CN114440099B - Wall-mounted vibration reduction fixing device of control instrument for engine - Google Patents
Wall-mounted vibration reduction fixing device of control instrument for engine Download PDFInfo
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- CN114440099B CN114440099B CN202111538952.5A CN202111538952A CN114440099B CN 114440099 B CN114440099 B CN 114440099B CN 202111538952 A CN202111538952 A CN 202111538952A CN 114440099 B CN114440099 B CN 114440099B
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- 230000009467 reduction Effects 0.000 title claims abstract description 38
- 239000006096 absorbing agent Substances 0.000 claims abstract description 55
- 230000035939 shock Effects 0.000 claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 claims description 58
- 239000002184 metal Substances 0.000 claims description 58
- 238000013016 damping Methods 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000001603 reducing effect Effects 0.000 claims description 5
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 229920001967 Metal rubber Polymers 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 3
- 239000000725 suspension Substances 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
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 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
- 238000003825 pressing Methods 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 reduction fixing device of control instrument equipment for an engine, which solves the problem that the normal operation of the control instrument equipment is affected by directly mounting the control instrument equipment on the engine in the prior art. The fixing device comprises an M-shaped bracket, 4 shock 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 connected end to end in sequence to form an M-shaped frame; the lower supporting plate and the upper positioning plate are provided with connecting pieces; the 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 vibration dampers are respectively arranged in the vibration damper mounting holes of the 4 connecting lugs; one end of the 4 connecting components is respectively arranged on the 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 of control instrument equipment, in particular to a wall-mounted vibration reduction fixing device of control instrument equipment for an engine.
Background
The engine is one of the most severe areas of rocket vibration and starting shock environments, and control equipment for controlling the operation of the engine is usually installed in an instrument pod, the space of the instrument pod is generally large, the environment is mild, and the magnitude of high-frequency vibration and starting shock is small. With the development of the aerospace propulsion technology, new requirements on health detection, intelligence and quick control are met for the engine, and the control instrument 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 the rated working process, and the working environment is severe. If the control instrument is directly arranged on the engine, the starting impact and the high-frequency vibration influence the normal operation of the control instrument, even lead to the failure of the box body structure of the equipment, the electronic components and the like, and directly relate to the success or failure of the emission of the whole spacecraft.
Disclosure of Invention
The invention provides a wall-mounted vibration reduction fixing device of control instrument equipment for an engine, which aims to solve the technical problem that the normal operation 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 arranged on the engine.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a wall-mounted vibration reduction fixing device of control instrument equipment for an engine is characterized in that: comprises an M-shaped bracket, 4 shock 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 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 longer 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; a containing cavity for installing control instrument equipment is formed among the lower supporting plate, the upper positioning plate and the M-shaped frame; the lower supporting plate and the upper positioning plate are respectively provided with a connecting piece for fixing control instrument equipment;
the two connecting lugs are arranged on the left end and the right end 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 2 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 2 connecting lugs on the upper positioning plate is smaller than that between the 2 connecting lugs on the lower supporting plate;
each connecting lug is provided with a damper mounting hole, the damper mounting holes of the 2 connecting lugs on the lower supporting plate are coaxial, and the damper mounting holes of the 2 connecting lugs on the upper positioning plate are coaxial;
the 4 vibration dampers are respectively arranged in the vibration damper mounting holes of the 4 connecting lugs;
one ends of the 4 connecting components are respectively arranged on the 4 shock absorbers, and the other ends of the 4 connecting components are connected with a fixed structure on the engine.
Further, the 4 connecting lugs are arranged in an isosceles trapezoid.
Further, the vibration damper is a metal vibration damper and comprises a limit sleeve, a limit gasket and 2 metal vibration damping pads which are oppositely arranged;
the 2 metal vibration reduction pads are in a step shape, the large ends of the 2 metal vibration reduction pads are respectively positioned at two sides of the connecting lug, and the small ends of the 2 metal vibration reduction pads are arranged in the vibration absorber mounting holes; the limiting sleeve is arranged on the 2 metal vibration reduction pads in a penetrating way, both ends of the limiting sleeve extend out of the metal vibration reduction pads, one end of the limiting sleeve is provided with a limiting convex ring, and the other end of the limiting sleeve is in threaded connection with the limiting gasket.
Further, 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 one of them fixed extension board's first mounting hole, limit sleeve's centre bore, another fixed extension board's first mounting hole in proper order through the bolt to be connected with the nut, realize coupling assembling and shock absorber's fixed.
Further, 2 washers are sleeved on the bolts and are respectively positioned between the fixed support plate and the head of the bolts and between the limiting gasket and the nuts.
Further, 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, wherein the diameters of the first through hole and the third through hole are equal and larger than the diameter of the second through hole;
the small end of each metal vibration reduction 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 reduction 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 holes.
Further, the metal vibration reduction pad is made of metal rubber;
the connecting lug, the lower supporting plate, the upper positioning plate and the connecting beam are integrally designed, and are made of high-strength titanium alloy materials.
Further, the second mounting holes on each fixed support plate are 2 waist-shaped holes arranged side by side.
Further, weight reducing holes are formed in the lower supporting plate and the upper positioning plate;
the section of the connecting beam is T-shaped;
the connecting piece is a connecting hole;
and two ends of the upper surface of the lower supporting plate are provided with limiting plates fixedly connected with the lower ends of the outermost connecting beams, and the limiting plates are provided with connecting holes for fixing control instruments and equipment.
Compared with the prior art, the invention has the advantages that:
1. according to the wall-mounted vibration reduction fixing device, the mode that the M-shaped bracket is matched with the 4 vibration absorbers is adopted, on one hand, the working states of the 4 vibration absorbers are coordinated through the structural rigidity of the M-shaped bracket, on the other hand, load deformation caused by inconsistent working states of the vibration absorbers is born through the structure of the M-shaped bracket, so that the vibration energy intensity of an instrument box body is greatly weakened, and the normal operation of control instrument equipment is ensured.
2. The metal shock absorber of the invention absorbs energy through the deformation of the metal shock pad and the mutual friction between metal wires, so that the energy level transmitted to the fixed support plate is reduced, and the effects of shock absorption and impact reduction are achieved; the limiting sleeve and the limiting gasket provide support and longitudinal limiting, and under the condition that the overall dimension of the metal vibration damping pad is fixed, the resonant frequency of the vibration damping system can be changed by adjusting the axial distance between the limiting sleeve and the limiting gasket.
3. The M-shaped bracket is designed through structural topology optimization, can reflect a real system force transmission path, has high structural rigidity, and has lighter mass on the premise of ensuring 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 4 shock absorbers are installed on an M-shaped bracket in a matching way, so that the vibration and impact magnitude of control instruments and equipment in the three-dimensional direction can be effectively controlled.
5. According to the invention, the mounting holes of the shock absorber are stepped, so that the coating area of the metal shock absorbing pad on the mounting holes of the shock absorber is increased, and the shock absorbing and impact reducing effects are improved.
Drawings
FIG. 1 is a schematic view of a wall-mounted vibration damping fixing device of the control apparatus for an engine of the present invention;
FIG. 2 is a schematic diagram of an M-shaped bracket according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a second embodiment of an M-shaped bracket;
FIG. 4 is a schematic view of a shock absorber in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of the installation of a shock absorber in an embodiment of the present invention;
FIG. 6 is a schematic diagram showing the cooperation of the fixing device and the control apparatus according to the embodiment of the present invention;
FIG. 7 is a stress cloud of an M-shaped stent in an embodiment of the invention;
FIG. 8 is a schematic diagram showing deformation of an M-shaped bracket under high-magnitude random vibration in an embodiment of the invention;
wherein, the reference numerals are as follows:
01-control of the instrumentation;
the device comprises a 1-M-shaped bracket, 11-connecting lugs, 12-lower support plates, 13-upper positioning plates, 14-connecting beams, 15-damper 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 damper, 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-gasket;
3-connecting assembly, 31-fixed support plate, 311-first mounting hole, 312-second mounting hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
At the moment of starting the rocket engine, the thrust reaches hundred tons, so that thousands of g of instant impact is generated; in operation, the engine is in a high frequency vibration environment of extremely high magnitude, accompanied by an acceleration of 7 g. In order to ensure that the control apparatus 01 can work normally during the starting and working process of the engine, the control apparatus needs to be fixed on the engine and vibration reduction is carried out, and the weight of a fixing device for fixing the control apparatus 01 cannot be excessively heavy, otherwise, the thrust-weight ratio of the engine is reduced, and more fuel is wasted. Generally, the control apparatus 01 should not be designed to be too thick for heat dissipation and weight reduction, but if the structure is too thin, the bearing performance is poor, and the fixing apparatus is prone to failure in the impact process. Therefore, the invention adopts the mode of matching the M-shaped bracket 1 and the shock absorber 2 to mount the control instrument device 01 on the engine, and can ensure the normal operation of the control instrument device 01.
As shown in fig. 1 and 6, the wall-mounted vibration damping fixing device for the control instrument and equipment for the engine mainly comprises an M-shaped bracket 1, 4 vibration dampers 2 and 4 connecting components 3.
As shown in fig. 2 and 3, the M-bracket 1 includes 4 connection lugs 11, a lower support plate 12, an upper positioning plate 13 disposed in parallel above the lower support plate 12, and 4 connection 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 the length 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; a containing cavity for installing the control instrument device 01 is formed among the lower supporting plate 12, the upper positioning plate 13 and the M-shaped frame; the both ends of bottom suspension fagging 12 upper surface are equipped with the limiting plate 18 that links firmly with outside tie-beam 14 lower extreme, all be equipped with the connecting piece 16 that is used for fixed control instrument and equipment 01 on bottom suspension fagging 12, go up locating plate 13 and the limiting plate 18, this embodiment connecting piece 16 is the connecting hole, be equipped with 4 connecting holes on the concrete bottom suspension fagging 12, be equipped with 3 connecting holes on every limiting plate 18, 2 limiting plate 18 total 6 connecting holes, be equipped with 10 connecting holes on going up locating plate 13, then M type support 1 is equipped with 20 connecting holes, 20 connecting holes distribute on 4 faces, set up respectively on 20 connecting holes through 20 screws, and be connected with 4 faces (upper, lower, left and right) of the box of control instrument and equipment 01, realize installing control instrument and equipment 01 on M type support 1, the rear end face and the front surface cooperation of M type frame of box, then the front shroud of box can be opened, be used for inside inspection maintenance, 5 other faces all cooperate with M type frame. Therefore, the control instrument device 01 is connected to the M-shaped bracket 1 through screws on 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 are arranged side by side on the bottom surface of the lower support plate 12 and are respectively positioned at the left and right ends of the lower support plate 12 and near the rear end, and 2 engaging lugs 11 are arranged side by side on the rear surface of the upper positioning plate 13 and are respectively positioned at the left and right ends of the upper positioning plate 13. Each connecting lug 11 is provided with a damper mounting hole 15, the damper mounting holes 15 of 2 connecting lugs 11 on the lower supporting plate 12 are coaxial, and the damper mounting holes 15 of 2 connecting lugs 11 on the upper positioning plate 13 are coaxial. In order to improve the stability of the connecting lugs 11, reinforcing ribs are arranged between the 2 connecting 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 connecting lugs 11 on the upper positioning plate 13 and the upper surface of the upper positioning plate 13.
The 4 vibration absorbers 2 are respectively arranged in the vibration absorber mounting holes 15 of the 4 connecting lugs 11, and then the 4 vibration absorbers 2 are respectively arranged at one side of the M-shaped fixed support close to the engine and are symmetrically distributed at the left side and the right side; each damper 2 is connected to a fixed structure of the engine by a connection 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 subjected to secondary optimization design according to the outline size, the mass and the gravity center distribution of the fixed control instrument device 01. The cross section of the connecting beam 14 is T-shaped, and the rigid connection of the 4 damper mounting holes 15 is realized through the frame structure with the T-shaped cross section, so that the cooperative work effect of the damper 2 is generated, and the extra load and deformation caused by the asynchronous work of the damper 2 are avoided to act on the control instrument device 01.
The two damper mounting holes 15 at the lower end of the M-shaped bracket 1 are coaxial and positioned below the lower support plate 12 and close to the engine side, and mainly bear acceleration inertial force of the control instrument device 01; the two damper mounting holes 15 at the upper end are coaxial and are positioned at one side of the upper end of the M-shaped frame, which is close to the engine, so as to share part of acceleration inertial force and all equipment overturning force.
The spacing between the 2 connecting lugs 11 on the upper positioning plate 13 is smaller than the spacing between the 2 connecting lugs 11 on the lower supporting plate 12, so that the spacing between the mounting positions of the two shock absorbers 2 at the upper end is smaller than the spacing between the mounting positions of the two shock absorbers 2 at the lower end, and 4 connecting lugs 11 are preferably arranged in an isosceles trapezoid, namely 4 shock absorbers 2 are distributed in a trapezoid state, and the overall stability of the device is facilitated.
The shock absorber 2 is a metal shock absorber, as shown in fig. 4 and 5, the metal shock absorber comprises a limit sleeve 21, a limit gasket 22 and 2 metal shock absorbing pads 23 which are oppositely arranged, the metal shock absorbing pads 23 are made of metal rubber materials, and the metal springs are woven into a net shape through a specific process and then are formed through cold pressing. The 2 metal vibration reduction pads 23 are in a step shape, the large ends 231 of the 2 metal vibration reduction pads 23 are respectively positioned at the two sides of the connecting lug 11, and the small ends 232 are respectively arranged in the vibration absorber mounting holes 15; the limiting sleeve 21 is arranged on the 2 metal vibration reduction pads 23 in a penetrating way, both ends of the limiting sleeve extend out of the metal vibration reduction 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 the limiting gasket 22. The working principle of the metal shock absorber is that the energy is absorbed through the deformation of the metal shock absorber and the 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 shock absorption 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 limiting, and the axial rigidity and the radial rigidity of the vibration damper 2 can be indirectly adjusted by adjusting the spacing size and the outer diameter size of the limiting sleeve 21 under the condition that the external dimension of the metal vibration damper pad 23 is fixed, so that the resonant frequency of the vibration damper system is changed.
Each connection assembly 3 comprises 2 fixing support plates 31, and the fixing support plates 31 play a role of clamping and fixing the metal damper and connecting the engine. Specifically, one end of each of the 2 fixing support plates 31 is provided with a first mounting hole 311, and after passing through the first mounting hole 311 of one fixing support plate 31, the central hole of the limit sleeve 21 and the first mounting hole 311 of the other fixing support plate 31 in sequence by using the bolt 24 of the M12, the fixing support plate is connected with the nut 25 to fix the connecting assembly 3 and the shock absorber 2, and the metal shock absorber is clamped between the two fixing support plates 31; the other end of each fixing support plate 31 is provided with a second mounting hole 312 for connecting with an engine fixing structure, one end of each fixing support plate 31 connected with the engine is provided with an abutting plate for matching with the engine fixing structure, the second mounting holes 312 are waist-shaped holes on the abutting plate, preferably 2 waist-shaped holes arranged side by side, and bolts of M10 are used for connecting the waist-shaped holes with the engine fixing structure and compensating assembly errors. The bolts 24 are also sleeved with 2 washers 26, one of which is located between the fixed support plate 31 and the head of the bolts 24, and the other of which is located between the limit washer 22 and the nut 25.
The section of the damper mounting hole 15 on the M-shaped fixing bracket of the embodiment is designed to be a step, 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, wherein 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 vibration reduction 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 segments 2321 of the 2 metallic vibration-damping pads 23 are disposed within the first through-hole 151 and the third through-hole 153, respectively, and the second shaft segments 2322 are disposed within the second through-hole 152.
The connecting lug 11, the lower supporting plate 12, the upper positioning plate 13 and the connecting beam 14 are integrally designed, and are made of high-strength titanium alloy; the lower support plate 12 and the upper positioning plate 13 are provided with weight reducing holes 17.
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 usually installed between a box body of the control instrument device 01 and the engine, vibration energy is absorbed through larger deformation of the plurality of vibration absorbers 2, no obvious correlation exists between the plurality of vibration absorbers 2, the overall vibration absorption 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 bracket 1 of the embodiment has higher structural rigidity and bearing capacity under smaller 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, manages unified vibration and impact environments of a system comprising equipment, avoids the vibration absorbers 2 and the resonance frequency bands of the control instrument equipment 01 and the engine, effectively inhibits the occurrence of vibration coupling phenomenon, and ensures the normal operation of the control instrument equipment 01.
The number and the installation positions of the metal vibration absorbers are optimally designed and tested, and the metal vibration 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 has lighter mass on the premise of ensuring the function; the installation mode of the metal shock absorber is different from the installation mode of the general 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 reduction pad 23 has larger coating area on the vibration reduction device mounting hole 15 on the M-shaped bracket 1, and has good vibration reduction and impact reduction effects.
Fig. 7 is a stress cloud of an M-shaped fixing bracket: under the random vibration of high magnitude, the overall stress of the bracket is uniform, the maximum stress is 114.36MPa, and only a small part of area exists, so that the bracket belongs to the safe use range of materials; fig. 8 is a schematic deformation diagram of an M-shaped fixing bracket: under the random vibration of high magnitude, the whole deformation of the bracket is small, the rigidity of the whole structure is large, and the deformation of the mounting position of the shock absorber is minimum. The wall-mounted vibration reduction fixing device can bear 38g of high-strength random vibration in 20-2000 Hz in three directions; can bear 3991g of high-strength impact in three directions of 100-5000 Hz; the fixing device can fix equipment and protect the equipment from being damaged in a high-magnitude vibration and impact environment; the fixing device is designed in a structural topology optimization way, so that the weight is lighter, and the structural rigidity is higher; the dead weight of the fixing device is about 4.9 kg, and equipment within 45kg can be fixed.
The assembly process of the wall-mounted vibration damping fixing device of the embodiment is as follows:
1) The control instrument equipment 01 is arranged in the accommodating cavity of the M-shaped bracket 1, and is respectively arranged in 20 connecting holes of the M-shaped bracket 1 through 20 screws, so that the control instrument equipment 01 is fixedly connected to the M-shaped bracket 1;
2) One of the metal vibration dampers is mounted on one of the metal vibration damper mounting holes 15 of the M-shaped support 1, the second shaft sections 2322 (small diameter) of the 2 metal vibration damper pads 23 of each metal vibration damper penetrate into the second through holes 152 of the vibration damper mounting holes 15, and the second shaft sections 2322 (large diameter) penetrate into the first through holes 151 and the third through holes 153 respectively;
3) The limit sleeve 21 passes through 2 metal vibration reduction pads 23 on the vibration reduction device mounting hole 15 and is connected with the internal thread of the limit gasket 22 by threads, and the torque reference value is mounted: 30 N.m;
4) According to the method of the step 2) and the step 3), the rest 3 metal vibration dampers are respectively installed on the rest 3 metal vibration damper installation holes 15, and the installation and the fixation of the 4 metal vibration dampers on the vibration damper installation holes 15 are completed;
5) Adjusting the assembly position and angle of the fixed support plate 31;
6) The standard components of M12 multiplied by 90 bolts 24 conforming to GB/T70.1 penetrate through the 2 matched fixed support plates 31 and the limit sleeve 21 of the metal damper and are matched with the nuts 25, and the 2 fixed support plates 31 are connected with the metal damper, namely, the fixed support plates 31 are arranged on the M-shaped bracket 1;
7) The whole body after the connection of the step 6) is placed in an engine fixing area, and is connected with a fixing structure of the engine by using bolts 24 through the second mounting holes 312 of the fixing support plate 31, and the fixing device with the control instrument device 01 suspended is mounted in the engine fixing area.
The instantaneous impact generated during the starting of the engine is transmitted to the metal vibration dampers by the fixed support plates 31 at the two sides of the vibration dampers 2 through the bolts 24, and the M-shaped support 1 uses the T-shaped beam structure to connect the vibration damper mounting holes 15 in pairs, so that the impact load can be uniformly distributed on the four metal vibration dampers due to the high rigidity of the whole structure, and the vibration dampers 2 synchronously deform to attenuate the impact energy, thereby achieving the effect of reducing the impact magnitude. Meanwhile, in the impact direction, the M-shaped support 1 and the control instrument device 01 are provided with two contact surfaces, so that impact load can be uniformly transmitted to the bearing frame of the chassis, and therefore, an integrated circuit board, an electric connector, welding spots, a chip and the like in the chassis do not need to directly bear larger impact load.
The high-frequency random vibration generated during normal operation of the engine is transmitted to the four vibration absorbers 2 through the fixed support plate 31, and the working states of the vibration absorbers 2 are inconsistent due to the randomness of the vibration, so that the vibration transmitted to the vibration absorbers 2 also presents disorder. The M-shaped bracket 1 of the embodiment utilizes the structural rigidity of the bracket to coordinate the working states of the four vibration absorbers 2 on one hand, and on the other hand, loads and deformations caused by inconsistent working states of the vibration absorbers 2 are born by the structure of the bracket; as a result, the vibration energy intensity of the instrument box body is greatly weakened, and the normal operation of the control instrument device 01 is ensured.
The above description is only of the preferred embodiments of the present invention, and the technical solution of the present invention is not limited thereto, and any modifications made by those skilled in the art based on the main technical concept of the present invention are included in the technical scope of the present invention.
Claims (7)
1. A wall-mounted vibration reduction fixing device of control instrument equipment for an engine is 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 longer 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; a containing 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 and controlling the instrument (01);
the two connecting lugs (11) are arranged on the bottom surface of the lower supporting plate (12) side by side and are respectively positioned at the left end and the right end of the lower supporting plate (12) and 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 2 connecting lugs (11) on the upper positioning plate (13) is smaller than the distance between the 2 connecting lugs (11) on the lower supporting plate (12);
each connecting lug (11) is provided with a damper mounting hole (15), the damper mounting holes (15) of 2 connecting lugs (11) on the lower supporting plate (12) are coaxial, and the damper mounting holes (15) of 2 connecting lugs (11) on the upper positioning plate (13) are coaxial;
the 4 vibration dampers (2) are respectively arranged in the vibration damper mounting holes (15) of the 4 connecting lugs (11);
one end of each of the 4 connecting components (3) is respectively arranged on the 4 shock absorbers (2), and the other end of each of the 4 connecting components is connected with the engine;
the vibration damper (2) comprises a limit sleeve (21), a limit gasket (22) and 2 metal vibration damping pads (23) which are oppositely arranged;
the 2 metal vibration reduction pads (23) are in a step shape, the large ends (231) of the 2 metal vibration reduction pads (23) are respectively positioned at two sides of the connecting lug (11), and the small ends (232) are respectively arranged in the vibration absorber mounting holes (15); the limiting sleeve (21) is arranged on the 2 metal vibration reduction pads (23) in a penetrating way, both ends of the limiting sleeve extend out of the metal vibration reduction 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 the limiting gasket (22);
every coupling assembling (3) is including 2 fixed extension board (31), and the one end of 2 fixed extension board (31) all is equipped with first mounting hole (311), and the other end all is equipped with second mounting hole (312) that are used for being connected with the engine, passes first mounting hole (311) of one of them fixed extension board (31), the centre bore of spacing sleeve (21), the first mounting hole (311) of another fixed extension board (31) in proper order through bolt (24) to be connected with nut (25), realize coupling assembling (3) and the fixed of shock absorber (2).
2. The wall-mounted vibration damping fixing device for an engine control instrument device according to claim 1, wherein: the 4 connecting lugs (11) are arranged in an isosceles trapezoid.
3. The wall-mounted vibration damping fixing device for an engine control instrument device according to claim 2, wherein: the bolts (24) are sleeved with 2 washers (26) which are respectively positioned between the fixed support plate (31) and the heads of the bolts (24) and between the limiting gaskets (22) and the nuts (25).
4. A wall-mounted vibration damping fixing device for an engine control apparatus according to claim 3, characterized in that: 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 the diameter of the second through hole (152);
the small end (232) of each metal vibration reduction 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 reduction 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 holes (152).
5. The wall-mounted vibration damping fixing device for the control instrument and equipment for the engine according to claim 4, wherein: the metal vibration reduction pad (23) is made of metal rubber;
the connecting lug (11), the lower supporting plate (12), the upper positioning plate (13) and the connecting beam (14) are integrally designed, and are made of high-strength titanium alloy materials.
6. The wall-mounted vibration damping fixing device for the control instrument and equipment for the engine according to claim 5, wherein: the second mounting hole (312) on each fixed support plate (31) is a waist-shaped hole.
7. The wall-mounted vibration damping fixing device for an engine control instrument device according to claim 6, wherein: weight reducing 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).
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| Application Number | Priority Date | Filing Date | Title |
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| 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 CN114440099A (en) | 2022-05-06 |
| CN114440099B true 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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| JP2010133434A (en) * | 2008-12-02 | 2010-06-17 | Tosetz Co Ltd | Wall-mounted vibration damping device |
| CN206743480U (en) * | 2017-05-05 | 2017-12-12 | 新昌县恩喜电器有限公司 | A kind of wall-mounted stereo set of outdoor |
| 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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2021
- 2021-12-15 CN CN202111538952.5A patent/CN114440099B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2010133434A (en) * | 2008-12-02 | 2010-06-17 | Tosetz Co Ltd | Wall-mounted vibration damping device |
| CN206743480U (en) * | 2017-05-05 | 2017-12-12 | 新昌县恩喜电器有限公司 | A kind of wall-mounted stereo set of outdoor |
| 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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| CN114440099A (en) | 2022-05-06 |
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