CN215444423U

CN215444423U - Shielding pump

Info

Publication number: CN215444423U
Application number: CN202121757647.0U
Authority: CN
Inventors: 王国良; 汪细权; 陈智达; 郑坤祥; 朱飞龙; 吴平生
Original assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Current assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-01-07
Anticipated expiration: 2031-07-28

Abstract

The utility model belongs to the technical field of canned motor pumps, and discloses a canned motor pump, which comprises: a motor; the pump body comprises a pump shell and an impeller, the pump shell is fixed on the motor, and the impeller is in transmission connection with the motor; the impeller is arranged at one end, close to the water inlet channel, of the impeller, a conical inducer is arranged on the inner wall of the water inlet channel, and an annular groove is formed in the inner wall of the water inlet channel and located at the root of the conical inducer. The conical inducer can prevent carbon dioxide from directly colliding and rebounding with the impeller when entering, and the conical inducer can induce, so that rebounding is reduced, and cavitation resistance is improved; the reflux of the external force of the conical inducer is carried out in the annular groove, so that the impact with the incoming flow can be avoided, and the cavitation can be reduced. The pressure pipe can be with the pressure drainage to inhalant canal of exhalant canal, increases inhalant canal's pressure, avoids liquid because of pressure reduction vaporization.

Description

Shielding pump

Technical Field

The utility model belongs to the technical field of canned motor pumps, and particularly relates to a canned motor pump.

Background

Carbon dioxide refrigeration is a new safe and environment-friendly technology, a carbon dioxide medium is nonflammable and non-explosive, has no destructive effect on an ozone layer, is a gas naturally contained in the air, and has great advantages compared with liquid ammonia and freon. However, liquid carbon dioxide is very easily vaporized and conventional canned motor pumps cannot be used. The height and the liquid storage amount of the whole system are increased, so that the waste of raw materials is caused, the use environment is highly limited, and the raw materials cannot be directly used.

Therefore, a canned motor pump is needed to solve the above technical problems.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention is directed to a canned motor pump having a greatly improved cavitation resistance.

In order to achieve the purpose, the utility model adopts the following technical scheme:

there is provided a canned motor pump comprising:

a motor;

the pump body comprises a pump shell and an impeller, the pump shell is fixed on the motor, and the impeller is in transmission connection with the motor;

the impeller is arranged at one end, close to the water inlet channel, of the impeller, a conical inducer is arranged on the inner wall of the water inlet channel, and an annular groove is formed in the inner wall of the water inlet channel and located at the root of the conical inducer.

As a preferred technical solution of the canned motor pump, the pump body further includes a pressure pipe connecting the water inlet passage and the water outlet passage.

As a preferred technical scheme of canned motor pump, the motor includes casing, stator shielding cover and rotor shielding cover, the stator shielding cover sets up in the casing, rotor shielding cover part sets up with rotating in the stator shielding cover, the stator shielding cover includes the pivot, pivot fixed connection in the impeller.

As a preferred technical scheme of the canned motor pump, one end of the casing, which is far away from the pump body, is provided with an exhaust pipe.

As a preferable technical scheme of the canned motor pump, the bottom surfaces of the pump shell and the machine shell are arranged in a coplanar mode and are parallel to the rotating shaft.

Compared with the prior art, the utility model has the following beneficial effects:

the conical inducer can prevent carbon dioxide from directly colliding and rebounding with the impeller when entering, and the conical inducer can induce, so that rebounding is reduced, and cavitation resistance is improved; the reflux of the external force of the conical inducer is carried out in the annular groove, so that the impact with the incoming flow can be avoided, and the cavitation can be reduced. The pressure pipe can be with the pressure drainage to inhalant canal of exhalant canal, increases inhalant canal's pressure, avoids liquid because of pressure reduction vaporization. The two measures are matched to greatly improve the cavitation resistance.

Drawings

Fig. 1 is a schematic structural diagram of a canned motor pump according to the present invention.

Wherein, 1, a pressure pipe; 2. a conical inducer; 3. an annular groove; 4. a pump body; 5. and (4) exhausting the gas.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1, the present embodiment discloses a canned motor pump including a motor and a pump body 4.

The pump body 4 comprises a pump shell and an impeller, the pump shell is fixed on a motor, the impeller is in transmission connection with the motor, the motor comprises a machine shell, a stator shielding sleeve and a rotor shielding sleeve, and the pump shell is fixed and in sealing connection with the machine shell. The stator shielding sleeve is arranged in the machine shell, the rotor shielding sleeve is partially and rotationally arranged in the stator shielding sleeve, the stator shielding sleeve comprises a rotating shaft, and the rotating shaft is fixedly connected to the impeller.

Be provided with water inlet channel and exhalant canal on the pump case, the one end that the impeller is close to water inlet channel is provided with toper inducer 2, is provided with ring channel 3 on water inlet channel's the inner wall, and ring channel 3 is located the root of toper inducer 2.

The pump body 4 further comprises a pressure pipe 1 which is connected with the water inlet channel and the water outlet channel, and the pressure pipe 1 can enable carbon dioxide in the water outlet channel to flow back to the water inlet channel to supplement the pressure of the water inlet channel.

The end of the casing far away from the pump body 4 is provided with an exhaust pipe 5, the casing is provided with an exhaust hole which is connected with the exhaust pipe 5, gas generated by vaporization of liquid carbon dioxide is discharged in the use process of the canned motor pump, the impeller and the bearing of the canned motor pump cannot be damaged, and the canned motor pump can normally operate. After the canned motor pump is used, carbon dioxide in the canned motor pump is vaporized and then discharged through the exhaust pipe 5, so that the pressure in the canned motor pump is returned to normal pressure.

The bottom surfaces of the pump shell and the machine shell are arranged in a coplanar manner and are parallel to the rotating shaft, and the pump shell and the machine shell can be placed on the supporting frame.

The conical inducer 2 is arranged, so that the carbon dioxide can be prevented from directly colliding with the impeller to bounce when entering, the conical inducer 2 can induce, bounce is reduced, and cavitation resistance is improved; the backflow of the external force of the conical inducer 2 is carried out in the annular groove 3, so that the collision with the incoming flow can be avoided, and the cavitation can be reduced. The pressure pipe 1 can be with the pressure drainage to inhalant canal of exhalant canal, increases inhalant canal's pressure, avoids liquid because of pressure reduction vaporization.

When the liquid carbon dioxide is vaporized, the pressure in the pump body 4 acts on the exhaust pipe 5 to exhaust, so that the adverse effect of the carbon dioxide gas on the impeller and the bearing of the shield pump is avoided. The bottom surfaces of the pump shell and the machine shell are arranged in a coplanar manner, so that the pump shell and the machine shell can be placed on the support frame, the height can be reduced to the maximum extent, and the pressure of the water inlet channel is increased. The measures are combined to greatly improve the anti-cavitation performance, and the exhaust pipe 5 can exhaust even if less gas exists, so that the operation of the shield pump is not influenced.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A canned motor pump, comprising:

a motor;

the pump body (4) comprises a pump shell and an impeller, the pump shell is fixed on the motor, and the impeller is in transmission connection with the motor;

the impeller pump is characterized in that a water inlet channel and a water outlet channel are arranged on the pump shell, a conical inducer (2) is arranged at one end, close to the water inlet channel, of the impeller, an annular groove (3) is formed in the inner wall of the water inlet channel, and the annular groove (3) is located at the root of the conical inducer (2).

2. Canned pump according to claim 1, characterised in that the pump body (4) further comprises a pressure tube (1) connecting the water inlet channel and the water outlet channel.

3. The canned pump of claim 1, wherein the motor comprises a housing, a stator can disposed within the housing, and a rotor can partially rotationally disposed within the stator can, the stator can comprising a shaft fixedly connected to the impeller.

4. The canned motor pump according to claim 3, characterized in that the end of the housing remote from the pump body (4) is provided with an exhaust tube (5).

5. The canned motor pump of claim 3, wherein the pump housing and the bottom surface of the casing are arranged coplanar and parallel to the rotational axis.