CN219012980U - Silicon carbide ceramic pump cover capable of reducing mechanical seal abrasion - Google Patents
Silicon carbide ceramic pump cover capable of reducing mechanical seal abrasion Download PDFInfo
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- CN219012980U CN219012980U CN202222652528.XU CN202222652528U CN219012980U CN 219012980 U CN219012980 U CN 219012980U CN 202222652528 U CN202222652528 U CN 202222652528U CN 219012980 U CN219012980 U CN 219012980U
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Abstract
The utility model discloses a silicon carbide ceramic pump cover for reducing mechanical seal abrasion, which comprises a metal framework and a silicon carbide ceramic lining, wherein the front end of the metal framework is an annular connecting plate, an inner ring and an outer ring of the annular connecting plate are respectively fixed with a cylindrical supporting part which extends backwards and is coaxial, the front section of the inner wall of the inner cylindrical supporting part is a circular table surface which converges backwards, and the rear section of the inner wall of the inner cylindrical supporting part is a cylindrical surface for connecting mechanical seal; an annular connecting table is processed at the outer edge of the rear end of the outer cylindrical supporting part; the front side face of the annular connecting plate in the metal framework, the outer wall of the outer side cylindrical supporting part and the front section circular table face of the inner wall of the inner side cylindrical supporting part are uniformly pressed with silicon carbide ceramic lining, and a group of blades which are uniformly distributed in circumference and radially extend are arranged on the silicon carbide ceramic lining of the front section circular table face of the inner wall of the inner side cylindrical supporting part of the metal framework. The silicon carbide ceramic pump cover effectively prolongs the service life of the mechanical seal.
Description
Technical Field
The utility model relates to a silicon carbide ceramic pump cover capable of reducing mechanical seal abrasion, and belongs to the field of fluid machinery.
Background
Silicon carbide ceramics are nonmetallic composite materials with extremely high hardness and extremely high chemical corrosion resistance, and are generally applied to stations with high abrasiveness.
The ceramic silicon carbide pump is a centrifugal pump with special structure, and its overflow component is formed from pump body, impeller, rear pump cover and pump shaft. In order to ensure that the silicon carbide ceramic pump has extremely high abrasion resistance, the pump body, the impeller and the rear pump cover are all of metal framework lining silicon carbide ceramic structures, but the requirements of supporting strength and connection with driving equipment are met, and the pump shaft is processed by adopting metal materials. The mechanical seal which is limited by the structural size and is rotationally connected between the rear pump cover and the pump shaft is still processed by adopting metal materials, and the mechanical seal is used for sealing the medium in the pump body.
In the running process of the existing silicon carbide ceramic pump, the service life of the mechanical seal is generally not more than 1 year, especially in the high-abrasion working condition, the service life of the mechanical seal is only 2-3 months, and only 10% of the service life of the silicon carbide ceramic component is reached, so that the mechanical seal becomes a weak point for large-scale application of the silicon carbide ceramic pump, and the running cost is increased.
Disclosure of Invention
The utility model aims to solve the problem of short service life of a mechanical seal in a traditional silicon carbide ceramic pump, and provides a silicon carbide ceramic pump cover capable of reducing mechanical seal abrasion.
The utility model aims at realizing the following technical scheme:
the utility model relates to a silicon carbide ceramic pump cover for reducing mechanical seal abrasion, which comprises a metal framework and a silicon carbide ceramic lining, wherein the front end of the metal framework is an annular connecting plate, an inner ring and an outer ring of the annular connecting plate are respectively fixed with a cylindrical supporting part which extends backwards and is coaxial, the front section of the inner wall of an inner cylindrical supporting part is a circular table surface which converges backwards, and the rear section of the inner wall of the inner cylindrical supporting part is a cylindrical surface for connecting mechanical seal; the outer edge of the rear end of the outer cylindrical supporting part is provided with an annular connecting table for connecting with the rear end of the pump body; the front side plate surface of the annular connecting plate in the metal framework, the outer wall of the outer cylindrical supporting part and the front section circular table surface of the inner wall of the inner cylindrical supporting part are uniformly pressed with silicon carbide ceramic lining, and a group of blades which are uniformly distributed in circumference and radially extend are arranged on the silicon carbide ceramic lining of the front section circular table surface of the inner wall of the inner cylindrical supporting part of the metal framework;
the cylindrical surface of the inner wall rear section of the metal framework inner side cylindrical supporting part is connected with the pump shaft through a mechanical seal, and the annular connecting table of the metal framework outer side cylindrical supporting part is connected with the rear end flange of the pump body.
The number of the blades is 4-8.
The side plates on one side of the blade are straight plates extending in the radial direction, the side plates on the other side of the blade are inclined plates converging downwards, and the angle between the inclined plates and the straight plates is 15-30 degrees.
The taper of the front section circular table surface of the inner wall of the inner side cylindrical supporting part in the metal framework is 30-60 degrees.
The area of the pump cover metal framework pressed silicon carbide ceramic lining is provided with an annular groove so as to improve the binding force between the metal framework and the silicon carbide ceramic lining.
Principle of operation
In the running process of the ceramic pump, the medium at the back side of the impeller can rotate at a high speed along with the impeller, and as the front section of the inner wall of the cylindrical supporting part at the inner side of the pump cover is a circular table surface, the backflow of deposited solid particles can be accelerated, the deposited solid particles are prevented from being accumulated at the joint of the pump cover and the machine seal, and the abrasion of the deposited solid particles to the machine seal is avoided; the blades at the front section of the inner wall of the cylindrical supporting part at the inner side of the pump cover can weaken the rotation speed of the medium at the back side of the impeller, and meanwhile, local vortex is prevented from being generated, so that the direct abrasion of solid particles rotating at high speed to the machine seal is avoided.
Advantageous effects
The silicon carbide ceramic pump cover has reasonable structure and simple forming mode. In the implemented case, the silicon carbide ceramic pump cover plays a role in protecting the mechanical seal, and the service life of the mechanical seal is prolonged by more than 3 times.
Drawings
FIG. 1 is a schematic diagram of a silicon carbide ceramic pump cap of the present utility model;
FIG. 2 is a cross-sectional view of a vane in a silicon carbide ceramic pump cap of the present utility model;
in the figure, a 1-metal framework, a 2-silicon carbide ceramic lining and 3-blades are adopted.
Detailed Description
The utility model is further described below with reference to the drawings and examples:
examples
As shown in fig. 1, the silicon carbide ceramic pump cover for reducing the mechanical seal abrasion comprises a metal framework 1 and a silicon carbide ceramic lining 2, wherein the front end of the metal framework 1 is an annular connecting plate, the inner ring and the outer ring of the annular connecting plate are respectively fixed with a cylindrical supporting part which extends backwards and is coaxial, the front section of the inner wall of the inner cylindrical supporting part is a cylindrical surface which converges backwards, and the rear section of the inner wall of the inner cylindrical supporting part is a cylindrical surface for connecting the mechanical seal; the outer edge of the rear end of the outer cylindrical supporting part is provided with an annular connecting table for connecting with the rear end of the pump body; the silicon carbide ceramic lining 2 is uniformly pressed on the front side plate surface of the annular connecting plate in the metal framework 1, the outer wall of the outer cylindrical supporting part and the front section circular table surface of the inner wall of the inner cylindrical supporting part, and a group of blades 3 which are uniformly distributed in circumference and radially extend are arranged on the silicon carbide ceramic lining 2 pressed on the front section circular table surface of the inner wall of the inner cylindrical supporting part of the metal framework 1;
the cylindrical surface of the rear section of the inner wall of the cylindrical supporting part at the inner side of the metal framework 1 is connected with the pump shaft through a mechanical seal, and the annular connecting table of the cylindrical supporting part at the outer side of the metal framework 1 is connected with the rear end flange of the pump body.
The number of the blades 3 is 6.
As shown in fig. 2, one side plate of the vane 3 is a straight plate extending radially, and the other side plate is a downward converging inclined plate, and an angle α between the inclined plate and the straight plate is 25 °.
The taper beta of the front section circular table surface of the inner wall of the inner side cylindrical supporting part in the metal framework 1 is 40 degrees.
An annular groove is formed in the area of the metal framework 1, where the silicon carbide ceramic lining 2 is pressed, so that the binding force between the metal framework 1 and the silicon carbide ceramic lining 2 is improved.
In the running process of the ceramic pump, the medium at the back side of the impeller can rotate at a high speed along with the impeller, and as the front section of the inner wall of the cylindrical supporting part at the inner side of the pump cover is a circular table surface, the backflow of deposited solid particles can be accelerated, the deposited solid particles are prevented from being accumulated at the joint of the pump cover and the machine seal, and the abrasion of the deposited solid particles to the machine seal is avoided; the blades at the front section of the inner wall of the cylindrical supporting part at the inner side of the pump cover can weaken the rotation speed of the medium at the back side of the impeller, and meanwhile, local vortex is prevented from being generated, so that the direct abrasion of solid particles rotating at high speed to the machine seal is avoided.
Claims (5)
1. A silicon carbide ceramic pump cover for reducing mechanical seal abrasion is characterized in that: the pump cover comprises a metal framework and a silicon carbide ceramic lining, wherein the front end of the metal framework is an annular connecting plate, an inner ring and an outer ring of the annular connecting plate are respectively fixed with a cylindrical supporting part which extends backwards and is coaxial, the front section of the inner wall of the inner cylindrical supporting part is a round table surface which converges backwards, and the rear section of the inner wall of the inner cylindrical supporting part is a cylindrical surface for connecting a machine seal; the outer edge of the rear end of the outer cylindrical supporting part is provided with an annular connecting table for connecting with the rear end of the pump body; the front side plate surface of the annular connecting plate in the metal framework, the outer wall of the outer cylindrical supporting part and the front section circular table surface of the inner wall of the inner cylindrical supporting part are uniformly pressed with silicon carbide ceramic lining, and a group of blades which are uniformly distributed in circumference and radially extend are arranged on the silicon carbide ceramic lining of the front section circular table surface of the inner wall of the inner cylindrical supporting part of the metal framework;
the cylindrical surface of the inner wall rear section of the metal framework inner side cylindrical supporting part is connected with the pump shaft through a mechanical seal, and the annular connecting table of the metal framework outer side cylindrical supporting part is connected with the rear end flange of the pump body.
2. The silicon carbide ceramic pump cap for reducing wear of a machine seal of claim 1, wherein: the number of the blades is 4-8.
3. The silicon carbide ceramic pump cap for reducing wear of a machine seal of claim 1, wherein: the side plates on one side of the blade are straight plates extending in the radial direction, the side plates on the other side of the blade are inclined plates converging downwards, and the angle between the inclined plates and the straight plates is 15-30 degrees.
4. The silicon carbide ceramic pump cap for reducing wear of a machine seal of claim 1, wherein: the taper of the front section circular table surface of the inner wall of the inner side cylindrical supporting part in the metal framework is 30-60 degrees.
5. A silicon carbide ceramic pump cap for reducing wear of a machine seal according to any one of claims 1 to 4, wherein: the area of the pump cover metal framework pressed silicon carbide ceramic lining is provided with an annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222652528.XU CN219012980U (en) | 2022-09-30 | 2022-09-30 | Silicon carbide ceramic pump cover capable of reducing mechanical seal abrasion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222652528.XU CN219012980U (en) | 2022-09-30 | 2022-09-30 | Silicon carbide ceramic pump cover capable of reducing mechanical seal abrasion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219012980U true CN219012980U (en) | 2023-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222652528.XU Active CN219012980U (en) | 2022-09-30 | 2022-09-30 | Silicon carbide ceramic pump cover capable of reducing mechanical seal abrasion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219012980U (en) |
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2022
- 2022-09-30 CN CN202222652528.XU patent/CN219012980U/en active Active
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