CN103645046A - Method and device for detecting performance test of central rotary joint - Google Patents
Method and device for detecting performance test of central rotary joint Download PDFInfo
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- CN103645046A CN103645046A CN201310732613.XA CN201310732613A CN103645046A CN 103645046 A CN103645046 A CN 103645046A CN 201310732613 A CN201310732613 A CN 201310732613A CN 103645046 A CN103645046 A CN 103645046A
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Abstract
The invention discloses a method for detecting the performance test of a central rotary joint. The method consists of a maximum working pressure test module which comprises the following steps of controlling a hydraulic system to output at a preset maximum working pressure, starting a driving device to drive a rotary member of the central rotary joint to rotate; acquiring the inlet pressure P1 and the outlet pressure P2 of the central rotary joint in real time, thus obtaining the stable judgment result of the maximum working pressure by taking the fact that the inlet pressure P1 and the outlet pressure P2 meet a first formula as a condition, wherein the first formula is as follows: P1-P2 is less than P<p>, in the formula, P<p> is a preset pressure drop threshold. The reliability and stability of the central rotary joint can be obtained through detection on different angles of durability. On that basis, the invention also provides a system for detecting the performance test of the central rotary joint.
Description
Technical field
The present invention relates to the technical field of performance test of Hydraulic Elements, be specifically related to center-rotary joint performance test detection method, device.
Background technology
As everyone knows, the center-rotary joint relatively rotating engineering machinery that is used for greatly getting on and off.For example, excavator, excavator car load is divided into two parts of getting on the bus and get off, and lower vehicle hydraulic system and upper vehicle hydraulic system share a pumping plant, and its required fluid need to certainly be got on the bus and connect by pipeline; Between the housing of center-rotary joint and mandrel, can relatively rotate, thereby can guarantee that necessary connecting line does not produce any torsion, meet the function needs that the hydraulic system that gets on and off shares a pumping plant.
Obviously, for the relatively rotating hydraulic control engineering machinery that gets on and off, as the center-rotary joint of core component, all kinds of parameter requests of its reliability and stability and reactor product performance are particularly important.Separate between the inner different oil ducts of center-rotary joint, except the manufacturing accuracy of housing parts and mandrel part, the course of work is rotated the reasons such as wearing and tearing affects its usability equally, and therefore, durability experiment is indispensable.In addition, key parameter when torsional moment during running is swivel coupling design, the real-time measurement of moment is very important equally.
For the endurancing of center-rotary joint, different production firms have proposed corresponding solution.Be subject to the restriction of himself structure, prior art only can be determined sealing, the intensity of temperature on part under the impact of driving torque and pressure-acting of swivel coupling mostly, practical manifestation in long time running process, cannot carry out thoroughly evaluating to center-rotary joint.Therefore, there is limitation.
In view of this, the performance test technology urgently looking for another way for existing center-rotary joint is optimized design, carries out permanance detection, for guaranteeing that its functional reliability and stability provide reliable guarantee with the angle from different.
Summary of the invention
For above-mentioned defect, the technical matters that the present invention solves is, provides a kind of for center-rotary joint performance test detection method, and the permanance by different angles detects, and obtains the reliability and stability of center-rotary joint.On this basis, the present invention also provides a kind of center-rotary joint performance test detection system simultaneously.
Center-rotary joint performance test detection method provided by the invention, comprises maximum working pressure (MWP) tentative module, and described maximum working pressure (MWP) tentative module comprises the following steps:
Control hydraulic system and export with predetermined maximum working pressure (MWP), start drive unit and drive the rotating member of center-rotary joint to rotate;
The intake pressure P of center-rotary joint described in Real-time Obtaining
1with top hole pressure P
2;
With described intake pressure P
1with top hole pressure P
2meeting the first formula is condition, obtains the stable judged result of maximum working pressure (MWP); Described the first formula is as follows:
P
1-P
2<P
p, in formula, P
pfor default pressure drop threshold value.
Preferably, described default pressure drop threshold value P
pfor 0.05MPa-0.2MPa.
Preferably, also comprise rated flow tentative module, described rated flow tentative module comprises the following steps:
Control hydraulic system with predetermined rated Output pressure, start drive unit and drive the rotating member of center-rotary joint to rotate;
The inlet flow rate Q of center-rotary joint described in Real-time Obtaining
1with rate of discharge Q
2;
With described inlet flow rate Q
1with rate of discharge Q
2meeting the second formula is condition, obtains the stable judged result of rated flow; Described the second formula is as follows:
│ [(Q
1+ Q
2)/2-Q]/Q │ <Q
p, in formula, Q is rated flow, Q
pfor preset flow compares threshold value.
Preferably, described preset flow is than threshold value Q
pfor 1%-2%.
Preferably, also comprise the test of steering resistance square, described steering resistance square test comprises the following steps:
Control hydraulic system and export with predetermined maximum working pressure (MWP), start drive unit and drive the rotating member of center-rotary joint to rotate;
The moment T of center-rotary joint described in Real-time Obtaining;
It is condition that the described moment T of take meets the 3rd formula, obtains the stable judged result of steering resistance square; Described the 3rd formula is as follows:
T<T
p; Wherein, T
pfor default torque threshold.
Preferably, described drive unit drives the rotating member of center-rotary joint to rotate and reverse each schedule time length.
Preferably, described schedule time length is 2min-4min.
Center-rotary joint performance test detection system provided by the invention, comprising:
Drive unit, for driving the rotating member of described center-rotary joint to rotate;
Hydraulic system, for setting up the test loop of described center-rotary joint;
Inlet oil temperature sensor, is arranged on the oil-feed branch road of described center-rotary joint; With
Torque speed sensor, is arranged between described center-rotary joint and the output terminal of described drive unit; Also comprise:
Inlet pressure sensor, is arranged on the oil-feed branch road of described center-rotary joint;
Outlet pressure sensor, is arranged on the fuel-displaced branch road of described center-rotary joint; With
Controller, in hydraulic system, with predetermined maximum working pressure (MWP), export, under the state that the rotating member of drive unit drive center-rotary joint rotates, described controller receives the intake pressure P1 of described inlet pressure sensor Real-time Collection and the top hole pressure P2 of described outlet pressure sensor Real-time Collection, and with described intake pressure P
1with top hole pressure P
2meeting the first formula is condition, obtains the stable judged result of maximum working pressure (MWP); Described the first formula is as follows:
P
1-P
2<P
p, in formula, P
pfor default pressure drop threshold value.
Preferably, also comprise:
Inlet flow rate sensor, is arranged on the oil-feed branch road of described center-rotary joint; With
Outlet flow sensor, is arranged on the fuel-displaced branch road of described center-rotary joint;
In hydraulic system, with predetermined rated Output pressure, under the state that the rotating member of drive unit drive center-rotary joint rotates, described controller also receives the inlet flow rate Q of described inlet flow rate sensor Real-time Collection
1rate of discharge Q with described outlet flow sensor Real-time Collection
2, and with described inlet flow rate Q
1with rate of discharge Q
2meeting the second formula is condition, obtains the stable judged result of rated flow; Described the second formula is as follows:
│ [(Q
1+ Q
2)/2-Q]/Q │ <Q
p, in formula, Q is rated flow, Q
pfor preset flow compares threshold value.
Preferably, in hydraulic system, with predetermined maximum working pressure (MWP), export, under the state that the rotating member of drive unit drive center-rotary joint rotates, described controller also receives the moment of described torque speed sensor Real-time Collection, and take described moment T, to meet the 3rd formula be condition, obtains the stable judged result of steering resistance square; Described the 3rd formula is as follows:
T<T
p; Wherein, T
pfor default torque threshold.
Preferably, described controller is industrial computer, by the data message of data collecting instrument receiving sensor Real-time Obtaining, and can show judged result by diagrammatic form.
Preferably, also comprise selector switch, and be configured to: the manual mode that automatically carries out the automatic mode of each test and manually carry out each test.
Preferably, also comprise swivel coupling frock, this frock comprises:
Supporting disk, is arranged on fixed rack by bearing, and for being fixedly connected with the rotating member of center-rotary joint to be measured, and the output terminal of described drive unit and the lower end of described supporting disk are in transmission connection;
Pull-fork assembly, is arranged on described fixed rack, for being fixedly connected with the non-rotating member of center-rotary joint to be measured; With
Side is carried bringing device, for applying lateral action power in the non-rotating member of center-rotary joint to be measured.
Preferably, described pull-fork assembly comprises:
Column, is fixedly installed on the described fixed rack of described supporting disk side; With
Shift fork, one end and described column-type are spacing circumferentially, and the other end is for being fixedly connected with the non-rotating member of center-rotary joint to be measured; And
Described side is carried bringing device and is arranged on described column.
Preferably, described side is carried bringing device and is comprised:
Elastomeric element, is fixedly installed on described column, and the described elastomeric element under trystate has precompressed deformation; With
Pushing block, is fixedly connected with the external part of described elastomeric element.
Based on existing center-rotary joint performance test detection method, this method has additional maximum working pressure (MWP) tentative module, particularly, controlling hydraulic system exports with predetermined maximum working pressure (MWP), along with driving center-rotary joint simulated condition, drive unit rotates, the intake pressure of Real-time Obtaining center-rotary joint and top hole pressure, and judge whether inlet outlet pressure differential is less than default pressure drop threshold value, if determine the work that this center-rotary joint can be reliable and stable under maximum working pressure (MWP).So arrange, on the basis of pilot project in the past, carried out the expansion of maximum working pressure (MWP) test, can more fully carry out the endurancing of center-rotary joint, and then from different angles, carry out the performance test of center-rotary joint, guarantee to greatest extent its functional reliability, stability.
In preferred version of the present invention, can also set up rated flow tentative module, particularly, control hydraulic system with predetermined rated Output pressure, along with driving center-rotary joint simulated condition, drive unit rotates the inlet flow rate Q of Real-time Obtaining center-rotary joint
1with rate of discharge Q
2, and whether satisfied the second formula of judgement import and export flow, if determine that the rated flow of this center-rotary joint is reliable and stable; Wherein, the second formula is as follows: │ [(Q
1+ Q
2)/2-Q]/Q │ <Q
p, in formula, Q is rated flow, Q
pfor preset flow compares threshold value.Further preferably, can also set up steering resistance square tentative module, particularly, controlling hydraulic system exports with predetermined maximum working pressure (MWP), along with driving center-rotary joint simulated condition, drive unit rotates, the moment T of Real-time Obtaining center-rotary joint, and judge whether this moment is less than default torque threshold, if determine that the steering resistance square of this swivel coupling is reliable and stable.Thus, can further comprehensively carry out the endurancing of center-rotary joint, its pilot project covers wider; Meanwhile, rated flow tentative module and steering resistance square tentative module adopt the parameter of Real-time Obtaining, judge more accurate reliable.
In another preferred version of the present invention, adopt one to there is the frock that side is carried bringing device, can apply lateral action power in the non-rotating member of center-rotary joint to be measured, simplation examination side is carried the impact on its serviceability, can further improve accuracy of detection.
Accompanying drawing explanation
Fig. 1 is center-rotary joint performance test detection system one-piece construction schematic diagram described in present embodiment;
Fig. 2 is that the practical set of this swivel coupling frock is related to schematic diagram;
Fig. 3 is the assembly relation schematic diagram that pull-fork assembly shown in Fig. 2 and side are carried bringing device;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 shows the block scheme of maximum working pressure (MWP) tentative module described in present embodiment;
Fig. 6 shows the block scheme of rated flow tentative module described in present embodiment;
Fig. 7 shows the block scheme of steering resistance square test described in present embodiment.
In figure:
Embodiment
Core of the present invention is to provide a kind of and detects with the permanance by different angles for center-rotary joint performance test detection method, obtains the reliability and stability of center-rotary joint.Below in conjunction with specific embodiment and Figure of description, technical scheme provided by the invention is further detailed.
Refer to Fig. 1, this figure is center-rotary joint performance test detection system one-piece construction schematic diagram described in present embodiment.
This center-rotary joint performance test detection system comprises motor 1, hydraulic system 2, inlet oil temperature sensor 3 and torque speed sensor 4.Wherein, hydraulic system 2, for setting up the test loop of center-rotary joint 5 to be measured, specifically can adopt existing techniques in realizing, repeats no more herein; Inlet oil temperature sensor 3 is arranged on the oil-feed branch road of center-rotary joint 5 to be measured, gathers inlet oil temperature; Torque speed sensor 4 is arranged between center-rotary joint 5 to be measured and the output terminal of motor 1, gathers torque value.Wherein, motor 1, for driving the rotating member (housing parts) of center-rotary joint 5 to be measured to rotate, as the drive unit that original driving force is provided, specifically can be realized transmission of power by reductor 6 and spring coupling 7.Obviously, the selection of drive unit is not limited to the motor 1 shown in figure, and here, drive unit 1 can also adopt hydraulic pump, as long as meet, provides the function needs of original driving force all can.
In addition, this system also comprises and is arranged on the inlet pressure sensor 8 of center-rotary joint 5 oil-feed branch roads, the outlet pressure sensor 9 that is arranged on center-rotary joint 5 fuel-displaced branch roads and controller 10.In hydraulic system 2, with predetermined maximum working pressure (MWP), export, under the state that the rotating member of motor 1 drive center-rotary joint 5 rotates, this controller 10 receives the intake pressure P of inlet pressure sensor 8 Real-time Collections
1top hole pressure P with outlet pressure sensor 9 Real-time Collections
2, and with intake pressure P
1with top hole pressure P
2meeting the first formula is condition, obtains the stable judged result of maximum working pressure (MWP); Described the first formula is: P
1-P
2<P
p, in formula, P
pfor default pressure drop threshold value.
Except maximum working pressure (MWP) output test, can also carry out rated flow test.Further as shown in the figure, this system also comprises the inlet flow rate sensor 11 being arranged on center-rotary joint 5 oil-feed branch roads to be measured, to detect oil-feed flow; Meanwhile, on the fuel-displaced branch road of center-rotary joint 5 to be measured, outlet flow sensor 12 is set; In hydraulic system 2, with predetermined rated Output pressure, under the state that the rotating member of motor 1 drive center-rotary joint 5 rotates, controller 10 also receives the inlet flow rate Q of inlet flow rate sensor 11 Real-time Collections
1rate of discharge Q with outlet flow sensor 12 Real-time Collections
2, and with inlet flow rate Q
1with rate of discharge Q
2meeting the second formula is condition, obtains the stable judged result of rated flow; Described the second formula is: │ [(Q
1+ Q
2)/2-Q]/Q │ <Q
p, in formula, Q is rated flow, Q
pfor preset flow compares threshold value.
In addition, in hydraulic system, with predetermined maximum working pressure (MWP), export, under the state that the rotating member of motor 1 drive center-rotary joint 5 rotates, controller 10 also receives the moment of torque speed sensor 4 Real-time Collections, and take described moment T, to meet the 3rd formula be condition, obtains the stable judged result of steering resistance square; Described the 3rd formula is: T<T
p; Wherein, T
pfor default torque threshold.
In order better to realize the Treatment Analysis of the real-time measurement of various performance parameters and image, chart, this controller 10 can be adopted as industrial computer, by the data message of data collecting instrument 19 receiving sensor Real-time Obtainings, and can show judged result by diagrammatic form.Simultaneously, selector switch (not shown) can also be set, and be configured to: the manual mode that automatically carries out the automatic mode of each test and manually carry out each test, that is to say, when selector switch is during in manual gear, system is carried out every test procedure according to manual command, and when selector switch is during in automatic gear, system is carried out the step of every test automatically.More convenient to operate, more practical.
In process of the test, except setting up simulated pressure oil circuit, need simulation to rotarily actuate operation simultaneously.Here, rotarily actuate the reliability operating and directly have influence on the precision that test detects.Based on this, can do further to optimize for the frock of swivel coupling to be measured.Please also refer to Fig. 2, this figure is that the practical set of this swivel coupling frock is related to schematic diagram.
Center-rotary joint 5 to be measured is arranged at fixed rack 13 by frock.This frock mainly comprises that supporting disk 14, pull-fork assembly 15 and side carry bringing device 16.Wherein, supporting disk 14 is arranged on fixed rack 13 by bearing, thereby be fixedly connected with the rotating member of center-rotary joint 5 to be measured, can adopt auxiliary stand 20 to be fixedly connected with supporting disk 14 bolts with rotating member respectively, under this state, the lower end of the output terminal of motor 1 and supporting disk 14 is in transmission connection, and can ensure the stability of rotation of center-rotary joint 5 to be measured; Wherein, pull-fork assembly 15 is arranged on fixed rack 13, and for being fixedly connected with the non-rotating member of center-rotary joint 5 to be measured, thereby simulation center-rotary joint turns round duty relatively; Wherein, side is carried bringing device 16 for applying lateral action power in the non-rotating member of center-rotary joint 5 to be measured, can simplation examination side carry the impact on its serviceability thus, can further improve accuracy of detection.
Particularly, the column 151 of pull-fork assembly 15 is fixedly installed on the fixed rack 13 of supporting disk 14 sides; One end of its shift fork 152 and this column 151 form circumferentially spacing, the other end is for being fixedly connected with the non-rotating member of center-rotary joint 5 to be measured, specifically please in the lump in conjunction with Fig. 3 and Fig. 4, wherein, Fig. 3 is the assembly relation schematic diagram that pull-fork assembly shown in Fig. 2 15 and side are carried bringing device 16, the vertical view that Fig. 4 is Fig. 3.This programme has effectively utilized the top practical set threaded hole of center-rotary joint 5, and the other end of shift fork 152 is realized and being fixedly connected with of non-rotating member by bolt; Correspondingly, side is carried bringing device 16 and is arranged on column 151.
It should be noted that, " circumferentially spacing " here refer to, spacing in the circumferential formation of center-rotary joint 5 between shift fork 152 and column 151.
In addition, a screw 17 can be set on supporting disk 14, relative set one approach switch 18 on fixed rack 13, to obtain relevant informations such as rotating the number of turns.
In addition, present embodiment carries for the side of simulation side load a kind of implementation that bringing device 16 provides a kind of reliable in structure, good operability.In conjunction with 2 and Fig. 3 shown in, it is main by the elastomeric element 161 being fixedly installed on column 151 that this side is carried bringing device 16, the pushing block 162 being fixedly connected with external part with elastomeric element 161 forms, and the elastomeric element under trystate has precompressed deformation, by pushing block 162, apply lateral action power on the non-rotating member of center-rotary joint 5 to be measured, preferably adopt nylon material to make pushing block 162, to avoid damaging center-rotary joint 5.Being appreciated that this elastomeric element 161 can make for elastomeric material, can be also Compress Spring shown in figure, as long as meet the function needs that lateral action power can be provided after pressurized deformation, in the scope of all asking for protection in the application.
Certainly, in order further to improve the adaptability of this test detection system, so that can be used in the test of different model center-rotary joint detects, can carry the further optimization of bringing device 16 dos by offside, for example, the direction that applies along side force, one governor motion (not shown) is set between elastomeric element 161 and column 151, thus can be according to the test needs of different center-rotary joints, relative position between adjustable elastic parts 161 and column 151, thereby the precompressed deformation of capable of regulating elastomeric element 161 obtains actual needed side force, thereby closing to reality operating mode more, can meet the use of more specification products.
Obviously, this programme adopts motor vertical structure, adopts the connected mode of motor, torque speed sensor and frock simultaneously, and directly, simply, transmission efficiency is high in connection, and floor area is little.
Except aforementioned center-rotary joint performance test detection system, present embodiment also provides a kind of center-rotary joint performance test detection method, and the method comprises maximum working pressure (MWP) tentative module.Specifically refer to Fig. 5, the figure shows the block scheme of maximum working pressure (MWP) tentative module described in present embodiment.
As shown in Figure 5, this maximum working pressure (MWP) tentative module comprises the following steps:
S51, controls hydraulic system and exports with predetermined maximum working pressure (MWP), starts drive unit and drives the rotating member of center-rotary joint 5 to rotate;
S52, the intake pressure P of Real-time Obtaining center-rotary joint 5
1with top hole pressure P
2;
S53, with intake pressure P
1with top hole pressure P
2meeting the first formula is condition, obtains the stable judged result of maximum working pressure (MWP); Described the first formula is as follows:
P
1-P
2<P
p, in formula, P
pfor default pressure drop threshold value.Preferably, this default pressure drop threshold value P
pfor 0.05MPa-0.2MPa.
For example, pass through computer-controlled hydraulic system, through oil-feed loop, supply with the maximum working pressure (MWP) 48MPa of center-rotary joint 5, open motor 1, make center-rotary joint 5 carry out gyration according to 15r/min, each 2.5min of rotating, by inlet pressure sensor 8 and outlet pressure sensor 9, detect and record the force value of its import and export, and pass to data collecting instrument, be finally given to computing machine and data processing software, be converted into the forms such as chart, then carry out analyzing and processing.
In addition, this center-rotary joint performance test detection method also comprises rated flow tentative module, specifically refers to Fig. 6, the figure shows the block scheme of rated flow tentative module described in present embodiment.
As shown in Figure 6, this rated flow tentative module comprises the following steps:
S61, controls hydraulic system with predetermined rated Output pressure, starts drive unit and drives the rotating member of center-rotary joint 5 to rotate;
S62, the inlet flow rate Q of Real-time Obtaining center-rotary joint 5
1with rate of discharge Q
2;
S63, with inlet flow rate Q
1with rate of discharge Q
2meeting the second formula is condition, obtains the stable judged result of rated flow; Described the second formula is as follows:
│ [(Q
1+ Q
2)/2-Q]/Q │ <Q
p, in formula, Q is rated flow, Q
pfor preset flow compares threshold value.Preferably, this preset flow is than threshold value Q
pfor 1%-2%.
For example, control hydraulic system, through oil-feed loop, supply with the rated pressure of center-rotary joint 5, after pressure stability, open motor 1, make center-rotary joint 5 carry out gyration according to the rotating speed of 15r/min, each 2.5min of rotating, is detected and is recorded the flow value of its import and export by inlet flow rate sensor 11 and outlet flow sensor 12, and pass to data collecting instrument, finally be given to computing machine and data processing software, be converted into the forms such as chart, then carry out analyzing and processing.
In addition, the center-rotary joint performance test detection method that present embodiment provides can also comprise steering resistance square tentative module, specifically refers to Fig. 7, the figure shows the block scheme of steering resistance square test described in present embodiment.
As shown in Figure 7, this steering resistance square test comprises the following steps:
S71, controls hydraulic system and exports with predetermined maximum working pressure (MWP), starts drive unit and drives the rotating member of center-rotary joint to rotate;
S72, the moment T of center-rotary joint described in Real-time Obtaining;
S73, it is condition that the described moment T of take meets the 3rd formula, obtains the stable judged result of steering resistance square; Described the 3rd formula is as follows:
T<T
p; Wherein, T
pfor default torque threshold.
For example, add to maximum working pressure (MWP) to each interface, open motor 1, make center-rotary joint 5 carry out gyration according to the rotating speed of 15r/min, each 2.5min of rotating, real-time moment while measuring and recording center-rotary joint 5 rotation by torque speed sensor 4, and pass to data collecting instrument, and be finally given to computing machine and data processing software, be converted into the forms such as chart, carry out again analyzing and processing, with real-time moment, be less than T
pfor default torque threshold 100NM is qualified.
Specifically carry out in every process of the test, drive unit drives the rotating member of center-rotary joint to rotate and reverse each schedule time length, and for example, the 2min-4min that reverses again after forward 2min-4min, to guarantee that testing result is based on obtaining under steady running state.
This programme can also carry out pressurize test, the test of starting reactance square, impermeability test, endurancing of the Static and dynamic of center-rotary joint etc., and it specifically detects principle can adopt existing techniques in realizing, repeats no more herein.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (15)
1. center-rotary joint performance test detection method, is characterized in that, comprises maximum working pressure (MWP) tentative module, and described maximum working pressure (MWP) tentative module comprises the following steps:
Control hydraulic system and export with predetermined maximum working pressure (MWP), start drive unit and drive the rotating member of center-rotary joint to rotate;
The intake pressure P of center-rotary joint described in Real-time Obtaining
1with top hole pressure P
2;
With described intake pressure P
1with top hole pressure P
2meeting the first formula is condition, obtains the stable judged result of maximum working pressure (MWP); Described the first formula is as follows:
P
1-P
2<P
p, in formula, P
pfor default pressure drop threshold value.
2. center-rotary joint performance test detection method according to claim 1, is characterized in that, described default pressure drop threshold value P
pfor 0.05MPa-0.2MPa.
3. center-rotary joint performance test detection method according to claim 1, is characterized in that, also comprises rated flow tentative module, and described rated flow tentative module comprises the following steps:
Control hydraulic system with predetermined rated Output pressure, start drive unit and drive the rotating member of center-rotary joint to rotate;
The inlet flow rate Q of center-rotary joint described in Real-time Obtaining
1with rate of discharge Q
2;
With described inlet flow rate Q
1with rate of discharge Q
2meeting the second formula is condition, obtains the stable judged result of rated flow; Described the second formula is as follows:
│ [(Q
1+ Q
2)/2-Q]/Q │ <Q
p, in formula, Q is rated flow, Q
pfor preset flow compares threshold value.
4. center-rotary joint performance test detection method according to claim 3, is characterized in that, described preset flow is than threshold value Q
pfor 1%-2%.
5. center-rotary joint performance test detection method according to claim 1, is characterized in that, also comprises the test of steering resistance square, and described steering resistance square test comprises the following steps:
Control hydraulic system and export with predetermined maximum working pressure (MWP), start drive unit and drive the rotating member of center-rotary joint to rotate;
The moment T of center-rotary joint described in Real-time Obtaining;
It is condition that the described moment T of take meets the 3rd formula, obtains the stable judged result of steering resistance square; Described the 3rd formula is as follows:
T<T
p; Wherein, T
pfor default torque threshold.
6. according to the center-rotary joint performance test detection method described in any one in claim 1 to 5, it is characterized in that, described drive unit drives the rotating member of center-rotary joint to rotate and reverse each schedule time length.
7. center-rotary joint performance test detection method according to claim 6, is characterized in that, described schedule time length is 2min-4min.
8. center-rotary joint performance test detection system, comprising:
Drive unit, for driving the rotating member of described center-rotary joint to rotate;
Hydraulic system, for setting up the test loop of described center-rotary joint;
Inlet oil temperature sensor, is arranged on the oil-feed branch road of described center-rotary joint; With
Torque speed sensor, is arranged between described center-rotary joint and the output terminal of described drive unit; It is characterized in that, also comprise:
Inlet pressure sensor, is arranged on the oil-feed branch road of described center-rotary joint;
Outlet pressure sensor, is arranged on the fuel-displaced branch road of described center-rotary joint; With
Controller, in hydraulic system, with predetermined maximum working pressure (MWP), export, under the state that the rotating member of drive unit drive center-rotary joint rotates, described controller receives the intake pressure P1 of described inlet pressure sensor Real-time Collection and the top hole pressure P2 of described outlet pressure sensor Real-time Collection, and with described intake pressure P
1with top hole pressure P
2meeting the first formula is condition, obtains the stable judged result of maximum working pressure (MWP); Described the first formula is as follows:
P
1-P
2<P
p, in formula, P
pfor default pressure drop threshold value.
9. center-rotary joint performance test detection system according to claim 8, is characterized in that, also comprises:
Inlet flow rate sensor, is arranged on the oil-feed branch road of described center-rotary joint; With
Outlet flow sensor, is arranged on the fuel-displaced branch road of described center-rotary joint;
In hydraulic system, with predetermined rated Output pressure, under the state that the rotating member of drive unit drive center-rotary joint rotates, described controller also receives the inlet flow rate Q of described inlet flow rate sensor Real-time Collection
1rate of discharge Q with described outlet flow sensor Real-time Collection
2, and with described inlet flow rate Q
1with rate of discharge Q
2meeting the second formula is condition, obtains the stable judged result of rated flow; Described the second formula is as follows:
│ [(Q
1+ Q
2)/2-Q]/Q │ <Q
p, in formula, Q is rated flow, Q
pfor preset flow compares threshold value.
10. center-rotary joint performance test detection system according to claim 8, it is characterized in that, in hydraulic system, with predetermined maximum working pressure (MWP), export, under the state that the rotating member of drive unit drive center-rotary joint rotates, described controller also receives the moment of described torque speed sensor Real-time Collection, and take described moment T, to meet the 3rd formula be condition, obtains the stable judged result of steering resistance square; Described the 3rd formula is as follows:
T<T
p; Wherein, T
pfor default torque threshold.
Center-rotary joint performance test detection system in 11. according to Claim 8 to 10 described in any one, it is characterized in that, described controller is industrial computer, by the data message of data collecting instrument receiving sensor Real-time Obtaining, and can show judged result by diagrammatic form.
12. center-rotary joint performance test detection systems according to claim 11, is characterized in that, also comprise selector switch, and are configured to: the manual mode that automatically carries out the automatic mode of each test and manually carry out each test.
13. center-rotary joint performance test detection systems according to claim 8, is characterized in that, also comprise swivel coupling frock, this frock comprises:
Supporting disk, is arranged on fixed rack by bearing, and for being fixedly connected with the rotating member of center-rotary joint to be measured, and the output terminal of described drive unit and the lower end of described supporting disk are in transmission connection;
Pull-fork assembly, is arranged on described fixed rack, for being fixedly connected with the non-rotating member of center-rotary joint to be measured; With
Side is carried bringing device, for applying lateral action power in the non-rotating member of center-rotary joint to be measured.
14. center-rotary joint performance test detection systems according to claim 13, is characterized in that, described pull-fork assembly comprises:
Column, is fixedly installed on the described fixed rack of described supporting disk side; With
Shift fork, one end and described column-type are spacing circumferentially, and the other end is for being fixedly connected with the non-rotating member of center-rotary joint to be measured; And
Described side is carried bringing device and is arranged on described column.
15. center-rotary joint performance test detection systems according to claim 14, is characterized in that, described side is carried bringing device and comprised:
Elastomeric element, is fixedly installed on described column, and the described elastomeric element under trystate has precompressed deformation; With
Pushing block, is fixedly connected with the external part of described elastomeric element.
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