CN110529466B - Digital servo valve debugging device - Google Patents
Digital servo valve debugging device Download PDFInfo
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- CN110529466B CN110529466B CN201910823267.3A CN201910823267A CN110529466B CN 110529466 B CN110529466 B CN 110529466B CN 201910823267 A CN201910823267 A CN 201910823267A CN 110529466 B CN110529466 B CN 110529466B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/007—Simulation or modelling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The embodiment of the invention provides a digital servo valve debugging device, which comprises: the device comprises an elastic force loading mechanism, an elastic force measuring mechanism, a position measuring mechanism, a driving mechanism and a fixed rack; the elastic force loading mechanism, the elastic force measuring mechanism, the position measuring mechanism and the driving mechanism are arranged on the fixed rack, the elastic force loading mechanism is connected with the elastic force measuring mechanism, the elastic force measuring mechanism is connected with one end of the valve core of the tested servo valve, and the other end of the valve core of the tested servo valve is connected with the driving mechanism. The embodiment of the invention provides a digital servo valve debugging device, and aims to provide a load simulation device which can apply adjustable elastic force to a valve core when detecting the performance of the valve core of a servo valve after movement and micro deformation under a load condition.
Description
Technical Field
The invention relates to the technical field of load simulators, in particular to a digital servo valve debugging device.
Background
The load simulator loads the valve core of the servo valve to move based on the driving of the servo motor, and applies load moment through a load simulation device.
The digital servo valve driving mechanism is a power and control assembly in the digital servo valve, and during work, the digital servo valve overcomes resistance borne by the movement of the spool valve through the driving mechanism, accurately controls the movement of the spool valve and further adjusts output flow. The digital servo valve accurately controls the position of the spool of the slide valve through the driving mechanism, so as to control the flow output, and the accuracy of the output displacement of the driving mechanism directly influences the flow output quality of the digital servo valve. The digital servo valve spool valve displacement has the characteristics of high resolution, good repeatability, quick response and the like. The maximum stroke of the existing large-flow digital servo valve is only several millimeters, the resolution order of magnitude requirement of the existing large-flow digital servo valve reaches 0.01mm, and the error tolerance is less than 0.5 percent; the full amplitude step signal response time is less than 10 ms.
The servo valve core performance accuracy test loading device is used for detecting the performance of a tested flexible rod under the condition of elastic load of the servo valve core; the reliability of the servo valve core after micro deformation is detected by applying different elastic load working conditions, and the performance of the high-flow digital servo valve is further improved. At present, the existing load simulator can not realize accurate measurement of valve core displacement when applying axial force.
Disclosure of Invention
The embodiment of the invention provides a digital servo valve debugging device, which overcomes the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme.
A digital servo valve debugging apparatus comprising: the device comprises an elastic force loading mechanism, an elastic force measuring mechanism, a position measuring mechanism, a driving mechanism and a fixed rack;
the elastic force loading mechanism, the elastic force measuring mechanism, the position measuring mechanism and the driving mechanism are arranged on the fixed rack, the elastic force loading mechanism is connected with the elastic force measuring mechanism, the elastic force measuring mechanism is connected with one end of the valve core of the tested servo valve, and the other end of the valve core of the tested servo valve is connected with the driving mechanism;
the position measuring mechanism includes: first displacement sensor, second displacement sensor, first displacement sensor support, second displacement sensor support, first sensitization board and second sensitization board, first displacement sensor is fixed in first displacement sensor support top, second displacement sensor is fixed in second displacement sensor support top, first sensor support with second displacement sensor support locates the fixed rack top, first sensor support with second displacement sensor support is located respectively the both sides of being tried the servo valve case, first sensitization board and second sensitization board are fixed in respectively on the servo valve case is tried.
Preferably, the valve core of the tested servo valve is connected with the driving mechanism through a valve core connecting piece.
Preferably, the first photosensitive plate and the second photosensitive plate are respectively fixed to the valve core of the tested servo valve through photosensitive plate connecting pieces, and the photosensitive plate connecting pieces include: photosensitive plate connecting piece and No. 2 photosensitive plate connecting pieces, No. 1 photosensitive plate connecting piece with the photosensitive plate passes through bolted connection, all have the same semi-circular through-hole of radius on No. 1 photosensitive plate connecting piece and No. 2 photosensitive plate connecting pieces, 2 individual semi-circular through-holes are placed relatively and are formed circular through-hole through the bolt-up, the servo valve case of being tried passes through the through-hole with the photosensitive plate connecting piece is connected.
Preferably, the elastic force loading mechanism includes: the elastic plate fixing part comprises an elastic plate, 2 elastic plate fixing parts and 2 elastic plate supports, wherein two ends of the elastic plate are respectively fixed between the elastic plate fixing part and the elastic plate supports, the 2 elastic plate fixing parts are respectively and fixedly connected with the 2 elastic plate supports, the 2 elastic plate supports are oppositely arranged on the fixed rack, the 2 elastic plate supports are in sliding connection with the fixed rack, and the rigidity of the elastic plate is adjustable;
the elastic plate is connected with the elastic force measuring mechanism through an elastic plate connecting piece.
Preferably, the elastic force measuring mechanism includes: the force sensor comprises a force sensor, a first linear shaft sleeve, a second linear shaft sleeve, a first linear bearing support, a second linear bearing support, a first linear bearing and a second linear bearing, wherein the first linear bearing support and the second linear bearing support are fixed above the fixed rack through bolts;
the first linear bearing is connected with the elastic plate connecting piece and the force sensor through the first force sensor connecting piece respectively, and the second linear bearing is connected with the force sensor and the tested servo valve core through the second force sensor connecting piece respectively.
Preferably, the stationary gantry comprises: the device comprises a base, a cuboid strip centering strip and an inverted T-shaped groove, wherein the cuboid strip centering strip is arranged above the base in a protruding mode, and the inverted T-shaped groove is perpendicular to the centering strip;
the elastic plate support is connected with the inverted T-shaped groove in a sliding mode through a T-shaped nut, and the distance between the elastic plate supports is adjusted to adjust the rigidity of the elastic plate;
the first linear bearing support and the second linear bearing support are arranged above the centering strip, grooves are formed in the bottom of the first linear bearing support and the bottom of the second linear bearing support, and the grooves are in interference fit with the centering strip.
Preferably, the device further comprises a driving mechanism support, the driving mechanism support is fixed above the fixed rack, and the driving mechanism is fixedly connected with the driving mechanism support.
Preferably, the elastic plate fixing piece and the elastic plate support are respectively provided with a groove capable of centering, and the width of the groove is smaller than the thickness of the elastic plate, so that the elastic plate is fixed by the groove, and the elastic plate is prevented from moving.
Preferably, the elastic plate fixing member or the elastic plate support is provided with a groove, and the width of the groove is smaller than the thickness of the elastic plate, so that the groove fixes the elastic plate and prevents the elastic plate from moving.
Preferably, the elastic plate is made of an elastic material 60Si2 CrVA.
According to the technical scheme provided by the embodiment of the invention, the embodiment of the invention provides the digital servo valve debugging device, the axial force is applied by the driving mechanism to load the valve core of the servo valve, and the elastic load moment is applied at the same time, so that the displacement of the valve core can be accurately measured while the elastic force is loaded and continuously adjustable; in addition, with sensitization board and servo valve case link firmly, measure the displacement of receiving board and realize the measurement to servo valve case displacement and deformation, this kind of mounting means has eliminated the unstable condition of connection in the test procedure, improves the experiment effect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a digital servo valve debugging apparatus according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a digital servo valve debugging apparatus according to an embodiment of the present invention;
fig. 3 is a schematic top view of a digital servo valve debugging apparatus according to an embodiment of the present invention;
fig. 4 is a schematic front view of a digital servo valve debugging apparatus according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view B-B of a digital servo valve debugging apparatus according to an embodiment of the present invention;
fig. 6 is a schematic detail view at a point a of a digital servo valve debugging apparatus according to an embodiment of the present invention;
fig. 7 is a schematic diagram of details at b of a digital servo valve debugging apparatus according to an embodiment of the present invention;
fig. 8 is a schematic view of a connecting member of a light-sensing plate according to an embodiment of the present invention;
fig. 9 is a schematic view of a connecting member of a light-sensing plate according to an embodiment of the invention.
Reference numerals:
1. an elastic force loading mechanism; 11. an elastic plate; 12. an elastic plate fixing member; 13. an elastic plate fixing member; 14. an elastic plate holder; 15. an elastic plate holder;
2. an elastic force measuring mechanism; 21. a force sensor; 22. a first linear bushing; 23. a second linear shaft sleeve; 24. a first linear bearing support; 25. a second linear bearing support; 26. a first linear bearing; 27. a second linear bearing 27;
3. a position measuring mechanism; 31. a first laser displacement sensor; 32. a second laser displacement sensor; 33. a first displacement sensor mount; 34. a second displacement sensor support; 35. a first light-sensing plate; 36. a second light-sensing plate; 37. a light-sensing plate connecting member; 371. a No. 1 photosheet connecting piece; 372. a No. 2 photosheet connecting piece;
4. a drive mechanism; 41. a drive mechanism support;
5. a fixed rack; 51. a base; 52. centering the middle strip; 53. an inverted T-shaped groove; 54. a groove;
6. an elastic plate connecting member; 7. a first force sensor attachment; 8. a second force sensor link;
9. a tested servo valve core; 10. a spool connector.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
The embodiment of the invention provides a digital servo valve debugging device, and aims to provide a load simulation device which can apply adjustable elastic force to a valve core when detecting the performance of the valve core of a servo valve after movement and micro deformation under a load condition.
A digital servo valve debugging apparatus as shown in fig. 1 to 5, comprising: the device comprises an elastic force loading mechanism 1, an elastic force measuring mechanism 2, a position measuring mechanism 3, a driving mechanism 4, a driving mechanism bracket 41 and a fixed rack 5. The elastic force loading mechanism 1, the elastic force measuring mechanism 2 and the position measuring mechanism 3 are arranged on the fixed rack 5, the driving mechanism 4 is fixedly connected with the driving mechanism support 41, and the driving mechanism support 41 is fixed on the fixed rack 5 through bolts. The elastic force loading mechanism 1 is connected with the elastic force measuring mechanism 2, the elastic force measuring mechanism 1 is in threaded connection with one end of the tested servo valve core 9, the other end of the tested servo valve core 9 is in threaded connection with the driving mechanism 4 through a valve core connecting piece 10, and two ends of the tested servo valve core 9 are locked through locking nuts.
The stationary stage 5 includes: a base 51, a centering bar 52 and an inverted T-shaped groove 53. A groove 54 is formed in the central axis of the base 51, the centering strip 52 is a cuboid strip, and the centering strip is convexly arranged on the axis of the base 51 and is in interference fit with the groove 54. The base 51 is provided with an inverted T-shaped groove 53 for sliding connection with the elastic force loading mechanism 1, and the inverted T-shaped groove 53 is perpendicular to the centering bar 52.
The elastic force loading mechanism 1 includes: an elastic plate 11, elastic plate holders 12 and 13, and elastic plate holders 14 and 15. The elastic plate 11 is connected with the elastic force measuring mechanism 2 through an elastic plate connecting piece 6, as shown in fig. 6, one end of the elastic plate connecting piece 6 penetrates through the elastic plate 11 and is locked by a locking nut, and the other end is connected with the elastic force measuring mechanism 2. The elastic plate 11 is rectangular and is made of an elastic material 60Si2CrVA, so that good performance of the elastic plate is guaranteed. The elastic plate fixing parts 12 and 13 and the elastic plate brackets 14 and 15 are respectively provided with a centering groove, two ends of the elastic plate 11 are respectively placed in the grooves for fixing, and the width of the groove is smaller than the thickness of the elastic plate, so that the elastic plate is prevented from moving. The elastic plate holder 12 and the elastic plate bracket 14 are connected by a bolt, and the elastic plate holder 13 and the elastic plate bracket 15 are connected by a bolt. The elastic plate brackets 14 and 15 are inverted T-shaped and are respectively positioned on two sides of the centering strip and are oppositely arranged. The bases of the elastic plate brackets 14 and 15 are respectively connected with the inverted T-shaped groove 53 in a sliding way through T-shaped nuts, and the rigidity of the spring plate is adjusted by adjusting the distance between the elastic plate brackets according to the required elastic force.
The key for realizing the load simulation of the driving mechanism is the loading form and the loading precision of the load force. According to past design experience, the elastic force of the mechanical load simulator is realized by the deformation of the spring steel plate.
The magnitude of the elastic force in the embodiment is related to the material and the size of the elastic plate, and the allowable bending normal stress [ sigma ] is based on the mechanical property of 60Si2CrVA]620.7MPa, allowable shear stress [ tau ]]372.4MPa, modulus of elasticity E2.06 x 105Mpa。
The elastic plate is bent by transverse force, and when the ratio of the span L to the cross section height h is larger than or equal to 5, the elastic plate is suitable for pure bending. Therefore, it is not only easy to use
From the maximum normal stress, equation (1) is calculated:
and maximum shear stress calculation formula (2):
in the formula WZThe bending section coefficient is b, h is the cross section width and height respectively, and A is the cross section area.
The specifications of the elastic sheet selected in this example are b-5 mm, h-27 mm, L-185 mm, b-5 mm, h-27 mm, and L-124 mm, respectively. According to the required rated elastic loading force F being 1200N, the maximum normal stress and the maximum shearing stress can be calculated, and the requirements can be met.
The elastic force measuring mechanism 2 includes: the force sensor 21, the first linear bearing housing 22, the second linear bearing housing 23, the first linear bearing housing 24, the second linear bearing housing 25, the first linear bearing 26 and the second linear bearing 27. The first linear bearing 26 is connected with the elastic plate connecting piece 6 and the force sensor 21 through the first force sensor connecting piece 7 respectively, and the joint of the first force sensor connecting piece 7 and the elastic plate connecting piece 6 is locked through a locking nut, so that the screw rod is prevented from loosening in the axial movement. The second linear bearing 27 is respectively connected with the force sensor 21 and the tested servo valve spool 9 through the second force sensor connecting piece 8, and the joint of the second force sensor connecting piece 8 and the tested servo valve spool 9 is locked through a locking nut. The first linear bearing support 24 and the second linear bearing support 25 are i-shaped supports and are respectively arranged above the centering bar 52, grooves are formed in the bottom of the first linear bearing support 24 and the bottom of the second linear bearing support 25 and are in interference fit with the centering bar, and the first linear bearing support 24 and the second linear bearing support 25 are further fixedly connected with the base 51 through bolts. The first linear bearing 26 is fitted in the first linear bearing housing 22, and the first linear bearing housing 22 and the first linear bearing bracket 24 are fixedly connected by bolts. The second linear bearing 27 is fitted in the second linear bearing housing 23, and the second linear bearing housing 23 is fixedly connected to the second linear bearing support 25 by bolts.
The position measuring mechanism 3 includes: a first laser displacement sensor 31, a second laser displacement sensor 32, a first displacement sensor support 33, a second displacement sensor support 34, a first light-sensing plate 35, a second light- sensing plate 36 and 2 light-sensing plate connectors 37. The first laser displacement sensor 31 is connected with the first displacement sensor support 33 through bolts and nuts, and the second laser displacement sensor 32 is connected with the second displacement sensor support 34 through bolts and nuts. The first sensor bracket 33 and the second displacement sensor bracket 34 are i-shaped brackets and are respectively fixed above the base 51 through bolts, the first sensor bracket 33 and the second displacement sensor bracket 34 are respectively located at two sides of the valve core 9 of the servo valve to be tested, and the first light sensing plate 35 and the second light sensing plate 36 are respectively fixed on the valve core 9 of the servo valve to be tested through light sensing plate connecting pieces 37. The distance between the laser displacement sensor and the light-sensitive plate is adjustable, and a proper distance is set to meet the measurement requirement.
As shown in fig. 7 to 9, the plate connecting member 37 includes: number 1 plate connector 371, and number 2 plate connector 372. All have the same semi-circular through-hole of radius on No. 1 photosensitive web connecting piece 371 and No. 2 photosensitive web connecting pieces 372, 2 semi-circular through-holes are placed relatively and are formed circular through-hole through the bolt-up, and the convenience is coaxial and the laminating with the case. The valve core 9 of the tested servo valve is connected with the photosensitive plate connecting piece 37 through a circular through hole, and the No. 1 photosensitive plate connecting piece 371 is further connected with the photosensitive plate through a bolt.
This embodiment provides a digital servo valve debugging device, and its test procedure is as follows: the computer controls the driving mechanism to drive the whole machine to move, the elastic plate in the elastic force loading mechanism is stressed and bent to apply elastic force to the valve core of the tested servo valve, the deformation of the valve core of the tested servo valve is detected through the laser displacement sensor, the elastic force is detected through the force sensor, and the performance of the valve core of the tested servo valve is measured through the collection of the displacement and the elastic force.
In conclusion, the invention has the following beneficial effects:
1. the displacement and deformation of the valve core of the servo valve to be measured adopt the laser displacement sensor, and compared with a stay wire displacement sensor, a magnetostrictive displacement sensor, a grating displacement sensor and a differential displacement sensor in the past research, the laser displacement sensor has better measurement precision which can reach 1 mu m.
2. In the measurement principle, the position of the reflected light of the RS-CMOS is detected using a triangulation method, and the position of the object to be measured can be measured by detecting the change. The photosensitive plate is fixedly connected with the servo valve core, the displacement of the photosensitive plate is measured to realize the measurement of the displacement and the deformation of the servo valve core, the instable connection condition in the test process is eliminated by the installation mode, and the experiment effect is improved.
3. The elastic force loading mechanism is provided with the T-shaped nut, and the number of parts can be reduced and the processing cost can be saved by changing the position of the T-shaped nut when the length of the elastic plate is changed. Considering the fixing mode of the elastic adjusting device and the connecting mechanism thereof in the servo valve structure, the fixing mode of the elastic adjusting device and the connecting mechanism thereof in the actual mechanical load simulator conforms to the real situation, the fixing clearance between the elastic adjusting device and the matching connecting mechanism thereof should be reduced as much as possible, the device carries out positioning and fastening through the elastic plate clamping mode, and the clearance at the connecting position is eliminated to the maximum extent.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A digital servovalve debugging apparatus comprising: the device comprises an elastic force loading mechanism, an elastic force measuring mechanism, a position measuring mechanism, a driving mechanism and a fixed rack;
the elastic force loading mechanism, the elastic force measuring mechanism, the position measuring mechanism and the driving mechanism are arranged on the fixed rack, the elastic force loading mechanism is connected with the elastic force measuring mechanism, the elastic force measuring mechanism is connected with one end of the valve core of the tested servo valve, and the other end of the valve core of the tested servo valve is connected with the driving mechanism;
the position measuring mechanism includes: the servo valve testing device comprises a first displacement sensor, a second displacement sensor, a first displacement sensor support, a second displacement sensor support, a first light sensing plate and a second light sensing plate, wherein the first displacement sensor is fixed above the first displacement sensor support;
the elastic force measuring mechanism includes: the force sensor comprises a force sensor, a first linear shaft sleeve, a second linear shaft sleeve, a first linear bearing support, a second linear bearing support, a first linear bearing and a second linear bearing, wherein the first linear bearing support and the second linear bearing support are fixed above the fixed rack through bolts; the first linear bearing is connected with the elastic plate connecting piece and the force sensor through the first force sensor connecting piece respectively, and the second linear bearing is connected with the force sensor and the tested servo valve core through the second force sensor connecting piece respectively.
2. The apparatus of claim 1, wherein the subject servo valve spool is connected to the drive mechanism by a spool connection.
3. The apparatus according to claim 1 or 2, wherein the first and second photosensitive plates are fixed to the spool of the servo valve under test by photosensitive plate connection members, respectively, the photosensitive plate connection members comprising: photosensitive plate connecting piece and No. 2 photosensitive plate connecting pieces, No. 1 photosensitive plate connecting piece passes through bolted connection with the photosensitive plate, all have the same semi-circular through-hole of radius on No. 1 photosensitive plate connecting piece and No. 2 photosensitive plate connecting pieces, 2 individual semi-circular through-holes are placed relatively and are formed circular through-hole through the bolt-up, the servo valve case of being tried passes through circular through-hole with the photosensitive plate connecting piece is connected.
4. The apparatus of claim 3, wherein the spring force loading mechanism comprises: the elastic plate fixing part comprises an elastic plate, 2 elastic plate fixing parts and 2 elastic plate supports, wherein two ends of the elastic plate are respectively fixed between the elastic plate fixing part and the elastic plate supports, the 2 elastic plate fixing parts are respectively and fixedly connected with the 2 elastic plate supports, the 2 elastic plate supports are oppositely arranged on the fixed rack, the 2 elastic plate supports are in sliding connection with the fixed rack, and the rigidity of the elastic plate is adjustable;
the elastic plate is connected with the elastic force measuring mechanism through an elastic plate connecting piece.
5. The apparatus of claim 4, wherein the stationary gantry comprises: the device comprises a base, a cuboid strip centering strip and an inverted T-shaped groove, wherein the cuboid strip centering strip is arranged above the base in a protruding mode, and the inverted T-shaped groove is perpendicular to the centering strip;
the elastic plate support is connected with the inverted T-shaped groove in a sliding mode through a T-shaped nut, and the distance between the elastic plate supports is adjusted to adjust the rigidity of the elastic plate;
the first linear bearing support and the second linear bearing support are arranged above the centering strip, grooves are formed in the bottom of the first linear bearing support and the bottom of the second linear bearing support, and the grooves are in interference fit with the centering strip.
6. The apparatus of claim 1, further comprising a drive mechanism support secured above the stationary gantry, the drive mechanism being fixedly coupled to the drive mechanism support.
7. The apparatus of claim 4, wherein the spring plate holder and the spring plate bracket are respectively provided with a groove capable of centering, and the width of the groove is smaller than the thickness of the spring plate, so that the groove holds the spring plate to prevent the movement of the spring plate.
8. The device of claim 4, wherein the spring plate holder or spring plate support is provided with a groove, the width of the groove being less than the thickness of the spring plate, such that the groove holds the spring plate against movement.
9. The device of claim 4, wherein the spring plate is machined from a spring material 60Si2 CrVA.
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| SU821775A1 (en) * | 1979-06-29 | 1981-04-15 | Московский Автомобильный Завод Им.И.A.Лихачева (Производственноеобъединение Зил) | Stand for testing hydraulic units |
| JP2005304298A (en) * | 2005-04-14 | 2005-10-27 | Smc Corp | Electromagnetic actuator |
| CN102954064A (en) * | 2011-08-23 | 2013-03-06 | 上海宝钢设备检修有限公司 | System and method for detecting force motor transitional motion type three-way servo valve |
| CN102913553A (en) * | 2012-10-22 | 2013-02-06 | 浙江工业大学 | Multi-layer air floatation hanging device capable of performing two-dimensional friction-free long-distance movement |
| CN204649414U (en) * | 2015-05-22 | 2015-09-16 | 吉林省汽车零部件研发中心有限公司 | Automobile Clutch Plate Spring suppresses load testing machine |
| CN105841647A (en) * | 2016-03-22 | 2016-08-10 | 华中科技大学 | Electro-hydraulic servo valve overlap value measuring device and measuring method thereof |
| CN106545549A (en) * | 2016-11-24 | 2017-03-29 | 北京交通大学 | Servo valve stability experiment loading unit |
| CN108506257A (en) * | 2018-02-07 | 2018-09-07 | 同济大学 | A kind of threeway jet pipe servo valve jet axis track debugging apparatus and method |
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| CN110529466A (en) | 2019-12-03 |
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