CN212115075U - External sleeve type cooler structure of canned motor pump - Google Patents
External sleeve type cooler structure of canned motor pump Download PDFInfo
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- CN212115075U CN212115075U CN202021030839.7U CN202021030839U CN212115075U CN 212115075 U CN212115075 U CN 212115075U CN 202021030839 U CN202021030839 U CN 202021030839U CN 212115075 U CN212115075 U CN 212115075U
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- motor
- cooler
- jacket
- sleeve type
- clamp cover
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Abstract
The utility model relates to a shield pump motor external telescope-feed cooler structure, cooling jacket contain interior clamp cover (1) and outer clamp cover (2), and the both ends of interior clamp cover (1) and outer clamp cover (2) all weld annular end links (3), and interior clamp cover (1) and outer clamp cover (2) are cavity sandwich structure. The utility model provides a detailed explanation to the material, effect, structure and the build-up welding mode of outside sleeve formula cooler, solve canned motor pump motor at the too high technological problem of operation in-process stator temperature rise. The utility model discloses simple structure, simple to operate to outside telescopic cooler can not bring negative effects to the motor performance, is favorable to the promotion of the efficiency of motor and the optimal design of motor structure.
Description
Technical Field
The utility model relates to a shield pump motor outside telescopic cooler structure.
Background
The rotor of the canned motor and the impeller of the pump share one shaft and are placed in the high-temperature and high-pressure reactor coolant. A thin shielding sleeve is arranged outside a rotor core and inside a stator core of a canned motor pump to isolate fluid conveyed by the pump so as to protect a stator and the rotor core of the motor from being eroded by the fluid. The shield cavity is in communication with the pump cavity and is subject to the system pressure of the fluid. The operation environment of the canned motor is more severe than that of the common asynchronous motor. The temperature rise of the motor needs to be cooled by circulating cooling water in the motor, and corresponding cooling measures need to be carried out outside a stator shell of the motor in order to ensure reliable operation of the motor and ensure that the temperature rise of the motor in the operation process is within an allowable value range.
At present, a cooler is additionally arranged outside a motor for cooling the motor in most of shielded motors. With the progress of technology, some canned motors in recent years are greatly different from the conventional canned motors in the application place and operation condition. The canned motor pump is a core component of the reactor coolant pump and operates in the high-temperature, high-pressure reactor coolant. The design of the canned motor pump requires the adoption requirement of 60-year maintenance-free, and aims to solve the problem that the temperature rise value of the canned motor pump is in an allowable range in the operation process, ensure the safe and reliable operation of the motor, and ensure that the motor cannot be shut down and maintained due to temperature rise exceeding in the design life and the adoption requirement of 60-year maintenance-free. The design of the structure of the external sleeve type cooler of the motor of the canned motor pump utilizes the sleeve sleeved outside the motor stator shell to cool the motor, and the sleeve sleeved outside the motor stator shell can be regarded as an additional cooling for the motor to limit the temperature rise of the motor besides the external cooling of the canned motor, so as to limit the internal temperature rise value of the motor and ensure that the design requirement of 60-year maintenance-free can be realized.
The invention content is as follows:
the utility model aims at providing a shield pump motor outside telescopic cooler structure can guarantee the inseparable combination of this cooler and motor, can effectively prevent again that the friction between cooling jacket and the stator casing can not guarantee to prevent the axial displacement that the cooling jacket was pressed from both sides, improves the influence of this cooling jacket's adoption life-span. The technical scheme of the utility model is that: a cooling jacket comprises an inner jacket 1 and an outer jacket 2, annular end rings 3 are welded at two ends of the inner jacket 1 and the outer jacket 2, the inner jacket 1 and the outer jacket 2 are both of a hollow sandwich structure, the other side of the end rings 3 is welded and fixed on a welding seam of a stator casing 4 and a lower flange 5 by adopting discontinuous welding seams, an outer sleeve type cooler 6 is sleeved on the outer diameter of the stator casing 4, a first flange 7 is arranged at the upper part of the side wall of the outer sleeve type cooler, and a second flange 8 is communicated and arranged on the side wall of the lower part of the outer sleeve type cooler 6.
Two ends of the outer jacket of the cooling jacket are respectively provided with a drain plug 9.
The utility model discloses the theory of operation:
the utility model relates to a make a shield pump motor outside telescopic cooler structure, according to shield motor's stator casing size that designs and the tight volume cooperation condition between the telescopic cooler structure of outside, its structure is shown in figure 2. The reactor cooling pump motor includes an outer sleeve cooler that fits over the outside diameter of the stator housing by tight fit. The cooling jacket comprises an inner jacket and an outer jacket, both ends of the jacket being welded to annular end rings. The cooling jacket has a shrink fit that is attached to the weld of the stator case lower flange at the other side of the end ring by a discontinuous weld. Heat is conducted from the stator casing to the cooling water, and the water is introduced into and discharged from the cooling jacket through two water flanges. The cooling jacket has a drain plug at both ends of the outer jacket as shown in fig. 1.
The utility model has the advantages that:
the external sleeve type cooling device is made of stainless steel materials with different grades, and an opening is adopted at a welding interface of the water flange for reinforcement. A cooling sleeve is sleeved on the shell of the shielding motor, so that a heavy guarantee is added to the cooling of the shielding motor. The motor can be cooled by a traditional external cooler, and the motor shell can be cooled by an external sleeve type cooler, so that the temperature rise of a motor stator is reduced, the running and the safety reliability of the motor are effectively guaranteed, and the motor can not be shut down and maintained and has no need of maintenance for 60 years due to temperature rise overrun in the design life. The external sleeve type cooler is simple, is matched with the stator shell through the sleeving tightening amount, is tightly sleeved and welded on the shell to ensure that the pump keeps mechanical integrity to the maximum extent during working.
Drawings
FIG. 1 is an enlarged view of the fitting of the outer sleeve cooler and the stator casing
FIG. 2 is a schematic view of an external sleeve cooler
FIG. 3 is a sectional view of the outer sleeve cooler
Detailed Description
The structure of the external sleeve type cooler of the canned motor pump shown in figure 1 comprises an inner jacket 1 and an outer jacket 2, wherein annular end rings 3 are welded at both ends of the inner jacket 1 and the outer jacket 2, the inner jacket 1 and the outer jacket 2 are both of hollow sandwich structures, the other side of the end ring 3 is welded and fixed on the welding seam of a stator casing 4 and a lower flange 5 by adopting discontinuous welding seams, an external sleeve type cooler 6 is sleeved on the outer diameter of the stator casing 4, as shown in figure 3, a first flange 7 is arranged at the upper part of the side wall of the external sleeve type cooler, and a second flange 8 is communicated and arranged on the lower side wall of the external sleeve type cooler 6.
Two ends of the outer jacket of the cooling jacket are respectively provided with a drain plug 9.
The design of the shielded motor requires no maintenance for 60 years, which has strict requirements on the temperature rise of the motor in operation. As shown in fig. 2, in the above-described structure of the external sleeve cooler for the canned motor pump, both ends of the inner jacket 1 and the outer jacket 2 are welded to the annular end ring 3. And the other side of the end ring 3 is welded to the weld of the stator shell 4 and the lower flange 5 by using discontinuous weld seams. The outer sleeve type cooler is sleeved outside the stator casing through a tight amount, the inner jacket, the outer jacket, the water flange and the end ring of the cooler are made of stainless steel with different brands, and the properties of the material are taken from 2007-2008 supplementary edition of ASME regulations. And one end of each side end ring is fixed with a flange on the stator shell by welding. The working procedure is matched with the sleeving tightening amount of the cooler, and the movement of the cooling sleeve on the shaft caused by friction force in the running process of the motor can be effectively counteracted. The requirement for the integrity of the whole motor in the running process of the motor can be ensured.
The external sleeve type cooler is sleeved on a stator shell of the shielded motor, and when the external sleeve type cooler is designed, in order to meet the requirement of the strength of the external sleeve type cooler, the external sleeve type cooler needs to be capable of bearing the temperature and pressure of cooling water in the operation process of the cooler and meeting the requirement of the temperature of the cooling water under different working conditions. Firstly, selecting proper stainless steel material, wherein the material property is in accordance with the requirement of corresponding ASME regulation.
The utility model discloses an in, this cooler part all adopts the stainless steel material of different trademarks, carries out corresponding opening reinforcement at the welded position of water flange.
According to the requirements of the size and the design specification of the outer sleeve type cooler designed in the figure 1, the calculation of the thickness and the weld joint strength of the inner and outer jackets and the reinforcement of the opening of the water flange at the welding position on the inner and outer jackets select the stainless steel material which meets the design specification and the requirement, and the welding, the processing and the performance test are completed; the size and thickness of the outer sleeve type cooler are determined by groping different thicknesses, welding seam positions and welding seam sizes of the inner and outer sleeves, and the trial production of products is completed.
The external sleeve type cooler is matched with the stator casing in a sleeving manner, so that the mechanical integrity of the pump is kept to the maximum extent during working, the limitation of the temperature rise of the motor is also ensured, and the technical problem that the motor is free of maintenance for 60 years is solved to the maximum extent.
Claims (2)
1. A structure of an external sleeve type cooler of a canned motor pump is characterized in that: the cooling jacket comprises an inner jacket (1) and an outer jacket (2), annular end rings (3) are welded at two ends of the inner jacket (1) and the outer jacket (2), the inner jacket (1) and the outer jacket (2) are both of a hollow sandwich structure, the other side of each end ring (3) is welded and fixed on a weld joint of the stator casing (4) and the lower flange (5) by adopting a discontinuous weld joint, an outer sleeve type cooler (6) is sleeved on the outer diameter of the stator casing (4), a first flange (7) is installed on the upper part of the side wall of the outer sleeve type cooler (6), and a second flange (8) is communicated and installed on the side wall of the lower part of the outer sleeve type cooler (6).
2. The structure of the outer sleeve cooler for the canned motor pump according to claim 1, wherein: two ends of the outer jacket of the cooling jacket are respectively provided with a drain plug (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021030839.7U CN212115075U (en) | 2020-06-08 | 2020-06-08 | External sleeve type cooler structure of canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021030839.7U CN212115075U (en) | 2020-06-08 | 2020-06-08 | External sleeve type cooler structure of canned motor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212115075U true CN212115075U (en) | 2020-12-08 |
Family
ID=73614466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021030839.7U Active CN212115075U (en) | 2020-06-08 | 2020-06-08 | External sleeve type cooler structure of canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212115075U (en) |
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2020
- 2020-06-08 CN CN202021030839.7U patent/CN212115075U/en active Active
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