JP2665997B2 - Pump operating condition detection method and lubricating water supply method for pump bearings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting an operating state of a pump and a method for supplying lubricating water to a bearing of the pump.

[0002]

2. Description of the Related Art For example, as a bearing for a vertical shaft pump, a ceramic bearing capable of performing stable operation by lubricating and cooling by self-lifting water is employed. In this type of bearing, after a very short time has elapsed immediately after the start of the pump, the bearing is immediately lubricated and cooled by self-lifting water and enters a stable operation. That is, since the dry operation is limited to a short time, wear and seizure of the ceramic bearings can be avoided and stable operation can be performed.

On the other hand, with the rapid progress of urbanization, the amount of rainwater flowing into drainage stations installed in waterways has become large and rapid. In such a situation, even if the water level of the water intake well at the drainage station falls to the pumping interruption water level of the vertical shaft pump, the dry operation is continued, and the preliminary standby operation or the air management operation that precedes the operation state of the pump is performed. It responds by doing. In the vertical shaft pump used for the preliminary standby operation or the air management operation, the dry operation is performed for a long time, and during this time, lubricating water is not supplied to the bearing. Therefore, a ceramic bearing whose dry operation is limited to a short time could not be adopted for the vertical shaft pump that performs the preliminary standby operation or the air management operation.

As a means for solving such a problem, it is conceivable to supply lubricating water to the bearing from the outside. In this case, although the pumping operation (draining operation) is being performed, the lubricating water is supplied from the outside. It is pointless to continue supplying lubricating water. Therefore, by measuring the water level of the water intake well, if the water level is lower than the preset water level, that is, if the water level is lower than the pumping start water level of the vertical shaft pump, lubricating water is supplied to the bearing. The method of supplying the water was adopted. However, in such a method of supplying the lubricating water to the bearing based on the water level of the water absorption well, it is necessary to consider the case where the water surface of the water absorption well is calm and the case where the water surface is wavy. In consideration of the above case, it is necessary to set the lubrication water supply stop water level high enough to allow for a margin.

However, in such a control method, when the water surface is relatively calm, lubricating water is supplied even though the pumping operation is being performed. That is, since the operating state of the pump cannot be accurately detected, useless supply of lubricating water is performed.

[0006]

The problems to be solved are that the operating condition of the pump cannot be detected accurately and that the operating condition of the pump cannot be detected accurately. The point is that useless lubricating water is supplied.

[0007] Accordingly, the present invention provides a pump in which the pump is operated in a regular drainage operation.
Status, air / water mixed operation status or airborne operation status
Being able to accurately detect whether the vehicle is in a driving situation
The main purpose is to operate the pump, and the other
Lubrication water supply to bearings based on accurate detection of the situation
Is to be able to eliminate waste.

[0008]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above main object.
In order, the invention of claim 1, at least one of detected by the characteristic detecting unit noise characteristics or vibration characteristics, the pump and the peripheral to enter a judgment means the detected characteristic signal of the pump and the pump peripherals the operating conditions of the pump on the basis of the noise characteristics or vibration characteristics are determined by the operating state of the apparatus, normal water-discharge operation conditions, steam mixed luck
Rolling situation, and it is characterized in that so as to detect and determine which one of the gas in the operating conditions.

According to another aspect of the present invention, a noise detecting or vibration characteristic of at least one of a pump and a pump peripheral device is detected by a characteristic detecting means, and a detected characteristic signal is obtained. Based on the noise characteristics or vibration characteristics determined by the operation state of the pump and peripheral devices input to the determination means, the operation status of the pump is changed to the normal drainage operation status, the gas-water mixing operation status, and the in-air operation.
Judgment and detection of any of the situations
Stops the supply of lubricating water from the lubricating water supply system to the bearings of the pump main shaft when the running condition and the gas-water mixing operation condition are detected.
The lubricating water supply system
Supply lubricating water to the bearing of the pump main shaft from
Der which comprises carrying out the lubrication water supply stop control
You.

[0010]

According to the first aspect of the present invention, the noise characteristic or the vibration characteristic of at least one of the pump and the pump peripheral device can be detected by the characteristic detecting means. On the other hand, the operating state of the pump and the noise characteristics or vibration characteristics of the pump and peripheral devices have a certain relationship. Therefore, the characteristic signal detected by the characteristic detecting unit is input to the determining unit, and the determining unit determines the current operating state of the pump based on the noise characteristic or the vibration characteristic determined by the operating state of the pump and the peripheral device . is there a drainage operation conditions of normal, whether in the steam-water mixing driving conditions, or there care during operating conditions
Thus, it is possible to accurately determine the current operating state of the pump by clearly determining whether the pump is operating . Note that the normal drainage operation is an operation state in which a predetermined drainage amount is secured without sucking air from an intake pipe.

[0011] According to the second aspect of the invention, the billing
As in the first aspect of the invention, the current operating condition of the pump can be accurately detected by judging the characteristic signal detected by the characteristic detecting means.
Out on the basis of the detection result, at the time of detection of the drainage operation like status Oyo <br/> beauty steam mixed operation like status of normal stops supplying the lubricating water, and, at the time of detection of the air operation like status lubricating water Supply
By controlling, during normal drainage operation and mixed air-water operation
Waste supply and consumption of lubrication water during rolling
It is possible to save power.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration diagram of a vertical shaft pump to which the present invention is applied. The main shaft 2 of the pump 1 is substantially equivalent to a bearing 5 fixed to a base of a guide vane 4 above an impeller 3 and a floor surface 7 of a water absorption well 6. is rotatably supported by a bearing 8 fixed at the same height level, it is rotationally driven by a drive source 9, such as a motor or an engine. The bearings 5 and 8 are each formed of a ceramic such as silicon carbide, and lubricating water for lubrication and cooling is supplied from a lubricating water supply system 10 to each. The lubricating water supply system 10 includes a lubricating water supply source 10A,
A pipeline 10B for supplying lubricating water from 0A to the bearings 5, 8;
It is constituted by a valve 10C such as an electromagnetic valve or an electric ball valve provided in the pipe 10B. Therefore, valve 10
When the valve C is opened, the lubricating water is supplied from the lubricating water supply source 10A to the bearings 5 and 8, and when the valve 10C is closed, the supply of the lubricating water to the bearings 5 and 8 is stopped . Further, an intake pipe 11 is provided below the impeller 3, that is, the intake pipe 11 for communicating the inlet of the impeller 3 with the atmosphere.

On the other hand, the detection sensor 12a of the characteristic detecting means 12 for detecting noise characteristics such as a noise value and a noise frequency characteristic of the pump 1 or vibration characteristics such as a vibration value and a vibration frequency characteristic.
Is provided near the pump 1. The characteristic signal detected by the characteristic detecting means 12 is input to the judging means 13. The determining means 13 supplies a noise value determined by the setting device 14 based on operating conditions such as a normal drainage operation, a gas-water mixing operation, and an air operation of the pump 1 (see the horizontal axis area A in FIGS. 2 to 4). ) A signal is input. The judging means 13 operates the pump 1 based on the noise value signal at the time of normal drainage operation, the noise value signal at the time of gas-water mixing operation, and the noise value signal at the time of air operation inputted from the setting device 14, that is, The operation state such as the normal drainage operation, the gas-water mixing operation, and the in-air operation is determined. When the operation state is determined to be the normal drainage operation, a closing signal Sh for closing the valve 10C is output and the first display is performed. A display signal is output to the heater 15 to display the normal drainage operation state, and when it is determined that the operation state is the air / water mixing operation, a closing signal Sh for closing the valve 10C.
And the display signal is output to the second display 16 to indicate the gas-water mixing operation. Further, when it is determined that the driving condition is the air-driving operation, a valve-opening signal 0p for opening the valve 10C is output and a display signal is output to the third display 17 to indicate the air-driving operation.

Next, a method of detecting the operating condition of the vertical shaft pump and a method of supplying lubricating water to the bearings 5 and 8 will be described. The operating condition of the pump 1 and the noise value have a certain relationship depending on the operating condition of the pump 1 as described above. That is, even if a suction negative pressure generated at the inlet (the impeller chamber) of the impeller 3 by operating the pump with the water level of the water absorption well 6 is applied to the intake pipe 11, no air is sucked from the intake pipe 11. When the level is equal to or higher than the level WL1, a normal drainage operation is performed, a noise having a value corresponding to the horizontal axis region A in FIG. 2 is generated, the water level of the water intake well 6 is reduced, and air is sucked into the intake pipe 11. In the region where the level decreases to the level WL2, the drainage operation is performed while sucking air by the suction negative pressure generated at the entrance of the impeller 3. During such a gas-water mixing operation, noise having a value corresponding to the horizontal axis area A in FIG. 3 is generated. In addition, when the water level of the water intake well 6 drops below the level WL2, the pumping is interrupted, and only air is sucked by the suction negative pressure generated at the inlet of the impeller 3, the in-air operation of FIG. Noise of a value corresponding to the area A is generated. Therefore, when the pump 1 is in the normal drainage operation, noise having a value corresponding to the horizontal axis area A in FIG. 2 is detected by the characteristic detecting means 12 via the detection sensor 12a,
The detection signal is input to the judgment means 13. Judgment means 1
In 3, based on the noise value signal during pumping operation input from the setting device 14, it is determined that the input signal from the characteristic detecting means 12 is the noise value during pumping operation of the pump 1, and the valve 10
And outputs a closing signal Sh for closing C.
A display signal is output to the display 15 to detect the pumping operation state of the pump 1. In this case, the bearings 5, 8 are lubricated and cooled by the self-pumping water drawn by the impeller 3.

On the other hand, when the pump 1 is in the gas-water mixing operation, noise having a value corresponding to the horizontal axis region A in FIG. 3 is detected by the characteristic detecting means 12 via the detecting sensor 12a, and the detection signal is determined. Input to the means 13. Judgment means 13
Then, it is determined that the input signal from the characteristic detecting means 12 is a noise value during the gas-water mixing operation of the pump 1 based on the noise value signal during the gas-water mixing operation input from the setting device 14,
A closing signal Sh for closing the valve 10C is output, and a display signal is output to the second display 16 to detect a gas-water mixing operation state of the pump 1. In this case, the bearings 5, 8 are lubricated and cooled by the self-pumping water drawn by the impeller 3.

On the other hand, when the pump 1 is operating in the air, noise having a value corresponding to the horizontal axis region A in FIG.
The detection signal is detected by the characteristic detecting means 12 via the, and the detection signal is input to the judging means 13. In the judging means 13, an input signal from the characteristic detecting means 12 is provided based on the noise value signal at the time of the in-air operation inputted from the setting device 14.
Is determined to be the noise value at the time of the in-air operation, the valve opening signal Op for opening the valve 10C is output, and the third display 1
7, a display signal is output to detect the in-air operation state of the pump 1. By opening the valve 10C, lubricating water is supplied from the lubricating water supply source 10A to the bearings 5, 8,
Lubrication and cooling of the bearings 5, 8 are performed.

As described above, the lubricating water supplied from the lubricating water supply source 10A lubricates and cools the bearings 5 and 8 during the in-air operation of the pump 1, so that the dry operation is continued for a long time. The ceramic bearings 5 and 8 can also be used for the vertical pump 1 that performs the standby operation and the air management operation.

In the above-described embodiment, the detection sensor 12a of the characteristic detecting means 12 is provided near the pump 1 to detect the noise value of the pump. A noise sensor may be detected by providing a detection sensor 12a of the characteristic detecting means 12 in the vicinity. Further, a detection sensor 12a of the characteristic detecting means 12 may be provided near both the pump 1 and the pump peripheral device to detect a noise value. Of course, instead of the detection of the noise value described in the above embodiment, the noise frequency characteristic shown in the horizontal axis region B in FIGS. 2 to 4 or the vibration characteristic such as the vibration value or the vibration frequency characteristic is detected by the characteristic detecting means 12. Detected by the sensor 12a and input to the determination means 13, where the pump 1
Normal drainage operation of the steam-water mixing operation, to determine the operating conditions based on the vibration characteristic signal noise and frequency characteristics or vibration value or oscillation frequency characteristic is determined by the operating <br/> like status, such as in the gas operation In the same manner as described above, a signal corresponding to the operating condition may be output to open / close the valve 10C and display the first to third indicators 15, 16, and 17. Further, by learning the noise characteristics or vibration characteristics setter 14 and detected by the characteristics detection means 12 using a computer having an AI function may be determined operation like status. It is needless to say that the present invention is not limited to the vertical shaft pump 1 described in the above embodiment, but may be applied to other pumps capable of performing aerial operation.

[0019]

As described above, according to the first aspect of the present invention, the present pump is based on the noise characteristic or vibration characteristic of at least one of the pump and the pump peripheral equipment which has a certain relation with the operation state of the pump. Whether the operation status of the vehicle is in the normal drainage operation status, the gas-water mixing operation status,
Pong clearly determine whether or not there's a certain live aerial operation situation
Effect that the operating conditions of the flop can be accurately detected
To play.

According to the second aspect of the present invention, the above-mentioned claim is provided.
In the same manner as in the first invention, an accurate
Based on the detection result, at the time of the drainage operation and during the steam-water mixing operation legitimate can be lubricated and cooled the bearing by its own pumping stops the supply of the lubricating water, and, bearing by its own pumping lubrication and cooling not possible to during the time of operation gas, by performing the control for supplying lubricating water to the bearing, yet can be employed in the ceramic <br/> box bearings as the bearing of the pump for the previous row standby operation or aerial administration operation normal During drain operation and
Supply of lubricating water during
Of saving power consumption for
To play .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a vertical shaft pump to which an embodiment of the present invention is applied.

FIG. 2 is a graph showing noise measurement results during normal drainage operation.

FIG. 3 is a graph showing noise measurement results during the air / water mixing operation.

FIG. 4 is a graph showing a result of noise measurement during in-air operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump 2 Main shaft 5 Bearing 8 Bearing 9 Peripheral equipment (pump drive source) 10 Lubricating water supply system 12 Characteristic detection means 13 Judgment means

Claims (2)

(57) [Claims] 1. A detecting at least one of the noise characteristics or the vibration characteristics of the pump and the pump peripherals by the characteristics detection means, determined by the operating state of the pump and peripherals to enter a judgment means the detected characteristic signal Based on the noise or vibration characteristics used, the operation status of the pump can be changed to the normal drainage operation status,
Operating condition detecting method of the pump, characterized in that so as to detect and determine which of the rolling conditions. 2. The noise characteristic or the vibration characteristic of at least one of the pump and the pump peripheral device is detected by a characteristic detecting unit, and the detected characteristic signal is inputted to a judging unit to be determined by the operation state of the pump and the peripheral device. Based on the noise characteristics or vibration characteristics of the pump, the operation status of the pump can be changed to the normal drainage operation status,
Judgment and detection of any of the situations
Stops the supply of lubricating water from the lubricating water supply system to the bearings of the pump main shaft when the running condition and the gas-water mixing operation condition are detected.
The lubricating water supply system
Supply lubricating water to the bearing of the pump main shaft from
A method for supplying lubricating water to a bearing of a pump, wherein lubricating water supply stop control is performed .