CN-122014664-A - High Wen Youjiang pump capable of being maintained in disassembling-free mode and maintenance method thereof

CN122014664ACN 122014664 ACN122014664 ACN 122014664ACN-122014664-A

Abstract

The invention provides a high Wen Youjiang pump capable of being maintained in a disassembling-free manner and a maintenance method thereof, which are used for solving the technical problems that an impeller of the existing high Wen Youjiang pump is usually subjected to wear-resistant protection by adopting an impeller ring, on one hand, the impeller ring is possibly loosened due to thermal expansion difference or material engagement tendency, and on the other hand, when the impeller ring is worn and needs to be replaced, parts such as a bearing box body, a pump cover, an inner pump cover and the like are required to be completely disassembled. In addition, the invention circumferentially sets a plurality of adjusting blocks between the bearing box and the bearing box body, which are matched with the wear-resistant surface of the impeller, so that when the sealing gap between the impeller and the wear-resistant volute is enlarged, the thickness of the adjusting blocks is only required to be adjusted after the adjusting blocks are disassembled, and the sealing gap between the impeller and the wear-resistant volute can be returned to the standard sealing gap value, thereby greatly shortening the maintenance time.

Inventors

ZHANG GAOZHENG
FU YUEFENG
JIANG KE
WANG GUI
ZHANG YANG
QI WEN
REN ZIJUN
ZHANG XIAOLONG
ZHANG FAJIE
MA LUOSHAN
XI NINGGANG
DUAN PENGFEI
LU BIAO

Assignees

陕西航天动力高科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260302

Claims (8)

1. The high Wen Youjiang pump capable of being maintained in a disassembling-free mode comprises a bearing box (1), a pump shaft (3), a bearing box body (4), a sealing shaft sleeve (5), a pump cover (6), an inner pump cover (7), an impeller (8), a wear-resistant volute (9) and a gland (11), wherein the bearing box (1), the bearing box body (4), the pump cover (6), the inner pump cover (7) and the impeller (8) are coaxially arranged outside the pump shaft (3) from a driving end to a non-driving end in sequence, the sealing shaft sleeve (5) is coaxially arranged on the outer side wall of a sealing section of the pump shaft (3) at a position corresponding to the inner sides of the bearing box body (4) and the pump cover (6) and used for achieving radial sealing of the pump shaft (3), the wear-resistant volute (9) is coaxially arranged on the outer side of the impeller (8), axial sealing is achieved between the impeller (8) and the wear-resistant volute (9) through a sealing gap, and the gland (11) is arranged at the outer end of the bearing box (1), and is characterized in that: The device also comprises N adjusting blocks (2), wherein N is more than or equal to 3; The N adjusting blocks (2) are circumferentially and uniformly connected between the bearing box (1) and the bearing box body (4), and the adjusting blocks (2) are detachably connected with the bearing box (1) and the bearing box body (4); The surface of the impeller (8) is integrally provided with a wear-resistant surface, the impeller (8) and the wear-resistant volute (9) are in sealing connection through a sealing gap, the thickness of the adjusting block (2) is adjustable, and the thickness adjusting amount of the adjusting block is equal to the increasing amount of the sealing gap between the impeller (8) and the wear-resistant volute (9).
2. A maintenance free high Wen Youjiang pump as defined in claim 1 wherein: a plurality of annular grooves (81) are uniformly distributed on the wear-resistant surface of the impeller (8) at positions corresponding to the length direction of the sealing gap.
3. A maintenance free high Wen Youjiang pump as defined in claim 2 wherein: The depth H of the annular groove (81) is more than or equal to 2L, the width D of the annular groove is more than or equal to H, and the L is the width of the sealing gap; the number n=of annular grooves (81) S is the length of the seal gap.
4. A maintenance free high Wen Youjiang pump according to claim 3, wherein: The device also comprises M first fastening screws (12) and N second fastening screws (10), wherein M is more than or equal to 3; M first through holes are uniformly formed in the periphery of the gland (11), and first threaded holes are respectively formed in positions, corresponding to the first through holes, of the bearing box (1); M first fastening screws (12) respectively penetrate through a plurality of first through holes of the gland (11) to be connected with corresponding first threaded holes on the bearing box (1); the bearing box comprises a bearing box body (4), wherein a first through hole is formed in each adjusting block (2), a second through hole is formed in each adjusting block (2), a third through hole and a fourth through hole are formed in the gland (11) and the bearing box (1) at positions corresponding to the first through holes of each adjusting block (2), and second threaded holes are formed in the bearing box body (4) at positions corresponding to the second through holes of each adjusting block (2); n second fastening screws (10) respectively pass through a plurality of third through holes of the pressing cover (11), a plurality of fourth through holes of the bearing box (1) and a plurality of second through holes of the adjusting block (2) in sequence and are connected with corresponding second threaded holes on the bearing box body (4).
5. A maintenance free high Wen Youjiang pump according to any one of claims 1 to 4, wherein: the sealing section of the pump shaft (3) comprises a large-diameter sealing section (31), a conical transition section (32) and a small-diameter sealing section (33) which are sequentially arranged from a driving end to a non-driving end; The sealing shaft sleeve (5) comprises a first shaft sleeve section, a second shaft sleeve section and a third shaft sleeve section which are sequentially arranged from a driving end to a non-driving end; the first shaft sleeve section is matched with the large-diameter sealing section (31) to realize radial sealing, the second shaft sleeve section is in clearance fit with the conical transition section (32), and the third shaft sleeve section is matched with the small-diameter sealing section (33) to realize radial sealing.
6. A maintenance free high Wen Youjiang pump as defined in claim 5 wherein: m=4, n=4.
7. A method of maintenance of a maintenance-free high Wen Youjiang pump according to any one of claims 1 to 6, comprising the steps of: Step 1, after a sealing gap between an impeller (8) and a wear-resistant volute (9) is increased due to wear, an adjusting block (2) between a bearing box (1) and a bearing box body (4) is taken out; Step 2, pushing the pump shaft (3) to the non-driving end to the bottom, so that no gap exists between the impeller (8) and the wear-resistant volute (9), knocking the pump shaft (3) to enable the pump shaft to retract to the driving end, and measuring the retraction distance of the pump shaft (3) until the retraction distance is equal to a standard sealing gap value between the impeller (8) and the wear-resistant volute (9); And 3, measuring the distance between the bearing box (1) and the bearing box body (4), adjusting the thickness of the adjusting block (2) according to the distance between the bearing box (1) and the bearing box body (4), and installing the adjusted adjusting block (2) between the bearing box (1) and the bearing box body (4) to finish maintenance of the high Wen Youjiang pump.
8. The maintenance method of the high Wen Youjiang pump capable of being maintained in a disassembly-free manner according to claim 7, wherein: in the step 1, the adjusting block (2) between the bearing box (1) and the bearing box body (4) is taken out specifically: And removing the second fastening screws (10) to take out the adjusting block (2) between the bearing box (1) and the bearing box body (4).

Description

High Wen Youjiang pump capable of being maintained in disassembling-free mode and maintenance method thereof Technical Field The invention relates to a high Wen Youjiang pump and a maintenance method thereof, in particular to a high Wen Youjiang pump capable of being maintained in a disassembling-free mode and a maintenance method thereof. Background The high-temperature slurry pump is mainly used in special devices for conveying high temperature and containing solid particles in oil refineries, chemical plants and the like. The high temperature slurry pump is operated at high temperature and high flow rate, and the medium conveyed by the high temperature slurry pump is hot oil containing solid particles at the temperature of 330-450 ℃ and the flow rate of 450-500m < 3 >/h. Currently, impellers of high Wen Youjiang pumps are usually wear-resistant protected by impeller collars, which may loosen in high temperature media due to differences in thermal expansion or propensity for material bite. In addition, solid particles in a high-temperature medium are extremely easy to cause abrasion of an impeller ring, so that a gap between an impeller and a wear-resistant volute is enlarged, normal operation of a high Wen Youjiang pump is influenced, and even equipment is stopped for maintenance. And when impeller mouth ring is changed, only after parts such as the bearing box body, the pump cover, the inner pump cover and the like are required to be completely disassembled, the impeller mouth ring can be changed, the whole process is time-consuming and labor-consuming, and huge economic loss can be brought to enterprises due to equipment downtime. Disclosure of Invention The invention aims to solve the technical problems that the impeller of the existing high Wen Youjiang pump usually adopts an impeller ring for wear-resistant protection, on one hand, the impeller ring is possibly loosened due to the difference of thermal expansion or the biting tendency of materials, and on the other hand, when the impeller ring is worn and needs to be replaced, parts such as a bearing box body, a pump cover, an inner pump cover and the like are required to be completely disassembled, and provides a high Wen Youjiang pump capable of being maintained without disassembly and a maintenance method thereof. In order to achieve the above purpose, the technical scheme provided by the invention is as follows: The high Wen Youjiang pump capable of being maintained in a disassembly-free mode comprises a gland, a bearing box, a pump shaft, a bearing box body, a sealing shaft sleeve, a pump cover, an inner pump cover, an impeller and a wear-resistant volute, wherein the bearing box, the bearing box body, the pump cover, the inner pump cover and the impeller are sequentially and coaxially arranged outside the pump shaft from a driving end to a non-driving end; The N adjusting blocks are circumferentially and uniformly connected between the bearing box and the bearing box body, and the adjusting blocks are detachably connected with the bearing box and the bearing box body; The surface of the impeller is integrally provided with a wear-resistant surface, the impeller and the wear-resistant volute are in sealing connection through a sealing gap, the thickness of the adjusting block is adjustable, and the thickness adjusting amount of the adjusting block is equal to the increasing amount of the sealing gap between the impeller and the wear-resistant volute. Further, a plurality of annular grooves are uniformly distributed on the wear-resistant surface of the impeller at positions corresponding to the length direction of the sealing gap, so that the impeller is more resistant to scouring, and the sealing gap is not easy to be blocked. Further, the depth H of the annular groove is more than or equal to 2L, the width D of the annular groove is more than or equal to H, and the width L of the annular groove is the width of the sealing gap; The number n of annular grooves S is the length of the seal gap. Further, the screw rod further comprises M first fastening screws and N second fastening screws, wherein M is more than or equal to 3; M first through holes are uniformly formed in the periphery of the gland, and first threaded holes are respectively formed in positions, corresponding to the first through holes, on the bearing box; The N second fastening screws respectively pass through a plurality of third through holes of the gland, a plurality of fourth through holes of the bearing box and a plurality of second through holes of the adjusting blocks in sequence, and are connected with the corresponding second threaded holes on the bearing box. Further, the sealing section of the pump shaft comprises a large-diameter sealing section, a conical transition section and a small-diameter sealing section which are sequentially arranged from a driving end to a non-driving end; The sealing shaft sleeve comprises a first shaft sleeve section, a second shaft sleeve