CN112729715A - Valve oil seal testing device and testing method thereof - Google Patents
Valve oil seal testing device and testing method thereof Download PDFInfo
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- CN112729715A CN112729715A CN202110062871.6A CN202110062871A CN112729715A CN 112729715 A CN112729715 A CN 112729715A CN 202110062871 A CN202110062871 A CN 202110062871A CN 112729715 A CN112729715 A CN 112729715A
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 239000003921 oil Substances 0.000 claims description 61
- 238000004088 simulation Methods 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000010705 motor oil Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000012795 verification Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Valve Device For Special Equipments (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a valve oil seal testing device and a testing method thereof, and relates to the technical field of engine valve verification.
Description
Technical Field
The invention relates to the technical field of engine valve verification, in particular to a valve oil seal testing device and a testing method thereof.
Background
The valve oil seal is one of key elements of a valve assembly in an engine, the performance of the valve oil seal directly determines the operation time scale of the engine, and the test and verification of the reliability of the valve oil seal are of great significance. The chinese patent publication CN201476948U discloses a technical solution for verifying a valve oil seal by simulating the actual working condition of an engine. However, in the process of practical use, we find that, in the technical solutions, the vacuum tube and the oil cup (corresponding to the combustion chamber of the engine) of the vacuum pump are mainly used for simulating the positive and negative pressure environment of the air outlet assembly under the real working condition. Because the inner diameter of the vacuum tube is small and the connection length from the vacuum pump to each oil cup is different, the vacuum pressure established by each oil cup may have a certain difference under the influence of pressure drop, that is, the positive and negative pressure environments of the valve assembly corresponding to each oil cup may be different, which may affect the test result.
Disclosure of Invention
The invention aims to provide a valve oil seal testing device which is higher in testing accuracy.
The embodiment of the invention is realized by the following steps:
valve oil blanket testing arrangement, including the simulation cylinder cap, the simulation cylinder cap includes the camshaft and constitutes and opens a plurality of valve pipe holes, valve spring and the valve stem of serving in the simulation cylinder cap, its characterized in that still includes:
the collecting pipes correspond to the valve guide pipe holes in number, the two axial ends of each collecting pipe respectively form a guide pipe end and an extending end, the guide pipe ends penetrate into the corresponding valve guide pipe holes, and the extending ends extend out of the simulated cylinder cover from one ends of the valve guide pipe holes back to the camshaft; the collecting pipe is also provided with an inner hole which extends along the axis of the collecting pipe and runs through the collecting pipe, the valve rod penetrates into the inner hole and forms transmission with the camshaft, and a test oil seal which is in sealing fit with the valve rod is arranged at the end of the guide pipe;
the collecting chamber is arranged below the simulation cylinder cover and is in a closed shell shape with an inner cavity, the open end of the simulation cylinder cover is closed by the top surface of the collecting chamber, the extending end of the collecting pipe extends out of the simulation cylinder cover, penetrates through the shell of the collecting chamber and penetrates into the inner cavity of the collecting chamber, the outer wall of the collecting pipe is in airtight fit with the shell of the collecting chamber, a through-flow hole which is arranged between the two ends of the collecting pipe and communicated with the inner cavity of the collecting chamber is formed in the collecting pipe, and the inner cavity of the collecting chamber can be established to be positive pressure or negative pressure;
and the driving device is in transmission connection with a camshaft of the simulation cylinder cover, so that the camshaft is matched with the valve spring to drive the valve rod to reciprocate in the inner hole.
Preferably, the oil collecting device also comprises an oil collecting cup body in the shape of a cup body, the cup mouth end of the oil collecting cup body is connected with the extending end of the collecting pipe, and the inner cavity of the oil collecting cup body is communicated with the inner hole.
Preferably, the oil collecting cup body is transparent, and an observation window is arranged on the collecting chamber.
Preferably, the opening end and the protruding end of the oil collecting cup body are in threaded connection.
Preferably, the collecting pipe comprises a first pipe body and a second pipe body which are sequentially arranged along the axial direction of the collecting pipe, the conduit end is formed on the first pipe body, the extending end is formed on the second pipe body, and the first pipe body and the second pipe body are detachably connected.
Preferably, the first pipe body and the second pipe body are connected by screw threads.
Preferably, the number of the valve guide pipe holes on the simulated cylinder cover is 8.
Preferably, the vacuum pump is used for establishing positive pressure or negative pressure in the inner cavity of the collecting chamber, and the vacuum pump is communicated with the inner cavity of the collecting chamber.
Preferably, the driving device comprises a variable frequency driving motor, and an output shaft of the variable frequency driving motor is in transmission connection with the camshaft.
The invention also provides a test method of the valve oil seal test device, which comprises the following steps:
installing a simulation cylinder cover, a collecting pipe and a collecting chamber;
heating circulating engine oil of a simulated cylinder cover;
different positive and negative pressure environments are established in the inner cavity of the collecting chamber;
and starting the driving device, and determining the oil leakage amount of the inner hole discharged from the extending end under different positive and negative pressure environments so as to judge the oil leakage condition of the test oil seal under different positive and negative pressure environments.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention mainly adopts a simulation cylinder cover to simulate the real working condition of the engine to verify the test oil seal, and simultaneously adopts a collecting chamber with a closed inner cavity to uniformly establish negative pressure, so that the positive and negative pressure environments of each test oil seal are the same, and the test accuracy is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a disassembled schematic view of embodiment 1 of the present invention;
FIG. 3 is a schematic view of a structure simulating a valve guide hole in a cylinder head in embodiment 1 of the present invention;
FIG. 4 is a schematic view of the structure of a collecting tube in example 1 provided by the present invention;
FIG. 5 is a schematic view showing the fitting between the collecting tube and the valve guide hole in example 1 according to the present invention;
fig. 6 is a schematic view of the engagement between the valve guide hole and the valve stem in embodiment 1 of the present invention.
[ Specification of symbols ]
1-simulation cylinder cover, 11-valve guide pipe hole, 12-valve rod, 13-camshaft, 14-test oil seal;
2-a collecting pipe, 21-a first pipe body, 21 a-a guide pipe end, 22-a second pipe body, 22 b-an extending end, 23-a through flow hole and 24-an oil collecting cup body;
3-collection chamber, 31-observation window;
4-driving the motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, embodiment 1 provides a valve oil seal testing apparatus, which includes a simulation cylinder head 1, where the simulation cylinder head 1 includes a camshaft 13, a plurality of valve guide holes 11, a valve spring (not shown), and a valve rod 12, and further includes:
the collecting pipes 2, please refer to fig. 2 to fig. 6, the number of the collecting pipes 2 corresponds to the number of the valve guide pipe holes 11, two axial ends of the collecting pipes 2 respectively form a guide pipe end 21a and an extension end 22b, the guide pipe end 21a penetrates into the corresponding valve guide pipe hole 11, and the extension end 22b extends out of the simulation cylinder head 1 at the end of the valve guide pipe hole 11 opposite to the camshaft 13; the collecting pipe 2 is also provided with an inner hole which extends along the axis and penetrates through, the valve rod 12 penetrates into the inner hole, and a test oil seal 14 which is in sealing fit with the valve rod 12 is arranged on the conduit end 21 a;
referring to fig. 1 and 2, a collecting chamber 3, wherein the collecting chamber 3 is arranged below the simulation cylinder cover 1 and is in a closed shell shape with an inner cavity, after extending out of the simulation cylinder cover 1, an extending end 22b of the collecting pipe 2 penetrates through the shell of the collecting chamber 3 and penetrates into the inner cavity of the collecting chamber 3, the outer wall of the collecting pipe 2 is in airtight fit with the shell of the collecting chamber 3, a through-flow hole 23 which is arranged between two ends of the collecting pipe 2 and communicated with the inner cavity of the collecting chamber 3 is formed in the collecting pipe 2, and the inner cavity of the collecting chamber 3 can be established to be positive pressure or negative pressure;
and the driving device is in transmission connection with a camshaft 13 of the simulation cylinder cover 1, so that the camshaft 13 is matched with the valve spring to drive the valve rod 12 to reciprocate in the inner hole.
In the embodiment, the simulation cylinder head 1 is mainly used for simulating the real operation condition of the engine cylinder head, and is made of the real engine cylinder head, and the conduit end 21a of the collecting pipe 2 is equivalent to a valve conduit in the real engine cylinder head; the rotation of camshaft 13 drives valve stem 12 and moves down in valve guide pipe hole 11, and valve spring cup joints on valve stem 12 and with the spring holder looks butt of valve stem 12, valve spring's the other end and simulation cylinder cap 1 inner wall looks butt to make valve spring exert the reset force that the rebound reset to valve stem 12, and then cooperate camshaft 13 to take and let valve stem 12 reciprocating motion round trip, simulate out the true operating mode of cylinder cap.
In the middle of the operation, drive arrangement opens and drives camshaft 13 and rotate to make valve stem 12 reciprocate back and forth, simultaneously, establish different positive negative pressure environment in the inner chamber of collecting chamber 3, positive negative pressure passes through-flow hole 23 on the collecting pipe 2 and transmits to test oil blanket 14 lip department, and then simulates the operating mode environment that the oil blanket faced under the operating condition.
The specific test method comprises the following steps: installing a simulation cylinder cover 1, a collecting pipe 2 and a collecting chamber 3; heating the circulating engine oil of the simulated cylinder cover 1; different positive and negative pressure environments are established in the inner cavity of the collection chamber 3; and starting the driving device, and measuring the oil leakage amount of the inner hole discharged from the extending end 22b under different positive and negative pressure environments so as to judge the oil leakage condition of the test oil seal 14 under different positive and negative pressure environments.
Compared with the technical scheme of establishing positive and negative pressure by using a vacuum tube in the traditional mode, the positive and negative pressure is established uniformly by adopting the more spacious collecting chambers 3, so that the influence of pressure drop is reduced, and the test precision is improved.
In order to facilitate observing the oil output of the inner hole, in the embodiment, the oil collecting cup body 24 is further included, the cup mouth end of the oil collecting cup body 24 is connected with the extending end 22b of the collecting pipe 2, and the inner cavity of the oil collecting cup body 24 is communicated with the inner hole. Meanwhile, the oil collecting cup body 24 is transparent, and an observation window is arranged on the collection chamber 3. By the structure, a tester can directly know the oil leakage amount of each air valve on the simulation cylinder cover 1 through the observation window and the oil collecting cup body 24, and the test result is more visual.
In this embodiment, to facilitate accurate measurement of the amount collected by cup 24, the open end of cup 24 is threaded onto protruding end 22b to allow an operator to remove cup 24 for measurement.
In addition, as for the above-mentioned collecting pipe 2, the structure of the conduit end 21a thereof corresponds to that of a valve guide in an engine, as described hereinbefore. It is clear that the valve guide structures used by different engines are not identical. A set of collecting pipes with specific pipe ends are arranged for each type of engine, so that the implementation cost is high.
Therefore, in this embodiment, the collection tube 2 includes a first tube 21 and a second tube 22 arranged in this order along the axial direction thereof, the conduit end 21a is formed on the first tube 21, the protruding end 22b is formed on the second tube 22, the first tube 21 and the second tube 22 are detachably connected, and more specifically, the first tube 21 and the second tube 22 are screwed. This double tube structure can save the number of the second tubes 22.
In addition, in the present embodiment, the number of the valve guide holes 11 in the dummy head 1 is 8 to increase the simultaneous test amount of the device.
With regard to the establishment of positive or negative pressure in the inner cavity of the collection chamber 3, in this embodiment, a vacuum pump is further included for establishing positive or negative pressure in the inner cavity of the collection chamber 3, said vacuum pump being in communication with the inner cavity of said collection chamber 3.
In addition, in the embodiment, the driving device comprises a variable frequency driving motor 4, and an output shaft of the variable frequency driving motor 4 is in transmission connection with the camshaft 13. The variable frequency driving motor 4 is adopted to drive the camshaft 13, and the actual working conditions of the engine under different running speeds can be simulated.
Among them, it is noteworthy that: the test oil seal 14, the valve rod 12, the valve spring and the camshaft 13 belong to the existing engine structure, and the description of the test oil seal, the valve rod 12, the valve spring and the camshaft is not repeated in the embodiment; meanwhile, for those skilled in the art, it is capable of selecting a specific transmission structure (such as that disclosed in chinese patent publication No. CN 201476948U) for realizing the rotation of the camshaft 13 driven by the output shaft of the driving motor 4 from the prior art, so that the present embodiment does not describe the specific form of the transmission structure.
More specifically, in the present embodiment, the collecting chamber 3 is in a square box shape, and the connection relationship between the top plate constituting the top wall of the collecting chamber and the side plates constituting the side portions of the collecting chamber is set to be detachable, so that the structural style enables an operator to test different engines when necessary, and the top plate can be detached together with the engines, and the disassembly and the assembly are more convenient.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Valve oil blanket testing arrangement, including the simulation cylinder cap, the simulation cylinder cap includes the camshaft and constitutes and opens a plurality of valve pipe holes, valve spring and the valve stem of serving in the simulation cylinder cap, its characterized in that still includes:
the collecting pipes correspond to the valve guide pipe holes in number, the two axial ends of each collecting pipe respectively form a guide pipe end and an extending end, the guide pipe ends penetrate into the corresponding valve guide pipe holes, and the extending ends extend out of the simulated cylinder cover from one ends of the valve guide pipe holes back to the camshaft; the collecting pipe is also provided with an inner hole which extends along the axis of the collecting pipe and runs through the collecting pipe, the valve rod penetrates into the inner hole and forms transmission with the camshaft, and a test oil seal which is in sealing fit with the valve rod is arranged at the end of the guide pipe;
the collecting chamber is arranged below the simulation cylinder cover and is in a closed shell shape with an inner cavity, the open end of the simulation cylinder cover is closed by the top surface of the collecting chamber, the extending end of the collecting pipe extends out of the simulation cylinder cover, penetrates through the shell of the collecting chamber and penetrates into the inner cavity of the collecting chamber, the outer wall of the collecting pipe is in airtight fit with the shell of the collecting chamber, a through-flow hole which is arranged between the two ends of the collecting pipe and communicated with the inner cavity of the collecting chamber is formed in the collecting pipe, and the inner cavity of the collecting chamber can be established to be positive pressure or negative pressure;
and the driving device is in transmission connection with a camshaft of the simulation cylinder cover, so that the camshaft is matched with the valve spring to drive the valve rod to reciprocate in the inner hole.
2. A valve oil seal test device as claimed in claim 1, further comprising an oil collecting cup body in the shape of a cup, wherein a cup mouth end of the oil collecting cup body is connected with an extending end of the collecting pipe, and an inner cavity of the oil collecting cup body is communicated with the inner hole.
3. A valve oil seal test device as claimed in claim 2, wherein said oil-collecting cup body is transparent, and said collection chamber is provided with an observation window.
4. A valve oil seal test device as claimed in claim 2, wherein the oil collecting cup body is in threaded connection between the open end and the protruding end.
5. A valve oil seal test device as claimed in claim 1, wherein said collecting pipe comprises a first pipe body and a second pipe body arranged in sequence along the axial direction thereof, said guide end is formed on the first pipe body, said extension end is formed on the second pipe body, and said first pipe body and said second pipe body are detachably connected.
6. A valve oil seal test device as claimed in claim 5, wherein said first and second tubes are threadedly connected.
7. A valve oil seal test device as claimed in claim 1, wherein the number of valve guide holes in said dummy head is 8.
8. A valve oil seal test apparatus as defined in claim 1, further comprising a vacuum pump for establishing a positive or negative pressure in an inner chamber of said collection chamber, said vacuum pump being in communication with said inner chamber of said collection chamber.
9. A valve oil seal test device as claimed in claim 1, wherein said drive device comprises a variable frequency drive motor, and an output shaft of said variable frequency drive motor is in transmission connection with a camshaft.
10. A method of testing a valve oil seal testing apparatus according to claim 1, comprising the steps of:
installing a simulation cylinder cover, a collecting pipe and a collecting chamber;
heating circulating engine oil of a simulated cylinder cover;
different positive and negative pressure environments are established in the inner cavity of the collecting chamber;
and starting the driving device, and determining the oil leakage amount of the inner hole discharged from the extending end under different positive and negative pressure environments so as to judge the oil leakage condition of the test oil seal under different positive and negative pressure environments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110062871.6A CN112729715B (en) | 2021-01-18 | 2021-01-18 | Valve oil seal test device and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110062871.6A CN112729715B (en) | 2021-01-18 | 2021-01-18 | Valve oil seal test device and test method thereof |
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| Publication Number | Publication Date |
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| CN112729715A true CN112729715A (en) | 2021-04-30 |
| CN112729715B CN112729715B (en) | 2024-07-02 |
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| CN202110062871.6A Active CN112729715B (en) | 2021-01-18 | 2021-01-18 | Valve oil seal test device and test method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08304235A (en) * | 1995-05-01 | 1996-11-22 | Arai Pump Mfg Co Ltd | Testing device for valve stem seal |
| CN101581628A (en) * | 2009-07-03 | 2009-11-18 | 成都盛帮密封件有限公司 | Engine valve oil seal test stand |
| CN102192821A (en) * | 2011-03-04 | 2011-09-21 | 青岛开世密封工业有限公司 | Oil leakage characteristic test machine for valve guide rod oil seal and test method thereof |
| KR101635370B1 (en) * | 2016-02-16 | 2016-07-01 | 부림자동화(주) | Hydraulic cylinder inside oil leakage measuring equipment and the measuring methods |
| CN213985577U (en) * | 2021-01-18 | 2021-08-17 | 成都盛帮密封件股份有限公司 | Valve oil seal testing device |
-
2021
- 2021-01-18 CN CN202110062871.6A patent/CN112729715B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08304235A (en) * | 1995-05-01 | 1996-11-22 | Arai Pump Mfg Co Ltd | Testing device for valve stem seal |
| CN101581628A (en) * | 2009-07-03 | 2009-11-18 | 成都盛帮密封件有限公司 | Engine valve oil seal test stand |
| CN102192821A (en) * | 2011-03-04 | 2011-09-21 | 青岛开世密封工业有限公司 | Oil leakage characteristic test machine for valve guide rod oil seal and test method thereof |
| KR101635370B1 (en) * | 2016-02-16 | 2016-07-01 | 부림자동화(주) | Hydraulic cylinder inside oil leakage measuring equipment and the measuring methods |
| CN213985577U (en) * | 2021-01-18 | 2021-08-17 | 成都盛帮密封件股份有限公司 | Valve oil seal testing device |
Non-Patent Citations (1)
| Title |
|---|
| 张海峰;李伟军;: "基于模拟试验方法预测气门导管耐磨性的研究", 内燃机与配件, no. 07, 10 July 2012 (2012-07-10) * |
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| CN112729715B (en) | 2024-07-02 |
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