Automatic installation equipment for mechanical seal of submersible pump

Abstract

The application discloses a kind of submersible pump mechanical seal automatic installation equipment and method.The equipment includes work general table, installation mechanism and conveying mechanism.Work general table is equipped with multiple mobile station components for fixing submersible pump;Conveying mechanism arranges static ring, spring and dynamic ring of mechanical seal in order by vibration conveying disc and storage general tank, and realizes the automatic conveying of parts by gas expansion shaft and blocking rod;Installation mechanism clamps mechanical seal using split guide sleeve and press fitting sleeve, and automatically detects and corrects the axis deviation between guide sleeve and submersible pump output shaft by correction assembly after ensuring accurate centering, to complete press fitting.The application realizes the full-process automatic installation of mechanical seal, effectively avoids the pollution of sealing surface and installation deviation caused by manual operation, significantly improves assembly quality, sealing reliability and production efficiency.

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, the telescopic rod of the telescopic cylinder A is provided with an air inflation shaft coaxial with the storage total groove, and the telescopic cylinder A is driven to extend so that the air inflation 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 air inflation shaft is in the shape of a truncated cone with gradually reduced diameter.

[0013] Preferably, the rear end of the air inflation shaft is coaxially connected with a blocking rod, the diameter of the blocking rod is greater than that of the air inflation 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 are capable of telescoping perpendicularly to the axial direction of the air inflation 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 one of the half guide sleeves, and the rack drives the connection with the driving part after passing through the sliding slot A.

[0015] Preferably, the half press-fit sleeves are uniformly provided with a plurality of latches on the axial parting surface, and the latches are inserted into the other half press-fit sleeve after the two half press-fit sleeves are closed.

[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 travel probes, the travel probes are arranged in parallel rings in the form of at least two circles at the front end of the guide sleeve, and each circle of the travel probes has at least 3.

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

[0018] Preferably, the correction part is an electric adjustment 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 attitude 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 attitude 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: Eliminate abnormal data: Identify and eliminate abnormal data caused by keyways, etc.;

[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 angle between the currently measured axis of the submersible pump output shaft and the reference axis (Z axis) of the guide sleeve;

[0036] Formula:

[0037] Pitch angle deviation around Y axis: ;

[0038] Rolling angle deviation around X axis: ;

[0039] b. Correction action: In order to eliminate this deviation, the guide sleeve must be rotated by an equal and opposite 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 adjust the center of the guide sleeve to align with the center of the fixed shaft, and 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 retreat, and at the same time, a safety distance S needs to be reserved for press fitting, so the Tz axis needs to be retracted;

[0052] (where is the amount of retreat caused by Rx, Ry rotation, which can be estimated using the small angle formula );

[0053] S4: Perform correction and verification;

[0054] S41. Instruction sending: The travel probe sends the target pose instruction 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 has aligned with the axis of the fixed output shaft;

[0056] S43. Verification:

[0057] a. The guide sleeve is moved forward again, and the probe contacts the measuring point again;

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

[0059] c. Convergence judgment: if and , the correction is successful. Otherwise, according to the following calculation formula, the iterative fine-tuning is carried out.

[0060] Iterative correction formula (kth iteration):

[0061] ;

[0062] ;

[0063] ;

[0064] ;

[0065] S5: Pressing;

[0066] After the correction is successful, the probe is retracted, and the telescopic cylinder F drives the guide sleeve to perform pressing along the already aligned axis.

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

[0068] 1. The present application realizes the full-process automation of mechanical seal from feeding, sorting to pressing through the cooperation of the conveying mechanism, the mounting mechanism and the workbench, completely avoids the pollution of the static ring and the dynamic ring end face by hands or tools during the manual installation process, guarantees the cleanliness and integrity of the sealing surface from the root, and significantly improves the sealing reliability and service life of the product.

[0069] 2. The equipment integrates a high-precision correction assembly, which can automatically detect and fit the actual spatial axis of the output shaft of the submersible pump through the travel probe, and drive the electric adjustment frame to actively compensate the pose of the guide sleeve in multiple degrees of freedom, to ensure the accurate centering of the installation axis and the output shaft axis. This function effectively overcomes the installation deflection problem caused by part machining errors, avoids damage to the mechanical seal caused by scratching with the installation groove during pressing, and greatly improves the assembly consistency and success rate.

[0070] 3. The overall equipment structure design is ingenious, and the automation degree is high. The cooperation of the air inflation shaft and the blocking rod is used in the conveying mechanism, reliable pickup and orderly feeding of the parts are realized, the split type guide sleeve and the pressing sleeve design of the mounting mechanism, and the bolt engagement structure guarantee stable clamping of the parts, and realize smooth and accurate pressing action. This greatly improves the production efficiency, reduces the dependence on skilled workers, and is suitable for large-scale batch production. BRIEF DESCRIPTION OF DRAWINGS

[0071] Figure 1 is the structural schematic diagram of the present application;

[0072] Figure 2 is the structural schematic diagram of the mobile station assembly;

[0073] Figure 3 is the bottom schematic diagram of the mobile station assembly;

[0074] Figure 4 is the structural schematic diagram of the mounting mechanism;

[0075] Figure 5 is the exploded view of the mounting mechanism;

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

[0077] Figure 7 is the structural schematic diagram of the telescopic cylinder A and the air inflation shaft;

[0078] Figure 8 is the structural schematic diagram of the storage total tank;

[0079] Figure 9-1 is the control logic of the present scheme Figure 1 ;

[0080] Figure 9-2 is the control logic of the present scheme Figure 2 .

[0081] Reference: 1. work total station; 11. mobile station assembly; 11a. table plate; 11b. fixed barrier A; 11c. fixed barrier B; 11d. sliding groove B; 11e. sliding groove C; 11f. movable barrier A; 11g. movable barrier 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. support; 22. telescopic cylinder B; 23. guide sleeve; 23a. half guide sleeve; 23b. sliding groove A; 24. press-fit sleeve; 24a. half press-fit sleeve; 24b. latch; 25. rack; 26. drive part; 26a. gear; 26b. power motor; 27. correction assembly; 27a. inclination detection part 271a. stroke probe; 27b. correction part; 3. conveying mechanism; 31. storage total slot; 31a. static ring storage slot; 31b. spring storage slot; 31c. moving ring storage slot; 32. static ring vibration conveying disc; 33. spring vibration conveying disc; 34. moving ring vibration conveying disc; 35. telescopic cylinder A; 36. gas expansion shaft; 37. blocking rod. DETAILED DESCRIPTION

[0082] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0083] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0084] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0085] As Figures 1-8The illustrated submersible pump mechanical seal automatic installation equipment comprises a work bench 1. A plurality of mobile table assemblies 11 are arranged on the work bench 1, and are used for positioning and fixing the motor during installation of the mechanical seal.

[0086] A set of installation mechanisms 2 are arranged on the side of the work bench 1. The installation mechanisms 2 can clamp the mechanical seal to be installed, and after the mechanical seal is sleeved on the output shaft of the submersible pump, the installation mechanisms 2 are pressed into the installation groove of the submersible pump, so that automatic installation of the mechanical seal is realized.

[0087] Meanwhile, in order to improve the degree of automation of installation of the mechanical seal, the present scheme further comprises a conveying mechanism 3. The conveying mechanism 3 is located on the side of the installation mechanisms 2 away from the submersible pump, and the conveying mechanism 3 is used for sequentially arranging the static ring, the spring and the dynamic ring constituting the mechanical seal in order and then feeding the static ring, the spring and the dynamic ring into the installation mechanisms 2, so as to reduce the material preparation time of the installation mechanisms 2 and reduce the dependence on manual work.

[0088] Specifically, there are various means for realizing automatic conveying of the mechanical seal. The present scheme adopts the following manner: as shown in Figures 6-8 The conveying mechanism 3 comprises a storage total groove 31. The storage total groove 31 is in the shape of an open semicircle, and the storage total groove 31 is inclined in the shape of a lower chord, so that the mechanical seal can be kept in a stable state in the groove by its own gravity after entering the groove. As shown in Figure 8 The storage total groove 31 specifically comprises a static ring storage groove 31a, a spring storage groove 31b and a dynamic ring storage groove 31c. The widths of the three storage grooves are all 1 mm larger than the axial lengths of the stored parts, so as to ensure smooth entry of the parts and to constrain the parts by the groove walls, so that the static ring, the dynamic ring and the like are kept in an upright state.

[0089] In addition, the conveying mechanism 3 further comprises a static ring vibration conveying disc 32 which is tangentially connected to the static ring storage groove 31a, a spring vibration conveying disc 33 which is tangentially connected to the spring storage groove 31b, and a dynamic ring vibration conveying disc 34 which is tangentially connected to the dynamic ring storage groove 31c. The components (static ring, spring and dynamic ring) of the mechanical seal are respectively placed in the corresponding vibration conveying discs, and after being arranged by the vibration discs, the components are rolled into the corresponding storage grooves in the required state. It should be noted that the vibration disc is a conventional technical means for arranging materials and realizing orderly conveying, and will not be described herein.

[0090] When the static ring, the spring and the dynamic ring enter the storage total groove 31, the static ring, the spring and the dynamic ring need to be extracted and accurately conveyed to the installation mechanisms 2 in front by related equipment.

[0091] Specifically, a telescopic cylinder A35 is arranged on the side of the storage tank 31 opposite to the submersible pump, and the telescopic rod of the telescopic cylinder A35 can be extended along the axial direction of the storage tank 31. The end of the telescopic rod is coaxially connected to an air inflation shaft 36. When the air inflation shaft 36 is not inflated, the diameter of the air inflation shaft 36 is smaller than the inner diameter of the static ring, the spring and the dynamic ring, so that the air inflation shaft 36 can smoothly pass through these parts under the drive of the telescopic cylinder A35. When the air inflation shaft 36 is inflated, the air inflation blocks on the surface of the air inflation shaft 36 protrude radially and abut against the inner side of the parts. At this time, the parts are lifted and separated from the storage tank 31, and the telescopic cylinder A35 is driven to extend axially again, so that the parts can be moved out of the storage tank 31 and sent to the mounting mechanism 2.

[0092] Preferably, to ensure that the air inflation shaft 36 can smoothly pass through the parts, the front end of the air inflation shaft 36 is designed in a conical frustum shape with a gradually reduced diameter.

[0093] In addition, it should be noted that the present scheme uses a vibrating disc to convey the parts, and a large number of parts are stored in the guide groove connected between the vibrating disc and the storage tank 31. When the air inflation shaft 36 moves the parts in the storage tank 31 out, the parts in the guide groove will roll into the storage tank due to gravity. If the parts are not constrained, the air inflation shaft 36 may interfere or collide with the parts when it is reset, which may damage the parts, or even cause the storage tank 31 or the air inflation shaft 36 to deform, affecting the normal operation of the equipment. The existing technology usually uses a gate or a rack-type stepping structure to control the sequence of parts entering, but such a way has low reliability and requires additional automation components and equipment costs.

[0094] Therefore, as shown in Figure 7 , a blocking rod 37 coaxial with the air inflation shaft 36 is arranged behind the air inflation shaft 36, which is used to prevent the parts from entering the storage tank 31 during the forward extension of the air inflation shaft 36. The diameter of the blocking rod 37 is not less than the minimum diameter of the air inflation shaft 36, and is smaller than the inner diameter of the storage tank 31, and the length of the blocking rod 37 is not less than the extension stroke of the air inflation shaft 36 for conveying the parts. When the air inflation shaft 36 passes through the storage tank 31, the blocking rod 37 also enters the tank, and the outer edge of the parts in the guide groove abuts against the surface of the blocking rod 37 and cannot enter the storage tank 31. When the air inflation shaft 36 is reset and retracted, it will not interfere with the parts that have not entered the tank.

[0095] After the parts are sequentially prepared and conveyed, the parts need to be clamped and mounted.

[0096] As shown in Figure 4 , Figure 5As shown, the mounting mechanism 2 includes a bracket 21 arranged on the side of the workbench 1. Two sets of telescopic cylinders F28 are arranged below the bracket 21. The two sets of telescopic cylinders F can extend along the output shaft of the submersible pump in the axial direction. The two sets of telescopic cylinders F28 are respectively connected to telescopic cylinders B22, which can be telescoped in a direction perpendicular to the axis of the gas expansion shaft 36. Meanwhile, a guide sleeve 23 and a pressing sleeve 24 are arranged. The guide sleeve 23 is coaxially arranged with the gas expansion shaft 36 and is split along the axis to form two symmetrical half guide sleeves 23a, which are respectively connected to the corresponding telescopic cylinders B22. By controlling the telescoping of the telescopic cylinders B22, the opening and closing of the guide sleeve 23 can be realized. The inner diameter of the guide sleeve 23 is matched with the outer diameter of the static ring and the dynamic ring in the mechanical seal, so that the parts delivered by the gas expansion shaft 36 can be clamped by the closed guide sleeve 23. In addition, it should be noted that the spring serves as a part between the static ring and the dynamic ring. When not subjected to external force, due to its size characteristics, the spring will be located between the annular areas of the dynamic ring and the static ring, and will not interfere with the pressing of the mechanical seal.

[0097] The pressing sleeve 24 is arranged inside the guide sleeve 23 and can slide in the axial direction of the guide sleeve 23 when the mechanical seal is mounted, so as to press the mechanical seal clamped by the guide sleeve 23 into the mounting groove of the submersible pump.

[0098] Specifically, the pressing sleeve 24 is split along the axis to form two half pressing sleeves 24a, which are respectively coaxially attached to the inner walls of the corresponding half guide sleeves 23a. The half pressing sleeves 24a are slidably connected to the inner surfaces of the half guide sleeves 23a through the axial sliding rails thereon. When the half pressing sleeves 24a are subjected to an axial force, they can slide in the axial direction of the guide sleeve 23. As shown in the figure, Figure 5 An axial sliding groove A23b is opened on one of the half guide sleeves 23a, and a rack 25 is arranged on the outer surface of the corresponding half pressing sleeve 24a. The rack 25 extends in the axial direction and passes through the sliding groove A23b. Meanwhile, a driving part 26 is arranged on the half guide sleeve 23a, which includes a gear 26a engaged 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 can drive the pressing sleeve 24 to move towards the mounting groove, so as to press the mechanical seal into the groove.

[0099] It should be noted that the inner diameter of the pressing sleeve 24 should be greater than the diameter of the output shaft of the submersible pump, so as to ensure that the output shaft can smoothly pass through during pressing.

[0100] In addition, during the pressing process, the two half pressing sleeves 24a originally only rely on the friction force of the contact surface to realize synchronous movement. This mode is unstable and prone to relative movement between the two half pressing sleeves 24a. In order to improve this situation, as shown in the figure, Figure 5 A plurality of pins 24b are uniformly arranged on the parting surface of one of the half pressing sleeves 24a, and a groove matching the pins 24b is opened on the other parting surface. When the two half pressing sleeves 24a are closed, the pins 24b are inserted into the groove, realizing the engagement between the two half pressing sleeves 24a and enhancing the synchronicity.

[0101] In some embodiments, due to machining precision problems, the extension direction of the output shaft of the submersible pump housing after being fixed on the moving table assembly 11 can have an angular deviation from the theoretical axis required for assembly. If the deviation is greater than 0.5° and the guide sleeve 23 is not adjusted, the mechanical seal is directly forced to be sleeved on the output shaft and pressed into the groove, which can cause the static ring and the dynamic ring to rub against the groove wall, resulting in damage and deformation of the parts, affecting the sealing effect, and even causing the submersible pump to be unable to operate normally. Therefore, the present scheme needs to be able to adjust 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] As shown in Figure 5 , the mounting mechanism 2 is also provided with a correction assembly 27, including an inclination detection part 27a and a correction part 27b. The inclination detection part 27a is used to detect the deflection angle between the output shaft and the mounting mechanism 2, and the correction part 27b is used to adjust the mounting mechanism 2 to make it coaxial with the output shaft.

[0103] The inclination detection part 27a includes a plurality of travel probes 271a arranged in spoke form at the front end of the guide sleeve 23, and is divided into at least two parallel circles, with at least 3 probes in each circle. At least two travel probes 271a on the same axis are used as a group to accurately calculate the deviation between the output shaft axis and the guide sleeve 23 axis by plane fitting, providing a basis for the correction part 27b.

[0104] It should be noted that in some embodiments, the probes may enter the keyway of the output shaft when they are extended. In order to avoid the influence of this situation on measurement, four travel probes 271a are arranged in each circle in the present scheme, uniformly distributed at an angle of 90°. In this way, even if one group of probes has data deviation due to entering the keyway, the accuracy of the deviation calculation can still be ensured by relying on the data of the other three groups.

[0105] As shown in Figure 5 , the correction part 27b includes an electric adjustment frame (such as a five-degree-of-freedom or six-degree-of-freedom electric adjustment frame of Comtanxi). After the telescopic cylinder B is connected to the designed and standardized electric adjustment frame port, it can be completely driven. When the inclination detection part 27a inputs the detection data into the electric adjustment frame, the adjustment frame will make corresponding angle adjustment, so that the angle between the guide sleeve 23 axis and the output shaft axis is less than 0.5°, thereby ensuring that the static ring and the dynamic ring will not rub against the groove wall during subsequent pressing.

[0106] It needs to be mentioned that the work table 1 of the present application comprises a longitudinally extending support frame 12. Two horizontally extending lead screws 13 are arranged in parallel on the frame, and the lead screws are respectively provided with transmission wheels 14 at the same side end. A transmission belt 15 is arranged around the two transmission wheels 14, and the two lead screws 13 are synchronously rotated through the belt. In some embodiments, the transmission wheels 14 and the transmission belt 15 can adopt the form of gears and gear belts to improve stability. One of the transmission wheels 14 is coaxially connected with a driving motor 16, which serves as a power source to drive the rotation of the lead screws 13. As shown in Figures 1-3 The moving table assembly 11 is arranged on the two lead screws 13 and is drivenly connected with the lead screws, so that the submersible pump to be installed with a mechanical seal can be self-pre-tightened and fixed after being hoisted to the assembly. Specifically, the moving table assembly 11 comprises a table plate 11a, the bottom of which is screwed with the two lead screws 13, so that the table plate 11a can be moved along the axial direction of the lead screws when the lead screws 13 rotate. The upper surface of the table plate 11a is provided with a fixed stop A 11b and a fixed stop B 11c, which are arranged at a right angle and are used to abut against the side surface of the base of the submersible pump. Meanwhile, the upper surface of the table plate 11a is also provided with a movable stop A 11f and a movable stop B 11g, wherein the movable stop A 11f is parallel to the fixed stop A 11b, and the movable stop B 11g is parallel to the fixed stop B 11c. The table plate 11a is provided with a sliding groove B 11d and a sliding groove C 11e, wherein the sliding groove B 11d is perpendicular to the fixed stop A 11b, and the sliding groove C 11e is perpendicular to the fixed stop B 11c. The lower surface of the table plate 11a is provided with a telescopic cylinder D 11h and a telescopic cylinder E 11i, wherein the telescopic cylinder D 11h is fixedly connected with the movable stop A 11f and can drive the movable stop A 11f to move close to or away from the fixed stop A 11b, and the telescopic cylinder E 11i is fixedly connected with the movable stop B 11g and can drive the movable stop B 11g to move close to or away from the fixed stop B 11c.

[0107] It needs to be mentioned that the present application also discloses an automatic installation step of a mechanical seal with a correction function, as shown in Figure 9-1 、 Figure 9-2 which specifically comprises:

[0108] S0: fixing the submersible pump to be installed with a mechanical seal on the moving table assembly;

[0109] S1: system initialization and reference establishment

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

[0111] S12. Moving into position: the moving table assembly fixes the submersible pump on the work table. The electric adjustment frame drives the guide sleeve to move to the theoretical zero point position.

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

[0113] S21. Probe extension and contact: The motorized adjustment frame controls the guide sleeve to slowly advance along the Z axis. Then, the double-loop travel probe at the front end of the guide sleeve extends radially to make contact with the cylindrical surface of the fixed output shaft of the submersible pump.

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

[0115] S23. Data processing: Eliminate abnormal data: Identify and eliminate abnormal data caused by keyways, etc.

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

[0117] a. Use the A-loop effective data to fit the center of section A OA(XA, YA).

[0118] b. Use the B-loop effective data to fit the center of section B OB(XB, YB).

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

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

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

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

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

[0124] Formula:

[0125] Pitch angle deviation around Y axis:

[0126] Roll angle deviation around X axis:

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

[0128]

[0129]

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

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

[0132] Equation:

[0133] The goal is to adjust the center of the guide sleeve to align with the center of the fixed shaft. This target center is the midpoint Omid of the two circle centers 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 retreat. At the same time, a safety distance S needs to be reserved for press fitting. Therefore, the Tz axis needs to be retracted.

[0140] (where is the amount of retreat caused by Rx, Ry rotation, which can be estimated using the small angle formula )

[0141] S4: Perform correction and verification

[0142] S41. Instruction sending: The travel probe sends the target pose instruction 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 has been aligned with the axis of the fixed output shaft.

[0144] S43. Verification:

[0145] a. The guide sleeve is moved forward again, and the probe is contacted again to measure.

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

[0147] c. Convergence judgment: If and , the correction is successful. Otherwise, according to the following calculation formula, the iterative fine tuning is carried out.

[0148] Iterative correction formula (kth iteration):

[0149] ;

[0150] ;

[0151] ;

[0152] ;

[0153] S5:Pressing

[0154] After the correction is successful, the probe is retracted, and the guide sleeve is driven by the telescopic cylinder F to perform pressing along the aligned axis.

[0155] As can be seen from the above steps, the deviation angle between the adjusted guide sleeve axis and the output shaft axis of the submersible pump will be less than 0.5°, at which time the mechanical seal clamped by the guide sleeve is sequentially pressed into the pressing groove of the submersible pump through the pressing sleeve.

[0156] Working principle:

[0157] Workbench 1: The worker hoists the submersible pump to be installed with a mechanical seal onto the mobile assembly 11, fine-tunes the state of the submersible pump, and then starts the telescopic cylinders D11h and E11i to drive the movable bars A11f and B11g to move towards the corresponding fixed bars, thereby aligning and clamping the submersible pump. After completion, the drive motor 16 is started to rotate the lead screw 13, so that the submersible pump on the mobile assembly 11 moves to the work station where the installation mechanism 2 is located, at which time the output shaft of the submersible pump is substantially coaxial with the guide sleeve 23 of the installation mechanism 2.

[0158] Conveying mechanism 3: The telescopic cylinder A35 extends to drive the gas expansion shaft 36 to insert into the mechanical seal part in the storage tank 31. After the gas expansion shaft 36 expands, the part is lifted away from the storage tank 31, and then the telescopic cylinder A35 continues to extend to send the part to the space between the two half guide sleeves 23. Next, the two half guide sleeves 23a close under the drive of the telescopic cylinder B22 to clamp the part. The gas expansion shaft 36 is immediately retracted to leave the part in the guide sleeve 23. It should be noted that during the retraction of the gas expansion shaft 36, the blocking rod 37 blocks the subsequent part from entering the storage tank 31; when the gas expansion shaft 36 is completely withdrawn, the part rolls 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 cases:

[0160] Ideal case: The output shaft of the submersible pump is coaxial with the guide sleeve 23. The guide sleeve 23 moves towards the output shaft under the drive of the telescopic cylinder F, so that the mechanical seal sleeve is on the shaft. When the end surface of the guide sleeve 23 contacts the submersible pump, the pressing sleeve 24 moves axially under the drive of the drive part 26 to press the mechanical seal into the installation groove.

[0161] Deviation: due to processing error, the output shaft and the guide sleeve 23 axis do not coincide. At this time, the correction assembly 27 is started, the correction part 27b first sends the guide sleeve 23 forward, so that the front end of the guide sleeve 23 is sleeved on the front end of the output shaft. Then the travel probe 271a is extended to measure, after the data collection is completed, the correction part 27b adjusts the angle of the guide sleeve 23 according to the preset program. After the correction is completed, the telescopic cylinder F acts to drive the guide sleeve 23 to be sleeved on the output shaft, and mechanical sealing sleeving and pressing are performed.

[0162] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, 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); 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 spring 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. The telescopic cylinder A (35) is driven to extend so that the pneumatic shaft (36) passes through the moving ring, spring and stationary ring stored in the storage main trough (31) in sequence. 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). 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 half press-fit sleeve (24a). The half press-fit sleeve (24a) is axially slidably disposed on the inner surface of the semi-guide sleeve (23a). The end face of the half 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 half press-fit sleeves (24a). A sliding groove A (23b) is opened on one of the semi-guide sleeves (23a). The rack (25) drives the connecting drive part (26) after passing through the sliding groove A (23b). 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, and each ring of travel probes (271a) has at least 3 probes.

2. The automatic installation device for a submersible pump mechanical seal as described in claim 1, characterized in that: The front end of the air shaft (36) is a frustum-shaped cone with a gradually decreasing diameter.

3. The automatic installation device for a submersible pump mechanical seal as described in claim 1, 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 (24a).

4. The automatic installation device for a submersible pump mechanical seal as described in claim 1, characterized in that: There are 4 probes per revolution (271a), and they are evenly distributed at a 90° angle.

5. The automatic installation device for a submersible pump mechanical seal as described in claim 4, characterized in that: The correction part (27b) is an electric adjustment frame.

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