Ceramic pump with impeller anti-falling structure

Abstract

The invention relates to the technical field of centrifugal pumps, and discloses a ceramic pump with an impeller anti-falling structure, which comprises a base, a support seat I arranged at the top of the base, a pump shell connected with the support seat I, a pump cover connected with the pump shell, and an impeller arranged on the pump shell, a limiting mechanism is arranged on the outer side wall of the rotating shaft and comprises a box body, a rotating shaft, a rotating shaft and a rotating shaft, and the box body is arranged on the outer side wall of the rotating shaft; the second ring body is arranged on one side of the impeller; the friction part is rotationally connected to the rotating shaft; and the two ends of the elastic part are fixed to the friction part and the box body correspondingly, when the rotating shaft drives the impeller to rotate anticlockwise, under the action of centrifugal force, the friction part will be attached to and tightly press the inner side wall of the second ring body, and the action enables the impeller and the rotating shaft to be locked mutually.

Description

Technical Field

[0001] This invention relates to the technical field of centrifugal pumps, specifically to a ceramic pump with an impeller anti-detachment structure. Background Technology

[0002] Ceramic pumps are a new type of industrial pump that uses high-strength engineering ceramics (such as zirconium oxide and alumina) as the core material for its flow-through components. Compared to traditional metal pumps, ceramic pumps exhibit superior performance advantages due to the excellent properties of the material itself. Key components such as the pump body and impeller possess extremely high hardness, wear resistance, and corrosion resistance, enabling them to handle harsh conditions such as conveying materials containing solid particles, high-concentration slurries, or strong acids and alkalis, significantly extending equipment lifespan and reducing maintenance frequency. The smooth surface and low coefficient of friction of ceramic materials help reduce flow resistance and improve conveying efficiency to a certain extent. In summary, ceramic pumps, with their durability, stability, and wide adaptability, have become a key technological equipment replacing traditional pumps in many wear-resistant and corrosion-resistant applications.

[0003] During the actual operation of centrifugal pumps, impeller components occasionally detach. This malfunction not only directly interrupts the normal operation of the pump unit but can also potentially lead to serious equipment accidents. The core reason for impeller detachment is the rapid reverse rotation of the impeller. This reverse rotation generates a huge reverse torque, causing the impeller cap that secures the impeller to gradually loosen and eventually detach. Impeller reverse rotation mainly stems from two typical operating conditions: First, in a pumping system, if a check valve is not installed in the pipeline, the liquid accumulated in the vertical pipe at the moment the pump stops will rapidly flow backward under gravity, and the resulting huge impact force will drive the impeller to reverse at high speed; Second, after motor maintenance or replacement, wiring errors may cause the motor to rotate in the opposite direction to the pump's rated rotation, thus causing the impeller to reverse. To address this, a ceramic pump with an impeller anti-detachment structure has been proposed. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a ceramic pump with an impeller anti-detachment structure, which effectively prevents the impeller from detaching under reverse operation conditions, avoiding pump operation interruptions and potential serious equipment accidents caused by impeller detachment. This solves the problem in existing technologies where impeller detachment caused by reverse operation is frequent, posing a significant threat to the normal operation of the pump.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a ceramic pump with an impeller anti-detachment structure, comprising a base, a support seat 1 disposed on the top of the base, a pump casing connected to the support seat 1, a pump cover connected to the pump casing, and an impeller disposed on the pump casing. A rotating shaft is threaded onto the impeller, and a limiting mechanism is provided on the outer wall of the rotating shaft. The limiting mechanism includes: a housing disposed on the outer wall of the rotating shaft; a ring body 2 disposed on one side of the impeller; a friction part rotatably connected to the rotating shaft; and an elastic part, with its two ends fixed to the friction part and the housing respectively. When the rotating shaft drives the impeller to rotate counterclockwise, under the action of centrifugal force, the friction part will adhere to and press against the inner wall of the ring body 2, thereby locking the impeller and the rotating shaft together.

[0008] Furthermore, at least two friction parts are provided, and the two friction parts are distributed in an axial array inside the housing.

[0009] Furthermore, one side of the friction part is an arc-shaped surface near the inner wall of the second ring, and the inner wall of the second ring is provided with a groove that matches the friction part.

[0010] Furthermore, the elastic part is a spring or a sheet spring.

[0011] Furthermore, the shaft is equipped with a transmission mechanism. When pressurized liquid is introduced into the pump housing, the liquid pressure will drive the transmission mechanism to operate, causing it to squeeze the friction part. The friction part then adheres to and presses against the inner wall of the second ring, thereby locking the impeller and the shaft together.

[0012] Furthermore, the transmission mechanism includes:

[0013] A connecting rod is slidably connected to the inside of the rotating shaft via a bracket, and a cover is fixed to one end of the connecting rod;

[0014] Track 2, which is fixed to the outer side wall of the connecting rod;

[0015] Rod body two is slidably connected to the rotating shaft.

[0016] Furthermore, a second spring is sleeved on the outer side of the second rod, one end of the second spring is fixed to the inner side wall of the rotating shaft, and the other end is fixed to the second rod.

[0017] Furthermore, a fixing mechanism is provided on the top of the base. When it is necessary to fix the rotating shaft, the cover can be removed and a special tool can be used to press the connecting rod to a specified depth. This operation will drive the fixing mechanism to work, thereby achieving reliable mechanical fixation of the rotating shaft.

[0018] Furthermore, the fixing mechanism includes: a second support base, which is fixed to the top of the base; a ring body, which is fixed to the inner wall of the second support base, and the inner wall of the ring body has multiple grooves; a rod body, which slides on the rotating shaft, and a spring body is sleeved on the outer side of the rod body, one end of the spring body being fixed to the rotating shaft and the other end being fixed to the rod body, and a track body is provided on one side of the connecting rod to cooperate with the rod body.

[0019] Furthermore, a motor and a coupling are provided on the top of the base. The motor is connected to the rotating shaft through the coupling. A bearing housing is provided on the outer side wall of the rotating shaft, and the bearing housing is fixed to the support base.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention provides a ceramic pump with an impeller anti-detachment structure, which has the following beneficial effects:

[0022] 1. This ceramic pump with an impeller anti-detachment structure, when the impeller rotates counterclockwise, causes friction between the friction part and the inner wall of the ring body under centrifugal force, keeping the impeller fixed to the shaft. The faster the impeller rotates counterclockwise, the greater the centrifugal force on the friction part, and the tighter the contact with the inner wall of the ring body, resulting in a more significant anti-detachment effect and effectively preventing the impeller from falling off due to reverse rotation. Simultaneously, when the impeller rotates clockwise normally, this anti-detachment structure does not obstruct its normal operation, ensuring the working efficiency of the ceramic pump.

[0023] 2. This ceramic pump with an impeller anti-detachment structure, when pressurized liquid is introduced into the pump casing, the liquid pressure drives the transmission mechanism to operate, further squeezing the friction part, so that the impeller and the shaft enter a more reliable interlocking state, enhancing the stability of the impeller under complex working conditions. At the same time, during the forward rotation of the impeller, the liquid pressure also drives the transmission mechanism to operate, further squeezing the friction part, making the connection between the impeller and the shaft more stable, and preventing loosening due to minor vibrations or impacts during normal operation, further ensuring the stability and reliability of the ceramic pump.

[0024] 3. This ceramic pump with an impeller anti-detachment structure has a fixing mechanism that allows for reliable mechanical fixation of the shaft when the impeller is disassembled. This provides double protection for the operation of the entire ceramic pump, greatly improving the safety and reliability of the equipment. It reduces the interruption of the pump's operation due to impeller detachment and the potential serious equipment accidents, while also reducing maintenance costs and downtime. This results in significant economic and social benefits. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the disassembled structure of the pump cover and impeller in this invention. Figure 1 ;

[0028] Figure 4 This is a schematic diagram of the disassembled structure of the pump cover and impeller in this invention. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the disassembled structure of the pump cover and impeller in this invention. Figure 3 ;

[0030] Figure 6 This is a schematic diagram of the connection between the limiting mechanism and the transmission mechanism in this invention;

[0031] Figure 7 This is a schematic diagram of the fixing mechanism in the present invention. Figure 1 ;

[0032] Figure 8 This is a schematic diagram of the fixing mechanism in the present invention. Figure 2 .

[0033] In the picture:

[0034] 100. Base; 110. Motor; 120. Coupling; 130. Bearing housing; 140. Support base one; 150. Shaft; 160. Pump casing; 170. Pump cover; 180. Impeller;

[0035] 200. Fixing mechanism; 210. Support base two; 220. Ring body one; 230. Groove; 240. Rod body one; 250. Track one; 260. Spring one;

[0036] 300. Limiting mechanism; 310. Ring body II; 320. Cover; 330. Friction part; 340. Elastic part; 350. Box body;

[0037] 400. Transmission mechanism; 410. Connecting rod; 420. Track II; 430. Spring II; 440. Rod II. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] During the actual operation of centrifugal pumps, impeller components may occasionally detach. This malfunction not only directly interrupts the normal operation of the pump unit but may also lead to serious equipment accidents. The core reason for impeller detachment is the rapid reverse rotation of the impeller. This reverse rotation generates a huge reverse torque, causing the impeller cap that secures the impeller to gradually loosen and eventually detach. Impeller reverse rotation mainly stems from two typical operating conditions: First, in a pumping system, if a check valve is not installed in the pipeline, the liquid accumulated in the vertical pipe at the moment the pump stops will rapidly flow backward under gravity, and the resulting huge impact force will drive the impeller to reverse at high speed; Second, after motor maintenance or replacement, wiring errors may cause the motor to rotate in the opposite direction to the pump's rated rotation, thus causing the impeller to reverse. To address this issue, a ceramic pump with an impeller anti-detachment structure is proposed. When the impeller 180 rotates counterclockwise, under the action of centrifugal force, the friction part 330 rubs against the inner wall of the second ring 310, keeping the impeller 180 fixed to the shaft 150. The faster the impeller 180 rotates counterclockwise, the greater the centrifugal force on the friction part 330, and the tighter the contact with the inner wall of the second ring 310, resulting in a more significant anti-detachment effect and effectively preventing the impeller 180 from detaching due to reverse rotation. Simultaneously, when the impeller 180 rotates normally clockwise, this anti-detachment structure does not obstruct its normal operation, ensuring the working efficiency of the ceramic pump.

[0040] As attached Figure 1-8As shown, this embodiment provides a ceramic pump with an impeller anti-detachment structure, including a base 100, a support seat 140 disposed on the top of the base 100, a pump casing 160 connected to the support seat 140, a pump cover 170 connected to the pump casing 160, and an impeller 180 disposed on the pump casing 160. A rotating shaft 150 is threadedly connected to the impeller 180, and a limiting mechanism 300 is provided on the outer side wall of the rotating shaft 150. Under the action of counterclockwise centrifugal force of the rotating shaft 150, the limiting mechanism 300 frictionally adheres to the impeller 180, restricting the impeller 180 on the rotating shaft 150 and preventing the impeller 180 from detaching. A motor 110 and a coupling 120 are disposed on the top of the base 100. The motor 110 is connected to the rotating shaft 150 through the coupling 120. A bearing housing 130 is disposed on the outer side wall of the rotating shaft 150, and the bearing housing 130 is fixed to the support seat 140.

[0041] Specifically, ceramic pumps are a new type of industrial pump that uses high-strength engineering ceramics (such as zirconium oxide and alumina) as the core material for its flow-through components. Compared to traditional metal pumps, ceramic pumps exhibit superior performance advantages due to the excellent properties of the material itself. Their pump bodies, impellers, and other key components possess extremely high hardness, wear resistance, and corrosion resistance, enabling them to handle harsh conditions such as conveying materials containing solid particles, high-concentration slurries, or strong acids and alkalis, significantly extending equipment lifespan and reducing maintenance frequency. The smooth surface and low coefficient of friction of ceramic materials help reduce flow resistance and improve conveying efficiency to a certain extent. In summary, ceramic pumps, with their durability, stability, and wide adaptability, have become a key technological equipment replacing traditional pumps in many wear-resistant and corrosion-resistant applications. (This is existing technology and will not be elaborated further here.)

[0042] As attached Figure 3-6 As shown, the limiting mechanism 300 includes: a housing 350, a second ring 310, and an elastic part 340. The housing 350 is disposed on the outer wall of the rotating shaft 150; the housing 350 has a cylindrical structure. The second ring 310 is disposed on one side of the impeller 180; a friction part 330 is rotatably connected to the rotating shaft 150; the two ends of the elastic part 340 are fixed to the friction part 330 and the housing 350, respectively. A sealing ring is provided between the second ring 310 and the housing 350. When the impeller 180 rotates counterclockwise, under the action of centrifugal force, the friction part 330 will adhere to and press against the inner wall of the second ring 310. This action locks the impeller 180 and the rotating shaft 150 together. This locking mechanism can effectively prevent the impeller from axially shifting or falling off due to centrifugal force during high-speed rotation, thereby ensuring the stability and safety of the ceramic pump operation. Even during long-term continuous operation or when facing complex and changing working conditions, the impeller 180 and the shaft 150 can maintain a tight connection, avoiding equipment failure and safety accidents caused by the impeller 180 falling off, and greatly improving the reliability and service life of the ceramic pump.

[0043] As attached Figure 6 As shown, at least two friction parts 330 are provided, and the two friction parts 330 are distributed in an axial array inside the housing 350.

[0044] Specifically, the arrangement of multiple friction parts 330 allows for a more even and effective distribution of force onto the inner wall of the second annular body 310 when the impeller 180 rotates counterclockwise, enhancing the locking effect. This design not only further improves the connection stability between the impeller 180 and the shaft 150, but also ensures that even if some friction parts 330 wear or fail, the remaining friction parts 330 can continue to function, maintaining the normal operation of the locking mechanism, thereby further improving the overall stability and durability of the ceramic pump.

[0045] As attached Figure 6 As shown, one side of the friction part 330 near the inner wall of the second ring 310 is an arc-shaped surface, and the inner wall of the second ring 310 has a groove for engaging the friction part 330. The elastic part 340 is a spring or a spring sheet. The spring sheet is not shown in the attached drawings.

[0046] Specifically, the grooves, not shown in the attached drawings, are arc-shaped, and multiple grooves are provided. This design, where the arc-shaped surface and the grooves work together, allows for a tighter and more snug contact between the friction part 330 and the second ring 310, further enhancing the friction and locking effect between them. When the impeller 180 rotates, the arc-shaped surface can better adapt to the shape of the inner wall of the second ring 310, reducing stress concentration and wear, thereby extending its service life. Simultaneously, the elastic part 340, using a spring or sheet design, provides stable elastic support for the friction part 330, ensuring that the friction part 330 maintains effective contact with the second ring 310 under various operating conditions, further improving the stability and reliability of the ceramic pump.

[0047] As attached Figure 3-6 As shown, a transmission mechanism 400 is provided inside the rotating shaft 150. When pressurized liquid is introduced into the pump housing 160, the liquid pressure will drive the transmission mechanism 400 to operate, causing it to squeeze the friction part 330. The friction part 330 then adheres to and presses against the inner side wall of the ring body 310, thereby causing the impeller 180 and the rotating shaft 150 to enter a mutually locked state.

[0048] Specifically, by using liquid pressure as a power source, no additional mechanical or electrical control devices are required, simplifying the structure and reducing costs. Under the action of liquid pressure, the transmission mechanism 400 can respond quickly, ensuring that the friction part 330 timely and accurately adheres to the inner wall of the annular body 310, achieving rapid locking between the impeller 180 and the shaft 150. This locking mechanism not only improves the stability of the ceramic pump during operation but also effectively prevents the impeller 180 from detaching from the shaft 150 due to centrifugal force when rotating counterclockwise at high speed, thus ensuring the safe operation of the ceramic pump.

[0049] As attached Figure 6 As shown, the transmission mechanism 400 includes a connecting rod 410, a second track 420, and a second rod 440. The connecting rod 410 is slidably connected to the interior of the rotating shaft 150 via a bracket. The bracket mainly consists of a bearing seat and multiple rods, which connect the bearing seat and the rotating shaft 150. The bracket is not shown in the attached drawing. One end of the connecting rod 410 is fixed with a cover 320. The second track 420 is fixed to the outer wall of the connecting rod 410. The second rod 440 is slidably connected to the rotating shaft 150. The second track 420 has an inclined surface, and the bottom end of the second rod 440 also has an inclined surface that matches the second track 420.

[0050] Specifically, when pressurized liquid enters and drives the transmission mechanism 400, the connecting rod 410 slides along the second track 420. Because the second track 420 and the inclined surface at the bottom of the second rod 440 are designed to fit together, the second rod 440 will displace inward during sliding, thereby pushing the friction part 330 against the inner wall of the second ring 310. This not only ensures the smoothness of the transmission process but also makes the fit between the friction part 330 and the second ring 310 tighter, further strengthening the locking effect between the impeller 180 and the rotating shaft 150.

[0051] As attached Figure 6 As shown, a spring 430 is sleeved on the outer side of the rod 440. One end of the spring 430 is fixed to the inner wall of the rotating shaft 150, and the other end is fixed to the rod 440. When the transmission process ends or the initial state needs to be restored, the spring 430 can push the rod 440 to reset by its own elastic force, so that the entire transmission mechanism 400 returns to the initial position, which facilitates the next normal operation and effectively improves the reliability and stability of the ceramic pump.

[0052] As attached Figure 1-8As shown, a fixing mechanism 200 is provided on the top of the base 100. When it is necessary to fix the rotating shaft 150, the cover 320 can be removed, and a special tool can be used to press the connecting rod 410 to a specified depth. This operation will drive the fixing mechanism 200 to work, thereby achieving reliable mechanical fixation of the rotating shaft 150. The fixing mechanism 200 includes a second support base 210, a first ring body 220, and a first rod body 240. The second support base 210 is fixed on the top of the base 100; the first ring body 220 is fixed to the inner side wall of the second support base 210, and the inner side wall of the first ring body 220 has multiple grooves 230; the first rod body 240 slides on the rotating shaft 150, and a spring 260 is sleeved on the outer side of the first rod body 240. One end of the spring 260 is fixed to the rotating shaft 150, and the other end is fixed to the first rod body 240. A track 250 that cooperates with the first rod body 240 is provided on one side of the connecting rod 410.

[0053] Specifically, when it is necessary to disassemble the impeller 180, firstly, the cover 320 is removed from the connecting rod 410. The two can be fixed together by means of insertion, thread, bolts, etc. After disassembly, using a rotating tool, such as a puller (which mainly consists of a clamp and a screw), the outer wall of the impeller 180 is clamped by the clamp, and the connecting rod 410 is pressed by the screw. After being pressed to a certain depth, the second rod 440 moves to the end of the second track 420, causing the second rod 440 to undergo a process of first rising and then lowering. At this time, the first rod 240 moves to the highest point of the first track 250, and the first rod 240 is inserted into the groove 230, thereby fixing the rotating shaft 150 on the ring 220. The markings for the groove 230 on the impeller 180 and the pump cover 170 are not shown in the attached drawings, which ensures that the first rod 240 is inserted into the groove 230 during fixing. Finally, rotating the puller will rotate the impeller 180, separating it from the shaft 150. One end of the shaft 150, near the outer wall of the cover 320, is smooth, allowing the cover 320 to slide on it. A sealing ring is provided between them; this is existing technology and will not be described further. The outer wall of the shaft 150 has threads (not shown in the attached drawings), which mate with the impeller 180.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ceramic pump with an impeller anti-off structure, comprising a base (100), a support seat I (140) arranged on the top of the base (100), a pump shell (160) connected with the support seat I (140), a pump cover (170) connected with the pump shell (160), and an impeller (180) arranged on the pump shell (160), characterized in that, The impeller (180) is threadedly connected with a rotating shaft (150), an outer side wall of the rotating shaft (150) is provided with a limiting mechanism (300), the limiting mechanism (300) comprises: a box body (350) arranged on the outer side wall of the rotating shaft (150); a ring body two (310) arranged on one side of the impeller (180); a friction part (330) rotationally connected to the rotating shaft (150); a resilient part (340) with two ends respectively fixed with the friction part (330) and the box body (350), when the rotating shaft (150) drives the impeller (180) to rotate counterclockwise, under the action of centrifugal force, the friction part (330) will adhere to and press the inner side wall of the ring body two (310), and the action makes the impeller (180) and the rotating shaft (150) locked with each other.

2. The ceramic pump with the impeller anti-disengagement structure according to claim 1, characterized in that: The friction part (330) is provided with at least two, and the two friction parts (330) are distributed in the inside of the box body (350) in the form of an axial array.

3. The ceramic pump with the impeller anti-disengagement structure according to claim 2, characterized in that: One side surface of the friction part (330) close to the inner side wall of the ring body two (310) is an arc surface, and the inner side wall of the ring body two (310) is provided with a groove matched with the friction part (330).

4. The ceramic pump with the impeller anti-disengagement structure according to claim 3, characterized in that: The resilient part (340) is a spring or a spring sheet.

5. The ceramic pump with the impeller anti-disengagement structure according to any one of claims 1-4, characterized in that: The inside of the rotating shaft (150) is provided with a transmission mechanism (400), when the liquid with pressure is introduced into the pump shell (160), the liquid pressure will drive the transmission mechanism (400) to act, so that it presses the friction part (330), the friction part (330) adheres to and presses the inner side wall of the ring body two (310) in turn, so that the impeller (180) and the rotating shaft (150) enter the locked state.

6. The ceramic pump with the impeller anti-disengagement structure according to claim 5, characterized in that: The transmission mechanism (400) comprises: a connecting rod (410) slidably connected to the inside of the rotating shaft (150) through a support, one end of the connecting rod (410) is fixed with a cover body (320); a track two (420) fixed to the outer side wall of the connecting rod (410); a rod body two (440) slidably connected to the rotating shaft (150).

7. The ceramic pump with the impeller anti-disengagement structure according to claim 6, characterized in that: The outer side of the rod body two (440) is provided with a spring two (430), one end of the spring two (430) is fixed with the inner side wall of the rotating shaft (150), and the other end is fixed with the rod body two (440).

8. The ceramic pump with the impeller anti-disengagement structure according to claim 7, characterized in that: The top of the base (100) is provided with a fixing mechanism (200), when it is necessary to fix the rotating shaft (150), the cover body (320) can be detached, and a special tool is used to press the connecting rod (410) to a specified depth, which will drive the fixing mechanism (200) to work, so as to realize reliable mechanical fixation of the rotating shaft (150).

9. The ceramic pump with the impeller anti-disengagement structure according to claim 8, characterized in that: The fixing mechanism (200) comprises: Supporting base two (210), the top of the base (100) is fixed with supporting base two (210); Ring body one (220), the inner side wall of the ring body one (220) is fixed to the supporting base two (210), and the inner side wall of the ring body one (220) is provided with a plurality of grooves (230); The rod body one (240) is slid on the rotating shaft (150), the outer side of the rod body one (240) is provided with a spring one (260), one end of the spring one (260) is fixed with the rotating shaft (150), the other end is fixed with the rod body one (240), and the connecting rod (410) is provided with a track one (250) matched with the rod body one (240).

10. The ceramic pump with the impeller anti-disengagement structure according to claim 9, characterized in that: The top of the base (100) is provided with a motor (110) and a shaft coupling (120), the motor (110) is connected with the rotating shaft (150) through the shaft coupling (120), the outer side wall of the rotating shaft (150) is provided with a bearing box (130), and the bearing box (130) is fixed on the supporting base one (140).

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