CN104792972A - Portable device for testing air content of hydraulic system - Google Patents
Portable device for testing air content of hydraulic system Download PDFInfo
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- CN104792972A CN104792972A CN201510200282.4A CN201510200282A CN104792972A CN 104792972 A CN104792972 A CN 104792972A CN 201510200282 A CN201510200282 A CN 201510200282A CN 104792972 A CN104792972 A CN 104792972A
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Abstract
The invention discloses a portable device for testing the air content of a hydraulic system. An oil inlet of a closed cavity body is connected with a needle globe valve, and a hydraulic medium enters the closed cavity body of an air content test instrument through the needle globe valve; the closed cavity body is connected with a temperature sensor and a pressure sensor used for detecting temperature and pressure respectively, a piston and a lead screw fixedly connected with the piston are mounted in the closed cavity body, a driving mechanism is connected with the closed cavity body, and the driving mechanism is connected with the lead screw and used for driving lead screw and the piston to axially move. A vacuum chamber is formed by adopting motion of the lead screw and the piston, so that oil-liquid separation is finished and connection with a pipeline of the hydraulic system can be cut off in measurement; the device is small in volume and portable, thereby realizing portable measurement; moreover, the device has manual and automatic modes, thereby being strong in feasibility and wide in applicability.
Description
Technical field
The present invention relates to a kind of hydraulic system air air content proving installation, particularly relate to a kind of portable hydraulic system air air content proving installation.
Background technology
The hydraulic reservoir of many hydraulic systems adopts solution-air contact pressurized fuel tank, the solubleness causing air in hydraulic oil increased, the liquid level simultaneously in hydraulic reservoir is too low, accelerates the circulation of hydraulic oil, make bubble discharge difficulty, and cause air to enter hydraulic oil from outside; Secondly, hydraulic system pipeline mounting head is poorly sealed, air perisporium and guiding-tube bend position have the reason such as uneven that air also can be caused to be mixed into hydraulic system.
Air air content as the important indicator of hydraulic oil pollution, on the serious impact that the celerity of pressure wave in the viscosity of the modulus of volume elasticity of the hydraulic oil of hydraulic system, hydraulic oil, hydraulic oil will produce.Hydraulic oil air content crosses the condition of work that senior general worsens hydraulic pump and whole hydraulic system, reduce fuel delivery and the efficiency of hydraulic pump of hydraulic pump, also can cause hydraulic oil liquid impact, the cavitation erosion damage of hydraulic pump, pipeline pressure pulsation, so that produce the noise caused due to the discontinuous flowing of hydraulic oil.It is power source that Today, most air content pick-up unit mostly is vacuum pump, and shared volume is excessive, quality is overweight, can not carry, and the air content that can only realize specific environment detects, and does not have universal applicability.
Summary of the invention
The object of the present invention is to provide a kind of portable hydraulic system air air content proving installation, drive leading screw to replace vacuum pump with hand-crank or small type stepping motor, in closed cavity, form vacuum thus carry out gas-oil separation.Ensure that little, light, the portable requirement of air content tester volume, greatly improve the range of application of this device.Simultaneously both can manual operation, can intervene without the need to personnel again, exploitativeness is strong.
The technical solution used in the present invention is:
The present invention includes needle stop valve, closed cavity, leading screw, driving mechanism; Closed cavity oil-in is connected with needle stop valve, and hydraulic medium enters the closed cavity of air content tester by needle stop valve; Closed cavity is connected with the temperature sensor and pressure transducer that are respectively used to detected temperatures and pressure, closed cavity is built with piston and the leading screw that is fixedly connected with piston, driving mechanism is connected with closed cavity, driving mechanism and leading screw connecting band movable wire thick stick and piston axially-movable.
Described driving mechanism comprises hand-crank, drive motor, crank gear, motor gear, double crosslinking sliding gear, worm gear, worm screw; Drive motor output shaft is coaxially fixedly connected with hand-crank successively with motor gear, crank gear, driven shaft to be arranged on driving mechanism casing and parallel with drive motor output shaft, double crosslinking sliding gear and worm screw coaxial sleeve are on driven shaft, and double crosslinking sliding gear axially to be moved and spacing along driven shaft by spline between motor gear and crank gear; Worm gear and worm mesh axial restraint, described leading screw is coaxially connected with displacement transducer through after worm gear, and leading screw and worm wheel helical are connected.
The hydraulic medium that described hydraulic system adopts is phosphate-based fire resistant fluid force feed and petroleum base hydraulic oil.
Described worm gear and the gear train of worm screw have auto-lock function, bear the hydraulic medium pressure of hydraulic system.
The hydraulic medium pressure of described hydraulic system is less than or equal to 1MPa.
The beneficial effect that the present invention has is:
The present invention is sampled by the needle stop valve of air content tester, and can disconnect after sampling terminates and measuring with the connection of pipeline, and volume is little, quality light, has and can carry measurement, applied environment is wide, a little practical.
The present invention adopts hand-crank and stepper motor two kinds of type of drive dress to change, both can manual operation, and can intervene without the need to personnel again, exploitativeness is strong.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of Non-follow control of the present invention.
Fig. 2 is the structural principle schematic diagram of Electronic control of the present invention.
In figure: 1. closed cavity; 2. temperature sensor; 3. leading screw; 4. driving mechanism; 5. double crosslinking sliding gear; 6. hand-crank; 7. crank gear; 8. motor gear; 9. displacement transducer; 10. drive motor; 11. worm screws; 12. worm gears; 13. pressure transducers; 14. pistons; 15 needle stop valves.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the present invention includes needle stop valve 15, closed cavity 1, leading screw 3, driving mechanism 4; Closed cavity 1 oil-in is connected with needle stop valve 15, and hydraulic medium enters the closed cavity 1 of air content tester by needle stop valve 15; Closed cavity 1 is connected with the temperature sensor 2 and pressure transducer 13 that are respectively used to detected temperatures and pressure, closed cavity 1 is built with piston 14 and the leading screw 3 that is fixedly connected with piston 14, driving mechanism 4 is connected with closed cavity 1, driving mechanism 4 and leading screw 3 connecting band movable wire thick stick 3 and piston 14 axially-movable.
Driving mechanism 4 comprises hand-crank 6, drive motor 10, crank gear 7, motor gear 8, double crosslinking sliding gear 5, worm gear 12, worm screw 11; Drive motor 10 output shaft is coaxially fixedly connected with hand-crank 6 successively with motor gear 8, crank gear 7, driven shaft to be arranged on driving mechanism 4 casing and parallel with drive motor 10 output shaft, double crosslinking sliding gear 5 and worm screw 11 coaxial sleeve are on driven shaft, and double crosslinking sliding gear 5 axially to be moved and spacing along driven shaft by spline between motor gear 8 and crank gear 7; Worm gear 12 engages with worm screw 11 and axial restraint, and described leading screw 3 is coaxially connected with displacement transducer 9 through after worm gear 12, and leading screw 3 is connected with worm gear 12 threaded engagement.
The hydraulic medium that hydraulic system adopts is phosphate-based fire resistant fluid force feed and petroleum base hydraulic oil.
Worm gear 12 has auto-lock function with the gear train of worm screw 11, bears the hydraulic medium pressure of hydraulic system.
The hydraulic medium pressure of hydraulic system is less than or equal to 1MPa.
The specific embodiment of the invention course of work is as follows:
As depicted in figs. 1 and 2, before measuring, air content tester leading screw 3 and piston 14 are in topmost, without any medium in closed cavity 1.Open needle stop valve 15, as the fluid of hydraulic medium moving down by leading screw 3 and piston 14 in hydraulic system, enter the closed cavity 1 of air content tester through needle stop valve 15.After sampling terminates, close needle stop valve 15, air content tester and hydraulic system are disconnected, start air content and detect.The movable of leading screw 3 and piston 14 is realized by two kinds of modes: the rotation of hand-crank 6 and the electronic of drive motor 10, and both conversion is by the movement of double crosslinking sliding gear 5.
As shown in Figure 1, engage with crank gear 7 when double crosslinking sliding gear 5 is in left position, the transmission of hand-crank 6 rotation driven gear, worm and gear are rotated, and realize the movement of leading screw 3 and piston 14.As shown in Figure 2, engage with motor gear 8 when double crosslinking sliding gear 5 is in right position, the transmission of drive motor 10 rotation driven gear, worm and gear are rotated, and realize the movement of leading screw 3 and piston 14.Leading screw 3 and piston 14 move down, and closed cavity 1 realizes near vacuum, and the hydraulic medium in closed cavity 1 will carry out gas-oil separation.After being fully separated, by temperature sensor 2, pressure transducer 13 and displacement transducer 9, obtain the temperature after hydraulic medium gas-oil separation, pressure and volume.Then the content of air in hydraulic medium can be obtained again according to the state equation of ideal gas.Define according to air content thus try to achieve air content.
Air content temperature sensor that tester is equipped with 2, pressure transducer 13 and displacement transducer 9 in the present invention, be respectively used to measure temperature, pressure and the volume before and after the hydraulic medium gas-oil separation in closed cavity 1.
The temperature sensor 2 of the present invention in concrete enforcement, pressure transducer 13, displacement transducer 9 all adopt existing product, can adopt PT100-STT-S temperature sensor, HM91 pressure transducer, RGH24-RGS20 grating scale displacement transducer respectively as embodiment, drive motor 10 can adopt stepper motor.
Above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (5)
1. a portable hydraulic system air air content proving installation, is characterized in that: comprise needle stop valve (15), closed cavity (1), leading screw (3), driving mechanism (4); Closed cavity (1) oil-in is connected with needle stop valve (15), and hydraulic medium enters the closed cavity (1) of air content tester by needle stop valve (15); Closed cavity (1) is connected with the temperature sensor (2) and pressure transducer (13) that are respectively used to detected temperatures and pressure, closed cavity (1) is built with piston (14) and the leading screw (3) that is fixedly connected with piston (14), driving mechanism (4) is connected with closed cavity (1), driving mechanism (4) and leading screw (3) connecting band movable wire thick stick (3) and piston (14) axially-movable.
2. a kind of portable hydraulic system air air content proving installation according to claim 1, is characterized in that: described driving mechanism (4) comprises hand-crank (6), drive motor (10), crank gear (7), motor gear (8), double crosslinking sliding gear (5), worm gear (12), worm screw (11); Drive motor (10) output shaft is coaxially fixedly connected with hand-crank (6) successively with motor gear (8), crank gear (7), driven shaft to be arranged on driving mechanism (4) casing and parallel with drive motor (10) output shaft, double crosslinking sliding gear (5) and worm screw (11) coaxial sleeve are on driven shaft, and double crosslinking sliding gear (5) axially to be moved and spacing along driven shaft by spline between motor gear (8) and crank gear (7); Worm gear (12) engages with worm screw (11) and axial restraint, and described leading screw (3) is coaxially connected with displacement transducer (9) afterwards through worm gear (12), and leading screw (3) is connected with worm gear (12) threaded engagement.
3. a kind of portable hydraulic system air air content proving installation according to claim 1, is characterized in that: the hydraulic medium that described hydraulic system adopts is phosphate-based fire resistant fluid force feed and petroleum base hydraulic oil.
4. a kind of portable hydraulic system air air content proving installation according to claim 2, is characterized in that: described worm gear (12) has auto-lock function with the gear train of worm screw (11), bears the hydraulic medium pressure of hydraulic system.
5. a kind of portable hydraulic system air air content proving installation according to claim 1, is characterized in that: the hydraulic medium pressure of described hydraulic system is less than or equal to 1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510200282.4A CN104792972B (en) | 2015-04-26 | 2015-04-26 | Portable hydraulic system air air content proving installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510200282.4A CN104792972B (en) | 2015-04-26 | 2015-04-26 | Portable hydraulic system air air content proving installation |
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| CN104792972A true CN104792972A (en) | 2015-07-22 |
| CN104792972B CN104792972B (en) | 2016-04-13 |
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| CN201510200282.4A Active CN104792972B (en) | 2015-04-26 | 2015-04-26 | Portable hydraulic system air air content proving installation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105435564A (en) * | 2015-11-16 | 2016-03-30 | 滁州市博康模具塑料有限公司 | Oil-water separation device special for portable injection molding machine |
| CN107061667A (en) * | 2017-04-20 | 2017-08-18 | 浙江大学 | A kind of transmission mechanism for being used for instrument for measuring gas content imbibition and vacuumizing |
| CN111272986A (en) * | 2020-04-08 | 2020-06-12 | 温州顺创智能科技有限公司 | Hydraulic oil acidity detection equipment in hydraulic valve |
| CN113358853A (en) * | 2021-06-18 | 2021-09-07 | 兰州理工大学 | Portable hydraulic system oil gas content on-line automatic detection device |
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| CN204177800U (en) * | 2014-11-12 | 2015-02-25 | 国家电网公司 | A kind of transformer oil gas-detecting device |
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2015
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| FR2572530B1 (en) * | 1984-10-26 | 1986-12-26 | Armines | AUTOMATIC APPARATUS FOR MEASURING VAPORIZED FRACTIONS OF PURE AND / OR MIXED BODIES AND LIQUID AND / OR VAPOR PHASE DENSITIES WITH SAMPLING OF VAPOR PHASE SAMPLES |
| CN87201133U (en) * | 1987-03-25 | 1988-01-06 | 复旦大学 | Air-containing capacity in electric insulating oil measuring device |
| DE29606210U1 (en) * | 1996-04-04 | 1996-06-20 | FEV Motorentechnik GmbH & Co. KG, 52078 Aachen | Device for measuring the gas content in liquids |
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| CN103513011A (en) * | 2013-10-23 | 2014-01-15 | 杭州申昊信息科技有限公司 | Automatic calibration device for gas in transformer oil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105435564A (en) * | 2015-11-16 | 2016-03-30 | 滁州市博康模具塑料有限公司 | Oil-water separation device special for portable injection molding machine |
| CN107061667A (en) * | 2017-04-20 | 2017-08-18 | 浙江大学 | A kind of transmission mechanism for being used for instrument for measuring gas content imbibition and vacuumizing |
| CN107061667B (en) * | 2017-04-20 | 2019-09-13 | 浙江大学 | It is a kind of for instrument for measuring gas content imbibition and the transmission mechanism vacuumized |
| CN111272986A (en) * | 2020-04-08 | 2020-06-12 | 温州顺创智能科技有限公司 | Hydraulic oil acidity detection equipment in hydraulic valve |
| CN113358853A (en) * | 2021-06-18 | 2021-09-07 | 兰州理工大学 | Portable hydraulic system oil gas content on-line automatic detection device |
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| Publication number | Publication date |
|---|---|
| CN104792972B (en) | 2016-04-13 |
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