CN216278462U - Automatic seal structure of compensation and have its fuse-element gear pump - Google Patents
Automatic seal structure of compensation and have its fuse-element gear pump Download PDFInfo
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- CN216278462U CN216278462U CN202122434700.XU CN202122434700U CN216278462U CN 216278462 U CN216278462 U CN 216278462U CN 202122434700 U CN202122434700 U CN 202122434700U CN 216278462 U CN216278462 U CN 216278462U
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Abstract
The utility model belongs to the technical field of melt sealing, and particularly relates to an automatic compensation sealing structure and a melt gear pump with the same.
Description
Technical Field
The utility model belongs to the technical field of melt sealing, and particularly relates to an automatic compensation sealing structure and a melt gear pump with the same.
Background
The melt pump is used for conveying a melt medium, generally works under the working condition of high temperature and high pressure, the maximum temperature can reach 350 ℃, the melt medium can be solidified after shutdown and cooling, and generally conventional sealing rings and oil seals cannot meet the requirements. The packing seal is a common seal mode of a melt gear pump, has a good effect when used for sealing molten mass materials, has the characteristics of high temperature resistance, wide application range, safety, reliability, simple structure and the like, is commonly used for shaft seal of a melt pump, and comprises a pump shaft 11, a packing box 12, a seal packing 13, a packing gland 14 and a compression screw 15 as shown in the attached figure 1 of the specification. And a packing cavity is formed between the packing box and the pump shaft after assembly, the sealing packing is arranged in the packing cavity, the packing gland at the rear end presses the sealing packing, and the sealing packing is compressed by a compression screw to expand radially, so that the axial sealing function is realized.
However, the temperature of the melt pump is greatly changed under the working conditions of shutdown and startup, and the compression screw needs to be manually adjusted to maintain the pressing force along with the change of the temperature of the sealing medium, the expansion with heat and the contraction with cold and the change of the abrasion degree of the sealing filler, so that the problems of high maintenance frequency and high failure rate exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides an automatic compensation sealing structure and a melt gear pump with the same, and aims to solve the problems of high maintenance frequency and high failure rate in the prior art.
The utility model discloses an automatic compensation sealing structure and a melt gear pump with the same, which adopt the following technical scheme:
an auto-compensating seal structure comprising:
the stuffing box is arranged on the corresponding shaft body in a penetrating manner, a stuffing cavity is arranged between the inner peripheral surface of the stuffing box and the outer peripheral surface of the shaft body, and sealing stuffing is arranged in the stuffing cavity;
the packing gland is arranged at one end of the opening of the packing cavity on the corresponding shaft body in a penetrating mode and used for keeping the sealing packing in the packing cavity;
and the movable ring is movably arranged outside the corresponding shaft body in a penetrating manner, and an elastic connecting piece is arranged between the movable ring and the packing gland.
As an improvement, the elastic connecting piece is a compression screw which penetrates through the packing gland and is in threaded connection with the movable ring, and a spring which is arranged on the compression screw in a penetrating mode and is arranged between the packing gland and the movable ring.
As a modification, the inner peripheral surface of the movable ring is in sliding fit with the outer peripheral surface of the stuffing box.
As an improvement, the periphery of the stuffing box is provided with a limiting part which extends outwards along the radial direction of the shaft body, the limiting part is provided with a through hole for the compression screw to pass through, and the stuffing gland and the movable ring are distributed on two sides of the limiting part.
As an improvement, the spring is arranged on the pressing screw in a penetrating mode at a position between the movable ring and the limiting portion.
As an improvement, the packing gland is provided with an axial extension part extending along the axial direction of the shaft body, one end of the axial extension part is in plug-in fit with the packing cavity, the other end of the axial extension part is provided with an installation part which is overhung outwards along the radial direction of the shaft body, and the compression screw is arranged on the installation part in a penetrating manner.
The utility model has the beneficial effects that:
the utility model provides an automatic compensation sealing structure which comprises a stuffing box, a stuffing gland and a movable ring, wherein sealing stuffing is arranged between the stuffing box and a shaft body, the stuffing gland is elastically connected with the movable ring, a pre-pressing force is always kept between the stuffing gland and the movable ring, the pressing force is compensated through the elasticity of an elastic connecting piece along with the change of the temperature of a sealing medium, the expansion with heat and the contraction with cold and the change of the abrasion degree of the sealing stuffing, and the automatic compensation sealing structure has the advantages of long maintenance period and low failure rate.
The melt gear pump provided by the utility model adopts the following technical scheme:
melt gear pump, including casing, pump shaft, the pump shaft stretch out the one end of casing with be equipped with seal structure between the casing, its characterized in that, seal structure includes:
the pump comprises a stuffing box, a pump shaft and a pump body, wherein the stuffing box is arranged on the corresponding pump shaft in a penetrating manner, a stuffing cavity is arranged between the inner peripheral surface of the stuffing box and the outer peripheral surface of the pump shaft, and sealing stuffing is arranged in the stuffing cavity;
the packing gland is penetrated and arranged at one end of the opening of the packing cavity on the corresponding pump shaft and is used for keeping the sealing packing in the packing cavity;
and the movable ring is movably arranged outside the corresponding pump shaft in a penetrating manner, and an elastic connecting piece is arranged between the movable ring and the packing gland.
As an improvement, the elastic connecting piece is a compression screw which penetrates through the packing gland and is in threaded connection with the movable ring, and a spring which is arranged on the compression screw in a penetrating mode and is arranged between the packing gland and the movable ring.
As a modification, the inner peripheral surface of the movable ring is in sliding fit with the outer peripheral surface of the stuffing box.
As an improvement, the periphery of the stuffing box is provided with a limiting part which extends outwards along the radial direction of the pump shaft, the limiting part is provided with a through hole for the compression screw to pass through, and the stuffing gland and the movable ring are distributed on two sides of the limiting part.
The utility model has the beneficial effects that:
the utility model provides a melt gear pump, which comprises a shell, a pump shaft and a sealing structure, wherein a packing cavity is formed between a packing box and a shaft body after assembly, sealing packing is arranged in the packing cavity, a packing gland at the rear end presses the sealing packing, a movable ring is arranged on the left side of the packing cavity and sleeved on the excircle of the packing box and can axially slide along the excircle of the packing box, a compression screw sequentially penetrates through the packing gland, the packing box and a compression spring and is screwed into a threaded hole in the movable ring, the compression screw is adjusted to compress the compression spring, and the sealing packing is compressed to radially expand by utilizing the resilience energy storage of the compression spring, so that the axial sealing function is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a prior art seal configuration;
FIG. 2 is a schematic structural view of an embodiment of an automatic compensating seal structure of the present invention;
reference numerals:
11: a pump shaft, 12: stuffing box, 13: seal packing, 14: packing gland, 15: a compression screw;
1: a shaft body; 2: a stuffing box; 3: sealing and filling; 4: a packing gland; 5: a compression screw; 6: a movable ring; 7: a spring.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms than those herein described and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the utility model and, therefore, the utility model is not to be limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
An embodiment of the automatic compensation sealing structure disclosed by the utility model is shown in fig. 2, and the automatic compensation sealing structure comprises a stuffing box 2, a stuffing gland 4 and a movable ring 6, wherein a sealing filler 3 is arranged between the stuffing box 2 and a shaft body 1, the stuffing gland 4 is elastically connected with the movable ring 6, a pre-pressing force is always kept between the stuffing box 2 and the shaft body, and the pressing force is compensated through the elasticity of an elastic connecting piece along with the change of the temperature of a sealing medium, the thermal expansion and the cold contraction and the change of the abrasion degree of the sealing filler 3, so that the automatic compensation sealing structure has the advantages of long maintenance period and low failure rate.
The stuffing box 2 is arranged on the corresponding shaft body 1 in a penetrating way, a stuffing cavity is arranged between the inner peripheral surface of the stuffing box 2 and the outer peripheral surface of the shaft body 1, and a sealing stuffing 3 is arranged in the stuffing cavity.
And the packing gland 4 is arranged at one end of the opening of the packing cavity on the corresponding shaft body 1 in a penetrating mode and used for keeping the sealing packing 3 in the packing cavity.
The movable ring 6 is movably arranged outside the corresponding shaft body 1 in a penetrating way, and an elastic connecting piece is arranged between the movable ring 6 and the packing gland 4.
The elastic connecting piece comprises a compression screw 5 which penetrates through the packing gland 4 and is in threaded connection with the movable ring 6, and a spring 7 which is arranged on the compression screw 5 in a penetrating way and is arranged between the packing gland 4 and the movable ring 6.
The movable ring 6 is movably arranged outside the corresponding pump shaft in a penetrating way, and the inner peripheral surface of the movable ring is in sliding fit with the outer peripheral surface of the stuffing box 2.
In order to prevent the movable ring 6 from sliding down the stuffing box 2, the periphery of the stuffing box 2 is provided with a limiting part which extends outwards along the radial direction of the shaft body 1, the limiting part is provided with a through hole for the compression screw 5 to pass through, and the stuffing gland 4 and the movable ring 6 are distributed at two sides of the limiting part; specifically, the spring 7 is inserted into the hold-down screw 5 at a position between the movable ring 6 and the stopper.
As an improvement, the packing gland 4 is provided with an axial extension part extending along the axial direction of the shaft body 1, one end of the axial extension part is in plug-in fit with the packing cavity, the other end of the axial extension part is provided with an installation part which is overhung outwards along the radial direction of the shaft body 1, and a compression screw 5 is arranged on the installation part in a penetrating mode.
In this embodiment, form the packing chamber between equipment back gland 2 and the axis body 1, the packing chamber is arranged in to gland 3, gland 4 of rear end pushes down gland 3, movable ring 6 sets up the left side in the packing chamber, the cover is on the excircle of gland 2, can be along the axial slip of 2 excircles of gland, housing screw 5 passes gland 4 in proper order, gland 2, compression spring 7 twists in the threaded hole on the movable ring 6, adjustment housing screw 5 makes compression spring 7 compress, utilize compression spring 7's resilience energy storage, it makes its radial expansion to compress tightly gland 3, thereby realize the axial seal function.
Examples of melt gear pumps of the present invention. The melt gear pump comprises a shell and a pump shaft, wherein a sealing structure is arranged between one end, extending out of the shell, of the pump shaft and the shell, the sealing structure comprises a stuffing box, a stuffing cover and a movable ring, sealing stuffing is arranged between the stuffing box and the pump shaft, the stuffing cover is elastically connected with the movable ring, pre-pressing force can be always kept between the stuffing cover and the movable ring, along with the change of the temperature of a sealing medium, the expansion with heat and the contraction with cold and the change of the abrasion degree of the sealing stuffing, the pressing force is compensated through the elasticity of an elastic connecting piece, and the melt gear pump has the advantages of long maintenance period and low failure rate.
And the stuffing box is arranged on the corresponding pump shaft in a penetrating manner, a stuffing cavity is arranged between the inner peripheral surface of the stuffing box and the outer peripheral surface of the pump shaft, and sealing stuffing is arranged in the stuffing cavity.
And the packing gland is penetrated and arranged at one end of the opening of the packing cavity on the corresponding pump shaft and is used for keeping the sealing packing in the packing cavity.
The movable ring is movably arranged outside the corresponding pump shaft in a penetrating way, and an elastic connecting piece is arranged between the movable ring and the packing gland.
The elastic connecting piece comprises a compression screw which penetrates through the packing gland and is in threaded connection with the movable ring, and a spring which penetrates through the compression screw and is arranged between the packing gland and the movable ring.
In the embodiment, the movable ring is arranged outside the stuffing box in a sliding mode, and the inner peripheral surface of the movable ring is in sliding fit with the outer peripheral surface of the stuffing box.
In order to prevent the movable ring from sliding off the stuffing box, the periphery of the stuffing box is provided with a limiting part which extends outwards along the radial direction of the pump shaft, the limiting part is provided with a through hole for a compression screw to pass through, and the stuffing gland and the movable ring are distributed on two sides of the limiting part; in this embodiment, the limiting portion is annular.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An automatically compensating seal structure, comprising:
the stuffing box is arranged on the corresponding shaft body in a penetrating manner, a stuffing cavity is arranged between the inner peripheral surface of the stuffing box and the outer peripheral surface of the shaft body, and sealing stuffing is arranged in the stuffing cavity;
the packing gland is arranged at one end of the opening of the packing cavity on the corresponding shaft body in a penetrating mode and used for keeping the sealing packing in the packing cavity;
and the movable ring is movably arranged outside the corresponding shaft body in a penetrating manner, and an elastic connecting piece is arranged between the movable ring and the packing gland.
2. The automatic compensating sealing structure of claim 1, wherein the elastic connecting member is a compression screw passing through the packing gland and being in threaded connection with the movable ring, and a spring passing through the compression screw and being mounted between the packing gland and the movable ring.
3. An automatically compensating seal according to claim 1, wherein the inner peripheral surface of said movable ring is in sliding engagement with the outer peripheral surface of said stuffing box.
4. The automatic compensation sealing structure of claim 2, wherein the stuffing box has a limiting portion extending radially outward along the shaft body, the limiting portion is provided with a through hole for the compression screw to pass through, and the stuffing cover and the movable ring are distributed on two sides of the limiting portion.
5. The self-compensating seal structure of claim 4, wherein the spring is mounted on the housing at a position on the housing between the movable ring and the stop portion.
6. The self-compensating seal structure of claim 2, wherein the packing gland has an axially extending portion extending in an axial direction of the shaft body, one end of the axially extending portion is fitted into the packing chamber, the other end of the axially extending portion is provided with a mounting portion cantilevered radially outward of the shaft body, and the compression screw is mounted to the mounting portion in a penetrating manner.
7. Melt gear pump, including casing, pump shaft, the pump shaft stretch out the one end of casing with be equipped with seal structure between the casing, its characterized in that, seal structure includes:
the pump comprises a stuffing box, a pump shaft and a pump body, wherein the stuffing box is arranged on the corresponding pump shaft in a penetrating manner, a stuffing cavity is arranged between the inner peripheral surface of the stuffing box and the outer peripheral surface of the pump shaft, and sealing stuffing is arranged in the stuffing cavity;
the packing gland is penetrated and arranged at one end of the opening of the packing cavity on the corresponding pump shaft and is used for keeping the sealing packing in the packing cavity;
and the movable ring is movably arranged outside the corresponding pump shaft in a penetrating manner, and an elastic connecting piece is arranged between the movable ring and the packing gland.
8. The melt gear pump of claim 7, wherein the resilient connecting member is a compression screw threaded through the packing gland and into engagement with the movable ring, and a spring mounted on the compression screw between the packing gland and the movable ring.
9. The melt gear pump of claim 7, wherein an inner peripheral surface of the movable ring is in sliding engagement with an outer peripheral surface of the stuffing box.
10. The melt gear pump of claim 8, wherein the outer periphery of the stuffing box is provided with a limiting part extending outwards in the radial direction of the pump shaft, the limiting part is provided with a through hole for the compression screw to pass through, and the stuffing gland and the movable ring are distributed on two sides of the limiting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122434700.XU CN216278462U (en) | 2021-10-11 | 2021-10-11 | Automatic seal structure of compensation and have its fuse-element gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122434700.XU CN216278462U (en) | 2021-10-11 | 2021-10-11 | Automatic seal structure of compensation and have its fuse-element gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216278462U true CN216278462U (en) | 2022-04-12 |
Family
ID=81067956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122434700.XU Active CN216278462U (en) | 2021-10-11 | 2021-10-11 | Automatic seal structure of compensation and have its fuse-element gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216278462U (en) |
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2021
- 2021-10-11 CN CN202122434700.XU patent/CN216278462U/en active Active
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