A novel rheological testing device for cylinder head sealing performance of a new material

Abstract

This invention relates to the field of cylinder testing, specifically to a rheological testing device for the sealing performance of a novel cylinder head material. The device includes a cylinder body, a positioning stage, a positioning clamping assembly, and a combined assembly assembly. The positioning clamping assembly includes a translation drive mechanism and two sets of slides. Each set of slides has two pressure rods, and each pressure rod is connected to its corresponding slide by a first elastic element. Each pressure rod has a sealing shell, and each sealing shell contains several rheological performance sensors. The combined assembly assembly includes two sets of pushing assemblies. Each pushing assembly includes a fixed seat, a pushing seat, and a second elastic element. The two pushing seats each have a first end cap and a second end cap. A drive component is located above the positioning stage. This device uses rheological performance sensors to test the rheological properties of a novel cylinder head sealing material under pressure, including creep properties, stress relaxation, and viscoelastic response.

Description

Technical Field

[0001] This invention relates to the field of new cylinder head material testing, and more specifically to an automatic testing device for testing the rheological properties of new cylinder head sealing materials. Background Technology

[0002] The rheological properties of new materials are a key indicator for evaluating their long-term reliability. By testing parameters such as creep rate, stress relaxation time constant, and dynamic modulus of materials under different temperature and pressure conditions, the performance degradation law of materials under actual working conditions can be predicted, which is of great significance for ensuring the long-term stability of cylinder head sealing systems.

[0003] With the development of new materials technology, cylinder head seals are increasingly using high-performance polymers, rubber composites, and other new materials. The rheological properties of these new materials under high temperature and high pressure environments directly affect the sealing effect of the cylinder head. Traditional rheological property testing cannot accurately assess the rheological characteristics of new materials under actual working conditions, including key parameters such as viscoelasticity, creep properties, and stress relaxation.

[0004] Existing rotary cylinders require rheological performance testing after production, primarily to check for leaks of pressurized media between the cylinder body and cylinder head. Traditional testing methods typically involve immersing the entire rotary cylinder in water and testing its pressure. The presence of bubbles indicates a significant gap between the cylinder body and cylinder head, necessitating secondary processing. Following traditional testing, the cylinder needs to be dried, which is time-consuming and requires equipment investment. If the tested rotary cylinder fails to meet standards, it must be disassembled for further processing, significantly reducing production efficiency. Therefore, it is necessary to provide a new rheological testing device for the sealing performance of cylinder heads made of new materials to address these issues. Summary of the Invention

[0005] Therefore, it is necessary to provide a new rheological testing device for the sealing performance of cylinder heads made of new materials to address the problems of existing technologies.

[0006] To address the problems of existing technologies, the present invention adopts the following technical solution: a rheological testing device for the sealing performance of a new material cylinder head. This device can simulate the actual working environment of a cylinder head and test the rheological characteristics of the new material seal by applying controllable pressure and temperature. Specifically, it includes a cylinder body with a groove at the bottom, a positioning platform, a positioning clamping assembly, and a merging assembly. The positioning platform is rectangular and fixedly installed, with a pin formed on its top that mates with the groove. The positioning clamping assembly includes a translation drive mechanism and two sets of slides. The translation drive mechanism is located below the positioning platform, and the two sets of slides are symmetrically arranged on both sides of the positioning platform. Each set of slides is connected to the translation drive mechanism. The mechanism is interconnected, with two symmetrical pressure rods on each set of slides. Each pressure rod and its corresponding slide are connected by a first elastic element. Each pressure rod is equipped with a sealing shell, and each sealing shell contains several rheological performance sensors. The assembled components include two sets of symmetrically positioned pushing components on the other two sides of the positioning platform. Each pushing component includes a fixed base, a pushing base, and a second elastic element. The pushing base is located on the fixed base, and the second elastic element is located between the pushing base and the fixed base. The two pushing bases are equipped with a first end cap and a second end cap, respectively. The first end cap is equipped with an air inlet and an air outlet. Above the positioning platform is a driving component for synchronously driving the two pushing bases to move in opposite directions.

[0007] Furthermore, a horizontal support plate is provided below 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 sets of guide seats. A through groove is opened at the lower end of the positioning platform. The threaded rod is horizontally rotatably connected to the top of the support plate and passes through the through groove. The two sets of guide seats are located on both sides of the positioning platform, and each set of guide seats is fixedly connected to the top of the support plate. Each set of slides is slidably connected to the corresponding guide seat. The threaded rod is provided with two sets of symmetrical threaded parts with opposite directions of rotation. Each set of slides is provided with a threaded sleeve. The two threaded sleeves are threadedly engaged with the two threaded parts on the threaded rod.

[0008] Furthermore, each set of guide seats includes two symmetrical strip seats, each strip seat is horizontally fixed to the top of the support plate, each strip seat has a horizontal groove, each set of slide seats includes a slide frame and a plate, the slide frame is L-shaped, and two symmetrical sliders are formed on the horizontal end of the slide frame, each slider slides in the corresponding groove, the plate is fixed on the horizontal end of the slide frame, and each threaded sleeve is fixed to the bottom of the plate.

[0009] Furthermore, each pressure rod is vertically mounted on the vertical end of the slide, and each pressure rod has several first-order limiting shafts equidistantly distributed along its length. Each first-order limiting shaft is perpendicular to the pressure rod and passes through the vertical end of the slide. The first elastic element includes several first-order springs, each of which is sleeved on the corresponding first-order limiting shaft. Both ends of each first-order spring abut against the vertical ends of the pressure rod and the slide, respectively. A first-order limiting nut is screwed onto the end of each first-order limiting shaft that passes 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 both 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. 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 equidistantly inside the strip-shaped vertical shell 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 has several guide shafts that are equidistantly distributed in the horizontal direction. Each guide shaft is horizontal, and each push seat has several guide sleeves corresponding to the guide shafts fixed at its bottom. Each guide sleeve is fitted onto the corresponding guide shaft.

[0012] Furthermore, each fixed seat has several second-order limiting shafts formed on it. Each second-order limiting shaft is parallel to the corresponding guide shaft and passes through the corresponding push seat. The second elastic element includes several second-order springs corresponding to the second-order limiting shafts. Each second-order spring is sleeved on the second-order limiting shaft and abuts against both the fixed seat and the push seat. A second-order limiting nut is screwed onto one end of each second-order limiting shaft that passes through the push seat.

[0013] Furthermore, the driving component includes a lifting frame, a first abutment component, and a second abutment component. The lifting frame is located above the positioning platform. The first abutment component includes a first lower pressure bar and a first inclined wedge block. The first lower pressure bar is vertically fixed to the bottom of the lifting frame. The first inclined wedge block is fixedly connected to the first end cap. The lower end of the first lower pressure bar is provided with a first inclined surface that wedges with the first inclined wedge block. The second abutment component includes a second lower pressure bar and a second inclined wedge block. The second lower pressure bar is vertically fixed to the bottom of the lifting frame. The second inclined wedge block is fixedly connected to the second end cap. The lower end of the second lower pressure bar is provided with a second inclined surface that wedges with the second inclined wedge block.

[0014] Furthermore, a gear is coaxially fixed to one end of the threaded rod, and a strip guide seat is fixed to the top of the support plate on the side of the gear. A rack that slides vertically is provided in the strip guide seat, and the rack meshes with the gear. The top of the rack is fixed to the bottom of the lifting frame, and a clearance opening is provided on the support plate for the rack to pass through.

[0015] The beneficial effects of this invention compared to the prior art are:

[0016] Firstly, when this device is used for testing, the product being tested is only the cylinder body, while the two cylinder heads are separately installed on two push seats. During testing, the cylinder body is placed on the positioning platform, and then the cylinder heads are pressed onto the cylinder body by the push seats to merge them. In this way, when the product fails the test, the unqualified product can be processed directly on-site without the need for subsequent disassembly, which greatly improves production efficiency.

[0017] Secondly, the positioning and clamping assembly of this device is used to press the cylinder body into place, ensuring that the position of the cylinder body will not shift. The merging and assembly assembly of this device is used to press the two cylinder heads onto the two ends of the cylinder body respectively. Both the positioning and clamping assembly and the merging and assembly assembly are driven by the lifting frame, thereby reducing the number of drive equipment and thus reducing the cost of drive equipment.

[0018] Third, this device uses a combination of various types of rheological property sensors, which can comprehensively evaluate the viscoelastic characteristics, creep behavior and stress relaxation properties of new materials, providing quantitative scientific basis for the research and development and quality control of new materials. Compared with traditional qualitative detection methods, it has significant technical advantages. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 yes Figure 1 A magnified view of the area indicated by A1 in the diagram;

[0021] Figure 3 yes Figure 1 The enlarged view of the area indicated by A2 in the diagram;

[0022] Figure 4 This is a top view of the present invention;

[0023] Figure 5 yes Figure 4 Sectional view along line AA;

[0024] Figure 6 yes Figure 4 Sectional view along line BB;

[0025] Figure 7 It is an exploded three-dimensional structural diagram of the cylinder block and the positioning platform;

[0026] Figure 8 This is a three-dimensional structural diagram of the translation drive mechanism;

[0027] Figure 9 It is an exploded three-dimensional structural diagram of the bar seat and carriage;

[0028] Figure 10 This is a schematic diagram of the three-dimensional structure of the edge-sealing shell;

[0029] Figure 11 This is a three-dimensional structural diagram of the pushing component;

[0030] Figure 12 This is a schematic diagram of the three-dimensional structure of the No. 1 and No. 2 end caps after they are combined with the cylinder block.

[0031] The following are labeled in the diagram: 1. Cylinder body; 2. Groove; 3. Positioning platform; 4. Pin; 5. Slide; 6. Pressure rod; 7. Sealing shell; 8. Rheological performance sensor; 9. Fixed base; 10. Pushing base; 11. End cap No. 1; 12. End cap No. 2; 13. Inlet nozzle; 14. Outlet nozzle; 15. Support plate; 16. Threaded rod; 17. Through groove; 18. Threaded sleeve; 19. Strip seat; 20. Slide groove; 21. Carriage; 22. Flat plate; 23. Slider; 24. Limiting shaft No. 1 ; 25. Spring No. 1; 26. Limiting Nut No. 1; 27. Strip-shaped Vertical Shell; 28. Strip-shaped End Shell; 29. ​​Guide Shaft; 30. Guide Sleeve; 31. Limiting Shaft No. 2; 32. Spring No. 2; 33. Limiting Nut No. 2; 34. Lifting Frame; 35. Lower Pressure Bar No. 1; 36. Wedge Block No. 1; 37. Inclined Surface No. 1; 38. Lower Pressure Bar No. 2; 39. Wedge Block No. 2; 40. Inclined Surface No. 2; 41. Gear; 42. Strip-shaped Guide Seat; 43. Clearance Opening; 44. Rack. Detailed Implementation

[0032] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] refer to Figures 1 to 12 The diagram illustrates a rheological testing device for the sealing performance of a novel material cylinder head. This device simulates the actual working environment of a cylinder head and tests the rheological properties of the novel material seal by applying controllable pressure and temperature. Specifically, it includes a cylinder body 1, with a groove 2 at the bottom of the cylinder body 1 (e.g.,...). Figure 7(As shown), it also includes a positioning platform 3, a positioning clamping assembly, and a combined assembly assembly. The positioning platform 3 is rectangular and fixedly installed. The top of the positioning platform 3 is formed with a pin 4 that mates with the groove 2. The positioning clamping assembly includes a translation drive mechanism and two sets of slides 5. The translation drive mechanism is located below the positioning platform 3. The two sets of slides 5 are symmetrically arranged on one side of the positioning platform 3. Each set of slides 5 is connected to the translation drive mechanism. Each set of slides 5 is provided with two symmetrically arranged pressure rods 6. Each pressure rod 6 is provided with a first elastic element between it and the corresponding slide 5. Each pressure rod 6 is provided with a sealing shell 7. Each sealing shell 7 contains several rheological performance sensors 8. The combined assembly assembly includes two sets of symmetrically arranged pushing assemblies on the other two sides of the positioning platform 3. Each pushing assembly includes a fixed seat 9, a pushing seat 10, and a second elastic element. The pushing seat 10 is located on the fixed seat 9 (e.g., Figure 3 As shown), the second elastic element is located between the push seat 10 and the fixed seat 9. The two push seats 10 are respectively provided with a first end cap 11 and a second end cap 12. The first end cap 11 is provided with an air inlet 13 and an air outlet 14. Above the positioning platform 3 is a drive element for synchronously driving the two push seats 10 to move towards each other.

[0034] This device is used to test the rheological properties of a new material for rotary cylinder sealing. The cylinder body 1, end cap 11, and end cap 12 of this device are all existing technologies. Each of these components has an internal air passage for the flow of pressure medium. During rheological property testing, the horizontal cylinder body 1 is placed downwards on the positioning platform 3. During this process, the pin 4 at the top of the positioning platform 3 inserts upwards into the groove 2 at the bottom of the cylinder body 1. The engagement of the pin 4 and the groove 2 prevents the cylinder body 1 from shifting left or right on the positioning platform 3, but the cylinder body 1 can still rotate. Then, the translation drive mechanism drives two sets of slides 5 to move closer together. The slides 5 drive the corresponding pressure rods 6 to press against the outer wall of the cylinder body 1. Finally, the pressure rods 6 on the two sets of slides 5 straighten the cylinder body 1. When the pressure rods 6 press against the outer wall of the cylinder body 1, each sealing shell 7 on the pressure rod 6 will fit against the outer wall of the cylinder body 1, and each... The edge sealing shells 7 correspond to the end edges of one end of the cylinder body 1. When the cylinder body 1 is pressed into place, the driving component drives the two push seats 10 to move closer to each other. During this process, the two push seats 10 will respectively drive the first end cover 11 and the second end cover 12 to press against the two ends of the cylinder body 1. Finally, the first end cover 11 and the second end cover 12 will be tightly pressed against the two ends of the cylinder body 1. After the first end cover 11 and the second end cover 12 are pressed against the two ends of the cylinder body 1, the space between the first end cover 11 and the cylinder body 1 and the second end cover 12 will be closed. A connecting seam is formed between the seal 12 and the cylinder 1. At this time, the two corresponding sealing shells 7 will merge towards each other to cover the corresponding connecting seam. Then, a pressure medium is injected into the cylinder 1 through the air inlet 13. The pressure medium will pass through the first end cap 11, the cylinder 1, and the second end cap 12 in sequence, and finally be discharged from the air outlet 14. During this process, when the first end cap 11 and the second end cap 12 are pressed against the two ends of the cylinder 1, the new material seal will deform under pressure. At this time, the rheological performance sensor 8 (including strain sensor, displacement sensor, and pressure sensor) in the sealing shell 7 begins to monitor the rheological response of the new material in real time (such as strain sensor, displacement sensor, etc.), which 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 contain the following types of sensor combinations: strain sensor, displacement sensor, and pressure sensor. These sensors work together to monitor the rheological response of the new material seal in real time during the test.

[0035] When end cap 11 and end cap 12 are pressed against the two ends of cylinder 1, the new material seals placed on the mating surfaces are subjected to pressure. At this time, the rheological property sensor 8 starts to work:

[0036] First, a pressure sensor measures the actual pressure applied to the new material, ensuring the accuracy of the 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.

[0037] Instead of a simple pressure medium, a controllable hydraulic medium or air pressure is applied through the air inlet 13 to apply constant or cyclically varying loads to the new material. This loading method can simulate the pressure cycles of a cylinder head during actual operation, and test the creep characteristics, stress relaxation behavior, and fatigue performance of the new material.

[0038] At the same time, each push seat 10 is reset by the second elastic element, so that the pressure rod 6, the first end cover 11 and the second end cover 12 will be separated from the cylinder body 1 in a synchronized manner, and finally the cylinder body 1 can be removed from the positioning table 3.

[0039] The data collected by the rheological property sensor 8 includes: the instantaneous deformation of the material, the stress-strain curve, the change of relaxation modulus over time, and the hysteresis loop under cyclic loading. These data are recorded by a high-frequency acquisition system and can accurately reflect the viscoelastic characteristics of the new material.

[0040] During testing, if the material's rheological properties do not meet requirements, such as excessive creep rate or rapid stress relaxation, the sensor will immediately detect abnormal data. The system will determine whether the material is qualified based on preset rheological performance standards, which reflects the material's long-term performance better than traditional rheological performance testing.

[0041] The entire testing process remains automated, but the focus shifts from simple sealing performance to the intrinsic properties of the material. Once cylinder 1 is positioned, the system performs multi-stage testing according to a preset test program: the pre-loading stage tests the material's initial response, the constant load stage tests creep performance, the unloading stage tests elastic recovery capability, and the cyclic loading stage tests fatigue characteristics.

[0042] Multiple rheological property sensors 8 within each sealing shell 7 are uniformly distributed along the sealing surface, enabling the acquisition of spatial distribution characteristics of the material's rheological properties. This is of great significance for evaluating the uniformity and anisotropy of new materials.

[0043] Through this technological upgrade, the device can not only detect the immediate sealing effect of the cylinder head, but more importantly, it can predict the performance changes of new material seals during long-term use, providing a scientific basis for the research and application of new materials. This shift from superficial detection to essential testing fully demonstrates the technological advancement of this device in the field of new material testing.

[0044] To demonstrate the specific structure of the translation drive mechanism, the following features are provided:

[0045] A horizontal support plate 15 is provided below the positioning platform 3. 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 sets of guide seats. A through groove 17 is provided at the lower end of the positioning platform 3. The threaded rod 16 is horizontally rotatably connected to the top of the support plate 15 and passes through the through groove 17. The two sets of guide seats are located on both sides of the positioning platform 3, and each set of guide seats is fixedly connected to the top of the support plate 15. Each set of slides 5 is slidably connected to the corresponding guide seat. The threaded rod 16 is provided with two sets of symmetrical threaded parts with opposite directions of rotation. Each set of slides 5 is provided with a threaded sleeve 18. The two threaded sleeves 18 are threadedly engaged with the two threaded parts on the threaded rod 16.

[0046] When the threaded rod 16 rotates, it drives the threaded sleeve 18 to rotate. However, since the slide block 5 is slidably connected to the guide seat, the slide block 5 is restricted from rotating. Eventually, the slide block 5 will translate along the axial direction of the threaded rod 16. Since the two threads on the threaded rod 16 rotate in opposite directions, the two slide blocks 5 will move towards or away from each other. When the two slide blocks 5 move towards each other, each slide block 5 will drive the corresponding two pressure rods 6 to press against the outer wall of the cylinder body 1. Finally, the cylinder body 1 on the positioning table 3 is pressed upright by the pair of pressure rods 6 on each slide block 5. When the two slide blocks 5 move away from each other, each pressure rod 6 will separate from the cylinder body 1, so that the cylinder body 1 can be removed from the positioning table 3.

[0047] To clearly demonstrate the specific structure of the slide 5 and the guide seat, the following features are provided:

[0048] Each set of guide seats includes two symmetrical strip seats 19, each strip seat 19 being horizontally fixed to the top of the support plate 15. Each strip seat 19 has a horizontal sliding groove 20. Each set of slide seats 5 includes a slide frame 21 and a plate 22. The slide frame 21 is L-shaped, and two symmetrical sliders 23 are formed on the horizontal end of the slide frame 21 (e.g., ...). Figure 9 As shown), each slider 23 slides within its corresponding groove 20, the plate 22 is fixed to the horizontal end of the carriage 21, and each threaded sleeve 18 is fixed to the bottom of the plate 22.

[0049] The slide 21 in the slide block 5 slides on two guide seats via the slider 23 at its bottom. The cooperation between the slider 23 and the slide groove 20 ensures that the entire slide block 5 can only move in the horizontal direction.

[0050] To demonstrate the specific structure of the first elastic element, the following features were set:

[0051] Each pressure rod 6 is vertically mounted on the vertical end of the slide 21. Each pressure rod 6 has several first-order limiting shafts 24 equidistantly distributed along its length. Each first-order limiting shaft 24 is perpendicular to the pressure rod 6 and passes through the vertical end of the slide 21. The first elastic element includes several first-order springs 25. Each first-order spring 25 is sleeved on the corresponding first-order limiting shaft 24. Both ends of each first-order spring 25 abut against the vertical ends of the pressure rod 6 and the slide 21, respectively. A first-order limiting nut 26 is screwed onto the end of each first-order limiting shaft 24 that passes through the slide 21.

[0052] In the initial state, the first spring 25 releases its elastic force to drive the pressure rod 6 to move towards the cylinder 1 until the first limit nut 26 on the first limit shaft 24 abuts against the vertical end of the slide 21. At this time, the first limit nut 26 prevents the first limit shaft 24 from separating from the slide 21. When the slide 5 moves towards the cylinder 1, the pressure rod 6 on the slide 21 will gradually press against the outer wall of the cylinder 1. When the pressure rod 6 abuts against the outer wall of the cylinder 1, the four pressure rods 6 distributed in a matrix will straighten the tilted cylinder 1. As the slide 21 continues to move, each first spring 25 will be compressed by the pressure rod 6 and the slide 21, so that the first spring 25 will generate elastic force, and thus the first spring 25 will ensure that the pressure rod 6 can abut against the outer wall of the cylinder 1.

[0053] To demonstrate the specific structure of the edge-sealing shell 7, the following features are provided:

[0054] 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. 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 equidistantly fixed inside the strip-shaped vertical shell 27 along the length direction of the strip-shaped end shell 28 (e.g., ...). Figure 10 (As shown).

[0055] When the two sliding blocks 5 move towards each other, each pressure rod 6 will cause the strip-shaped vertical shell 27 to press against the cylinder body 1. Finally, when the pressure rod 6 presses against the outer wall of the cylinder body 1, each strip-shaped vertical shell 27 will be in contact with the outer wall of the cylinder body 1. At this time, the two strip-shaped end shells 28 will be in contact with the top and bottom surfaces of the cylinder body 1, respectively. After the first end cap 11 and the second end cap 12 are pressed against the two ends of the cylinder body 1, each sealing shell 7 will cover the joint area where the new material seal is located (e.g., Figure 2 and Figure 12 As shown in the figure, 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.

[0056] During actual testing, the rheological property sensor 8 monitors the deformation characteristics of the new material seal under pressure in real time. The data collected by the sensor includes: material compression, lateral flow displacement, stress distribution, and relaxation modulus over time. The pressure medium applied through the intake manifold 13 generates a controllable load on the new material, simulating the actual working conditions of the cylinder head, thereby accurately assessing whether the rheological properties of the new material meet the application requirements.

[0057] To demonstrate how the sliding seat 10 is mounted on the fixed seat 9, the following features are provided:

[0058] Each fixed seat 9 is fixed to the top of the support plate 15. Each fixed seat 9 has several guide shafts 29 that are equidistantly distributed in the horizontal direction. Each guide shaft 29 is horizontal. Each push seat 10 has several guide sleeves 30 that correspond to the guide shafts 29 fixed at its bottom. Each guide sleeve 30 is fitted onto the corresponding guide shaft 29.

[0059] The pusher seat 10 slides on the guide shaft 29 via the guide sleeve 30 at its bottom. The cooperation between the guide shaft 29 and the guide sleeve 30 ensures that the pusher seat 10 can only move horizontally. When the drive unit is started, the two pusher seats 10 will respectively drive the first end cover 11 and the second end cover 12 to press against the two ends of the cylinder body 1. Finally, when the first end cover 11 and the second end cover 12 are pressed tightly against the cylinder body 1, the first end cover 11, the second end cover 12 and the cylinder body 1 form a complete rotary cylinder.

[0060] To demonstrate the specific structure of the second elastic element, the following features were designed:

[0061] Each fixed seat 9 has several second-order limiting shafts 31 formed on it. Each second-order limiting shaft 31 is parallel to the corresponding guide shaft 29 and passes through the corresponding push seat 10. The second elastic element includes several second-order springs 32 corresponding to the second-order limiting shafts 31. Each second-order spring 32 is sleeved on the second-order limiting shaft 31 and abuts against the fixed seat 9 and the push seat 10 respectively. A second-order limiting nut 33 is screwed on one end of each second-order limiting shaft 31 that passes through the push seat 10.

[0062] In the initial state, the second spring 32 releases its elastic force to drive the pusher seat 10 to move away from the cylinder 1 until the pusher seat 10 comes into contact with the second limit nut 33. The second limit nut 33 prevents the pusher seat 10 from separating from the second limit shaft 31. When the drive unit is started, the two pushers 10 will press against the two ends of the cylinder 1 respectively. During this process, each pusher seat 10 will compress the second spring 32, thereby causing the second spring 32 to generate elastic force. After the test is completed, the elastic force of the second spring 32 drives the corresponding pusher seat 10 to reset.

[0063] To demonstrate the specific structure of the drive component, the following features were set:

[0064] The driving components include the lifting frame 34, the first abutment component, and the second abutment component (such as...). Figure 5 As shown), the lifting frame 34 is located above the positioning platform 3. The first contact component 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 cap 11. The lower end of the first lower pressure strip 35 is provided with a first inclined surface 37 that wedges with the first inclined wedge block 36. The second contact component 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 cap 12. The lower end of the second lower pressure strip 38 is provided with a second inclined surface 40 that wedges with the second inclined wedge block 39.

[0065] In actual operation, a vertical cylinder (not shown in the figure) is connected above the lifting frame 34. The vertical cylinder drives the lifting frame 34 to rise and fall. When the lifting frame 34 descends, it will simultaneously drive the first lower pressure bar 35 and the second lower pressure bar 38 to descend. Then, the first lower pressure bar 35 will move downward and abut against the first inclined wedge block 36. At this time, through the cooperation of the first inclined surface 37 and the first inclined wedge block 36, the corresponding push seat 10 will be driven to move towards one end of the cylinder body 1. Similarly, when the second lower pressure bar 38 abuts against the second inclined wedge block 39, through the cooperation of the second inclined surface 40 and the second inclined wedge block 39, the corresponding push seat 10 will be driven to move towards the other end of the cylinder body 1. Finally, the two push seats 10 will respectively drive the first end cover 11 and the second end cover 12 to press against the two ends of the cylinder body 1.

[0066] In order to enable synchronous driving of slide 5 and push seat 10, the following features are set:

[0067] One end of the threaded rod 16 is coaxially fixed to a gear 41 (e.g. Figure 8 As shown), 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 is provided in the strip guide seat 42 and slides in the vertical direction. The rack 44 meshes with the gear 41. The top of the rack 44 is fixedly connected to the bottom of the lifting frame 34. An avoidance opening 43 is provided on the support plate 15 for the rack 44 to pass through.

[0068] When the lifting frame 34 descends, it simultaneously drives the first lower pressure bar 35, the second lower pressure bar 38, and the rack 44 to descend. During this process, the rack 44, which meshes with the gear 41, drives the gear 41 to rotate. The gear 41 then drives the threaded rod 16 to rotate, ultimately driving the two slide blocks 5 to move in opposite directions. When the two slide blocks 5 move to the point where the pressure rod 6 abuts against the cylinder 1, the first inclined surface 37 on the first lower pressure bar 35 will engage with the first inclined wedge block 36, and the second inclined surface 40 on the second lower pressure bar 38 will engage with the second inclined wedge block 39. Afterwards... As the lifting frame 34 continues to descend, the pressure rod 6 pressing against the outer wall of the cylinder 1 will compress the first spring 25, and the two sliding seats 10 will be driven to move towards both ends of the cylinder 1. During this process, the first spring 25 not only ensures that the pressure rod 6 can press against the outer wall of the cylinder 1, but also provides the slide seat 5 with a wide capacity to continue moving towards the cylinder 1. Finally, the lifting frame 34 can control the pressure rod 6, the first end cover 11 and the second end cover 12 to press against the cylinder 1, and the pressure rod 6 presses against the cylinder 1 first, and the first end cover 11 and the second end cover 12 press against the cylinder 1 later.

[0069] Working principle:

[0070] This device is used to test the rheological properties of new material seals for rotary cylinders. The cylinder body 1, end cap 11, and end cap 12 of this device are all existing technologies, and each of these components has a channel for the flow of pressure medium. During the rheological performance test, the new material seal to be tested is pre-installed on the mating surfaces at both ends of the cylinder body 1, and then the cylinder body 1 is placed downwards on the positioning platform 3. During this process, the pin 4 located at the top of the positioning platform 3 inserts upwards into the groove 2 at the bottom of the cylinder body 1. The engagement of the pin 4 with the groove 2 prevents the cylinder body 1 from shifting left or right on the positioning platform 3. However, the cylinder body 1 may still rotate slightly at this time.

[0071] Subsequently, the translation drive mechanism drives the two sets of slide blocks 5 to move closer to each other. The slide blocks 5 drive the corresponding pressure rods 6 to press against the outer wall of the cylinder body 1, and finally the cylinder body 1 is straightened by the pressure rods 6 on the two sets of slide blocks 5. When the pressure rods 6 press against the outer wall of the cylinder body 1, each sealing shell 7 provided on the pressure rods 6 will fit against the outer wall of the cylinder body 1, and the rheological performance sensor 8 in each sealing shell 7 will be aligned with the corresponding test area of ​​the new material seal.

[0072] After the cylinder body 1 is positioned, the drive unit drives the two push seats 10 to move closer together. During this process, the two push seats 10 will respectively drive the first end cap 11 and the second end cap 12 to press against both ends of the cylinder body 1. Finally, the first end cap 11 and the second end cap 12 will apply a predetermined clamping force to the new material seal. After the first end cap 11 and the second end cap 12 are clamped, the new material seal between the first end cap 11 and the cylinder body 1, and between the second end cap 12 and the cylinder body 1, begins to deform. At this time, the rheological property sensor 8 inside the sealing shell 7 will monitor the deformation characteristics of the material in real time.

[0073] During the test, a pressure medium is injected into the cylinder 1 through the air inlet 13 to apply a controllable test pressure. The pressure medium passes through end cap 11, cylinder 1, and end cap 12, and is finally discharged from the air outlet 14. Throughout this process, the rheological property 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, relaxation modulus over time, and hysteresis characteristics under cyclic loading.

[0074] If test data shows that the rheological properties of the new material do not meet the preset standards, such as excessive creep rate or excessively rapid stress relaxation, then the material formulation needs to be optimized or the material type changed. The system can evaluate the rheological properties of new material seals with different thicknesses and formulations through multiple tests, providing a scientific basis for product design.

[0075] After the test is completed, the translation drive mechanism drives the two slide blocks 5 to translate in opposite directions. At the same time, each push block 10 is reset by the second elastic element. The pressure rod 6, the first end cap 11 and the second end cap 12 will be separated from the cylinder 1 in a synchronized manner. Finally, the cylinder 1 and the new material sample after the test can be removed from the positioning table 3 for subsequent analysis or to replace with a new test sample for continued testing.

[0076] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A rheological testing device for the sealing performance of a new material cylinder head, the device being able to 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), wherein the bottom of the cylinder body (1) is provided with a groove (2), characterized in that, It also includes a positioning platform (3), a positioning clamping assembly, and a merging assembly assembly. The positioning platform (3) is rectangular and fixedly installed. The top of the positioning platform (3) is formed with a pin (4) that mates with the groove (2). The positioning clamping assembly includes a translation drive mechanism and two sets of slides (5). The translation drive mechanism is located below the positioning platform (3). The two sets of slides (5) are symmetrically located on one side of the positioning platform (3). Each set of slides (5) is connected to the translation drive mechanism. Each set of slides (5) is provided with two symmetrical pressure rods (6). Each pressure rod (6) is provided with an elastic element between it and the corresponding slide (5). Each pressure rod (6) is provided with a sealing shell (7). Each sealing shell (7) is provided with several rheological performance sensors (8). The rheological performance sensors are... The device (8) includes a combination of strain sensor, displacement sensor and pressure sensor, used to monitor the stress-strain relationship, compression deformation and relaxation modulus of the new material seal in real time. The combined assembly includes two sets of push assemblies symmetrically arranged on the other two sides of the positioning platform (3). Each push assembly includes a fixed seat (9), a push seat (10) and a second elastic element. The push seat (10) is located on the fixed seat (9), and the second elastic element is located between the push seat (10) and the fixed seat (9). The two push seats (10) are respectively provided with a first end cap (11) and a second end cap (12). The first end cap (11) is provided with an air inlet (13) and an air outlet (14). Above the positioning platform (3) is a drive element for synchronously driving the two push seats (10) to move towards each other.

2. The rheological testing device for the sealing performance of a new material cylinder head according to claim 1, characterized in that, A horizontal support plate (15) is provided below the positioning platform (3). 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 sets of guide seats. A through groove (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) and passes through the through groove (17). The two sets of guide seats are located on both sides of the positioning platform (3). Each set of guide seats is fixed to the top of the support plate (15). Each set of slides (5) is slidably connected to the corresponding guide seat. The threaded rod (16) has two sets of symmetrical threaded parts with opposite rotation directions. Each set of slides (5) has a threaded sleeve (18). The two threaded sleeves (18) are threadedly engaged with the two threaded parts on the threaded rod (16).

3. The rheological testing device for the sealing performance of a new material cylinder head according to claim 2, characterized in that, 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). Each strip seat (19) has a horizontal groove (20). Each set of slide seats (5) includes a slide frame (21) and a plate (22). The slide frame (21) is L-shaped. Two symmetrical sliders (23) are formed on the horizontal end of the slide frame (21). Each slider (23) slides in the corresponding groove (20). The plate (22) is fixed on the horizontal end of the slide frame (21). Each threaded sleeve (18) is fixed to the bottom of the plate (22).

4. The rheological testing device for the sealing performance of a new material cylinder head according to claim 3, characterized in that, Each pressure rod (6) is vertically mounted on the vertical end of the slide (21). Each pressure rod (6) has several first-order limiting shafts (24) equidistantly distributed along the length of the pressure rod (6). Each first-order limiting shaft (24) is perpendicular to the pressure rod (6) and passes through the vertical end of the slide (21). The first elastic element includes several first-order springs (25). Each first-order spring (25) is sleeved on the corresponding first-order limiting shaft (24). Both ends of each first-order spring (25) abut against the vertical ends of the pressure rod (6) and the slide (21), respectively. Each first-order limiting shaft (24) has a first-order limiting nut (26) screwed on one end of the slide (21).

5. The rheological testing device for the sealing performance of a new material cylinder head according to claim 1, 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 both ends of the strip-shaped vertical shell (27). Each strip-shaped end shell (28) is horizontal. The side of each strip-shaped vertical shell (27) facing the cylinder (1) is an open structure. The end of each strip-shaped end shell (28) facing the cylinder (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 equidistantly inside the strip-shaped vertical shell (27) along the length direction of the strip-shaped end shell (28).

6. The rheological testing device for the sealing performance of a new material cylinder head according to claim 2, characterized in that, Each fixed seat (9) is fixed to the top of the support plate (15). Each fixed seat (9) has several guide shafts (29) that are equidistantly distributed in the horizontal direction. Each guide shaft (29) is horizontal. Each push seat (10) has several guide sleeves (30) that correspond to the guide shafts (29) fixed at its bottom. Each guide sleeve (30) is fitted onto the corresponding guide shaft (29).

7. The rheological testing device for the sealing performance of a new material cylinder head according to claim 6, characterized in that, Each fixed seat (9) has several second-level limiting shafts (31) formed on it. Each second-level limiting shaft (31) is parallel to the corresponding guide shaft (29), and each second-level limiting shaft (31) passes through the corresponding push seat (10). The second elastic element includes several second-level springs (32) corresponding to the second-level limiting shafts (31). Each second-level spring (32) is sleeved on the second-level limiting shaft (31), and each second-level spring (32) abuts against the fixed seat (9) and the push seat (10) respectively. A second-level limiting nut (33) is screwed on one end of each second-level limiting shaft (31) that passes through the push seat (10).

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

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

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