Hydraulic damper overhauling device

Abstract

The utility model discloses a hydraulic damper overhauling device, and belongs to the technical field of hydraulic damper overhauling. The device comprises a frame, a pulling and pressing module, an unscrewing and screwing module, a hydraulic oil pumping and filling module and a display control module. By arranging the pulling and pressing module, the unscrewing and screwing module, the hydraulic oil pumping and filling module and the display control module, the maintenance efficiency and quality can be remarkably improved, and danger caused by manual operation is reduced. Automatic equipment can execute accurate operations such as automatic disassembly and assembly, accurate measurement of damping performance data, cleaning and liquid medium replacement, and personal errors are reduced. In addition, the automation equipment can monitor the state of the hydraulic damper through a sensor, obtain data in real time and carry out fault diagnosis and predictive analysis, and the accuracy and efficiency of fault detection are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to damper overhauls technical field, concretely relates to a hydraulic damper overhauls device. BACKGROUND

[0002] Hydraulic dampers play a critical role in many industrial fields. They are widely used in the fields of aviation, high-speed trains, bridges, buildings, vibrating equipment and engineering machinery, etc. for reducing the vibration, impact and shock of structures and equipment. The normal operation of hydraulic dampers is essential for protecting equipment, prolonging service life and ensuring personnel and environmental safety.

[0003] During long-term use, hydraulic dampers may fail or have performance degradation due to reasons such as working environment, load variation and wear. In order to ensure the normal operation of hydraulic dampers, users need to disassemble, maintain and check them regularly according to maintenance requirements to ensure their normal operation. However, current repair and verification requires manual intervention and time-consuming maintenance processes. These processes include disassembling the hydraulic damper, cleaning and replacing the liquid medium, checking and replacing the seal, reassembling, etc. This not only requires a lot of manual labor and time, but also has the challenges of error and quality control. The existing defects and disadvantages are: first, manual disassembly of the end cover with a wrench is easy to cause damage to the structure of the skid hydraulic damper. Second, the verification result has low confidence. The current verification method uses a 20Kg weight to load the gravity of the damper to be verified and manually times with a stopwatch, which is not only time-consuming and laborious but also has low confidence in the verification result.

[0004] Therefore, it is necessary to develop a hydraulic damper overhauls device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a hydraulic damper overhauls device which can significantly improve the maintenance efficiency and quality, perform accurate operations, and improve the accuracy and efficiency of fault detection.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A hydraulic damper overhauls device, comprising a frame, a tension-compression module, a screwing-off and screwing-in module, a hydraulic oil pumping and pumping module, and a display control module.

[0008] Specifically, the frame comprises a top plate, four optical shafts, a T-shaped joint, a damper clamp slot, a base, a back plate, a triangular reinforcing rib and a bottom plate; the lower end of the bottom plate is provided with the base and is fixedly connected by bolts, the bottom plate is fixedly connected with the lower ends of the two lower optical shafts by bolts, and the upper ends of the two upper optical shafts are fixedly connected with one end of the top plate by bolts; one end of the T-shaped joint is fixedly connected with the back plate by bolts, and the other end is connected with the opposite ends of the upper optical shaft and the lower optical shaft; the other end of the top plate is fixedly connected with the upper end of the back plate by bolts, and the lower end of the back plate is fixedly connected with the base by bolts; the short straight angle edge of the triangular reinforcing rib is fixedly connected with the bottom plate by bolts, and the long straight angle edge of the triangular reinforcing rib is fixedly connected with the back plate by bolts; the lower end of the damper clamp slot is fixedly connected with the bottom plate by bolts.

[0009] Specifically, the material of the frame is mainly composed of aluminum alloy profiles and No. 45 steel; wherein the material of the four optical shafts is No. 45 steel, and the rest of the frame adopts aluminum alloy plates or profiles; the bottom plate and the top plate are provided with holes and slots for mounting parts, the four optical shafts are connected with the back plate through the T-shaped joint, and the base is made of hard rubber material.

[0010] Specifically, the pulling and pressing module, the unscrewing and screwing module, the pumping and pumping hydraulic oil module and the display control module specifically comprise: slide table, stepping motor, pressure sensor, U-shaped piece, support shaft, cover opening device, planetary gear reducer, brushless motor, linear bearing, small peristaltic oil pump, touch display screen, case these components; one side of the slide table is slidingly connected with the back plate, the lower end of the slide table is fixedly connected with the stepping motor by bolts, the upper end of the slide table is provided with a through hole, and the cylindrical sleeve of the upper end of the stepping motor is arranged in the through hole of the upper end of the slide table; the upper end of the pressure sensor is fixedly connected with the stepping motor by bolts, and the lower end of the pressure sensor is fixedly connected with the upper end of the U-shaped piece by bolts; the upper end of the support shaft is clamped on the T-shaped joint, and the lower end of the support shaft is fixedly connected with the bottom plate by bolts; the two sides of the cover opening device are respectively sleeved on the two upper optical shafts, the two sides of the cover opening device are also provided with linear bearings and are respectively sleeved on the two upper optical shafts, and the upper end of the cover opening device is provided with a planetary gear reducer and a brushless motor; the upper end of the touch display screen is fixedly connected with the top plate by bolts; the lower end of the case is fixedly connected with the bottom plate by bolts; the small peristaltic oil pump is fixedly arranged on one side of the case.

[0011] Specifically, the cover opening device comprises a large gear, the large gear is provided with a pin hole, the large gear is toothed with a small gear, and the small gear is provided with a ball bearing.

[0012] Specifically, the touch display screen and the case are electrically connected, the case is provided with a control system and a power supply, and the control system adopts an STM32 single-chip microcomputer as a main control chip.

[0013] Specifically, the boundaries of each component are chamfered.

[0014] The hydraulic damper maintenance device has the advantages that:

[0015] The present application can significantly improve maintenance efficiency and quality, and reduce the risks brought by manual operation. The automated equipment can perform precise operations such as automatic disassembly and assembly, accurate measurement of damping performance data, cleaning and liquid medium replacement, reducing human error. In addition, the automated equipment can also monitor the state of the hydraulic damper through sensors, obtain data in real time, and perform fault diagnosis and predictive analysis, improving the accuracy and efficiency of fault detection.

[0016] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiment of the present application and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 FIG. 1 is a structural schematic view of a hydraulic damper maintenance device according to an embodiment of the present application;

[0018] Fig. 2 FIG. 2 is a structural schematic view of a frame according to an embodiment of the present application;

[0019] Fig. 3 FIG. 3 is a structural schematic view of a cover opening device according to an embodiment of the present application.

[0020] The frame 1, the top plate 101, the optical axis 102, the T-shaped joint 103, the damper clamp groove 104, the base 105, the back plate 106, the triangular reinforcing rib 107, the bottom plate 108, the sliding table 2, the stepping motor 3, the pressure sensor 4, the U-shaped piece 5, the support shaft 6, the cover opening device 7, the large gear 701, the pin hole 702, the small gear 703, the ball bearing 704, the planetary gear reducer 8, the brushless motor 9, the linear bearing 10, the small peristaltic oil pump 11, the touch display screen 12, and the case 13. DETAILED DESCRIPTION

[0021] The technical scheme of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0022] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it needs to explain, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0025] Please see Figs. 1-2 The utility model provides a kind of hydraulic damper overhaul device, including frame 1, pull pressure module, screw open and tight module, pumping hydraulic oil module, display control module.

[0026] Specifically, frame 1 includes top plate 101, four optical axes 102, T joint 103, damper clamp groove 104, base 105, back plate 106, triangular reinforcing rib 107 and bottom plate 108. The lower end of bottom plate 108 is provided with base 105 and is fixedly connected by bolt, bottom plate 108 is fixedly connected with the lower end of the lower two optical axes 102 by bolt, the upper end of the upper two optical axes 102 is fixedly connected with one end of top plate 101 by bolt. One end of T joint 103 is fixedly connected with back plate 106 by bolt, and the other end is connected with the opposite end of the upper optical axis 102 and the lower optical axis 102. The other end of top plate 101 is fixedly connected with the upper end of back plate 106 by bolt, and the lower end of back plate 106 is fixedly connected with base 105 by bolt. The short straight angle edge of triangular reinforcing rib is fixedly connected with bottom plate 108 by bolt, and the long straight angle edge of triangular reinforcing rib is fixedly connected with back plate 106 by bolt. The lower end of damper clamp groove 104 is fixedly connected with bottom plate 108 by bolt.

[0027] Specifically, the material of the frame 1 is mainly composed of two kinds of materials, aluminum alloy profiles and 45 steel. Among them, the material of the straight light shaft 102 is 45 steel, and the rest of the frame 1 adopts 6061 aluminum alloy plate or profile. And the boundary of each part is chamfered, on the one hand to avoid stress concentration, on the other hand to avoid injury to the operator when disassembling the equipment. The bottom plate 108 and the top plate 101 are punched with holes and grooves for installing various parts, and the aluminum alloy back plate 106 and the triangular reinforcing rib improve the stability of the whole mechanism when performing impact and tightening actions. The straight light shaft 102 is connected to the back plate 106 by a T-shaped joint 103, mainly providing longitudinal support for the tightening mechanism. The base 105 is made of hard rubber material, which can effectively reduce the vibration generated during work.

[0028] Specifically, the tension and compression module, the unscrewing and tightening module, the hydraulic oil pumping and pumping module, and the display and control module specifically include: slide table 2, stepper motor 3, pressure sensor 4, U-shaped piece 5, support shaft 6, cover opening device 7, planetary gear reducer 8, brushless motor 9, linear bearing 10, small peristaltic oil pump 11, touch display screen 12, case 13 These components. One side of the slide table 2 is slidably connected with the back plate 106, the lower end of the slide table 2 is fixedly connected with the stepper motor 3 through a bolt, and the upper end of the slide table 2 is provided with a through hole, and the cylindrical sleeve on the upper end of the stepper motor 3 is arranged in the through hole on the upper end of the slide table 2. The upper end of the pressure sensor 4 is fixedly connected with the stepper motor 3 through a bolt, and the lower end of the pressure sensor 4 is fixedly connected with the upper end of the U-shaped piece 5 through a bolt. The upper end of the support shaft 6 is clamped on the T-shaped joint 103, and the lower end of the support shaft 6 is fixedly connected with the bottom plate 108 through a bolt. The two sides of the cover opening device 7 are respectively sleeved on the two light shafts 102 above, and the two sides of the cover opening device 7 are also provided with linear bearings 10 and are respectively sleeved on the two light shafts 102 above, and the upper end of the cover opening device 7 is provided with a planetary gear reducer 8 and a brushless motor 9. The upper end of the touch display screen 12 is fixedly connected with the top plate 101 through a bolt. The lower end of the case 13 is fixedly connected with the bottom plate 108 through a bolt. The small peristaltic oil pump 11 is fixedly arranged on one side of the case 13. The case 13 is provided with a control system and a power supply for the device.

[0029] Specifically, the cover opening device 7 includes a large gear 701, the large gear 701 is provided with a pin hole 702, the large gear 701 is provided with a small gear 703, and the small gear 703 is provided with a ball bearing 704; the surface of the large gear 701 has two pin holes 702, which are tightly matched with the end cover of the hydraulic damper by inserting a pin, thereby realizing the functions of unscrewing and tightening the end cover of the hydraulic damper. In addition, linear bearings 10 are arranged on both sides of the cover opening device 7 to meet the linear displacement of the end cover of the hydraulic damper during loosening and tightening.

[0030] The touch display screen 12 is electrically connected with the cabinet 13, and the control system in the cabinet 31 adopts an STM32 single-chip microcomputer as a main control chip. The STM32 single-chip microcomputer is responsible for receiving and processing signals from the sensor and the operation interface, and is used for controlling the work of the tension-compression module, the unscrewing and screwing module and the hydraulic oil pumping and injecting module.

[0031] Before the tension and compression detection is prepared to be carried out, the hydraulic damper to be detected is first inserted through the hole reserved for the large gear 701 in the cover opening device 7, and then the damper clamp groove 104 is connected with the hydraulic damper by using a pin, the damper clamp groove gap is too large, and a protective pad needs to be attached, and it is ensured that the positions of the two light shafts 102 are horizontal and parallel before connection. Then, the control system is operated to make the slide table 2 descend to a suitable position, that is, the pin hole 702 of the U-shaped piece 5 is inserted into the pin hole 702 at the top of the damper, and the pin is inserted, and the tooling is completed. Then, the detection work of the damper performance can be carried out.

[0032] When the tension-compression module works, the closed loop system composed of the stepper motor 3, the pressure sensor 4 and the control system provides a constant tension of 200N, and the slide table 2 connected with the stepper motor 3 drives the hydraulic damper piston rod to realize the ascending movement. In the running process, the real-time tension, the ascending distance and the response time are collected as output signals to judge whether the hydraulic damper reaches the required maintenance condition; at the same time, the real-time force feedback is used as the cut-off condition, and a threshold of 50N is left, and the stop condition is met when the threshold is exceeded. When the compression action is performed, the constant tension provided by the stepper motor 3 becomes a constant pressure, and the slide table 2 is lowered to drive the hydraulic damper piston rod to complete the contraction action. The 350N pressure value is used as the stop condition of the downward action, and when the condition is met, it is considered that the piston rod is pressed to the specified position, and the stretching detection can be carried out.

[0033] The stepper motor 3 is selected as the power unit, and the closed loop system composed of the stepper motor 3, the pressure sensor 4 and the control system has the advantages of high-precision position control capability, stable driving force, high response characteristics and high reliability. At the same time, the stepper motor 3 runs stably, and has low noise whether it runs at high speed or low speed. The electric drive has the advantages of simple structure and easy control compared with other control forms. The slide table 2 is used to drive the lifting movement, and the pressure sensor 4 on each side can ensure the position to be horizontal during the loading process, and then ensure the loading direction to be stable. At the same time, it can effectively ensure that the driving force and the loading speed are set. The vertical loading form can greatly save the space occupied by the whole machine, and is conducive to reducing the weight of the whole machine. The design of the U-shaped connecting buckle can simplify the installation and unloading process, and facilitate the operation of the staff.

[0034] When the installation is ready, after the pulling and pressing work, the two pins inserted into the joint bearing of the damper are removed, the light inside the U-shaped piece 5 is turned on, and the damper is held by the centering clamp for centering, facilitating the insertion of the pins into the pin holes on the end cover of the damper, the position of the pin holes in the large gear 701 is manually adjusted to align with the pin holes on the end cover of the damper, the two pins are inserted, and the cap opening device 7 can effectively cooperate with the end cover of the damper, and the entire installation process is completed.

[0035] When the unscrewing and screwing module is working, the unscrewing key is pressed to start the brushless motor 9, which drives the gear to rotate through the cooperation of the brushless motor 9 and the reducer. The touch screen 12 control interface is provided with a fast gear and a slow gear. The torque of the slow gear is larger, but the rotation speed is slower, and the termination condition is that the current is 0.4A or the opening time reaches 15s. When the slow unscrewing process is completed, the fast gear is adjusted to achieve fast unscrewing, and the termination condition is that the current is 1A or the time reaches 110s until the cap opening process is completed. When screwing, the screwing key of the control panel is pressed to start the brushless motor 9. The unscrewing and screwing module is provided with a fast gear and a slow gear. The termination condition of the fast gear is that the current is 0.55A or the time reaches 110s, and the termination condition of the slow gear is that the current is 0.13A until the screwing process is completed. In addition, the linear bearings 10 on both sides will move up and down accordingly. This movement is mainly used to meet the linear displacement generated during the rotation of the end cover to ensure that the entire process can be smoothly, stably and accurately carried out.

[0036] The unscrewing and screwing module has the following characteristics:

[0037] 1. The shaft hole cooperation is adopted, and any tool is not needed to easily complete the installation and disassembly;

[0038] 2. The gear transmission is mainly adopted, the transmission ratio is accurate and stable, the accurate rotation speed and torque transmission can be guaranteed, the high transmission efficiency can be achieved, the energy loss is reduced. The structure is relatively simple, the work is reliable, the service life is longer, and the working environment is suitable for a wide range;

[0039] 3. The linear bearings 10 are adopted on both sides to realize accurate linear motion, ensure the accuracy and stability of the operation of the unscrewing and screwing module, reduce the friction coefficient, reduce energy loss and wear. In addition, the movement process is more stable and smooth, reduces vibration and noise. The maintenance is simple, and the linear bearings 10 of the same specification have good interchangeability;

[0040] 4. The pin connection between the large gear 701 and the hydraulic damper is selected from a material with low hardness. When a large extrusion force is received, the pin is deformed in priority to avoid the extrusion deformation of the hole in the upper end cover;

[0041] 5. The module structure is simple, and needs less supporting parts, so the overall weight of the machine can be further reduced.

[0042] The pumping and injecting hydraulic oil module is mainly composed of two completely independent and separated small peristaltic pumps 11, which can avoid cross contamination in the pumping and injecting process.

[0043] When the pumping and injecting hydraulic oil module works, a 4mm diameter transparent pumping tube is inserted into the damper with the end cap unscrewed, and the pumping and injecting work is started by pressing the pumping and injecting keys on the control panel. The pumping and injecting paths are separated, which can significantly reduce the risk of cross contamination of hydraulic oil. The hydraulic oil entering the damper cannot exceed 7 / A according to the pollution level specified in GJB420B-2006. The filter has very high filtering capacity and sufficient capacity, which can fully meet the flow requirements and pollution requirements.

[0044] The control system in the display control module is divided into "installation / dismounting", "tension detection", "unscrewing / tightening", "hydraulic oil replacement" and "setting" five parts.

[0045] In use, the "installation / dismounting" sub-interface can control the stepper motor 3 and the brushless motor 9, that is, complete the lifting of the tension module and the loosening and tightening of the unscrewing and tightening module, and the interface provides a manual operation button to facilitate manual operation. The tension detection sub-interface provides buttons for hydraulic damper piston rod position initialization and pressure sensor 4 initialization. After initializing the system, click next to start the hydraulic damper piston rod tension detection step. The interface displays the stroke, force value and time data of the piston rod, so that the operator can judge whether the damper meets the maintenance conditions. In addition, the setting interface can modify the tension value of the stepper motor 3, and clicking next again will jump to the unscrewing / tightening control interface. The unscrewing / tightening control interface can also be directly entered from the main menu. In addition to the related control buttons, the interface also sets an overload prompt to prevent the motor from being damaged due to too long overload time. The hydraulic oil replacement interface displays the injection volume and pumping volume, so that the operator can real-time monitor the pumping and injecting process of the hydraulic oil.

[0046] In summary, after the hydraulic damper is installed on the maintenance device shown in the application, a constant force stretching test needs to be carried out according to the operation manual to determine whether it meets the use. If the stretching force is 200N, the time for the damper piston rod to be pulled from the lowest position to the highest position is between 11 to 13 seconds, it can be determined that the damper meets the use standard, then the damper can be directly removed for continuous use, otherwise the end cover can be unscrewed by the tightening device, the hydraulic oil is replaced for continuous testing until it meets the use standard, and the operation process needs to wear rubber gloves throughout the process.

[0047] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0048] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A hydraulic damper maintenance device, characterized in that, Includes a frame, tension / compression module, unscrewing / tightening module, hydraulic oil injection / extraction module, and display / control module; The frame includes a top plate, four optical axes, a T-joint, a damper clamp slot, a base, a back plate, triangular reinforcing ribs, and a bottom plate; the bottom plate has a base at its lower end and is fixedly connected by bolts, the bottom plate is fixedly connected to the lower ends of the two lower optical axes by bolts, and the upper ends of the two upper optical axes are fixedly connected to one end of the top plate by bolts. One end of the T-joint is fixedly connected to the back plate by bolts, and the other end is connected to the opposite ends of the upper and lower optical axes; the other end of the top plate is fixedly connected to the upper part of the back plate by bolts, and the lower end of the back plate is fixedly connected to the base by bolts; the short right-angled side of the triangular reinforcing rib is fixedly connected to the base plate by bolts, and the long right-angled side of the triangular reinforcing rib is fixedly connected to the back plate by bolts; the lower end of the damper clamp groove is fixedly connected to the base plate by bolts. The tensioning module, the unscrewing and tightening module, the hydraulic oil pumping module, and the display and control module specifically include: a slide table, a stepper motor, a pressure sensor, a U-shaped component, a support shaft, a cover opening device, a planetary gear reducer, a brushless motor, a linear bearing, a small peristaltic oil pump, a touch screen, and a chassis. One side of the slide table is slidably connected to the back plate, the lower end of the slide table is fixedly connected to the stepper motor by bolts, and the upper end of the slide table has a through hole, with the cylinder at the upper end of the stepper motor fitted into the through hole at the upper end of the slide table. The upper end of the pressure sensor is fixedly connected to the stepper motor with bolts, and the lower end of the pressure sensor is fixedly connected to the upper end of the U-shaped component with bolts; the upper end of the support shaft is clamped on the T-joint, and the lower end of the support shaft is fixedly connected to the base plate with bolts; two optical shafts are respectively sleeved on both sides of the cover opening device, and linear bearings are also provided on both sides of the cover opening device and respectively sleeved on the two optical shafts; a planetary gear reducer and a brushless motor are provided at the upper end of the cover opening device; the upper end of the touch screen is fixedly connected to the top plate with bolts; the lower end of the chassis is fixedly connected to the base plate with bolts; the small peristaltic oil pump is fixedly installed on one side of the chassis; The opening device includes a large gear with a pin hole, and a small gear is engaged with the large gear. A ball bearing is installed inside the small gear.

2. The hydraulic damper maintenance device as described in claim 1, characterized in that, The frame is mainly made of aluminum alloy profiles and No. 45 steel. The four optical axes are made of No. 45 steel, while the rest of the frame is made of aluminum alloy plates or profiles. The bottom plate and top plate are provided with holes and slots for mounting components. The four optical axes are connected to the back plate by T-joints. The base is made of hard rubber material.

3. The hydraulic damper maintenance device as described in claim 1, characterized in that, The touch screen is equipped with a control system, which uses an STM32 microcontroller as the main control chip. The touch screen is electrically connected to the main control chip.

4. The hydraulic damper maintenance device as described in claim 1, characterized in that, The boundaries of each component are rounded.

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