Mechanical seal assembly assembling system and using method thereof

Abstract

The invention relates to a mechanical seal assembly assembling system and a using method thereof, and belongs to the technical field of mechanical seal assembly.The system comprises a rotating disc type multi-station conveying mechanism, a movable ring feeding mechanism, a sealing ring assembling mechanism, a static ring feeding mechanism, a spring assembling mechanism, a press-fitting detection mechanism and a discharging mechanism, and the movable ring feeding mechanism, the sealing ring assembling mechanism, the static ring feeding mechanism, the spring assembling mechanism, the press-fitting detection mechanism and the discharging mechanism are sequentially arranged in the conveying direction. The sealing ring assembling mechanism comprises a bulging press-fitting assembly, a bulging head of the bulging press-fitting assembly is composed of a plurality of petals, a sealing ring can be evenly opened, an oil coating assembly can be selected, a press-fitting detection mechanism integrates a pressure sensor and a displacement sensor, a pressure-displacement curve is collected in real time through a controller and compared with a standard curve, and online full inspection of the assembling quality is achieved. According to the invention, full-automatic assembly and intelligent detection of the mechanical sealing assembly are realized, the damage to the sealing ring is effectively avoided, the assembly consistency and the product yield are improved, and a quality tracing function is achieved.

Description

Technical Field

[0001] This invention relates to the field of automated assembly equipment technology, and in particular to a mechanical seal assembly system and its usage method. Background Technology

[0002] Mechanical seals are precision components used for sealing rotating shafts and are widely used in mechanical equipment such as pumps, compressors, and agitators. A typical mechanical seal assembly usually includes multiple precision parts such as a rotating ring, a stationary ring, sealing rings (O-rings or bellows), and springs. The assembly accuracy between these parts directly affects the sealing performance and service life.

[0003] Currently, the assembly of mechanical seal components is mostly completed manually or semi-automatically. Manual assembly suffers from problems such as low efficiency, poor assembly quality consistency, and high labor intensity. In particular, the assembly of elastomer parts such as sealing rings is prone to twisting and damage due to uneven force, leading to seal failure.

[0004] To address the aforementioned issues, the industry has proposed various automated assembly solutions. For example, an assembly device for an integrated sealed bearing assembly, disclosed in CN117537000A, uses a telescopic pole to drive a fixed pad for pressure assembly of the bearing assembly. However, this device primarily targets the overall press-fitting of the bearing assembly and does not address the specific treatment of the sealing ring, leaving a risk of twisting during the installation of the elastic sealing ring.

[0005] Regarding the assembly of sealing rings, a device for pressing and assembling inner cylinder sealing rings, disclosed in CN20228060458U, includes an assembly mechanism, a feeding slide, and a detection mechanism, enabling automated installation of the sealing rings. However, the detection mechanism of this device is only used to determine whether the sealing ring is installed correctly, lacking real-time monitoring of the pressing process and failing to identify potential quality problems such as missing springs or twisted sealing rings. A high-efficiency, high-precision automatic assembly machine for pneumatic solenoid valve sealing rings addresses the assembly challenges of flat HNBR sealing rings by designing a specially structured expansion mechanism and a springback mechanism, and measuring the stress-strain curve of the sealing ring to determine the applied load. While this technology solves the morphological control problem of flat sealing rings, its detection process remains relatively simple and does not achieve comprehensive quality monitoring of the pressing process.

[0006] Regarding press-fitting process monitoring, CN1019370203A discloses a force and displacement monitoring device and method. This method compares the measured pressure-displacement curve with a standardized reference curve and outputs a control signal to regulate the press-fitting process. While this technology effectively monitors press-fitting quality, its application is relatively general and not optimized for the multi-layered structure of mechanical seal components (dynamic ring, sealing ring, stationary ring, spring), thus failing to identify the specific fault types of each component. CN1019370203A further proposes a press-fitting curve evaluation method based on an improved Fraser distance method, evaluating press-fitting quality through similarity calculations, but it still does not solve the problem of integration with the sealing ring assembly process.

[0007] In terms of system integration, a low-damage, continuously variable diameter sealing ring assembly device (publication number CN10201042869A) guides the sealing ring into the mounting groove by forming an inclined guide surface through multiple pneumatic release mechanisms. A sealing ring orientation identification assembly device (publication number CN202030202778035.9) adds visual recognition functionality. While these technologies offer innovations in certain aspects of sealing ring assembly, none achieve full-process integration of driven ring feeding, sealing ring assembly (including oiling), stationary ring feeding, spring assembly, press-fitting detection, and unloading and sorting. Furthermore, they lack the function of automatically sorting out defective products based on detection results.

[0008] In summary, the existing technology has the following shortcomings: 1. Twisting and damage are easily caused during the assembly of sealing rings, especially flat sealing rings; 2. Real-time quality monitoring is lacking during the press-fitting process, making it impossible to identify specific fault types; 3. The system integration is low, failing to achieve full automation from individual parts to finished product; 4. Automatic sorting of defective products and traceability of quality data are lacking. Therefore, it is necessary to develop a mechanical seal assembly system that can overcome the above shortcomings. Summary of the Invention

[0009] This invention provides a mechanical seal assembly system and its usage method, which solves the problems of low assembly efficiency, difficulty in installing sealing rings, and inability to monitor press-fit quality in real time in the prior art.

[0010] The solution of the present invention to the above-mentioned technical problems is as follows: On the one hand, a mechanical seal assembly system includes a rotary multi-station conveying mechanism, and a dynamic ring feeding mechanism, a sealing ring assembly mechanism, a stationary ring feeding mechanism, a spring assembly mechanism, a press-fit testing mechanism, and a discharge mechanism arranged sequentially around the rotary table along the conveying direction. The sealing ring assembly mechanism includes a sealing ring vibratory plate, a sealing ring transfer robot, and an expansion and pressing assembly. The expansion and pressing assembly includes an expansion head, an expansion drive unit for driving the expansion head to expand radially, and a pressing cylinder. The press-fitting detection mechanism includes a press-fitting head, a press-fitting drive unit for driving the press-fitting head to rise and fall, a pressure sensor mounted on the press-fitting drive unit, and a displacement sensor for detecting press-fitting displacement.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the rotary multi-station conveying mechanism includes an indexing turntable and multiple workpiece carriers evenly distributed along the circumference of the indexing turntable. The workpiece carriers are provided with positioning grooves that match the shape of the mechanical seal housing. The function of this structure is to provide precise positioning and a stable bearing base for the workpieces, ensuring that the workpieces maintain accurate position and posture when transferred between various processing stations. Its advantage is that, through the design of the contour positioning grooves, it can effectively prevent the workpieces from shifting or tilting during high-speed indexing, thereby improving the alignment accuracy and assembly consistency of subsequent assembly processes and reducing assembly defects caused by inaccurate positioning.

[0013] Furthermore, the expanding head includes multiple expanding petals evenly distributed circumferentially. The expanding drive unit is a conical mandrel or a cylinder-driven linkage mechanism. When the expanding drive unit is activated, it drives multiple expanding petals to expand radially synchronously. The function of this structure is to achieve uniform expansion of the sealing ring, so that its inner diameter can be expanded to a size that can be smoothly fitted into the dynamic ring sealing groove. Its advantage is that by adopting a multi-petal synchronous expansion method, it can ensure that the sealing ring is subjected to uniform force in the circumferential direction, avoiding local excessive stretching that could lead to deformation or damage. At the same time, the driving method of the conical mandrel or linkage mechanism is compact and reliable, and can achieve precise control of the expansion amount, ensuring the shape recovery and sealing performance of the sealing ring after installation.

[0014] Furthermore, the sealing ring assembly mechanism also includes a sealing ring oiling component, which includes an oil reservoir, an oil dispensing valve, and an oiling nozzle. This component is used to automatically apply grease before the sealing ring is installed. This function automatically completes the lubrication process before the sealing ring is assembled, reducing the frictional resistance between the sealing ring and the workpiece. Its advantage is that by replacing manual operation with automated oiling, it not only improves production efficiency but also ensures that the amount of oil applied is uniform. The application of grease can effectively prevent the sealing ring from twisting, cutting, or being damaged during the pressing process, and it also helps to improve the service life of the sealing ring and the sealing effect after assembly.

[0015] Furthermore, the press-fitting inspection mechanism also includes a controller, which is electrically connected to the pressure sensor, displacement sensor, and press-fitting drive unit. The controller is used to collect the pressure-displacement curve during the press-fitting process in real time and compare it with a preset standard curve to determine the press-fitting quality. This function monitors key process parameters in real time during the press-fitting process and performs intelligent quality judgment. Its advantage lies in achieving full inspection of the assembly process, enabling timely detection of quality problems such as abnormal press-fitting force, insufficient or excessive press-fitting depth, and preventing defective products from flowing into the next process. Through curve comparison, it can not only determine whether the product is qualified or not, but also provide data support for process optimization, improving the stability and traceability of the production process.

[0016] Furthermore, the unloading mechanism includes an unloading robot, a qualified product conveyor belt, and a non-qualified product collection box. The unloading robot sorts the products to the qualified product conveyor belt or the non-qualified product collection box according to the detection results of the pressing and testing mechanism. This function realizes the automatic classification and output of finished products, separating qualified products from non-qualified products according to the detection results. Its advantage is that it completely replaces manual sorting and avoids the risk of human misjudgment or mixing. At the same time, the automatic isolation of non-qualified products helps to conduct subsequent cause analysis and rework, ensuring that only products that meet the quality requirements enter the next stage or are packaged and shipped, thereby ensuring the overall quality level of the products leaving the factory.

[0017] Furthermore, both the moving ring feeding mechanism and the stationary ring feeding mechanism include a vibratory feeder, a direct vibration feeder, and a loading / unloading robot. The loading / unloading robot is equipped with a vacuum suction cup or pneumatic gripper at its end. This function enables automatic feeding and clamping of the moving and stationary ring workpieces. Its advantage lies in the fact that the vibratory feeder, in conjunction with the direct vibration feeder, can achieve automatic arrangement and directional conveying of workpieces, ensuring the continuity and consistency of feeding direction. The design of the vacuum suction cup or pneumatic gripper allows for flexible selection of the picking method according to the material and shape of the workpiece, avoiding damage to the precision machined surface and ensuring the stability and reliability of picking and placing materials, thereby improving the automation level and operating efficiency of the entire system.

[0018] On the other hand, a method of using a mechanical seal assembly system includes the following steps: S1, conveying the dynamic ring workpiece to the workpiece carrier of the rotary multi-station conveying mechanism through the dynamic ring feeding mechanism; S2, the turntable rotates to the sealing ring assembly station, the sealing ring removal robot picks up the sealing ring from the sealing ring vibrating plate, puts the sealing ring on the expansion head, the expansion drive unit drives the expansion head to expand radially to open the sealing ring, the pressing cylinder drives the expansion head to press down, and installs the sealing ring into the sealing groove of the moving ring. S3, the turntable rotates to the stationary ring loading station, and the stationary ring loading mechanism assembles the stationary ring workpiece onto the rotating ring that has been fitted with a sealing ring; S4, the turntable rotates to the spring assembly station, and the spring assembly mechanism installs the spring into the spring seat of the stationary ring; S5, the turntable rotates to the press-fitting inspection station, the press-fitting drive unit drives the press-fitting head to press down, press the stationary ring, spring and dynamic ring into a whole, and at the same time the pressure sensor and displacement sensor collect the pressure-displacement data in real time during the press-fitting process, and the controller judges whether the assembly is qualified based on the data. S6, the turntable rotates to the unloading station, and the unloading mechanism sorts and outputs the finished products according to the inspection results. Furthermore, in step S2, before the sealing ring is installed, a step of automatically applying grease to the sealing ring using a sealing ring oiling assembly is included. Before the sealing ring is installed into the dynamic ring sealing groove, a uniform layer of grease is automatically applied to its surface. By replacing traditional manual application with automated oiling, the production cycle is significantly improved, and the amount of grease applied to each sealing ring is precisely consistent, avoiding problems such as missed application, excessive application, or uneven application that may occur with manual operation. The lubricating effect of the grease can effectively reduce the frictional resistance between the sealing ring and the dynamic ring sealing groove, preventing damage such as twisting, edge cutting, or local excessive stretching of the sealing ring during the pressing process, thereby ensuring the integrity and elastic recovery ability of the sealing ring after assembly. In addition, the presence of grease also helps to improve the sealing effect of the sealing ring in the early stage of use and extend the overall service life of the mechanical seal. Furthermore, in step S5, the controller compares the real-time collected pressure-displacement curve with a preset standard curve. If the deviation exceeds a set threshold, it is determined to be a defective product, and the type of defect is recorded. During the pressing process, the controller processes the real-time data collected by the pressure sensor and displacement sensor to generate a pressure-displacement curve, and compares and analyzes it with the standard curve representing a qualified assembly process. Based on the degree of deviation, the product quality is automatically determined, and defective products are classified and recorded. This achieves full online inspection of each product, enabling timely detection of potential quality problems such as abnormal pressing force, insufficient or excessive pressing depth, missing or misaligned parts, etc., avoiding the lag and missed inspection risks of manual sampling. Through intelligent comparison with the standard curve, it can not only accurately determine whether the product is qualified or not, but also identify the specific type of defect based on the deviation characteristics (such as missing springs, stuck seals, etc.), providing accurate data support for subsequent process improvement and quality traceability. This closed-loop control method effectively improves the consistency and stability of the assembly process, ensuring the reliability and yield of the finished products.

[0019] The beneficial effects of this invention are as follows: This invention provides a mechanical seal assembly system and its usage method, which have the following advantages: 1. Improved assembly quality and consistency of sealing rings. By using an expansion head composed of multiple expansion petals and cooperating with a tapered mandrel or connecting rod mechanism to drive its synchronous radial expansion, the sealing ring is evenly expanded. This design ensures that the sealing ring is subjected to consistent force in the circumferential direction, avoids damage caused by local excessive stretching, and guarantees the shape recovery ability and sealing performance of the sealing ring after installation. 2. Reduced assembly friction and protected parts: An automatic grease application component was added before the sealing ring was installed. The grease was automatically applied to the sealing ring through the oil reservoir, grease dispensing valve and grease nozzle. This not only replaced manual grease application and improved efficiency, but more importantly, the grease effectively reduced the frictional resistance between the sealing ring and the dynamic ring sealing groove, prevented twisting and edge cutting during the pressing process, and extended the service life of the sealing ring. 3. Intelligent full inspection of the pressing process has been realized. The controller connects to pressure sensors and displacement sensors to collect and generate pressure-displacement curves in real time. These curves are compared with preset standard curves. This not only can timely detect surface problems such as abnormal pressing force and insufficient pressing depth, but also can identify specific fault types such as missing springs and stuck seals through curve deviation characteristics. This enables online quality judgment of each product and prevents the outflow of unqualified products. 4. Improved system automation integration and production efficiency. The rotary multi-station conveyor mechanism is integrated with the moving ring feeding, sealing ring assembly, stationary ring feeding, spring assembly, press-fit testing, and unloading mechanism in sequence along the circumference. Each feeding mechanism uses a vibratory feeder and a direct vibration feeder in conjunction with a vacuum suction cup or pneumatic gripper, realizing full-process automation from component feeding to finished product output, which greatly improves production cycle and assembly consistency. 5. The quality control and data traceability system has been improved. Based on the pressing test results, the unloading mechanism automatically sorts qualified and unqualified products into different areas through the unloading robot. This avoids the risk of misjudgment and mixing of materials due to manual sorting. On the other hand, the controller automatically records the types of unqualified products, providing accurate data support for subsequent process optimization and quality traceability, and ensuring the overall reliability and yield of the products leaving the factory. 6. High-precision positioning and stable transmission are guaranteed. The workpiece carrier on the turntable is equipped with a contour positioning groove that matches the shape of the mechanical seal, ensuring that the workpiece maintains a precise position and attitude during multi-station transfer. This provides a reliable positioning basis for subsequent high-precision assembly processes and effectively reduces assembly defects caused by inaccurate positioning.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a top-view structural diagram of a mechanical seal assembly system and its usage method according to an embodiment of the present invention. Figure 2 This is a frontal view of a mechanical seal assembly system and its usage method according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the bulging press assembly in a mechanical seal assembly system and its usage method provided in an embodiment of the present invention.

[0022] The attached diagram lists the components represented by each number as follows: 1. Rotary multi-station conveyor mechanism; 11. Indexing turntable; 102. Workpiece carrier; 2. Dynamic ring feeding mechanism; 201. Vibratory feeder; 202. Straight vibratory feeder; 203. Loading and unloading robot; 3. Sealing ring assembly mechanism; 301. Sealing ring vibratory feeder; 302. Sealing ring transfer robot; 303. Bulging and pressing assembly; 3031. Bulging head; 3032. Bulging drive unit; 3033. Pressing cylinder; 304. Sealing ring oiling assembly; 4. Stationary ring feeding mechanism; 5. Spring assembly mechanism; 6. Pressing detection mechanism; 601. Pressing head; 602. Pressing drive unit; 603. Pressure sensor; 604. Displacement sensor; 605. Controller; 7. Unloading mechanism; 701. Unloading robot; 702. Qualified product conveyor belt; 703. Unqualified product collection box. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-3 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terminology used herein includes, and / or encompasses, any and all combinations of one or more of the associated listed items.

[0025] Example 1: This example provides a mechanical seal assembly system, such as... Figure 1 and Figure 2 As shown, the system includes a rotary multi-station conveying mechanism 1, and multiple automatic stations arranged sequentially around the rotary table along the conveying direction, specifically including: a moving ring feeding mechanism 2, a sealing ring assembly mechanism 3, a stationary ring feeding mechanism 4, a spring assembly mechanism 5, a pressing and testing mechanism 6, and a discharging mechanism 7. Specifically, the rotary multi-station conveyor 1 includes an indexing turntable 101 and multiple workpiece carriers 102 evenly distributed along the circumference of the indexing turntable. The workpiece carriers 102 are provided with positioning grooves that match the shape of the mechanical seal housing, which are used to provide precise positioning and stable bearing for the workpieces to be assembled (such as rotating rings) and ensure that they maintain a consistent posture when transferred between various stations. like Figure 1 As shown, the dynamic ring feeding mechanism 2 and the static ring feeding mechanism 4 have similar structures, both including a vibratory feeder 201, a direct vibratory feeder 202, and a loading / unloading robot 203. The vibratory feeder 201 is used to organize the messy workpieces (dynamic ring or static ring) into a uniform direction and transport them to the picking position through the direct vibratory feeder 202. The end effector of the loading / unloading robot 203 can be selected from vacuum suction cups or pneumatic grippers according to the material of the workpiece to gently and reliably pick up the workpiece and place it on the workpiece carrier 102 of the turntable. like Figure 1 and Figure 3 As shown, the sealing ring assembly mechanism 3 is the key to ensuring high-quality installation of the sealing ring. It includes a sealing ring vibratory plate 301, a sealing ring transfer robot 302, and a bulging and pressing assembly 303. The bulging and pressing assembly 303 further includes a bulging head 3031, a bulging drive unit 3032 for driving the bulging head to expand radially, and a pressing cylinder 3033 for providing downward pressure. Preferably, such as Figure 3 As shown, the expansion head 3031 is composed of multiple expansion petals evenly distributed along the circumference. The expansion drive unit 3032 can be a conical mandrel or a linkage mechanism driven by a cylinder. When the expansion drive unit 3032 is activated, the conical mandrel moves downward, and its conical surface forces multiple expansion petals to expand outward radially in sync. This structure can evenly expand the sealing ring and avoid excessive local stress that could lead to deformation or damage. Furthermore, to prevent twisting during the pressing of the sealing ring, the sealing ring assembly mechanism 3 also includes a sealing ring oiling component 304. The component 304 includes an oil reservoir, an oil dispensing valve, and an oiling nozzle. Its position and action sequence are set to automatically apply a uniform layer of grease to the surface of the sealing ring after it is opened by the expansion head 3031 and before it is pressed into the moving ring. The spring assembly mechanism 5 can be a conventional spring pressing unit, such as including a spring vibratory plate, a spring separation mechanism and a pressing rod, for accurately pressing the spring into the spring seat of the stationary ring; like Figure 2 As shown, the pressing and testing mechanism 6 is the core to ensure the quality of the final product. It includes a pressing head 601, a pressing drive unit 602 (such as a servo electric cylinder or pneumatic cylinder) that drives the pressing head to rise and fall, a pressure sensor 603 installed on the pressing drive unit, and a displacement sensor 604 (such as a grating ruler or magnetic grating ruler) for detecting the displacement of the pressing head. Core control section: The mechanism also includes a controller 605, such as a PLC or industrial computer. The controller 605 is electrically connected to the pressure sensor 603, the displacement sensor 604 and the press-fitting drive unit 602 respectively. Its function is to collect the pressure and displacement values ​​in real time during the press-fitting process and generate a pressure-displacement curve. The controller 605 has pre-stored standardized pressure-displacement curves representing qualified assemblies. During the pressing process, the controller plots the measured curves in real time and compares them with the standard curves. Based on the deviation characteristics, different fault types can be identified: if the pressure value is significantly lower than the standard curve in the initial stage of pressing (the area with small displacement), it may be due to a missing spring or incorrect spring installation; if abnormal pressure fluctuations or spikes occur in the middle of pressing, it may be due to twisting or jamming of the sealing ring; if the final pressing displacement exceeds the allowable range, it may be due to out-of-tolerance parts or missing parts. The controller automatically records the non-conformity types based on these characteristics, facilitating subsequent analysis and traceability. Finally, as Figure 1 and Figure 2 As shown, the unloading mechanism 7 includes an unloading robot 701, a qualified product conveyor belt 702, and a non-qualified product collection box 703. The unloading robot 701 sorts the products to the corresponding areas according to the detection results of the pressing and testing mechanism 6.

[0026] This embodiment also provides a method for using the above-mentioned mechanical seal assembly system. Based on the system structure, this method achieves a fully automated assembly and testing process, specifically including the following steps: S1, Rotary ring feeding: The rotating ring feeding mechanism 2 is started, and its loading and unloading robot 203 picks up the material from the outlet of the vibratory plate 201 and accurately places the rotating ring workpiece on the workpiece carrier 102 of the turntable multi-station conveyor mechanism 1. S2, Sealing ring assembly (including oiling): The turntable rotates, sending the workpiece carrier 102 carrying the rotating ring to the sealing ring assembly station; The sealing ring removal robot 302 picks up the sealing ring vibratory plate 301 and puts a sealing ring onto the bulging head 3031 of the bulging and pressing assembly 303; The expansion drive unit 3032 (such as a conical mandrel) operates to drive multiple expansion flaps to expand radially synchronously, thereby evenly expanding the sealing ring; Preferably, before pressing, the sealing ring oiling assembly 304 is activated, and a layer of grease is automatically applied to the inner wall or surface of the already opened sealing ring through the oiling nozzle; Subsequently, the pressing cylinder 3033 drives the expanding head 3031 to press down, accurately installing the expanded and oiled sealing ring into the sealing groove of the moving ring. After that, the expanding drive unit 3032 resets, the expanding flap contracts, and the pressing cylinder 3033 drives the expanding head to retract. S3, stationary ring loading: The turntable rotates to the stationary ring loading station, and the stationary ring loading mechanism 4 uses its loading and unloading robot 203 to grab the stationary ring workpiece and assemble it above the moving ring that has been fitted with the sealing ring. S4, Spring Assembly: The turntable rotates to the spring assembly station, and the spring assembly mechanism 5 installs the spring into the spring seat of the stationary ring. S5, Press Fitting and Online Inspection: This is the most critical step in the entire process. The turntable delivers the semi-finished product with all parts assembled to the press fitting and inspection station. The press-fitting drive unit 602 drives the press-fitting head 601 to press down smoothly according to the preset program, pressing the stationary ring, spring and rotating ring into a tight mechanical seal assembly; During the pressing process, the pressure sensor 603 and the displacement sensor 604 acquire data in real time at high frequency and transmit the signal to the controller 605. The controller 605 plots the pressure-displacement curve in real time based on the received data. At the same time, it has a standard curve (or standard curve band) pre-stored in its internal memory, which is generated from a large amount of qualified product pressing data. Intelligent judgment: The controller 605 automatically compares the measured curve with the standard curve. If the deviation between the two curves (such as the pressure value at a specific displacement point, the slope of the curve, the peak pressure, etc.) is within the set threshold range, it is judged as a qualified product; if the deviation exceeds the threshold, it is judged as a non-qualified product. More importantly, the controller can also automatically record the non-qualified type based on the characteristics of the deviation (for example, low pressure in the initial pressing stage may indicate that the spring is missing, and pressure fluctuation in the middle stage may indicate that the seal is twisted), providing data support for subsequent process improvement. S6, Automatic unloading and sorting: The turntable rotates the finished products that have completed pressing and inspection to the unloading station; The unloading mechanism 7 receives the detection result signal from the controller 605, and the unloading robot 701 acts according to the signal: if the product is determined to be qualified, it is picked up and placed on the qualified product conveyor belt 702 and flows to packaging or the next process; if it is a defective product, it is picked up and placed in the defective product collection box 703 for further processing. In summary, the mechanical seal assembly system and its usage method provided in this embodiment of the invention effectively solve the problems of easy damage to the seal ring, inability to monitor the pressing quality online, and low degree of automation in traditional assembly methods through a highly integrated rotary multi-station layout, a unique sealing ring expansion and oiling structure, and an intelligent pressing and testing mechanism with real-time pressure-displacement curve comparison function. This system not only improves assembly efficiency and consistency, but also realizes comprehensive monitoring and data traceability of product quality, and has significant beneficial effects.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Content not described in detail in this specification is prior art known to those skilled in the art.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A mechanical seal assembly assembly system characterized by, The rotary table type multi-station conveying mechanism (1) and the dynamic ring loading mechanism (2), the sealing ring assembly mechanism (3), the static ring loading mechanism (4), the spring assembly mechanism (5), the press-fitting detection mechanism (6) and the unloading mechanism (7) arranged in sequence along the conveying direction around the rotary table are included. The sealing ring assembly mechanism (3) includes a sealing ring vibrating disc (301), a sealing ring moving and taking manipulator (302) and an expansion press-fitting assembly (303), the expansion press-fitting assembly (303) includes an expansion head (3031), an expansion drive unit (3032) for driving the expansion head to expand radially and a press-fitting cylinder (3033). The press-fitting detection mechanism (6) includes a press-fitting head (601), a press-fitting drive unit (602) for driving the press-fitting head to lift, a pressure sensor (603) mounted on the press-fitting drive unit and a displacement sensor (604) for detecting the press-fitting displacement. The use method includes the following steps: S1, the dynamic ring workpiece is conveyed to the workpiece carrier (102) of the rotary table type multi-station conveying mechanism (1) through the dynamic ring loading mechanism (2); S2, the rotary table is rotated to the sealing ring assembly station, the sealing ring moving and taking manipulator (302) takes the material from the sealing ring vibrating disc (301), the sealing ring is sleeved on the expansion head (3031), the expansion drive unit (3032) drives the expansion head to expand radially to make the sealing ring open, and the press-fitting cylinder (3033) drives the expansion head to press down, so that the sealing ring is installed into the sealing groove of the dynamic ring; S3, the rotary table is rotated to the static ring loading station, the static ring workpiece is assembled to the dynamic ring above which has been installed with the sealing ring through the static ring loading mechanism (4); S4, the rotary table is rotated to the spring assembly station, the spring is installed into the spring seat of the static ring through the spring assembly mechanism (5); S5, the rotary table is rotated to the press-fitting detection station, the press-fitting drive unit (602) drives the press-fitting head (601) to press down, so that the static ring, the spring and the dynamic ring are press-fitted into a whole, meanwhile, the pressure sensor (603) and the displacement sensor (604) collect the pressure-displacement data in the press-fitting process in real time, and the controller (605) judges whether the assembly is qualified according to the data; S6, the rotary table is rotated to the unloading station, and the finished products are classified and output according to the detection results through the unloading mechanism (7).

2. The mechanical seal assembly mounting system of claim 1, wherein, The rotary table type multi-station conveying mechanism (1) includes a dividing disc (11) and a plurality of workpiece carriers (102) which are uniformly distributed on the dividing disc, and the workpiece carrier (102) is provided with a positioning groove matched with the shape of the mechanical seal shell.

3. The mechanical seal assembly mounting system of claim 1, wherein, The expansion head (3031) includes a plurality of expansion petals which are uniformly distributed in the circumferential direction, and the expansion drive unit (3032) is a conical shaft or a connecting rod mechanism driven by a cylinder, when the expansion drive unit acts, a plurality of expansion petals expand radially synchronously.

4. The mechanical seal assembly mounting system of claim 1, wherein, The sealing ring assembly mechanism (3) further includes a sealing ring oiling assembly (304), the oiling assembly includes an oil storage tank, an oil injection valve and an oiling nozzle, which is used for automatically applying lubricating grease before the sealing ring is installed.

5. The mechanical seal assembly mounting system of claim 1, wherein, The press-fitting detection mechanism (6) further comprises a controller (605) electrically connected with the pressure sensor (603), the displacement sensor (604) and the press-fitting driving unit (602), for collecting the pressure-displacement curve in the press-fitting process in real time, comparing with the preset standard curve, and judging the press-fitting quality.

6. The mechanical seal assembly mounting system of claim 1, wherein, The discharging mechanism (7) comprises a discharging manipulator (701), a qualified product conveying belt (702) and an unqualified product collecting box (703), and the discharging manipulator sorts the products to the qualified product conveying belt or the unqualified product collecting box according to the detection result of the press-fitting detection mechanism.

7. The mechanical seal assembly mounting system of claim 1, wherein, The dynamic ring loading mechanism (2) and the static ring loading mechanism (4) both comprise a vibrating disc (201), a straight-vibration feeder (202) and an up-and-down loading manipulator (203), and the up-and-down loading manipulator is provided with a vacuum suction cup or a pneumatic clamping jaw at the tail end.

8. The mechanical seal assembly mounting system of claim 1, wherein, In the step S2, before the sealing ring is installed, the step of automatically smearing the grease on the sealing ring by a sealing ring grease smearing assembly (304) is further included.

9. The mechanical seal assembly mounting system of claim 1, wherein, In the step S5, the controller (605) compares the real-time collected pressure-displacement curve with the preset standard curve, if the deviation exceeds the set threshold, the product is determined as unqualified, and the unqualified type is recorded.

Images