CN102720718B - Rodless internally-mounted integrated broadband dynamic cylinder - Google Patents
Rodless internally-mounted integrated broadband dynamic cylinder Download PDFInfo
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- CN102720718B CN102720718B CN201210230341.9A CN201210230341A CN102720718B CN 102720718 B CN102720718 B CN 102720718B CN 201210230341 A CN201210230341 A CN 201210230341A CN 102720718 B CN102720718 B CN 102720718B
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Abstract
The invention discloses a rodless internally-mounted integrated broadband dynamic cylinder which comprises a dynamic cylinder body, an end cover and an integrated speed-displacement sensor; a piston is arranged in the cavity of the dynamic cylinder body; an oil inlet channel and an exhaust channel which are communicated with the cavity and are respectively arranged on both sides of the piston are arranged on the dynamic cylinder body; the exhaust channel is connected with an exhaust valve; the end cover is arranged on one end of the dynamic cylinder body and seals one end of the cavity; the integrated speed-displacement sensor is arranged on the other end of the dynamic cylinder body and seals the other end of the cavity; and a connecting rod of the integrated speed-displacement sensor extends into the cavity and is connected with the piston. According to the rodless internally-mounted integrated broadband dynamic cylinder, a structure without any piston rod is adopted, so that the size of the whole dynamic cylinder is very small; and because no piston rod is adopted, the friction and the leakage at the piston rod do not exist. According to the rodless internally-mounted integrated broadband dynamic cylinder, because the integrated speed-displacement sensor is adopted and arranged on one side of the dynamic cylinder, the overall size of the dynamic cylinder is smaller.
Description
Technical field
The present invention relates to dynamic cylinder technical field, particularly a kind of without bar built-in integrated form broadband dynamic cylinder.
Background technique
Electrohydraulic control is the key element of hydraulic control system, critical role is occupied in field of hydraulic control, particularly high-power, play an important role in accurate control system, the quality of its performance is to the control accuracy of hydraulic-pressure control apparatus, the stability of system and reliability have very important effect, the direct influential system of deterioration of its fault or performance runs well, even can cause and shut down completely, and due to electrohydraulic control itself be also machine, electricity, liquid integrated complex precise control system, machinery must be met, electrically and many-sided technical requirements such as hydraulic pressure.
The static properties of electrohydraulic control, dynamic performance, frequency characteristic are the important contents of servovalve performance, and the electrohydraulic control Performance Testing Technology of domestic present stage falls behind, and level is lower, the high level research and development of serious restriction China electrohydraulic control.Wherein traditional frequency test analysis means uses analog frequency measuring and analysing meter, as: BT-6A, TIMOIO type frequency response analyzer etc.But, because it is expensive, bulky, and can not directly obtain amplitude-frequency, phase-frequency characteristic, there is no again data operation and signal handling capacity, therefore, bring inconvenience to use.
Dynamic cylinder is the Primary Component of servovalve static properties, dynamic performance, frequency characteristics measurement system, requires that its dynamic performance index will, considerably beyond the dynamic response index of tested servovalve, should be generally more than 10 ~ 15 times of servovalve frequency range.
Although the hydraulic element such as dynamic cylinder and technology thereof are widely applied in all trades and professions such as industrial and agricultural production, engineering machinery, automobile, metallurgy, Aero-Space, national defense industry, the problems such as its leakage, lightweight, are still subject to censuring of people.
Built-in and piston rod extending type two class of piston rod can be divided into by structural feature dynamic cylinder.
The feature of outlet structure is with piston rod, and piston rod portion installation position displacement sensor outside cylinder end caps and velocity transducer, and advantage is that the installation of sensor, adjustment are all more convenient, and sensor signal cable is not easy to damage in addition.Shortcoming is because the quality of piston rod assembly is comparatively large, because which limit its Dynamic response, and easily produces leakage.
The feature of built-in structure is not with piston rod, and the piston rod assembly comprising sensor is all positioned within cylinder body, and assembly quality is little, there is not the sealing friction pair between piston rod and end cap, is conducive to the raising of dynamic cylinder frequency response, can not produce leakage.But the sensor of dynamic cylinder is partial installation, and cylinder body both sides respectively distribute one, there is the defect that volume is bigger than normal equally.
Therefore, how to reduce the volume of dynamic cylinder, make its compact structure, become those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of without bar built-in integrated form broadband dynamic cylinder, to reduce the volume of dynamic cylinder, make its compact structure.
For achieving the above object, the invention provides following technological scheme:
A kind of without bar built-in integrated form broadband dynamic cylinder, comprising:
Dynamic cylinder cylinder body, is provided with piston in the cavity of described dynamic cylinder cylinder body, described dynamic cylinder cylinder body offers and is communicated with described cavity, lays respectively at oil inlet passage and the exhaust passage of described piston both sides;
Be arranged at described dynamic cylinder cylinder body one end, and the end cap of cavity one end described in shutoff;
Be arranged at the described dynamic cylinder cylinder body the other end, and the integrated form Speed-displacement sensor of the cavity the other end described in shutoff, the connecting rod of described integrated form Speed-displacement sensor stretches in described cavity, and is connected with described piston.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, described connecting rod is connected with described piston by universal shaft coupling.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, described dynamic cylinder cylinder body also offers the first exhaust passage and the second exhaust passage that are communicated with exhaust passage with described oil inlet passage respectively, described first exhaust passage and the second exhaust passage are equipped with outlet valve.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, described piston adopts clearance seal mode to be connected with the cavity wall of described dynamic cylinder cylinder body.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, described integrated form Speed-displacement sensor comprises:
Velocity transducer pedestal;
Be arranged at the velocity transducer field coil base in the center hole of described velocity transducer pedestal, described velocity transducer field coil base is wound with velocity transducer field coil, be formed with clearance groove between described velocity transducer field coil base and described velocity transducer pedestal, described velocity transducer field coil base offers fairlead and centre pilot hole;
The velocity transducer secondary wire ring support outside described velocity transducer field coil is inserted by described clearance groove in one end, and described velocity transducer secondary wire ring support is wound with velocity transducer secondary winding;
The adpting flange be connected with the outer end of described velocity transducer secondary wire ring support, the outer end of described adpting flange is provided with to be stretched in described cavity, and the described connecting rod be connected with described piston;
Be connected with described adpting flange, and be sheathed on the displacement transducer soft iron pipe outside described velocity transducer secondary wire ring support, be connected with adpting flange by rivet outside institute's displacement sensors soft iron pipe;
Be arranged at the displacement transducer excitation wire ring support outside institute's displacement sensors soft iron pipe, sensor overcoat outside institute's displacement sensors field coil seat, one end of described sensor overcoat has Wire outlet end-coer, the other end is connected with described dynamic cylinder cylinder body seal, and the lead-in wire of described velocity transducer field coil, velocity transducer secondary winding displacement transducer field coil and displacement transducer secondary winding is drawn by described Wire outlet end-coer.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, described integrated form Speed-displacement sensor also comprises:
Screw thread is installed on the wiring transition plate in described sensor overcoat;
Screw thread is arranged on described Wire outlet end-coer, the displacement transducer field coil two core socket be connected with institute displacement sensors field coil by wiring transition plate;
Screw thread is arranged on described Wire outlet end-coer, the displacement transducer secondary winding four-core socket be connected with institute displacement sensors secondary winding by wiring transition plate;
Screw thread is arranged on described Wire outlet end-coer, the velocity transducer field coil socket be connected with described velocity transducer field coil by described wiring transition plate;
Screw thread is arranged on described Wire outlet end-coer, the velocity transducer secondary winding socket be connected with described velocity transducer secondary winding by described wiring transition plate;
Be arranged on described Wire outlet end-coer, the turn-knob and the velocity transducer be connected with described wiring transition plate returns to zero.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, described Wire outlet end-coer is arranged at outside described sensor by sunk screw and puts.
Preferably, be provided with internal thread without in the dynamic cylinder of bar built-in integrated form broadband in the center hole of described velocity transducer pedestal above-mentioned, described velocity transducer field coil base is arranged in the center hole of described velocity transducer pedestal by nuts and washers.
Preferably, without in the dynamic cylinder of bar built-in integrated form broadband, the flange end side of described velocity transducer field coil base is located by nut above-mentioned, and opposite side is located by the step in described velocity transducer base central hole.
Preferably, without in the dynamic cylinder of bar built-in integrated form broadband, described velocity transducer pedestal offers pilot hole above-mentioned, and described adpting flange is provided with the first directional post inserted in described pilot hole.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, institute's displacement sensors secondary winding specifically comprises:
The displacement transducer field coil of uniform winding on institute's displacement sensors field coil seat, the one-level secondary winding that what outside was tapered be wound in outside institute's displacement sensors field coil;
The secondary secondary winding of tapered coiling outside described one-level secondary winding, and described one-level secondary winding and secondary secondary winding form columnar displacement transducer secondary winding.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, the diameter of described one-level secondary winding near described Wire outlet end-coer one end is comparatively large, and described secondary secondary winding is larger away from the diameter of described Wire outlet end-coer one end.
Preferably, without in the dynamic cylinder of bar built-in integrated form broadband, columnar institute displacement sensors secondary winding is arranged in sensor overcoat above-mentioned, and one end is located by sensor overcoat step, and the other end is located by velocity transducer pedestal flange end.
Preferably, above-mentioned without in the dynamic cylinder of bar built-in integrated form broadband, internal thread is stamped in described sensor overcoat, between the flange end that described wiring transition plate is arranged at described velocity transducer pedestal by locking nut and bakelite pad and described Wire outlet end-coer near described outlet terminal;
Be with O shape circle outside described wiring transition plate, end face has O shape to enclose;
Described wiring transition plate is connected with displacement transducer secondary winding with velocity transducer field coil, velocity transducer secondary winding, displacement transducer field coil respectively by its terminal stud;
Described wiring transition plate is near described Wire outlet end-coer, and the turn-knob that returns to zero with institute displacement sensors field coil two core socket, velocity transducer field coil socket, velocity transducer secondary winding socket, displacement transducer secondary winding four-core socket and described velocity transducer is respectively connected.
As can be seen from above-mentioned technological scheme, provided by the invention without bar built-in integrated form broadband dynamic cylinder, adopt piston-rodless structure, make whole dynamic cylinder volume very little, piston movement part quality is very light, due to piston-rodless, therefore also there is not friction and the leakage at piston rod place.Due to piston mass little (piston-rodless), the light non-resistance of cell winding, sensor connecting rod coordinates gapless with piston, and therefore, test frequency range is wide, and Frequency Modulation Inspection precision is high.This integrated form Speed-displacement sensor by adopting integrated form Speed-displacement sensor, and is placed in the side of dynamic cylinder by the present invention, makes dynamic cylinder overall volume less.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The partial sectional view without bar built-in integrated form broadband dynamic cylinder that Fig. 1 provides for the embodiment of the present invention;
The whole-cutaway view without bar built-in integrated form broadband dynamic cylinder that Fig. 2 provides for the embodiment of the present invention;
The assembly structure schematic diagram of the Speed-displacement sensor that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the Wire outlet end-coer that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 is the side view of Fig. 4;
The assembly structure schematic diagram of the velocity transducer pedestal that Fig. 6 provides for the embodiment of the present invention;
The sectional view of the velocity transducer pedestal that Fig. 7 provides for the embodiment of the present invention;
The displacement transducer secondary winding group that Fig. 8 provides for the embodiment of the present invention and soft iron assembling schematic diagram;
The displacement transducer secondary winding group that Fig. 9 provides for the embodiment of the present invention and soft iron sectional arrangement drawing;
The differential transformer equivalent circuit diagram that Figure 10 provides for the embodiment of the present invention;
The dynamic cylinder observing and controlling partial schematic block diagram that Figure 11 provides for the embodiment of the present invention;
The displacement transducer electrical schematic diagram that Figure 12 provides for the embodiment of the present invention.
Embodiment
The invention discloses a kind of without bar built-in integrated form broadband dynamic cylinder, to reduce the volume of dynamic cylinder, make its compact structure.
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.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.
Refer to Fig. 1 and Fig. 2, the partial sectional view without bar built-in integrated form broadband dynamic cylinder that Fig. 1 provides for the embodiment of the present invention; The whole-cutaway view without bar built-in integrated form broadband dynamic cylinder that Fig. 2 provides for the embodiment of the present invention.
The embodiment of the present invention provide without bar built-in integrated form broadband dynamic cylinder, comprise dynamic cylinder cylinder body 112, end cap 111 and integrated form Speed-displacement sensor 101.
Wherein, be provided with piston 115 in the cavity of dynamic cylinder cylinder body 112, dynamic cylinder cylinder body 112 offer and is communicated with cavity, lay respectively at oil inlet passage and the exhaust passage of piston 115 both sides, oil inlet passage and exhaust passage are used for being connected with tested servovalve 102.The end cap 111 of shutoff cavity one end is arranged at dynamic cylinder cylinder body 112 one end.Namely this end cap 111 blocks the cavity of dynamic cylinder cylinder body 112, in the present embodiment, realizes sealing between dynamic cylinder cylinder body 112 and end cap 111 by O type circle 108.
The integrated form Speed-displacement sensor 101 of the shutoff cavity the other end is arranged at the other end of dynamic cylinder cylinder body 112, and the connecting rod 15 of integrated form Speed-displacement sensor 101 stretches in cavity, and is connected with piston 115.In the process of piston 115 movement, pass to integrated form Speed-displacement sensor 101 by connecting rod 15, then reach the object detecting tested servovalve 102.
Provided by the invention without bar built-in integrated form broadband dynamic cylinder, adopt piston-rodless structure, make whole dynamic cylinder volume very little, piston movement part quality is very light, due to piston-rodless, therefore also there is not friction and the leakage at piston rod place.Due to piston mass little (piston-rodless), the light non-resistance of cell winding, sensor connecting rod coordinates gapless with piston, and therefore, test frequency range is wide, and Frequency Modulation Inspection precision is high.This integrated form Speed-displacement sensor by adopting integrated form Speed-displacement sensor, and is placed in the side of dynamic cylinder by the present invention, makes dynamic cylinder overall volume less.
In the present embodiment, connecting rod 15 is connected with piston 115 by universal shaft coupling 120.Concrete, universal shaft coupling 120 is by being threaded in piston 115, locked by nut 119, spring pad 118 and plain cushion 117, ensure that the connection of the connecting rod 15 of integrated form Speed-displacement sensor 101, universal shaft coupling 120 and piston 115 is without any gap, and the rotation of piston 115 in round work, due to the effect of universal shaft coupling 120, can not be transmitted on the connecting rod 15 of integrated form Speed-displacement sensor 101.
Integrated form Speed-displacement sensor 101 is inserted in the left chamber of cylinder of dynamic cylinder cylinder body 112, by bolt 123(4) connect, its sealing carries out end face seal by O type circle 106, the connecting rod 15 of integrated form Speed-displacement sensor 101 by being threaded in universal shaft coupling 120, and is locked by nut 121.
In the present embodiment, dynamic cylinder cylinder body 112 also offers the first exhaust passage and the second exhaust passage that are communicated with exhaust passage with oil inlet passage respectively, the first exhaust passage and the second exhaust passage are equipped with outlet valve 105.Outlet valve 105 is connected with dynamic cylinder cylinder body 112 by screw thread.
End cap 111 is by bolt 107(4) be fixedly mounted in the right chamber of cylinder of dynamic cylinder cylinder body 112, its sealing carries out end face seal by O type circle 108.Dynamic cylinder cylinder body 112 upper plane end (installing tested servovalve 102 face) offers the auxiliary hole of Φ 8, and two plug wires 104 are housed respectively.Dynamic cylinder cylinder body 112 is by bolt 113(4) be arranged on base 114.
Due to the frictional force between piston 115 and dynamic cylinder cylinder body 112 must very little while can not have leakage again, therefore can only lean on clearance seal between piston 115 and dynamic cylinder cylinder body 112, namely piston 115 adopts clearance seal mode to be connected with the cavity wall of dynamic cylinder cylinder body 112.Preferably, with in the cylinder chamber of the horizontally mounted dynamic cylinder cylinder body 112 of piston 115, its matching gap is 5 μ, and when dynamic cylinder cylinder body 112 is in 45° angle, piston 115 can be advisable under free skating.
In order to ensure the natural frequency (generally more than 10 times) of the natural frequency of dynamic cylinder higher than tested valve, dynamic cylinder cylinder body 112 and piston 115 select 38CrMnAl material, and the machining gap of dynamic cylinder cylinder body 112 and piston 115 is 5 μ.The natural frequency ω of dynamic cylinder
hformula is
In formula: A-piston effective area.
β-fluid effective volume modulus.
V
tthe compressible volume of-pipeline and oil hydraulic cylinder.
The quality of m-hydraulic cylinder piston and moving element.
As can be seen from above formula, the natural frequency of dynamic cylinder be improved, the quality m of the movable parts such as piston will be reduced as far as possible, reduce the compressible volume V of pipeline and oil hydraulic cylinder simultaneously
t, therefore, the present invention structurally adopts without bar type structure, and tested valve is directly installed on cylinder body.The present invention is according to (2-1) formulae discovery, and its dynamic cylinder natural frequency is approximately about 10kHz, meets the requirement of servovalve frequency test completely.
Refer to Fig. 3-Figure 10, the assembly structure schematic diagram of the Speed-displacement sensor that Fig. 3 provides for the embodiment of the present invention; The structural representation of the Wire outlet end-coer that Fig. 4 provides for the embodiment of the present invention; Fig. 5 is the side view of Fig. 4; The assembly structure schematic diagram of the velocity transducer pedestal that Fig. 6 provides for the embodiment of the present invention; The sectional view of the velocity transducer pedestal that Fig. 7 provides for the embodiment of the present invention; The displacement transducer secondary winding group that Fig. 8 provides for the embodiment of the present invention and soft iron assembling schematic diagram; The displacement transducer secondary winding group that Fig. 9 provides for the embodiment of the present invention and soft iron sectional arrangement drawing; The differential transformer equivalent circuit diagram that Figure 10 provides for the embodiment of the present invention.
The integrated form Speed-displacement sensor 101 that the embodiment of the present invention provides, comprises velocity transducer pedestal 22, velocity transducer field coil base 20, velocity transducer secondary wire ring support 38, adpting flange 16, displacement transducer soft iron pipe 19, Wire outlet end-coer 5, displacement transducer coil base 14 and sensor overcoat 26.
Wherein, velocity transducer field coil base 20 is arranged in the center hole of velocity transducer pedestal 22, velocity transducer field coil base 20 is wound with velocity transducer field coil 21, be formed with clearance groove 28 between velocity transducer field coil base 20 and velocity transducer pedestal 22, velocity transducer field coil base 20 offers centre pilot hole 30.Centre pilot hole 30 is for realizing the insertion of guide rod 36, and clearance groove 28 is for realizing the insertion of velocity transducer secondary wire ring support 38.
Velocity transducer secondary wire ring support 38 one end, by the outside of clearance groove 28 insertion speed sensor excitation coil 21, velocity transducer secondary wire ring support 38 is wound with velocity transducer secondary winding 18.
Adpting flange 16 is connected with the outer end of velocity transducer secondary wire ring support 38, and the outer end of adpting flange 16 is provided with to be stretched in described cavity, and the connecting rod 15 be connected with described piston 115, the inner is provided with guide rod 36.
Displacement transducer soft iron pipe 19 is connected with adpting flange 16, and is sheathed on the outside of velocity transducer secondary wire ring support 38.Displacement transducer coil base 14 is arranged at outside described velocity transducer pedestal 22 and institute's displacement sensors soft iron pipe 19, and institute's displacement sensors coil base 14 outer felt is wound with displacement transducer field coil 11 and displacement transducer secondary winding.
Sensor overcoat 26 is arranged at the outside of displacement transducer coil base 14, one end of sensor overcoat 26 has Wire outlet end-coer 5, the lead-in wire of velocity transducer field coil 21, velocity transducer secondary winding 18 displacement transducer field coil 11 and displacement transducer secondary winding (such as displacement transducer secondary winding lead-in wire 35, other lead-in wire does not mark label) to be connected with Wire outlet end-coer 5 by transition wire board 10 draws.
Integrated form Speed-displacement sensor 101 provided by the invention, by being formed with clearance groove 28 between velocity transducer field coil base 20 and velocity transducer pedestal 22, thinks that velocity transducer secondary wire ring support 38 provides inserting space; By adpting flange 16 and velocity transducer pedestal 22, realize the installation location of displacement transducer soft iron pipe 19, thus provide installation foundation for displacement transducer coil base 14, displacement transducer field coil 11 and displacement transducer secondary winding.Degree sensor and displacement transducer, by mutually nested mode, are integrated together by the present invention, compact structure, small volume.
As shown in Figure 4 and Figure 5, in order to optimize technique scheme further, the present invention also comprises displacement transducer field coil socket 1, displacement transducer secondary winding socket 2, velocity transducer field coil socket 27, velocity transducer secondary winding socket 4 and velocity transducer zeroing turn-knob 3.
Wherein, displacement transducer field coil socket 1(is two core sockets) be arranged on Wire outlet end-coer 5 by screw thread, be connected with displacement transducer field coil 11 transition wire board 10; Displacement transducer secondary winding socket 2(is four-core socket) be arranged on Wire outlet end-coer 5 by screw thread, be connected with displacement transducer secondary winding transition wire board 10; Velocity transducer field coil socket 27(is two core sockets) be arranged on Wire outlet end-coer 5 by screw thread, be connected with velocity transducer field coil 21 transition wire board 10; Velocity transducer secondary winding socket 4(is a core socket) be arranged on Wire outlet end-coer 5 by screw thread, be connected with velocity transducer secondary winding 18 transition wire board 10; Velocity transducer zeroing turn-knob 3 is arranged on Wire outlet end-coer 5.The present invention is arranged on Wire outlet end-coer 5 by the turn-knob 3 that returned to zero by velocity transducer, makes zeroing convenient.
Wire outlet end-coer 5 is arranged on sensor overcoat 26 by sunk screw 6, and Wire outlet end-coer 5 outer end circumference has 8 positioning holes coordinated with sunk screw 6.
As shown in Figure 6 and Figure 7, in the present embodiment, be provided with internal thread in the center hole of velocity transducer pedestal 22, velocity transducer field coil base 20 is arranged in the center hole of velocity transducer pedestal 22 by nut 24 and packing ring 23.The flange end side of velocity transducer field coil base 20 is located by nut 24, the step location of opposite side Negotiation speed sensor base 22 center hole.The lead end of velocity transducer field coil, by guide hole 31, is incorporated into the inner chamber of velocity transducer pedestal 22.
In the present embodiment, the outside of velocity transducer field coil 21 is coated with insulating paper 32.Velocity transducer pedestal 22 offers pilot hole 29, adpting flange 16 is provided with the first directional post 17 inserted in pilot hole 29, this first directional post 17 is arranged on adpting flange 16 by nut 33, the central position that guide rod 36 is positioned at adpting flange 16 is coaxial with connecting rod 15, to realize the accurate location of displacement transducer soft iron pipe 19.
As shown in Figure 8 and Figure 9, displacement transducer soft iron pipe 19 passes through rivet 34 riveting on adpting flange 16.
In the present embodiment, displacement transducer secondary winding specifically comprises one-level secondary winding 12 and secondary secondary winding 13.
Wherein, the tapered coiling of one-level secondary winding 12 is outside displacement transducer field coil 11, the tapered coiling of secondary secondary winding 13 is in the outside of one-level secondary winding 12, and one-level secondary winding 12 and secondary secondary winding 13 form columnar displacement transducer secondary winding.The diameter of one-level secondary winding 12 near Wire outlet end-coer 5 one end is comparatively large, and secondary secondary winding 13 is larger away from the diameter of Wire outlet end-coer 5 one end.Columnar displacement transducer secondary winding is arranged in sensor overcoat 26, and one end is located by sensor overcoat 26 step, and the other end is located by velocity transducer pedestal 22 flange end.
Differential transformer type linear movement pick-up adopts one-part form structure, its displacement transducer field coil 11(primary air) adopt distributed rectangular, two secondary winding (one-level secondary winding 12 and secondary secondary winding 13) adopt conical structure (i.e. section triangle distribution), reduce the Linearity error of differential output voltage, and do not increase the length of whole sensor.
Differential transformer type linear movement pick-up has life-span long, feature, the immeasurable degree system in theory such as precision is high, mechanical strength good, thermal drift is low.And displacement transducer field coil 11(primary air) adopting distributed rectangular, two secondary winding adopt Triangle-Profile.Its advantage is that the length of output accuracy and iron core has nothing to do, and the Linearity error of its output characteristics is little, and the linearity is high, can realize comparatively accurate measurement and control; Output voltage and displacement linear, the volume of product can be reduced like this, improve its linearity.
The iron core of differential transformer type linear movement pick-up is the displacement transducer soft iron pipe of thin cylindrical shell, alleviates the quality of moving part, improves the sensitivity of sensor.
By the lead bonding of integrated form Speed-displacement sensor 101 on the soldering point of wiring transition plate 10, the corresponding wiring transition plate 10 reverse side wire bonding of same color, O type circle 25 is contained in the end face of wiring transition plate 10, realize the sealing between wiring transition plate 10 and velocity transducer pedestal 22, O type circle 9 is contained in wiring transition plate 10 circumferentially, realize the sealing between wiring transition plate 10 and sensor overcoat 26, then wiring transition plate 10 is loaded in sensor overcoat 26.Velocity transducer pedestal 22 is locked by bakelite pad 8 by locking nut 7.By the lighting outlet on wiring transition plate 10, be welded on request on the female terminal of Wire outlet end-coer 5.By individual by sunk screw 16(8 for the Wire outlet end-coer 5 carefully connected the wire), be fixedly mounted on sensor overcoat 26.
Electric part
(1) working principle of velocity transducer
When cutting magnetic line movement made by coil, obtained by the law of electromagnetic induction:
e
0=NBlv (4-1)
In formula (4-1):
E
0-output end voltage (V);
The number of turn of N-coil;
B-magnetic induction intensity (T);
The Mean length (m) of l-every circle coil;
The movement velocity (m/s) of v-coil relative magnetic field.
From formula (4-1): concerning the coil determined and magnetic field, output end voltage e
0be the proportion function of movement velocity v, meet the linear requirements of sensor.
(2) working principle of displacement transducer
Refer to Fig. 8, the differential transformer equivalent circuit diagram that Fig. 8 provides for the embodiment of the present invention.
When after the impact ignoring the eddy current loss of differential transformer, hysteresis loss and distributed capacity, differential transformer can regard a desirable model as, its equivalent circuit Fig. 8.In figure: (
-primary air exciting voltage; R
1-primary air effective resistance; L
1-primary inductance; M
1, M
2mutual inductance between-primary air and secondary winding; ,
the induction electromotive force of-one-level secondary winding and secondary secondary winding;
-primary air exciting current; R
21, R
22the effective resistance of-one-level secondary winding and secondary secondary winding.
So have:
Effective value:
When iron core moves up: M
1=M+ △ M; M
2=M-△ M;
When iron core moves down:
When iron core mediates: M
1=M
2=M; U
0=0.
As can be seen here, along with the movement of iron core, the size of its output voltage changes.The change of iron core position is judged in change by measuring output voltage.
(2) working procedure of displacement transducer
Refer to Figure 11 and Figure 12.The dynamic cylinder observing and controlling partial schematic block diagram that Figure 11 provides for the embodiment of the present invention, the displacement transducer electrical schematic diagram that Figure 12 provides for the embodiment of the present invention.
The 12VDC DC supply of displacement transducer is through the input of IN+ and the IN-two ends of 7808 three-terminal voltage-stabilizing chips, and the VDD being converted to+8VDC by 7808 chips exports.After VDD inputs LMC7660IN chip ,-the VDD being converted to-8VDC exports.VDD ,-VDD are simultaneously as the working power of LM258P amplifier.After VDD inputs CD4069UBCN chip, produce AC signal signal, to differential transformer T1 excitation, the alternating signal that T1 exports is after two bridge rectifier rectifications that D1 ~ D8 forms, the filtering that input LM258P chip is formed, amplification circuit, then the d. c. voltage signal of 0 ~ 5VDC is exported, i.e. the output signal of displacement transducer.
The excitation power supply of K1 Control velocity transducer and displacement transducer and switching on and off of field coil, thus the time-sharing work both realizing.
1. the displacement transducer that the present invention describes is differential transformer type linear movement pick-up, belong to the displacement transducer of inductive type, and velocity transducer is the velocity transducer of magnetoelectric, also inductive type is belonged to, for avoiding two sensors to work and interfere with each other simultaneously, two sensors can adopt time-sharing work pattern.
2. the present invention can adopt resistor type displacement sensor to substitute differential transformer type linear movement pick-up in embodiment, and velocity transducer still adopts the velocity transducer of magnetoelectric, and two sensors can synchronous working.
3. because of the mechanical structure of resistor type displacement sensor and electrical principle simpler than differential transformer type linear movement pick-up with electrical structure, therefore not to be described in detail in the present invention, but should as object of protection of the present invention.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1., without a bar built-in integrated form broadband dynamic cylinder, it is characterized in that, comprising:
Dynamic cylinder cylinder body (112), piston (115) is provided with in the cavity of described dynamic cylinder cylinder body (112), described dynamic cylinder cylinder body (112) offers and is communicated with described cavity, lay respectively at oil inlet passage and the exhaust passage of described piston (115) both sides;
Be arranged at described dynamic cylinder cylinder body (112) one end, and the end cap (111) of cavity one end described in shutoff;
Be arranged at described dynamic cylinder cylinder body (112) the other end, and the integrated form Speed-displacement sensor (101) of the cavity the other end described in shutoff, the connecting rod (15) of described integrated form Speed-displacement sensor (101) stretches in described cavity, and is connected with described piston (115);
Described integrated form Speed-displacement sensor (101) comprising:
Velocity transducer pedestal (22);
Be arranged at the velocity transducer field coil base (20) in the center hole of described velocity transducer pedestal (22), described velocity transducer field coil base (20) is wound with velocity transducer field coil (21), be formed with clearance groove (28) between described velocity transducer field coil base (20) and described velocity transducer pedestal (22), described velocity transducer field coil base (20) offer fairlead (29) and centre pilot hole (30);
The velocity transducer secondary wire ring support (38) in described velocity transducer field coil (21) outside is inserted by described clearance groove (28) in one end, and described velocity transducer secondary wire ring support (38) is wound with velocity transducer secondary winding (18);
The adpting flange (16) be connected with the outer end of described velocity transducer secondary wire ring support (38), the outer end of described adpting flange (16) is provided with to be stretched in described cavity, and the described connecting rod (15) be connected with described piston (115);
Be connected with described adpting flange (16), and being sheathed on the displacement transducer soft iron pipe (19) in described velocity transducer secondary wire ring support (38) outside, institute's displacement sensors soft iron pipe (19) outside is connected with adpting flange (16) by rivet (34);
Be arranged at the displacement transducer excitation wire ring support (14) in institute's displacement sensors soft iron pipe (19) outside, the sensor overcoat (26) in institute's displacement sensors field coil seat (14) outside, one end of described sensor overcoat (26) has Wire outlet end-coer (5), the other end and described dynamic cylinder cylinder body (112) are tightly connected, described velocity transducer field coil (21), velocity transducer secondary winding (18), the lead-in wire of displacement transducer field coil (11) and displacement transducer secondary winding is drawn by described Wire outlet end-coer (5).
2. as claimed in claim 1 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, described connecting rod (15) is connected with described piston (115) by universal shaft coupling (120).
3. as claimed in claim 1 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, described dynamic cylinder cylinder body (112) also offers the first exhaust passage and the second exhaust passage that are communicated with exhaust passage with described oil inlet passage respectively, described first exhaust passage and the second exhaust passage are equipped with outlet valve (105).
4. as claimed in claim 1 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, described piston (115) adopts clearance seal mode to be connected with the cavity wall of described dynamic cylinder cylinder body (112).
5. as claimed in claim 1 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, described integrated form Speed-displacement sensor (101) also comprises:
Screw thread is installed on the wiring transition plate (10) in described sensor overcoat (26);
Screw thread is arranged on described Wire outlet end-coer (5), displacement transducer field coil two core socket (1) be connected with institute's displacement sensors field coil (11) by wiring transition plate (10);
Screw thread is arranged on described Wire outlet end-coer (5), displacement transducer secondary winding four-core socket (2) be connected with institute displacement sensors secondary winding by wiring transition plate (10);
Screw thread is arranged on described Wire outlet end-coer (5), the velocity transducer field coil socket (27) be connected with described velocity transducer field coil (21) by described wiring transition plate (10);
Screw thread is arranged on described Wire outlet end-coer (5), the velocity transducer secondary winding socket (4) be connected with described velocity transducer secondary winding (18) by described wiring transition plate (10);
Be arranged on described Wire outlet end-coer (5), the turn-knob (3) and the velocity transducer be connected with described wiring transition plate (10) returns to zero.
6. as claimed in claim 1 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, institute's displacement sensors secondary winding specifically comprises:
The displacement transducer field coil (11) of uniform winding in institute's displacement sensors field coil seat (14), the one-level secondary winding (12) in what outside was tapered be wound in institute's displacement sensors field coil (11) outside;
Tapered coiling is in the secondary secondary winding (13) in described one-level secondary winding (12) outside, and described one-level secondary winding (12) and secondary secondary winding (13) form cylindrical shape.
7. as claimed in claim 6 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, the diameter of described one-level secondary winding (12) near described Wire outlet end-coer (5) one end is comparatively large, and described secondary secondary winding (13) is larger away from the diameter of described Wire outlet end-coer (5) one end.
8. as claimed in claim 6 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, columnar institute displacement sensors secondary winding is arranged in sensor overcoat (26), one end is located by sensor overcoat (26) step, and the other end is located by velocity transducer pedestal (22) flange end.
9. as claimed in claim 5 without bar built-in integrated form broadband dynamic cylinder, it is characterized in that, internal thread is had in described sensor overcoat (26), between the flange end that described wiring transition plate (10) is arranged at described velocity transducer pedestal (22) by locking nut (7) and bakelite pad (8) and described Wire outlet end-coer (5) near described Wire outlet end-coer (5);
Be with O shape circle (9) outside described wiring transition plate (10), end face has the 2nd O shape circle (25);
Described wiring transition plate (10) is connected with displacement transducer secondary winding with velocity transducer field coil, velocity transducer secondary winding, displacement transducer field coil respectively by its terminal stud;
Described wiring transition plate (10) is near described Wire outlet end-coer (5), and the turn-knob (3) that returns to zero with institute's displacement sensors field coil two core socket (1), velocity transducer field coil socket (27), velocity transducer secondary winding socket (4), displacement transducer secondary winding four-core socket (2) and described velocity transducer is respectively connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210230341.9A CN102720718B (en) | 2012-07-04 | 2012-07-04 | Rodless internally-mounted integrated broadband dynamic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210230341.9A CN102720718B (en) | 2012-07-04 | 2012-07-04 | Rodless internally-mounted integrated broadband dynamic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102720718A CN102720718A (en) | 2012-10-10 |
| CN102720718B true CN102720718B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210230341.9A Expired - Fee Related CN102720718B (en) | 2012-07-04 | 2012-07-04 | Rodless internally-mounted integrated broadband dynamic cylinder |
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| CN (1) | CN102720718B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0654608A1 (en) * | 1993-11-19 | 1995-05-24 | Hygrama Ag | Method of controlling the movement of a fluid pressure cylinder and fluid pressure cylinder |
| DE19517305C1 (en) * | 1995-05-02 | 1996-09-26 | Schmidt & Co Gmbh Kranz | Dynamic pulse testing device for fluid circuit component |
| CN201133390Y (en) * | 2007-12-19 | 2008-10-15 | 中国重型机械研究院 | Cylinder valve integrated servo-vibration hydraulic cylinder device |
| CN202266538U (en) * | 2011-08-26 | 2012-06-06 | 佛山市禅城区永恒液压机械有限公司 | High-frequency response integrated servo oil cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6458866A (en) * | 1987-08-28 | 1989-03-06 | Nippon Steel Corp | Rodless cylinder |
-
2012
- 2012-07-04 CN CN201210230341.9A patent/CN102720718B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0654608A1 (en) * | 1993-11-19 | 1995-05-24 | Hygrama Ag | Method of controlling the movement of a fluid pressure cylinder and fluid pressure cylinder |
| DE19517305C1 (en) * | 1995-05-02 | 1996-09-26 | Schmidt & Co Gmbh Kranz | Dynamic pulse testing device for fluid circuit component |
| CN201133390Y (en) * | 2007-12-19 | 2008-10-15 | 中国重型机械研究院 | Cylinder valve integrated servo-vibration hydraulic cylinder device |
| CN202266538U (en) * | 2011-08-26 | 2012-06-06 | 佛山市禅城区永恒液压机械有限公司 | High-frequency response integrated servo oil cylinder |
Non-Patent Citations (1)
| Title |
|---|
| 伺服阀测试用动态缸的特性研究;王世富;《晋中学院学报》;20080630;第25卷(第3期);第10－14页 * |
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| CN102720718A (en) | 2012-10-10 |
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