Performance testing device for screw of bulking machine

Abstract

The invention relates to the field of bulking machine testing equipment, in particular to a bulking machine screw performance testing device which comprises a base plate, a clamp used for driving a screw to rotate is arranged on the base plate, a sliding frame is arranged on the base plate in a left-right sliding mode, a detection mechanism is arranged on the sliding frame, and the device further comprises a simulation mechanism used for simulating real working conditions. According to the invention, the linkage cylinder is rotatably connected with the screw rod by adopting the locking assembly, and the displacement amount of the linkage cylinder is monitored in real time by the distance sensor on the sliding frame by utilizing the vibration characteristic that the linkage cylinder rotates along with the screw rod when the coaxiality is poor, so that the coaxiality deviation of the screw rod is accurately judged, and the axis deviation can be directly captured under a dynamic condition; the linkage assembly is adopted to control the centrifugal block to dynamically simulate a material bias structure, the linkage assembly controls the centrifugal block to extend out when rotating to the lower part of the screw rod through the magnetic ring, and the load condition when the material is stacked and biased at the lower part of the screw rod is simulated by utilizing centrifugal force.

Description

Technical Field

[0001] The present invention relates to the field of puffing machine testing equipment, and specifically to a device for testing the performance of the screw of a puffing machine. Background Art

[0002] As a key equipment for material processing in the food, feed, and chemical industries, the core function of a puffing machine is to make materials expand and form through high temperature and high pressure. The screw, as the core component of the puffing machine, is usually composed of a spiral blade and a shaft body, and is responsible for the transportation, extrusion, and shearing of materials. The structural accuracy of the screw directly affects the working efficiency and product quality of the puffing machine. Among them, coaxiality is an important indicator to measure its performance. If the coaxiality of the screw is insufficient, it will affect the equipment life and production safety. Therefore, accurately detecting the coaxiality of the screw is a necessary prerequisite for ensuring the efficient and stable operation of the puffing machine.

[0003] Currently, most of the screw coaxiality detection methods on the market adopt rotational testing. Specifically, the two ends of the screw are fixed by a fixture, driven to rotate, and the radial runout is measured by a displacement sensor or a laser rangefinder to indirectly evaluate the coaxiality. However, the detection process only targets the performance of the screw in the idling state and does not consider the influence of complex loads in actual working conditions on the coaxiality.

[0004] The main shortcoming of the existing detection methods is that they cannot simulate the dynamic load conditions in the real production environment. For example, when the material gets stuck, the screw locally bears an asymmetric resistance, resulting in an increased offset of the axis. However, the traditional detection device cannot reproduce such instantaneous impacts. In addition, the offset of material transportation will form an uneven radial load, further affecting the coaxiality stability, but the existing technology lacks the ability to simulate such offset working conditions.

[0005] The above problems make the detection results significantly different from the actual operating performance, and it is difficult to comprehensively evaluate the applicability and reliability of the screw. Therefore, there is an urgent need for a detection device that can simulate the real working conditions to more accurately reflect the coaxiality performance of the screw under complex loads. Summary of the Invention

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for testing the performance of the screw of a puffing machine, including a base plate, a fixture for driving the screw to rotate is arranged on the base plate, a sliding frame is slidably arranged left and right on the base plate, a detection mechanism for detecting the coaxiality of the screw is arranged on the sliding frame, and the device further includes a simulation mechanism for simulating the real working conditions.

[0007] The detection mechanism includes two symmetrically arranged sliding members that slide up and down on the sliding frame. A linkage cylinder is slidably arranged back and forth between the two sliding members. A locking component for locking the screw is arranged inside the linkage cylinder. Distance sensors are fixedly installed on the upper side of the front end of the sliding frame and the front side of the front sliding member.

[0008] The simulation mechanism includes a rotating ring rotatably arranged outside the linkage cylinder. An insertion rod for inserting between the spiral blades of the screw is arranged on the rotating ring through a triggering component. The simulation mechanism also includes three centrifugal blocks arranged through a linkage component.

[0009] Preferably, spiral springs are arranged between the upper and lower sides of the sliding member and the sliding frame, and between the front and rear sides of the linkage cylinder and the corresponding sliding member.

[0010] Preferably, the locking component includes a rotating member rotatably arranged inside the linkage cylinder. A number of abutting blocks that slide radially along the circumferential direction are arranged at equal intervals inside the rotating member.

[0011] Preferably, a face thread plate is rotatably arranged on the left side of the linkage cylinder. The face thread plate is threadedly connected to the abutting blocks, and two fastening screws are symmetrically arranged on the face thread plate.

[0012] Preferably, the linkage component includes a connecting cylinder fixedly installed on the right side of the rotating member. The three centrifugal blocks are slidably connected to it at equal intervals along the circumferential direction of the connecting cylinder. A magnetic ring slides left and right inside the linkage cylinder, and an arc-shaped groove is provided on the magnetic ring.

[0013] Preferably, the included angles between several of the centrifugal blocks and the radial direction of the connecting cylinder are different. A hydraulic push rod is fixedly installed on the lower side of the linkage cylinder, and the telescopic section of the hydraulic push rod is fixedly connected to the magnetic ring.

[0014] Preferably, the triggering component includes a moving member that slides left and right on the rotating ring. A pushing spring is arranged between the moving member and the rotating ring. The right part of the moving member is slidably connected to the upper and lower sides of the insertion rod. A connecting plate slides radially on the rotating ring. A sloping plate is fixedly installed on the right part of the connecting plate, and the slope of the sloping plate is slidably connected to the upper side of the insertion rod.

[0015] Preferably, a compression spring is arranged between the connecting plate and the rotating ring. A buckling member slides left and right on the rotating ring. A slope is arranged on the left side of the buckling member. A cylinder is fixedly installed on the left side of the connecting plate, and a wedge-shaped block is fixedly installed on the telescopic section of the cylinder.

[0016] Preferably, a locking block slides radially on the rotating ring. The locking block is fixedly connected to the rotating ring through a bolt. Slots for inserting the locking block are arranged at equal intervals along the circumferential direction on the right side of the linkage cylinder.

[0017] Preferably, an adjusting screw rod is rotatably arranged inside the base plate, and the adjusting screw rod is threadedly connected to the sliding frame.

[0018] The beneficial effects of the present invention are as follows: First, the present invention uses a locking component to rotatably connect the linkage cylinder and the screw rod, and utilizes the vibration characteristics of the screw rod when the linkage cylinder rotates with the coaxiality difference. The displacement of the linkage cylinder is monitored in real time by the distance sensor on the sliding frame, so as to accurately judge the coaxiality deviation of the screw rod, and it can directly capture the axis offset under dynamic conditions, significantly improving the detection sensitivity.

[0019] Second, the present invention drives the insertion rod to insert between the spiral blades of the screw rod through the triggering component, forcing the screw rod to stop running, simulating the impact when the material is stuck. At the same time, the insertion rod cooperates with the inclined surface of the inclined panel to push the screw rod along the radial direction of the screw rod, reproducing the extrusion effect of the stuck material on the screw rod, so as to detect the influence of the material stuck on the coaxiality of the screw rod.

[0020] Third, the present invention uses a linkage component to control the centrifugal block to dynamically simulate the material offset structure. The linkage component controls the centrifugal block to extend when it rotates to the lower part of the screw rod through the magnetic ring, and uses the centrifugal force to simulate the load condition when the material accumulates and offsets at the lower part of the screw rod. And by sliding the magnetic ring, different centrifugal blocks can be selected to extend, so as to generate a differential centrifugal force distribution, further simulating the axial pressure caused by the material offset, and comprehensively evaluating the coaxiality stability of the screw rod under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 is the overall structural schematic diagram of the present invention.

[0023] Figure 2 is the structural schematic diagram of the sliding frame, linkage cylinder, connecting plate and end face thread plate in the present invention.

[0024] Figure 3 is the cross-sectional view of the linkage cylinder, rotating part, abutting block and end face thread plate in the present invention.

[0025] Figure 4 is the cross-sectional view of the linkage cylinder, connecting cylinder, rotating part and magnetic ring in the present invention.

[0026] Figure 5 is the cross-sectional view of the centrifugal block and the connecting cylinder in the present invention.

[0027] Figure 6 is the partial structural schematic diagram of the linkage cylinder, rotating ring, moving part and inclined panel in the present invention.

[0028] Figure 7 is the partial cross-sectional view of the rotating ring, buckle part, cylinder and wedge block in the present invention.

[0029] In the figure: 1. Base plate; 2. Fixture; 3. Sliding frame; 4. Detection mechanism; 5. Simulation mechanism; 41. Sliding member; 42. Linking cylinder; 43. Locking assembly; 44. Distance sensor; 45. Adjusting screw; 51. Rotating ring; 52. Trigger assembly; 53. Insertion rod; 54. Linking assembly; 55. Centrifugal block; 431. Rotating part; 432. Resting block; 433. End face threaded disc; 511. Locking block; 521. Moving part; 522. Connecting plate; 523. Inclined panel; 524. Buckling part; 525. Cylinder; 526. Wedge block; 541. Connecting cylinder; 542. Magnetic ring; 543. Hydraulic push rod. Specific embodiments

[0030] The embodiments of the present invention will be described in detail below. The embodiments described below are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention. For those not specified in the embodiments regarding specific technologies or conditions, they shall be carried out according to the technologies or conditions described in the literature in this field or according to the product specifications.

[0031] Refer to Figure 1 and Figure 2 , an extruder screw performance testing device, including a base plate 1, on which there is a fixture 2 for driving the screw to rotate, a sliding frame 3 is slidably arranged left and right on the base plate 1, and a detection mechanism 4 for detecting the coaxiality of the screw is arranged on the sliding frame 3. The device also includes a simulation mechanism 5 for simulating real working conditions.

[0032] It should be noted that the fixture 2 includes two supports arranged on the base plate 1. The support on the right is fixedly connected to the base plate 1, and the support on the left is slidably connected to the base plate 1 left and right. A three-jaw chuck is rotatably arranged on the side of the supports close to each other. An asynchronous motor is fixedly installed on the right side surface of the right support, and the output shaft of the asynchronous motor is fixedly connected to the three-jaw chuck at the corresponding position. The support on the left is driven to slide left and right on the base plate 1 by an existing slide rail power assembly.

[0033] When it is necessary to test the coaxiality of the screw, first adjust the position of the left support left and right according to the length of the screw, then place the screw between the two supports, and at the same time make the screw pass through the detection mechanism 4. Then clamp the two ends of the screw by the three-jaw chuck on the support. After that, start the asynchronous motor to drive the screw to rotate to the working speed through the three-jaw chuck, and monitor the vibration condition of the screw in real time through the detection mechanism 4. Then, simulate the influence on the coaxiality of the screw caused by material jamming and material offset on the screw through the simulation mechanism 5.

[0034] Continue to refer to Figure 1 and Figure 2, the detection mechanism 4 includes two symmetrically arranged sliding members 41 that are vertically slidably arranged on the sliding frame 3. A linkage cylinder 42 is slidably arranged between the two sliding members 41 in the front-back direction. A locking assembly 43 for locking the screw is arranged inside the linkage cylinder 42. A distance sensor 44 is fixedly installed on the upper side of the front end of the sliding frame 3 and the front side of the front sliding member 41.

[0035] Continue to refer to Figure 1 and Figure 2 , spiral springs are arranged between the upper and lower sides of the sliding member 41 and the sliding frame 3, and between the front and rear sides of the linkage cylinder 42 and the corresponding sliding member 41. An adjusting screw 45 is rotatably arranged inside the base plate 1, and the adjusting screw 45 is threadedly connected to the sliding frame 3.

[0036] When the screw is fixedly connected between the two supports, the screw passes through the inside of the linkage cylinder 42. Then the operator manually rotates the adjusting screw 45, so that the adjusting screw 45 drives the linkage cylinder 42 to slide left and right to the middle position of the screw through the sliding frame 3, so as to facilitate the measurement of the coaxiality of the middle position of the screw.

[0037] In the initial state, the spiral springs on the upper and lower sides of the sliding member 41 push the sliding member 41 to be located in the middle position of the sliding frame 3 by their elastic forces. The spiral springs on the front and rear sides of the linkage cylinder 42 push the linkage cylinder 42 to be located in the middle position between the two sliding members 41 by their elastic forces, so that the linkage cylinder 42 is located on the same axis as the three-jaw chuck, and further makes the linkage cylinder 42 and the screw arranged coaxially.

[0038] Refer to Figure 1 , Figure 2 and Figure 3 , the locking assembly 43 includes a rotating member 431 rotatably arranged inside the linkage cylinder 42. A plurality of abutting blocks 432 that slide radially along the rotating member 431 are arranged at equal intervals along the circumferential direction inside the rotating member 431. An end face threaded disc 433 is rotatably arranged on the left side of the linkage cylinder 42. The end face threaded disc 433 is threadedly connected to the abutting blocks 432. Two locking screws are symmetrically arranged on the end face threaded disc 433.

[0039] When the linkage cylinder 42 and the screw are arranged coaxially, the screw penetrates into the inside of the rotating member 431 and is in its coaxial position. Then the operator manually rotates the end face threaded disc 433, so that the end face threaded disc 433 rotates relative to the rotating member 431, so that the end face threaded disc 433 drives the abutting blocks 432 to move synchronously towards the direction close to the axis of the rotating member 431, and further makes the abutting blocks 432 abut and clamp on the outside of the screw, fixedly connecting the rotating member 431 and the screw together. Then the operator manually rotates the two locking screws, so that the locking screws lock the end face threaded disc 433 and the rotating member 431 into a whole.

[0040] In this embodiment, as Figure 3 shown in Figure 4 , a plurality of jacks are equidistantly arranged along the circumferential direction on the outer side surface of the rotating member 431, and arc grooves penetrating through its inner and outer walls are formed at positions corresponding to the jacks on the linkage cylinder 42. When the operator rotates the end face threaded disc 433, the operator holds the insertion rod and inserts it through the arc groove into the jack at the corresponding position, so as to limit the relative rotation angle between the rotating member 431 and the linkage cylinder 42, facilitating the end face threaded disc 433 to drive the abutting block 432 to move.

[0041] When the abutting block 432 abuts and clamps on the outer side of the screw rod, the operator starts the asynchronous motor to drive the screw rod to rotate. The screw rod drives the rotating member 431 to rotate synchronously through the abutting block 432, so that the vibration during the rotation of the screw rod is transmitted to the linkage cylinder 42 through the rotating member 431, causing the linkage cylinder 42 to generate a displacement along the radial direction of the screw rod. At the same time, the linkage cylinder 42 drives the two sliding members 41 to generate up and down displacements.

[0042] Meanwhile, the front and rear displacement amount of the linkage cylinder 42 and the up and down displacement amount of the rotating member 431 are monitored in real time through the distance sensor 44. When the monitoring value of any one of the distance sensors 44 exceeds the standard value, it is determined that the coaxiality is unqualified.

[0043] Referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 , the simulation mechanism 5 includes a rotating ring 51 rotatably arranged outside the linkage cylinder 42. An insertion rod 53 for inserting between the spiral blades of the screw rod is arranged on the rotating ring 51 through a trigger assembly 52. The simulation mechanism 5 further includes three centrifugal blocks 55 arranged through a linkage assembly 54.

[0044] Referring to Figure 1 , Figure 3 , Figure 4 and Figure 5 , the linkage assembly 54 includes a connecting cylinder 541 fixedly installed on the right side of the rotating member 431. The three centrifugal blocks 55 are slidably connected to the connecting cylinder 541 along the circumferential direction thereof at equal intervals. A magnetic ring 542 is slidably arranged left and right inside the linkage cylinder 42. An arc groove is formed on the magnetic ring 542, and the arc groove is located at the lower position of the magnetic ring 542 itself.

[0045] Continuing to refer to Figure 3 , Figure 4 and Figure 5 , the angles between the three centrifugal blocks 55 and the radial direction of the connecting cylinder 541 are different. A hydraulic push rod 543 is fixedly installed on the lower side of the linkage cylinder 42, and the telescopic section of the hydraulic push rod 543 is fixedly connected to the magnetic ring 542.

[0046] It should be noted that five groups of strong magnets are arranged at equal intervals along the axial direction on the inner side of the magnetic ring 542. Each group consists of several strong magnets arranged along its circumferential direction. The strong magnets within each group are closely arranged with each other, and no strong magnets are provided at the position of the arc-shaped groove. Except for the group of strong magnets in the middle, the other four groups of strong magnets are arranged on both sides of the arc-shaped groove. The strong magnets are not shown in the figure.

[0047] It should be noted that in the initial state, the three centrifugal blocks 55 are all completely retracted inside the connecting cylinder 541, and the three centrifugal blocks 55 are completely fitted with the connecting cylinder 541, so that the centrifugal force at each position is the same when the connecting cylinder 541 rotates at this time. The three centrifugal blocks 55 are distributed in sequence from left to right. The centrifugal block 55 on the right is gradually inclined to the right from inside to outside, the centrifugal block 55 on the left is gradually inclined to the left from inside to outside, and the centrifugal block 55 in the middle is arranged along the radial direction of the connecting cylinder 541.

[0048] In the initial state, a group of strong magnets in the middle corresponds to the position of the middle centrifugal block 55. When the screw starts to rotate, the rotating part 431 drives the three centrifugal blocks 55 to rotate synchronously through the connecting cylinder 541. The left and right centrifugal blocks 55 are still in the state of being retracted inside the connecting cylinder 541 under the push of a group of strong magnets at the corresponding positions.

[0049] When the middle centrifugal block 55 rotates to the position of the arc-shaped groove of the magnetic ring 542, since there is no strong magnet on the arc-shaped groove to push the middle centrifugal block 55, the middle centrifugal block 55 extends to the outside of the connecting cylinder 541 under the action of centrifugal force and its own gravity, and at this time the centrifugal block 55 is still inside the magnetic ring 542. Thus, the offset material is simulated by the additionally extended centrifugal block 55, and the coaxiality of the screw is tested under the condition of material offset.

[0050] When the middle centrifugal block 55 rotates to a position not corresponding to the arc-shaped groove, the strong magnet pushes the middle centrifugal block 55 to retract inside the connecting cylinder 541, thereby intermittently simulating the state where the offset direction of the material is downward, effectively conforming to the working condition that the material accumulates at the lower part of the screw under the action of gravity during actual use.

[0051] Subsequently, the telescopic section of the telescopic adjusting hydraulic push rod 543 is adjusted, so that the hydraulic push rod 543 drives the magnetic ring 542 to move left and right, so that the arc-shaped groove on the magnetic ring 542 corresponds to different centrifugal blocks 55. When the arc-shaped groove corresponds to the inclined centrifugal block 55, the principle is the same as above. When the inclined centrifugal block 55 extends, the component force of its centrifugal force causes pressure on the axial direction of the screw, further simulating the complex working condition of axial pressure caused by material offset, and comprehensively evaluating the coaxiality stability of the screw under complex working conditions. By setting five groups of strong magnets, it is ensured that no matter whether the centrifugal block 55 in the middle, on the left or on the right corresponds to the arc-shaped groove, there are corresponding strong magnets acting on the centrifugal block 55.

[0052] Refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 7 ,The trigger assembly 52 includes a moving member 521 that is slidably disposed left and right on the rotating ring 51. A pushing spring is disposed between the moving member 521 and the rotating ring 51. The right part of the moving member 521 is slidably connected up and down with an insertion rod 53. A connecting plate 522 is slidably disposed along the radial direction of the rotating ring 51. A bevel panel 523 is fixedly installed on the right part of the connecting plate 522. The inclined surface of the bevel panel 523 is slidably connected with the upper side of the insertion rod 53.

[0053] Refer to Figure 6 and Figure 7 ,A compression spring is disposed between the connecting plate 522 and the rotating ring 51. A buckle member 524 is slidably disposed left and right on the rotating ring 51. A bevel surface is disposed on the left side of the buckle member 524. A cylinder 525 is fixedly installed on the left side of the connecting plate 522. A wedge block 526 is fixedly installed on the telescopic section of the cylinder 525. A tension spring is disposed between the buckle member 524 and the rotating ring 51.

[0054] In the initial state, the pushing spring pushes the moving member 521 to the left through its own elastic force, so that the moving member 521 drives the insertion rod 53 to be located close to the rotating ring 51. The upper end of the insertion rod 53 is located at the left part of the bevel panel 523. The telescopic section of the cylinder 525 is in the extended state, so that the cylinder 525 drives the wedge block 526 to abut downward against the bevel surface of the buckle member 524. Thus, the wedge block 526 pushes the buckle member 524 to the right and stretches the tension spring. At the same time, the reaction force of the buckle member 524 on the cylinder 525 pushes the connecting plate 522 away from the rotating ring 51.

[0055] When it is necessary to simulate the material jamming in the screw, quickly contract the telescopic section of the cylinder 525, so that the wedge block 526 no longer supports the buckle member 524. While the tension spring pulls the buckle member 524 to the left through its own elastic force, the compression spring pushes the connecting plate 522 toward the axis of the rotating ring 51, so that the connecting plate 522 pushes the insertion rod 53 downward through the bevel panel 523. Thus, the insertion rod 53 is inserted downward between the helical blades of the screw.

[0056] If the insertion rod 53 does not directly abut between the helical blades but abuts against the side wall of the helical blade, when the rotating screw drives its helical blade to rotate until it is not in contact with the insertion rod 53, the insertion rod 53 can still be inserted downward between the helical blades of the screw. Subsequently, the buckle member 524 fixedly connects the connecting plate 522 and the rotating ring 51 together. After that, the helical blade of the screw pushes the insertion rod 53 to move to the right. The insertion rod 53 drives the moving member 521 to move synchronously and quickly compresses the pushing spring.

[0057] By promoting the rapid compression of the spring to simulate the rapid jamming of the material, and when the screw rod pushes the insertion rod 53 to the right, the insertion rod 53 moves along the inclined panel 523 towards the direction close to the axis of the screw rod. When the insertion rod 53 abuts against the screw rod, the insertion rod 53 can no longer move, causing the insertion rod 53 to block the spiral blade of the screw rod, thereby stopping the screw rod, and further simulating the situation where the screw rod stops rotating due to material jamming. At the same time, the screw rod is pushed radially along the screw rod to reproduce the extrusion effect of the material jamming on the screw rod, so as to detect the influence on the coaxiality of the screw rod when the material jams.

[0058] Subsequently, extend the telescopic section of the air cylinder 525, so that the wedge block 526 pushes the buckle member 524 to the right, causing the connecting plate 522 and the rotating ring 51 to no longer be fixedly connected together. Subsequently, the air cylinder 525 drives the connecting plate 522 to move back to the initial position by pushing the buckle member 524 in the reverse direction, causing the insertion rod 53 to also move to the initial position. Subsequently, rotate the screw rod again and conduct multiple material jamming tests on the screw rod.

[0059] Refer to Figure 6 , a locking block 511 is slidably arranged on the rotating ring 51 along its radial direction. The locking block 511 is fixedly connected to the rotating ring 51 through a bolt. A plurality of slots for the locking block 511 to insert are arranged at equal intervals along the circumferential direction on the right side of the linkage cylinder 42.

[0060] The operator can pre-select the pushing direction of the insertion rod 53 on the screw rod by pre-rotating the rotating ring 51 in advance, inserting the locking block 511 into the corresponding slot, and then fixedly connecting the locking block 511 to the rotating ring 51 through a bolt, so as to simulate different jamming positions of the material in the screw rod, and then conduct multiple tests. Whether the monitoring value of the distance sensor 44 (this is prior art and will not be specifically introduced here) exceeds the standard value is used to judge whether the coaxiality is qualified.

[0061] When the present invention conducts coaxiality testing on the screw rod of the extruder: in the first step, adjust the position of the left support according to the length of the screw rod, and then place the screw rod between the two supports, and clamp both ends of the screw rod through the three-jaw chucks on the supports.

[0062] In the second step, the operator manually rotates the adjusting screw rod 45, so that the adjusting screw rod 45 drives the linkage cylinder 42 to slide left and right to the middle position of the screw rod through the sliding frame 3, so as to facilitate the coaxiality testing of the middle position of the screw rod.

[0063] In the third step, the operator manually rotates the end face thread disc 433, so that the abutting block 432 abuts and clamps on the outside of the screw rod, fixedly connecting the rotating member 431 to the screw rod. Then the operator manually rotates the two fastening screw rods, so that the fastening screw rods lock the end face thread disc 433 and the rotating member 431 into a whole.

[0064] Step 4: The operator starts the asynchronous motor to drive the screw to rotate. The vibration during the rotation of the screw is transmitted to the linkage cylinder 42 through the rotating part 431. The distance sensor 44 is used to monitor the forward and backward displacement of the linkage cylinder 42 and the up and down displacement of the rotating part 431 in real time.

[0065] Step 5: The rotating part 431 drives the three centrifugal blocks 55 to rotate synchronously. When the middle centrifugal block 55 rotates to the position of the arc groove, the middle centrifugal block 55 extends to the outside of the connecting cylinder 541 to simulate the offset material. Under the condition of material offset, the coaxiality of the screw is tested.

[0066] Step 6: The telescopic section of the telescopic hydraulic push rod 543 causes the obliquely arranged centrifugal block 55 to extend, further simulating the complex working condition of axial pressure caused by material offset, and comprehensively evaluating the coaxiality stability of the screw under complex working conditions.

[0067] Step 7: The telescopic section of the fast-retracting cylinder 525 is retracted, causing the insertion rod 53 to be inserted downward between the spiral blades of the screw. The spiral blades of the screw push the insertion rod 53 to move to the right, and the insertion rod 53 quickly compresses the push spring to simulate the rapid jamming of the material.

[0068] Step 8: The insertion rod 53 moves along the inclined panel 523 towards the axis of the screw until it abuts against the screw, causing the insertion rod 53 to stop the screw, thereby simulating the situation where the screw stops rotating due to material jamming. At the same time, the insertion rod 53 pushes the screw radially to reproduce the extrusion effect of the material jamming on the screw, so as to detect the influence of the material jamming on the coaxiality of the screw.

[0069] Step 9: Then, the telescopic section of the cylinder 525 is extended, causing the insertion rod 53 to move to the initial position. Then, the screw is rotated again, and multiple material jamming tests are performed on the screw. When the monitoring value of any one of the distance sensors 44 exceeds the standard value, it is determined that the coaxiality is unqualified.

[0070] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and still be covered by the protection scope of the present invention.

Claims

1. A performance testing device for an extruder screw, comprising a base plate, and a fixture for driving the screw to rotate is arranged on the base plate, characterized in that, A sliding frame is slidably arranged left and right on the base plate, and a detection mechanism for detecting the coaxiality of the screw rod is arranged on the sliding frame. The device further includes a simulation mechanism for simulating real working conditions; The detection mechanism includes two symmetrically arranged sliding parts that slide up and down on the sliding frame. A linkage cylinder is slidably arranged back and forth between the two sliding parts. A locking component for locking the screw rod is arranged inside the linkage cylinder. A distance sensor is fixedly installed on the upper side of the front end of the sliding frame and the front side of the front sliding part; The simulation mechanism includes a rotating ring rotatably arranged outside the linkage cylinder. An insertion rod for inserting between the spiral blades of the screw rod is arranged on the rotating ring through a triggering component. The simulation mechanism further includes three centrifugal blocks arranged through a linkage component.

2. The performance testing device for the extruder screw according to claim 1, wherein Spiral springs are arranged between the upper and lower sides of the sliding part and the sliding frame, and between the front and rear sides of the linkage cylinder and the corresponding sliding parts.

3. The performance testing device for the extruder screw according to claim 1, characterized in that, The locking component includes a rotating part rotatably arranged inside the linkage cylinder. A plurality of abutting blocks that slide radially along the rotating part are arranged at equal intervals along the circumference of the rotating part.

4. The performance testing device for an extruder screw according to claim 3, wherein An end face threaded disc is rotatably arranged on the left side of the linkage cylinder. The end face threaded disc is threadedly connected with the abutting blocks, and two fastening screws are symmetrically arranged on the end face threaded disc.

5. The performance testing device for the extruder screw according to claim 3, wherein, The linkage component includes a connecting cylinder fixedly installed on the right side of the rotating part. The three centrifugal blocks are slidably connected to the connecting cylinder at equal intervals along the circumference of the connecting cylinder. A magnetic ring is slidably arranged left and right inside the linkage cylinder, and an arc-shaped groove is formed on the magnetic ring.

6. The performance testing device for the extruder screw according to claim 5, wherein, The included angles between the plurality of centrifugal blocks and the radial direction of the connecting cylinder are different. A hydraulic push rod is fixedly installed on the lower side of the linkage cylinder, and the telescopic section of the hydraulic push rod is fixedly connected with the magnetic ring.

7. The performance testing device for the extruder screw according to claim 1, characterized in that, The triggering component includes a moving part slidably arranged left and right on the rotating ring. A pushing spring is arranged between the moving part and the rotating ring. The right part of the moving part is slidably connected with the insertion rod up and down. A connecting plate is slidably arranged radially on the rotating ring. A sloping plate is fixedly installed on the right part of the connecting plate, and the slope of the sloping plate is slidably connected with the upper side of the insertion rod.

8. The performance testing device for the extruder screw according to claim 7, characterized in that, A compression spring is arranged between the connecting plate and the rotating ring. A clamping component is slidably arranged left and right on the rotating ring. A slope is arranged on the left side of the clamping component. A cylinder is fixedly installed on the left side of the connecting plate, and a wedge-shaped block is fixedly installed on the telescopic section of the cylinder.

9. The performance testing device for the extruder screw according to claim 1, characterized in that A locking block is slidably arranged radially on the rotating ring. The locking block is fixedly connected with the rotating ring through a bolt. Slots for inserting the locking block are arranged at equal intervals along the circumference on the right side of the linkage cylinder.

10. The performance testing device for the extruder screw according to claim 1, wherein, An adjusting screw rod is rotatably arranged inside the base plate. The adjusting screw rod is threadedly connected with the sliding frame.

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