CN213711200U - Negative pressure type carburetor type gasoline engine oil supply mechanism - Google Patents
Negative pressure type carburetor type gasoline engine oil supply mechanism Download PDFInfo
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- CN213711200U CN213711200U CN202022863867.3U CN202022863867U CN213711200U CN 213711200 U CN213711200 U CN 213711200U CN 202022863867 U CN202022863867 U CN 202022863867U CN 213711200 U CN213711200 U CN 213711200U
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- carburetor
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- 239000010711 gasoline engine oil Substances 0.000 title claims abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 64
- 239000000446 fuel Substances 0.000 claims abstract description 41
- 210000000867 larynx Anatomy 0.000 claims 2
- 239000010705 motor oil Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000000295 fuel oil Substances 0.000 description 8
- 230000007547 defect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a negative pressure type carburetor type gasoline engine oil supply mechanism, belonging to the technical field of engine oil supply; a negative pressure type carburetor type gasoline engine oil supply mechanism comprises a body, wherein the bottom of the body is provided with an oil inlet pipe hole; the negative pressure adjusting device is arranged at the lower part of the carburetor body, fuel in the pump oil cover chamber is uniformly distributed horizontally, negative pressure is generated at the fuel side of the adjusting diaphragm, the needle valve diaphragm assembly moves upwards under the atmospheric pressure at the opposite side and acts on the needle valve rocker arm to overcome the pressure of the needle valve spring, so that oil in the pump oil chamber passes through the needle valve seat, the needle valve is opened to enter the main fuel chamber, and the phenomena of reducing the abrasion service life of a part mechanism, deforming and clamping stagnation caused by the inclined overturn of the part mechanism under the external force in the fuel chamber, causing poor fuel supply of the carburetor and the like are avoided, thereby ensuring that the engine cannot close an oil path due to full oil and leaked oil under the conditions of bumping and vibration.
Description
Technical Field
The invention relates to the technical field of engine oil supply, in particular to a negative pressure type carburetor type gasoline engine oil supply mechanism.
Background
The gasoline engine uses gasoline as fuel, and can convert internal energy into kinetic energy, and because the gasoline is small in viscosity and quick in evaporation, the gasoline can be injected into cylinder by means of gasoline injection system, and after the gasoline is compressed to a certain temp. and pressure, it can be ignited by means of spark plug, and the gas can be expanded to apply work.
The small carburetor engine on the market at present is basically characterized in that an oil tank is arranged at the upper part of a carburetor, most of the small carburetor engine is a traditional float carburetor, and oil inlet amount is controlled by utilizing the height of a float surface (oil level) through a float and a needle valve assembly in a float chamber to balance oil supply to the carburetor; when the engine is in the bumping and vibrating condition, the oil level in the float chamber can fluctuate to drive the float to rock, the sealing needle valve component is forcibly opened, the oil circuit of the carburetor cannot be closed, the oil level is raised, and the oil leakage (full oil) phenomenon is generated; meanwhile, the needle valve assembly is easy to clamp hairs due to impurities in fuel oil, cannot seal an oil way, causes the problems that a carburetor is full of oil, an engine is flamed out and cannot work, and is easy to cause safety accidents such as fire disasters.
Disclosure of Invention
The invention aims to solve the problems that the prior small carburetor engine is basically provided with an oil tank at the upper part of a carburetor, most of the prior small carburetor engine is a traditional float carburetor, and oil feeding amount is controlled by utilizing the height of a float surface (oil level) to balance oil feeding amount and supply oil to the carburetor through a float and a needle valve assembly in a float chamber; when the engine is in the bumping and vibrating condition, the oil level in the float chamber can fluctuate to drive the float to rock, the sealing needle valve component is forcibly opened, the oil circuit of the carburetor cannot be closed, the oil level is raised, and the oil leakage (full oil) phenomenon is generated; meanwhile, the needle valve assembly is easy to generate hairpin due to impurities in fuel oil, cannot seal an oil way, cause the problems that a carburetor is full of oil, an engine is flameout and cannot work, and safety accidents such as fire disasters are easy to cause, and the negative pressure type carburetor type gasoline engine oil supply mechanism is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a carburetor type gasoline engine fuel feeding mechanism of negative pressure formula, includes the body, the inlet tube is installed to the bottom of body, the balancing hole is installed to the rear side of body, the inner chamber of body is provided with the negative pressure fuel pump, needle valve diaphragm assembly is installed to the inner chamber of body, needle valve diaphragm assembly is located the upper portion of negative pressure fuel pump, the inner chamber of body is provided with main fuel chamber, needle valve diaphragm assembly is located main fuel chamber, the upper portion of main fuel chamber is provided with the needle valve rocking arm, the inner chamber of body is provided with the needle valve seat, the needle valve is installed to the inner chamber of needle valve seat, the bottom of needle valve links to each other with the other end of needle valve rocking arm, the top of needle valve rocking arm is provided with the needle valve spring, the top of needle valve spring is connected on the inner chamber of body, the inner chamber of body is, the upper portion of the body is provided with a throat, the top of the main jet pipe penetrates through the throat and extends upwards, a throttle valve sheet is arranged in the inner cavity of the body, and a negative pressure channel pipe is arranged in the inner cavity of the body.
Preferably, a throttle valve is drilled at the front side of the body, and the throttle blade is positioned in the throttle valve.
Preferably, the top of the negative pressure channel pipe is provided with a pressure taking port.
Preferably, the inner cavity of body is dug a groove, the inner cavity fixedly connected with circular fixture block of groove, the needle valve spring cup joints the lateral wall at circular fixture block.
Preferably, the bottom of needle valve is provided with the connecting rod, the bottom of connecting rod is provided with the grip block, the needle valve rocking arm is located grip block and needle valve bottom looks side.
Preferably, an idle metering orifice is arranged in the body, and the main fuel chamber is respectively communicated with the idle metering orifice, the main jet and the oil inlet pipe.
Compared with the prior art, the invention provides a negative pressure type carburetor type gasoline engine oil supply mechanism, which has the following beneficial effects:
aiming at the defects, the scheme is designed as follows: aiming at the defects, the negative pressure fuel pump oil supply mode is provided, the negative pressure of an engine is utilized to realize oil inlet, the negative pressure adjusting device is arranged at the lower part of the carburetor body, the fuel oil in the pump oil cover chamber is uniformly distributed horizontally, the negative pressure is generated at the fuel oil side of the adjusting diaphragm, the needle valve diaphragm assembly moves upwards under the atmospheric pressure at the opposite side and acts on the needle valve rocker arm to overcome the pressure of a needle valve spring, so that the oil in the pump oil chamber passes through the needle valve seat, the needle valve is opened to enter the main fuel oil chamber, the phenomena of shortening the abrasion service life of a part mechanism, deformation and clamping stagnation caused by the inclined overturn of the fuel oil chamber under the external force are avoided, the poor oil supply of the carburetor and the like are avoided, and the engine cannot normally work due to the fact.
Drawings
Fig. 1 is a schematic structural diagram of a negative pressure type carburetor type gasoline engine fuel supply mechanism according to the present invention;
fig. 2 is a left side view of a negative pressure type carburetor type gasoline engine fuel supply mechanism according to the present invention;
fig. 3 is an enlarged view of a portion a of a negative pressure type carburetor gasoline engine fuel supply mechanism 1 according to the present invention.
In the figure: 1. a body; 2. a main nozzle; 3. a main orifice; 4. a needle valve seat; 5. a needle valve; 6. a needle valve spring; 7. a needle valve rocker arm; 8. a main fuel chamber; 9. a needle valve diaphragm assembly; 10. a negative pressure fuel pump; 11. an oil inlet pipe; 12. a balance hole; 13. a negative pressure passage tube; 14. a throttle flap; 15. a laryngeal opening; 16. and a pressure taking port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-3, a negative pressure carburetor type gasoline engine oil supply mechanism comprises a body 1, an oil inlet pipe 11 is installed at the bottom of the body 1, a balance hole 12 is installed at the rear side of the body 1, a negative pressure fuel pump 10 is arranged in the inner cavity of the body 1, a needle valve diaphragm assembly 9 is installed in the inner cavity of the body 1, the needle valve diaphragm assembly 9 is located at the upper part of the negative pressure fuel pump 10, a main fuel chamber 8 is arranged in the inner cavity of the body 1, a needle valve rocker arm 7 is arranged at the upper part of the main fuel chamber 8, a needle valve seat 4 is arranged in the inner cavity of the body 1, a needle valve 5 is installed in the inner cavity of the needle valve seat 4, the bottom of the needle valve 5 is connected with the other end of the needle valve rocker arm 7, a needle valve spring 6 is arranged at the top of the needle valve 7, the top of the needle valve, the inner cavity of the main metering orifice 3 is provided with a main metering orifice 2, a throat 15 is formed in the upper portion of the body 1, the top of the main metering orifice 2 penetrates through the throat 15 and extends upwards, a throttle valve sheet 14 is arranged in the inner cavity of the body 1, a negative pressure channel pipe 13 is arranged in the inner cavity of the body 1, a throttle valve is formed in the front side of the body 1, the throttle valve sheet 14 is located in the throttle valve, a pressure taking port 16 is formed in the top of the negative pressure channel pipe 13 in a chiseling mode, a groove is formed in the inner cavity of the body 1, a circular clamping block is fixedly connected to the inner cavity of the groove, the needle valve spring 6 is sleeved on the outer side wall of the circular clamping block, a connecting rod is arranged at the bottom of the needle valve 5, a clamping block is arranged at the bottom of the connecting rod, the needle valve rocker arm 7 is located on the side of the bottom of the clamping block and the needle.
The working principle is as follows: when the engine is started, the suction (negative pressure) generated by the engine is used for negatively pressing the fuel pump 10, the needle valve seat 4 and the main fuel chamber 8 of the needle valve 5 through the fuel inlet pipe 11, the idle metering hole oil outlet hole, the transition hole, the main metering hole 3 and the main fuel pipe 2, negative pressure is generated on the fuel side of the needle valve diaphragm assembly 9, the needle valve diaphragm assembly 9 moves upwards under the atmospheric pressure on the opposite side, the needle valve diaphragm assembly 9 acts on the needle valve diaphragm assembly 9, the pressure of the needle valve spring 6 is overcome, the oil of the negative pressure fuel pump 10 passes through the needle valve seat 4, the needle valve 5 is opened to enter the main fuel chamber 8, the oil passes through the idle oil hole, the main metering hole 3 and the main fuel pipe 2 upwards to enter the engine, the throttle valve is basically closed when the engine is idle, the fuel enters the engine from the idle oil outlet through the mixing ratio adjusting needle screw hole, the opening, when the pressure of the throat 15 is lower than the pressure in the main fuel chamber 8, oil flows out of the main metering orifice 3, enters air flow through the main spray pipe 2 and flows to the engine oil inlet pipe 11, the oil supply amount is regulated by the main metering orifice 3, the air speed flowing through the throat 15 is increased along with the further opening of the throttle from the transitional position to the fully opened position, the oil flow is increased along with the requirement of engine load, the action of the needle valve diaphragm assembly 9 is the same as that described previously, and the pressure change acting on the diaphragm is realized through the main metering orifice 3 and the main spray pipe 2.
The negative pressure of the engine is utilized to realize oil inlet, fuel oil in the pump oil cover chamber is uniformly distributed horizontally, and the phenomena that the wear life of a part mechanism is shortened, the deformation and the clamping stagnation are reduced due to the inclined overturn of the fuel oil chamber by external force, the oil supply of a carburetor is poor and the like are avoided, so that the oil way is opened to ensure the oil supply of the engine under any working condition; the engine is prevented from being in the condition of bumping and vibrating without a floater mechanism; the phenomena of full oil, oil leakage and the like caused by incapability of closing an oil way can be avoided, and the stable work of the engine under the vibration and bumping conditions is ensured; the disadvantage of insufficient oil supply safety of the float chamber carburetor is solved. The carburetor is designed, the negative pressure is used for controlling the oil pumping quantity to supply oil to the carburetor, the engine can normally and stably work under the conditions of jolt and vibration, the liquid level can be kept constant, the oil consumption is reduced, the defects and the stability of the carburetor are greatly improved, and the oil leakage caused by full oil and the occurrence of safety accidents such as engine flameout and fire disasters can be avoided because the oil way cannot be closed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides a carburetor type gasoline engine fuel feeding mechanism of negative pressure formula, includes body (1), its characterized in that: an oil inlet pipe (11) is installed at the bottom of the body (1), a balance hole (12) is installed at the rear side of the body (1), a negative pressure fuel pump (10) is arranged in an inner cavity of the body (1), a needle valve diaphragm assembly (9) is installed in the inner cavity of the body (1), the needle valve diaphragm assembly (9) is located on the upper portion of the negative pressure fuel pump (10), a main fuel chamber (8) is arranged in the inner cavity of the body (1), the needle valve diaphragm assembly (9) is located in the main fuel chamber (8), a needle valve rocker arm (7) is arranged on the upper portion of the main fuel chamber (8), a needle valve seat (4) is arranged in the inner cavity of the body (1), a needle valve (5) is installed in the inner cavity of the needle valve seat (4), the bottom of the needle valve (5) is connected with the other end of the needle valve rocker arm (7), a needle valve spring (, the top of needle valve spring (6) is connected on the inner chamber of body (1), the inner chamber of body (1) is opened and is chiseled there is main graduated flask (3), the inner chamber of main graduated flask (3) is provided with main venturi tube (2), the upper portion of body (1) is opened and is chiseled there is larynx mouth (15), the top of main venturi tube (2) is run through larynx mouth (15) and is upwards extended, the inner chamber of body (1) is provided with throttle valve piece (14), the inner chamber of body (1) is provided with negative pressure passageway pipe (13).
2. The negative pressure type carburetor type gasoline engine fuel supply mechanism according to claim 1, wherein a throttle valve is bored at a front side of the body (1), and the throttle plate (14) is located in the throttle valve.
3. The negative pressure type carburetor type gasoline engine oil supply mechanism according to claim 1, wherein the negative pressure passage pipe (13) is bored at the top thereof with a pressure taking port (16).
4. The negative pressure type carburetor type gasoline engine oil supply mechanism according to claim 1, wherein a groove is formed in an inner cavity of the body (1), a circular fixture block is fixedly connected to the inner cavity of the groove, and the needle valve spring (6) is sleeved on the outer side wall of the circular fixture block.
5. The negative pressure type carburetor-type gasoline engine oil supply mechanism according to claim 1, characterized in that a connecting rod is disposed at the bottom of the needle valve (5), a clamping block is disposed at the bottom of the connecting rod, and the needle valve rocker arm (7) is located at the side of the clamping block viewed from the bottom of the needle valve (5).
6. The negative pressure type carburetor-type gasoline engine fueling mechanism according to claim 1, wherein the main body (1) is provided therein with an idle rate hole, and the main fuel chamber (8) is communicated with the idle rate hole, the main rate hole (3), the main nozzle (2), and the oil inlet pipe (11), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022863867.3U CN213711200U (en) | 2020-12-03 | 2020-12-03 | Negative pressure type carburetor type gasoline engine oil supply mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022863867.3U CN213711200U (en) | 2020-12-03 | 2020-12-03 | Negative pressure type carburetor type gasoline engine oil supply mechanism |
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| CN213711200U true CN213711200U (en) | 2021-07-16 |
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| CN202022863867.3U Active CN213711200U (en) | 2020-12-03 | 2020-12-03 | Negative pressure type carburetor type gasoline engine oil supply mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404622A (en) * | 2021-08-05 | 2021-09-17 | 福建省福鼎市金星通用机化油器有限公司 | Two-stroke rotary valve type double-pump body fuel oil full-automatic mixing vacuum diaphragm carburetor assembly |
-
2020
- 2020-12-03 CN CN202022863867.3U patent/CN213711200U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404622A (en) * | 2021-08-05 | 2021-09-17 | 福建省福鼎市金星通用机化油器有限公司 | Two-stroke rotary valve type double-pump body fuel oil full-automatic mixing vacuum diaphragm carburetor assembly |
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