Finish turning tool for closed impeller of centrifugal pump

Abstract

The utility model discloses a finish turning tool for a closed impeller of a centrifugal pump, which belongs to the technical field of impeller machining and comprises a positioning column, and a locking component for locking and fixing is mounted on the positioning column. The locking assembly comprises a gasket, a nut, an open inner taper sleeve, a lining and an open outer taper sleeve, the lower end of the impeller is slidably connected with the open outer taper sleeve, the outer wall of the positioning column is slidably connected with the lining, the lining is in contact connection with the open outer taper sleeve and located at the upper end of the open outer taper sleeve, and the upper end of the positioning column is slidably connected with the open inner taper sleeve. The upper end of the open inner taper sleeve is in contact connection with a gasket, the upper end of the positioning column is in sliding connection with a gasket, the upper end of the positioning column is in threaded connection with a nut, and the lower end of the nut is in contact connection with the gasket; and an impeller assembly is mounted on the impeller. In this way, when the nut is in a loose state, the gap between the workpiece and the tensioning mandrel is large, and the workpiece is convenient to clamp and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of impeller processing, in particular to a fine turning processing tool for a centrifugal pump closed impeller. Background Art

[0002] The centrifugal pump closed impeller belongs to a key component of a water pump, which is composed of blades and front and rear covers. The closed impeller has a high efficiency and is widely used in centrifugal pumps.

[0003] For the outer diameter of the stuffing box positions at both ends of this impeller, a high coaxiality with the inner hole is required. The traditional processing method generally uses a bar clamped on the three-jaw of a lathe to turn a shaft for fitting with the hole of the impeller on-site, and then uses a gasket and a nut to lock and fix. Since there is a certain tolerance space for the impeller hole, there are problems that it is inconvenient to install and disassemble when the impeller hole is small, and there is too large a gap when the impeller hole is large, resulting in out-of-tolerance coaxiality. It is difficult to achieve the design requirements for the form and position accuracy, and the overall assembly form and position accuracy of the water pump are affected, thus affecting the operation stability of the water pump.

[0004] Based on this, the utility model designs a fine turning processing tool for a centrifugal pump closed impeller to solve the above problems. Content of the Utility Model

[0005] Aiming at the above-mentioned disadvantages of the prior art, the utility model provides a fine turning processing tool for a centrifugal pump closed impeller.

[0006] To achieve the above object, a fine turning processing tool for a centrifugal pump closed impeller is designed, including a positioning column, and a locking assembly locked and fixed on the positioning column;

[0007] The locking assembly includes a gasket, a nut, an open inner cone sleeve, a bushing and an open outer cone sleeve. The lower end of the positioning column is slidably connected with the open outer cone sleeve, the outer wall of the positioning column is slidably connected with the bushing, the bushing is in contact connection with the open outer cone sleeve and the bushing is located above the open outer cone sleeve, the upper end of the positioning column is slidably connected with the open inner cone sleeve, the lower end of the open inner cone sleeve is in contact connection with the bushing, the upper end of the open inner cone sleeve is in contact connection with the gasket, the upper end of the positioning column is slidably connected with the gasket, and the upper end of the positioning column is threadedly connected with the nut, and the lower end of the nut is in contact connection with the gasket;

[0008] It further includes an impeller assembly.

[0009] Furthermore, the gasket is made of stainless steel material, so as to have higher intergranular corrosion resistance.

[0010] Furthermore, the positioning column, the open inner cone sleeve and the bushing are connected with the impeller assembly.

[0011] Furthermore, the upper end of the positioning column is arranged in a conical shape, and this conical design can facilitate the assembly of materials.

[0012] Furthermore, both the inner tapered sleeve with opening and the outer tapered sleeve with opening are provided with notches, which further facilitates the expansion and contraction after being compressed and tightly fits with the workpiece.

[0013] Furthermore, the outer walls at the upper and lower ends of the bushing are provided with tapered outer walls, so as to facilitate the tight fit with the inner tapered sleeve with opening and the outer tapered sleeve with opening.

[0014] Furthermore, the impeller assembly includes a slot hole. The upper end of the positioning post is in contact connection with an impeller. A slot hole is opened in the impeller. The outer walls of the inner tapered sleeve with opening and the bushing are tightly fitted with the inner wall of the slot hole.

[0015] Compared with the prior art, in the present utility model, the outer tapered sleeve with opening, the bushing and the inner tapered sleeve with opening of the locking assembly are sequentially sleeved on the positioning post. At the same time, the gasket is placed on the inner tapered sleeve with opening. At this time, the nut on the positioning post is rotated. The downward movement of the nut drives the downward movement of the inner tapered sleeve with opening. At the same time, through the extrusion of the bushing, the outer wall of the inner tapered sleeve with opening is tightly fitted with the impeller assembly. Through the downward movement of the inner tapered sleeve with opening, the outer tapered sleeve with opening is pressed to be tightly fitted with the positioning post. After the nut is locked, the workpiece and the mandrel have theoretically zero clearance, and the coaxiality of the machined workpiece is high. When the nut is in a relaxed state, the clearance between the workpiece and the tensioning mandrel is large, which is convenient for clamping and disassembling the workpiece. Since this device can realize the functions of expansion and contraction, it is universal for workpieces with different tolerance sizes of the same kind of hole, improving the adaptability of the device. [Description of the Drawings]

[0016] Figure 1 is the front view of the present utility model Figure 1 ;

[0017] Figure 2 is the front view of the present utility model Figure 2 ;

[0018] Figure 3a and Figure 3b are the partial parts of the present utility model Figure 1 ;

[0019] Figure 4a and Figure 4b are the partial parts of the present utility model Figure 2 ;

[0020] Figure 5 is the third partial part drawing of the present utility model;

[0021] In the figure: 1. Impeller; 2. Gasket; 3. Nut; 4. Positioning post; 5. Inner tapered sleeve with opening; 6. Bushing; 7. Outer tapered sleeve with opening; 8. Slot hole; 9. Impeller assembly; 10. Locking assembly. [Detailed Embodiment]

[0022] The following further describes the present utility model in conjunction with the accompanying drawings:

[0023] In the following description, the "left", "right", "front", "rear", "upper", and "lower" mentioned are oriented in the perspective direction of the front view.

[0024] Embodiment 1

[0025] In some embodiments, referring to the accompanying drawings of the specification, a fine turning processing tooling for a closed impeller of a centrifugal pump includes a positioning column 4;

[0026] A locking assembly 10 is installed on the positioning column 4 in a locking and fixing manner;

[0027] The locking assembly 10 includes a gasket 2, a nut 3, an open inner cone sleeve 5, a bushing 6, and an open outer cone sleeve 7. The lower end of the positioning column 4 is slidably connected to the open outer cone sleeve 7, the outer wall of the positioning column 4 is slidably connected to the bushing 6, the bushing 6 is in contact connection with the open outer cone sleeve 7 and the bushing 6 is located above the open outer cone sleeve 7, the upper end of the positioning column 4 is slidably connected to the open inner cone sleeve 5, the lower end of the open inner cone sleeve 5 is in contact connection with the bushing 6, the upper end of the open inner cone sleeve 5 is in contact connection with the gasket 2, the upper end of the positioning column 4 is slidably connected to the gasket 2, the upper end of the positioning column 4 is threadedly connected to the nut 3, the lower end of the nut 3 is in contact connection with the gasket 2, and the positioning column 4, the open inner cone sleeve 5, and the bushing 6 are connected to the impeller assembly 9;

[0028] Preferably, the gasket 2 is made of stainless steel;

[0029] The stainless steel material has higher intergranular corrosion resistance.

[0030] Preferably, the upper end of the positioning column 4 is set to be conical;

[0031] The positioning column 4 with a conical upper end facilitates the assembly of materials;

[0032] Preferably, both the open inner cone sleeve 5 and the open outer cone sleeve 7 are provided with notches;

[0033] After being pressed, the open inner cone sleeve 5 and the open outer cone sleeve 7 are convenient for expansion and contraction to closely fit with the workpiece;

[0034] Preferably, the outer walls of the upper and lower ends of the bushing 6 are set to be conical outer walls;

[0035] The conical outer wall of the bushing 6 facilitates close fitting with the open inner cone sleeve 5 and the open outer cone sleeve 7;

[0036] In the embodiment of the present utility model, when the device starts to be assembled, the outer conical sleeve 7 with an opening, the bushing 6 and the inner conical sleeve 5 with an opening of the locking assembly 10 are sequentially sleeved on the positioning post 4. At the same time, the gasket 2 is placed on the inner conical sleeve 5 with an opening. At this time, the nut 3 on the positioning post 4 is rotated. The downward movement of the nut 3 drives the downward movement of the inner conical sleeve 5 with an opening. At the same time, through the extrusion of the bushing 6, the outer wall of the inner conical sleeve 5 with an opening is closely attached to the impeller assembly 9. Through the downward movement of the inner conical sleeve 5 with an opening, the outer conical sleeve 7 with an opening is pressed to be closely attached to the positioning post 4. After the nut 3 is locked, theoretically there is zero clearance between the workpiece and the mandrel, and the coaxiality of the machined workpiece is high. When the nut 3 is in a relaxed state, the clearance between the workpiece and the expanding mandrel is large, which is convenient for clamping and disassembling the workpiece. Since the device can realize the functions of expansion and contraction, it is universal for workpieces with different tolerance sizes of the same kind of hole, improving the adaptability of the device.

[0037] It further includes an impeller assembly 9;

[0038] The impeller assembly 9 includes a slot hole 8. The upper end of the positioning post 4 is in contact connection with an impeller 1. A slot hole 8 is opened in the impeller 1. The outer walls of the inner conical sleeve 5 with an opening and the bushing 6 are closely attached to the inner wall of the slot hole 8;

[0039] In the embodiment of the present utility model, when the device starts to be assembled, the slot hole 8 opened on the impeller 1 of the impeller assembly 9 is sleeved on the positioning post 4 and locked by rotating the nut 3. By quickly installing and fixing the impeller 1, the shaking and offset during use are avoided.

[0040] In summary, for the fine turning processing tooling of the centrifugal pump closed impeller described in the present utility model, the inner hole of the workpiece can be accurately positioned by the outer conical sleeve with an opening clamping the mandrel and the inner conical sleeve with an opening expanding the inner hole of the impeller, ensuring the machining accuracy of the parts. Compared with the prior art, it has high machining accuracy, novel structure, reasonable design, convenient clamping of the workpiece, solves the accuracy problems of part machining and the overall assembly of the water pump, and has strong applicability.

[0041] The content not detailed in this specification belongs to the well-known prior art of those skilled in the art. The standard parts used can be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. The circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0042] The present utility model is not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A tool for fine turning a closed impeller of a centrifugal pump, comprising a positioning column (4), characterized in that: A locking assembly (10) is installed on the positioning column (4) for locking and fixing; The locking assembly (10) comprises a gasket (2), a nut (3), an open inner cone sleeve (5), a bushing (6) and an open outer cone sleeve (7); the lower end of the positioning column (4) is slidably connected to the open outer cone sleeve (7); the outer wall of the positioning column (4) is slidably connected to the bushing (6); the bushing (6) is in contact with the open outer cone sleeve (7) and the bushing (6) is located at the upper end of the open outer cone sleeve (7); the upper end of the positioning column (4) is slidably connected to the open inner cone sleeve (5); the lower end of the open inner cone sleeve (5) is in contact with the bushing (6); the upper end of the open inner cone sleeve (5) is in contact with the gasket (2); the upper end of the positioning column (4) is slidably connected to the gasket (2); the upper end of the positioning column (4) is threadedly connected to the nut (3); the lower end of the nut (3) is in contact with the gasket (2); Also included is an impeller assembly (9).

2. The centrifugal pump closed impeller finishing tooling according to claim 1 is characterized in that: The gasket (2) is made of stainless steel.

3. The tooling for fine turning of a closed impeller of a centrifugal pump according to claim 2, characterized in that: The positioning column (4), the open inner cone sleeve (5) and the bushing (6) are connected to the impeller assembly (9).

4. The centrifugal pump closed impeller finishing tooling according to claim 3 is characterized in that: The upper end of the positioning column (4) is configured to be conical.

5. The centrifugal pump closed impeller finishing tooling according to claim 4 is characterized in that: The open inner cone sleeve (5) and the open outer cone sleeve (7) are both provided with notches.

6. The tooling for fine turning of a closed impeller of a centrifugal pump according to claim 5, characterized in that: The outer walls at the upper and lower ends of the bushing (6) are configured as tapered outer walls.

7. The tooling for fine turning of a closed impeller of a centrifugal pump according to claim 6, characterized in that: The impeller assembly (9) comprises a slot (8), the upper end of the positioning column (4) is in contact with the impeller (1), the impeller (1) is provided with a slot (8), and the outer walls of the open inner cone sleeve (5) and the bushing (6) are tightly fitted with the inner wall of the slot (8).

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