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CN-121993420-A - Anti-seizing system and method for water pump

CN121993420ACN 121993420 ACN121993420 ACN 121993420ACN-121993420-A

Abstract

The application relates to an anti-blocking system and a method for a water pump, wherein the anti-blocking system comprises a blocking rotation detection component, a blocking removal component and a controller, the blocking rotation detection component comprises a current detection element, the current detection element is used for detecting current of a motor, the current detection element is electrically connected with the controller, the blocking removal component comprises a collision block and a collision groove, one of the collision block and the collision groove is arranged on a pump shaft, the other of the collision block and the collision groove is arranged on a movable ring, the collision block is positioned in the collision groove, the width of the collision groove is larger than that of the collision block along the circumferential direction of the pump shaft, and the controller is electrically connected with the motor and is used for controlling the motor shaft of the motor to switch rotation direction according to abnormal current signals fed back by the current detection element so as to enable two sides of the collision block and the collision groove to collide reciprocally. The scheme can automatically obtain the running state of the water pump, and the controller is combined to control the motor in the forward and reverse directions, so that the automatic disengaging of the water pump can be realized under the condition of no shutdown, unmanned adherence is realized, the maintenance-free design is realized, the intelligent disengaging efficiency is higher.

Inventors

  • Lv Kuo
  • TENG RENBO

Assignees

  • 威乐(中国)水泵系统有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1. An anti-seizing system for a water pump, the water pump comprising a mechanical seal assembly (9), a pump shaft (1) and a motor (8) driving the pump shaft (1), wherein the mechanical seal assembly (9) comprises a moving ring (2) and a stationary ring, the moving ring (2) is rotatably sleeved on the pump shaft (1), characterized in that the anti-seizing system comprises a seizing detection assembly, a seizing removal assembly and a controller (7); The clamping rotation detection assembly comprises a current detection element (10), wherein the current detection element (10) is used for detecting the current of the motor (8), and the current detection element (10) is electrically connected with the controller (7); The disengaging assembly comprises a collision block (3) and a collision groove (4), wherein one of the collision block (3) and the collision groove (4) is arranged on the pump shaft (1), the other one of the collision block and the collision groove is arranged on the movable ring (2), the collision block (3) is positioned in the collision groove (4) and is wider than the collision block (3) along the circumferential direction of the pump shaft (1); The controller (7) is electrically connected with the motor (8) and is used for controlling a motor (8) shaft of the motor (8) to switch the rotating direction according to an abnormal current signal fed back by the current detection element (10) so as to enable the two sides of the collision block (3) and the collision groove (4) to collide reciprocally, wherein the abnormal current is locked-rotor current of the motor (8).
  2. 2. Anti-seize system according to claim 1, characterized in that the inner bore wall of the moving ring (2) is provided with a mounting hole (5), the striker (3) being mounted in the mounting hole (5).
  3. 3. Anti-seize system according to claim 2, characterized in that the mounting hole (5) is a blind hole, between the end of the striker (3) and the hole bottom of the mounting hole (5) an elastic element (6) is connected; The collision block (3) stretches out into the collision groove (4) under the action of the elastic force of the elastic piece (6), and the collision block (3) can be completely retracted into the mounting hole (5) when compressing the elastic piece (6).
  4. 4. Anti-seizing system according to claim 1, characterized in that the angle between the two sides of the crash slot (4) in the circumferential direction of the pump shaft (1) and the axis of the pump shaft (1) is 90 degrees to 120 degrees.
  5. 5. Anti-seize system according to claim 1, characterized in that the striker (3) and the striker groove (4) are provided with two or more in the circumferential direction.
  6. 6. Anti-seize system according to claim 1, characterized in that a sealing ring is arranged between the moving ring (2) and the pump shaft (1).
  7. 7. Anti-seize system according to claim 1, characterized in that it further comprises a water sensor (11) for detecting whether the mechanical seal assembly (9) is leaking.
  8. 8. Anti-seize system according to claim 1, characterized in that the terminals of the motor (8) are connected with an electronic change-over switch, which is controlled by the controller (7).
  9. 9. A method for preventing a water pump from being locked, characterized in that the method is executed by the anti-locking system according to any one of claims 1 to 8, and comprises the following steps: S1, clamping rotation detection, starting a motor (8), wherein the motor (8) drives a pump shaft (1) to rotate forwards, a current detection element (10) detects the running current of the motor (8) and feeds the running current back to a controller (7), when a current detection value I is smaller than I1, a step S3 is executed, and when the current detection value I is larger than or equal to I1, a step S2 is executed, wherein I1 is the locked rotation current of the motor (8); s2, card removing circulation, which comprises the following steps: S21, the controller (7) controls the motor (8) to switch the rotation direction, the motor (8) drives the pump shaft (1) to reversely rotate, the running current of the motor (8) is detected through the current detection element (10) and fed back to the controller (7), in a period t, if the current detection value I is larger than I1, the step S23 is executed, if the current detection value I is smaller than I1, whether the current detection value I is smaller than I1 in a period t-nt is judged, if the current detection value I is smaller than I1, the step S3 is executed, and if the current detection value I is larger than I1, the step S22 is executed; S22, a controller (7) controls a motor (8) to switch the rotation direction, the motor (8) drives a pump shaft (1) to rotate forwards, the running current of the motor (8) is detected through a current detection element (10) and fed back to the controller (7), in a period t, if the current detection value I is greater than I1, the step S23 is executed, if the current detection value I is smaller than I1, whether the current detection value I is smaller than I1 in a period t-nt is judged, if the current detection value I is smaller than I1, the step S3 is executed, and if the current detection value I is greater than I1, the step S21 is executed; step S23, stopping the motor; Wherein t=θ/ω, where θ is the maximum angle at which the striker (3) can rotate along the striker (4), in radian, ω is the rotational speed of the motor (8), in radian/sec, and n is greater than 1; S3, normal operation, wherein the controller (7) controls the motor (8) to return to initial steering, and the motor (8) drives the pump shaft (1) to maintain forward rotation.
  10. 10. The anti-stiction method of claim 9, further comprising: s4, detecting failure of the mechanical seal assembly (9), and detecting whether the mechanical seal assembly (9) leaks or not after the water pump is blocked; If no water leakage is detected, continuing to execute the step S3; If water leakage is detected, the machine is stopped to maintain the mechanical sealing assembly (9).

Description

Anti-seizing system and method for water pump Technical Field The application relates to the technical field of water pumps, in particular to an anti-clamping rotation system and method for a water pump. Background The water pump is the machinery that carries liquid or make liquid pressure boost, in order to avoid the liquid leakage, ensure the leakproofness between water pump spiral case and the pump shaft, can install mechanical seal subassembly in the water pump generally, mechanical seal subassembly mainly comprises rotatable sealed moving ring and quiet ring, but at present when the water pump is applied to the pumping of high viscosity liquid, after the water pump shut down, high viscosity liquid glues between mechanical seal's moving ring and quiet ring easily, when leading to the motor to start again, and then the pump shaft can't rotate, and then leads to the water pump unable to start, even burns out the motor. At present, the water pump card is adopted to violently remove the card after changeing, increases the motor moment of torsion promptly, realizes removing the card of water pump through great drive power, and this kind of mode leads to motor current too big and burn out easily to lead to the fact the sealed face of moving ring and quiet ring's inefficacy, also have the mode of carrying out manual maintenance after dismantling the water pump and carry out the card that removes the card of water pump, but this kind of mode not only complex operation, need the water pump shut down moreover, waste time and energy. Disclosure of Invention Based on the above, the invention provides an anti-seizing system and method for a water pump, which are used for solving the problems that in the prior art, after the water pump is seized, a motor is easy to burn out, and maintenance is time-consuming and labor-consuming. In one aspect, the invention provides an anti-seizing system for a water pump, the water pump comprises a mechanical seal assembly, a pump shaft and a motor for driving the pump shaft, wherein the mechanical seal assembly comprises a moving ring and a stationary ring, the moving ring is rotatably sleeved on the pump shaft, and the anti-seizing system comprises a seizing detection assembly, a seizing removal assembly and a controller; the clamping rotation detection assembly comprises a current detection element, wherein the current detection element is used for detecting the current of the motor, and the current detection element is electrically connected with the controller; The disengaging assembly comprises a collision block and a collision groove, one of the collision block and the collision groove is arranged on the pump shaft, the other one of the collision block and the collision groove is arranged on the movable ring, the collision block is positioned in the collision groove, and the width of the collision groove is larger than that of the collision block along the circumferential direction of the pump shaft; the controller is electrically connected with the motor and is used for controlling a motor shaft of the motor to switch the rotating direction according to an abnormal current signal fed back by the current detection element so as to enable the collision block to collide with two sides of the collision groove in a reciprocating manner, wherein the abnormal current is larger than a rated running current interval of the motor. In one embodiment, a mounting hole is formed in the wall of the inner hole of the movable ring, the collision block is mounted in the mounting hole, and the shape of the collision block is matched with that of the mounting hole. In one embodiment, the mounting hole is a blind hole, and an elastic piece is connected between the end part of the collision block and the hole bottom of the mounting hole; The collision block extends into the collision groove under the action of the elastic force of the elastic piece, and the collision block can be completely retracted into the mounting hole when compressing the elastic piece. In one embodiment, the included angle between the two side surfaces of the collision groove along the circumferential direction of the pump shaft and the axial lead of the pump shaft is 90 degrees to 120 degrees. In one embodiment, the striker and the striker groove are provided with two or more in the circumferential direction. In one embodiment, a seal ring is disposed between the moving ring and the pump shaft. In one embodiment, the anti-seize system further comprises a water sensor for detecting whether the mechanical seal assembly leaks. In one embodiment, an electronic reversing switch is connected to the wiring terminal of the motor, and the electronic reversing switch is controlled by the controller. On the other hand, the embodiment of the invention provides an anti-seizing method for a water pump, which is executed by adopting the anti-seizing system of any embodiment, and comprises the following steps: S1, clamping rotation detect