Cylinder gasket vibration fatigue test device, structure and method

Abstract

The invention discloses a cylinder gasket vibration fatigue test device, structure and method, and belongs to the technical field of automobile engines. The test device comprises a vibration pressure disc, a cylinder cover simulation block and a cylinder body simulation block which are sequentially arranged from top to bottom, a cylinder head gasket vibration fatigue test structure is placed 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 heating through hole is formed in the middle area of the cylinder body simulation block; an air cylinder hole is formed in the middle area of the test structure, a plurality of cylinder gasket through holes are formed in the periphery of the air cylinder hole, and a plurality of screw holes corresponding to the cylinder gasket through holes are formed in a cylinder body simulation block; the test method is realized based on the cylinder gasket vibration fatigue test device. The method is not affected by the space size of the cylinder gasket, the vibration fatigue risk of the cylinder gasket can be recognized in advance, the development cost can be reduced, the test method is simple and easy to operate, a tester can conveniently conduct testing, the method can be widely applied to the domestic automobile market, and the reliability of engine parts is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile engines, and in particular to a cylinder gasket vibration fatigue test device, structure and method. Background Art

[0002] At present, the engine displacement requirements in the market are getting smaller and smaller, but the combustion temperature and explosion pressure are constantly increasing. Not only are there requirements for the engine cylinder gasket sealing, but there is also increasing concern about the risk of cylinder gasket vibration fatigue.

[0003] In the existing technology, OEMs evaluate cylinder gasket vibration fatigue by performing engine bench tests or using fatigue endurance test methods in national standards to verify risks. However, the former is usually expensive and time-consuming, while the latter cylinder gasket vibration fatigue is tested at room temperature. The difference between the simulation effect and the actual state is too large, and risks cannot be identified in advance, which affects cylinder gasket development. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a cylinder gasket vibration fatigue test device, structure and method to meet the requirements of not being affected by the spatial dimensions of the cylinder gasket, being able to identify the risk of cylinder gasket vibration fatigue in advance and reducing development costs. The test method is simple and easy to operate, which is convenient for testers to conduct tests. It can be widely used in the domestic automobile market to improve the reliability of engine components.

[0005] To achieve the above purpose, the present invention designs a cylinder gasket vibration fatigue test device, which includes a vibration pressure plate, a cylinder head simulation block, and a cylinder body simulation block arranged in sequence from top to bottom, a cylinder gasket vibration fatigue test structure is placed between the cylinder head simulation block and the cylinder body simulation block, coolant flow channels are provided in the cylinder head simulation block and the cylinder body simulation block, and a temperature rise through hole is provided in the middle area of ​​the cylinder body simulation block.

[0006] Preferably, the coolant flow channel is a square flow channel formed by four horizontal channels intersecting each other perpendicularly, and plugs are provided at both ends of the horizontal channels.

[0007] Preferably, a water inlet is provided in the middle of one side of the coolant flow channel, and a water outlet is provided in the middle of the opposite side.

[0008] Preferably, the vibrating pressure plate comprises a pressure plate body, and a pressure rod is fixed to the top center area of ​​the pressure plate body.

[0009] The present invention also provides a cylinder gasket vibration fatigue test structure, which can be used for fatigue testing by the cylinder gasket vibration fatigue test device. The cylinder gasket vibration fatigue test structure is provided with a cylinder hole in the middle area, and a plurality of cylinder gasket through holes are provided around the cylinder hole. The cylinder block simulation block is provided with a plurality of screw holes corresponding to the cylinder gasket through holes, and the cylinder gasket vibration fatigue test structure is fixed to the cylinder block simulation block by passing flat head bolts through the cylinder gasket through holes and screw holes. There are various specifications of cylinder gaskets to be tested (such as four cylinders and six cylinders). For unified experimental marking, they are all cut into single cylinder cylinder gaskets.

[0010] The present invention also proposes a cylinder gasket vibration fatigue test method, which is implemented based on the above-mentioned cylinder gasket vibration fatigue test device and includes the following steps:

[0011] Step S1, manufacturing a cylinder gasket vibration fatigue test structure, and installing the cylinder gasket vibration fatigue test structure between a cylinder head simulation block and a cylinder body simulation block;

[0012] Step S2, connecting the water inlet and the water outlet of the cylinder head simulation block and the cylinder body simulation block to the cooling circulation device respectively, injecting coolant into the coolant flow channels of the cylinder head simulation block and the cylinder body simulation block, connecting the top pressure rod of the vibration pressure plate to the vibration mechanical control device, placing a heating device in the heating through hole, and checking whether the entire device is intact, if it is intact, proceed to the next step;

[0013] Step S3, turning on the coolant circulation device and the vibration machine control device, controlling the temperature raising device to make the coolant perform cold and hot alternating circulation, observing whether there is any abnormality in the entire test device, judging whether it affects the subsequent tests according to the abnormality, terminating the test if there is any impact, investigating the cause of the fault, and continuing the subsequent tests if there is no impact;

[0014] Step S4, controlling the vibration mechanical control device to apply different transformation loads on the vibration pressure plate to perform a vibration test of a specified frequency. After completion, the cylinder gasket vibration fatigue test structure is removed, and the sealing, compression thickness and resilience of the cylinder gasket vibration fatigue test structure are tested and evaluated according to the test standards in the cylinder gasket design manual. If they meet the requirements, the entire cylinder gasket meets the anti-fatigue test standards.

[0015] Preferably, in step S1, manufacturing the cylinder gasket vibration fatigue test structure includes cutting the cylinder gasket to be tested into a cylinder gasket with a single cylinder hole, and opening cylinder gasket through holes corresponding to the screw holes on the cylinder simulation block around the cylinder hole.

[0016] Preferably, in step S2, detecting whether the entire device is intact includes checking the tested pipelines and other parts to ensure that they are in normal condition without abnormal conditions such as cracks or falling off.

[0017] Preferably, in step S3, the temperature of the coolant in the hot-cold alternating cycle is 45°C to 110°C.

[0018] Preferably, in step S3, the abnormal condition includes observing whether the equipment has oil leakage, water leakage, or air leakage.

[0019] Beneficial effects of the present invention:

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

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

[0022] Figure 1 A three-dimensional diagram of a cylinder gasket vibration fatigue test device according to the present invention;

[0023] Figure 2 for Figure 1 sectional view of

[0024] Figure 3 It is a schematic diagram of the coolant flow channel of the cylinder simulation block of the present invention;

[0025] Figure 4 A top view of the cylinder gasket vibration fatigue test structure of the present invention;

[0026] Figure 5 It is a flow chart of the cylinder gasket vibration fatigue test method of the present invention;

[0027] Reference numerals:

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

[0029] 2 cylinder head simulation block,

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

[0031] 4 cylinder block simulation,

[0032] 5 coolant 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 to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figures 1 to 3The cylinder gasket vibration fatigue test device shown includes a vibration pressure plate 1 arranged in sequence from top to bottom. The vibration pressure plate 1 includes a pressure plate body 11, and a pressure rod 12 is fixed to the top center area of ​​the pressure plate body 11. A cylinder head simulation block 2 and a cylinder block simulation block 4 are provided between the cylinder head simulation block 2 and the cylinder block simulation block 4. A cylinder gasket vibration fatigue test structure 3 is placed. Both the cylinder head simulation block 2 and the cylinder block simulation block 4 are provided with a coolant flow channel 5. The coolant flow channel 5 is a square flow channel composed of four horizontal channels 51 intersecting each other vertically. Plugs 511 are provided at both ends of the horizontal channel 51. A water inlet 52 is provided in the middle of one side of the coolant flow channel 5, and a water outlet 53 is provided in the middle of the opposite side. A temperature rise 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 gasket vibration fatigue test structure shown can be used to perform fatigue tests using the cylinder gasket vibration fatigue test device in Example 1. The cylinder gasket vibration fatigue test structure 3 has a cylinder hole 31 in the middle area, and a plurality of cylinder gasket through holes 32 are arranged around the cylinder hole. The cylinder block simulation block 4 has a plurality of screw holes 54 corresponding to the cylinder gasket through holes 32. The cylinder gaskets to be tested have various specifications (such as four-cylinder and six-cylinder), and they are all cut into single-cylinder cylinder gaskets for unified experimental marking.

[0043] Example 3

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

[0045] Step S1, manufacturing a cylinder gasket vibration fatigue test structure 3, the manufacturing of the cylinder gasket vibration fatigue test structure 3 includes cutting a cylinder gasket to be tested into a cylinder gasket with a single cylinder hole 31, opening a cylinder gasket through hole 32 corresponding to the screw hole 54 on the cylinder block simulation block 4 around the cylinder hole 31, installing the cylinder gasket vibration fatigue test structure between the cylinder head simulation block 2 and the cylinder block simulation block 4, and fixing the cylinder gasket vibration fatigue test structure 3 on the cylinder block simulation block 4 by passing a flat head bolt through the cylinder gasket through hole 32 and the screw hole 54;

[0046] Step S2, the water inlet 52 and the water outlet 53 of the cylinder head simulation block 2 and the cylinder body simulation block 4 are respectively connected to the cooling circulation device, the coolant is injected into the coolant flow channel 5 of the cylinder head simulation block 2 and the cylinder body simulation block 4, the top pressure rod 12 of the vibration pressure plate 1 is connected to the vibration mechanical control device, and the temperature raising device is placed in the temperature raising through hole 41, and the test pipelines and other parts are checked to ensure that they are in normal condition without abnormal conditions such as cracks and falling off;

[0047] Step S3, turn on the coolant circulation device and the vibration machine control device, control the heating device to make the coolant cycle alternately hot and cold, and the temperature of the coolant is 45℃~110℃ during the alternate cycle. Observe whether there are oil leakage, water leakage, and air leakage in the entire experimental device, and determine whether it affects the subsequent tests according to the abnormal situation. If there is an impact, terminate the test and investigate the cause of the fault. If there is no impact, continue the subsequent test;

[0048] Step S4, controlling the vibration mechanical control device to apply different transformation loads on the vibration pressure plate 1 to perform a vibration test of a specified frequency. After completion, the cylinder gasket vibration fatigue test structure 3 is removed, and the sealing, compression thickness and resilience of the cylinder gasket vibration fatigue test structure 3 are tested and evaluated according to the test standards in the cylinder gasket design manual. If they meet the requirements, the entire cylinder gasket meets the anti-fatigue test standards.

[0049] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A cylinder gasket vibration fatigue test device, characterized in that: The invention comprises a vibration pressure plate (1), a cylinder head simulation block (2), and a cylinder block simulation block (4) which are arranged in sequence from top to bottom; a cylinder gasket vibration fatigue test structure (3) is placed between the cylinder head simulation block (2) and the cylinder block simulation block (4); a coolant flow channel (5) is provided in each of the cylinder head simulation block (2) and the cylinder block simulation block (4); and a temperature raising through hole (41) is provided in the middle region of the cylinder block simulation block (4).

2. The cylinder gasket vibration fatigue test device according to claim 1, characterized in that: The coolant flow channel (5) is a square flow channel formed by four horizontal channels (51) intersecting each other perpendicularly, and plugs (511) are provided at both ends of the horizontal channels (51).

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

4. The cylinder gasket vibration fatigue test device according to claim 1, characterized in that: The vibrating pressure plate (1) comprises a pressure plate body (11), and a pressure rod (12) is fixed to the top center area of ​​the pressure plate body (11).

5. A cylinder gasket vibration fatigue test structure, wherein the cylinder gasket vibration fatigue test structure can be used to perform fatigue test using the cylinder gasket vibration fatigue test device according to any one of claims 1 to 4, characterized in that: A cylinder hole (31) is provided in the middle area of ​​the cylinder gasket vibration fatigue test structure (3), a plurality of cylinder gasket through holes (32) are provided around the cylinder hole (31), and a plurality of screw holes (54) corresponding to the cylinder gasket through holes (32) are provided on the cylinder body simulation block (4).

6. A cylinder gasket vibration fatigue test method, the method is implemented based on the cylinder gasket vibration fatigue test device according to any one of claims 1 to 4, characterized in that: The test method comprises the following steps: Step S1, manufacturing 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 the water inlet (52) and the water outlet (53) of the cylinder head simulation block (2) and the cylinder body simulation block (4) to the cooling circulation device respectively, injecting coolant into the coolant flow channel (5) of the cylinder head simulation block (2) and the cylinder body simulation block (4), connecting the top pressure rod (12) of the vibration pressure plate (1) to the vibration mechanical control device, placing a heating device in the heating through hole (41), and checking whether the entire device is intact. If it is intact, proceed to the next step; Step S3, turning on the coolant circulation device and the vibration machine control device, controlling the temperature raising device to make the coolant perform cold and hot alternating circulation, observing whether there is any abnormality in the entire test device, judging whether it affects the subsequent tests according to the abnormality, terminating the test if there is any impact, investigating the cause of the fault, and continuing the subsequent tests if there is no impact; Step S4, controlling the vibration mechanical control device to apply different transformation loads on the vibration pressure plate (1) to perform a vibration test of a specified frequency. After completion, the cylinder gasket vibration fatigue test structure (3) is removed, and the sealing, compression thickness and resilience of the cylinder gasket vibration fatigue test structure (3) are tested and evaluated according to the test standards. If they meet the requirements, the entire cylinder gasket meets the anti-fatigue test standards.

7. The cylinder head gasket vibration fatigue test method according to claim 6, characterized in that: In the step S1, manufacturing the cylinder gasket vibration fatigue test structure (3) includes cutting the cylinder gasket to be tested into a cylinder gasket with a single cylinder hole (31), and opening a cylinder gasket through hole (32) corresponding to the screw hole (54) on the cylinder block simulation block (4) around the cylinder hole (31).

8. The cylinder head gasket vibration fatigue test method according to claim 6, characterized in that: In step S2, checking whether the entire equipment is intact includes checking the tested pipelines and other parts to ensure that they are in normal condition without abnormal cracks or falling off.

9. The cylinder head gasket vibration fatigue test method according to claim 6, characterized in that: In step S3, the temperature of the coolant in the cold-hot alternating cycle is 45°C to 110°C.

10. The cylinder head gasket vibration fatigue test method according to claim 6, characterized in that: In step S3, the abnormal condition includes observing whether the equipment has oil leakage, water leakage, or air leakage.

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