CN102944351B - Method for detecting oil film pressure in floating-ring bearing - Google Patents

Method for detecting oil film pressure in floating-ring bearing Download PDF

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Publication number
CN102944351B
CN102944351B CN201210514630.1A CN201210514630A CN102944351B CN 102944351 B CN102944351 B CN 102944351B CN 201210514630 A CN201210514630 A CN 201210514630A CN 102944351 B CN102944351 B CN 102944351B
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pressure sensor
floating
ring bearing
wireless
wireless pressure
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CN102944351A (en
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杨伟东
师占群
张顺心
张�浩
姚莉楠
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Hebei University of Technology
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Hebei University of Technology
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Abstract

The invention discloses a method for detecting oil film pressure in a floating-ring bearing. The method comprises the following process steps of: 1. manufacturing a specific rotor shaft, and forming at least one radial blind hole used for mounting a wireless pressure sensor in the shaft, wherein the diameter and the depth of each radial blind hole are matched with those of the wireless pressure sensor; 2. mounting the wireless pressure sensor in the specific rotor shaft; 3. mounting the specific rotor shaft and the floating-ring bearing on a floating-ring bearing measuring platform; 4. obtaining the oil film pressure data in the floating-ring bearing by utilizing the wireless pressure sensor; 5. transmitting the obtained data through a wireless communication unit in the wireless pressure sensor and a wireless communication unit of an upper computer, or transmitting the obtained data through an SD card storage unit in the wireless pressure sensor and an SD card storage unit of the upper computer; and 6. calculating radial distribution and axial distribution rules of the oil film pressure in the floating-ring bearing through signal processing software programmed by the upper computer.

Description

Oil film pressure detection method in a kind of floating-ring bearing
Technical field
The present invention relates to physical features measuring technique, be specially oil film pressure distribution detection method in a kind of floating-ring bearing.
Background technology
Along with turbocharging technology obtains applying more and more widely, its high failure rate also becomes the focus that people pay close attention to.Statistics display, the vehicle that turbosupercharger is housed has remarkable increase than the vehicle trouble rate without turbosupercharger, and increases along with the increase of lifespan.In transportation by railroad, turbocharger failure accounts for 20% of total machine maintenance amount.These all illustrate, improve turbosupercharger stability be ensure various vehicle long-term safety run in a Key Scientific And Technical Problems in the urgent need to address.
Although turbocharger failure form has multiple, a large amount of statistics both domestic and external shows, lubrication and cooling failure and rotor and bearing touch two kinds of major failure forms that unstability of rubbing is turbosupercharger.In the statistics of Hall Saite company of internationally famous turbosupercharger manufacturer, being lost efficacy to be classified as by floating-ring bearing especially there is maximum failure modes.The research which illustrated for floating-ring bearing performance is the key in key.
Research shows, interior oil film pressure distribution rule directly affects the reliability of institute's Modling model.At present because turbocharger operation is under high temperature, high speed and heterogeneous fluid environment, its rotor and floating ring are all among rotation, sensor cannot be placed, its signal is also difficult to transmission out, oil film pressure distribution rule in floating-ring bearing is caused to there is no feasible detection method at present, lack verification experimental verification understanding for oil film pressure distribution rule in floating-ring bearing, this disappearance also directly governs the observation and analysis to its oil-poor mechanism.
Summary of the invention
For the deficiencies in the prior art, the technical matters that quasi-solution of the present invention is determined is, oil film pressure detection method in a kind of floating-ring bearing is provided, this detection method can at rotor and floating ring all in rotation process, the regularity of distribution of oil film pressure in true detection floating-ring bearing, have method simple, applicability is good, is convenient to the features such as popularization.
The technical scheme that the present invention solve the technical problem is, design oil film pressure detection method in a kind of floating-ring bearing, this detection method adopts following technique:
(1) a special armature spindle is made; And on this special armature spindle, beat at least one for installing the radial blind holes of wireless pressure sensor, the diameter of radial blind holes and the degree of depth and wireless pressure sensor match;
(2) at the embedded installation wireless pressure sensor of special armature spindle, this wireless pressure sensor is the measurement data acquisition treating apparatus based on single-chip microcomputer/ARM;
(3) special armature spindle and floating-ring bearing are installed on floating-ring bearing measuring table;
(4) described wireless pressure sensor is utilized to obtain this floating-ring bearing inner membrance pressure data;
(5) complete by the radio communication unit in the wireless detection device of radio communication unit and host computer in described wireless pressure sensor transmission wireless pressure sensor being obtained to data; Or complete by the SD card read-write cell of SD card storage unit and host computer in described wireless pressure sensor transmission wireless pressure sensor being obtained to data;
(6) signal processing software by writing at host computer calculates radial distribution and the axial distribution rule of oil film pressure in floating-ring bearing.
Compared with prior art, in floating-ring bearing of the present invention, oil film pressure detection method solves because turbocharger operation is under high temperature, high speed and heterogeneous fluid environment, its rotor and floating ring are all among rotation, sensor cannot be placed, its signal is also difficult to transmission out, cause the difficult problem that in floating-ring bearing, oil film pressure distribution rule cannot detect, and it is simple to have method, applicability is good, is convenient to the features such as popularization.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of a kind of embodiment of oil film pressure detection method in floating-ring bearing of the present invention.Wherein, Fig. 1 (1) is for special armature spindle being installed the detection method system architecture schematic diagram of multiple wireless pressure sensor; Fig. 1 (2) is for special armature spindle only being installed the detection method system architecture schematic diagram of 1 wireless pressure sensor.
Fig. 2 is the wireless pressure sensor modular structure schematic diagram of a kind of embodiment of oil film pressure detection method in floating-ring bearing of the present invention.
Fig. 3 is the upper computer module structural representation of a kind of embodiment of oil film pressure detection method in floating-ring bearing of the present invention.
Fig. 4 is that structural representation faced by the floating-ring bearing measuring table of a kind of embodiment of oil film pressure detection method in floating-ring bearing of the present invention.
Fig. 5 is the special rotor structure schematic diagram of a kind of embodiment of oil film pressure detection method in floating-ring bearing of the present invention.
Embodiment
The present invention is described further below in conjunction with embodiment and accompanying drawing thereof.
Oil film pressure detection method (being called for short detection method, see Fig. 1-5) in the floating-ring bearing of the present invention's design, this detection method comprises following process: for detecting the regularity of distribution of oil film pressure in floating-ring bearing,
(1) a special armature spindle is made
First, a special armature spindle 4 is made; This special armature spindle 4 selection intensity and the higher material of ratio of rigidity, and need to there is very high machining precision and assembly precision, because the quality of fit between itself and floating-ring bearing 1 directly has influence on rotating accuracy, the formation of oil film pressure and the static and dynamic characteristics of this floating-ring bearing 1.Secondly, this special armature spindle 4 is beaten at least one for installing the radial blind holes 41 of wireless pressure sensor 3, profile and the quantity of the diameter of radial blind holes 41, the degree of depth and quantity and wireless pressure sensor 2 match.Material in this special armature spindle 4 embodiment adopts 40Cr.Consider that the cooperation of installing floating-ring bearing bearing 1 and shaft coupling 8 is convenient, this special armature spindle 4 profile design is multidiameter.
(2) at radial direction at least setting-in wireless pressure sensor of special armature spindle
Wireless pressure sensor 3 is placed on or is embedded in the radial blind holes 41(of special armature spindle 4 see Fig. 5) in, and adopt threaded connection mode to be fixed on special armature spindle 4.The usage quantity of wireless pressure sensor 3 of the present invention is determined according to designing requirement.The number of the wireless pressure sensor 3 of embodiment can be 1.It is applicable to the radial direction of corresponding position floating-ring bearing bearing 1 to wireless pressure sensor 3 or the two-dimensional detection of circumference; When employing more than 2 wireless pressure sensors 3 (see Fig. 1 (1)), wireless pressure sensor 3 can uniformly vertically be arranged on special armature spindle 4.This also means that the quantity of radial blind holes 41 is consistent with wireless pressure sensor 3 with distribution.It is applicable to the axial two-dimensional detection of the corresponding position floating-ring bearing 1 to wireless pressure sensor 3; When the quantity of wireless pressure sensor 3 and mounting design can detect the circumferential and axial of floating-ring bearing 1 simultaneously, the three-dimensional values of oil film pressure in floating-ring bearing 1 can be realized.Certainly, when employing 1 wireless pressure sensor 3 carries out radial two-dimensional detection, special armature spindle 4 can be designed and do axially reciprocating (see Fig. 1 (2)), thus complete the three-dimensional values of oil film pressure in floating-ring bearing 1.
Described wireless pressure sensor 3 is the measurement data acquisition treating apparatus based on single-chip microcomputer/ARM, and it has the functions such as data acquisition, amplification conditioning, A/D conversion, storage and wireless transmission, is prior art.The type of described wireless pressure sensor 3 can be based on piezoelectric type or based on capacitive wireless pressure sensor.In the present invention, do not make strict regulations to the material of wireless pressure sensor 3, embodiment have employed piezoelectric film material.When an employing wireless pressure sensor 3, this wireless pressure sensor 3 is arranged in special armature spindle 4, for the same section oil film pressure suffered by this floating-ring bearing 1 is converted to electric signal and exports this electric signal; When adopting two or more wireless pressure sensor 3, wireless pressure sensor 3 is distributed in special armature spindle 4 vertically, for the different cross section place oil film pressure suffered by this floating-ring bearing is converted to electric signal and exports this electric signal.
(3) this special armature spindle and floating-ring bearing are installed on a floating-ring bearing measuring table
Floating-ring bearing measuring table of the present invention is for providing the experimental situation measured and need.This platform is prior art substantially, mainly comprise motor 7, shaft coupling 8, bearing seat 2, special armature spindle 4, pedestal 6 and oil servicing facitities (not shown in FIG.), wherein, bearing seat 2 is provided with an oil supply hole 9 and an oil outlet 10, oil servicing facitities includes transfer pump.In described platform, do not do strict restriction, but comprise at least two bearing seats 2 to the number of bearing seat 2, the concrete number that arranges decides according to needing the number of the floating-ring bearing measured.For the number of oil servicing facitities, the present invention does not do strict restriction yet, and the number of oil servicing facitities is relevant with needing the number of the floating-ring bearing measured.Wherein motor 7, shaft coupling 8, hydraulic cylinder, frequency converter, pressure control valve (not drawing in the drawings) are all standard component, require to choose according to measuring and design.
Floating-ring bearing measuring table in embodiment comprises a motor 7, shaft coupling 8, two bearing seats 2, pedestal 6, special armature spindle 4 and an oil servicing facitities, the shaft coupling 8 that rotates through of motor 7 drives special armature spindle 4 High Rotation Speed, is conducive to dynamic pressure distribution and the dynamic perfromance of studying oil film; Oil servicing facitities can continue to provide oil pressure, both can help to form oil film, reduce oil temperature, can prevent again special armature spindle 4 in High Rotation Speed with MEMS pressure sensitive unit generation dry friction in wireless pressure sensor 3, improve serviceable life of wireless pressure sensor 3.
(4) described wireless pressure sensor is utilized to obtain this floating-ring bearing inner membrance pressure data
When this floating-ring bearing measuring table normally works, after MEMS pressure sensitive unit in wireless pressure sensor 3 is subject to the pressure of floating-ring bearing 1 and special armature spindle 4, have electric charge to produce, from the electric signal that MEMS pressure sensitive unit exports, through amplifying modulate circuit, this faint electricity is amplified, become the continually varying analog quantity that amplitude is appropriate, this analog quantity is converted to the digital quantity with its equivalent through A/D change-over circuit, digital assay process is carried out in input microprocessor, the wireless transmission to this signal is completed by radio communication unit, simultaneously also can complete real-time storage to this signal by SD card storage unit.Radio communication method can adopt based on ZIGBEE, infrared, the wireless radio-frequency such as bluetooth, Wi-Fi or RF.Which kind of wireless transmission technology of concrete employing is not particularly limited, and is also not particularly limited for SD card memory technology.
(5) complete by the radio communication unit in the wireless detection device of radio communication unit and host computer 5 in described wireless pressure sensor 3 transmission wireless pressure sensor 3 being obtained to data; Described host computer 5 is based on the radio communication unit in the wireless detection device of PC, is prior art; Or also can complete by the SD card read-write cell of SD card storage unit and host computer 5 in described wireless pressure sensor 3 transmission wireless pressure sensor being obtained to data, described host computer is the SD card read-write cell in the wireless detection device of Based PC, is prior art;
(6) signal processing software by writing at host computer, calculates the Pattern of Radial Distribution Pattern of interior oil film pressure during floating-ring bearing 1 installation 1 described wireless pressure sensor 3, solves oil film pressure Two dimensional Distribution test problems in floating-ring bearing 1; When the signal processing software that host computer is write also can calculate and install multiple described wireless pressure sensor 3, the radial and axial regularity of distribution of oil film pressure in floating-ring bearing 1, solves oil film pressure distributed in three dimensions test problems in floating-ring bearing 1.Described signal processing software is existing products.
Principle of work and the process of detection method are: the present invention adopts and is arranged in the radial blind holes 41 of special armature spindle 4 by wireless pressure sensor 3, they rotate with special armature spindle 4, can obtain wireless pressure sensor 3 place place continuous print radial pressure and axial distribution.Complete by MEMS sensing element with based on the measurement data acquisition treating apparatus of single-chip microcomputer/ARM in this wireless pressure sensor 3, in the real-time floating-ring bearing measured, oil film pressure data are stored in SD card, simultaneously also by the radio communication unit in this device and host computer---complete based on radio communication unit in the wireless detection device of PC and oil film pressure data in measurement are in real time delivered to host computer, in host computer, information processing is carried out to oil film pressure data in the wireless pressure sensor 3 obtained, the conversion of time-domain signal to space-domain signal is realized by the signal processing software write in host computer, thus in reconstruct floating-ring bearing oil film two dimension or three-dimensional pressure distribution curve, to solve in floating-ring bearing 1 oil film because inside and outside surface in contact is all in rotation, it cannot place wireless pressure sensor 3, signal is difficult to transmission out, the difficult problem cannot measured oil film pressure in floating-ring bearing 1.
Though the present invention addresses oil film pressure detection method in floating-ring bearing, it, for the measurement of general rotating machinery dynamic perfromance, also provides a kind of lossless detection method,
The present invention does not address part and is applicable to prior art.

Claims (2)

1. an oil film pressure detection method in floating-ring bearing, this detection method adopts following technique:
(1) multidiameter is made; And on this multidiameter, beat at least one for installing the radial blind holes of wireless pressure sensor, the diameter of radial blind holes and the degree of depth and wireless pressure sensor match;
(2) at the embedded installation wireless pressure sensor of multidiameter, wireless pressure sensor is placed on or is embedded in the radial blind holes of multidiameter; When the number of wireless pressure sensor is 1, it is applicable to the radial direction of oil film pressure or the two-dimensional detection of circumference in the corresponding position floating-ring bearing to wireless pressure sensor; When 1 wireless pressure sensor does axially reciprocating along multidiameter, complete the three-dimensional values of oil film pressure in floating-ring bearing; When employing more than 2 wireless pressure sensors, wireless pressure sensor is uniform to be vertically arranged on multidiameter, is applicable to the axial two-dimensional detection of the corresponding position floating-ring bearing to wireless pressure sensor; When employing more than 2 wireless pressure sensors, wireless pressure sensor is arranged on multidiameter with radial equipartition vertically, realizes the three-dimensional values of oil film pressure in floating-ring bearing; This wireless pressure sensor is the measurement data acquisition treating apparatus based on single-chip microcomputer/ARM;
(3) multidiameter and floating-ring bearing are installed on floating-ring bearing measuring table;
(4) described wireless pressure sensor is utilized to obtain this floating-ring bearing inner membrance pressure data;
(5) complete by the radio communication unit in the wireless detection device of radio communication unit and host computer in described wireless pressure sensor transmission wireless pressure sensor being obtained to data, or complete by the SD card read-write cell of SD card storage unit and host computer in described wireless pressure sensor transmission wireless pressure sensor being obtained to data;
(6) signal processing software by writing at host computer calculates radial distribution and the axial distribution rule of oil film pressure in floating-ring bearing.
2. an oil film pressure detection method in floating-ring bearing according to claim 1, is characterized in that the measurement of this detection method for general rotating machinery dynamic perfromance.
CN201210514630.1A 2012-12-04 2012-12-04 Method for detecting oil film pressure in floating-ring bearing Active CN102944351B (en)

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CN108692800A (en) * 2017-03-31 2018-10-23 井关农机株式会社 The grain Weight-measuring device of grain drier
CN108593189B (en) * 2018-05-15 2020-06-26 江苏大学 Pressure measuring device and method for oil throwing hole of rotary lubricating oil channel

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