CN212454847U

CN212454847U - Leak-proof mechanical sealing device of water pump

Info

Publication number: CN212454847U
Application number: CN202020834202.7U
Authority: CN
Inventors: 陶海锋; 蒋兵; 闻益; 徐亮; 孙伟
Original assignee: Jiangsu Keman Machinery Manufacturing Co ltd
Current assignee: Jiangsu Keman Machinery Manufacturing Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-02-02
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to a water pump correlation technique field, specifically a leak protection mechanical seal device of water pump, including base and the pump body of setting on the base, the base is a rectangle pedestal, pump body fixed mounting is near the right side of base, and the near left end of base is provided with the motor mount pad, and through clamp structure fixed mounting motor on the motor mount pad, the pump body is short cylinder structure, and it is the cavity, and it sets up with the motor is the same axle center, the near outside face of the pump body is provided with the inlet, and the upper end of its pump body is provided with the leakage fluid dram, the left side of the pump body is provided with the mechanical seal installation cavity; through setting up second grade rotating ring and one-level rotating ring collocation use between mechanical seal's inner circle and pivot to set the cross-section of one-level rotating ring and second grade rotating ring into right trapezoid, and will and hypotenuse meshing setting between them, thereby through the mutual card between them with the extrusion force of time formation inclined direction, thereby let it have the trend of looks both sides deformation, thereby improve the sealed effect of its junction.

Description

Leak-proof mechanical sealing device of water pump

Technical Field

The utility model relates to a relevant technical field of water pump specifically is a leak protection mechanical seal device of water pump.

Background

The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the transmission shaft penetrates inside and outside the equipment, a circumferential gap exists between the shaft and the equipment, the medium in the equipment leaks outwards through the gap, if the pressure in the equipment is lower than the atmospheric pressure, air leaks into the equipment, and therefore a shaft seal device for preventing the leakage is needed; but its rotating ring of traditional mechanical seal and quiet ring all are the loop configuration that is rectangle or square for the cross-section, and the setting of front and back flush formula lets it after the wearing and tearing phenomenon appears, the inefficacy phenomenon appears very easily to lead to the whole leakproofness of water pump to descend, for this, the utility model provides a leak protection mechanical seal device of water pump is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a leak protection mechanical seal device of water pump to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a leak-proof mechanical sealing device of a water pump comprises a base and a pump body arranged on the base, wherein the base is a rectangular base body, the pump body is fixedly arranged on the right side of the base, a motor mounting seat is arranged at the left end of the base, a motor is fixedly arranged on the motor mounting seat through a clamp structure, the pump body is of a short cylindrical structure and is a hollow cavity, the pump body and the motor are coaxially arranged, a liquid inlet is arranged on the outer side surface of the pump body, a liquid outlet is arranged at the upper end of the pump body, a mechanical sealing mounting cavity is arranged on the left side of the pump body, a rotating shaft mounting cavity is arranged on the left side of the mechanical sealing mounting cavity, the three mechanical sealing mounting cavities are communicated, a mechanical seal is arranged in the mechanical sealing mounting cavity, a rotating shaft is arranged in the inner ring of the mechanical seal, and an impeller is fixedly arranged at the position, located, and the rear end of the rotating shaft is connected with a rotor of the motor through a coupler.

Preferably, the equal fixed welding in both sides of side has the mounting panel around the base, the mounting panel is trapezoidal plate body for the surface, and has seted up the mounting hole on its plate body.

Preferably, carry out fixed connection through the connecting rod between mechanical seal installation cavity and the pivot installation cavity, the both ends of connecting rod all are provided with the one-level ring flange, and the one-level ring flange at its both ends passes through bolt fixed connection with the left surface of mechanical seal installation cavity, the lateral wall of pivot installation cavity respectively, and the back lateral wall of pivot installation cavity is provided with the second grade ring flange, and its back lateral wall fixed connection through screw and mechanical seal installation cavity.

Preferably, a first-stage movable ring and a second-stage movable ring are arranged between the inner surface of the mechanical seal and the gap of the surface of the rotating shaft, the sections of the first-stage movable ring and the second-stage movable ring are in a right-angle trapezoid shape, and the bevel edges of the first-stage movable ring and the second-stage movable ring are arranged in a meshed mode.

Preferably, the front end of the cavity lateral section of the mechanical seal installation cavity is rectangular, the rear end of the cavity lateral section of the mechanical seal installation cavity is isosceles trapezoid, a first-stage static ring and a second-stage static ring are arranged between the inner wall of the cavity and the outer side face of the mechanical seal installation cavity, the cross section of the first-stage static ring is rectangular, and the cross section of the second-stage static ring is right trapezoid.

Preferably, the front end of one-level quiet ring and one-level rotating ring carries out the position through spacing lug and prescribes a limit to, and the rear surface of the quiet ring of second grade and second grade rotating ring is outstanding in mechanical seal's trailing flank, and its laminating of rear is provided with the fly leaf, the fly leaf is an annular plate, and its plate body activity sets up among the cavity of pivot installation cavity, and the inner circle of its annular plate is greater than the diameter of pivot, and the rear end of pivot installation cavity is provided with the limiting plate, the through-hole has been seted up in the middle of the plate body of limiting plate, and its aperture is greater than the diameter of pivot, and the pivot passes its hole body, and the edge of its plate body and the lateral wall fixed connection of pivot installation cavity, and be provided with supporting spring in its cavity, and supporting spring does not contact with the pivot, and its.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the two-stage movable ring and the one-stage movable ring are arranged between the inner ring of the mechanical seal and the rotating shaft in a matched mode, the sections of the one-stage movable ring and the two-stage movable ring are arranged into a right-angled trapezoid, and the oblique sides of the two are meshed, so that the two parts have the tendency of deformation of the two sides through oblique extrusion force formed when the two parts are mutually clamped, and the sealing effect of the connecting part is improved;

2. and the rear end cavity through with the mechanical seal installation cavity sets to the form that is the certain slope to through setting up the second grade quiet ring that the cross-section is right trapezoid, and through set up the fly leaf at its rear, and provide the holding power for the fly leaf through supporting spring at the rear, thereby guarantee that rotating ring and quiet ring are at ageing in-process, when elasticity reduces, it still can play fine sealed effect to its junction, thereby improve its life, reduce its maintenance cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a pump body structure in a half-section view;

fig. 3 is an enlarged schematic view of a structure in fig. 2.

In the figure: the device comprises a base 1, a pump body 2, a mounting plate 3, a liquid inlet 4, a liquid outlet 5, a mechanical seal mounting cavity 6, a rotating shaft mounting cavity 7, a motor 8, a connecting rod 9, a rotating shaft 10, a mechanical seal 11, a first-stage movable ring 12, a second-stage movable ring 13, a first-stage stationary ring 14, a second-stage stationary ring 15, a movable plate 16, a supporting spring 17, a limiting plate 18 and an impeller 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a leak-proof mechanical sealing device of a water pump comprises a base 1 and a pump body 2 arranged on the base 1, wherein the base 1 is a rectangular base body, the pump body 2 is fixedly arranged on the right side of the base 1, a motor mounting seat is arranged on the left end of the base 1, a motor 8 is fixedly arranged on the motor mounting seat through a hoop structure, the pump body 2 is of a short cylindrical structure and is a hollow cavity, the pump body and the motor 8 are coaxially arranged, a liquid inlet 4 is arranged on the outer side surface of the pump body 2, a liquid outlet 5 is arranged at the upper end of the pump body 2, a mechanical sealing mounting cavity 6 is arranged on the left side of the pump body 2, a rotating shaft mounting cavity 7 is arranged on the left side of the mechanical sealing mounting cavity 6, the three parts are communicated, a mechanical seal 11 is arranged in the mechanical sealing mounting cavity 6, a rotating shaft 10 is arranged in the inner ring of the mechanical seal 11, and an impeller 19 is fixedly arranged at the position, and the rear end of the rotating shaft 10 is connected with the rotor of the motor 8 through a coupling.

Furthermore, mounting plates 3 are fixedly welded on two sides of the front side and the rear side of the base 1, the mounting plates 3 are plate bodies with trapezoidal surfaces, and mounting holes are formed in the plate bodies;

further, the mechanical seal installation cavity 6 is fixedly connected with the rotating shaft installation cavity 7 through a connecting rod 9, primary flange plates are arranged at two ends of the connecting rod 9, the primary flange plates at the two ends are respectively and fixedly connected with the left side surface of the mechanical seal installation cavity 6 and the side wall of the rotating shaft installation cavity 7 through bolts, a secondary flange plate is arranged on the rear side wall of the rotating shaft installation cavity 7, and the secondary flange plate is fixedly connected with the rear side wall of the mechanical seal installation cavity 6 through screws;

furthermore, a primary movable ring 12 and a secondary movable ring 13 are arranged between the gap between the inner surface of the mechanical seal 11 and the surface of the rotating shaft 10, the sections of the primary movable ring 12 and the secondary movable ring 13 are in a right trapezoid shape, the inclined sides of the primary movable ring 12 and the secondary movable ring 13 are arranged in a meshed manner, the secondary movable ring 13 and the primary movable ring 12 are arranged between the inner ring of the mechanical seal 11 and the rotating shaft 10 in a matched manner, the sections of the primary movable ring 12 and the secondary movable ring 13 are arranged in a right trapezoid shape, and the inclined sides of the primary movable ring 12 and the secondary movable ring 13 are arranged in a meshed manner, so that the primary movable ring and the secondary movable ring have the tendency of deformation at two sides by mutual clamping and forming an extrusion force in an inclined;

further, the front end of the lateral section of the cavity of the mechanical seal installation cavity 6 is rectangular, the rear end of the lateral section of the cavity is isosceles trapezoid, a primary stationary ring 14 and a secondary stationary ring 15 are arranged between the inner wall of the cavity and the outer side surface of the mechanical seal 11, the section of the primary stationary ring 14 is rectangular, and the section of the secondary stationary ring 15 is right trapezoid;

furthermore, the front ends of the first-stage stationary ring 14 and the first-stage movable ring 12 are position-limited by a limit bump, the rear surfaces of the second-stage stationary ring 15 and the second-stage movable ring 13 protrude out of the rear side of the mechanical seal 11, and a movable plate 16 is attached to the rear side of the mechanical seal 11, the movable plate 16 is an annular plate, the plate body is movably disposed in the cavity of the rotating shaft installation cavity 7, the inner ring of the annular plate is larger than the diameter of the rotating shaft 10, a limit plate 18 is disposed at the rear end of the rotating shaft installation cavity 7, a through hole is disposed in the middle of the plate body of the limit plate 18, the diameter of the through hole is larger than the diameter of the rotating shaft 10, the rotating shaft 10 passes through the hole body, the edge of the plate body is fixedly connected with the side wall of the rotating shaft installation cavity 7, a support spring 17 is disposed in the cavity, the support spring 17 is not in contact with the rotating shaft, and the rear end of the limit plate 18, in addition, by arranging the secondary static ring 15 with the right trapezoid cross section, arranging the movable plate 16 at the rear part of the secondary static ring, and providing supporting force for the movable plate 16 through the supporting spring 17 at the rear part, the movable ring and the static ring can still have good sealing effect on the joint when the elasticity is reduced in the aging process, so that the service life of the movable ring and the static ring is prolonged, and the maintenance cost of the movable ring and the static ring is reduced;

the working principle is as follows: in practical use, when the moving ring and the stationary ring at the position of the mechanical seal 11 of the device are used for a long time, the moving ring and the stationary ring are aged to cause the elasticity of the moving ring to be reduced and the sealing effect of the joint to be reduced, the moving ring and the stationary ring can continuously apply pressure to the moving plate 16 under the action of the supporting spring 17 on the rear end limiting plate 18, so that an inward force is applied to the secondary moving ring 13 and the secondary stationary ring 15 through the moving plate, an extrusion force is formed between the primary moving ring and the secondary moving ring, the primary moving ring and the secondary moving ring have a tendency of deforming towards two sides, the sealing effect of the joint is ensured, and the secondary stationary ring 15 can also form a sufficient extrusion force with the side of the cavity under the action of the extrusion force, so that the sealing effect of the position is ensured.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a leak protection mechanical seal device of water pump, includes base (1) and sets up pump body (2) on base (1), its characterized in that: the base (1) is a rectangular base body, the pump body (2) is fixedly arranged on the right side of the base (1), a motor mounting seat is arranged at the left end of the base (1), a motor (8) is fixedly arranged on the motor mounting seat through a hoop structure, the pump body (2) is of a short cylindrical structure and is a hollow cavity, the pump body and the motor (8) are coaxially arranged, a liquid inlet (4) is arranged on the outer side face of the pump body (2), a liquid outlet (5) is arranged at the upper end of the pump body (2), a mechanical seal mounting cavity (6) is arranged on the left side of the pump body (2), a rotating shaft mounting cavity (7) is arranged on the left side of the mechanical seal mounting cavity (6), mechanical seals (11) are arranged in the mechanical seal mounting cavity (6), and a rotating shaft (10) is arranged in the inner ring of the mechanical seal (11), and the rotating shaft (10) is fixedly provided with an impeller (19) at the cavity position of the pump body (2), and the rear end of the rotating shaft (10) is connected with the rotor of the motor (8) through a coupler.

2. A leak-proof mechanical seal device for a water pump according to claim 1, wherein: the base is characterized in that mounting plates (3) are fixedly welded on the two sides of the front side and the rear side of the base (1), the surfaces of the mounting plates (3) are trapezoidal plate bodies, and mounting holes are formed in the plate bodies.

3. A leak-proof mechanical seal device for a water pump according to claim 1, wherein: carry out fixed connection through connecting rod (9) between mechanical seal installation cavity (6) and pivot installation cavity (7), the both ends of connecting rod (9) all are provided with the one-level ring flange, and the one-level ring flange at its both ends passes through bolt fixed connection with the left surface of mechanical seal installation cavity (6), the lateral wall of pivot installation cavity (7) respectively, and the back lateral wall of pivot installation cavity (7) is provided with the second grade ring flange, and its back lateral wall fixed connection through screw and mechanical seal installation cavity (6).

4. A leak-proof mechanical seal device for a water pump according to claim 1, wherein: be provided with one-level rotating ring (12) and second grade rotating ring (13) between mechanical seal (11) internal surface and pivot (10) surface gap, the cross-section of one-level rotating ring (12) and second grade rotating ring (13) is right trapezoid, and the hypotenuse between them sets up for meshing mutually.

5. A leak-proof mechanical seal device for a water pump according to claim 1, wherein: the front end of the cavity lateral section of the mechanical seal installation cavity (6) is rectangular, the rear end of the cavity lateral section of the mechanical seal installation cavity is isosceles trapezoid, a first-stage static ring (14) and a second-stage static ring (15) are arranged between the inner wall of the cavity and the outer side surface of the mechanical seal (11), the section of the first-stage static ring (14) is rectangular, and the section of the second-stage static ring (15) is right trapezoid.

6. A leak-proof mechanical seal device for a water pump according to claim 5, wherein: the front ends of the first-level static ring (14) and the first-level moving ring (12) are limited in position through a limiting lug, the rear surfaces of the second-level static ring (15) and the second-level moving ring (13) protrude out of the rear side surface of the mechanical seal (11), a movable plate (16) is attached to the rear side of the mechanical seal, the movable plate (16) is an annular plate, the plate body of the movable plate is movably arranged in the cavity of the rotating shaft installation cavity (7), the inner ring of the annular plate is larger than the diameter of the rotating shaft (10), a limiting plate (18) is arranged at the rear end of the rotating shaft installation cavity (7), a through hole is formed in the middle of the plate body of the limiting plate (18), the aperture of the through hole is larger than the diameter of the rotating shaft (10), the rotating shaft (10) penetrates through the hole body of the rotating shaft, the edge of the plate body of the rotating shaft is fixedly connected with the side wall of the rotating shaft installation cavity (7), and the rear end of the connecting rod is fixedly connected with a limiting plate (18).