CN203343805U - Hydrostatic bearing oil film thickness control system - Google Patents
Hydrostatic bearing oil film thickness control system Download PDFInfo
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- CN203343805U CN203343805U CN 201320396500 CN201320396500U CN203343805U CN 203343805 U CN203343805 U CN 203343805U CN 201320396500 CN201320396500 CN 201320396500 CN 201320396500 U CN201320396500 U CN 201320396500U CN 203343805 U CN203343805 U CN 203343805U
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- film thickness
- oil film
- hydrostatic bearing
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Abstract
The utility model relates to hydrostatic support technology and speed and volume composite adjustment technology, in particular to a hydrostatic bearing oil film thickness control system, and aims to solve the problems that oil film thickness of a hydrostatic bearing is unstable and processing accuracy and processing efficiency are affected when load or working condition of a machine tool is changed due to interference or human factors caused by the fact that the oil film thickness of a traditional hydrostatic bearing is uncontrollable. An actual oil film thickness signal is processed through a DSP (digital signal processing) signal collecting and processing controller, then deviation between the actual oil film thickness signal and a received given oil film thickness signal is solved, finally a control signal is outputted to a machine-tool numerical control system, and the machine-tool numerical control system sends a speed control signal and a displacement control signal to a frequency converter and a servo variable capacity pump respectively. High-efficiency fast response control on output flow of an oil supply system is realized through dual adjustments of the speed and the displacement, and the purpose of controlling the oil film thickness of the hydrostatic bearing is achieved finally. The system is applicable to a vertical lathe for hydrostatic bearings.
Description
Technical field
The utility model relates to fluid pressure support technology and the compound regulation technology of rotating speed volume, is specifically related to a kind of hydrostatic bearing oil film thickness controlling system.
Background technology
Hydrodynamic journal liquid polymers are as the axial support of worktable rotary, oil supply system forces to send hydraulic oil into the oil pocket between workbench and base, the gap that oil pocket sealing oil edge and floral disc form produces throttling action, thereby make fluid there is bearing capacity, workbench is floated, between workbench and base, form oil film.When thickness is excessive, the oil film rigidity of hydrostatic bearing is low, poor stability, and machining accuracy is restricted and the work of oil supply system high load capacity, and energy consumption and power loss are large, and working life is short; Oil film thickness is crossed when thin, and workbench easily produces dry friction, and the danger of the wound of grinding is arranged.The traditional liquid hydrostatic bearing, oil film thickness is uncontrollable, and when load or working conditions change, oil film thickness is unstable, affects machining accuracy and working (machining) efficiency.
The utility model content
The utility model is that the oil film thickness in order to solve the traditional liquid hydrostatic bearing is uncontrollable, in the load of lathe or operating mode is interfered or human factor and while changing, the oil film thickness of hydrostatic bearing is unstable, affect the problem of machining accuracy and working (machining) efficiency, the utility model provides a kind of hydrostatic bearing oil film thickness controlling system.
The hydrostatic bearing oil film thickness controlling system, it comprises DSP signals collecting and processing controller, machine tool numerical control system, oil supply system, hydrostatic bearing and current vortex sensor; Described oil supply system comprises servo variable pump and buncher unit, and described buncher unit comprises alternating current generator and frequency converter; the speed controling signal output of described machine tool numerical control system is connected with the signal input part of frequency converter, the signal output part of described frequency converter is connected with the control signal input of alternating current generator, described alternating current generator is for driving the servo variable displacement pump work, the displacement control signal input part of described servo variable pump is connected with the displacement control signal output part of machine tool numerical control system, the oil of described servo variable pump output is for controlling the lifting of hydrostatic bearing, described current vortex sensor is for gathering the oil film thickness signal of hydrostatic bearing, the oil film thickness signal output part of described current vortex sensor is connected with the actual oil film thickness signal input part of DSP signals collecting and processing controller, the control signal output of described DSP signals collecting and processing controller is connected with the control signal input of machine tool numerical control system by Ethernet, being connected with the fixed oil film thickness signal input part of giving of DSP signals collecting and processing controller by Ethernet to the fixed oil film thickness signal output part of described machine tool numerical control system.
Hydrostatic bearing oil film thickness controlling system described in the utility model is processed and has been improved the oil film thickness signal quality the signal of actual oil film thickness by DSP signals collecting and processing controller, makes it can be used as controlled device and can realize effective observation; Realize high efficiency fast-response Flow-rate adjustment by the servo variable displacement pump frequency converting speed regulating, finally realize the controlled of hydrostatic bearing oil film thickness.
The beneficial effect that the utility model brings is, it is controlled that hydrostatic bearing oil film thickness controlling system described in the utility model is realized the oil film thickness of hydrodynamic journal liquid polymers, when the load of lathe or operating mode are received interference or human factor and are changed, the oil film thickness of its hydrostatic bearing can remain unchanged, thereby has guaranteed machining accuracy and efficiency; Make machining accuracy and working (machining) efficiency improve respectively 10% and 20%, can produce added benefit simultaneously, obtain high-quality oil film thickness signal by DSP signals collecting and processing controller, can realize effectively observation in real time, use ethernet communication between DSP signals collecting and processing controller and machine tool numerical control system, improved modularization and versatility, flexible.
The accompanying drawing explanation
The electrical principle schematic diagram that Fig. 1 is hydrostatic bearing oil film thickness controlling system described in the utility model.
The electrical principle schematic diagram that Fig. 2 is the described DSP signals collecting of the specific embodiment two and processing controller.
The specific embodiment
The specific embodiment one: present embodiment is described referring to Fig. 1, the described hydrostatic bearing oil film thickness controlling system of present embodiment, it comprises DSP signals collecting and processing controller 1, machine tool numerical control system 2, oil supply system, hydrostatic bearing 6 and current vortex sensor 7; Described oil supply system comprises servo variable pump 5 and buncher unit, and described buncher unit comprises alternating current generator 4 and frequency converter 3; the speed controling signal output of described machine tool numerical control system 2 is connected with the signal input part of frequency converter 3, the signal output part of described frequency converter 3 is connected with the control signal input of alternating current generator 4, described alternating current generator 4 is for driving servo variable pump 5 work, the displacement control signal input part of described servo variable pump 5 is connected with the displacement control signal output part of machine tool numerical control system 2, the oil of described servo variable pump 5 outputs is for controlling the lifting of hydrostatic bearing 6, described current vortex sensor 7 is for gathering the oil film thickness signal of hydrostatic bearing 6, the oil film thickness signal output part of described current vortex sensor 7 is connected with the actual oil film thickness signal input part of DSP signals collecting and processing controller 1, the control signal output of described DSP signals collecting and processing controller 1 is connected with the control signal input of machine tool numerical control system 2 by Ethernet, being connected with the fixed oil film thickness signal input part of giving of DSP signals collecting and processing controller 1 by Ethernet to the fixed oil film thickness signal output part of described machine tool numerical control system 2.
The specific embodiment two: present embodiment is described referring to Fig. 1 and 2, the difference of present embodiment and the described hydrostatic bearing oil film thickness controlling system of the specific embodiment one is, described DSP signals collecting and processing controller 1 comprise frequency overlapped-resistable filter 8, differential amplifying device 9, A/D converter 10, digital filtering algorithm module 11, D/A converter 12, comparator 13 and control module 14; the signal input part of described frequency overlapped-resistable filter 8 is connected with the oil film thickness signal output part of current vortex sensor 7, the actual oil film thickness signal input part that the signal input part of described frequency overlapped-resistable filter 8 is DSP signals collecting and processing controller 1, the signal output part of described frequency overlapped-resistable filter 8 is connected with the signal input part of differential amplifying device 9, the signal output part of described differential amplifying device 9 is connected with the input end of analog signal of A/D converter 10, the digital signal output end of described A/D converter 10 is connected with the filtering signal input of digital filtering algorithm module 11, the filtering signal output of described digital filtering algorithm module 11 is connected with the first signal input of comparator 13, the secondary signal input of described comparator 13 is connected with the fixed oil film thickness signal output part of giving of machine tool numerical control system 2, the comparison signal output of described comparator 13 is connected with the signal input part of control module 14, the signal output part of described control module 14 is connected with the digital signal input end of D/A converter 12, the analog signal output of described D/A converter 12 is connected with the control signal input of machine tool numerical control system 2, the control signal output that the analog signal output of described D/A converter 12 is DSP signals collecting and processing controller 1, the secondary signal input of described comparator 13 be DSP signals collecting and processing controller 1 give the fixed oil film thickness signal input part.
In present embodiment, the oil film thickness signal quality of current vortex sensor 7 outputs is poor, can't truly reflect actual oil film thickness, can not be as effective observation of feedback signal and oil film state, therefore, mainly by the actual oil film thickness signal that uses DSP signals collecting and 1 pair of processing controller to receive, processed, what the oil film thickness signal after processing and DSP signals collecting and processing controller 1 are received asks deviation to the fixed oil film thickness signal simultaneously, last DSP signals collecting and processing controller 1 output control signal are controlled machine tool numerical control system 2, signal transmission between DSP signals collecting and processing controller 1 and machine tool numerical control system 2 realizes by Ethernet, machine tool numerical control system 2 output speed control signals are to frequency converter 3, and these machine tool numerical control system 2 output displacement control signals are to servo variable pump 5, realize the high efficiency fast-response control of oil supply system output flow by two adjustings of rotating speed and discharge capacity, finally reach hydrostatic bearing oil film thickness purpose.
Described digital filtering algorithm module 11 can adopt existing techniques in realizing, such as methods such as employing Butterworth digital filterings.
Described control module 14 is prior art, such as adopting traditional control strategies such as PID control, fuzzy control or robust control.
The specific embodiment three: present embodiment is described referring to Fig. 1 and 2, the difference of present embodiment and the described hydrostatic bearing oil film thickness controlling system of the specific embodiment one or two is, described DSP signals collecting and processing controller 1 employing chip TMS320F28335 realization.
The specific embodiment four: referring to Fig. 1 and 2, present embodiment is described, the difference of present embodiment and the described hydrostatic bearing oil film thickness controlling system of the specific embodiment one or two is, described A/D converter 10 employing chip AD7609 realizations.
The specific embodiment five: referring to Fig. 1 and 2, present embodiment is described, the difference of present embodiment and the described hydrostatic bearing oil film thickness controlling system of the specific embodiment one or two is, described D/A converter 12 employing chip AD5754R realizations.
The specific embodiment six: referring to Fig. 1 and 2, present embodiment is described, the difference of present embodiment and the described hydrostatic bearing oil film thickness controlling system of the specific embodiment two is, described frequency overlapped-resistable filter 8 is active anti-aliasing filter.
Claims (2)
1. the hydrostatic bearing oil film thickness controlling system, is characterized in that, it comprises DSP signals collecting and processing controller (1), machine tool numerical control system (2), oil supply system, hydrostatic bearing (6) and current vortex sensor (7); Described oil supply system comprises servo variable pump (5) and buncher unit, and described buncher unit comprises alternating current generator (4) and frequency converter (3); the speed controling signal output of described machine tool numerical control system (2) is connected with the signal input part of frequency converter (3), the signal output part of described frequency converter (3) is connected with the control signal input of alternating current generator (4), described alternating current generator (4) is for driving servo variable pump (5) work, the displacement control signal input part of described servo variable pump (5) is connected with the displacement control signal output part of machine tool numerical control system (2), the oil of described servo variable pump (5) output is for controlling the lifting of hydrostatic bearing (6), described current vortex sensor (7) is for gathering the oil film thickness signal of hydrostatic bearing (6), the oil film thickness signal output part of described current vortex sensor (7) is connected with the actual oil film thickness signal input part of DSP signals collecting and processing controller (1), the control signal output of described DSP signals collecting and processing controller (1) is connected with the control signal input of machine tool numerical control system (2) by Ethernet, being connected with the fixed oil film thickness signal input part of giving of DSP signals collecting and processing controller (1) by Ethernet to the fixed oil film thickness signal output part of described machine tool numerical control system (2).
2. hydrostatic bearing oil film thickness controlling system according to claim 1, is characterized in that, described DSP signals collecting and processing controller (1) adopt chip TMS320F28335 to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320396500 CN203343805U (en) | 2013-07-04 | 2013-07-04 | Hydrostatic bearing oil film thickness control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320396500 CN203343805U (en) | 2013-07-04 | 2013-07-04 | Hydrostatic bearing oil film thickness control system |
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| CN203343805U true CN203343805U (en) | 2013-12-18 |
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| CN 201320396500 Withdrawn - After Issue CN203343805U (en) | 2013-07-04 | 2013-07-04 | Hydrostatic bearing oil film thickness control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949894A (en) * | 2014-05-12 | 2014-07-30 | 安徽工程大学 | Device and system for controlling oil film thickness of lathe open hydrostatic guideway |
| CN103341781B (en) * | 2013-07-04 | 2015-08-19 | 哈尔滨理工大学 | Hydrostatic bearing oil film thickness controlling system |
| CN106705913A (en) * | 2016-12-01 | 2017-05-24 | 北京环世兴宇科技有限公司 | Online detection method for oil film thickness of oil film bearing |
| CN109108670A (en) * | 2018-04-27 | 2019-01-01 | 湖北工业大学 | When a kind of under variable working condition static pressure workbench oil film thickness adjust and control method |
-
2013
- 2013-07-04 CN CN 201320396500 patent/CN203343805U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341781B (en) * | 2013-07-04 | 2015-08-19 | 哈尔滨理工大学 | Hydrostatic bearing oil film thickness controlling system |
| CN103949894A (en) * | 2014-05-12 | 2014-07-30 | 安徽工程大学 | Device and system for controlling oil film thickness of lathe open hydrostatic guideway |
| CN106705913A (en) * | 2016-12-01 | 2017-05-24 | 北京环世兴宇科技有限公司 | Online detection method for oil film thickness of oil film bearing |
| CN106705913B (en) * | 2016-12-01 | 2019-05-14 | 北京环世兴宇科技有限公司 | A kind of filmatic bearing oil film thickness online test method |
| CN109108670A (en) * | 2018-04-27 | 2019-01-01 | 湖北工业大学 | When a kind of under variable working condition static pressure workbench oil film thickness adjust and control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131218 Effective date of abandoning: 20150819 |
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| RGAV | Abandon patent right to avoid regrant |