CN103573633A - Experiment table for equivalently observing dynamic leakage of working fluid inside rotary compressor - Google Patents
Experiment table for equivalently observing dynamic leakage of working fluid inside rotary compressor Download PDFInfo
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- CN103573633A CN103573633A CN201310585810.3A CN201310585810A CN103573633A CN 103573633 A CN103573633 A CN 103573633A CN 201310585810 A CN201310585810 A CN 201310585810A CN 103573633 A CN103573633 A CN 103573633A
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Abstract
An experiment table for equivalently observing dynamic leakage of a working fluid inside a rotary compressor comprises a high-voltage motor, a high-pressure piston cylinder, a photographic instrument, an equivalent leakage channel simulating device, a low-pressure piston cylinder, a low-voltage motor and a real-time controller, wherein the high-voltage motor and the low-voltage motor are electrically connected with the real-time controller respectively; output shafts of the high-voltage motor and the low-voltage motor are welded with piston rods of the high-pressure piston cylinder and low-pressure piston cylinder respectively; the other end of the high-pressure piston cylinder is communicated with an air inlet of the equivalent leakage channel simulating device; the other end of the low-pressure piston cylinder is communicated with an air outlet of the equivalent leakage channel simulating device; the photographic instrument is arranged on the outer side of an observing window of the equivalent leakage channel simulating device. The experiment table better solves the problem that a leakage condition of the working fluid inside the compressor is observed and measured under working conditions of a dynamic pressure difference and a dynamic clearance.
Description
Technical field
The present invention relates to compressor leakage characteristic test technical field, specifically a kind of rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture.
Background technique
Research shows, inner a plurality of matching gaps of rotary compressor exist leaks, and owing to there being compressor external casing sealed envelope, cannot observe and measure its leakage situation everywhere and leakage rate under the working state running up.During the work of rotary compressor internal mechanism, the actual conditions of dynamic leakage are: (1) exists dynamic leakage gap, be that compressor leakage-gap situation is in the course of the work dynamic change between 5 microns to 50 microns, and two apparent surfaces of leakage-gap have the linear velocity of certain relative movement, that is to say that leakage-gap is to form between the surface of two relative movement, leakage-gap is the dynamic leakage gap of different speed of related movements; (2) have dynamic differential pressure, the pressure in air aspiration cavity and exhaust cavity is also real-time change, thereby in the leakage-gap both sides of air aspiration cavity and exhaust cavity, has produced the dynamic differential pressure of real-time change.(3) because there is the existence of lubricant oil, between leakage-gap, there is the different shape of air-fuel mixture.Current experiment is in fixed interval (FI) substantially and fixedly under the environment of pressure reduction, completes, all the real work operating mode of analog compression machine really.Therefore the dynamic leakage under dynamic differential pressure carries out equivalent measurement to actual compressor internal working medium to need a kind of experimental provision.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture, it can equivalent simulation compressor three class operating modes: during compressor operating dynamic differential pressure, the leakage way gap length between air aspiration cavity and exhaust cavity change, this three classes operating mode of variation of rotor stator speed of related movement.In simulation, realize two functions under this three classes operating mode: the one, quantity of gas leakage is measured, in the situation that dynamic differential pressure and the dynamic leakage gap between air aspiration cavity and exhaust cavity during the work of analog compression machine, the quantitative measurment to Leakage Gas; The 2nd, the High Speed Photography of working medium state, in the situation that dynamic differential pressure and the dynamic leakage gap between analog compression machine when work air aspiration cavity and exhaust cavity, the shooting to gap air-fuel mixture form cloud atlas.
The present invention achieves the above object by the following technical programs: a kind of rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture, rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture, comprise high voltage terminal motor, high-pressure piston cylinder, phototropic vision, leakage way equivalent simulation device, low pressure piston cylinder, low voltage terminal motor and real-time controller, described high voltage terminal motor, low voltage terminal motor is electrically connected to real-time controller respectively, and its output shaft respectively with high-pressure piston cylinder, the piston rod welding of low pressure piston cylinder, the other end of high-pressure piston cylinder is communicated with the suction port of leakage way equivalent simulation device, the other end of low pressure piston cylinder is communicated with the relief opening of leakage way equivalent simulation device, described phototropic vision is located at the eyeglass outside of leakage way equivalent simulation device.
Described leakage way equivalent simulation device is comprised of stator, rotor, eyeglass, rotor electric machine, elastic coupling flexible coupling, bearing, push rod, housing, micro-control push-rod electric machine, described eyeglass closed set is between housing and stator, eyeglass outside is provided with phototropic vision, the cavity on the rotor left side is hyperbaric chamber, the cavity on rotor the right is low-pressure cavity, and the gap forming between rotor and stator is compressor simulated leakage passage; By from left to right, rotor electric machine, elastic coupling flexible coupling, rotor, bearing, push rod, housing, micro-control push-rod electric machine connect successively; Described rotor electric machine, micro-control push-rod electric machine are electrically connected to real-time controller respectively, control by real-time controller to high voltage terminal motor, low voltage terminal motor, micro-control push-rod electric machine and rotor electric machine, the simulation of dynamic clearance while utilizing adjustable relative rotation speed and gap to realize the work of rotary compressor internal working medium, thereby by regulating the volume of hyperbaric chamber, low-pressure cavity to come pilot pressure to change the simulation that realizes dynamic differential pressure, realize the equivalence that rotary compressor internal working medium is leaked and observe and measure.
The adjusting of described simulated leakage path clearance, by the left and right hydrodynamic reciprocating sealing housing of micro-control push-rod electric machine, then drives push rod and bearing extruding, loosens rotor, makes rotor produce Horizontal displacement, thereby realizes the adjusting of simulated leakage gap length.In experiment, can change rotor speed by rotor electric machine, thereby realize the simulation of dynamic clearance.
The adjusting of described dynamic differential pressure is injected pressurized gas and low-pressure gas respectively by suction valve and outlet valve in the hyperbaric chamber of leakage way equivalent simulation device and low-pressure cavity, then closes suction valve and outlet valve, and described suction valve and outlet valve are three-way valve.By regulating high voltage terminal motor to produce active force to the left or to the right, make the high-pressure piston cylinder volume being communicated with hyperbaric chamber become large or reduce, by volume adjusted size, carry out pilot pressure size, described high voltage terminal motor is push-rod electric machine or linear electric motor.During work, the hyperbaric chamber pressure of requirement of experiment is changed to function and input to real-time controller, real-time controller changes function by hyperbaric chamber pressure and is converted into electrical signal and exports to high voltage terminal motor, thereby high voltage terminal motor is received electrical signal and is produced active force, make the piston in high-pressure piston cylinder produce left and right displacement, thereby increase, reduce the volume of hyperbaric chamber, and then the pressure in hyperbaric chamber is changed, and the hyperbaric chamber pressure that makes the variation of hyperbaric chamber pressure meet requirement of experiment changes function; When having gas to leak into low-pressure cavity by equivalent leakage-gap from hyperbaric chamber, back pressure transducer measures at once pressure and becomes large signal, and feed back to real-time controller, real-time controller, through converting, sends a control signal to low voltage terminal motor, the displacement to the right of the piston of control piston cylinder at once, it is large that low-pressure cavity becomes, recover low pressure, thereby realize the stable of low-pressure cavity pressure, described low voltage terminal motor is push-rod electric machine or linear electric motor.So just between hyperbaric chamber and low-pressure cavity, form a dynamic differential pressure that experiment is required.
Working principle and the process of described rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture are: first by micro-control push-rod electric machine, complete the adjusting of simulated leakage path clearance, then by suction valve and outlet valve respectively toward hyperbaric chamber, low-pressure cavity is injected respectively pressurized gas and low-pressure gas, close suction valve and outlet valve, by regulating high voltage terminal motor and low voltage terminal motor, complete the adjusting of dynamic differential pressure, start rotor electric machine, complete the adjusting in dynamic leakage gap, finally pass through real-time controller, according to the pressure of back pressure transducer, change, carrying out the conversion of quantity of gas leakage measures, obtain gap, rotating speed, refrigerant leakage amount under pressure reduction dynamic change, meanwhile, by phototropic vision, see through eyeglass the air-fuel mixture cloud atlas of dynamic clearance is taken, thereby complete the observation of rotary compressor internal working medium dynamic leakage.
Outstanding technique effect of the present invention is:
Control by real-time controller to high voltage terminal motor, low voltage terminal motor, micro-control push-rod electric machine and rotor electric machine, has realized the simulation in dynamic differential pressure and dynamic leakage gap.The present invention preferably resolves and under the operating mode in dynamic differential pressure, dynamic leakage gap, observes and a difficult problem of measuring compressor internal working medium leakage situation.
Accompanying drawing explanation
Fig. 1 is the structural representation of rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture of the present invention.
Fig. 2 is the structural representation of leakage way equivalent simulation device of the present invention.
Embodiment:
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture of the present invention, is comprised of high voltage terminal motor 1, high-pressure piston cylinder 2, suction tude 14, suction valve 3, air inlet pressure sensor 4, phototropic vision 5, leakage way equivalent simulation device 6, back pressure transducer 7, outlet valve 8, outlet pipe 15, low pressure piston cylinder 9, low voltage terminal motor 10, real-time controller 11.On described leakage way equivalent simulation device 6, be provided with suction port 12 and relief opening 13, the piston rod welding of described high voltage terminal motor 1 output shaft and high-pressure piston cylinder 2, the other end of high-pressure piston cylinder 2 is communicated with the suction port 12 of leakage way equivalent simulation device 6 by suction tude 14, and suction valve 3 and air inlet pressure sensor 4 are housed in described suction tude 14 successively; The piston rod welding of described low voltage terminal motor 10 output shafts and low pressure piston cylinder 9, the other end of low pressure piston cylinder 9 is communicated with the relief opening 13 of leakage way equivalent simulation device 6 by outlet pipe 15, and outlet valve 8 and back pressure transducer 7 are housed on described outlet pipe 15 successively.Described high voltage terminal motor 1, low voltage terminal motor 10, air inlet pressure sensor 4, back pressure transducer 7 are electrically connected to real-time controller 11 respectively.
As shown in Figure 2, leakage way equivalent simulation device 6 is comprised of stator 6-1, rotor 6-2, eyeglass 6-3, rotor electric machine 6-4, elastic coupling flexible coupling 6-5, bearing 6-6, push rod 6-7, housing 6-8, micro-control push-rod electric machine 6-9.Described eyeglass 6-3 is resiliently sealed between housing 6-8 and stator 6-1, and phototropic vision 5 is located at eyeglass 6-3 outside; The cavity on the rotor 6-2 left side is hyperbaric chamber 6-10, and the cavity on rotor 6-2 the right is low-pressure cavity 6-11, and the gap forming between rotor 6-2 and stator 6-1 is compressor simulated leakage passage; By from left to right, rotor electric machine 6-4, elastic coupling flexible coupling 6-5, rotor 6-2, bearing 6-6, push rod 6-7, housing 6-8, micro-control push-rod electric machine 6-9 connect successively; Described rotor electric machine 6-4, micro-control push-rod electric machine 6-9 are electrically connected to real-time controller 11 respectively.
Experiment starts, by micro-control push-rod electric machine 6-9, complete the adjusting of simulated leakage path clearance, then toward hyperbaric chamber 6-10, low-pressure cavity 6-11 injects respectively pressurized gas and low-pressure gas, close suction valve 3 and outlet valve 8, by regulating high voltage terminal motor 1 and low voltage terminal motor 10, complete the adjusting of dynamic differential pressure, start rotor electric machine 6-4, complete the adjusting of dynamic clearance, finally by real-time controller 11, according to the pressure of back pressure transducer 7, change, carrying out the conversion of quantity of gas leakage measures, meanwhile, by phototropic vision 5, seeing through eyeglass 6-3 takes the air-fuel mixture cloud atlas of dynamic clearance, thereby complete the observation of rotary compressor internal working medium dynamic leakage.
Claims (2)
1. rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture, comprise high voltage terminal motor, high-pressure piston cylinder, phototropic vision, leakage way equivalent simulation device, low pressure piston cylinder, low voltage terminal motor and real-time controller, it is characterized in that, described high voltage terminal motor, low voltage terminal motor is electrically connected to real-time controller respectively, and its output shaft respectively with high-pressure piston cylinder, the piston rod welding of low pressure piston cylinder, the other end of high-pressure piston cylinder is communicated with the suction port of leakage way equivalent simulation device, the other end of low pressure piston cylinder is communicated with the relief opening of leakage way equivalent simulation device, described phototropic vision is located at the eyeglass outside of leakage way equivalent simulation device.
2. according to claim 1 rotary compressor internal working medium dynamic leakage equivalent observation Laboratory Furniture, it is characterized in that, described leakage way equivalent simulation device is comprised of stator, rotor, eyeglass, rotor electric machine, elastic coupling flexible coupling, bearing, push rod, housing, micro-control push-rod electric machine, described eyeglass closed set is between housing and stator, eyeglass outside is provided with phototropic vision, the cavity on the rotor left side is hyperbaric chamber, the cavity on rotor the right is low-pressure cavity, and the gap forming between rotor and stator is compressor simulated leakage passage; By from left to right, rotor electric machine, elastic coupling flexible coupling, rotor, bearing, push rod, housing, micro-control push-rod electric machine connect successively; Described rotor electric machine, micro-control push-rod electric machine are electrically connected to real-time controller respectively, control by real-time controller to high voltage terminal motor, low voltage terminal motor, micro-control push-rod electric machine and rotor electric machine, the simulation of dynamic clearance while utilizing adjustable relative rotation speed and gap to realize the work of rotary compressor internal working medium, thereby by regulating the volume of hyperbaric chamber, low-pressure cavity to come pilot pressure to change the simulation that realizes dynamic differential pressure, realize the equivalence that rotary compressor internal working medium is leaked and observe and measure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805010A (en) * | 2016-04-29 | 2016-07-27 | 广西大学 | Rotary compressor leakage character testing system based on phase trigger stroboscopic method |
| CN105865719A (en) * | 2016-03-31 | 2016-08-17 | 广西大学 | Rotary compressor internal gas leakage test platform and test method thereof |
| CN106768663A (en) * | 2017-01-09 | 2017-05-31 | 广西大学 | A kind of dynamic observation device of compressor radial clearance leakage |
| CN106949055A (en) * | 2017-04-19 | 2017-07-14 | 广西大学 | A kind of synchronous equivalent observation device of the roll strip of vibration of compressor clearance leakage |
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| US20040048131A1 (en) * | 2002-09-05 | 2004-03-11 | Donaldson Company, Inc. | Seal-leak detector arrangement for compressors and other equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865719A (en) * | 2016-03-31 | 2016-08-17 | 广西大学 | Rotary compressor internal gas leakage test platform and test method thereof |
| CN105805010A (en) * | 2016-04-29 | 2016-07-27 | 广西大学 | Rotary compressor leakage character testing system based on phase trigger stroboscopic method |
| CN106768663A (en) * | 2017-01-09 | 2017-05-31 | 广西大学 | A kind of dynamic observation device of compressor radial clearance leakage |
| CN106768663B (en) * | 2017-01-09 | 2023-07-28 | 广西大学 | Dynamic observation device for radial clearance leakage of compressor |
| CN106949055A (en) * | 2017-04-19 | 2017-07-14 | 广西大学 | A kind of synchronous equivalent observation device of the roll strip of vibration of compressor clearance leakage |
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