnel boring machine main bearing performance simulation test.
In order to achieve the above object, an embodiment of the present invention provides a performance simulation test bed for a main bearing of a tunnel boring machine, including:
a test base;
the oil pool is arranged on the test base;
the main bearing mounting seat is arranged in the oil pool and comprises a supporting base, a fixing ring is arranged on the supporting base, a movable block is arranged on the fixing ring, and the fixing ring and the movable block form a whole circular ring;
the main bearing comprises an inner gear ring, a first outer ring and a second outer ring, wherein the first outer ring and the second outer ring are arranged on the supporting base and are coaxially arranged with a whole circular ring;
the oil pumping system comprises an oil pumping motor, the oil pumping motor pumps oil quantitatively into the main bearing through an oil inlet, and a temperature sensor for detecting lubricating oil passing through the main bearing is arranged at an oil outlet;
the two loading devices are used for simulating the axial load and the overturning moment of the main bearing and comprise electric loading cylinders, pressure sensors are arranged at the output ends of the electric loading cylinders, switching flange plates are arranged on the pressure sensors, connecting sleeves are arranged on the switching flange plates and movably connected with loading guide rods, loading wheels are arranged at one ends of the loading guide rods, which penetrate through an oil pool, spherical bearings are arranged inside the loading wheels, transition rings are further connected to the inner flange plates, and tracks for the loading wheels to roll are arranged on the transition rings;
the rotating device comprises a rotating motor, and the rotating motor is used for driving the inner gear ring to rotate;
the measuring system comprises a PIV system and a PLC system, wherein the PLC system is used for controlling a rotating device, a loading device and an oil pumping system to simulate required working conditions, the PIV system comprises a laser module, an industrial camera and a post-processing module, the laser module is used for emitting two crossed lasers, and the post-processing module is used for processing a photo shot by the industrial camera.
Preferably, the test base comprises a large square steel frame, a reference flat plate, adjusting foot cups, an oil pool positioning plate, an oil pool adjusting device and a motor rack, wherein the reference flat plate is arranged on the large square steel frame, the adjusting foot cups are arranged at the bottom of the large square steel frame, the oil pool is arranged on the reference flat plate, the oil pool positioning plate is arranged on the reference flat plate and used for positioning and mounting the oil pool, the oil pool adjusting device is arranged on two sides of the oil pool to adjust the position of the oil pool, the motor rack is arranged on the reference flat plate, and the motor rack is used for arranging the loading device and the rotating device.
Preferably, the oil sump comprises an oil sump bottom, an oil sump shell, an oil sump sealing sleeve, an oil sump support cover plate and an oil sump cover plate, a positioning mounting block matched with the oil sump positioning plate is arranged on the oil sump bottom, an oil drain port is formed in the oil sump bottom, the oil sump shell and the oil sump cover plate are sequentially arranged at the oil sump bottom, the oil sump support is arranged on the oil sump shell, the oil sump support cover plate is covered above the oil sump support, the oil sump support is used for mounting an oil pumping system, the oil sump sealing sleeve is arranged on the oil sump shell, and the oil sump sealing sleeve is arranged at the contact position of the rotating device and the oil sump shell.
Preferably, the main first outer ring, the second outer ring, the oil pool shell and the oil pool cover are made of transparent materials.
Preferably, the oil pumping system includes an oil pumping support, the oil pumping support is arranged on the oil pool support cover plate, an oil pump driven by an oil pumping motor is arranged on the oil pumping support, an oil pipe is connected to the oil pump, the other end of the oil pipe is communicated with the oil inlet through an oil inlet sleeve with different inner diameters, a flow-adjustable distributor is arranged at an outlet of the oil pump, and a flow meter is arranged on a flow path of oil in the oil pipe.
Preferably, the loading device further comprises a linear bearing, the linear bearing is sleeved on the loading guide rod, the linear bearing is further connected with a linear bearing mounting seat, and the linear bearing mounting seat is arranged on the motor rack to guide the loading guide rod through the linear bearing.
The application also provides a main bearing lubrication flow field test method based on the main bearing performance simulation test bed of the tunnel boring machine, which comprises the following steps:
s1, adjusting a measuring system to enable an industrial camera to be aligned to a target measuring area of a main bearing, adjusting the focal length of the industrial camera, selecting an observation area in the target measuring area, enabling the observation area to be imaged clearly in the industrial camera, and performing pixel calibration and division on the observation area to obtain the number of observation area grids.
S2, adjusting the emitting positions of two rows of laser emitting of the laser module to enable the intersection point of the two rows of laser to be located in the middle of the target measuring area, and adjusting the angle of the laser to enable the laser irradiation direction to be perpendicular to the shooting direction of the industrial camera;
s3, adding tracer particles into the lubricating oil in the oil pool, and ensuring that each grid in the observation area contains 8-10 tracer particles;
s4, opening an oil pumping system, controlling an oil pumping motor according to test requirements and recording the rotating speed of the oil pumping motor;
s5, opening a control loader device and a rotating device, controlling an electric loading cylinder to apply pressure according to the simulated working condition, simulating the axial load and the overturning moment borne by a main bearing, controlling the simulated rotating speed of a rotating motor according to the simulated working condition, and recording the axial load, the overturning moment and the simulated rotating speed;
s6, establishing a main bearing simulation model based on the actual structure size of the test bed, and setting material parameters of lubricating oil in Fluent software; setting the flow at the oil inlet sleeve according to the oil supply flow provided by the oil pumping system for simulation, and acquiring the flow velocity of oil in the observation area; calculating the movement time by taking the same particle movement displacement in the two frames of images as a quarter grid, and taking the movement time as a photographing time interval delta T;
s7, inputting a photographing time interval delta T and photographing times, automatically photographing by an industrial camera, and processing the automatically photographed pictures in a post-processing module to obtain a speed cloud picture of the lubricating oil in the observation area;
s8, analyzing the speed cloud chart to obtain the lubricating flow field characteristics of the main bearing under the conditions;
and S9, adjusting oil inlets at different positions and/or oil inlet sleeves with different inner diameters, and repeating the test steps from S1 to S8.
Preferably, if the target measurement area is the main bearing main pushing side, the movable block is arranged on the fixed ring; and if the target measurement area is the main bearing auxiliary pushing side, taking down the movable block.
Preferably, in step S4, an oil pumping system is used for quantitatively providing lubricating oil, and a flow-adjustable distributor is arranged between the oil inlet and the oil outlet to adjust a required flow rate of the pumping oil.
Preferably, in step S5, the two control loading devices jointly or individually simulate different axial loads and overturning moments.
The scheme of the invention has the following beneficial effects:
1. adopt transparent oil bath and a plurality of oil bath seal cover in this application, the oil bath lubrication state of simulation main bearing in the main drive case that can be real to guarantee the leakproofness and the visuality of oil bath.
2. Through involving in the main bearing mount pad in this application for the main bearing is in vertical state, and be provided with the movable block on the main bearing mount pad and be used for realizing observing and testing the different sides of main bearing, realized the simulation of main bearing under complicated operating mode through loading system and rotational system, and realized simulation and control to different loads of main bearing, rotational speed and fuel feed through control system.
3. The first outer ring and the second outer ring are made of transparent materials, internal characteristic information of the main bearing can be visually observed and tested, the lubricating flow field characteristics of the whole main bearing in the working process can be directly and effectively obtained through the use of the transparent materials and the matching of shooting and processing pictures of an industrial camera, and a feasible method is provided for researching and ensuring the good lubricating state of the main bearing.
4. The measuring system comprises a PIV system and a PLC system, wherein the PIV system is used for realizing non-contact measurement of the characteristics of the main bearing lubrication flow field; the PLC system is used for controlling the test bed loading device, the rotating device, the oil pumping system and the like so as to simulate different working conditions of the main bearing, and related shot image data can be analyzed and processed repeatedly so as to achieve different research purposes, repeated tests are not needed, and the economic cost and the time cost are greatly saved.
5. Two electric loading cylinders are designed, and the PLC control module is used for controlling the output loads of the two electric loading cylinders to simulate the axial load or the overturning moment borne by the main bearing; an oil pumping system with adjustable oil supply flow is designed, and the simulation of the main bearing oil pumping lubricating system is realized; the design has the oil inlet of a plurality of different positions and interchangeable oil inlet cover, realizes the simulation of different fuel feeding volumes, different fuel feeding positions, different hydraulic fluid port sizes of main bearing to the influence of different parametric design to main bearing lubricating system performance is researched.
Drawings
FIG. 1 is a front view of a tunnel boring machine main bearing performance simulation test bed;
FIG. 2 is a left side view of a tunnel boring machine main bearing performance simulation test bed;
FIG. 3 is a top view of a tunnel boring machine main bearing performance simulation test bed;
FIG. 4 is a schematic view of a tunnel boring machine main bearing performance simulation test bed;
FIG. 5 is a schematic view of an oil inlet sleeve;
FIG. 6 is a schematic view of a transition ring;
FIG. 7 is a schematic view of a loading wheel;
fig. 8 is a PLC control module flow chart.
[ description of reference ]
1-a large square steel frame, 101-a reference flat plate, 102-an adjusting foot cup, 103-an oil pool positioning plate, 104-an oil pool adjusting device and 105-a motor rack;
2-oil pool bottom, 201-oil pool shell, 202-oil pool sealing sleeve, 203-oil pool support, 204-oil pool support cover plate, 205-oil pool cover;
3-a supporting base, 301-a fixed ring, 302-a movable block, 303-a bolt mounting plate and 304-a hanging ring;
4-a first outer ring, 401-a second outer ring, 402-an inner gear ring, 403-an oil inlet, 404-an oil outlet and 405-an oil inlet sleeve;
5-oil pumping motor, 501-oil pumping motor mounting rack, 502-oil pump, 503-flow adjustable distributor, 504 flow meter, 505-oil pipe and 506-temperature sensor;
6-electric loading cylinder, 601-pressure sensor, 602-adapter flange, 603-connecting sleeve, 604-loading guide rod, 605-linear bearing, 606-linear bearing mounting seat, 607-guide channel, 608-copper sleeve supporting frame, 609-loading wheel, 610-transition ring, 611-spherical bearing and 612-track;
7-a rotating motor, 701-a rotating motor mounting rack, 702-a corrugated pipe coupler, 703-a rotating shaft, 704-a first seated bearing, 705-a first seated bearing mounting rack, 706-a second seated bearing, 707-a second seated bearing mounting rack and 708-a rotating pinion;
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 8, an embodiment of the invention provides a tunnel boring machine main bearing performance simulation test base station, which mainly comprises a test base station, an oil pool, a main bearing mounting base, a main bearing, an oil pumping system, a loading device, a rotating device and a measuring system.
Referring to fig. 1-4, the test base includes a large square steel frame 1, a reference flat plate 101 is installed on the large square steel frame 1 to provide a horizontal reference for the whole test bed, an adjusting foot cup 102 is arranged at the bottom of the large square steel frame 1 to facilitate adjustment of the horizontal position of the reference flat plate 101, oil pool adjusting devices 104 are arranged on two sides above the reference flat plate 101, the oil pool is arranged between the two oil pool adjusting devices 104, an oil pool positioning block is arranged on the reference flat plate 101, and under the adjustment of the oil pool adjusting devices 104, the oil pool is installed on the reference flat plate 101 through the oil pool positioning block to facilitate alignment of the oil pool.
A motor stage 105 is also provided on the reference plate 101. The motor mount 105 is used to mount the aforementioned loading and rotating devices.
Aforementioned oil bath includes oil sump portion 2, and oil sump portion 2 is the metal sheet, is provided with the location installation piece on oil sump portion 2, and the location installation piece is used for installing the base bearing mount pad at oil sump portion 2, and the side of oil sump portion 2 is provided with the oil discharge outlet.
An oil pool shell 201 and an oil pool cover 205 surround the upper part of the oil pool bottom 2, and the oil pool bottom 2, the oil pool shell 201 and the oil pool cover 205 form a cavity for accommodating a main bearing mounting seat. The tank housing 201 and the tank cover 205 are made of a transparent material, such as transparent plexiglass. An oil pool support 203 and an oil pool support cover plate 204 are arranged on the side surface of the oil pool shell 201, the oil pool support cover plate 204 is arranged on the oil pool support 203 and supported by metal materials, and the oil pool support cover plate 204 is used for placing and bearing the oil pumping device. The oil pool shell 201 is provided with a hole for the loading device and the rotating device to pass through, the hole is provided with an oil pool sealing sleeve 202, and the oil pool sealing sleeve 202 is used for a gap between the loading device and the rotating device and the oil pool shell 201 to ensure a sealing box of oil liquid.
Preferably, three oil sump sealing sleeves 202 are arranged, the oil sump sealing sleeves 202 are connected with the oil sump housing 201 through bolts, and rubber sealing gaskets are additionally arranged at the screw heads of the bolts to further strengthen the sealing effect. During testing, the sump cover 205 is typically removed.
The aforementioned main bearing mounting seat comprises a supporting base 3, bolt mounting plates 303 are arranged on two sides of the supporting base 3, and the bolt mounting plates 303 are connected with positioning mounting blocks of the oil pool bottom 2 through bolts. Hanging rings 304 are further provided at both ends of the supporting base 3 for moving and mounting the supporting base 3. The supporting base 3 is provided with a fixed ring 301 and a movable block 302, the fixed ring 301 and the movable block 302 can form a whole circular ring, and the axial direction of the whole circular ring is the horizontal direction. The movable block 302 can be removed from the full circle.
The main bearing comprises a first outer ring 4, a second outer ring 401 and a ring gear 402, wherein when the main bearing works, the first outer ring 4 and the second outer ring 401 are fixed in a main bearing mounting seat through bolts, the first outer ring 4 and the second outer ring 401 are connected together through bolts, the ring gear 402 is arranged in the first outer ring 4 and the second outer ring, and the ring gear 402 is driven by a rotating device to rotate. The first outer ring 4 and the second outer ring 401 are fixed to the full circle ring by stud bolts. The first outer ring 4 and the second outer ring 401 are also made of transparent materials. Set up the oil inlet 403 of different positions on first outer lane 4 and second outer lane 401, aim at realizes that different oil port positions of different experiments are to main bearing pump oil and lubricated. As shown in fig. 5, an oil inlet sleeve 405 is disposed at the oil inlet 403, an outer diameter of the oil inlet sleeve 405 is fitted with the oil inlet 403, and the oil inlet sleeve 405 is provided with inner diameters of different sizes, so that an oil pumping lubrication test is performed on the main bearing by using different oil ports. The oil outlet 404 is arranged on the end face of the first outer ring 4, and the oil inlet 403 and the oil outlet 404 are plugged according to the test requirement.
Further, a transition ring 610 is provided on an end surface of the ring gear 402, and the transition ring 610 is provided with a rail 612 on the end surface.
The oil pumping system comprises an oil pumping motor 5 and an oil pump 502, wherein the oil pump 502 is driven by the oil pumping motor 5, and the oil pump 502 and the oil pumping motor 5 are installed on the oil pool support cover plate 204 through an oil pumping motor installation frame 501. The oil pumping system is used for pumping lubricating oil into the main bearing and forms circulation with the lubricating oil in the oil pool. An oil pipe 505 is arranged at an outlet of the oil pump 502, the oil pipe 505 is connected with the oil inlet 403 through an oil inlet sleeve 405, a flow-adjustable distributor 503 is arranged at the outlet of the oil pump 502, the flow-adjustable distributor 503 is used for adjusting the flow of lubricating oil pumped into the main bearing, and a flow meter 504 used for displaying the flow of the lubricating oil in the oil pipe 505 in real time is arranged at the downstream of the flow-adjustable distributor 503. A temperature sensor 506 is further provided near the oil outlet 404, and the temperature sensor 506 is configured to detect the temperature of the oil after passing through the main bearing.
The loading device comprises an electric loading cylinder 6, a pressure sensor 601 is arranged on the electric loading cylinder 6, the pressure sensor 601 is used for detecting a loading force applied by the electric loading cylinder 6, the pressure sensor 601 is connected with a loading guide rod 604 through a transfer flange 602 and a connecting sleeve 603, and the loading guide rod 604 penetrates through the oil pool shell 201 and extends into the oil pool shell. The end of the loading guide rod 604 extending into the oil sump housing 201 is further provided with a loading wheel 609, as shown in fig. 7, and a spherical bearing 611 is provided on the inner wall of the loading wheel 609.
Preferably, the loading device enters the sump housing 201 through the sump seal cartridge 202.
Further, a linear bearing mount 606 and a linear bearing 605 are provided on the motor mount 105, and the linear bearing 605 is provided on the motor mount 105 via the linear bearing mount 606.
Preferably, the oil pool bottom 2 is provided with a guide channel 607 and a copper bush support 608, the guide channel 607 is fixed on the oil pool bottom 2 through the copper bush support 608, and the guide channel 607 is used for guiding and fixing and supporting loading. The aforementioned loading wheel 609 acts on the belt transition ring 610, and specifically on the track 612 of the transition ring 610.
The rotating device comprises a rotating motor 7 and a rotating motor mounting frame 701, the rotating motor 7 is mounted on a motor rack 105 through the rotating motor mounting frame 701, the output end of the rotating motor 7 is elastically connected with a corrugated pipe coupling 702, the other end of the corrugated pipe coupling 702 is connected with a rotating shaft 703, the rotating shaft 703 penetrates through an oil sump housing 201 through an oil sump sealing sleeve 202, one end of the rotating shaft 703, which penetrates through the oil sump housing 201, is provided with a rotating pinion 708, and the rotating pinion 708 is meshed with and drives an inner gear ring 402. A first bearing with a seat 704 and a second bearing with a seat 706 are respectively arranged on the end faces of the two ends of the main bearing, and the first bearing with a seat 704 and the second bearing with a seat 706 are used for supporting the rotating shaft 703. The first mounted bearing 704 and the second mounted bearing 706 are respectively arranged at the bottom 2 of the oil pool through a first mounted bearing mounting rack 705 and a second mounted bearing mounting rack 707.
The measuring system comprises a PIV system and a PLC system, wherein the PIV system is used for obtaining and processing images, and the PLC system controls the loading device, the oil pumping system and the rotating device to simulate different working conditions. Specifically, the PIV system includes a laser module, an industrial camera disposed on a mobile support, and a post-processing module that facilitates adjusting the position of the industrial camera. The industrial camera is directed towards the main bearing. The laser module is used for emitting two beams of laser which can be intersected. The post-processing module is used for processing pictures shot by the industrial camera.
By adopting the transparent oil pool and the plurality of oil pool sealing sleeves 202, the oil bath lubrication state of the main bearing in the main drive box can be truly simulated, and the sealing performance and the visibility of the oil pool are ensured.
Through the design main bearing mount pad in this application for the main bearing is in vertical state, and be provided with movable block 302 on the main bearing mount pad and be used for realizing observing and testing the different sides of main bearing, realized the simulation of main bearing under the complex operating mode through loading system and rotational system, and realized simulation and control to different loads of main bearing, rotational speed and fuel delivery through control system.
The first outer ring 4 and the second outer ring 401 are made of transparent materials, internal characteristic information of the main bearing can be visually observed and tested, the lubricating flow field characteristic, the load distribution characteristic and the dynamic characteristic of parts of the whole main bearing in the working process can be directly and effectively obtained through the use of the transparent materials and the matching of the shooting and processing of an industrial camera, and a feasible method is provided for researching and ensuring the good lubricating state of the main bearing, improving the bearing capacity and improving the dynamic characteristic of the parts.
The measurement system comprises a PIV system and a PLC system, wherein the PIV system is used for realizing non-contact measurement of the characteristics of the main bearing lubrication flow field; the PLC system is used for controlling the test bed loading device, the rotating device, the oil pumping system and the like so as to simulate different working conditions of the main bearing, and related shot image data can be analyzed and processed repeatedly so as to achieve different research purposes, repeated tests are not needed, and the economic cost and the time cost are greatly saved.
The application also provides a tunnel boring machine main bearing lubrication flow field test method, which utilizes the tunnel boring machine main bearing performance simulation test bed and comprises the following steps:
s1, adjusting the height and the position of a movable support in a measuring system to enable an industrial camera to be aligned to a target measuring area of a main bearing, selecting an area in the target measuring area as an observation area, adjusting the focal length of the industrial camera, clearly imaging the observation area in the industrial camera, and performing pixel calibration and division on the observation area to obtain the number of observation area grids. If the target measurement area is the main bearing main push side, the movable block 302 is arranged on the fixed ring 301; and if the target measurement area is the main bearing auxiliary pushing side, the movable block 302 is taken down.
S2, adjusting the two rows of laser emitting positions of the laser module to enable the intersection point of the two rows of lasers to be located in the middle of the target measuring area, and adjusting the angle of the lasers to enable the laser irradiation direction to be perpendicular to the shooting direction of the industrial camera;
furthermore, the laser beams of the two rows of emitted lasers at the intersection are the thinnest, and the positions of the laser beams emitted by the laser modules are adjusted, so that the thinnest laser beams are irradiated in the middle of the target measuring area.
S3, adding tracer particles into the lubricating oil in the oil pool, and ensuring that each grid in the observation area contains 8-10 tracer particles; the light intensity of the intersection point of the two laser beams is maximum, the reflection brightness of the tracing particles can be improved, and the tracing is more obvious.
And S4, opening an oil pumping system, controlling the oil pumping motor 5 according to test requirements, and recording the rotating speed of the oil pumping motor 5, wherein the oil pumping system is used for quantitatively providing lubricating oil, a flow-adjustable distributor 503 is arranged between the oil inlet 403 and the oil outlet 404 to adjust the required oil pumping flow, and the oil pumping amount is displayed and recorded through a flow meter 504.
S5, opening the loading device and the rotating device, controlling the electric loading cylinder 6 to apply pressure according to the simulated working condition, simulating the axial load and the overturning moment borne by the main bearing, controlling the simulated rotating speed of the rotating motor 7 according to the simulated working condition, recording the numerical values of the two pressure sensors 601, calculating the axial load and the overturning moment according to the numerical values, and reading the simulated rotating speed; the two control loading devices jointly or independently simulate different axial loads and overturning moments.
S6, establishing a main bearing simulation model based on the actual structural size of the test bed, and setting material parameters of lubricating oil in Fluent software; setting the flow at the oil inlet sleeve according to the oil supply flow provided by the oil pumping system for simulation, and acquiring the flow velocity of oil in an observation area; calculating the movement time by taking the same particle movement displacement in the two frames of images as a quarter grid, and taking the movement time as a photographing time interval delta T;
s7, opening the industrial camera, inputting a photographing time interval delta T and photographing times, automatically photographing, processing the automatically photographed pictures in a post-processing module, and processing to obtain a speed cloud picture of the lubricating oil in the observation area;
s8, analyzing the speed cloud chart to obtain the lubricating flow field characteristics of the main bearing under the conditions;
and S9, adjusting oil inlets 403 at different positions and/or oil inlet sleeves 405 with different inner diameters, and repeating the test steps from S1 to S8.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. Tunnel boring machine owner bearing performance simulation test platform which characterized in that includes:
a test base station;
the oil pool is arranged on the test base platform;
the main bearing mounting seat is arranged in the oil pool and comprises a supporting base, a fixing ring is arranged on the supporting base, a movable block is arranged on the fixing ring, and the fixing ring and the movable block form a whole circular ring;
the main bearing comprises an inner gear ring, a first outer ring and a second outer ring, wherein the first outer ring and the second outer ring are arranged on the supporting base and are coaxially arranged with a whole circular ring;
the oil pumping system comprises an oil pumping motor, the oil pumping motor pumps oil quantitatively into the main bearing through an oil inlet, and a temperature sensor for detecting lubricating oil passing through the main bearing is arranged at an oil outlet;
the two loading devices are used for simulating the axial load and the overturning moment of the main bearing and comprise electric loading cylinders, pressure sensors are arranged at the output ends of the electric loading cylinders, switching flange plates are arranged on the pressure sensors, connecting sleeves are arranged on the switching flange plates and movably connected with loading guide rods, loading wheels are arranged at one ends of the loading guide rods, which penetrate through an oil pool, spherical bearings are arranged inside the loading wheels, transition rings are further connected to the inner flange plates, and tracks for the loading wheels to roll are arranged on the transition rings;
the rotating device comprises a rotating motor, and the rotating motor is used for driving the inner gear ring to rotate;
the measuring system comprises a PIV system and a PLC system, wherein the PLC system is used for controlling a rotating device, a loading device and an oil pumping system to simulate required working conditions, the PIV system comprises a laser module, an industrial camera and a post-processing module, the laser module is used for emitting two crossed lasers, and the post-processing module is used for processing a photo shot by the industrial camera.
2. The tunneling machine main bearing performance simulation test bed according to claim 1, characterized in that: the experimental base station comprises a large square steel frame, a reference flat plate, adjusting foot cups, an oil pool positioning plate, an oil pool adjusting device and a motor rack, wherein the reference flat plate is arranged on the large square steel frame, the adjusting foot cups are arranged at the bottom of the large square steel frame, the oil pool is arranged on the reference flat plate, the oil pool positioning plate is used for positioning and installing the oil pool, the oil pool adjusting device is arranged on the two sides of the oil pool to adjust the position of the oil pool, the motor rack is arranged on the reference flat plate, and the motor rack is used for setting the loading device and the rotating device.
3. The tunneling machine main bearing performance simulation test bed according to claim 2, characterized in that: the oil sump comprises an oil sump bottom, an oil sump shell, an oil sump sealing sleeve, an oil sump support cover plate and an oil sump cover plate, wherein a positioning installation block matched with an oil sump positioning plate is arranged on the oil sump bottom, an oil discharge port is formed in the oil sump bottom, the oil sump shell and the oil sump cover plate are sequentially arranged at the oil sump bottom, the oil sump support is arranged on the oil sump shell, the oil sump support cover plate is arranged above the oil sump support in a covering mode, the oil sump support is used for installing an oil pumping system, the oil sump sealing sleeve is arranged on the oil sump shell, and the oil sump sealing sleeve is arranged at the contact position of the rotating device and the oil sump shell.
4. The tunneling machine main bearing performance simulation test bed according to claim 3, characterized in that: the main first outer ring, the second outer ring, the oil pool shell and the oil pool cover are made of transparent materials.
5. The tunneling machine main bearing performance simulation test bed according to claim 4, characterized in that: the oil pumping system comprises an oil pumping support, the oil pumping support is arranged on the oil pool support cover plate, an oil pump driven by an oil pumping motor is arranged on the oil pumping support, an oil pipe is connected onto the oil pump, the other end of the oil pipe is communicated with an oil inlet through an oil inlet sleeve with different inner diameters, a flow-adjustable distributor is arranged at an outlet of the oil pump, and a flow meter is arranged on a flow path of oil in the oil pipe.
6. The tunneling machine main bearing performance simulation test bed according to claim 5, characterized in that: the loading device further comprises a linear bearing, the linear bearing is sleeved on the loading guide rod and is further connected with a linear bearing mounting seat, and the linear bearing mounting seat is arranged on the motor rack to guide the loading guide rod through the linear bearing.
7. A tunnel boring machine main bearing lubrication flow field test method, which adopts the tunnel boring machine main bearing performance simulation test bed of any one of claims 1 to 6, is characterized by comprising the following steps:
s1, adjusting a measurement system to enable an industrial camera to be aligned to a target measurement area of a main bearing, adjusting the focal length of the industrial camera, selecting an observation area in the target measurement area, enabling the observation area to be clearly imaged in the industrial camera, and performing pixel calibration and division on the observation area to obtain the number of observation area grids;
s2, adjusting the emitting positions of two rows of laser emitting of the laser module to enable the intersection point of the two rows of laser to be located in the middle of the target measuring area, and adjusting the angle of the laser to enable the laser irradiation direction to be perpendicular to the shooting direction of the industrial camera;
s3, adding tracer particles into the lubricating oil in the oil pool, and ensuring that each grid in the observation area contains 8-10 tracer particles;
s4, opening the oil pumping system, controlling the oil pumping motor according to the test requirements and recording the rotating speed of the oil pumping motor;
s5, opening a control loader device and a rotating device, controlling an electric loading cylinder to apply pressure according to the simulated working condition, simulating the axial load and the overturning moment borne by a main bearing, controlling the simulated rotating speed of a rotating motor according to the simulated working condition, and recording the axial load, the overturning moment and the simulated rotating speed;
s6, establishing a main bearing simulation model based on the actual structural size of the test bed, setting material parameters of lubricating oil, and setting oil supply flow provided by an oil pumping system to set flow at an oil inlet sleeve for simulation, and acquiring the flow velocity of the oil in an observation area; calculating the movement time by taking the same particle movement displacement in the two frames of images as a quarter grid, and taking the movement time as a photographing time interval delta T;
s7, inputting a photographing time interval delta T and photographing times, automatically photographing by an industrial camera, and processing the automatically photographed picture in a post-processing module to obtain a speed cloud picture of the lubricating oil in the observation area;
s8, analyzing the speed cloud chart to obtain the lubricating flow field characteristics of the main bearing under the conditions;
and S9, adjusting oil inlets at different positions and/or oil inlet sleeves with different inner diameters, and repeating the test steps from S1 to S8.
8. The tunneling machine main bearing lubrication flow field test method according to claim 7, characterized in that: if the target measurement area is the main bearing main push side, the movable block is arranged on the fixed ring; and if the target measurement area is the main bearing auxiliary pushing side, taking down the movable block.
9. The tunneling machine main bearing lubrication flow field test method according to claim 8, characterized in that: in the step S4, the oil pumping system is used for quantitatively providing lubricating oil, and a flow-adjustable distributor is arranged between the oil inlet and the oil outlet to adjust the required flow rate of the pumping oil.
10. The tunneling machine main bearing lubrication flow field test method according to claim 7, characterized in that: in step S5, the two control loading devices jointly or individually simulate different axial loads and overturning moments.
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| CN117074020A (en) * | 2023-07-17 | 2023-11-17 | 泰安海纳轴研科技有限公司 | Testing device and testing method for oil-gas lubrication bearing performance and lubricant flow |
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| CN117074020A (en) * | 2023-07-17 | 2023-11-17 | 泰安海纳轴研科技有限公司 | Testing device and testing method for oil-gas lubrication bearing performance and lubricant flow |
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