CN211901053U - Centrifugal refrigerant pump and motor fixing structure thereof - Google Patents
Centrifugal refrigerant pump and motor fixing structure thereof Download PDFInfo
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- CN211901053U CN211901053U CN202020297942.1U CN202020297942U CN211901053U CN 211901053 U CN211901053 U CN 211901053U CN 202020297942 U CN202020297942 U CN 202020297942U CN 211901053 U CN211901053 U CN 211901053U
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Abstract
The utility model discloses a centrifugal refrigerant pump and motor fixed knot constructs thereof, centrifugal refrigerant pump includes: the device comprises a first machine frame and a second machine frame, wherein the first machine frame is provided with a first accommodating cavity, and the second machine frame is provided with a second accommodating cavity; the first rack and the second rack are coaxially and hermetically connected, so that the first accommodating cavity and the second accommodating cavity form a motor fixing cavity together; the pump shell is hermetically connected to one end, away from the second rack, of the first rack; the wiring shell cover is hermetically connected to one end, away from the first rack, of the second rack; the motor is arranged in the motor fixing cavity; a drive shaft in interference fit with a rotor of the motor; and the first frame and the second frame are respectively provided with a first bearing and a second bearing. The utility model discloses can improve the axiality of drive shaft and pump case, guarantee pump body moving reliability.
Description
Technical Field
The utility model relates to a refrigeration plant field especially relates to a centrifugal refrigerant pump and motor fixed knot constructs thereof.
Background
Centrifugal pumps are widely used in various industries, and centrifugal refrigerant pumps are increasingly used in the field of air conditioning refrigeration. In the field of air conditioning refrigeration, centrifugal refrigerant pumps need to ensure high reliability, mainly to avoid refrigerant leakage. The centrifugal refrigerant pump adopted in the prior art comprises a centrifugal shield pump and a centrifugal magnetic pump, the centrifugal shield pump has the problems of incomplete sealing and refrigerant leakage in the operation process, the refrigerant needs to be supplemented regularly, and the maintenance cost is inevitably increased. The radial load of the centrifugal magnetic pump is very small, the requirement on the coaxiality of the inner magnetic rotor and the outer magnetic rotor is very high, and the price is relatively high.
The stator of the centrifugal pump motor is usually in interference fit with the housing, and the stator is usually placed in the housing by means of hot-sleeving or cold-pressing. When the jacket is heated, the shell expands due to heating, so that the fit clearance is increased. However, if the heat is not uniform, the expansion and deformation of the housing are different, and the cooling is accompanied by a pressing force. The way of cold pressing the motor stator is subject to a larger extrusion force, which has a bad influence on the iron loss of the motor. Due to the existence of extrusion force, the inner circular surface of the motor stator deforms, so that the roundness of the inner circular surface is poor, the noise is influenced when the motor runs, and the performance of the motor is influenced.
In a utility model named "a totally-enclosed vane type novel refrigerant pump" (application number: 201420769830.6), a motor is fixed in a pump body through a motor bracket. As will be understood by those skilled in the art based on the disclosure, the motor and the motor bracket are necessarily fixed by cold pressing or hot sleeving, and the motor bracket is required to be fixed to the front end cover and the rear end cover, respectively, which undoubtedly increases the difficulty of the assembly process, and hardly ensures the coaxiality of the driving shaft and the pump casing, which directly affects the reliability of the normal operation of the pump, and if the coaxiality is poor, the impeller of the pump will be jammed by friction with the casing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough among the above-mentioned prior art, provide a centrifugal refrigerant pump and motor fixed knot constructs to improve the axiality of drive shaft and pump case, guarantee pump body moving reliability.
To achieve the above object, according to an aspect of the present invention, there is provided a centrifugal refrigerant pump including:
the device comprises a first machine frame and a second machine frame, wherein the first machine frame is provided with a first accommodating cavity, and the second machine frame is provided with a second accommodating cavity; the first rack and the second rack are coaxially and hermetically connected, so that the first accommodating cavity and the second accommodating cavity form a motor fixing cavity together;
the pump shell is hermetically connected to one end, away from the second rack, of the first rack;
the wiring shell cover is hermetically connected to one end, away from the first rack, of the second rack;
the motor is arranged in the motor fixing cavity;
a drive shaft in interference fit with a rotor of the motor; a first bearing and a second bearing are respectively arranged on the first rack and the second rack; a first end of the drive shaft is connected to the first bearing, and a second end of the drive shaft is connected to the second bearing; and
an impeller rotatably disposed within the pump housing and coupled to the first end of the drive shaft.
The utility model discloses an in an embodiment, the fixed intracavity of motor is equipped with the round spacing groove, the outer wall of motor be equipped with the spacing groove spacing arch of cooperateing, spacing arch inlay in the spacing inslot.
In an embodiment of the present invention, the limiting groove is formed by a first inner shoulder formed at the edge of the first accommodating cavity and a second inner shoulder formed at the edge of the second accommodating cavity, and the first inner shoulder and the second inner shoulder are sealed and spliced.
The utility model discloses an in an embodiment, the first bottom that holds the chamber is equipped with a plurality of first refrigerant through-holes, the pump case passes through first refrigerant through-hole intercommunication the fixed chamber of motor.
The utility model discloses an in the embodiment, the bottom that the chamber was held to the second is equipped with a plurality of second refrigerant through-holes, the fixed chamber of motor passes through second refrigerant through-hole intercommunication the wiring cap with space between the second frame.
In an embodiment of the present invention, the pump housing is provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant flows into the centrifugal refrigerant pump from the refrigerant inlet and flows out only from the refrigerant outlet.
In an embodiment of the present invention, an impeller abutting portion communicated with the refrigerant inlet is disposed in the pump case, and the impeller is rotatably connected to the impeller abutting portion.
In an embodiment of the present invention, the wiring housing is provided with a sealing terminal, and the motor is connected to the sealing terminal through a lead.
In an embodiment of the present invention, the centrifugal refrigerant pump further comprises a plurality of support structures, the support structures include a support portion coupled to the outer wall of the frame, and a footing formed at both ends of the support portion.
According to another aspect of the present invention, there is provided a motor fixing structure, which includes a first frame and a second frame; the first frame is provided with a first accommodating cavity, and the second frame is provided with a second accommodating cavity; the first rack and the second rack are coaxially and hermetically connected, so that the first accommodating cavity and the second accommodating cavity form a motor fixing cavity together; the motor fixing cavity is internally provided with a circle of limiting groove, and the limiting groove is matched with the outer wall of the motor.
The utility model provides a motor installation is fixed in the fixed intracavity of motor that first frame and second frame sealing connection formed, can avoid making casing extrusion stator and to the harmful effects that the motor caused because traditional shrink fit technology to guarantee the performance of motor. Compare current centrifugal refrigerant pump, the utility model discloses the axiality of drive shaft and pump case is showing and is improving, can guarantee pump body moving reliability. Furthermore, the utility model discloses centrifugal refrigerant pump's simple structure, the installation and the location of motor are very convenient, do not need extra bearing frame and solitary casing, can greatly reduce the complexity of the pump body, are fit for big batch industrial production.
Drawings
Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
Fig. 1 is a perspective view of a centrifugal refrigerant pump according to an embodiment of the present invention.
Fig. 2 is a sectional view of the centrifugal refrigerant pump shown in fig. 1.
Fig. 3 is a schematic view of the installation of the centrifugal refrigerant pump motor shown in fig. 1.
Fig. 4 is a schematic view of the connection of a first housing to a second housing in the centrifugal refrigerant pump of fig. 1.
Fig. 5 is a first angular schematic view of a first housing of the centrifugal refrigerant pump of fig. 1.
Fig. 6 is a second angular schematic view of the first housing of the centrifugal refrigerant pump of fig. 1.
Fig. 7 is a first angular schematic view of a pump casing of the centrifugal refrigerant pump of fig. 1.
Fig. 8 is a second angular schematic view of a pump casing of the centrifugal refrigerant pump of fig. 1.
Fig. 9 is a first angular schematic view of a connector housing cover in the centrifugal refrigerant pump of fig. 1. And
fig. 10 is a second angular view of a wire connection housing cover of the centrifugal refrigerant pump of fig. 1.
Reference numerals
1 Wiring casing cover
101 sealed terminal
102 steel needle
2 Pump case
201 impeller butt joint part
202 refrigerant inlet
203 refrigerant outlet
3 first frame
31 first accommodation chamber
311 first inner shoulder
32 first bearing mounting hole
33 first external shoulder
34 first refrigerant through hole
4 second frame
41 second accommodating cavity
411 second inner shoulder
42 second bearing mounting hole
43 second outer shoulder
5 rotor
6 stator
7 first bearing
8 second bearing
9 drive shaft
10 impeller
11 supporting structure
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
Fig. 1 is a perspective view of a centrifugal refrigerant pump according to an embodiment of the present invention. Fig. 2 is a sectional view of the centrifugal refrigerant pump shown in fig. 1. Fig. 3 is a schematic view of the installation of the centrifugal refrigerant pump motor shown in fig. 1. Fig. 4 is a schematic view of the connection of a first housing to a second housing in the centrifugal refrigerant pump of fig. 1. Fig. 5 is a first angular schematic view of a first housing of the centrifugal refrigerant pump of fig. 1. Fig. 6 is a second angular schematic view of the first housing of the centrifugal refrigerant pump of fig. 1. Fig. 6 is a first angular schematic view of a pump casing of the centrifugal refrigerant pump of fig. 1. Fig. 7 is a second angular schematic view of a pump casing of the centrifugal refrigerant pump of fig. 1. Fig. 8 is a first angular schematic view of a connector housing cover in the centrifugal refrigerant pump of fig. 1. And FIG. 9 is a second angular view of a wire connection housing cover of the centrifugal refrigerant pump of FIG. 1. According to an aspect of the present invention, there is provided a centrifugal refrigerant pump, as shown in fig. 1 to 9, comprising a first frame 3, a second frame 4, a pump housing 2, a wiring housing cover 1, a motor, a drive shaft 9, and an impeller 10. The first frame 3 is formed with a first accommodating chamber 31, and the second frame 4 is formed with a second accommodating chamber 41; the first frame 3 and the second frame 4 are coaxially and hermetically connected, so that the first accommodating cavity 31 and the second accommodating cavity 41 jointly form a motor fixing cavity; the pump shell 2 is connected with one end of the first frame 3, which is far away from the second frame 4 in a sealing way; the wiring shell cover 1 is hermetically connected to one end, away from the first rack 3, of the second rack 4; the motor is arranged in the motor fixing cavity; the driving shaft 9 is in interference fit with the rotor 5 of the motor; a first bearing 7 and a second bearing 8 are respectively arranged on the first frame 3 and the second frame 4; a first end of the driving shaft 9 is connected to the first bearing 7, and a second end of the driving shaft 9 is connected to the second bearing 8; the impeller 10 is rotatably disposed within the pump housing 2 and is connected to a first end of the drive shaft 9.
The utility model provides a motor installation is fixed in the fixed intracavity of motor that first frame 3 and 4 sealing connection of second frame formed, can avoid because traditional shrink fit technology makes casing extrusion stator 6 and to the harmful effects that the motor caused to guarantee the performance of motor. Compare current centrifugal refrigerant pump, the utility model discloses well drive shaft 9 is showing with the axiality of pump case 2 and is improving, can guarantee pump body moving reliability. Furthermore, the utility model discloses centrifugal refrigerant pump's simple structure, the installation and the location of motor are very convenient, do not need extra bearing frame and solitary casing, can greatly reduce the complexity of the pump body, are fit for big batch industrial production.
Referring to fig. 2 to 5, a circle of limiting groove is disposed in the motor fixing cavity, a limiting protrusion matched with the limiting groove is disposed on an outer wall of the motor, and the limiting protrusion is embedded in the limiting groove. Further, the limiting groove is formed by sealing and splicing a first inner shoulder 311 formed at the edge of the first accommodating cavity 31 and a second inner shoulder 411 formed at the edge of the second accommodating cavity 41.
Further, one end of the first frame 3, which is away from the second frame 4, is further provided with a first external shoulder 33, so as to be connected with the pump housing 2 in a sealing manner. And a second outer shoulder 43 is arranged at one end of the second rack 4, which is far away from the first rack 3, and is used for being hermetically connected with the wiring shell cover 1. Optionally, the bottom of the first frame 3 is provided with a first bearing mounting hole 32 for mounting and fixing the first bearing 7. The bottom of the second frame 4 is provided with a second bearing mounting hole 42 for mounting and fixing the second bearing 8. Although not separately shown, the second frame 4 has a structure shown in fig. 2, 3 and 4, and the second inner shoulder and the second outer shoulder have structures identical to those of the first inner shoulder and the first outer shoulder, as shown in fig. 5.
Referring to fig. 1, 2, 7 and 8, in the centrifugal refrigerant pump of the present invention, the pump housing 2 is provided with a refrigerant inlet 202 and a refrigerant outlet 203, and the refrigerant flows into the centrifugal refrigerant pump from the refrigerant inlet 202 and flows out only from the refrigerant outlet 203. The refrigerant inlet 202 and the refrigerant outlet 203 are both arranged on the pump shell 2, which is beneficial to improving the refrigeration efficiency of the air conditioning system.
Further, an impeller abutting portion 201 communicating with the refrigerant inlet 202 is provided in the pump housing 2, and the impeller 10 is rotatably connected to the impeller abutting portion 201. Whereby the transfer efficiency of the refrigerant can be improved.
As shown in fig. 2 to 6, a plurality of first refrigerant through holes 34 are formed in the bottom of the first accommodating cavity 31, and the pump housing 2 is communicated with the motor fixing cavity through the first refrigerant through holes 34. Part of the refrigerant in the pump shell 2 flows into the motor fixing cavity through the first refrigerant through hole 34, so that the temperature of the motor can be reduced. The bearing can also adopt an oilless bearing, and the refrigerant flowing into the motor fixing cavity replaces lubricating oil to play a role in lubrication, so that adverse effects on the heat exchange of the air conditioning system due to the use of the lubricating oil are avoided. Optionally, the bottom of the first accommodating cavity 31 is provided with a plurality of first refrigerant through holes 34, and the plurality of first refrigerant through holes 34 are uniformly distributed at the bottom of the first accommodating cavity 31, so that the refrigerant can be promoted to flow in the motor fixing cavity in a circulating manner. Furthermore, a plurality of second refrigerant through holes are formed in the bottom of the second accommodating cavity 41, and the motor fixing cavity is communicated with a space between the wiring shell cover 1 and the second rack 4 through the second refrigerant through holes. The refrigerant in the motor fixing cavity flows to the wiring shell cover 1 through the second refrigerant through hole, so that the flowing space of the refrigerant is further enlarged practically, and the high-pressure resistance of the pump is improved. Optionally, the bottom of the second accommodating cavity 41 is provided with a plurality of second refrigerant through holes, and the plurality of second refrigerant through holes are uniformly distributed at the bottom of the second accommodating cavity 41. This can further promote the circulation of the refrigerant in the entire centrifugal refrigerant pump.
As shown in fig. 1, 2, 9 and 10, a sealing terminal 101 is provided on the terminal cover 1, and the motor is connected to the sealing terminal 101 through a lead. Further, as shown in fig. 1, 7 and 8, the terminal cover 1 may be integrally formed with the hermetic terminal 101. Of course, the terminal housing cover 11 may also be welded to the sealing terminal 101. As long as the two can be hermetically connected. The sealed wiring terminal 101 is provided with a steel needle 102, and two ends of the steel needle 102 are used for connecting a lead wire to connect a motor and an external power supply. The steel pin 102 is integrally formed with the sealing post 101, so that leakage of refrigerant therefrom can be prevented.
As shown in fig. 1 and 2, the centrifugal refrigerant pump further comprises a plurality of support structures 11, wherein the support structures 11 comprise support portions matched with the outer wall of the frame, and feet formed at two ends of the support portions, and the feet can be provided with bolt holes, so that the feet can be fixed through bolts.
In summary, the utility model provides a motor installation is fixed in the fixed intracavity of the motor that first frame 3 and second frame 4 sealing connection formed, can avoid because traditional shrink fit technology makes casing extrusion stator 6 and to the harmful effects that the motor caused to guarantee the performance of motor. Compare current centrifugal refrigerant pump, the utility model discloses well drive shaft 9 is showing with the axiality of pump case 2 and is improving, can guarantee pump body moving reliability. Furthermore, the utility model discloses centrifugal refrigerant pump's simple structure, the installation and the location of motor are very convenient, do not need extra bearing frame and solitary casing, can greatly reduce the complexity of the pump body, are fit for big batch industrial production. Further, the utility model provides a centrifugal refrigerant pump can adapt to the transmission demand of refrigeration air conditioner field to the refrigerant, possesses the operational capability that lasts reliable and stable. First, the utility model discloses well first frame passes through first outer shoulder sealing connection is in the pump case, and the second frame passes through second outer shoulder sealing connection is in the wiring cap, compares the refrigerant pump that current refrigeration air conditioner field used, can effectively avoid the refrigerant to leak. Secondly, the utility model provides a motor installation is fixed in the fixed intracavity of the motor that first frame 3 and 4 sealing connection of second frame formed, can guarantee the axiality of motor and pump case 2 and impeller 10, and the reliability is higher. Once more, the utility model discloses centrifugal refrigerant pump is favorable to improving air conditioning system's refrigeration efficiency on all locating pump case 2 with refrigerant import 202 and refrigerant export 203. Finally, the utility model provides a drive shaft 9 with first bearing 7 and second bearing 8 are direct to be realized lubricated through the refrigerant, can avoid using lubricating oil and produce adverse effect to air conditioning system's heat transfer.
According to another aspect of the present invention, there is provided a motor fixing structure, as shown in fig. 3 to 6, including a first frame 3 and a second frame 4; the first frame 3 is formed with a first accommodating chamber 31, and the second frame 4 is formed with a second accommodating chamber 41; the first frame 3 and the second frame 4 are coaxially and hermetically connected, so that the first accommodating cavity 31 and the second accommodating cavity 41 jointly form a motor fixing cavity; the motor fixing cavity is internally provided with a circle of limiting groove, and the limiting groove is matched with the outer wall of the motor. The utility model provides a motor installation is fixed in the fixed intracavity of motor that first frame 3 and 4 sealing connection of second frame formed, can avoid because traditional shrink fit technology makes casing extrusion stator 6 and to the harmful effects that the motor caused to guarantee the performance of motor. Compare current centrifugal refrigerant pump, the utility model discloses can improve the axiality of drive shaft 9 and pump case 2 and show the improvement, can guarantee pump body moving reliability. Furthermore, the utility model has the advantages of simple structure, the installation and the location of motor are very convenient, do not need extra bearing frame and solitary casing, can greatly reduce the complexity of the pump body, are fit for big batch industrial production.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. A centrifugal refrigerant pump, comprising:
the device comprises a first machine frame and a second machine frame, wherein the first machine frame is provided with a first accommodating cavity, and the second machine frame is provided with a second accommodating cavity; the first rack and the second rack are coaxially and hermetically connected, so that the first accommodating cavity and the second accommodating cavity form a motor fixing cavity together;
the pump shell is hermetically connected to one end, away from the second rack, of the first rack;
the wiring shell cover is hermetically connected to one end, away from the first rack, of the second rack;
the motor is arranged in the motor fixing cavity;
a drive shaft in interference fit with a rotor of the motor; a first bearing and a second bearing are respectively arranged on the first rack and the second rack; a first end of the drive shaft is connected to the first bearing, and a second end of the drive shaft is connected to the second bearing; and
an impeller rotatably disposed within the pump housing and coupled to the first end of the drive shaft.
2. The centrifugal refrigerant pump as claimed in claim 1, wherein a circle of limiting grooves are formed in the motor fixing cavity, and a limiting protrusion is formed on the outer wall of the motor and is matched with the limiting grooves, and the limiting protrusion is embedded in the limiting grooves.
3. A centrifugal refrigerant pump according to claim 2, wherein the limiting groove is formed by a first inner shoulder formed at an edge of the first receiving chamber and a second inner shoulder formed at an edge of the second receiving chamber being sealingly engaged.
4. The centrifugal refrigerant pump as claimed in claim 1, wherein the bottom of the first accommodating chamber is provided with a plurality of first refrigerant through holes, and the pump casing is communicated with the motor fixing chamber through the first refrigerant through holes.
5. The centrifugal refrigerant pump as claimed in claim 4, wherein a plurality of second refrigerant through holes are formed in a bottom of the second accommodating chamber, and the motor fixing chamber communicates with a space between the terminal housing cover and the second housing through the second refrigerant through holes.
6. A centrifugal refrigerant pump according to claim 1, wherein said pump casing is provided with a refrigerant inlet port and a refrigerant outlet port, refrigerant flowing into the centrifugal refrigerant pump from said refrigerant inlet port and flowing out only from said refrigerant outlet port.
7. A centrifugal refrigerant pump as recited in claim 6 wherein an impeller interface is provided in said pump housing in communication with said refrigerant inlet, said impeller being rotatably connected to said impeller interface.
8. The centrifugal refrigerant pump of claim 1, wherein a sealing terminal post is provided on the terminal housing cover, and the motor is connected to the sealing terminal post by a lead wire.
9. The centrifugal refrigerant pump of claim 1, further comprising a plurality of support structures, the support structures including a support portion that mates with the frame outer wall, and feet formed at both ends of the support portion.
10. A motor fixing structure is characterized by comprising a first rack and a second rack; the first frame is provided with a first accommodating cavity, and the second frame is provided with a second accommodating cavity; the first rack and the second rack are coaxially and hermetically connected, so that the first accommodating cavity and the second accommodating cavity form a motor fixing cavity together; the motor fixing cavity is internally provided with a circle of limiting groove, and the limiting groove is matched with the outer wall of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020297942.1U CN211901053U (en) | 2020-03-11 | 2020-03-11 | Centrifugal refrigerant pump and motor fixing structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020297942.1U CN211901053U (en) | 2020-03-11 | 2020-03-11 | Centrifugal refrigerant pump and motor fixing structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211901053U true CN211901053U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020297942.1U Active CN211901053U (en) | 2020-03-11 | 2020-03-11 | Centrifugal refrigerant pump and motor fixing structure thereof |
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| Country | Link |
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| CN (1) | CN211901053U (en) |
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2020
- 2020-03-11 CN CN202020297942.1U patent/CN211901053U/en active Active
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