CN104990816A - Pulse test device - Google Patents
Pulse test device Download PDFInfo
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- CN104990816A CN104990816A CN201510412682.1A CN201510412682A CN104990816A CN 104990816 A CN104990816 A CN 104990816A CN 201510412682 A CN201510412682 A CN 201510412682A CN 104990816 A CN104990816 A CN 104990816A
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- pulse
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Abstract
The invention relates to a pulse test device, which comprises a pressure medium supply mechanism, a pulse generating mechanism and a test connecting component, wherein the pulse generating mechanism is connected with the pressure medium supply mechanism and is used for enabling pressure media to generate pulse; the test connecting component is connected with the pulse generating mechanism and is used for installing a component to be tested. The component to be tested is connected with the test component connecting part; under the effect of the pulse generating mechanism, the pressure media circularly impact the component to be tested in the pulse mode, so that the received impact force of system components in the practical work process can be simulated; the effect of finding the problems of key devices in the structure design and production processes in advance is achieved; the better monitoring effect is achieved on the quality of the system components; further, the occurrence of failures after sales is effectively reduced; meanwhile, the pulse test device can also provide guidance for the improvement of the design and production process.
Description
Technical field
The present invention relates to air-conditioning production technical field, particularly one is in air-conditioning production run, various parts is carried out to the pulse test device of grade estimation.
Background technology
In order to ensure air-conditioning, there is reliable outgoing, need to test various parts in air-conditioning production run, to avoid going wrong in follow-up use procedure.
In the various feedback of quality problems after sale, the fault of system leak accounts for very large proportion, in order to effectively prevent system leak, generally adopt in industry and carry out static pressure test to sorts of systems part (as fluorine system and water system), typical test block comprises the little copper product of air conditioner, four-way valve, square body valve etc.So-called static pressure test applies specific pressure to tested parts exactly, and after making pressure durations a period of time, observes tested parts and occur with or without damage or with or without leakage.
But this kind of experimental technique also exists obvious problem, in fact, in the process of the actual use of air-conditioning, what sorts of systems part bore is not static pressure, and what in most cases bear is pulse, pulse can cause the impact of circulation to sorts of systems part, though slag inclusion, surface scratch, rosin joint and stress collection moderate defect in system part are not easy to be found in static pressure test very much, but under the circulation impact of actual pulse pressure, be but easy to produce leakage failure.
Therefore, how can simulate actual after sale service condition, carry out pulse testing to sorts of systems part, to find this type of Primary Component Problems existing in advance, what reduce fault is the technical matters that current those skilled in the art need solution badly.
Summary of the invention
The object of this invention is to provide a kind of pulse test device, so that actual after sale service condition can be simulated, pulse testing is carried out to sorts of systems part, thus accomplish to find this type of Primary Component Problems existing in advance, reduce the generation of fault.
For solving the problems of the technologies described above, pulse test device provided by the invention, comprising:
Pressure medium organization of supply;
Be connected with described pressure medium organization of supply, and the pulse generate mechanism for making pressure medium produce pulse;
Be connected with described pulse generate mechanism, and the test connecting portion for installing for UUT.
Preferably, the pressure medium in described pulse test device is hydraulic oil, and described pressure organization of supply comprises:
By the pump housing that pipeline is connected with fuel tank;
Be connected with the described pump housing, and the motor for driving the described pump housing to rotate.
Preferably, the pressure medium in described pulse test device is gas, and described pressure organization of supply is high-pressure air source.
Preferably, described pulse generation device is solenoid valve, and described solenoid valve comprises the first working position and second working position of cyclic switching, and wherein, when the first working position, described pressure medium organization of supply is communicated with described test connecting portion; When the second working position, described pressure medium organization of supply and described test connecting portion disconnect.
Preferably, the first pressure-regulating valve be arranged between described pressure medium organization of supply and described pulse generate mechanism is also comprised.
Preferably, the second pressure-regulating valve communicated with described connecting portion is also comprised.
Preferably, described solenoid valve is controlled by PLC, and the time interval that described solenoid valve switches in the first working position and the second working position is adjustable.
Preferably, also comprise and being arranged between described test connecting portion and described solenoid valve, and only allow described pressure medium to flow to the retaining valve of described test connecting portion by described solenoid valve.
Preferably, also comprise hydraulic oil cooling body, described hydraulic oil cooling body comprises:
The circulation pipe that two ends are communicated with described fuel tank respectively;
Be serially connected in the ebullator on described circulation pipe;
To fit the cooling device arranged with described circulation pipe.
Preferably, also comprise the temperature sensor be arranged in described fuel tank, described temperature sensor, ebullator and described cooling device are all connected with PLC, and when the oil temperature of described hydraulic oil is more than or equal to preset temperature, described PLC controls described ebullator and described cooling device starts; When the oil temperature of described hydraulic oil is less than described preset temperature, described PLC controls described ebullator and described cooling device stops.
Preferably, also comprise warning device, and be arranged on the liquid level sensor in described fuel tank, described liquid level sensor is all connected with described PLC with described warning device, and when described oil tank liquid level is lower than safety levels, described PLC controls described warning device and reports to the police.
As can be seen from above technical scheme, in pulse test device disclosed in this invention, comprise pressure medium organization of supply, be connected with pressure medium organization of supply, and for the pulse generate mechanism making pressure medium produce pulse, mechanism is connected with pulse generate, and the test connecting portion for installing for UUT.
UUT will be connected test connecting portion, under the effect of pulse generate mechanism, pressure medium will carry out circulation impact to UUT in the form of a pulse, this can simulate system unit impulsive force suffered in practical work process, thus accomplish to find in advance the problem that Primary Component is existing in structural design and production run, good supervisory function bit is played to the quality of system unit, and then effectively reduces the generation of fault after sale; This pulse test device can also provide guidance to the improvement of design and production technology simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of pulse test device disclosed in the embodiment of the present invention;
The simplification structural representation of the pulse test device that Fig. 2 provides for the embodiment of the present invention;
The structural representation of pulse test device of Fig. 3 for providing in the embodiment of the present invention.
Wherein, 1 is fuel tank, and 2 is motor, and 3 is the pump housing, and 4 is the second pressure-regulating valve, 5 is retaining valve, and 6 is pulse generate mechanism, and 7 is the first pressure-regulating valve, and 8 is UUT, and 9 is circulation pipe, 10 is cooling device, and 11 is ebullator, and 12 is UUT holding chamber, and 13 is control panel.
Embodiment
Core of the present invention is to provide a kind of pulse test device, can simulate actual after sale service condition, carries out pulse testing to sorts of systems part, thus accomplishes to find this type of Primary Component Problems existing in advance, reduces the generation of fault.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the schematic diagram of pulse test device disclosed in the embodiment of the present invention, the simplification structural representation of the pulse test device that Fig. 2 provides for the embodiment of the present invention.
Pulse test device disclosed in the present invention forms primarily of three parts, be respectively pressure medium organization of supply, pulse generate mechanism 6 and test connecting portion, wherein pressure medium organization of supply is used for the satisfactory high-pressure medium of whole pulse test device provisioning, pulse generate mechanism 6 has the medium stream of pulse characteristic for being changed into by high-pressure medium, to carry out pulse test to UUT 8, simulate the impact that in user's use procedure after sale, system unit bears, test connecting portion is connected with pulse generate mechanism 6, medium stream through pulse generate mechanism 6 will directly enter into test connecting portion, test connecting portion can be installed for UUT 8.
In the process of reality test, UUT 8 will be installed in test connecting portion, under the effect of pulse generate mechanism, pressure medium will carry out circulation impact to UUT 8 in the form of a pulse, this can simulate system unit impulsive force suffered in practical work process, thus accomplish to find in advance the problem that Primary Component is existing in structural design and production run, good supervisory function bit is played to the quality of system unit, and then effectively reduces the generation of fault after sale; This pulse test device can also provide guidance to the improvement of design and production technology simultaneously.
In embodiments of the present invention, the pressure medium in pulse test device can be hydraulic oil or gas, is first specifically introduced the pulse test device adopting hydraulic oil as pressure medium.
When adopting hydraulic oil as pressure medium, pressure medium organization of supply in the present embodiment specifically comprises the pump housing 3 and motor 2, its middle pump body 3 is connected with fuel tank 1 by pipeline, motor 2 drives the pump housing 3 to rotate, when motor 2 drives the pump housing 3 to rotate, impeller runs up in the pump housing 3 (before opening oil pump will just the pump housing be full of oil), liquid in the pump housing 3 rotates together along with impeller, liquid is thrown away by impeller in exit under the influence of centrifugal force, the liquid thrown away speed in the pump housing 3 diffuser casing is slack-off gradually, after liquid is thrown out of, impeller central place forms vacuum low-pressure district, liquid in fuel tank 1 in the external world under the influence of air pressure, flow in the pump housing 3 through pipeline, the volume of the pump housing 3 diffuser casing is certain, along with the liquid be thrown out of increases, pressure also increases gradually, finally be discharged from the outlet of the pump housing 3, hydraulic oil is continuously sucked up like this and is then continuously discharged from the outlet of the pump housing 3 from fuel tank 1.
Pulse generation device 6 also has multiple way of realization certainly, in the present embodiment, pulse generation device 6 adopts solenoid valve, and this solenoid valve comprises the first working position and second working position of cyclic switching, when the first working position, pressure medium organization of supply is communicated with test connecting portion, now high-pressure medium can enter into test connecting portion by pulse generate mechanism 6, when the second working position, pressure medium organization of supply disconnects with test connecting portion, and namely high-pressure medium can not enter test connecting portion.When solenoid valve is in the first working position and the second working position cyclic switching, namely high-pressure medium defines stream of pulses.
As shown in Figures 1 and 2, in order to reduce costs, in the embodiment of the present invention, common three-position four-way valve is transformed, see Fig. 1, the A mouth of three-position four-way valve is unimpeded, the shutoff of B hole, and three-position four-way valve is followed successively by the first working position from left to right, second working position and off-position, wherein off-position does not connect electricity, two working positions of this three-position four-way valve are only utilized in the present embodiment, when in the first position, pressure medium organization of supply is communicated with test connecting portion, when being in the second working position, pressure medium organization of supply disconnects with test connecting portion, hydraulic oil directly flows back to fuel tank.
The pump housing 3 be connected with motor 2 preferably adopts ram pump, in order to protect ram pump not damaged by high-pressure medium, also between pressure medium organization of supply and pulse generate mechanism 6, is provided with the first pressure-regulating valve 7, as shown in fig. 1 in the present embodiment.Further, in order to regulate the pressure of high-pressure medium impacting UUT 8, also can arrange and the second pressure-regulating valve 4 tested connecting portion and be communicated with.
In addition, the way of realization of another pulse generate mechanism 6 is additionally provided in the application, this kind of pulse generate mechanism 6 adopts single-action hydraulic cylinder, the piston of single-action hydraulic cylinder is as a valve body, under the effect of oil pressure, the pipeline between the piston shutoff pressure medium organization of supply of single-action hydraulic cylinder and test connecting portion; And under the effect of spring reset, the pipeline between the piston opening pressure power media organization of supply of one-way cylinder and test connecting portion, thus make high-pressure medium form stream of pulses.
Pulse test device disclosed in the present invention also achieves robotization, as shown in Figure 3, as the solenoid valve of pulse generate mechanism 6 by PLC (Programmable Logic Controller programmable logic controller (PLC)), pulse test device is provided with control panel 13, can carry out by control panel 13 time interval that solenoid valve switches in the first working position and the second working position, namely the recurrence interval is adjustable.Be understandable that, first pressure-regulating valve 7 and the second pressure-regulating valve 4 also can be controlled by PLC, control panel 13 also can set the pressure of the first pressure-regulating valve 7 and the second pressure-regulating valve 4, and this pulse test device is also provided with UUT holding chamber 12 in addition.
In order to prevent the backflow of hydraulic oil, between test connecting portion and solenoid valve, be also provided with retaining valve 5, as shown in fig. 1, this retaining valve 5 only authorized pressure medium flows to test connecting portion by solenoid valve.
Understandablely be, hydraulic oil in the process of circulation due to pressurized repeatedly, its temperature very easily easily raises, and temperature raise after hydraulic oil not only density can change, but also the hermetically-sealed constructions such as the O-ring seal of pipeline can be damaged, have also been devised hydraulic oil cooling body for this reason in the present embodiment, this mechanism comprises circulation pipe 9, be serially connected in ebullator 11 on circulation pipe 9 and fit the cooling device 10 arranged with circulation pipe 9, as shown in Figure 2, the arrow in Fig. 2 represents the flow direction of hydraulic oil.Because the temperature of hydraulic oil is higher, adopt air-conditioner outdoor unit (condenser) can cool hydraulic oil as cooling device 10.
In order to ensure the reliability of hydraulic oil cooling body work, the temperature sensor be arranged in fuel tank 1 is also comprised in pulse test device in the present embodiment, and temperature sensor, ebullator 11 and cooling device 10 are all connected with PLC, when the temperature of hydraulic oil is more than or equal to preset temperature, PLC controlled circulation pump 11 and cooling device 10 start, when the temperature of hydraulic oil is less than preset temperature, PLC controlled circulation pump 11 and cooling device 10 stop.
Further, also warning device is provided with in the present embodiment, and the liquid level sensor be arranged in fuel tank 1, liquid level sensor is all connected with PLC with warning device, and when oil tank liquid level is lower than safety levels, PLC controls warning device and reports to the police, and this effectively can improve the security of equipment work.
Pressure transducer can be set at test connecting portion during test, and by the pressure reservoir of the UUT 8 measured by pressure transducer, PLC generates pressure time history plot automatically, also carries out automatic alarm by warning device when pressure generation ANOMALOUS VARIATIONS.
In above embodiment, be that hydraulic pressure oil condition is introduced to pressure medium, compared with adopting hydraulic pressure oil condition with pressure medium, when pressure medium is changed to gas, the part of change is needed to be only pressure medium organization of supply, in the present embodiment, pressure medium organization of supply is specially high-pressure air source.
When pressure medium is gas, pulse generate mechanism and test connecting portion can with in above-described embodiment share, herein this is no longer repeated.
Above pulse test device provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a pulse test device, is characterized in that, comprising:
Pressure medium organization of supply;
Be connected with described pressure medium organization of supply, and the pulse generate mechanism (6) for making pressure medium produce pulse;
Be connected with described pulse generate mechanism (6), and the test connecting portion for installing for UUT.
2. pulse test device according to claim 1, is characterized in that, the pressure medium in described pulse test device is hydraulic oil, and described pressure medium organization of supply comprises:
By the pump housing (3) that pipeline is connected with fuel tank (1);
Be connected with the described pump housing (3), and the motor for driving the described pump housing (3) to rotate.
3. pulse test device according to claim 1, is characterized in that, the pressure medium in described pulse test device is gas, and described pressure medium organization of supply is high-pressure air source.
4. the pulse test device according to Claims 2 or 3, it is characterized in that, described pulse generate mechanism (6) is solenoid valve, and described solenoid valve comprises the first working position and second working position of cyclic switching, wherein, when the first working position, described pressure medium organization of supply is communicated with described test connecting portion; When the second working position, described pressure medium organization of supply and described test connecting portion disconnect.
5. pulse test device according to claim 4, is characterized in that, also comprises the first pressure-regulating valve (7) be arranged between described pressure medium organization of supply and described pulse generate mechanism (6).
6. pulse test device according to claim 5, is characterized in that, also comprises the second pressure-regulating valve (4) communicated with described test connecting portion.
7. pulse test device according to claim 4, is characterized in that, described solenoid valve is controlled by PLC, and the time interval that described solenoid valve switches in the first working position and the second working position is adjustable.
8. pulse test device according to claim 4, it is characterized in that, also comprise and being arranged between described test connecting portion and described solenoid valve, and only allow described pressure medium to flow to the retaining valve (5) of described test connecting portion by described solenoid valve.
9. pulse test device according to claim 2, is characterized in that, also comprises hydraulic oil cooling body, and described hydraulic oil cooling body comprises:
The circulation pipe (9) that two ends are communicated with described fuel tank (1) respectively;
Be serially connected in the ebullator (11) on described circulation pipe (9);
To fit the cooling device (10) arranged with described circulation pipe (9).
10. pulse test device according to claim 9, it is characterized in that, also comprise the temperature sensor be arranged in described fuel tank (1), described temperature sensor, ebullator (11) and described cooling device (10) are all connected with PLC, when the oil temperature of described hydraulic oil is more than or equal to preset temperature, described PLC controls described ebullator (11) and described cooling device (10) starts; When the oil temperature of described hydraulic oil is less than described preset temperature, described PLC controls described ebullator (11) and described cooling device (10) stops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412682.1A CN104990816B (en) | 2015-07-14 | 2015-07-14 | A kind of pulse test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412682.1A CN104990816B (en) | 2015-07-14 | 2015-07-14 | A kind of pulse test device |
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| CN104990816A true CN104990816A (en) | 2015-10-21 |
| CN104990816B CN104990816B (en) | 2018-02-23 |
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| CN201510412682.1A Expired - Fee Related CN104990816B (en) | 2015-07-14 | 2015-07-14 | A kind of pulse test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105716822A (en) * | 2016-01-28 | 2016-06-29 | 武汉信测标准技术服务有限公司 | Control method and device for low-pressure pulse duration test of automobile part |
| CN106644547A (en) * | 2017-01-03 | 2017-05-10 | 无锡塔尔基热交换器科技有限公司 | Pulse simulation device |
| CN112595523A (en) * | 2020-11-23 | 2021-04-02 | 一汽解放汽车有限公司 | PVT test system |
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| CN112595523A (en) * | 2020-11-23 | 2021-04-02 | 一汽解放汽车有限公司 | PVT test system |
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Granted publication date: 20180223 |