Noise reduction and heat insulation device for internal combustion engine
By designing sound-absorbing panels, heat insulation panels, air-cooling devices, and multi-stage mufflers on internal combustion engines, the problems of high noise and poor heat insulation in internal combustion engines have been solved, achieving effective noise reduction and heat dissipation, and improving engine lifespan and efficiency.
Patent Information
- Application Number
- CN202520262608.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing internal combustion engines are noisy and have poor heat insulation during operation. Current technologies cannot effectively reduce intake noise and affect engine cooling.
A sound-absorbing and heat-insulating device for internal combustion engines was designed, comprising a sound-absorbing panel, a heat-insulating panel, an air-cooling device, a multi-stage muffler, and a damping shock absorber. By separating heat, reducing noise, absorbing vibration, and performing multi-stage noise reduction, combined with sound insulation materials and an air-cooling system, it achieves effective heat insulation and noise reduction.
It significantly reduces noise and temperature during internal combustion engine operation, improves heat dissipation efficiency, reduces the impact of vibration on the engine frame, and ensures engine lifespan and efficiency.
Smart Images
Figure CN223806211U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to internal combustion engine technical field, specifically, relate to a kind of sound-absorbing heat insulation device for internal combustion engine. BACKGROUND
[0002] At present, with the continuous popularity of automobile, various agricultural machinery and engineering machinery, internal combustion engine is widely used as a power element, but is limited by its working principle, it has two important defects, namely noise and heating, which will have negative effects on engine itself, other components, natural environment and staff.
[0003] Therefore, to solve this problem, technical personnel usually increase muffler on its exhaust pipe, cover heat insulation material on the surface of internal combustion engine.
[0004] But this traditional way can only weaken the noise generated by engine exhaust pipe, and the effect is not significant, cannot weaken the noise generated by engine air inlet and itself vibration. Covering heat insulation material on the surface protects the components outside the engine, but also affects the heat dissipation of the engine.
[0005] Summarized above, there are the following problems in the prior art:
[0006] 1, the noise of internal combustion engine in the prior art is large during working, which can cause many problems to the engine itself and the surrounding environment, in addition, the prior art generally adopts increasing muffler on exhaust pipe to reduce noise, but only can reduce the noise of exhaust pipe, cannot reduce the noise generated by air inlet of engine and itself.
[0007] 2, the internal combustion engine in the prior art generates a lot of heat during working, and the heat can affect the service life of other components, and the prior art often covers heat insulation material on the surface of internal combustion engine to isolate heat, but this can affect the heat dissipation of internal combustion engine, cause the temperature in internal combustion engine to continuously rise, affect service life and use efficiency. UTILITY MODEL CONTENTS
[0008] The utility model provides a kind of sound-absorbing heat insulation device for internal combustion engine, solve the problems of large noise and poor heat insulation effect in the related art.
[0009] The technical scheme of the utility model is as follows:
[0010] In order to achieve the above object, the utility model provides the following technical scheme: A silencing and heat insulation device for internal combustion engine, including the shell, the inner wall of the shell is provided with through slot one, through slot two and through slot three respectively, the inner wall of through slot one is welded with installation branch, the inside of installation branch is provided with installation groove, the inside of installation groove is fixedly connected with rack through screw, the top of rack is installed four rectangular array uniform distribution's damping shock absorber, the top of two damping shock absorber is fixedly connected with engine base through screw, the top of two engine base is installed with engine body in common,
[0011] The inside of installation branch is welded with filter, the shape of filter is funnel, one side of smaller end of filter is fixedly connected with filter screen frame through screw, the inside of filter screen frame is provided with filter screen, one side of engine body is provided with air inlet, the larger end of filter is welded on one side of air inlet, the inside of filter is provided with communication groove, the engine body is connected with outside through filter,
[0012] The inside of installation branch is provided with bellows, one side of engine body is provided with air outlet, the bellows and air outlet are communicated,
[0013] The inside of through slot two is installed with silencer one and silencer two respectively, silencer one and silencer two are rectangular array uniform distribution, the output end of silencer one and the input end of silencer two are connected with connecting pipe in common, the inside of silencer one and silencer two is communicated through connecting pipe in common,
[0014] The input end of silencer one and the output end of bellows are connected with air guide pipe in common, the inside of silencer and bellows is communicated through air guide pipe in common, air guide pipe passes through the inside of installation branch,
[0015] The output end of silencer two is connected with exhaust pipe, exhaust pipe passes through the shell, the inside of exhaust pipe and silencer two is communicated, silencer two is communicated with outside through exhaust pipe.
[0016] Preferably, the outer circumferential surface of the bellows, the silencer one and the silencer two is provided with a heat insulation protective sleeve, the heat insulation protective sleeve is made of glass fiber, the heat insulation protective sleeve is provided with an aluminum foil layer on the position surface, the aluminum foil layer is made of aluminum foil paper.
[0017] Preferably, the inside of the mounting plate is provided with a forced air cooling device, the forced air cooling device comprises a funnel-shaped air guide part and a communicating part on the top of the air guide part, the air guide part and the communicating part are communicated, the mounting slot is communicated with the through slot one through the forced air cooling device, and the inside of the air guide part is provided with an air inlet fan.
[0018] Preferably, a partition plate is welded on the bottom wall of the through slot three, a heat insulation plate is welded on the bottom of the partition plate, a sound absorbing plate is welded on the inner wall of the mounting slot, the sound absorbing plate, the heat insulation plate and the partition plate are all provided with a plurality of internal ventilation holes in a rectangular array, and the through slot three is communicated with the mounting slot through the internal ventilation holes.
[0019] Preferably, a plurality of external ventilation holes in a rectangular array are arranged in the inside of the shell, and the through slot one, the through slot two and the through slot three are all communicated with the outside through the external ventilation holes.
[0020] Preferably, an oil tank is arranged in the through slot three, one end of an oil guide pipe is connected with the output end of the oil tank, and the other end of the oil guide pipe penetrates through one of the internal ventilation holes and is communicated with the input end of the engine body.
[0021] The working principle and beneficial effects of the utility model are as follows:
[0022] 1. The sound absorbing plate and the heat insulation plate are arranged, the engine and other components are successfully separated, the heat generated during the operation of the engine is effectively isolated, the adverse effects of heat accumulation on other components are avoided, meanwhile, the arrangement of the forced air cooling device ensures that the engine is effectively cooled without affecting the heat insulation effect.
[0023] 2. The heat insulation protective sleeve is arranged on the outer surface of the corrugated pipe and the muffler, and the muffler is arranged separately, so that the temperature backflow is effectively prevented, and the cooling effect of the engine body is further ensured.
[0024] 3. The filter air inlet is designed in a horn shape, the double-layer structure and the sound insulation material are combined, the noise caused by excessive air flow rate is significantly reduced, and the effective noise reduction treatment of the air inlet is realized.
[0025] 4. The damper shock absorber is arranged at the bottom of the engine, the vibration generated during the operation of the engine is effectively absorbed, and the vibration is prevented from being transmitted to the rack, so that the vibration and the noise caused by the vibration are significantly reduced.
[0026] 5. The utility model discloses a corrugated pipe and multistage muffler are added on the exhaust pipe, realized primary noise reduction and multistage noise reduction effect, ensured the noise reduction effect, and the output power loss of engine is reduced to the maximum extent. In addition, the design of multistage muffling makes the exhaust pipe highly integrated, improves the space utilization. BRIEF DESCRIPTION OF DRAWINGS
[0027] The utility model will be further explained in detail below in combination with the drawings and specific embodiments.
[0028] Fig. 1 It is the side sectional view of the utility model;
[0029] Fig. 2 It is the internal structure schematic view of the utility model;
[0030] Fig. 3 It is the filter structure schematic view of the utility model.
[0031] In the drawing: 1, shell, 2, external vent, 3, through groove one, 4, through groove two, 5, through groove three, 6, install support board, 7, air cooling device, 8, filter, 9, engine body, 10, corrugated pipe, 11, muffler one, 12, muffler two, 13, heat insulation protective sleeve, 14, oil tank, 15, internal vent, 16, heat insulation board, 17, sound absorption board, 18, partition board, 19, rack, 20, damping shock absorber, 21, engine base. DETAILED DESCRIPTION
[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are involved in the protection scope of the utility model.
[0033] As Figs. 1-3 Shown, this embodiment proposes a kind of muffling heat insulation device for internal combustion engine, including shell 1, the inner wall of through groove one 3 of shell 1 is separately provided with through groove two 4 and through groove three 5, installation support board 6 is welded on the inner wall of through groove one 3, installation groove is set in the inside of installation support board 6, rack 19 is fixedly connected in the inside of installation groove by screw, four rectangular array uniform distribution damping shock absorber 20 are installed on the top of rack 19, two damping shock absorbers 20 top are jointly fixedly connected by screw and have engine base 21, two engine bases 21 top are jointly installed and have engine body 9;
[0034] The inside of the mounting plate 6 is welded with a filter 8, the filter 8 is funnel-shaped, one side of the smaller end of the filter 8 is fixedly connected with a filter screen frame by a screw, the inside of the filter screen frame is provided with a filter screen, one side of the engine body 9 is provided with an air inlet, the larger end of the filter 8 is welded on one side of the air inlet, the inside of the filter 8 is provided with a communication groove, the engine body 9 is connected with the outside through the filter 8;
[0035] The inside of the mounting plate 6 is provided with a bellows 10, one side of the engine body 9 is provided with an air outlet, the bellows 10 is connected with the air outlet;
[0036] The inside of the through groove two 4 is respectively provided with a silencer one 11 and a silencer two 12, the silencer one 11 and the silencer two 12 are evenly distributed in a rectangular array, the output end of the silencer one 11 and the input end of the silencer two 12 are commonly connected with a connecting pipe, the inside of the silencer one 11 and the silencer two 12 are commonly connected through the connecting pipe;
[0037] The input end of the silencer one 11 and the output end of the bellows 10 are commonly connected with a gas guide pipe, the inside of the silencer and the bellows 10 are commonly connected through the gas guide pipe, the gas guide pipe passes through the inside of the mounting plate 6;
[0038] The output end of the silencer two 12 is connected with an exhaust pipe, the exhaust pipe passes through the shell 1, the inside of the exhaust pipe and the silencer two 12 are connected, the silencer two 12 is connected with the outside through the exhaust pipe.
[0039] As shown in Figs. 1-3 The outer circumferential surface of the bellows 10, the silencer one 11 and the silencer two 12 is provided with a heat insulation protective sleeve 13, the heat insulation protective sleeve 13 is made of glass fiber, the position surface of the heat insulation protective sleeve 13 is provided with an aluminum foil layer, the aluminum foil layer is made of aluminum foil paper.
[0040] As shown in Figs. 1-3 The inside of the mounting plate 6 is provided with an air cooling device 7, the air cooling device 7 includes a funnel-shaped air guide part and a communication part located at the top of the air guide part, the air guide part and the communication part are connected, the mounting groove is connected with the through groove one 3 through the air cooling device 7, the inside of the air guide part is provided with an air inlet fan;
[0041] The bottom wall of the through groove three 5 is welded with a partition plate 18, the bottom of the partition plate 18 is welded with a heat insulation plate 16, the inner wall of the mounting groove is welded with a sound absorption plate 17, the inside of the sound absorption plate 17, the heat insulation plate 16 and the partition plate 18 are provided with a plurality of internal ventilation holes 15 which are evenly distributed in a rectangular array, the through groove three 5 is connected with the mounting groove through the internal ventilation holes;
[0042] The inside of the shell 1 is provided with a plurality of external ventilation holes 2 which are evenly distributed in a rectangular array, the through groove one 3, the through groove two 4 and the through groove three 5 are connected with the outside through the external ventilation holes 2.
[0043] The inner part of the through slot three 5 is provided with an oil tank 14, the output end of the oil tank 14 is connected with one end of an oil guide pipe, the other end of the oil guide pipe passes through one of the inner ventilation holes 15 and is connected with the input end of the engine body 9.
[0044] In this embodiment, firstly, at the connecting part of the mounting plate 6 and the through slot one 3 and the through slot two 4, the sound absorption plate 17 and the heat insulation plate 16 are arranged, so as to effectively separate the engine body 9 from the oil tank 14, the muffler and other components, and good isolation of the heat generated during the operation of the engine can be achieved, so as to avoid the adverse effects of heat accumulation on other components.
[0045] In addition, when the engine body 9 is started, the air inlet fan in the air cooling device 7 is synchronously operated, cold air is sucked from the inner part of the through slot one 3 and is delivered to the surrounding of the engine body 9 in the inner part of the mounting plate 6, the cold air takes away heat when contacting with the engine body 9, and then the hot air is discharged through the plurality of inner ventilation holes 15 and new cold air is continuously injected, so that effective heat dissipation of the inner part of the engine body 9 is achieved without affecting the heat insulation effect.
[0046] Further, the heat insulation protective sleeves 13 are respectively arranged on the outer surfaces of the corrugated pipes 10, the muffler one 11 and the muffler two 12, and the muffler one 11 and the muffler two 12 are separately arranged in the through slot two 4, so as to effectively prevent temperature backflow and ensure the heat dissipation effect of the engine body 9 in the inner part of the through slot one 3.
[0047] In terms of the air inlet, the filter 8 air inlet with a horn-shaped design can well disperse the entering airflow, reduce the flow rate, and thus reduce the noise generated due to the excessive air flow rate. Meanwhile, the filter 8 adopts a double-layer structure, and sound insulation material is filled in the middle, so that when the air inlet noise causes the inner wall to vibrate, the sound insulation material can effectively prevent the noise from spreading outward, and the noise reduction treatment of the air inlet is achieved.
[0048] For the vibration problem generated during the operation of the engine, the damper shock absorber 20 is arranged at the bottom of the engine body 9 to absorb the vibration, so as to prevent the vibration from being transmitted to the frame 19 through the engine base 21, and thus the vibration and the noise caused thereby are significantly reduced.
[0049] Finally, in terms of the exhaust port noise control, the corrugated pipe 10 and the multi-stage muffling are added to the exhaust pipe. The corrugated pipe 10 can absorb the vibration generated during the operation of the exhaust system, and thus the primary noise reduction is achieved. Then, through the series connection of two or more mufflers, the multi-stage noise reduction effect is achieved. This design ensures the noise reduction effect while minimizing the output power loss of the engine. Meanwhile, the multi-stage muffling design makes the exhaust pipeline highly integrated, and improves the space utilization.
[0050] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A sound-deadening and heat-insulating device for an internal combustion engine, characterized by comprising: Including the shell (1), the inner part of the shell (1) is respectively provided with a through slot one (3), a through slot two (4) and a through slot three (5), the inner wall of the through slot one (3) is welded with a mounting branch plate (6), the inside of the mounting branch plate (6) is provided with a mounting groove, the inside of the mounting groove is fixedly connected with a rack (19) through a screw, the top of the rack (19) is provided with four damping shock absorbers (20) which are evenly distributed in a rectangular array, the top of two damping shock absorbers (20) is fixedly connected with an engine base (21) through a screw, the top of two engine bases (21) is commonly provided with an engine body (9); The inside of the mounting branch plate (6) is welded with a filter (8), the shape of the filter (8) is funnel-shaped, one side of the smaller end of the filter (8) is fixedly connected with a filter screen frame through a screw, the inside of the filter screen frame is provided with a filter screen, one side of the engine body (9) is provided with an air inlet, the larger end of the filter (8) is welded on one side of the air inlet, the inside of the filter (8) is provided with a communication groove, the engine body (9) is connected with the outside through the filter (8). The inside of the mounting branch plate (6) is provided with a bellows (10), one side of the engine body (9) is provided with an air outlet, the bellows (10) is connected with the air outlet. The inside of the through slot two (4) is respectively provided with a silencer one (11) and a silencer two (12), the silencer one (11) and the silencer two (12) are evenly distributed in a rectangular array, the output end of the silencer one (11) and the input end of the silencer two (12) are commonly connected with a connecting pipe, the inside of the silencer one (11) and the silencer two (12) is commonly connected through the connecting pipe. The input end of the silencer one (11) and the output end of the bellows (10) are commonly connected with a gas guide pipe, the inside of the silencer and the bellows (10) is commonly connected through the gas guide pipe, the gas guide pipe passes through the inside of the mounting branch plate (6). The output end of the silencer two (12) is connected with an exhaust pipe, the exhaust pipe passes through the shell (1), the inside of the exhaust pipe and the silencer two (12) is connected, the silencer two (12) is connected with the outside through the exhaust pipe.
2. The sound-deadening and heat-insulating device for an internal combustion engine according to claim 1, characterized by The outer circumferential surface of the bellows (10), the silencer one (11) and the silencer two (12) is provided with a heat insulation protective sleeve (13), the heat insulation protective sleeve (13) is made of glass fiber, the position surface of the heat insulation protective sleeve (13) is provided with an aluminum foil layer, the aluminum foil layer is made of aluminum foil paper.
3. The sound-deadening and heat-insulating device for an internal combustion engine according to claim 2, characterized by The inside of the mounting branch plate (6) is provided with an air cooling device (7), the air cooling device (7) comprises a funnel-shaped air guide part and a communication part located at the top of the air guide part, the air guide part and the communication part are connected, the mounting groove is connected with the through slot one (3) through the air cooling device (7), the inside of the air guide part is provided with an air inlet fan.
4. The sound-deadening and heat-insulating device for an internal combustion engine according to claim 3, characterized by The bottom wall of the through slot three (5) is welded with a partition plate (18), the bottom of the partition plate (18) is welded with a heat insulation plate (16), the inner wall of the mounting slot is welded with a sound absorption plate (17), the sound absorption plate (17), the heat insulation plate (16) and the partition plate (18) are internally provided with a plurality of internal ventilation holes (15) which are evenly distributed in a rectangular array, and the through slot three (5) is communicated with the mounting slot through the internal ventilation holes.
5. The sound-deadening and heat-insulating device for an internal combustion engine according to claim 4, characterized by The inside of the shell (1) is provided with a plurality of external ventilation holes (2) which are evenly distributed in a rectangular array, and the through slot one (3), the through slot two (4) and the through slot three (5) are communicated with the outside through the external ventilation holes (2).
6. The sound-deadening and heat-insulating device for an internal combustion engine according to claim 5, characterized by The through slot three (5) is internally provided with an oil tank (14), one end of an oil guide pipe is connected with the output end of the oil tank (14), the other end of the oil guide pipe penetrates through one of the internal ventilation holes (15) and is communicated with the input end of the engine body (9).