Self-diversion sealing impeller
By opening spiral grooves on both ends of the impeller of the aluminum liquid pump, reverse blades are formed, and leakage is prevented by high-pressure and low-flow aluminum liquid flow, and self-direction of the internal and external through the spiral groove is achieved, which solves the problem of high-temperature conditions The problems of liquid aluminum leakage and easy oxidation of impellers improve the efficiency and service life of the impeller.
Patent Information
- Application Number
- CN202421150701.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-24
AI Technical Summary
Under high temperature conditions, the seal between the impeller and the volute of the aluminum liquid pump is difficult to achieve, resulting in liquid aluminum leakage, and the graphite impeller is prone to oxidation and erosion, shortening its service life.
A self-guided sealed impeller is designed to form reverse blades by opening spiral grooves on both ends of the impeller, and the reverse blades are used to generate high-pressure and low-flow aluminum liquid flow to prevent leakage, and to form internal and external self-guiding through the spiral groove. flow, achieve liquid sealing.
It effectively reduces liquid aluminum leakage, increases the output pressure and flow of the impeller, extends the service life of the impeller, and reduces the cost of use.
Smart Images
Figure CN222436653U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sealed impellers for aluminum liquid pumps, and in particular relates to a self-guiding sealed impeller. Background Art
[0002] As a molten aluminum pump specially used for high-temperature aluminum liquid transportation, the sealing between the driving impeller and the volute has always been a difficult problem. Although the design of the molten aluminum pump refers to the design principle of general water pumps, due to the characteristics of high temperature (above 700℃) of aluminum liquid, it cannot be completely designed in accordance with general water pumps.
[0003] 1. In order to solve the problem of high temperature, a very long cantilever motor output shaft is often required. The extended cantilever output shaft is prone to shaking in structure. When the shaking cannot be solved, the gap between the impeller and the volute must be increased; 2. Since there are many particles mixed in the molten aluminum liquid (such as unmelted metal silicon, refractory particles dropped from the furnace, etc.), in order to prevent the particles from getting stuck and breaking the impeller, the gap needs to be left a little larger; 3. Unlike water pumps, the output shaft and rotating impeller used in aluminum water pumps are generally made of graphite. Under the action of high-temperature aluminum water, oxidation corrosion will occur in a short time, which will also increase the gap between the impeller and the volute, resulting in a decrease in the service life and efficiency of the impeller;
[0004] To avoid the above phenomenon, see Figure 1-2 As shown, a gap of 1-2 cm is reserved between the upper and lower sealing surfaces of the rotating impeller and the volute to offset the shaking of the rotating impeller, and the upper and lower sealing surfaces of the impeller and the volute are lengthened, in an attempt to reduce leakage and improve the efficiency of the impeller by lengthening the gap and increasing the resistance between the gaps. However, due to the easy oxidation and erosion of graphite at high temperatures, the design of the reserved gap will quickly increase, causing the efficiency of the graphite impeller to drop rapidly, losing its use value and reducing the service life of the impeller. Utility Model Content
[0005] The utility model aims to provide a self-guiding sealing impeller to solve the technical defect of aluminum liquid leakage caused by the reserved gap between the rotating impeller and the volute.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] The self-guiding sealed impeller comprises an impeller body for connecting to the output shaft of the aluminum liquid pump. The impeller body is an internal cavity, and a plurality of drainage ports penetrating the internal cavity of the impeller body are arranged on the side wall of the impeller body; the upper end of the impeller body is a closed shaft end for connecting to the output shaft of the aluminum liquid pump; the lower end of the impeller body penetrates the internal cavity; and a plurality of reverse blades are formed on the side walls at both ends of the impeller body.
[0008] As a further solution of the utility model, a plurality of reverse blades are formed by opening a plurality of spiral grooves on the side walls at both ends of the impeller body, the plurality of spiral grooves are arranged in the same direction, and the plurality of spiral grooves are connected to a plurality of drainage ports.
[0009] As a further preferred solution of the utility model, a plurality of reverse blades distributed on the side walls at both ends of the impeller body are symmetrically arranged.
[0010] As a preferred embodiment of the present invention, the spiral groove on the upper side wall of the impeller body is an upper spiral groove, and the spiral groove on the lower side wall of the impeller body is a lower spiral groove; the spiral direction of the upper spiral groove runs from top to bottom; the spiral direction of the lower spiral groove runs from bottom to top.
[0011] As a further solution of the utility model, the impeller body is rotatably installed in the volute of the aluminum liquid pump.
[0012] As a further solution of the utility model, the reverse blades are located at the sealing position of the impeller body and the volute of the aluminum liquid pump.
[0013] As a further solution of the utility model, the impeller body and the reverse blades are both made of graphite material.
[0014] As a further solution of the utility model, the reverse blades distributed at both ends of the impeller body are arranged in a spiral with equal angles around the central axis of the impeller body.
[0015] Compared with the prior art, the self-guiding sealed impeller provided by the utility model has the following beneficial effects:
[0016] The utility model adds reverse blades to the impeller at the sealing part of the graphite impeller and the volute of the aluminum liquid pump, when the gap between the impeller and the volute cannot be reduced in the traditional design, and utilizes the reverse blades to generate high-pressure and low-flow aluminum liquid to the middle discharge port of the impeller, so as to prevent the aluminum liquid from leaking to the two ends. The aluminum liquid passes through a plurality of spiral grooves to form internal and external self-guiding, so as to realize liquid sealing between the impeller and the volute of the aluminum liquid pump, reduce the leakage of aluminum liquid, increase the output pressure and flow of the impeller, and improve the efficiency; and after the impeller has been used for a period of time, after the impeller is oxidized and corroded, the gap between the impeller and the volute increases, and when the leakage increases, a few more spiral grooves can be added to the two ends of the impeller to increase the pressure and flow of the reverse flow inward at the two ends, so as to improve the service life of the impeller and reduce the use cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only examples of the embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a structural schematic diagram of an impeller in the prior art;
[0019] Figure 2 It is a schematic diagram of the working state structure of the impeller in the volute of the aluminum liquid pump in the prior art;
[0020] Figure 3 It is a schematic diagram of the structure of an embodiment of the utility model;
[0021] Figure 4 This is a schematic diagram of the working state structure of an embodiment of the utility model;
[0022] Figure 5 The figure is a schematic diagram of the working state structure of the embodiment of the utility model in the volute of the aluminum liquid pump.
[0023] Reference numerals:
[0024] 1. Impeller body; 10. Drain port; 11. Closed shaft end;
[0025] 101, spiral groove; 1011, upper spiral groove; 1012, lower spiral groove; 102, reverse blade. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0027] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present invention.
[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
[0029] See attached Figure 3-5As shown, the self-guiding sealed impeller of the embodiment of the utility model includes an impeller body 1 for connecting to the output shaft of the aluminum liquid pump, the impeller body 1 is an internal cavity, and a plurality of drainage ports 10 penetrating the internal cavity of the impeller body 1 are provided on the side wall of the impeller body 1; the upper end of the impeller body 1 is a closed shaft end 11 for connecting to the output shaft of the aluminum liquid pump; the lower end of the impeller body 1 penetrates the internal cavity; and a plurality of reverse blades 102 are formed on the side walls at both ends of the impeller body 1.
[0030] In the embodiment of the utility model, a plurality of reverse blades 102 are formed by opening a plurality of spiral grooves 101 on the side walls at both ends of the impeller body 1. The plurality of spiral grooves 101 are arranged in the same direction of spirals, and the plurality of spiral grooves 101 are connected to the plurality of drainage ports 10.
[0031] In order to reduce the leakage of aluminum liquid, a plurality of reverse blades 102 distributed on the side walls at both ends of the impeller body 1 are symmetrically arranged; the spiral groove 101 on the upper end side wall of the impeller body 1 is an upper spiral groove 1011, and the spiral groove 101 on the lower end side wall of the impeller body 1 is a lower spiral groove 1012; the spiral direction of the upper spiral groove 1011 runs through from top to bottom; the spiral direction of the lower spiral groove 1012 runs through from bottom to top. When in use, the impeller body 1 is rotatably installed in the volute of the aluminum liquid pump, and the reverse blades 102 are respectively located at the sealing parts of the two ends of the impeller body 1 and the volute of the aluminum liquid pump.
[0032] In the embodiment of the utility model, in order to ensure the service life of the impeller body 1 and the reverse blades 102, the impeller body 1 and the reverse blades 102 are both made of graphite material.
[0033] In order to ensure that the impeller body 1 can rotate stably, the reverse blades 102 distributed at both ends of the impeller body 1 are arranged in a spiral with equal angles around the central axis of the impeller body 1.
[0034] The utility model embodiment has a self-guiding sealing impeller, and a reverse blade is added to the sealing part of the existing impeller and the volute of the aluminum liquid pump. The reverse blade is used to generate high-pressure and low-flow aluminum liquid to the middle discharge port of the impeller to offset the leaked aluminum liquid. The aluminum liquid passes through a plurality of spiral grooves to form internal and external self-guiding, thereby realizing liquid sealing between the impeller and the volute of the aluminum liquid pump, avoiding the leakage of aluminum liquid driven by the impeller, and improving the pressure and use efficiency of the impeller.
[0035] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.
Claims
1. A self-guiding sealed impeller, comprising an impeller body (1) for connecting to an output shaft of an aluminum liquid pump, wherein the impeller body (1) is an internal cavity, and a plurality of drainage ports (10) penetrating the internal cavity of the impeller body (1) are provided on a side wall of the impeller body (1); the upper end of the impeller body (1) is a closed shaft end (11) for connecting to the output shaft of the aluminum liquid pump; the lower end of the impeller body (1) penetrates the internal cavity; and is characterized in that: A plurality of reverse blades (102) are formed on the side walls at both ends of the impeller body (1).
2. The self-guiding sealed impeller according to claim 1, characterized in that: A plurality of reverse blades (102) are formed by providing a plurality of spiral grooves (101) on the side walls at both ends of the impeller body (1); the plurality of spiral grooves (101) are arranged in the form of spirals in the same direction; and the plurality of spiral grooves (101) are connected to the plurality of liquid discharge ports (10).
3. The self-guiding sealed impeller according to claim 1 or 2, characterized in that: The plurality of reverse blades (102) distributed on the side walls at both ends of the impeller body (1) are symmetrically arranged.
4. The self-guiding sealed impeller according to claim 2, characterized in that: The spiral groove (101) on the upper end side wall of the impeller body (1) is an upper spiral groove (1011), and the spiral groove (101) on the lower end side wall of the impeller body (1) is a lower spiral groove (1012); the upper spiral groove (1011) has a spiral direction that runs through from top to bottom; and the lower spiral groove (1012) has a spiral direction that runs through from bottom to top.
5. The self-guiding sealed impeller according to claim 4, characterized in that: The impeller body (1) is rotatably mounted in the volute of the aluminum liquid pump.
6. The self-guiding sealed impeller according to claim 5, characterized in that: The reverse blade (102) is located at the sealing position between the impeller body (1) and the volute of the aluminum liquid pump.
7. The self-guiding sealed impeller according to claim 6, characterized in that: The impeller body (1) and the reverse blades (102) are both made of graphite material.
8. The self-guiding sealed impeller according to claim 7, characterized in that: The reverse blades (102) distributed at both ends of the impeller body (1) are arranged in a spiral at equal angles around the central axis of the impeller body (1).