JP2002221183A - Control method of movable blade pump and control device of movable blade pump - Google Patents

Abstract

(57) [Problem] To provide a control method of a movable vane pump capable of automatically removing foreign matter caught between an impeller vane and a casing liner. SOLUTION: A casing liner 1a having an inner surface formed with a concave groove 1e for adjusting a flow rate, and an impeller vane rotatably housed in the casing liner 1a and having a blade 4a whose angle can be adjusted by an impeller vane driving means 2. 4 is a method for controlling the movable blade pump, the blade angle of the impeller vane 4 being substantially parallel to the concave groove 1e in a state where the impeller vane 4 is rotated when foreign matter is caught. The impeller vane driving means 2 is controlled so that the gap between the tip of the impeller vane 4 and the inner peripheral surface of the casing liner 1a is maximized by the concave groove 1e, so that the casing liner 1a and the impeller are rotated with the rotation of the impeller vane 4. Foreign matter caught between the vanes 4 can be automatically removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method of a movable vane pump and a control device of the movable vane pump for automatically removing foreign substances caught in the pump.

[0002]

2. Description of the Related Art In a movable vane pump used for pumping and draining, if the liquid to be handled is sewage or sewage, which may have foreign matter mixed therein, foreign matter may be introduced between the impeller vane and the casing liner during operation of the pump. Is often caught and rotation of the impeller vane becomes impossible, or it becomes difficult to adjust the blade angle of the impeller vane. For this reason, conventionally, a torque detecting means is provided in an impeller vane driving means for adjusting the blade angle of the impeller vane and a pump driving means for rotatingly driving the impeller vane, and these torque detecting means detect abnormal torque due to foreign matter being caught. In this case, the impeller vane driving means and the pump driving means are prevented from being broken or damaged due to foreign matter being caught by sounding an alarm or stopping the pump in an emergency.

[0003]

However, in the conventional method of sounding an alarm or stopping the pump when foreign matter is caught in the movable vane pump, the impeller vane driving means or the pump Although it is possible to prevent the means from breaking down or being damaged, it is necessary to disassemble the stopped movable vane pump and manually remove the caught foreign matter, and the foreign matter removal work However, there is a problem that the operation efficiency is poor because much time and labor is required, and the pump cannot be operated during this time, so that the operation rate of the pump is reduced.

The present invention has been made in order to solve the conventional problems, and can remove foreign matter without disassembling the pump even if foreign matter is caught between the impeller vane and the casing liner. It is an object of the present invention to provide a method for controlling a movable blade pump and a control device for a movable blade pump.

[0005]

According to a first aspect of the present invention, there is provided a method for controlling a movable vane pump, comprising the steps of: providing a casing liner having a concave groove for performance adjustment on an inner peripheral surface thereof; A movable body comprising a pump body comprising an impeller vane rotatably housed and having blades adjustable in angle, impeller vane driving means for adjusting the blade angle of the impeller vane, and pump driving means for rotatingly driving the impeller vane. A method of controlling a blade pump, wherein when an abnormal torque detecting unit provided in an impeller vane driving unit detects an abnormal torque due to a foreign object being caught, the blade angle of the impeller vane is reduced while the impeller vane is rotated. The impeller vane driving means is controlled so as to be positioned substantially parallel to the groove.

[0006] With the above structure, when the abnormal torque detecting means provided in the impeller vane driving means detects that an extraordinary torque is generated due to the foreign matter being caught between the impeller vane and the casing liner during the operation of the pump, the impeller is driven. The vane driving means adjusts the blade angle of the impeller vane to a position substantially parallel to the groove, and the gap between the tip of the impeller vane and the inner peripheral surface of the casing liner is maximized by the groove, so that the casing rotates with the rotation of the impeller vane. Foreign matter caught between the liner and the impeller vanes is automatically removed. This prevents the operation of the pump from being caught by foreign matter and makes it difficult to adjust the angle of the impeller vane 4 beforehand. , The man-hour required for the work of removing foreign substances can be reduced, and the pump does not need to be stopped, so that the operating rate of the pump can be improved.

According to a second aspect of the present invention, there is provided a method for controlling a movable vane pump, wherein a casing liner having a concave groove for performance adjustment formed on an inner peripheral surface and a casing liner rotatably accommodated in the casing liner. And a movable blade pump control method comprising: a pump body including an impeller vane having blades whose angles can be adjusted; an impeller vane driving unit that adjusts a blade angle of the impeller vane; and a pump driving unit that rotationally drives the impeller vane. When the abnormal torque detecting means installed in the pump driving means detects abnormal torque due to foreign matter biting, the impeller vane is rotated, and the impeller vane angle is substantially parallel to the groove. The impeller vane driving means is controlled so that

With the above construction, when the abnormal torque detecting means installed in the pump driving means detects that a foreign substance is caught between the impeller vane and the casing liner during the operation of the pump and abnormal torque is generated, the impeller vane driving is performed. By means, the blade angle of the impeller vane is adjusted to a position substantially parallel to the concave groove, and the gap between the tip of the impeller vane and the inner peripheral surface of the casing liner is maximized by the concave groove, so that the rotation of the impeller vane and the casing liner Foreign matter caught between the impeller vanes is automatically removed. This prevents the operation of the pump from being caught by foreign matter and makes it difficult to adjust the angle of the impeller vane 4 beforehand, and disassemble the pump body to manually remove the foreign matter that has been caught. , The man-hour required for the work of removing foreign substances can be reduced, and the pump does not need to be stopped, so that the operating rate of the pump can be improved.

According to a third aspect of the present invention, there is provided a method of controlling a movable vane pump, wherein the casing liner has a concave groove for performance adjustment formed on an inner peripheral surface thereof, and is rotatably housed in the casing liner. And a movable blade pump control method comprising: a pump body including an impeller vane having blades whose angles can be adjusted; an impeller vane driving unit that adjusts a blade angle of the impeller vane; and a pump driving unit that rotationally drives the impeller vane. When at least one of the abnormal torque detecting means provided in the impeller vane driving means and the pump driving means detects an abnormal torque due to the bite of a foreign object, the impeller vane is rotated in a state where the impeller vane is rotated. Is controlled to be at a position substantially parallel to the concave groove.

[0010] With the above structure, the fact that foreign matter is caught between the impeller vane and the casing liner during the operation of the pump and abnormal torque is generated can be detected by at least the impeller vane driving means and the abnormal torque detecting means provided on the pump driving means. When one is detected, the impeller vane driving means adjusts the blade angle of the impeller vane to a position substantially parallel to the groove, and the gap between the tip of the impeller vane and the inner peripheral surface of the casing liner is maximized by the groove, Foreign matter caught between the casing liner and the impeller vane is automatically removed with the rotation of the impeller vane. This prevents the operation of the pump from being caught by foreign matter and makes it difficult to adjust the angle of the impeller vanes, etc., as well as disassembling the pump body and manually removing the foreign matter caught. Since there is no need to remove, the man-hour required for the work of removing foreign substances can be reduced. In addition, since the pump does not need to be stopped, the operating rate of the pump is improved.

According to a fourth aspect of the present invention, there is provided a method of controlling a movable vane pump, wherein a discharge valve is provided at a discharge port of a pump body, and abnormal torque is detected and the discharge valve is closed. It is.

According to the above configuration, the water in the pump body is agitated by the impeller vane in a state where the discharge port of the pump body is closed by the discharge valve, so that the foreign matter caught between the casing liner and the impeller vane can be reliably prevented. Can be removed.

According to a fifth aspect of the present invention, there is provided a method of controlling a movable vane pump, wherein the impeller vane drive means is arranged such that when the pump drive means is stopped, the impeller vane angle is substantially parallel to the groove. Is controlled.

With the above-described structure, even when the movable blade pump is operated for a long period of time, foreign matter does not accumulate between the impeller vane and the casing liner, so that abnormal torque is prevented from being generated by the accumulated foreign matter. can do.

According to a sixth aspect of the present invention, there is provided a control apparatus for a movable vane pump, wherein a casing liner having a concave groove for performance adjustment formed on an inner peripheral surface thereof and a casing liner rotatably accommodated therein. And a movable blade pump control device including a pump main body including an impeller vane having blades whose angles can be adjusted, an impeller vane driving unit that adjusts the blade angle of the impeller vane, and a pump driving unit that rotationally drives the impeller vane. There is an abnormal torque detecting means installed on at least one of the impeller vane driving means and the pump driving means, and detecting an abnormal torque due to foreign matter being caught, and the impeller vane is detected when the abnormal torque detecting means detects an abnormal torque. Rotate the impeller vane so that the blade angle of the impeller vane is almost parallel to the groove. It is a more configuration and control means for controlling the means.

According to the above construction, the occurrence of extraordinary torque due to foreign matter being caught between the impeller vane and the casing liner during operation of the pump can be detected by detecting an abnormal torque provided on at least one of the impeller vane driving means and the pump driving means. When the means detects, the blade angle of the impeller vane is adjusted by the impeller vane driving means to a position substantially parallel to the groove, and the gap between the tip of the impeller vane and the inner peripheral surface of the casing liner is maximized by the groove, Foreign matter caught between the casing liner and the impeller vane is automatically removed with the rotation of the impeller vane. This prevents the operation of the pump from being caught by foreign matter and makes it difficult to adjust the angle of the impeller vanes, etc., as well as disassembling the pump body and manually removing the foreign matter caught. Since there is no need to remove, the man-hour required for the work of removing foreign substances can be reduced, and the pump does not need to be stopped, so that the operating rate of the pump can be improved.

[0017]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an overall view of a variable blade pump, in which a pump body 1 installed in a vertical direction and a pump body 1
And a pump drive source 3 comprising an impeller vane driving means 2 installed on the upper part of the blade and adjusting a blade angle of an impeller vane 4 described later and an electric motor for rotatingly driving the impeller vane 4.
It is composed of

The pump body 1 has a casing liner 1a as shown in FIG. 2, and the impeller vane 4 is accommodated in the casing liner 1a. A trumpet-shaped suction side is provided at a lower portion of the casing liner 1a. The casing 1b is connected to a cylindrical discharge-side casing 1c at the top, and a discharge valve 8 is connected to a discharge port 1d of the discharge-side casing 1c. The pump body 1
A hollow rotary shaft 5 is provided in the center in the vertical direction. The rotary shaft 5 is rotatably supported on the pump body 1 via a bearing (not shown).
The impeller vane 4 is attached to the lower end of the rotating shaft 5 while being connected to the pump drive source 3 installed above the impeller vane driving means 2.

The impeller vane 4 has a plurality of blades 4a, and a shaft 4b provided at the base end of each blade 4a is rotated by a substantially spindle-shaped hub 4c fixed to the lower end of a rotary shaft 5. It is freely supported. One end of a lever 4d is fixed to each shaft portion 4b in the hub 4c, and the other end of the lever 4d is connected to a bracket 6a attached to the lower end of the operating rod 6 by a link 4a.
e. The operating rod 6 is accommodated in the rotary shaft 5 so as to be movable in the axial direction, and the upper end is connected to the impeller vane driving means 2 installed on the upper part of the pump body 1, and the impeller vane driving means 2 The angle of each wing 4a of the impeller vane 4 can be continuously adjusted by vertically moving the operating rod 6 according to a control signal input from control means (not shown).

On the other hand, the inner peripheral surface of the casing liner 1a in which the impeller vane 4 is accommodated is formed in a spherical shape that maintains an appropriate gap between the impeller vane 4 and the front end thereof. As shown in FIG. 3, a concave groove 1e is formed. The concave groove 1e adjusts the pump performance by continuously changing the gap between the blade tip of the impeller vane 4 and the inner peripheral surface of the casing liner 1a according to the blade angle change of the impeller vane 4. When the blade angle of the impeller vane 4 reaches the minimum angle position indicated by the imaginary line in FIG. 3, it is formed on the inner peripheral surface of the casing liner 1a so as to be substantially parallel to the blade 4a of the impeller vane 4.

The impeller vane driving means 2 detects an abnormal torque before foreign matter is caught between the impeller vane 4 and the casing liner 1a during operation of the pump, and it becomes difficult to adjust the blade angle of the impeller vane 4. The abnormal torque detecting means 10 and the pump driving means 3 detect abnormal torque before foreign matter is caught between the impeller vane 4 and the casing liner 1a during operation of the pump and the impeller vane 4 cannot rotate. An abnormal torque detecting means 11 for detecting is provided. The abnormal torque detecting means 10 provided in the impeller vane driving means 2 is constituted by, for example, a torque switch. As shown in FIG. 3, the impeller vane driving means 2 applies a torque exceeding a preset abnormal torque set value a. Is detected, and this is detected, and an abnormal torque signal is output to the control means.

The abnormal torque detecting means 11 provided in the pump driving means 3 is, similarly to the abnormal torque detecting means 10,
For example, when a torque exceeding a preset abnormal torque set value a is applied to the pump driving means 3 as shown in FIG. 4, the torque switch is detected, and an abnormal torque signal is transmitted to the control means. Is output. Then, the control means controls each abnormal torque detection means 10,
The impeller vane driving means 2 and the pump driving means 3 are controlled as follows together with the input of the abnormal torque signal sent from the motor 11.

Next, a method of controlling the above-described movable blade pump will be described. The movable wing pump is installed in the vertical direction as shown in Fig. 1 and is used for pumping and draining,
The adjustment of the pumping amount and the drainage amount can be continuously adjusted by controlling the impeller vane driving means 2 by the control means and adjusting the blade angle of the impeller vane 4.

On the other hand, when the movable blade pump is used for pumping or draining sewage or sewage or the like in which foreign matter may be mixed, foreign matter may be caught between the impeller vane 4 and the casing liner 1a during operation of the pump. is there. If the caught foreign matter is small or not very hard, it may be removed spontaneously while the operation is continued, but if the foreign matter is large or hard, the foreign matter is caught and the pump driving means 3 is removed. Abnormal torque is generated. Further, if an attempt is made to adjust the blade angle of the impeller vane 4 in a state in which foreign matter is bitten, abnormal torque is also generated in the impeller vane driving means 2.

If foreign matter is caught at the point c shown in FIG. 5 during the operation of the pump, the driving torque of the impeller vane driving means 2 increases, and when this driving torque exceeds the abnormal torque set value a, the impeller vane The abnormal torque detecting means 10 installed in the driving means 2 detects the abnormal torque and sends an abnormal torque signal to the control means. When an abnormal torque signal is input from the abnormal torque detecting means 10, the control means
While the impeller vane 4 is being rotated, the discharge valve 8 connected to the discharge port 1d of the pump body 1 is closed, and at the same time, a control signal is sent to the impeller vane driving means 2 and the impeller vane 4 is controlled by the impeller vane driving means 2. The angle of each wing 4a is adjusted to a position where the wing 4a is substantially parallel to the concave groove 1e formed on the inner peripheral surface of the casing liner 1a.

As a result, the gap between the tip of each blade 4a and the inner peripheral surface of the casing liner 1a is maximized by the concave groove 1e, and at the same time, the pump body is rotated by the impeller vane 4 with the discharge port 1d closed by the discharge valve 8. Since the water in 1 is agitated, foreign matter caught between casing liner 1a and impeller vane 4 is automatically removed. When the time set in the control means elapses, the discharge valve 8 is opened and the impeller vane driving means 2 returns the angle of the blade 4a of the impeller vane 4 to the angle at the time of pump operation. Operation is resumed.

On the other hand, if foreign matter is caught at the point c shown in FIG. 4 during the operation of the pump, the driving torque of the pump driving means 3 increases, and when this driving torque exceeds the abnormal torque set value a, the pump driving means 3 The abnormal torque detecting means 11 installed in 3 detects this abnormal torque and sends an abnormal torque signal to the control means. The control means includes an abnormal torque detecting means 11
When an abnormal torque signal is input, the impeller vane 4
When the pump is rotated, the discharge valve 8 connected to the discharge port 1d of the pump body 1 is closed, and at the same time, an abnormality signal is sent to the impeller vane driving means 2 to cause the impeller vane driving means 2 to rotate.
Of the impeller vane 4 causes the casing liner 1
The angle of each blade 4a is adjusted to a position that is substantially parallel to the concave groove 1e formed on the inner peripheral surface of a.

As a result, the gap between the tip of each blade 4a and the inner peripheral surface of the casing liner 1a is maximized by the concave groove 1e, and at the same time, the pump body is opened by the impeller vane 4 with the discharge port 1d closed by the discharge valve 8. Since the water in 1 is agitated, foreign matter caught between casing liner 1a and impeller vane 4 is automatically removed. When the time set in the control means elapses, the discharge valve 8 is opened, and at the same time, the impeller vane driving means 2 returns the angle of the blade 4a of the impeller vane 4 to the angle at the time of pump operation. Operation is resumed.

As described above, during operation of the movable vane pump, foreign matter is caught between the impeller vane 4 and the casing liner 1a, and the torque acting on the impeller vane driving means 2 and the pump driving means 3 becomes a predetermined abnormal torque. When the set value a is exceeded, the foreign matter removing operation is automatically performed, so that the abnormal torque does not exceed the overtorque b shown in FIGS. 4 and 5, whereby the foreign matter is caught by the pump driving means 3 and the impeller. It is possible to prevent a situation in which the vane driving means 2 is damaged and the operation of the pump becomes impossible, and it becomes difficult to adjust the angle of the impeller vane 4.

Also, when the operation of the movable blade pump is completed, an operation program of the control means is prepared in advance so that the removing operation is performed. Since foreign matter does not accumulate between the liners 1a, a situation in which an abnormal torque is generated by the accumulated foreign matter can be prevented.

[0031]

As described above in detail, according to the present invention, when an abnormal torque is generated due to foreign matter being caught between the impeller vane and the casing liner during operation of the movable vane pump, the impeller vane is rotated. Therefore, since the impeller vane driving means is controlled so that the impeller vane blade angle becomes a position substantially parallel to the concave groove, the gap between the tip of the impeller vane and the inner peripheral surface of the casing liner is maximized by the concave groove. As a result, foreign matter caught between the casing liner and the impeller vane is automatically removed with rotation of the impeller vane, whereby the operation of the pump becomes impossible due to the foreign matter being caught, and the angle of the impeller vane is adjusted. In addition to preventing difficulties, it is necessary to disassemble the pump body and manually remove the caught foreign matter. Because there is no upper reduction of man-hours required for the foreign substance removal operation can be reduced, since there is no need to stop the pump, is also improved operating rate of the pump.

Further, since a discharge valve is provided at the discharge port of the pump body to detect abnormal torque and close the discharge valve, the discharge port of the pump body is closed by the impeller vane with the discharge valve closed. Since the water in the pump body is agitated, the foreign matter caught between the casing liner and the impeller vane can be reliably removed, and when the pump driving means is stopped, the impeller vane angle is set to the concave groove. By controlling the impeller vane driving means so as to be in a position substantially parallel to each other, even when the movable vane pump is operated for a long time, no foreign matter is deposited between the impeller vane and the casing liner. It is also possible to prevent the occurrence of abnormal torque beforehand.

[Brief description of the drawings]

FIG. 1 is an overall view of a movable vane pump according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the movable vane pump according to the embodiment of the present invention.

FIG. 3 is a diagram showing a method for controlling a movable vane pump according to an embodiment of the present invention.

FIG. 4 is a diagram showing a method for controlling a movable vane pump according to an embodiment of the present invention.

FIG. 5 is a diagram showing a method of controlling the movable vane pump according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump main body 1a Casing liner 1e Groove 2 Impeller vane driving means 3 Pump driving means 4 Impeller vane 4a Blade 8 Discharge valve 10 Abnormal torque detecting means 11 Abnormal torque detecting means

Claims (6)

[Claims] A pump body comprising: a casing liner having a concave groove for performance adjustment formed on an inner peripheral surface thereof; and an impeller vane rotatably housed in the casing liner and having blades adjustable in angle. A method for controlling a movable vane pump, comprising: an impeller vane driving unit that adjusts a blade angle of the impeller vane; and a pump driving unit that rotationally drives the impeller vane, wherein an abnormal torque detection installed in the impeller vane driving unit is provided. When the means detects an abnormal torque due to foreign matter being caught, the impeller vane driving means is controlled so that the blade angle of the impeller vane becomes a position substantially parallel to the concave groove in a state where the impeller vane is rotated. A method for controlling a movable vane pump, comprising: 2. A pump body comprising: a casing liner having a concave groove for performance adjustment formed on an inner peripheral surface; and an impeller vane rotatably accommodated in the casing liner and having blades adjustable in angle. A method for controlling a movable vane pump, comprising: an impeller vane driving unit that adjusts a blade angle of the impeller vane; and a pump driving unit that rotationally drives the impeller vane, wherein an abnormal torque detecting unit installed in the pump driving unit When detecting an abnormal torque due to foreign matter being caught, controlling the impeller vane driving means so that the impeller vane is in a position substantially parallel to the groove with the impeller vane rotated. A method for controlling a movable vane pump. 3. A pump body comprising: a casing liner having a concave groove for performance adjustment formed on an inner peripheral surface thereof; and an impeller vane rotatably housed in the casing liner and having blades adjustable in angle. A method for controlling a movable vane pump, comprising: an impeller vane driving unit that adjusts a blade angle of the impeller vane; and a pump driving unit that rotationally drives the impeller vane, wherein the impeller vane is installed in the impeller vane driving unit and the pump driving unit. When at least one of the detected abnormal torque detecting means detects an abnormal torque due to foreign matter biting, the impeller vane is rotated and the blade angle of the impeller vane is substantially parallel to the groove. A method for controlling a movable vane pump, comprising controlling the impeller vane driving means. 4. The method for controlling a movable vane pump according to claim 1, wherein a discharge valve is provided at a discharge port of the pump body to detect abnormal torque and close the discharge valve. . 5. The impeller vane driving means according to claim 1, wherein when the pump driving means is stopped, the impeller vane driving means is controlled such that the blade angle of the impeller vane is substantially parallel to the groove. The control method of the movable vane pump according to the paragraph. 6. A pump body comprising: a casing liner having a concave groove for performance adjustment formed on an inner peripheral surface; and an impeller vane rotatably accommodated in the casing liner and having blades adjustable in angle. An impeller vane drive unit that adjusts a blade angle of the impeller vane, and a control device of a movable vane pump that includes a pump drive unit that rotationally drives the impeller vane, wherein at least the impeller vane drive unit and the pump drive unit An abnormal torque detecting means installed on one side and detecting an abnormal torque caused by a foreign object being caught, and the impeller vane rotating with the impeller vane rotated when the abnormal torque detecting means detects the abnormal torque. Control means for controlling the impeller vane driving means so that the angle is substantially parallel to the groove. A control device for a movable vane pump, comprising: