CN211477612U - Testing system for floating thrust bearing of axial flow turbine supercharger - Google Patents
Testing system for floating thrust bearing of axial flow turbine supercharger Download PDFInfo
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- CN211477612U CN211477612U CN202020477321.1U CN202020477321U CN211477612U CN 211477612 U CN211477612 U CN 211477612U CN 202020477321 U CN202020477321 U CN 202020477321U CN 211477612 U CN211477612 U CN 211477612U
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Abstract
The utility model discloses an axial flow turbo charger floating thrust bearing's test system, the utility model discloses booster operating speed and thrust can be simulated to the monitoring floats thrust bearing's bearing speed and oil film thickness under the various operating condition of pressure boost. A system for testing a floating thrust bearing of an axial flow turbocharger, comprising: a turbine drive system; a wind source system for supplying wind to the turbine drive system; the rotor system is in power connection with the turbine driving system and comprises a main shaft, the main shaft is in power connection with the turbine driving system, a floating thrust bearing and a ring pusher are coaxially arranged on the main shaft, the floating thrust bearing is adjacent to the turbine driving system, and the ring pusher is used for applying axial thrust to the floating thrust bearing; the thrust simulation system is used for applying axial thrust to the ring; and the test system is used for monitoring the rotating speed of the main shaft, the rotating speed of the floating thrust bearing, the displacement of the ring thrust and the axial thrust of the main shaft.
Description
Technical Field
The utility model belongs to the turbo charger field, more specifically relates to a floating thrust bearing's of axial flow turbo charger test system.
Background
During the operation of the supercharger, the compressor and the turbine both generate axial thrust, and the resultant force of the axial thrust is generally directed to the end of the compressor. Turbochargers typically employ fixed-pad bearings to carry the axial thrust of the supercharger, but have limited carrying capacity. With the continuous improvement of the rotating speed, the pressure and the flow of the turbocharger, the axial thrust of the turbocharger is also continuously increased. Therefore, the axial-flow turbocharger adopts the full-floating thrust bearing, improves the bearing capacity, reduces the relative linear velocity of the bearing, and solves the problems of oil film temperature rise and bearing capacity reduction caused by the increase of the linear velocity of the journal.
Because the rotating speed and the supercharging pressure of the supercharger constantly change and are influenced by the rotating speed and the axial thrust of the supercharger, the bearing load of the floating thrust bearing constantly changes, and the oil film thickness and the rotating speed of the thrust bearing also constantly change. In general, the rotating speed, the bearing capacity and the oil film thickness of the two sides of the floating thrust bearing can be obtained by a CFD dynamic grid simulation technology, but the rotating speed, the bearing capacity and the oil film thickness of the two sides of the floating thrust bearing are difficult to measure in the actual supercharger operation process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide an axial compressor turbo charger floating thrust bearing's test system, the utility model discloses booster operating speed and thrust can be simulated to the monitoring floats thrust bearing's bearing speed and oil film thickness under the various operating condition of pressure boost.
The purpose of the utility model is realized like this:
a system for testing a floating thrust bearing of an axial flow turbocharger, comprising:
a turbine drive system;
a wind source system for supplying wind to the turbine drive system;
the rotor system is in power connection with the turbine driving system and comprises a main shaft, the main shaft is in power connection with the turbine driving system, a floating thrust bearing and a ring pusher are coaxially arranged on the main shaft, the floating thrust bearing is adjacent to the turbine driving system, and the ring pusher is used for applying axial thrust to the floating thrust bearing;
the thrust simulation system is used for applying axial thrust to the ring;
and the test system is used for monitoring the rotating speed of the main shaft, the rotating speed of the floating thrust bearing, the displacement of the ring thrust and the axial thrust of the main shaft.
Preferably, the turbine driving system comprises a power turbine, the power turbine is mounted on the output shaft, the air inlet end of the power turbine is connected with the wind source system, and the air outlet end of the power turbine is connected with the valve.
Preferably, the air source system includes compressor unit, heating device and three way valve group that connect gradually, the compressor unit is used for exporting compressed air, heating device is used for heating the compressed air of compressor unit output, the three way valve group is used for heating the compressed air input turbine actuating system with the heating, and the drive turbine is rotatory to atmospheric pressure, flow are adjusted.
Preferably, the thrust simulation system includes grease chamber, high-pressure oil pump, be equipped with hydraulic drive's thrust disc in the grease chamber, the thrust disc is connected with the main shaft for push away to the ring and apply axial thrust, the high-pressure oil pump is used for supplying hydraulic oil to the grease chamber, applies axial thrust to the thrust disc, and the high-pressure oil pump passes through motor drive.
Preferably, the thrust simulation system further comprises a pressure regulating valve, an overflow valve and an oil tank, wherein the overflow valve is arranged between the thrust disc and the high-pressure oil pump, the high-pressure oil pump is connected with the oil tank, and the overflow valve is arranged and used for being matched with the overflow valve to regulate the pressure of the hydraulic oil.
Preferably, the test system comprises two rotation speed sensors, two displacement sensors and a force sensor, wherein the two rotation speed sensors are used for monitoring the rotation speed of the main shaft and the rotation speed of the floating thrust bearing, the two displacement sensors are used for monitoring the displacement of the floating thrust bearing and the displacement of the ring thrust, and the force sensor is used for monitoring the axial thrust of the main shaft.
A method for testing a floating thrust bearing of an axial flow turbocharger,
the wind source system supplies wind to the turbine driving system to enable the turbine driving system to work;
the turbine driving system drives the rotor system to enable the floating thrust bearing and the ring to rotate in a pushing mode, meanwhile, the thrust simulation system works to apply axial thrust to the ring pushing mode, the ring pushes the floating thrust bearing to apply the axial thrust, and the working state of the supercharger is simulated;
the floating thrust bearing starts to rotate, oil wedges on two sides of the floating thrust bearing generate an extrusion oil film, and the extrusion oil film is finally stabilized under the working rotating speed and the oil film thickness;
the aim of testing the performance of the floating thrust bearing of the axial-flow turbocharger is achieved by monitoring the rotating speed of the main shaft and the rotating speed of the floating thrust bearing, the displacement of the ring thrust and the axial thrust of the main shaft through the testing system.
Preferably, the rotational speed of the turbine driving system is adjusted through the wind source system, and then the rotational speed of the rotor system is adjusted; adjusting the axial thrust applied to the ring through a thrust simulation system, and further adjusting the axial thrust applied to the floating thrust bearing; the performance of the floating thrust bearing of the axial flow turbocharger is tested at different rotating speeds and under different thrust forces.
Preferably, the thickness of the oil film on two sides of the floating thrust bearing is calculated through the rotating speed of the main shaft, the rotating speed of the floating thrust bearing, the displacement of the ring thrust and the axial thrust of the main shaft, and the calculation formula is as follows:
the thickness of an oil film on the side, back to the ring, of the floating thrust bearing is equal to the displacement of the floating thrust bearing;
the thickness of the oil film on the side, close to the ring, of the floating thrust bearing is equal to the ring pushing displacement-floating thrust bearing displacement.
Since the technical scheme is used, the utility model discloses following beneficial effect has:
the utility model discloses booster operating speed and thrust can be simulated to the bearing rotational speed and the oil film thickness of thrust bearing float under the various operating condition of pressure boost are accomplished to the accurate test of the unsteady thrust bearing performance of turbo charger, have guided booster floating thrust bearing's higher efficiency and bearing capacity structural design.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an axial flow turbocharger floating thrust bearing installation.
Reference numerals
In the attached drawing, 1-centrifugal compressor unit, 2-heater, 3-three-way valve group, 4-power turbine, 5-output shaft, 6-base, 7-floating thrust bearing, 8-ring thrust, 9-thrust disc, 10-pressure regulating valve, 11-motor oil pump, 12-overflow valve, 13-oil tank, 14-main shaft, 15-rotation speed sensor, 16-displacement sensor, 17-force sensor, 18-valve, 19-bearing seat.
Detailed Description
Referring to fig. 1 and 2, a system for testing a floating thrust bearing of an axial flow turbocharger includes: a turbine drive system; a wind source system for supplying wind to the turbine drive system; the rotor system is in power connection with the turbine driving system and comprises a base 6, a main shaft 14 is mounted on the base 6, the main shaft 14 is in power connection with the turbine driving system 5, a floating thrust bearing 7 and a ring pusher 8 are coaxially mounted on the main shaft 14, the floating thrust bearing 7 is adjacent to the turbine driving system, and the ring pusher 8 is used for applying axial thrust to the floating thrust bearing 7; a thrust simulation system for applying an axial thrust to the ring pusher 8; and the test system is used for monitoring the rotating speed of the main shaft 14 and the rotating speed of the floating thrust bearing 7, the displacement of the floating thrust bearing 7 and the displacement of the ring thrust 8, and the axial thrust of the main shaft 14.
The ring pushing installation structure is as follows: the ring is fixed on the main shaft of the supercharger, the main shaft penetrates through the center hole of the floating thrust bearing, the thrust surface of the ring is matched with one side of the floating thrust bearing, and the other side of the floating thrust bearing is matched with the thrust surface of the bearing seat. In the operation process of the supercharger, the ring thrust and the main shaft rotate at a high speed, and an oil film between the ring thrust and the floating thrust bearing forms oil pressure and bears the thrust. Meanwhile, as the lubricating oil has viscosity, the floating thrust bearing is pushed by the ring to rotate, and an oil film between the floating thrust bearing and the bearing seat forms oil pressure and bears thrust.
The turbine driving system comprises a power turbine 4, the power turbine 4 is installed on an output shaft 5, the main shaft 14 is connected with the output shaft 5, the air inlet end of the power turbine 4 is connected with an air source system, and the air outlet end of the power turbine 4 is connected with a valve 18. The power turbine 4 is driven by high-temperature and high-pressure air to rotate to do work and output shaft work. Under the regulation of the three-way valve group 3, part of compressed air bypasses, so that the air source system provides gas with different pressures, temperatures and flows for a turbine driving system to do work, when the turbine stops suddenly, the three-way valve group 3 cuts off high-temperature and high-pressure air, closes the valve 18, ensures the safety of the compressor and ensures the stop of the turbine.
The air source system comprises a compressor unit 1, a heating device 2 and a three-way valve group 3 which are sequentially connected, wherein the compressor unit 1 is used for outputting compressed air, the heating device 2 is used for heating the compressed air output by the compressor unit 1, the three-way valve group 3 is used for heating the heated compressed air and inputting the heated compressed air into a turbine driving system, a driving turbine rotates, and air pressure and flow are adjusted.
The thrust simulation system comprises an oil chamber and a high-pressure oil pump 11, a hydraulic drive thrust disc 9 is arranged in the oil chamber, the thrust disc 9 is connected with a main shaft 14 and used for pushing 8 to apply axial thrust to the ring, the high-pressure oil pump 11 is used for supplying hydraulic oil to the oil chamber and applying axial thrust to the thrust disc 9, and the high-pressure oil pump 11 is driven by a motor. The thrust simulation system further comprises a pressure regulating valve 10, an overflow valve 12 and an oil tank 13, wherein the overflow valve 12 is arranged between the thrust disc 9 and the high-pressure oil pump 11, the high-pressure oil pump 11 is connected with the oil tank 13, and the overflow valve 12 is arranged and used for being matched with the overflow valve 12 to regulate the pressure of hydraulic oil. Thus, the main shaft 14 and the ring pusher 8 are rotated by the power turbine, the ring pusher 8 simulates axial thrust of the supercharger by the thrust disk 9, the pressure of the hydraulic oil is adjusted by the pressure adjusting valve 10, and the oil pressure on the thrust disk 9 thus acting is changed, and the thrust is also changed accordingly.
The testing system comprises two rotating speed sensors 15, two displacement sensors 16 and a force sensor 17, wherein the two rotating speed sensors 15 are used for monitoring the rotating speed of the main shaft 14 and the rotating speed of the floating thrust bearing 7, the two displacement sensors 16 are used for monitoring the displacement of the floating thrust bearing 7 and the displacement of the ring thrust 8, and the force sensor 17 is used for monitoring the axial thrust of the main shaft 14.
A method for testing a floating thrust bearing of an axial flow turbocharger comprises the following steps:
the wind source system supplies wind to the turbine driving system to enable the turbine driving system to work;
the turbine driving system drives the rotor system to enable the floating thrust bearing 7 and the ring thrust 8 to rotate, meanwhile, the thrust simulation system works to apply axial thrust to the ring thrust 8, and the ring thrust 8 applies axial thrust to the floating thrust bearing to simulate the working state of the supercharger;
the floating thrust bearing starts to rotate, oil wedges on two sides of the floating thrust bearing generate an extrusion oil film, and the extrusion oil film is finally stabilized under the working rotating speed and the oil film thickness;
through 14 rotational speeds of test system monitoring main shaft and the 7 rotational speeds of thrust bearing that float to and, the 7 displacements of thrust bearing that float push away 8 displacements with the ring, and, the axial thrust of main shaft 14, push away 8 displacements, the axial thrust of main shaft 14 through 14 rotational speeds of main shaft, the 7 rotational speeds of thrust bearing that float, the displacement of thrust bearing that float, ring, calculate the oil film thickness of thrust bearing both sides that float, the computational formula is:
the thickness of an oil film on the side of the floating thrust bearing, which is back to the ring pushing part 8, is equal to the displacement of the floating thrust bearing;
the thickness of the oil film on the side of the floating thrust bearing close to the ring thrust 8 is equal to the ring thrust displacement-floating thrust bearing displacement.
The purpose of testing the performance of the floating thrust bearing of the axial flow turbocharger is achieved.
The rotating speed of the turbine driving system is adjusted through the wind source system, and then the rotating speed of the rotor system is adjusted; the axial thrust applied to the ring thrust 8 is adjusted through a thrust simulation system, and the axial thrust applied to the floating thrust bearing 7 is further adjusted; the performance of the floating thrust bearing of the axial flow turbocharger is tested at different rotating speeds and under different thrust forces.
Examples
1. High-temperature and high-pressure gas is provided by a wind source system, enters a turbine driving system after passing through a pipeline system, and drives a rotor system to rotate after the turbine rotates at a high speed.
2. The thrust simulation system works to generate oil pressure and axial thrust to simulate the working state of the supercharger, so that the floating thrust bearing 7 starts to rotate, and oil wedges on two sides establish a squeezing oil film and are stabilized at the working rotating speed and under the oil film.
3. Controlling the pressure and flow of the wind source, and adjusting the rotating speed of the rotor system; the oil pressure of the thrust simulation system is controlled, and the thrust of the bearing is adjusted, so that the running state of the supercharger under different rotating speeds and different pressure ratios can be simulated.
4. The method comprises the steps of maintaining the rotor system to operate at a rotating speed N1 and keeping the rotating speed constant, adjusting bearing thrust (F1 and F2 … … Fn), monitoring the rotating speed (N1 and N2 … … ni) of the floating thrust bearing under the condition of loading the constant rotating speed N1 and different axial thrust (F1 and F2 … … Fn), the displacement (S1 and S2 … … Si) of the floating thrust bearing, the displacement (L1 and L2 … … Li) of the ring thrust bearing and the like through a test system, and recording the data through the test system.
5. The method comprises the steps of adjusting the running speed of a rotor to constantly run at a speed N2, adjusting the thrust of bearings (F1, F2 … … Fn), monitoring parameters (N1, N2 … … ni), floating thrust bearing displacement (S1, S2 … … Si), ring thrust displacement (L1, L2 … … Li) and the like of floating thrust bearings under the condition of loading a constant speed N2 and different axial thrusts (F1, F2 … … Fn) through a test system, and recording the data by the test system.
6. And repeating the step 4-5, so as to obtain parameters such as (N1, N2 … … ni), floating thrust bearing displacement (S1, S2 … … Si), ring thrust displacement (L1, L2 … … Li) and the like of the floating thrust bearing under different rotating speeds (N1, N2 … … Nn) and different thrusts (F1, F2 … … Fn), and the left side and right side oil film thicknesses of the floating thrust bearing 7 can be calculated through calculation formulas Mi ═ Si and Ci ═ Li-Si of the oil film thicknesses.
Description of the drawings:
wherein the rotation speed of the main shaft 14 is represented by N1 and N2 … … Ni, the rotation speed of the floating thrust bearing 7 is represented by N1 and N2 … … Ni, the displacement of the floating thrust bearing 7 is represented by S1 and S2 … … Si, the displacement of the ring thrust bearing 8 is represented by L1 and L2 … … Li, the thickness of the oil film on the left side of the floating thrust bearing 7 is represented by M1 and M2 … … Mi, the thickness of the oil film on the right side (the gap between the floating thrust bearing 7 and the ring 8) of the floating thrust bearing 7 is represented by C1 and C2 … … Ci, when the system is calibrated, the time scales of the thickness of the oil film on the left side and the right side of the floating thrust bearing 7 being 0mm are set as initial values, the displacement of the floating thrust bearing 7 and the ring thrust bearing 8 is set as 0mm, so as to obtain a calculation formula of the oil film thickness, Mi-Si and Ci-Li-Si, so as to detect,
finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a test system of axial flow turbo charger floating thrust bearing which characterized in that includes:
a turbine drive system;
a wind source system for supplying wind to the turbine drive system;
the rotor system is in power connection with the turbine driving system and comprises a main shaft, the main shaft is in power connection with the turbine driving system, a floating thrust bearing and a ring pusher are coaxially arranged on the main shaft, the floating thrust bearing is adjacent to the turbine driving system, and the ring pusher is used for applying axial thrust to the floating thrust bearing;
the thrust simulation system is used for applying axial thrust to the ring;
and the test system is used for monitoring the rotating speed of the main shaft, the rotating speed of the floating thrust bearing, the displacement of the ring thrust and the axial thrust of the main shaft.
2. The system for testing the floating thrust bearing of the axial flow turbocharger according to claim 1, wherein the turbine driving system comprises a power turbine, the power turbine is mounted on the output shaft, an air inlet end of the power turbine is connected with the air source system, and an air outlet end of the power turbine is connected with the valve.
3. The system for testing the floating thrust bearing of the axial flow turbocharger according to claim 1, wherein the air source system comprises a compressor unit, a heating device and a three-way valve group which are connected in sequence, the compressor unit is used for outputting compressed air, the heating device is used for heating the compressed air output by the compressor unit, and the three-way valve group is used for inputting the heated compressed air into the turbine driving system, driving the turbine to rotate and regulating air pressure and flow.
4. The system for testing the floating thrust bearing of the axial flow turbocharger according to claim 1, wherein the thrust simulation system comprises an oil chamber and a high-pressure oil pump, a hydraulically-driven thrust disc is arranged in the oil chamber, the thrust disc is connected with the main shaft and used for applying axial thrust to the ring, the high-pressure oil pump is used for supplying hydraulic oil to the oil chamber and applying axial thrust to the thrust disc, and the high-pressure oil pump is driven by a motor.
5. The system for testing the floating thrust bearing of the axial flow turbocharger according to claim 4, wherein the thrust simulation system further comprises a pressure regulating valve, an overflow valve and an oil tank, the overflow valve is arranged between the thrust disc and the high-pressure oil pump, the high-pressure oil pump is connected with the oil tank, and the overflow valve is arranged and used for being matched with the overflow valve to regulate the pressure of hydraulic oil.
6. The system of claim 1, wherein the system comprises two speed sensors for monitoring the rotational speed of the main shaft and the rotational speed of the floating thrust bearing, two displacement sensors for monitoring the displacement of the floating thrust bearing and the displacement of the ring thrust, and one force sensor for monitoring the axial thrust of the main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020477321.1U CN211477612U (en) | 2020-04-03 | 2020-04-03 | Testing system for floating thrust bearing of axial flow turbine supercharger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020477321.1U CN211477612U (en) | 2020-04-03 | 2020-04-03 | Testing system for floating thrust bearing of axial flow turbine supercharger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114577476A (en) * | 2022-03-08 | 2022-06-03 | 重庆江增船舶重工有限公司 | Sensor installation system and installation method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114577476A (en) * | 2022-03-08 | 2022-06-03 | 重庆江增船舶重工有限公司 | Sensor installation system and installation method thereof |
| CN114577476B (en) * | 2022-03-08 | 2024-04-09 | 重庆江增船舶重工有限公司 | Sensor mounting system and mounting method thereof |
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