CN204357511U - A kind of low friction, high hardness, long-life tappet - Google Patents
A kind of low friction, high hardness, long-life tappet Download PDFInfo
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- CN204357511U CN204357511U CN201420812387.6U CN201420812387U CN204357511U CN 204357511 U CN204357511 U CN 204357511U CN 201420812387 U CN201420812387 U CN 201420812387U CN 204357511 U CN204357511 U CN 204357511U
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Abstract
The utility model provides a kind of low friction, high hardness, long-life tappet, comprise tappet matrix (1), the tappet working surface (2) of tappet matrix (1) adheres to coating layer, described coating layer comprises coating layer top layer (3) and coating layer bottom (4), and described coating layer top layer (3) is ta-C layer, described coating layer bottom (4) is Cr+W-C:H layer or Cr+CrN layer.The utility model can make tappet face surface roughness at below Ra0.1, surface microhardness is increased to more than 4000HV, friction factor is reduced to less than 0.09, thus ensure that tappet possesses the performances such as low frictional loss, high wear resistance and high hardness well, make tappet can bear higher load and harsher working environment, decrease frictional loss and the CO2 emissions of motor, be conducive to the raising of engine performance.
Description
Technical field
The utility model relates to internal-combustion engine tappet technical field, especially relates to a kind of low friction, high hardness, long-life tappet.
Background technique
Along with the develop rapidly of automotive industry; in the face of universal, the raising of environmental protection requirement and the trend of petroleum resources short supply of automobile; people propose more and more higher requirement to the power character of motor car engine, Economy and the feature of environmental protection, and new-energy automobile replaces traditional combustion engine automobile to become main flow also needing the longer time.For internal-combustion engine, reduce the Main way that energy consumption, emissions reduction and raising its usage economy are current technical researches.Tappet, as one of the key components and parts of internal-combustion engine, is widely used in valve mechanism and high-pressure common-rail oil pump driving mechanism, reduces the frictional work in its operating movement process and improves its working life, can significantly improve Economy and the feature of environmental protection of internal-combustion engine.
At present, the conventional material of domestic production tappet has single material and composite two kinds.Single material is generally chilled cast iron, can harden cast iron, alloyed steel, improves material capability by adding alloy or heat-treating.The tappet of this single material can not meet the performance requirement of high wear resistance, low coefficient of friction.Composite tappet is then the operating mode according to tappet, end face, the cylinder of tappet adopt unlike material, and such as, tappet end face selects the good alloyed steel of wear resistance, cemented carbide etc., tappet cylinder adopts steel for carburizing, and connection between the two adopts welding or the Placement such as nested.This composite tappet exists that compound interface intensity is not high, friction factor is high and the drawback such as processed complex.
Model utility content
The technical problems to be solved in the utility model is: for prior art Problems existing, provides a kind of and has anti-low friction with metallic material adhesive property, high hardness, long-life tappet strongly.
The technical problems to be solved in the utility model realizes by the following technical solutions: a kind of low friction, high hardness, long-life tappet, comprise tappet matrix, the tappet working surface of described tappet matrix adheres to coating layer, described coating layer comprises coating layer top layer and coating layer bottom, and described coating layer top layer is ta-C layer, described coating layer bottom is Cr+W-C:H layer or Cr+CrN layer.
Preferably, the total thickness of described coating layer is 0.0005-0.003mm.
Preferably, the thickness >=0.0004mm on described coating layer top layer.
Preferably, the thickness >=0.0001mm of described coating layer bottom.
Preferably, the surface roughness≤Ra0.1 of described coating layer, friction factor≤0.09.
Preferably, described tappet is the cup-shaped hydraulic tappet of motor.
Preferably, described tappet is motor cylindricality machinery tappet.
Preferably, described tappet is motor cylindricality hydraulic tappet.
Preferably, described tappet is motor bacterium shape machinery tappet.
Preferably, described tappet is motor bacterium shape hydraulic tappet.
Compared with prior art, the beneficial effects of the utility model are: be ta-C layer by the tappet working surface on the tappet matrix of tappet adhering to top layer, bottom is the film-form coating layer of Cr+W-C:H layer or Cr+CrN layer, tappet face surface roughness can be made at below Ra0.1, surface microhardness is increased to more than 4000HV, friction factor is reduced to less than 0.09, therefore, can ensure that tappet possesses low frictional loss well, the performance such as high wear resistance and high hardness, make tappet can bear higher load and harsher working environment, decrease frictional loss and the CO2 emissions of motor.
Accompanying drawing explanation
Fig. 1 is the coating layer tectonic maps of a kind of low friction of the utility model, high hardness, long-life tappet.
Fig. 2 is the tectonic maps of the cup-shaped hydraulic tappet of motor.
Fig. 3 is the tectonic maps of motor cylindricality machinery tappet.
Fig. 4 is the tectonic maps of motor cylindricality hydraulic tappet.
Fig. 5 is the tectonic maps of motor bacterium shape machinery tappet.
Fig. 6 is the tectonic maps of motor bacterium shape hydraulic tappet.
Figure middle part product token name claims: 1-tappet matrix, 2-tappet working surface, 3-coating layer top layer, 4-coating layer bottom.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the utility model is described in detail.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.
Embodiment 1
The cup-shaped hydraulic tappet of motor as shown in Figure 2, comprises tappet matrix 1, the surface hardness >=550HV of described tappet matrix 1, its surface roughness≤Ra0.1.As shown in Figure 1, the tappet working surface 2 of described tappet matrix 1 forms film-form coating layer by physical gas phase deposition technology and plasma enhanced chemical gas phase deposition technology, described coating layer comprises coating layer top layer 3 and coating layer bottom 4, described coating layer top layer 3 is ta-C layers, its thickness >=0.0004mm; Described coating layer bottom 4 is Cr+W-C:H layer or Cr+CrN layer, its thickness >=0.0001mm.After carrying out corresponding performance parameter test to above-mentioned tappet, the performance index of its coating layer are as follows: coating layer combination force HF1-HF3, surface microhardness 4000HV-8000HV, and surface roughness≤Ra0.1, friction factor≤0.09 (dry type).In order to improve the operating life of tappet further, the total thickness of described coating layer is 0.0005-0.003mm, thus the profile of tappet can be remained unchanged substantially, is conducive to the assembling of tappet.
Embodiment 2
Motor cylindricality machinery tappet as shown in Figure 3, comprise tappet matrix 1, the tappet working surface 2 of described tappet matrix 1 forms film-form coating layer by physical gas phase deposition technology and plasma enhanced chemical gas phase deposition technology, described coating layer comprises coating layer top layer 3 and coating layer bottom 4, described coating layer top layer 3 is ta-C layers, and described coating layer bottom 4 is Cr+W-C:H layer or Cr+CrN layer.Other are with embodiment 1.
Embodiment 3
Motor cylindricality hydraulic tappet as shown in Figure 4, comprise tappet matrix 1, the tappet working surface 2 of described tappet matrix 1 forms film-form coating layer by physical gas phase deposition technology and plasma enhanced chemical gas phase deposition technology, described coating layer comprises coating layer top layer 3 and coating layer bottom 4, described coating layer top layer 3 is ta-C layers, and described coating layer bottom 4 is Cr+W-C:H layer or Cr+CrN layer.Other are with embodiment 1.
Embodiment 4
Motor bacterium shape machinery tappet as shown in Figure 5, comprise tappet matrix 1, the tappet working surface 2 of described tappet matrix 1 forms film-form coating layer by physical gas phase deposition technology and plasma enhanced chemical gas phase deposition technology, described coating layer comprises coating layer top layer 3 and coating layer bottom 4, described coating layer top layer 3 is ta-C layers, and described coating layer bottom 4 is Cr+W-C:H layer or Cr+CrN layer.Other are with embodiment 1.
Embodiment 5
Motor bacterium shape hydraulic tappet as shown in Figure 6, comprise tappet matrix 1, the tappet working surface 2 of described tappet matrix 1 forms film-form coating layer by physical gas phase deposition technology and plasma enhanced chemical gas phase deposition technology, described coating layer comprises coating layer top layer 3 and coating layer bottom 4, described coating layer top layer 3 is ta-C layers, and described coating layer bottom 4 is Cr+W-C:H layer or Cr+CrN layer.Other are with embodiment 1.
Ta-C layers owing to the tappet working surface 2 on the tappet matrix 1 of tappet attached to top layer 3, bottom 4 is film-form coating layers of Cr+W-C:H layer or Cr+CrN layer, the surface microhardness of tappet working surface 2 can be made to be significantly improved to more than 4000HV, friction factor is obviously reduced to less than 0.09, simultaneously, its surface roughness is at below Ra0.1, thus ensure that tappet possesses low frictional loss well, the performance such as high wear resistance and high hardness, there is the anti-performance bondd with metallic material strongly, therefore, higher load and harsher working environment can be born, decrease frictional loss and the CO2 emissions of motor, the combination property of motor is significantly improved.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, it should be noted that, coating layer in the utility model not only can be attached on the working surface (with cam contact surface) bottom tappet, also can be attached on tappet cylindrical or other working surfaces.Therefore, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a low friction, high hardness, long-life tappet, comprise tappet matrix (1), it is characterized in that: the tappet working surface (2) of described tappet matrix (1) adheres to coating layer, described coating layer comprises coating layer top layer (3) and coating layer bottom (4), and described coating layer top layer (3) is ta-C layer, described coating layer bottom (4) is Cr+W-C:H layer or Cr+CrN layer.
2. the low friction of one according to claim 1, high hardness, long-life tappet, is characterized in that: the total thickness of described coating layer is 0.0005-0.003mm.
3. the low friction of the one according to claims 1 or 2, high hardness, long-life tappet, is characterized in that: the thickness >=0.0004mm of described coating layer top layer (3).
4. the low friction of the one according to claims 1 or 2, high hardness, long-life tappet, is characterized in that: the thickness >=0.0001mm of described coating layer bottom (4).
5. the low friction of the one according to claims 1 or 2, high hardness, long-life tappet, is characterized in that: the surface roughness≤Ra0.1 of described coating layer, friction factor≤0.09.
6. the low friction of one according to claim 5, high hardness, long-life tappet, is characterized in that: described tappet is the cup-shaped hydraulic tappet of motor.
7. the low friction of one according to claim 5, high hardness, long-life tappet, is characterized in that: described tappet is motor cylindricality machinery tappet.
8. the low friction of one according to claim 5, high hardness, long-life tappet, is characterized in that: described tappet is motor cylindricality hydraulic tappet.
9. the low friction of one according to claim 5, high hardness, long-life tappet, is characterized in that: described tappet is motor bacterium shape machinery tappet.
10. the low friction of one according to claim 5, high hardness, long-life tappet, is characterized in that: described tappet is motor bacterium shape hydraulic tappet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420812387.6U CN204357511U (en) | 2014-12-19 | 2014-12-19 | A kind of low friction, high hardness, long-life tappet |
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| CN201420812387.6U CN204357511U (en) | 2014-12-19 | 2014-12-19 | A kind of low friction, high hardness, long-life tappet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957393A (en) * | 2021-09-28 | 2022-01-21 | 西安交通大学 | Method for improving surface wear performance and service life of nitride coating cutter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957393A (en) * | 2021-09-28 | 2022-01-21 | 西安交通大学 | Method for improving surface wear performance and service life of nitride coating cutter |
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