JPH01200091A - Pump device - Google Patents

Abstract

PURPOSE:To smoothly transport liquid only or the liquid containing solid articles by installing a means for shifting the bearing part of a vane wheel shaft in the axis line direction and permitting the vane wheel to be shiftable between a position close to a suction port and a retreat position from the suction port. CONSTITUTION:When only liquid is transported, a vane wheel 2 is set at the position close to a suction port 4, which is introduced into liquid, and a driving source 9 is driven. Then, a rotor 19 and an outer shaft 15 revolve, and the vane wheel 2 is revolved through a vane wheel shaft 3, and the liquid outside a pump is sucked from the suction port 4, and passes through a swirl chamber 5 and is discharged from a discharge port 6. When the liquid containing solid articles is transported, a rod 27 is operated in the direction of arrow, and a casing 13 in which a bearing 14 is housed is moved upwardly, and the vane wheel 2 is raised to a supposed line position through the vane wheel shaft 3. In this state, the vane wheel 2 is revolved similarly, and the liquid including solid articles is sucked and discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pump device that is capable of efficiently sucking and discharging liquid depending on, for example, the type and properties of the liquid and whether or not it contains solids.

[Conventional technology]

Rotary pumps are used to pump up sewage tanks in buildings, industrial wastewater, sewage water, etc., which transport liquid using centrifugal force generated by the rotation of a single impeller.

Figure 4 shows a cross section of the main part of an example of a conventional rotary pump.
This pump has an impeller 2 arranged in a volute chamber 5, and has an inlet 4 in the axial direction of the impeller shaft 3 and an outlet 6 in the orthogonal direction. Axle 3
is connected to a power source (not shown). When the impeller 2 rotates in the liquid, the liquid sucked in from the suction port 4 is pushed out by centrifugal force into the swirl chamber 5 and is discharged from the discharge port 6. In this pump, interlocking energy added to the liquid is efficiently converted into pressure energy, so it is possible to obtain a large flow rate.

However, if the liquid contains solids, it is difficult to use.Since the suction port 4 and the impeller 2 are close to each other, the solids that reach the suction port 4 pass through between the blades of the impeller 2. If a large solid object is sucked in, the suction port 4 may be clogged or the impeller 2 may be damaged. Therefore, the use of this type of pump is limited to the transportation of liquids that do not contain solids, such as fresh water.

A rotary pump shown in FIG. 5 is used to transport liquids containing solids. This expands the volute chamber 5 of the pump shown in FIG. 4 in the axial direction of the impeller 2, and
are spaced apart.

When the impeller 2 rotates, a vortex is generated within the vortex chamber 5, and the liquid is sent to the discharge port 6 by the centrifugal force. Even if solid matter is sucked in, there is sufficient space between the impeller 2 and the suction port 4, so there will be no clogging or damage to the impeller 2, even if the liquid contains solid matter. It is possible to transport with liquid. However, this pump has a lower efficiency in converting kinetic energy into pressure energy and a shorter head than the above-mentioned pumps.

As described above, conventional rotary pumps had to be used depending on whether the liquid contained solids or not.

[Problem that the invention seeks to solve]

The present invention was made in order to solve the above-mentioned disadvantages, and an object of the present invention is to provide a pump device that can obtain a large flow rate when transporting only liquid, and can also smoothly transport liquids containing solids. do.

[Means for solving problems]

A pump device of the present invention, which has been made to achieve the above object, will be explained using FIG. 1 corresponding to an embodiment. As shown in the figure, the pump device of the present invention has a displacement means 10 for displacing the bearing portion 11 of the impeller shaft 3 in its axial direction. By displacing the bearing part 11 with the displacement means 10, the position where the impeller 2 approaches the suction port 4 and the suction port 4 are adjusted.
Displaced from the position to the retreated position.

[Effect]

When transporting only liquid, the 1-impeller 2 is close to the suction port 4. When the 0-impeller 2 rotates in the liquid, the liquid is sucked in from the suction port 4 and discharged.

If the liquid contains solids, the displacement means 10 is used to move the impeller 2 back from the suction port 4.

There is a gap between the impeller 2 and the suction port 4. When the impeller 2 rotates, a vortex is generated between the impeller 2 and the suction port 4.

Even if the sucked liquid contains solids, they will be discharged together with the liquid due to the centrifugal force of the vortex.

(Example〕 Hereinafter, one embodiment of the present invention will be described in detail.

FIG. 1 shows an embodiment of a pump device to which the present invention is applied. This pump device includes a suction/discharge section 7, a connecting section 8, and a drive source 9.
The impeller shaft 3 is disposed through the center of the main body and the displacement means 10.

A flange-shaped bearing portion 11 is attached to the upper end of the impeller shaft 3.
The bearing portion 11 is pivotally supported by a bearing 14 inside the casing 13.

A part of the impeller shaft 3 inside the drive source 9 is a spline shaft 12, and a corresponding outer part 15 is fitted so as to be slidable in the axial direction and engaged in the rotational direction.

The outer shaft 15 is pivotally supported by a bearing 17 attached to the lid 16, and is prevented from being removed by a collar portion 18 at the upper end.

The outer shaft 15 is a rotating shaft of the drive source 9, and the rotor 1 is mounted on the outer periphery of the outer shaft 15.
3 is installed.

A stator 2 corresponding to the rotor 19 is mounted on the inner wall of the body 20.
1 is placed. Further, the impeller shaft 3 is supported by a bearing 22 at the bottom of the body 20.

The connecting portion 8 connects the drive source 9 and the suction/discharge portion 7, and the mechanical seal 23 is in close contact with the impeller shaft 3. Lubricating oil is sealed around it.

The impeller 2 is housed inside the body 24 of the suction/discharge portion 7 , and the impeller 2 is attached to the lower end of the impeller shaft 3 . body 24
An inlet 4 is provided in the axial direction of the impeller shaft 3, and an outlet 6 is provided on the side surface thereof, and these communicate with the swirl chamber 5.

The support plate 25 of the displacement means IO is connected to the main body, and a pair of guide members 2B that sandwich the casing 13 are attached to both sides thereof. A rod 27 is swingably supported by a shaft 28 on the front surface of the support plate 25 . The tip of the rod 27 and the casing 13 are connected by connecting members 28 and 30.

This pump device is used as follows.

When the liquid does not contain solid matter, the impeller 2 is placed close to the suction port 4, the suction port 4 is placed in the liquid, and the drive source 9 is operated. When the rotor 19 and the outer shaft 15 rotate, the rotational force is transmitted to the impeller shaft 3 and the impeller 2 rotates.When the impeller 2 rotates, the liquid outside the pump is sucked into the swirl chamber 5 through the suction port 4. Continuously press-fitted. The liquid in the swirl chamber 5 is pushed out to the discharge port 6 by centrifugal force and is discharged.

If the liquid contains solids, move the rod 27 in the direction of the arrow. When the rod 27 rotates about the shaft 28, the rotational force is transmitted to the casing 13 by the connecting members 29 and 30, and the casing 13 is guided. The members 26 are displaced upwardly. Therefore, the impeller shaft 3 is displaced upward, and the impeller 2 reaches the position shown by the imaginary line on the spline shaft of the 0-impeller shaft 3! 2 slides on the inside of the outer shaft 15, so the outer shaft 15 and rotor 19 do not move.In this state, the impeller 2
When the vortex is rotated, a vortex is generated in the vortex chamber 5, and the liquid is sent to the discharge port 6 by the centrifugal force of the vortex. Even if solid matter is sucked in, there is a sufficient gap between the impeller 2 and the suction port 4, so that the solid matter can also be sent to the discharge port 6 and discharged together with the liquid vortex. At this time, no clogging occurs or damage to the impeller 2 occurs.

ff12 and FIG. 3 are other embodiments of the pump device to which the present invention is applied.

The pump device shown in FIG.
1. A bearing 17 that pivotally supports the outer ring 15 is attached to the bottom of the casing 31. A pair of guide members 2G and a shaft 28 are attached inside the casing 31, the guide member 2B inserts the casing 13, and the shaft 28 pivotably supports the rod 27. The tip of the rod 27 and the casing 13 are connected to a connecting member 29
and 30.

This pump device can also be used in the same manner as the pump shown in FIG. 1, and the same effects can be obtained.

In the pump device shown in FIG. 3, the displacement means 10 is composed of a motor and a transmission means for converting the rotational motion of the motor into linear motion, and the pump device shown in FIG. 3 is the same as the pump device shown in FIG. 1 except for the displacement means 10. . The motor 33 is attached to the front surface of the support plate 25, and a gear 34, which is a rotating shaft of the motor 33, is engaged with a gear 3B supported by a bearing 35. The worm gear 37 is integral and coaxial with the gear 3B, and its tip is connected to the casing 1.
3 is screwed into a screw hole 38 on the top surface.

When only liquid is to be transported, the impeller 2 is used close to the suction port 4, similar to the pump described above. - On the other hand, if solid matter is included in the liquid, the motor 33 is driven.

When the gear 34 rotates, its rotational force is transmitted to the gear 36, and the worm gear 37 rotates in the direction of the arrow. When the rotational motion is converted into linear motion by the worm gear 37 and the screw hole 38, the casing 13 moves between the guide members 28 and the gear 36.
Displaced to the side. For this reason, the impeller shaft 3 is displaced upward, and the 1st impeller 2 retreats from the suction port 4 to reach the upper part of the volute chamber 5. Since a sufficient space is created between the 0th impeller 2 and the suction port 4, the solids It is also suitable for sucking and discharging liquids containing .

In the case of a pump device in which the impeller 2 is displaced by a motor 33 as shown in FIG. 3, a solid matter sensor is attached near the suction port 4 and linked to the displacement means 10, and the displacement means 10 is activated depending on the presence or absence of solid matter. The impeller may also be controlled so that it is automatically displaced. The figure shows a transmitter 39 as a solid object sensor.
An example in which an ultrasonic sensor consisting of a receiver 4o and a receiver 4o is attached is shown. This pump device is also normally used with the impeller 2 close to the suction port 4. When the sensor detects solid matter in the liquid, the motor 33 rotates, and the impeller 2 reaches the upper part of the swirl chamber 5. After the solid matter has been discharged, the motor 33 can be reversed to return the impeller 2 to the suction port 4 side. As the solid matter sensor, in addition to an ultrasonic sensor, for example, a contact type sensor or a radiation sensor can be used. . Alternatively, a torque sensor may be incorporated into the mechanical seal 23 of the connecting portion 8 to detect the torque of the impeller shaft 3, and the displacement means IO may be controlled in accordance with the fluctuation thereof.

In addition to the spline bearing, a cock bearing, a thrust bearing, a magnetic bearing, or a fluid bearing can be used as a means for joining the impeller shaft 3 and the outer shaft 15.

〔Effect of the invention〕

As explained in detail above, in the pump device of the present invention, the position of the impeller is variable. Therefore, when sucking and discharging only liquid, a large flow rate can be obtained, and liquids containing solids can also be smoothly transported. Furthermore, even if solid matter is inhaled, it will not clog or damage the impeller.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the pump device of the present invention, FIGS. 2 and 3 are longitudinal sectional views of another embodiment, and FIGS. 4 and 5 are main points of a conventional pump device. FIG. 2... Impeller 3... Impeller shaft 4...
・Suction port 5...Vortex chamber 6...Outlet port 7...Suction/exhaust part 8...Connection part
9... Drive source lO... Displacement means
11...Bearing part 12...Spline shaft 13
φ31...Casing 14-17/22...Bearing 15...Outer shaft 18...M
18...Brim portion 18...Rotor 2
1... Stator 23... Mechanical seal 20
@24...Body 25...Support plate 2
6... Guide member 27... Rod 2
8... Axis 29, 30... Connection member 33...
・Motor 3403G...Gear 35...
Bearing 37...Worm gear 38...Threaded holes 39, 40...Solid object sensor patent applicant Toyo Kankyo Co., Ltd.

Claims (1)

[Claims] 1. An impeller connected to a drive source is provided in an impeller chamber, and the impeller chamber is provided with an inlet in the axial direction of the impeller shaft and an outlet in the periphery, and the impeller is rotationally driven. In a rotary pump device in which liquid is sucked in from an inlet and discharged from an outlet by being moved, the device has means for displacing a bearing portion of an impeller shaft in the axial direction, and the displacement means displaces the bearing portion. A rotary pump device characterized in that the impeller is displaced between a position close to the suction port and a position retreated from the suction port. 2. The rotary pump device according to claim 1, wherein the displacement means comprises a motor and a transmission means for converting the rotational motion of the motor into linear motion. 3. The rotary pump device according to claim 2, wherein the motor rotates in response to a signal from a sensor that detects solid matter near the suction port and displaces the impeller. 4. The rotary pump device according to claim 2, wherein the motor rotates and displaces the impeller in response to a signal from a sensor that detects the torque of the impeller shaft.