Hot oil pump shaft trajectory detection device

Abstract

This invention relates to the field of hot oil pump testing, and more particularly to a hot oil pump shaft trajectory detection device, comprising a sliding mounting platform. A drive component of the hot oil pump structure is slidably mounted on the right side of the sliding mounting platform, and the pump housing of the hot oil pump structure is mounted on the left side of the sliding mounting platform. The drive component and the pump housing are connected by a shaft. A shaft trajectory detection mechanism is slidably mounted on the sliding mounting platform at the shaft. This invention achieves flexible position adjustment of each component along the shaft axis by mounting the drive component, pump housing, and shaft trajectory detection mechanism onto corresponding sliding mounting plates on the sliding mounting platform. Each sliding mounting plate can slide independently along a guide optical axis and a trapezoidal plate. The guide optical axis and the trapezoidal plate form a double guiding structure, effectively enhancing the stability and anti-overturning ability of the sliding mounting plates during sliding, while ensuring the parallelism and coaxiality between the sliding mounting plates.

Description

Technical Field

[0001] This invention relates to the field of hot oil pump testing, and more particularly to a device for detecting the shaft trajectory of a hot oil pump. Background Technology

[0002] The shaft center trajectory is a crucial characteristic parameter reflecting the operating state of a rotating machinery rotor. Real-time monitoring and analysis of the hot oil pump shaft center trajectory can effectively identify typical faults such as rotor imbalance, shaft misalignment, bearing wear, and oil film whirl. During the shaft center trajectory detection process of a hot oil pump, to accurately diagnose rotor imbalance faults, it is usually necessary to artificially create known imbalance conditions. By comparing the morphological differences of the shaft center trajectory under normal and imbalance conditions, a fault feature database can be established, and the effectiveness of the detection system can be verified.

[0003] Currently, the common practice for simulating rotor imbalance in hot oil pump shaft trajectory detection is as follows: the rotor disc is fixedly installed on the pump shaft, and multiple counterweight holes are opened on the rotor disc along the circumferential direction. The operator selects the appropriate size of counterweight bolts according to the required amount of imbalance and screws them into the counterweight holes. By changing the installation position and number of counterweight bolts, the unbalanced mass of the rotor can be adjusted, thereby simulating different degrees of unbalanced working conditions.

[0004] However, the above-mentioned counterweight adjustment method has many inconveniences in actual operation. First, each time the imbalance is adjusted, the operator needs to repeatedly screw in or out the counterweight bolts and replace them one by one with different specifications to adjust the counterweight mass, which is cumbersome and time-consuming. Second, the weight of the counterweight bolts is a discrete fixed value, and the operator can only choose from a limited number of bolt specifications, making it difficult to accurately control the counterweight mass to achieve the required imbalance. The adjustment accuracy is limited by the type of bolt. In addition, during the repeated disassembly and assembly of the counterweight bolts, the threaded connection is prone to wear, affecting the reliability of the counterweight connection and the consistency of repeated testing.

[0005] Therefore, there is an urgent need to provide a hot oil pump shaft trajectory detection device that is easy to operate and whose counterweight mass can be precisely controlled. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention provides a hot oil pump shaft trajectory detection device that is easy to operate and whose counterweight mass can be precisely controlled.

[0007] The technical implementation of the present invention is as follows: a hot oil pump shaft trajectory detection device includes a sliding mounting platform, a drive component of the hot oil pump structure is slidably mounted on the right side of the sliding mounting platform, a pump housing of the hot oil pump structure is mounted on the left side of the sliding mounting platform, the drive component and the pump housing are connected by a shaft, a shaft trajectory detection mechanism is slidably disposed on the sliding mounting platform at the shaft, and a counterweight adjustment mechanism is also fixedly disposed on the sliding mounting platform at the shaft, and the drive component, the pump housing and the shaft trajectory detection mechanism are fixed in position by fasteners.

[0008] Furthermore, the sliding mounting platform includes a horizontally mounted cast iron platform. The top of the cast iron platform is symmetrically and horizontally arranged with guide shafts. Multiple sliding mounting plates are slidably arranged between the guide shafts. The drive component of the hot oil pump structure is fixedly connected to the rightmost sliding mounting plate, and the pump casing of the hot oil pump structure is fixedly connected to the leftmost sliding mounting plate. A downwardly recessed trapezoidal plate is provided on the top of the cast iron platform between the guide shafts, and the sliding mounting plate is slidably connected to the trapezoidal plate.

[0009] Furthermore, the fastener includes side plates installed on the front and rear sides of the top of the cast iron platform. Each side plate has a horizontal slotted hole. The side plates and the sliding mounting plate partially overlap in the front and rear direction. Fastening bolts are provided on both the front and rear sides of the sliding mounting plate. The fastening bolts pass through their adjacent slotted holes and are connected to threaded sleeves by threads.

[0010] Furthermore, the shaft trajectory detection mechanism is installed on the left and right sides of the counterweight adjustment mechanism. The shaft trajectory detection mechanism includes a support installed on the top of a partial sliding mounting plate. A rhombus frame is fixed to the top of each support. A mounting hole is opened at the center of each side of the rhombus frame. Two eddy current sensors are installed in the mounting holes. The two eddy current sensors are installed at 90°.

[0011] Furthermore, the counterweight adjustment mechanism includes a counterweight disc concentrically mounted on a shaft. Support plates are fixedly connected to the top of the trapezoidal plates on both sides of the counterweight disc. A turntable is rotatably mounted on the top of the support plate. A ring of placement structure is installed on the turntable. A counterweight structure is slidably placed inside the placement structure. The counterweight structure can be fixed on the counterweight disc.

[0012] Furthermore, the counterweight disc includes a rotor disc concentrically mounted on a shaft, with a ring of insertion holes concentrically formed on the rotor disc, each insertion hole having a guide strip, and a row of positioning holes also formed in the insertion hole.

[0013] Furthermore, the placement structure includes a sleeve inserted into the turntable, the counterweight structure is placed inside the sleeve, a retaining ring is concentrically arranged on the side of the sleeve near the rotor disk, and the side of the sleeve near the rotor disk is not sealed.

[0014] Furthermore, the counterweight structure includes a convex hollow counterweight cylinder that slides within a sleeve. A pressing rod is slidably disposed within the convex hollow counterweight cylinder. One end of the pressing rod extends out of the convex hollow counterweight cylinder. A spring connects the pressing rod and the convex hollow counterweight cylinder. A groove is formed at the inner end of the pressing rod, and a retaining shaft is disposed within the groove. An insert block is slidably disposed radially on the side wall of the convex hollow counterweight cylinder at the inner end of the pressing rod. An oblique hole is formed in the portion of the insert block inside the convex hollow counterweight cylinder, and the retaining shaft is disposed within the oblique hole. A guide groove is formed at the bottom of the protruding end of the convex hollow counterweight cylinder.

[0015] Furthermore, the counterweight adjustment mechanism also includes a docking mechanism installed between the support plates. The docking mechanism includes guide rods symmetrically installed between the upper parts of the support plates. The left and right parts of the guide rods are both horizontally slidably provided with moving plates. The upper part of each moving plate is provided with a slot. The lower part of the retaining ring is in its adjacent slot. The support plate is also vertically fixed with an electric rail. The slider of the electric rail is rotatably installed with a hinge rod between it and its adjacent moving plate.

[0016] Furthermore, the counterweight adjustment mechanism also includes a rotating mechanism installed between the turntable and the support plate. The rotating mechanism includes a gear ring concentrically mounted on the outer surface of the turntable. Motors are fixedly connected to the support plate, and small gears are connected to the output shafts of the motors. The small gears mesh with their adjacent gear rings.

[0017] The present invention has the following advantages: By mounting the drive component, pump housing, and shaft trajectory detection mechanism onto corresponding sliding mounting plates on a sliding mounting platform, each sliding mounting plate can slide independently along the guide optical axis and the trapezoidal plate, realizing flexible position adjustment of each component in the shaft axial direction; the guide optical axis and the trapezoidal plate form a double guide structure, which effectively enhances the stability and anti-overturning ability of the sliding mounting plates during the sliding process, while ensuring the parallelism and coaxiality between each sliding mounting plate, thereby ensuring the installation alignment accuracy between the drive component, pump housing, and shaft trajectory detection mechanism, providing a reliable structural foundation for the shaft running stability and shaft trajectory detection accuracy; The rhomboid frame of the shaft center trajectory detection mechanism is designed as an octagonal structure, with a mounting hole at the center of each side. Adjacent mounting holes are spaced at 90° intervals, facilitating the flexible installation of two eddy current sensors in an orthogonal configuration. The two sensors, arranged at 90° orthogonal angles, respectively collect radial vibration displacement signals of the shaft in the horizontal and vertical directions. These signals are then synthesized and displayed in real time using an oscilloscope to create a shaft center trajectory graphic, providing operators with direct evidence to intuitively judge the rotor's operating status. Simultaneously, the sliding mounting plate can drive the detection mechanism to slide axially, enabling multi-position measurement of the shaft center trajectory at different cross-sections of the shaft. By employing a combination of a convex hollow counterweight cylinder, a pressing rod, a spring, an insert block, and a retaining shaft, the counterweight structure can be quickly locked and unlocked within the rotor disc's insertion hole. In the initial state, the spring keeps the insert block extended and locked. Pressing the pressing rod retracts the insert block to unlock it. After releasing, the insert block automatically resets and extends to lock, making the operation simple and reliable. By selecting convex hollow counterweight cylinders of different weights, the counterweight weight can be selected. By inserting the same counterweight structure into the insertion hole at different depths (with the insert block engaging with different positioning holes), the counterweight position can be precisely adjusted, thereby precisely controlling the magnitude and direction of the unbalanced torque. This solves the technical problems of cumbersome operation and difficulty in accurately controlling the counterweight quality of traditional counterweight bolts. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the sliding installation platform of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the fastener of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the axis trajectory detection mechanism of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the counterweight adjustment mechanism of the present invention.

[0023] Figure 6 This is a three-dimensional structural diagram of the counterweight disc of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the counterweight structure of the present invention.

[0025] Figure 8 For the present invention Figure 6 A magnified view of A in the middle.

[0026] Figure 9 This is a three-dimensional structural diagram of the components on the support plate of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the docking mechanism of the present invention.

[0028] Figure 11 This is a three-dimensional structural diagram of the rotating mechanism of the present invention.

[0029] The meanings of the reference numerals in the figure are as follows: 1: Sliding mounting platform; 11: Cast iron platform; 12: Guide shaft; 13: Trapezoidal plate; 14: Sliding mounting plate; 2: Hot oil pump structure; 21: Drive component; 22: Shaft; 23: Pump housing; 3: Fastener; 31: Side plate; 32: Slotted hole; 33: Fastening bolt; 34: Threaded sleeve; 4: Shaft trajectory detection mechanism; 41: Support; 42: Rhomboid frame; 43: Mounting hole; 44: Eddy current sensor; 5: Counterweight adjustment mechanism; 51: Counterweight disc; 511: Rotor disc; 512: Insertion hole; 513: Guide bar. 514: Positioning hole; 52: Support plate; 53: Turntable; 54: Placement structure; 541: Sleeve; 542: Snap ring; 55: Counterweight structure; 551: Convex hollow counterweight cylinder; 552: Pressing rod; 553: Groove; 554: Spring; 555: Insert block; 556: Inclined hole; 557: Snap shaft; 558: Guide groove; 56: Docking mechanism; 561: Guide rod; 562: Moving plate; 563: Snap groove; 564: Electric track; 565: Hinge rod; 57: Rotation mechanism; 571: Gear ring; 572: Pinion; 573: Motor. Detailed Implementation

[0030] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] Example: Figures 1-11 As shown, a hot oil pump shaft trajectory detection device includes a horizontally extending sliding mounting platform 1. The drive component 21 of the hot oil pump structure 2 is slidably mounted on the right side of the sliding mounting platform 1, and the pump housing 23 of the hot oil pump structure 2 is mounted on the left side of the sliding mounting platform 1. The drive component 21 and the pump housing 23 are connected by a shaft 22. A shaft trajectory detection mechanism 4 is slidably mounted on the sliding mounting platform 1 at the shaft 22. The shaft trajectory detection mechanism 4 can change position to detect the trajectory of the shaft 22. A counterweight adjustment mechanism 5 is also fixedly mounted on the sliding mounting platform 1 at the shaft 22. By adjusting the weight and position of the counterweight, the shaft trajectory under unbalanced conditions can be simulated. The drive component 21, the pump housing 23, and the shaft trajectory detection mechanism 4 are fixed in position by fasteners 3, which are installed on the front and rear sides of the sliding mounting platform 1 for the convenience of operators.

[0032] When the hot oil pump shaft trajectory detection device is in operation, the drive component 21, pump housing 23, and shaft trajectory detection mechanism 4 are first installed at their respective positions on the sliding mounting platform 1, and the positions of each component are fixed by fasteners 3. After the drive component 21 is started, it drives the shaft 22 to rotate, simulating the normal operating state of the hot oil pump. At this time, the shaft trajectory detection mechanism 4 can slide left and right along the sliding mounting platform 1 to change its detection position, and detect the radial vibration displacement of the shaft 22 at different axial positions to obtain shaft trajectory data under normal operating conditions. When it is necessary to simulate the rotor imbalance fault state, the counterweight weight and counterweight position are adjusted by the counterweight adjustment mechanism 5, so that the shaft 22 generates a controllable unbalanced centrifugal force during rotation, thereby changing the vibration response of the shaft 22. The shaft trajectory detection mechanism 4 then detects the shaft 22 in the unbalanced state again to obtain shaft trajectory data under the unbalanced operating conditions. By comparing the shaft trajectory in the normal state and the simulated unbalanced state, the accurate diagnosis and analysis of the hot oil pump rotor imbalance fault can be achieved. Fasteners 3 are installed on the front and rear sides of the sliding mounting platform 1, which facilitates the operator to quickly disassemble and adjust the position of each component before or during the inspection.

[0033] like Figure 2 As shown, the sliding mounting platform 1 includes a cast iron platform 11, guide shafts 12, trapezoidal plates 13, and sliding mounting plates 14. The cast iron platform 11 extends horizontally to the left and right. The top of the cast iron platform 11 is symmetrically and horizontally arranged with guide shafts 12 extending to the left and right. Four sliding mounting plates 14 are slidably arranged between the guide shafts 12. The driving component 21 of the hot oil pump structure 2 is positioned and installed on the top of the rightmost sliding mounting plate 14 with pins and pin holes, and then fixed with bolts and nuts. The pump housing 23 of the hot oil pump structure 2 is positioned and installed on the top of the leftmost sliding mounting plate 14 with pins and pin holes, and then fixed with bolts and nuts. The top of the cast iron platform 11 between the guide shafts 12 is provided with a downwardly recessed trapezoidal plate 13. The sliding mounting plates 14 are slidably connected to the trapezoidal plates 13. The sliding connection between the guide shafts 12 and the trapezoidal plates 13 makes the sliding mounting plates 14 more stable and the installation accuracy higher.

[0034] like Figure 3 As shown, the fastener 3 includes a side plate 31, a fastening bolt 33, and a threaded sleeve 34. The cast iron platform 11 has side plates 31 extending to the left and right on both the front and rear sides of the top. Each side plate 31 has a horizontal slotted hole 32. The side plates 31 and the sliding mounting plate 14 partially overlap in the front and rear direction. The sliding mounting plate 14 has fastening bolts 33 extending to the front and rear on both the front and rear sides. The fastening bolts 33 pass through their adjacent slotted holes 32 and are connected to the threaded sleeve 34 by threads. The corresponding sliding mounting plate 14 can be fixed by rotating the threaded sleeve 34, and the corresponding sliding mounting plate 14 can also be loosened by rotating the threaded sleeve 34.

[0035] The entire sliding mounting platform 1 is supported by a cast iron platform 11, which is horizontally installed to provide a stable mounting reference for the drive component 21, pump housing 23, and detection mechanism. Four sliding mounting plates 14 support the drive component 21, pump housing 23, and other components. Each sliding mounting plate 14 simultaneously forms a sliding fit with the guide shafts 12 on both the front and rear sides, as well as the trapezoidal plate 13 on the top of the cast iron platform 11. The guide shafts 12 are symmetrically arranged horizontally, providing guidance and support for the sliding mounting plates 14 along the axial direction of the shaft 22, limiting their sway in the horizontal plane. The trapezoidal plate 13 is located on the top of the cast iron platform 11 between the guide shafts 12, and its downwardly recessed structure fits with the bottom of the sliding mounting plate 14, further constraining the vertical and lateral displacement of the sliding mounting plate 14. The guide shafts 12 and the trapezoidal plate 13 form a dual guiding structure; their synergistic effect effectively enhances the stability and anti-overturning ability of the sliding mounting plate 14 during left and right sliding, while ensuring the parallelism and coaxiality between the sliding mounting plates 14. The drive component 21 is positioned and installed on the top of the rightmost sliding mounting plate 14 with pins and pin holes, and the pump housing 23 is positioned and installed on the top of the leftmost sliding mounting plate 14 with pins and pin holes. The positioning hole 514 and the positioning pin ensure the precise alignment of the drive component 21 and the pump housing 23 during installation, and then they are locked and fixed with bolts and nuts.

[0036] When it is necessary to adjust the relative position between the drive component 21 and the pump housing 23 or to adjust the detection position of the shaft trajectory detection mechanism 4, the operator pushes the corresponding sliding mounting plate 14, causing it to slide left and right along the guide optical axis 12 and the trapezoidal plate 13 to the target position. After the position adjustment is completed, the sliding mounting plate 14 is fixed and locked by the fastener 3. The working principle of the fastener 3 is as follows: a slotted hole 32 is opened on the side plates 31 installed on the front and rear sides of the top of the cast iron platform 11. The fastening bolts 33 extending from the front and rear sides of the sliding mounting plate 14 pass through the corresponding slotted hole 32 on the side plates 31. The operator rotates the threaded sleeve 34, causing the threaded sleeve 34 to move axially along the fastening bolt 33. When the threaded sleeve 34 is tightened towards the side plate 31, the end face of the threaded sleeve 34 presses against the outer side of the side plate 31, and the sliding mounting plate 14 is clamped and fixed to the side plate 31 by the friction between the threaded sleeve 34 and the side plate 31. When it is necessary to readjust the position of the sliding mounting plate 14, the threaded sleeve 34 is rotated in the opposite direction to separate it from the side plate 31, releasing the clamping state, and the sliding mounting plate 14 can slide freely. The slotted hole 32 provides left and right guidance and stroke limit for the fastening bolt 33, ensuring that the sliding mounting plate 14 always moves in the set axial direction before and after locking, avoiding positional deviation.

[0037] Through the cooperation of the sliding mounting platform 1 and the fastener 3, the device not only realizes the flexible position adjustment of each component in the axial direction of the shaft 22, but also can quickly and reliably lock and fix it after adjustment. At the same time, it ensures the installation alignment accuracy between the drive component 21, the pump housing 23 and the shaft trajectory detection mechanism 4, providing a stable structural foundation for the accurate detection of the hot oil pump shaft trajectory.

[0038] like Figure 4 As shown, the shaft trajectory detection mechanism 4 is installed on the left and right sides of the counterweight adjustment mechanism 5. The shaft trajectory detection mechanism 4 includes a support 41, a rhombus frame 42, and an eddy current sensor 44. The tops of the two middle sliding mounting plates 14 are positioned and installed with the support 41 by positioning pins and positioning holes 514, and then fixed by bolts and nuts. The top of the support 41 is fixed with a rhombus frame 42. The rhombus frame 42 is octagonal, and each side of the rhombus frame 42 has a mounting hole 43 at its center. Therefore, the angle between two adjacent mounting holes 43 is 90°. Two eddy current sensors 44 are installed in the mounting holes 43. The two eddy current sensors 44 are installed at 90° and are connected to an oscilloscope.

[0039] The support 41 is positioned and installed on the top of the two middle sliding mounting plates 14 by positioning pins and positioning holes 514, and is locked and fixed by bolts and nuts to ensure precise alignment and reliable connection between the support 41 and the sliding mounting plates 14. The rhomboid frame 42 fixed to the top of the support 41 serves as the mounting carrier for the eddy current sensor 44. The rhomboid frame 42 is set as an octagonal structure, and a mounting hole 43 is opened at the center of each side. Since the included angle between adjacent sides of the octagon is 135°, the included angle between two adjacent mounting holes 43 is 90° after connecting the center of each side mounting hole 43 with the center of the rhomboid frame 42. Eddy current sensors 44 are installed in the two mounting holes 43 that are 90° apart, so that the two sensors are orthogonally arranged in space, corresponding to the horizontal direction (X direction) and the vertical direction (Y direction) respectively. When the shaft 22 rotates, two orthogonally arranged eddy current sensors 44 collect the radial vibration displacement signals of the shaft 22 in the X and Y directions in real time, and convert the collected displacement signals into voltage signals, which are then transmitted to an oscilloscope. After receiving the two orthogonal voltage signals, the oscilloscope uses the X-axis signal as the horizontal axis input and the Y-axis signal as the vertical axis input, and synthesizes and displays the shaft center trajectory graphic of the shaft 22 on the screen in real time. Simultaneously, the sliding mounting plate 14 can drive the support 41 and the rhomboid frame 42 to slide left and right along the sliding mounting platform 1, thereby adjusting the detection position of the eddy current sensors 44 in the axial direction of the shaft 22, realizing the measurement of the shaft center trajectory at different cross-sections of the shaft 22. The oscilloscope displays the changes in the shaft center trajectory at different detection positions in real time, allowing operators to intuitively observe the differences in the shaft center trajectory shape of the shaft 22 under normal operating conditions and under simulated unbalanced operating conditions with counterweight adjustment, providing direct visual evidence for judging the rotor's operating status. The octagonal rhomboid frame 42 provides multiple mounting holes 43 spaced at 90° intervals, which not only facilitates flexible installation of the sensor in an orthogonal manner, but also provides convenience for subsequent sensor layout adjustments or expansion of multi-section measurements.

[0040] like Figures 5-8 and Figure 10 As shown, the counterweight adjustment mechanism 5 includes a counterweight plate 51, a support plate 52, a turntable 53, a placement structure 54, and a counterweight structure 55. The counterweight plate 51 is concentrically fixed in the middle of the shaft 22. The tops of the trapezoidal plates 13 on both sides of the counterweight plate 51 are fixed to the support plates 52. The turntable 53 is rotatably installed on the top of the support plates 52. The turntable 53 is coaxially installed with the counterweight plate 51. A ring of placement structure 54 is installed on the turntable 53. The counterweight structure 55 is slidably placed in the placement structure 54 (the weights of the counterweight structures 55 are all different and can be made according to one's own needs). The counterweight structure 55 can be fixed on the counterweight plate 51, and the depth of fixing on the counterweight plate 51 can be adjusted to adjust the position of the counterweight. By replacing the counterweight structure 55 with different weights, the weight of the counterweight can be adjusted.

[0041] like Figure 6As shown, the counterweight disk 51 includes a rotor disk 511 and guide bars 513. The rotor disk 511 is concentrically fixed to the middle of the shaft 22. A ring of insertion holes 512 is concentrically opened on the rotor disk 511. The insertion holes 512 extend left and right through the rotor disk 511. The counterweight structure 55 is inserted into the insertion hole 512 to complete the docking with the rotor disk 511. Guide bars 513 are provided in the insertion hole 512 to extend left and right. The guide bars 513 are used for positioning and inserting the counterweight structure 55. A row of positioning holes 514 extending left and right are also opened in the insertion hole 512. The counterweight structure 55 docks with the positioning holes 514 at different positions to realize the insertion and fixation of the counterweight structure 55 at different depths.

[0042] like Figure 10 As shown, the placement structure 54 includes a sleeve 541 and a retaining ring 542. A sleeve 541 is inserted into the turntable 53. The turntable 53 and the sleeve 541 can be initially fixed by magnetic attraction. The counterweight structure 55 is placed inside the sleeve 541. The retaining ring 542 is concentrically arranged on the side of the sleeve 541 near the rotor disk 511. The side of the sleeve 541 near the rotor disk 511 is not sealed, so that the counterweight structure 55 can slide out from the inner end of the sleeve 541 and be inserted into the insertion hole 512.

[0043] like Figure 7 As shown, the counterweight structure 55 includes a convex hollow counterweight cylinder 551, a pressing rod 552, a spring 554, an insert block 555, and a retaining shaft 557. The convex hollow counterweight cylinder 551 is slidably placed inside the sleeve 541, with its protruding portion facing inwards. The pressing rod 552 is concentrically slidably positioned left and right inside the convex hollow counterweight cylinder 551, with its outer end extending out of the convex hollow counterweight cylinder 551. A spring 554 connects the pressing rod 552 and the convex hollow counterweight cylinder 551, maintaining the initial position of the pressing rod 552 and providing power for its reset. A groove 553 is formed at the inner end of the pressing rod 552, and a retaining shaft 557 is disposed within the groove 553. An insert block is slidably positioned radially along the side wall of the convex hollow counterweight cylinder 551 at the inner end of the pressing rod 552. 555, the size and shape of the insert 555 correspond to the positioning hole 514. The insert 555 is inserted into the positioning hole 514 at different positions, which can fix the convex hollow counterweight cylinder 551 at different positions. The part of the insert 555 inside the convex hollow counterweight cylinder 551 has an oblique hole 556. The oblique hole 556 is opened obliquely from the outside to the inside and upward. The retaining shaft 557 is inside the oblique hole 556. Pressing the pressing rod 552 inward, under the action of the oblique hole 556, the insert 555 retracts into the convex hollow counterweight cylinder 551, so that the convex hollow counterweight cylinder 551 can be inserted into the insertion hole 512. The bottom of the protruding end of the convex hollow counterweight cylinder 551 has a guide groove 558. The guide groove 558 is correspondingly set with the guide bar 513. When the convex hollow counterweight cylinder 551 is inserted into the insertion hole 512, the guide bar 513 is inserted into the guide groove 558.

[0044] When simulating an unbalanced working condition, the operator first rotates the turntable 53 and aligns the required weight of the counterweight structure 55 (each convex hollow counterweight cylinder 551 has a different weight and can be selected as needed) with the corresponding insertion hole 512 on the rotor disc 511. At this time, the spring 554 keeps the pressing rod 552 in the extended position, and the retaining shaft 557 is located at the high point of the outer end of the inclined hole 556 of the insertion block 555. Under the wedge-shaped action of the inclined hole 556 and the retaining shaft 557, the insertion block 555 is pushed to extend radially outward from the side wall of the convex hollow counterweight cylinder 551. The insertion block 555 is in the extended state, and the convex hollow counterweight cylinder 551 cannot be inserted into the insertion hole 512.

[0045] The operator presses the pressing rod 552 inward, causing it to slide inward against the force of the spring 554. This drives the retaining shaft 557 to move inward along the inclined hole 556 on the insert block 555. Guided by the inclined surface of the inclined hole 556, the insert block 555 retracts radially inward along the convex hollow counterweight cylinder 551, completely retracting into the convex hollow counterweight cylinder 551. At this point, the operator can push the convex hollow counterweight cylinder 551 out from the inner end of the sleeve 541 and insert it into the corresponding insertion hole 512 on the rotor disc 511. During insertion, the guide groove 558 at the bottom of the convex hollow counterweight cylinder 551 corresponds to and engages with the guide strip 513 in the insertion hole 512. The guide strip 513 is embedded in the guide groove 558, positioning and guiding the insertion direction of the convex hollow counterweight cylinder 551, ensuring accurate axial movement along the insertion hole 512 and preventing circumferential deflection.

[0046] When the convex hollow counterweight cylinder 551 is inserted to the required depth and the insert block 555 moves to the corresponding positioning hole 514, the operator releases the pressing rod 552. The restoring force of the spring 554 pushes the pressing rod 552 back outward, causing the locking shaft 557 to slide outward along the inclined hole 556. The wedge-shaped action of the inclined surface of the inclined hole 556 pushes the insert block 555 radially outward, causing it to automatically extend and insert into the positioning hole 514 corresponding to that depth. This securely locks the convex hollow counterweight cylinder 551 at the current insertion depth on the rotor disk 511. By inserting convex hollow counterweight cylinders 551 of different weights into the insertion holes 512 at different positions, the counterweight weight can be selected. By adjusting the different depths the same counterweight structure 55 is inserted into the insertion hole 512, the radial distance of the counterweight relative to the rotation axis of the rotor disk 511 is changed, thereby precisely adjusting the magnitude and direction of the unbalanced torque.

[0047] When it is necessary to remove or replace the counterweight structure 55, press the pressing rod 552 again to retract the insert block 555, and the convex hollow counterweight cylinder 551 can be pulled out from the insertion hole 512 and inserted back into the sleeve 541. Through the above-mentioned locking mechanism of pressing to unlock before insertion and automatic locking after positioning, the counterweight adjustment mechanism 5 realizes the quick loading and unloading and precise position adjustment of the counterweight structure 55, providing a convenient and reliable counterweight adjustment means for simulating different degrees of imbalance in the hot oil pump shaft trajectory detection.

[0048] like Figure 10 As shown, the counterweight adjustment mechanism 5 also includes a docking mechanism 56 installed between the support plates 52. The docking mechanism 56 includes a guide rod 561, a movable plate 562, an electric rail 564, and a hinge rod 565. The upper part of the support plates 52 is symmetrically arranged with guide rods 561 extending left and right. The left and right parts of the guide rods 561 are horizontally slidably equipped with movable plates 562. The upper part of the movable plates 562 is provided with slots 563. The lower part of the retaining ring 542 is in the adjacent slot 563. The electric rail 564 is also vertically fixed on the support plate 52. The slider of the electric rail 564 is rotatably installed with the hinge rod 565 between its adjacent movable plate 562 and the inner side of the slider. The lower part of the hinge rod 565 is driven to move upward by the electric rail 564, which drives the upper end of the hinge rod 565 to move inward. Then, the movable plate 562 drives the sleeve 541 to move inward, so that the counterweight structure 55 moves inward and inserts into the insertion hole 512.

[0049] The entire docking process is performed at the lower position, specifically at the lower counterweight structure 55. Initially, the sleeve 541 and its internal counterweight structure 55 are positioned on the turntable 53, with the convex hollow counterweight cylinder 551 inside the sleeve 541. When the counterweight structure 55 needs to be inserted into the counterweight disk 51, the electric track 564 is activated, its slider moves upward along the track, causing the lower end of the hinge rod 565 to move upward, while the upper end of the hinge rod 565 swings inward (towards the shaft 22), pushing the moving plate 562 to slide inward along the guide rod 561. The moving plate 562, through the engagement of the slot 563 and the retaining ring 542, moves the sleeve 541 and its internal counterweight structure 55 towards the counterweight disk 51 (to the right).

[0050] When the front end of the convex hollow counterweight cylinder 551 moves to contact the end face of the insertion hole 512 on the counterweight plate 51, the electric track 564 continues to drive, and the sleeve 541 continues to move towards the counterweight plate 51 under the drive of the moving plate 562. However, since the front end of the convex hollow counterweight cylinder 551 has been blocked by the end face of the insertion hole 512, the convex hollow counterweight cylinder 551 slides in the opposite direction relative to the sleeve 541. That is, the sleeve 541 continues to move forward while the convex hollow counterweight cylinder 551 stays in the original position, and the inner end face of the sleeve 541 gradually approaches and contacts the outer end of the pressing rod 552. As the sleeve 541 continues to move, the inner end face of the sleeve 541 applies a pressing force to the pressing rod 552, overcoming the force of the spring 554 and pressing the pressing rod 552 inward. This causes the retaining pin 557 to move inward and downward along the inclined hole 556 on the insert block 555. Guided by the inclined surface of the inclined hole 556, the insert block 555 retracts radially inward along the convex hollow counterweight cylinder 551, completely retracting the insert block 555 into the convex hollow counterweight cylinder 551, thus unlocking the counterweight structure 55. Subsequently, with the continued pushing of the sleeve 541, the convex hollow counterweight cylinder 551 is smoothly inserted into the insertion hole 512.

[0051] Throughout the process of inserting the convex hollow counterweight cylinder 551 into the insertion hole 512, the electric track 564 continuously drives the sleeve 541 forward. When the inner end face of the sleeve 541 stops before the convex hollow counterweight cylinder 551 reaches the designated position, it will press the rod 552 again, keeping the insert block 555 retracted and the counterweight structure 55 always unlocked. Therefore, as the convex hollow counterweight cylinder 551 passes through each positioning hole 514 within the insertion hole 512, the insert block 555 can be forced to retract, ensuring that the convex hollow counterweight cylinder 551 can smoothly and continuously advance deeper into the insertion hole 512 without being affected by the positioning holes 514 encountered along the way. Simultaneously, the guide groove 558 at the bottom of the convex hollow counterweight cylinder 551 corresponds to and engages with the guide strip 513 provided within the insertion hole 512. The guide strip 513 is embedded in the guide groove 558, positioning and guiding the insertion direction of the convex hollow counterweight cylinder 551, ensuring its accurate movement along the axial direction of the insertion hole 512.

[0052] When the convex hollow counterweight cylinder 551 is inserted to the preset required depth, the electric track 564 stops driving, and the sleeve 541 stops moving accordingly. The inner end face of the sleeve 541 no longer presses the pressing rod 552. The restoring force of the spring 554 pushes the pressing rod 552 to move back to the outer end, causing the locking shaft 557 to slide along the inclined hole 556 to the outer end. The wedge-shaped action of the inclined surface of the inclined hole 556 pushes the insert 555 radially outward, so that the insert 555 automatically extends and inserts into the positioning hole 514 corresponding to the depth position, firmly locking the convex hollow counterweight cylinder 551 to the current insertion depth position on the rotor disk 511. Then, the electric track 564 drives the sleeve 541 to move outward and reset.

[0053] Through the aforementioned docking mechanism 56, the electric track 564 provides a stable driving force, the hinge rod 565 converts the vertical movement into a horizontal push, and the guide rod 561 and the moving plate 562 ensure that the sleeve 541 moves precisely along the axial direction. During the movement, the sleeve 541 automatically completes the pressing and unlocking of the pressing rod 552 without manual intervention. This realizes the automated and smooth docking and insertion of the counterweight structure 55 from the turntable 53 position into the counterweight plate 51 insertion hole 512, reducing the difficulty of operation and improving the efficiency and accuracy of counterweight adjustment.

[0054] like Figure 11 As shown, the counterweight adjustment mechanism 5 also includes a rotating mechanism 57 installed between the turntable 53 and the support plate 52. The rotating mechanism 57 includes a gear ring 571, a pinion 572, and a motor 573. The gear ring 571 is concentrically mounted on the outer surface of the turntable 53. The motor 573 is fixedly connected to the support plate 52. The output shaft of the motor 573 is connected to the pinion 572. The pinion 572 meshes with its adjacent gear ring 571. The motor 573 drives the pinion 572 and the gear ring 571 to rotate, so that the turntable 53 rotates and drives the counterweight structure 55 to change position, so as to facilitate the replacement of counterweight structures 55 with different weights.

[0055] When it is necessary to switch the counterweight structure 55, the motor 573 starts, and its output shaft drives the pinion 572 to rotate. The pinion 572 drives the gear ring 571 to rotate through meshing transmission, and the gear ring 571 in turn drives the turntable 53 to rotate around its axis. When the turntable 53 rotates, each sleeve 541 installed on the turntable 53 and the counterweight structure 55 placed in the sleeve 541 move circumferentially with the turntable 53, thereby rotating the required weight (i.e., the convex hollow counterweight cylinder 551 at the required position) to the docking position directly below, so that the subsequent docking mechanism 56 can insert the counterweight structure 55 into the counterweight disk 51. Through the forward and reverse rotation control of the motor 573, the turntable 53 can rotate in both directions, realizing the rapid selection and switching of different counterweight structures 55. The motors 573 on the two plates 52 and the symmetrically arranged pinions 572 simultaneously mesh and drive the gear ring 571. This provides sufficient driving torque to ensure smooth rotation of the turntable 53. Furthermore, the dual-sided synchronous drive eliminates the off-center torque that might result from unilateral drive, ensuring uniform force on the gear ring 571 and guaranteeing the rotational accuracy and positioning precision of the turntable 53. This rotating mechanism 57 enables rapid and precise switching between different weight counterweight structures 55. Combined with the automated insertion operation of the docking mechanism 56, the entire counterweight adjustment process eliminates the need for manual rotation of the turntable 53 and selection of counterweights, significantly improving the automation and operational efficiency of counterweight adjustment.

[0056] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the invention without departing from the principles and spirit of the invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for illustrative purposes only and is not intended to limit the invention; rather, the scope of protection is defined by the content of the claims.

Claims

1. A device for detecting the shaft trajectory of a hot oil pump, characterized in that: The system includes a sliding mounting platform (1), a drive component (21) of a hot oil pump structure (2) which is slidably mounted on the right side of the sliding mounting platform (1), and a pump housing (23) of the hot oil pump structure (2) which is mounted on the left side of the sliding mounting platform (1). The drive component (21) and the pump housing (23) are connected by a shaft (22). A shaft center trajectory detection mechanism (4) is slidably mounted on the sliding mounting platform (1) at the shaft (22). A counterweight adjustment mechanism (5) is also fixedly mounted on the sliding mounting platform (1) at the shaft (22). The drive component (21), the pump housing (23) and the shaft center trajectory detection mechanism (4) are fixed in position by fasteners (3).

2. The hot oil pump shaft trajectory detection device according to claim 1, characterized in that: The sliding mounting platform (1) includes a horizontally mounted cast iron platform (11). The top of the cast iron platform (11) is symmetrically and horizontally arranged with guide optical shafts (12). Multiple sliding mounting plates (14) are slidably arranged between the guide optical shafts (12). The driving component (21) of the hot oil pump structure (2) is fixedly connected to the rightmost sliding mounting plate (14). The pump casing (23) of the hot oil pump structure (2) is fixedly connected to the leftmost sliding mounting plate (14). The top of the cast iron platform (11) between the guide optical shafts (12) is provided with a downwardly recessed trapezoidal plate (13). The sliding mounting plate (14) is slidably connected to the trapezoidal plate (13).

3. The hot oil pump shaft trajectory detection device according to claim 2, characterized in that: The fastener (3) includes side plates (31) installed on the front and rear sides of the top of the cast iron platform (11). Each side plate (31) has a horizontal slotted hole (32). The side plates (31) and the sliding mounting plate (14) partially overlap in the front and rear direction. Each sliding mounting plate (14) has a fastening bolt (33) on both the front and rear sides. The fastening bolt (33) passes through its adjacent slotted hole (32) and is connected to a threaded sleeve (34) by a thread.

4. The hot oil pump shaft trajectory detection device according to claim 2, characterized in that: The shaft trajectory detection mechanism (4) is installed on the left and right sides of the counterweight adjustment mechanism (5). The shaft trajectory detection mechanism (4) includes a support (41) installed on the top of a partial sliding mounting plate (14). A rhombus frame (42) is fixed to the top of each support (41). A mounting hole (43) is opened at the center of each side of the rhombus frame (42). Two eddy current sensors (44) are installed in the mounting hole (43). The two eddy current sensors (44) are installed at 90°.

5. A hot oil pump shaft trajectory detection device according to claim 2, characterized in that: The counterweight adjustment mechanism (5) includes a counterweight disk (51) concentrically mounted on a shaft (22). The top of the trapezoidal plates (13) on both sides of the counterweight disk (51) is fixedly connected to a support plate (52). A turntable (53) is rotatably mounted on the top of the support plate (52). A ring of placement structure (54) is installed on the turntable (53). A counterweight structure (55) is slidably placed inside the placement structure (54). The counterweight structure (55) can be fixed on the counterweight disk (51).

6. A hot oil pump shaft trajectory detection device according to claim 5, characterized in that: The counterweight disk (51) includes a rotor disk (511) concentrically mounted on a shaft (22). A ring of insertion holes (512) is concentrically opened on the rotor disk (511). A guide strip (513) is provided in each insertion hole (512). A row of positioning holes (514) is also opened in the insertion hole (512).

7. A hot oil pump shaft trajectory detection device according to claim 6, characterized in that: The placement structure (54) includes a sleeve (541) inserted into the turntable (53), the counterweight structure (55) is placed inside the sleeve (541), and a retaining ring (542) is concentrically provided on the side of the sleeve (541) near the rotor disk (511). The side of the sleeve (541) near the rotor disk (511) is not sealed.

8. A hot oil pump shaft trajectory detection device according to claim 7, characterized in that: The counterweight structure (55) includes a convex hollow counterweight cylinder (551) that is slidably placed inside a sleeve (541). A pressing rod (552) is slidably arranged inside the convex hollow counterweight cylinder (551). One end of the pressing rod (552) extends out of the convex hollow counterweight cylinder (551). A spring (554) connects the pressing rod (552) and the convex hollow counterweight cylinder (551). A groove (553) is provided at the inner end of the pressing rod (552). A retaining pin (557) is provided in the groove (553). A plug (555) is slidably provided on the side wall of the convex hollow counterweight cylinder (551) at the inner end of the pressing rod (552) along its radial direction. The portion of the plug (555) inside the convex hollow counterweight cylinder (551) has an oblique hole (556). The retaining pin (557) is inside the oblique hole (556). A guide groove (558) is provided at the bottom of the protruding end of the convex hollow counterweight cylinder (551).

9. A hot oil pump shaft trajectory detection device according to claim 8, characterized in that: The counterweight adjustment mechanism (5) further includes a docking mechanism (56) installed between the support plates (52). The docking mechanism (56) includes guide rods (561) symmetrically installed between the upper parts of the support plates (52). The left and right parts of the guide rods (561) are both horizontally slidably provided with moving plates (562). The upper part of the moving plates (562) is provided with slots (563). The lower part of the retaining ring (542) is in its adjacent slot (563). The support plate (52) is also vertically fixed with an electric track (564). The slider of the electric track (564) is rotatably installed with a hinge rod (565) between it and its adjacent moving plate (562).

10. A hot oil pump shaft trajectory detection device according to claim 5, characterized in that: The counterweight adjustment mechanism (5) further includes a rotating mechanism (57) installed between the turntable (53) and the support plate (52). The rotating mechanism (57) includes a gear ring (571) concentrically installed on the outer surface of the turntable (53). A motor (573) is fixedly connected to each of the support plates (52). A pinion (572) is connected to the output shaft of each motor (573). The pinion (572) meshes with its adjacent gear ring (571).

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