Anti-cavitation leakage-proof centrifugal vortex magnetic drive pump

Abstract

The utility model belongs to the technical field of pump equipment, and relates to an anti-cavitation leakage-proof centrifugal vortex magnetic drive pump which comprises a front pump cover, a centrifugal impeller, a vortex impeller, a pump body, an inner magnetic rotor, an outer magnetic rotor, an isolation sleeve, a bearing box body, a driven shaft and a driving shaft. A water outlet is formed in the pump body, a left cavity communicated with the water inlet and a right cavity communicated with the water outlet are formed in the pump body, the left cavity and the right cavity are communicated with each other, the centrifugal impeller is installed in the left cavity, and the vortex impeller is installed in the right cavity; the centrifugal impeller and the vortex impeller are both installed at one end of the driven shaft, the inner magnetic rotor is installed at the other end of the driven shaft, the outer magnetic rotor is installed at one end of the driving shaft, the isolation sleeve is fixed to the pump body, and the outer magnetic rotor and the inner magnetic rotor are in non-contact transmission through magnetic force. The pump provided by the utility model not only has the performance of small flow and high lift, but also has anti-cavitation capability, and can reach the standard of zero leakage.

Description

Technical Field

[0001] The utility model relates to a centrifugal vortex magnetic pump with anti-cavitation and anti-leakage functions, belonging to the technical field of pump equipment. Background Technique

[0002] Vortex pumps are an ideal choice in the application fields of small flow rates and high head. Characterized by small flow rates and high head, they play an irreplaceable role in many complex working conditions. However, with the country's increasing emphasis on environmental protection and safety issues, as well as the strict implementation of relevant laws and regulations, more stringent requirements have been put forward for industrial fluid transportation equipment. Especially when dealing with flammable, explosive, easily vaporizable, and corrosive toxic liquids, safety and no leakage have become indispensable basic conditions.

[0003] In addition, in the petroleum and petrochemical industries, the net positive suction head (NPSH) is an important parameter to measure pumps. However, vortex pumps on the current market generally face the problem of high NPSH, which limits the wide application of vortex pumps in some industries.

[0004] Therefore, a pump that can both meet the performance of the vortex pump, has good anti-cavitation performance, and is safe and leakage-free is needed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a new technical solution to improve or solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution provided by the utility model is as follows: A centrifugal vortex magnetic pump with anti-cavitation and anti-leakage functions, including a front pump cover, a centrifugal impeller, a vortex impeller, a pump body, an inner magnetic rotor, an outer magnetic rotor, an isolation sleeve, a bearing housing, a driven shaft, and a driving shaft. The front pump cover is installed at the front end of the pump body. An inlet is provided on the front pump cover, and an outlet is provided on the pump body. An impeller chamber is provided inside the pump body. The impeller chamber is axially divided into a left chamber and a right chamber. The left chamber is communicated with the inlet, the right chamber is communicated with the outlet, and the left chamber and the right chamber are communicated with each other. The centrifugal impeller is installed in the left chamber, and the vortex impeller is installed in the right chamber. Both the centrifugal impeller and the vortex impeller are installed at one end of the driven shaft. The middle section of the driven shaft is installed in the pump body through a bearing assembly. The other end of the driven shaft is installed with the inner magnetic rotor. The driving shaft is installed in the bearing housing through a bearing. The outer magnetic rotor is installed at one end of the driving shaft close to the driven shaft. The open end of the isolation sleeve is fixed on the pump body. The isolation sleeve is located between the inner magnetic rotor and the outer magnetic rotor. The outer magnetic rotor and the inner magnetic rotor are driven without contact by magnetic force.

[0007] The technical solution provided by the present utility model has the following beneficial effects compared with the prior art: The centrifugal vortex magnetic pump of the present utility model has a centrifugal impeller and a vortex impeller. The centrifugal impeller uses centrifugal force to do work, which not only increases the water flow pressure but also ensures the stable output of flow rate and pressure without fluctuation, effectively preventing the occurrence of cavitation phenomenon. Subsequently, the water flow smoothly flows into the right chamber and, through the further action of the vortex impeller, obtains a greater pressure, and thus is efficiently and stably transported to the designated position and discharged. In addition, the isolation sleeve of the centrifugal vortex magnetic pump can completely isolate the liquid from the driving side, achieving safe zero leakage and ensuring zero leakage standards when transporting various sensitive liquids. Therefore, the centrifugal vortex magnetic pump of the present utility model not only has the performance of a vortex pump in terms of small flow rate and high head, but also needs to have cavitation resistance to overcome the deficiency of the existing vortex pump in terms of net positive suction head, and can also meet the zero leakage standard, providing a reliable guarantee for the liquid transportation process.

[0008] Based on the above technical solution, the present utility model can be further improved as follows.

[0009] Further, it further includes a flow channel replaceable module, which is detachably installed in the right chamber, and a liquid flow channel is provided on the inner wall of the flow channel replaceable module.

[0010] The beneficial effect of adopting the above further solution is that the flow channel part becomes a replaceable modular component, which is convenient to replace the flow channel according to different working requirements or maintenance requirements to meet different medium characteristics, flow rate and head requirements, without directly replacing the entire pump, improving the adaptability and maintenance efficiency of the pump.

[0011] Further, the front pump cover, centrifugal impeller, impeller housing, vortex impeller and flow channel replaceable module are sequentially detachably installed on the pump body from left to right.

[0012] The beneficial effect of adopting the above further solution is that the flow channel replaceable module can be replaced by sequentially removing the front pump cover, centrifugal impeller, impeller housing, vortex impeller and flow channel replaceable module.

[0013] Further, it further includes an impeller housing, which is installed between the centrifugal impeller and the vortex impeller, and a water flow inlet communicating the left chamber and the right chamber is provided on the impeller housing.

[0014] The beneficial effects of adopting the above further scheme are as follows. The impeller housing not only effectively isolates the left chamber and the right chamber, preventing direct mutual influence between the two, but also is provided with a water flow inlet on it. Through the water flow inlet on it, smooth transition of water flow is achieved. Specifically, the water flow first passes through the action of the centrifugal impeller in the left chamber, and work is done by the centrifugal force, so that the pressure is significantly increased. Subsequently, under the self-priming action of the vortex impeller, these high-pressure water flows are self-primed to the right chamber through the water flow inlet and continue their conveying process. During the whole process, the isolation function of the impeller housing ensures that the centrifugal impeller and the vortex impeller work independently and without interference with each other efficiently, thus improving the overall performance and stability of the pump.

[0015] Furthermore, it further includes a bracket, and the bracket is connected between the bearing housing and the pump body.

[0016] The beneficial effects of adopting the above further scheme are as follows. The bracket enhances the connection stability between the bearing housing and the pump body, reduces vibration and noise, and improves the running smoothness of the pump.

[0017] Furthermore, the bearing assembly includes a sliding bearing assembly, a bearing seat, a left retaining ring, a right retaining ring and a gland. The bearing seat is fixed in the pump body through the gland. The sliding bearing assembly is installed in the bearing seat and sleeved outside the driven shaft. The left retaining ring and the right retaining ring are respectively arranged at both ends of the sliding bearing assembly.

[0018] The beneficial effects of adopting the above further scheme are as follows. Through the bearing assembly, the support stability and rotation accuracy of the driven shaft are improved, friction and wear are reduced, and the service life of the bearing and the driven shaft is prolonged.

[0019] Furthermore, it further includes a shaft sleeve, and the shaft sleeve is sleeved on the driven shaft. The shaft sleeve is used to protect the driven shaft.

[0020] The beneficial effects of adopting the above further scheme are as follows. The shaft sleeve effectively isolates the direct contact between the sliding bearing assembly and the driven shaft, reduces friction and wear, protects the surface quality of the driven shaft, and prolongs the service life of the driven shaft.

[0021] Furthermore, a cooling channel is also opened on the pump body, and the inner cavity of the isolation sleeve is communicated with the impeller chamber through the cooling channel.

[0022] The beneficial effects of adopting the above further solution are as follows. Through the design of the cooling channels, the liquid in the impeller chamber can circulate, taking away the eddy current heat generated by the magnetic coupling, effectively reducing the temperature of the magnetic coupling, and improving the operation stability and reliability of the pump. After the liquid in the impeller chamber enters the inner cavity of the isolation sleeve through the cooling passage, it flows back into the impeller chamber through the hollow inner cavity of the driven shaft, taking away the eddy current heat generated by the magnetic coupling.

[0023] Further, the inner magnetic rotor is fixed to the end of the driven shaft by a round nut and a lock washer.

[0024] The beneficial effects of adopting the above further solution are as follows. It ensures the firm connection of the inner magnetic rotor on the driven shaft, preventing it from loosening or falling off during high-speed rotation. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0026] Figure 1 It is a schematic structural diagram of the present invention;

[0027] In the figure, 1, front pump cover; 101, water inlet; 2, centrifugal impeller; 3, impeller housing; 4, vortex impeller; 5, flow channel replaceable module; 6, pump body; 601, water outlet; 701, left retaining ring; 702, right retaining ring; 801, bearing housing; 802, gland; 9, bracket; 10, inner magnetic rotor; 11, outer magnetic rotor; 12, isolation sleeve; 13, bearing housing body; 14, nut; 15, lock washer; 16, driven shaft; 17, sliding bearing assembly; 18, shaft sleeve; 19, driving shaft. Detailed Embodiments

[0028] The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not imply any priority in order or specific technical meaning. In addition, the concepts of "connection" and "coupling" mentioned in this application, unless otherwise specifically stated, are considered to include both direct connection (coupling) and indirect connection (coupling).

[0029] When interpreting the description of this application, it should be clear that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the perspective and layout shown in the drawings, aiming to facilitate the description and simplify the description process, rather than an absolute limitation on the actual orientation, construction method and operation mode of the device or component. Therefore, these terms should not be understood as restrictive interpretations of the content of this application.

[0030] The principles and features of the present utility model will be described below in conjunction with examples. The examples given are only for explaining the present utility model and are not used to limit the scope of the present utility model.

[0031] As Figure 1 shown, a centrifugal vortex magnetic pump with cavitation resistance and leakage prevention includes a front pump cover 1, a centrifugal impeller 2, a vortex impeller 4, a pump body 6, an inner magnetic rotor 10, an outer magnetic rotor 11, a isolation sleeve 12, a bearing housing 13, a driven shaft 16 and a driving shaft 19. The front pump cover 1 is installed at the front end of the pump body 6. An inlet 101 is provided on the front pump cover 1. An outlet 601 is provided on the pump body 6. An impeller chamber is provided in the pump body 6. The impeller chamber is axially divided into a left chamber and a right chamber. The left chamber is communicated with the inlet 101. The right chamber is communicated with the outlet 601. And the left chamber and the right chamber are communicated with each other. The centrifugal impeller 2 is installed in the left chamber. The vortex impeller 4 is installed in the right chamber. Both the centrifugal impeller 2 and the vortex impeller 4 are installed at one end of the driven shaft 16. The middle section of the driven shaft 16 is installed in the pump body 6 through a bearing assembly. The other end of the driven shaft 16 installs the inner magnetic rotor 10. The driving shaft 19 is installed in the bearing housing 13 through a bearing. The outer magnetic rotor 11 is installed at one end of the driving shaft 19 close to the driven shaft 16. The open end of the isolation sleeve 12 is fixed on the pump body 6. The isolation sleeve 12 is located between the inner magnetic rotor 10 and the outer magnetic rotor 11. The outer magnetic rotor 11 and the inner magnetic rotor 10 are in non-contact transmission through magnetic force.

[0032] The centrifugal vortex magnetic pump further includes a flow channel replaceable module 5, which is detachably installed in the right chamber. A liquid flow channel is provided on the inner wall of the flow channel replaceable module 5. The front pump cover 1, the centrifugal impeller 2, the impeller housing 3, the vortex impeller 4, and the flow channel replaceable module 5 are detachably installed on the pump body 6 in sequence from left to right. When it is necessary to adjust the flow rate or head of the pump, there is no need to replace the entire pump body 6. Instead, the front pump cover 1 can be simply disassembled. Subsequently, the centrifugal impeller 2, the impeller housing 3, the vortex impeller 4, and the flow channel replaceable module 5 can also be easily taken out. The user only needs to replace the vortex impeller with different sizes and select a flow channel replaceable module 5 that matches the replaced vortex impeller to ensure that the size of the flow channel is adapted to the size of the vortex impeller, and the adjustment of the flow rate and head of the centrifugal vortex magnetic pump can be quickly achieved. This not only simplifies the adjustment process but also greatly reduces the maintenance cost and time because there is no need to purchase a brand-new pump body 6. Only by replacing some components can the requirements of different technological processes be met.

[0033] The centrifugal vortex magnetic pump further includes an impeller housing 3, which is installed between the centrifugal impeller 2 and the vortex impeller 4. A water flow inlet communicating the left chamber and the right chamber is provided on the impeller housing 3. The impeller housing 3 not only effectively isolates the left chamber from the right chamber, preventing direct mutual influence between the two, but also has a water flow inlet. Through the water flow inlet on it, the smooth transition of water flow is achieved. Specifically, the water flow first passes through the action of the centrifugal impeller 2 in the left chamber, and the pressure is significantly increased by using the centrifugal force to do work. Subsequently, under the self-priming action of the vortex impeller 4, these high-pressure water flows are self-primed to the right chamber through the water flow inlet and continue their conveying process. During the whole process, the isolation function of the impeller housing 3 ensures that the centrifugal impeller 2 and the vortex impeller 4 work independently and efficiently without interference, thereby improving the overall performance and stability of the pump.

[0034] The centrifugal vortex magnetic pump further includes a bracket 9, which is connected between the bearing housing 13 and the pump body 6. The bracket 9 enhances the connection stability between the bearing housing 13 and the pump body 6, reduces vibration and noise, and improves the running smoothness of the pump.

[0035] The bearing assembly includes a sliding bearing assembly 17, a bearing seat 801, a left retaining ring 701, a right retaining ring 702, and a gland 802. The bearing seat 801 is fixed in the pump body 6 through the gland 802. The sliding bearing assembly 17 is installed in the bearing seat 801 and sleeved outside the driven shaft 16. The left retaining ring 701 and the right retaining ring 702 are respectively provided at both ends of the sliding bearing assembly 17. The support stability and rotation accuracy of the driven shaft 16 are improved through the bearing assembly, friction and wear are reduced, and the service life of the bearing and the driven shaft 16 is prolonged.

[0036] The centrifugal vortex magnetic force further includes a shaft sleeve 18, which is located between the sliding bearing assembly 17 and the driven shaft 16, and is used to protect the driven shaft 16. The shaft sleeve 18 effectively isolates the direct contact between the sliding bearing assembly 17 and the driven shaft 16, reduces friction and wear, protects the surface quality of the driven shaft 16, and extends the service life of the driven shaft 16.

[0037] A cooling channel is also provided on the pump body 6, and the inner cavity of the isolation sleeve 12 is communicated with the impeller chamber through the cooling channel. After the liquid in the impeller chamber enters the inner cavity of the isolation sleeve 12 through the cooling channel, it flows back into the impeller chamber through the hollow inner cavity of the driven shaft 16, taking away the eddy current heat generated by the magnetic coupling.

[0038] The inner magnetic rotor 10 is fixed to the end of the driven shaft 16 by a round nut 14 and a locking washer 15. This ensures the firm connection of the inner magnetic rotor 10 on the driven shaft 16 and prevents it from loosening or falling off during high-speed rotation.

[0039] The working principle of the centrifugal vortex magnetic pump of the present invention is as follows: Water flow first enters the left chamber through the water inlet 101. The centrifugal impeller 2 uses centrifugal force to do work, which not only increases the water flow pressure but also ensures the stable output of flow rate and pressure without fluctuations, effectively preventing the occurrence of cavitation. Radial blades are installed on the outer wheel of the vortex impeller. The vortex impeller generates self-suction during rotation. Subsequently, the water flow smoothly enters the right chamber through the water flow inlet on the impeller housing 3 and obtains greater pressure after the further action of the vortex impeller, and is thus efficiently and stably transported to the designated position and discharged. In addition, the isolation sleeve 12 is hermetically connected to the pump body 6, which can completely isolate the transported liquid from the driving-side components, achieve safe zero leakage, and ensure the zero-leakage standard when transporting various sensitive liquids.

[0040] The centrifugal vortex magnetic pump of the present invention not only has the performance of a vortex pump in terms of small flow rate and high head, but also needs to have cavitation resistance to overcome the deficiency of the existing vortex pump in terms of net positive suction head (NPSH), and can also meet the zero-leakage standard, providing a reliable guarantee for the liquid transportation process.

[0041] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A centrifugal vortex magnetic pump with anti-cavitation and anti-leakage, characterized in that: The invention comprises a front pump cover (1), a centrifugal impeller (2), a vortex impeller (4), a pump body (6), an inner magnetic rotor (10), an outer magnetic rotor (11), an isolating sleeve (12), a bearing housing (13), a driven shaft (16) and a driving shaft (19), wherein the front pump cover (1) is mounted at the front end of the pump body (6), a water inlet (101) is provided on the front pump cover (1), a water outlet (601) is provided on the pump body (6), an impeller chamber is provided in the pump body (6), the impeller chamber is axially divided into a left chamber and a right chamber, the left chamber is connected to the water inlet (101), the right chamber is connected to the water outlet (601), and the left chamber and the right chamber are connected to each other, the centrifugal impeller (2) is mounted in the left chamber, and the vortex impeller (4) is connected to the water inlet (101). The impeller (4) is installed in the right chamber; the centrifugal impeller (2) and the vortex impeller (4) are both installed at one end of the driven shaft (16); the middle section of the driven shaft (16) is installed in the pump body (6) through a bearing assembly; the inner magnetic rotor (10) is installed at the other end of the driven shaft (16); the driving shaft (19) is installed in the bearing housing (13) through a bearing; the outer magnetic rotor (11) is installed at one end of the driving shaft (19) close to the driven shaft (16); the open end of the isolation sleeve (12) is fixed on the pump body (6); the isolation sleeve (12) is located between the inner magnetic rotor (10) and the outer magnetic rotor (11); the outer magnetic rotor (11) and the inner magnetic rotor (10) are non-contactly transmitted by magnetic force.

2. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to claim 1, characterized in that: It also comprises a flow channel replaceable module (5), the flow channel replaceable module (5) is detachably mounted in the right chamber, and a liquid flow channel is provided on the inner wall of the flow channel replaceable module (5).

3. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to claim 2, characterized in that: The front pump cover (1), the centrifugal impeller (2), the impeller housing (3), the vortex impeller (4) and the flow channel replaceable module (5) are detachably mounted on the pump body (6) in sequence from left to right.

4. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to any one of claims 1 to 3, characterized in that: It also comprises an impeller casing (3), wherein the impeller casing (3) is installed between the centrifugal impeller (2) and the vortex impeller (4), and the impeller casing (3) is provided with a water flow inlet communicating with the left chamber and the right chamber.

5. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to claim 4, characterized in that: It also includes a bracket (9), wherein the bracket (9) is connected between the bearing housing (13) and the pump body (6).

6. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to claim 1, characterized in that: The bearing assembly comprises a sliding bearing assembly (17), a bearing seat (801), a left retaining ring (701), a right retaining ring (702) and a pressure cover (802); the bearing seat (801) is fixed in the pump body (6) through the pressure cover (802); the sliding bearing assembly (17) is installed in the bearing seat (801) and sleeved on the outside of the driven shaft (16); and the left retaining ring (701) and the right retaining ring (702) are respectively provided at both ends of the sliding bearing assembly (17).

7. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to claim 1, characterized in that: It also comprises a shaft sleeve (18), wherein the shaft sleeve (18) is sleeved on the driven shaft (16), and the shaft sleeve (18) is used to protect the driven shaft (16).

8. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to claim 1, characterized in that: The pump body (6) is also provided with a cooling channel, and the inner cavity of the isolation sleeve (12) is connected to the impeller chamber through the cooling channel.

9. The anti-cavitation and anti-leakage centrifugal vortex magnetic pump according to claim 1, characterized in that: The inner magnetic rotor (10) is fixed to the end of the driven shaft (16) via a nut (14) and a stop washer (15).

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