CN105179381A - Rotating device and reliability testing device of centre revolving joint - Google Patents
Rotating device and reliability testing device of centre revolving joint Download PDFInfo
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- CN105179381A CN105179381A CN201510686088.1A CN201510686088A CN105179381A CN 105179381 A CN105179381 A CN 105179381A CN 201510686088 A CN201510686088 A CN 201510686088A CN 105179381 A CN105179381 A CN 105179381A
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Abstract
The invention discloses a rotating device and a reliability testing device of a centre revolving joint. The rotating device is used for the reliability test of the centre revolving joint, and comprises a fixed part and a rotating part rotatably arranged relatively to the fixed part, wherein the fixed part comprises a plurality of first openings and a plurality of first flow channels which are correspondingly communicated with the plurality of the first openings; the rotating part comprises a plurality of second flow channels which are correspondingly communicated with the plurality of the first flow channels, and a plurality of second openings which are correspondingly communicated with the plurality of the second flow channels; each first opening and the corresponding first flow channel, the corresponding second flow channel and the corresponding second opening form a separate fluid channel. When the rotating device is adopted in the reliability test of the centre revolving joint, the rotating device enables a fixing body and a sleeve of the centre revolving joint to be in a relatively rotating state, and the testing condition of the centre revolving joint is enabled to be similar to a real working condition, so that a more accurate testing result can be obtained.
Description
Technical field
The present invention relates to engineering machinery field, particularly the reliability test of a kind of whirligig and centre revolving joint.
Background technique
Centre revolving joint is widely used in the engineering machinery such as hoist, excavator, and it is a kind of set many oil circuits, and the hydraulic oil that engineering machinery is got off and electrical system are transported to engineering machinery and get on the bus the device of actuator.
Centre revolving joint is generally made up of sleeve, fixed body and Sealing.Sleeve is fixed on revolving dial, follows revolving dial revolution.The fixed body be arranged in sleeve is fixed on chassis motionless.Be provided with between sleeve and fixed body and be connected and the oil circuit equal with pipeline number by annular oil groove.The hydraulic oil of mouth is driven into from the oil circuit fixed body, arrive corresponding annular oil groove by the upright opening be arranged on fixed body and export supply actuator by the oil circuit be arranged on sleeve, even if sleeve constantly turns round with top car body, annular oil groove on fixed body also can keep unimpeded with the oil circuit opening on sleeve, hydraulic oil can freely be passed in and out.
Sealability between the sleeve of centre revolving joint and the different oil circuits of fixed body directly affects the service behaviour of engineering machinery, and can because accuracy of manufacturing and in relative rotation wearing and tearing cause sealability to decline between sleeve and fixed body, cause phenomenon of " altering oil " between common oil circuit, directly have influence on the working performance of overall engineering machine hydraulic system.In order to assessment center swivel coupling oil circuit between sealability, need to carry out reliability trial to it.
The Chinese patent application that denomination of invention is " durability test method for central rotary joint and special purpose device ", publication number is CN102042934A discloses the first prior art.Fig. 1 is the test principle figure being carried out centre revolving joint endurance test by the special purpose device of the first prior art.Wherein each reference character represents respectively: 1' is motor, and 2' is oil hydraulic pump, and 3' is safety valve, 4' is three-position four-way electromagnetic directional valve, 5' is first throttle valve, and 6' is second throttle, and 7' is reduction valve, 8' is 2/2-way solenoid directional control valve, 9' is radial pressurized cylinder, and 10' is oil hydraulic cylinder, swivel coupling test tool centered by 11', 12' is stroke detection switch, swivel coupling centered by 13'.
As shown in Figure 1, in the first prior art, the motor 1' of special purpose device is connected with oil hydraulic pump 2', the output terminal of oil hydraulic pump 1' connects oil cylinder by safety valve 3', oil hydraulic pump 2' is connected with radial pressurized cylinder 9' with 2/2-way solenoid directional control valve 8' by reduction valve 7', oil hydraulic pump 2' is also connected with the rod end of oil hydraulic cylinder 10' with first throttle valve 5' by three-position four-way electromagnetic directional valve 4', the rear end of oil hydraulic cylinder 10' is by three-position four-way electromagnetic directional valve 4' connected tank, the piston rod of oil hydraulic cylinder 10' is connected with center swivel joint test tool 11', stroke detection switch 12' is respectively equipped with at the two ends of center swivel joint test tool 11', center swivel joint test tool 13' is provided with centre revolving joint 13'.
There is following shortcoming in the first prior art above:
1, ensure that centre revolving joint automatic reciprocating rotation in certain stroke, but limited by tool structure restriction centre revolving joint rotation angle range;
2, the inner each oil circuit of centre revolving joint is high pressure conditions at the trial, and do not meet actual conditions, therefore test result is inaccurate;
3, the inner each oil pocket fluid of centre revolving joint is closed, and in turning course, be in the state that builds the pressure all the time, the heat that inner chamber fluid produces cannot dispel the heat, and causes high oil temperature to carry out continuity test.
The Chinese patent application that denomination of invention is " durability test method for central rotary joint and device thereof ", publication number is CN102944365A discloses the second prior art.Fig. 2 is the hydraulic schematic diagram being carried out centre revolving joint endurance test by the testing apparatus of the second prior art.Wherein each reference character represents respectively: 1 and 25 is filter screen, 2 is oil pump motor, 3 is oil pump, and 4 is pressure-relief valve, and 5 is one-way valve, 6 is accumulator, 7 is pressure gauge, and 8 is pressure upper limit relay, and 9 is threshold pression relay, 11,12 for adding pressure release solenoid directional control valve, 13,14 is joint, and 15 is drive motor, and 16,21,22,23 is the time relay, 17,18,19 is pipe, 20 is draining solenoid directional control valve, and 24 is band spring one-way valve, and 26 is oil sump, 27 is mandrel fitting seat, swivel coupling centered by 28.
As shown in Figure 2, the second prior art bar oil circuit each in centre revolving joint 28 is connected into two mutual independent pipelines of isolating that intersect, and while the sleeve and fixed body relative movement of centre revolving joint 28, apply the hydraulic oil of high and low pressure checker to these independent pipelines, and after certain high and low oil pressure checker cycle, change to these two independent pipelines the fresh oil once cooled test.
There is following shortcoming in above the second prior art:
1, rotated by motoring centre revolving joint, but making bidirectional reciprocating when centre revolving joint single direction rotation and centre revolving joint real work rotate operating mode during test is not inconsistent;
2, in process of the test the inner each oil circuit of centre revolving joint pressurize in turn, the mode of interval draining, serve the effect of heat radiation to a certain extent, but do not consider the impact of the mobility of fluid on centre revolving joint reliability trial;
3, the mode that each bar oil circuit separates connection is mutually difficult to pressure rating corresponding to runner each from centre revolving joint mutually corresponding (in-line is different with pressure rating corresponding to oil circuit), also can affect the credibility of test result.
In a word, prior art does not carry out reliability trial in conjunction with the working environment of centre revolving joint and applying working condition completely, therefore affects the accuracy of test result.
Summary of the invention
The object of the present invention is to provide the reliability test of a kind of whirligig and centre revolving joint, the working environment of Simulation Center swivel coupling and applying working condition better when being intended to carry out reliability trial, improve the accuracy of test result.
First aspect present invention provides a kind of whirligig, for the reliability trial of centre revolving joint, the rotary part that described whirligig comprises fixing part and rotatably arranges relative to described fixing part, described fixing part comprises multiple first opening and keeps the corresponding multiple first flows be communicated with described multiple first opening respectively, described rotary part comprises and keeps corresponding multiple second runner be communicated with respectively with described multiple first flow and keep corresponding multiple second openings be communicated with described multiple second runner respectively, each described first opening and corresponding described first flow, corresponding described second runner and corresponding described second opening form independently fluid passage.
Further, described rotary part comprises solid of rotation, described fixing part comprises the fixed cover coaxially arranged with described solid of rotation, described fixed cover is sheathed on the periphery of described solid of rotation, wherein, described first opening and described first flow are arranged on described fixed cover, and described second opening and described second runner are arranged on described solid of rotation.
Further, described solid of rotation comprises large-diameter portion and minor diameter part, be connected by step surface between described large-diameter portion with described minor diameter part, described minor diameter part is positioned at described fixed cover, described second opening is arranged at the perisporium of described large-diameter portion, and described second runner comprises the circular groove of the perisporium being opened in described minor diameter part.
Further, described whirligig also comprises friction-reducing structure, and described friction-reducing structure is arranged between the end face of described step surface and the described fixed cover relative with described step surface.
Further, described whirligig also comprise be arranged between described solid of rotation and described fixed cover for isolate different described fluid passages or for anti-fluid from the seal element leaked between described solid of rotation and described fixed cover.
Further, described fixing part also comprises the base for being connected with test-bed, and described fixed cover is fixedly connected on above described base, and described solid of rotation to be rotatably mounted in above described base relative to described base and to be positioned at described fixed cover.
Further, described rotary part also comprises transmission shaft, and described transmission shaft is connected with the bottom of described solid of rotation to drive described solid of rotation to rotate.
Further, described rotary part also comprises the rotating platform for being connected with described centre revolving joint, and described rotating platform is fixedly connected with described solid of rotation and is positioned at the top of described solid of rotation.
Further, described fixing part comprises the stand joint for being connected with test-bed, and described rotary part comprises the fixed body joint for being connected with the fixed body of described centre revolving joint.
Second aspect present invention provides a kind of reliability test of centre revolving joint, described reliability test comprises whirligig, oil hydraulic pump, fictitious load and the rotating driving device for driving the rotary part of described whirligig to rotate according to any one of first aspect present invention, described whirligig relatively rotates for the fixed body and sleeve making described centre revolving joint, and described oil hydraulic pump, described whirligig, described centre revolving joint and described fictitious load are connected to form the hydraulic pressure test loop of the reliability trial of described centre revolving joint.
Further, the each described fluid passage of described whirligig comprises active channel and oil outlet passage, first opening of each described active channel is respectively used to be connected with described hydraulic pressure delivery side of pump, second opening of each described active channel is respectively used to be connected with the opening of each in-line be positioned on described fixed body of described centre revolving joint, first opening of described oil outlet passage is used for being connected with oil extraction, the opening of the second opening for the oil extraction road be positioned on described fixed body with described centre revolving joint of described oil outlet passage is connected, the import of described fictitious load is connected for the opening of each in-line be positioned on described sleeve with described centre revolving joint, the opening of outlet for the oil extraction road be positioned on described sleeve with described centre revolving joint of described fictitious load is connected.
Further, described reliability test comprises the first quick union, and described first quick union is for connecting the first opening of described hydraulic pressure delivery side of pump and each described active channel; And/or described reliability test comprises the second quick union, described second quick union is for the opening being positioned at each in-line on described fixed body of the second opening and described centre revolving joint that connect each described active channel; And/or described reliability test comprises the 3rd quick union, described 3rd quick union is positioned at the opening of each in-line on described sleeve and the import of described fictitious load for what connect described centre revolving joint.
Further, described fictitious load comprises the load forming apparatus of the induced pressure for the formation of described centre revolving joint, the import of described load forming apparatus is connected with the import of described fictitious load, and the outlet of described load forming apparatus is connected with the outlet of described fictitious load.
Further, described load forming apparatus comprises the first relief valve, and the import of described first relief valve is connected with the import of described fictitious load, and the outlet of described first relief valve is connected with the outlet of described fictitious load.
Further, described fictitious load also comprises the induced pressure control gear for controlling the induced pressure change that described load forming apparatus is formed.
Further, described induced pressure control gear at least can control the second induced pressure that described load forming apparatus forms the first induced pressure and is less than described first induced pressure.
Further, described load forming apparatus comprises the first relief valve, described induced pressure control gear comprises control valve and the second relief valve, the import of described first relief valve is connected with the import of described fictitious load, the outlet of described first relief valve is connected with the outlet of described fictitious load, the import of described second relief valve is communicated with the spring chamber of described first relief valve by described control valve, the outlet of described second relief valve is communicated with oil extraction, wherein, described control valve for control described first relief valve spring chamber selectively with the inlet communication of described second relief valve or be communicated with oil extraction.
Further, described control valve is solenoid valve, described solenoid valve comprises the first valve port, second valve port and the 3rd valve port, described first valve port is communicated with the spring chamber of described first relief valve, the inlet communication of described second valve port and described second relief valve, described 3rd valve port is communicated with oil extraction, described solenoid valve has the first valve position and the second valve position, in the first valve position of described solenoid valve, described first valve port is communicated with described second valve port and disconnects with described 3rd valve port, in described second valve position, described first valve port disconnects with described second valve port and is communicated with described 3rd valve port.
Further, described rotating driving device comprises oil hydraulic motor, described oil hydraulic motor is connected by driving oil circuit with described oil hydraulic pump, and the output terminal of described oil hydraulic motor drives with the rotary part of described whirligig and is connected, and rotates to drive described rotary part under the driving of described oil hydraulic pump.
Further, described driving oil circuit comprises the selector valve of the sense of rotation for controlling described oil hydraulic motor.
Further, described selector valve comprises the first hydraulic fluid port, second hydraulic fluid port, 3rd hydraulic fluid port and the 4th hydraulic fluid port, described first hydraulic fluid port is connected with described hydraulic pressure delivery side of pump, described second hydraulic fluid port is communicated with oil extraction, import and export for one of described 3rd hydraulic fluid port and described oil hydraulic motor and be connected, another of described 4th hydraulic fluid port and described oil hydraulic motor is imported and exported and is connected, described selector valve has the first valve position and the second valve position, in the first valve position of described selector valve, described first hydraulic fluid port is communicated with described 3rd hydraulic fluid port, described second hydraulic fluid port is communicated with described 4th hydraulic fluid port, in the second valve position of described selector valve, described first hydraulic fluid port is communicated with described 4th hydraulic fluid port, described second hydraulic fluid port is communicated with described 3rd hydraulic fluid port.
Further, described driving oil circuit comprises accumulator, and described accumulator is connected between described hydraulic pressure delivery side of pump and described oil hydraulic motor.
Further, described driving oil circuit comprises one-way valve, and described one-way valve is connected between described hydraulic pressure delivery side of pump and described accumulator, and the import of described one-way valve is connected with described hydraulic pressure delivery side of pump.
Further, described driving oil circuit comprises reduction valve, and described reduction valve is connected between described hydraulic pressure delivery side of pump and described accumulator.
Further, described reliability test also comprises safety valve, and described safety valve is arranged at described hydraulic pressure delivery side of pump.
Based on the reliability test of whirligig provided by the invention and centre revolving joint, this whirligig is adopted in the reliability trial of centre revolving joint, whirligig can make the fixed body of centre revolving joint and sleeve be in state in relative rotation, make the test conditions of centre revolving joint and actual service conditions close, thus test result more accurately can be obtained.Further, whirligig is adopted can to realize the mutually isolated oil circuit of each bar to centre revolving joint fuel feeding and not by rotational interference, form hydraulic pressure test loop, hydraulic oil dispels the heat because circulating well, ensure that the continuity of test simultaneously.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the test principle figure being carried out centre revolving joint endurance test by the special purpose device of the first prior art.
Fig. 2 is the hydraulic schematic diagram being carried out centre revolving joint endurance test by the testing apparatus of the second prior art.
Fig. 3 is the structural representation of the whirligig of the reliability trial for centre revolving joint of the embodiment of the present invention.
Fig. 4 is the principle schematic of the reliability test of the centre revolving joint of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
For convenience of description, here can usage space relative terms, as " ... on ", " in ... top ", " at ... upper surface ", " above " etc., be used for the spatial relation described as a device shown in the figure or feature and other devices or feature.Should be understood that, space relative terms is intended to comprise the different azimuth in use or operation except the described in the drawings orientation of device.Such as, " in other devices or structure below " or " under other devices or structure " will be positioned as after if the device in accompanying drawing is squeezed, being then described as the device of " above other devices or structure " or " on other devices or structure ".Thus, exemplary term " in ... top " can comprise " in ... top " and " in ... below " two kinds of orientation.This device also can other different modes location (90-degree rotation or be in other orientation), and relatively describe space used here and make respective explanations.
Fig. 3 is the structural representation of the whirligig of the reliability trial for centre revolving joint of the embodiment of the present invention.Fig. 4 is the principle schematic of the reliability test of the centre revolving joint of the embodiment of the present invention.
As shown in Figure 3 with shown in Fig. 4, the whirligig 110 of the present embodiment is for the reliability trial of centre revolving joint.The rotary part that this whirligig 110 comprises fixing part and rotatably arranges relative to fixing part.Fixing part comprises multiple first opening and keeps the corresponding multiple first flows be communicated with multiple first opening respectively.Rotary part comprises and keeps corresponding multiple second runner be communicated with respectively with multiple first flow and keep corresponding multiple second openings be communicated with multiple second runner respectively.Each first opening forms independently fluid passage with corresponding first flow, the second corresponding runner and the second corresponding opening.One in first opening of each fluid passage and the second opening for acceptance test fluid, another is for being delivered to centre revolving joint by the test fluid of reception.
This whirligig 110 is adopted in the reliability trial of centre revolving joint, whirligig 110 can make the fixed body 1111 of centre revolving joint 111 and sleeve 1112 be in state in relative rotation, make the test conditions of centre revolving joint 111 and actual service conditions close, thus test result more accurately can be obtained.Further, whirligig 110 is adopted can to realize the mutually isolated oil circuit of each bar to centre revolving joint 111 fuel feeding and not by rotational interference, form hydraulic pressure test loop, hydraulic oil dispels the heat because circulating well, ensure that the continuity of test simultaneously.Moreover, sleeve 1112 and fixed body 1111 relative rotary motion of centre revolving joint 111 is realized by whirligig 110, also make the outlet line geo-stationary of the oil feed line of oil hydraulic pump 102 and the sleeve 1112 of centre revolving joint 111, avoid the interference between pipeline, winding, and therefore, the positive and negative direction automatic rotation action of the full angle of centre revolving joint 111 can be realized, make the test conditions of centre revolving joint 111 realistic operating conditions better.
As shown in Figure 4, in the present embodiment, fixing part is used for being fixedly connected with test-bed, and rotary part is used for being fixedly connected with the fixed body 1111 of centre revolving joint 111.Therefore, in the present embodiment, fixing part comprises the stand joint for being connected with test-bed, and rotary part comprises the fixed body joint for being connected with the fixed body of centre revolving joint.
As shown in Figure 3, in the present embodiment, rotary part comprises solid of rotation 1101, transmission shaft 1106 and rotating platform 1107; Fixing part comprises fixed cover 1102 and base 1105.
As shown in Figure 3 and Figure 4, the fixed cover 1102 of fixing part is coaxially arranged with the solid of rotation 1101 of rotary part, and fixed cover 1102 is sheathed on the periphery of solid of rotation 1101.
First opening and first flow are arranged on fixed cover 1102, and the second opening and the second runner are arranged on solid of rotation 1101.Solid of rotation 1101 is fixedly connected with by rotating platform 1107 with the sleeve 1112 of centre revolving joint 111, to rotate with the fixed body 1111 of moving sleeve 1112 relative to centre revolving joint 111.
As shown in Figure 3, in the present embodiment, solid of rotation 1101 comprises large-diameter portion and minor diameter part, is connected between large-diameter portion with minor diameter part by step surface.Minor diameter part is positioned at fixed cover 1102.Second opening is arranged on the perisporium of the large-diameter portion of solid of rotation 1101.Second runner comprises the circular groove of the perisporium of the minor diameter part being opened in solid of rotation 1101.Offer circular groove can remain first flow and the second corresponding runner connection when solid of rotation 1101 rotates relative to fixed cover 1102.
Whirligig 110 also comprises gasket ring 1103, gasket ring 1103 be arranged on step surface and and step surface be relatively fixed cover 1102 end face between.Gasket ring 1103 is mainly used in reducing the frictional force between solid of rotation 1101 and fixed cover 1102.Gasket ring 1103 can adopt antifriction material to make.Certainly, gasket ring 1103 can adopt other friction-reducing structure to replace, and such as, the antifriction layer on the end face being arranged at step surface or fixed cover 1102 can be adopted to substitute gasket ring 1103 etc.
Whirligig 110 also comprise be arranged between solid of rotation 1101 and fixed cover 1102 for isolate different fluid passages or for anti-fluid between solid of rotation 1101 and fixed cover 1102 leak seal element 1104.As shown in Figure 3, in the present embodiment, between different fluid passages and on the fluid passage of top and under the fluid passage of bottommost, be all provided with seal element 1104.In the present embodiment, each seal element 1104 is seal ring.
The base 1105 of fixing part is for being connected with test-bed.Fixed cover 1102 is fixedly connected on above base 1105.Solid of rotation 1101 to be rotatably mounted in above base 1105 relative to base 1105 and to be positioned at fixed cover 1102.As shown in Figure 3, base 1105 is for having central through bore and being disposed radially inside and outside two flange plate type base organizing attachment hole, and fixed cover 1102 is fixedly connected with base 1105 by the multiple screw through one group of attachment hole of radially inner side.Base 1105 is connected with test-bed by the multiple screws through one group of attachment hole of radial outside.Also be that in the present embodiment, aforementioned stand joint is arranged on base 1105, and one group of attachment hole of this radial outside forms aforementioned stand joint.
The transmission shaft 1106 of rotary part is connected with the bottom of solid of rotation 1101 and rotates with driving rotating bodies 1101.As shown in Figure 3, in the present embodiment, the central through bore of base 1105 is passed in one end of transmission shaft 1106, and the other end stretches in the attachment hole bottom solid of rotation 1101 and is connected with solid of rotation 1101.The mode that transmission shaft 1106 can be connected by interference fit or key with solid of rotation 1101 connects.Arrange convex shoulder in the middle part of transmission shaft 1106, the end face of convex shoulder abuts with the bottom surface of solid of rotation 1101.
The rotating platform 1107 of rotary part is for being connected with centre revolving joint 111, and rotating platform 1107 is fixedly connected with solid of rotation 1101 and is positioned at the top of solid of rotation 1101.As shown in Figure 3, rotating platform 1107 has the radially inside and outside two groups of attachment holes arranged, can be fixedly connected on solid of rotation 1101 by rotating platform 1107 by multiple screws of one group of attachment hole through radial outside, one group of attachment hole of radially inner side is screw, for connecting centre revolving joint.Also be that in the present embodiment, aforementioned fixed body joint is arranged on rotating platform 1107, one group of attachment hole of this radially inner side forms fixed body joint.
As shown in Figure 4, the reliability test of the centre revolving joint of the embodiment of the present invention comprises aforesaid whirligig 110, oil hydraulic pump 102, fictitious load 115 and the rotating driving device for driving the rotary part of whirligig 110 to rotate, wherein, whirligig 110 relatively rotates for the fixed body 1111 and sleeve 1112 making centre revolving joint 111, and oil hydraulic pump 102, whirligig 110, centre revolving joint 111 and fictitious load 115 are connected to form the hydraulic pressure test loop of the reliability trial of centre revolving joint 111.Oil hydraulic pump 102 can be driven by motor 103.
Have employed whirligig 110 and the advantage of reliability test has been addressed above, this reliability test has all advantages had when whirligig 110 is applied to the reliability trial of centre revolving joint, such as, fixed body 1111 and the sleeve 1112 of centre revolving joint 111 are in state in relative rotation, make the test conditions of centre revolving joint 111 and actual service conditions close, thus test result more accurately can be obtained; The mutually isolated oil circuit of each bar to centre revolving joint 111 fuel feeding and not by rotational interference, form hydraulic pressure test loop, hydraulic oil dispels the heat because circulating well, ensure that the continuity etc. of test simultaneously can be realized.
As shown in Figure 4, in the present embodiment, each fluid passage of whirligig 110 comprises active channel and oil outlet passage.First opening of each active channel is respectively used to be connected with the outlet of oil hydraulic pump 102.Second opening of each active channel is respectively used to be connected with the opening of each in-line be positioned on fixed body 1111 of centre revolving joint 111.First opening of oil outlet passage is used for being connected with oil extraction.Second opening of oil outlet passage is used for being connected with the opening on the oil extraction road be positioned on fixed body 1111 of centre revolving joint 111.The import of fictitious load 115 is used for being connected with the opening of each in-line be positioned on sleeve 1112 of centre revolving joint 111.The outlet of fictitious load is used for being connected with the opening on the oil extraction road be positioned on sleeve 1112 of centre revolving joint 111.
Thus, connect in aforementioned reliability test until examination centre revolving joint 111 after forming hydraulic pressure test loop, when carrying out the reliability trial of centre revolving joint 111, hydraulic oil flows through the first opening of the active channel of whirligig 110 successively from the outlet of oil hydraulic pump 102, active channel, second opening of active channel, be positioned at the opening of each in-line on fixed body 1111, the in-line of centre revolving joint 111, be positioned at the opening of each in-line on sleeve 1112, the import of fictitious load 115, fictitious load 115, the outlet of fictitious load 115, be positioned at the opening on the oil extraction road on sleeve 1112, the oil extraction road of centre revolving joint 111, be positioned at the opening on the oil extraction road on fixed body 1111, second opening of the oil outlet passage of whirligig 110, oil outlet passage, oil extraction after first opening of the oil outlet passage of whirligig 110.Therefore, reliability trial can be carried out continuously, and the actual operating conditions of test conditions and centre revolving joint 111 is more close, and hydraulic oil dispels the heat because circulating well.
In the present embodiment, oil extraction passes into fuel tank 116, and oil hydraulic pump 102 is by filter 101 oil suction from fuel tank 116.
As shown in Figure 4, in the present embodiment preferably, reliability test comprises the first quick union 112, second quick union 113 and the 3rd quick union 114.First quick union 112 is for the first opening of the outlet of connecting fluid press pump 102 and each active channel of whirligig 110.Second opening of the second quick union 113 for each active channel of connection rotary device 110 and the opening being positioned at each in-line on fixed body 1111 of centre revolving joint 111.3rd quick union 114 is positioned at the opening of each in-line on sleeve 1112 and the import of fictitious load 115 for what connect centre revolving joint 111.What make each oil circuit form mutually isolated independent flow passage by the first quick union 112, second quick union 113 and the 3rd quick union 114 arranges the connection speed and degree easy to connect that can improve corresponding tie point, is beneficial to the test efficiency improving reliability test.
Fictitious load 115 comprises the load forming apparatus of the induced pressure for the formation of centre revolving joint 111.The import of load forming apparatus is connected with the import of fictitious load 115, and the outlet of load forming apparatus is connected with the outlet of fictitious load 115.
Load forming apparatus can be the hydraulic element of build-up pressure in any hydraulic pressure test loop between fictitious load 115 and the outlet of oil hydraulic pump 102, such as, can be stop valve, selector valve, relief valve etc.
As shown in Figure 4, in the present embodiment preferably, the import that load forming apparatus comprises the first relief valve 1151, first relief valve 1151 is connected with the import of fictitious load 115, and the outlet of the first relief valve 1151 is connected with the outlet of fictitious load 115.This arrange can when the pressure in hydraulic pressure test loop reaches the pressure of regulation automatically pressure limiting.
In addition preferably, fictitious load 115 also comprises the induced pressure control gear of the induced pressure change formed for control load forming apparatus.This arranges and can meet the test demand of tested centre revolving joint to different loads pressure.
In the present embodiment, induced pressure control gear at least control load forming apparatus can be formed the first induced pressure and is less than the second induced pressure of the first induced pressure.
As shown in Figure 4, particularly, the induced pressure control gear of the present embodiment comprises control valve and the second relief valve 1153.The import of the first relief valve 1151 is connected with the import of fictitious load 15, and the outlet of the first relief valve 1151 is connected with the outlet of fictitious load 115.The import of the second relief valve 1153 is communicated with by the spring chamber of control valve with the first relief valve 1151, and the outlet of the second relief valve 1153 is communicated with oil extraction.Wherein, control valve for control the first relief valve 1151 spring chamber selectively with the inlet communication of the second relief valve 1153 or be communicated with oil extraction.
Pass through control valve, the pressure that can control the spring chamber of the first relief valve 1151 switches between the oil pressure relief of oil extraction or the second relief valve 1153, thus change the oil pressure relief of the first relief valve 1151, and then namely the inlet pressure changing the first relief valve 1151 also changes the inlet pressure of fictitious load 115, thus change the induced pressure of centre revolving joint 111.Wherein, during the inlet communication of control valve control spring chamber and the second relief valve 1153, the induced pressure of centre revolving joint 111 is the first induced pressure, and when control valve control spring chamber is communicated with oil extraction, the induced pressure of centre revolving joint 111 is the second induced pressure.Therefore, above setting makes fictitious load 115 can realize simulating the automatic alternate cycle conversion of high and low oil pressure, meets the operating condition of test demand of centre revolving joint to different loads pressure.
As shown in Figure 4, in the present embodiment, control valve is solenoid valve 1152.Solenoid valve 1152 comprises the first valve port, second valve port and the 3rd valve port, first valve port is communicated with the spring chamber of the first relief valve 1151, the inlet communication of spring chamber and the first relief valve 1151, the inlet communication of the second valve port and the second relief valve 1153, 3rd valve port is communicated with oil extraction, solenoid valve 1152 has the first valve position and the second valve position, in the first valve position of solenoid valve 1152, first valve port is communicated with the second valve port and disconnects with the 3rd valve port, in the second valve position of solenoid valve 1152, first valve port disconnects with the second valve port and is communicated with the 3rd valve port, the outlet of the second relief valve 1153 is communicated with oil extraction.
In the present embodiment, solenoid valve 1152 is in particular two-bit triplet solenoid valve, and certainly, as long as can realize corresponding controlling functions, control valve can be solenoid valve or the hydraulic control valve of other form.
Wherein the first relief valve 1151 and secondary relief valve 1153 can according to the pressure rating setting pressures of the stream of tested centre revolving joint 111.The size of the first induced pressure and/or the second induced pressure can be changed by the oil pressure relief of change first relief valve 1151 and/or the second relief valve 1153.
In the embodiment shown in fig. 4, when solenoid valve 1152 dead electricity, solenoid valve 1152 is in the first valve position shown in Fig. 4, the spring chamber of the first relief valve 1151 and the inlet communication of the second relief valve 1153 and set up oil pressure, cause the oil pressure relief of the first relief valve 1151 larger, now induced pressure is the first induced pressure, and be high pressure oil by the hydraulic oil of tested centre revolving joint 11, centre revolving joint 111 is in heavy condition.When solenoid valve 1152 obtains electric, solenoid valve 1152 is in the second valve position, the spring chamber of the first relief valve 1151 is connected with oil extraction, cause the oil pressure relief of the first relief valve 1151 less, now induced pressure is the second induced pressure, be low pressure oil by the hydraulic oil of tested centre revolving joint 11, centre revolving joint 111 is in light condition.
Known according to above description, that can pass through Controlling solenoid valve 1152 in the present embodiment obtains electric opportunity and endurance, hydraulic control pump 102 provides the checker cycle of high and low oil pressure to tested centre revolving joint 111, to meet the test demand of tested centre revolving joint 11 pairs of different loads pressure.
Control because electrical signal can realize accurate continuous print, therefore adopt the credibility that can increase test during solenoid valve.
As shown in Figure 4, in the present embodiment, rotating driving device comprises oil hydraulic motor 109, oil hydraulic motor is connected by driving oil circuit with oil hydraulic pump 102, the output terminal of oil hydraulic motor 109 drives with the rotary part of whirligig 110 and is connected, be connected with the transmission shaft 1106 of rotary part in the present embodiment, rotate with driven rotary portion under the driving of oil hydraulic pump 102.This is arranged so that reliability test can be rotated hydraulic pressure test loop and oil hydraulic motor by oil hydraulic pump 102 simultaneously and provides pressure oil, simplifies and controls.
As shown in Figure 4, driving oil circuit comprises the selector valve 108 for the sense of rotation of hydraulic control motor 109.This arranges and can make to relatively rotate towards two contrary directions between the fixed body 1111 of centre revolving joint 111 and sleeve 1112, thus more close to the actual service conditions of centre revolving joint 111, thus test result more accurately can be obtained.
In the present embodiment, selector valve 108 comprises the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port, first hydraulic fluid port is connected with the outlet of oil hydraulic pump 102, second hydraulic fluid port is communicated with oil extraction, import and export for one of 3rd hydraulic fluid port and oil hydraulic motor 109 and be connected, another of the 4th hydraulic fluid port and oil hydraulic motor 109 is imported and exported and is connected.Selector valve 108 has the first valve position and the second valve position.In the first valve position of selector valve 108, the first hydraulic fluid port is communicated with the 3rd hydraulic fluid port, and the second hydraulic fluid port is communicated with the 4th hydraulic fluid port.In the second valve position of selector valve 108, the first hydraulic fluid port is communicated with the 4th hydraulic fluid port, and the second hydraulic fluid port is communicated with the 3rd hydraulic fluid port.
Particularly, in the present embodiment, selector valve 108 is three-position four-way electromagnetic directional valve.Certainly, selector valve also can be other form, such as, can be three six-way transfer valves etc.
As shown in Figure 4, in the present embodiment, when first control end a of selector valve 108 obtains electric, through the import and export fuel feeding of selector valve 108 to oil hydraulic motor 109, oil hydraulic motor 109 drives the fixed body 1111 of tested centre revolving joint 111 to rotate facing one direction by whirligig 110, particularly, oil hydraulic motor 109 drives fixed body 1111 to rotate by transmission shaft 1106, solid of rotation 1101, rotating platform 1107; When second control end b of selector valve 108 holds electric, through selector valve 108 another import and export fuel feeding to oil hydraulic motor 109, oil hydraulic motor 109 drives the fixed body 1111 of tested centre revolving joint 111 to rotate in the opposite direction by whirligig 110.Therefore, that can pass through control selector valve 108 obtains electric opportunity and endurance, and the positive and negative of hydraulic control motor 109 transfers turning to of the fixed body 1111 controlling tested centre revolving joint 111.
When selector valve 108 adopts solenoid directional control valve, control because electrical signal can realize accurate continuous print, the test of centre revolving joint therefore can be made more reliable.
As shown in Figure 4, in the present embodiment, drive oil circuit to comprise accumulator 107, accumulator 107 is connected between the outlet of oil hydraulic pump 102 and oil hydraulic motor 109.Particularly, accumulator 107 is connected between the outlet of oil hydraulic pump 102 and selector valve 108.Arranging of accumulator 107 can mildly make tested centre revolving joint 111 rotate by primer fluid pressure motor 109, improves the accuracy of test.
Preferably, drive oil circuit to comprise one-way valve 106, one-way valve 106 is connected between the outlet of oil hydraulic pump 102 and accumulator 107, and wherein the import of one-way valve 106 is connected with the outlet of oil hydraulic pump 102.This drives the hydraulic oil in oil circuit to flow backwards to the outlet of oil hydraulic pump 102 under arranging and can preventing some operating mode.
In addition preferably, drive oil circuit to comprise reduction valve 105, reduction valve 105 is connected between the outlet of oil hydraulic pump 102 and accumulator 107.Be connected to particularly between the outlet of oil hydraulic pump 102 and the import of one-way valve 106.This arranges and the hydraulic fluid pressure of driving oil circuit can be made to be in comparatively reasonably state, and need not be identical with the hydraulic fluid pressure of the outlet of oil hydraulic pump 102.
The reliability test of the present embodiment also comprises safety valve 104, and safety valve 104 is arranged at the outlet of oil hydraulic pump 102.Arranging of safety valve 104 can prevent the outlet hydraulic oil pressure of oil hydraulic pump 102 excessive, thus each hydraulic element of protection reliability testing apparatus.
The test principle of the reliability test of above centre revolving joint is:
While the sleeve 1112 and fixed body 1111 relative movement of centre revolving joint 111, oil hydraulic pump 102 provides hydraulic oil by whirligig 110 to the in-line that each bar in centre revolving joint 111 is mutually isolated, and apply high and low variable load pressure by each in-line of fictitious load 115 pairs of centre revolving joints 111, flow back to fuel tank 116 through independently oil extraction road again, form hydraulic pressure test loop.When carrying out reliability trial, motor 103 drives oil hydraulic pump 102 by each in-line respectively fuel feeding of whirligig 110 to tested centre revolving joint 111, again after fictitious load 115 applies induced pressure, flow back to fuel tank 116 by the oil circuit of tested centre revolving joint 111; Simultaneously the hydraulic oil that provides of oil hydraulic pump 102 through comprise reduction valve 105, one-way valve 1066, accumulator 1077, selector valve 108 driving oil circuit flow to oil hydraulic motor 109, oil hydraulic motor 109 drives whirligig 110 to make the fixed body 1111 of tested centre revolving joint 111 reciprocating rotary relative to sleeve 1112.Therefore, the reliability test of this centre revolving joint can the actual working environment of Simulation Center swivel coupling and applying working condition, to make test result more genuine and believable.
Finally should be noted that: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technological scheme scope of request of the present invention protection.
Claims (25)
1. a whirligig (110), for the reliability trial of centre revolving joint, it is characterized in that, the rotary part that described whirligig (110) comprises fixing part and rotatably arranges relative to described fixing part, described fixing part comprises multiple first opening and keeps the corresponding multiple first flows be communicated with described multiple first opening respectively, described rotary part comprises and keeps corresponding multiple second runner be communicated with respectively with described multiple first flow and keep corresponding multiple second openings be communicated with described multiple second runner respectively, each described first opening and corresponding described first flow, corresponding described second runner and corresponding described second opening form independently fluid passage.
2. whirligig according to claim 1 (110), it is characterized in that, described rotary part comprises solid of rotation (1101), described fixing part comprises the coaxial fixed cover (1102) arranged with described solid of rotation (1101), described fixed cover (1102) is sheathed on the periphery of described solid of rotation (1101), wherein, described first opening and described first flow are arranged on described fixed cover (1102), and described second opening and described second runner are arranged on described solid of rotation (1101).
3. whirligig according to claim 2 (110), it is characterized in that, described solid of rotation (1101) comprises large-diameter portion and minor diameter part, be connected by step surface between described large-diameter portion with described minor diameter part, described minor diameter part is positioned at described fixed cover (1102), described second opening is arranged at the perisporium of described large-diameter portion, and described second runner comprises the circular groove of the perisporium being opened in described minor diameter part.
4. whirligig according to claim 3 (110), it is characterized in that, described whirligig (110) also comprises friction-reducing structure, and described friction-reducing structure is arranged between the end face of described step surface and the described fixed cover (1102) relative with described step surface.
5. whirligig according to claim 2 (110), it is characterized in that, described whirligig (110) also comprise be arranged between described solid of rotation (1101) and described fixed cover (1102) for isolate different described fluid passages or for anti-fluid between described solid of rotation (1101) and described fixed cover (1102) leak seal element (1104).
6. whirligig according to claim 2 (110), it is characterized in that, described fixing part also comprises the base (1105) for being connected with test-bed, described fixed cover (1102) is fixedly connected on described base (1105) top, and described solid of rotation (1101) is rotatably mounted in described base (1105) top relative to described base (1105) and is positioned at described fixed cover (1102).
7. whirligig according to claim 2 (110), it is characterized in that, described rotary part also comprises transmission shaft (1106), and described transmission shaft (1106) is connected with the bottom of described solid of rotation (1101) to drive described solid of rotation (1101) to rotate.
8. whirligig according to claim 2 (110), it is characterized in that, described rotary part also comprises the rotating platform (1107) for being connected with described centre revolving joint, and described rotating platform (1107) is fixedly connected with described solid of rotation (1101) and is positioned at the top of described solid of rotation (1101).
9. whirligig according to any one of claim 1 to 8 (110), it is characterized in that, described fixing part comprises the stand joint for being connected with test-bed, and described rotary part comprises the fixed body joint for being connected with the fixed body of described centre revolving joint.
10. the reliability test of a centre revolving joint, it is characterized in that, described reliability test comprises whirligig according to any one of claim 1 to 9 (110), oil hydraulic pump (102), fictitious load (115) and the rotating driving device for driving the rotary part of described whirligig (110) to rotate, described whirligig (110) relatively rotates for making the fixed body of described centre revolving joint (111) (1111) and sleeve (1112), described oil hydraulic pump (102), described whirligig (110), described centre revolving joint (111) and described fictitious load (115) are connected to form the hydraulic pressure test loop of the reliability trial of described centre revolving joint (111).
The reliability test of 11. centre revolving joints according to claim 10, it is characterized in that, the each described fluid passage of described whirligig (110) comprises active channel and oil outlet passage, first opening of each described active channel is respectively used to be connected with the outlet of described oil hydraulic pump (102), second opening of each described active channel is respectively used to be connected with the opening of each in-line be positioned on described fixed body (1111) of described centre revolving joint (111), first opening of described oil outlet passage is used for being connected with oil extraction, second opening of described oil outlet passage is used for being connected with the opening on the oil extraction road be positioned on described fixed body (1111) of described centre revolving joint (111), the import of described fictitious load (115) is used for being connected with the opening of each in-line be positioned on described sleeve (1112) of described centre revolving joint (111), the outlet of described fictitious load is used for being connected with the opening on the oil extraction road be positioned on described sleeve (1112) of described centre revolving joint (111).
The reliability test of 12. centre revolving joints according to claim 11, it is characterized in that, described reliability test comprises the first quick union (112), and described first quick union (112) is for the first opening of the outlet and each described active channel that connect described oil hydraulic pump (102); And/or, described reliability test comprises the second quick union (113), and described second quick union (113) is for the opening being positioned at each in-line on described fixed body (1111) of the second opening and described centre revolving joint (111) that connect each described active channel; And/or, described reliability test comprises the 3rd quick union (114), and described 3rd quick union (114) is for the import of the opening being positioned at each in-line on described sleeve (1112) and described fictitious load (115) that connect described centre revolving joint (111).
The reliability test of 13. centre revolving joints according to claim 11, it is characterized in that, described fictitious load (115) comprises the load forming apparatus of the induced pressure for the formation of described centre revolving joint (111), the import of described load forming apparatus is connected with the import of described fictitious load (115), and the outlet of described load forming apparatus is connected with the outlet of described fictitious load (115).
The reliability test of 14. centre revolving joints according to claim 13, it is characterized in that, described load forming apparatus comprises the first relief valve (1151), the import of described first relief valve (1151) is connected with the import of described fictitious load (115), and the outlet of described first relief valve (1151) is connected with the outlet of described fictitious load (115).
The reliability test of 15. centre revolving joints according to claim 13, is characterized in that, described fictitious load (115) also comprises the induced pressure control gear for controlling the induced pressure change that described load forming apparatus is formed.
The reliability test of 16. centre revolving joints according to claim 15, it is characterized in that, described induced pressure control gear at least can control the second induced pressure that described load forming apparatus forms the first induced pressure and is less than described first induced pressure.
The reliability test of 17. centre revolving joints according to claim 16, it is characterized in that, described load forming apparatus comprises the first relief valve (1151), described induced pressure control gear comprises control valve and the second relief valve (1153), the import of described first relief valve (1151) is connected with the import of described fictitious load (115), the outlet of described first relief valve (1151) is connected with the outlet of described fictitious load (115), the import of described second relief valve (1153) is communicated with the spring chamber of described first relief valve (1151) by described control valve, the outlet of described second relief valve (1153) is communicated with oil extraction, wherein, described control valve for control described first relief valve (1151) spring chamber selectively with the inlet communication of described second relief valve (1153) or be communicated with oil extraction.
The reliability test of 18. centre revolving joints according to claim 17, it is characterized in that, described control valve is solenoid valve (1152), described solenoid valve (1152) comprises the first valve port, second valve port and the 3rd valve port, described first valve port is communicated with the spring chamber of described first relief valve (1151), the inlet communication of described second valve port and described second relief valve (1153), described 3rd valve port is communicated with oil extraction, described solenoid valve (1152) has the first valve position and the second valve position, in the first valve position of described solenoid valve (1152), described first valve port is communicated with described second valve port and disconnects with described 3rd valve port, in described second valve position, described first valve port disconnects with described second valve port and is communicated with described 3rd valve port.
19. according to claim 10 to the reliability test of the centre revolving joint according to any one of 18, it is characterized in that, described rotating driving device comprises oil hydraulic motor (109), described oil hydraulic motor is connected by driving oil circuit with described oil hydraulic pump (102), the output terminal of described oil hydraulic motor (109) drives with the rotary part of described whirligig (110) and is connected, and rotates to drive described rotary part under the driving of described oil hydraulic pump (102).
The reliability test of 20. centre revolving joints according to claim 19, is characterized in that, described driving oil circuit comprises the selector valve (108) of the sense of rotation for controlling described oil hydraulic motor (109).
The reliability test of 21. centre revolving joints according to claim 20, it is characterized in that, described selector valve (108) comprises the first hydraulic fluid port, second hydraulic fluid port, 3rd hydraulic fluid port and the 4th hydraulic fluid port, described first hydraulic fluid port is connected with the outlet of described oil hydraulic pump (102), described second hydraulic fluid port is communicated with oil extraction, import and export for one of described 3rd hydraulic fluid port and described oil hydraulic motor (109) and be connected, another of described 4th hydraulic fluid port and described oil hydraulic motor (109) is imported and exported and is connected, described selector valve (108) has the first valve position and the second valve position, in the first valve position of described selector valve (108), described first hydraulic fluid port is communicated with described 3rd hydraulic fluid port, described second hydraulic fluid port is communicated with described 4th hydraulic fluid port, in the second valve position of described selector valve (108), described first hydraulic fluid port is communicated with described 4th hydraulic fluid port, described second hydraulic fluid port is communicated with described 3rd hydraulic fluid port.
The reliability test of 22. centre revolving joints according to claim 19, it is characterized in that, described driving oil circuit comprises accumulator (107), and described accumulator (107) is connected between the outlet of described oil hydraulic pump (102) and described oil hydraulic motor (109).
The reliability test of 23. centre revolving joints according to claim 22, it is characterized in that, described driving oil circuit comprises one-way valve (106), described one-way valve (106) is connected between the outlet of described oil hydraulic pump (102) and described accumulator (107), and the import of described one-way valve (106) is connected with the outlet of described oil hydraulic pump (102).
The reliability test of 24. centre revolving joints according to claim 22, it is characterized in that, described driving oil circuit comprises reduction valve (105), and described reduction valve (105) is connected between the outlet of described oil hydraulic pump (102) and described accumulator (107).
25. according to claim 10 to the reliability test of the centre revolving joint according to any one of 18, it is characterized in that, described reliability test also comprises safety valve (104), and described safety valve (104) is arranged at the outlet of described oil hydraulic pump (102).
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| CN201510686088.1A CN105179381B (en) | 2015-10-21 | 2015-10-21 | The reliability test of rotating device and centre revolving joint |
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| CN201510686088.1A CN105179381B (en) | 2015-10-21 | 2015-10-21 | The reliability test of rotating device and centre revolving joint |
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| CN105179381B CN105179381B (en) | 2018-12-11 |
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