CN210623107U - Cryogenic immersed pump and motor thereof - Google Patents

Abstract

A cryogenic immersed pump and a motor thereof, the cryogenic immersed pump comprises a pump shaft, an end cover, a motor, a pressure-bearing shell and an inlet volute which are arranged in sequence, the pressure-bearing shell is internally provided with an impeller which is arranged on the pump shaft, the motor comprises a motor shell, a motor stator and a motor rotor which are arranged in the motor shell, the motor rotor is arranged on a pump shaft of the deep cooling immersed pump, the motor stator is arranged outside the motor rotor and positioned between the motor rotor and the motor shell, the motor stator also comprises a motor fixing structure, the motor fixing structure comprises an interference connecting mechanism and a secondary fastening mechanism, the interference connecting mechanism is positioned on the circumferential surface of the combination of the motor stator and the motor shell, the secondary fastening mechanism is arranged on the motor shell and is respectively connected and fixed with the motor stator and the motor shell. The utility model discloses simple to operate makes simply, and the operation is stable under the cryrogenic state.

Description

Cryogenic immersed pump and motor thereof

Technical Field

The utility model relates to an immersed pump, especially a cryrogenic immersed pump and motor with motor fixed knot constructs.

Background

At present, the cryogenic submerged motor is mainly fixed by two structures, one structure is a traditional hot-charging fixing mode, and the other structure is a fastener fixing mode.

The first fixing mode is mainly that a heating shell is installed at room temperature, the actual operation working condition is not considered, and the fixing failure can be caused under the condition of deep cooling; the second fixing mode mainly adopts the circumferential symmetric fixation of the fastener at normal temperature without considering the actual operation condition, so that the fixation failure under the condition of deep cooling is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the above-mentioned defect of prior art, provide a cryrogenic immersed pump with motor fixed knot constructs and motor thereof.

In order to realize the above-mentioned purpose, the utility model provides a motor of cryrogenic immersed pump, include motor casing and install motor stator and electric motor rotor in the motor casing, electric motor rotor installs on the pump shaft of cryrogenic immersed pump, motor stator installs electric motor rotor is outer and is located electric motor rotor with between the motor casing, wherein, still include motor fixed knot structure, motor fixed knot structure includes interference coupling mechanism and secondary fastening mechanism, interference coupling mechanism is located motor stator with on the periphery that motor casing combines, secondary fastening mechanism sets up on the motor casing and respectively with motor stator and motor casing are connected fixedly.

The interference magnitude between the motor stator and the motor shell in the interference connection mechanism is 0.01-0.15 mm.

The motor of the cryogenic immersed pump is characterized in that the secondary fastening mechanism is a fastener.

The motor of the cryogenic immersed pump, wherein the fastener comprises at least one row of set screws arranged along the axial direction of the motor housing.

The motor of the cryogenic immersed pump, wherein each row of the set screws comprises a plurality of set screws located on the same circumference of the motor housing.

The motor of the cryogenic immersed pump is characterized in that the plurality of set screws are 3-4 set screws uniformly distributed along the circumference of the motor shell.

In the motor of the cryogenic immersed pump, the fastening piece comprises two rows of fastening screws, and the circumferential surfaces where the two rows of fastening screws are located are parallel to each other.

In order to realize above-mentioned purpose better, the utility model also provides a cryrogenic immersed pump, end cover, motor, pressure-bearing casing and the entry volute that sets up including pump shaft and order, be provided with the impeller in the pressure-bearing casing, the impeller mounting be in on the pump shaft, wherein, the motor is foretell motor.

The cryogenic immersed pump further comprises an inducer which is arranged in the inlet volute and is arranged on the pump shaft.

In the cryogenic immersed pump, the impeller and the inducer are respectively mounted on the pump shaft through the fastening nuts.

The utility model has the beneficial effects that:

the utility model discloses the motor of cryrogenic immersed pump adopts the interference fit assembly and combines the fastener fixed, has solved the fixed mode of prior art cryrogenic immersed motor and has easily become invalid, unstable defect under the cryrogenic condition. The installation and the operation are convenient; the manufacture is simple; the operation is stable under the cryogenic state.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1 is a schematic structural diagram of a cryogenic immersed pump according to an embodiment of the present invention.

Wherein the reference numerals

1 Motor casing

2 Secondary fastening mechanism

3 electric machine stator

4 electric machine rotor

5 Pump shaft

6 end cap

7 inlet volute

8 impeller

9 inducer

10 pressure-bearing shell

11 interference connecting mechanism

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

referring to fig. 1, fig. 1 is a schematic structural diagram of a cryogenic immersed pump according to an embodiment of the present invention. The utility model discloses a cryrogenic immersed pump, including pump shaft 5 and the end cover 6, motor casing 1, pressure-bearing casing 10 and the entry volute 7 that the order is connected, end cover 6, motor casing 1, pressure-bearing casing 10 and the coaxial setting of entry volute 7 just enclose synthetic closed cavity jointly, pump shaft 5 sets up just support at motor casing 1's extension through the bearing in the closed cavity and serve, and this pump shaft 5 is used for transmitting the moment of torsion and drives impeller 8 rotatory. The motor comprises a motor shell 1, a motor used for providing power is installed in the motor shell 1, a motor shaft of the motor is coaxial with a pump shaft 5, namely the motor shaft and the pump shaft 5 are the same shaft, an impeller 8 used for improving liquid energy is installed on the pump shaft 5, the impeller 8 is preferably fixed on the pump shaft 5 through threads, and a plurality of pressure-bearing shells 10 and inlet volute shells 7 which are installed in sequence are arranged corresponding to the impeller 8 and used for collecting and conveying liquid. In this embodiment, the liquid pump further comprises an inducer 9 for increasing the energy of the inlet liquid, the inducer 9 is disposed in the inlet volute 7 and mounted on the pump shaft 5, the inlet volute 7 serves as a liquid inlet for collecting liquid, and the impeller 8 and the inducer 9 are preferably mounted on the pump shaft 5 through threads such as fastening nuts. The composition, structure, mutual position relation, the relation of connection and function etc. of this cryogenic immersed pump other parts are more ripe prior art, and the event is no longer repeated here, and it is only right below the utility model discloses a motor gives detailed explanation.

The utility model discloses a motor includes motor casing 1 and installs motor stator 3 and motor rotor 4 in motor casing 1, motor rotor 4 is installed on the pump shaft 5 of cryrogenic immersed pump, motor stator 3 is installed motor rotor 4 is outer and is located motor rotor 4 with between the motor casing 1 still includes motor fixed knot constructs, motor fixed knot constructs including interference coupling mechanism 11 and secondary fastening mechanism 2, interference coupling mechanism 11 is located motor stator 3 with on the periphery that motor casing 1 combines, secondary fastening mechanism 2 sets up motor casing 1 go up and respectively with motor stator 3 and motor casing 1 are connected, are used for fixing motor stator 3 and motor casing 1.

According to the size of the motor, the interference magnitude between the motor stator 3 and the motor shell 1 in the interference connection mechanism 11 is 0.01mm-0.15 mm. The secondary fastening mechanism 2 is a fastener. The fastening member includes at least one row of set screws arranged in the axial direction of the motor housing 1. Each row of the set screws includes a plurality of set screws located on the same circumference of the motor housing 1. The plurality of set screws are 3-4 set screws which are uniformly distributed along the circumference of the motor shell 1. The fastener comprises two rows of fastening screws, and the circumferential surfaces where the two rows of fastening screws are located are parallel to each other.

The utility model discloses accessible heating and refrigerated mode with motor stator 3 interference fit to motor casing 1 in to through fastener secondary fixed motor casing 1 and motor stator 3, with the requirement of the different operating modes under the adaptation cryrogenic state. Namely, the motor stator 3 and the motor housing 1 are assembled in an interference fit manner and are fixed by fastening screws. During operation, in cryogenic liquid, motor stator 3 and motor casing 1 are together firmly fixed through interference fit and fastener's effect, have avoided because of under the cryrogenic condition, the shrinkage of material changes, makes not hard up problem between motor stator 3 and the motor casing 1. After the three alternating current power supplies are connected, the pump shaft 5, the impeller 8 and the inducer 9 are driven to rotate by the motor rotor 4, and the cryogenic medium is conveyed.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims (10)

1. The utility model provides a motor of cryrogenic immersed pump, includes motor casing and installs motor stator and electric motor rotor in the motor casing, electric motor rotor installs on the pump shaft of cryrogenic immersed pump, motor stator installs electric motor rotor is outer and be located electric motor rotor with between the motor casing, its characterized in that still includes motor fixed knot and constructs, motor fixed knot constructs including interference coupling mechanism and secondary fastening mechanism, interference coupling mechanism is located electric motor stator with on the periphery that motor casing combines, secondary fastening mechanism sets up on the motor casing and respectively with motor stator and motor casing connect fixedly.

2. The motor of the cryogenic immersed pump according to claim 1, wherein interference between the motor stator and the motor housing in the interference coupling mechanism is 0.01mm to 0.15 mm.

3. The motor of a cryogenic submersible pump of claim 1 or 2 wherein the secondary fastening mechanism is a fastener.

4. The motor of a cryogenic submersible pump of claim 3, wherein the fasteners include at least one row of set screws disposed axially of the motor housing.

5. The motor of a cryogenic submersible pump of claim 4, wherein each row of the set screws includes a plurality of set screws located on the same circumference of the motor housing.

6. The motor of a cryogenic submersible pump of claim 5 wherein the plurality of set screws is 3-4 set screws evenly distributed along the circumference of the motor housing.

7. The electric motor of a cryogenic submersible pump of claim 6, wherein the fasteners comprise two rows of set screws having circumferential surfaces that are parallel to each other.

8. A cryogenic immersed pump, comprising a pump shaft, an end cover, a motor, a pressure-bearing shell and an inlet volute which are sequentially arranged, wherein an impeller is arranged in the pressure-bearing shell, and the impeller is installed on the pump shaft, and is characterized in that the motor is the motor according to any one of the claims 1 to 7.

9. The cryogenic immersed pump of claim 8, further comprising an inducer disposed within the inlet volute and mounted on the pump shaft.

10. The cryogenic immersed pump of claim 9, wherein the impeller and inducer are mounted on the pump shaft by respective fastening nuts.

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