CN105598095A - Gas-liquid coupling type vibration excitation testing device - Google Patents
Gas-liquid coupling type vibration excitation testing device Download PDFInfo
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- CN105598095A CN105598095A CN201610167988.XA CN201610167988A CN105598095A CN 105598095 A CN105598095 A CN 105598095A CN 201610167988 A CN201610167988 A CN 201610167988A CN 105598095 A CN105598095 A CN 105598095A
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- liquid
- gas
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- branch road
- pulse
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a gas-liquid coupling type vibration excitation testing device. The gas-liquid coupling type vibration excitation testing device comprises a hydraulic pump station, a pneumatic generation device and a frequency converting control system, wherein the pneumatic generation device comprises an air compressor, a gas storage tank and a pulse valve; an exhausting end of the air compressor is connected with a gas inlet end of the gas storage tank; a gas pressure pipeline at the exhausting end of the gas storage tank is provided with the pulse valve; the pulse valve is controlled by a frequency converter; gas in the gas pressure pipeline passes through the pulse valve to generate pulse gas flow; the hydraulic pump station comprises a variable pump; a liquid inlet end of the variable pump is communicated with a liquid tank through a liquid inlet branched path; one side of a hydraulic pipeline is communicated with the gas pressure pipeline; after the pulse gas flow is mixed with liquid passing through the hydraulic pipeline, formed pulsed gas-liquid two-phase flow is output into a hydraulic system to be washed; and the hydraulic system to be washed is communicated to the liquid tank through a liquid returning branched path. According to the gas-liquid coupling type vibration excitation testing device, scales in the pipelines of the hydraulic system are removed by adopting a manner of combining the liquid and the additional gas, so that online washing of the hydraulic system can be realized without detachment.
Description
Technical field
The present invention relates to Fluid Transmission and Control, Vibration Using Engineering and technical field of automatic control, relate in particular to a kind of for removing the gas-liquid coupling exciter test device of the inner dirt of hydraulic system pipeline.
Background technology
Hydraulic drive has compact conformation, power density is large and control the advantages such as convenient, in social industry-by-industry, is widely used, and it has become the important indicator of weighing a national industrial level height. The cleannes of hydraulic system are the key factors that affects system reliably working, and statistics show, the fault of hydraulic system has 70% ~ 80%, cause because internal system is subject to polluting. Especially the severe and baroque hydraulic system for operating mode, because the assemblies such as the integrated package, joint, pipeline, hydraulic valve of composition system are more, pollutant, after above module inner forms and deposits, makes cleaning process become very difficult.
The hydraulic system cleaning method of technology comparative maturity has physical cleaning and Chemical cleaning. Simple physical cleaning is for changing hydraulic oil, or by after hydraulic system dismounting, employing hairbrush and wash oil are carried out by part decontamination valve block assembly, and this method cleaning efficiency is low, and system easily causes secondary pollution. Domestic to the physical cleaning of more complicated hydraulic system special flushing pump and the flushing oil of employing mostly, first by all intermediate duct short circuits, only to flushing of pipeline. Then use work pumping plant and working oil, by all pipelines and integrated package connecting system (proportioning valve, servo valve etc. adopt rinse plate substitute), to form loop, fluid circulates system is rinsed under high-voltage high-speed. Chemical cleaning aspect mainly contains that solvent heating is embathed and acidic treatment, it is that the hydraulic part to be cleaned disassembling is immersed to (heating-up temperature is generally 35 ~ 85 DEG C) in the rinse bath with firing equipment that solvent heating is embathed, and in cleaning fluid, pass into compressed air or steam, can in cleaning fluid, add if desired additive, to improve antirust decontamination and cleansing power. Because the emission of Chemical cleaning can, to environment, therefore, be explored effective physical cleaning mode and meet national energy-saving reduction of discharging relevant policies.
Summary of the invention
The object of the invention is the deficiency in order to solve the problems of the technologies described above existence, a kind of gas-liquid coupling exciter test device is provided, this device adopts the gas-liquid that liquid and adscititious gases the are combined exciting scrubbing mode that is coupled, the liquid of sending by hydraulic power unit mixes with the pulse pneumatic that gas generating unit produces, make the fluid of pipe interior form the biphase gas and liquid flow of pulsation, under the effect of pulsation biphase gas and liquid flow, the dirt of hydraulic system pipeline inside is removed, realized the not disassembly, cleaning online of hydraulic system.
The present invention specifically by the following technical solutions and technical measures realize.
The invention provides a kind of gas-liquid coupling exciter test device, comprise hydraulic power unit, pneumatic generating means and frequency-changing control system, frequency-changing control system comprises distribution box, frequency converter and motor;
Described pneumatic generating means comprises air compressor, air accumulator, pulse valve and pneumatic circuit, the exhaust end of air compressor connects the inlet end of air accumulator, the pneumatic circuit of air accumulator exhaust end is provided with pulse valve, pulse valve is by Frequency Converter Control, and the gas in pneumatic circuit produces pulse pneumatic after pulse valve;
Described hydraulic power unit comprises variable pump and fluid pressure line, variable pump is driven by motor, motor one end connects frequency converter, the liquid feeding end of variable pump is communicated with liquid case by feed liquor branch road, fluid pressure line one side of the outlet end of variable pump is communicated with pneumatic circuit, after the pulse pneumatic of being exported by pneumatic generating means mixes with the liquid passing through in fluid pressure line, the biphase gas and liquid flow that forms pulsation under the exciting effect of pulse valve exports in hydraulic system to be cleaned, the instantaneous pressure producing when bubble-break in biphase gas and liquid flow makes the pollutant that is attached to the inner surface of hydraulic system to be cleaned be damaged and peel off, hydraulic system to be cleaned is communicated with liquid branch road once, this time liquid branch road is communicated to soiling solution retracting device.
As improving further, described soiling solution retracting device is liquid case, on time liquid branch road, is provided with back liquid filter.
As improving further, on time liquid branch road, counterbalance valve is installed.
As improving further, described feed liquor branch road is provided with feed liquor filter.
As improving further, on the fluid pressure line of the outlet end of described variable pump, be also provided with a branch road, this branch road is communicated with liquid case, and branch road is provided with overflow valve.
As improving further, on the fluid pressure line of the outlet end of described variable pump, be also provided with check valve and choke valve.
As improving further, the pneumatic circuit of described air accumulator exhaust end is provided with pressure-reducing valve and air gauge.
As improving further, the pneumatic circuit of described pulse valve rear end is provided with one-way throttle valve.
As improving further, on the branch road of gas-liquid intersection rear end, be provided with the pressure transmitter for measuring the pressure after gas-liquid mixed, flowmeter is also installed on this branch road.
As further improving, the keying frequency of described pulse valve is controlled by PLC.
The invention has the beneficial effects as follows:
(1) the present invention is directed to the physical cleaning of hydraulic system routine and the drawback of Chemical cleaning, a kind of gas-liquid coupling exciting scrubbing mode that liquid and adscititious gases are combined is provided, its objective is that the liquid of sending by hydraulic power unit mixes with the pulse pneumatic that gas generating unit produces, make the fluid of pipe interior form the biphase gas and liquid flow of pulsation, under the effect of pulsation biphase gas and liquid flow, the dirt of hydraulic system pipeline inside is removed, realized the not disassembly, cleaning online of hydraulic system. Its target is to provide new method, new technology for the cleaning of hydraulic system. These apparatus and method meet national energy-saving and reduce discharging relevant policies, have more important learning value and application prospect widely;
(2) the exciting fluid in the present invention is the two phase flow of gas-liquid mixed, under the effect of pulse valve, its flow regime is pulsed, and the pulse valve of ripple frequency under can controlling by PLC regulates, than the hydraulic system normal special flushing pump adopting and flushing oil cleaning at present, its under panting action to the effect of peeling off of pipe interior pollutant than strong many of simple flushing pump, scrubbing effect is remarkable;
(3) in the present invention the two phase flow of gas-liquid mixed in motion process, owing to receiving the exciting of pulse valve, bubble in fluid can issue growth greatly and crumble and fall in the effect of positive/negative-pressure, in the time crumbling and fall, can produce instantaneous pressure, can force to peel off to being attached to the pollutant of inner-walls of duct, therefore there is stronger dirty removal capacities;
(4) gas-liquid parameter of the present invention can regulate separately, and fluid pressure is combined adjusting by overflow valve and counterbalance valve, and flow is by variable pump, frequency converter and choke valve comprehensive adjustment; Gas pressure is regulated by the pressure-reducing valve being connected with air compressor, and flow is by one-way throttle valve regulation. Therefore, the parameter matching between gas-liquid two-phase is flexible, can facilitate adjustment to relevant parameter according to system concrete condition, adopts more merely flushing pump to clean and has absolute advantage;
(5) the invention belongs to physical cleaning mode, than the Chemical cleaning of pipeline, can environment not produced and be polluted, meet national energy-saving and reduce discharging policy;
(6) the present invention has adopted brand-new exciting mechanism, is a kind of new technology and new method to the cleaning of hydraulic system. Especially the severe and baroque hydraulic system for operating mode, because the assemblies such as the integrated package, joint, pipeline, hydraulic valve of composition system are more, adopts gas-liquid coupling exciting to carry out pollutant removal, and cleaning efficiency is higher. This gas-liquid coupling exciter test device, can replace the existing method of system being dismantled to laggard row manual cleaning or adopting merely flushing pump to clean. Can for different hydraulic systems, conveniently realize the step-less adjustment of gas-liquid two-phase excitation parameter, energy-conserving and environment-protective, remarkable in economical benefits.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Mark in figure: 1, motor, 2, frequency converter, 3, feed liquor filter, 4, liquid case, 5, variable pump, 6, overflow valve, 7, check valve, 8, choke valve, 9, pressure transmitter, 10, hydraulic system to be cleaned, 11, pulse valve, 12, flowmeter, 13, counterbalance valve, 14, air accumulator, 15, go back to liquid filter, 16, air compressor, 17, pressure-reducing valve, 18, air gauge, 19, one-way throttle valve.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the invention will be further described:
As shown in Figure 1, the present embodiment discloses a kind of gas-liquid coupling exciter test device, comprises hydraulic power unit, pneumatic generating means and frequency-changing control system, and frequency-changing control system comprises distribution box, frequency converter 2 and motor 1;
Described pneumatic generating means comprises air compressor 16, air accumulator 14, pulse valve 11 and pneumatic circuit, the source of the gas of pneumatic generating means is produced by air compressor, the exhaust end of air compressor 16 connects the inlet end of air accumulator 14, on the pneumatic circuit of air accumulator 14 exhaust ends, be provided with successively pressure-reducing valve 17, air gauge 18 and pulse valve 11, pulse valve 11 is controlled by frequency converter 2, and the keying frequency of pulse valve 11 is controlled by PLC. The gas producing enters pulse valve after air accumulator, pressure-reducing valve and Pressure gauge, and the gas in pneumatic circuit produces pulse pneumatic after pulse valve 11; The pneumatic circuit of described pulse valve 11 rear ends is provided with one-way throttle valve 19.
Described hydraulic power unit comprises variable pump 5 and fluid pressure line, variable pump 5 is driven by motor 1, motor 1 one end connects frequency converter 2, the liquid feeding end of variable pump 5 is communicated with liquid case 4 by feed liquor branch road, feed liquor branch road is provided with feed liquor filter 3, on the fluid pressure line of the outlet end of described variable pump 5, be also provided with a branch road, this branch road is communicated with liquid case 4, and branch road is provided with overflow valve 6. On the fluid pressure line of the outlet end of described variable pump 5, be also provided with check valve 7 and choke valve 8.
Liquid enters choke valve 8 through check valve 7, because pulse valve and air compressor start, gas in branch road is through air accumulator 14, pressure-reducing valve 17 and pulse valve 11 enter one-way throttle valve 19, after mixing with liquid, the air-flow of pulsation enters hydraulic system 10 to be cleaned, pressure transmitter 9 and flowmeter 12 are measured for the pressure to after gas-liquid mixed and flow, analysis data. In this process, fluid pressure is regulated by overflow valve 6, and flow is regulated by choke valve 8, and gas pressure is regulated by pressure-reducing valve 17, and flow is regulated by one-way throttle valve 19.
Fluid pressure line one side of the outlet end of variable pump 5 is communicated with pneumatic circuit, after the pulse pneumatic of being exported by pneumatic generating means mixes with the liquid passing through in fluid pressure line, under the exciting effect of pulse valve 11, form the biphase gas and liquid flow of pulsation, mixed biphase gas and liquid flow enters hydraulic system 10 to be cleaned, bubble in fluid can issue growth greatly and crumble and fall in the effect of positive/negative-pressure, the instantaneous pressure producing while crumbling and fall is sharply destroyed the pollutant that is attached to hydraulic system to be cleaned 10 pipe interior surfaces, thereby peels off, disperses to reach scrubbing object. In order to test conveniently, acrylic pipe transparent hydraulic system 10 use to be cleaned is substituted, be convenient to observation and inspection in process of the test.
Be connected with back liquid branch road in the rear end of hydraulic system 10 to be cleaned, the gas-liquid-solid mixture in time liquid branch road, after returning liquid filter 15 filtrations, enters liquid feeding tank 4. On time liquid branch road, counterbalance valve 13 is installed, counterbalance valve coordinates with overflow valve 6 adjusting of carrying out system pressure load.
On the branch road of gas-liquid intersection rear end, be provided with pressure transmitter 9, for measuring the pressure after gas-liquid mixed, flowmeter 12 be also installed on this branch road.
The operation principle of this gas-liquid coupling exciter test device is: primer fluid press pump, liquid enters hydraulic pump through feed liquor filter, the liquid that pressure and flow are adjustable enters transparent acrylic pipe through check valve and choke valve, connects pressure transmitter and counterbalance valve after acrylic pipe; Pneumatic generating means is connected on fluid pressure line, starts air compressor, and air enters pulse valve through air accumulator, pressure-reducing valve and Pressure gauge; Pulse valve is by Frequency Converter Control, and mineralization pressure, the pulse pneumatic that frequency is adjustable mix with the liquid in major loop through connected one-way throttle valve again, forms the biphase gas and liquid flow of pulsation; Under the effect of high-frequency impulse valve, the instantaneous pressure producing when bubble-break in biphase gas and liquid flow is sharply destroyed the pollutant that is attached to pipe interior surface, thereby peels off, disperses to reach scrubbing object; After hydraulic system to be cleaned, be provided with back liquid filter, the mixture of liquids and gases passes through back, after liquid filter filtration, to enter again liquid feeding tank.
The course of work of this gas-liquid coupling exciter test device is: when startup, first start hydraulic power unit, overflow valve is opened to minimum pressure, hydraulic pump motor starts, slowly regulation relief valve, according to load behavior in conjunction with counterbalance valve regulating system pressure; Then unbalanced pulse valve, starts air compressor. While stopping, first close air compressor and pulse valve, then regulation relief valve and counterbalance valve reduce system pressure to minimum, next close hydraulic pump motor, and system is out of service.
Claims (10)
1. a gas-liquid coupling exciter test device, is characterized in that: comprise hydraulic power unit, pneumatic generating means and frequency-changing control system, frequency-changing control system comprises distribution box, frequency converter (2) and motor (1);
Described pneumatic generating means comprises air compressor (16), air accumulator (14), pulse valve (11) and pneumatic circuit, the exhaust end of air compressor (16) connects the inlet end of air accumulator (14), the pneumatic circuit of air accumulator (14) exhaust end is provided with pulse valve (11), pulse valve (11) is controlled by frequency converter (2), and the gas in pneumatic circuit produces pulse pneumatic after pulse valve (11);
Described hydraulic power unit comprises variable pump (5) and fluid pressure line, variable pump (5) is driven by motor (1), motor (1) one end connects frequency converter (2), the liquid feeding end of variable pump (5) is communicated with liquid case (4) by feed liquor branch road, fluid pressure line one side of the outlet end of variable pump (5) is communicated with pneumatic circuit, after the pulse pneumatic of being exported by pneumatic generating means mixes with the liquid passing through in fluid pressure line, the biphase gas and liquid flow that forms pulsation under the exciting effect of pulse valve (11) exports in hydraulic system to be cleaned (10), the instantaneous pressure producing when bubble-break in biphase gas and liquid flow makes the pollutant that is attached to the inner surface of hydraulic system to be cleaned (10) be damaged and peel off, hydraulic system to be cleaned (10) is communicated with liquid branch road once, this time liquid branch road is communicated to soiling solution retracting device.
2. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: described soiling solution retracting device is liquid case (4), on time liquid branch road, is provided with back liquid filter (15).
3. a kind of gas-liquid coupling exciter test device according to claim 2, is characterized in that: on time liquid branch road, counterbalance valve (13) is installed.
4. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: described feed liquor branch road is provided with feed liquor filter (3).
5. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: on the fluid pressure line of the outlet end of described variable pump (5), be also provided with a branch road, this branch road is communicated with liquid case (4), and branch road is provided with overflow valve (6).
6. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: on the fluid pressure line of the outlet end of described variable pump (5), be also provided with check valve (7) and choke valve (8).
7. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: the pneumatic circuit of described air accumulator (14) exhaust end is provided with pressure-reducing valve (17) and air gauge (18).
8. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: the pneumatic circuit of described pulse valve (11) rear end is provided with one-way throttle valve (19).
9. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: on the branch road of gas-liquid intersection rear end, be provided with the pressure transmitter (9) for measuring the pressure after gas-liquid mixed, flowmeter (12) is also installed on this branch road.
10. a kind of gas-liquid coupling exciter test device according to claim 1, is characterized in that: the keying frequency of described pulse valve (11) is controlled by PLC.
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CN201610167988.XA CN105598095A (en) | 2016-03-23 | 2016-03-23 | Gas-liquid coupling type vibration excitation testing device |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106971660A (en) * | 2016-10-27 | 2017-07-21 | 北京石油化工学院 | A kind of multifunctional modular experimental provision based on static mixer |
CN107655634A (en) * | 2016-07-26 | 2018-02-02 | 中国辐射防护研究院 | A kind of pulsed halogen gas generator |
CN113856240A (en) * | 2021-08-27 | 2021-12-31 | 中国核电工程有限公司 | Pulse generation system for pulse extraction column and pulse extraction system |
CN114909362A (en) * | 2022-02-07 | 2022-08-16 | 上海大学 | Multi-parameter measurement test device and method for hydraulic pipeline of aircraft engine |
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CN205423405U (en) * | 2016-03-23 | 2016-08-03 | 洛阳理工学院 | Hydraulic system scrubbing device |
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CN102966641A (en) * | 2011-09-02 | 2013-03-13 | 上海宝冶集团有限公司 | High/low-pressure composite online circulating flushing and pressure testing device for hydraulic system |
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CN107655634A (en) * | 2016-07-26 | 2018-02-02 | 中国辐射防护研究院 | A kind of pulsed halogen gas generator |
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CN114909362A (en) * | 2022-02-07 | 2022-08-16 | 上海大学 | Multi-parameter measurement test device and method for hydraulic pipeline of aircraft engine |
CN114909362B (en) * | 2022-02-07 | 2023-07-14 | 上海大学 | Multi-parameter measurement test device and method for hydraulic pipeline of aero-engine |
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