JP6823914B2 - Vortex pump device - Google Patents

Description

The present invention relates to a pump device, and particularly to a vortex flow type pump device.

As a conventional vortex flow type pump device, there is one shown in Patent Document 1. In paragraph (0016) of Patent Document 1, "blue, which is a corrosion-resistant material, has a partition wall portion 52 that divides a part of the water passage 13 into a suction side 14 and a discharge side 15, and a liner surface 51 having a diameter smaller than that of the water passage 13. The copper inner ring 50 is fixed to the synthetic resin casing 70 by a plurality of tapping screws 16, and in paragraph (0019), "a large pressure difference occurs on both sides of the partition 52." Therefore, the liner surface 51 is provided to obtain a frictional force to prevent loss. That is, if the gap between the impeller 5 and the liner surface 51 is large, the efficiency is significantly reduced, and the frictional force is obtained accordingly. This is because the efficiency of the resin surface as it is is significantly reduced due to sink marks and the like peculiar to the resin. In the embodiment of the present invention, the synthetic resin casing 70 and the rotating object, which are fixed objects, are used. By providing an inner ring 50 made of bronze between the impeller 5 and the impeller 5, these are prevented. ”It is described that the effect can be obtained.

Japanese Unexamined Patent Publication No. 2012-87657

Here, in the vortex flow type pump device, when a disk-shaped impeller having a large number of short fan-shaped grooves is rotated on the circumference, a vortex is generated in the groove of the impeller and the water passage of the synthetic resin casing. While increasing the kinetic energy, it makes almost one revolution and becomes high pressure.

In Patent Document 1, since the inner ring is made of bronze, which is a highly rigid material, the above-mentioned kinetic energy may collide with the partition wall portion or the liner surface of the bronze inner ring to generate vibration, which may cause noise. There is.

Since kinetic energy increases in proportion to the pressure, if the pressure rises to near the pressure at which the pump is stopped, the metallic jarring noise becomes more prominent, which may become a market complaint.

An object of the present invention is to provide a vortex pump device that is inexpensive, has excellent durability, and has low noise.

In order to solve the above problems, the present invention includes an electric motor, a casing in which a water passage is formed, an impeller rotated by the electric motor, and an inner ring facing the impeller. Among them, at least, the impeller and the liner surface facing the impeller in the rotation axis direction are made of a thermoplastic elastomer having elasticity .

Further, in the present invention, the rotating shaft of the electric motor penetrates the synthetic resin casing and is fixed in the order of the shaft sealing device and the impeller, and the casing cover is watertightly fixed via the O-ring so as to cover the impeller. In a vortex pump device that performs a vortex pump action by rotating a rotating shaft, it has at least one partition body that separates the suction side and the discharge side of the synthetic resin casing, and a liner body that has a liner surface. It has an inner ring, and the inner ring is made of an elastic material, and the inner ring is fixed to the synthetic resin casing.

Further, in the present invention, the rotating shaft of the electric motor penetrates the synthetic resin casing, is fixed in the order of the shaft sealing device and the impeller having a large number of grooves around it, and the casing cover O-rings so as to cover the impeller. In a vortex pump device that is watertightly fixed through and performs a vortex pump action by rotation of a rotating shaft, a partition body that separates the suction side and the discharge side of the synthetic resin casing, and a liner body having a liner surface. The impeller, the groove, the casing cover, and the liner surface at least one of the impeller, the groove, the casing cover, and the liner surface are made of an elastic material.

According to the present invention, by forming the inner ring from an elastic material and fixing it to a synthetic resin casing, it is possible to obtain an inexpensive, highly durable, and low-noise vortex pump device.

It is a vertical sectional view of the vortex flow type pump device which concerns on this invention. It is a perspective view of the pump head part which concerns on this invention. It is a perspective view which fixed the synthetic rubber inner ring to the synthetic resin casing which concerns on this invention.

An embodiment of the present invention is characterized in that the inner ring 50 is formed of a synthetic resin casing 70 with an elastic material, and the inner ring 50 is fixed to the synthetic resin casing 70.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical sectional view of a vortex pump device according to the present invention. FIG. 2 is a perspective exploded view of the pump head portion according to the present invention. FIG. 3 is a perspective view in which a synthetic rubber inner ring is fixed to a synthetic resin casing according to the present invention.

The vortex pump device 100 according to an embodiment of the present invention includes an electric motor 1, a casing cover 3, an impeller 5, a check valve 9, a separation chamber 10, a packing 11, a groove 12, and a tapping screw. It has 17, 18 and a separator 53 and a casing 70.

In the vortex flow type pump device 100 of the present invention, the rotating shaft 2 of the electric motor 1 penetrates the synthetic resin casing 70, passes through the shaft sealing device 4, and has a disk shape having a large number of grooves 12 (blades) in the periphery. The impeller 5 is fixed. The shaft sealing device 4 has a cylindrical shape and is inserted between the outer periphery of the rotating shaft 2 and the through hole of the synthetic resin casing 70, and the shaft sealing device 4 penetrates the synthetic resin casing 70 also with respect to the rotating shaft 2. It is also slidable relative to the hole. An annular water passage 13 is formed inside the synthetic resin casing 70 so as to be concentric with a large number of grooves 12. The inner ring 50 is integrally provided with a partition wall 53 that divides a part of the water passage 13 into a suction side 14 and a discharge side 15, and a liner body having a liner surface 52 having a diameter smaller than that of the water passage 13. The inner ring 50 is made of elastic synthetic rubber. The inner ring 50 is fixed to the synthetic resin casing 70.

FIG. 3 shows a diagram in which the inner ring 50 is fixed to the synthetic resin casing 70 of the present invention. The casing cover 3 covers the impeller 5. An inner ring 50 having a water passage 13, a partition wall 53, and a liner surface 52 is provided so as to be substantially symmetrical with respect to the impeller 5. The inner ring 50 is fixed to the casing 70 between the casing cover 3 and the casing 70 by attaching an O-ring 7 to the casing cover 3 and tightening the casing cover 3 with a tapping screw 17. As a result, the pump head portion is configured. The O-ring 7 is inserted between the outer circumference of the water passage 13 of the casing 70 and the outer circumference of the water passage of the casing cover 3.

The inner ring 50 may be fixed to the synthetic resin casing 70 by insert molding or double molding. By using insert molding, it is possible to form a high-precision liner surface 52 without processing. The double molding has the effects of high fusion with synthetic resin and the ability to form a highly accurate liner surface 52 without processing.
A check valve 9 for preventing backflow is provided on the suction side 14 separated by the partition wall 53, that is, on the upstream side of the impeller 5. A water passage that also serves as a separation chamber 10 that promotes self-sufficiency is formed on the discharge side 15, that is, the downstream side of the impeller 5, which is separated by the partition body 53, and the synthetic resin casing 70 is formed via the packing 11. It is fixed to the tapping screw 18 and leads to a faucet or the like.

When the impeller 5 rotates due to the rotation of the rotating shaft 2 of the electric motor 1, the pumped water generates a vortex in the groove 12 of the impeller 5 and the water passage 13 of the synthetic resin casing 70, while increasing the kinetic energy. It makes almost one rotation to become a high pressure, is separated by the partition body 53, and is guided to the separation chamber 10. Since a large pressure difference occurs on both sides of the partition body 53, a liner surface 52 is provided to obtain a frictional force to prevent loss.

However, as described above, in the conventional example, since the inner ring 50 is made of bronze, which is a high-rigidity material, the kinetic energy of the vortex generated from a large number of grooves 12 due to the rotation of the impeller 5 is transferred to the liner surface 52 and the partition body. It may collide with 53, be converted into kinetic energy and propagate to the synthetic resin casing 70 and the casing cover 3, causing noise.

Further, when the pressure rises to near the pump stop pressure, the kinetic energy increases in proportion to the pressure, so that the metallic jarring sound becomes more prominent, which may cause a market complaint.

In the embodiment of the present invention, the inner ring 50 is made of synthetic rubber, which is a material having elasticity. By forming the material with elasticity, it is possible to attenuate the vibration energy that may be generated when the kinetic energy of the vortex collides with the liner surface 52 and the partition body 53 of the inner ring 50. By attenuating the vibration energy and reducing the vibration to the casing 70, it is possible to suppress annoying noise and reduce the noise.

Further, the discharge side side surface 53a of the partition body 53 is exposed without being covered with the inner ring guide 71 which is a part of the synthetic resin casing 70, and the synthetic rubber surface is used as the water contact surface, so that the vortex flow indicated by the arrow X can be generated. The damping effect of the vibration energy generated by the collision can be further improved.

The synthetic resin casing 70 is provided with an inner ring 50 made of an elastic material having at least one of a partition wall 53 for separating the suction side and the discharge side of the synthetic resin casing 70 and a liner body having a liner surface 52. It stuck.

It also has an advantage over wear of the pump head, which is the main cause of deterioration of pump performance. In the conventional bronze inner ring, when foreign matter such as sand is mixed in, the liner surface and the surface of the partition wall are hard, so that they are easily scratched, and wear may progress due to long-term use, resulting in deterioration of performance.

On the other hand, in the embodiment of the present invention, since the surface of the inner ring 50 has elasticity, some deformation is allowed, and even when a foreign substance is bitten, there is little damage and performance deterioration due to wear is suppressed. Can be done. That is, since the inner ring 50 is made of synthetic rubber, which is a material having elasticity, it can be made excellent in durability.

Both the material and hardness of the inner ring 50 have a great influence on the pump performance.

As for the material, it must be elastic. However, a water-absorbent sponge or the like may not be able to maintain a high pressure due to internal water leakage from the liner surface 52 or the partition wall 53.

Regarding the hardness, if it is too soft, the liner surface 52 is deformed at high pressure and the gap with the impeller 5 becomes large and the frictional force cannot be maintained. On the contrary, if it is too hard, the damping of vibration energy becomes insufficient and noise cannot be reduced.

Therefore, it is desirable that the inner ring 50 has a skin layer without water absorption. For example, performance and noise reduction can be ensured by using a material having elasticity in the range of 50 ° C. to 70 ° C. for synthetic rubber and 50 ° C. to 90 ° C for thermoplastic elastomer.

As described above, it is desirable that the inner ring 50 is formed of a material having elasticity by integrating the partition body 53 and the liner body provided with the liner surface 52, but for a simpler configuration, the partition body 53 and the liner are formed. Even when the liner body provided with the surface 52 is separated from the liner body and any one of them is made of an elastic material, the effect of noise reduction can be obtained as compared with the bronze inner ring.

In the examples of the present invention, synthetic rubber is selected as the material of the inner ring 50 in order to satisfy the above, but a thermoplastic elastomer having the same properties may be used. Each is excellent in the following points.

If the inner ring 50 is made of synthetic rubber, the inner ring has excellent hydrolysis resistance and less compression set.

If the inner ring 50 is made of a thermoplastic elastomer, the inner ring can be double-molded to form a liner surface 52 having high fusion resistance to a synthetic resin and without processing and with high precision.

Further, according to the present invention, since machined metal parts are not used as the material of the pump head, raw material costs and processing costs can be suppressed, so that the pump head can be manufactured at a lower cost and no sorting is required even when it is discarded. Become. That is, since the inner ring 50 is made of synthetic rubber, which is a material having elasticity, it can be manufactured at a lower cost than the inner ring made of bronze.

By forming the casing cover 70 with a material having elasticity as well, the effects of low cost, durability, and low noise are further improved.

In this embodiment, the inner ring 50 is made of an elastic material, but the parts that affect the performance deterioration and noise increase due to the progress of wear, that is, the water passage 13, the impeller 5, and the groove 12 The liner surface of the casing cover 3 is also made of an elastic material, so that it is inexpensive, has excellent durability, and has a low noise effect.

1 Electric motor 2 Rotating shaft 3 Casing cover 4 Shaft sealing device 5 Impeller 7 O-ring 9 Check valve 10 Separation chamber 11 Packing 12 Groove 13 Water passage 14 Suction side 15 Discharge side 17, 18 Tapping screw 50 Inner ring 52 Liner surface 53 Partition body 53a Discharge side side surface 70 Synthetic resin casing 71 Inner ring guide 100 Swirl flow type pump device

Claims (3)

With an electric motor
The casing in which the water passage is formed and
An impeller rotated by the electric motor and
With an inner ring facing the impeller,
A vortex pump device characterized in that at least the impeller and the liner surface of the impeller facing the rotation axis direction of the inner ring are made of an elastic thermoplastic elastomer. With an electric motor
The casing in which the water passage is formed and
An impeller rotated by the electric motor and
An inner ring having a liner surface facing the impeller is provided.
A vortex flow pump device characterized in that a partition wall portion that divides a part of the water passage into a suction side and a discharge side, and the liner surface are made of an elastic thermoplastic elastomer. The casing is made of synthetic resin and
The vortex pump device according to claim 2, wherein the inner ring is made of an elastic thermoplastic elastomer.

Images