CN106837933B - A kind of quick accurate detecting method and device of internal leakage of hydraulic valve amount - Google Patents
A kind of quick accurate detecting method and device of internal leakage of hydraulic valve amount Download PDFInfo
- Publication number
- CN106837933B CN106837933B CN201710189667.4A CN201710189667A CN106837933B CN 106837933 B CN106837933 B CN 106837933B CN 201710189667 A CN201710189667 A CN 201710189667A CN 106837933 B CN106837933 B CN 106837933B
- Authority
- CN
- China
- Prior art keywords
- internal leakage
- hydraulic valve
- valve
- shaft
- flabellum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of quick accurate detecting method of internal leakage of hydraulic valve amount and devices, belong to internal leakage of hydraulic valve amount detection technique field.Apparatus of the present invention include for air circuit, and for being connected to pneumatic rotary shaft flowmeter on air circuit, pneumatic rotary shaft flowmeter is mounted between air circuit and hydraulic valve oil inlet pipe to be measured；The pneumatic rotary shaft flowmeter includes the axis with flabellum, and magnetic strength current display device is stretched out from shell and connected in one end of the axis with flabellum, and magnetic strength current display device is connected to amplifying circuit, and amplifying circuit connects the ammeter for showing induction current intensity.The quick accurate detecting method of the present invention, including measuring device calibration, measurement and measure batch and etc., realize quick, accurate, batch the detection to internal leakage of hydraulic valve amount.
Description
Technical field
The present invention relates to leakage detection method and devices in a kind of hydraulic valve, belong to hydraulic valve detection technique field.
Background technique
Hydraulic valve commutation working principle be：By external force（It can be electromagnetic force, fluid power or manual actuation power etc.）Drive pushes away
Bar makes spool generate the opposite sliding relative to valve body, opens or closes corresponding oil circuit, achievees the purpose that convert oil circuit.?
In the above process, in order to ensure smooth movement of the spool in valve body, needs to keep certain gap between the two, otherwise can make
It is in close contact at spool and valve body, frictional force is excessive and can not act.Due to the presence of spool and valve body fit clearance, it may appear that
At work, hydraulic oil is flowed to the physical phenomenon of low-pressure area by the higher-pressure region of valve to hydraulic valve, and this flowing occurs in hydraulic valve
Portion, referred to as internal leakage.In addition, valve body is had damage with spool contact line (face), not closely sealed each other, the spool front end conical surface and spool
Outer circle and valve body hole fit clearance produce in hole greatly when outer circle is not coaxial, valve body hole and spool concentricity are overproof, spool assembles
Manufactures or the assembling quality failures such as raw skew press fitting, are likely to lead to internal leakage of hydraulic valve.
The internal leakage of hydraulic valve is different from external leakage, external leakage refer to hydraulic valve with the junction of other Hydraulic Elements to
The phenomenon that outer oil leak.External leakage is intuitive, easily observes, is easy to avoid；And internal leakage then mostly occurs inside hydraulic valve, is not easy to see
It examines, and not can avoid, i.e., hydraulic valve more or less has internal leakage.Therefore when manufacturing and assembling hydraulic valve, generally by valve
Gap control between core and valve body is in a certain range（It is mostly the diametric clearance of 5-30um in engineering）, correspondingly, correspond between being somebody's turn to do
The internal leakage of the hydraulic oil of gap range just becomes one of the key property for measuring hydraulic valve.Internal leakage is excessive, can make hydraulic
Executing agency's movement that system assembles host is not in place, it is difficult to which accurate control action track also occurs that from acting when serious, makes
At security risk.
There are two types of the existing detection techniques to internal leakage of hydraulic valve amount：First is that the drop number of manual record leakage fluid, then turns
It is changed to ml, or is collected and measured with measuring cup, there is be affected by human factors big, detection for this detection mode
The disadvantages of low efficiency, it is difficult to meet the high-volume automation quality inspection requirements of hydraulic valve；Second is that measuring stream by flow sensor
The problem of magnitude, then carries out being calculated leakage magnitude, this detection method is current flow sensor in micro-, small stream
It is difficult to that the accuracy for measuring or measuring is very low in the case where amount, is unable to satisfy the requirement that range ability is big, measurement accuracy is high.
It separately looks into from presently disclosed patented technology and newly obtains：Yu Zhonghua and Lu Bin（Number of patent application：
201110403891.1）The innovation of " a kind of internal leakage detection device of hydraulic valve " that is proposed is to pass using weighing
The modern electronic technologies such as sensor, transmitter, SCM system, display chip means to the metering method of internal leakage of hydraulic valve amount into
It has gone improvement, and has not related to and propose substantive innovation on the testing principle of internal leakage of hydraulic valve amount and method.Shen Yan
Health etc.（Number of patent application：201210367976.3）" a kind of detection method and its device of internal leakage of hydraulic valve " proposed
In, detection method is surveyed hydraulic cylinder and the access of tested solution pressure valve by the way of hydraulic cylinder and displacement sensor combination
In test tube road, by detecting the displacement of hydraulic cylinder piston, the leakage rate of tested solution pressure valve in a period of time is conversed.This is specially
Benefit does not provide conversion proof procedure without clearly discussing method foundation yet, discusses according to insufficient, consultant can not obtain
Know the true spirit of its claimed method.
Summary of the invention
Place in order to overcome the above-mentioned deficiencies of the prior art, the present invention provide a kind of the quick accurate of internal leakage of hydraulic valve amount
Detection method and device realize quick, accurate, batch the detection to internal leakage of hydraulic valve amount.
The present invention is achieved through the following technical solutions：A kind of device for fast detecting of internal leakage of hydraulic valve amount, including
By air pump, divide that water water filter, pressure reducing valve, throttle valve and shut-off valve constitutes for air circuit, for being connected to pneumatic shaft on air circuit
Formula flowmeter, pneumatic rotary shaft flowmeter are mounted between air circuit and hydraulic valve oil inlet pipe to be measured；
The pneumatic rotary shaft flowmeter includes shell, there is the venting cavity with gas outlet and air inlet on shell
One horizontal axocoel is arranged at body, ventilation cavity lower part, there is the axis with flabellum that can be rotated with gas flowing in horizontal axocoel,
Axis with flabellum is mounted in the horizontal axocoel by bearing, gasket seal and bearing (ball) cover, one end of the axis with flabellum from
Shell stretches out and connects magnetic strength current display device, and magnetic strength current display device includes sinking what the shaft end of the axis with flabellum made
Hole is fixed with the magnet bushing that can be rotated with the axis with flabellum in counterbore, and magnet bushing have holding screw to couple with hole inner wall, axis
The outside at end is installed with nut, there is through-hole on nut, is equipped in the counterbore faradic with the cooperation generation of magnet bushing
Coil, the both ends of coil pass through from the through-hole of nut and are connected to amplifying circuit, and amplifying circuit is connected for showing induced current
The ammeter of intensity.
One end of the axis with flabellum, which is stretched out from shell and amplifies transmission by revolving speed, is connected with shaft, the magnetic strength
Current display device is mounted in shaft,
Magnetic strength current display device includes the counterbore made in the shaft end of shaft, and being fixed in counterbore can be with shaft rotation
Magnet bushing, magnet bushing have holding screw to couple with hole inner wall, and the outside of shaft end is installed with nut, there is through-hole, institute on nut
It states to be equipped in counterbore and generates faradic coil with the cooperation of magnet bushing, the both ends of coil pass through and connect from the through-hole of nut
It is connected to amplifying circuit, amplifying circuit connects the ammeter for showing induction current intensity.
The revolving speed amplification transmission is V belt translation pair, and V belt translation pair includes big belt wheel, transmission belt and small pulley, big belt wheel
It is fixed on the axis with flabellum by belt wheel axial end cap and holding screw.
The ammeter is digital display ammeter or simulation table.
A kind of quick accurate detecting method of the internal leakage of hydraulic valve amount using described device, includes the following steps,
The first step, measuring device calibration：
Testing principle is：Measure loop generates air-flow, and the changes in flow rate of internal leakage gas can be embodied on flow velocity, measures gas
Body change in flow would know that changes in flow rate, when changes in flow rate, the revolving speed of the axis with flabellum can be made to change, different revolving speeds
Variation the induced current of varying strength can be generated in magnetic strength current display device, can intuitively be read by the instruction of ammeter
The size of internal leakage out；
It chooses or pre- one internal leakage of hydraulic valve of production is the minimum internal leakage calibrating valve W of permissionaIt is maximum with a permission
Internal leakage calibrating valve Wb, first will install to form measure loop for the gentle turn shaft type flowmeter of air circuit, by pneumatic rotary shaft
Flowmeter is connected to WaOil inlet P on, oil outlet T is emptied in gas, remaining mouth block, adjust for air circuit pressure reducing valve, cut-off
Valve and throttle valve make the ammeter of the pneumatic rotary shaft flowmeter have registration, write down registration I at this timeaTo determine Va；It again will inspection
Survey time road is connected to WbOn, write down WbRegistration IbTo determine Vb, Vb-VaRange be hydraulic valve internal leakage to be measured qualified model
It encloses；
Second step, measurement：
Get out batch testing air inlet pipe, batch testing air inlet pipe have a test interface and multiple and batch testing into
The hydraulic valve to be measured that tracheae is connected, each corresponding shut-off valve of hydraulic valve to be measured,
After the completion of the calibration of upper step, it will test circuit and be connected to test interface, sequentially open the cut-off of multiple hydraulic valves to be measured
Valve measures the internal leakage of this group of hydraulic valve, if test result is in Vb-VaIn the range of be then qualification, go beyond the scope then as not
Qualification, i.e., the registration I of ammeter is in IaAnd IbBetween be it is qualified, it is on the contrary then unqualified；Next group of replacement is surveyed.
Amplify transmission equipped with revolving speed in one end of the axis with flabellum, transmission progress speed is amplified by revolving speed and is put
Greatly, induction current intensity is further enhanced, measurement sensitivity is improved.
The beneficial effects of the invention are as follows：
1, the present invention replaces pressure oil using pressed gas, since the density of gas is far smaller than the density of liquid, therefore rises
The effect of Flow amplification is arrived, this measure overcomes insensitive disadvantage when measuring small, micrometeor using flow sensor.
It 2, is that the gage works such as counting, the weighing of leakage rate oil droplet are converted by existing using pneumatic internal leakage flowmeter
For the reading of the rotation speed change range to the axis with flabellum；No matter the reading of subsequent internal leakage size uses reading type or counts
Explicitly, uninterrupted can be all directly obtained, measuring principle is enormously simplified, keeps measurement intuitive easy；Small rotation speed change turns
More sensitive curent change is turned to, induced current is followed by either simulating electricity to digital display ammeter by transistor amplifier
It in flow table, can directly read, so that it may size that is sensitive and intuitively reading internal leakage.
3, low to measurement methods measurement efficiencies such as counting, the weighings of leakage rate oil droplet, the present invention is implemented without waiting for drop
Oil substantially increases measurement efficiency.
If 4, carrying out logical pressure oil measurement, every hydraulic valve must all lead to oil in measurement, can not keep away after measurement
Exempt from the internal oil passages of valve adhesion hydraulic oil, can not quickly clean in short-term, hydraulic oil can also flow out when standing, pollute warehouse
Ground；And the method for the present invention is used to measure, then the above problem can be effectively avoided, no hydraulic oil loss has been saved the energy, protected
Environment.
Detailed description of the invention
Below according to drawings and examples, the present invention is further described.
Fig. 1 is schematic structural view of the invention；
Fig. 2 is pneumatic rotary shaft flowmeter structure schematic diagram；
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is the B-B sectional view of Fig. 3；
Fig. 5 is to invent another example structure schematic diagram；
Fig. 6 is detection method first step measuring device calibration schematic diagram；
Fig. 7 is detection method batch detection schematic diagram.
In figure, 1, air pump, 2, divide water water filter, 3, pressure reducing valve, 4, shut-off valve, 5, throttle valve, 6, air gauge, 7, pneumatic turn
Shaft type flowmeter, 7-1, shell, 7-2, the axis with flabellum, 7-3, bearing, 7-4, gasket seal, 7-5, bearing (ball) cover, 7-6, magnetic
Iron bushing, 7-7, coil, 7-8, nut, 7-9, amplifying circuit, 7-10, ammeter, 7-11, shaft, 7-12, V belt translation pair, 7-
13, end cap, 8, hydraulic valve to be measured, 8-1, spool, 8-2, valve body；9, batch testing air inlet pipe, 9-1, test interface, Wa, allow
Minimum internal leakage calibrating valve, Wb, allow maximum internal leakage calibrating valve.
Specific embodiment
Below with reference to embodiment, the present invention is further described.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of device for fast detecting of internal leakage of hydraulic valve amount, including by air pump 1, divide water to filter
Hydrophone 2, pressure reducing valve 3, throttle valve 5 and shut-off valve 4 constitute for air circuit, for being connected to pneumatic rotary shaft flowmeter 7 on air circuit,
Pneumatic rotary shaft flowmeter 7 is mounted between 8 oil inlet pipe of air circuit and hydraulic valve to be measured；
The pneumatic rotary shaft flowmeter 7 includes shell 7-1, have on shell 7-1 one with gas outlet and air inlet
One horizontal axocoel is arranged at ventilation cavity, ventilation cavity lower part, there is the band fan that can be flowed and rotate with gas in horizontal axocoel
The axis 7-2 of leaf, the axis 7-2 with flabellum are mounted on the horizontal axocoel by bearing 7-3, gasket seal 7-4 and bearing (ball) cover 7-5
Interior, magnetic strength current display device, magnetic strength current display device packet are stretched out from shell 7-1 and connected in one end of the axis 7-2 with flabellum
The counterbore in the production of the shaft end of the axis 7-2 with flabellum is included, the magnet bushing that can be rotated with the axis 7-2 with flabellum is fixed in counterbore
7-6, magnet bushing have holding screw to couple with hole inner wall, and the outside of shaft end is installed with nut 7-8, there is through-hole, institute on nut 7-8
It states to be equipped in counterbore and generates faradic coil 7-7 with magnet bushing 7-6 cooperation, the both ends of coil 7-7 are from nut 7-8's
Through-hole passes through and is connected to amplifying circuit 7-9, and amplifying circuit 7-9 connection is for showing the ammeter 7-10 of induction current intensity.
Connect as shown in figure 5, one end of the axis 7-2 with flabellum is stretched out from shell 7-1 and amplifies transmission by revolving speed
It is connected to shaft 7-11, the magnetic strength current display device is mounted on shaft 7-11, and magnetic strength current display device is included in shaft
The counterbore of the shaft end production of 7-11, is fixed with the magnet bushing 7-6 that can be rotated with shaft 7-11 in counterbore, in magnet bushing and hole
Wall has holding screw connection, and the outside of shaft end is installed with nut 7-8, there is through-hole on nut 7-8, is equipped in the counterbore and magnetic
Iron bushing 7-6 cooperation generates faradic coil 7-7, and the both ends of coil 7-7, which pass through and are connected to from the through-hole of nut 7-8, puts
Big circuit 7-9, amplifying circuit 7-9 connection is for showing the ammeter 7-10 of induction current intensity.Amplify transmission by revolving speed
Speed amplification is carried out, induction current intensity is further enhanced, improves measurement sensitivity.
The revolving speed amplification transmission is V belt translation secondary 7-12, and V belt translation secondary 7-12 includes big belt wheel, transmission belt and small band
Wheel, big belt wheel are fixed on the axis 7-2 with flabellum by belt wheel axial end cap 7-13 and holding screw.
The ammeter 7-10 is digital display ammeter or simulation table.
In use, the axis 7-2 with flabellum rotates, the coil 7- that band moving magnet bushing 7-6 is and then rotated, and placed in counterbore
7 are followed by digital display ammeter either mould by transistor amplifier due to cutting magnetic line meeting induced current, induced current
On quasi- ammeter, can directly it read.If the current indication of institute's side valve is more than allowed band, the internal leakage of valve is exceeded；Otherwise it is
It is qualified.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 6, Fig. 7, a kind of internal leakage of hydraulic valve amount using described device it is quick accurate
Detection method includes the following steps,
A kind of quick accurate detecting method of the internal leakage of hydraulic valve amount using described device, includes the following steps,
The first step, measuring device calibration：
Testing principle is：Measure loop generates air-flow, and the changes in flow rate of internal leakage gas can be embodied on flow velocity, measures gas
Body change in flow would know that changes in flow rate, when changes in flow rate, the revolving speed of the axis 7-2 with flabellum can be made to change, different
The variation of revolving speed can generate the induced current of varying strength in magnetic strength current display device, pass through the instruction energy of ammeter 7-10
The intuitive size for reading internal leakage；
It chooses or pre- one internal leakage of hydraulic valve of production is the minimum internal leakage calibrating valve W of permissionaIt is maximum with a permission
Internal leakage calibrating valve Wb, first will install to form measure loop for the gentle turn shaft type flowmeter 7 of air circuit, by pneumatic rotary shaft
Flowmeter 7 is connected to WaOil inlet P on, oil outlet T is emptied in gas, remaining mouth block, adjust for air circuit pressure reducing valve 3, cut
Only valve 4 and throttle valve 5 make the ammeter 7-10 of the pneumatic rotary shaft flowmeter 7 have registration, write down registration I at this timeaWith determination
Va；It will test circuit again and be connected to WbOn, write down WbRegistration IbTo determine Vb, Vb-VaRange be hydraulic valve internal leakage to be measured
Acceptability limit；
Second step, measurement：
Batch testing air inlet pipe 9 is got out, batch testing air inlet pipe 9 has a test interface 9-1 and multiple and batch
The hydraulic valve to be measured 8 that air inlet pipe 9 is connected is tested, each hydraulic valve 8 to be measured corresponds to a shut-off valve,
After the completion of the calibration of upper step, it will test circuit and be connected to test interface 9-1, sequentially open multiple hydraulic valves to be measured 8
Shut-off valve measures the internal leakage of this group of hydraulic valve, if test result is in Vb-VaIn the range of then for qualification, go beyond the scope then
To be unqualified, i.e. the registration I of ammeter 7-10 is in IaAnd IbBetween be it is qualified, it is on the contrary then unqualified；Next group of replacement is surveyed.
Amplify transmission equipped with revolving speed in one end of the axis 7-2 with flabellum, transmission is amplified by revolving speed and carries out speed
Degree amplification, further enhances induction current intensity, improves measurement sensitivity.
Theoretical foundation of the invention is：
By fluid continuity equation, Bernoulli equation and Throttle Principle it is found that when fluid flows through standard throttle apparatus,
Pressure difference is generated before and after it, this pressure difference and flow it is square directly proportional.Therefore in hydraulic and pneumatic, under volume flow is available
Formula calculates：
(1)
In above formula,CFor discharge coefficient,AFor passage section area,For pressure difference,For the density of fluid.
Meanwhile flow can also be according to passage section area, fluid flow rate and throughput time calculating, i.e. following formula：
(2)
In above formula,vFor fluid flow rate,tFor throughput time.
Induced current produced by coil cutting magnetic lineiSize can be calculated with following formula：
(3)
In above formula, eFor induced electromotive force,NFor coil turn,BFor magnetic field magnetic induction intensity,SFor area coil,For
Coil angular velocity of rotation,tFor the time,RFor coil resistance.
By（1）Formula, the density of gas is far smaller than the density of liquid, therefore passes through spool and valve body with the fluid of uniform pressure
Between gap, the volume flow of gas is far longer than the volume flow of hydraulic oil.This is one of theoretical foundation of the invention.
By（2）Formula, cross-sectional flow area and throughput time are certain, and flow changes with the linear direct ratio of fluid flow rate.This is this
The two of the theoretical foundation of invention.
Again by（1）Formula, if fluid density and pressure difference and discharge coefficient are certain, flow is with cross-sectional flow area also linear direct ratio
Variation.This is the three of theoretical foundation of the invention.
By（3）Formula, it is known that induced current is directly proportional to the angular velocity of rotation of coil, and coil revolving speed is faster, and induced current is got over
Greatly.This is the four of theoretical foundation of the invention.
Citing, taking hydraulic valve 8 to be measured is three-position four-way valve, and spool 8-1, valve body 8-2 illustrate that the principle of the invention is as follows：
Tested hydraulic valve is accessed into test loop, is passed through pressed gas instead of pressure oil.By foundation one, loop gas flow
It is big when than using pressure oil to measure, play the role of Flow amplification.
It for being tested hydraulic valve, can be embodied on flow velocity by the changes in flow rate according to two, internal leakage gas, therefore measure gas
Change in flow would know that changes in flow rate.As shown in Fig. 1 inventive principle figure, the principle of pneumatic rotary shaft flowmeter 7 is when flow becomes
When change, the revolving speed of the axis 7-2 with flabellum can be made to change, it is this to vary less, as long as but the axis 7-2 generation turn with flabellum
It is dynamic just will drive coil 7-7 that magnet bushing 7-6 is and then rotated, and placed in counterbore due to cutting magnetic line can induced current,
Small rotation speed change is converted into more sensitive curent change, and induced current is followed by digital display electricity by transistor amplifier
On flow table either analog current table, can directly it read, so that it may size that is sensitive and intuitively reading internal leakage.
Accommodation pressure oil of the invention is measured as logical pressed gas measurement, improves flow measurement sensitivity；Realization has manually
Oil dripping is counted or oil dripping is weighed as to directly read registration, substantially increases measurement efficiency；If carrying out logical pressure oil measurement,
Every hydraulic valve must all lead to oil in measurement, the inevitably adhesion hydraulic oil on the internal oil passages of valve after measurement,
It can not quickly clean in short-term, hydraulic oil can also flow out when standing, pollute warehouse floor；And the method for the present invention is used to measure, then can
The above problem is effectively avoided, no hydraulic oil loss has saved the energy, protected environment.
Claims (6)
1. a kind of device for fast detecting of internal leakage of hydraulic valve amount, it is characterised in that：Including by air pump（1）, divide water water filter
（2）, pressure reducing valve（3）, throttle valve（5）And shut-off valve（4）Constitute for air circuit, for being connected to pneumatic rotary shaft flow on air circuit
Meter（7）, pneumatic rotary shaft flowmeter（7）It is mounted on for air circuit and hydraulic valve to be measured（8）Between oil inlet pipe；
The pneumatic rotary shaft flowmeter（7）Including shell（7-1）, shell（7-1）On have one have gas outlet and air inlet
Ventilation cavity, ventilation cavity lower part have a horizontal axocoel, have in horizontal axocoel one can with gas flow and rotate band
The axis of flabellum（7-2）, the axis with flabellum（7-2）Pass through bearing（7-3）, gasket seal（7-4）And bearing (ball) cover（7-5）It is mounted on
In the horizontal axocoel, the axis with flabellum（7-2）One end from shell（7-1）It stretches out and connects magnetic strength current display device, magnetic
Inducing current display device includes in the axis with flabellum（7-2）Shaft end production counterbore, being fixed in counterbore can be with flabellum
Axis（7-2）The magnet bushing of rotation（7-6）, magnet bushing couples with hole inner wall by holding screw, and the outside of shaft end is installed with spiral shell
It is female（7-8）, nut（7-8）On have through-hole, be equipped in the counterbore and magnet bushing（7-6）Cooperation generates faradic line
Circle（7-7）, coil（7-7）Both ends from nut（7-8）Through-hole pass through and be connected to amplifying circuit（7-9）, amplifying circuit（7-
9）Connect the ammeter for showing induction current intensity（7-10）.
2. the device for fast detecting of internal leakage of hydraulic valve amount according to claim 1, it is characterised in that：It is described with flabellum
Axis（7-2）One end from shell（7-1）It stretches out and transmission is amplified by revolving speed and be connected with shaft（7-11）, the magnetic strength electric current
Display device, which replaces with, is mounted on shaft（7-11）On, magnetic strength current display device, which replaces with, is included in shaft（7-11）Shaft end
The counterbore of production, being fixed in counterbore can be with shaft（7-11）The magnet bushing of rotation（7-6）, magnet bushing is with hole inner wall by tight
Determine screw attachment, the outside of shaft end is installed with nut（7-8）, nut（7-8）On have through-hole, be equipped in the counterbore and magnet
Bushing（7-6）Cooperation generates faradic coil（7-7）, coil（7-7）Both ends from nut（7-8）Through-hole pass through and connect
It is connected to amplifying circuit（7-9）, amplifying circuit（7-9）Connect the ammeter for showing induction current intensity（7-10）.
3. the device for fast detecting of internal leakage of hydraulic valve amount according to claim 2, it is characterised in that：The revolving speed amplification
Transmission is V belt translation pair（7-12）, V belt translation pair（7-12）Including big belt wheel, transmission belt and small pulley, big belt wheel passes through belt wheel
Axial end cap（7-13）The axis with flabellum is fixed on holding screw（7-2）On.
4. the device for fast detecting of internal leakage of hydraulic valve amount according to claim 1 or 2, it is characterised in that：The electricity
Flow table（7-10）It is digital display ammeter or simulation table.
5. a kind of quick accurate detecting method of the internal leakage of hydraulic valve amount using claim 1 described device, it is characterised in that：
Include the following steps,
The first step, measuring device calibration：
Testing principle is：Measure loop generates air-flow, and the changes in flow rate of internal leakage gas can be embodied on flow velocity, measures gas stream
Speed variation would know that changes in flow rate, when changes in flow rate, can make the axis with flabellum（7-2）Revolving speed change, it is different to turn
The variation of speed can generate the induced current of varying strength in magnetic strength current display device, pass through ammeter（7-10）Instruction energy
The intuitive size for reading internal leakage；
It chooses or pre- one internal leakage of hydraulic valve of production is the minimum internal leakage calibrating valve W of permissionaWith the maximum internal leakage of a permission
Measure calibrating valve Wb, first will be for the gentle turn shaft type flowmeter of air circuit（7）It installs to form measure loop, by pneumatic rotary shaft flow
Meter（7）It is connected to WaOil inlet P on, oil outlet T is emptied in gas, remaining mouth block, adjust for air circuit pressure reducing valve（3）, cut
Only valve（4）And throttle valve（5）, make the pneumatic rotary shaft flowmeter（7）Ammeter（7-10）There is registration, writes down registration at this time
IaTo determine Va；It will test circuit again and be connected to WbOn, write down WbRegistration IbTo determine Vb, Vb-VaRange be hydraulic valve to be measured in
The acceptability limit of leakage rate；
Second step, measurement：
Get out batch testing air inlet pipe（9）, batch testing air inlet pipe（9）With a test interface（9-1）With it is multiple with batch
Measure examination air inlet pipe（9）The hydraulic valve to be measured connected（8）, each hydraulic valve to be measured（8）A corresponding shut-off valve,
After the completion of the calibration of upper step, it will test circuit and be connected to test interface（9-1）, sequentially open multiple hydraulic valves to be measured（8）'s
Shut-off valve measures the internal leakage of this group of hydraulic valve, if test result is in Vb-VaIn the range of then for qualification, go beyond the scope then
To be unqualified, i.e. ammeter（7-10）Registration I in IaAnd IbBetween be it is qualified, it is on the contrary then unqualified；Next group of replacement is surveyed.
6. the quick accurate detecting method of the internal leakage of hydraulic valve amount of device according to claim 5, it is characterised in that：Institute
State the axis with flabellum（7-2）One end equipped with revolving speed amplify transmission, revolving speed amplification transmission be connected with shaft（7-11）, described
Magnetic strength current display device, which replaces with, is mounted on shaft（7-11）On, magnetic strength current display device, which replaces with, is included in shaft（7-
11）Shaft end production counterbore, being fixed in counterbore can be with shaft（7-11）The magnet bushing of rotation（7-6）, magnet bushing with
Hole inner wall is coupled by holding screw, and the outside of shaft end is installed with nut（7-8）, nut（7-8）On have a through-hole, peace in the counterbore
Equipped with magnet bushing（7-6）Cooperation generates faradic coil（7-7）, coil（7-7）Both ends from nut（7-8）It is logical
Hole passes through and is connected to amplifying circuit（7-9）, amplifying circuit（7-9）Connect the ammeter for showing induction current intensity（7-
10）,
Amplify transmission by revolving speed and carry out speed amplification, further enhance induction current intensity, improves measurement sensitivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710189667.4A CN106837933B (en) | 2017-03-27 | 2017-03-27 | A kind of quick accurate detecting method and device of internal leakage of hydraulic valve amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710189667.4A CN106837933B (en) | 2017-03-27 | 2017-03-27 | A kind of quick accurate detecting method and device of internal leakage of hydraulic valve amount |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106837933A CN106837933A (en) | 2017-06-13 |
| CN106837933B true CN106837933B (en) | 2018-11-30 |
Family
ID=59129662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710189667.4A Active CN106837933B (en) | 2017-03-27 | 2017-03-27 | A kind of quick accurate detecting method and device of internal leakage of hydraulic valve amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106837933B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006017A (en) * | 2018-01-02 | 2018-05-08 | 攀钢集团攀枝花钢钒有限公司 | Hot continuous rolling skin pass mill group hydraulic station real-time level tracking and controlling method |
| CN112855641B (en) * | 2019-11-12 | 2023-01-03 | 上海朝田实业股份有限公司 | Automatic hydraulic valve |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4903529A (en) * | 1988-10-07 | 1990-02-27 | Westinghouse Electric Corp. | Valve system analyzer |
| DE4241199C1 (en) * | 1992-12-08 | 1993-11-25 | Schmidt & Co Gmbh Kranz | Hydraulic fluid circulation system for hydraulic testing of hoses and other components - has connecting pipes for test components fitted with temp. converters and controllable heating elements |
| CN202040152U (en) * | 2011-05-20 | 2011-11-16 | 长沙理工大学 | Fault detection system of hydraulic system |
| CN202483989U (en) * | 2011-12-02 | 2012-10-10 | 浙江大学 | Internal leakage rate detection device for hydraulic valve |
| CN102865271A (en) * | 2012-09-28 | 2013-01-09 | 天津鼎成高新技术产业有限公司 | Detection method and device of internal leakage of hydraulic valve |
| CN104454784A (en) * | 2013-09-22 | 2015-03-25 | 上海宝钢工业技术服务有限公司 | Testing system and method of pulse width modulation high-speed response valve |
| CN204371833U (en) * | 2014-12-04 | 2015-06-03 | 哈尔滨通用液压机械制造有限公司 | A kind of with flow and manometric hydraulic oil pipe |
| CN204592410U (en) * | 2015-03-27 | 2015-08-26 | 浙江工业大学 | For high speed rotary valve and the flow parameter real-time detection apparatus of visual inspection |
| CN204944552U (en) * | 2015-08-26 | 2016-01-06 | 北京云网天成科技有限公司 | A kind of multi-functional flow sensor |
| CN206608402U (en) * | 2017-03-27 | 2017-11-03 | 徐州工程学院 | The quick accurate detection device of internal leakage of hydraulic valve amount |
-
2017
- 2017-03-27 CN CN201710189667.4A patent/CN106837933B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106837933A (en) | 2017-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209014432U (en) | A kind of compensation ventilation rate master bar calibrating installation | |
| CN106678056B (en) | A kind of general-purpose centrifugal pump choma testing stand | |
| CN106837933B (en) | A kind of quick accurate detecting method and device of internal leakage of hydraulic valve amount | |
| CN206608402U (en) | The quick accurate detection device of internal leakage of hydraulic valve amount | |
| CN104034377B (en) | Air compressor flow measurement device and calibration system and method thereof | |
| CN104389802B (en) | A kind of turbocharger use for laboratory is calmed the anger generator terminal leakage detection device | |
| CN204718924U (en) | A kind of rotary viscosimeter detects meter high/low temperature pick-up unit | |
| CN109085111A (en) | A kind of active dual Piston ventilation rate master bar calibrating installation and its calibration method | |
| CN202326152U (en) | Axial force measuring device for magnetic pump under instantaneous high temperature difference environment | |
| CN218955833U (en) | Range self-switching flowmeter | |
| CN2745059Y (en) | Four-way three-step servo valve core and valve pocket detecting device | |
| CN206609576U (en) | A kind of internal leakage of hydraulic valve amount efficient detection instrument | |
| CN204421970U (en) | A kind of low discharge turbo flow meter | |
| CN107607453B (en) | Device and method for measuring permeability of annular porous material | |
| CN103674124A (en) | Gear type flow direction flow transmitter | |
| CN107702950B (en) | Working method of iodine sampler | |
| CN203177899U (en) | Novel turbine flowmeter | |
| CN203011497U (en) | Multi-piston array type gas flow calibration device | |
| CN206960290U (en) | The online rheological analysis device of polymer solution high pressure | |
| CN207395827U (en) | Insert type flow measuring device | |
| CN209014433U (en) | A kind of active dual Piston ventilation rate master bar calibrating installation | |
| CN202676412U (en) | Shut-off valve leakage rate on-line detection device | |
| CN206378230U (en) | A kind of low-speed big electric eddy current dynamometer of direct water-cooling | |
| CN204831436U (en) | Rotatory detection device of diaphragm type gas table core | |
| CN108051350A (en) | A kind of porous material testing permeability device and test method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191218 Address after: 310000, No. 3089, Sau Sau Road, Xintang street, Xiaoshan District, Zhejiang, Hangzhou Patentee after: Hangzhou lever hydraulic technology Co., Ltd. Address before: 221000 Lishui Road, Xincheng District, Jiangsu, Xuzhou Patentee before: Xuzhou institute of technology |