Stamping type magnetic transmission centrifugal pump

Abstract

The utility model provides a stamping type magnetic transmission centrifugal pump which comprises a pump body piece, the back face of the pump body piece is fixedly connected with a middle body through a bolt, a movable groove is formed in the middle body, and the two ends of the movable groove are fixedly connected with a sliding bearing and a thrust bearing respectively. The two ends of the pump shaft are fixedly connected with the inner side faces of the sliding bearing and the thrust bearing through shaft sleeves respectively, the end, located in the pump body piece, of the pump shaft is fixedly connected with the impeller piece through an impeller nut, and the other end of the pump shaft is fixedly connected with the inner magnetic rotor through a rear nut. Meanwhile, the back face of one end, away from the pump body piece, of the middle body is fixedly connected with an isolation sleeve piece through a bolt and an isolation sleeve sealing gasket, and the outer side face of the back face of the middle body is fixedly connected with the surface of a mounting frame of a motor shell. Through cooperation of the pump body part, the impeller part, the middle body and the pump shaft, the fluency of fluid flowing can be improved, vibration during operation can be effectively reduced, and the probability that internal parts of the centrifugal pump break down can be reduced in an auxiliary mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetic centrifugal pump technical field, concretely relates to a stamping type magnetic drive centrifugal pump. BACKGROUND

[0002] Centrifugal pump is worked by using impeller rotation to make water centrifugal motion, and magnetic drive centrifugal pump is the product that the working principle of permanent magnet coupling is used to centrifugal pump, has the performance of noiseless and zero leakage, magnetic drive centrifugal pump is the no-leakage pump that is widely used at present, and the pump body and impeller in its main parts are mainly made through casting process, but the inner surface of general casting is relatively rough, the flow channel of pump body cannot be finished, and the residual small iron slag in the flow channel of impeller is difficult to remove, thereby the running efficiency of pump is affected, and the wall thickness of casting cannot be made very thin, the unbalance amount is large when dynamic balance correction, the relative working hours for removing unbalance are more, and the manufacturing cost is also affected, and when fluid impact, the friction loss of bearing is easily increased, and the probability of failure of internal components of the centrifugal pump is increased. SUMMARY

[0003] In order to overcome the defects in the prior art, a stamping type magnetic drive centrifugal pump is provided to solve the problems in the background art.

[0004] In order to achieve the above-mentioned purpose, a stamping type magnetic drive centrifugal pump is provided, which comprises: a pump body piece, the pump body piece and the motor are fixedly connected on the upper surface of the bottom plate, the back surface of the pump body piece is fixedly connected with a middle body through bolts, the middle body is internally provided with a movable groove, the two ends of the movable groove are fixedly connected with a sliding bearing and a thrust bearing respectively, the two ends of the pump shaft are fixedly connected with the inner side surfaces of the sliding bearing and the thrust bearing through shaft sleeves respectively, one end of the pump shaft located in the interior of the pump body piece is fixedly connected with an impeller piece through an impeller nut, the other end of the pump shaft is fixedly connected with an inner magnetic rotor through a rear nut, the back surface of the end of the middle body away from the pump body piece is fixedly connected with an isolation sleeve piece through bolts and an isolation sleeve gasket, the outer side surface of the back surface of the middle body is fixedly connected with the mounting bracket surface of the motor shell through a support, the motor output shaft is fixedly connected with an outer magnetic rotor, and the isolation sleeve piece is arranged between the outer magnetic rotor and the inner magnetic rotor.

[0005] Preferably, the pump body piece is made of a mirror polished plate as raw material through stamping process and laser welding process, and a pump body sealing ring is arranged at the connection between the back surface of the pump body piece and the front surface of the middle body.

[0006] Preferably, the impeller piece is composed of an impeller main body, a front cover plate and a rear cover plate, the whole impeller piece is made of a mirror polished plate as raw material, and each component is made through stamping process, and the front cover plate, the impeller main body and the rear cover plate are fixedly connected through laser welding process.

[0007] Preferably, the middle body is internally provided with a plurality of groups of high-pressure drainage holes which are circumferentially and equidistantly arranged, and the axial section of each group of high-pressure drainage holes is in Z-shaped structure, and the corner of each high-pressure drainage hole is in arc structure.

[0008] Preferably, the outer circular arc surface of the impeller nut is circumferentially and equidistantly provided with a plurality of groups of radial drainage holes, and the end surface of the impeller nut is in conical protrusion.

[0009] Preferably, the spacer sleeve sealing gasket is in circular ring structure, the spacer sleeve sealing gasket is provided with a bolt for abutting and fixing the spacer sleeve assembly, and the axial section of the spacer sleeve assembly is in Chinese character-shaped structure.

[0010] Preferably, the bracket is in overall cylindrical structure, the outer side surface of each end of the bracket is provided with a protruding mounting portion, and the axial section of the bracket is in H-shaped structure.

[0011] Compared with the prior art, the centrifugal pump has the advantages that: through the cooperation of the pump body assembly, the impeller assembly, the middle body and the pump shaft, the smoothness of the flow channel surface of the centrifugal pump can be enhanced, the flow smoothness when the fluid flows through is improved, the operation efficiency of the centrifugal pump is assisted to be enhanced, the thickness of the shell can be reduced, the manufacturing cost is assisted to be reduced, the production efficiency is improved, the vibration amplitude generated when the impeller assembly rotates is reduced, the impact force of the fluid when flowing in the pump body assembly can be effectively reduced through the arrangement of the impeller nut and the high-pressure drainage hole, and the failure probability of the internal components of the centrifugal pump is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of the utility model embodiment.

[0013] Figure 2 It is a front view schematic diagram of the utility model embodiment. Figure 1 It is an enlarged schematic diagram of A of the utility model embodiment.

[0014] Figure 3 It is an enlarged schematic diagram of B of the utility model embodiment. Figure 1 It is an enlarged schematic diagram of C of the utility model embodiment.

[0015] Figure 4 It is an enlarged schematic diagram of C of the utility model embodiment. Figure 1 It is an enlarged schematic diagram of C of the utility model embodiment.

[0016] In the drawing: 1, pump body assembly;2, impeller nut;3, impeller assembly;4, middle body;5, pump body sealing ring;6, sliding bearing;7, shaft sleeve;8, pump shaft;9, spacer sleeve sealing gasket;10, thrust bearing;11, outer magnetic rotor;12, inner magnetic rotor;13, spacer sleeve assembly;14, rear nut;15, bracket;16, motor;17, bottom plate;18, radial drainage hole;19, high-pressure drainage hole. DETAILED DESCRIPTION

[0017] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0018] Referring to Figures 1 to 4 The utility model provides a kind of stamping type magnetic transmission centrifugal pump, it include: pump body piece 1, pump body piece 1 and motor 16 are all fixedly connected on the upper surface of bottom plate 17, the back of pump body piece 1 is fixedly connected middle body 4 by bolt, movable slot is set in middle body 4 inside, the both ends of movable slot are fixedly connected sliding bearing 6 and thrust bearing 10 respectively, and the inner side of sliding bearing 6 and thrust bearing 10 is fixedly connected by shaft sleeve 7 at the both ends of pump shaft 8 respectively, while the end of pump shaft 8 located in the inside of pump body piece 1 is fixedly connected impeller piece 3 by impeller nut 2, the other end of pump shaft 8 is fixedly connected inner magnetic rotor 12 by rear nut 14, while the back of the end of middle body 4 away from pump body piece 1 is fixedly connected isolation sleeve piece 13 by bolt and isolation sleeve sealing pad 9, and the outer side of the back of middle body 4 is fixedly connected the mounting bracket surface of motor 16 shell by support 15, and motor 16 output shaft is fixedly connected outer magnetic rotor 11, and isolation sleeve piece 13 is arranged between outer magnetic rotor 11 and inner magnetic rotor 12.

[0019] In the embodiment, pump body piece 1 and impeller piece 3 are both made of mirror polished plate as raw material, and are formed by stamping process, and then the corresponding components are fixedly connected by laser welding process, so that the pump body runner is smooth, the volute completely conforms to the advanced hydraulic model, the finishing time of pump body piece 1 is greatly shortened, the material cost is greatly reduced, the coupling of front cover plate and rear cover plate with impeller body is good, the runner surface is smooth and flat, the hydraulic performance of impeller piece 3 is effectively improved, the operation efficiency of the centrifugal pump is improved, the dynamic balance performance of impeller piece 3 is very good, the dynamic balance correction is convenient, the vibration during pump operation is very small, the service life of the pump can be extended, and the high-pressure drainage hole 19 symmetrically arranged on the surface of middle body 4 can improve the cooling and lubricating performance of the corresponding bearing, reduce the friction loss of the bearing, and the radial drainage hole 18 arranged on the impeller nut 2 can reduce the impact force of the fluid at the inlet of the centrifugal pump, and improve the anti-cavitation performance of the centrifugal pump.

[0020] As a preferred embodiment, pump body piece 1 is made of mirror polished plate as raw material, and is made by stamping process and laser welding process, and pump body sealing ring 5 is arranged between the back of pump body piece 1 and the front of middle body 4.

[0021] In the embodiment, as Figure 1 And Figure 4This can effectively enhance the smoothness of the internal flow channel of the pump body component 1, and the volute structure of the pump body component 1 fully conforms to the advanced hydraulic model. At the same time, it can greatly shorten the finishing time of the pump body component 1 and greatly reduce the material cost.

[0022] As a preferred embodiment, the impeller component 3 is composed of an impeller body, a front cover plate and a rear cover plate. The impeller component 3 is made of mirror-polished plate as the raw material, and each component is made by stamping process. At the same time, the front cover plate, the impeller body and the rear cover plate are fixedly connected by laser welding process.

[0023] In this embodiment, as Figure 1 The selection of materials and welding methods for impeller component 3 can effectively enhance the smoothness of the flow channel surface of impeller component 3, effectively improve the hydraulic performance of impeller component 3, and increase the working efficiency of the centrifugal pump.

[0024] As a preferred embodiment, multiple sets of high-pressure drainage holes 19 are opened at equal intervals around the circumference inside the middle body 4, and the axial cross-section of the multiple sets of high-pressure drainage holes 19 is Z-shaped, while the corners of the high-pressure drainage holes 19 are arc-shaped.

[0025] In this embodiment, as Figure 1 The high-pressure drainage hole 19 can improve the cooling and lubrication performance of the corresponding bearing pair and reduce the friction loss of the corresponding bearing pair, thereby helping to reduce the probability of failure of the internal components of the centrifugal pump.

[0026] In a preferred embodiment, the outer arc surface of the impeller nut 2 is provided with multiple sets of radial drainage holes 18 at equal intervals around the circumference, and the end face of the impeller nut 2 is a conical protrusion.

[0027] In this embodiment, as Figure 1 and Figure 2 The impeller nut 2 is designed to reduce the impact force of the fluid at the inlet of the centrifugal pump and improve the centrifugal pump's anti-cavitation performance.

[0028] In a preferred embodiment, the isolation sleeve sealing gasket 9 has a circular structure, and the isolation sleeve sealing gasket 9 provides bolts to correspondingly abut and fix the isolation kit 13, and the axial section of the isolation kit 13 has a Z-shaped structure.

[0029] In this embodiment, as Figure 1 and Figure 3 The installation of the isolation sleeve sealing gasket 9 can not only enhance the stability of the connection between the middle body 4 and the isolation kit 13, but also help to enhance the sealing of the connection between the two.

[0030] As a preferred embodiment, the bracket 15 has an overall cylindrical structure, and both ends of the bracket 15 have protruding mounting parts on their outer surfaces. The axial section of the bracket 15 is I-shaped.

[0031] In this embodiment, as Figure 1 The bracket 15 effectively enhances the protection of the centrifugal pump for its internal transmission components, reduces the probability of unexpected failures of the internal components due to foreign objects, and also helps to enhance the overall structural stability of the stamping magnetic drive centrifugal pump.

[0032] The stamping-type magnetic drive centrifugal pump of this utility model, through the cooperation of pump body 1, impeller 3, middle body 4 and pump shaft 8, can improve the smoothness of fluid flow, effectively reduce the vibration of the centrifugal pump during operation, and also help reduce the probability of failure of internal components of the centrifugal pump, improve the production efficiency of the centrifugal pump and reduce production costs.

[0033] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stamping-type magnetic drive centrifugal pump, comprising: The pump body (1) and the motor (16) are all fixedly connected to the upper surface of the base plate (17). The pump body (1) is fixedly connected to the middle body (4) by bolts on the back side. The middle body (4) has a movable groove inside. The two ends of the movable groove are fixedly connected to the sliding bearing (6) and the thrust bearing (10) respectively. The two ends of the pump shaft (8) are fixedly connected to the inner sides of the sliding bearing (6) and the thrust bearing (10) respectively by bushings (7). The end of the pump shaft (8) located inside the pump body (1) is fixed by the impeller nut (2). Connect the impeller part (3), and fix the other end of the pump shaft (8) to the inner magnetic rotor (12) by the rear nut (14). At the same time, fix the back of the middle body (4) away from the pump body part (1) to the isolation kit (13) by bolts and isolation sleeve gasket (9). The outer side of the back of the middle body (4) is fixed to the mounting bracket surface of the motor (16) housing by the bracket (15). The output shaft of the motor (16) is fixed to the outer magnetic rotor (11), and the isolation kit (13) is set between the outer magnetic rotor (11) and the inner magnetic rotor (12).

2. The stamping-type magnetic drive centrifugal pump according to claim 1, characterized in that, The pump body component (1) is made of mirror polished plate as raw material by stamping and laser welding process, and a pump body sealing ring (5) is provided at the connection between the back of the pump body component (1) and the front of the middle body (4).

3. The stamping-type magnetic drive centrifugal pump according to claim 1, characterized in that, The impeller component (3) consists of an impeller body, a front cover plate and a rear cover plate. The impeller component (3) is made of mirror polished plate as the raw material, and each component is made by stamping process. At the same time, the front cover plate, the impeller body and the rear cover plate are fixedly connected by laser welding process.

4. A stamping-type magnetic drive centrifugal pump according to claim 1, characterized in that, Multiple sets of high-pressure drainage holes (19) are opened at equal intervals around the interior of the middle body (4), and the axial cross section of the multiple sets of high-pressure drainage holes (19) is Z-shaped, while the corners of the high-pressure drainage holes (19) are arc-shaped.

5. A stamping-type magnetic drive centrifugal pump according to claim 1, characterized in that, The outer arc surface of the impeller nut (2) has multiple sets of radial drainage holes (18) at equal intervals around the circumference, and the end face of the impeller nut (2) is a conical protrusion.

6. A stamping-type magnetic drive centrifugal pump according to claim 1, characterized in that, The isolation sleeve sealing gasket (9) has a circular structure, and the isolation sleeve sealing gasket (9) provides bolts to fix the isolation kit (13) accordingly, and the axial section of the isolation kit (13) has a Z-shaped structure.

7. A stamping-type magnetic drive centrifugal pump according to claim 1, characterized in that, The bracket (15) has a cylindrical structure as a whole. Both ends of the bracket (15) have protruding mounting parts on their outer surfaces, and the axial section of the bracket (15) has an I-shaped structure.

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