CN216447166U - Silicon carbide bearing structure for canned motor pump - Google Patents
Silicon carbide bearing structure for canned motor pump Download PDFInfo
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- CN216447166U CN216447166U CN202122899382.4U CN202122899382U CN216447166U CN 216447166 U CN216447166 U CN 216447166U CN 202122899382 U CN202122899382 U CN 202122899382U CN 216447166 U CN216447166 U CN 216447166U
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Abstract
The utility model relates to a silicon carbide bearing structure for a canned motor pump, which comprises a shaft sleeve, a bearing seat and an outer elastic bushing, wherein the shaft sleeve, the bearing and the bearing seat are sequentially sleeved on a pump shaft; wherein the outer elastic lining sleeve comprises a lining sleeve body, an annular inner supporting beam arranged on the inner surface of the lining sleeve body and an annular outer supporting beam arranged on the outer surface of the lining sleeve body in parallel; an annular buffer groove is formed between adjacent annular outer supporting beams, and the annular inner supporting beams and the annular buffer groove are oppositely arranged on the inner surface and the outer surface of the lining body. Compared with the prior art, the utility model utilizes the elastic materials of the inner elastic shaft sleeve and the outer elastic bush to generate adaptive deformation so as to offset or relieve unequal deformation generated between the pump shaft and the shaft sleeve and between the bearing and the bearing seat along the radial direction due to temperature change, and further generate inward pressing strength to the bearing and outward expansion strength to the shaft sleeve, thereby avoiding the problems of crushing of the silicon carbide bearing or expansion and breakage of the silicon carbide shaft sleeve.
Description
Technical Field
The utility model belongs to the technical field of canned motor pumps, and relates to a silicon carbide bearing structure for canned motor pumps.
Background
The traditional shield pump bearing uses graphite impregnated resin material, and forms a friction pair together with a shaft sleeve and a thrust disc of stellite hard alloy which are welded on the surface. The graphite has low hardness, poor wear resistance and poor corrosion resistance, so the graphite is difficult to be applied to the conveying work of high-viscosity or strong-corrosion media. The silicon carbide has the advantages of excellent chemical corrosion resistance, ultrahigh mechanical strength, good wear resistance, high temperature resistance, good self-lubricating property and the like, and is widely applied in recent years in the field of canned motor pumps, particularly as a bearing material. However, as the bearing of the canned motor pump, a large amount of heat is generated in the high-speed rotation process, and because the silicon carbide bearing and the metal pump shaft have different thermal expansion coefficients, the silicon carbide bearing is relatively small in material and brittle, and is easily cracked by the metal pump shaft, so that the service life of the pump is shortened, or safety accidents and other problems occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a silicon carbide bearing structure for a canned motor pump.
The purpose of the utility model can be realized by the following technical scheme:
a silicon carbide bearing structure for a canned motor pump comprises a shaft sleeve, a bearing seat and an outer elastic bushing, wherein the shaft sleeve, the bearing and the bearing seat are sequentially sleeved on a pump shaft;
the outer elastic bushing comprises a bushing body, an annular inner supporting beam arranged on the inner surface of the bushing body and extending along the circumferential direction, and annular outer supporting beams which are arranged on the outer surface of the bushing body in parallel and extend along the circumferential direction respectively;
an annular buffer groove is formed between adjacent annular outer supporting beams, and the annular inner supporting beam and the annular buffer groove are oppositely arranged on the inner surface and the outer surface of the lining body.
Furthermore, a plurality of elastic expansion grooves are distributed on the annular inner supporting beam along the circumferential direction, and the elastic expansion grooves respectively penetrate through the annular inner supporting beam along the axial direction and the radial direction.
Furthermore, the elastic expansion groove is a straight groove arranged in parallel to the axial direction, and two ends of the straight groove are respectively provided with an outer processing hole in a penetrating manner.
Further, the aperture of the outer processing hole is larger than the circumferential width of the straight groove.
Furthermore, an inner elastic shaft sleeve is further arranged between the shaft sleeve and the pump shaft, elastic inner supporting ring platforms are respectively arranged on the inner surfaces of two ends of the inner elastic shaft sleeve, an elastic outer supporting ring platform is arranged on the outer surface of the inner elastic shaft sleeve, and the elastic outer supporting ring platform is arranged between the elastic inner supporting ring platforms.
Furthermore, the front end of the inner elastic shaft sleeve is provided with a front expanding groove extending backwards along the axial direction, and the rear end of the inner elastic shaft sleeve is provided with a rear expanding groove extending forwards along the axial direction;
the extension lengths of the front expanding groove and the rear expanding groove are both greater than half of the axial length of the inner elastic shaft sleeve and penetrate through the side wall of the inner elastic shaft sleeve.
Furthermore, the front expansion grooves and the rear expansion grooves are circumferentially distributed on the inner elastic shaft sleeve in a staggered manner.
Further, preceding expansion groove and back expansion groove be straight type groove to the inner processing hole has all been seted up in extending the tip.
Further, the aperture of the inner processing hole is larger than the circumferential width of the straight groove.
Furthermore, the structure also comprises a thrust disc which is sleeved outside one end of the shaft sleeve and is in sliding contact with the end part of the bearing;
the thrust disc is provided with a shaft sleeve assembling groove, a plurality of assembling bosses are distributed on the inner wall of the shaft sleeve assembling groove at intervals along the circumferential direction, and the edges of two circumferential sides of each assembling boss are connected with the inner wall of the shaft sleeve assembling groove; the outer edge of one end of the shaft sleeve is provided with a plurality of assembling grooves matched with the assembling bosses, and the thrust disc is in rotating transmission connection with the shaft sleeve through the assembling bosses and the assembling grooves.
Compared with the prior art, the utility model has the following characteristics:
1) the elastic materials of the inner elastic shaft sleeve and the outer elastic bush are utilized to generate adaptive deformation so as to offset or relieve unequal deformation generated between the pump shaft and the shaft sleeve and between the bearing and the bearing seat along the radial direction due to temperature change, and further generate inward pressing strength of the bearing and outward expansion strength of the shaft sleeve, thereby avoiding the problems of crushing of the silicon carbide bearing or expansion and breakage of the silicon carbide shaft sleeve; meanwhile, the clearance between the bearing and metal parts such as a pump shaft and the like is eliminated, and the service life of the silicon carbide bearing is effectively protected and prolonged;
2) according to the utility model, the supporting ring tables or the supporting beams are arranged in an internal-external staggered manner, so that the opposite sides of the supporting ring tables or the supporting beams form corresponding buffer grooves, the assembly supporting effect is ensured, meanwhile, a buffer space is further provided, and the buffer deformation effect is ensured;
3) according to the utility model, the annular inner support beam and the inner elastic bushing are provided with the plurality of expansion grooves in a penetrating manner, so that the silicon carbide bearing is prevented from being crushed due to the over-strong elastic action of the outer elastic bushing, and the elastic acting force of the fixed material bushing is adjusted by adjusting the number of the expansion grooves;
4) through holes are respectively arranged at two ends of the expansion groove in a penetrating manner, so that on one hand, the expansion groove is used as a machining through hole to facilitate the machining and forming of the expansion groove, and the machining convenience is improved; on the other hand, the end part of the expansion groove is passivated, so that the expansion groove is prevented from further extending when expanding, and the lining is prevented from cracking;
5) the two ends of the elastic bushing are provided with the slots (expanding slots) to form a unique semi-split structure, so that the elastic bushing has a wider application range in the aspects of size and temperature;
6) the concave-convex matching structure between the assembly boss and the assembly groove ensures the transmission effect of the rotating torque between the thrust disc and the shaft sleeve, and avoids the defect that the shaft sleeve is easy to break due to stress concentration after the opening of fragile materials such as silicon carbide and the like, so that the shaft sleeve is safer and more reliable.
Drawings
FIG. 1 is an axial cross-sectional view of a silicon carbide bearing structure for a canned motor pump in an example;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an axial cross-sectional view of the outer elastomeric bushing;
FIG. 4 is a radial view of the outer elastomeric bushing;
FIG. 5 is an axial cross-sectional view of the inner elastomeric bushing;
FIG. 6 is a radial view of the inner elastomeric bushing;
FIG. 7 is a radial view of the thrust disk;
FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7;
FIG. 9 is an axial cross-sectional view of the bushing;
FIG. 10 is a radial view of the bushing;
FIG. 11 is an axial cross-sectional view of the bearing;
FIG. 12 is a radial view of the bearing;
the notation in the figure is:
1-pump shaft, 2-shaft sleeve, 201-assembly groove, 3-bearing, 4-bearing seat, 5-outer elastic bushing, 501-bushing body, 502-annular inner support beam, 503-annular outer support beam, 504-annular buffer groove, 505-elastic expansion groove, 506-outer processing hole, 6-inner elastic bushing, 601-elastic inner support ring platform, 602-elastic outer support ring platform, 603-front expansion groove, 604-rear expansion groove, 605-inner processing hole, 7-thrust disc, 701-shaft sleeve assembly groove and 702-assembly boss.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example (b):
fig. 1 and 2 show a silicon carbide bearing structure for a canned motor pump, which includes an inner elastic bushing 6, a shaft sleeve 2, a bearing 3 (the structure is shown in fig. 10 and 11), an outer elastic bushing 5, a bearing seat 4, and a thrust disc 7, wherein the inner elastic bushing 6, the shaft sleeve 2, the bearing 3, the outer elastic bushing 5, the bearing seat 4, and the thrust disc 7 are sequentially sleeved on one end of the shaft sleeve 2 and are in sliding contact with the end of the bearing 3. The shaft sleeve 2 and the bearing 3 are made of silicon carbide, the inner elastic bushing 6 and the outer elastic bushing 5 are made of stainless steel, and the pump shaft 1 and the bearing block 4 are made of stainless steel.
As shown in fig. 3 and 4, the outer elastic bushing 5 includes a bushing body 501, 2 annular inner supporting beams 502 juxtaposed on the inner surface of the bushing body 501 and extending in the circumferential direction, and 3 annular outer supporting beams 503 juxtaposed on the outer surface of the bushing body 501 and extending in the circumferential direction; an annular buffer groove 504 is formed between adjacent annular outer support beams 503, and the annular inner support beam 502 and the annular buffer groove 504 are disposed on the inner and outer surfaces of the liner body 501 opposite to each other.
As shown in fig. 5 and 6, the inner elastic bushing 6 has an inner elastic supporting ring 601 respectively disposed on the inner surfaces of the two ends thereof, an outer elastic supporting ring 602 is disposed on the outer surface of the inner elastic bushing 6, and the outer elastic supporting ring 602 is disposed between the inner elastic supporting ring 601.
When unequal deformation is generated between the pump shaft 1 and the shaft sleeve 2 and between the bearing 3 and the bearing seat 4 along the radial direction due to temperature change, the elastic materials of the inner elastic bushing 6 and the outer elastic bushing 5 can be utilized to generate adaptive deformation so as to offset or relieve the inward pressing strength of the bearing 3 and the outward expansion strength of the shaft sleeve 2, and therefore the problem that the silicon carbide bearing 3 is crushed or the silicon carbide shaft sleeve 2 is expanded and broken is solved.
And the supporting ring platform or the supporting beam which are arranged in an internal-external staggered manner form a corresponding buffer groove on the opposite side of the supporting ring platform or the supporting beam, so that the assembly supporting effect is ensured, meanwhile, a buffer space is further provided, and the buffer deformation effect is ensured.
In order to avoid the silicon carbide bearing 3 from being crushed by the over-strong elastic action of the outer elastic bushing 5, a plurality of elastic expansion grooves 505 are circumferentially distributed on the annular inner supporting beam 502, and each elastic expansion groove 505 is a straight groove arranged in parallel to the axial direction and respectively penetrates through the annular inner supporting beam 502 along the axial direction and the radial direction. Similarly, the front end of the inner elastic bushing 6 is provided with a front expanding groove 603 extending axially backwards, and the rear end is provided with a rear expanding groove 604 extending axially forwards; the front expansion grooves 603 and the rear expansion grooves 604 are circumferentially and alternately arranged on the inner elastic bushing 6, and the two expansion grooves are also straight grooves, and have an extension length of 3/4 of the axial length of the inner elastic bushing 6 and penetrate through the side wall of the inner elastic bushing 6.
In order to improve the processing convenience of the elastic expansion groove 505, the front expansion groove 603 and the rear expansion groove 604 and avoid further extension when the expansion groove expands, so that the bushing cracks, an outer processing hole 506 and an inner processing hole 605 are penetratingly formed at the end part of the expansion groove, so that the end part of the expansion groove is passivated, the aperture of the processing hole is larger than the circumferential width of the corresponding expansion groove, and the aperture of the processing hole in the embodiment is about 4 times of the circumferential width of the expansion groove.
As shown in fig. 7 and 8, the thrust disk 7 is further provided with a sleeve assembly groove 701, 5 assembly bosses 702 are arranged on the inner wall of the sleeve assembly groove 701 at equal intervals along the circumferential direction, and two side edges of each assembly boss 702 in the circumferential direction are connected with the inner wall of the sleeve assembly groove 701; as shown in fig. 9 and 10, the thrust disk 7 of the assembly groove 201, which is matched with the assembly boss 702, is arranged on the outer edge of one end of the shaft sleeve 2, and the shaft sleeve 2 complete the transmission of the rotation torque through the assembly boss 702 and the assembly groove 201, and the defect that the brittle material silicon carbide is easy to break after opening is avoided, so that the shaft sleeve 2 is safer and more reliable.
The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A silicon carbide bearing structure for a canned motor pump is characterized by comprising a shaft sleeve (2), a bearing (3), a bearing seat (4) and an outer elastic bushing (5), wherein the shaft sleeve (2), the bearing (3) and the bearing seat (4) are sequentially sleeved on a pump shaft (1);
the outer elastic bushing (5) comprises a bushing body (501), an annular inner supporting beam (502) which is arranged on the inner surface of the bushing body (501) and extends along the circumferential direction, and annular outer supporting beams (503) which are arranged on the outer surface of the bushing body (501) in parallel and extend along the circumferential direction respectively;
an annular buffer groove (504) is formed between adjacent annular outer supporting beams (503), and the annular inner supporting beam (502) and the annular buffer groove (504) are oppositely arranged on the inner surface and the outer surface of the lining body (501).
2. The silicon carbide bearing structure for the canned motor pump according to claim 1, wherein a plurality of elastic expansion grooves (505) are circumferentially arranged on the annular inner supporting beam (502), and the elastic expansion grooves (505) respectively penetrate through the annular inner supporting beam (502) in the axial direction and the radial direction.
3. The silicon carbide bearing structure for the canned motor pump according to claim 2, wherein the elastic expansion groove (505) is a straight groove disposed parallel to the axial direction, and outer processing holes (506) are respectively formed through both ends of the straight groove.
4. The silicon carbide bearing structure for a canned motor pump according to claim 3, wherein the outer machining hole (506) has a diameter larger than the circumferential width of the straight groove.
5. The silicon carbide bearing structure for the canned motor pump according to claim 1, wherein an inner elastic bushing (6) is further disposed between the shaft sleeve (2) and the pump shaft (1), inner elastic support ring platforms (601) are respectively disposed on inner surfaces of two ends of the inner elastic bushing (6), an outer elastic support ring platform (602) is disposed on an outer surface of the inner elastic bushing (6), and the outer elastic support ring platform (602) is disposed between the inner elastic support ring platforms (601).
6. The silicon carbide bearing structure for the canned motor pump according to claim 5, wherein the inner elastic bushing (6) has a front expanding groove (603) extending axially rearward at a front end thereof and a rear expanding groove (604) extending axially forward at a rear end thereof;
the extension lengths of the front expanding groove (603) and the rear expanding groove (604) are both greater than half of the axial length of the inner elastic bushing (6), and both penetrate through the side wall of the inner elastic bushing (6).
7. The silicon carbide bearing structure for the canned motor pump according to claim 6, wherein the front expanding grooves (603) and the rear expanding grooves (604) are circumferentially staggered on the inner elastic bushing (6).
8. The silicon carbide bearing structure for the canned motor pump according to claim 6, wherein the front expansion groove (603) and the rear expansion groove (604) are straight grooves, and inner processing holes (605) are formed through the extending ends.
9. The silicon carbide bearing structure for a canned motor pump according to claim 8, wherein the bore diameter of the inner machining hole (605) is larger than the circumferential width of the straight groove.
10. The silicon carbide bearing structure for the canned motor pump according to claim 1, further comprising a thrust disk (7) sleeved outside one end of the sleeve (2) and in sliding contact with the end of the bearing (3);
the thrust disc (7) is provided with a shaft sleeve assembly groove (701), the inner wall of the shaft sleeve assembly groove (701) is provided with a plurality of assembly bosses (702) at intervals along the circumferential direction, and the edges of two circumferential sides of each assembly boss (702) are connected with the inner wall of the shaft sleeve assembly groove (701);
the outer edge of one end of the shaft sleeve (2) is provided with a plurality of assembling grooves (201) matched with the assembling bosses (702).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122899382.4U CN216447166U (en) | 2021-11-24 | 2021-11-24 | Silicon carbide bearing structure for canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122899382.4U CN216447166U (en) | 2021-11-24 | 2021-11-24 | Silicon carbide bearing structure for canned motor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216447166U true CN216447166U (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122899382.4U Active CN216447166U (en) | 2021-11-24 | 2021-11-24 | Silicon carbide bearing structure for canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216447166U (en) |
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2021
- 2021-11-24 CN CN202122899382.4U patent/CN216447166U/en active Active
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