CN203248265U - Cylinder head for natural gas engine of forklift - Google Patents
Cylinder head for natural gas engine of forklift Download PDFInfo
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- CN203248265U CN203248265U CN 201320128776 CN201320128776U CN203248265U CN 203248265 U CN203248265 U CN 203248265U CN 201320128776 CN201320128776 CN 201320128776 CN 201320128776 U CN201320128776 U CN 201320128776U CN 203248265 U CN203248265 U CN 203248265U
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- cylinder head
- copper sleeve
- natural gas
- gas engine
- fork truck
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Abstract
The utility model discloses a cylinder head for a natural gas engine of a forklift. The cylinder head for the natural gas engine of the forklift is installed on the natural gas engine, of the 495BPG series, of the forklift, and comprises a rectangular cylinder head body, wherein a cooling water channel is formed in the cylinder cover body, a cylindrical copper sleeve which penetrates through the cooling water channel is arranged on the cylinder cover body, the included angle within the range of 94.5 degrees to 98.5 degrees is formed between the axis of the copper sleeve and the lower plane of the cylinder head body, the outer diameter of the copper sleeve is 24-27mm, the wall thickness of the copper sleeve is 1.5-2mm, a stepped cylinder is arranged at the lower end of the copper sleeve, the outer diameter of the upper layer of the stepped cylinder is 24-27mm, the outer diameter of the lower layer of the stepped cylinder is 16-18mm, the height of the step is 1.5-2.5mm, a through hole is formed in the center of the inner bottom face of the lower portion of the copper sleeve, and the through hole penetrates through the cylinder head body. The cylinder head for the natural gas engine of the forklift meets the requirements of combustion characteristics of natural gas, a sparking plug can be conveniently installed, and the mechanical strength of the cylinder head is ensured.
Description
Technical field
The utility model relates to the cylinder head technical field of forklift engine, is specifically related to a kind of 495BPG series forklift used for natural gas engine cylinder head of gas-firing.
Background technique
Former 495BPG series forklift diesel engine cylinder head designs according to the character of diesel oil, be that the structure of copper sleeve of oil sprayer and position be used for to be installed on the cylinder head is that atomization characteristics and combustion characteristic during according to diesel injection designs, the bottom surface angle that is copper sleeve axis and cylinder head is 100 degree, the purpose that arranges like this is corresponding with the position of the piston upper combustion chamber of former combustion diesel fuel, diesel oil that oil sprayer sprays can fully be spread in that piston combustion is indoor, be beneficial to mix with air, make it reach abundant burning.
The position relationship of original copper sleeve and cylinder head bottom surface designs for combustion diesel fuel, but such design is very not suitable for natural gas fuel, the character according to rock gas is not optimized, be unfavorable for the diffusion of rock gas and ignite, be unfavorable for bringing into play Economy and the power character of natural gas engine.Because oil sprayer is different from the structure of spark plug, the structure that is used for the copper sleeve of installation spark plug and oil sprayer should be not identical.
Therefore, a kind of combustion characteristic that can satisfy rock gas is convenient to install spark plug, guarantees that the fork truck used for natural gas engine cylinder head of cylinder head mechanical strength is demanded urgently occurring.
The model utility content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of combustion characteristic that can satisfy rock gas, is convenient to install spark plug, guarantees the fork truck used for natural gas engine cylinder head of cylinder head mechanical strength.
For achieving the above object, the technical solution of the utility model is as follows: a kind of fork truck used for natural gas engine cylinder head, be installed on the 495BPG series forklift motor of gas-firing, comprise rectangular cylinder head body, offer cooling water channel in described cylinder head body, be provided with the cylindrical, copper sleeve pipe through described cooling water channel, the axis of described copper sleeve becomes the angle of 94.5-98.5 degree with the lower plane of described cylinder head;
The external diameter of described copper sleeve is 24-27mm, and wall thickness is 1.5-2mm;
Be provided with a up big and down small two-layer stepped cylinder in described copper sleeve lower end, the upper strata external diameter of described ladder cylinder is 24-27mm, and lower floor's external diameter is 16-18mm, and ladder height is 1.5-2.5mm;
Inner bottom surface central authorities offer through hole in described copper sleeve bottom, and described through hole runs through described cylinder head body.
Preferably, described through-bore axis and described copper sleeve axis conllinear.
Preferably, described copper sleeve bottom inner bottom surface is a plane, and described ladder cylinder lower surface is a plane, and the distance between two planes is 4mm.
Preferably, described through-hole aperture and spark plug external diameter to be installed are complementary.
Preferably, described copper sleeve and described ladder cylinder are one-body molded.
Preferably, offer annular groove one in the lower floor ladder lower end surface of described ladder cylinder.
Preferably, the cross section of described groove is reversed V-shape.
Pass through technique scheme, the beneficial effect of technical solutions of the utility model is: a kind of fork truck used for natural gas engine cylinder head, be installed on the 495BPG series forklift motor of gas-firing, comprise rectangular cylinder head body, offer cooling water channel in described cylinder head body, be provided with the cylindrical, copper sleeve pipe through described cooling water channel, the axis of described copper sleeve becomes the angle of 94.5-98.5 degree with the lower plane of described cylinder head; The external diameter of described copper sleeve is 24-27mm, and wall thickness is 1.5-2mm; Be provided with a up big and down small two-layer stepped cylinder in described copper sleeve lower end, the upper strata external diameter of described ladder cylinder is 24-27mm, and lower floor's external diameter is 16-18mm, and ladder height is 1.5-2.5mm; Inner bottom surface central authorities offer through hole in described copper sleeve bottom, and described through hole runs through described cylinder head body; Adopt fork truck used for natural gas engine cylinder head provided by the utility model, so that the mixed gas in spark plug and the cylinder fully contacts, satisfied the combustion characteristic of rock gas, simultaneously in the mechanical strength that has guaranteed copper sleeve, return the installation spark plug larger activity space is provided, guaranteed the mechanical strength of cylinder head.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the partial schematic diagram of the disclosed a kind of fork truck used for natural gas engine cylinder head of the utility model embodiment;
Fig. 2 is the supporting schematic representation of the disclosed a kind of fork truck used for natural gas engine cylinder head of the utility model embodiment and piston;
Fig. 3 is the partial schematic diagram of the disclosed a kind of fork truck used for natural gas engine cylinder head of the utility model embodiment.
Numeral and the represented corresponding part title of letter among the figure:
1. cylinder head body 11. copper sleeves 12. spark plugs 13. ladder cylinders
131. groove 14. through holes 15. angles 16. cooling water channels 2. pistons.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of combustion characteristic that can satisfy rock gas, is convenient to install spark plug, guarantees the fork truck used for natural gas engine cylinder head of cylinder head mechanical strength.
Embodiment,
Such as Fig. 1, such as Fig. 2 and as shown in Figure 3, a kind of fork truck used for natural gas engine cylinder head, be installed on the 495BPG series forklift motor of gas-firing, comprise rectangular cylinder head body 1, offer cooling water channel 16 in described cylinder head body 1, be provided with the cylindrical, copper sleeve pipe 11 through described cooling water channel 16, the axis of described copper sleeve 11 becomes the angle 15 of 94.5-98.5 degree with the lower plane of described cylinder head.The external diameter of described copper sleeve 11 is 24-27mm, and wall thickness is 1.5-2mm.When guaranteeing the copper sleeve mechanical strength, also make the tool sleeve that spark plug is installed that the freely activity of larger space is arranged, thereby make the operation that spark plug is installed comparatively convenient.
Be provided with a up big and down small two-layer stepped cylinder 13 in described copper sleeve 11 lower ends, the upper strata external diameter of described ladder cylinder 13 is 24-27mm, and lower floor's external diameter is 16-18mm, and ladder height is 1.5-2.5mm; Described copper sleeve 11 and described ladder cylinder 13 are one-body molded.Described copper sleeve 11 bottom inner bottom surfaces are a plane, and this plane also is the upper surface of described ladder cylinder 13, and described ladder cylinder 13 lower surfaces are a plane, and the distance between two planes is 4mm.
Lower floor ladder lower end surface at described ladder cylinder 13 offers annular groove 131 one, the cross section of described groove 131 is reversed V-shape, offer the seepage that described annular groove 131 can stop the cooling liquid in the cylinder head, thereby improved the sealability of copper sleeve 11 with cylinder head body 1.
Offer through hole 14 in described copper sleeve 11 bottom inner bottom surface central authorities, described through hole 14 runs through described cylinder head body 1, described through hole 14 axis and described copper sleeve 11 axis conllinear, and described through hole 14 apertures and spark plug 12 external diameters to be installed are complementary.Not only increased the sealing of copper sleeve 11 with cylinder head body 1; guaranteed to install spark plug 11 rear copper sleeves 11 enough mechanical strengths have been arranged; and can make spark plug 12 thread bottom end faces equal with the cylinder head bottom; guarantee that the length that spark plug stretches in the cylinder reaches the required requirement of installation spark plug; thereby the mixed gas that is conducive in spark plug and the cylinder contacts fully, guarantees that igniting is reliable; and can prevent that spark plug from being ablated by gas high-temperature, play the effect of protection spark plug.
During use, diesel oil supply system removal with former 495BPG serial diesel engine, natural gas supply system and electronic control system are installed, the piston of straight mouthful of drum-shaped firing chamber of rock gas special use is installed, the utility model cylinder head is installed, after described through hole 14 internal tappings, described spark plug 12 is installed in the described through hole 14.During the work of 495BPG natural gas engine, the mixed gas of air and rock gas enters cylinder through suction tude, and spark plug produces spark mixed gas is lighted, thereby promotes piston 2 motions, make the external output power of motor and moment of torsion, the waste gas of after-flame is discharged through outlet pipe.
Because the cylinder head that the technical program provides has adopted take its lower plane as benchmark, become the angle 15 of 94.5～98.5 degree with columnar copper sleeve 11 axis that run through cooling water channel 16, not only make cylinder head bottom and the through hole 14 of copper sleeve coupling and the distance of inlet valve port and exhaust valve port reach 10 millimeters, thereby cylinder is stamped enough intensity when guaranteeing engine operation, and increased cooling water channel space around the copper sleeve, increase the cooling water capacity that flows through the copper sleeve outside, improved cooling effect.
Carry out above-mentioned improved the utility model 495BPG series forklift used for natural gas engine cylinder head, remedied the deficiency of 495BPG series forklift used for diesel engine cylinder head.Our experiments show that, after the utility model cylinder head is installed, the matched gas special piston, can make the moment of torsion of this natural gas engine reach 181 newton. rice, power reach 43 kilowatts, and the parameter of dispatching from the factory of former 495BPG serial diesel engine is moment of torsion 169 newton. 40 kilowatts of rice, power, moment of torsion and power surpass 6%～8% of former diesel engine.The optimization improvement project of the utility model cylinder head has that the engine remanufacturing cost is low, its usage economy and the good advantage of the feature of environmental protection.
Pass through technique scheme, the beneficial effect of technical solutions of the utility model is: a kind of fork truck used for natural gas engine cylinder head, be installed on the 495BPG series forklift motor of gas-firing, comprise rectangular cylinder head body 1, offer cooling water channel 16 in described cylinder head body 1, be provided with the cylindrical, copper sleeve pipe 11 through described cooling water channel 16, the axis of described copper sleeve 11 becomes the angle 15 of 94.5-98.5 degree with the lower plane of described cylinder head; The external diameter of described copper sleeve 11 is 24-27mm, and wall thickness is 1.5-2mm; Be provided with a up big and down small two-layer stepped cylinder 13 in described copper sleeve 11 lower ends, the upper strata external diameter of described ladder cylinder 13 is 24-27mm, and lower floor's external diameter is 16-18mm, and ladder height is 1.5-2.5mm; Offer through hole 14 in described copper sleeve 11 bottom inner bottom surface central authorities, described through hole 14 runs through described cylinder head body 1; Adopt fork truck used for natural gas engine cylinder head provided by the utility model, so that the mixed gas in spark plug 12 and the cylinder fully contacts, satisfied the combustion characteristic of rock gas, simultaneously in the mechanical strength that has guaranteed copper sleeve 11, return installation spark plug 12 larger activity space is provided, guaranteed the mechanical strength of cylinder head.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. fork truck used for natural gas engine cylinder head, it is characterized in that, be installed on the 495BPG series forklift motor of gas-firing, comprise rectangular cylinder head body, offer cooling water channel in described cylinder head body, be provided with the cylindrical, copper sleeve pipe through described cooling water channel, the axis of described copper sleeve becomes the angle of 94.5-98.5 degree with the lower plane of described cylinder head;
The external diameter of described copper sleeve is 24-27mm, and wall thickness is 1.5-2mm;
Be provided with a up big and down small two-layer stepped cylinder in described copper sleeve lower end, the upper strata external diameter of described ladder cylinder is 24-27mm, and lower floor's external diameter is 16-18mm, and ladder height is 1.5-2.5mm;
Inner bottom surface central authorities offer through hole in described copper sleeve bottom, and described through hole runs through described cylinder head body.
2. fork truck used for natural gas engine cylinder head according to claim 1 is characterized in that, described through-bore axis and described copper sleeve axis conllinear.
3. fork truck used for natural gas engine cylinder head according to claim 2 is characterized in that, described copper sleeve bottom inner bottom surface is a plane, and described ladder cylinder lower surface is a plane, and the distance between two planes is 4mm.
4. fork truck used for natural gas engine cylinder head according to claim 3 is characterized in that, described through-hole aperture and spark plug external diameter to be installed are complementary.
5. fork truck used for natural gas engine cylinder head according to claim 4 is characterized in that, described copper sleeve and described ladder cylinder are one-body molded.
6. fork truck used for natural gas engine cylinder head according to claim 5 is characterized in that, offers annular groove one in the lower floor ladder lower end surface of described ladder cylinder.
7. fork truck used for natural gas engine cylinder head according to claim 6 is characterized in that, the cross section of described groove is reversed V-shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320128776 CN203248265U (en) | 2013-03-20 | 2013-03-20 | Cylinder head for natural gas engine of forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320128776 CN203248265U (en) | 2013-03-20 | 2013-03-20 | Cylinder head for natural gas engine of forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203248265U true CN203248265U (en) | 2013-10-23 |
Family
ID=49374710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320128776 Expired - Fee Related CN203248265U (en) | 2013-03-20 | 2013-03-20 | Cylinder head for natural gas engine of forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203248265U (en) |
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2013
- 2013-03-20 CN CN 201320128776 patent/CN203248265U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20190320 |