CN203321917U - Force feedback type electro-hydraulic proportional valve driven by two-degree-of-freedom torque motor - Google Patents
Force feedback type electro-hydraulic proportional valve driven by two-degree-of-freedom torque motor Download PDFInfo
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- CN203321917U CN203321917U CN2013201936518U CN201320193651U CN203321917U CN 203321917 U CN203321917 U CN 203321917U CN 2013201936518 U CN2013201936518 U CN 2013201936518U CN 201320193651 U CN201320193651 U CN 201320193651U CN 203321917 U CN203321917 U CN 203321917U
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Abstract
A force feedback type electro-hydraulic proportional valve driven by a two-degree-of-freedom torque motor comprises a valve body part and a force torque motor, wherein the valve body part comprises a valve body, a valve element and a valve sleeve, the valve sleeve is sealed and mounted in the valve body, the valve element is rotationally, axially and glidingly mounted in the valve sleeve, and a press plate is mounted at the left end of the valve body; straight flutes for sensing oil pressure are formed in the inner surface of the valve sleeve, one end of each straight flute is communicated with a sensitive cavity, and the other ends of the straight flutes, high-pressure holes and low-pressure holes form a resistance half-bridge; an armature of the torque motor is arranged between pole shoes of an upper magnetizer and a lower magnetizer, planes of a left arm and a right arm of the armature are parallel to the tail-end planes of the pole shoes, and the armature can transversely move along the axis of the valve element while the armature drives the valve element to rotate around the axis of the valve element in a certain angle range; and spring rods are mounted on side surfaces of the left arm and the right arm of the armature.
Description
Technical field
The utility model belongs to the electro-hydraulic proportional valve in Fluid-transmission and control field, relates in particular to the force feedback type electro-hydraulic proportional valve that a kind of dual free dimension torque motor drives.
Background technique
In the practical structures of valve, consider the convenience of processing, spool generally can adopt cylindrical structure so that and the spool bore formation valve port that matches on valve body.Because the spool of sleeve valve has rotatablely moving and axial two degrees of freedom of straight line motion radially, and mutually do not interfere between these two degrees of freedom, thereby can realize respectively with these two freedom of movement the function of pilot stage and main valve, rotatablely moving of general available spool realized the function of pilot stage, and realize the opening of main valve with straight line motion, this is very large because the area gradient of valve port of slide valve can be done, and spool also is easier to coordinate with end cap etc. the so-called sensitive cavity of formation in valve opening.
Zhejiang Polytechnical University is engaged in the research of novel fluid control unit for a long time, for electric flow quantity servovalve, the new structure of 2D valve has been proposed, its hydraulic servo screw mechanism (utility model patent grant number 200910153014.6) based on unique, hydraulic pilot level and the power stage of originally separating are physically united two into one, greatly simplified the structure of valve, reduced cost, can be used to form the 2D electro-hydraulic reversing valve depending on its application difference, 2D electro-hydraulic proportional valve and 2D electrohydraulic control etc. are from low side to high-end complete series electrohydraulic control element, particularly it be used for replacing expensive and need three grades of large flow electro-hydraulic servo valves of import, form the high frequency large flow amount 2D electrohydraulic control with independent intellectual property right, engineering practical value with particular importance.
Yet in order to form the hydraulic servo screw mechanism, need on the internal surface of 2D valve valve pocket, process the spatially spiral groove, and this needs the above external import spark-erosion machine tool of three axles to process, long processing time not only, and cost of production is very high, this still can stand for the servovalve that is positioned the high-end applications occasion, but if the 2D valve arrangement is used for to Proportional valve or selector valve, just can't realize cheap large-scale production, cause product to lose the market competitiveness.
In order to overcome space spiral chute processing difficulties on original 2D valve valve pocket, cost is high, the more difficult problem that is applied to Proportional valve, Zhejiang Polytechnical University also once proposed a kind of scheme (utility application number: 201210136156.3) of 2D hydraulic booster electro-hydraulic proportion reversing valve, it is by valve body, pressure turn round coupling and for general industry the coaxial connection of proportion electro-magnet (or other linear electromechanical converter) three part form, owing to no longer adopting the design of spatially spiral groove on valve pocket, and the high low pressure hole of making on simple straight trough form and spool forms the pressure that the flowed friction half-bridge is controlled sensitive cavity, therefore need pressure to turn round coupling and the thrust of proportion electro-magnet is converted to the moment of torsion forward or backwards that acts on spool, drive valve core rotation, form the reverse feedback of difference between spool travel and straight trough and high low pressure hole masked area simultaneously, thereby form the rotation of spool and two freedom of movement of translation and realize leading control type electric-hydraulic proportion commutation (throttling) valve function, by valve core rotation, flowed friction bridge road delivery pressure is changed, and then produce static pressure actuating valve mandrel to motion.With traditional Proportional valve, compare, this 2D hydraulic booster electro-hydraulic proportion reversing valve principle advanced person still can adopt single step arrangement under high-pressure high-flow, but deficiency is to need a pressure of extra increase to turn round shaft joint, its structure and processing technology are all comparatively complicated, thereby have increased the cost of valve.
Summary of the invention
Need to press in order to overcome original 2D hydraulic booster electro-hydraulic proportion reversing valve coupling, complex structure, the problem that cost is high turned round, the electro-hydraulic proportional valve that the utility model provides a kind of dual free dimension torque motor to drive, when it has retained original 2D hydraulic booster electro-hydraulic proportion reversing valve all advantages, remove baroque pressure and turned round coupling, thereby greatly simplified the structure (whole valve only has torque motor and valve body two-part) of whole valve, reduced number of components, having reduced cost, is the ideal scheme for the composition valve.
The utility model solves the technological scheme that its technical problem adopts:
The electro-hydraulic proportional valve that the dual free dimension torque motor drives, by valve body part with as the dual free dimension torque motor of electromechanical converter, form, described valve body partly comprises valve body, spool and valve pocket, described valve pocket sealing is arranged in valve body, and described spool is rotatable also can be arranged in valve pocket axially slidably;
Valve pocket left end mounting rear cover plate, the spool left end is installed plug, and the spool right-hand member is equipped with concentric ring and right plug ring;
Spool, valve pocket, plug and back shroud coordinate the formation sensitive cavity, near on the spool land surface of sensitive cavity end, offer the high low pressure hole; Offer the straight trough of experiencing oil liquid pressure on the internal surface of valve pocket, one end and sensitive cavity communicate, and the other end and pressure hole and low pressure hole form the resistance half-bridge;
The right chamber of valve, by aperture b, communicates with oil-feed P mouth through valve core rod internal channel and aperture a;
The right-hand member of valve body is installed described torque motor, and described torque motor comprises that the parts such as armature, upper magnet case, lower magnet case, permanent magnet, spring rod, side cover plate, armature shell, coil, gland and pressing plate form; Described armature is arranged between the pole shoe of magnet case and lower magnet case, and plane, pole shoe end place becomes inclination angle with horizontal plane; Described armature is the good magnet case of flat strip structure, armature is connected with the spool external part, two arm planes, about armature are parallel with the pole shoe end plane, armature driving spool in the several angle scope when valve core axis rotates, can also be along valve core axis's direction translational;
The left and right two equal mounting spring bars in arm side of armature, the other end of spring rod connects the side cover plate at armature shell two ends, produce between the moment of elasticity of spring rod and torque motor electromagnetic torque and interact to guarantee that armature is not adsorbed by the pole shoe of upper and lower magnet case, play the centering effect simultaneously.
Offer two pairs of identical axisymmetric high low pressure holes on the spool land surface, have a pair of axisymmetric straight trough on the internal surface of valve pocket.
The area in the right chamber of valve is half of left sensitive cavity d, and when static state, the pressure of left sensitive cavity d is half of oil-feed P mouth pressure.
From left to right be provided with four shaft shoulders on described spool, wherein two middle shaft shoulders are positioned at the two ends, left and right of oil-feed P mouth.
The electro-hydraulic proportional valve that the utility model provides a kind of dual free dimension torque motor to drive, its no longer the pressure of Structure of need complexity turn round coupling, design unique two freedom of movement torque motors and replace, simultaneously axially translation and radial rotating, directly drive spool to realize the conversion between Spool rotating angle and axial displacement, form the reverse feedback of difference between spool travel and straight trough and high low pressure hole masked area simultaneously, this valve is when having retained original 2D hydraulic booster electro-hydraulic proportion reversing valve all advantages, remove baroque pressure and turned round coupling, thereby greatly simplified the structure of whole valve, whole valve only has torque motor and valve body two-part, reduced number of components, reduced cost, it is the ideal scheme for the composition valve.
The beneficial effects of the utility model are embodied in: adopt the unique two freedom of movement torque motors of design, simultaneously axially translation and radial rotating, directly drive spool to realize the conversion between Spool rotating angle and axial displacement, form the reverse feedback of difference between spool travel and straight trough and high low pressure hole masked area simultaneously, this valve is when having retained original 2D hydraulic booster electro-hydraulic proportion reversing valve all advantages, remove baroque pressure and turned round coupling, thereby greatly simplified the structure of whole valve, whole valve only has torque motor and valve body two-part, reduced number of components, reduced cost, it is the ideal scheme for the composition valve.
The accompanying drawing explanation
Fig. 1 and Figure 2 shows that structural principle schematic diagram of the present utility model;
Figure 3 shows that the integral installation figure after the dual free dimension torque motor removes pressing plate;
Figure 4 shows that the structural representation of spool 26;
Figure 5 shows that the structural representation of valve pocket 25;
Figure 6 shows that the structural representation of armature 7;
Figure 7 shows that the structural representation of magnet case 30;
Figure 8 shows that the structural representation of armature shell 12;
Figure 9 shows that the structural representation of spring rod 6;
Figure 10 shows that the structural representation of side cover plate 3;
Figure 11 shows that the structural representation of gland 34;
Figure 12 shows that the structural representation of pressing plate 33;
After Figure 13 shows that the assembling of dual free dimension torque motor, the position relationship schematic diagram between the pole shoe plane on two arm planes of armature 7 and upper magnet case 30 and lower magnet case 11;
Figure 14, Figure 15 (a)～15 (c) and Figure 16 (a)～16 (c) are the working principle schematic diagram of the electro-hydraulic proportional valve of dual free dimension torque motor driving.
It is example that the present embodiment be take the electro-hydraulic proportional valve that dual free dimension torque motor that valve core diameter is 12.5mm drives, and the utility model is described in further detail by reference to the accompanying drawings.
As depicted in figs. 1 and 2, the electro-hydraulic proportional valve that a kind of dual free dimension torque motor drives, it mainly forms by the valve body part with as the dual free dimension torque motor of electromechanical converter.Described valve body part mainly consists of valve body 24, spool 26, valve pocket 25, back shroud 21, plug 23, right plug ring 29, concentric rings 7, O RunddichtringO 22,19,18,17,16,15,14,13 and 28 etc.Spool 26, valve pocket 25, plug 23 and back shroud 21 coordinate the formation sensitive cavity, between plug and valve pocket, by O RunddichtringO 22, seal.Offer two pairs of identical axisymmetric high low pressure holes near on the spool 26 shoulder surfaces of sensitive cavity end, Figure 3 shows that a pair of high low pressure hole wherein, f is pressure hole, and c is the low pressure hole; Spool 26 is loaded in valve pocket 25, between valve pocket 25 and valve body 24, by O RunddichtringO 19,18,17,16 and 15, seal, concentric rings 7 and right plug ring 29 are housed on spool 26, between concentric rings 7 and valve pocket 25, by 14 sealings of O RunddichtringO, between right plug ring 29 and valve body 24, by O RunddichtringO 28, seal.Offer a pair of axisymmetric straight trough on the internal surface of valve pocket 25, this straight trough plays the effect of experiencing oil liquid pressure, one end and sensitive cavity communicate, the other end and high low pressure hole form the resistance half-bridge, Figure 4 shows that a straight trough e wherein, compare with the spatially spiral groove of traditional 2D valve valve pocket, this straight trough processing is simple and efficient, cost is very low, meets the requirement of Proportional valve.
As shown in Fig. 5～Figure 13, described dual free dimension torque motor mainly consists of parts such as armature, upper magnet case, lower magnet case, permanent magnet, spring rod, side cover plate, armature shell, coil, gland and pressing plates.The good magnet case that described armature 7 is flat strip structure, its two arm planes, left and right and horizontal plane need angled inclination angle, thereby realize its actuatable valve core 26 in the several angle scope when valve core axis rotates, can also be along valve core axis's direction translational; For increase itself and upper magnet case 30 and lower magnet case 11 pole shoes over against area, thereby increase output torque, reduce rotary inertia to realize the high frequency sound of dual free dimension torque motor simultaneously, during design, can suitably strengthen the length of armature 7 along the axial direction of whole valve, control its width simultaneously as far as possible; Armature 7 is realized interference fit by through hole and the spool 26 at center, thereby makes that 7 one-tenth, spool 26 and armature are as a whole realizes the dual free dimension motion.
The two arm sides, left and right of described armature 7 respectively have an aperture for two spring rods are installed; Figure 9 shows that a spring rod 6 wherein, another root spring rod and its structure are identical, and the end that spring rod is connected with armature 7 is cylindric, the end glomeration be connected with side cover plate; Described spring rod one end inserts in the aperture of two arm sides, armature 7 left and right, and the other end inserts in the center counterbore of the side cover plate 35 that is installed on armature shell 12 two ends and 3; In the working procedure of torque motor, by the moment of elasticity of spring rod and the interaction of torque motor electromagnetic torque, the corner restriction that makes armature 7 is adsorbed by the pole shoe of upper magnet case 30 and lower magnet case 11 preventing within the specific limits, spring rod also is used for limiting the corner amplitude of armature 7 simultaneously, thereby plays the effect of centering; In addition, in order to prevent the magnetic circuit short circuit, spring rod need to adopt non-magnet material to make.
Figure 8 shows that magnet case 30, lower magnet case 11 is identical with its structure.Described upper magnet case 30 and lower magnet case 11 are good magnet case and make, the inclination angle that its plane, pole shoe end place and horizontal plane are angled, this angle is identical with the inclination angle angle on two arm planes, armature 7 left and right, thereby make pole shoe end plane and two arm planes, armature 7 left and right be parallel to each other, formed a kind of special inclined-plane servo structure to realize the force feedback function of spool to torque motor.
Described armature shell 12 is made for non-magnetizer, and on it, plane has two through holes that run through with bottom surface, and these through hole two ends are semicircle, and centre is the shape of elongated rectangular shape.This through hole is for installing magnet case 30 and lower magnet case 11, and the outer surface of armature shell 12 has the groove of twice symmetry for two control coils of coiling, and right coil 5 has been shown in Fig. 2, and left coil is identical with it.
The dual free dimension torque motor relies on the polarizing magnetic field of permanent magnet and the differential stack work of controlling magnetic field of coil current, described permanent magnet has four, be arranged in twos respectively the front and rear surfaces of armature shell 12, Fig. 3 shows two permanent magnets 32 and 36 that are installed on armature shell 12 fronts, and two permanent magnets that are installed on armature shell 12 back are identical with it.
For making armature 7 and spool 26 etc. can be immersed in fluid, prevent that fluid from leaking out from armature chamber simultaneously, thereby make torque motor there is the wet type high-voltage resistance capability, respectively have two grooves for the mounting O-shaped seal ring around cylindrical pole shoe on described upper magnet case 30 and lower magnet case 11, the shape of groove is identical with pole shoe shape, thereby make magnet case 30, lower magnet case 11 form static seal with armature shell 12, prevent that the fluid in armature chamber from leaking out from the gap of magnet case and armature shell; Also have two grooves for the mounting O-shaped seal ring and be installed on two side cover plates 35 and 3 at armature shell 12 two ends, left and right, these groove two ends are semicircle, centre is the shape of elongated rectangular shape, so make side cover plate and armature shell form static seal, prevent that the fluid in armature chamber from leaking out from the two ends, left and right of armature shell 12; Have in addition a circular groove on the outer surface of armature shell 12 for mounting O-shaped seal ring 13, thereby make between torque motor and valve body, form static seal, prevent that fluid is through clearance leakage between the two.
After permanent magnet, upper magnet case, lower magnet case, armature shell, armature and mangetic core assembly and side cover plate install, whole torque motor rely on the left and right sides gland 34 and 31 and pressing plate 33 be assembled into integral body, and with four screws, torque motor partly is connected with valve body.
Working principle of the present utility model: as shown in figure 14, the right chamber of valve, by aperture b, communicates with oil-feed P mouth (system pressure) through valve core rod internal channel and aperture a, half that its area is left sensitive cavity d; The pressure of left sensitive cavity d is by the flowed friction half-bridge control that is opened in two small bow-shaped areas that a pair of high low pressure hole f on spool left end shoulder and c intersect with the straight trough e that is opened in the valve pocket internal surface and connect.During design, the area in the right chamber of valve is decided to be to half of left sensitive cavity d, if do not consider the impact of frictional force and valve port hydraulic power when static state, the pressure of left sensitive cavity d is half of inlet pressure (system pressure), poppet shaft is to keeping static balance, and the masked area of the high low pressure hole both sides crossing with straight trough e equates.
Pass into electric current in control coil, dual free dimension torque motor band movable valve plug overcomes spool and rotates until radial elastic moment and the electromagnetic torque of spring rod balance each other with counterclockwise direction (downward along parallel paper) with the hydraulic card clamping force between valve pocket, now the armature of torque motor is in a state of equilibrium, as shown in Figure 15 (a), and the meanwhile rotation of spool makes the masked area of its pressure hole f and straight trough e increase, the masked area of low pressure hole c and straight trough e reduces, so cause the pressure of left sensitive cavity to raise, and promotion spool level moves to right, and the level that has also driven the dual free dimension torque motor that moves to right of spool moves to right, thereby the air gap between torque motor armature two arms and upper and lower magnet case pole shoe is changed, wherein the air gap g1 of armature and upper magnet case pole shoe increases, the air gap g2 corresponding with lower magnet case pole shoe reduces, as shown in Figure 15 (b), the variation of air gap reduces the electromagnetic torque of dual free dimension torque motor, destroyed the state of equilibrium between spring rod radial elastic moment and electromagnetic torque, thereby cause the armature counter-rotation, turn over an angle with movable valve plug clockwise direction (along parallel paper upwards) and move axially front state until air gap g1 and air gap g2 return to spool, and the both sides that now the high low pressure hole f on spool and c get back to straight trough e, both equate with the masked area that straight trough forms, the pressure of left sensitive cavity reverts to half of inlet pressure (system pressure), spool keeps axial force balance, the output flow that the now axial displacement of spool is corresponding certain, when induced pressure is definite value, the flow of valve is directly proportional to input electrical signal, as shown in Figure 15 (c).If during original state, torque motor energising band movable valve plug is with clockwise direction (along parallel paper upwards) rotation, also can adopts and use the same method to analyze, as shown in Figure 16 (a)～16 (c).
Above-mentioned embodiment is used for explaining the utility model; rather than the utility model is limited; in the protection domain of spirit of the present utility model and claim, any modification and change that the utility model is made, all fall into protection domain of the present utility model.
Claims (4)
1. the force feedback type electro-hydraulic proportional valve that the dual free dimension torque motor drives, it is characterized in that: by valve body part with as the dual free dimension torque motor of electromechanical converter, form, described valve body partly comprises valve body, spool and valve pocket, described valve pocket sealing is arranged in valve body, and described spool is rotatable also can be arranged in valve pocket axially slidably;
Valve pocket left end mounting rear cover plate, the spool left end is installed plug, and the spool right-hand member is equipped with concentric ring and right plug ring;
Spool, valve pocket, plug and back shroud coordinate the formation sensitive cavity, near on the spool land surface of sensitive cavity end, offer the high low pressure hole; Offer the straight trough of experiencing oil liquid pressure on the internal surface of valve pocket, one end and sensitive cavity communicate, and the other end and pressure hole and low pressure hole form the resistance half-bridge;
The right chamber of valve body part, by aperture b, communicates with oil-feed P mouth through valve core rod internal channel and aperture a;
The right-hand member of valve body is installed described torque motor, and described torque motor comprises that armature, upper magnet case, lower magnet case, permanent magnet, spring rod, side cover plate, armature shell, coil, gland and pressing plate component form; Described armature is arranged between the pole shoe of magnet case and lower magnet case, and plane, pole shoe end place becomes inclination angle with horizontal plane; Described armature is the good magnet case of flat strip structure, armature is connected with the spool external part, two arm planes, about armature are parallel with the pole shoe end plane, armature driving spool in the several angle scope when valve core axis rotates, can also be along valve core axis's direction translational;
The left and right two equal mounting spring bars in arm side of armature, the other end of spring rod connects the side cover plate at armature shell two ends, produce between the moment of elasticity of spring rod and torque motor electromagnetic torque and interact to guarantee that armature is not adsorbed by the pole shoe of upper and lower magnet case, play the centering effect simultaneously.
2. the force feedback type electro-hydraulic proportional valve that dual free dimension torque motor as claimed in claim 1 drives, is characterized in that: offer two pairs of identical axisymmetric high low pressure holes on the spool land surface, have a pair of axisymmetric straight trough on the internal surface of valve pocket.
3. the force feedback type electro-hydraulic proportional valve that dual free dimension torque motor as claimed in claim 2 drives is characterized in that: the area in the right chamber of valve body part is half of sensitive cavity d, and when static state, the pressure of sensitive cavity d is half of oil-feed P mouth pressure.
4. the force feedback type electro-hydraulic proportional valve that dual free dimension torque motor as claimed in claim 3 drives is characterized in that: from left to right be provided with four shaft shoulders on described spool, wherein two middle shaft shoulders are positioned at the two ends, left and right of oil-feed P mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201936518U CN203321917U (en) | 2013-04-16 | 2013-04-16 | Force feedback type electro-hydraulic proportional valve driven by two-degree-of-freedom torque motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201936518U CN203321917U (en) | 2013-04-16 | 2013-04-16 | Force feedback type electro-hydraulic proportional valve driven by two-degree-of-freedom torque motor |
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| CN203321917U true CN203321917U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013201936518U Expired - Fee Related CN203321917U (en) | 2013-04-16 | 2013-04-16 | Force feedback type electro-hydraulic proportional valve driven by two-degree-of-freedom torque motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233934A (en) * | 2013-04-16 | 2013-08-07 | 浙江工业大学 | Force feedback type electro-hydraulic proportional valve driven by two-freedom-degree torque motor |
| CN106685150A (en) * | 2016-12-07 | 2017-05-17 | 东莞市骏能电机有限公司 | Dual-voltage powered standard permanent magnet synchronous motor and automatic production technology thereof |
-
2013
- 2013-04-16 CN CN2013201936518U patent/CN203321917U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233934A (en) * | 2013-04-16 | 2013-08-07 | 浙江工业大学 | Force feedback type electro-hydraulic proportional valve driven by two-freedom-degree torque motor |
| CN106685150A (en) * | 2016-12-07 | 2017-05-17 | 东莞市骏能电机有限公司 | Dual-voltage powered standard permanent magnet synchronous motor and automatic production technology thereof |
| CN106685150B (en) * | 2016-12-07 | 2023-06-02 | 东莞市骏能电子科技有限公司 | Double-voltage power supply standard permanent magnet synchronous motor and automatic production method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20170416 |