CN101893019B - Hydraulic test system and hydraulic test method - Google Patents

Abstract

The invention discloses a hydraulic test system and a hydraulic test method, relating to a hydraulic system which is capable of walking and utilizes an engine as a power source. The hydraulic test system disclosed in the invention is composed of a box, an oil tube joint A, a pressure sensor, a temperature sensor, a flow sensor, a data acquisition calculator, an engine rotating speed input interface and an oil tube joint B, wherein the oil tube joint A, the pressure sensor, the temperature sensor, the flow sensor, the data acquisition calculator, the engine rotating speed input interface and the oil tube joint B are installed in the box. In the invention, the hydraulic test system and a tested device form a serial loop, and the plot ratio formula in a data acquisition unit is adopted to determine the performance of the tested device. The power source of the tested device is used for testing the tested device, thus realizing the beneficial effects of convenience and rapidness, reduction of labor intensity, improvement of efficiency and convenient maintenance for the tested device.

Description

Hydraulic test system and hydraulic test method

Technical field

The present invention relates to hydraulic test system and hydraulic test method, especially a kind of is the hydraulic test system of walking and the hydraulic test method of power source with the motor.

Background technique

With motors such as internal combustion engines is that the hydraulic system of the engineering machinery of walking, vehicle, the farm machinery of power source is when breaking down; Because its hydraulic system is made up of hydraulic-pressure pump and other executive component (like hydraulic jack, oil hydraulic motor, hydraulic traversing mechanism), so trouble location is difficult to confirm.If maintenance then generally will be adopted elimination process one by one, promptly pull down one by one and suspect the parts break down, change newly, and to test one by one, or the detection facility of a component transfer of pulling down to specialty.Such repair density is very big, and efficient is also low.Simultaneously, owing to only remove to get rid of each parts, therefore in daily maintenance, be difficult to the fault of finding that it is hidden at the Shi Caihui that breaks down.Perhaps; In existing technology, also there is a kind of portable liquid pressure tester; But this test system is to utilize battery or power supply to be power source, needs standby power supply when equipment under test is tested, but this series products can only be measured monotechnics characteristic (like pressure, flow).And use inconvenience, the test to element simultaneously also has narrow limitation and the standard that does not meet national industry test.Therefore, be necessary to design a kind of convenient and swift, need not to dismantle unit under test and be that standard can meet the test system that national sector standard is surveyed with the national sector standard.

Summary of the invention

The purpose of this invention is to provide a kind of convenient and swift, hydraulic test system and hydraulic test method thereof of need not to dismantle unit under test, the power of equipment under test capable of using own.

A kind of hydraulic test system comprises the flow transducer and the temperature transducer that are installed in the casing, and oil also is installed in the casing

Pipe joint A, pressure transducer, data capture calculator, engine speed input interface and oil connection B; Oil connection A (4), one-way valve (5), flow transducer (7), shutoff valve (8) and oil connection B (13) form the polyphone circuit; Shutoff valve (8) is parallelly connected with relief valve (6); The engine speed input interface links to each other with the data capture calculator respectively with flow transducer, temperature transducer and the pressure transducer of polyphone on the circuit; The engine speed input interface links to each other with the engine speed output interface, and oil connection A links to each other with the oil pump of equipment under test, and oil connection B links to each other with the executive component of equipment under test.

The engine speed output interface of the equipment under test that links to each other with hydraulic test system of the present invention links to each other with engine rotation speed sensor, and engine rotation speed sensor links to each other with motor.

The power source of hydraulic test system of the present invention is the power source in the equipment under test.

In the hydraulic test system of the present invention the detected data of data capture calculator be sensor output like data such as electric current, voltage, pulse, frequencies.

Also have another technological scheme among the present invention, utilize the hydraulic test method of a last technological scheme hydraulic test system, may further comprise the steps:

(1) input volumetric efficiency formula in the data capture calculator (11) ${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">Q</figure-callout>}2\&times;V2}{Q1\&times;V1}\&times;100\%$

${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">P</figure-callout>}2\&times;V2}{P1\&times;V1}\&times;100\%.$

(2) adopt hydraulic test system, engine speed input interface (12) links to each other with engine speed output interface (14), and oil connection A (4) links to each other with the dynamical element of equipment under test, and oil connection B (13) links to each other with the executive component of equipment under test.

(3) pass through control unit; Regulate pressure and/or temperature; Equipment under test is detected, note flow Q, rotating speed V or pressure P, calculate the volumetric efficiency η of equipment under test through data capture calculator (11); Contrast contrasts the plot ratio η value that requires in the NBS then then, judges this pump performance.

Can also comprise the steps:

(1) input volumetric efficiency formula in the data capture calculator (11) ${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">Q</figure-callout>}2\&times;V2}{Q1\&times;V1}\&times;100\%$ With

${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">P</figure-callout>}2\&times;V4}{P1\&times;V3}\&times;100\%.$

(2) adopt hydraulic test system, engine speed input interface (12) links to each other with engine speed output interface (14), and oil connection A (4) links to each other with the oil pump of equipment under test, and oil connection B (13) links to each other with the executive component of equipment under test.

(3) oil pump test

Adopt hydraulic test system; Regulate relief valve 6 to the pressure maximum that is connected oil pump, unclamp shutoff valve 8, ato unit; Data capture calculator 11 through temperature transducer 9 collect temperature reach the probe temperature of national sector standard regulation after; Data capture calculator 11 is gathered through flow transducer 7 and engine rotation speed sensor 15 and is noted current flow Q1 and rotating speed V1, regulates shutoff valve 8 again to the fixed parameter of tested oil pump Nameplate lable, according to the force value of national sector standard performance test standard; Data capture calculator 11 is noted current flow Q2 and the rotating speed V2 that depresses that add, and inner through the volumetric efficiency formula at data capture calculator 11 ${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">Q</figure-callout>}2\&times;V2}{Q1\&times;V1}\&times;100\%,$ Calculate the volumetric efficiency of this pump, contrast the plot ratio value that requires in the NBS then, judge this pump performance.

Can also comprise the steps:

(1) input volumetric efficiency formula in the data capture calculator (11) ${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">Q</figure-callout>}2\&times;V2}{Q1\&times;V1}\&times;100\%$ With

${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">P</figure-callout>}2\&times;V4}{P1\&times;V3}\&times;100\%.$

(2) adopt hydraulic test system, engine speed input interface (12) links to each other with engine speed output interface (14), and oil connection A (4) links to each other with the oil pump of equipment under test, and oil connection B (13) links to each other with the executive component of equipment under test.

(3) executive component test

Adopt hydraulic test system, be totally released shutoff valve 8, ato unit; Regulate the pressure maximum of relief valve 6 to tested oil pump, regulate shutoff valve 8 to pressure maximum, data capture calculator 11 is noted current pressure P 1 and rotating speed V3; Be totally released out shutoff valve 8 then; Then let executive component carry out specified load operation, data capture calculator 11 is noted pressure P 2 and the V4 under preload, and data capture calculator 11 is according to the volumetric efficiency formula ${\mathrm{\&eta;}}_v=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">P</figure-callout>}2\&times;V4}{P1\&times;V3}\&times;100\%,$ Calculate the volumetric efficiency of executive component, contrast the plot ratio value that requires in the NBS then, judge the performance of this executive component.

Owing in application, only need with hydraulic test system of the present invention and equipment to be tested polyphone; Utilize the power of tested system, device itself; Starting equipment under test power can detect; Detect the beneficial effect that therefore, that the present invention has is convenient and swift, reduce labor intensity, raise the efficiency and be convenient to the equipment under test maintenance and need not remove parts.

Description of drawings

The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is the process schematic representation of preferred embodiment of the present invention hydraulic test system test equipment under test.

Among the figure, the oil pump of 1 equipment under test, 2 motors, the executive component of 3 equipment under tests (hydraulic jack, oil hydraulic motor, hydraulic traversing mechanism), 4 oil connection A; 5 one-way valves, 6 relief valves, 7 flow transducers, 8 shutoff valves; 9 temperature transducers, 10 pressure transducers, 11 data capture calculators, 12 engine speed input interfaces; 13 oil connection B, the 14 motors fast output interface of walking around, 15 engine rotation speed sensors, what frame of broken lines was represented is casing.

Embodiment

Disclosed all characteristics in this specification, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.

Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.

Embodiment one: the oil pump test

Fig. 1 is the process schematic representation of hydraulic test system test equipment under test, wherein is that this practicality is new in the wire frame

The type hydraulic test system; Constitute by a casing, oil connection A4, one-way valve 5, relief valve 6, flow transducer 7, shutoff valve 8, temperature transducer 9, pressure transducer 10, data capture calculator 11, engine speed input interface 12 and oil connection B13 are installed in the casing; Oil connection A4, one-way valve 5, flow transducer 7, shutoff valve 8 and oil connection B13 form the polyphone circuit, also are connected with temperature transducer 9 and pressure transducer 10 on the polyphone circuit, and shutoff valve 8 is parallelly connected with relief valve 6; Engine speed input interface 12 links to each other with data capture calculator 11 respectively with flow transducer 7, temperature transducer 9 and the pressure transducer 10 of polyphone on the circuit.

Oil connection B (13) is linked to each other oil pump 1 oil outlet and motor 2 with oil pump 1 oil outlet of equipment under test

Link to each other, motor 2 links to each other with engine rotation speed sensor 15, is connected with engine speed output interface 14 on the engine rotation speed sensor 15, and engine speed output interface 14 links to each other with engine speed input interface 12; Simultaneously oil connection A4 is linked to each other with the executive component 3 of equipment under test, wherein executive component 3 includes hydraulic jack, oil hydraulic motor and hydraulic traversing mechanism.Like this, oil pump 1 oil outlet, executive component 3 form a polyphone loop with oil connection A4, the oil connection B13 of hydraulic test system.

Data capture calculator 11 adopts the single-chip microcomputer signal processing, and the demonstration result is a digital data.

Regulate relief valve 6 to the pressure maximum PMa that is connected oil pump 1 _Max=14MPa; Unclamp shutoff valve 8; Ato unit 2, data rice collection calculator 11 through temperature transducer 9 collect 51 ℃ of temperature (reaching the probe temperature of national sector standard regulation) after, current flow Q1=4L/min and rotating speed V1=1450r/min are gathered and noted to data capture calculator 11 through flow transducer 7 and engine rotation speed sensor 15; Regulate shutoff valve 8 again to the fixed parameter of tested oil pump Nameplate lable, according to the force value 0.5PMa of national sector standard performance test standard _Max=7PMa, data capture calculator 11 note current flow Q2=3.8L/min and the rotating speed V2=1300r/min that depresses that add.And it is inner through the volumetric efficiency formula at data capture calculator 11 ${\mathrm{\&eta;}}_{v1}=\frac{\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">Q</figure-callout>}2\&times;V2}{Q1\&times;V1}\&times;100\%,$ Draw the volumetric efficiency η of this pump _V1=0.85, declare this pump performance in view of the above.Its criterion is from JB/T 7041-1993, and is as shown in the table:

Table one

Check the fixed parameter of tested oil pump Nameplate lable, its nominal discharge capacity is 1.8,1.8＜2, table in the contrast, and 85＞80, so can judge that this measured oil pump performance is stable.

Embodiment two: the executive component test

Equipment under test oil pump 1 is identical among its Placement and the embodiment one.At this moment, be totally released shutoff valve 8, ato unit 2 is regulated the pressure maximum PMa of relief valve 6 to tested oil pump 1 _Max=14MPa; Regulate shutoff valve 8 to pressure maximum, data capture calculator 11 is noted current pressure P 1=12MPa and rotating speed V3=350r/min, is totally released out shutoff valve 8 then; Let then oil hydraulic motor carries out specified load operation in the executive component 3; Promptly under rated pressure=10Mpa, data capture calculator 11 is noted pressure P 2=9Mpa and the V4=280r/min under preload, and data capture calculator 11 is at internal condition volumetric efficiency formula ${\mathrm{\&eta;}}_{\mathrm{<figure-callout\; id="2"\; label="v"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">v</figure-callout>}2}=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="H20091U2465120090520E000011.png"\; state="\{\{state\}\}">P</figure-callout>}2\&times;V4}{P1\&times;V3}\&times;100\%,$ Calculate the volumetric efficiency η of oil hydraulic motor in the executive component 3 _V2=0.6, judge the performance of oil hydraulic motor in this executive component.Its criterion is used the data in embodiment's one table one equally, checks the fixed parameter of tested oil pump Nameplate lable, and its nominal discharge capacity is 1.8; 1.8＜2, table in the contrast, 60＜80; So can judge the unstable properties of oil hydraulic motor in this tested executive component, must be to be out of order.Just can only detect to oil hydraulic motor this moment.

The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.

Claims (7)

1. hydraulic test system; Comprise casing and the flow transducer (7) and the temperature transducer (9) that are installed in the casing; It is characterized in that; Oil connection A (4), pressure transducer (10), data capture calculator (11), engine speed input interface (12) and oil connection B (13) also are installed in the casing; Oil connection A (4), one-way valve (5), flow transducer (7), shutoff valve (8) and oil connection B (13) form series circuit; Shutoff valve (8) is parallelly connected with relief valve (6), and engine speed input interface (12) links to each other with data capture calculator (11) respectively with flow transducer (7), temperature transducer (9) and pressure transducer (10) on the series circuit, and engine speed input interface (12) links to each other with engine speed output interface (14); Oil connection A (4) links to each other with the oil pump of equipment under test, and oil connection B (13) links to each other with the executive component of equipment under test.

2. hydraulic test system according to claim 1 is characterized in that, engine speed output interface (14) links to each other with engine rotation speed sensor (15) in the said equipment under test, and engine rotation speed sensor (15) links to each other with motor.

3. hydraulic test system according to claim 1 and 2 is characterized in that, the power source of hydraulic test system is the power source in the equipment under test.

4. hydraulic test system according to claim 1 is characterized in that, the detected data of said data capture calculator (11) are electric current, voltage, pulse, frequency data.

5. hydraulic test method that utilizes the described hydraulic test system of claim 1; It is characterized in that, may further comprise the steps: input volumetric efficiency formula

and

in (1) data capture calculator (11);

(2) adopt hydraulic test system, engine speed input interface (12) links to each other with engine speed output interface (14), and oil connection A (4) links to each other with the dynamical element of equipment under test, and oil connection B (13) links to each other with the executive component of equipment under test;

(3) pass through control unit; Regulate pressure and/or temperature; Equipment under test is detected, note rotating speed V, flow Q and pressure P, calculate the volumetric efficiency η v of equipment under test through data capture calculator (11); Contrast the plot ratio η v value that requires in the NBS then, judge this pump performance.

6. a hydraulic test method that utilizes the described hydraulic test system of claim 1 is characterized in that, may further comprise the steps:

(1) data capture calculator; (11) input volumetric efficiency formula

and

in;

(2) adopt hydraulic test system, engine speed input interface (12) links to each other with engine speed output interface (14), and oil connection A (4) links to each other with the oil pump of equipment under test, and oil connection B (13) links to each other with the executive component of equipment under test;

(3) oil pump test

Adopt hydraulic test system; Regulate relief valve (6) to the pressure maximum that is connected oil pump; Unclamp shutoff valve (8); Ato unit; After the temperature that data capture calculator (11) collects through temperature transducer (9) reached the probe temperature of national sector standard regulation, current flow Q1 and rotating speed V1 are gathered and noted to data capture calculator (11) through flow transducer (7) and engine rotation speed sensor (15), regulates shutoff valve (8) again to the fixed parameter of tested oil pump Nameplate lable; Force value according to national sector standard performance test standard; Data capture calculator (11) is noted current flow Q2 and the rotating speed V2 that depresses that add, and inner through volumetric efficiency formula

at data capture calculator (11), calculates the volumetric efficiency of this pump; Contrast the plot ratio value that requires in the NBS then, judge this pump performance.

7. a hydraulic test method that utilizes the described hydraulic test system of claim 1 is characterized in that, may further comprise the steps:

(1) data capture calculator; (11) input volumetric efficiency formula

and

in;

(2) adopt hydraulic test system, engine speed input interface (12) links to each other with engine speed output interface (14), and oil connection A (4) links to each other with the oil pump of equipment under test, and oil connection B (13) links to each other with the executive component of equipment under test;

(3) executive component test

Adopt hydraulic test system; Be totally released shutoff valve (8); Ato unit is regulated the pressure maximum of relief valve (6) to tested oil pump, regulates shutoff valve (8) to pressure maximum; Data capture calculator (11) is noted current pressure P 1 and rotating speed V3; Be totally released shutoff valve (8) then, then let executive component carry out specified load operation, data capture calculator (11) is noted pressure P 2 and the V4 under preload; Data capture calculator (11) is according to volumetric efficiency formula ; Calculate the volumetric efficiency of executive component, contrast the plot ratio value that requires in the NBS then, judge the performance of this executive component.

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