Submersible pump impeller gap adjusting mechanism

Abstract

The utility model relates to the field of submersible pumps, in particular to a submersible pump impeller gap adjusting mechanism which comprises a motor component and a key a, an impeller is clamped outside the key a, the submersible pump impeller gap adjusting mechanism further comprises a lining plate which is assembled to be movably connected to the bottom of the impeller, and the effect of changing the gap between the lining plate and the impeller is achieved by adjusting the position of the lining plate. The set screw is assembled to be movably connected to the bottom of the lining plate, and the state of the lining plate can be changed by adjusting the rotation degree of the set screw; and the inner hexagon screw b is arranged to be used for fixing the connection between the bottom cover located at the bottom of the impeller and the lining plate. The lining plate moves downwards by screwing the fastening screws, then the lining plate is fixed to the bottom cover by screwing the inner hexagon screws b, then the fastening screws are screwed to enable the tops of the fastening screws to abut against the bottom of the lining plate, the movable lining plate is arranged on the bottom cover with the fixed position, and under the condition that the bottom cover is not moved, the lining plate is fixed to the bottom cover. The gap between the top of the lining plate and the impeller can be adjusted without disassembling the whole machine, and the practicability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible pumps, and in particular relates to a submersible pump impeller clearance regulating mechanism. Background Art

[0002] A submersible pump is a centrifugal pump, and its working principle is to lift or transport water by throwing out water through a high-speed rotating impeller. The characteristic of this pump is that the impeller and the motor driving the impeller are both submerged in water to work, so it is called a submersible electric pump. There are many types of submersible pumps, including deep wells and working surfaces. They are suitable for extraction from deep wells, hot water wells and oceans, and can also be used for extraction from rivers, reservoirs, canals, etc. They are mainly used for farmland irrigation and water for people and livestock in plateaus and mountainous areas. They can also be used for water supply and drainage in cities, factories, railways, mines, and construction sites. In the existing technology, most of them use closed impellers, and there is no adjustment of the gap between the bottom cover and the volute. There are relatively few open impellers with narrow flow channels for volutes with wide flow channels. It may be necessary to adjust the gap between the bottom cover and the impeller for different usage conditions, and the adjustment is difficult.

[0003] Therefore, the utility model proposes a submersible pump impeller clearance adjustment structure, which can be appropriately adjusted according to actual usage conditions for equipment with a volute with a wide flow channel and an open impeller with a narrow flow channel, and is easy to operate and install. Utility Model Content

[0004] The utility model aims to provide a submersible pump impeller clearance adjustment mechanism to solve the problem of a volute with a wide flow passage matching an open impeller with a narrow flow passage proposed in the above background technology.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme: a submersible pump impeller clearance adjustment mechanism, including a motor component and a key a, the key a is fixedly connected to the outer wall of the output shaft at the bottom of the motor component, the key a is externally clamped with an impeller, and also includes:

[0006] The liner is assembled to be movably connected to the bottom of the impeller, and the gap between the liner and the impeller can be changed by adjusting the position of the liner;

[0007] A set screw is assembled to be movably connected to the bottom of the liner, and the state of the liner can be changed by adjusting the rotation degree of the set screw;

[0008] The hexagon socket screw b is configured to fix the connection between the bottom cover at the bottom of the impeller and the liner. When the set screw is loosened, it is inserted into the bottom of the liner and slowly tightened. The position of the liner is determined and fixed according to the rotation of the impeller.

[0009] Preferably, a washer and a hexagon socket screw a are provided at the bottom of the impeller, and the hexagon socket screw a passes through the washer and is threadedly connected to the motor component.

[0010] Preferably, a volute is fixedly connected to the bottom of the motor component, and the impeller is located inside the volute.

[0011] Preferably, the bottom cover is located at the bottom of the volute, and the bottom cover is fixedly connected to the volute by bolts.

[0012] Preferably, the lining plate is movably connected to the stopper at the top of the bottom cover, the fixing screw passes through the bottom cover and is threadedly connected to the bottom cover, and the top of the fixing screw is movably connected to the bottom of the lining plate, and the hexagon socket screw b passes through the bottom cover and is threadedly connected to the lining plate.

[0013] Preferably, a circular ring a and a circular ring b are provided on the top of the bottom cover, the circular ring a is in contact with the outer side wall of the liner, and the circular ring b is in contact with the bottom side wall of the volute.

[0014] Beneficial effects:

[0015] (1) The utility model discloses a submersible pump impeller clearance adjustment mechanism. The liner is moved downward by loosening the set screw, and the liner is fixed to the bottom cover by inserting the hexagon socket screw b into the corresponding screw hole at the bottom of the liner and turning the hexagon socket screw b. The set screw is then turned to tighten the top of the liner against the bottom of the liner. A movable liner is provided on the bottom cover which is fixed in position. When the bottom cover is not moved, the clearance between the top of the liner and the impeller can be adjusted without disassembling the entire machine, thereby improving its practicality.

[0016] (2) In the impeller clearance adjustment mechanism of a submersible pump described in the utility model, the circular ring b ensures the sealing of the connection between the volute and the bottom cover. When the liner moves, the circular ring a on the bottom cover always contacts the liner, thereby preventing the movement of the liner from causing the sealing to deteriorate and affecting the use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front cross-sectional view of the overall structure of the utility model;

[0018] Figure 2 It is a bottom partial bottom view of the utility model;

[0019] Figure 3 for Figure 1 A magnified image of point A;

[0020] Figure 4 for Figure 1 Enlarged view of point B.

[0021] In the figure: 1. Motor components; 2. Key a; 3. Impeller; 4. Washer; 5. Hexagon socket screw a; 6. Volute; 7. Circular ring a; 8. Circular ring b; 9. Lining plate; 10. Set screw; 11. Bottom cover; 12. Hexagon socket screw b. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0023] Example: Figure 1-Figure 4 The impeller clearance adjustment mechanism of a submersible pump shown in the figure includes a motor component 1 and a key a2, wherein the key a2 is fixedly connected to the outer wall of the driving shaft fixedly connected to the bottom output end of the motor component 1, and the impeller 3 is clamped on the outside of the key a2, and also includes a lining plate 9, which is assembled to be movably connected to the bottom of the impeller 3, and the effect of changing the clearance between the lining plate 9 and the impeller 3 is achieved by adjusting the position of the lining plate 9; a set screw 10, which is assembled to be movably connected to the bottom of the lining plate 9, and the state of the lining plate 9 is changed by adjusting the rotation degree of the set screw 10; a hexagon socket screw b12, which is configured to fix the connection between the bottom cover 11 located at the bottom of the impeller 3 and the lining plate 9, and when the set screw 10 is loosened, it is inserted into the bottom of the lining plate 9 and slowly tightened, and the position of the lining plate 9 is determined and fixed according to the rotation of the impeller 3.

[0024] In this embodiment, the impeller 3 is fixed on the motor component 1, and can drive the impeller 3 to rotate when the output shaft of the motor component 1 rotates. The volute 6 is fixed to the bottom of the motor component 1 by bolts, and the bottom cover 11 is fixed to the bottom of the volute 6 by bolts. The lining 9 arranged on the stopper of the bottom cover 11 is adjustable, and the gap between the top of the lining 9 and the impeller 3 is adjusted by adjusting the position of the lining 9. When the hexagon socket screw b12 fixes the lining 9 at a relatively high position on the bottom cover 11, the gap between the top of the lining 9 and the impeller 3 is small. When the hexagon socket screw b12 fixes the lining 9 at a relatively low position on the bottom cover 11, the gap between the top of the lining 9 and the impeller 3 is large. After the hexagon socket screw b12 fixes the position of the lining 9, tighten the set screw 10 to make the lining 9 more stable. When adjusting the position of the lining 9, avoid the lining 9 hindering the rotation of the impeller 3.

[0025] like Figure 1 and Figure 2As shown, a washer 4 and a hexagon socket screw a5 are provided at the bottom of the impeller 3. The hexagon socket screw a5 passes through the washer 4 and is threadedly connected to the motor component 1. A volute 6 is fixedly connected to the bottom of the motor component 1. The impeller 3 is located inside the volute 6. The bottom cover 11 is located at the bottom of the volute 6. The bottom cover 11 is fixedly connected to the volute 6 by bolts.

[0026] In this embodiment, the impeller 3 is fixed to the motor component 1 by means of a key a2 and a hexagon socket screw a5. The key a2 is used as a circumferential fixation between the output shaft of the motor component 1 and the impeller 3 to transmit torque. The hexagon socket screw a5 located at the bottom of the impeller 3 connects the impeller 3 to the motor component 1, so that the impeller 3 is more stable when rotating. The impeller 3 is located inside the volute 6, and the bottom cover 11 is fixed to the bottom of the volute 6 by bolts.

[0027] like Figure 1-Figure 4 As shown, the lining plate 9 is movably connected to the stopper at the top of the bottom cover 11, the set screw 10 passes through the bottom cover 11 and is threadedly connected to the bottom cover 11, and the top of the set screw 10 is movably connected to the bottom of the lining plate 9, the hexagon socket screw b12 passes through the bottom cover 11 and is threadedly connected to the lining plate 9, and a circular ring a7 and a circular ring b8 are provided on the top of the bottom cover 11, the circular ring a7 is in contact with the outer side wall of the lining plate 9, and the circular ring b8 is in contact with the bottom side wall of the volute 6.

[0028] In this embodiment, the distance between the bottom cover 11 and the impeller 3 is fixed, and the lining plate 9 arranged on the stopper of the bottom cover 11 is adjustable, so as to adjust the gap between the lining plate 9 and the impeller 3. In normal use, the lining plate 9 is in a fixed state under the action of the hexagon socket screw a5 and the set screw 10. When adjustment is required, the hexagon socket screw b12 is removed. At this time, the lining plate 9 is supported by the set screw 10 at the bottom, and then the set screw 10 is loosened, and the lining plate 9 moves downward with the set screw 10, and then the lining plate 9 and the bottom cover 11 are reconnected by the hexagon socket screw b12 to the desired position. Tighten the hexagon socket screw b12 to fix the liner 9, and then tighten the set screw 10 so that the top of the set screw 10 is pressed against the bottom of the liner 9, making the liner 9 more stable. The liner 9 needs to rotate the impeller 3 during the adjustment process, and the rotation of the impeller 3 must be free of any obstacles to avoid the liner 9 being fixed without confirmation, which may affect the operation of the impeller 3. At the same time, when the liner 9 moves, the circular ring a7 on the bottom cover 11 is always in contact with the outer wall of the liner 9, so that the sealing of the liner 9 is not affected when it moves, and the circular ring b8 ensures the sealing of the connection between the volute 6 and the bottom cover 11.

[0029] Working principle: During installation, the impeller 3 is installed on the output shaft of the motor component 1, and matched with the key a2 on the output shaft. There is a hexagon socket screw a5 at the bottom of the impeller 3, which is used to connect the impeller 3 and the motor component 1 to fix the impeller 3. The key a2 is used as a circumferential fixation between the output shaft and the impeller 3 to transmit torque. The bottom of the motor component 1 connects the volute 6 with the motor component 1 through bolts, and the impeller 3 is located inside the volute 6. The bottom cover 11 is also fixed to the bottom of the volute 6 by bolts;

[0030] The liner 9 at the stop of the bottom cover 11 is movably connected with it. When installing for the first time, first place the top of the liner 9 against the impeller 3, and loosen the set screw 10 so that the liner 9 has a certain downward movement space. At this time, the liner 9 is in a movable state, and then insert the hexagon socket screw b12 into the bottom of the liner 9 and slowly tighten it to connect the liner 9 with the bottom cover 11. During the process of tightening the hexagon socket screw b12, rotate the impeller 3. When the impeller 3 rotates without any obstruction, tighten the set screw 10 again to make its top and liner 9 The bottom is pressed tightly, and when the hexagon socket screw b12 is tightened, there is a downward pulling force on the lining plate 9, and when the set screw 10 is pressed against the lining plate 9, there is an upward pushing force on the lining plate 9, thereby making the lining plate 9 more stable; when it is necessary to adjust the gap between the impeller 3 and the lining plate 9, first remove the hexagon socket screw b12, then loosen the set screw 10, so that the lining plate 9 is in a movable state again, determine the position of the lining plate 9 according to the needs, and fix it with the hexagon socket screw b12, and finally tighten the set screw 10 to tighten the lining plate 9.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A submersible pump impeller clearance adjustment mechanism, comprising a motor component (1) and a key a (2), wherein the key a (2) is fixedly connected to the outer wall of the output shaft at the bottom of the motor component (1), and the key a (2) is externally clamped with an impeller (3), characterized in that: Also includes: A lining plate (9) is assembled to be movably connected to the bottom of the impeller (3), and the gap between the lining plate (9) and the impeller (3) can be changed by adjusting the position of the lining plate (9); A set screw (10) is assembled to be movably connected to the bottom of the lining plate (9), and the state of the lining plate (9) can be changed by adjusting the rotation degree of the set screw (10); The hexagon socket screw b (12) is configured to fix the connection between the bottom cover (11) located at the bottom of the impeller (3) and the lining plate (9). When the set screw (10) is loosened, it is inserted into the bottom of the lining plate (9) and slowly tightened. The position of the lining plate (9) is determined and fixed according to the rotation of the impeller (3).

2. A submersible pump impeller clearance adjustment mechanism according to claim 1, characterized in that: A washer (4) and a hexagon socket screw a (5) are provided at the bottom of the impeller (3); the hexagon socket screw a (5) passes through the washer (4) and is threadedly connected to the motor component (1).

3. A submersible pump impeller clearance adjustment mechanism according to claim 2, characterized in that: The bottom of the motor component (1) is fixedly connected to a volute (6), and the impeller (3) is located inside the volute (6).

4. A submersible pump impeller clearance adjustment mechanism according to claim 3, characterized in that: The bottom cover (11) is located at the bottom of the volute (6), and the bottom cover (11) is fixedly connected to the volute (6) by bolts.

5. The submersible pump impeller clearance adjustment mechanism according to claim 1, characterized in that: The lining plate (9) is movably connected to the stopper at the top of the bottom cover (11), the set screw (10) passes through the bottom cover (11) and is threadedly connected to the bottom cover (11), and the top of the set screw (10) is movably connected to the bottom of the lining plate (9), and the hexagon socket screw b (12) passes through the bottom cover (11) and is threadedly connected to the lining plate (9).

6. A submersible pump impeller clearance adjustment mechanism according to claim 5, characterized in that: A circular ring a (7) and a circular ring b (8) are provided on the top of the bottom cover (11); the circular ring a (7) is in contact with the outer side wall of the liner (9), and the circular ring b (8) is in contact with the bottom side wall of the volute (6).

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