Mechanical sealing device for main boiler feed pump

Abstract

The invention relates to a mechanical sealing device for a main boiler feed pump, the mechanical sealing device is used for installing a to-be-sealed workpiece of the main boiler feed pump on a sealer, and the mechanical sealing device comprises a support; the clamping mechanism comprises a first rod piece, a second rod piece and a driving device, the first rod piece and the second rod piece are installed on the support, at least one of the first rod piece and the second rod piece can slide in the first direction, and the driving device is installed on the support and is in transmission connection with the first rod piece and / or the second rod piece; the driving device is used for driving the first rod piece and the second rod piece to get away from each other or get close to each other so as to release or clamp the sealer; and the press-in piece is slidably connected to the first rod piece in the length direction of the first rod piece so as to press the workpiece to be sealed to one side of the inner wall of the sealer in the length direction of the first rod piece. By means of the technical scheme, the mechanical sealing device can reduce the operation difficulty of pressing the workpiece to be sealed into the sealer, and the labor cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of mechanical seals, and in particular to a mechanical seal device for a main boiler feed water pump. Background Art

[0002] Mechanical seal is a sealing form that achieves a close connection between a rotating shaft and a stationary part through a mechanical device. It is usually composed of a sealing ring, a sealing seat, a packing, a spring and other components. Through the action of force and friction, a closed joint is formed to prevent liquid or gas leakage and ensure the smooth operation of the rotating shaft. The process of achieving mechanical sealing includes: pressing the workpiece to be sealed into the sealer, and then installing the packing between the workpiece to be sealed and the sealer to form a closed joint between the workpiece to be sealed.

[0003] However, during installation, the workpiece to be sealed needs to be pressed into the sealer manually, which is cumbersome and labor-intensive. Summary of the invention

[0004] The purpose of the present disclosure is to provide a mechanical sealing device for a main boiler feed water pump, which can reduce the difficulty of pressing a workpiece to be sealed into a sealer and reduce labor costs.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a mechanical sealing device for a main boiler feed pump, the main boiler feed pump includes a workpiece to be sealed, the mechanical sealing device is used to install the workpiece to be sealed on a closure, and includes: a support; a clamping mechanism, the clamping mechanism includes a first rod, a second rod and a driving device, the first rod and the second rod are respectively installed on the support, and at least one of the first rod and the second rod is slidable along a first direction, the driving device is installed on the support and is transmission-connected to the first rod and / or the second rod, the driving device is used to drive the first rod and the second rod to move away from or approach each other to release the closure or clamp the closure; and a pressing member, the pressing member is slidably connected to the first rod along the length direction of the first rod to press the workpiece to be sealed toward one side of the inner wall of the closure along the length direction of the first rod.

[0006] Optionally, the driving device is configured as a motor, and the mechanical sealing device further comprises a transmission structure, and the motor is transmission-connected to the first rod and / or the second rod via the transmission structure.

[0007] Optionally, the transmission structure includes two transmission shafts, a first gear, a second gear and two racks, the two racks are slidably connected to the support along the first direction, the first rod and the second rod are respectively connected to the two racks, the transmission shaft extends along the second direction and passes through the support, one of the two transmission shafts is transmission connected to the motor, each transmission shaft is transmission connected with a first gear and a second gear, the two first gears are respectively meshed with the corresponding racks, and the two second gears are meshed with each other to realize power transmission between the two transmission shafts.

[0008] Optionally, the transmission structure also includes two transmission members, which are slidably connected to the support along the first direction through a first sliding structure, and the first sliding structure includes a sliding groove and a sliding bar that cooperate with each other, and the sliding groove and the sliding bar both extend along the first direction, and one of the sliding groove and the sliding bar is arranged on the transmission member and the other is arranged on the support, the transmission member is formed with a rack, and the first rod member and the second rod member are respectively fixedly connected to the corresponding transmission member.

[0009] Optionally, the press-in piece is slidably connected to the first rod member through a second sliding structure, the second sliding structure includes a protrusion and a groove that cooperate with each other, the groove extends along the length direction of the first rod member and is arranged on the first rod member, and the press-in piece is provided with a protrusion, which is inserted into the groove and slides in the groove along the length direction of the first rod member.

[0010] Optionally, a plurality of first threaded holes are provided on the first rod member, and the plurality of first threaded holes are arranged at intervals along the length direction of the first rod member and extend along the first direction to the bottom surface of the groove respectively. A second threaded hole is provided on the press-in member, and the fastener passes through the corresponding first threaded hole and is fastened to the second threaded hole.

[0011] Optionally, the mechanical sealing device also includes an oil supply assembly, which includes a mounting seat, a connecting seat, a connecting rod and a flexible connecting piece. The mounting seat is fixedly connected to the second rod and is provided with a mounting hole. The connecting seat is provided with a matching hole. The flexible connecting piece is constructed as a hollow tube. Part of the flexible connecting piece is located in the mounting hole and connects the mounting seat and the connecting seat. The connecting rod is slidably arranged in the flexible connecting piece and has a first position and a second position. In the first position, the connecting rod passes through the flexible connecting piece and extends into the matching hole, and the mounting seat and the connecting seat are located on the same straight line; in the second position, the connecting rod is disengaged from the matching hole and retracts into the mounting hole of the mounting seat, and the mounting seat and the connecting seat are arranged at an angle.

[0012] Optionally, the mounting seat is provided with a first magnetic member, the connecting seat is provided with a second magnetic member, the first magnetic member and the second magnetic member are arranged adjacent to each other, and the magnetic poles of the first magnetic member and the magnetic poles of the second magnetic member are configured to attract opposite poles.

[0013] Optionally, the flexible connector is configured as a corrugated tube.

[0014] Optionally, a plurality of edges are formed on one end of the connecting seat facing away from the mounting seat.

[0015] The second end of the sealant is pressed against the first end of the sealant and the second end of the sealant is pressed against the first end of the sealant and the second end of the sealant is pressed against the first end of the sealant and the second end of the sealant is pressed against the second end of the sealant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 A schematic diagram of the structure of the mechanical sealing device provided in the embodiment of the present disclosure in the use state Figure 1 ; Figure 2 A schematic diagram of the structure of the mechanical sealing device provided in the embodiment of the present disclosure in the use state Figure 2 ; Figure 3 A schematic diagram of the structure of a mechanical sealing device provided in an embodiment of the present disclosure; Figure 4 A partial structural schematic diagram of a mechanical sealing device provided in an embodiment of the present disclosure, showing the transmission relationship between the motor and the rack; Figure 5 A schematic structural diagram of a second rod and an oil supply assembly of a mechanical seal device provided in an embodiment of the present disclosure; Figure 6 for Figure 5 A magnified schematic diagram of the local A in the middle; Figure 7 It is a schematic structural diagram of an oil supply assembly in a mechanical seal device provided in an embodiment of the present disclosure.

[0017] Description of Reference Numerals 100-mechanical sealing device; 110-closer; 130-workpiece to be sealed; 10-support; 30-clamping mechanism; 40-pressed piece; 50-transmission structure; 60-oil supply assembly; 70-handle; 80-grip rod; 31-first rod; 32-second rod; 35-driving device; 11-slide groove; 41-protrusion; 311-groove; 351-motor; 352-bracket; 51-transmission shaft; 52-first gear; 53-second gear; 54-rack; 541-slide; 56-transmission member; 61-mounting seat; 62-connecting seat; 63-connecting rod; 64-flexible connecting member; 611-mounting hole; 612-first magnetic member; 621-matching hole; 622-second magnetic member; T1-first direction; T2-second direction. DETAILED DESCRIPTION

[0018] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0019] In the present disclosure, unless otherwise stated, directional words such as "first direction, second direction" refer to the attached Figure 1 In addition, "inside" and "outside" refer to the "inside" and "outside" relative to the corresponding component's own contour. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another element and have no order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0020] Mechanical seal is a kind of sealing form that realizes the airtight connection between rotating shaft and stationary parts through mechanical device. It is usually composed of sealing ring, sealing seat, packing and spring parts. It forms an airtight joint through the action of force and friction to prevent liquid or gas leakage and ensure the smooth operation of rotating shaft.

[0021] The process of achieving mechanical sealing includes: pressing the workpiece to be sealed into the sealer, and then inserting filler between the workpiece to be sealed and the sealer to form a sealed joint. However, during installation, the workpiece to be sealed needs to be manually pressed into the sealer, which is cumbersome and has high labor costs.

[0022] In view of the above issues, please refer to Figures 1 to 4In an embodiment of the present disclosure, a mechanical sealing device 100 for a main boiler feed water pump is provided. The main boiler feed water pump includes a workpiece 130 to be sealed. The mechanical sealing device 100 is used to install the workpiece 130 to be sealed on a closure 110, and includes: a support 10; a clamping mechanism 30, the clamping mechanism 30 includes a first rod 31, a second rod 32 and a driving device 35, the first rod 31 and the second rod 32 are respectively installed on the support 10, and at least one of the first rod 31 and the second rod 32 is along The first direction T1 is slidable, and the driving device 35 is installed on the support 10 and is transmission-connected with the first rod 31 and / or the second rod 32. The driving device 35 is used to drive the first rod 31 and the second rod 32 to move away from or approach each other to release the closure 110 or clamp the closure 110; and the pressing member 40 is slidably connected to the first rod 31 along the length direction of the first rod 31 to press the workpiece 130 to be sealed toward one side of the inner wall of the closure 110 along the length direction of the first rod 31.

[0023] When it is necessary to seal the workpiece 130 to be sealed, the first rod 31 and the second rod 32 are driven to approach each other through the driving device 35, and one of the first rod 31 and the second rod 32 abuts against the workpiece 130 to be sealed. In the process of the first rod 31 and the second rod 32 approaching each other until the first rod 31 and the second rod 32 abut against the two ends of the closure 110 in its axial direction, the workpiece 130 to be sealed is pushed into the inner cavity of the closure 110 along the axial direction of the closure 110 by the first rod 31 or the second rod 32, and then the workpiece 130 to be sealed is pressed against the inner wall of one side of the inner cavity of the closure 110 by the pressing piece 40 installed on the first rod 31, so that the position of the workpiece 130 to be sealed in the inner cavity of the closure 110 is relatively fixed. In this way, there is no need to manually fix the workpiece 130 to be sealed when filling the filler into the gap between the workpiece 130 to be sealed and the sealer 110; the position of the workpiece 130 to be sealed is also relatively fixed when the filler is fiddled with before adding lubricating liquid to the workpiece 130 to be sealed, thereby improving the convenience of operation.

[0024] Through the above technical solution, when the mechanical sealing device 100 for the main boiler feed water pump provided by the present disclosure is in use, the driving device 35 drives the first rod 31 and the second rod 32 to approach each other, and one of the first rod 31 and the second rod 32 abuts against the workpiece 130 to be sealed. In the process of the first rod 31 and the second rod 32 approaching each other until the first rod 31 and the second rod 32 abut against the two ends of the closure 110 in the axial direction, the workpiece 130 to be sealed is pushed into the inner cavity of the closure 110 along the axial direction of the closure 110 by the first rod 31 or the second rod 32, and the first rod 31 and the second rod 32 abut against the two ends of the closure 110 in the axial direction. When the seal part 130 is sealed, the first rod 31 and the second rod 32 are used to fix the seal workpiece 130 in the axial direction of the sealer 110; and the press-in member 40 is used to press the seal workpiece 130 toward the inner wall of one side of the sealer 110 along the length direction of the first rod 31, so as to fix the seal workpiece 130 in the radial direction of the sealer 110, so that the seal workpiece 130 is fixed in position in the sealer 110. In this way, when filling the gap between the seal workpiece 130 and the sealer 110 or fiddling with the filler before adding lubricating liquid to the seal workpiece 130, it is not necessary to manually fix the seal workpiece 130, the operation is simple, and the labor cost is greatly reduced. At the same time, by adjusting the distance between the press-in member 40 and the inner wall of the sealer 110, the seal workpiece 130 of different radial sizes can be sealed, which greatly improves the compatibility and versatility of the sealer 110.

[0025] In the embodiment of the present disclosure, the main boiler feed water pump is a pump device for delivering feed water to the boiler, and the workpiece to be sealed 130 of the main boiler feed water pump is sealed in the closure 110 to ensure the normal operation of the main boiler feed water pump. The workpiece to be sealed 130 can be the rotating shaft of the main boiler feed water pump.

[0026] Here, the closure 110 may be a cylindrical tube-shaped structure, and the closure 110 has a first opening and a second opening opposite to each other in the axial direction of the closure 110, and the workpiece 130 to be sealed is loaded into the inner cavity of the closure 110 through the first opening or the second opening. The first rod 31 and the second rod 32 are installed on the same side of the support 10 to be located at the first opening and the second opening of the closure 110 respectively, and the closure 110 is clamped when the first rod 31 and the second rod 32 are close to each other, and the closure 110 is released when the first rod 31 and the second rod 32 are away from each other. Here, the first direction T1 is parallel to the axial direction of the closure 110.

[0027] In the embodiment of the present disclosure, the driving device 35 drives the first rod 31 and the second rod 32 to approach each other, and one of the first rod 31 and the second rod 32 abuts against the workpiece 130 to be sealed. In the process of the first rod 31 and the second rod 32 approaching each other until the first rod 31 and the second rod 32 abut against the two ends of the closure 110 in the axial direction, the workpiece 130 to be sealed is pushed into the inner cavity of the closure 110 along the axial direction of the closure 110 by the first rod 31 or the second rod 32. When the first rod 31 and the second rod 32 abut against the two ends of the closure 110 in the axial direction, the workpiece 130 to be sealed is fixed in the axial direction of the closure 110 by the first rod 31 and the second rod 32. By arranging a press-in member 40 on the first rod 31, when the press-in member 40 moves along the length direction of the first rod 31, the distance between the press-in member 40 and the inner wall of the closure 110 can be adjusted, so that the closure 110 can be used to seal workpieces 130 to be sealed with different radial sizes. Then, after the workpiece 130 to be sealed is loaded into the sealer 110, the workpiece 130 to be sealed is pressed against the inner wall of one side of the sealer 110 by the press-in member 40, so that the position of the workpiece 130 to be sealed in the inner cavity of the sealer 110 can be relatively fixed. The workpiece 130 to be sealed can be a cylindrical structure, which is not specifically limited in the present disclosure.

[0028] It is understandable that the length of the first rod 31 should match the sliding distance required for the press-in member 40 to press the workpiece 130 to be sealed toward the inner wall of one side of the closure 110 .

[0029] In some embodiments of the present disclosure, the mechanical seal device 100 may further include a handle 70 and a handle 80, the handle 80 being fixedly connected to a side of the support 10 facing away from the first rod 31, and the handle 70 being installed at an end of the handle 80 away from the support 10. In some embodiments, the handle 80 is a cylindrical structure, the top of the cylindrical handle 80 is provided with the handle 70, and the handle 80 is fixedly connected to the support 10. By providing the handle 70 and the handle 80, the mechanical seal device 100 can be held more conveniently, and the convenience of using the mechanical seal device 100 is improved. In the embodiments of the present disclosure, the drive device 35 can be constructed in any suitable manner, and the present disclosure does not make specific restrictions on this. In one embodiment, the drive device 35 can be constructed as a cylinder or a linear motor, in which case the output end of the cylinder or the linear motor is transmission-connected to the first rod 31 or the second rod 32 to achieve the first rod 31 and the second rod 32 moving away from or approaching each other.

[0030] In some embodiments, the driving device 35 can also be constructed as a motor 351, and the mechanical sealing device 100 also includes a transmission structure 50. The motor 351 is connected to the first rod 31 and / or the second rod 32 through the transmission structure 50, and the rotational motion of the motor 351 is converted into linear motion of the first rod 31 and / or the second rod 32 through the transmission structure 50.

[0031] In the embodiments provided in the present disclosure, the transmission structure 50 may be constructed in any suitable manner, and the present disclosure does not impose any specific limitation on this.

[0032] In some embodiments provided in the present disclosure, the transmission structure 50 can be constructed as a screw-nut transmission structure, wherein one end of the screw in the screw-nut transmission structure is transmission-connected to the motor 351, and the motor 351 drives the screw to rotate so that the nut seat in the screw-nut transmission structure moves along the axial direction of the screw, and the nut seat is fixedly connected to one of the first rod 31 and the second rod 32, and one of the first rod 31 and the second rod 32 moves with the movement of the nut seat to approach or move away from the other of the first rod 31 and the second rod 32. In this embodiment, the motor 351 can also be connected to the screw transmission in the two groups of screw and nut transmission structures through a synchronous transmission structure. The nut seats in each group of screw and nut transmission structures are respectively fixedly connected to the first rod 31 and the second rod 32. The rotation of the motor 351 can drive the screws in the two groups of screw and nut transmission structures to rotate synchronously through the synchronous transmission structure, and then drive the first rod 31 and the second rod 32 to move synchronously through the nut seats in the two groups of screw and nut transmission structures, thereby realizing power transmission between the motor 351 and the first rod 31 and the second rod 32.

[0033] In some other embodiments provided in the present disclosure, reference Figure 3 and Figure 4 As shown in the figure, the transmission structure 50 may include two transmission shafts 51, a first gear 52, a second gear 53 and two racks 54, the two racks 54 are both slidably connected to the support 10 along the first direction T1, the first rod 31 and the second rod 32 are respectively connected to the two racks 54, the transmission shaft 51 extends along the second direction T2 and passes through the support 10, one of the two transmission shafts 51 is transmission-connected to the motor 351, and each transmission shaft 51 is transmission-connected with a first gear 52 and a second gear 53, the two first gears 52 are respectively meshed with the corresponding racks 54, and the two second gears 53 are meshed with each other to realize power transmission between the two transmission shafts 51.

[0034] When working, the motor 351 drives the transmission shaft 51 connected thereto to rotate, so that the first gear 52 and the second gear 53 on the transmission shaft 51 rotate, wherein the first gear 52 on the transmission shaft 51 meshes with the corresponding rack 54, driving the rack 54 to move along the first direction T1, and the second gear 53 on the transmission shaft 51 meshes with the second gear 53 on another transmission shaft 51 to drive, so that the other transmission shaft 51 and the first gear 52 thereon rotate, and the first gear 52 on the other transmission shaft 51 drives the corresponding rack 54 to move along the first direction T1, thereby driving the first rod 31 and the second rod 32 to move closer to or farther from each other. In some other embodiments provided by the present disclosure, the driving device 35 may include two motors 351, the output shafts of the two motors 351 are respectively sleeved with transmission gears, and the two transmission gears are respectively meshed with the two racks 54, and the rotation of the motor 351 realizes the first rod 31 and the second rod 32 to move closer to or farther from each other through the meshing of the transmission gears and the rack 54.

[0035] In the embodiment provided in the present disclosure, the transmission structure 50 may further include two transmission members 56, which are slidably connected to the support 10 along the first direction T1 through a first sliding structure, and the first sliding structure includes a sliding groove 11 and a sliding bar 541 that cooperate with each other, and the sliding groove 11 and the sliding bar 541 both extend along the first direction T1, and one of the sliding groove 11 and the sliding bar 541 is arranged on the transmission member 56 and the other is arranged on the support 10, the transmission member 56 is formed with a rack 54, and the first rod member 31 and the second rod member 32 are respectively fixedly connected to the corresponding transmission member 56.

[0036] In this embodiment, the transmission member 56 is formed with a plurality of teeth, wherein the plurality of teeth are arranged along the first direction T1 to form a rack 54, and one of the transmission member 56 and the support 10 is formed with a slide bar 541, and the other is formed with a slide groove 11, and the sliding connection between the transmission member 56 and the support 10 is achieved through the sliding cooperation between the slide bar 541 and the slide groove 11. Figure 3 In the illustrated embodiment, the transmission member 56 is formed with a slide bar 541, and the support 10 is formed with a slide groove 11. In embodiments not illustrated in the present disclosure, the transmission member 56 may be formed with a slide groove 11, and the support 10 may be formed with a slide bar 541, and the present disclosure does not make any specific limitation on this.

[0037] It should be noted that the shapes and sizes of the slide groove 11 and the slide bar 541 should match. For example, the slide groove 11 and the slide bar 541 can be constructed in a trapezoidal shape, a rectangular shape, etc., and the present disclosure does not make any specific restrictions on this.

[0038] In the embodiment provided by the present disclosure, a bracket 352 may be fixedly mounted on the outer wall of the support 10 and covered on the motor 351. In some embodiments, refer to Figure 4As shown in , the bracket 352 may include a main body section and two bending sections, wherein one end of the two bending sections are fixedly connected to the two ends of the main body section respectively, and the two bending sections are arranged opposite to each other, and the other ends of the two bending sections are fixedly connected to the support 10, so that the two bending sections and the main body section form a containing space, and the containing space is used to accommodate the motor 351. In the present disclosure, one end of the transmission shaft 51 that is transmission-connected to the motor 351 is exposed to the support 10, and the end is sleeved with a first gear 52, and the arrangement of the bracket 352 can prevent the first gear 52 from scratching the operator when rotating.

[0039] In the embodiment provided in the present disclosure, in order to facilitate the movement of the press-in piece 40 along the length direction of the first rod member 31, the press-in piece 40 can be slidably connected to the first rod member 31 through a second sliding structure. The second sliding structure includes a protrusion 41 and a groove that cooperate with each other. The groove extends along the length direction of the first rod member 31 and is arranged on the first rod member 31. The press-in piece 40 is provided with a protrusion 41, which is inserted into the groove and slides in the groove along the length direction of the first rod member 31, thereby realizing that the press-in piece 40 is slidably connected to the first rod member 31.

[0040] In the embodiment provided in the present disclosure, in order to lock the pressing member 40 on the first rod 31 after the pressing member 40 presses the workpiece 130 to be sealed toward the inner wall of one side of the closure 110, a plurality of first threaded holes are provided on the first rod 31, and the plurality of first threaded holes are arranged at intervals along the length direction of the first rod 31 and extend respectively along the first direction T1 to the bottom surface of the groove of the groove, and a second threaded hole is provided on the pressing member 40, and a fastener passes through the corresponding first threaded hole and is fastened to the second threaded hole to lock the pressing member 40 to the first rod 31. At this time, the pressing member 40 cannot move relative to the first rod 31.

[0041] Then, based on the size of the moving distance of the press-in member 40 on the first rod member 31, a plurality of first threaded holes can be distributed on the first rod member 31 along the length direction of the first rod member 31, and a fastener is passed through one of the plurality of first threaded holes and fastened to the second threaded hole to achieve relative fixation of the press-in member 40 and the first rod member 31.

[0042] See also Figures 1 to 6 In the process of using a traditional mechanical sealing device, after the workpiece to be sealed is installed in the sealer, lubricating oil needs to be added to soak the workpiece to be sealed. At this time, it is necessary to manually pick out the filler that fills the gap between the workpiece to be sealed and the sealer to pour the lubricating oil, which makes the process of adding lubricating oil more troublesome. Then, the mechanical sealing device 100 provided by the present disclosure also includes an oil supply component 60. When lubricating oil needs to be added, the oil supply component 60 can be operated to push away the filler, and then the lubricating oil can be added. Among them, the filler can be cotton felt, and the present disclosure does not make any specific restrictions on this.

[0043] In the embodiment provided in the present disclosure, the oil supply assembly 60 includes a mounting seat 61, a connecting seat 62, a connecting rod 63 and a flexible connector 64. The mounting seat 61 is fixedly connected to the second rod 32 and is provided with a mounting hole 611. The connecting seat 62 is provided with a matching hole 621. The flexible connector 64 is constructed as a hollow tube. A portion of the flexible connector 64 is located in the mounting hole 611 and connects the mounting seat 61 and the connecting seat 62. The connecting rod 63 is slidably arranged in the flexible connector 64 and has a first position and a second position. In the first position, the connecting rod 63 passes through the flexible connector 64 and extends into the matching hole 621. The mounting seat 61 and the connecting seat 62 are located on the same straight line; in the second position, the connecting rod 63 is disengaged from the matching hole 621 and the connecting rod 63 is retracted to the mounting hole 611 located in the mounting seat 61, and the mounting seat 61 and the connecting seat 62 are arranged at an angle.

[0044] In the embodiment of the present disclosure, the position of the connecting rod 63 in the flexible connecting member 64 is adjusted so that the connecting seat 62 and the mounting seat 61 are relatively still or swing. When the connecting seat 62 and the mounting seat 61 are relatively still, that is, in the first position, the connecting rod 63 passes through the flexible connecting member 64 and extends into the matching hole 621. At this time, the mounting seat 61 and the connecting seat 62 are located on the same straight line, and the mounting hole 611 and the matching hole 621 are arranged coaxially. When the connecting seat 62 swings relative to the mounting seat 61, that is, in the second position, the connecting rod 63 disengages from the matching hole 621 and the connecting rod 63 retracts into the mounting hole 611 located in the mounting seat 61. That is to say, at this time, the connecting rod 63 completely disengages from the matching hole 621 and makes the part of the flexible connecting member 64 located between the mounting seat 61 and the connecting seat 62 not supported by the connecting rod 63. In this case, the connecting seat 62 is arranged at an angle to the mounting seat 61 due to its own gravity. Based on the above design, by adjusting the connecting rod 63 to continuously move between the first position and the second position, the connecting seat 62 is swung relative to the mounting seat 61, the filler is pushed away, and the lubricating oil is easily infiltrated into the workpiece 130 to be sealed, thereby improving the efficiency of oil supply and the ease of operation. In the embodiment of the present disclosure, the connection between the flexible connector 64 and the mounting hole 611 and the connecting seat 62 can be bonded and fixed by an adhesive, and the present disclosure does not make any specific restrictions on this.

[0045] In the embodiment of the present disclosure, the extension length of the flexible connector 64 can be lengthened or shortened according to actual conditions while ensuring that the mounting seat 61 is connected to the connecting seat 62, and the present disclosure does not impose any specific restrictions on this.

[0046] In the embodiment provided in the present disclosure, the mounting seat 61 is provided with a first magnetic member 612, and the connecting seat 62 is provided with a second magnetic member 622. The first magnetic member 612 and the second magnetic member 622 are arranged adjacent to each other, and the magnetic poles of the first magnetic member 612 and the magnetic poles of the second magnetic member 622 are configured to attract opposite poles. By arranging the first magnetic member 612 and the second magnetic member 622 with different magnetic properties adjacent to each other on the mounting seat 61 and the connecting seat 62, the swing of the connecting seat 62 is enhanced compared to the mounting seat 61, which is beneficial to improve the success rate of removing the filler.

[0047] In combination with the above-mentioned change of the connecting rod 63 from the first position to the second position, the connecting seat 62 swings due to its own gravity. Then, after the first magnetic member 612 and the second magnetic member 622 are set, while the connecting seat 62 is subjected to gravity, since the second magnetic member 622 is fixed together with the connecting seat 62, it will be subjected to the magnetic force of the first magnetic member 612 on the second magnetic member 622, thereby strengthening the power when the connecting seat 62 swings toward the side of the mounting seat 61. In this way, it is helpful to overcome the resistance of the filler when the connecting seat 62 swings toward the side of the mounting seat 61, thereby improving the success rate of using the connecting seat 62 to swing relative to the mounting seat 61 to remove the filler.

[0048] In the embodiment of the present disclosure, the flexible connector 64 may be constructed as a corrugated tube. In addition, the flexible connector 64 may also be a hose or other flexible tubular structures, and the present disclosure does not make any specific limitations on this.

[0049] In the embodiment provided in the present disclosure, a plurality of edges are formed on one end of the connecting seat 62 away from the mounting seat 61, so that the connecting seat 62 can more easily remove the filler through the edges when swinging.

[0050] In the mechanical sealing device 100 of the present disclosure, the first rod 31 and the second rod 32 are driven to approach each other by the driving device 35, and one of the first rod 31 and the second rod 32 abuts against the workpiece 130 to be sealed. In the process of the first rod 31 and the second rod 32 approaching each other until the first rod 31 and the second rod 32 abut against the two ends of the closure 110 in the axial direction, the workpiece 130 to be sealed is pushed into the inner cavity of the closure 110 along the axial direction of the closure 110 by the first rod 31 or the second rod 32. When the first rod 31 and the second rod 32 abut against the two ends of the closure 110 in the axial direction, the first rod 31 and the second rod 32 are driven to approach each other. The first rod 31 and the second rod 32 realize the axial fixation of the workpiece 130 to be sealed in the closure 110; and then the workpiece 130 to be sealed is pressed toward the inner wall of one side of the closure 110 along the length direction of the first rod 31 by the press-in member 40 to realize the radial fixation of the workpiece 130 to be sealed in the closure 110, so that the position of the workpiece 130 to be sealed is fixed in the closure 110. In this way, when filling the filler into the gap between the workpiece 130 to be sealed and the closure 110 or fiddling with the filler before adding lubricating liquid to the workpiece 130 to be sealed, there is no need to manually fix the workpiece 130 to be sealed, the operation is simple, and the labor cost is greatly reduced.

[0051] At the same time, by adjusting the distance between the press-in piece 40 and the inner wall of the closure 110 , the closure 110 can be used to seal workpieces 130 to be sealed with different radial sizes, thereby greatly improving the compatibility and versatility of the closure 110 .

[0052] In addition, an oil supply assembly 60 is provided on the second rod 32, and the connecting rod 63 is adjusted to continuously move between the first position and the second position, so that the connecting seat 62 can swing relative to the mounting seat 61, and the filler can be pushed apart, thereby facilitating the infiltration of the lubricating oil into the workpiece 130 to be sealed, thereby improving the efficiency of oil supply and the ease of operation. In short, the mechanical sealing device 100 provided by the present disclosure has the characteristics of easy oiling and easy installation. The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0053] It should also be noted that the various specific technical features described in the above specific implementation methods can be combined in any suitable manner without contradiction.

[0054] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A mechanical sealing device for a main boiler feed pump, the main boiler feed pump comprising a workpiece to be sealed, characterized in that: The mechanical sealing device is used to install the workpiece to be sealed on the sealer, and comprises: Support; a clamping mechanism, the clamping mechanism comprising a first rod, a second rod and a driving device, the first rod and the second rod are respectively mounted on the support, and at least one of the first rod and the second rod is slidable along a first direction, the driving device is mounted on the support and is drivingly connected to the first rod and / or the second rod, the driving device is used to drive the first rod and the second rod to move away from or approach each other to release the closure or clamp the closure; and A pressing piece is slidably connected to the first rod along the length direction of the first rod to press the workpiece to be sealed toward one side of the inner wall of the closure along the length direction of the first rod.

2. The mechanical sealing device according to claim 1, characterized in that: The driving device is configured as a motor, and the mechanical sealing device further comprises a transmission structure, through which the motor is transmission-connected to the first rod and / or the second rod.

3. The mechanical sealing device according to claim 2, characterized in that: The transmission structure includes two transmission shafts, a first gear, a second gear and two racks, the two racks are slidably connected to the support along a first direction, the first rod and the second rod are respectively connected to the two racks, the transmission shaft extends along a second direction and passes through the support, one of the two transmission shafts is transmission-connected to the motor, each transmission shaft is transmission-connected with a first gear and a second gear, the two first gears are respectively meshed with the corresponding racks, and the two second gears are meshed with each other to realize power transmission between the two transmission shafts.

4. The mechanical sealing device according to claim 3, characterized in that: The transmission structure also includes two transmission members, which are slidably connected to the support along the first direction through a first sliding structure, and the first sliding structure includes a sliding groove and a sliding bar that cooperate with each other, and the sliding groove and the sliding bar both extend along the first direction, and one of the sliding groove and the sliding bar is arranged on the transmission member and the other is arranged on the support, the transmission member forms the rack, and the first rod member and the second rod member are respectively fixedly connected to the corresponding transmission member.

5. The mechanical sealing device according to any one of claims 1 to 4, characterized in that: The press-in piece is slidably connected to the first rod member through a second sliding structure, the second sliding structure includes a protrusion and a groove that cooperate with each other, the groove extends along the length direction of the first rod member and is arranged on the first rod member, the press-in piece is provided with the protrusion, the protrusion is inserted into the groove and slides in the groove along the length direction of the first rod member.

6. The mechanical sealing device according to claim 5, characterized in that: The first rod member is provided with a plurality of first threaded holes, which are arranged at intervals along the length direction of the first rod member and extend along the first direction to the bottom surface of the groove respectively. The press-in member is provided with a second threaded hole, and the fastener passes through the corresponding first threaded hole and is fastened to the second threaded hole.

7. The mechanical sealing device according to any one of claims 1 to 4, characterized in that: The mechanical seal device further includes an oil supply assembly, which includes a mounting seat, a connecting seat, a connecting rod and a flexible connecting member, wherein the mounting seat is fixedly connected to the second rod and is provided with a mounting hole, the connecting seat is provided with a matching hole, the flexible connecting member is configured as a hollow tube, a portion of the flexible connecting member is located in the mounting hole and connects the mounting seat and the connecting seat, the connecting rod is slidably arranged in the flexible connecting member and has a first position and a second position, In the first position, the connecting rod passes through the flexible connecting member and extends into the matching hole, and the mounting seat and the connecting seat are located on the same straight line; In the second position, the connecting rod is disengaged from the matching hole and the connecting rod is retracted into the mounting hole located in the mounting seat, and the mounting seat is arranged at an angle to the connecting seat.

8. The mechanical sealing device according to claim 7, characterized in that: The mounting seat is provided with a first magnetic member, the connecting seat is provided with a second magnetic member, the first magnetic member and the second magnetic member are arranged adjacent to each other, and the magnetic poles of the first magnetic member and the magnetic poles of the second magnetic member are configured to attract each other with opposite poles.

9. The mechanical sealing device according to claim 7, characterized in that: The flexible connecting piece is configured as a corrugated tube.

10. The mechanical sealing device according to claim 7, characterized in that: A plurality of edges are formed on one end of the connecting seat away from the mounting seat.

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