Large chemical axial flow pump capable of being accurately adjusted

Abstract

The utility model discloses a large chemical engineering axial flow pump capable of being adjusted accurately, which comprises a pump body, a bearing component is arranged on the pump body, a rotating shaft is arranged in the pump body and the bearing component in a penetrating manner, the rotating shaft is rotatably arranged in the pump body and the bearing component, the bearing component is positioned with the rotating shaft through a spigot, and a plurality of bearing component adjusting screws are movably connected onto the pump body. A sealing box body is fixedly connected in the pump body, the rotating shaft penetrates through the sealing box body, a sealing component is arranged between the sealing box body and the rotating shaft, an impeller is fixedly connected to the rotating shaft, an inlet cover is arranged on the pump body, the impeller is located in a flow channel formed by the inlet cover and the pump body, and a plurality of inlet cover adjusting screws are movably arranged on the pump body. The inlet cover adjusting screw abuts against the inlet cover, and the rotating shaft is fixedly connected with an impeller blanking cap. According to the utility model, the problems of seal heating, aggravated seal wear and prolonged operation cycle of the pump caused by non-concentricity can be avoided, and the problems of volume loss and reduced efficiency of the pump caused by non-uniform clearance between the impeller and the inlet cover are also avoided.

Description

Technical Field

[0001] The utility model relates to the field of chemical axial flow pumps, in particular to a large chemical axial flow pump which can be precisely adjusted. Background Art

[0002] Axial flow pumps are suitable for large flow and low head applications, and are used for the forced circulation of various saturated solutions that are easy to crystallize in evaporation and concentration equipment in industries such as alkali making, salt making, citric acid, and sodium sulfate.

[0003] At present, for axial flow pumps with suspended structures, the following problems are usually encountered during pump operation: the pump part of the suspended axial flow pump is connected to the pipeline through a flange, the motor is installed on the ground, the pump components lack foot support, the bearing components are not concentric with the sealing box body, causing the seal to heat up and aggravate the seal wear; the impeller is fixed to the front end of the cantilever shaft, and the gravity of the impeller and the shaft makes the shaft have a certain deflection, so that the gap between the impeller and the inlet cover is smaller at the bottom and larger at the top. The position with a small gap is prone to friction, and the position with a large gap is prone to volume loss, which reduces the efficiency of the pump.

[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a large-scale chemical axial flow pump that can be precisely adjusted to overcome the problems existing in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a large-scale chemical axial flow pump which can be precisely adjusted to solve the problems existing in the above-mentioned prior art, reduce the problem that the bearing components and the sealing box body are not concentric, causing the seal to heat up and aggravate the seal wear; reduce the problem that the gap between the impeller and the inlet cover is small at the bottom and large at the top, the position with small gap is prone to friction, and the position with large gap is prone to volume loss, which reduces the efficiency of the pump.

[0006] To achieve the above purpose, the utility model provides the following solution: The utility model provides a large-scale chemical axial flow pump that can be precisely adjusted, including:

[0007] A pump body, wherein a bearing component is arranged on the pump body, a rotating shaft is passed through the pump body and the bearing component, the rotating shaft is rotatably arranged in the pump body and the bearing component, the bearing component is positioned with the rotating shaft through a stop, a plurality of bearing component adjustment screws are movably connected to the pump body, the bearing component adjustment screws abut against the bearing component, a sealing box body is fixedly connected to the pump body, the rotating shaft is passed through the sealing box body, a sealing component is arranged between the sealing box body and the rotating shaft, an impeller is fixedly connected to the rotating shaft, an inlet cover is arranged on the pump body, the impeller is located inside the flow channel formed by the inlet cover and the pump body, a plurality of inlet cover adjustment screws are movably arranged on the pump body, the inlet cover adjustment screws abut against the inlet cover, an impeller plugging cover is fixedly connected to the rotating shaft, the impeller plugging cover abuts against the impeller, and an impeller end cover is fixedly connected to the impeller.

[0008] The utility model discloses the following technical effects:

[0009] 1. The utility model provides a large chemical axial flow pump that can be precisely adjusted. An adjustment screw is provided at the bearing housing to adjust the relative position of the bearing component and the sealing box body to ensure that the circumferential clearance between the shaft and the sealing box body is uniform, avoid eccentricity leading to heat generation of the seal, aggravate seal wear, and extend the operation cycle of the pump;

[0010] 2. The utility model provides a large chemical axial flow pump that can be precisely adjusted. An adjustment screw is provided at the inlet cover to adjust the relative position of the impeller and the inlet cover to ensure that the gap between the impeller and the inlet cover is uniform up and down, avoid volume loss caused by a large upper gap, avoid friction between the inlet cover and the impeller caused by a small lower gap, and improve the efficiency of the pump;

[0011] The utility model solves the problems in the prior art that the bearing components of the suspended axial flow pump are not concentric with the sealing box body, causing the seal to heat up and aggravate the seal wear; the gap between the impeller and the inlet cover is uneven up and down, resulting in low pump efficiency and easy friction between the impeller and the inlet cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 This is a schematic diagram of the structure of a large chemical axial flow pump that can be precisely adjusted according to the utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0015] Among them, 1. bearing components; 2. bearing component adjustment screws; 3. pump body; 4. sealing components; 5. rotating shaft; 6. sealing box body; 7. impeller; 8. impeller plug cover; 9. impeller end cover; 10. inlet cover adjustment screws; 11. inlet cover. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Reference Figure 1-2 The utility model provides a large chemical axial flow pump which can be precisely adjusted, comprising:

[0019] A pump body 3 is provided with a bearing component 1. A rotating shaft 5 is penetrated in the pump body 3 and the bearing component 1. The rotating shaft 5 is rotatably arranged in the pump body 3 and the bearing component 1. The bearing component 1 is positioned with the rotating shaft 5 through a stop. A plurality of bearing component adjustment screws 2 are movably connected to the pump body 3. The bearing component adjustment screws 2 abut against the bearing component 1. A sealing box body 6 is fixedly connected in the pump body 3. The rotating shaft 5 is penetrated in the sealing box body 6. A sealing component 4 is arranged between the sealing box body 6 and the rotating shaft 5. An impeller 7 is fixedly connected to the rotating shaft 5. An inlet cover 11 is provided on the pump body 3. The impeller 7 is located inside the flow channel formed by the inlet cover 11 and the pump body 3. A plurality of inlet cover adjustment screws 10 are movably arranged on the pump body 3. The inlet cover adjustment screws 10 abut against the inlet cover 11. An impeller plugging cover 8 is fixedly connected to the rotating shaft 5. The impeller plugging cover 8 abuts against the impeller 7. An impeller end cover 9 is fixedly connected to the impeller 7.

[0020] The pump body 3 is provided with a bearing component adjustment screw 2. By adjusting the bearing component adjustment screw 2, the bearing component 1 can be adjusted, thereby adjusting the rotating shaft 5. The rotating shaft 5 and the sealing component 4 are adjusted in the sealing box body 6. Four points are taken in the circumferential direction of the sealing box body 6, so that the sleeve in the sealing component 4 and the sealing box body 6 have equal gaps at 4 points, so that the bearing component 1 and the sealing box body 6 are concentric, reducing the heat generation of the seal, extending the service life of the seal, and improving the operation cycle of the pump; the pump body 3 is provided with an inlet cover adjustment screw 10 at one end of the inlet cover 11, and marking points are made on the inlet cover 11 according to the number of blades. The rotating shaft 5 is rotated to measure the gap between each blade and each marking point, and the average value is recorded and calculated. The inlet cover adjustment screw 10 is used for adjustment to ensure that the gap between the impeller 7 and the inlet cover 11 is equal to the average value, avoiding the upper gap causing volume loss, avoiding the lower gap causing friction between the inlet cover and the impeller, and improving the efficiency of the pump. In this embodiment, the number of inlet cover adjustment screws 10 is 4, which are evenly distributed on the pump body 3.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A large chemical axial flow pump that can be precisely adjusted, characterized in that ,include: A pump body (3), wherein a bearing component (1) is arranged on the pump body (3), a rotating shaft (5) is passed through the pump body (3) and the bearing component (1), the rotating shaft (5) is rotatably arranged in the pump body (3) and the bearing component (1), the bearing component (1) is positioned with the rotating shaft (5) through a stopper, a plurality of bearing component adjustment screws (2) are movably connected to the pump body (3), the bearing component adjustment screws (2) are in contact with the bearing component (1), a sealing box (6) is fixedly connected to the pump body (3), the rotating shaft (5) is passed through the sealing box (6), and the sealing box (6) is ) and the rotating shaft (5), an impeller (7) is fixedly connected to the rotating shaft (5), an inlet cover (11) is provided on the pump body (3), the impeller (7) is located inside the flow channel formed by the inlet cover (11) and the pump body (3), a plurality of inlet cover adjustment screws (10) are movably provided on the pump body (3), the inlet cover adjustment screws (10) are in contact with the inlet cover (11), an impeller plugging cover (8) is fixedly connected to the rotating shaft (5), the impeller plugging cover (8) is in contact with the impeller (7), and an impeller end cover (9) is fixedly connected to the impeller (7).

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