Rheological testing device for sealing performance of new material cylinder cover

Abstract

The invention relates to the field of air cylinder detection, in particular to a new material air cylinder cover sealing performance rheological testing device which comprises a cylinder body and further comprises a positioning table, a positioning and clamping assembly and a combining and assembling assembly, the positioning and clamping assembly comprises a translation driving mechanism and two sets of sliding bases, and each set of sliding bases is provided with two pressing rods; a first elastic piece is arranged between each pressing rod and the corresponding sliding seat, an edge sealing shell is arranged on each pressing rod, a plurality of rheological property sensors are arranged in each edge sealing shell, the combining and assembling assembly comprises two pushing assemblies, and each pushing assembly comprises a fixing seat, a pushing seat and a second elastic piece. A first end cover and a second end cover are arranged on the two pushing seats correspondingly, and a driving piece is arranged above the positioning table. The device adopts a rheological property sensor to test rheological properties, including creep property, stress relaxation and viscoelastic response, of a new material for sealing the cylinder cover under the action of pressure.

Description

Technical Field

[0001] The invention relates to the field of cylinder head new material detection, and in particular to an automatic testing device for testing the rheological properties of new materials used for cylinder head sealing. Background Art

[0002] The rheological properties of new materials are key indicators for evaluating their long-term reliability. By testing parameters such as creep rate, stress relaxation time constant, and dynamic modulus under different temperature and pressure conditions, it is possible to predict the material's performance degradation under actual operating conditions. This is crucial for ensuring the long-term stability of cylinder head sealing systems.

[0003] With the development of new material technologies, cylinder head seals are increasingly adopting new materials such as high-performance polymers and rubber composites. The rheological properties of these new materials under high-temperature and high-pressure environments directly impact the sealing effectiveness of the cylinder head. Traditional rheological testing cannot accurately assess the rheological characteristics of new materials under actual operating conditions, including key parameters such as viscoelasticity, creep properties, and stress relaxation.

[0004] After production, the existing rotating cylinder needs to be tested for rheological properties, mainly to detect whether there is any pressure medium leakage between the cylinder body and the cylinder head. The traditional detection method usually puts the entire rotating cylinder into water and then tests the pressure of the rotating cylinder. If bubbles are generated in the water, it means that there is a large gap between the cylinder body and the cylinder head. Therefore, the rotating cylinder needs to be subsequently processed. After the traditional method is used for testing, the rotating cylinder needs to be dried, which takes a certain amount of time and requires a certain amount of equipment cost. After the complete rotating cylinder is tested, if the product is unqualified, the rotating cylinder needs to be disassembled for secondary processing, which will greatly reduce production efficiency. Therefore, it is necessary to provide a new material cylinder head sealing performance rheological testing device to solve the above problems. Summary of the Invention

[0005] Based on this, it is necessary to provide a new material cylinder head sealing performance rheological testing device to address the existing technical problems.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: a rheological test device for the sealing performance of a new material cylinder head, which can simulate the actual working environment of the cylinder head and test the rheological properties of the new material seal by applying controllable pressure and temperature. It specifically includes a cylinder body, a groove is provided at the bottom of the cylinder body, and also includes a positioning table, a positioning clamping component and a combined assembly component. The positioning table is rectangular and fixedly arranged. A pin that matches the groove is formed on the top of the positioning table. The positioning clamping component includes a translation drive mechanism and two groups of slides. The translation drive mechanism is arranged below the positioning table. The two groups of slides are symmetrically arranged on two sides of the positioning table. Each group of slides is connected to the translation drive mechanism. The two sliding seats are connected, each set of sliding seats is provided with two symmetrical pressure rods, each pressure rod is provided with a No. 1 elastic member between the corresponding sliding seat, each pressure rod is provided with an edge sealing shell, each edge sealing shell is provided with a number of rheological performance sensors, the combined assembly components include two groups of pushing components symmetrically arranged on the other two sides of the positioning platform, each group of pushing components includes a fixed seat, a pushing seat and a No. 2 elastic member, the pushing seat is arranged on the fixed seat, the No. 2 elastic member is arranged between the pushing seat and the fixed seat, the two pushing seats are respectively provided with a No. 1 end cover and a No. 2 end cover, the No. 1 end cover is provided with an air inlet nozzle and an air outlet nozzle, and a driving member for synchronously driving the two pushing seats to translate toward each other is provided above the positioning platform.

[0007] Furthermore, a horizontal support plate is provided under the positioning platform, and the positioning platform is fixed to the top of the support plate. The translation drive mechanism includes a threaded rod and two groups of guide seats. A through slot is provided at the lower end of the positioning platform, and the threaded rod is horizontally connected to the top of the support plate for rotation, and the threaded rod passes through the through slot. The two groups of guide seats are respectively located on both sides of the positioning platform, and each group of guide seats is fixedly connected to the top of the support plate, and each group of slides is slidably connected to the corresponding guide seat. The threaded rod is provided with two groups of threaded portions in a symmetrical state and in opposite directions of rotation, and each group of slides is provided with a threaded sleeve, and the two threaded sleeves are respectively threadedly engaged with the two threaded portions on the threaded rod.

[0008] Furthermore, each group of guide seats includes two symmetrical strip seats, each strip seat is horizontally fixedly connected to the top of the support plate, and each strip seat is provided with a horizontal slide groove. Each group of slide seats includes a slide and a flat plate. The slide is L-shaped, and two symmetrical sliders are formed on the horizontal end of the slide. Each slider slides in the corresponding slide groove. The flat plate is fixed on the horizontal end of the slide, and each threaded sleeve is fixed to the bottom of the flat plate.

[0009] Furthermore, each pressure rod is vertically arranged on the vertical end of the slide, and each pressure rod is formed with several No. 1 limit shafts equidistantly distributed along the length direction of the pressure rod, each No. 1 limit shaft is perpendicular to the pressure rod, and each No. 1 limit shaft passes through the vertical end of the slide, the No. 1 elastic member includes several No. 1 springs, each No. 1 spring is sleeved on the corresponding No. 1 limit shaft, and both ends of each No. 1 spring are respectively in conflict with the vertical ends of the pressure rod and the slide, and a No. 1 limit nut is screwed on one end of each No. 1 limit shaft passing through the slide.

[0010] Furthermore, each edge sealing shell includes a strip-shaped vertical shell and two strip-shaped end shells. The strip-shaped vertical shell is fixedly connected to the corresponding pressure rod. The two strip-shaped end shells are respectively formed at the two ends of the strip-shaped vertical shell, and each strip-shaped end shell is horizontal. The side of each strip-shaped vertical shell facing the cylinder body is an open structure, and the end of each strip-shaped end shell facing the cylinder body is an open structure. The opposite sides of the two strip-shaped end shells are open structures. Several rheological performance sensors are fixed in the strip-shaped vertical shell at equal distances along the length direction of the strip-shaped end shell.

[0011] Furthermore, each fixed seat is fixed to the top of the support plate, and each fixed seat is formed with several guide shafts equidistantly distributed in the horizontal direction, each guide shaft is horizontal, and the bottom of each sliding seat is fixed with several guide sleeves corresponding to the guide shaft, and each guide sleeve is sleeved on the corresponding guide shaft.

[0012] Furthermore, each fixed seat is formed with several No. 2 limit shafts, each No. 2 limit shaft is parallel to the corresponding guide shaft, and each No. 2 limit shaft passes through the corresponding sliding seat. The No. 2 elastic member includes several No. 2 springs corresponding to the No. 2 limit shaft, each No. 2 spring is sleeved on the No. 2 limit shaft, and each No. 2 spring is respectively in conflict with the fixed seat and the sliding seat, and a No. 2 limit nut is screwed on one end of each No. 2 limit shaft passing through the sliding seat.

[0013] Furthermore, the driving member includes a lifting frame, a No. 1 resistance member and a No. 2 resistance member. The lifting frame is arranged above the positioning platform. The No. 1 resistance member includes a No. 1 lower pressure bar and a No. 1 oblique wedge block. The No. 1 lower pressure bar is vertically fixed to the bottom of the lifting frame. The No. 1 oblique wedge block is fixedly connected to the No. 1 end cover. The lower end of the No. 1 lower pressure bar is provided with a No. 1 inclined surface that cooperates with the oblique wedge of the No. 1 oblique wedge block. The No. 2 resistance member includes a No. 2 lower pressure bar and a No. 2 oblique wedge block. The No. 2 lower pressure bar is vertically fixed to the bottom of the lifting frame. The No. 2 oblique wedge block is fixedly connected to the No. 2 end cover. The lower end of the No. 2 lower pressure bar is provided with a No. 2 oblique surface that cooperates with the oblique wedge of the No. 2 oblique wedge block.

[0014] Furthermore, a gear is coaxially fixed to one end of the threaded rod, and a strip guide seat fixed to the top of the support plate is provided next to the gear. A rack sliding in the vertical direction is provided in the strip guide seat, and the rack is engaged with the gear. The top of the rack is fixed to the bottom of the lifting frame, and an avoidance opening for the rack to pass through is opened on the support plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: First, when this device is testing, the only product tested is the cylinder body, while the two cylinder heads are separately installed on two sliding seats. During testing, the cylinder body is placed on the positioning table, and then the cylinder heads are pressed onto the cylinder body by the sliding seats to merge them. In this way, if a product fails the test, the unqualified product can be directly processed on site without the need for subsequent disassembly process, which greatly improves production efficiency. Secondly, the positioning and clamping assembly of the device is used to press the cylinder body to ensure that the position of the cylinder body will not shift. The combined assembly assembly of the device is used to press the two cylinder heads respectively on the two ends of the cylinder body. The positioning and clamping assembly and the combined assembly assembly are both driven by the lifting frame, thereby reducing the number of driving devices and thus reducing the cost of driving equipment.

[0016] Third, this device uses a combination of various types of rheological performance sensors, which can comprehensively evaluate the viscoelastic characteristics, creep behavior and stress relaxation properties of new materials, providing a quantitative scientific basis for the research and development and quality control of new materials, and has significant technical advantages over traditional qualitative detection methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 yes Figure 1 A1 is a partial enlarged schematic diagram; Figure 3 yes Figure 1 A2 is a partial enlarged schematic diagram; Figure 4 is a top view of the present invention; Figure 5 yes Figure 4 Sectional view along line AA; Figure 6 yes Figure 4 Cross-sectional view along line BB; Figure 7 This is a three-dimensional structural exploded view of the cylinder body and positioning platform; Figure 8 1. It is a schematic diagram of the three-dimensional structure of the translation drive mechanism; Figure 9 This is an exploded view of the three-dimensional structure of the bar seat and the slide; Figure 10It is a schematic diagram of the three-dimensional structure of the edge-sealed shell; Figure 11 1. It is a schematic diagram of the three-dimensional structure of the push assembly; Figure 12 It is a schematic diagram of the three-dimensional structure after the No. 1 end cover and the No. 2 end cover are combined with the cylinder body.

[0018] The numbers in the figure are: 1. Cylinder; 2. Groove; 3. Positioning table; 4. Latch; 5. Slide; 6. Pressure rod; 7. Edge sealing shell; 8. Rheological performance sensor; 9. Fixed seat; 10. Sliding seat; 11. End cover No. 1; 12. End cover No. 2; 13. Air inlet nozzle; 14. Air outlet nozzle; 15. Support plate; 16. Threaded rod; 17. Through groove; 18. Threaded sleeve; 19. Strip seat; 20. Slide; 21. Slide; 22. Flat plate; 23. Slider; 24. Limiting axis No. 1 ; 25. Spring No. 1; 26. Limit nut No. 1; 27. Strip vertical shell; 28. Strip end shell; 29. ​​Guide shaft; 30. Guide sleeve; 31. Limit shaft No. 2; 32. Spring No. 2; 33. Limit nut No. 2; 34. Lifting frame; 35. Lower pressure strip No. 1; 36. Oblique wedge block No. 1; 37. Inclined surface No. 1; 38. Lower pressure strip No. 2; 39. Oblique wedge block No. 2; 40. Inclined surface No. 2; 41. Gear; 42. Strip guide seat; 43. Avoidance; 44. Rack. DETAILED DESCRIPTION

[0019] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] refer to Figures 1 to 12 The device is a new material cylinder head sealing performance rheological test device, which can simulate the actual working environment of the cylinder head and test the rheological properties of the new material seal by applying controllable pressure and temperature. Specifically, it includes a cylinder body 1, and a groove 2 is provided at the bottom of the cylinder body 1 (such as Figure 7 The cam 2 is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, and the movable members are connected to the cam 2 by the movable member. Figure 3As shown in the figure), the second elastic member is arranged between the sliding seat 10 and the fixed seat 9, and the two sliding seats 10 are respectively provided with a first end cover 11 and a second end cover 12. The first end cover 11 is provided with an air inlet nozzle 13 and an air outlet nozzle 14. A driving member for synchronously driving the two sliding seats 10 to translate toward each other is provided above the positioning platform 3.

[0021] When the cylinder 1 is in the state of being rotated, the cylinder 1 of this device is put on the positioning platform 3, and the cylinder 1 of this device is used for the rheological property test of the new material of the rotary cylinder seal. The cylinder body 1, the first end cover 11 and the second end cover 12 of this device are all existing technologies, and the cylinder body 1, the first end cover 11 and the second end cover 12 are all provided with air ducts for the circulation of pressure medium. When the rheological property test is carried out, the horizontal cylinder body 1 is placed downward on the positioning platform 3. During this process, the pin 4 provided on the top of the positioning platform 3 will be inserted upward into the groove 2 at the bottom of the cylinder body 1. The pin 4 and the groove 2 cooperate to prevent the cylinder body 1 from deviating left and right on the positioning platform 3. However, the cylinder body 1 can still rotate at this time. Thereafter, the translation drive mechanism will drive the two sets of slides 5 to approach each other, and the slides 5 will drive the corresponding pressure rods 6 to press against the outer wall of the cylinder body 1. Finally, the cylinder body 1 is pressed straight by the pressure rods 6 on the two sets of slides 5. When the pressure rods 6 are pressed against the outer wall of the cylinder body 1, each sealing shell 7 provided on the pressure rods 6 will fit with the outer wall of the cylinder body 1, and each The sealing shells 7 correspond to the end edges of one end of the cylinder body 1. When the cylinder body 1 is pressed, the driving member drives the two sliding seats 10 to approach each other. During this process, the two sliding seats 10 will respectively drive the No. 1 end cover 11 and the No. 2 end cover 12 to press against the two ends of the cylinder body 1. Finally, the No. 1 end cover 11 and the No. 2 end cover 12 will be tightly attached to the two ends of the cylinder body 1. When the No. 1 end cover 11 and the No. 2 end cover 12 are pressed against the two ends of the cylinder body 1, the No. 1 end cover 11 and the cylinder body 1 and the No. 2 end cover 12 are pressed against the two ends of the cylinder body 1. A connecting seam forms between the cylinder body 1 and the sealing shells 7. The two corresponding sealing shells 7 merge toward each other, covering the corresponding connecting seam. Then, pressure medium is injected into the cylinder body 1 through the air inlet nozzle 13. The pressure medium passes through the first end cap 11, the cylinder body 1, and the second end cap 12 in sequence, and is finally discharged through the air outlet nozzle 14. During this process, as the first and second end caps 11 and 12 press against the ends of the cylinder body 1, the new material seal deforms under the pressure. At this point, the rheological performance sensor 8 (including strain sensors, displacement sensors, and pressure sensors) within the sealing shell 7 begins to monitor the rheological response of the new material in real time. This can monitor the deformation, stress distribution, and viscoelastic response of the new material seal under pressure in real time. The rheological performance sensor 8 should include a combination of the following types of sensors: strain sensors, displacement sensors, and pressure sensors. These sensors work together to monitor the rheological response of the new material seal in real time during testing.

[0022] When the No. 1 end cap 11 and the No. 2 end cap 12 are pressed against the two ends of the cylinder body 1, the new material seal placed on the joint surface will be subjected to pressure. At this time, the rheological property sensor 8 starts to work: First, a pressure sensor measures the actual pressure applied to the new material, ensuring accurate test conditions. As pressure is applied, the new material seal deforms, and a displacement sensor precisely measures the material's compression and lateral flow displacement. A strain sensor monitors the stress distribution and strain response within the material.

[0023] Instead of a simple pressure medium, the inlet nozzle 13 applies a controllable hydraulic medium or air pressure, which is used to apply a constant or cyclically varying load to the new material. This loading method simulates the pressure cycles experienced in actual cylinder head operation and allows testing of the new material's creep, stress relaxation, and fatigue properties.

[0024] At the same time, each push seat 10 is reset by the second elastic member, so that the pressure rod 6, the first end cover 11 and the second end cover 12 are synchronously separated from the cylinder body 1, and finally the cylinder body 1 can be removed from the positioning platform 3.

[0025] The data collected by the rheological properties sensor 8 includes the material's instantaneous deformation, stress-strain curve, relaxation modulus over time, and hysteresis loops under cyclic loading. These data, recorded by a high-frequency acquisition system, accurately reflect the viscoelastic characteristics of the new material.

[0026] During testing, if the material's rheological properties do not meet requirements, such as excessive creep rate or rapid stress relaxation, the sensor immediately detects the abnormal data. The system then determines whether the material is qualified based on pre-set rheological performance standards. This provides a better reflection of the material's long-term performance than traditional rheological testing.

[0027] The entire testing process remains automated, but the focus shifts from simple sealing to the inherent performance of the material. Once cylinder 1 is positioned, the system performs a multi-stage test according to a pre-set test procedure: a pre-load phase tests the material's initial response, a constant load phase tests creep performance, an unloading phase tests elastic recovery, and a cyclic loading phase tests fatigue properties.

[0028] The multiple rheological property sensors 8 in each edge sealing shell 7 are evenly distributed along the sealing surface, and can obtain the spatial distribution characteristics of the rheological properties of the material, which is of great significance for evaluating the uniformity and anisotropy of new materials.

[0029] This technological upgrade enables the device to not only test the immediate sealing effectiveness of cylinder heads but, more importantly, predict the performance changes of new material seals over the long term, providing a scientific basis for the research, development, and application of new materials. This shift from superficial testing to essential testing fully demonstrates the device's technological advancement in the field of new material testing.

[0030] In order to show the specific structure of the translation drive mechanism, the following features are set: A horizontal support plate 15 is provided below the positioning platform 3, and the positioning platform 3 is fixed to the top of the support plate 15. The translation drive mechanism includes a threaded rod 16 and two groups of guide seats. A through slot 17 is provided at the lower end of the positioning platform 3. The threaded rod 16 is horizontally connected to the top of the support plate 15 for rotation, and the threaded rod 16 passes through the through slot 17. The two groups of guide seats are respectively located on both sides of the positioning platform 3, and each group of guide seats is fixedly connected to the top of the support plate 15. Each group of slides 5 is slidably connected to the corresponding guide seat. The threaded rod 16 is provided with two groups of threaded portions in a symmetrical state and in opposite directions of rotation. Each group of slides 5 is provided with a threaded sleeve 18, and the two threaded sleeves 18 are respectively threadedly engaged with the two threaded portions on the threaded rod 16.

[0031] When the threaded rod 16 rotates, the threaded rod 16 will drive the threaded sleeve 18 to rotate, but since the slide 5 is slidably connected to the guide seat, the slide 5 is restricted from rotating, and eventually the slide 5 will translate along the axial direction of the threaded rod 16, and since the two threaded portions on the threaded rod 16 rotate in opposite directions, the two slides 5 will move toward or away from each other. When the two slides 5 move toward each other, each slide 5 will drive the corresponding two pressure rods 6 to press against the outer wall of the cylinder body 1, and finally the cylinder body 1 on the positioning platform 3 will be pressed straight by a pair of pressure rods 6 on each slide 5. When the two slides 5 move away from each other, each pressure rod 6 will separate from the cylinder body 1, and finally the cylinder body 1 can be removed from the positioning platform 3. In order to specifically show the specific structure of the slide 5 and the guide seat, the following features are set: Each set of guide seats includes two symmetrical strip seats 19, each strip seat 19 is horizontally fixed to the top of the support plate 15, and a horizontal slide groove 20 is opened in each strip seat 19. Each set of slide seats 5 includes a slide 21 and a flat plate 22. The slide 21 is L-shaped, and two symmetrical sliders 23 (such as Figure 9 As shown), each slider 23 slides in the corresponding slide groove 20, the flat plate 22 is fixed to the horizontal end of the slide 21, and each threaded sleeve 18 is fixed to the bottom of the flat plate 22.

[0032] The slide 21 in the slide 5 slides on the two guide seats via the slider 23 at the bottom thereof. The cooperation between the slider 23 and the slide groove 20 ensures that the entire slide 5 can only move in the horizontal direction.

[0033] In order to show the specific structure of elastic member No. 1, the following features are set: Each pressure rod 6 is vertically arranged on the vertical end of the slide 21, and each pressure rod 6 is formed with several No. 1 limit shafts 24 distributed equidistantly along the length direction of the pressure rod 6. Each No. 1 limit shaft 24 is perpendicular to the pressure rod 6, and each No. 1 limit shaft 24 passes through the vertical end of the slide 21. The No. 1 elastic member includes several No. 1 springs 25, and each No. 1 spring 25 is sleeved on the corresponding No. 1 limit shaft 24. The two ends of each No. 1 spring 25 respectively conflict with the pressure rod 6 and the vertical end of the slide 21, and a No. 1 limit nut 26 is screwed on one end of each No. 1 limit shaft 24 passing through the slide 21.

[0034] In the initial state, the No. 1 spring 25 releases its elastic force to drive the pressure rod 6 to translate toward the cylinder body 1 until the No. 1 limit nut 26 on the No. 1 limit shaft 24 conflicts with the vertical end of the slide 21. At this time, the No. 1 limit nut 26 is used to prevent the No. 1 limit shaft 24 from separating from the slide 21. When the slide 5 translates toward the cylinder body 1, the pressure rod 6 provided on the slide 21 will gradually press toward the outer wall of the cylinder body 1. When the pressure rod 6 conflicts with the outer wall of the cylinder body 1, the skewed cylinder body 1 is straightened by four pressure rods 6 distributed in a matrix, and as the slide 21 continues to translate, each No. 1 spring 25 will be compressed by the pressure rod 6 and the slide 21, so that the No. 1 spring 25 will generate elastic force, and then the No. 1 spring 25 is used to ensure that the pressure rod 6 can be tightly pressed against the outer wall of the cylinder body 1.

[0035] In order to show the specific structure of the edge shell 7, the following features are set: Each edge-sealing shell 7 includes a strip-shaped vertical shell 27 and two strip-shaped end shells 28. The strip-shaped vertical shell 27 is fixedly connected to the corresponding pressure rod 6. The two strip-shaped end shells 28 are respectively formed at both ends of the strip-shaped vertical shell 27, and each strip-shaped end shell 28 is horizontal. The side of each strip-shaped vertical shell 27 facing the cylinder body 1 is an open structure, and the end of each strip-shaped end shell 28 facing the cylinder body 1 is an open structure. The opposite sides of the two strip-shaped end shells 28 are open structures. Several rheological performance sensors 8 are fixed in the strip-shaped vertical shell 27 at equal distances along the length direction of the strip-shaped end shell 28 (such as Figure 10 shown).

[0036] When the two slides 5 move toward each other, each pressure rod 6 will drive the strip-shaped vertical shell 27 to press against the cylinder body 1. Finally, when the pressure rod 6 is pressed against the outer wall of the cylinder body 1, each strip-shaped vertical shell 27 will fit against the outer wall of the cylinder body 1. At this time, the two strip end shells 28 will fit against the top and bottom surfaces of the cylinder body 1 respectively. When the No. 1 end cover 11 and the No. 2 end cover 12 are pressed against the two ends of the cylinder body 1 respectively, each edge sealing shell 7 will cover the joint area where the new material seal is located (such as Figure 2 and Figure 12 As shown), the strip-shaped vertical shell 27 covers the vertical side of the joint, and the strip-shaped end shell 28 covers the horizontal side of the joint.

[0037] During the actual testing process, rheological properties sensor 8 monitors the deformation characteristics of the new material seal under pressure in real time. The sensor collects data including material compression, lateral flow displacement, stress distribution, and relaxation modulus over time. Pressure medium applied via intake nozzle 13 creates a controllable load on the new material, simulating actual cylinder head operating conditions, thereby accurately assessing whether the new material's rheological properties meet operational requirements.

[0038] In order to show how the push seat 10 is installed on the fixed seat 9, the following features are set: Each fixed seat 9 is fixed to the top of the support plate 15, and each fixed seat 9 is formed with several guide shafts 29 equidistantly distributed in the horizontal direction, and each guide shaft 29 is horizontal. The bottom of each sliding seat 10 is fixed with several guide sleeves 30 corresponding to the guide shaft 29, and each guide sleeve 30 is sleeved on the corresponding guide shaft 29.

[0039] The sliding seat 10 slides on the guide shaft 29 through the guide sleeve 30 at its bottom. The cooperation between the guide shaft 29 and the guide sleeve 30 ensures that the sliding seat 10 can only move horizontally. When the driving part is started, the two sliding seats 10 will respectively drive the No. 1 end cover 11 and the No. 2 end cover 12 to press toward the two ends of the cylinder body 1. Finally, when the No. 1 end cover 11 and the No. 2 end cover 12 are pressed against the cylinder body 1, the No. 1 end cover 11, the No. 2 end cover 12 and the cylinder body 1 form a complete rotating cylinder.

[0040] In order to show the specific structure of the second elastic member, the following features are set: Each fixed seat 9 is formed with several No. 2 limiting shafts 31, each No. 2 limiting shaft 31 is parallel to the corresponding guide shaft 29, and each No. 2 limiting shaft 31 passes through the corresponding sliding seat 10. The No. 2 elastic member includes several No. 2 springs 32 corresponding to the No. 2 limiting shaft 31, each No. 2 spring 32 is sleeved on the No. 2 limiting shaft 31, and each No. 2 spring 32 is respectively in conflict with the fixed seat 9 and the sliding seat 10, and a No. 2 limiting nut 33 is screwed on one end of each No. 2 limiting shaft 31 passing through the sliding seat 10.

[0041] In the initial state, the No. 2 spring 32 releases its elastic force to drive the push seat 10 to move horizontally away from the cylinder body 1 until the push seat 10 conflicts with the No. 2 limit nut 33. The No. 2 limit nut 33 is used to prevent the push seat 10 from separating from the No. 2 limit shaft 31. When the driving part is started, the two push seats 10 will be pressed toward the two ends of the cylinder body 1 respectively. During this process, each push seat 10 will compress the No. 2 spring 32, so that the No. 2 spring 32 generates elastic force. When the detection is completed, the elastic force of the No. 2 spring 32 drives the corresponding push seat 10 to reset.

[0042] In order to show the specific structure of the driver, the following features are set: The driving member includes a lifting frame 34, a first contact member and a second contact member (such as Figure 5 As shown), the lifting frame 34 is arranged above the positioning platform 3, and the No. 1 interference member includes a No. 1 lower pressure bar 35 and a No. 1 oblique wedge block 36. The No. 1 lower pressure bar 35 is vertically fixed to the bottom of the lifting frame 34, and the No. 1 oblique wedge block 36 is fixedly connected to the No. 1 end cover 11. The lower end of the No. 1 lower pressure bar 35 is provided with a No. 1 inclined surface 37 that cooperates with the No. 1 oblique wedge block 36. The No. 2 interference member includes a No. 2 lower pressure bar 38 and a No. 2 oblique wedge block 39. The No. 2 lower pressure bar 38 is vertically fixed to the bottom of the lifting frame 34, and the No. 2 oblique wedge block 39 is fixedly connected to the No. 2 end cover 12. The lower end of the No. 2 lower pressure bar 38 is provided with a No. 2 oblique surface 40 that cooperates with the No. 2 oblique wedge block 39.

[0043] When the lifting frame 34 is lowered, the lifting frame 34 will synchronously drive the No. 1 lower pressure bar 35 and the No. 2 lower pressure bar 38 to descend. After that, the No. 1 lower pressure bar 35 will downwardly conflict with the No. 1 inclined wedge block 36. At this time, through the cooperation of the No. 1 inclined surface 37 and the No. 1 inclined wedge block 36, the corresponding push seat 10 will be driven to translate toward one end of the cylinder body 1. Similarly, when the No. 2 lower pressure bar 38 conflicts with the No. 2 inclined wedge block 39, the corresponding push seat 10 will be driven to translate toward the other end of the cylinder body 1 through the cooperation of the No. 2 inclined surface 40 and the No. 2 inclined wedge block 39. Finally, the two push seats 10 will respectively drive the No. 1 end cover 11 and the No. 2 end cover 12 to press against the two ends of the cylinder body 1.

[0044] In order to be able to synchronously drive the slide 5 and the push seat 10, the following features are set: One end of the threaded rod 16 is coaxially fixed with a gear 41 (such as Figure 8 As shown in the figure, a strip-shaped guide seat 42 is provided on the side of the gear 41 and is fixedly connected to the top of the support plate 15. A rack 44 that slides in the vertical direction is provided in the strip-shaped guide seat 42, and the rack 44 is engaged with the gear 41. The top of the rack 44 is fixedly connected to the bottom of the lifting frame 34, and an avoidance opening 43 is opened on the support plate 15 for the rack 44 to pass through.

[0045] When the lifting frame 34 descends, the lifting frame 34 will synchronously drive the No. 1 lower pressure bar 35, the No. 2 lower pressure bar 38 and the rack 44 to descend. During this process, the rack 44 engaged with the gear 41 will drive the gear 41 to rotate, so that the gear 41 will drive the threaded rod 16 to rotate, and finally the two slides 5 will be driven to translate toward each other. When the two slides 5 translate until the pressure rod 6 conflicts with the cylinder body 1, the No. 1 inclined surface 37 on the No. 1 lower pressure bar 35 will fit with the No. 1 inclined wedge block 36, and the No. 2 inclined surface 40 on the No. 2 lower pressure bar 38 will fit with the No. 2 inclined wedge block 39. Thereafter, as the two slides 5 translate to the point where the pressure rod 6 conflicts with the cylinder body 1, the No. 1 inclined surface 37 on the No. 1 lower pressure bar 35 will fit with the No. 1 inclined wedge block 36, and the No. 2 inclined surface 40 on the No. 2 lower pressure bar 38 will fit with the No. 2 inclined wedge block 39. As the lifting frame 34 continues to descend, the pressure rod 6 pressed on the outer wall of the cylinder body 1 will compress the No. 1 spring 25, and the two push seats 10 will be driven to translate toward the two ends of the cylinder body 1. During this process, the No. 1 spring 25 not only ensures that the pressure rod 6 can be tightly pressed against the outer wall of the cylinder body 1, but also the No. 1 spring 25 gives the slide 5 a wide capacity to continue to translate toward the cylinder body 1. Finally, the lifting frame 34 can control the pressure rod 6, the No. 1 end cover 11 and the No. 2 end cover 12 to be pressed toward the cylinder body 1, and the pressure rod 6 is first pressed on the cylinder body 1, and the No. 1 end cover 11 and the No. 2 end cover 12 are pressed on the cylinder body 1 later.

[0046] Working principle: This device is used to test the rheological properties of new material seals for rotating cylinders. The cylinder body 1, end cover No. 11 and end cover No. 2 12 of this device are all existing technologies, and the cylinder body 1, end cover No. 11 and end cover No. 2 12 are all provided with channels for the circulation of pressure medium. When conducting the rheological performance test, the new material seal to be tested is pre-installed on the joint surfaces at both ends of the cylinder body 1, and then the cylinder body 1 is placed downward on the positioning platform 3. During this process, the pin 4 provided on the top of the positioning platform 3 will be inserted upward into the groove 2 at the bottom of the cylinder body 1, and the pin 4 and the groove 2 cooperate to prevent the cylinder body 1 from shifting left and right on the positioning platform 3. However, at this time, the cylinder body 1 may still rotate slightly.

[0047] The translation drive mechanism then drives the two sets of slides 5 toward each other, which in turn drive the corresponding pressure rods 6 to press against the outer wall of the cylinder body 1. Ultimately, the pressure rods 6 on the two sets of slides 5 press the cylinder body 1 into the correct position. When the pressure rods 6 press against the outer wall of the cylinder body 1, each edge sealing shell 7 mounted on the pressure rods 6 conforms to the outer wall of the cylinder body 1, and the rheological properties sensor 8 in each edge sealing shell 7 is aligned with the corresponding test area of ​​the new material seal.

[0048] After the cylinder body 1 is positioned, the driving member drives the two sliding seats 10 toward each other. During this process, the two sliding seats 10 will respectively drive the No. 1 end cover 11 and the No. 2 end cover 12 to press against the two ends of the cylinder body 1. Finally, the No. 1 end cover 11 and the No. 2 end cover 12 will apply a predetermined pressing force to the new material seal. When the No. 1 end cover 11 and the No. 2 end cover 12 are pressed tightly, the new material seals between the No. 1 end cover 11 and the cylinder body 1 and between the No. 2 end cover 12 and the cylinder body 1 begin to deform. At this time, the rheological property sensor 8 in the edge sealing shell 7 will monitor the deformation characteristics of the material in real time.

[0049] During the test, pressure medium is injected into cylinder 1 through inlet nozzle 13, applying a controllable test pressure. The pressure medium passes through end cap 11, cylinder 1, and end cap 12, ultimately exiting through outlet nozzle 14. During this process, rheological performance sensor 8 continuously collects strain data, compression, lateral flow displacement, and stress distribution of the new material seal under different pressure conditions. The system records the material's stress-strain curve, the time-varying relaxation modulus curve, and the hysteresis characteristics under cyclic loading.

[0050] If test data indicates that the new material's rheological properties do not meet preset standards, such as excessive creep rate or excessive stress relaxation, the material formulation needs to be optimized or the material type needs to be changed. The system can evaluate the rheological properties of new material seals of varying thicknesses and formulations through multiple tests, providing a scientific basis for product design.

[0051] After the test is complete, the translation drive mechanism drives the two slides 5 to translate in opposite directions. Simultaneously, each pusher 10 is reset by the second elastic member. The pressure rod 6, the first end cap 11, and the second end cap 12 are simultaneously separated from the cylinder body 1. Finally, the cylinder body 1 and the tested new material sample can be removed from the positioning table 3 for subsequent analysis or replacement with a new test sample for continued testing.

[0052] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A new material cylinder head sealing performance rheological testing device, which can simulate the actual working environment of the cylinder head and test the rheological characteristics of the new material seal by applying controllable pressure and temperature, specifically comprising a cylinder body (1), the bottom of the cylinder body (1) is provided with a groove (2), and is characterized in that: The positioning platform (3) further comprises a positioning clamping assembly and a combined assembly assembly. The positioning platform (3) is rectangular and fixedly arranged. A latch (4) that matches the groove (2) is formed on the top of the positioning platform (3). The positioning clamping assembly comprises a translation drive mechanism and two groups of slides (5). The translation drive mechanism is arranged below the positioning platform (3). The two groups of slides (5) are symmetrically arranged on two sides of the positioning platform (3). Each group of slides (5) is connected to the translation drive mechanism. Two symmetrical pressure rods (6) are provided on each group of slides (5). A No. 1 elastic member is provided between each pressure rod (6) and the corresponding slide (5). Each pressure rod (6) is provided with an edge sealing shell (7). A plurality of rheological performance sensors (8) are provided in each edge sealing shell (7). The device (8) includes a combination of a strain sensor, a displacement sensor and a pressure sensor, which is used to monitor the stress-strain relationship, compression deformation and relaxation modulus of the new material seal in real time. The combined assembly component includes two groups of push components symmetrically arranged on the other two sides of the positioning platform (3). Each group of push components includes a fixed seat (9), a push seat (10) and a second elastic member. The push seat (10) is arranged on the fixed seat (9), and the second elastic member is arranged between the push seat (10) and the fixed seat (9). The two push seats (10) are respectively provided with a first end cover (11) and a second end cover (12). The first end cover (11) is provided with an air inlet nozzle (13) and an air outlet nozzle (14). A driving member for synchronously driving the two push seats (10) to move toward each other is provided above the positioning platform (3).

2. A new material cylinder head sealing performance rheological testing device according to claim 1, characterized in that: A horizontal support plate (15) is provided below the positioning platform (3), and the positioning platform (3) is fixed to the top of the support plate (15). The translation drive mechanism includes a threaded rod (16) and two groups of guide seats. A through slot (17) is provided at the lower end of the positioning platform (3). The threaded rod (16) is horizontally connected to the top of the support plate (15) for rotation, and the threaded rod (16) passes through the through slot (17). The two groups of guide seats are respectively located on both sides of the positioning platform (3), and each group of guide seats is fixedly connected to the top of the support plate (15). Each group of slides (5) is slidably connected to the corresponding guide seat. The threaded rod (16) is provided with two groups of threaded portions in a symmetrical state and in opposite rotation directions. Each group of slides (5) is provided with a threaded sleeve (18), and the two threaded sleeves (18) are respectively threadedly engaged with the two threaded portions on the threaded rod (16).

3. A new material cylinder head sealing performance rheological testing device according to claim 2, characterized in that: Each group of guide seats includes two symmetrical strip seats (19), each strip seat (19) is horizontally fixed to the top of the support plate (15), and each strip seat (19) is provided with a horizontal slide groove (20). Each group of slide seats (5) includes a slide (21) and a flat plate (22), the slide (21) is L-shaped, and two symmetrical sliders (23) are formed on the horizontal end of the slide (21), each slider (23) slides in the corresponding slide groove (20), the flat plate (22) is fixed to the horizontal end of the slide (21), and each threaded sleeve (18) is fixed to the bottom of the flat plate (22).

4. A new material cylinder head sealing performance rheological testing device according to claim 3, characterized in that: Each pressure rod (6) is vertically arranged on the vertical end of the slide (21), and each pressure rod (6) is formed with a plurality of No. 1 limit shafts (24) equidistantly distributed along the length direction of the pressure rod (6), each No. 1 limit shaft (24) is perpendicular to the pressure rod (6), and each No. 1 limit shaft (24) passes through the vertical end of the slide (21), and the No. 1 elastic member includes a plurality of No. 1 springs (25), each No. 1 spring (25) is sleeved on the corresponding No. 1 limit shaft (24), and both ends of each No. 1 spring (25) are respectively in conflict with the vertical ends of the pressure rod (6) and the slide (21), and a No. 1 limit nut (26) is screwed on one end of each No. 1 limit shaft (24) passing through the slide (21).

5. The new material cylinder head sealing performance rheological testing device according to claim 1 is characterized in that: Each edge-sealing shell (7) includes a strip-shaped vertical shell (27) and two strip-shaped end shells (28). The strip-shaped vertical shell (27) is fixedly connected to the corresponding pressure rod (6). The two strip-shaped end shells (28) are respectively formed at the two ends of the strip-shaped vertical shell (27), and each strip-shaped end shell (28) is horizontal. The side of each strip-shaped vertical shell (27) facing the cylinder body (1) is an open structure. The end of each strip-shaped end shell (28) facing the cylinder body (1) is an open structure. The opposite sides of the two strip-shaped end shells (28) are open structures. A plurality of rheological performance sensors (8) are fixed in the strip-shaped vertical shell (27) at equal distances along the length direction of the strip-shaped end shell (28).

6. The new material cylinder head sealing performance rheological testing device according to claim 2 is characterized in that: Each fixed seat (9) is fixed to the top of the support plate (15), and each fixed seat (9) is formed with a plurality of guide shafts (29) distributed equidistantly in the horizontal direction, and each guide shaft (29) is horizontal. The bottom of each sliding seat (10) is fixed with a plurality of guide sleeves (30) corresponding to the guide shafts (29), and each guide sleeve (30) is sleeved on the corresponding guide shaft (29).

7. A new material cylinder head sealing performance rheological testing device according to claim 6, characterized in that: A plurality of No. 2 limiting shafts (31) are formed on each fixed seat (9), each No. 2 limiting shaft (31) is parallel to the corresponding guide shaft (29), and each No. 2 limiting shaft (31) passes through the corresponding push seat (10), and the No. 2 elastic member includes a plurality of No. 2 springs (32) corresponding to the No. 2 limiting shaft (31), each No. 2 spring (32) is sleeved on the No. 2 limiting shaft (31), and each No. 2 spring (32) is respectively in conflict with the fixed seat (9) and the push seat (10), and a No. 2 limiting nut (33) is screwed on one end of each No. 2 limiting shaft (31) passing through the push seat (10).

8. The new material cylinder head sealing performance rheological testing device according to claim 2 is characterized in that: The driving member includes a lifting frame (34), a first contact member and a second contact member, the lifting frame (34) is arranged above the positioning platform (3), the first contact member includes a first lower pressure strip (35) and a first inclined wedge block (36), the first lower pressure strip (35) is vertically fixed to the bottom of the lifting frame (34), the first inclined wedge block (36) is fixedly connected to the first end cover (11), and the lower end of the first lower pressure strip (35) is provided with a first inclined surface (37) that is wedge-matched with the first inclined wedge block (36), and the second contact member includes a second lower pressure strip (38) and a second inclined wedge block (39), the second lower pressure strip (38) is vertically fixed to the bottom of the lifting frame (34), the second inclined wedge block (39) is fixedly connected to the second end cover (12), and the lower end of the second lower pressure strip (38) is provided with a second inclined surface (40) that is wedge-matched with the second inclined wedge block (39).

9. The new material cylinder head sealing performance rheological testing device according to claim 8, characterized in that: One end of the threaded rod (16) is coaxially connected to a gear (41), and a strip guide seat (42) is provided on the side of the gear (41) and is fixedly connected to the top of the support plate (15). A rack (44) that slides in a vertical direction is provided in the strip guide seat (42), and the rack (44) is meshed with the gear (41). The top of the rack (44) is fixedly connected to the bottom of the lifting frame (34), and an avoidance opening (43) for the rack (44) to pass through is opened on the support plate (15).

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