CN215292995U

CN215292995U - Mechanical sealing device for frequently starting double-suction pump

Info

Publication number: CN215292995U
Application number: CN202121548305.8U
Authority: CN
Inventors: 谭国利; 卢淑艳; 马耀军
Original assignee: Lvliang Jianlong Industrial Co Ltd
Current assignee: Lvliang Jianlong Industrial Co Ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-12-24
Anticipated expiration: 2031-07-08

Abstract

The utility model belongs to the technical field of the mechanical seal device technique and specifically relates to a mechanical seal device for frequently starting double entry pump, including rotation axis, pump cover, a plurality of bolts of one side fixedly connected with of pump cover, the detachable sealed lid that is connected with in surface of bolt, the equal threaded connection in surface of bolt has the nut, the through-hole has been seted up to one side of sealed lid, the surface of rotation axis is rotated and is connected with the axle sleeve, the both sides of axle sleeve all are equipped with axle sleeve auxiliary seal circle, the surface of axle sleeve is rotated and is connected with the rotating ring, quiet ring has been cup jointed in the surface activity of axle sleeve, quiet ring auxiliary seal circle has been cup jointed in the surface activity of quiet ring, the spacing ring has been cup jointed in the surface activity of axle sleeve, the rotating ring seat has been cup jointed in the surface activity of axle sleeve, a plurality of spring grooves have been seted up to one side of rotating ring seat. The utility model discloses on ordinary mechanical seal device's basis, have oxygen lance pump mechanical seal leak protection water function and solved the shortcoming that oxygen lance pump mechanical seal leaked.

Description

Mechanical sealing device for frequently starting double-suction pump

Technical Field

The utility model relates to a mechanical seal technical field especially relates to a mechanical seal device for frequently starting double entry pump.

Background

The mechanical seal is a device for preventing fluid leakage, which is composed of at least one pair of devices which are perpendicular to the end surface of a rotating axis, keep fit and slide relatively under the action of fluid pressure and the elasticity of a compensating mechanism and the cooperation of auxiliary seal. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage.

The double-suction pump is mainly used for cooling steel-making equipment and providing stable circulating water for the equipment. The oxygen lance pump is used for providing stable circulating water for the oxygen lance for cooling the oxygen lance, the oxygen lance pump needs to be started and stopped frequently due to process requirements in the using process, most of mechanical seals of the original oxygen lance pump are of a separated mechanical seal structure, and mechanical seal water leakage can be found after the oxygen lance pump is used for a period of time, and the oxygen lance pump is forced to rotate and overhaul, so that the production of a converter is seriously influenced.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a mechanical seal device for frequently starting double entry pump has oxygen rifle pump mechanical seal leak protection water function and has solved the shortcoming that oxygen rifle pump mechanical seal leaked.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a mechanical sealing device for frequently starting a double-suction pump is designed, and comprises a rotating shaft and a pump cover, wherein one side of the pump cover is fixedly connected with a plurality of bolts, the surfaces of the bolts are detachably connected with sealing covers, the surfaces of the bolts are all in threaded connection with nuts, one side of each sealing cover is provided with a through hole, the surface of the rotating shaft is rotatably connected with a shaft sleeve, two sides of the shaft sleeve are respectively provided with a shaft sleeve auxiliary sealing ring, the surface of the shaft sleeve is rotatably connected with a movable ring, the surface of the shaft sleeve is movably sleeved with a stationary ring, the surface of the stationary ring is movably sleeved with a stationary ring auxiliary sealing ring, the surface of the stationary ring is movably sleeved with a limiting ring, the surface of the shaft sleeve is movably sleeved with a movable ring seat, one side of the movable ring seat is provided with a plurality of spring grooves, the inner walls of the spring grooves are respectively provided with a movable ring compensation spring, and the surface of the shaft sleeve is movably sleeved with a first sealing ring, the surface activity of rotating ring seat has cup jointed the gland water seal arrangement, one side fixedly connected with second sealing washer of gland water seal arrangement, the surface activity of gland water seal arrangement has cup jointed the third sealing washer, threaded connection hole has been seted up on the surface of gland water seal arrangement, threaded connection hole's inner wall threaded connection has the raceway, the surface activity of axle sleeve has cup jointed spacing snap ring, a plurality of draw-in grooves have been seted up on the surface of axle sleeve, the inner wall threaded connection of spacing snap ring has holding bolt.

Preferably, the surface of the bolt is movably sleeved with a gasket, and the gasket is positioned between the sealing cover and one side of the nut opposite to the sealing cover.

Preferably, the sealing cover is movably connected with the gland water seal device in a clamping manner, and the surface of the water delivery pipe is movably inserted into the inner wall of the through hole.

Preferably, the shaft sleeve is limited through a fastening bolt, and the surface of the gland water sealing device is attached to the inner wall of the sealing cover.

Preferably, the first sealing ring, the second sealing ring and the third sealing ring are made of rubber materials, and the pipeline part of the water delivery pipe is made of a metal corrugated hose.

Compared with the prior art, the beneficial effects of the utility model reside in that: by replacing the oxygen lance pump separation type mechanical seal with the integrated mechanical seal,

the reason is revealed easily to disconnect-type mechanical seal when equipment frequently starts:

1. when the equipment is started, the pressure on the back of the moving ring is increased, and the friction heat is intensified

2. The liquid film is damaged under the combined action of the medium pressure and the spring force to form short-time dry friction

3. While the shaft is rotating, no liquid film is formed, and the friction surface is worn

4. The L-shaped sealing surface cannot unload the pressure change and impact the sealing surface

5. Design of unbalance

The integrated mechanical seal has the following advantages

1. Hydraulic balance design, can bear pressure change

2. Unique sealed geometric design with unloading function

3. Avoid the damage of liquid film caused by over-pressure to form dry friction and abrasion friction surface

4. Static ring compensation, suitable for frequent start and stop of pump

The original separated mechanical seal has higher requirement on an installer, the debugging of the installation position and the spring specific pressure is completely dependent on experience, if the installation and debugging are not in place, the leakage can be caused if the spring debugging pressure is too small, the mechanical seal has short service life or is directly scrapped if the spring debugging pressure is too large, the mechanical seal has frequent replacement in forty-five days of the service life of the original separated mechanical seal, the equipment is frequently disassembled and assembled, the equipment precision is reduced, meanwhile, the damage of other parts is also caused, circulating water is leaked, and the comprehensive cost is greatly increased. The integrated mechanical seal has the advantages of being convenient to install, reasonable in structure, long in service cycle, low in technical requirement on installation of an installer, free of adjusting specific pressure and position of a spring, capable of achieving the separation type mechanical seal in the prior art, capable of being upgraded into an integrated type, capable of tightening a plurality of screws, capable of improving maintenance efficiency and reducing comprehensive cost. The integrated mechanical seal has long service life, can be used for 8 months on line after replacement, does not have the condition of mechanical seal water leakage, and completely meets the working condition of frequent starting of the oxygen lance pump.

The parts of the device not involved are the same as or can be implemented using prior art.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a front sectional view of a mechanical seal device for frequently starting a double suction pump according to the present invention;

fig. 2 is a structural front view of a mechanical sealing device for frequently starting a double suction pump according to the present invention;

fig. 3 is a side sectional view of a mechanical sealing device for frequently starting a double suction pump according to the present invention.

In the figure: the sealing device comprises a rotating shaft 1, a pump cover 2, a bolt 3, a sealing cover 4, a nut 5, a through hole 6, a shaft sleeve 7, an auxiliary sealing ring 8, a movable ring 9, a stationary ring 10, an auxiliary sealing ring 11, a limiting ring 12, a movable ring seat 13, a spring groove 14, a movable ring compensating spring 15, a first sealing ring 16, a gland water sealing device 17, a second sealing ring 18, a third sealing ring 19, a threaded connecting hole 20, a water delivery pipe 21, a limiting snap ring 22, a clamping groove 23, a fastening bolt 24 and a gasket 25.

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, a mechanical sealing device for frequently starting a double suction pump comprises a rotating shaft 1 and a pump cover 2, wherein one side of the pump cover 2 is fixedly connected with a plurality of bolts 3, the surface of each bolt 3 is detachably connected with a sealing cover 4, the surface of each bolt 3 is in threaded connection with a nut 5, one side of each sealing cover 4 is provided with a through hole 6, the surface of the rotating shaft 1 is rotatably connected with a shaft sleeve 7, two sides of each shaft sleeve 7 are respectively provided with a shaft sleeve auxiliary sealing ring 8, the surface of each shaft sleeve 7 is rotatably connected with a movable ring 9, the surface of each shaft sleeve 7 is movably sleeved with a stationary ring 10, the surface of each stationary ring 10 is movably sleeved with a stationary ring auxiliary sealing ring 11, the surface of each stationary ring 10 is movably sleeved with a limiting ring 12, the surface of each shaft sleeve 7 is movably sleeved with a movable ring seat 13, one side of each movable ring seat 13 is provided with a plurality of spring grooves 14, the inner walls of the spring grooves 14 are respectively provided with a movable ring compensation spring 15, the surface of each shaft sleeve 7 is movably sleeved with a first sealing ring 16, the gland water seal device 17 has been cup jointed in the surface activity of rotating ring seat 13, one side fixedly connected with second sealing washer 18 of gland water seal device 17, third sealing washer 19 has been cup jointed in the surface activity of gland water seal device 17, threaded connection hole 20 has been seted up on the surface of gland water seal device 17, the inner wall threaded connection of threaded connection hole 20 has raceway 21, spacing snap ring 22 has been cup jointed in the surface activity of axle sleeve 7, a plurality of draw-in grooves 23 have been seted up on the surface of axle sleeve 7, the inner wall threaded connection of spacing snap ring 22 has tightly decided bolt 24.

Specifically, the surface of the bolt 3 is movably sleeved with a gasket 25, and the gasket 25 is located between the sealing cover 4 and one side of the nut 5 opposite to each other. Through setting up gasket 25, the nut 5 of being convenient for installs more tightly, is difficult for causing not hard up.

Specifically, sealed lid 4 is connected for activity joint formula with gland water seal 17, and the joint formula is convenient for install fast, and it is more convenient that the installation gets up, and the surface of raceway 21 is pegged graft with the inner wall activity of through-hole 6, and the raceway 21 of being convenient for carries out tensile compression at the inner wall of through-hole 6.

Specifically, the shaft sleeve 7 is limited through the fastening bolt 24, the inner wall of the gland water sealing device 17, which is attached to the inner wall of the sealing cover 4, is convenient for the gland water sealing device 17 to have more excellent sealing performance at the joint with the sealing cover 4, and the connection is more convenient.

Specifically, the first sealing ring 16, the second sealing ring 18 and the third sealing ring 19 are made of rubber, the rubber is made of a high-elasticity polymer material with reversible deformation, the high-elasticity polymer material is rich in elasticity at room temperature, can generate large deformation under the action of small external force, can recover to the original shape after the external force is removed, and can better seal the contact surface of the two parts, the pipeline part of the water conveying pipe 21 is made of a metal corrugated hose, the corrosion resistance of metal is more excellent, the corrugated hose is installed in a liquid conveying system as a flexible pressure-resistant pipe fitting to compensate the mutual displacement of the connecting ends of the pipeline or a machine and equipment, absorb vibration energy, play roles in vibration reduction, noise reduction and the like, and the flexible sealing ring has the characteristics of good flexibility, light weight, corrosion resistance, fatigue resistance, high temperature and low temperature resistance and the like. Can also be used by threading.

The utility model discloses an application principle and use flow: the sealing performance between the shaft sleeve 7 and the movable ring 9 is improved conveniently by arranging the two shaft sleeve auxiliary sealing rings 8, the static ring 10, the static ring auxiliary sealing ring 11 and the limiting ring 12 are arranged to compensate the static ring 10 conveniently and are suitable for frequently starting and stopping the pump, the sealing performance between each part is improved conveniently by arranging the first sealing ring 16, the second sealing ring 18 and the third sealing ring 19, the leakage condition is not easy to occur, the excessive pressure is avoided conveniently by arranging the movable ring seat 13, the spring groove 14 and the movable ring compensation spring 15 to cause the damage of a liquid film, the dry friction is formed, the friction surface is abraded, the water pipe 21 is convenient to install by arranging the threaded connecting hole 20, the water flow is not easy to leak by arranging the threaded connecting hole 20, the limiting snap ring 22, the clamping groove 23 and the fastening bolt 24 are arranged to facilitate the installation and the limiting of the shaft sleeve 7, through the arrangement of the bolt 3, the sealing cover 4, the nut 5 and the gasket 25, the special sealing geometric design has a quick unloading function.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical sealing device for frequently starting a double suction pump comprises a rotating shaft (1) and a pump cover (2), and is characterized in that one side of the pump cover (2) is fixedly connected with a plurality of bolts (3), the surface of each bolt (3) is detachably connected with a sealing cover (4), the surface of each bolt (3) is in threaded connection with a nut (5), one side of each sealing cover (4) is provided with a through hole (6), the surface of the rotating shaft (1) is rotatably connected with a shaft sleeve (7), two sides of each shaft sleeve (7) are respectively provided with a shaft sleeve auxiliary sealing ring (8), the surface of each shaft sleeve (7) is rotatably connected with a movable ring (9), the surface of each shaft sleeve (7) is movably sleeved with a stationary ring (10), the surface of each stationary ring (10) is movably sleeved with a stationary ring auxiliary sealing ring (11), and the surface of each stationary ring (10) is movably sleeved with a limiting ring (12), a movable ring seat (13) is sleeved on the surface of the shaft sleeve (7) in a movable manner, a plurality of spring grooves (14) are formed in one side of the movable ring seat (13), movable ring compensation springs (15) are arranged on the inner walls of the spring grooves (14), a first sealing ring (16) is sleeved on the surface of the shaft sleeve (7) in a movable manner, a gland water sealing device (17) is sleeved on the surface of the movable ring seat (13) in a movable manner, a second sealing ring (18) is fixedly connected to one side of the gland water sealing device (17), a third sealing ring (19) is sleeved on the surface of the gland water sealing device (17), a threaded connecting hole (20) is formed in the surface of the gland water sealing device (17), a water conveying pipe (21) is connected to the inner wall of the threaded connecting hole (20) in a threaded manner, a limiting snap ring (22) is sleeved on the surface of the shaft sleeve (7) in a movable manner, a plurality of clamping grooves (23) are formed in the surface of the shaft sleeve (7), the inner wall of the limiting snap ring (22) is in threaded connection with a fastening bolt (24).

2. A mechanical seal device for frequently starting double suction pumps according to claim 1, characterized in that the surface of the bolt (3) is movably sleeved with a gasket (25), and the gasket (25) is positioned between the seal cover (4) and the opposite side of the nut (5).

3. The mechanical sealing device for frequently starting the double suction pump according to claim 1, wherein the sealing cover (4) is movably connected with the gland water sealing device (17) in a clamping manner, and the surface of the water pipe (21) is movably inserted into the inner wall of the through hole (6).

4. The mechanical sealing device for frequently starting the double suction pump according to claim 1, characterized in that the shaft sleeve (7) is limited by a fastening bolt (24), and the surface of the gland water seal device (17) is designed to be attached to the inner wall of the sealing cover (4).

5. A mechanical sealing device for frequently starting double suction pumps according to claim 1, characterized in that the first sealing ring (16), the second sealing ring (18) and the third sealing ring (19) are made of rubber, and the pipe portion of the water pipe (21) is made of metal corrugated hose.