JPH07301200A - Pump device - Google Patents

Abstract

PURPOSE:To absorb vibration transmitted from an installation part for reducing noise by boring vibration absorbing slits to surround an installation device insertion hole at the installation part. CONSTITUTION:In an installation part 5a having motor installation device insertion holes 5c, four of them are provided around an impeller installation shaft insertion hole 5e at a constant interval from it, so a pump installation plate 5 can be connected to the motor 1 securely. Among four swollen parts (b) formed above/under and right/left of the impeller installation shaft insertion hole 5e, arc-shaped vibration absorbing slits S are bored to be positioned on the upper side and lover side of the motor installation device insertion holes 5c in the upper and lover swollen parts (b), and the arc-shaped vibration absorbing slits S are bored to be positioned on the right and left of the motor installation device insertion holes 5c in the right and left wollen parts (b). Vibration transmitted through motor installation screws inserted into the motor installation device installation holes 5c can thus be absorbed without deflection in any direction upward, downward, right, or left, thereby noise can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device which reduces noise.

[0002]

2. Description of the Related Art Conventionally, in a pump device, a pump main body is attached to one end of a motor via a pump attachment plate, and an attachment portion having an attachment insertion hole for inserting an attachment such as a screw is provided on the pump attachment plate. There is something.

Hereinafter, as a conventional pump device of this type, the structure of a self-priming pump X will be briefly described with reference to FIGS.

That is, as shown in FIG. 9, a self-priming pump X
Is composed of a motor 51 and a pump main body X1, and the pump main body X1 is provided with a pump casing 52 for accommodating the impeller 54 and a casing cover 53. The motor 51 and the pump main body X1 are attached to the pump. It is connected through a plate 55.

The motor 51 and the pump mounting plate 55 are connected by a motor mounting screw 56, and the pump mounting plate 55 and the pump body X1 are connected.
And are connected by a pump mounting screw 57.

Further, the pump mounting plate 55 has a plurality of mounting portions 69 as shown in FIG. 10, and the mounting portion 69 for connecting with the motor 51 is provided at a substantially central position of the pump mounting plate 55. A plurality of them are provided around the provided impeller mounting shaft insertion hole 66,
Each has a motor fixture insertion hole 67.

A plurality of mounting portions 69 for connecting the pump body X1 are provided in the vicinity of the peripheral edge of the pump mounting plate 55, each having a pump mounting hole 68.

In FIG. 9, 58 is a condenser and 59
Is a capacitor mounting screw, 60 is a rubber ring, 61 is a mechanical seal, 62 is a pump casing 52 and a casing cover.
A partition plate that separates 53 from each other, 63 is a packing, and 64 is an impeller mounting shaft.

[0009]

However, the above-mentioned pump device still has the following problems.

That is, since the pump mounting plate 55 serves as a connecting member between the motor 51 and the pump main body X1, the vibration is transmitted from two paths, that is, the vibration generated by the motor 51 and the vibration generated by the pump main body X1. Therefore, there is a problem that the two vibrations resonate to generate noise.

Therefore, as shown in FIG. 10 and FIG.
A bulging mounting portion 69 is formed on the motor side, and a mounting bracket insertion hole 67 for the motor is provided in the mounting portion 69 to facilitate and secure the connection by the motor mounting screw 56, and to connect the motor 51 and the pump main body. The contact area with X1 is made as small as possible, and the bulging part absorbs the vibration, and from the motor 51 side and the pump body X1
It was trying to prevent the generation of noise by preventing resonance due to vibration from the side.

However, the vibrations from the motor 51 and the pump body X1 are eventually transmitted to the four sides of the pump mounting plate 55 via the rigid motor mounting screws 56 connecting the motor 51 and the pump mounting plate 55. As a result, noise due to resonance cannot be reliably prevented.

Further, in order to prevent resonance, it is conceivable to change the vibration frequency. In consideration of the rigidity of the pump mounting plate 55, in order to increase the rigidity, the plate thickness should be increased or the rigidity should be decreased. It was considered to reduce the plate thickness.

However, if the plate thickness is increased, the weight of the entire pump is increased and the cost is increased, and if the plate thickness is decreased, the strength of the entire pump is deteriorated.

Therefore, the present applicant considers that the vibration level is reduced by absorbing the vibrations from the two propagation paths, that is, the vibration generated by the motor 51 and the vibration generated by the pump body X1. As shown in FIGS. 12 and 13, an experiment was conducted by providing a circular hole 90 and a long hole 91 in the pump mounting plate 55.

However, the expected results could not be confirmed from the experimental results, and the noise could not be reduced.

[0017]

SUMMARY OF THE INVENTION The present invention relates to a pump device in which a motor and a pump body are connected by a fixture such as a screw through a pump attachment plate having an attachment portion having an attachment insertion hole. The present invention relates to a pump device, wherein a vibration absorbing slit is formed in a state of surrounding the fixture insertion hole of the attachment portion.

The present invention is also characterized by the following configurations.

(A) A plurality of the vibration absorbing slits are formed at intervals so as to follow the shape of the fitting insertion hole.

(B) A plurality of mounting portions are provided on the pump mounting plate while being separated from each other, and a vibration absorbing slit is provided on each mounting portion.

(C) A vibration absorbing slit is provided at the periphery of each fitting insertion hole of each of the plurality of mounting portions, and the peripheral edge drilling position of the vibration absorption slit with respect to each fitting insertion hole is set to another fitting insertion hole. The position of the peripheral edge of each vibration absorbing slit is different from that of the hole.

(D) The mounting portion has a motor mounting tool insertion hole for connecting a motor provided in the central portion of the pump mounting plate, and a pump main body connecting pump provided in the peripheral portion of the pump mounting plate. And a mounting bracket insertion hole for a motor, and the vibration absorbing slit is formed in a mounting portion having a mounting bracket insertion hole for a motor.

(E) The fitting insertion hole is provided at the bulging portion formed on the pump mounting plate, and the vibration absorbing slit is provided at the base of the bulging portion.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pump device according to the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of a self-priming pump as a pump device according to the present invention, and FIG. 2 is an explanatory diagram of a pump mounting plate.

A self-priming pump A as a pump device according to the present invention has substantially the same structure as the conventional self-priming pump X shown in FIG.

In FIG. 1, reference numeral 1 is a motor for driving an impeller 4 of a self-contained pump A, and reference numeral 1a is an impeller mounting shaft which is a main shaft of the motor 1.

Reference numeral 2 is a pump casing forming the impeller chamber 21, and 3 is a casing cover for holding priming water, and both constitute a pump main body a.

The pump casing 2 and the casing cover 3 are formed so that one side is open, the open sides are opposed to each other, and the two and 3 are connected via a partition wall 6.

Further, the partition wall 6 is provided with a plurality of communication holes 6a, 6b for self-priming and communication holes 6c, 6d as pumping passages, and the casing cover 3 side and the pump casing 2 are formed. I try to communicate with the side.

The pump casing 2 has a substantially circular impeller chamber 21 formed in the lower half thereof, and a water supply chamber 22 is provided above the impeller chamber 21 so that both chambers 21 and 22 communicate with each other. .

The impeller 4 is disposed in the impeller chamber 21 and is connected to the impeller mounting shaft 1a of the motor 1 via a rubber ring 1b and a mechanical seal 9.

The casing cover 3 includes a water inlet 31 and a water outlet.
33 and the water suction passage 32 communicating with the water suction port 31
And a tank chamber 34 and a circulation chamber communicating with the water supply port 33.
And form 35. A steam separation unit is formed above the tank chamber 34.

The above-mentioned tank chamber 34 communicates with the impeller chamber 21 through the communication hole 6a, and also communicates with the water supply chamber 22 of the pump casing 2 through the upper communication hole 6d.

The circulation chamber 35 communicates with the impeller chamber 21 through a communication hole 6b, and the water suction passage 32 and the impeller chamber 21 communicate with each other through a central communication hole 6c.

The partition wall 6 is formed by superposing the partition plate 7 and the packing 8 so as to be in close contact with each other, and the communication holes 6a, 6b,
6c and 6d are formed coaxially on the partition plate 7 and the packing 8. The packing 8 has holes corresponding to the communication holes 6a, 6b, 6c, 6d, and prevents water leakage from the communication holes 6a, 6b, 6c, 6d.

The above-described motor 1 and pump body a are connected by a mounting tool via a pump mounting plate 5, and the motor 1 and pump mounting plate 5 are connected by a motor mounting screw 71 as a mounting tool. , Pump mounting plate 5 and pump body a
Are also connected by a pump mounting screw 72 as a mounting tool.

That is, a plurality of mounting portions 5a are formed on the pump mounting plate 5 while being separated from each other, and the mounting portion 5a has a motor mounting portion insertion hole 5c as a mounting portion insertion hole and a pump mounting portion. A through hole 5d is formed, and mounting screws 71 and 72 are inserted into the through holes 5c and 5d, respectively, to connect the motor 1 and the pump mounting plate 5, and the pump mounting plate 5 and the pump body a. Is.

In FIG. 1, 4a is a blade of the impeller 4,
5e is an impeller mounting shaft insertion hole, 10 is a cylindrical bearing portion that supports the impeller mounting shaft 1a, 13 is a shaft insertion hole, and 27 is a pump casing 2.
Is a plurality of reinforcing ribs provided on the back wall 25 of the.

In the self-priming pump A described above, the gist of the present invention is that the vibration absorbing slit S is formed in a state surrounding the fitting insertion hole of the mounting portion 5a.

That is, as shown in FIG. 1, the pump mounting plate 5
In the pump device in which the motor 1 and the pump main body a are connected via the self-priming pump A, when the self-priming pump A is operated, due to the rotation speed of the impeller 4 and the number of blades 4a, the impeller chamber
At the outlet of the volute 21, pressure pulsations equivalent to the number of impeller rotations × the number of blades are generated, and vibrations having a fundamental frequency and its high frequency as a peak component are generated, which causes noise.

Such vibrations are transmitted to the constituent parts of the self-priming pump A, and even in the vibrations, the pump mounting plate 5 vibrates from the pump body a side and the impeller 4 Vibrations propagated from the motor 1 side and vibrations from two propagation paths are received via the impeller mounting shaft 1a. Then, the two vibrations resonate with each other, further increasing the noise.

Therefore, by providing the above-mentioned vibration absorbing slit S, the rigidity around the fitting insertion hole is reduced, and by providing a so-called damper function, the vibrations from the above two propagation paths are absorbed and the vibration level is increased. To reduce the noise of the self-priming pump A.

As shown in FIGS. 1 and 2, the mounting portion 5a in this embodiment is for a motor for connecting a motor provided around the impeller mounting shaft insertion hole 5e provided in the central portion of the pump mounting plate 5. It has a fixture insertion hole 5c and a pump fixture insertion hole 5d for connecting the pump main body, which is provided in the peripheral portion of the pump attachment plate 5, and the vibration absorbing slit S is a motor fixture insertion hole. The mounting portion 5a having 5c is drilled.

Further, as shown in FIG. 2, the mounting portions 5a having the motor mounting tool insertion holes 5c are provided at four positions around the impeller mounting shaft insertion hole 5e at regular intervals.
The pump mounting plate 5 can be securely connected to the.

Further, as shown in FIG. 3, the mounting portion 5a having the mounting hole 5c for each motor mounting member has a bulge portion b formed on the motor side of the pump mounting plate 5, and the vibration absorbing slit S is formed. At the base of the bulging portion b.

In this embodiment, two such vibration absorbing slits S are formed in one mounting portion 5a, and each of them is formed in an arc shape so as to surround the motor mounting tool insertion hole 5c, and further, It is drilled on a concentric circle.

Therefore, the vibration from the motor 1 side and the vibration from the pump body a side are absorbed by the vibration absorbing slit S, and the noise prevention effect can be enhanced.

Further, the vibration absorbing slits S provided on the peripheral edges of the respective motor mounting tool insertion holes 5c of the plurality of mounting portions 5a formed above have the peripheral edge drilling positions of the slits S corresponding to the respective insertion holes 5c. Of the peripheral edge of each vibration absorbing slit S with respect to the motor attachment insertion hole 5c.

That is, the two vibration absorbing slits S
Are arranged concentrically with respect to the respective motor fitting insertion holes 5c and are arranged on the same circumference, and the vibration absorbing slits S are arranged on the same circumference, respectively. The drilling positions are different in the circumferential direction.

As described above, the vibration absorbing slit S is provided at the same distance from the motor mounting tool insertion hole 5c, and the slit S allows the motor mounting tool insertion hole 5c.
The vibrations propagated from the can be uniformly absorbed in all directions, and the two vibration absorbing slits S can surely absorb the vibrations.

In this embodiment, as shown in FIG. 2, among the four bulging portions b formed at the upper, lower, left and right positions of the impeller mounting shaft insertion hole 5e, the upper and lower bulging portions b are for motors. Fixture insertion hole
Circular arc-shaped vibration absorbing slits S are bored so as to be located on the upper side and the lower side of 5c. An arc-shaped vibration absorbing slit S is provided.

Therefore, in the vicinity of the mounting portion 5a, it is possible to absorb the vibration propagated through the motor mounting screw 71 inserted into the motor mounting member insertion hole 5c without being biased vertically or horizontally. The effect can be fully achieved and the noise prevention effect can be enhanced.

As described above, the vibration absorbing slit S is provided to weaken the rigidity of the mounting portion 5a so as to have a damper function. 5a The original function, that is, the assembling of the motor 1 and the pump main body a, is set to such a size that there is no problem in terms of strength.

FIG. 4 shows a modification, in which three vibration absorbing slits S are provided.

Also in this case, each vibration absorbing slit S is
Each of them is formed in an arc shape, is concentric with the motor fixture insertion hole 5c, and is arranged on the same circumference,
In addition, the peripheral edge drilling positions of the respective vibration absorbing slits S with respect to the motor fixture insertion hole 5c are made different in the circumferential direction on the same circumference. Therefore, the same effect as the above example is obtained.

With the above-described structure, the strength of the pump mounting plate 5 is not impaired, the noise of the self-priming pump A can be greatly reduced, and a quiet self-priming pump suitable for home use is provided. It is possible to provide the suction pump A.

The operation of the self-priming pump A configured as described above will be described below.

That is, when the motor 1 is driven after the priming water is injected into the casing cover 3 to penetrate into the impeller chamber 21, the impeller 4 rotates.

By the rotation of the impeller 4, the air in the water suction passage 32 is sucked into the impeller chamber 21, and the water in the impeller chamber 21 is mixed with the air. The chamber 21 → the water supply chamber 22 → the upper communication hole 6d → the steam / water separator flows, and the air / water is separated in the steam / water separator, and the air is discharged from the water supply port 33.

Then, the remaining water is in the tank chamber 34 → communication hole 6a.
→ impeller chamber 21 and tank chamber 34 → circulation chamber 35 → communication hole 6b →
Flows to the impeller chamber 21 and returns to the impeller chamber 21 again.

That is, water flows from the impeller chamber 21 to the tank chamber 34.
Therefore, the air is discharged to the outside, and eventually the air pressure in the water absorption path decreases, causing a pressure difference with the outside.

Due to this pressure difference, water can flow into the impeller chamber 21 from the water inlet 31 and absorb water.

The sucked water flows from the water supply chamber 22 through the upper communication hole 6d into the tank chamber 34, is supplied from the water supply port 33, and functions as a pump. At this time, a part of the water flows from the tank chamber 34 and the circulation chamber 35 to the communication hole 6
It flows back into the impeller chamber 21 through a and 6b.

During the above-described operation of the pump, the pump mounting plate 5
Is the vibration propagating from the pump body a side, and the impeller 4
Although the vibrations propagated from the motor 1 side via the impeller mounting shaft 1a and the vibrations from the two propagation paths are received, the vibration absorbing slits S are provided to absorb the vibrations and reduce the noise. It can be reduced.

Further, even if the vibration absorbing slit S is formed, the pump mounting plate 5 can firmly connect the motor 1 and the pump main body a without impairing the strength of the entire pump.

Next, another embodiment shown in FIGS. 5 to 7 and 8 will be described.

In FIGS. 5 to 7, the mounting portion 5a of the pump mounting plate 5 is a smooth surface and the spacer d is provided instead of forming the bulging portion b in comparison with the previous embodiment. In this case as well, the same effect as in the previous embodiment can be produced.

In the structure shown in FIG. 8, the vibration absorbing slits S formed in an arc shape are respectively inserted into the motor fitting insertion holes.
It is provided concentrically with respect to 5c, but not on the same circumference but on a double circumference.

Also in this case, the peripheral edge drilling positions of the respective vibration absorbing slits S with respect to the motor fitting insertion hole 5c are made different in the circumferential direction on the same circumference.

Therefore, similarly to the first embodiment, the vibration propagating through the motor mounting screw 71 inserted in the motor mounting hole 5c can be absorbed without deviation and the damper effect can be sufficiently obtained. Can be fulfilled.

By the way, in each of the above-mentioned embodiments, the vibration absorbing slit S is provided only around the motor fitting insertion hole 5c, and is not provided around the pump fitting insertion hole 5d.
It can also be provided around the pump fitting insertion hole 5d.

However, it has been experimentally confirmed that even if the vibration absorbing slit S is provided around the pump fixture insertion hole 5d, it does not significantly contribute to the noise prevention effect.

Therefore, by providing the vibration absorbing slit S only around the motor fitting insertion hole 5c, it is possible to sufficiently secure the strength of the entire pump and to effectively prevent noise.

The fitting insertion hole is not limited to a circular shape, and a triangular shape, a quadrangular shape, or the like can similarly produce the effects of the present invention.

[0076]

As described above, the present invention has the following effects.

In a pump device in which a motor and a pump body are connected by a fixture such as a screw via a pump attachment plate having an attachment portion having an attachment insertion hole, the attachment insertion hole of the attachment portion is surrounded. By providing a vibration absorbing slit in this state, it is possible to give a damper function to a part of the pump mounting plate while securing the strength of the entire pump, and absorb the vibration propagating from the mounting portion to reduce noise. It can be lowered.

By forming a plurality of vibration absorbing slits at intervals so as to follow the shape of the fixture insertion hole, the vibration absorption slits are provided at positions approximately the same distance from the fixture insertion hole. Therefore, it is possible to uniformly absorb the vibration propagated from the fitting insertion hole and enhance the noise prevention effect.

Further, the vibration transmitted from the fitting insertion hole can be reliably absorbed.

By providing a plurality of mounting portions on the pump mounting plate in a state of being separated from each other, and providing a vibration absorbing slit on each mounting portion, the pump mounting plate can be reliably connected to the motor, and It is possible to effectively prevent noise.

A vibration absorbing slit is provided at the periphery of each fitting insertion hole of the plurality of mounting portions, and the peripheral edge drilling position of the vibration absorption slit for each fitting insertion hole is set to the vibration for each other fitting insertion hole. By making the position different from the peripheral edge drilling position of the absorption slit, it is possible to absorb the vibration propagating from the fixture insertion hole in the vicinity of the attachment part without being biased, thereby enhancing the noise prevention effect. .

The mounting portion has a motor mounting tool insertion hole for connecting the motor provided in the central portion of the pump mounting plate and the pump mounting tool insertion hole for connecting the pump body provided in the peripheral portion of the pump mounting plate. The slit for vibration absorption is formed in the mounting portion having the mounting hole for the motor mounting member, thereby effectively preventing noise while sufficiently maintaining the strength of the entire pump. be able to.

Since the fitting insertion hole is provided in the bulging portion formed on the pump mounting plate and the vibration absorbing slit is provided at the base of the bulging portion, the pump mounting plate can be reliably connected to the motor. In addition, the vibration from the motor side and the vibration from the pump body side can be absorbed three-dimensionally, and the noise prevention effect can be enhanced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a self-priming pump having a pump device according to the present invention.

FIG. 2 is an explanatory diagram of a pump mounting plate of the self-priming pump.

FIG. 3 is a sectional view taken along line I-I of FIG.

FIG. 4 is an explanatory diagram showing one form of a vibration absorbing slit.

FIG. 5 is an explanatory diagram showing a pump device according to another embodiment.

FIG. 6 is an explanatory view of the pump mounting plate.

7 is a cross-sectional view taken along the line I-I of FIG.

FIG. 8 is an explanatory diagram of a pump mounting plate according to another embodiment.

FIG. 9 is an exploded perspective view showing a conventional pump device.

FIG. 10 is an explanatory view of the pump mounting plate.

11 is a cross-sectional view taken along the line I-I of FIG.

FIG. 12 is an explanatory view showing a pump mounting plate provided with a circular hole of a conventional pump device.

FIG. 13 is an explanatory view showing a pump mounting plate provided with the same elongated hole.

[Explanation of symbols]

 1 Motor 5 Pump mounting plate 5a Mounting part 5c Motor mounting tool insertion hole 5d Pump mounting tool insertion hole S Vibration absorption slit a Pump body b Swelling part

Claims (6)

[Claims] 1. A pump mounting plate in which a motor (1) and a pump body (a) are formed with a mounting portion (5a) having a mounting tool insertion hole.
In the pump device connected via a fitting such as a screw via (5), a vibration absorbing slit (S) is formed in a state of surrounding the fitting insertion hole of the mounting portion (5a). Pump device. 2. The pump device according to claim 1, wherein a plurality of the vibration absorbing slits (S) are provided at intervals along the shape of the fitting insertion hole. 3. The pump mounting plate (5) is provided with a plurality of mounting portions (5a) spaced apart from each other, and each mounting portion (5a)
The pump device according to claim 1 or 2, characterized in that each of them is provided with a vibration absorbing slit (S). 4. A vibration absorbing slit (S) is provided at a peripheral edge of each fitting insertion hole of the plurality of mounting portions (5a), and a peripheral edge of the vibration absorption slit (S) is provided to each fitting insertion hole. The position of each vibration absorption slit with respect to other fixture insertion holes
4. The pump device according to claim 3, wherein the pumping position is different from the peripheral hole drilling position of (S). 5. The mounting part (5a) has a motor mounting part insertion hole (5c) for connecting the motor (1) provided in the central part of the pump mounting plate (5), and the pump mounting plate (5c). Pump body insertion hole (5d) for connecting the pump body (a) connected to the periphery of 5)
And a slit for vibration absorption as described above.
(S) is the mounting part (5a) that has the mounting hole (5c) for the motor
The pump device according to any one of claims 1 to 4, wherein the pump device is provided in the pump device. 6. The pump mounting plate (5) is provided with the mounting member insertion hole.
6. The vibration absorbing slit (S) is provided at the base of the bulging portion (b) formed at the same time, and the vibration absorbing slit (S) is provided at the base of the bulging portion (b). Pump device.