CN204436503U - Valve guide bushing used for natural gas engine - Google Patents
Valve guide bushing used for natural gas engine Download PDFInfo
- Publication number
- CN204436503U CN204436503U CN201520052700.5U CN201520052700U CN204436503U CN 204436503 U CN204436503 U CN 204436503U CN 201520052700 U CN201520052700 U CN 201520052700U CN 204436503 U CN204436503 U CN 204436503U
- Authority
- CN
- China
- Prior art keywords
- catheter body
- guide bushing
- valve guide
- natural gas
- gas engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000003345 natural gas Substances 0.000 title claims abstract description 23
- 230000003746 surface roughness Effects 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
- 238000007790 scraping Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Media Introduction/Drainage Providing Device (AREA)
Abstract
The utility model discloses a kind of valve guide bushing used for natural gas engine, comprise cylindric catheter body, catheter body has through hole through vertically, through-hole wall face surface roughness is at Ra0.8-Ra1.6, the lower end mouth place of catheter body is provided with from the internal face of the catheter body radially annular recess that extends of wall, the bottom land of annular recess is crossing with catheter body internal face is right angle, the outer wall of catheter body upper end and the direct elastic conjunction of valve stem seal sleeve, the length of catheter body is at 75mm-82mm.Valve guide bushing used for natural gas engine of the present utility model, by improvement that is outside to valve guide bushing and internal structure, the performances such as guidance quality and removal carbon distribution are improved, the natural gas engine work applying valve guide bushing of the present utility model is run more steady, extend the life-span of motor.
Description
Technical field
The utility model relates to technical field of engines, particularly one valve guide bushing used for natural gas engine.
Background technique
Motor is the power source of various vehicle and multiple machinery.The gas distribution system of motor is for ensureing that motor opens valve and cut out valve at correct time point, the system of discharging with the supply and waste gas that realize motor fresh air.Valve guide bushing is the important composition part of engine air distribution system, is the guiding device of engine valve, play the guiding role to reciprocating valve, and makes the heat on valve stem pass to cylinder head through valve guide bushing; For valve top-mounted air distribution mechanism, valve guide bushing is by realizing the fixed installation with cylinder head with the valve guide bushing mounting hole interference fit in cylinder head.
A kind of valve guide bushing of prior art, its structure as shown in Figure 1, valve guide bushing 1 comprises catheter body, catheter body has the through hole 11 through vertically for coordinating with valve stem, stepped outer groove 12 is provided with in the periphery, upper end portion of catheter body, for installing valve stem seal sleeve, the length of valve guide bushing is usually at 70mm.The valve guide bushing Problems existing of this structure is: the place that inlet and exhaust valve contacts with valve guide bushing easily forms carbon distribution, not easily removes; Stepped outer groove structure is sharper, easily causes scraping infringement to the valve stem seal sleeve of quality of rubber materials; The curtailment of valve guide bushing, poor to the guidance quality of valve stem, easily there is eccentric wear phenomenon in motor operationally inlet and exhaust valve.These defects of the valve guide bushing existence of prior art, reduce the reliability that it uses, cause direct impact to the performance of motor.
Summary of the invention
In view of this, technical problem to be solved in the utility model is: the valve guide bushing used for natural gas engine providing a kind of improvement, and this valve guide bushing has valve stem good scrapes carbon remover performance, and reliability is high, is conducive to the normal operation of motor.
For solving the problems of the technologies described above, the technical solution of the utility model is: valve guide bushing used for natural gas engine, comprise cylindric catheter body, described catheter body has the through hole through vertically for coordinating with valve stem, be provided with at the lower end mouth place of described catheter body from the internal face of the described catheter body radially annular recess that extends of wall, the bottom land of described annular recess is crossing with described catheter body internal face is right angle; The outer wall of described catheter body upper end is used for elastic conjunction direct with valve stem seal sleeve.
Preferably, the length of described catheter body is at 75mm-82mm.
Preferably, the internal face surface roughness of described catheter body is at Ra0.8-Ra1.6.
Preferably, the outer wall surface roughness of described catheter body upper end is at Ra1.6-Ra3.2.
Preferably, chamfer surface is respectively equipped with between the lower end surface of described catheter body and the outer wall of upper-end surface and described catheter body.
Owing to have employed technique scheme, valve guide bushing used for natural gas engine of the present utility model, be provided with from the internal face of the catheter body radially annular recess that extends of wall at the lower end mouth place of catheter body, the bottom land of this annular recess is crossing with catheter body internal face is right angle, and this right angle structure is sharp; Have employed the natural gas engine of the valve guide bushing of this structure in running, the valve stem of inlet and exhaust valve coordinates in the process of sliding up and down with the through hole of the through vertically of catheter body, due to the existence of right-angle structure, the effect of striking off is played to the valve stem of inlet and exhaust valve and valve guide bushing contacting point, not easily form carbon distribution, valve stem can be slided up and down swimmingly, be conducive to the normal operation of motor; The upper end portion of catheter body is consistent with catheter body structure, its periphery eliminates the stepped outer groove of prior art, the direct elastic conjunction of outer wall of valve stem seal sleeve and catheter body upper end, the stepped outer groove solved on the valve guide bushing of prior art causes the problem of scraping infringement to valve stem seal sleeve.
Because the length of catheter body lengthens to some extent compared to existing catheter body, the steering capability of valve stem is strengthened, decreased motor operationally to the eccentric wear of inlet and exhaust valve.
Because the surface roughness of catheter body internal face is at Ra0.8-Ra1.6, catheter body internal face unusual light, little with the friction factor of valve stem, be conducive to valve stem and slide up and down swimmingly along the through hole that the axis of valve guide bushing is through; The outer wall surface roughness of preferred catheter body upper end, at Ra1.6-Ra3.2, is convenient to realize the interference fit with valve stem seal sleeve.
Because the upper and lower end face place of catheter body is respectively equipped with chamfer surface, be convenient to assemble with engine cylinder cap and valve stem seal sleeve.
In sum, valve guide bushing used for natural gas engine of the present utility model, by improvement that is outside to valve guide bushing and internal structure, combination property is improved, and then it is more steady to make the natural gas engine work applying valve guide bushing of the present utility model run, and extends the life-span of motor.
Accompanying drawing explanation
Fig. 1 is the valve guide bushing structure cross-sectional schematic of prior art;
Fig. 2 is the valve guide bushing structure cross-sectional schematic used for natural gas engine of the utility model embodiment;
Fig. 3 is the assembling schematic diagram of valve guide bushing used for natural gas engine in Fig. 2 and cylinder head;
In figure: 1-valve guide bushing; 11-through hole; The stepped outer groove of 12-; 2-valve guide bushing; 21-through hole; 22-internal face; 221-annular recess; 2211-bottom land; 23-outer wall; The upper chamfer surface of 231-; Chamfer surface under 232-; 3-cylinder head.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 2, the valve guide bushing used for natural gas engine 2 of the utility model embodiment, comprise cylindric catheter body, this catheter body has the through hole 21 through vertically for coordinating with valve stem, be provided with from the internal face 22 of the catheter body radially annular recess 221 that extends of wall 23 at the lower end mouth place of catheter body, the bottom land 2211 of this annular recess 221 is crossing with catheter body internal face 22 is right angle, and this right angle structure is sharp; Have employed the natural gas engine of the valve guide bushing of this structure in running, the valve stem of inlet and exhaust valve coordinates in the process of sliding up and down with the through hole 21 of catheter body, due to the existence of right-angle structure, the effect of striking off is played to the valve stem of inlet and exhaust valve and valve guide bushing contacting point, not easily form carbon distribution, valve stem can be slided up and down swimmingly, be conducive to the normal operation of motor.The upper end portion of catheter body is consistent with catheter body structure, its periphery eliminates the stepped outer groove of prior art, outer wall 23 surface roughness of catheter body upper end is at Ra1.6-Ra3.2, elastic conjunction direct with valve stem seal sleeve, the problem that the valve guide bushing that there is not prior art causes scraping to damage because being provided with stepped outer groove to valve stem seal sleeve.
Wherein, the Design of length of catheter body is in 75mm-82mm scope, and the present embodiment is preferably 78mm.Because the length of catheter body lengthens to some extent compared to existing catheter body, thus the steering capability of valve stem is strengthened, decreased motor operationally to the eccentric wear that inlet and exhaust valve causes.
Wherein, catheter body internal face 22 process after surface roughness at Ra0.8-Ra1.6.This numerical value makes catheter body internal face 22 unusual light, little with the friction factor of valve stem, is conducive to valve stem and slides up and down swimmingly along the through hole 21 of valve guide bushing.
Wherein, between the lower end surface of catheter body and the outer wall 23 of catheter body, be processed with lower chamfer surface 232, be convenient to assemble with the engine cylinder cap 3 shown in Fig. 3; Between the upper-end surface of catheter body and the outer wall 23 of catheter body, be processed with chamfer surface 231, be convenient to assemble with valve stem seal sleeve.
Valve guide bushing used for natural gas engine of the present utility model, by improvement that is outside to valve guide bushing and internal structure, the performances such as guidance quality and removal carbon distribution are improved, and then it is more steady to make the natural gas engine work applying valve guide bushing of the present utility model run, and extends the life-span of motor.
Claims (5)
1. valve guide bushing used for natural gas engine, comprise cylindric catheter body, described catheter body has the through hole through vertically for coordinating with valve stem, it is characterized in that, be provided with at the lower end mouth place of described catheter body from the internal face of the described catheter body radially annular recess that extends of wall, the bottom land of described annular recess is crossing with described catheter body internal face is right angle; The outer wall of described catheter body upper end is used for elastic conjunction direct with valve stem seal sleeve.
2. valve guide bushing used for natural gas engine as claimed in claim 1, is characterized in that, the length of described catheter body is at 75mm-82mm.
3. valve guide bushing used for natural gas engine as claimed in claim 1 or 2, is characterized in that, the internal face surface roughness of described catheter body is at Ra0.8-Ra1.6.
4. valve guide bushing used for natural gas engine as claimed in claim 3, is characterized in that, the outer wall surface roughness of described catheter body upper end is at Ra1.6-Ra3.2.
5. valve guide bushing used for natural gas engine as claimed in claim 1, is characterized in that, is respectively equipped with chamfer surface between the outer wall of the lower end surface of described catheter body and upper-end surface and described catheter body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520052700.5U CN204436503U (en) | 2015-01-26 | 2015-01-26 | Valve guide bushing used for natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520052700.5U CN204436503U (en) | 2015-01-26 | 2015-01-26 | Valve guide bushing used for natural gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204436503U true CN204436503U (en) | 2015-07-01 |
Family
ID=53604381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520052700.5U Expired - Fee Related CN204436503U (en) | 2015-01-26 | 2015-01-26 | Valve guide bushing used for natural gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204436503U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412571A (en) * | 2018-03-05 | 2018-08-17 | 中国北方发动机研究所(天津) | A kind of new-type valve guide bushing structure |
-
2015
- 2015-01-26 CN CN201520052700.5U patent/CN204436503U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412571A (en) * | 2018-03-05 | 2018-08-17 | 中国北方发动机研究所(天津) | A kind of new-type valve guide bushing structure |
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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: 20150701 |