CN211623855U - Deflection plate servo valve amplifier with quadrangular frustum-shaped diversion trench - Google Patents
Deflection plate servo valve amplifier with quadrangular frustum-shaped diversion trench Download PDFInfo
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- CN211623855U CN211623855U CN201922093924.1U CN201922093924U CN211623855U CN 211623855 U CN211623855 U CN 211623855U CN 201922093924 U CN201922093924 U CN 201922093924U CN 211623855 U CN211623855 U CN 211623855U
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- servo valve
- receiving hole
- valve amplifier
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- 239000002699 waste material Substances 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
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- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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Abstract
The utility model relates to a deflector servo valve amplifier with four frustum of pyramid form guiding gutters, including installing the deflector in the deflector mounting groove and from top to bottom upper cover plate, jet disk and the lower apron that sets gradually, jet disk on set up pressure notch, first receiving hole and second receiving hole respectively, a serial communication port, the deflector on set up one and be the guiding gutter of invering four frustum of pyramid forms, the bottom surface entry of this guiding gutter sets up with the blowout direction of pressure notch relatively, the top surface export sets up with first receiving hole and second receiving hole respectively relatively. Compared with the prior art, the utility model has the advantages of the energy waste of skew sensitivity, linearity are good, reduce the leading level of deflector servo valve improves the load pressure of leading level and resumes the flow, and then improves the pressure gain and the dynamic response of deflector servo valve.
Description
Technical Field
The utility model belongs to the technical field of electro-hydraulic servo valve technique and specifically relates to a deflector servo valve amplifier with quadrangular frustum form guiding gutter is related to.
Background
The electro-hydraulic servo valve has the advantages of large power-weight ratio, good dynamic characteristic and the like, and is widely applied to the industrial fields of aerospace, automatic control and the like, wherein in a two-stage or multi-stage electro-hydraulic servo valve, the deflection plate servo valve is widely concerned due to the outstanding characteristics of strong anti-pollution capacity and good manufacturability. The deflector servo valve mainly comprises a torque motor, a deflector prestage and a power stage slide valve, wherein a deflector servo valve amplifier mainly comprises a jet disc, two side cover plates and a deflector, the jet disc is provided with a structural hole similar to Chinese character 'big', a cavity area enclosed by each part of the prestage forms a prestage flow field, the upper part of the deflector servo valve amplifier is a pressure notch, the bottom of the deflector servo valve amplifier is provided with two receiving holes, when the deflector deflects in a transverse hole in the 'big' shape, the oil quantity of the oil injected from the pressure notch enters the two receiving holes is different, the pressure of the two receiving holes is different, and the two receiving holes can drive the slide valve to move when being respectively connected with two ends of a valve core of the power stage slide valve of the servo valve. As a key component of a deflector servo valve, the quality of the amplifier directly determines the performance of the overall servo valve. It is therefore of great importance to improve the performance of the servo valve amplifier of the deflector by continuous optimization of the structure.
Chinese patent US3866620A proposes several different structures for a deflector servo valve amplifier, including a double jet nozzle-square deflector structure; the double jet flow nozzle-trapezoidal deflection plate structure and the single jet flow nozzle-triangular deflection plate structure;
aiming at the problem that the structure of the traditional preamplifier of the servo valve of the deflector is complex, Chinese patent US8967179B2 designs a simpler and more compact amplifier structure, and the preamplifier of the structure has better anti-vibration characteristic and improves the dynamic response of the servo valve;
the novel deflection jet type servo valve disclosed by the Chinese patent US7290565B2 achieves the purpose of improving the performance of the servo valve by changing the structure of a feedback rod, the feedback rod is not a linear type in the traditional two-stage servo valve structure any more, but is improved into a curve type, and the flexibility of adjustable parameters of the servo valve is increased by the new structure;
in the literature, "jet-flow grade optimization design method of the deflector jet-flow servo valve" (Liu Shi Hui et al. hydropneumatic and sealing 2015(9):19-21), the parameters of the front-stage of the deflector jet-flow servo valve are optimized by adopting a genetic algorithm, the optimized sizes of a pressure notch, a V-shaped diversion trench outlet and a receiving hole inlet are respectively deduced, and the optimized structural size can effectively improve the load pressure of the front-stage of the deflector jet-flow servo valve through simulation verification;
the literature, Optial design for amplitude of jet compensator and pressure valve (SHANG G A Oxidation et al hydromechanical engineering, 2015,43(3):11-15), optimizes parameters such as receiving hole inlet width, jet disc thickness and the like, improves the steady state performance of the valve and increases the pressure gain;
in the document of single-stage jet flow deflector servo valve failure protection and simulation modeling (zhushui, hydropneumatic and sealing, 2015,35(11):27-29), a V-shaped shunt groove is respectively designed and added on two sides of a traditional V-shaped diversion groove, and limiting devices are designed on two sides of an oil return port of a jet flow disc so as to ensure that when a deflector completely deflects to one side and reaches the limiting devices, a shunt sharp edge can be just aligned to the middle of the jet flow port, so that the failure protection plays a role;
in summary, the existing deflector servo valve amplifier has few improvements to the diversion trench in the deflector, the existing diversion trench improvements mainly focus on parameter optimization on the plane of the large letter, and few innovations related to the three-dimensional structure of the diversion trench are involved. Therefore, there is a need for a new amplifier configuration that allows the fluid exiting the pressure port to be confined in three dimensions, reduces wasted energy, increases the pre-stage load pressure and recovery flow, and improves valve performance.
SUMMERY OF THE UTILITY MODEL
The objective of the present invention is to provide a servo valve amplifier with a deflection plate having quadrangular frustum-shaped guiding grooves for overcoming the drawbacks of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a deflector servo valve amplifier with four frustum of a pyramid form guiding gutters, is including installing the deflector in the deflector mounting groove and upper cover plate, jet disc and the lower apron that from top to bottom set gradually, the jet disc on set up pressure notch, first receiving hole and second receiving hole respectively, the deflector on set up one and be the guiding gutter of invering four frustum of a pyramid form, the bottom surface entry of this guiding gutter sets up with the blowout direction of pressure notch relatively, the top surface export sets up with first receiving hole and second receiving hole relatively respectively.
Preferably, the pressure slot, the deflector mounting slot, the first receiving hole and the second receiving hole together form a large-shaped structure.
Preferably, the bottom surface and the top surface of the diversion trench are both square, and two diagonals of the square on the bottom surface and the square on the top surface are mutually overlapped.
Preferably, one diagonal line of the top surface square is parallel to the plane of the deflection plate, and the other diagonal line of the top surface square is perpendicular to the plane of the deflection plate.
Preferably, the length of the diagonal line of the square of the top surface is 1.25 times of the thickness of the jet flow disk.
Preferably, the taper angle of the guide channel is 56 °.
Preferably, the pressure notch is aligned with the center of the bottom square and the top square when the deflector is not positionally offset.
Preferably, the first receiving hole and the second receiving hole are arranged symmetrically left and right with respect to the other diagonal line when the deflector plate is not positionally displaced.
Compared with the prior art, the utility model has the advantages of it is following:
after the deflection plate servo valve amplifier provided with the funnel-shaped diversion trench is adopted, the amplifier is more sensitive to the deflection of the deflection plate, when the deflection plate is in different deflection amounts, the load pressure and the recovery flow of the pre-stage amplifier are obviously improved compared with the amplifier with the V-shaped diversion trench, meanwhile, the linearity of the load pressure is better, and the amplifier has important significance for improving the pressure gain, the flow gain and the dynamic characteristic of the deflection plate servo valve.
Drawings
Fig. 1a is a schematic structural diagram of the present invention.
FIG. 1b is a cross-sectional view A-A of FIG. 1 a.
FIG. 1c is a cross-sectional view B-B of FIG. 1 a.
FIG. 1d is a partial enlarged view of the portion C in FIG. 1C.
Fig. 2 is a schematic diagram of the operation of the servo valve amplifier of the deflector, wherein fig. 2a is a schematic diagram of a partial jet flow of the deflector in a zero position, and fig. 2b is a schematic diagram of a partial jet flow of the deflector with a certain offset.
Fig. 3 is a jet flow restriction diagram of a diversion trench deflector, wherein fig. 3a is a partial jet flow diagram of a diversion trench with a V-shaped structure, and fig. 3b is a partial jet flow diagram of a square funnel-shaped diversion trench.
Fig. 4 is a schematic view of the outlet of the diversion trench divided by the middle plane of the two receiving holes under a certain displacement of the deflector plate, wherein fig. 4a is a schematic view of the outlet of the diversion trench divided by the middle plane of the first receiving hole, and fig. 4b is a schematic view of the outlet of the diversion trench divided by the middle plane of the second receiving hole.
Fig. 5 is a load pressure characteristic curve using V-shaped guide grooves and quadrangular frustum-shaped guide grooves with different deflection plate offsets.
Fig. 6 is a recovery flow characteristic curve using V-shaped guide grooves and quadrangular frustum-shaped guide grooves with different deflection plate offsets.
Figure 7 is a graph of load pressure as a function of the diagonal length of the funnel square at a deflector plate offset of 0.04 mm.
Figure 8 is a graph of the recovery flow rate as a function of the diagonal length of the square of the funnel at a deflector offset of 0.04 mm.
Wherein: 1. the jet disc comprises a jet disc body 2, an upper cover plate 3, a lower cover plate 4, a deflection plate 5, a first receiving hole 6, a second receiving hole 7, a pressure notch 8, a flow guide groove 9 and a deflection plate mounting groove.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
As shown in fig. 1a, the utility model provides a deflector servo valve amplifier with four pyramid frustum form guiding gutters, including jet disk 1, upper cover plate 2, apron 3 and deflector 4 down, the regional leading level flow field that forms of cavity that encloses between each part of amplifier, upper portion is pressure notch 7, the lower part is first receiving hole 5 and second receiving hole 6, it has the guiding gutter 8 that is the four pyramid frustum of inversion to open on the deflector 4, the entry and the export of guiding gutter 8 are all the square, two diagonals that guiding gutter 8 exported are parallel and perpendicular with the plane at jet disk 1 "big" font structure hole place respectively, the cone angle of guiding gutter 8 is about 56, the cone angle indicates the contained angle between two relative inclined planes on the four pyramid frustum. The jet disk 1 has a thickness of b1And the lengths of two diagonal lines at the outlet of the diversion trench 8 are respectively a and b.
As shown in fig. 2a, on the plane where the hole with the large-letter structure of the jet disc 1 is located, when the position of the deflector 4 is at a zero position, the liquid ejected from the pressure notch 7 of the jet disc 1 passes through the guide groove 8 of the deflector 4 and then uniformly enters the two first receiving holes 5 and the second receiving holes 6, and at this time, the load pressure and the recovery flow rate of the servo valve amplifier of the deflector 4 are both zero, as shown in fig. 2b, when the position of the deflector 4 has a certain offset, the liquid ejected from the pressure notch 7 passes through the guide groove 8 and then enters the two receiving holes, and at this time, the recovery flow rate and the load pressure of the servo valve amplifier are both non-zero.
As shown in fig. 3a, in the thickness direction of the jet flow disk 1, the width of the liquid ejected from the pressure slot 7 is continuously increased, and the width of the V-shaped diversion trench 8 is much larger than the width of the receiving hole, so that the jet flow is not restricted, and a large part of energy of the jet flow is not utilized, which causes waste.
When the deflection plate 4 is displaced x, as shown in fig. 4fWhen, the dimensionless number k is xfV (0.5a) (k is more than 0 and less than 1) the symmetrical plane of the two receiving holes divides the outlet of the flow guide groove into two parts with unequal areas, and the areas are A1And A2。
For the square flow guide groove in this example, there are:
for a common V-shaped diversion trench, the following are provided:
can know by (1) formula and (2) formula, when k increases, the utility model discloses the export area ratio of well square guiding gutter is bigger than comparing in ordinary V-arrangement guiding gutter export area ratio, and the corresponding flow difference of penetrating into two receiving holes through the guiding gutter is big more, and it is big more to change into the pressure differential in two receiving holes, and load pressure is big more promptly. Adopt promptly the utility model discloses a deflection plate servo valve amplifier of square guiding gutter is more sensitive to the displacement of deflection plate.
The following four-pyramid frustum-shaped guiding gutter with two diagonal lines equal is used as an example to demonstrate the beneficial effects of the utility model.
As shown in fig. 5, after the present invention is adopted, and a ═ b ═ 1.5b1During the process, under different deflection plates 4 offset, the load pressure of a servo valve amplifier of the deflection plate 4 is generally increased by more than 20% compared with that of the prior structure, and under partial positions, the load pressure is increased by more than 47%, so that the pressure gain of the servo valve can be effectively improved by adopting the deflection plate with the quadrangular frustum-shaped diversion trench.
As shown in fig. 6, after the present invention is adopted, and a ═ b ═ 1.5b1When the flow rate of the servo valve amplifier of the deflector is increased by more than 20% compared with the recovery flow rate of the servo valve amplifier of the deflector in the original structure under the condition of different deflection amounts of the deflector, and the load pressure is increased by more than 20% under partial positionsAnd 34% over, the method has important significance for improving the dynamic response of the servo valve.
As shown in fig. 7 and 8, when the displacement of the deflector 4 is 0.04mm, the load pressure and the recovery flow rate of the amplifier tend to increase and decrease with the increase of the diagonal length of the square outlet, because the liquid ejected from the pressure slot 7 cannot be effectively restrained by the excessively large outlet area, and when the outlet area is excessively small, the throttling effect is relatively obvious, energy loss is generated, and therefore the diagonal length of the square outlet should not be too small. As can be seen from the figure, when the diagonal length b of the square funnel is about the thickness b of the jet plate 11About 1.25 times the load pressure of the amplifier is highest.
The utility model discloses an use the inverting quadrangular frustum form guiding gutter that has two diagonals to equal to as the deflection board servo valve amplifier structure of example to analyzed its effect to promoting deflection board servo valve amplifier performance after using. It should be readily understood by those skilled in the art that the present invention is equally applicable to a deflector servo valve amplifier configuration with square funnel-shaped flow channels having unequal diagonals and is intended to be encompassed by the present claims.
Claims (8)
1. The utility model provides a deflector servo valve amplifier with four prismoid form guiding gutters, is including installing deflector (4) in deflector mounting groove (9) and upper cover plate (2), efflux dish (1) and lower apron (3) that set gradually from top to bottom, efflux dish (1) on set up pressure notch (7), first receiving hole (5) and second receiving hole (6) respectively, its characterized in that, deflector (4) on set up one and be guiding gutter (8) of four prismoid forms of inversion, the bottom surface entry of this guiding gutter (8) sets up with the blowout direction of pressure notch (7) relatively, the top surface export sets up with first receiving hole (5) and second receiving hole (6) relatively respectively.
2. The servo valve amplifier of deflector plates with quadrangular frustum shaped guide grooves according to claim 1, wherein the pressure notch (7), the deflector plate installation groove, the first receiving hole (5) and the second receiving hole (6) together form a large-shaped structure.
3. A deflector servo valve amplifier with quadrangular frustum shaped channels as claimed in claim 2, wherein the channels (8) are square in bottom and top surfaces, and the two diagonals of the square in bottom and top surfaces coincide with each other.
4. A servo valve amplifier with deflector plates provided with quadrangular frustum shaped channels according to claim 3, characterized in that one diagonal of the top square is parallel to the plane of the deflector plates (4) and the other diagonal is perpendicular to the plane of the deflector plates (4).
5. A deflector servo valve amplifier with quadrangular frustum shaped channels as claimed in claim 3 wherein the length of the top square diagonal is 1.25 times the thickness of the jet disk.
6. A deflector servo valve amplifier provided with quadrangular frustum shaped channels according to claim 3, characterised in that the cone angle of the channels (8) is 56 °.
7. A servo valve amplifier according to claim 4, characterised in that the pressure slot (7) is aligned with the centres of the bottom and top squares when the deflector (4) is not displaced.
8. A servo valve amplifier according to claim 7, wherein the first receiving opening (5) and the second receiving opening (6) are arranged symmetrically to the left and right with respect to the other diagonal, when the deflector (4) is not displaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922093924.1U CN211623855U (en) | 2019-11-28 | 2019-11-28 | Deflection plate servo valve amplifier with quadrangular frustum-shaped diversion trench |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922093924.1U CN211623855U (en) | 2019-11-28 | 2019-11-28 | Deflection plate servo valve amplifier with quadrangular frustum-shaped diversion trench |
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| CN211623855U true CN211623855U (en) | 2020-10-02 |
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| CN201922093924.1U Expired - Fee Related CN211623855U (en) | 2019-11-28 | 2019-11-28 | Deflection plate servo valve amplifier with quadrangular frustum-shaped diversion trench |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664510A (en) * | 2020-11-27 | 2021-04-16 | 北京精密机电控制设备研究所 | Pre-stage performance integration testing device of partial derivative jet servo valve |
| CN114985127A (en) * | 2022-07-15 | 2022-09-02 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for changing jet flow shape |
-
2019
- 2019-11-28 CN CN201922093924.1U patent/CN211623855U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664510A (en) * | 2020-11-27 | 2021-04-16 | 北京精密机电控制设备研究所 | Pre-stage performance integration testing device of partial derivative jet servo valve |
| CN112664510B (en) * | 2020-11-27 | 2022-12-09 | 北京精密机电控制设备研究所 | Pre-stage performance integration testing device for offset jet servo valve |
| CN114985127A (en) * | 2022-07-15 | 2022-09-02 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for changing jet flow shape |
| CN114985127B (en) * | 2022-07-15 | 2022-11-01 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for changing jet flow shape |
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Granted publication date: 20201002 |