CN114440099A - Wall-mounted vibration reduction fixing device of control instrument equipment for engine - Google Patents
Wall-mounted vibration reduction fixing device of control instrument equipment for engine Download PDFInfo
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- CN114440099A CN114440099A CN202111538952.5A CN202111538952A CN114440099A CN 114440099 A CN114440099 A CN 114440099A CN 202111538952 A CN202111538952 A CN 202111538952A CN 114440099 A CN114440099 A CN 114440099A
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- engine
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- 230000009467 reduction Effects 0.000 title description 10
- 239000006096 absorbing agent Substances 0.000 claims abstract description 75
- 230000035939 shock Effects 0.000 claims abstract description 65
- 238000013016 damping Methods 0.000 claims abstract description 46
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 59
- 239000002184 metal Substances 0.000 claims description 59
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 229920001967 Metal rubber Polymers 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a wall-mounted vibration damping fixing device of control instrument equipment for an engine, which solves the problem that the normal work of the control instrument equipment is influenced by directly mounting the control instrument equipment on the engine in the prior art. The fixing device comprises an M-shaped bracket, 4 vibration absorbers and 4 connecting components; the M-shaped bracket comprises 4 connecting lugs, a lower supporting plate, an upper positioning plate arranged above the lower supporting plate and 4 connecting beams arranged between the lower supporting plate and the upper positioning plate; the 4 connecting beams are sequentially connected end to form an M-shaped frame; the lower supporting plate and the upper positioning plate are provided with connecting pieces; 2 connecting lugs are arranged on the bottom surface of the lower supporting plate side by side, the other 2 connecting lugs are arranged on the rear surface of the upper positioning plate side by side, and the distance between the 2 connecting lugs on the upper positioning plate is smaller than that between the 2 connecting lugs on the lower supporting plate; the 4 shock absorbers are respectively arranged in the shock absorber mounting holes of the 4 connecting lugs; 4 coupling assembling one end sets up respectively on 4 shock absorbers, and the other end is used for being connected with the engine.
Description
Technical Field
The invention relates to a fixing device for control instrument equipment, in particular to a wall-mounted vibration reduction fixing device for control instrument equipment for an engine.
Background
The engine is one of the areas with the worst rocket vibration and starting impact environment, and generally, control instrument equipment for controlling the engine to work is arranged in an instrument chamber, the instrument chamber is generally large in space and mild in environment, and the high-frequency vibration and starting impact magnitude is small. With the development of the aerospace propulsion technology, the engine has new requirements of health detection, intellectualization, rapidness and controllability, so that control instruments and equipment are required to be directly installed on the engine, but the engine can generate large starting impact in the starting process, high-magnitude high-frequency vibration is also generated in rated work, and the working environment is severe. If the control instrument and equipment are directly installed on the engine, the normal operation of the control instrument and equipment is influenced by starting impact and high-frequency vibration, even the failure of the box structure of the equipment, electronic components and the like is caused, and the success or failure of the launching of the whole spacecraft is directly related.
Disclosure of Invention
The invention provides a wall-mounted vibration reduction fixing device for control instrument equipment for an engine, aiming at solving the technical problem that the normal work of the control instrument equipment is seriously influenced by high-frequency vibration and high impact of the engine when the control instrument equipment is directly installed on the engine in the prior art.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a wall-hanging damping fixing device of control instrument equipment for an engine is characterized in that: the device comprises an M-shaped bracket, 4 vibration dampers and 4 connecting assemblies;
the M-shaped bracket comprises 4 connecting lugs, a lower supporting plate, an upper positioning plate arranged above the lower supporting plate in parallel and 4 connecting beams arranged between the lower supporting plate and the upper positioning plate;
the length of the lower supporting plate is greater than that of the upper positioning plate;
two ends of each connecting beam are respectively connected with the rear end of the lower supporting plate and the rear end of the upper positioning plate, and 4 connecting beams are sequentially connected end to form an M-shaped frame; an accommodating cavity for installing control instrument equipment is formed among the lower supporting plate, the upper positioning plate and the M-shaped frame; connecting pieces for fixing control instrument equipment are arranged on the lower supporting plate and the upper positioning plate;
the two connecting lugs are arranged on the bottom surface of the lower supporting plate side by side, are respectively positioned at the left end and the right end of the lower supporting plate and are close to the rear end, the other two connecting lugs are arranged on the rear surface of the upper positioning plate side by side and are respectively positioned at the left end and the right end of the upper positioning plate, and the distance between the two connecting lugs on the upper positioning plate is smaller than the distance between the two connecting lugs on the lower supporting plate;
each connecting lug is provided with a shock absorber mounting hole, the shock absorber mounting holes of 2 connecting lugs on the lower supporting plate are coaxial, and the shock absorber mounting holes of 2 connecting lugs on the upper positioning plate are coaxial;
the 4 shock absorbers are respectively arranged in the shock absorber mounting holes of the 4 connecting lugs;
one end of each of the 4 connecting assemblies is arranged on each of the 4 vibration dampers, and the other end of each of the 4 connecting assemblies is used for being connected with a fixed structure on the engine.
Further, the 4 connecting lugs are arranged in an isosceles trapezoid shape.
Furthermore, the vibration damper is a metal vibration damper and comprises a limiting sleeve, a limiting gasket and 2 metal vibration damping pads which are oppositely arranged;
the 2 metal vibration damping pads are step-shaped, the large ends of the 2 metal vibration damping pads are respectively positioned at the two sides of the connecting lug, and the small ends of the 2 metal vibration damping pads are all arranged in the vibration damper mounting hole; spacing sleeve wears to establish on 2 metal damping pad, and metal damping pad is all stretched out at both ends, and wherein one end is equipped with spacing bulge loop, other end and spacing gasket threaded connection.
Furthermore, every coupling assembling includes 2 fixed extension boards, and the one end of 2 fixed extension boards all is equipped with first mounting hole, and the other end all is equipped with the second mounting hole that is used for being connected with engine fixed knot constructs, passes the first mounting hole of one of them fixed extension board, spacing telescopic centre bore, the first mounting hole of another fixed extension board in proper order through the bolt to be connected with the nut, realize coupling assembling and shock absorber's fixed.
Furthermore, 2 washers are sleeved on the bolt and are respectively positioned between the fixing support plate and the head of the bolt and between the limiting gasket and the nut.
Furthermore, the shock absorber mounting hole comprises a first through hole, a second through hole and a third through hole which are sequentially arranged along the axial direction, and the diameters of the first through hole and the third through hole are equal and larger than that of the second through hole;
the small end of each metal vibration damping pad comprises a first shaft section and a second shaft section which are fixedly connected, the first shaft section is connected with the large end, and the diameter of the first shaft section is larger than that of the second shaft section;
the first shaft sections of the 2 metal vibration damping pads are respectively arranged in the first through hole and the third through hole, and the second shaft sections are respectively arranged in the second through hole.
Furthermore, the metal vibration damping pad is made of metal rubber;
the connecting lug, the lower supporting plate, the upper positioning plate and the connecting beam are designed in an integrated mode and made of high-strength titanium alloy materials.
Further, the second mounting hole on each fixed support plate is 2 kidney-shaped holes arranged side by side.
Furthermore, lightening holes are formed in the lower supporting plate and the upper positioning plate;
the cross section of the connecting beam is T-shaped;
the connecting piece is a connecting hole;
and limiting plates fixedly connected with the lower ends of the outermost connecting beams are arranged at the two ends of the upper surface of the lower supporting plate, and connecting holes for fixing control instrument equipment are formed in the limiting plates.
Compared with the prior art, the invention has the advantages that:
1. the wall-mounted type vibration reduction fixing device adopts a mode that the M-shaped support is matched with the 4 vibration absorbers, on one hand, the M-shaped support coordinates the working states of the 4 vibration absorbers by utilizing the structural rigidity of the M-shaped support, on the other hand, the load deformation caused by inconsistent working states of the vibration absorbers is borne by the structure of the M-shaped support, so that the vibration energy intensity borne by the instrument box body is greatly weakened, and the normal work of the control instrument equipment is ensured.
2. The metal shock absorber absorbs energy through the deformation of the metal shock absorption pad and the mutual friction between the metal wires, so that the level of the energy transmitted to the fixed support plate is reduced, and the effects of absorbing shock and reducing impact are achieved; the limiting sleeve and the limiting gasket provide support and longitudinal limitation, and the axial distance between the limiting sleeve and the limiting gasket can be adjusted under the condition that the overall dimension of the metal vibration damping pad is fixed, so that the resonance frequency of the vibration damping system is changed.
3. The M-shaped bracket is designed by structural topology optimization, can reflect a real force transmission path of a system, has high structural rigidity, and has light weight on the premise of ensuring the force bearing and connecting functions.
4. The installation mode of the metal shock absorber is different from the installation mode of a common wall-mounted shock absorber, and the 4 shock absorbers are installed on the M-shaped bracket in a matching mode, so that the vibration and impact magnitude of the control instrument and equipment in the three-dimensional direction can be effectively controlled.
5. The shock absorber mounting hole is step-shaped, so that the coating area of the metal shock absorption pad on the shock absorber mounting hole is increased, and the shock absorption and impact reduction effects are improved.
Drawings
FIG. 1 is a schematic view of a wall-mounted vibration-damping mounting apparatus for a control device for an engine according to the present invention;
FIG. 2 is a first schematic structural view of an M-shaped bracket according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram II of an M-shaped bracket according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a shock absorber in an embodiment of the present invention;
FIG. 5 is a schematic view of the mounting of the damper according to the embodiment of the present invention;
FIG. 6 is a schematic view of a fixture in cooperation with a control instrument according to an embodiment of the present invention;
FIG. 7 is a stress cloud for an M-shaped stent in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of the deformation of an M-shaped bracket under high-magnitude random vibration in an embodiment of the present invention;
wherein the reference numbers are as follows:
01-control instrumentation;
1-M-shaped support, 11-connecting lugs, 12-lower support plates, 13-upper positioning plates, 14-connecting beams, 15-shock absorber mounting holes, 151-first through holes, 152-second through holes, 153-third through holes, 16-connecting pieces, 17-lightening holes and 18-limiting plates;
2-vibration absorber, 21-limit sleeve, 211-limit convex ring, 22-limit gasket, 23-metal vibration-damping pad, 231-big end, 232-small end, 2321-first shaft section, 2322-second shaft section, 24-bolt, 25-nut, 26-washer;
3-connecting component, 31-fixing support plate, 311-first mounting hole, 312-second mounting hole.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
At the moment of starting the rocket engine, the thrust reaches hundred tons, so that thousands of g of instantaneous impact is generated; in operation, the engine is in a very high magnitude high frequency vibration environment with 7 g accelerations. In order to ensure that the control instrument device 01 can normally work in the process of starting and working of the engine, the control device needs to be fixed on the engine and subjected to vibration reduction treatment, and the weight of a fixing device for fixing the control instrument device 01 cannot be too heavy, otherwise, the thrust-weight ratio of the engine is reduced, and more fuel is wasted. Generally, the control instrument 01 should not be designed to be too thick and heavy for heat dissipation and weight reduction, but if the structure is too thin and light, the bearing performance is poor, and the control instrument is prone to failure in the impact process. Therefore, the invention adopts the mode that the M-shaped bracket 1 is matched with the vibration damper 2 to install the control instrument device 01 on the engine, and can ensure the normal work of the control instrument device 01.
As shown in fig. 1 and 6, the wall-mounted vibration damping fixing device for a control instrument device for an engine of the present invention mainly comprises an M-shaped bracket 1, 4 vibration dampers 2 and 4 connecting assemblies 3.
As shown in fig. 2 and 3, the M-shaped bracket 1 includes 4 coupling lugs 11, a lower support plate 12, an upper positioning plate 13 disposed in parallel above the lower support plate 12, and 4 coupling beams 14 disposed between the lower support plate 12 and the upper positioning plate 13; the length of the lower support plate 12 is greater than that of the upper positioning plate 13.
Two ends of each connecting beam 14 are respectively connected with the rear end of the lower supporting plate 12 and the rear end of the upper positioning plate 13, and the 4 connecting beams 14 are sequentially connected end to form an M-shaped frame; an accommodating cavity for installing control instrument equipment 01 is formed among the lower supporting plate 12, the upper positioning plate 13 and the M-shaped frame; limiting plates 18 fixedly connected with the lower ends of the outermost connecting beams 14 are arranged at two ends of the upper surface of the lower supporting plate 12, connecting pieces 16 for fixing control instrument devices 01 are arranged on the lower supporting plate 12, the upper positioning plate 13 and the limiting plates 18, the connecting pieces 16 are connecting holes in the embodiment, specifically, 4 connecting holes are arranged on the lower supporting plate 12, 3 connecting holes are arranged on each limiting plate 18, 6 connecting holes are totally arranged on 2 limiting plates 18, 10 connecting holes are arranged on the upper positioning plate 13, then, the M-shaped support 1 is provided with 20 connecting holes, the 20 connecting holes are distributed on 4 surfaces and are respectively arranged on 20 connecting holes through 20 screws and are connected with 4 surfaces (upper, lower, left and right surfaces) of the box body of the control instrument devices 01, so that the control instrument devices 01 can be installed on the M-shaped support 1, the rear end surface of the box body is matched with the front surface of the M-shaped frame, and a front cover plate of the box body can be opened, for internal inspection and maintenance, and the other 5 surfaces are matched with the M-shaped frame. Therefore, the control instrument device 01 is connected to the M-shaped bracket 1 through the screws on the 4 surfaces, and the dynamic loads in three directions can be uniformly distributed on the box body of the control instrument device 01.
Wherein 2 engaging lugs 11 set up side by side in the bottom surface of lower support plate 12, and lie in respectively about lower support plate 12 both ends and be close to the rear end setting, and 2 engaging lugs 11 set up side by side in the rear surface of locating plate 13 in addition to lie in respectively about locating plate 13 both ends. Each connecting lug 11 is provided with a shock absorber mounting hole 15, the shock absorber mounting holes 15 of the 2 connecting lugs 11 on the lower supporting plate 12 are coaxial, and the shock absorber mounting holes 15 of the 2 connecting lugs 11 on the upper positioning plate 13 are coaxial. In order to improve the stability of the engaging lugs 11, reinforcing ribs are arranged between the 2 engaging lugs 11 on the lower support plate 12 and the bottom surface of the lower support plate 12, and reinforcing ribs are arranged between the 2 engaging lugs 11 on the upper positioning plate 13 and the upper surface of the upper positioning plate 13.
The 4 vibration dampers 2 are respectively arranged in the vibration damper mounting holes 15 of the 4 connecting lugs 11, and the 4 vibration dampers 2 are respectively arranged on one side of the M-shaped fixed support close to the engine and symmetrically distributed on the left side and the right side; each damper 2 is connected to the fixed structure of the engine by means of a connecting assembly 3.
The M-shaped bracket 1 is made of high-strength titanium alloy. The structural form is shown in fig. 2, and the specific structural size can be designed secondarily according to the outer contour size, the mass and the gravity center distribution of the fixed control instrument device 01. The cross-section of tie-beam 14 is the T shape, realizes 4 shock absorber mounting holes 15's rigid connection through the frame construction that the cross-section is the T shape to produce the effect of shock absorber 2 collaborative work, avoid because of the extra load and the deformation that shock absorber 2 work desynchrony and lead to act on control instrument equipment 01.
Two shock absorber mounting holes 15 at the lower end of the M-shaped support 1 are coaxial and are positioned below the lower support plate 12 and close to the engine side, and mainly bear the acceleration inertia force of the control instrument equipment 01; and two shock absorber mounting holes 15 at the upper end are coaxial and are positioned at one side of the upper end of the M-shaped frame close to the engine, and share part of acceleration inertia force and all equipment overturning force.
Go up 11 intervals of 2 engaging lugs on the locating plate 13 and be less than 211 intervals of engaging lug on the backup pad 12, then the interval of 2 mounted positions of two shock absorbers of upper end is less than the interval of 2 mounted positions of two shock absorbers of lower extreme, and preferred 4 engaging lugs 11 are isosceles trapezoid and arrange, and 4 shock absorbers 2 are trapezoidal state distribution promptly, are favorable to the overall stability of device.
The damper 2 is a metal damper, as shown in fig. 4 and 5, the metal damper includes a limit sleeve 21, a limit gasket 22 and 2 metal damping pads 23 arranged oppositely, the metal damping pads 23 are made of metal rubber material, and metal springs are woven into a net shape by a specific process and then cold-pressed and molded. The 2 metal vibration damping pads 23 are all step-shaped, the large ends 231 of the 2 metal vibration damping pads 23 are respectively positioned at two sides of the connecting lug 11, and the small ends 232 are all arranged in the vibration damper mounting hole 15; limiting sleeve 21 is arranged on 2 metal damping pads 23 in a penetrating mode, the two ends of the limiting sleeve extend out of the metal damping pads 23, one end of the limiting sleeve is provided with a limiting convex ring 211, and the other end of the limiting sleeve is in threaded connection with a limiting gasket 22. The metal shock absorber adopts the working principle that energy is absorbed through deformation of a metal shock pad and mutual friction between metal wires, so that the energy level transmitted to the connecting component 3 (the fixed support plate 31) is reduced, the effects of vibration reduction and impact reduction are achieved, and the metal shock absorber belongs to passive vibration isolation; the limiting sleeve 21 and the limiting gasket 22 provide support and longitudinal limitation, and under the condition that the external dimension of the metal damping pad 23 is fixed, the axial rigidity and the radial rigidity of the damper 2 can be indirectly adjusted by adjusting the space dimension and the external diameter dimension of the limiting sleeve 21, so that the resonance frequency of the damping system is changed.
Each connecting assembly 3 comprises 2 fixing support plates 31, and the fixing support plates 31 play a role in clamping and fixing the metal damper and connecting the engine. Specifically, one end of each of the 2 fixed support plates 31 is provided with a first mounting hole 311, and after a bolt 24 of M12 sequentially passes through the first mounting hole 311 of one of the fixed support plates 31, a central hole of the limiting sleeve 21 and the first mounting hole 311 of the other fixed support plate 31, the bolt is connected with a nut 25 to fix the connecting assembly 3 and the vibration damper 2, and the metal vibration damper is clamped between the two fixed support plates 31; the other end of each fixed support plate 31 is provided with a second mounting hole 312 for connecting with an engine fixing structure, one end of each fixed support plate 31 connected with the engine is provided with a butt plate for matching with the engine fixing structure, the second mounting holes 312 are waist-shaped holes arranged on the butt plate, preferably 2 waist-shaped holes arranged side by side, and the waist-shaped holes are arranged by using bolts M10 and connected with the engine fixing structure and compensate assembly errors. The bolt 24 is also sleeved with 2 washers 26, one of which is positioned between the fixing support plate 31 and the head of the bolt 24, and the other is positioned between the limiting washer 22 and the nut 25.
The section of the shock absorber mounting hole 15 on the M-shaped fixing bracket of the embodiment is designed to be a stepped shape, and includes a first through hole 151, a second through hole 152 and a third through hole 153 which are sequentially arranged along the axial direction, and the diameters of the first through hole 151 and the third through hole 153 are equal and larger than the diameter of the second through hole 152; the small end 232 of each metal damping pad 23 comprises a first shaft segment 2321 and a second shaft segment 2322 which are fixedly connected, the first shaft segment 2321 is connected with the large end 231, and the diameter of the first shaft segment 2321 is larger than that of the second shaft segment 2322; the first shaft segments 2321 of the 2 metal vibration damping pads 23 are respectively disposed in the first through hole 151 and the third through hole 153, and the second shaft segments 2322 are disposed in the second through hole 152.
In the embodiment, the connecting lugs 11, the lower supporting plate 12, the upper positioning plate 13 and the connecting beams 14 are designed integrally and made of high-strength titanium alloy; lightening holes 17 are arranged on the lower supporting plate 12 and the upper positioning plate 13.
When the control instrument device 01 is installed on an engine, in order to avoid the influence of high-frequency vibration and high impact of the engine on the normal operation of the control instrument device 01, a plurality of vibration absorbers 2 are generally directly installed between a box body of the control instrument device 01 and the engine, the vibration energy is absorbed through the large deformation of the plurality of vibration absorbers 2, the plurality of vibration absorbers 2 are not obviously associated with each other, the whole vibration attenuation efficiency is low, and the box body is influenced when the acting forces of the plurality of vibration absorbers 2 are different; the M-shaped support 1 has high structural rigidity and bearing capacity under the condition of small structural mass, optimizes the number and the installation direction of the vibration absorbers 2 in order to adapt to the high-magnitude vibration impact environment of the engine, performs unified vibration and impact environment management on a system comprising the equipment, avoids the vibration absorbers 2, the control instrument equipment 01 and the resonance frequency band of the engine, effectively inhibits the vibration coupling phenomenon, and ensures the normal work of the control instrument equipment 01.
The number and the installation positions of the metal shock absorbers are optimally designed and tested, and the metal shock absorbers have the characteristic of cooperative work; the M-shaped bracket 1 is designed through structural topology optimization, can reflect a real system force transmission path, has high structural rigidity and lighter weight on the premise of ensuring functions; the installation mode of the metal shock absorber is different from the installation mode of a common wall-mounted shock absorber 2, and the vibration and impact magnitude of the control instrument device 01 in the three-dimensional direction can be effectively controlled; the metal vibration damping pad 23 has larger coating area on the vibration damper mounting hole 15 on the M-shaped support 1, and the vibration damping and impact reducing effects are good.
Fig. 7 is a stress cloud diagram of an M-shaped fixing bracket: under the high-magnitude random vibration, the overall stress of the bracket is relatively uniform, the maximum value of the stress is 114.36MPa, only a small part of area exists, and the bracket belongs to the safe use range of materials; fig. 8 is a schematic deformation diagram of the M-shaped fixing bracket: under the random vibration of high magnitude, the whole deformation of the support is small, the rigidity of the whole structure is large, and the deformation of the installation position of the shock absorber is minimum. The wall-mounted vibration reduction fixing device can bear high-strength random vibration of 38g in three directions within 20-2000 Hz; the high-strength impact of 3991g in three directions within 100-5000 Hz can be borne; the fixing device can fix the equipment and simultaneously protect the equipment from being damaged in high-magnitude vibration and impact environments; the fixing device is designed by structural topology optimization, so that the weight is light, and the structural rigidity is high; the fixing device has the dead weight of about 4.9 kilograms, and can fix equipment within 45 kg.
The assembly process of the wall-mounted vibration damping fixing device of the embodiment is as follows:
1) the control instrument device 01 is installed in an accommodating cavity of the M-shaped bracket 1, and is respectively installed in 20 connecting holes of the M-shaped bracket 1 through 20 screws, so that the control instrument device 01 is fixedly connected to the M-shaped bracket 1;
2) one of the metal shock absorbers is installed on one of the metal shock absorber installation holes 15 of the M-shaped bracket 1, a second shaft section 2322 (small diameter) of 2 metal shock absorption pads 23 of each metal shock absorber penetrates through the second through hole 152 of the shock absorber installation hole 15, and a second shaft section 2322 (large diameter) penetrates through the first through hole 151 and the third through hole 153 respectively;
3) pass 2 metal damping pads 23 on the shock absorber mounting hole 15 with spacing sleeve 21 to with the threaded connection of internal thread on the spacing gasket 22, installation moment reference value: 30 N.m;
4) according to the method of the step 2) and the step 3), respectively installing the remaining 3 metal dampers on the remaining 3 metal damper installation holes 15, and completing the installation and fixation of 4 metal dampers on the damper installation holes 15;
5) adjusting the assembling position and angle of the fixed support plate 31;
6) a bolt 24 standard part which accords with GB/T70.1 and is M12 multiplied by 90 penetrates through the 2 fixed support plates 31 and the limiting sleeve 21 of the metal shock absorber which are matched with each other, and is matched with the nut 25, the 2 fixed support plates 31 are connected with the metal shock absorber, and the fixed support plates 31 are installed on the M-shaped support 1;
7) and (3) placing the whole body after the connection in the step 6) in an engine fixing area, connecting the whole body with a fixing structure of the engine by using bolts 24 to penetrate through second mounting holes 312 of the fixing support plate 31, and mounting the fixing device with the control instrument device 01 hung in the engine fixing area.
Instantaneous impact generated when an engine is started is transmitted to the metal shock absorber through the bolts 24 by the fixed support plates 31 on the two sides of the shock absorber 2, and because the M-shaped support 1 adopts a T-shaped beam structure to connect every two shock absorber mounting holes 15, the rigidity of the whole structure is higher, impact load can be uniformly distributed on the four metal shock absorbers, and the shock absorber 2 deforms synchronously to attenuate impact energy, so that the effect of reducing the impact magnitude is achieved. Meanwhile, in the impact direction, the M-shaped support 1 and the control instrument device 01 have two contact surfaces, so that impact load can be uniformly transmitted to a force bearing frame of the case, and an integrated circuit board, an electric connector, a welding spot, a chip and the like in the case do not need to directly bear larger impact load.
High-frequency random vibration generated when the engine normally works is transmitted to the four vibration absorbers 2 through the fixed support plate 31, the working states of the vibration absorbers 2 are inconsistent due to the randomness of the vibration, and the vibration transmitted to the vibration absorbers 2 is also disordered. In the embodiment, the M-shaped support 1 coordinates the working states of the four vibration absorbers 2 by using the structural rigidity of the support, and bears the load and deformation caused by inconsistent working states of the vibration absorbers 2 through the structure of the support; as a result, the vibration energy intensity of the instrument box body is greatly weakened, and the normal work of the control instrument device 01 is guaranteed.
The above description is only for the preferred embodiment of the present invention and does not limit the technical solution of the present invention, and any modifications made by those skilled in the art based on the main technical idea of the present invention belong to the technical scope of the present invention.
Claims (9)
1. The utility model provides a wall-hanging damping fixing device of control instrument equipment for engine which characterized in that: comprises an M-shaped bracket (1), 4 shock absorbers (2) and 4 connecting components (3);
the M-shaped bracket (1) comprises 4 connecting lugs (11), a lower supporting plate (12), an upper positioning plate (13) arranged above the lower supporting plate (12) and 4 connecting beams (14) arranged between the lower supporting plate (12) and the upper positioning plate (13);
the length of the lower supporting plate (12) is greater than that of the upper positioning plate (13);
two ends of each connecting beam (14) are respectively connected with the rear end of the lower supporting plate (12) and the rear end of the upper positioning plate (13), and 4 connecting beams (14) are sequentially connected end to form an M-shaped frame; an accommodating cavity for installing control instrument equipment (01) is formed among the lower supporting plate (12), the upper positioning plate (13) and the M-shaped frame; the lower supporting plate (12) and the upper positioning plate (13) are respectively provided with a connecting piece (16) for fixing control instrument equipment (01);
the two-dimensional positioning device comprises a lower supporting plate (12), two connecting lugs (11), an upper positioning plate (13), two connecting lugs (11), a lower positioning plate (12), two connecting lugs (11), a lower positioning plate (13), two positioning plates (13) and a positioning plate, wherein the two connecting lugs (11) are arranged on the bottom surface of the lower supporting plate (12) side by side, are respectively positioned at the left end and the right end of the lower supporting plate (12) and are close to the rear end, the other 2 connecting lugs (11) are arranged on the rear surface of the upper positioning plate (13) side by side and are respectively positioned at the left end and the right end of the upper positioning plate (13), and the distance between the two connecting lugs (11) on the upper positioning plate (13) is smaller than that between the two connecting lugs (11) on the lower supporting plate (12);
each connecting lug (11) is provided with a shock absorber mounting hole (15), the shock absorber mounting holes (15) of 2 connecting lugs (11) on the lower supporting plate (12) are coaxial, and the shock absorber mounting holes (15) of 2 connecting lugs (11) on the upper positioning plate (13) are coaxial;
the 4 shock absorbers (2) are respectively arranged in the shock absorber mounting holes (15) of the 4 connecting lugs (11);
one end of each of the 4 connecting assemblies (3) is arranged on each of the 4 shock absorbers (2), and the other end of each of the 4 connecting assemblies is used for being connected with an engine.
2. A wall-mounted type vibration damping fixing device of a control equipment for an engine according to claim 1, characterized in that: the 4 connecting lugs (11) are arranged in an isosceles trapezoid shape.
3. A wall-mounted vibration damping mount for a control device for an engine according to claim 1 or 2, wherein: the shock absorber (2) comprises a limiting sleeve (21), a limiting gasket (22) and 2 metal shock absorbing pads (23) which are oppositely arranged;
the 2 metal vibration damping pads (23) are step-shaped, the large ends (231) of the 2 metal vibration damping pads (23) are respectively positioned at two sides of the connecting lug (11), and the small ends (232) are all arranged in the vibration damper mounting hole (15); limiting sleeve (21) is arranged on 2 metal damping pads (23) in a penetrating mode, the two ends of the limiting sleeve extend out of the metal damping pads (23), one end of the limiting sleeve is provided with a limiting convex ring (211), and the other end of the limiting sleeve is in threaded connection with a limiting gasket (22).
4. A wall-mounted vibration damping mount for a control instrument device for an engine as defined in claim 3, wherein: every coupling assembling (3) includes 2 fixed extension boards (31), the one end of 2 fixed extension boards (31) all is equipped with first mounting hole (311), the other end all is equipped with second mounting hole (312) that are used for being connected with the engine, pass first mounting hole (311) of one of them fixed extension board (31) through bolt (24) in proper order, the centre bore of spacing sleeve (21), first mounting hole (311) of another fixed extension board (31), and be connected with nut (25), realize the fixed of coupling assembling (3) and shock absorber (2).
5. A wall-mounted vibration-damping mounting apparatus for a control device for an engine according to claim 4, wherein: the bolt (24) is sleeved with 2 washers (26) which are respectively positioned between the fixed support plate (31) and the head of the bolt (24) and between the limiting gasket (22) and the nut (25).
6. A wall-mounted vibration-damping mounting apparatus for a control device for an engine according to claim 4, wherein: the shock absorber mounting hole (15) comprises a first through hole (151), a second through hole (152) and a third through hole (153) which are sequentially arranged along the axial direction, and the diameters of the first through hole (151) and the third through hole (153) are larger than that of the second through hole (152);
the small end (232) of each metal vibration damping pad (23) comprises a first shaft section (2321) and a second shaft section (2322) which are fixedly connected, the first shaft section (2321) is connected with the large end (231), and the diameter of the first shaft section (2321) is larger than that of the second shaft section (2322);
the first shaft sections (2321) of the 2 metal vibration damping pads (23) are respectively arranged in the first through hole (151) and the third through hole (153), and the second shaft sections (2322) are respectively arranged in the second through hole (152).
7. A wall-mounted vibration damping mounting apparatus for a control device apparatus for an engine as defined in claim 6, wherein: the metal vibration damping pad (23) is made of metal rubber;
the connecting lugs (11), the lower supporting plate (12), the upper positioning plate (13) and the connecting beam (14) are designed in an integrated mode and made of high-strength titanium alloy materials.
8. A wall-mounted vibration damping mounting apparatus for a control device apparatus for an engine as claimed in claim 7, wherein: the second mounting hole (312) on each fixed support plate (31) is a kidney-shaped hole.
9. A wall-mounted vibration damping mount for a control instrument device for an engine as claimed in claim 1, wherein: lightening holes (17) are formed in the lower supporting plate (12) and the upper positioning plate (13);
the cross section of the connecting beam (14) is T-shaped;
the connecting piece (16) is a connecting hole;
limiting plates (18) fixedly connected with the lower ends of the outermost connecting beams (14) are arranged at two ends of the upper surface of the lower supporting plate (12), and connecting holes for fixing control instrument equipment (01) are formed in the limiting plates (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538952.5A CN114440099B (en) | 2021-12-15 | 2021-12-15 | Wall-mounted vibration reduction fixing device of control instrument for engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538952.5A CN114440099B (en) | 2021-12-15 | 2021-12-15 | Wall-mounted vibration reduction fixing device of control instrument for engine |
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| CN114440099A true CN114440099A (en) | 2022-05-06 |
| CN114440099B CN114440099B (en) | 2023-06-23 |
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| JP2001200885A (en) * | 2000-01-14 | 2001-07-27 | Tokai Rubber Ind Ltd | Active damper |
| DE10361294A1 (en) * | 2003-12-24 | 2005-07-21 | Andreas Stihl Ag & Co. Kg | Vibration absorber between an internal combustion engine and a vibration isolated, hand-operated tool comprises a vibration damper made of a foamed plastic, and a metal, in particular, steel spring |
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| CN213888027U (en) * | 2020-12-16 | 2021-08-06 | 西安道晟航空装备科技有限公司 | Titanium alloy forging supporting seat for domestic civil aircraft |
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|---|---|---|---|---|
| JP2001200885A (en) * | 2000-01-14 | 2001-07-27 | Tokai Rubber Ind Ltd | Active damper |
| DE10361294A1 (en) * | 2003-12-24 | 2005-07-21 | Andreas Stihl Ag & Co. Kg | Vibration absorber between an internal combustion engine and a vibration isolated, hand-operated tool comprises a vibration damper made of a foamed plastic, and a metal, in particular, steel spring |
| CN2861613Y (en) * | 2005-06-16 | 2007-01-24 | 徐州工程机械科技股份有限公司徐工研究院 | Vibration damping device of engine |
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| CN114440099B (en) | 2023-06-23 |
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