Multi-blade narrow-runner stainless steel impeller casting

Abstract

The utility model relates to the technical field of impeller castings, in particular to a multi-blade narrow-runner stainless steel impeller casting which comprises a pump cover, a rotating shaft is rotatably connected to the pump cover, a rear cover plate is slidably connected to the rotating shaft, a plurality of blades are mounted on the rear cover plate, a plurality of first positioning grooves are formed in the rear cover plate, and two positioning columns are fixedly connected to the two sides of each blade. The two positioning columns on one side of each blade are clamped in the corresponding first positioning grooves, the ends, opposite to the rear cover plate, of the multiple blades abut against the same front cover plate, the front cover plate is slidably connected with the rear cover plate, multiple second positioning grooves are formed in the front cover plate, and the two positioning columns on the other side of each blade are clamped in the second positioning grooves. A fixing structure is mounted on the rotating shaft; the positioning columns are clamped with the first positioning grooves and the second positioning grooves correspondingly, so that the blades are installed between the two cover plates, the single blade can be freely detached and replaced, the whole structure of the impeller does not need to be replaced during maintenance and replacement, and the maintenance cost of the impeller is reduced.

Description

Technical Field

[0001] The utility model relates to an impeller casting, specifically a multi-blade narrow-flow-channel stainless steel impeller casting, belonging to the technical field of impeller castings. Background Technique

[0002] The impeller refers to both the wheel disc equipped with moving blades, which is a component of the impulse steam turbine rotor, and can also refer to the general term of the wheel disc and the rotating blades installed thereon. In equipment such as centrifugal pumps, compressors, and wind turbines, the impeller is a core component responsible for converting mechanical energy into the kinetic energy and pressure energy of the fluid. In equipment such as pumps, the fluid with particles impacts and damages the pump impeller, resulting in blade damage, and the blade damage will affect the performance of the equipment, such as a decrease in the outlet flow rate of the pump and unstable pressure. Therefore, when the blade is damaged, the blade needs to be replaced in a timely manner.

[0003] However, for the traditional impeller, the front cover plate, the rear cover plate and the blades are fixedly connected, and the blades cannot be disassembled. When the blades are damaged and need to be repaired and replaced, the entire impeller structure needs to be replaced. Therefore, the impeller repair and replacement method is not flexible, and serious material waste is caused, resulting in high impeller maintenance costs. Content of the Utility Model

[0004] The purpose of the utility model is to provide a multi-blade narrow-flow-channel stainless steel impeller casting to solve the above problems. By engaging the positioning posts with the first positioning grooves and the second positioning grooves respectively, the blades are installed between the front cover plate and the rear cover plate, so that a single blade can be freely disassembled and replaced. When repairing and replacing, there is no need to replace the overall structure of the impeller, thus reducing the maintenance cost of the impeller.

[0005] The utility model realizes the above purpose through the following technical solutions. The multi-blade narrow-flow-channel stainless steel impeller casting includes a pump cover, a rotating shaft is rotatably connected to the pump cover, an impeller structure is installed on the rotating shaft, the impeller structure includes a rear cover plate, the rear cover plate is slidably connected to the rotating shaft, a plurality of blades are installed on the rear cover plate, a plurality of first positioning grooves are opened on the rear cover plate, two positioning posts are fixedly connected to both sides of the blade, two of the positioning posts on one side of the blade are engaged in the corresponding first positioning grooves, one end of the plurality of blades facing away from the rear cover plate abuts against the same front cover plate, the front cover plate is slidably connected to the rear cover plate, a plurality of second positioning grooves are opened on the front cover plate, and two of the positioning posts on the other side of the blade are engaged in the second positioning grooves, and a fixing structure is installed on the rotating shaft.

[0006] The further setting of the utility model is that the cross-section of the rear cover plate is in a "T" shape structure, the plurality of blades are distributed in a circumferential array, and the blades are in an arc shape structure.

[0007] A further setting of the present utility model is that the end of the positioning post is in a conical structure, and the opening positions of the first positioning groove and the second positioning groove correspond to each other.

[0008] A further setting of the present utility model is that a sliding groove is provided on the rear cover plate, a positioning block is slidably connected in the sliding groove, and the positioning block is fixedly connected to the front cover plate.

[0009] A further setting of the present utility model is that the sliding groove is in a "T" shape structure, and the positioning block is in a "T" shape structure.

[0010] A further setting of the present utility model is that the fixing structure includes a fixing ring, the fixing ring is threadedly connected to the rear cover plate, the fixing ring abuts against the front cover plate, and a first groove is provided on the fixing ring.

[0011] A further setting of the present utility model is that a gasket is slidably connected to the rotating shaft, the gasket abuts against the fixing ring, a nut is threadedly connected to the rotating shaft, and the nut abuts against the gasket.

[0012] A further setting of the present utility model is that a sleeve is slidably connected to the rotating shaft, the sleeve is rotatably connected to the pump cover, the sleeve abuts against the rear cover plate, two threaded rings are threadedly connected to the rotating shaft, the two threaded rings abut against each other, one of the threaded rings abuts against the sleeve, and a second groove is provided on the threaded ring.

[0013] A further setting of the present utility model is that a pump body is installed on the pump cover, a motor is provided at one end of the rotating shaft facing away from the impeller structure, the output end of the motor is fixedly connected to the rotating shaft, and the motor is installed on the bottom plate.

[0014] A further setting of the present utility model is that two connecting blocks are fixedly connected to the water inlet of the pump body, the two connecting blocks are symmetrically distributed up and down about the middle of the water inlet, and balance holes are provided on both the rear cover plate and the front cover plate.

[0015] The beneficial effects of the present utility model are as follows: A rotating shaft is rotatably connected to the pump cover, a rear cover plate is slidably connected to the rotating shaft, a plurality of blades are installed on the rear cover plate, a plurality of first positioning grooves are provided on the rear cover plate, two positioning posts are fixedly connected to both sides of the blade, two positioning posts on one side of the blade are engaged in the corresponding first positioning grooves, one end of the plurality of blades facing away from the rear cover plate abuts against the same front cover plate, the front cover plate is slidably connected to the rear cover plate, a plurality of second positioning grooves are provided on the front cover plate, and two positioning posts on the other side of the blade are engaged in the second positioning grooves; by engaging the positioning posts with the first positioning grooves and the second positioning grooves respectively, the blades are installed between the front cover plate and the rear cover plate, so that a single blade can be freely disassembled and replaced, and the overall structure of the impeller does not need to be replaced during maintenance and replacement, thereby reducing the maintenance cost of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the connection structure between the blade and the rear cover plate of the present utility model;

[0018] Figure 3 is a schematic diagram of the connection structure between the blade and the positioning post of the present utility model;

[0019] Figure 4 is a schematic diagram of the connection structure between the front cover plate and the balance hole of the present utility model;

[0020] Figure 5 is a schematic diagram of the connection structure between the rear cover plate and the sliding groove of the present utility model;

[0021] Figure 6 is a schematic diagram of the connection structure between the fixing structure and the impeller structure of the present utility model;

[0022] Figure 7 is Figure 6 an enlarged schematic diagram of part A shown in;

[0023] Figure 8 is a schematic diagram of the connection structure between the pump cover and the pump body of the present utility model.

[0024] In the figure: 1, pump cover; 2, pump body; 3, motor; 4, rotating shaft; 5, shaft sleeve; 6, impeller structure; 601, rear cover plate; 602, blade; 603, first positioning groove; 604, positioning post; 605, front cover plate; 606, second positioning groove; 7, fixing structure; 701, fixing ring; 702, first groove; 703, gasket; 704, nut; 705, threaded ring; 706, second groove; 8, balance hole; 9, sliding groove; 10, positioning block; 11, connecting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions of the present utility model will be further described below in conjunction with the drawings and through specific embodiments. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the attached drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the attached drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Please refer to Figure 1-8 As shown, the multi-vane narrow-flow-channel stainless steel impeller casting includes a pump cover 1. A rotating shaft 4 is rotatably connected to the pump cover 1. An impeller structure 6 is installed on the rotating shaft 4. The impeller structure 6 includes a rear cover plate 601. The rear cover plate 601 is slidably connected to the rotating shaft 4. A plurality of vanes 602 are installed on the rear cover plate 601. A plurality of first positioning grooves 603 are formed on the rear cover plate 601. Two positioning columns 604 are fixedly connected to both sides of the vane 602. Two of the positioning columns 604 on one side of the vane 602 are engaged in the corresponding first positioning grooves 603. One end of the plurality of vanes 602 facing away from the rear cover plate 601 abuts against the same front cover plate 605. The front cover plate 605 is slidably connected to the rear cover plate 601. A plurality of second positioning grooves 606 are formed on the front cover plate 605. Two of the positioning columns 604 on the other side of the vane 602 are engaged in the second positioning grooves 606. The cross-section of the rear cover plate 601 is in a "T" shape. The plurality of vanes 602 are distributed in a circumferential array. The vane 602 is in an arc shape. A fixing structure 7 is installed on the rotating shaft 4.

[0028] As a technical optimization scheme of the present utility model, the end of the positioning column 604 is in a conical structure, and the opening positions of the first positioning groove 603 and the second positioning groove 606 correspond; it is convenient for the positioning column 604 to be quickly engaged with the positioning grooves on the front and rear cover plates, so that the installation of the vane 602 is more convenient and flexible.

[0029] As a technical optimization solution of the present utility model, a chute 9 is provided on the rear cover plate 601. A positioning block 10 is slidably connected in the chute 9. The positioning block 10 is fixedly connected to the front cover plate 605. The chute 9 is in a "T" - shaped structure, and the positioning block 10 is in a "T" - shaped structure. Since both the positioning block 10 and the chute 9 are in a "T" - shaped structure, it effectively prevents the positioning block 10 from slipping out of the chute 9. The cooperation of the positioning block 10 and the chute 9 has a positioning effect on the front cover plate 605. When the front cover plate 605 is installed, the second positioning groove 606 formed thereon is aligned with the two positioning posts 604 on the other side of the blade 602. Therefore, the second positioning groove 606 can be quickly engaged with the blade 602, making the installation of the front cover plate 605 more convenient and efficient, and preventing the front cover plate 605 from rotating on the rear cover plate 601, increasing the stability of the installation of the front cover plate 605.

[0030] As a technical optimization solution of the present utility model, the fixing structure 7 includes a fixing ring 701. The fixing ring 701 is threadedly connected to the rear cover plate 601. The fixing ring 701 abuts against the front cover plate 605. A first groove 702 is provided on the fixing ring 701. A gasket 703 is slidably connected to the rotating shaft 4. The gasket 703 abuts against the fixing ring 701. A nut 704 is threadedly connected to the rotating shaft 4. The nut 704 abuts against the gasket 703. A sleeve 5 is slidably connected to the rotating shaft 4. The sleeve 5 is rotatably connected to the pump cover 1. The sleeve 5 abuts against the rear cover plate 601. Two threaded rings 705 are threadedly connected to the rotating shaft 4. The two threaded rings 705 abut against each other. One of the threaded rings 705 abuts against the sleeve 5. A second groove 706 is provided on the threaded ring 705. By using the fixing structure 7 to fix the impeller structure 6, the fixing ring 701 is threadedly connected to the end of the rear cover plate 601, so that the fixing ring 701 presses against the front cover plate 605, thereby preventing the front cover plate 605 from sliding back and forth on the rear cover plate 601. Then, the gasket 703 is sleeved on the rotating shaft 4, and then the nut 704 is sleeved on the rotating shaft 4. Rotate the nut 704 in the direction of the impeller structure 6. The nut 704 drives the gasket 703 to move. Continuously rotate the nut 704 until the gasket 703 presses against the fixing ring 701. Then, rotate the two threaded rings 705 in turn, so that the threaded rings 705 press against the sleeve 5 and push the sleeve 5 to press against the rear cover plate 601. The fixing structure 7 clamps the impeller structure 6 from both sides, making the installation of the impeller structure 6 more firm, preventing the positioning grooves on the rear cover plate 601 and the front cover plate 605 from no longer engaging with the positioning posts 604, and thus preventing the pump performance from being affected due to the loose installation of the impeller structure 6.

[0031] As a technical optimization solution of the present utility model, a pump body 2 is installed on the pump cover 1. One end of the rotating shaft 4 facing away from the impeller structure 6 is provided with a motor 3. The output end of the motor 3 is fixedly connected to the rotating shaft 4. The motor 3 is installed on the bottom plate. The pump body 2 is installed on the pump cover 1 by docking the flange on the pump cover 1 with the flange on the pump body 2, and then the rotating shaft 4 is fixedly connected to the output shaft of the motor 3, so that the whole pump is in an operating state.

[0032] As a technical optimization solution of the present utility model, two connecting blocks 11 are fixedly connected to the water inlet of the pump body 2. The two connecting blocks 11 are symmetrically distributed up and down about the middle of the water inlet. Balancing holes 8 are provided on both the rear cover plate 601 and the front cover plate 605. The arrangement of the connecting blocks 11 prevents the occurrence of backflow and eddy current problems at the inlet of the impeller structure 6 during the operation of the pump, thereby avoiding the aggravation of pump vibration, noise, gasification, corrosion, etc. caused by backflow and eddy current. The blade 602 and the balancing hole 8 can effectively achieve the axial force balance of the pump, thereby reducing the bearing force and improving the smooth operation of the pump.

[0033] When the utility model is in use, first, when the impeller structure 6 is installed, two positioning posts 604 on one side of each of the multiple blades 602 are respectively snapped into the first positioning grooves 603 corresponding in position on the rear cover plate 601 in sequence, so that the blades 602 are quickly installed on the rear cover plate 601. Align the positioning block 10 with the sliding groove 9, then put the front cover plate 605 on the rear cover plate 601, and push the front cover plate 605 towards the direction of the blade 602. At this time, the positioning block 10 slides in the sliding groove 9. Continuously push the front cover plate 605 until the second positioning groove 606 on the front cover plate 605 is snapped with the corresponding positioning post 604 on the blade 602, so that the front cover plate 605 cooperates with the rear cover plate 601 to fix the blade 602. Furthermore, a single blade 602 can be freely disassembled and replaced, and there is no need to replace the entire impeller structure 6 during maintenance and replacement, thus reducing the maintenance cost of the impeller structure 6. And because both the positioning block 10 and the sliding groove 9 are in a "T" - shaped structure, it effectively prevents the positioning block 10 from slipping out of the sliding groove 9. The cooperation of the positioning block 10 and the sliding groove 9 has a positioning effect on the front cover plate 605, so that when the front cover plate 605 is installed, the second positioning groove 606 opened on it is aligned with the two positioning posts 604 on the other side of the blade 602. Therefore, the second positioning groove 606 can be quickly snapped with the blade 602, making the installation of the front cover plate 605 more convenient and efficient, and making the front cover plate 605 unable to rotate on the rear cover plate 601, increasing the stability of the installation of the front cover plate 605; Then, the impeller structure 6 is fixed by the fixing structure 7. Thread - connect the fixing ring 701 with the end of the rear cover plate 601, so that the fixing ring 701 abuts against the front cover plate 605, thus preventing the front cover plate 605 from sliding back and forth on the rear cover plate 601. Then, put the gasket 703 on the rotating shaft 4, and then put the nut 704 on the rotating shaft 4. Rotate the nut 704 towards the direction of the impeller structure 6. The nut 704 drives the gasket 703 to move. Continuously rotate the nut 704 until the gasket 703 abuts against the fixing ring 701. Then, rotate the two threaded rings 705 in sequence, so that the threaded rings 705 abut against the shaft sleeve 5, and push the shaft sleeve 5 to abut against the rear cover plate 601. The impeller structure 6 is clamped from both sides by the fixing structure 7, making the installation of the impeller structure 6 more firm, and preventing the positioning grooves on the rear cover plate 601 and the front cover plate 605 from no longer being snapped with the positioning posts 604, thus preventing the pump performance from being affected due to the loose installation of the impeller structure 6; When it is difficult to rotate the fixing ring 701 and the threaded ring 705 manually to a certain extent, insert the end of the crowbar into the first groove 702 or the second groove 706, and use a hammer to strike the crowbar, so that the crowbar drives the fixing ring 701 or the threaded ring 705 to rotate, thus making it more convenient for the operator to operate the fixing ring 701 or the threaded ring 705; Then, the flange on the pump cover 1 is docked with the flange on the pump body 2, so that the pump body 2 is installed on the pump cover 1. Then, fixedly connect the rotating shaft 4 with the output shaft of the motor 3, so that the whole pump is in an operating state;The setting of the connecting block 11 prevents the occurrence of backflow and vortex problems at the inlet of the impeller structure 6 during the operation of the pump, thereby avoiding the aggravation of pump vibration, noise, gasification, corrosion, etc. caused by backflow and vortex. The blade 602 and the balance hole 8 cooperate to effectively achieve the axial force balance of the pump, thereby reducing the bearing load and improving the smoothness of the pump operation.

[0034] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A multi-blade narrow channel stainless steel impeller casting, including a pump cover (1), characterized in that: The pump cover (1) is rotatably connected to a rotating shaft (4), an impeller structure (6) is mounted on the rotating shaft (4), the impeller structure (6) comprises a rear cover plate (601), the rotating shaft (4) is slidably connected to a rear cover plate (601), a plurality of blades (602) are mounted on the rear cover plate (601), a plurality of first positioning grooves (603) are formed on the rear cover plate (601), two positioning columns (604) are fixedly connected to both sides of the blade (602), and two positioning columns (604) on one side of the blade (602) are fixedly connected to the two positioning columns (604) on the two sides of the blade (602). The positioning column (604) is engaged in the corresponding first positioning groove (603), and one end of the plurality of blades (602) facing away from the rear cover plate (601) abuts against the same front cover plate (605), the front cover plate (605) is slidably connected to the rear cover plate (601), and the front cover plate (605) is provided with a plurality of second positioning grooves (606), and the two positioning columns (604) on the other side of the blade (602) are engaged in the second positioning grooves (606), and a fixing structure (7) is installed on the rotating shaft (4).

2. The multi-blade narrow flow channel stainless steel impeller casting according to claim 1, characterized in that: The cross section of the rear cover plate (601) is in a "T"-shaped structure, the plurality of blades (602) are distributed in a circular array, and the blades (602) are in an arc-shaped structure.

3. The multi-blade narrow flow channel stainless steel impeller casting according to claim 1, characterized in that: The end of the positioning column (604) is in a conical structure, and the opening positions of the first positioning groove (603) and the second positioning groove (606) correspond to each other.

4. The multi-blade narrow flow channel stainless steel impeller casting according to claim 2, characterized in that: The rear cover plate (601) is provided with a sliding groove (9), a positioning block (10) is slidably connected in the sliding groove (9), and the positioning block (10) is fixedly connected to the front cover plate (605).

5. The multi-blade narrow flow channel stainless steel impeller casting according to claim 4, characterized in that: The slide groove (9) is in a "T"-shaped structure, and the positioning block (10) is in a "T"-shaped structure.

6. The multi-blade narrow flow channel stainless steel impeller casting according to claim 1, characterized in that: The fixing structure (7) comprises a fixing ring (701), the fixing ring (701) is threadedly connected to the rear cover plate (601), the fixing ring (701) is in contact with the front cover plate (605), and a first groove (702) is provided on the fixing ring (701).

7. The multi-blade narrow flow channel stainless steel impeller casting according to claim 6, characterized in that: A gasket (703) is slidably connected to the rotating shaft (4), and the gasket (703) and the fixing ring (701) are in conflict with each other. A nut (704) is threadedly connected to the rotating shaft (4), and the nut (704) and the gasket (703) are in conflict with each other.

8. The multi-blade narrow flow channel stainless steel impeller casting according to claim 7, characterized in that: A shaft sleeve (5) is slidably connected to the rotating shaft (4), the shaft sleeve (5) is rotatably connected to the pump cover (1), the shaft sleeve (5) and the rear cover plate (601) are in contact with each other, two threaded rings (705) are threadedly connected to the rotating shaft (4), the two threaded rings (705) are in contact with each other, one of the threaded rings (705) is in contact with the shaft sleeve (5), and a second groove (706) is provided on the threaded ring (705).

9. The multi-blade narrow flow channel stainless steel impeller casting according to claim 1, characterized in that: A pump body (2) is mounted on the pump cover (1); a motor (3) is disposed at one end of the rotating shaft (4) facing away from the impeller structure (6); an output end of the motor (3) is fixedly connected to the rotating shaft (4); and the motor (3) is mounted on a base plate.

10. The multi-blade narrow flow channel stainless steel impeller casting according to claim 9, characterized in that: Two connection blocks (11) are fixedly connected to the water inlet of the pump body (2), and the two connection blocks (11) are symmetrically distributed up and down about the middle of the water inlet. Balance holes (8) are provided on the rear cover plate (601) and the front cover plate (605).

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