CN213017320U

CN213017320U - Split type back lid of double entry centrifugal pump rolling bearing body

Info

Publication number: CN213017320U
Application number: CN202022081053.4U
Authority: CN
Inventors: 高峰; 郝树磊; 许斌; 曲政超
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-04-20
Anticipated expiration: 2030-09-21

Abstract

A split type rear cover of a rolling bearing body of a double-suction centrifugal pump relates to the technical field of rolling bearing bodies of centrifugal pumps. The utility model provides a lid be disc cast iron integral type structure behind the current roll formula bearing body, exist because the inside bearing operational aspect of lid outside manger plate ring and bearing body clearance undersize lead to not being convenient for observe behind the bearing body, can't evenly paint lubricating grease on the bearing to and antifriction bearing damages the problem that the back is difficult to change. The utility model discloses go up the back lid and connect through first connecting portion and second connecting portion with lower back lid, first connecting portion are the arch of processing on the lid one side tangent plane of back lid down in the back lid orientation, the recess of processing on the lid one side tangent plane of back lid orientation is gone up in the back lid orientation down to the second connecting portion, the central department processing threaded hole of terminal surface B before the back lid, the pivot screw-thread fit of screw hole and model double suction centrifugal pump. The utility model discloses be applied to 24SH-9A model double suction centrifugal pump rolling bearing body of large-scale water intaking factory.

Description

Split type back lid of double entry centrifugal pump rolling bearing body

Technical Field

The utility model relates to a centrifugal pump rolling bearing body technical field, concretely relates to split type back lid of double entry centrifugal pump rolling bearing body.

Background

The rear cover of the original rolling type bearing body of the 24-model double-suction centrifugal pump is of a disc cast iron integrated structure and is connected with the bearing body through a bolt, a rolling bearing and a bearing back cap playing a role in fixing are arranged inside the bearing body, and a fixed water retaining ring is arranged on the outer side of the rear cover of the bearing body. When daily maintenance and inspection, the bearing body rear cover is detached due to the fact that the gap between the water retaining ring and the bearing body is too small, and then the running condition of the inner bearing is observed in an insufficient space. When the lubricating grease is maintained and added, the lubricating grease cannot be uniformly coated on the bearing because the gap between the rear cover of the bearing body and the water retaining ring is small. When rolling bearing damages and needs to be changed, the bearing body can not be hooked into by the grapple of the hydraulic detacher because the clearance between the bearing body rear cover and the water retaining ring is small, the bearing body cannot be safely detached through machinery, the bearing body rear cover is extremely easy to break due to the overlarge stress on the bearing body rear cover, and the bearing body rear cover can only be detached through the external stress on the bearing body.

To sum up, the lid is disc cast iron integral type structure behind current roll type bearing body, exists because the inside bearing behavior of being not convenient for observe that lid outside water retaining ring and bearing body clearance undersize behind the bearing body lead to, can't evenly paint lubricating grease on the bearing to and antifriction bearing damages the problem that the back is difficult to change.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving present roll formula bearing body hou gai for disc cast iron integral type structure, exist because the bearing body hou gai outside manger plate ring leads to being not convenient for observe the inside bearing operational aspect with bearing body clearance undersize, can't evenly paint lubricating grease on the bearing to and antifriction bearing damages the problem that the back is difficult to change, and then provides a split type back lid of double entry centrifugal pump rolling bearing body.

The technical scheme of the utility model is that:

the utility model provides a split type back lid of double suction centrifugal pump rolling bearing body, it includes back lid 1 and lower back lid 2, goes up back lid 1 and forms lid after the disc with lower back lid 2 is connected through first connecting portion and second connecting portion, first connecting portion are the arch 11 of processing on the lid 2 one side tangent plane of back lid 1 down in last back lid 1 orientation, the recess 21 of processing on the lid 1 one side tangent plane of back lid 1 orientation is seted up for lower back lid 2 orientation to the second connecting portion, screw hole 3 is seted up at the center of lid behind the disc, screw hole 3 and double suction centrifugal pump's pivot screw-thread fit.

Furthermore, a plurality of connecting through holes 4 are uniformly distributed on the front end face B of the disc-shaped rear cover in an annular array mode, and the connecting through holes 4 correspond to bearing back caps arranged inside the bearing body one to one.

Further, a water retaining ring 5 is processed on the rear end face C of the disc-shaped rear cover, an assembling through hole 51 is processed in the center of the rear end face D of the water retaining ring 5, and the assembling through hole 51 and the threaded hole 3 are coaxially arranged.

Furthermore, an annular groove 52 is formed in the middle of the outer cylindrical surface of the water retaining ring 5, the diameter of the outer circle of the water retaining ring 5 is 225mm, the thickness of the water retaining ring 5 is 16mm, the diameter of the annular groove 52 is 210mm, the groove width of the annular groove 52 is 10mm, the distance between the end surface E of the annular groove 52, far away from the disc-shaped rear cover, and the rear end surface D of the water retaining ring 5 is 3mm, and the distance between the rear end surface D of the water retaining ring 5 and the rear end surface C of the disc-shaped rear cover is 13 mm.

Further, the crest diameter of the threaded hole 3 is 136mm, the root diameter is 129mm, and the thread pitch is 4 mm.

Furthermore, go up back lid 1 and lid 2 is the semicircle dish structure after down, goes up back lid 1 and is connected the back with lid 2 down and take the form furtherly, protruding 11 cross-section is the rectangle, recess 21 is the rectangular channel, protruding 11 with be clearance fit between the recess 21.

Further, the thickness of the protrusion 11 is 5mm, and the height thereof is 5 mm.

Compared with the prior art, the utility model has the following effect:

the utility model discloses a split type back lid of double entry centrifugal pump rolling bearing body can reduce the maintenance number of times, has shortened maintenance duration, simultaneously, can also clearly observe the bearing condition to cause the damaged problem of back lid when avoiding demolising, reduce economic loss, if when needing to be changed, only need to go up back lid and lower back lid whole change or change alone can. The utility model discloses an go up back lid and back lid down, through with the protruding cartridge on the back lid tangent plane of going up in the recess on the back lid tangent plane down, have water to gradually go into when can avoiding the water pump operation on the one hand, on the other hand can also play the fixed action. The rear cover body and the lower rear cover body are connected with the bearing body through connecting bolts, so that the rear cover body and the lower rear cover body are convenient to disassemble and assemble. During daily maintenance and inspection, the water retaining ring can be detached along with the upper rear cover body and the lower rear cover body, so that the operation condition of the inner bearing can be observed conveniently; when the grease is injected during maintenance, the water retaining ring can be detached along with the upper rear cover body and the lower rear cover body, so that the lubricating grease can be conveniently and uniformly coated on the bearing; when antifriction bearing damages and needs to be changed, only need twist 6 connecting bolt soon to get off, take out back lid and back lid down respectively again, can realize the independent change of back lid and lower back lid, perhaps whole change compares with the roll formula bearing body back lid of current integral type structure, has labour saving and time saving, makes things convenient for the dismouting, reduce cost.

Drawings

FIG. 1 is a front view of the split type rear cover of the rolling bearing body of the double-suction centrifugal pump of the present invention;

FIG. 2 is a schematic structural diagram of the split type rear cover of the rolling bearing body of the double-suction centrifugal pump of the present invention;

fig. 3 is a bottom view of the upper rear cover of the present invention;

fig. 4 is a front view of the upper rear cover body of the present invention;

FIG. 5 is a cross-sectional view at A-A of FIG. 3;

fig. 6 is a front view of the lower rear cover of the present invention.

Detailed Description

The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to fig. 6, and the split type rear cover of the rolling bearing body of the double-suction centrifugal pump of the present embodiment includes an upper rear cover body 1 and a lower rear cover body 2, the upper rear cover body 1 and the lower rear cover body 2 are connected through a first connecting portion and a second connecting portion to form a disc-shaped rear cover, the first connecting portion is a protrusion 11 processed on a section of one side of the upper rear cover body 1 facing the lower rear cover body 2, the second connecting portion is a groove 21 processed on a section of one side of the upper rear cover body 1 facing the lower rear cover body 2, a threaded hole 3 is formed in the center of the disc-shaped rear cover, and the threaded hole 3 is in threaded fit with a rotating shaft of the double.

The second embodiment is as follows: the embodiment is described with reference to fig. 1, fig. 2, fig. 4 and fig. 6, in which a plurality of connecting through holes 4 are uniformly distributed on the front end surface B of the disc-shaped rear cover in an annular array, and the connecting through holes 4 correspond to bearing back caps installed inside a bearing body one to one. So set up, adopt connecting bolt to pass connecting hole 4 on last back lid 1 and the lower back lid 2 and with the bearing back of the body cap threaded connection of bearing internal installation, realized being connected of back lid and bearing body, the dismouting of being convenient for. Other components and connections are the same as in the first embodiment.

The front end face of the upper rear cover body 1 of the embodiment is provided with 3 connecting through holes 4; the front end face of the lower rear cover body 2 is provided with 3 connecting through holes 4.

The third concrete implementation mode: referring to fig. 3, the disc-shaped rear cover of the present embodiment has a water retaining ring 5 formed on a rear end surface C, and an assembly through hole 51 is formed in a center of a rear end surface D of the water retaining ring 5, wherein the assembly through hole 51 is coaxial with the threaded hole 3. So set up, retaining ring 5 plays sealed effect with back lid formula structure as an organic whole, has water to gradually go into the bearing when can avoiding the water pump operation. Other compositions and connections are the same as in the first or second embodiments.

The water retaining ring 5 of the present embodiment is formed by relatively splicing two semicircular rings into a whole circular ring, and the two semicircular rings are respectively integrated with the upper rear cover body 1 and the lower rear cover body 2.

The fourth concrete implementation mode: the embodiment is described with reference to fig. 3, an annular groove 52 is formed in the middle of an outer cylindrical surface of the water retaining ring 5, the diameter of the outer cylindrical surface of the water retaining ring 5 is 225mm, the thickness of the water retaining ring 5 is 16mm, the diameter of the annular groove 52 is 210mm, the groove width of the annular groove 52 is 10mm, the distance between an end surface E of the annular groove 52, which is far away from the disc-shaped rear cover, and a rear end surface D of the water retaining ring 5 is 3mm, and the distance between the rear end surface D of the water retaining ring 5 and the rear end surface C of the disc-shaped rear cover is 13 mm. Other compositions and connection relationships are the same as in the first, second or third embodiment.

The fifth concrete implementation mode: in the present embodiment, the crest diameter of the screw hole 3 is 136mm, the root diameter is 129mm, and the pitch is 4mm, as described with reference to fig. 3. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The sixth specific implementation mode: referring to fig. 1, 2, 4 and 6, the present embodiment is described, in which the upper rear cover body 1 and the lower rear cover body 2 of the present embodiment are both in a half-disc structure, the upper rear cover body 1 and the lower rear cover body 2 are connected to form a whole disc structure, the outer diameter of the disc-shaped rear cover is 330mm, and the thickness of the disc-shaped rear cover is 22 mm. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: the present embodiment is described with reference to fig. 3 to 6, in which the cross section of the protrusion 11 is rectangular, the groove 21 is a rectangular groove, and the protrusion 11 and the groove 21 are in clearance fit. So set up, on the one hand can avoid the water pump to go into gradually when operation, and on the other hand can also play back lid 1 and the tangent plane fixed action of lid 2 down. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

The protrusion 11 of the present embodiment may be formed as an annular protrusion according to actual conditions, and the groove 21 engaged with the annular protrusion may be formed as an annular groove.

The specific implementation mode is eight: the present embodiment will be described with reference to fig. 4 and 5, in which the projection 11 of the present embodiment has a thickness of 5mm and a height of 5 mm. Other compositions and connection relationships are the same as those of embodiment one, two, three, four, five, six or seven.

Principle of operation

The working principle of the split type rear cover of the rolling bearing body of the double-suction centrifugal pump of the present invention is described with reference to fig. 1 to 6: the utility model discloses be applied to 24SH-9A model double entry centrifugal pump rolling bearing body. During operation, the upper rear cover body 1 and the lower rear cover body 2 are oppositely buckled on a rotating shaft of the double-suction centrifugal pump from the upper side and the lower side respectively, the tangent planes of the upper rear cover body 1 and the lower rear cover body 2 are connected through a first connecting part and a second connecting part, the upper rear cover body 1 and the lower rear cover body 2 are respectively installed on a bearing body through 6 connecting bolts, and the connecting bolts are in threaded connection with a bearing back cap installed inside the bearing body.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a split type back lid of double entry centrifugal pump rolling bearing body which characterized in that: it includes back lid (1) and lower back lid (2), goes up back lid (1) and forms the lid after the disc through first connecting portion and second connecting portion connection with lower back lid (2), protruding (11) of processing on lid (2) one side tangent plane after first connecting portion are last back lid (1) orientation down, recess (21) of processing on lid (1) one side tangent plane after second connecting portion are for back lid (2) orientation down, screw hole (3) have been seted up at the center of lid behind the disc, screw hole (3) and the pivot screw-thread fit of double suction centrifugal pump.

2. The split type rear cover of the rolling bearing body of the double suction centrifugal pump according to claim 1, characterized in that: a plurality of connecting through holes (4) are uniformly distributed on the front end face (B) of the disc-shaped rear cover in an annular array mode, and the connecting through holes (4) are in one-to-one correspondence with bearing back caps installed inside the bearing body.

3. The split type rear cover of the rolling bearing body of the double suction centrifugal pump according to claim 2, characterized in that: the disc-shaped rear cover is characterized in that a water retaining ring (5) is processed on the rear end face (C), an assembling through hole 51 is processed in the center of the rear end face (D) of the water retaining ring (5), and the assembling through hole 51 and the threaded hole (3) are coaxially arranged.

4. The split type rear cover of the rolling bearing body of the double suction centrifugal pump according to claim 3, wherein: annular groove (52) are processed at the middle part of water retaining ring (5) outer cylinder face, the excircle diameter of water retaining ring (5) is 225mm, the thickness of water retaining ring (5) is 16mm, the diameter of annular groove (52) is 210mm, the groove width of annular groove (52) is 10mm, the distance between disc rear cover side end face E and water retaining ring (5) rear end face (D) is kept away from in annular groove (52) is 3mm, the distance between water retaining ring (5) rear end face (D) and disc rear cover rear end face (C) is 13 mm.

5. The split type rear cover of the rolling bearing body of the double suction centrifugal pump according to claim 1 or 3, characterized in that: the crest diameter of the threaded hole (3) is 136mm, the root diameter is 129mm, and the thread pitch is 4 mm.

6. The split type rear cover of the rolling bearing body of the double suction centrifugal pump according to claim 1, characterized in that: go up back lid (1) and down back lid (2) and be the semicircle disc structure, go up back lid (1) and form a whole disc structure after being connected with back lid (2) down, the external diameter of lid is 330mm behind the disc, the thickness of lid is 22mm behind the disc.

7. The split type rear cover of the rolling bearing body of the double suction centrifugal pump according to claim 6, wherein: the cross section of the protrusion (11) is rectangular, the groove (21) is a rectangular groove, and the protrusion (11) and the groove (21) are in clearance fit.

8. The split type rear cover of the rolling bearing body of the double suction centrifugal pump according to claim 7, wherein: the thickness of the bulge (11) is 5mm, and the height is 5 mm.