Strong self-suction air-liquid mixed transportation magnetic force driving centrifugal pump
By introducing a shrink sleeve and annular groove structure into the impeller casing design of the magnetic centrifugal pump, the negative pressure suction at the inlet is enhanced, the problem of insufficient self-priming force at the initial startup is solved, and a faster liquid inlet speed is achieved.
Patent Information
- Application Number
- CN202422914428.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The existing magnetic centrifugal pump has a small negative pressure at the inlet at the initial start-up, resulting in insufficient self-priming force and slow liquid inlet speed at the inlet.
A strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump was designed. By setting a shrinkage sleeve and annular groove structure at the first inlet of the impeller shell, the negative pressure suction force was enhanced, and the medium flow rate was increased by the closed liquid outlet channel and shrinkage sleeve, forming a stronger self-priming force.
A strong negative pressure suction is formed at the inlet, which improves the self-priming ability of the medium and increases the liquid inlet speed.
Smart Images
Figure CN223387548U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of magnetic centrifugal pumps, and more specifically to a strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump. Background Art
[0002] In the existing magnetic centrifugal pump, the centrifugal pump drives the medium from the inlet to the outlet through the internal rotating impeller. The impeller is located in the centrifugal chamber of the centrifugal pump. The air inside the centrifugal chamber is discharged to the outlet through the rotation of the impeller, thereby generating a negative pressure at the inlet to generate an attraction for the medium. The existing gap between the inner wall of the centrifugal chamber and the impeller is large. At the initial stage of starting the centrifugal pump, the negative pressure at the inlet is small, the self-priming force on the medium generated by the negative pressure is relatively small, and the speed of liquid entering the inlet is slow. Therefore, a technical solution is needed to solve the above problems. Utility Model Content
[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, to generate a strong self-priming force at the inlet, and to provide a strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The utility model discloses a strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump, comprising a casing, an impeller, and a motor. The impeller is rotatably mounted on the casing via a rotating shaft, and the motor can drive the impeller to rotate. The casing comprises an impeller shell and a fixed shell. The impeller shell is fixedly mounted to the fixed shell. A first cavity is formed inside the impeller shell and the fixed shell. The impeller is located in the first cavity. The impeller shell comprises a first inlet. The impeller comprises a base, blades, and a cover plate. A plurality of blades are provided, and the plurality of blades are annularly distributed between the base and the cover plate. A liquid outlet channel is formed between two adjacent blades. The cover plate is provided with a second inlet, and the second inlet is at least partially located in the first inlet. The first inlet is connected to the plurality of liquid outlet channels.
[0006] Furthermore, a first annular groove is provided at one end of the first inlet facing the impeller, the second inlet is located in the first annular groove, and the inner wall of the second inlet is flush with the inner wall of the first inlet.
[0007] Furthermore, the impeller housing includes a detachable shrink sleeve, which is installed in the first inlet. A step is provided at the end of the first inlet away from the impeller. The shrink sleeve is provided with a ring plate, which is fixedly installed on the step. The inner wall of the shrink sleeve is provided with a closing portion, and the inner diameter of the shrink sleeve gradually decreases from both ends to the closing portion.
[0008] Furthermore, the shrink sleeve is at least partially located in the second inlet.
[0009] Furthermore, the impeller housing includes a first outlet, the inner wall of the impeller housing is provided with a second annular groove, the second annular groove is connected to the first outlet, the second annular groove and the impeller form a liquid outlet annular cavity in the first cavity, the impeller is provided with multiple second outlets, the second outlet is connected to the liquid outlet channel and the liquid outlet annular cavity.
[0010] Furthermore, the base includes a base plate and a connecting column, the connecting column is conical in shape with a diameter gradually decreasing in the direction away from the base plate, the connecting column is connected to the rotating shaft through a flat key, the impeller includes an end cover, the end cover fixes the connecting column to the rotating shaft, and the end face of the end cover facing the second inlet is an arc surface.
[0011] Furthermore, a gap is provided between the fixed shell and the impeller, the fixed shell is provided with a first channel and a second channel, the shell includes a cover shell, the cover shell is fixedly installed on the fixed shell, a second cavity is formed between the cover shell and the fixed shell, the first channel and the second channel are both connected to the first cavity and the second cavity, and the second channel is closer to the rotating shaft than the first channel.
[0012] The beneficial effects of the utility model are:
[0013] The impeller of the utility model forms a plurality of closed liquid outlet channels through the cover plate and a plurality of fan blades. The second inlet of the impeller extends into the first inlet of the impeller shell, reducing the influence of the medium in the first cavity on the self-priming force of the first inlet. When the impeller rotates, the closed liquid outlet channel can form a strong negative pressure at the first inlet, so that the first inlet can have a stronger self-priming force. Through the shrinkage sleeve installed in the first inlet, the flow velocity of the medium when flowing through the closing part will increase, and the self-priming force of the medium will also increase. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of this embodiment.
[0015] Figure 2 This is a cross-sectional view of the casing and impeller in this embodiment.
[0016] Figure 3 Schematic diagram of the impeller in this embodiment.
[0017] Figure numerals: 1, casing; 11, impeller casing; 111, first inlet; 1111, step; 112, first outlet; 113, first annular groove; 114, second annular groove; 115, liquid outlet annular cavity; 12, fixed casing; 121, first channel; 122, second channel; 13, cover casing; 14, first cavity; 15, second cavity; 16, shrink sleeve; 161, closing part; 162, ring plate; 2, impeller; 21, base; 211, base plate; 212, connecting column; 22, fan blade; 221, liquid outlet channel; 23, cover plate; 231, second inlet; 232, second outlet; 24, end cover; 25, rotating shaft; 251, first magnetic block; 3, fixed cover; 31, transmission compartment; 4, motor; 41, transmission shaft; 42, magnetic frame; 43, second magnetic block. DETAILED DESCRIPTION
[0018] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0019] like Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment discloses a strong self-priming gas-liquid mixed magnetic drive centrifugal pump including a housing 1, an impeller 2, a fixed seat 3, and a motor 4. The impeller 2 is rotatably mounted on the housing 1 through a rotating shaft 25. The motor 4 can drive the impeller 2 to rotate. The motor 4 is provided with a transmission shaft 41. The fixed cover 3 is rotatably connected to the transmission shaft 41 through a bearing. The fixed cover 3 is in a fixed state. The transmission shaft 41 of the motor 4 extends into the fixed cover 3. The transmission shaft 41 can rotate. The transmission shaft 41 is installed with a magnetic frame 42. The fixed cover 3 and the housing 1 are installed inside to form a transmission compartment 31. The magnetic frame 42 Located in the transmission compartment 31, a cylindrical cavity is provided in the center of the magnetic frame 42, a second magnetic block 43 is installed on the inner side wall of the magnetic frame 42, the shell 1 is fixedly installed on the fixed cover 3, the impeller 2 is rotatably installed on the shell 1 through the rotating shaft 25, and the other end of the rotating shaft 25 extends into the interior of the magnetic frame 42. The rotating shaft 25 is installed with a first magnetic block 251, the first magnetic block 251 is located in the magnetic frame 42, corresponding to the second magnetic block 43 on the magnetic frame 42, the motor 4 drives the magnetic frame 42 to rotate and then drives the first magnetic block 251 and the rotating shaft 25 to rotate, so that the impeller 2 rotates, realizing the function of the centrifugal pump.
[0020] The housing 1 includes an impeller shell 11, a fixed shell 12, and a cover shell 13. The impeller shell 11 and the fixed shell 12 are fixedly installed. A first cavity 14 is formed inside the impeller shell 11 and the fixed shell 12. The impeller 2 is located in the first cavity 14. The cover shell 13 is fixedly installed on the fixed shell 12. A second cavity 15 is formed between the cover shell 13 and the fixed shell 12. A gap is provided between the fixed shell 12 and the impeller 2. The fixed shell 12 is provided with a first channel 121 and a second channel 122. The first channel 121 and the second channel 122 are both connected to the first cavity 1 4 and the second cavity 15. The second channel 122 is closer to the rotating shaft 25 than the first channel 121. The medium in the first cavity 14 can enter the second cavity 15 through the first channel 121. The medium in the second cavity 15 is subjected to the centrifugal pressure in the first cavity 14 and flows from the second cavity 15 to the first cavity 14 through the second channel 122. The first channel 121 and the second channel 122 can automatically balance the pressure on the inside and outside of the impeller 2 to prevent the outer side of the impeller 2 from being subjected to excessive pressure and causing friction with the fixed shell 12.
[0021] The impeller shell 11 includes a first inlet 111, the impeller 2 includes a base 21, blades 22, and a cover plate 23. The blades 22 are provided in a plurality, and the plurality of blades 22 are annularly distributed between the base 21 and the cover plate 23. A liquid outlet channel 221 is formed between two adjacent blades 22. The cover plate 23 is provided with a second inlet 231. The end of the first inlet 111 facing the impeller 2 is provided with a first annular groove 113. The second inlet 231 is at least partially located in the first inlet 111. The first inlet 111 is connected to the plurality of liquid outlet channels 221. When the impeller 2 When the wheel 2 rotates, the centrifugal force generated by the rotation discharges the air in each liquid outlet channel 221 outward to form a negative pressure at the second inlet 231. The semi-enclosed impeller 2 has better negative pressure concentration and can form a strong negative pressure at the second inlet 231. The second inlet 231 is located in the first annular groove 113, and the inner wall of the second inlet 231 is flush with the interior of the first inlet 111, reducing the influence of the medium in the first cavity 14 on the impeller 2 during rotation and enhancing the negative pressure suction generated at the first inlet 111.
[0022] The impeller shell 11 includes a detachable shrink sleeve 16, which is installed in the first inlet 111. The end of the first inlet 111 away from the impeller 2 is provided with a step 1111, and the shrink sleeve 16 is provided with a ring plate 162, which is fixedly installed on the step 1111. The inner wall of the shrink sleeve 16 is provided with a closing portion 161, and the inner diameter of the shrink sleeve 16 gradually decreases from both ends to the closing portion 161. When passing through the closing portion 161, the air flow velocity will increase due to the reduction in the cross-sectional area inside the shrink sleeve 16. At the same time, the air flow pressure will also increase, which can form a stronger self-priming force at the first inlet 111. More preferably, the shrink sleeve 16 is at least partially located in the second inlet 231, and the shrink sleeve 16 plays a certain sealing role on the gap between the first annular groove 113 and the second inlet 231, thereby reducing the influence of the medium in the first cavity 14 on the self-priming force generated by the impeller 2.
[0023] like Figure 2 As shown, the impeller shell 11 includes a first outlet 112, and the inner wall of the impeller shell 11 is provided with a second annular groove 114, which is connected to the first outlet 112. The second annular groove 114 and the impeller 2 form a liquid outlet annular cavity 115 in the first cavity 14. The impeller 2 is provided with multiple second outlets 232, and the second outlets 232 are connected to the liquid outlet channel 221 and the liquid outlet annular cavity 115. The medium entering the liquid outlet channel 221 from the second inlet 231 enters the liquid outlet annular cavity 115 from the second outlet 232. The medium in the liquid outlet annular cavity 115 is transmitted to the first outlet 112 by the centrifugal force of the impeller 2. The inner wall of the second annular groove 114 is an arc surface, which can better enable the medium to generate centrifugal vortex and be transported outward.
[0024] The base 21 includes a base plate 211 and a connecting column 212. The connecting column 212 is tapered with a diameter gradually decreasing in the direction away from the base plate 211. The tapered connecting column 212 can guide the medium entering the liquid outlet channel 221 from the second inlet 231 to flow to the second outlet 232. The connecting column 212 is connected to the rotating shaft 25 by a flat key. The impeller 2 includes an end cover 24. The end cover 24 fixes the connecting column 212 to the rotating shaft 25. The end surface of the end cover 24 facing the second inlet 231 is an arc surface. While playing a fixing role, the end cover 24 can also reduce the pressure of the medium on the impeller 2 when entering from the second inlet 231, reduce the connection impact on the bearing of the rotating shaft 25, and better divert the medium entering the second inlet 231 to multiple liquid outlet channels 221.
[0025] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.
Claims
1. A strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump, characterized in that: The invention comprises a housing (1), an impeller (2), and a motor (4); the impeller (2) is rotatably mounted on the housing (1) via a rotating shaft (25); the motor (4) can drive the impeller (2) to rotate; the housing (1) comprises an impeller shell (11) and a fixed shell (12); the impeller shell (11) and the fixed shell (12) are fixedly mounted; a first cavity (14) is formed inside the impeller shell (11) and the fixed shell (12); the impeller (2) is located in the first cavity (14); the impeller shell (11) comprises a first inlet (111), the impeller (2) comprises a base (21), blades (22), and a cover plate (23), wherein a plurality of blades (22) are provided, and the plurality of blades (22) are distributed in a ring shape between the base (21) and the cover plate (23), and a liquid outlet channel (221) is formed between two adjacent blades (22), and the cover plate (23) is provided with a second inlet (231), and the second inlet (231) is at least partially located in the first inlet (111), and the first inlet (111) is connected to the plurality of liquid outlet channels (221).
2. A strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump according to claim 1, characterized in that: A first annular groove (113) is provided at one end of the first inlet (111) facing the impeller (2), the second inlet (231) is located in the first annular groove (113), and the inner wall of the second inlet (231) is flush with the interior of the first inlet (111).
3. A strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump according to claim 1, characterized in that: The impeller housing (11) comprises a detachably mounted shrink sleeve (16), the shrink sleeve (16) being mounted in the first inlet (111), the first inlet (111) having a step (1111) provided at one end thereof away from the impeller (2), the shrink sleeve (16) being provided with a ring plate (162), the ring plate (162) being fixedly mounted on the step (1111), the inner wall of the shrink sleeve (16) being provided with a closing portion (161), and the inner diameter of the shrink sleeve (16) gradually decreasing from both ends toward the closing portion (161).
4. A strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump according to claim 3, characterized in that: The shrink sleeve (16) is at least partially located within the second inlet (231).
5. The strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump according to claim 1, characterized in that: The impeller shell (11) comprises a first outlet (112); the inner wall of the impeller shell (11) is provided with a second annular groove (114); the second annular groove (114) is connected to the first outlet (112); the second annular groove (114) and the impeller (2) form a liquid outlet annular cavity (115) in the first cavity (14); the impeller (2) is provided with a plurality of second outlets (232); the second outlets (232) are connected to the liquid outlet channel (221) and the liquid outlet annular cavity (115).
6. A strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump according to claim 1, characterized in that: The base (21) comprises a base plate (211) and a connecting column (212); the connecting column (212) is tapered with a diameter gradually decreasing in a direction away from the base plate (211); the connecting column (212) is connected to the rotating shaft (25) via a flat key; the impeller (2) comprises an end cover (24); the end cover (24) fixedly connects the connecting column (212) to the rotating shaft (25); and the end surface of the end cover (24) facing the second inlet (231) is an arc surface.
7. The strong self-priming gas-liquid mixed transmission magnetic drive centrifugal pump according to claim 1, characterized in that: A gap is provided between the fixed shell (12) and the impeller (2); the fixed shell (12) is provided with a first channel (121) and a second channel (122); the housing (1) comprises a cover shell (13); the cover shell (13) is fixedly mounted on the fixed shell (12); a second cavity (15) is formed between the cover shell (13) and the fixed shell (12); the first channel (121) and the second channel (122) are both connected to the first cavity (14) and the second cavity (15); and the second channel (122) is closer to the rotating shaft (25) than the first channel (121).