CN113107894B - Centrifugal pump seal mouth ring with double adjustable spin - Google Patents

Centrifugal pump seal mouth ring with double adjustable spin Download PDF

Info

Publication number
CN113107894B
CN113107894B CN202110460234.4A CN202110460234A CN113107894B CN 113107894 B CN113107894 B CN 113107894B CN 202110460234 A CN202110460234 A CN 202110460234A CN 113107894 B CN113107894 B CN 113107894B
Authority
CN
China
Prior art keywords
ring
hole
loop bar
impeller
radius
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110460234.4A
Other languages
Chinese (zh)
Other versions
CN113107894A (en
Inventor
周文杰
陈梦婷
张聪
臧盛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dandong Shunsheng Mechanical Equipment Co ltd
Original Assignee
Jiangsu University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu University filed Critical Jiangsu University
Priority to CN202110460234.4A priority Critical patent/CN113107894B/en
Publication of CN113107894A publication Critical patent/CN113107894A/en
Application granted granted Critical
Publication of CN113107894B publication Critical patent/CN113107894B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a centrifugal pump sealing opening ring with double rows of adjustable rolling balls, which mainly comprises a circular ring, the rolling balls and a loop bar, wherein a plurality of hemispherical grooves are formed in the inner side wall of the circular ring along the circumferential direction, and the grooves are arranged in two rows in parallel in the radial direction; the rolling ball is internally provided with a through hole which passes through the ball center and is limited in the groove by a loop bar which passes through the through hole. When the matching relationship between the impeller and the sealing opening ring generates deviation, the invention can mutually rub the matching parts of the impeller and the sealing opening ring into rolling friction, thereby greatly reducing the friction force, reducing the abrasion of the pump body sealing ring and the impeller opening ring, prolonging the service life of the pump body sealing ring and the impeller opening ring and improving the volumetric efficiency of the water pump. The invention also has the advantage of easy maintenance, and when the rolling ball is seriously abraded, the rolling ball can be directly replaced, thereby saving the material and the cost.

Description

Centrifugal pump seal mouth ring with double adjustable spin
Technical Field
The invention relates to a centrifugal pump structure in the field of fluid machinery, in particular to a centrifugal pump sealing opening ring with double rows of adjustable rolling balls.
Background
The sealing opening ring is a key part of the centrifugal pump and is closely related to the overall efficiency of the centrifugal pump. The impeller and the sealing opening ring of the centrifugal water pump are a pair of matching parts, the existing parts are made of metal and are in hard matching with each other, the impeller is installed on a rotating shaft of the water pump, and the sealing opening ring is fixed on the volute. The traditional centrifugal pump impeller opening ring and pump body sealing ring structure is generally made of materials such as integral cast iron, 45 steel, stainless steel and the like, the wear resistance is not high, when the matching relation between the impeller and the sealing opening ring generates deviation, and the matching parts of the impeller and the sealing opening ring rub with each other, the sealing ring can be worn quickly and replaced frequently, and adhesion phenomenon can be generated in the operation process of the pump, so that the pump is damaged. When the abrasion is serious, the pump can be seized up, so that the pump can not be normally started, even the motor is burnt out, the sealing gap is enlarged, and the flow rate and the efficiency of the whole pump are sharply reduced. And the impeller and the sealing ring are a pair of water pump components which are matched with each other in wear resistance, and once worn, the impeller and the sealing ring are difficult to repair. And the cavity clearance between the sealing opening ring of the centrifugal pump and the front cover plate of the closed impeller and the pump worm shell is larger, so that the pressure difference between high-pressure fluid at the outlet of the impeller and low-pressure fluid at the inlet of the impeller is increased, and further, the fluid leakage is increased, and the overall efficiency of the pump is low.
In order to solve the above problems, a patent document proposes that the wear of the sealing surface can be effectively reduced by applying a new material to the friction surface by build-up welding, and the gap can be kept within a small range. Meanwhile, the liquid stored in the labyrinth seal groove has a lubricating effect on the sealing surface in turn, and the dry grinding and burning loss of the pump body seal ring and the impeller opening ring are prevented. However, the manufacturing steps are complicated, and the method is not suitable for industrial mass production. In addition, patent document CN 2541637Y discloses a self-compensating constant gap sealing structure for a centrifugal pump orifice ring, which can make the impeller and the seal orifice ring generate soft elastic fit with each other, make the gap between the impeller and the seal orifice ring unchanged along with the increase of the wear degree of components, and self-compensate wear under the action of pressure, thereby maintaining the original constant gap, achieving the sealing effect, and better solving the defect of wear and leakage of the impeller and the seal orifice ring caused by the hard fit between the impeller and the seal orifice ring.
Disclosure of Invention
The invention provides a centrifugal pump sealing opening ring with double rows of adjustable rolling balls, and aims to reduce the friction force between an impeller and the sealing opening ring and increase an adjustable structure, so that the defects of high abrasion, frequent replacement and the like are overcome, and the overall efficiency of a pump is improved.
The present invention achieves the above-described object by the following means.
A centrifugal pump sealing opening ring with double-row adjustable rolling balls is used for being assembled between a volute and an impeller of a centrifugal pump and is characterized by mainly comprising a circular ring, the rolling balls and a loop bar,
a plurality of hemispherical grooves are formed in the inner side wall of the circular ring along the circumferential direction, and two rows of grooves are distributed in parallel in the radial direction;
the rolling ball is provided with a first through hole penetrating through the ball center, is positioned in the groove and is limited in the groove by a sleeve rod penetrating through the first through hole.
Furthermore, a second through hole which penetrates through the groove and is axially parallel to the circular ring is formed in the circular ring, the loop bar penetrates through the second through hole, and two ends of the loop bar are fixed by fixing nuts.
Furthermore, the upper top end and the lower top end of the loop bar are provided with external threads which are matched with the internal threads of the fixing nut to fix the loop bar.
Further, the tightening direction of the connection part of the external thread and the internal thread is the same as the moving direction of the impeller relative to the rolling ball, so that the loop bar is ensured to be in a fastening state.
Furthermore, the grooves are arranged in two rows in parallel, and the number of the hemispherical grooves on the inner side wall of the circular ring is 16-20; the ball is made of 20 steel.
Furthermore, the radius R of the inner wall of the circular ring is 0.55 to 0.6 time of the radius of the inlet of the impeller, the radial thickness e of the circular ring is 0.06 to 0.12 time of the radius R of the inner wall of the circular ring, and the width b of the circular ring in the axial direction is 0.30 to 0.40 time of the radius R of the inner wall of the circular ring; the radius r of the rolling ball is 0.15-0.2 times of the width b of the circular ring in the axial direction.
Furthermore, a radial gap of 0.6-1.1 mm is formed between the outermost side of the rolling ball and the outer side wall of the front cover plate of the impeller.
Furthermore, the second through hole is positioned in the circular ring, the radial width of the second through hole and the inner wall of the circular ring is 0.8-1.2 mm, and the radius of the first through hole and the radius of the second through hole are 0.30-0.50 times of the radius r of the rolling ball.
Further, a radial gap of 0.4-0.8 mm is formed between the inner wall of the groove and the outer wall of the rolling ball.
Further, the radius r of the loop bar at the middle section corresponding to the second through hole between the two grooves 2 Greater than the radius r of the two side parts 1 The radial clearance between the middle section of the loop bar and the second through hole between the two grooves is 0.1-0.3 mm, and the radial clearance between the parts at two sides of the middle section of the loop bar and the first through hole and the second through hole is 0.5-0.8 mm.
The beneficial effects of the invention are:
1. the rolling ball is arranged on the sealing opening ring, and when the matching relation between the impeller and the sealing opening ring generates deviation, the mutual friction of the matching parts of the impeller and the sealing opening ring is rolling friction, so that the friction force generated by the friction is greatly reduced compared with the traditional sealing sliding friction, and the purposes of reducing the abrasion of the sealing ring of the pump body and the impeller, prolonging the service life of the sealing ring of the pump body and the impeller and improving the volumetric efficiency of the water pump are achieved.
2. The rolling ball is made of 20 steel and is poor in wear resistance compared with materials such as cast iron, 45 steel and stainless steel which are commonly used for the impeller, when friction is generated, the rolling ball is damaged, the integrity of the impeller is guaranteed, and the eccentric direction can be judged according to the wear degree of the rolling ball at each position. Meanwhile, the ball adjusting device has an adjustable function, when severely worn rolling balls appear, the rolling balls can be directly replaced, so that the material and the cost are saved, and the complexity of frequently replacing the sealing rings is also saved.
3. The rolling balls are arranged in a staggered mode, so that the leakage amount at the impeller can be effectively reduced, and the rolling balls have more excellent sealing performance.
Drawings
FIG. 1 is a schematic view of the mounting position of the seal lip ring of the present invention on a centrifugal pump.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic perspective view of a seal ring according to the present invention.
FIG. 4 is a front view of the seal split ring of the present invention.
FIG. 5 is a partially developed block diagram of the inner surface of the seal lip ring according to the present invention.
Fig. 6 is a perspective view of the loop bar.
Fig. 7 is a perspective view of the fixing nut.
In the figure:
1. a circular ring; 2. fixing a nut; 3. rolling a ball; 4. a volute; 5. an impeller; 6. a loop bar; 7. a groove; 8. a first through hole; 9. a second through hole; 10. the middle section of the loop bar; 11. external threads of the loop bar; 12. and fixing the internal thread of the nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1 and 2, the centrifugal pump sealing opening ring with the double rows of adjustable rolling balls is used for being installed between a volute 4 and an impeller 5 of a centrifugal pump, and the installation requires that the central shaft of the ring 1 is collinear with the central shaft of the impeller 5. A radial gap of 0.6-1.1 mm is formed between the outermost side of the rolling ball 3 and the outer side wall of the front cover plate of the impeller 5. And the non-contact installation is adopted, and the rolling balls 3 on the circular ring 1 are not in contact with the impeller 5. The rolling ball 3 is arranged side by side, so that the leakage amount at the impeller can be effectively reduced, and the sealing performance is more excellent.
Specifically, the structure of the sealing opening ring of the invention is shown in fig. 2 and 3, and comprises a circular ring 1, a fixing nut 2, a rolling ball 3 and a loop bar 6. 16-20 hemispheric grooves 7 are uniformly distributed on the inner side wall of the circular ring 1 along the circumferential direction, and two rows of grooves 7 are distributed side by side in the radial direction. The rolling ball 3 is provided with a first through hole 8 penetrating through the center of the ball, and the rolling ball 3 is positioned in the groove 7 and limited in the groove 7 by a loop bar 6 penetrating through the first through hole 8. The radial clearance of 0.4-0.8 mm is arranged between the side wall of the hemispherical groove 7 and the outer side wall of the rolling ball 3, so that the rolling ball 3 can roll, the impeller and the rolling ball arranged on the sealing opening ring are mutually rubbed into rolling friction, and compared with the traditional sealing sliding friction, the friction force generated by the rolling ball is greatly reduced, thereby achieving the purposes of reducing the abrasion of the pump body sealing ring and the impeller opening ring, prolonging the service life of the pump body sealing ring and the impeller opening ring and improving the volumetric efficiency of the water pump.
Specifically, the ring 1 is provided with a second through hole 9 which is formed by penetrating through the groove 7 and is axially parallel to the ring 1, the loop bar 6 penetrates through the second through hole 9, and two ends of the loop bar are fixed by the fixing nuts 2. When the severely worn rolling ball 3 appears, the rolling ball 3 can be directly replaced, and the trouble of frequently replacing the sealing ring is also saved. As shown in figure 7, the height of the fixed nut 2 is 1.5-2 mm, the fixed nut is arranged on the upper side and the lower side of the circular ring, the internal thread 12 of the fixed nut is in threaded connection with the external thread 11 of the loop bar 6 in a matching way, and the connection matching can be freely disassembled. The tightening direction of the joint of the external thread 11 and the internal thread 12 is the same as the moving direction of the impeller 5 relative to the rolling ball 3, so that the loop bar is ensured to be in a fastening state.
Referring to fig. 4 and 5, the radius R of the inner wall of the ring 1 is 0.55 to 0.6 times the diameter of the inlet of the impeller 5, and the radial thickness e of the ring 1 is 0.06 to 0.12 times the radius R. The height b of the ring 1 in the axial direction is 0.30 to 0.4 times of the radius R. The number of the balls 3 is the same as that of the grooves 7 on the inner side wall of the circular ring 1. The rolling ball 3 is a ball made of 20 steel, the 20 steel has poor wear resistance relative to the impeller 5 made of common cast iron, 45 steel, stainless steel and other materials, the integrity of the impeller 5 is ensured, and the eccentric direction can be judged according to the wear degree of the rolling ball 3 at each position. The radius R of the rolling ball 3 is 0.15-0.2 times of the width b of the circular ring 1 in the axial direction, and the radius of the first through hole 8 is 0.30-0.50 times of the radius R of the rolling ball 3.
Referring to fig. 6 and 7, the upper and lower top ends of the loop bar 6 are provided with external threads 11 which can be connected and detached with the fixing nut 2, the lower end of the fixing nut 2 is provided with internal threads 12 which are matched with the external threads 11 at the upper and lower ends of the loop bar, so that the loop bar and the rolling ball can be freely detached, and the tightening direction of the threaded connection is the same as the moving direction of the impeller 5 relative to the rolling ball 3, thereby ensuring that the loop bar is in a fastening state. The upper end and the lower end of the loop bar 6 are respectively fixed above and below the outer side wall of the circular ring 1.
As shown in FIG. 6, the radius r of the loop bar 6 at the middle section corresponding to the second through hole 9 between the two grooves 7 2 Greater than the radius r of the two side parts 1 The radial clearance between the middle section of the loop bar 6 and the second through hole 9 between the two grooves 7 is 0.1-0.3 mm, and the radial clearance between the parts at two sides of the middle section of the loop bar 6 and the first through hole 8 and the second through hole 9 is 0.5-0.8 mm, so that the rolling ball 3 can be fixed at two sides in the direction of the loop bar 6 and can roll freely in the direction vertical to the loop bar 6.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any obvious modifications, substitutions or variations can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (5)

1. A centrifugal pump sealing opening ring with double-row adjustable rolling balls is used for being assembled between a volute (4) and an impeller (5) of a centrifugal pump and is characterized by mainly comprising a circular ring (1), rolling balls (3) and a loop bar (6),
a plurality of hemispheric grooves (7) are formed in the inner side wall of the circular ring (1) along the circumferential direction, and two rows of grooves (7) are distributed in parallel in the radial direction;
the rolling ball (3) is provided with a first through hole (8) penetrating through the center of the ball, the rolling ball (3) is positioned in the groove (7) and is limited in the groove (7) by a loop bar (6) penetrating through the first through hole (8);
the radius R of the inner wall of the ring (1) is 0.55 to 0.6 time of the radius of the inlet of the impeller (5), the radial thickness e of the ring (1) is 0.06 to 0.12 time of the radius R of the inner wall, and the width b of the ring (1) in the axial direction is 0.30 to 0.40 time of the radius R of the inner wall of the ring (1); the radius r of the rolling ball (3) is 0.15 to 0.2 time of the width b of the circular ring (1) in the axial direction;
the ring (1) is provided with a second through hole (9) which penetrates through the groove (7) and is axially parallel to the ring (1), the loop bar (6) penetrates through the second through hole (9), and two ends of the loop bar are fixed by fixing nuts (2);
the radius r of the loop bar (6) and the middle section corresponding to the second through hole (9) between the two grooves (7) 2 Greater than the radius r of its two side portions 1 The radial clearance between the middle section of the loop bar (6) and the second through hole (9) between the two grooves (7) is 0.1-0.3 mm, and the radial clearance between the parts at the two sides of the middle section of the loop bar (6) and the first through hole (8) and the second through hole (9) is 0.5-0.8 mm;
the upper and lower top ends of the loop bar (6) are provided with loop bar external threads (11) which are matched with the fixed nut internal threads (12), and the tightening direction of the joint of the external threads (11) and the internal threads (12) is the same as the moving direction of the impeller (5) relative to the rolling ball (3), so that the loop bar is ensured to be in a fastening state.
2. Centrifugal pump seal ring according to claim 1, characterized in that the grooves (7) are arranged in two rows side by side, the number of hemispherical grooves (7) on the inner side wall of the ring (1) being 16-20; the ball (3) is made of 20 steel.
3. The centrifugal pump seal mouth ring according to claim 1, characterized in that a radial clearance of 0.6-1.1 mm is provided between the outermost side of the rolling ball (3) and the outer side wall of the front cover plate of the impeller (5).
4. The centrifugal pump seal mouth ring according to claim 1, characterized in that the second through hole is positioned in the ring (1) and has a radial width of 0.8-1.2 mm with the inner wall of the ring (1), and the radius of the first through hole (8) and the second through hole (9) is 0.30-0.50 times of the radius r of the rolling ball (3).
5. A centrifugal pump seal mouth ring according to claim 1, characterized in that there is a radial gap of 0.4-0.8 mm between the inner wall of the groove (7) and the outer wall of the ball (3).
CN202110460234.4A 2021-04-27 2021-04-27 Centrifugal pump seal mouth ring with double adjustable spin Active CN113107894B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110460234.4A CN113107894B (en) 2021-04-27 2021-04-27 Centrifugal pump seal mouth ring with double adjustable spin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110460234.4A CN113107894B (en) 2021-04-27 2021-04-27 Centrifugal pump seal mouth ring with double adjustable spin

Publications (2)

Publication Number Publication Date
CN113107894A CN113107894A (en) 2021-07-13
CN113107894B true CN113107894B (en) 2022-10-18

Family

ID=76721143

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110460234.4A Active CN113107894B (en) 2021-04-27 2021-04-27 Centrifugal pump seal mouth ring with double adjustable spin

Country Status (1)

Country Link
CN (1) CN113107894B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118089384B (en) * 2024-04-23 2024-07-30 铜川中秦科技发展有限公司 Kiln head sealing structure of rotary kiln

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203476784U (en) * 2013-05-24 2014-03-12 高涵文 Sealing ring with improved structure
WO2015035625A1 (en) * 2013-09-15 2015-03-19 Gao Hanwen Sealing ring maintaining gap
CN205331042U (en) * 2016-01-23 2016-06-22 江苏华飞宇节能技术有限公司 Centrifugal pump
DE102016207775A1 (en) * 2016-05-04 2017-11-09 Ksb Aktiengesellschaft Centrifugal pump with an arrangement for sealing

Also Published As

Publication number Publication date
CN113107894A (en) 2021-07-13

Similar Documents

Publication Publication Date Title
CN113107894B (en) Centrifugal pump seal mouth ring with double adjustable spin
CN109236644B (en) Star wheel assembly and single-screw air compressor comprising same
CN108105386B (en) Filter capable of stably operating for long time and hybrid shaft sealing assembly thereof
GB1575730A (en) Flexible seal and seal assembly
CN204003486U (en) A kind of TC Novel series slag stock pump
CN110486473B (en) Novel rotary shaft lip-shaped sealing ring
CN201031764Y (en) Hydroturbine chief axis non-contact type metallic sealing structure
CN112253535A (en) High-temperature screw asphalt pump mechanical sealing element
CN115126877A (en) Low-leakage long-life floating ring sealing device
CN103307020A (en) Two-way floating type mouth-ring sealing device of centrifugal pump
CN204504916U (en) A kind of peripheral milling being convenient to assemble and safeguard
CN217539349U (en) Anti-deformation tapered roller bearing
CN113446228A (en) Corrosion-resistant wear-resistant centrifugal pump
CN114483959B (en) Sealing device for rolling mill roller shaft oil film bearing
CN111322269A (en) Mechanical seal mouth ring for lubricating grease of centrifugal pump
CN104074770A (en) Novel TC series slurry pump
CN111765127A (en) Wear-resisting corrosion-resistant chemical pump inlet structure
CN100487295C (en) High pressure swivel joint
JP3306023B2 (en) Roll neck sealing device
CN213392885U (en) Water supply pump balancing device
CN220770310U (en) Novel oilless bushing mounting structure
RU2797085C1 (en) Oil seal for water pump
CN218617162U (en) Variable-pitch propeller blade and propeller shell connecting structure
CN213144855U (en) Double-end-face integrated mechanical seal of centrifugal pump
CN209959883U (en) Finishing machine auxiliary roller seal structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20230406

Address after: 118000 No. 815, maojuan Road, Zhen'an District, Dandong City, Liaoning Province

Patentee after: Dandong Shunsheng mechanical equipment Co.,Ltd.

Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301

Patentee before: JIANGSU University

TR01 Transfer of patent right