CN217148461U

CN217148461U - Shaft lifting device for centrifugal compressor or pump

Info

Publication number: CN217148461U
Application number: CN202122580784.8U
Authority: CN
Inventors: 唐韵
Original assignee: Shanghai Gaoqiao Sgpec Petrochemical Engineering & Construction Co ltd
Current assignee: Shanghai Gaoqiao Sgpec Petrochemical Engineering & Construction Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-08-09
Anticipated expiration: 2031-10-26

Abstract

The utility model discloses a shaft lifting device for a centrifugal compressor or a pump, which is fixedly arranged on a cylinder body provided with a shaft, and comprises a tool main body and a shaft lifting assembly, wherein the tool main body is in an omega shape with bilateral symmetry and comprises two same first platforms and a second platform positioned between the two first platforms; the lifting shaft assembly is arranged on the second platform and comprises an internal thread adjusting handle and an adjusting screw rod sleeve; the adjusting screw rod sleeve comprises a screw rod and a shaft sleeve fixed at the first end of the screw rod, the second end of the screw rod penetrates through the second platform from bottom to top, the adjusting screw rod sleeve is installed on the second platform through the internal thread adjusting handle, and the central axis of the shaft sleeve is coincided with the central axis of the shaft. The utility model provides a lift a device easy operation for centrifugal compressor or pump has improved work efficiency and operating mass with rated load, has reduced the harm to equipment, has reduced maintenance work's danger.

Description

Shaft lifting device for centrifugal compressor or pump

Technical Field

The utility model relates to a gas compression device maintenance field, concretely relates to centrifugal compressor or the lower bearing shell dismouting field of pump.

Background

The lower bearing bush is disassembled and assembled when the centrifugal compressor or the pump is maintained, the whole maintenance progress is influenced, however, the lower bearing bush can be disassembled and assembled only by slightly hoisting the shaft by the travelling crane due to the heavy weight of the rotor assembly, the travelling crane is insufficient when a plurality of compressors are maintained simultaneously, the working progress can be influenced, and therefore how to lift the shaft safely, save time and labor and further disassemble and assemble the lower bearing bush is a problem which needs to be considered by maintenance personnel.

The weight of the rotor assembly of some centrifugal compressors or pumps is heavy, and after the front and rear seals are installed, because the front and rear bearing bushes are not supported, the weight of the rotor can be completely forced on the front and rear seals or the shaft seal, and the seals or the shaft seal can be damaged. Need hang the suspender with the driving a vehicle and pull up the axle just can dismouting lower bearing bush when dismouting lower bearing bush, and general work floor only is furnished with a driving a vehicle, and other units just can not use when a unit uses and cause work efficiency low, also have certain potential safety hazard because the dynamics that the driving a vehicle draws the axle is difficult to control, causes the harm to equipment easily.

Therefore, the utility model provides a lift a device for centrifugal compressor or pump can improve work efficiency, improves the maintenance quality, guarantees that equipment passes through the successful operation that drops into of maintenance.

SUMMERY OF THE UTILITY MODEL

When the lower bearing bush is disassembled and assembled at the present stage, the traveling crane is less in equipment, the working efficiency is low, certain potential safety hazards exist, and the equipment is easily damaged.

In order to improve the working efficiency and the maintenance quality, and simultaneously, the utility model provides a safe and labor-saving maintenance work, the utility model provides a shaft lifting device for a centrifugal compressor or a pump, which is fixedly arranged on a cylinder body provided with a shaft and comprises a tool main body and a shaft lifting component, wherein the tool main body is in an omega shape with bilateral symmetry and comprises two same first platforms and a second platform positioned between the two first platforms; the lifting shaft assembly is arranged on the second platform and comprises an internal thread adjusting handle and an adjusting screw rod sleeve; the adjusting screw rod sleeve comprises a screw rod and a shaft sleeve fixed at the first end of the screw rod, the second end of the screw rod penetrates through the second platform from bottom to top, the adjusting screw rod sleeve is installed on the second platform through the internal thread adjusting handle, and the central axis of the shaft sleeve is coincided with the central axis of the shaft.

Preferably, the shaft sleeve is a cylindrical sleeve with a central through hole, and the diameter of the central through hole is matched with that of the shaft; the shaft sleeve is vertically arranged, and the outer side wall of the shaft sleeve is connected with the first end of the screw rod.

Preferably, the internal thread adjusting handle is rotated, and the screw rod rotates along with the internal thread adjusting handle, so that the height of the shaft sleeve is adjusted to be flush with and aligned with a shaft to be lifted, and the shaft can penetrate into the central through hole of the shaft sleeve.

Preferably, the two first platforms are identical, and the height of the second platform is higher than that of the two first platforms.

Preferably, the two first platforms are respectively provided with an oval first through hole, and the tool main body can be detachably connected with the hollow side of the cylinder body through the first through holes; the hollow side of the cylinder body is in a hollow semi-cylindrical shape, and the tool main body is connected with the two radial ends of the hollow side of the cylinder body.

Preferably, the device also comprises an extension device; when the length of the tool body is smaller than the diameter of the cylinder body, the extension device is connected to the two first platforms through the connecting assembly.

Preferably, the extension device comprises two identical extension plates, oval second through holes are formed in the two extension plates, and the second through holes are connected with the first through holes through the connecting assembly.

Preferably, the connecting assembly includes a bolt and a nut matched with the first and second through holes.

Preferably, the second through hole is detachably connected to the cylinder body, and the shaft lifting device provided with the extension device is further installed at two radial ends of the hollow side of the cylinder body.

Preferably, when the length of the tool body is smaller than the diameter of the cylinder, the position of the connecting assembly is adjusted according to the diameter of the cylinder, so that the length of the shaft lifting device provided with the extension device is the same as the diameter of the cylinder.

To sum up, the utility model provides a pair of a lift a device easy operation for centrifugal compressor or pump has improved work efficiency and operating mass with rated load, has reduced the harm to equipment, has reduced the danger of maintenance work.

Drawings

Fig. 1 is a shaft lifting device for a centrifugal compressor or pump according to an embodiment of the present invention;

fig. 2 is a schematic view of a shaft lifting device for a centrifugal compressor or pump according to an embodiment of the present invention mounted on a cylinder body.

Detailed Description

The technical solution, structural features, achieved objects and functions of the embodiments of the present invention will be described in detail below with reference to fig. 1 to 2 in the embodiments of the present invention.

It should be noted that the drawings are simplified and have non-precise ratios, and are only used for convenience and clarity to assist in describing the embodiments of the present invention, and are not used for limiting the conditions of the present invention, so they have no technical essential meaning, and any structural modification, ratio relationship change or size adjustment should still fall within the scope covered by the present invention without affecting the function and the achievable purpose of the present invention.

It is to be noted that, in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

When the lower bearing bush of the centrifugal compressor or the pump is disassembled and assembled, the structural components are shown in fig. 2, the lower bearing bush 8 is arranged on one side of a cylinder body 10, the cylinder body 10 is a hollow semi-cylinder with a concave middle part and two convex sides and is flat, one side of the cylinder body 10 is hollow, the other side of the cylinder body is solid, and the lower bearing bush 8 is arranged on one side of the solid; a cylindrical shaft 9 is arranged above the lower bearing bush 8; one end of the shaft 9 is embedded on the lower bearing bush 8, and the other end of the shaft is suspended above the concave part of the cylinder body 10; therefore, when the lower bearing bush 8 is attached and detached, the shaft 9 needs to be slightly lifted.

A lift shaft assembly for a centrifugal compressor or pump, as shown in figures 1 and 2, comprises a tool body 6 and a lift shaft assembly; the tool main body 6 is in a left-right symmetrical omega shape and comprises two first platforms 62 with the same height and a second platform 63 which is higher than the first platforms 62 and is positioned between the two first platforms 62; the lifting shaft assembly is arranged on the second platform 63 and comprises an adjusting screw rod sleeve 5 and an internal thread adjusting handle 4; the adjusting screw rod sleeve 5 comprises a screw rod with an external thread and a shaft sleeve fixed at the first end of the screw rod, the shaft sleeve is a cylindrical sleeve with a central through hole, and the diameter of the central through hole is slightly larger than that of the shaft 9 to be lifted; the shaft sleeve is vertically arranged, and the outer side wall of the shaft sleeve is connected with the first end of the screw rod; the second end of the screw rod penetrates through the second platform 63 from bottom to top, the screw rod is fixed on the second platform 63 by sleeving the internal thread adjusting handle 4 on the second end of the screw rod, the shaft sleeve is positioned between the two first platforms 62, and the central axis of the shaft sleeve is perpendicular to the first platform 62 and the second platform 63 of the tool main body 6; when the internal thread adjusting handle 4 is screwed clockwise, the screw rod rotates along with the internal thread adjusting handle, so that the adjusting screw rod sleeve 5 slightly ascends, and the adjusting screw rod sleeve 5 descends by rotating the internal thread adjusting handle 4 anticlockwise.

The two first platforms 62 have the same shape and size, and are provided with elliptical first through holes 61.

When the length of the tool body 6 is greater than the diameter of the cylinder 10, no extension device is needed, screws are respectively passed through the two first through holes 61 on the first platform 62, and the positions of the screws are adjustable because the first through holes 61 are oval, so that the two first platforms 62 are fixed at the two radial ends of the hollow side of the cylinder 10.

When the length of the tool main body 6 is smaller than the diameter of the cylinder body 10, the extension devices can be respectively connected to the two first platforms 62 through the connecting assembly, so that the overall length of the shaft lifting device is increased and is matched with the diameter of the cylinder body 10; the connecting assembly comprises a bolt 3 and a nut 2 matched with the first through hole 61; the extension device comprises two identical extension plates 1, an oval second through hole 11 is formed in each extension plate 1, the second through hole 11 of each extension plate 1 can be connected with the first through hole 61 of the first platform 62 through the bolts 3 and the nuts 2, and then the two extension plates 1 are fixed on the two first platforms 62 respectively. Further, since the first through hole 61 and the second through hole 11 are both elliptical through holes, the length of the whole shaft lifting device after the extension device is installed can be further adjusted by adjusting the positions of the bolts 3 in the two through holes.

When the length of the tool body 6 is smaller than the diameter of the cylinder 10, the extension device is mounted on the tool body 6, and the positions of the bolt 3 and the nut 2 are adjusted according to the diameter of the cylinder 10, so that the length of the shaft lifting device mounted with the extension device is the same as the diameter of the cylinder 10.

Further, the shaft lifting device provided with the extension device is fixed at the radial two ends of the hollow side of the cylinder body 10 through a second through hole 11 on the extension plate 1.

When the length of the tool body 6 is smaller than the diameter of the cylinder 10, the use of the lift shaft device with the extension device mounted thereon operates as follows: as shown in fig. 2, firstly, the shaft lifting device provided with the extension device is placed on the hollow side of the cylinder body 10, then the shaft lifting device is translated to the upper part of the cylinder body 10, the internal thread adjusting handle 4 is adjusted, so that the height of the shaft sleeve of the adjusting screw rod sleeve 5 is adjusted, the central through hole of the shaft sleeve is aligned with the height of the shaft 9, the central axis of the shaft sleeve is ensured to be coincident with the central axis of the shaft 9, the shaft lifting device is translated continuously, after the shaft sleeve is sleeved on the shaft 9, the second through holes 11 on the two extension plates 1 are connected with the radial two ends of the hollow side of the cylinder body 10 through screws 7, so that the shaft lifting device is fixed on the cylinder body 10; at this time, the internal thread adjusting handle 4 is screwed clockwise, so that the lead screw is rotated, and the shaft 9 is slightly lifted (only a few tenths of millimeters are required to be lifted, and the rotation angle of the lead screw is negligible), and then the lower bearing bush 8 can be disassembled and assembled.

In another embodiment, the length of the tool body 6 is greater than the diameter of the cylinder 10, so that the two extension plates 1 do not need to be installed, and the two first platforms 62 are directly fixed on the cylinder 10 by screws through the first through holes 61 for subsequent shaft lifting operation.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. A shaft-lifting device for a centrifugal compressor or pump, fixedly arranged on a cylinder (10) fitted with a shaft (9), comprising a tool body (6) and a shaft-lifting assembly, characterized in that said tool body (6) is in the shape of an "omega" with bilateral symmetry, comprising two identical first platforms (62) and a second platform (63) intermediate the two first platforms (62);

the lifting shaft assembly is arranged on the second platform (63) and comprises an internal thread adjusting handle (4) and an adjusting lead screw sleeve (5);

the adjusting screw rod sleeve (5) comprises a screw rod and a shaft sleeve fixed at the first end of the screw rod, the second end of the screw rod penetrates through the second platform (63) from bottom to top, the adjusting screw rod sleeve (5) is installed on the second platform (63) through the internal thread adjusting handle (4), and the central axis of the shaft sleeve is coincided with the central axis of the shaft (9).

2. A shaft lifting device for a centrifugal compressor or pump according to claim 1, characterised in that the bushing is a cylindrical sleeve with a central through hole having a diameter matching the diameter of the shaft (9); the shaft sleeve is vertically arranged, and the outer side wall of the shaft sleeve is connected with the first end of the screw rod.

3. A shaft lifting device for a centrifugal compressor or pump according to claim 2, characterised in that turning the internally threaded adjustment knob (4) the lead screw is turned therewith, thereby adjusting the height of the sleeve to be level and aligned with the shaft (9) to be lifted, so that the shaft (9) can be passed into the central through hole of the sleeve.

4. A shaft lifting device for a centrifugal compressor or pump according to claim 1, characterised in that the two first platforms (62) are identical, the second platform (63) having a higher height than the two first platforms (62).

5. A shaft lifting device for a centrifugal compressor or pump according to claim 1, characterised in that both of said first platforms (62) are provided with an oval first through hole (61), through which first through hole (61) said tool body (6) can be removably connected to the hollow side of the cylinder (10); the hollow side of the cylinder body (10) is in a hollow semi-cylindrical shape, and the tool main body (6) is connected with the two radial ends of the hollow side of the cylinder body (10).

6. A shaft lifting apparatus for a centrifugal compressor or pump according to claim 5, further comprising extension means; when the length of the tool body (6) is smaller than the diameter of the cylinder body (10), the extension device is connected to the two first platforms (62) through the connecting assembly.

7. A shaft lifting device for a centrifugal compressor or pump according to claim 6, characterised in that said extension means comprise two identical extension plates (1), both said extension plates (1) being provided with an oval second through hole (11), the second through hole (11) being connected to said first through hole (61) by said connecting member.

8. A shaft lifting arrangement for a centrifugal compressor or pump according to claim 7, characterised in that the connecting assembly comprises a bolt (3) and a nut (2) matching the first (61) and second (11) through holes.

9. A shaft lifting device for a centrifugal compressor or pump according to claim 7, characterised in that the second through hole (11) is detachably connected to the cylinder block (10), whereby the shaft lifting device with the attached extension means is mounted at both radial ends of the hollow side of the cylinder block (10).

10. A shaft lifting device for a centrifugal compressor or pump according to claim 6, characterized in that when the length of the tool body (6) is smaller than the diameter of the cylinder (10), the position of the connecting assembly is adjusted according to the diameter of the cylinder (10) so that the length of the shaft lifting device with the extension means mounted thereon is the same as the diameter length of the cylinder (10).