CN102213635A - Testing system for main valve leakage of hydraulic excavator - Google Patents
Testing system for main valve leakage of hydraulic excavator Download PDFInfo
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- CN102213635A CN102213635A CN 201110116378 CN201110116378A CN102213635A CN 102213635 A CN102213635 A CN 102213635A CN 201110116378 CN201110116378 CN 201110116378 CN 201110116378 A CN201110116378 A CN 201110116378A CN 102213635 A CN102213635 A CN 102213635A
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Abstract
The invention discloses a testing system for the main valve leakage of a hydraulic excavator. The testing system comprises a driving mechanism, a reversing mechanism, a regulating mechanism, a cooling mechanism, a measuring mechanism and an indicating mechanism, wherein the driving mechanism comprises a motor and a hydraulic pump which are mutually connected; the hydraulic pump is communicated with a fuel tank; the reversing mechanism is a two-position three-way reversing valve and comprises a liquid inlet, a working port and a liquid outlet; the liquid inlet is connected with the hydraulic pump; the regulating mechanism comprises a reducing valve and an overflow valve; the liquid outlet of the reversing mechanism is sequentially connected with the measured fuel ports of the reducing valve and an excavator control valve; one end of the cooling mechanism is connected with the liquid outlet of the reversing mechanism after being connected in series with the overflow valve, and the other end of the cooling mechanism is connected with the working port of the reversing mechanism; the measuring mechanism comprises a measuring tool and a measuring pot; and the indicating mechanism comprises a thermometer, a first pressure meter and a second pressure meter. The testing system disclosed by the invention is designed for the leakage testing of the excavator control valve, can be used for mastering the leakage condition of the valve core of the control valve and detecting the quality of the control valve, has the advantages of compact system structure and high testing accuracy and work efficiency and is suitable for popularization and use.
Description
Technical field
The present invention relates to a kind of operation valve pilot system, relate in particular to a kind of control main valve and leak the system that tests the engineering machinery hydraulic excavator.
Background technology
Along with rapid economy development, hydraulic excavator role in various engineering construction fields, particularly capital construction is more and more obvious, and hydraulic excavator is as class construction machinery fast and efficiently, and use amount also is more and more many.Hydraulic excavator generally is made up of several parts such as equipment, slewing equipment, running gear, hydraulic system and power systems, wherein hydraulic system and power system are as the most important core system of hydraulic excavator, and its manufacturing cost proportion in the complete machine manufacturing cost also is maximum.Wherein for hydraulic excavator hydraulic system, the manipulation control performance of hydraulic excavator, comprise that mainly the one action of each functional element and composite move etc. are all realized by operation valve control, operation valve is its core component, directly determined the performance height of excavator, this just requires the transmission efficiency height of operation valve, and thermal value is few, and energy consumption is low.
Operation valve is by housing, many three hydraulicdirectional control valves and other annexes constitute, in the course of the work, reversal valve can often produce hydraulic fluid leak owing to the existence in slit, the efficient of the internal hydraulic pressure of reversal valve oil leakage can reduction excavator hydraulic system, increase thermal value and cause problem such as energy loss, therefore the oil of excavator operation valve is leaked to study and dependency structure improved and become very necessary, this just needs one to overlap test unit and the method that can accurately measure the hydraulic fluid leak amount of operation valve.Chinese patent CN201637554U discloses a kind of reduction valve leak-testing system, comprise cyclic water tank, water pump and test cell, but this system is the test of carrying out at reduction valve, does not see system's report that the leakage of hydraulic excavator operation valve is tested.
Summary of the invention
At the problem of above-mentioned existence, the purpose of this invention is to provide the test macro that a kind of hydraulic excavator main valve leaks, be primarily aimed at the design of hydraulic excavator operation valve, can in time understand the situation that the operation valve spool leaks, the quality of check operation valve, compact conformation, easy to operate, high efficiency.
The objective of the invention is to be achieved through the following technical solutions:
The test macro that a kind of hydraulic excavator main valve leaks wherein, comprising:
Actuating unit comprises interconnective motor and hydraulic pump, and described motor provides power to drive described hydraulic pump output hydraulic oil, and an end of described hydraulic pump is communicated with a fuel tank;
Reverse mechanism is the two-bit triplet reversal valve, comprises inlet, working hole and leakage fluid dram, and described inlet is connected with described hydraulic pump;
Governor motion comprises reduction valve and surplus valve, is used to regulate force value, and the leakage fluid dram of described reverse mechanism is connected with the tested hydraulic fluid port of described reduction valve, excavator operation valve successively;
Cooling body, an end is connected with the leakage fluid dram of described reverse mechanism with described surplus valve serial connection back, and the other end is connected with the working hole of described reverse mechanism, is used to cool off hydraulic fluid temperature;
Measuring mechanism comprises and measures frock and measuring cup that the hydraulic oil that described measurement frock is used for that the excavator operation valve is leaked out is collected the back and imported in the described measuring cup; And,
Indicating mechanism, comprise thermometer, first pressure gauge and second pressure gauge, described thermometer is located at the leakage fluid dram exit of described reverse mechanism, described first pressure gauge is located between described reduction valve and the tested hydraulic fluid port of excavator operation valve, and described second pressure gauge is located between described reduction valve and the described surplus valve.
The test macro that above-mentioned hydraulic excavator main valve leaks, wherein, described measurement frock comprises pallet, described pallet is fixed on the base by feet, described tray surface is provided with a leakage hole, described measuring cup height is less than the height of described measurement frock, and is placed between described pallet and the described base, and the amount mouth of described measuring cup faces the below of described leakage hole.
The test macro that above-mentioned hydraulic excavator main valve leaks, wherein, described leakage hole is positioned at the central authorities of described pallet.
The test macro that above-mentioned hydraulic excavator main valve leaks, wherein, the end that described cooling body is connected with the working hole of described reverse mechanism communicates with described fuel tank.
The test macro that above-mentioned hydraulic excavator main valve leaks, wherein, described cooling body cooling hydraulic fluid temperature to and remain on 50 ± 5 ℃.
Compared with the prior art, beneficial effect of the present invention is:
(1) at the leak-testing design of excavator operation valve, can understand the situation that the operation valve spool leaks, the quality of check operation valve;
(2) be applicable to the leak-testing of the excavator operation valve of various tonnages, also be applicable to the operation valve leak-testing of other part engineering machinery;
(3) the system architecture compactness is rationally distributed, and is easy and simple to handle, and measuring accuracy and high efficiency are fit to promote the use of.
Description of drawings
Fig. 1 is the structural representation of the test macro of hydraulic excavator main valve leakage of the present invention;
Fig. 2 is the measurement frock of the test macro that leaks of hydraulic excavator main valve of the present invention and the structural representation of measuring cup.
Embodiment
The invention will be further described below in conjunction with schematic diagram and concrete operations embodiment.
As shown in Figure 1, the test macro that hydraulic excavator main valve of the present invention leaks comprises actuating unit, reverse mechanism, governor motion, cooling body, measuring mechanism and indicating mechanism, actuating unit comprises interconnective motor 1 and hydraulic pump 2, and motor 1 provides power to drive hydraulic pump 2 output hydraulic oil; Reverse mechanism is a two-bit triplet reversal valve 3, comprises inlet, working hole and leakage fluid dram, and inlet is connected with hydraulic pump 2; Governor motion comprises reduction valve 5 and surplus valve 8, is used to regulate force value, and the leakage fluid dram of reverse mechanism 3 is connected with the tested hydraulic fluid port of reduction valve 5, excavator operation valve 10 successively; Cooling body 9 one ends are connected with the leakage fluid dram of reverse mechanism 3 with surplus valve 8 serial connection backs, and the other end is connected with the working hole of reverse mechanism 3, is used to cool off hydraulic fluid temperature; Measuring mechanism comprises measures frock 00 and measuring cup 01, and the hydraulic oil that measurement frock 00 is used for that the excavator operation valve is leaked out is collected the back and imported in the measuring cup 01; Indicating mechanism comprises thermometer 4, first pressure gauge 6 and second pressure gauge 7, thermometer 4 is located at the leakage fluid dram exit of reverse mechanism 3, and first pressure gauge 6 is located between reduction valve 5 and the excavator operation valve 10 tested hydraulic fluid ports, and second pressure gauge 7 is located between reduction valve 5 and the surplus valve 8.An end that cooling body 9 is connected with the working hole of reverse mechanism 3 and an end of hydraulic pump 2 all are communicated with a fuel tank 11.
Wherein, as shown in Figure 2, measure frock 00 and comprise pallet 001, pallet 001 is fixed on the base 003 by feet 002, pallet 001 surface is provided with a leakage hole 0010, measuring cup 01 height is less than the height of measuring frock 00, and is placed between pallet 001 and the base 003, and the amount mouth of measuring cup 01 faces the below of leakage hole 0010.
Further, leakage hole 0010 is positioned at the central authorities of pallet 001.
Above-mentioned each mechanism mainly is located on the hydro-test stand, interconnect by pipeline, when specifically testing, at first excavator operation valve 10 is placed the pallet 001 of measuring frock 00, guarantee that operation valve 10 is positioned in the middle of the pallet 001, and all hydraulic fluid port positions all can not exceed the edge of pallet 001, then by shown in Figure 1, hydraulic fluid port is inserted the hydraulic fluid port that excavator operation valve 10 needs test for leaks, install and just finished.Open motor 1, motor 1 obtains and exports hydraulic oil in providing power drive hydraulic pump 2 from fuel tank 11, press the button of two-bit triplet reversal valve 3, regulate surplus valve 8 to second pressure gauges 7 and show that pressure is 10MPa, allow system's operation a period of time, allow hydraulic oil heat up, demonstrate temperature until thermometer 4.Open the switch of cooling system 9, make hydraulic fluid temperature remain on 50 ± 5 ℃, begin to regulate reduction valve 5 to first pressure gauges 6 and show that pressure is 6.9Mpa, allow total system move about 15 minutes then, excavator operation valve 10 all the other all working pressure mouths, drain tap, pilot port all are in the position of opening at this moment, pressure oil will be gone out by the slot leakage of reversal valve 10, when the hydraulic oil that flows down when the leakage hole 0010 of measuring frock 00 forms stable thread, just can begin to have measured.Measuring cup 01 is placed on connects hydraulic oil below the leakage hole 0010 and pick up counting, take out measuring cup 01 after ten minutes, how many L/min read this pressure port leakage rate that just can calculate excavator operation valve 10 behind the hydraulic oil volume in the measuring cup 01 is.Survey this pressure port, two-bit triplet reversal valve 3 has been resetted, testing table pressure hydraulic fluid port has been pulled down the another one pressure port that inserts excavator operation valve 10, proceeded test.
In sum, the present invention has realized the hydraulic oil internal leakage test to the excavator operation valve of various tonnages smoothly, compact conformation, and easy to operate, test is accurate, high efficiency.
More than specific embodiments of the invention are described in detail, but the present invention is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any test macro that this hydraulic excavator main valve is leaked equivalent modifications of carrying out and substituting also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of having done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (5)
1. the test macro that the hydraulic excavator main valve leaks is characterized in that, comprising:
Actuating unit comprises interconnective motor and hydraulic pump, and described motor provides power to drive described hydraulic pump output hydraulic oil, and an end of described hydraulic pump is communicated with a fuel tank;
Reverse mechanism is the two-bit triplet reversal valve, comprises inlet, working hole and leakage fluid dram, and described inlet is connected with described hydraulic pump;
Governor motion comprises reduction valve and surplus valve, is used to regulate force value, and the leakage fluid dram of described reverse mechanism is connected with the tested hydraulic fluid port of described reduction valve, excavator operation valve successively;
Cooling body, an end is connected with the leakage fluid dram of described reverse mechanism with described surplus valve serial connection back, and the other end is connected with the working hole of described reverse mechanism, is used to cool off hydraulic fluid temperature;
Measuring mechanism comprises and measures frock and measuring cup that the hydraulic oil that described measurement frock is used for that the excavator operation valve is leaked out is collected the back and imported in the described measuring cup; And,
Indicating mechanism, comprise thermometer, first pressure gauge and second pressure gauge, described thermometer is located at the leakage fluid dram exit of described reverse mechanism, described first pressure gauge is located between described reduction valve and the tested hydraulic fluid port of excavator operation valve, and described second pressure gauge is located between described reduction valve and the described surplus valve.
2. the test macro that hydraulic excavator main valve according to claim 1 leaks, it is characterized in that, described measurement frock comprises pallet, described pallet is fixed on the base by feet, described tray surface is provided with a leakage hole, described measuring cup height is less than the height of described measurement frock, and is placed between described pallet and the described base, and the amount mouth of described measuring cup faces the below of described leakage hole.
3. the test macro that hydraulic excavator main valve according to claim 2 leaks is characterized in that described leakage hole is positioned at the central authorities of described pallet.
4. the test macro that hydraulic excavator main valve according to claim 1 leaks is characterized in that the end that described cooling body is connected with the working hole of described reverse mechanism communicates with described fuel tank.
5. the test macro that hydraulic excavator main valve according to claim 1 leaks is characterized in that, described cooling body cooling hydraulic fluid temperature to and remain on 50 ± 5 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110116378 CN102213635B (en) | 2011-05-06 | 2011-05-06 | Testing system for main valve leakage of hydraulic excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110116378 CN102213635B (en) | 2011-05-06 | 2011-05-06 | Testing system for main valve leakage of hydraulic excavator |
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| CN102213635A true CN102213635A (en) | 2011-10-12 |
| CN102213635B CN102213635B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110116378 Expired - Fee Related CN102213635B (en) | 2011-05-06 | 2011-05-06 | Testing system for main valve leakage of hydraulic excavator |
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Cited By (3)
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| CN102680227A (en) * | 2012-06-14 | 2012-09-19 | 上海三一重机有限公司 | Performance detection test stand for main valve of hydraulic excavator |
| CN103148056A (en) * | 2013-03-21 | 2013-06-12 | 南京工业大学 | Hydraulic device leakage measuring device |
| CN103424232A (en) * | 2012-05-21 | 2013-12-04 | 广西大学 | Fuel oil leakage detecting device for vehicle-mounted oil vapor recovery device control valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103424232A (en) * | 2012-05-21 | 2013-12-04 | 广西大学 | Fuel oil leakage detecting device for vehicle-mounted oil vapor recovery device control valve |
| CN103424232B (en) * | 2012-05-21 | 2015-10-14 | 广西大学 | A kind of vehicle-mounted oil vapor recovery device operation valve fuel leakage pick-up unit |
| CN102680227A (en) * | 2012-06-14 | 2012-09-19 | 上海三一重机有限公司 | Performance detection test stand for main valve of hydraulic excavator |
| CN102680227B (en) * | 2012-06-14 | 2014-10-01 | 上海三一重机有限公司 | Performance detection test stand for main valve of hydraulic excavator |
| CN103148056A (en) * | 2013-03-21 | 2013-06-12 | 南京工业大学 | Hydraulic device leakage measuring device |
| CN103148056B (en) * | 2013-03-21 | 2015-03-25 | 南京工业大学 | Hydraulic device leakage measuring device |
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| CN102213635B (en) | 2013-06-12 |
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