CN221003751U - High-rotation-speed mechanical sealing element for boiler feed pump - Google Patents
High-rotation-speed mechanical sealing element for boiler feed pump Download PDFInfo
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- CN221003751U CN221003751U CN202322338716.XU CN202322338716U CN221003751U CN 221003751 U CN221003751 U CN 221003751U CN 202322338716 U CN202322338716 U CN 202322338716U CN 221003751 U CN221003751 U CN 221003751U
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- contact part
- stationary ring
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- 238000007789 sealing Methods 0.000 title claims abstract description 48
- 230000003068 static effect Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Mechanical Sealing (AREA)
Abstract
A mechanical seal for a high-speed boiler feed pump includes a main shaft, a base assembly, a seal assembly, a clamping mechanism, and a fixed plate. The base assembly comprises a first base, a second base and a first sealing ring. The seal assembly includes a moving ring, a stationary ring, and an anti-rotation pin. The moving ring includes a moving ring main body, and a moving ring fixing member. The movable ring main body is provided with a second sealing groove, and the movable ring fixing piece is provided with a third sealing groove. The stationary ring includes a stationary ring connector and a stationary ring body. The rotation of the stationary ring main body is limited by arranging one anti-rotation pin between the stationary ring main body and the stationary ring fixing seat. The spring is arranged on the stationary ring fixing seat and abuts against the stationary ring main body, so that the stationary ring main body and the moving ring main body are always kept against each other, the problem that the spring deforms due to rotation of the moving ring main body in the past is avoided, and the service life of the spring is prolonged.
Description
Technical Field
The utility model relates to the technical field of mechanical sealing elements, in particular to a mechanical sealing element of a high-rotation-speed boiler feed pump.
Background
Currently, in the devices such as pumps and compressors, since the transmission shaft penetrates inside and outside the device, there is a circumferential gap between the shaft and the device, through which the medium in the device leaks outwards, and if the pressure in the device is lower than the atmospheric pressure, air leaks into the device, so that a shaft seal device for preventing leakage is necessary. The mechanical seal is one of the shaft seals, and is also called end face seal, and is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation transmission axis and keeping fit and sliding relatively under the action of fluid pressure and the elasticity or magnetic force of the compensation mechanism and the cooperation of auxiliary seal. The mechanical seal comprises a static ring assembly, a movable ring assembly and a spring, wherein the static ring assembly is sleeved on a transmission shaft and is tightly matched in a mounting hole of a pump body, the movable ring assembly is tightly matched on the transmission shaft, gap compensation is carried out between the static ring assembly and the movable ring assembly through end face sealing and through the spring, the working condition of the mechanical seal for the boiler feed pump at present is characterized by high rotating speed, high temperature, high pressure and severe working condition, the problem that the static ring seat and the end cover frequently collide to crack frequently occurs, under the state, each part in the mechanical seal easily generates too high temperature rise, particularly the spring is failed once the spring is failed due to overheating, and the mechanical seal is easy to fail.
Disclosure of utility model
In view of the above, the present utility model provides a mechanical seal for a high-speed boiler feed pump to solve the above-mentioned technical problems.
The mechanical seal for the high-rotation-speed boiler feed water pump comprises a main shaft, a base assembly arranged on the main shaft, a sealing assembly arranged on the main shaft and abutted against the base assembly, a clamping mechanism arranged on the sealing assembly, a fixed plate arranged between the clamping mechanism and the sealing assembly, a shaft sleeve sleeved on the main shaft, the base assembly comprises a first base, a second base abutted against the first base, two first sealing rings arranged between the first base and the second base, a first sealing groove arranged on one side of the second base, facing towards the main shaft, a clamping strip arranged at the port of the first sealing groove, a movable ring arranged in the second base, a static ring arranged on one side of the clamping mechanism, a plurality of anti-rotation pins arranged between the movable ring and the static ring, the static ring comprises a main body arranged on the shaft sleeve, a second base abutted against the first base, two first sealing rings arranged on the main body, a spring arranged on the static ring, at least one static ring and a fixed ring arranged between the static ring and the fixed ring, at least one fixed ring is abutted against the fixed ring, and at least one fixed ring is arranged in the fixed groove arranged on the main body, the fixed ring is abutted against the fixed ring, and at least one fixed ring is arranged on the fixed ring through a fixed groove arranged between the fixed ring and the fixed ring, the fixed plate is arranged on the stationary ring in a threaded connection mode, and one end of the fixed plate is embedded into the movable ring.
Further, the first base includes a first contact portion contacting the outer end surface of the spindle, a second contact portion contacting the second base, and a third contact portion contacting the second base.
Further, the end surfaces of the first contact portion, the second contact portion and the third contact portion, which face the main shaft, are parallel to the outer end surface of the main shaft.
Further, the second base includes a fourth contact portion abutting the second contact portion, a fifth contact portion, and a sixth contact portion abutting the third contact portion.
Further, the fourth contact portion is not in contact with the spindle.
Further, a first sealing groove is formed in each of the end faces of the fourth contact portion and the sixth contact portion, which face the first base.
Further, a gap is left between the movable ring fixing piece and the second base.
Further, a third sealing groove is further formed between the stationary ring main body and the stationary ring connecting piece.
Compared with the prior art, the mechanical sealing piece for the high-rotation-speed boiler feed pump is characterized in that the base component is arranged on the main shaft. And a sealing ring is arranged between the first base and the second base. The seal assembly is disposed through the base assembly. And a sealing ring is arranged between the movable ring and the static ring, so that the tightness is improved. The rotation of the stationary ring main body is limited by arranging one anti-rotation pin between the stationary ring main body and the stationary ring fixing seat. The spring is arranged on the stationary ring fixing seat and abuts against the stationary ring main body, so that the stationary ring main body and the moving ring main body are always kept against each other, the problem that the spring deforms due to rotation of the moving ring main body in the past is avoided, and the service life of the spring is prolonged.
Drawings
Fig. 1 is a schematic structural view of a mechanical seal for a high-speed boiler feed pump provided by the utility model.
Detailed Description
Specific embodiments of the present utility model are described in further detail below. It should be understood that the description herein of the embodiments of the utility model is not intended to limit the scope of the utility model.
Fig. 1 is a schematic structural view of a mechanical seal for a high-rotation-speed boiler feed pump according to the present utility model. The mechanical seal for the high-speed boiler feed water pump comprises a main shaft 10, a base assembly 20 arranged on the main shaft 10, a sealing assembly 30 arranged on the main shaft 10 and abutting against the base assembly 20, a fixing plate 40 arranged on the sealing assembly 30, and a clamping mechanism 50 arranged between the fixing plate 40 and the sealing assembly 30. It is conceivable that the mechanical seal of the high-speed boiler feedwater pump also includes other functional structures, such as connecting bolts, gaskets, etc., which are known to those skilled in the art and will not be described in detail herein.
The main shaft 10 is a shaft body with multiple steps, and the main shaft 10 is sleeved with a shaft sleeve 11 for installing the base component 20, the sealing component 30, the fixing plate 40, the clamping mechanism 50 and the like.
The base assembly 20 includes a first base 21 provided on an end portion of the spindle 10, and a second base 22 abutting the first base 21.
The first base 21 includes a first contact portion 211 contacting an outer end surface of the spindle 10, a second contact portion 212 contacting the second base 22, and a third contact portion 213 contacting the second base 22. The end surfaces of the first contact portion 211, the second contact portion 212, and the third contact portion 213 facing the main shaft 10 are parallel to the outer end surface of the main shaft 10.
The second base 22 is stepped. The second base 22 includes a fourth contact portion 221 abutting the second contact portion 212, a fifth contact portion 222, and a sixth contact portion 223 abutting the third contact portion 213. And the fourth contact portion 221 is not in contact with the spindle 10, i.e., a gap is left between the fourth contact portion 221 and the spindle 10.
The second base 22 is provided with a first sealing groove 224 on a side facing the spindle 10, and a clamping bar 225 disposed at a port of the first sealing groove 224. The first seal groove 224 and the clamping bar 225 are used for installing the seal assembly 30.
The fourth contact portion 221 and the sixth contact portion 223 are each provided with a first seal groove 224 on an end surface facing the first base 21. A first sealing groove 224 is arranged on one side, close to the clamping strip 225, of the end face, facing away from the first base 21, of the second base 22. Each first sealing groove 224 is provided with a sealing ring, so as to improve the sealing effect.
At least two water inlets and outlets 23 are also arranged on the second base 22. The water inlet and outlet 23 is communicated with the inner side wall of the second base 22.
The sealing assembly 30 includes a moving ring 31 provided in the second base 22, a stationary ring 32 provided at one side of the moving ring 31, and a plurality of anti-rotation pins 33 provided between the moving ring 31 and the stationary ring 32.
The moving ring 31 includes a moving ring main body 311 provided on the shaft housing 11, and a moving ring fixing member 312 provided on the moving ring main body 311. The movable ring fixing element 312 is connected with the shaft sleeve 11 through a fixing pin 313. At least one second seal groove 314 is provided on the end surface of the movable ring fixing element 312, which is attached to the movable ring main body 311. A seal ring is disposed within the second seal groove 314. A gap is left between the movable ring retainer 312 and the second base 22 to facilitate fluid flow. The moving ring 31 rotates together with the main shaft 10.
The stationary ring 32 includes a stationary ring body 321 disposed between the movable ring body 311 and the movable ring mount 312, and a stationary ring fixing base 322 fastened to the fastening strip 225. The stationary ring fixing base 322 is connected with the second base 22 through bolts. A plurality of anti-rotation pins 33 are arranged between the stationary ring main body 321 and the stationary ring fixing seat 322. The stationary ring main body 321 and the stationary ring fixing seat 322 are connected together through the anti-rotation pin 33, so that the stationary ring 32 does not rotate along with the movable ring 31.
The stationary ring fixing seat 322 is provided with at least one spring accommodating groove 323, each spring accommodating groove 323 is internally provided with a spring 324, and the free end of the spring 324 is abutted to the stationary ring main body 321 to tightly abut against the stationary ring main body 321 towards the direction of the movable ring 31. And because the anti-rotation pin 33 is arranged between the stationary ring main body 321 and the stationary ring fixing seat 322, the stationary ring main body 321 can not rotate, and the deformation of the spring 324 caused by small-amplitude rotation when the stationary ring main body 321 is in contact with the movable ring 31 is avoided, so that the anti-rotation device is applicable to higher rotation speed.
A third seal groove 325 is further provided between the stationary ring fixing base 322 and the stationary ring main body 321. A sealing ring is also disposed in the third sealing groove 325, so as to improve the sealing performance.
The fixing plate 40 is screwed on the stationary ring fixing base 322. And one side of the fixing plate 40 is embedded in the moving ring body 311 so as to close the moving ring 31 between the second base 22 and the main shaft 10.
The clamping mechanism 50 includes a clamping ring 51 provided on the movable ring body 311, and a clamping bolt 52 connecting both end portions of the clamping ring 51. The clamping ring 51 is used to clamp the moving ring 31 to the spindle 10. When the clamping ring 51 is clamped on the movable ring main body 311, the clamping bolt 52 is used for screwing to clamp the clamping ring 51, so that the fit degree between the movable ring main body 311 and the main shaft 10 is increased.
Compared with the prior art, the mechanical sealing element of the high-rotation-speed boiler feed pump is characterized in that the base assembly 20 is arranged on the main shaft 10. A sealing ring is provided between the first base 21 and the second base 22. The seal assembly 30 is disposed through the base assembly 20. A seal ring is similarly provided between the movable ring 31 and the stationary ring 32 to improve the sealing property. The rotation of the stationary ring body 321 is restricted by providing the anti-rotation pin 33 between the stationary ring body 321 and the stationary ring holder 322. Through set up on the quiet ring fixing base 322 spring 324 and support tightly quiet ring main part 321 makes still keep support tightly between quiet ring main part 321 and the moving ring main part 311 all the time, and avoided former moving ring main part 311 to rotate and lead to the problem that spring 324 takes place deformation, extension spring 324's life.
The above is only a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model, and any modifications, equivalent substitutions or improvements within the spirit of the present utility model are intended to be covered by the claims of the present utility model.
Claims (8)
1. A high rotational speed boiler feed pump mechanical seal, characterized in that: the mechanical sealing element of the high-rotation-speed boiler feed water pump comprises a main shaft, a base component arranged on the main shaft, a sealing component arranged on the main shaft and propped against the base component, a clamping mechanism arranged on the sealing component, and a fixing plate arranged between the clamping mechanism and the sealing component, wherein the main shaft is sleeved with a shaft sleeve, the base component comprises a first base, a second base propped against the first base, and two first sealing rings arranged between the first base and the second base, one side of the second base facing the main shaft is provided with a first sealing groove, and a clamping strip arranged at the port of the first sealing groove, the sealing component comprises a moving ring arranged in the second base, a static ring arranged at one side of the moving ring, the movable ring comprises a movable ring main body arranged on the shaft sleeve and a movable ring fixing piece arranged on the movable ring main body, the movable ring fixing piece is connected with the shaft sleeve through a fixing pin shaft, at least one second sealing groove is arranged on the end face, where the movable ring fixing piece is attached, of the movable ring main body, the stationary ring comprises a stationary ring connecting piece arranged between the movable ring main body and the movable ring fixing piece, and a stationary ring main body clamped and arranged on the clamping strip, at least one spring accommodating groove is arranged on the stationary ring fixing seat, a spring is arranged in each spring accommodating groove, the free end of the spring is abutted with the stationary ring main body, the spring abuts against the stationary ring main body towards the movable ring direction, the fixed plate is arranged on the stationary ring in a threaded connection mode, and one end of the fixed plate is embedded into the movable ring.
2. The high rotational speed boiler feedwater pump mechanical seal of claim 1, wherein: the first base comprises a first contact part contacted with the outer end surface of the main shaft, a second contact part contacted with the second base and a third contact part contacted with the second base.
3. The high rotational speed boiler feedwater pump mechanical seal of claim 2, wherein: the end faces of the first contact part, the second contact part and the third contact part, which face the main shaft, are parallel to the outer end face of the main shaft.
4. The high rotational speed boiler feedwater pump mechanical seal of claim 2, wherein: the second base comprises a fourth contact part, a fifth contact part and a sixth contact part, wherein the fourth contact part is in contact with the second contact part, and the sixth contact part is in contact with the third contact part.
5. The high rotational speed boiler feedwater pump mechanical seal of claim 4, wherein: the fourth contact portion is not in contact with the spindle.
6. The high rotational speed boiler feedwater pump mechanical seal of claim 4, wherein: and the end surfaces of the fourth contact part and the sixth contact part, which face the first base, are provided with a first sealing groove.
7. The high rotational speed boiler feedwater pump mechanical seal of claim 1, wherein: and a gap is reserved between the movable ring fixing piece and the second base.
8. The high rotational speed boiler feedwater pump mechanical seal of claim 1, wherein: and a third sealing groove is further arranged between the stationary ring main body and the stationary ring connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322338716.XU CN221003751U (en) | 2023-08-29 | 2023-08-29 | High-rotation-speed mechanical sealing element for boiler feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322338716.XU CN221003751U (en) | 2023-08-29 | 2023-08-29 | High-rotation-speed mechanical sealing element for boiler feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221003751U true CN221003751U (en) | 2024-05-24 |
Family
ID=91122178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322338716.XU Active CN221003751U (en) | 2023-08-29 | 2023-08-29 | High-rotation-speed mechanical sealing element for boiler feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221003751U (en) |
-
2023
- 2023-08-29 CN CN202322338716.XU patent/CN221003751U/en active Active
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