Asymmetric support condensate pump motor vibration balancing device

Abstract

The utility model discloses an asymmetrically-supported condensate pump motor vibration balancing device, and relates to the technical field of condensate pump operation. The system comprises a power frequency power switch, a variable frequency power switch, a # 1 condensate pump motor and a # 2 condensate pump motor, a QF4 power switch is connected in series on a line between the power frequency power switch and the # 1 condensate pump motor, and a QF3 power switch is connected in series on a line between the power frequency power switch and the # 2 condensate pump motor. According to the utility model, the QF4 and QF3 power switches are respectively connected in series with the lines between the power frequency power switch and the first and second condensate pump motors, and the QF6 and QF5 power switches are respectively connected in series with the lines between the variable frequency power switch and the first and second condensate pump motors, so that the independent control of the power frequency power supply and the variable frequency power supply of the first and second condensate pump motors is realized. Therefore, when one condensate pump motor needs to be powered off, the power supply of the other motor does not need to be powered off, and the flexibility and maintainability of equipment operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of condensate pump operation, in particular to an asymmetrically supported vibration balance device for a condensate pump motor. Background Art

[0002] The power supply system of the condensate pump motor is a device used to provide mechanical energy for the condensate pump and plays a crucial role in the steam turbine condenser. It is used for heat exchange cooling: The condensate pump cools the equipment generating heat by circulating and transporting condensate to maintain the normal operating temperature. This includes discharging and cooling the heat from the steam turbine. Condensed steam recovery: In a steam turbine, the steam needs to be condensed into water after leaving the blades so as to enter the boiler again for reheating and conversion into steam. The condensate pump realizes the reuse of the condensed steam by pumping the condensate from the condenser and returning it to the boiler.

[0003] At present, the power supply switch of the condensate pump motor is a power frequency power supply switch that jointly controls the power frequency operating power supply of the #1 and #2 condensate pump motors, and a variable frequency power supply switch that jointly controls the variable frequency power supply of the #1 and #2 condensate pump motors. When any one of the #1 and #2 condensate pump motors needs to be powered off, it is necessary to cut off all the power frequency power supply and variable frequency power supply of the #1 and #2 motors. The power supplies of the #1 and #2 motors cannot be independently powered off, and the power supply systems of the industrial frequency and variable frequency cooling fans of the condensate pump cannot be relatively independent, which affects the normal operation of the equipment during maintenance. Therefore, this application document provides an asymmetrically supported vibration balance device for a condensate pump motor. Content of the Utility Model

[0004] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0005] The asymmetrically supported vibration balance device for a condensate pump motor includes a power frequency power supply switch, a variable frequency power supply switch, a #1 condensate pump motor, and a #2 condensate pump motor. A QF4 power supply switch is connected in series on the line between the power frequency power supply switch and the #1 condensate pump motor, a QF3 power supply switch is connected in series on the line between the power frequency power supply switch and the #2 condensate pump motor, a QF6 power supply switch is connected in series on the line between the variable frequency power supply switch and the #1 condensate pump motor, and a QF5 power supply switch is connected in series on the line between the variable frequency power supply switch and the #2 condensate pump motor. Through the reasonable operation of the QF3 power supply switch, QF4 power supply switch, QF5 power supply switch, and QF6 power supply switch, the switching between the power frequency and variable frequency operating states of the #1 condensate pump motor and the #2 condensate pump motor can be flexibly realized.

[0006] Further, when the QF3 power switch and the QF4 power switch are in the closed state, and the QF5 power switch and the QF6 power switch are in the open state, the #1 condensate pump motor and the #2 condensate pump motor are in the power frequency operation state.

[0007] Further, when the QF5 power switch and the QF6 power switch are in the closed state, and the QF3 power switch and the QF4 power switch are in the open state, the #1 condensate pump motor and the #2 condensate pump motor are in the variable frequency operation state.

[0008] Further, when any two of the QF3 power switch, the QF4 power switch, the QF5 power switch and the QF6 power switch are in the closed state, and the other two switches are in the open state, one of the #1 condensate pump motor and the #2 condensate pump motor is in the power frequency operation state, and the other is in the variable frequency operation state.

[0009] Further, the QF3 power switch, the QF4 power switch, the QF5 power switch and the QF6 power switch respectively and independently control the on-off of the power frequency power supply and the variable frequency power supply of the #1 condensate pump motor and the #2 condensate pump motor.

[0010] Further, it further includes a fan power supply circuit, and the fan power supply circuit is connected to the lower ports of the QF3 power switch and the QF4 power switch. When the QF3 power switch or the QF4 power switch is closed, the fan power supply circuit is turned on to supply power to the fan. When maintaining or powering off the condensate pump motor, the on-off of the fan power supply can be controlled separately.

[0011] Further, a motor circuit breaker is also provided in the circuit to improve the protection performance of the circuit and avoid the risk of overstepping tripping. The motor circuit breaker is provided to quickly cut off the circuit when abnormal conditions such as overcurrent, overload, and short circuit occur in the circuit, so as to protect the motor and other equipment from damage.

[0012] Further, the reasonable operation of the QF3 power switch, the QF4 power switch, the QF5 power switch and the QF6 power switch can flexibly realize the switching between the power frequency and variable frequency operation states of the #1 condensate pump motor and the #2 condensate pump motor.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The utility model realizes the independent control of the industrial frequency power supply and the variable frequency power supply of the #1 and #2 condensate pump motors by respectively connecting the power switches QF4 and QF3 in series on the lines between the industrial frequency power switch and the #1 and #2 condensate pump motors, and respectively connecting the power switches QF6 and QF5 in series on the lines between the variable frequency power switch and the #1 and #2 condensate pump motors. In this way, when power outage operation needs to be carried out on a certain condensate pump motor, it is not necessary to cut off the power supply of the other motor completely, which improves the flexibility and maintainability of the equipment operation.

[0015] By adopting the independent power supply control, the utility model enables the power outage operation to be carried out on a certain condensate pump motor alone during equipment maintenance without affecting the normal operation of the other motor, which helps to reduce the impact of maintenance work on the normal operation of the equipment and improves the convenience and efficiency of maintenance.

[0016] The utility model realizes the relative independence of the cooling fan power supply of the condensate pump motor by connecting the fan power supply circuit to the lower ports of the power switches QF3 and QF4. When the power switch QF3 or QF4 is closed, the fan power supply circuit is turned on to supply power to the fan. In this way, when maintaining or cutting off the power supply of the condensate pump motor, the on-off of the fan power supply can be controlled independently without affecting the normal operation of other equipment, ensuring that the fan can provide cooling for the motor in time when the condensate pump motor is running and preventing the motor from being damaged due to overheating, thus improving the reliability and service life of the equipment. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the #1 condensate pump motor and the #2 condensate pump motor of the utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of the whole utility model; Detailed Embodiment

[0019] To make the objectives, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0020] This application provides an asymmetric support vibration balance device for condensate pump motors, which is mainly used to solve the problems that the power supplies of the #1 and #2 motors cannot be cut off independently, and the industrial frequency and variable frequency cooling fan power supply systems of the condensate pump cannot be relatively independent, affecting the normal operation of the equipment during maintenance, and provides the following technical solutions, which will be described in detail below: Embodiment

[0021] As Figure 1 、 Figure 2As shown, in some embodiments, it includes a power frequency power switch, a variable frequency power switch, a #1 condensate pump motor, and a #2 condensate pump motor. A QF4 power switch is connected in series on the line between the power frequency power switch and the #1 condensate pump motor, and a QF3 power switch is connected in series on the line between the power frequency power switch and the #2 condensate pump motor. A QF6 power switch is connected in series on the line between the variable frequency power switch and the #1 condensate pump motor, and a QF5 power switch is connected in series on the line between the variable frequency power switch and the #2 condensate pump motor. When the QF3 power switch and the QF4 power switch are in the closed state, and the QF5 power switch and the QF6 power switch are in the open state, the #1 condensate pump motor and the #2 condensate pump motor are in the power frequency operation state. When the QF5 power switch and the QF6 power switch are in the closed state, and the QF3 power switch and the QF4 power switch are in the open state, the #1 condensate pump motor and the #2 condensate pump motor are in the variable frequency operation state. When any two of the QF3 power switch, the QF4 power switch, the QF5 power switch, and the QF6 power switch are in the closed state, and the other two switches are in the open state, one of the #1 condensate pump motor and the #2 condensate pump motor is in the power frequency operation state, and the other is in the variable frequency operation state. The QF3 power switch, the QF4 power switch, the QF5 power switch, and the QF6 power switch respectively independently control the on / off of the power frequency power supply and the variable frequency power supply of the #1 condensate pump motor and the #2 condensate pump motor.

[0022] Specifically: By respectively connecting the QF4 and QF3 power switches in series on the lines between the power frequency power switch and the #1 and #2 condensate pump motors, and respectively connecting the QF6 and QF5 power switches in series on the lines between the variable frequency power switch and the #1 and #2 condensate pump motors, independent control of the power frequency power supply and the variable frequency power supply of the #1 and #2 condensate pump motors is achieved. In this way, when a power outage operation needs to be performed on a certain condensate pump motor, it is not necessary to cut off the power supply of the other motor completely, improving the flexibility and maintainability of equipment operation.

[0023] The working principle here is as follows: When the QF3 power switch and the QF4 power switch are in the closed state, while the QF5 power switch and the QF6 power switch are in the open state, the circuit between the industrial frequency power switch and the #1 condensate pump motor and the #2 condensate pump motor is conducting, and the circuit between the variable frequency power switch and the motor is disconnected. At this time, the #1 condensate pump motor and the #2 condensate pump motor are in the industrial frequency operation state, that is, they operate at a fixed industrial frequency, receiving power supply from the industrial frequency power supply. When the QF5 power switch and the QF6 power switch are in the closed state, while the QF3 power switch and the QF4 power switch are in the open state, the circuit between the variable frequency power switch and the #1 condensate pump motor and the #2 condensate pump motor is conducting, and the circuit between the industrial frequency power switch and the motor is disconnected. In this case, the #1 condensate pump motor and the #2 condensate pump motor are in the variable frequency operation state, and they can adjust the operating frequency through the variable frequency power switch according to actual needs to achieve the purpose of energy saving and flexible control. When any two of the QF3 power switch, QF4 power switch, QF5 power switch, and QF6 power switch are in the closed state, while the other two switches are in the open state, one of the #1 condensate pump motor and the #2 condensate pump motor will be connected to the industrial frequency power supply and be in the industrial frequency operation state, and the other will be connected to the variable frequency power supply and be in the variable frequency operation state. In this way, according to the actual working condition requirements, one motor can be flexibly selected to operate at the industrial frequency, and the other motor can operate at the variable frequency to achieve the best operating effect and energy saving requirements. Through the independent control of the four power switches QF3, QF4, QF5, and QF6, the flexible switching and independent on-off of the industrial frequency power supply and the variable frequency power supply of the #1 condensate pump motor and the #2 condensate pump motor can be realized, meeting the operating requirements under different working conditions and improving the operating efficiency and flexibility of the system.

[0024] As Figure 1 , Figure 2 shown, in some embodiments, it further includes a fan power supply circuit. The fan power supply circuit is connected to the lower ports of the QF3 power switch and the QF4 power switch. When the QF3 power switch or the QF4 power switch is closed, the fan power supply circuit is conducting, providing power for the fan. The working principle here is that the QF3 power switch and the QF4 power switch respectively control the industrial frequency power supply of the #2 condensate pump motor and the #1 condensate pump motor. When the QF3 power switch or the QF4 power switch is closed, it means that the corresponding condensate pump motor is connected to the industrial frequency power supply and starts industrial frequency operation. At the same time, since the fan power supply circuit is connected to the lower ports of the QF3 power switch and the QF4 power switch, when the QF3 power switch or the QF4 power switch is closed, the current will also flow through the fan power supply circuit, making it conducting. In this way, the fan can obtain power and start working to provide cooling for the condensate pump motor that is operating at the industrial frequency. Embodiment

[0025] The solution in Embodiment 1 will be further introduced in combination with specific working methods, as described in detail below:

[0026] As Figure 1 、 Figure 2 shown, in some embodiments, a motor circuit breaker is also provided in the circuit to improve the protection performance of the circuit and avoid the risk of overstepping tripping. Through the reasonable operation of QF3 power switch, QF4 power switch, QF5 power switch and QF6 power switch, the switching between the industrial frequency and variable frequency operation states of #1 condensate pump motor and #2 condensate pump motor can be flexibly realized. The working principle here is: the motor circuit breaker is set to quickly cut off the circuit when abnormal conditions such as overcurrent, overload, and short circuit occur in the circuit, protecting the motor and other equipment from damage. It can detect the current and fault conditions in the circuit according to the set parameters. Once the set value is exceeded, it will trigger the circuit breaker to operate and disconnect the circuit, thus avoiding the expansion of the fault and the risk of overstepping tripping. QF3, QF4, QF5 and QF6 power switches respectively control the on and off of the industrial frequency and variable frequency power supplies of #1 and #2 condensate pump motors. When it is necessary to switch the motor to the industrial frequency operation state, the corresponding industrial frequency power switches (such as QF3 and QF4) are closed, and at the same time, the variable frequency power switches (such as QF5 and QF6) are disconnected. In this way, the motor will be connected to the industrial frequency power supply and operate at a fixed industrial frequency. On the contrary, when it is necessary to switch the motor to the variable frequency operation state, the variable frequency power switches (such as QF5 and QF6) are closed, and at the same time, the industrial frequency power switches (such as QF3 and QF4) are disconnected. At this time, the motor will be connected to the variable frequency power supply and can adjust the operation frequency according to actual needs to achieve the purpose of energy saving and flexible control.

[0027] Working step 1: The industrial frequency power switch is connected to the #2 condensate pump motor through the QF3 power switch and to the #1 condensate pump motor through the QF4 power switch; the variable frequency power switch is connected to the #2 condensate pump motor through the QF5 power switch and to the #1 condensate pump motor through the QF6 power switch. When the QF3 and QF4 power switches are closed and the QF5 and QF6 power switches are disconnected, the #1 and #2 condensate pump motors are in the industrial frequency operation state and are powered by the industrial frequency power supply. When the QF5 and QF6 power switches are closed and the QF3 and QF4 power switches are disconnected, the #1 and #2 condensate pump motors are in the variable frequency operation state and are powered by the variable frequency power supply. When any two of the QF3, QF4, QF5 and QF6 power switches are closed and the other two are disconnected, one of the #1 and #2 condensate pump motors is in the industrial frequency operation state and the other is in the variable frequency operation state.

[0028] Working step 2: The fan power circuit is connected to the lower outlets of the QF3 power switch and the QF4 power switch. When the QF3 or QF4 power switch is closed, the corresponding condensate pump motor operates at power frequency. Meanwhile, the fan power circuit is turned on to supply power to the fan, cooling the condensate pump motor operating at power frequency. The motor circuit breaker set in the circuit can quickly cut off the circuit in case of abnormal conditions such as overcurrent, overload, and short circuit in the circuit, avoiding the risk of fault expansion and cascade tripping, and improving the protection performance of the circuit.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Asymmetric support condensate pump motor vibration balancing device, including power frequency power switch, variable frequency power switch, #1 condensate pump motor and #2 condensate pump motor, characterized in that, A QF4 power switch is connected in series on the line between the industrial-frequency power switch and the #1 condensate pump motor, a QF3 power switch is connected in series on the line between the industrial-frequency power switch and the #2 condensate pump motor, a QF6 power switch is connected in series on the line between the variable-frequency power switch and the #1 condensate pump motor, and a QF5 power switch is connected in series on the line between the variable-frequency power switch and the #2 condensate pump motor.

2. The asymmetric support condensate pump motor vibration balance device according to claim 1, characterized in that, When the QF3 power switch and the QF4 power switch are in the closed state, and the QF5 power switch and the QF6 power switch are in the open state, the #1 condensate pump motor and the #2 condensate pump motor are in the industrial-frequency operation state.

3. The asymmetric support condensation pump motor vibration balance device according to claim 1, characterized in that When the QF5 power switch and the QF6 power switch are in the closed state, and the QF3 power switch and the QF4 power switch are in the open state, the #1 condensate pump motor and the #2 condensate pump motor are in the variable-frequency operation state.

4. The asymmetric support condensation water pump motor vibration balancing device according to claim 1, characterized in that, When any two of the QF3 power switch, the QF4 power switch, the QF5 power switch and the QF6 power switch are in the closed state, while the other two are in the open state, one of the #1 condensate pump motor and the #2 condensate pump motor is in the industrial-frequency operation state, and the other is in the variable-frequency operation state.

5. The asymmetric support condensate pump motor vibration balance device according to claim 1, characterized in that, The QF3 power switch, the QF4 power switch, the QF5 power switch and the QF6 power switch respectively independently control the on-off of the industrial-frequency power supply and the variable-frequency power supply of the #1 condensate pump motor and the #2 condensate pump motor.

6. The asymmetric support condensate pump motor vibration balance device according to claim 1, characterized in that, It also includes a fan power supply circuit, and the fan power supply circuit is connected to the lower ports of the QF3 power switch and the QF4 power switch. When the QF3 power switch or the QF4 power switch is closed, the fan power supply circuit is turned on to provide power for the fan.

7. The asymmetric support condensate pump motor vibration balancing device according to claim 1, characterized in that, A motor circuit breaker is also provided in the circuit to improve the protection performance of the circuit and avoid the risk of overstepping tripping.

8. The asymmetric support condensation water pump motor vibration balance device according to claim 1, characterized in that, The reasonable operation of the QF3 power switch, the QF4 power switch, the QF5 power switch and the QF6 power switch can flexibly realize the switching between the industrial-frequency and variable-frequency operation states of the #1 condensate pump motor and the #2 condensate pump motor.

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