CN117167316A - Centrifugal pump mechanical seal structure - Google Patents
Centrifugal pump mechanical seal structure Download PDFInfo
- Publication number
- CN117167316A CN117167316A CN202311174125.1A CN202311174125A CN117167316A CN 117167316 A CN117167316 A CN 117167316A CN 202311174125 A CN202311174125 A CN 202311174125A CN 117167316 A CN117167316 A CN 117167316A
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- pump
- cover
- ring body
- shaft
- movable
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- 238000007789 sealing Methods 0.000 claims abstract description 26
- 239000000498 cooling water Substances 0.000 claims description 23
- 238000003860 storage Methods 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 16
- 230000001050 lubricating effect Effects 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 210000004907 gland Anatomy 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 44
- 230000000694 effects Effects 0.000 description 18
- 239000010687 lubricating oil Substances 0.000 description 12
- 238000005461 lubrication Methods 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump sealing structure, which comprises a pump body, a pump cover and a pump shaft, wherein the pump cover is arranged on the back surface of the pump body; compared with the existing centrifugal pump mechanical seal structure, the self-lubricating structure can improve the smoothness of the centrifugal pump and prolong the service lives of the movable ring body and the pump body.
Description
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump sealing structure.
Background
The centrifugal pump is operated by utilizing the rotation of the impeller to make water generate centrifugal motion, before the water pump is started, the pump shell and the water suction pipe are required to be filled with water, then the motor is started, the pump shaft drives the impeller and the water to do high-speed rotation motion, the water generates centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressing pipeline of the water pump through the runner of the volute pump shell, the mechanical end face seal of the centrifugal pump is a rotating shaft dynamic seal which is widely applied, namely the mechanical seal for short, and in recent decades, the mechanical seal technology is widely applied in industries such as petroleum, chemical industry, light industry, metallurgy, machinery, aviation, atomic energy and the like, according to statistics in modern petrochemical industry, 80-90% of the centrifugal pumps adopt mechanical seals, in the sealing device of rotating machinery, the mechanical seal accounts for more than 90% of the total sealing usage, and especially in recent years, the mechanical seal development is very important dynamic seal form in the fluid seal technology.
Be provided with mechanical seal between centrifugal pump's pump cover and the pump shaft, current mechanical seal includes quiet ring, the rotating ring, driving sleeve and spring, quiet ring is fixed in the quick-witted seal seat, the driving sleeve is fixed on the pump shaft, install a set of spring in the driving sleeve, this set of spring supports the rotating ring and leans on quiet ring, play sealed effect, and the rotating ring does not have self-lubricating structure when using, the rotating ring can rotate along with the pump shaft, because of having some friction between it and the end cover, lead to surface wear, not only can cause the damage of rotating ring, and the heat that the frictional rotation of rotating ring produced can influence the spring, the rotating ring can cause the deformation of spring after long-term use, thereby can produce the clearance between rotating ring and quiet ring, and then influence sealed effect, cause mechanical seal's damage and the leakage of the pump body easily, reduce the life of the pump body.
Therefore, it is important to design a centrifugal pump seal structure to solve the above-mentioned drawbacks.
Disclosure of Invention
Aiming at the defects of the prior art, the invention designs a centrifugal pump mechanical seal structure, which aims to solve the technical problems that in the prior art, a moving ring in a mechanical seal of the centrifugal pump has no self-lubricating structure, the moving ring can rotate along with a pump shaft, surface abrasion is caused by friction between the moving ring and an end cover to cause damage, and the deformation of a spring is caused by heat generated by friction of the moving ring, so that the elasticity of the spring is weakened, the sealing effect is influenced, the damage of the mechanical seal and the leakage of a pump body are easily caused, and the service life of the pump body is shortened.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a centrifugal pump mechanical seal structure, includes the pump body, pump cover and pump shaft, the pump cover is installed in the back of the pump body, the outside of pump shaft just is located and installs the spring holder between pump shaft and the pump cover, the first spring is installed in the front that the outside of pump shaft just is located the spring holder, the static ring seat is installed to the outside of pump shaft just is located the front end of first spring, the static ring body is installed to the outside of pump shaft just is located the front end of static ring seat, the outside of pump shaft just is located the front of static ring body and installs the moving ring body, install self-lubricating structure between moving ring body and the pump cover;
the self-lubricating structure comprises an oil storage cavity, a movable cavity, a second spring, a movable block, a lubricating hole, an oil guide channel, rollers and a roller path, wherein the oil storage cavity is formed in the front end of the inside of the pump cover, the movable cavity is symmetrically formed in the inside of the oil storage cavity, the second spring is fixedly mounted in the inside of the movable cavity, the movable block is fixedly connected to one end, close to the movable ring body, of the second spring, the lubricating hole is formed in one side, close to the movable ring body, of the movable cavity, the oil guide channel is formed in the left side and the right side of the inside of the lubricating hole, the rollers are mounted on the outer side of the movable ring body, and the roller path is formed in the position corresponding to the rollers on the inner side of the pump cover.
Through adopting above-mentioned technical scheme, when the pump body is used, at pump shaft pivoted in-process, first spring is supported all the time to spring holder and quiet ring seat at both ends, can make quiet ring body support all the time to the movable ring body to quiet ring seat, and then play sealed effect all the time when the pump shaft rotates, before the pump body uses, add lubricating oil in the oil storage chamber earlier, can drive the movable ring body and rotate when the pump shaft rotates, and can drive multiunit gyro wheel and roll in the inboard of raceway when the movable ring body rotates, and multiunit gyro wheel has the installation interval in the outside of movable ring body, so the gyro wheel can get into the junction of lubrication hole and raceway and movable block contact at intervals, because the movable block is connected with the inside of movable chamber through the second spring, and then can cause the not hard up of movable block when gyro wheel and movable block interval contact, and then let lubricating oil in the oil storage chamber get into the clearance of movable block and lubrication hole through the guide duct, and then slowly flow out and reach the purpose of lubrication gyro wheel and movable ring body, make the movable ring body self add the gyro wheel in the outside, make the rotation of movable ring body more smooth and reduce the body with the friction force between the pump cover greatly, thereby the service life of the pump body can not be influenced by the life of the pump body, the life is improved, and the life of pump body can be damaged because of the life is not increased.
As a preferable scheme of the invention, the bottom of the pump body is provided with the mounting seat, the tail end of the mounting seat is provided with the motor, the output shaft of the motor is connected with the pump shaft through the coupler, the support is arranged on the outer side of the pump shaft and positioned on the back of the pump cover, and the pump body, the motor and the support are fixedly connected with the mounting seat through bolts.
Through adopting above-mentioned technical scheme, the pump body, motor and support equal fixed mounting are on the mount pad, but while mount pad fixed mounting is on other equipment, at pump body during operation, the starter motor is under the connection of shaft coupling for the output shaft of motor drives the pump shaft and rotates, at pump shaft pivoted in-process, first spring is supported all the time to quiet ring seat, thereby supports still the quiet ring body all the time to the moving ring body, and then play sealed effect all the time when the pump shaft rotates.
As the preferable scheme of the invention, the top of the mounting seat and the outer side of the coupler are provided with the protective cover, the protective cover is of a U-shaped structure, the left side and the right side of the bottom of the protective cover are fixedly connected with the mounting seat through bolts, and the left side and the right side of the protective cover are provided with a plurality of groups of heat dissipation holes.
Through adopting above-mentioned technical scheme, when the output shaft of motor drives the pump shaft through the shaft coupling and rotates, utilize the protection casing to carry out outside protection to the outside of shaft coupling, thereby guarantee that the motor is stable for the pump shaft provides power, the multiunit louvre of utilizing the protection casing outside to offer simultaneously, make the circulation all around of air can follow the protection casing, promote the radiating effect of shaft coupling through the air current of circulation, thereby prevent that the heat that the motor starts the production from being conducted for the shaft coupling through the motor output shaft, be conducted for the pump shaft by the shaft coupling again, and then prevent that the pump shaft is overheated and make the moving ring body be heated and influence first spring through the conduction, increase the life of the pump body through improving the radiating effect simultaneously.
As a preferable scheme of the invention, the front end and the rear end of the bracket are respectively and fixedly connected with the pump cover and the mounting seat through bolts, bearings are respectively arranged at the front end and the rear end of the inside of the bracket and positioned at the outer sides of the pump shafts, and the two groups of bearings are positioned at the outer sides of the bracket and are respectively provided with a gland.
Through adopting above-mentioned technical scheme, when the pump shaft rotates, provide the support through the support for the pump shaft, not only make the rotation of pump shaft more stable, utilize the inboard bearing of support when the pump shaft rotates moreover for the pump shaft rotates more smooth, and frictional force reduces greatly, and the work efficiency of the pump body is higher.
As a preferable scheme of the invention, an oil seal ring is arranged between the inner side of the gland and the pump shaft, and an oil adding head is arranged on the outer side of the gland.
Through adopting above-mentioned technical scheme, add lubricating oil for the inboard of support through the oil filler head in gland outside, guarantee the lubrication of inside bearing, with the oil seal ring then prevent that lubricating oil from spilling and influencing the use.
As a preferable scheme of the invention, the tail end of the inner side of the pump cover and the outer side of the pump shaft are provided with the sealing inner cover, the outer side of the sealing inner cover, which is positioned on the pump cover, is provided with the sealing outer cover, and the back surface of the sealing outer cover is provided with the acid blocking sheet.
Through adopting above-mentioned technical scheme, sealed lid and sealed enclosing cover's cooperation design, when the back at the pump body is installed to the pump cover, further strengthen the sealed effect at pump cover back, and the installation of keeping off the sour piece prevents that the inside of the pump body from when the pumping acid medium, prevents that acid medium from leaking and causing the influence to the environment, and then improves the practicality of the pump body.
As a preferable scheme of the invention, a water seal ring is arranged between the sealing inner cover and the pump shaft, a cooling water channel is arranged in the pump cover, a cooling water adding port is arranged on the outer side of the pump cover in the cooling water channel, and a cooling water seal cap is connected with the outer side of the cooling water adding port in a threaded manner.
Through adopting above-mentioned technical scheme, open the cooling water seal cap, can add the inboard that mouthful sealed lid through the cooling water and add, and then directly cool off the pump shaft, can prevent that the cooling water from leaking out under the effect that has the water seal ring simultaneously and improve the leakproofness of pump cover.
As a preferable scheme of the invention, a sand prevention ring is arranged between the pump cover and the stationary ring body, and the sand prevention ring is in a K-shaped structural design.
Through adopting above-mentioned technical scheme, prevent through sand control circle that the grit from getting into mechanical seal structure's inside, cause mechanical seal structure's wearing and tearing, influence the sealed effect between pump cover and the pump shaft.
As the preferable scheme of the invention, the oil storage cavity is positioned at the outer side of the pump cover and is provided with an oil filling port, the outer side of the oil filling port is in threaded connection with an oil filling sealing cap, and the oil storage cavity is in annular structural design.
By adopting the technical scheme, the oiling sealing cap is opened, and lubricating oil is added into the oil storage cavity through the oiling port.
As a preferable scheme of the invention, a plurality of groups of rollers are arranged, the plurality of groups of rollers are positioned at the outer side of the movable ring body and distributed at equal intervals, the rollers are rotationally connected with the movable ring body, and the roller path is designed in an annular structure.
Through adopting above-mentioned technical scheme, can drive the moving ring body and rotate when the pump shaft rotates, and can drive multiunit gyro wheel when moving the moving ring body and roll in the inboard of raceway, and multiunit gyro wheel has the installation interval in the outside of moving ring body, so the gyro wheel can get into the junction of lubrication hole and raceway and movable block contact at intervals.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through the design of the self-lubricating structure, when the pump body is used, in the process of pump shaft rotation, the first spring is always abutted against the spring seat and the static ring seat at two ends, the static ring body is always abutted against the movable ring body when the static ring seat is abutted against the static ring seat, so that the sealing effect is always achieved when the pump shaft rotates, meanwhile, before the pump body is used, the lubricating oil is firstly added into the oil storage cavity, the movable ring body is driven to rotate when the pump shaft rotates, the movable ring body can drive a plurality of groups of rollers to roll on the inner side of the roller path, and a plurality of groups of rollers are provided with mounting intervals on the outer side of the movable ring body, so that the rollers can enter the connecting part of the lubricating hole and the roller path at intervals to be in contact with the movable block, and the movable block is loose when the movable block is in contact with the movable block at intervals, and the lubricating oil in the oil storage cavity is enabled to enter the clearance between the movable block and the lubricating hole through the oil guide duct, and then flows out slowly to achieve the purposes of lubricating the rollers and the movable ring body, the rolling of the movable ring body is enabled to roll smoothly, the friction force between the movable ring body and the movable ring body is greatly reduced, the friction force between the movable ring body and the movable ring body is increased, the rolling temperature is greatly, the movable ring body is prevented from increasing, the service life of the pump body is greatly, and the sealing temperature is not influenced, and the pump body is not damaged, and the service life of the pump body is also is greatly prolonged.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the overall structure of the present invention;
FIG. 3 is an enlarged schematic view of portion A of FIG. 2;
FIG. 4 is an enlarged schematic view of portion B of FIG. 2;
FIG. 5 is a schematic view of a protective cover structure;
fig. 6 is a schematic diagram of a coupling structure.
In the figure: 1. a pump body; 2. a pump cover; 201. sealing the inner cover; 202. a sealing outer cap; 203. acid blocking sheets; 204. a water seal ring; 205. cooling water seal caps; 206. a sand prevention ring; 3. a pump shaft; 4. a spring seat; 5. a first spring; 6. a stationary ring seat; 7. a stationary ring body; 8. a moving ring body; 9. a self-lubricating structure; 901. an oil storage chamber; 902. a movable cavity; 903. a second spring; 904. a movable block; 905. a lubrication hole; 906. an oil guide passage; 907. a roller; 908. a raceway; 909. oiling and sealing caps; 10. a mounting base; 11. a motor; 12. a coupling; 1201. a protective cover; 1202. a heat radiation hole; 13. a bracket; 1301. a bearing; 1302. a gland; 1303. an oil seal ring; 1304. and (5) an oil adding head.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
Examples:
referring to fig. 1-6, the present invention provides a technical solution:
the utility model provides a centrifugal pump quick-witted seal structure, including the pump body 1, pump cover 2 and pump shaft 3, pump cover 2 installs in the back of the pump body 1, pump shaft 3's outside just is located and installs spring holder 4 between pump shaft 3 and the pump cover 2, pump shaft 3's outside just is located spring holder 4's front and installs first spring 5, pump shaft 3's outside just is located first spring 5's front end and installs quiet ring seat 6, pump shaft 3's outside just is located quiet ring seat 6's front end and installs quiet ring body 7, pump shaft 3's outside just is located quiet ring body 7's front and installs moving ring body 8, install self-lubricating structure 9 between moving ring body 8 and the pump cover 2.
First, in the present embodiment, the specific structure of the self-lubricating structure 9 is as follows:
the self-lubricating structure 9 comprises an oil storage cavity 901, a movable cavity 902, a second spring 903, a movable block 904, a lubricating hole 905, an oil guide channel 906, rollers 907 and a roller path 908, wherein the oil storage cavity 901 is formed at the front end of the inside of the pump cover 2, the movable cavity 902 is symmetrically formed inside the oil storage cavity 901, the second spring 903 is fixedly mounted inside the movable cavity 902, the movable block 904 is fixedly connected to one end of the second spring 903, which is close to the movable ring body 8, the lubricating hole 905 is formed at one side of the movable cavity 902, which is close to the movable ring body 8, the oil guide channel 906 is formed at the left side and the right side of the inside of the lubricating hole 905, the rollers 907 are mounted at the outer side of the movable ring body 8, and the roller path 908 is formed at the position corresponding to the roller 907 at the inner side of the pump cover 2.
Further, mount pad 10 is installed to the bottom of pump body 1, motor 11 is installed to the end of mount pad 10, motor 11's output shaft is connected with pump shaft 3 through shaft coupling 12, the outside of pump shaft 3 just is located the back-mounted of pump cover 2 and has support 13, pump body 1, motor 11 and support 13 are all through bolt and mount pad 10 fixed connection, pump body 1, motor 11 and support 13 are all fixed mounting on mount pad 10, but mount pad 10 fixed mounting is on other equipment simultaneously, when pump body 1 during operation, start motor 11 under the connection of shaft coupling 12 for motor 11's output shaft drives pump shaft 3 and rotates, at pump shaft 3 pivoted in-process, first spring 5 is supported always to quiet ring seat 6, thereby support quiet ring body 7 all the time to the rotating ring body 8, and then play sealed effect all the time when pump shaft 3 rotates.
Still further, the protection casing 1201 is installed at the top of mount pad 10 and is located the outside of shaft coupling 12, protection casing 1201 is U type structural design, the left and right sides of protection casing 1201 bottom all passes through bolt and mount pad 10 fixed connection, multiunit louvre 1202 have all been seted up to the left and right sides of protection casing 1201, when the output shaft of motor 11 passes through shaft coupling 12 and drives pump shaft 3 and rotate, utilize protection casing 1201 to carry out outside protection to shaft coupling 12, thereby guarantee that motor 11 is stable to provide power for pump shaft 3, the multiunit louvre 1202 of seting up in the protection casing 1201 simultaneously, make the air circulate around the protection casing 1201, promote the radiating effect of shaft coupling 12 through the air current of circulation, thereby prevent that motor 11 starts the heat that produces from being conducted for shaft coupling 12 through motor 11 output shaft, be conducted for pump shaft 3 again by shaft coupling 12, and then prevent that pump shaft 3 is overheated makes moving ring body 8 heated through the conduction influence first spring 5, increase pump body 1's life through improving the radiating effect simultaneously.
Then, both ends all pass through the bolt respectively with pump cover 2 and mount pad 10 fixed connection around support 13, the bearing 1301 is all installed in the outside that both ends and be located pump shaft 3 around the inside of support 13, gland 1302 is all installed in the outside that two sets of bearings 1301 are located support 13, when pump shaft 3 rotates, provide the support for pump shaft 3 through support 13, not only make the rotation of pump shaft 3 more stable, utilize the inboard bearing 1301 of support 13 when pump shaft 3 rotates moreover, make pump shaft 3 rotate more smooth, frictional force reduces greatly, pump body 1's work efficiency is higher.
Further, an oil seal 1303 is installed between the inner side of the gland 1302 and the pump shaft 3, an oil filling head 1304 is installed on the outer side of the gland 1302, and lubricating oil is added to the inner side of the bracket 13 through the oil filling head 1304 on the outer side of the gland 1302, so that lubrication of the inner bearing 1301 is ensured, and the lubricating oil is prevented from leaking out and affecting use when the oil seal 1303 is passed.
Wherein, seal inner cup 201 is installed in the terminal of pump lid 2 inboard and the outside that is located pump shaft 3, seal inner cup 201 is located the outside of pump lid 2 and installs sealed enclosing cover 202, seal enclosing cover 202's back side is installed and is kept off sour piece 203, seal inner cup 201 and seal enclosing cover 202's cooperation design, when pump lid 2 is installed in the back of the pump body 1, further strengthen the sealed effect at pump lid 2 back, and keep off sour piece 203's installation prevents that the inside of pump body 1 from leaking when the pumping acid medium, prevents that acid medium from causing the influence to the environment, and then improves the practicality of pump body 1.
Further, install water seal 204 between sealed inner cup 201 and the pump shaft 3, the cooling water passageway has been seted up to the inside of pump cover 2, cooling water passageway has been seted up in the outside that the cooling water passageway is located pump cover 2 and has been added the mouth, the outside threaded connection of cooling water addition mouth has cooling water seal cap 205, open cooling water seal cap 205, can add cooling water to the inboard of sealed inner cup 201 through the cooling water addition mouth, and then directly cool down pump shaft 3, can prevent that the cooling water from leaking out under the effect of water seal 204 simultaneously and improve the leakproofness of pump cover 2.
Secondly, install sand control circle 206 between pump cover 2 and the quiet ring body 7, sand control circle 206 is K structural design, prevents through sand control circle 206 that the grit from getting into mechanical seal structure's inside, causes mechanical seal structure's wearing and tearing, influences the sealed effect between pump cover 2 and the pump shaft 3.
Further, the oil storage cavity 901 is located the outside of the pump cover 2 and is provided with an oil filling port, the outside thread of the oil filling port is connected with an oil filling sealing cap 909, the oil storage cavity 901 is in an annular structural design, the oil filling sealing cap 909 is opened, and lubricating oil is added into the oil storage cavity 901 through the oil filling port.
Finally, the rollers 907 are provided with a plurality of groups, the plurality of groups of rollers 907 are positioned at the outer side of the movable ring body 8 in equidistant distribution, the rollers 907 are rotationally connected with the movable ring body 8, the raceway 908 is in a ring-shaped structure design, the movable ring body 8 is driven to rotate when the pump shaft 3 rotates, the plurality of groups of rollers 907 are driven to roll at the inner side of the raceway 908 when the movable ring body 8 rotates, and the plurality of groups of rollers 907 are provided with installation intervals at the outer side of the movable ring body 8, so that the rollers 907 can enter the connection part of the lubrication holes 905 and the raceway 908 at intervals to contact with the movable blocks 904.
In this embodiment, the implementation scenario specifically includes: when the pump body 1 is used, in the process of rotating the pump shaft 3, the first spring 5 always props against the spring seat 4 and the static ring seat 6 at the two ends, the static ring seat 6 always props against the static ring body 7 against the movable ring body 8, so that the sealing effect is always achieved when the pump shaft 3 rotates, meanwhile, before the pump body 1 is used, the lubricating oil is firstly added into the oil storage cavity 901, the movable ring body 8 is driven to rotate when the pump shaft 3 rotates, the movable ring body 8 drives the plurality of groups of rollers 907 to roll on the inner side of the raceway 908, the plurality of groups of rollers 907 are provided with mounting intervals on the outer side of the movable ring body 8, so that the rollers 907 enter the joint of the lubricating hole 905 and the raceway 908 at intervals to be in contact with the movable block 904, the movable block 904 is connected with the inner part of the movable cavity 902 through the second spring 903, and the loosening of the movable block 904 is caused when the rollers 907 are in interval contact with the movable block 904, the lubricating oil in the oil storage cavity 901 is led to enter the gap between the movable block 904 and the lubricating hole 905 through the oil guide channel 906, and then slowly flows out to achieve the purposes of lubricating the idler wheel 907 and the movable ring body 8, so that the movable ring body 8 is added with the idler wheel 907 on the outer side, the rotation of the movable ring body 8 is smoother and smoother, the friction force between the movable ring body and the pump cover 2 is greatly reduced, the movable ring body 8 can not influence the second spring 903 due to the temperature rise of the friction force, the damage of mechanical seal and the leakage of the pump body 1 are caused, the service life of the movable ring body 8 is prolonged, the temperature rise of the pump shaft 3 is not caused, the service life of the pump body 1 is prolonged, the whole operation flow is simple and convenient, compared with the existing centrifugal pump sealing structure, the smoothness of the centrifugal pump can be improved through the design, the service lives of the movable ring body 8 and the pump body 1 are prolonged.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a centrifugal pump mechanical seal structure, includes pump body (1), pump cover (2) and pump shaft (3), its characterized in that: the pump cover (2) is arranged on the back of the pump body (1), a spring seat (4) is arranged on the outer side of the pump shaft (3) and between the pump shaft (3) and the pump cover (2), a first spring (5) is arranged on the outer side of the pump shaft (3) and on the front surface of the spring seat (4), a static ring seat (6) is arranged on the outer side of the pump shaft (3) and on the front end of the first spring (5), a static ring body (7) is arranged on the outer side of the pump shaft (3) and on the front end of the static ring seat (6), a movable ring body (8) is arranged on the outer side of the pump shaft (3) and on the front surface of the static ring body (7), and a self-lubricating structure (9) is arranged between the movable ring body (8) and the pump cover (2);
the self-lubricating structure (9) comprises an oil storage cavity (901), a movable cavity (902), a second spring (903), a movable block (904), a lubricating hole (905), an oil guide passage (906), rollers (907) and a roller path (908), wherein the oil storage cavity (901) is formed in the front end of the inside of a pump cover (2), the movable cavity (902) is symmetrically formed in the Chu Youqiang (901), the second spring (903) is fixedly mounted in the inside of the movable cavity (902), the movable block (904) is fixedly connected to one end, close to a movable ring body (8), of the second spring (903), the lubricating hole (905) is formed in one side, close to the movable ring body (8), of the movable cavity (902), the oil guide passage (906) is formed in the left side and the right side of the inside of the lubricating hole (905), the rollers (907) are mounted on the outer side of the movable ring body (8), and the roller path (908) is formed in the position, corresponding to the inner side of the pump cover (2), of the roller path (907).
2. The centrifugal pump seal structure according to claim 1, wherein: install mount pad (10) in the bottom of pump body (1), motor (11) are installed to the end of mount pad (10), the output shaft of motor (11) is connected with pump shaft (3) through shaft coupling (12), the outside of pump shaft (3) and be located the back-mounted of pump cover (2) have support (13), pump body (1), motor (11) and support (13) are all through bolt and mount pad (10) fixed connection.
3. The centrifugal pump seal structure according to claim 2, wherein: the top of mount pad (10) and be located the outside of shaft coupling (12) and install protection casing (1201), protection casing (1201) are U type structural design, the left and right sides of protection casing (1201) bottom is all through bolt and mount pad (10) fixed connection, multiunit louvre (1202) have all been seted up to the left and right sides of protection casing (1201).
4. The centrifugal pump seal structure according to claim 2, wherein: the front end and the rear end of the support (13) are fixedly connected with the pump cover (2) and the mounting seat (10) respectively through bolts, bearings (1301) are mounted at the front end and the rear end of the inside of the support (13) and located on the outer side of the pump shaft (3), and a gland (1302) is mounted on the outer side of each of the two groups of bearings (1301) located on the support (13).
5. The centrifugal pump seal structure according to claim 4, wherein: an oil seal ring (1303) is arranged between the inner side of the gland (1302) and the pump shaft (3), and an oil adding head (1304) is arranged on the outer side of the gland (1302).
6. The centrifugal pump seal structure according to claim 1, wherein: the sealing device is characterized in that the sealing inner cover (201) is arranged at the tail end of the inner side of the pump cover (2) and positioned on the outer side of the pump shaft (3), the sealing outer cover (202) is arranged on the outer side of the sealing inner cover (201) positioned on the pump cover (2), and the acid blocking sheet (203) is arranged on the back surface of the sealing outer cover (202).
7. The centrifugal pump seal structure according to claim 6, wherein: install water seal ring (204) between sealed inner cup (201) and pump shaft (3), cooling water passageway has been seted up to the inside of pump cover (2), cooling water adds the mouth in the outside that is located pump cover (2) of cooling water passageway, the outside threaded connection of cooling water adding the mouth has cooling water seal cap (205).
8. The centrifugal pump seal structure according to claim 1, wherein: a sand prevention ring (206) is arranged between the pump cover (2) and the static ring body (7), and the sand prevention ring (206) is in a K-shaped structural design.
9. The centrifugal pump seal structure according to claim 1, wherein: the oil storage cavity (901) is located the outside of pump cover (2) and has seted up the oil filler, the outside threaded connection of oil filler has refuel seal cap (909), oil storage cavity (901) are annular structure form design.
10. The centrifugal pump seal structure according to claim 1, wherein: the roller (907) is provided with a plurality of groups, the plurality of groups of roller (907) are arranged at the outer side of the movable ring body (8) in an equidistant mode, the roller (907) is rotationally connected with the movable ring body (8), and the roller path (908) is designed in an annular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311174125.1A CN117167316A (en) | 2023-09-12 | 2023-09-12 | Centrifugal pump mechanical seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311174125.1A CN117167316A (en) | 2023-09-12 | 2023-09-12 | Centrifugal pump mechanical seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117167316A true CN117167316A (en) | 2023-12-05 |
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ID=88935224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311174125.1A Withdrawn CN117167316A (en) | 2023-09-12 | 2023-09-12 | Centrifugal pump mechanical seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117167316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118242292A (en) * | 2024-04-19 | 2024-06-25 | 江苏兰佛卡压缩机有限公司 | Four-stage compressed air compressor device |
-
2023
- 2023-09-12 CN CN202311174125.1A patent/CN117167316A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118242292A (en) * | 2024-04-19 | 2024-06-25 | 江苏兰佛卡压缩机有限公司 | Four-stage compressed air compressor device |
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Application publication date: 20231205 |