Automatic mounting equipment for mechanical seal of submersible pump

Abstract

The invention discloses automatic mounting equipment and method for a mechanical seal of a submersible pump. The equipment comprises a main working table, a mounting mechanism and a conveying mechanism. The main working table is provided with a plurality of moving table assemblies used for fixing the submersible pump. According to the conveying mechanism, a static ring, a spring and a movable ring of a mechanical seal are arranged in sequence through a vibration conveying disc and a storage main groove, and automatic conveying of parts is achieved through an air expansion shaft and a blocking rod. According to the mounting mechanism, a split guide sleeve and a press-fitting sleeve are adopted to clamp a mechanical seal, the axis deviation between the guide sleeve and the output shaft of the submersible pump is automatically detected and corrected through a correction assembly, and press-fitting is completed after accurate centering is ensured. Full-process automatic installation of the mechanical seal is achieved, sealing face pollution and installation deviation caused by manual operation are effectively avoided, and the assembling quality, the sealing reliability and the production efficiency are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a submersible pump automatic installation equipment, in particular to a submersible pump mechanical seal automatic installation equipment. BACKGROUND

[0002] The submersible pump is widely used in deep well water lifting, farmland irrigation and other fields. The core sealing component of the submersible pump, i.e. the mechanical seal, is installed at the position where the pump shaft penetrates the motor shell, and is used to prevent water from entering the motor cavity and to ensure the long-term stable operation of the equipment. The mechanical seal is usually composed of static ring, dynamic ring, spring and other precision parts, and the installation quality of the mechanical seal directly affects the sealing performance and the service life of the water pump.

[0003] At present, the installation of the mechanical seal of the submersible pump mainly relies on manual operation. The assembly worker needs to sequentially sleeve each part on the pump shaft and press it into the installation groove. However, this process has the following disadvantages: first, during the process of holding and replacing parts and tools, the precision end faces of the dynamic ring and the static ring are easily contaminated by dirt or hard particles; these contaminants can scratch the sealing end face, resulting in leakage during operation. In order to clean the end face, the existing process needs to use cleaning agent for multiple times of spraying, which is low in efficiency and may cause secondary pollution during repeated holding and replacement. Second, due to the machining error of the submersible pump shell, the actual axis of the output shaft often deviates from the theoretical position, and manual installation is difficult to accurately center, which easily causes scratching between the parts and the installation groove, resulting in damage to the sealing ring or improper assembly.

[0004] Therefore, the existing manual installation method is not only low in efficiency and difficult to ensure cleaning effect, but also cannot meet the assembly requirements of high-precision centering, and an automatic and high-precision installation equipment is urgently needed to solve the above problems. SUMMARY

[0005] The present application aims to provide a submersible pump mechanical seal automatic installation equipment to improve the technical problem of contamination of the surface of the dynamic ring and the static ring in the existing manual installation of the mechanical seal in the submersible pump.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A submersible pump mechanical seal automatic installation equipment, comprising

[0008] A work console having a plurality of mobile table assemblies, and a submersible pump with a mechanical seal to be installed is fixed on the mobile table assemblies;

[0009] An installation mechanism clamping the mechanical seal to be installed, so that the mechanical seal is coaxial with the output shaft of the submersible pump, and the clamped mechanical seal is pressed into the installation groove of the submersible pump;

[0010] A conveying mechanism arranged on one side of the installation mechanism to arrange and feed the static ring, spring and dynamic ring of the mechanical seal into the installation mechanism in sequence.

[0011] Preferably, the conveying mechanism comprises a storage total groove, which is in the shape of a semi-circular ring and has parallelly arranged static ring storage grooves, spring storage grooves and dynamic ring storage grooves, the static ring storage grooves are connected with static ring vibration conveying plates, the spring storage grooves are connected with spring vibration conveying plates, the dynamic ring storage grooves are connected with dynamic ring vibration conveying plates, and the mechanism further comprises a telescopic cylinder A, a gas expansion shaft coaxial with the storage total groove is arranged on the telescopic rod of the telescopic cylinder A, the telescopic cylinder A is driven to extend, so that the gas expansion shaft sequentially passes through the dynamic ring, the spring and the static ring stored in the storage total groove.

[0012] Preferably, the front end of the gas expansion shaft is in the shape of a truncated cone with gradually reduced diameter.

[0013] Preferably, the rear end of the gas expansion shaft is coaxially connected with a blocking rod, the diameter of the blocking rod is greater than that of the gas expansion shaft and smaller than the inner diameter of the storage total groove.

[0014] Preferably, the mounting mechanism comprises a support, two groups of telescopic cylinders F are arranged below the support, the telescopic cylinders F are axially telescopic along the output shaft of the submersible pump, the two groups of telescopic cylinders F are respectively connected with telescopic cylinders B, the telescopic cylinders B can be axially telescopic perpendicular to the axis of the gas expansion shaft, the mechanism further comprises a guide sleeve and a press-fit sleeve, the guide sleeve is symmetrically split into two half guide sleeves along the axial direction, the half guide sleeves are connected with the telescopic rods of the telescopic cylinders B, the press-fit sleeve is symmetrically split into a half press-fit sleeve along the axial direction, the half press-fit sleeve is axially slidably arranged on the inner surface of the half guide sleeve, when the guide sleeve clamps the sealing assembly handed over by the conveying mechanism, the end surface of the half press-fit sleeve abuts against the end surface of the dynamic ring, the outer surface of one of the half press-fit sleeves is provided with an axially extending rack, a sliding slot A is formed in the other half press-fit sleeve, and the rack drives the driving part after passing through the sliding slot A.

[0015] Preferably, the half press-fit sleeves are symmetrically split into two half press-fit sleeves along the axial direction, and the half press-fit sleeves are symmetrically split into two half press-fit sleeves along the axial direction.

[0016] Preferably, the mounting mechanism further comprises a correction assembly, the correction assembly comprises an inclination detection part and a correction part, the inclination detection part comprises a plurality of stroke probes, the stroke probes are arranged in the form of at least two circles on the front end of the guide sleeve, and each circle of stroke probes has at least 3 stroke probes.

[0017] Preferably, the number of stroke probes in each circle is 4, and the stroke probes are uniformly distributed at an angle of 90°.

[0018] Preferably, the correction part is an electrically adjusted frame.

[0019] The application further discloses an automatic installation method of the mechanical seal of the submersible pump.

[0020] S0: Fix the submersible pump to be installed with mechanical seal on the mobile station assembly;

[0021] S1: System initialization and reference establishment;

[0022] S11. Set the theoretical zero point: In the control system, define the position of each axis of the electric adjustment frame as zero point (Tx=0, Ty=0, Tz=0, Rx=0, Ry=0) when the guide sleeve axis coincides with the theoretical installation axis, and this state is the preset posture of the guide sleeve;

[0023] S12. Move into position: The mobile station assembly fixes the submersible pump on the workbench, and the electric adjustment frame drives the guide sleeve to move to the theoretical zero point position;

[0024] S2: Measure the actual posture of the fixed output shaft;

[0025] S21. Probe extension and contact: The electric adjustment frame controls the guide sleeve to slowly advance along the Z axis, and then the double-turn travel probe at the front end of the guide sleeve extends radially, so that the probe contacts the cylindrical surface of the fixed submersible pump output shaft;

[0026] S22. Data acquisition: The system records the coordinates (xi, yi) and compression amount di of all probes;

[0027] S23. Data processing: Remove abnormal data: Identify and remove abnormal data caused by keyways and the like;

[0028] S24. Fit the center of the circle:

[0029] a. Use the effective data of A circle to fit the center of section A OA (XA, YA);

[0030] b. Use the effective data of B circle to fit the center of section B OB (XB, YB);

[0031] c. Solve the fixed shaft axis: The actual space axis of the fixed output shaft is uniquely determined by the two points OA and OB;

[0032] S3: Calculate the amount of adjustment required for the guide sleeve;

[0033] S31. Calculate how the guide sleeve needs to move to make its axis parallel and coaxial with the axis of the fixed output shaft;

[0034] a. Calculate the angular deviation (Rx, Ry);

[0035] The current measured angle between the axis of the submersible pump output shaft and the reference axis (Z axis) of the guide sleeve;

[0036] Formula:

[0037] Pitch angle deviation around the Y-axis: ;

[0038] Roll angle deviation around the X-axis: ;

[0039] b. Corrective action: To eliminate this deviation, the guide sleeve must be rotated in the opposite direction by an equal amount;

[0040] ;

[0041] ;

[0042] S32. Calculate the translation deviation (Tx, Ty, Tz);

[0043] a. Calculate the center offset of the fixed output shaft relative to the guide sleeve reference position;

[0044] formula:

[0045] The goal is to align the center of the guide sleeve with the center of the fixed axis. This target center is the midpoint Omid of the centers of the two circles A and B.

[0046] ;

[0047] ;

[0048] Correction action: The guide sleeve needs to be translated to compensate for this center offset;

[0049] ;

[0050] ;

[0051] Z-axis compensation (Tz): Due to the rotation of Rx and Ry, the center of the guide sleeve end face will move backward. At the same time, a safety distance S needs to be reserved for press fitting, so the Tz axis needs to be retracted.

[0052] (in The backward movement is caused by the rotation of Rx and Ry, and can be calculated using the small angle formula. (Estimation)

[0053] S4: Perform corrections and verifications;

[0054] S41. Command transmission: The travel probe sends the target pose command to the electric adjustment frame: (Txtarget,Tytarget,Tztarget,Rxtarget,Rytarget);

[0055] S42. Active correction: The electric adjustment frame drives the guide sleeve to move from the initial zero point pose to the new target pose. At this time, the axis of the guide sleeve is aligned with the axis of the fixed output shaft.

[0056] S43. Verification:

[0057] a. The guide sleeve moves forward again, and the probe makes a second contact measurement;

[0058] b. Repeat S2 and calculate the new angular deviation. and ;

[0059] c. Convergence Criterion: If and If the result is correct, the correction is successful. Otherwise, perform iterative fine-tuning according to the following calculation formula.

[0060] Iterative correction formula (kth iteration):

[0061] ;

[0062] ;

[0063] ;

[0064] ;

[0065] S5: Press-fitting;

[0066] After the correction is successful, the probe retracts, and the telescopic cylinder F drives the guide sleeve to perform press fitting along the aligned axis.

[0067] Compared with the prior art, the beneficial effects of the present invention are:

[0068] 1. This invention achieves full automation of the mechanical seal process from feeding and sorting to pressing by the coordinated operation of the conveying mechanism, the installation mechanism and the worktable. It completely avoids contamination of the stationary and dynamic ring end faces by hands or tools during manual installation, ensuring the cleanliness and integrity of the sealing surface from the source, and significantly improving the sealing reliability and service life of the product.

[0069] 2. The equipment integrates high-precision correction components, which can automatically detect and fit the actual spatial axis of the submersible pump output shaft through a stroke probe, and drive the electric adjustment frame to actively compensate for the position of the guide sleeve in multiple degrees of freedom, ensuring precise alignment between the installation axis and the output shaft axis. This function effectively overcomes the installation misalignment problem caused by parts machining errors, avoids damage to the mechanical seal by scraping against the mounting groove during the pressing process, and significantly improves assembly consistency and success rate.

[0070] 3. The overall equipment boasts an ingenious structural design and a high degree of automation. The conveying mechanism utilizes the cooperation of an air shaft and a blocking rod to achieve reliable part pickup and orderly feeding; the split guide sleeve and pressing sleeve design of the mounting mechanism, along with the pin engagement structure, ensures stable part clamping and achieves smooth and precise pressing actions. This significantly improves production efficiency, reduces reliance on skilled workers, and is suitable for large-scale mass production. Attached Figure Description

[0071] Figure 1 This is a schematic diagram of the structure of the present invention;

[0072] Figure 2 This is a structural diagram of the mobile station component;

[0073] Figure 3 This is a bottom view of the mobile station component;

[0074] Figure 4 This is a structural diagram of the installation mechanism;

[0075] Figure 5 This is an exploded view of the installation mechanism;

[0076] Figure 6 This is a schematic diagram of the conveying mechanism;

[0077] Figure 7 This is a schematic diagram of the structure of telescopic cylinder A and the air shaft;

[0078] Figure 8 This is a schematic diagram of the storage main slot structure;

[0079] Figure 9-1 This is the control logic of this solution. Figure 1 ;

[0080] Figure 9-2 This is the control logic of this solution. Figure 2 .

[0081] Reference numerals: 1. Main worktable; 11. Moving table assembly; 11a. Table plate; 11b. Fixed stop bar A; 11c. Fixed stop bar B; 11d. Slide rail B; 11e. Slide rail C; 11f. Movable stop bar A; 11g. Movable stop bar B; 11h. Telescopic cylinder D; 11i. Telescopic cylinder E; 12. Support frame; 13. Lead screw; 14. Transmission wheel; 15. Transmission belt; 16. Drive motor; 2. Mounting mechanism; 21. Bracket; 22. Telescopic cylinder B; 23. Guide sleeve; 23a. Semi-guide sleeve; 23b. Slide rail A; 24. 24a. Press-fit sleeve; 24b. Pin; 25. Rack; 26. Drive unit; 26a. Gear; 26b. Power motor; 27. Correction assembly; 27a. Tilt angle detection part; 271a. Stroke probe; 27b. Correction part; 3. Conveying mechanism; 31. Storage tank; 31a. Static ring storage tank; 31b. Spring storage tank; 31c. Dynamic ring storage tank; 32. Static ring vibrating conveyor plate; 33. Spring vibrating conveyor plate; 34. Dynamic ring vibrating conveyor plate; 35. Telescopic cylinder A; 36. Air shaft; 37. Stop bar. Detailed Implementation

[0082] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0083] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0084] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0085] like Figures 1-8The submersible pump mechanical seal automatic installation equipment shown includes a work platform 1. Multiple movable stage assemblies 11 are arranged on the work platform 1 for positioning and fixing the motor during mechanical seal installation.

[0086] A set of installation mechanisms 2 is provided on the side of the workbench 1. The installation mechanism 2 can clamp the mechanical seal to be installed, and after fitting it onto the output shaft of the submersible pump, press it into the installation groove of the submersible pump, thereby realizing the automatic installation of the mechanical seal.

[0087] Meanwhile, to improve the automation level of mechanical seal installation, this solution also includes a conveying mechanism 3. Located on the side of the installation mechanism 2 facing away from the submersible pump, the conveying mechanism 3 arranges the stationary ring, spring, and rotating ring that make up the mechanical seal in the correct installation sequence and then feeds them into the installation mechanism 2, thereby reducing the material preparation time of the installation mechanism 2 and decreasing reliance on manual labor.

[0088] Specifically, there are several methods to achieve automatic conveying of mechanical seals. This solution adopts the following methods: such as... Figures 6-8 As shown, the conveying mechanism 3 includes a storage tank 31. The storage tank 31 is generally in an open semi-circular shape, and its overall shape is inclined in a downward chord, allowing the mechanical seal to remain stable within the tank due to its own weight after entering. Figure 8 As shown, the main storage slot 31 is specifically composed of a stationary ring storage slot 31a, a spring storage slot 31b, and a moving ring storage slot 31c. The width of each of these three storage slots is 1mm larger than the axial length of the stored part, which ensures that the part can enter smoothly and also constrains the part through the slot walls, keeping the stationary ring, moving ring, etc., in an upright state.

[0089] In addition, the conveying mechanism 3 also includes a stationary ring vibrating conveyor disc 32 tangentially connected to the stationary ring storage tank 31a, a spring vibrating conveyor disc 33 tangentially connected to the spring storage tank 31b, and a dynamic ring vibrating conveyor disc 34 tangentially connected to the dynamic ring storage tank 31c. The components of the mechanical seal (stationary ring, spring, and dynamic ring) are placed into their respective vibrating conveyor discs, and after being arranged by the vibrating discs, they roll into their corresponding storage tanks in the required state. It should be noted that using a vibrating disc to arrange materials and achieve orderly conveying is a conventional technical method, and will not be elaborated upon in this solution.

[0090] After the stationary ring, spring, and moving ring enter the storage tank 31, they need to be extracted by relevant equipment and accurately transported to the installation mechanism 2 in front.

[0091] Specifically, a telescopic cylinder A35 is installed on the side of the storage tank 31 facing away from the submersible pump. The telescopic rod of the telescopic cylinder A35 can extend and retract along the axis of the storage tank 31. A section of air shaft 36 is coaxially connected to the end of the telescopic rod. When the air shaft 36 is not inflated, its diameter is smaller than the inner diameter of the stationary ring, spring, and rotating ring, allowing the air shaft 36 to pass smoothly through these parts under the drive of the telescopic cylinder A35. When the air shaft 36 is inflated, the air blocks on its surface protrude radially and press against the inner side of the parts. At this time, the parts are lifted and removed from the storage tank 31. The telescopic cylinder A35 is then driven to extend axially again, which moves the parts out of the storage tank 31 and into the installation mechanism 2.

[0092] Preferably, to ensure that the air shaft 36 passes smoothly through the part, its front end is designed as a frustum-shaped cone with a gradually decreasing diameter.

[0093] Furthermore, it should be noted that this solution uses a vibratory feeder to transport materials, and a large number of parts will be stored in the guide groove connecting the vibratory feeder and the storage tank 31. When the air shaft 36 removes the parts from the storage tank 31, the parts in the guide groove will roll into the storage tank due to gravity. If the parts are not restrained, they may interfere with or collide with the air shaft 36 when it resets, which may damage the parts or even deform the storage tank 31 or the air shaft 36, affecting the normal operation of the equipment. Existing technologies typically use gate or rack and pinion stepping structures to control the order in which parts enter, but these methods have low reliability and require additional automation components and equipment costs.

[0094] Therefore, this solution is as follows Figure 7 As shown, a coaxial blocking rod 37 is installed behind the air shaft 36 to prevent parts from entering the storage slot 31 during the forward extension of the air shaft 36. The diameter of the blocking rod 37 is not less than the minimum diameter of the air shaft 36, but less than the inner diameter of the storage slot 31, and its length is not less than the extension stroke of the air shaft 36 conveying the parts. After the air shaft 36 passes through the storage slot 31, the blocking rod 37 enters the slot, and the outer edge of the parts in the guide slot abuts against the surface of the blocking rod 37 and cannot enter the storage slot 31. When the air shaft 36 returns to its original position, it will not interfere with parts that have not entered the slot.

[0095] After the orderly preparation and transportation of the parts are completed, these parts need to be clamped and installed.

[0096] like Figure 4 , Figure 5As shown, the mounting mechanism 2 includes a bracket 21 located on the side of the workbench 1. Two sets of telescopic cylinders F28 are mounted below the bracket 21. These two sets of telescopic cylinders F28 can extend axially along the output shaft of the submersible pump. The two sets of telescopic cylinders F28 are respectively connected to telescopic cylinders B22, which can extend and retract in a direction perpendicular to the axis of the air expansion shaft 36. A guide sleeve 23 and a press-fit sleeve 24 are also provided. The guide sleeve 23 is coaxially arranged with the air expansion shaft 36 and is cut in half along the axis to form two symmetrical semi-guide sleeves 23a, which are respectively connected to the corresponding telescopic cylinders B22. By controlling the extension and retraction of the telescopic cylinders B22, the opening and closing of the guide sleeve 23 can be achieved. The inner diameter of the guide sleeve 23 is adapted to the outer diameter of the stationary ring and the rotating ring in the mechanical seal, so that the parts conveyed by the air expansion shaft 36 can be clamped by the closed guide sleeve 23. Additionally, it should be noted that the spring, as a component between the stationary and rotating rings, will be located between the annular areas of the rotating and stationary rings due to its dimensional characteristics when not subjected to external force, and will not interfere with the press-fitting of the mechanical seal.

[0097] The press-fit sleeve 24 is installed inside the guide sleeve 23 and can slide along the axial direction of the guide sleeve 23 when installing the mechanical seal, thereby pressing the mechanical seal held by the guide sleeve 23 into the mounting groove of the submersible pump.

[0098] Specifically, the press-fit sleeve 24 is cut in half along its axis to form two semi-press-fit sleeves 24a, which are coaxially attached to the inner walls of their respective semi-guide sleeves 23a. The semi-press-fit sleeves 24a are slidably connected to the inner surface of the semi-guide sleeves 23a via axial slide rails. When the semi-press-fit sleeves 24a are subjected to axial force, they can slide axially within the guide sleeves 23. Figure 5 As shown, an axial groove A23b is formed on one of the semi-guide sleeves 23a, and a rack 25 is provided on the outer surface of the corresponding semi-press-fit sleeve 24a. The rack 25 extends axially and passes through the groove A23b. A drive unit 26 is mounted on the semi-guide sleeve 23a, including a gear 26a meshing with the rack 25 and a power motor 26b coaxially connected to the gear 26a. When it is necessary to press the mechanical seal into the mounting groove, the power motor 26b is started, which drives the press-fit sleeve 24a to move towards the mounting groove, thereby pressing the mechanical seal into the groove.

[0099] It should be noted that the inner diameter of the press sleeve 24 should be larger than the diameter of the submersible pump output shaft to ensure that the output shaft can pass smoothly during press fitting.

[0100] Furthermore, during the pressing process, the two semi-pressing sleeves 24a originally relied solely on the friction of their contact surfaces to achieve synchronous movement. This method is unstable and prone to relative movement between the two. To improve this situation, such as... Figure 5 As shown, several pins 24b are evenly distributed on the parting surface of one of the half-press sleeves 24a, while a matching groove is formed on the other parting surface. When the two half-press sleeves 24a are closed, the pins 24b are inserted into the groove to achieve engagement between them and enhance synchronization.

[0101] In some implementations, due to machining accuracy issues, after the submersible pump housing is fixed on the moving platform assembly 11, the extension direction of its output shaft may deviate angularly from the theoretical axis required for assembly. If this deviation is greater than 0.5°, and the guide sleeve 23 is not adjusted, forcibly fitting the mechanical seal onto the output shaft and pressing it into the groove will cause the outer edges of the stationary and rotating rings to rub against the mounting groove wall, resulting in damage and deformation of the parts. This not only affects the sealing effect but may even cause the submersible pump to malfunction. Therefore, this solution needs to be able to fine-tune according to the state of the output shaft of each submersible pump, so that the deflection angle between the guide sleeve 23 and the output shaft is less than 0.5°.

[0102] like Figure 5 As shown, the mounting mechanism 2 also includes a correction component 27, comprising a tilt angle detection part 27a and a correction part 27b. The tilt angle detection part 27a is used to detect the deflection angle between the output shaft and the mounting mechanism 2, while the correction part 27b is used to adjust the mounting mechanism 2 to make it coaxial with the output shaft again.

[0103] The tilt detection section 27a includes several travel probes 271a, which are arranged in a spoke-like pattern at the front end of the guide sleeve 23 and are distributed in at least two parallel concentric rings, with at least three probes in each ring. By using at least two travel probes 271a on the same axis as a group, the deviation between the output shaft axis and the guide sleeve 23 axis is accurately calculated using a plane fitting method, providing a basis for the correction section 27b.

[0104] It should be noted that in some embodiments, the probe may enter the keyway of the output shaft when it extends. To avoid this affecting the measurement, this design uses four travel probes 271a per revolution, evenly distributed at a 90° angle. This way, even if one set of probes causes data deviation due to entering the keyway, the accuracy of the deviation calculation can still be guaranteed by relying on the other three sets of data.

[0105] like Figure 5 As shown, the correction part 27b includes a connection to the electric adjustment frame (such as a five- or six-degree-of-freedom electric adjustment frame from Futansch; the telescopic cylinder B can be fully driven after being connected to the standardized electric adjustment frame port through design). When the tilt detection part 27a inputs the detection data into the electric adjustment frame, the adjustment frame will make corresponding angle adjustments so that the angle between the axis of the guide sleeve 23 and the axis of the output shaft is less than 0.5°, thereby ensuring that the stationary ring and the moving ring will not rub against the groove wall during subsequent pressing.

[0106] It should be mentioned that the workbench 1 of the present invention includes a longitudinally extending support frame 12. Two horizontally extending lead screws 13 are arranged parallel to each other on the frame, and transmission wheels 14 are respectively mounted on the same side end of the lead screws. A transmission belt 15 is wound around the two transmission wheels 14, and the two lead screws 13 rotate synchronously through the cooperation of the belt. In some embodiments, the transmission wheels 14 and the transmission belt 15 can be in the form of gears and gear belts to improve stability. One of the transmission wheels 14 is also coaxially connected to a drive motor 16, which serves as a power source to drive the lead screw 13 to rotate. Figures 1-3 As shown, a movable platform assembly 11 is mounted on two lead screws 13 and driven by them. After the submersible pump with the mechanical seal to be installed is hoisted onto this assembly, it can achieve self-pre-tightening fixation. Specifically, the movable platform assembly 11 includes a platform plate 11a, the bottom of which is screwed to the two lead screws 13. When the lead screws 13 rotate, the platform plate 11a can move along the lead screw axis. The upper surface of the platform plate 11a is provided with fixed stop bars A11b and B11c, which are arranged at right angles to fit against the side of the submersible pump base. Simultaneously, the platform plate 11a is also provided with movable stop bars A11f and B11g, wherein the movable stop bar A11f is parallel to the fixed stop bar A11b, and the movable stop bar B11g is parallel to the fixed stop bar B11c. The platform 11a has sliding grooves B11d and C11e, where sliding groove B11d is perpendicular to the fixed stop bar A11b, and sliding groove C11e is perpendicular to the fixed stop bar B11c. The lower surface of the platform 11a is equipped with telescopic cylinders D11h and E11i. Telescopic cylinder D11h is fixedly connected to the movable stop bar A11f and can be driven to move closer to or away from the fixed stop bar A11b; telescopic cylinder E11i is fixedly connected to the movable stop bar B11g and can be driven to move closer to or away from the fixed stop bar B11c.

[0107] It should be noted that this solution also discloses the automatic installation steps for mechanical seals with correction functions, such as... Figure 9-1 , Figure 9-2 As shown, it specifically includes:

[0108] S0: Secure the submersible pump to be installed with the mechanical seal onto the mobile platform assembly;

[0109] S1: System Initialization and Baseline Establishment

[0110] S11. Setting the theoretical zero point: In the control system, the position of each axis of the electric adjustment frame is defined as the zero point (Tx=0,Ty=0,Tz=0,Rx=0,Ry=0) when the guide sleeve axis coincides with the theoretical installation axis. This state is the preset posture of the guide sleeve.

[0111] S12. Positioning: The moving stage assembly secures the submersible pump to the worktable. The electric adjustment frame drives the guide sleeve to move to the theoretical zero point position.

[0112] S2: Measure the actual attitude of the fixed output shaft

[0113] S21. Probe Extension and Contact: The electric adjustment frame controls the guide sleeve to advance slowly along the Z-axis. Subsequently, the double-stroke probe at the front end of the guide sleeve extends radially, bringing the probe into contact with the cylindrical surface of the fixed submersible pump output shaft.

[0114] S22. Data Acquisition: The system records the coordinates (xi, yi) and compression amount di of all probes.

[0115] S23. Data Processing: Remove Abnormal Data: Identify and remove abnormal data caused by keyways, etc.

[0116] S24. Fitting the center of the circle:

[0117] a. Fit the center OA(XA,YA) of section A using valid data from circle A.

[0118] b. Fit the center OB(XB,YB) of section B using the valid data of circle B.

[0119] c. Solving for the fixed axis: The actual spatial axis of the fixed output axis is uniquely determined by two points, OA and OB.

[0120] S3: Calculate the amount of adjustment required for the guide sleeve.

[0121] S31. Calculate how the guide sleeve needs to move so that its axis is parallel and coaxial with the axis of the fixed output shaft.

[0122] a. Calculate the angular deviation (Rx, Ry)

[0123] The angle between the currently measured output shaft axis of the submersible pump and the reference axis (Z-axis) of the guide sleeve.

[0124] formula:

[0125] Pitch angle deviation around the Y-axis: ;

[0126] Roll angle deviation around the X-axis: ;

[0127] b. Corrective action: In order to eliminate this deviation, the guide sleeve must be rotated in the opposite direction by an equal amount.

[0128] ;

[0129] ;

[0130] S32. Calculate the translational deviations (Tx, Ty, Tz).

[0131] a. Calculate the center offset of the fixed output shaft relative to the guide sleeve reference position.

[0132] formula:

[0133] The goal is to align the center of the guide sleeve with the center of the fixed axis. This target center is Omid, the midpoint between the centers of circles A and B.

[0134] ;

[0135] ;

[0136] Correction action: The guide sleeve needs to be translated to compensate for this center offset.

[0137] ;

[0138] ;

[0139] Z-axis compensation (Tz): Due to the rotation of Rx and Ry, the center of the guide sleeve end face will move backward. At the same time, a safety distance S needs to be reserved for press-fitting. Therefore, the Tz axis needs to be retracted.

[0140] (in The backward movement is caused by the rotation of Rx and Ry, and can be calculated using the small angle formula. (Estimation)

[0141] S4: Perform corrections and verifications

[0142] S41. Command transmission: The travel probe sends the target pose command to the electric adjustment frame: (Txtarget,Tytarget,Tztarget,Rxtarget,Rytarget).

[0143] S42. Active Correction: The electric adjustment frame drives the guide sleeve to move from the initial zero-point pose to the new target pose. At this time, the axis of the guide sleeve is aligned with the axis of the fixed output shaft.

[0144] S43. Verification:

[0145] a. The guide sleeve moves forward again, and the probe makes a second contact measurement.

[0146] b. Repeat S2 and calculate the new angular deviation. and .

[0147] c. Convergence Criterion: If and If the result is correct, the correction is successful. Otherwise, perform iterative fine-tuning according to the following calculation formula.

[0148] Iterative correction formula (kth iteration):

[0149] ;

[0150] ;

[0151] ;

[0152] ;

[0153] S5: Press-fitting

[0154] After the correction is successful, the probe retracts, and the telescopic cylinder F drives the guide sleeve to perform press fitting along the aligned axis.

[0155] As can be seen from the above steps, the deviation angle between the guide sleeve axis and the submersible pump output shaft axis after adjustment will be less than 0.5°. At this time, the mechanical seal held by the guide sleeve can be pressed into the submersible pump's press-fit groove by the press-fit sleeve.

[0156] Working principle:

[0157] Workbench 1: The operator hoists the submersible pump with the mechanical seal to be installed onto the moving platform assembly 11. After fine-tuning the submersible pump's status, the operator activates the telescopic cylinders D11h and E11i, driving the movable stop bars A11f and B11g to move towards the corresponding fixed stop bars, thereby guiding and clamping the submersible pump. After completion, the drive motor 16 starts, driving the lead screw 13 to rotate, moving the submersible pump on the moving platform assembly 11 to the position of the installation mechanism 2. At this time, the submersible pump output shaft is basically coaxial with the guide sleeve 23 of the installation mechanism 2.

[0158] Conveying Mechanism 3: Telescopic cylinder A35 extends, driving air shaft 36 to insert into the mechanical seal part in the storage tank 31. After air shaft 36 expands, it lifts the part away from the storage tank 31. Then, telescopic cylinder A35 continues to extend, conveying the part between the opened guide sleeves 23. Next, the two semi-guide sleeves 23a close under the drive of telescopic cylinder B22, clamping the part. Air shaft 36 then retracts, leaving the part in the guide sleeves 23. It should be noted that during the retraction of air shaft 36, the blocking rod 37 will prevent subsequent parts from entering the storage tank 31; only after air shaft 36 has completely retracted will the part roll into the tank, preparing for the next conveying.

[0159] Installation mechanism 2: After the mechanical seal is clamped by the guide sleeve 23, there are two situations:

[0160] Ideally, the submersible pump output shaft is coaxial with the guide sleeve 23. Driven by the telescopic cylinder F, the guide sleeve 23 moves towards the output shaft, causing the mechanical seal to fit onto the shaft. Once the end face of the guide sleeve 23 contacts the submersible pump, the press-fit sleeve 24 moves axially under the drive of the drive unit 26, pressing the mechanical seal into the mounting groove.

[0161] Deviation exists: Due to machining errors, the output shaft and the guide sleeve 23 axis do not coincide. At this point, the correction assembly 27 is activated. The correction section 27b first advances the guide sleeve 23 so that its front end fits onto the front end of the output shaft. Then, the stroke probe 271a extends to measure. After data acquisition, the correction section 27b adjusts the angle of the guide sleeve 23 according to a preset program. After correction is complete, the telescopic cylinder F actuates, driving the guide sleeve 23 to fit onto the output shaft, and performing the installation and pressing of the mechanical seal.

[0162] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic installation device for a submersible pump mechanical seal, characterized in that: include The workbench (1) has multiple moving platform assemblies (11), and the submersible pump to be installed with the mechanical seal is fixed on the moving platform assembly (11); The mounting mechanism (2) clamps the mechanical seal to be installed so that the mechanical seal is coaxial with the output shaft of the submersible pump and presses the clamped mechanical seal into the mounting groove of the submersible pump. The conveying mechanism (3) is located on one side of the installation mechanism (2) to arrange the stationary ring, spring and rotating ring of the mechanical seal in sequence and send them into the installation mechanism (2).

2. The automatic installation device for a submersible pump mechanical seal as described in claim 1, characterized in that: The conveying mechanism (3) includes a storage main trough (31), which is semi-circular and has parallel arranged stationary ring storage trough (31a), spring storage trough (31b) and moving ring storage trough (31c). The stationary ring storage trough (31a) is connected to the stationary ring vibrating conveyor disk (32), the spring storage trough (31b) is connected to the stationary ring vibrating conveyor disk (33), and the moving ring storage trough (31c) is connected to the moving ring vibrating conveyor disk (34). It also includes a telescopic cylinder A (35), on which a pneumatic shaft (36) coaxial with the storage main trough (31) is provided, driving the telescopic cylinder A (35) to extend so that the pneumatic shaft (36) passes sequentially through the moving ring, spring and stationary ring stored in the storage main trough (31).

3. The automatic installation device for a submersible pump mechanical seal as described in claim 2, characterized in that: The front end of the air shaft (36) is a frustum-shaped cone with a gradually decreasing diameter.

4. The automatic installation device for a submersible pump mechanical seal as described in claim 2, characterized in that: The rear end of the air shaft (36) is coaxially connected to the blocking rod (37), and the diameter of the blocking rod (37) is larger than the diameter of the air shaft (36) and smaller than the inner diameter of the storage tank (31).

5. The automatic installation device for a submersible pump mechanical seal as described in claim 1, characterized in that: The installation mechanism (2) includes a bracket (21), under which two sets of telescopic cylinders F (28) are arranged. The telescopic cylinders F (28) extend and retract axially along the output shaft of the submersible pump. The two sets of telescopic cylinders F (28) are respectively connected to telescopic cylinders B (22). The telescopic cylinders B (22) can extend and retract perpendicular to the axis of the air expansion shaft (36). It also includes a guide sleeve (23) and a press-fit sleeve (24). The guide sleeve (23) is symmetrically cut along the axial direction to form two semi-guide sleeves (23a). The semi-guide sleeves (23a) are connected to the telescopic cylinders B (22). On the telescopic rod, the press-fit sleeve (24) is symmetrically cut along the axial direction to form a semi-press-fit sleeve (24a). The semi-press-fit sleeve (24a) is axially slidably disposed on the inner surface of the semi-guide sleeve (23a). The end face of the semi-press-fit sleeve (24a) abuts against the end face of the moving ring held by the semi-guide sleeve (23a). An axially extending rack (25) is provided on the outer surface of one of the semi-press-fit sleeves (24a). A sliding groove A (23b) is opened on one of the semi-guide sleeves (23a). The rack (25) drives the drive unit (26) after passing through the sliding groove A (23b).

6. The automatic installation device for a submersible pump mechanical seal as described in claim 5, characterized in that: Pins (24b) are evenly distributed on the axial parting surface of one of the half-press sleeves (24a). After the two half-press sleeves (24a) are engaged, the pins (24b) are inserted into the other half-press sleeve (24).

7. The automatic installation device for a submersible pump mechanical seal as described in claim 5, characterized in that: The installation mechanism (2) further includes a correction component (27), which includes an inclination detection part (27a) and a correction part (27b). The inclination detection part (27a) includes a plurality of travel probes (271a). The travel probes (271a) are arranged in parallel rings around the front end of the guide sleeve (23) in at least two rings. Each ring of travel probes (271a) has at least 3 probes.

8. The automatic installation device for a submersible pump mechanical seal as described in claim 7, characterized in that: The number of probes (271a) per revolution is 4, and they are evenly distributed at a 90° angle.

9. The automatic installation device for a submersible pump mechanical seal as described in claim 8, characterized in that: The correction part (27b) is a degree electric adjustment frame.

10. An automatic installation method for a mechanical seal, characterized in that: The automatic installation equipment for the submersible pump mechanical seal as described in claim 9 is adopted, and the specific steps include: S0: Secure the submersible pump to be installed with the mechanical seal onto the mobile platform assembly; S1: System initialization and baseline establishment; S11. Setting the theoretical zero point: In the control system, when the guide sleeve axis coincides with the theoretical installation axis, the position of each axis of the electric adjustment frame is defined as the zero point (Tx=0,Ty=0,Tz=0,Rx=0,Ry=0). This state is the preset posture of the guide sleeve. S12. Moving and positioning: The moving table assembly fixes the submersible pump on the worktable, and the electric adjustment frame drives the guide sleeve to move to the theoretical zero point position; S2: Measure the actual posture of the fixed output shaft; S21. Probe extension and contact: The electric adjustment frame controls the guide sleeve to slowly advance along the Z-axis. Subsequently, the double-stroke probe at the front end of the guide sleeve extends radially, so that the probe contacts the cylindrical surface of the fixed submersible pump output shaft. S22. Data Acquisition: The system records the coordinates (xi, yi) and compression amount di of all probes; S23. Data Processing: Removing Abnormal Data: Identify and remove abnormal data caused by keyways, etc. S24. Fitting the center of the circle: a. Fit the center OA(XA,YA) of section A using the valid data from circle A; b. Fit the center OB(XB,YB) of section B using the valid data of section B; c. Solving for the fixed axis: The actual spatial axis of the fixed output axis is uniquely determined by two points, OA and OB; S3: Calculate the amount of adjustment required for the guide sleeve; S31. Calculate how the guide sleeve needs to move so that its axis is parallel and coaxial with the axis of the fixed output shaft; a. Calculate the angular deviation (Rx, Ry); The angle between the currently measured output shaft axis of the submersible pump and the reference axis (Z-axis) of the guide sleeve; formula: Pitch angle deviation around the Y-axis: ; Roll angle deviation around the X-axis: ; b. Corrective action: To eliminate this deviation, the guide sleeve must be rotated in the opposite direction by an equal amount; ； ； S32. Calculate the translation deviation (Tx, Ty, Tz); a. Calculate the center offset of the fixed output shaft relative to the guide sleeve reference position; formula: The goal is to align the center of the guide sleeve with the center of the fixed axis. This target center is the midpoint Omid of the centers of the two circles A and B. ； ； Correction action: The guide sleeve needs to be translated to compensate for this center offset; ； ； Z-axis compensation (Tz): Due to the rotation of Rx and Ry, the center of the guide sleeve end face will move backward. At the same time, a safety distance S needs to be reserved for press fitting, so the Tz axis needs to be retracted. (in The backward movement is caused by the rotation of Rx and Ry, and can be calculated using the small angle formula. (Estimation) S4: Perform corrections and verifications; S41. Command transmission: The travel probe sends the target pose command to the electric adjustment frame: (Txtarget,Tytarget,Tztarget,Rxtarget,Rytarget); S42. Active correction: The electric adjustment frame drives the guide sleeve to move from the initial zero point pose to the new target pose. At this time, the axis of the guide sleeve is aligned with the axis of the fixed output shaft. S43. Verification: a. The guide sleeve moves forward again, and the probe makes a second contact measurement; b. Repeat S2 and calculate the new angular deviation. and ; c. Convergence Criterion: If and If the result is correct, the correction is successful; otherwise, iterative fine-tuning is performed according to the following calculation formula. Iterative correction formula (kth iteration): ； ； ； ； S5: Press-fitting; After the correction is successful, the probe retracts, and the telescopic cylinder F drives the guide sleeve to perform press fitting along the aligned axis.

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