Ultralow-temperature magnetic drive centrifugal pump
By designing a vacuum chamber and annular groove structure in the magnetic centrifugal pump, the problem of temperature drop of the medium at ultra-low temperatures is solved, achieving medium insulation and stable impeller rotation, thus improving the medium transmission effect.
Patent Information
- Application Number
- CN202423148856.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-20
AI Technical Summary
When using existing magnetic centrifugal pumps to transfer cryogenic media, the media remains in the centrifuge chamber, causing the temperature to drop and the mass to decrease.
The design incorporates an outer casing, an inner casing, and a vacuum cavity between the casings to reduce heat absorption by the inner casing. The vacuum cavity isolates temperature conduction, and the design of the annular groove and the receiving groove reduces the contact area between the medium and the casing, thus stabilizing the impeller rotation.
It effectively reduces heat absorption by the medium, maintains the medium temperature, improves impeller rotation stability, and ensures medium quality.
Smart Images
Figure CN223578230U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of magnetic centrifugal pump, more particularly to a kind of super low temperature magnetic drive centrifugal pump. BACKGROUND
[0002] In prior art, the medium is driven from the inlet to the outlet by the impeller rotating inside the magnetic centrifugal pump, the impeller is located in the centrifugal cavity of the centrifugal pump, the air inside the centrifugal cavity is discharged to the outlet by the rotation of the impeller, and then the negative pressure is generated at the inlet to produce the attraction to the medium. When the existing magnetic centrifugal pump is applied to the transmission of some super low temperature medium, the medium will stay in the centrifugal cavity for a certain period of time. The medium contacting the shell of the centrifugal pump will absorb heat, causing the temperature of the medium to drop. The quality of the medium will decrease when the temperature of the medium increases. Therefore, a technical solution is needed to solve the above problems. SUMMARY
[0003] The utility model aims at overcoming the deficiency of prior art, reducing the heat absorption of medium in the centrifugal pump, and providing a kind of super low temperature magnetic drive centrifugal pump.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] The utility model discloses a kind of super low temperature magnetic drive centrifugal pumps, including shell, inner shell, outer shell, impeller, shaft, the shaft is rotatably installed in the shell, the impeller is installed in the shaft, the inner shell is installed in the shell, the inner shell and the shell form centrifugal cavity between the shell, the impeller is located in the centrifugal cavity, the outer shell is installed in the shell, the outer shell is located at the outer side of the inner shell, the outer shell, the inner shell, the shell form vacuum cavity between the shell, the inner shell is equipped with first connecting pipe, the outer shell is equipped with second connecting pipe, the first connecting pipe is located in the inner side of the second connecting pipe, the first connecting pipe and the second connecting pipe are fixedly connected to form inlet, the inlet is communicated with the centrifugal cavity.
[0006] Further, the shell includes first connecting ring, second connecting ring, the second connecting ring is located at the outer side of the first connecting ring and is spaced apart, the first connecting ring is equipped with first plug-in part, the inner shell is equipped with third plug-in part corresponding to the first plug-in part, the second connecting ring is equipped with second plug-in part, and the outer shell is equipped with fifth plug-in part corresponding to the second plug-in part.
[0007] Further, the first connecting pipe is equipped with fourth plug-in part, the second connecting pipe is equipped with sixth plug-in part corresponding to the fourth plug-in part, and the fourth plug-in part and the sixth plug-in part are sealingly plugged.
[0008] Further, the liquid outlet pipe is fixedly connected to one end of the inner cover shell, and the other end of the liquid outlet pipe penetrates the outer cover shell.
[0009] Further, the outer cover shell is provided with an air outlet, and the air outlet is communicated with the vacuum cavity.
[0010] Further, the impeller comprises a ring plate, a plurality of fan blades, and a plurality of inner rotating vanes, the plurality of fan blades are located on the end surface of the impeller facing the inlet, the ring plate extends towards the end surface of the impeller away from the inlet, the plurality of inner rotating vanes are located on the end surface of the impeller away from the inlet, and the ring plate surrounds an inner groove, and the plurality of inner rotating vanes are located in the inner groove.
[0011] Further, the shell is provided with a containing groove, and the ring plate is located in the containing groove.
[0012] Further, the side wall of the inner cover shell is provided with a ring groove, and the liquid outlet pipe is communicated with the ring groove.
[0013] The utility model discloses the beneficial effects are:
[0014] 1. The utility model discloses a vacuum cavity is formed between outer cover shell, inner cover shell and shell, the contact part between inner cover shell and outer cover shell reduces, the vacuum cavity can isolate the temperature conduction medium between inner cover shell and outer cover shell, reduces the heat absorption of inner cover shell, reduces the heat absorption of medium in centrifugal cavity, can keep warm the medium in centrifugal cavity.
[0015] 2. The containing groove of shell can accommodate the ring plate of impeller, reduces the medium access between impeller and shell, makes the rotation of impeller more stable, can reduce the contact area of medium and shell in centrifugal cavity simultaneously, and reduces the heat absorption of medium. DRAWINGS
[0016] Figure 1 It is a sectional view of the embodiment.
[0017] Figure 2 It is Figure 1 It is an enlarged view of A in the middle.
[0018] Figure 3 It is a sectional view of the liquid outlet pipe part in the embodiment.
[0019] Figure 4 It is a schematic view of the impeller in the embodiment.
[0020] Fig. 1 is a shell; 11 is a first connecting ring; 111 is a first plug-in part; 12 is a second connecting ring; 121 is a second plug-in part; 13 is a containing groove; 2 is an inner cover; 21 is a third plug-in part; 211 is a vacuum cavity; 212 is a centrifugal cavity; 213 is an inlet; 22 is a first connecting pipe; 221 is a fourth plug-in part; 23 is a ring groove; 3 is an outer cover; 31 is a fifth plug-in part; 32 is a second connecting pipe; 321 is a sixth plug-in part; 33 is a suction port; 34 is a sealing element; 4 is an impeller; 41 is a ring plate; 411 is an inner groove; 42 is a fan blade; 43 is an inner rotary vane; 5 is a rotating shaft; 51 is an inner magnetic block; 6 is a liquid outlet pipe; 7 is a motor; 71 is a connecting shaft; 72 is a magnetic force frame; 73 is an outer magnetic block; 8 is a fixed shell; 81 is a magnetic force cavity. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.
[0022] As shown in Figure 1 , Figure 2 , the present embodiment discloses an ultralow-temperature magnetic force driven centrifugal pump, comprising a shell 1, an inner cover 2, an outer cover 3, an impeller 4, a rotating shaft 5, and a liquid outlet pipe 6. The rotating shaft 5 is rotatably installed in the shell 1, the impeller 4 is installed on the rotating shaft 5, the inner cover 2 is installed in the shell 1, a centrifugal cavity 212 is formed between the inner cover 2 and the shell 1, the impeller 4 is located in the centrifugal cavity 212, the shell 1 comprises a first connecting ring 11 and a second connecting ring 12, the second connecting ring 12 is located outside the first connecting ring 11 and is spaced apart, the first connecting ring 11 is located on an end face of the shell 1 extending towards the inner cover 2, the first connecting ring 11 is provided with a first plug-in part 111, the first plug-in part 111 is located at one end of the first connecting ring 11 facing the inner cover 2, the inner cover 2 is provided with a third plug-in part 21 corresponding to the first plug-in part 111, the first plug-in part 111 and the third plug-in part 21 are mutually plugged to form a stop, and the first plug-in part 111 and the third plug-in part 21 are sealed by a sealing ring.
[0023] The outer cover 3 is mounted on the shell 1, and the second connecting ring 12 is located on the end face of the shell 1 extending towards the outer cover 3. The second connecting ring 12 is provided with a second plug-in part 121 located at one end of the second connecting ring 12 towards the outer cover 3. The outer cover 3 is provided with a fifth plug-in part 31 corresponding to the second plug-in part 121. The second plug-in part 121 and the fifth plug-in part 31 are plugged into each other to form a stop. The second plug-in part 121 and the fifth plug-in part 31 are sealed by a sealing ring. The outer cover 3 is located outside the inner cover 2, and the outer cover 3 covers the outside of the inner cover 2.
[0024] The inner cover 2 is provided with a first connecting pipe 22, and the outer cover 3 is provided with a second connecting pipe 32. The first connecting pipe 22 is located inside the second connecting pipe 32. The first connecting pipe 22 is provided with a fourth plug-in part 221, and the second connecting pipe 32 is provided with a sixth plug-in part 321 corresponding to the fourth plug-in part 221. The fourth plug-in part 221 and the sixth plug-in part 321 are sealed and plugged. The outer cover 3, the inner cover 2, and the shell 1 form a vacuum cavity 211. The contact between the inner cover 2 and the outer cover 3 is reduced. The vacuum cavity 211 can isolate the temperature conduction medium between the inner cover 2 and the outer cover 3, reduce the heat absorption of the inner cover 2, and reduce the heat absorption of the medium in the centrifugal cavity 212.
[0025] The first connecting pipe 22 and the second connecting pipe 32 are fixedly connected to form an inlet 213. The inner side walls of the first connecting pipe 22 and the second connecting pipe 32 are flush. The inlet 213 communicates with the centrifugal cavity 212, and the medium can be sucked from the inlet 213 by the negative pressure formed by the rotation of the impeller 4.
[0026] As shown in Figure 3 , one end of the liquid outlet pipe 6 is fixedly connected to the inner side of the inner cover 2. The liquid outlet pipe 6 is sealingly connected to the inner cover 2. The other end of the liquid outlet pipe 6 penetrates the outer cover 3. The outer cover 3 is provided with a sealing member 34. The sealing member 34 seals the liquid outlet pipe 6 and the outer cover 3 to prevent external space from entering the vacuum cavity 211. The liquid outlet pipe 6 communicates with the centrifugal cavity 212. The medium in the centrifugal cavity 212 is sent out from the liquid outlet pipe 6 by the centrifugal force generated by the rotation of the impeller 4. The side wall of the inner cover 2 is provided with a ring groove 23. The ring groove 23 can better generate spiral vortex of the medium. The liquid outlet pipe 6 communicates with the ring groove 23 to make the output force of the medium stronger.
[0027] The outer cover 3 is provided with an air outlet 33. The air outlet 33 communicates with the vacuum cavity 211. The vacuum cavity 211 evacuates the air inside through the air outlet 33 to make the air pressure in the vacuum cavity 211 close to a vacuum state. The heat radiation transmission in the vacuum cavity 211 is reduced, the heat absorption of the inner cover 2 is reduced, and the heat absorption of the medium in the centrifugal cavity 212 is prevented.
[0028] As shown in Figure 4As shown, the impeller 4 includes a ring plate 41, a plurality of blades 42, a plurality of inner vanes 43, the plurality of blades 42 are located at the end of the impeller 4 towards the inlet 213, the ring plate 41 extends towards the direction of the impeller 4 away from the inlet 213, the plurality of inner vanes 43 are located at the end of the impeller 4 away from the inlet 213, the ring plate 41 forms an inner groove 411, the plurality of inner vanes 43 are located in the inner groove 411, when the centrifugal cavity 212 is full of medium and the impeller 4 rotates, the inner vanes 43 can generate a force away from the shell 1, and can counteract the force of the blades 42 to make the impeller 4 close to the shell 1, thereby reducing the pressure of the medium received by the impeller 4, and making the impeller 4 operate more stably.
[0029] More preferably, the shell 1 is provided with a containing groove 13, the containing groove 13 is located at the end of the shell 1 towards the impeller 4, the ring plate 41 is located in the containing groove 13, thereby reducing the medium entering between the impeller 4 and the shell 1, making the impeller 4 rotate more stably, and at the same time, the contact area of the medium in the centrifugal cavity 212 with the shell 1 can be reduced, the heat absorption of the medium can be reduced, and the outer periphery of the blades 42 can correspond to the ring groove 23, so that the medium can generate a spiral vortex better.
[0030] The rotating shaft 5 of the embodiment is driven by the motor 7, the motor 7 is provided with a connecting shaft 71, the fixed shell 8 is rotatably connected with the connecting shaft 71 through bearing mounting, the fixed shell 8 is in a fixed state, the connecting shaft 71 of the motor 7 extends into the fixed shell 8, the connecting shaft 71 can rotate, the connecting shaft 71 is mounted with a magnetic frame 72, the fixed shell 8 and the shell 1 are mounted to form a magnetic cavity 81 inside, the magnetic frame 72 is located in the magnetic cavity 81, the magnetic frame 72 is provided with a cylindrical cavity in the center, the inner side wall of the magnetic frame 72 is mounted with an outer magnetic block 73, the shell 1 is fixedly mounted on the fixed shell 8, the other end of the rotating shaft 5 extends into the inside of the magnetic frame 72, the rotating shaft 5 is mounted with an inner magnetic block 51, the inner magnetic block 51 is located in the magnetic frame 72 and corresponds to the outer magnetic block 73 on the magnetic frame 72, the motor 7 drives the magnetic frame 72 to rotate, and then drives the inner magnetic block 51 and the rotating shaft 5 to rotate, so that the impeller 4 rotates, and the function of the magnetic drive centrifugal pump is realized.
[0031] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not limited to the above-mentioned embodiments only, any technical scheme belonging to the utility model idea is within the protection scope of the utility model. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.
Claims
1. An ultra-low temperature magnetic drive centrifugal pump characterized by, The utility model provides a kind of centrifugal vacuum pump, including shell (1), inner cover (2), outer cover (3), impeller (4), rotating shaft (5), the rotating shaft (5) rotation is installed in the shell (1), the impeller (4) is installed in the rotating shaft (5), the inner cover (2) is installed in the shell (1), the inner cover (2) with the shell (1) between forming centrifugal cavity (212), the impeller (4) is located in the centrifugal cavity (212), the outer cover (3) is installed in the shell (1), the outer cover (3) is located in the outer side of the inner cover (2), the outer cover (3), the inner cover (2), the shell (1) between forming vacuum cavity (211), the inner cover (2) is equipped with first connecting pipe (22), the outer cover (3) is equipped with second connecting pipe (32), the first connecting pipe (22) is located in the second connecting pipe (32) inside, the first connecting pipe (22) with the second connecting pipe (32) fixed connection forms import (213), the import (213) is communicated centrifugal cavity (212).
2. The ultra-low temperature magnetic drive centrifugal pump of claim 1, wherein, The shell (1) includes first connecting ring (11), second connecting ring (12), the second connecting ring (12) is located in the outer side of the first connecting ring (11) and is spaced apart, the first connecting ring (11) is equipped with first plug-in part (111), the inner cover (2) is equipped with the third plug-in part (21) corresponding with the first plug-in part (111), the second connecting ring (12) is equipped with second plug-in part (121), the outer cover (3) is equipped with the fifth plug-in part (31) corresponding with the second plug-in part (121).
3. The ultra-low temperature magnetic drive centrifugal pump of claim 1, wherein, The first connecting pipe (22) is equipped with fourth plug-in part (221), the second connecting pipe (32) is equipped with the sixth plug-in part (321) corresponding with the fourth plug-in part (221), the fourth plug-in part (221) is sealed with the sixth plug-in part (321) plug-in.
4. The ultra-low temperature magnetic drive centrifugal pump of claim 1, wherein, Including liquid outlet pipe (6), one end of the liquid outlet pipe (6) is fixedly connected the inner side of the inner cover (2), the other end of the liquid outlet pipe (6) penetrates the outer cover (3), the outer cover (3) is installed sealing element (34), the sealing element (34) seals between the liquid outlet pipe (6) and the outer cover (3), the liquid outlet pipe (6) is communicated centrifugal cavity (212).
5. The ultra-low temperature magnetic drive centrifugal pump of claim 1, wherein, The outer cover (3) is equipped with air outlet (33), the air outlet (33) is communicated vacuum cavity (211).
6. The ultra-low temperature magnetic drive centrifugal pump of claim 1, wherein, The impeller (4) includes ring plate (41), a plurality of fan blades (42), a plurality of inner rotating blades (43), a plurality of the fan blades (42) are located in the end face of the impeller (4) towards the import (213), the ring plate (41) extends towards the direction of the impeller (4) away from the import (213), a plurality of the inner rotating blades (43) are located in the end face of the impeller (4) away from the import (213), the area surrounded by the ring plate (41) forms inner groove (411), a plurality of the inner rotating blades (43) are located in the inner groove (411).
7. The ultra-low temperature magnetic drive centrifugal pump of claim 6, wherein, The shell (1) is provided with a containing groove (13) located at an end face of the shell (1) facing the impeller (4), and the ring plate (41) is located in the containing groove (13).
8. The ultra-low temperature magnetic drive centrifugal pump of claim 4, wherein, The side wall of the inner cover (2) is provided with a ring groove (23), and the liquid outlet pipe (6) communicates with the ring groove (23).