A gasket vibration fatigue test device, structure and method

Abstract

The application discloses a cylinder gasket vibration fatigue test device, structure and method, and belongs to the technical field of automobile engines. The test device comprises, from top to bottom, a vibration pressure disc, a cylinder cover simulation block and a cylinder body simulation block, a cylinder gasket vibration fatigue test structure is arranged between the cylinder cover simulation block and the cylinder body simulation block, cooling liquid flow channels are arranged in the cylinder cover simulation block and the cylinder body simulation block, and a temperature rising through hole is arranged in a middle region of the cylinder body simulation block; a cylinder hole is arranged in a middle region of the test structure, a plurality of cylinder gasket through holes are arranged around the cylinder hole, and a plurality of screw holes corresponding to the cylinder gasket through holes are arranged on the cylinder body simulation block; and the test method is realized based on the cylinder gasket vibration fatigue test device. The application is not affected by the space size of the cylinder gasket, can identify the vibration fatigue risk of the cylinder gasket in advance, can reduce development cost, the test method is simple and easy to operate, is convenient for test workers to test, can be widely applied to the domestic automobile market, and can improve the reliability of engine parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile engine technology, in particular to a cylinder gasket vibration fatigue test device, structure and method. BACKGROUND

[0002] At present, the engine displacement requirement in the market is getting smaller and smaller, but the combustion temperature and explosion pressure are constantly increasing. The sealing of the engine cylinder gasket is not only required, but also the risk of cylinder gasket vibration fatigue is paid more and more attention.

[0003] In the prior art, the main engine factory examines the cylinder gasket vibration fatigue by engine bench test or national standard fatigue durability test method to verify the risk, but the former usually has high cost and long cycle, and the latter cylinder gasket vibration fatigue is at room temperature, the simulation effect and the real state difference is too big, cannot identify the risk in advance, and affects the development of cylinder gasket. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art, and provide a cylinder gasket vibration fatigue test device, structure and method, which can not be affected by the space size of the cylinder gasket, can identify the risk of cylinder gasket vibration fatigue in advance, can reduce the development cost, the test method is simple and easy to operate, and the test worker can test conveniently, can be widely applied to the domestic automobile market, and can improve the reliability of engine parts.

[0005] In order to achieve the above purpose, the present application designs a cylinder gasket vibration fatigue test device. It comprises vibration pressure disc, cylinder head simulation block and cylinder body simulation block arranged from top to bottom, the cylinder head simulation block and the cylinder body simulation block are used for placing cylinder gasket vibration fatigue test structure, the cylinder head simulation block and the cylinder body simulation block are provided with cooling liquid flow channel, and the middle region of the cylinder body simulation block is provided with temperature rising through hole.

[0006] Preferably, the cooling liquid flow channel is a square flow channel composed of four horizontal channels perpendicular to each other, and the two ends of the horizontal channel are provided with plugs.

[0007] Preferably, the cooling liquid flow channel is a square flow channel composed of four horizontal channels perpendicular to each other, and the two ends of the horizontal channel are provided with plugs.

[0008] Preferably, the vibration pressure disc comprises a pressure disc body, and a pressure rod is fixed at the top center region of the pressure disc body.

[0009] The application further provides a cylinder gasket vibration fatigue test structure which can be subjected to fatigue test by the cylinder gasket vibration fatigue test device, and a middle part of the cylinder gasket vibration fatigue test structure is provided with a cylinder hole, a periphery of the cylinder hole is provided with a plurality of gasket through holes, the cylinder body simulation block is provided with a plurality of screw holes corresponding to the gasket through holes, and the cylinder gasket vibration fatigue test structure is fixed on the cylinder body simulation block by flat head bolts penetrating through the gasket through holes and the screw holes. The gasket to be tested has various specifications (such as four-cylinder and six-cylinder), and all of them are cut into single-cylinder gaskets for unified test marking.

[0010] The application further provides a cylinder gasket vibration fatigue test method, which is realized based on the cylinder gasket vibration fatigue test device and comprises the following steps.

[0011] Step S1: a cylinder gasket vibration fatigue test structure is made, and the cylinder gasket vibration fatigue test structure is installed between the cylinder head simulation block and the cylinder body simulation block.

[0012] Step S2: the water inlet and the water outlet of the cylinder head simulation block and the cylinder body simulation block are connected with the cooling circulation device respectively, cooling liquid is injected into the cooling liquid flow channel of the cylinder head simulation block and the cylinder body simulation block, the vibration pressure disc top rod is connected with the vibration mechanical control equipment, the heating device is placed in the heating through hole, and whether the whole equipment is intact is detected; if yes, the next step is performed.

[0013] Step S3: the cooling liquid circulation device and the vibration mechanical control equipment are turned on, the cooling liquid is subjected to cold-heat alternating circulation by controlling the heating device, whether there is an abnormal condition of the whole test device is observed, whether the subsequent test is affected according to the abnormal condition is determined, if yes, the test is terminated, and the fault reason is investigated; if no, the subsequent test is continuously performed.

[0014] Step S4: the vibration mechanical control equipment is controlled to exert different variable loads on the vibration pressure disc to perform vibration test at a specified frequency, after the vibration test is completed, the cylinder gasket vibration fatigue test structure is taken off, the sealing property, the compression thickness and the resilience of the cylinder gasket vibration fatigue test structure are detected and evaluated according to the detection standard in the cylinder gasket design manual, and if the cylinder gasket vibration fatigue test structure meets the specified condition, the whole cylinder gasket meets the anti-fatigue test standard.

[0015] Preferably, in the step S1, the cylinder gasket vibration fatigue test structure is made by cutting the gasket to be detected into a single-cylinder hole gasket, and gasket through holes corresponding to the screw holes on the cylinder body simulation block are formed around the cylinder hole.

[0016] Preferably, in the step S2, whether the whole equipment is intact is detected by checking the pipeline and other parts of the test device to ensure that they are in a normal state and have no abnormal conditions such as cracks and falling off.

[0017] Preferably, in the step S3, the temperature of the cooling liquid in the cold-heat alternating cycle is 45℃-110℃.

[0018] Preferably, in the step S3, the abnormal situation includes observing whether the device has oil leakage, water leakage, and gas leakage.

[0019] The beneficial effects of the present application are:

[0020] 1. The present application has simple and reasonable structure, which can identify the risk of cylinder cover fatigue test in advance, reduce the test cost, and has low development cost of the device.

[0021] 2. The test method is easy to operate, and is convenient for subsequent mass production and promotion to other similar structure parts. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of the cylinder cover vibration fatigue test device of the present application;

[0023] Figure 2 is a sectional view of Figure 1 ;

[0024] Figure 3 is a schematic view of the cooling liquid flow channel of the cylinder body simulation block of the present application;

[0025] Figure 4 is a top view of the cylinder cover vibration fatigue test structure of the present application;

[0026] Figure 5 is a flow chart of the cylinder cover vibration fatigue test method of the present application;

[0027] REFERENCE NUMERALS:

[0028] 1 vibration pressure disc, 11 pressure disc body, 12 pressure rod

[0029] 2 cylinder cover simulation block,

[0030] 3 cylinder cover vibration fatigue test structure, 31 cylinder hole, 32 cylinder cover through hole,

[0031] 4 cylinder body simulation block,

[0032] 5 cooling liquid flow channel, 51 horizontal channel, 511 plug, 52 water inlet, 53 water outlet, 54 screw hole. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0034] It is to be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or indirectly on or connected to the other element by way of one or more other elements.

[0035] It is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like as can be used herein, merely describe orientation in relation to the images as shown in the figures and are not intended to denote or imply specific orientation or positioning of the device or element described, and thus can not be construed to limit the application.

[0036] In addition, the terms "first", "second", and the like, do not denote any quantity or order but are used as labels, names for referring to respective distinctive elements. Therefore, in the description of the present application, the terms "first" and "second" can be used to designate corresponding elements regardless of the order or importance thereof by renaming them in different embodi ments, unless explicitly specifically defined otherwise.

[0037] In the description of the present application, the expression "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Therefore, the expressions "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", and the like, which appear in various portions of the specification, are not necessarily referring to the same embodiment, but mean "one or more but not all embodiments" unless otherwise specifically specified. The terms "include", "comprise", "have", and variations thereof, mean "including but not limited to", unless otherwise specifically specified.

[0038] The present application will be further described with reference to the drawings and specific embodiments.

[0039] Embodiment 1

[0040] As Figures 1 to 3The cylinder head gasket vibration fatigue testing device shown includes a vibration pressure plate 1 arranged from top to bottom. The vibration pressure plate 1 includes a pressure plate body 11, and a pressure rod 12 is fixed in the top center area of ​​the pressure plate body 11. A cylinder head simulation block 2 and a cylinder block simulation block 4 are also included. A cylinder head simulation block 2 and a cylinder block simulation block 4 are placed between the cylinder head simulation block 2 and the cylinder block simulation block 4 to house the cylinder head gasket vibration fatigue testing structure 3. Both the cylinder head simulation block 2 and the cylinder block simulation block 4 have coolant flow channels 5. The coolant flow channel 5 is a square flow channel formed by four horizontal channels 51 intersecting perpendicularly. Plugs 511 are provided at both ends of the horizontal channels 51. An inlet 52 is provided in the middle of one side of the coolant flow channel 5, and an outlet 53 is provided in the middle of the opposite side. A heating through-hole 41 is provided in the middle area of ​​the cylinder block simulation block 4.

[0041] Example 2

[0042] like Figure 4 The cylinder head gasket vibration fatigue test structure shown can be used for fatigue testing with the cylinder head gasket vibration fatigue test device as described in Example 1. The cylinder head gasket vibration fatigue test structure 3 has a cylinder bore 31 in the central area, and multiple cylinder head gasket through holes 32 are provided around the cylinder bore. The cylinder block simulation block 4 has multiple screw holes 54 corresponding to the cylinder head gasket through holes 32. There are various sizes of cylinder head gaskets to be tested (such as four-cylinder and six-cylinder). For the sake of uniform experimental labeling, they are all cut into single-cylinder cylinder head gaskets.

[0043] Example 3

[0044] like Figure 5 The cylinder head gasket vibration fatigue test method shown is based on the cylinder head gasket vibration fatigue test apparatus of Example 1, and the test method includes the following steps:

[0045] Step S1: Fabricate cylinder head gasket vibration fatigue test structure 3. Fabricating cylinder head gasket vibration fatigue test structure 3 includes cutting the cylinder head gasket to be tested into a single cylinder hole 31, opening cylinder head gasket through holes 32 around the cylinder hole 31 corresponding to the screw holes 54 on the cylinder block simulation block 4, installing the cylinder head gasket vibration fatigue test structure between the cylinder head simulation block 2 and the cylinder block simulation block 4, and fixing the cylinder head gasket vibration fatigue test structure 3 on the cylinder block simulation block 4 by passing flat-head bolts through the cylinder head gasket through holes 32 and screw holes 54.

[0046] Step S2: Connect the inlet 52 and outlet 53 of the cylinder head simulation block 2 and cylinder block simulation block 4 to the cooling circulation device respectively. Inject coolant into the coolant flow channel 5 of the cylinder head simulation block 2 and cylinder block simulation block 4. Connect the top pressure rod 12 of the vibration pressure plate 1 to the vibration mechanical control device. Place the heating device in the heating through hole 41. Check the condition of the test pipeline and other parts to ensure that they are all in normal condition and there are no abnormalities such as cracks or falling off.

[0047] Step S3, open the cooling liquid circulation device and the vibration machine control device, control the temperature rising device to make the cooling liquid to carry on the cold and hot alternating circulation, in the cold and hot alternating circulation, the temperature of the cooling liquid is 45-110 DEG C. Observe whether the whole experimental device has the symptom of oil leakage, water leakage, air leakage, according to the abnormal situation to determine whether it influences the follow-up test, if it has the influence, the test is terminated, the fault reason is investigated, if it has no influence, the follow-up test is continued;

[0048] Step S4, control the vibration machine control device to exert different variable load on the vibration pressure disc 1 to carry on the vibration experiment of the specified frequency, after finishing, take off the cylinder gasket vibration fatigue test structure 3, according to the detection standard in the cylinder gasket design manual, the sealing property, the compression thickness and the resilience of the cylinder gasket vibration fatigue test structure 3 are detected and evaluated, if it accords with the stipulation, the whole cylinder gasket accords with the anti-fatigue experimental standard.

[0049] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A gasket vibration fatigue test method, which is implemented based on a gasket vibration fatigue test device, the gasket vibration fatigue test device comprising, from top to bottom, a vibration pressure disc (1), a cylinder head simulation block (2), and a cylinder body simulation block (4), a gasket vibration fatigue test structure (3) being placed between the cylinder head simulation block (2) and the cylinder body simulation block (4), a cooling liquid flow channel (5) being arranged in each of the cylinder head simulation block (2) and the cylinder body simulation block (4), and a temperature rising through hole (41) being arranged in a middle region of the cylinder body simulation block (4), characterized in that: The test method comprises the following steps: Step S1, making a cylinder gasket vibration fatigue test structure (3), and installing the cylinder gasket vibration fatigue test structure (3) between a cylinder head simulation block (2) and a cylinder body simulation block (4); Step S2, connecting water inlets (52) and water outlets (53) of the cylinder head simulation block (2) and the cylinder body simulation block (4) to a cooling liquid circulating device respectively, injecting cooling liquid into a cooling liquid flow channel (5) of the cylinder head simulation block (2) and the cylinder body simulation block (4), connecting a vibration pressure plate (1) top pressure rod (12) to a vibration mechanical control device, and placing a temperature rising device in the temperature rising through hole (41), detecting whether the whole device is intact, and if intact, proceeding to the next step; Step S3, opening the cooling liquid circulating device and the vibration mechanical control device, controlling the temperature rising device to make the cooling liquid perform cold and hot alternating circulation, observing whether the whole test device has abnormal conditions, and determining whether the subsequent test is affected according to the abnormal conditions, if affected, terminating the test, investigating the fault cause, and if not affected, continuing the subsequent test; Step S4, controlling the vibration mechanical control device to apply different variable loads on the vibration pressure plate (1) to perform vibration test at a specified frequency, after completion, removing the cylinder gasket vibration fatigue test structure (3), and detecting and evaluating the sealing property, compression thickness and resilience of the cylinder gasket vibration fatigue test structure (3) according to a detection standard, if the cylinder gasket vibration fatigue test structure (3) meets the requirements, the whole cylinder gasket meets the anti-fatigue test standard.

2. The cylinder liner vibration fatigue test method according to claim 1, characterized by: The cooling liquid flow channel (5) is a square flow channel formed by four horizontal channels (51) intersecting with each other perpendicularly, and the two ends of the horizontal channel (51) are provided with plugs (511).

3. The cylinder liner vibration fatigue test method according to claim 1, characterized by: One side of the cooling liquid flow channel (5) is provided with a water inlet (52) in the middle, and the opposite side is provided with a water outlet (53) in the middle.

4. The cylinder liner vibration fatigue test method according to claim 1, characterized by: The vibration pressure plate (1) comprises a pressure plate main body (11), and a pressure rod (12) is fixed to the top center area of the pressure plate main body (11).

5. The cylinder liner vibration fatigue test method according to claim 1, characterized by: In step S1, the cylinder gasket vibration fatigue test structure (3) is made by cutting the cylinder gasket to be detected into a single cylinder hole (31), and a cylinder gasket through hole (32) corresponding to a screw hole (54) on the cylinder body simulation block (4) is formed around the cylinder hole (31).

6. The cylinder liner vibration fatigue test method according to claim 1, characterized by: In step S2, detecting whether the whole device is intact comprises checking the pipeline and other parts of the test device to ensure that they are in normal state without cracks and falling off.

7. The cylinder liner vibration fatigue test method according to claim 1, characterized by: In step S3, the temperature of the cooling liquid in the cold and hot alternating circulation is 45-110°C.

8. The cylinder liner vibration fatigue test method according to claim 1, characterized by: In step S3, the abnormal conditions include observing whether the device has oil leakage, water leakage and gas leakage.

9. A gasket vibration fatigue test structure capable of being subjected to a fatigue test by the gasket vibration fatigue test method as claimed in claim 1, characterized by: The middle area of the cylinder gasket vibration fatigue test structure (3) is provided with a cylinder hole (31), a plurality of cylinder gasket through holes (32) are arranged around the cylinder hole (31), and a plurality of screw holes (54) corresponding to the cylinder gasket through holes (32) are arranged on the cylinder body simulation block (4).

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