Centrifugal pump capable of reducing impeller unbalance phenomenon

Abstract

The utility model relates to a centrifugal pump capable of reducing the impeller unbalance phenomenon, and relates to the technical field of centrifugal pumps, the centrifugal pump comprises a control console, a motor, a bearing, a transmission shaft, an impeller and a pump shell, the lower end of the motor is fixedly connected with a bottom plate, and a balance sensor used for detecting the rotation balance of the shaft is arranged between the impeller and the bearing; the balance sensor is installed on the transmission shaft, the balance sensor is electrically connected with the console, a sealing shell is arranged outside the balance sensor, the transmission shaft penetrates through the sealing shell and is rotationally connected with the sealing shell, and a sealing mechanism used for fixing and sealing the connecting position of the sealing shell and the bottom plate is arranged between the sealing shell and the bottom plate. A limiting assembly used for limiting rotation of the transmission shaft is arranged in the sealing shell. The centrifugal pump has the effect that the situation that the service life of the centrifugal pump is affected due to impeller unbalance is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of centrifugal pumps, and in particular to a centrifugal pump capable of reducing the occurrence of impeller imbalance. Background Art

[0002] As a liquid delivery pump with simple structure and reliable performance, centrifugal pump is now widely used in all aspects of production and life. The basic structure of centrifugal pump includes pump casing, rotating shaft, impeller, shaft sleeve and shaft seal device.

[0003] The centrifugal pump in the prior art may have an unbalanced impeller. The unbalanced impeller of a centrifugal pump refers to the uneven distribution of the mass of the impeller, which results in unbalanced forces when the pump is running. This imbalance may be caused by factors such as errors in the manufacturing process, material inhomogeneity, wear caused by long-term use, or impurities accumulated on the impeller.

[0004] Impeller imbalance can cause unstable pump operation, vibration and noise, and may reduce pump performance and life. When the impeller is unbalanced, the pump's operating efficiency will be reduced, and in severe cases, it may cause mechanical damage, affecting the service life of the centrifugal pump. Utility Model Content

[0005] In order to reduce the occurrence of impeller imbalance and thus reduce the service life of the centrifugal pump, the present application provides a centrifugal pump that can reduce the occurrence of impeller imbalance.

[0006] The present application provides a centrifugal pump that can reduce the occurrence of impeller imbalance, which adopts the following technical solution:

[0007] A centrifugal pump capable of reducing the occurrence of impeller imbalance comprises a control console, a motor, a bearing, a transmission shaft, an impeller and a pump casing, wherein a bottom plate is fixedly connected to the lower end of the motor, a balance sensor for detecting shaft rotation balance is arranged between the impeller and the bearing, the balance sensor is mounted on the transmission shaft, the balance sensor is electrically connected to the control console, a sealing shell is arranged outside the balance sensor, the transmission shaft passes through the sealing shell and is rotationally connected to the sealing shell, a sealing mechanism for fixing and sealing the connection between the sealing shell and the bottom plate is arranged between the sealing shell and the bottom plate, and a limiting component for limiting the rotation of the transmission shaft is arranged inside the sealing shell.

[0008] By adopting the above technical solution, when abnormal rotation that is about to cause the impeller to be unbalanced occurs in the transmission, the balance sensor will quickly send an electrical signal to the control console, causing the control console to stop the rotation of the motor, and limit the rotation of the transmission shaft through the limiting component, so that the impeller stops rotating quickly. In this way, the operation of the centrifugal pump is quickly stopped, which can greatly reduce the occurrence of impeller imbalance, the unstable operation of the pump caused by impeller imbalance, and greatly reduce the subsequent maintenance costs.

[0009] Optionally, the limiting assembly includes a mounting ring and a locking block, the transmission shaft passes through the mounting ring and is rotatably connected to the mounting ring, the mounting ring is fixed in the sealing shell, a sliding hole is provided on the mounting ring, the locking block is slidably connected in the sliding hole, and a driving member is provided in the sealing shell for driving the locking block to press against the transmission shaft or away from the transmission shaft.

[0010] By adopting the above technical solution, the driving member can be used to drive the locking block to move, so that the locking block is pressed against the arc-shaped side wall of the transmission shaft, thereby quickly limiting the rotation of the transmission shaft.

[0011] Optionally, the driving member is configured as an electric telescopic rod, the locking block is fixedly connected to the telescopic end of the electric telescopic rod, and the electric telescopic rod is electrically connected to the console.

[0012] By adopting the above technical solution, the extension and retraction of the electric telescopic rod can be controlled by the console, and the position of the locking block can be quickly changed.

[0013] Optionally, the locking block is configured to have a side facing the transmission shaft in an arc shape that matches the arc-shaped side wall of the transmission shaft.

[0014] By adopting the above technical solution, the arc-shaped outer portion of the locking block can increase the contact area between the locking block and the transmission shaft.

[0015] Optionally, the sealing mechanism includes a waterproof shell, which covers the outside of the sealing shell. A plurality of sealing strips are provided at one end of the waterproof shell close to the bottom plate, and the sealing strips press the end of the waterproof shell against the bottom plate. A fixing component for fixing the two is provided between the sealing strip and the bottom plate.

[0016] By adopting the above technical scheme, the sealing shell and the joint between the sealing shell and the bottom plate can be sealed through the waterproof shell. At the same time, the joint between the sealing shell and the bottom plate can be sealed and waterproofed through the sealing strip, further improving the sealing effect of the waterproof shell.

[0017] Optionally, the fixing assembly includes a plurality of fixing bolts, the fixing bolts are threadedly connected to the sealing strip, and the rods of the fixing bolts pass through the sealing strip and the waterproof housing and are threadedly connected to the base plate.

[0018] By adopting the above technical solution, the rod of the fixing bolt can be separated from the bottom plate by rotating the fixing bolt, thereby the waterproof shell can be replaced regularly.

[0019] Optionally, a water stop groove is provided on the bottom plate facing the sealing strip, and the sealing strip presses the waterproof shell tightly into the water stop groove.

[0020] By adopting the above technical solution, the penetration of water flow can be limited by the water stop groove and the position of the sealing strip can be limited at the same time, thereby improving the stability of the sealing strip on the bottom plate.

[0021] Optionally, a protective plate is provided outside the sealing shell, and the protective plate is fixedly connected to the bottom plate.

[0022] By adopting the above technical solution, the sealing shell can be protected by the protective plate, thereby playing a protective role for the sealing shell.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The centrifugal pump can be stopped quickly, which can greatly reduce the occurrence of impeller imbalance, and the unstable operation of the pump caused by impeller imbalance, and also greatly reduce the subsequent maintenance costs;

[0025] 2. The sealing shell and the joint between the sealing shell and the bottom plate can be sealed by the waterproof shell, and the joint between the sealing shell and the bottom plate can be sealed and water-stopped by the sealing strip, further improving the sealing effect of the waterproof shell on the seal;

[0026] 3. The water stop groove can limit the penetration of water flow and at the same time limit the position of the sealing strip, thereby improving the stability of the sealing strip on the base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 It is a schematic structural diagram of a water stop groove of an embodiment of the present application;

[0029] Figure 3 is a schematic diagram of the structure of a balance sensor behind a hidden protective plate according to an embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of the structure of the restriction component of an embodiment of the present application.

[0031] In the figure, 1. motor; 2. bearing; 3. transmission shaft; 4. protective plate; 5. pump housing; 6. bottom plate; 61. water stop groove; 7. balance sensor; 8. sealing shell; 9. sealing mechanism; 91. waterproof shell; 92. sealing strip; 93. fixing assembly; 931. fixing bolt; 10. limiting assembly; 101. mounting ring; 1011. sliding hole; 102. locking block; 103. driving member. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 -Attached Figure 2 , further details of this application are given.

[0033] The embodiment of the present application is: a centrifugal pump capable of reducing the occurrence of impeller imbalance, referring to Figure 1 , including a control console, a motor 1, a bearing 2, a transmission shaft 3, an impeller and a pump housing 5. The output shaft of the motor 1 is coaxially arranged and fixedly connected with the bearing 2, the transmission shaft 3 is coaxially arranged and fixedly connected with the bearing 2, the impeller is installed in the pump housing 5 and the impeller is fixedly connected to the end of the transmission shaft 3 away from the motor 1, and the motor 1 is electrically connected to the control console. The control console and the impeller are not drawn in the figure.

[0034] The bottom end of the motor 1 is fixedly connected with a bottom plate 6, which is set in a rectangular parallelepiped shape. A balance sensor 7 for detecting the rotation balance of the transmission shaft 3 is provided between the impeller and the bearing 2. The balance sensor 7 is installed on the transmission shaft 3, and the balance sensor 7 is fixedly connected to the bottom plate 6. The balance sensor 7 is electrically connected to the control console.

[0035] Reference Figure 1 , Figure 2 and Figure 3 A sealing shell 8 is provided outside the balance sensor 7, and the sealing shell 8 seals the balance sensor 7 inside the sealing shell 8. The sealing shell 8 is placed on the upper end of the bottom plate 6, and the transmission shaft 3 passes through the sealing shell 8 and is rotatably connected to the sealing shell 8. A protective plate 4 is provided outside the sealing shell 8, and the protective plate 4 is arranged in an arc shape, and the protective plate 4 is fixedly connected to the upper end surface of the bottom plate 6 by bolts.

[0036] A sealing mechanism 9 is provided between the sealing shell 8 and the bottom plate 6 for fixing and sealing the connection between the two.

[0037] The sealing mechanism 9 includes a waterproof housing 91, which covers and is fixedly connected to the outside of the sealing shell 8. Four sealing strips 92 are provided at one end of the waterproof housing 91 close to the bottom plate 6. A water stop groove 61 is provided on the bottom plate 6 facing the sealing strips 92. The sealing strips 92 press the waterproof housing 91 tightly into the water stop groove 61. A fixing assembly 93 for fixing the sealing strips 92 and the bottom plate 6 is provided between the sealing strips 92 and the bottom plate 6.

[0038] The fixing assembly 93 includes a plurality of fixing bolts 931 , which are threadedly connected to the sealing strip 92 and two fixing bolts 931 are arranged on each sealing strip 92 . The rod of the fixing bolt 931 passes through the sealing strip 92 and the waterproof shell 91 and is threadedly connected to the base plate 6 .

[0039] Thus, by rotating the fixing bolt 931 , the rod of the fixing bolt 931 can be separated from the sealing strip 92 , and then the waterproof housing 91 can be disassembled from the bottom plate 6 , and then the balance sensor 7 in the waterproof housing 91 can be maintained on a daily basis.

[0040] Reference Figure 2 and Figure 4A limiting assembly 10 for limiting the rotation of the transmission shaft 3 is provided in the sealing shell 8. The limiting assembly 10 includes a mounting ring 101 and a locking block 102. The mounting ring 101 is coaxially arranged with the transmission shaft 3. The transmission shaft 3 passes through the mounting ring 101 and is rotatably connected to the mounting ring 101. The mounting ring 101 is fixedly connected in the sealing shell 8.

[0041] A sliding hole 1011 is provided on the outer arc surface of the mounting ring 101, and the locking block 102 is slidably connected in the sliding hole 1011. In order to increase the contact area between the locking block 102 and the transmission shaft 3, the side of the locking block 102 facing the transmission shaft 3 is set to an arc shape that matches the arc-shaped side wall of the transmission shaft 3. A driving member 103 is provided in the sealing shell 8 for driving the locking block 102 to press against the transmission shaft 3 or to move away from the transmission shaft 3.

[0042] In this embodiment, the driving member 103 is configured as an electric telescopic rod, which is fixedly connected to the bottom plate 6 , and the outer arc surface of the locking block 102 is fixedly connected to the telescopic end of the electric telescopic rod, which is electrically connected to the control console.

[0043] The implementation principle of the embodiment of the present application is as follows: when abnormal rotation that is about to cause the impeller to be unbalanced occurs during transmission, the balance sensor 7 will quickly send an electrical signal to the control console, causing the control console to send an electrical signal to the motor 1, causing the motor 1 to stop rotating, and at the same time controlling the electric telescopic lever to extend, causing the electric telescopic lever to drive the locking block 102 to move to one side of the transmission shaft 3 and abut against the transmission shaft 3, thereby quickly limiting the rotation of the transmission shaft 3 and causing the impeller to quickly stop rotating. This will quickly stop the operation of the centrifugal pump.

[0044] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A centrifugal pump capable of reducing the occurrence of impeller imbalance, comprising a control console, a motor (1), a bearing (2), a transmission shaft (3), an impeller and a pump casing (5), characterized in that: A bottom plate (6) is fixedly connected to the lower end of the motor (1); a balance sensor (7) for detecting whether the rotation of the transmission shaft (3) is balanced is provided between the impeller and the bearing (2); the balance sensor (7) is mounted on the transmission shaft (3); the balance sensor (7) is electrically connected to a control console; a sealing shell (8) is provided outside the balance sensor (7); the transmission shaft (3) passes through the sealing shell (8) and is rotationally connected to the sealing shell (8); a sealing mechanism (9) for fixing and sealing a connection between the sealing shell (8) and the bottom plate (6) is provided between the sealing shell (8) and the bottom plate (6); a limiting component (10) for limiting the rotation of the transmission shaft (3) is provided inside the sealing shell (8).

2. A centrifugal pump capable of reducing the occurrence of impeller imbalance according to claim 1, characterized in that: The limiting assembly (10) comprises a mounting ring (101) and a locking block (102); the transmission shaft (3) passes through the mounting ring (101) and is rotatably connected to the mounting ring (101); the mounting ring (101) is fixedly connected to the sealing shell (8); a sliding hole (1011) is provided on the mounting ring (101); the locking block (102) is slidably connected to the sliding hole (1011); and a driving member (103) is provided in the sealing shell (8) for driving the locking block (102) to press against the transmission shaft (3) or to move away from the transmission shaft (3).

3. A centrifugal pump capable of reducing the occurrence of impeller imbalance according to claim 2, characterized in that: The driving member (103) is configured as an electric telescopic rod, the locking block (102) is fixedly connected to the telescopic end of the electric telescopic rod, and the electric telescopic rod is electrically connected to the control console.

4. A centrifugal pump capable of reducing the occurrence of impeller imbalance according to claim 3, characterized in that: The side of the locking block (102) facing the transmission shaft (3) is arranged in an arc shape that matches the arc-shaped side wall of the transmission shaft (3).

5. A centrifugal pump capable of reducing the occurrence of impeller imbalance according to claim 1, characterized in that: The sealing mechanism (9) comprises a waterproof shell (91), the waterproof shell (91) covers and is fixed to the outside of the sealing shell (8), a plurality of sealing strips (92) are provided at one end of the waterproof shell (91) close to the bottom plate (6), the sealing strips (92) press the end of the waterproof shell (91) against the bottom plate (6), and a fixing component (93) for fixing the sealing strips (92) and the bottom plate (6) is provided between the sealing strips (92) and the bottom plate (6).

6. A centrifugal pump capable of reducing the occurrence of impeller imbalance according to claim 5, characterized in that: The fixing assembly (93) comprises a plurality of fixing bolts (931), wherein the fixing bolts (931) are threadedly connected to the sealing strip (92), and the stems of the fixing bolts (931) pass through the sealing strip (92) and the waterproof housing (91) and are threadedly connected to the bottom plate (6).

7. A centrifugal pump capable of reducing the occurrence of impeller imbalance according to claim 6, characterized in that: A water stop groove (61) is provided on the bottom plate (6) facing the sealing strip (92), and the sealing strip (92) presses the waterproof housing (91) tightly into the water stop groove (61).

8. A centrifugal pump capable of reducing the occurrence of impeller imbalance according to claim 1, characterized in that: A protective plate (4) is provided outside the sealing shell (8), and the protective plate (4) is fixedly connected to the bottom plate (6).

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