CN116658458A - Double-motor impeller structure - Google Patents
Double-motor impeller structure Download PDFInfo
- Publication number
- CN116658458A CN116658458A CN202310612455.8A CN202310612455A CN116658458A CN 116658458 A CN116658458 A CN 116658458A CN 202310612455 A CN202310612455 A CN 202310612455A CN 116658458 A CN116658458 A CN 116658458A
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- China
- Prior art keywords
- motor
- impeller
- driving shaft
- bearing
- drive shaft
- Prior art date
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- Pending
Links
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of compressor equipment production and manufacturing, in particular to a double-motor impeller structure, which comprises an integrated bearing and an impeller set, wherein a first motor driving shaft and a second motor driving shaft are respectively arranged at two ends of the integrated bearing, the first motor driving shaft and the second motor driving shaft are respectively connected with a first driving motor and a second driving motor, the impeller set is connected in the middle of the integrated bearing, the integrated bearing is simultaneously driven by the driving motors at two ends through driving the two motor driving shafts, and the motors at two sides are simultaneously driven at the same speed to drive the impeller set to stably work, so that the purposes of improving the performance of a compressor and prolonging the service life of the compressor are finally achieved.
Description
Technical Field
The invention relates to the technical field of compressor equipment production and manufacturing, in particular to a double-motor impeller structure.
Background
The centrifugal compressor is one of the core equipment in the fields of important petrochemical equipment, coal chemical equipment, oil gas transportation, refrigeration low temperature and the like, is a heart for ensuring the stable operation of the whole equipment, and can be divided into a centrifugal compressor, an axial flow compressor and an axial flow centrifugal combined compressor according to the main direction of medium movement, wherein the centrifugal compressor is a vane type rotary machine, the pressure and the kinetic energy of the fluid are improved by utilizing the interaction of vanes and the fluid, and the fluid is decelerated by utilizing a through flow element, so that the kinetic energy is converted into the pressure improvement. The existing centrifugal compressor is very wide in application range, is commonly used for compressing media such as air, water vapor, ammonia gas and the like, the core part of the centrifugal compressor is very critical in control of rotation of a rotor, a common compressor impeller is controlled by a single motor only, the rotor can be prevented from running smoothly, even a bearing is damaged, and the service life of the centrifugal compressor is shortened.
For example, chinese patent publication No. CN112901521a, entitled "a high-speed centrifugal compressor", discloses a high-speed centrifugal compressor including a motor, a left-side compressor, and a right-side compressor, the motor including a motor housing, a rotor, a radial bearing, a motor flange, a right-side motor end cover, a left-side motor end cover, the right-side compressor including a first impeller, a first volute, and a first lock nut, the left-side compressor including a second impeller, a second volute, and a second lock nut. According to the invention, the motor end cover and the diffuser plane of the compressor are integrated, so that the space arrangement of the compressor is more compact, the problems that the aerodynamic efficiency of the existing compressor is low, the axial length is too long, and the limit rotation speed of a rotor cannot be too high are solved, but the impeller part of a core is not improved, a single motor is still used for controlling the impeller, the problems described in the background are not solved, and the hidden danger that the impeller and the bearing are damaged and the service life of the compressor is shortened is also solved.
Disclosure of Invention
Aiming at the problems in the background art, the invention provides a double-motor impeller structure, and the double motors are matched with impeller groups to use an integrated bearing, so that the service life of a compressor is prolonged, the impeller is protected, and the performance of the compressor is obviously improved.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a two motor impeller structures, includes integral type bearing and impeller group, integral type bearing both ends be equipped with first motor drive shaft and second motor drive shaft respectively, first motor drive shaft and second motor drive shaft connect first driving motor and second driving motor respectively, impeller group connect the middle part at integral type bearing, integral type bearing simultaneously by the driving motor at both ends through two motor drive shaft drive of drive, both sides motor drive simultaneously at the same speed, drive impeller group steady operation, finally reach the effect purpose that realizes improving the compressor performance, extension compressor life.
Preferably, the two ends of the integral bearing are respectively provided with a first motor driving shaft and a second motor driving shaft, the first motor driving shaft and the second motor driving shaft are respectively connected with a first driving motor and a second driving motor, the impeller set is connected to the middle of the integral bearing, so that the bearing and the impeller set are stressed the same when the double-motor driving is ensured, the impeller set works more stably, and the inertia caused by the motor driving to the integral bearing is buffered.
Preferably, the integrated bearing comprises a main shaft and a main shaft sleeve, the main shaft sleeve is sleeved with the main shaft, high-speed bearings are arranged at two ends of the main shaft, and axial support is provided for the integrated bearing, so that the integrated bearing runs in a stable balance state, and a certain precision requirement is met.
Preferably, the impeller set comprises a first impeller and a second impeller, the impeller set is sleeved on the spindle sleeve, the directions of blades of the two impellers are opposite, the directions of the blades of the two impellers are opposite to each other, and the opposite design of the blades can enhance the performance of the compressor and enhance the flow guiding effect, so that the running efficiency of the integrated bearing is enhanced.
Preferably, one end of the integrated bearing is provided with a compression ring, the other end of the integrated bearing is provided with a bulge, the compression ring is sleeved at the first impeller end on the main shaft, the compression ring applies pressure to the integrated bearing, stability is enhanced for operation of the integrated bearing, and the bulge provides a function of positioning and fixing the integrated bearing in the shaft sleeve.
Preferably, the first motor drive shaft is connected with the first drive shaft sleeve, the second motor drive shaft is connected with the second drive shaft sleeve, the first drive shaft sleeve and the second drive shaft sleeve are respectively arranged at two ends of the integrated bearing, and are indirectly connected with the integrated bearing through the drive shaft and the drive shaft sleeve, so that an excessive link exists in the whole driving process, the phenomenon that other parts on equipment are damaged due to overlarge inertia caused by overhigh rotating speed of the motor is avoided, and the integrated bearing is protected.
Preferably, the first driving shaft sleeve and the second driving shaft sleeve are respectively provided with a plurality of adjusting holes and adjusting grooves at the periphery, the adjusting holes can be used for adjusting shafting balance weights, a plurality of adjusting holes can be formed, the adjusting holes are adjusted according to actual conditions by rotating different angles, and the adjusting grooves provide an effect for the whole heat dissipation of the device.
Preferably, the first driving shaft sleeve and the second driving shaft sleeve are respectively provided with a cavity, the cavities are respectively positioned between the driving shaft of the first motor and the main shaft and between the driving shaft of the second motor and the main shaft, and the cavities are reserved in a reserved space between the bearing and the driving shaft, so that the purposes of reducing friction and abrasion during shaft movement are achieved, and meanwhile, when the equipment is in operation, air quantity can be introduced into the cavities and then discharged from the adjusting holes on the driving shaft sleeve.
Preferably, the first driving shaft sleeve and the second driving shaft sleeve are respectively provided with a floating gap at the joint of the first motor driving shaft, the second motor driving shaft and the main shaft, and the floating gaps are arranged so as to reduce damage to the bearing as much as possible when the torque is overlarge.
Preferably, the first motor driving shaft and the second motor driving shaft are both connected to the geometric center of the motor cover, and positioning edges are arranged on the periphery of the first motor driving shaft and the second motor driving shaft, so that the first motor driving shaft and the second motor driving shaft can be matched with the respective driving shaft sleeves for positioning and mounting.
Therefore, the invention has the following beneficial effects:
1. by setting the cavity and the adjusting hole on the shaft sleeve, the heat radiation performance of the invention is obviously improved compared with the prior art;
2. by driving the double motors, the invention greatly improves the running efficiency of the compressor;
3. through the arrangement of double motor driving, the invention is suitable for large-scale application, and has longer working capacity than the common compressor with a single motor driving impeller;
4. the invention also prolongs the service life of the compressor bearing by replacing the design of directly driving the bearing by the motor in a mode of indirectly driving the driving shaft by the motor.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a self-contained schematic of the present invention;
FIG. 3 is an exploded view of the present invention;
FIG. 4 is a front view of the present invention;
FIG. 5 is a side view of the present invention;
fig. 6 is a cross-sectional view of a first drive shaft sleeve connection of the present invention.
Illustration of: the integrated bearing 1, the main shaft 1.1, the main shaft sleeve 1.2, the high-speed bearing 1.3, the bulge 1.4, the impeller set 2, the first impeller 2.1, the second impeller 2.2, the first driving shaft sleeve 3, the second driving shaft sleeve 4, the first motor driving shaft 5, the second motor driving shaft 6, the first driving motor 7, the second driving motor 8, the adjusting hole 9, the adjusting groove 10, the compression ring 11, the cavity 12, the floating gap 13, the positioning edge 14 and the motor cover 15.
Detailed Description
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, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary for the purpose of illustrating the invention and are not to be construed as limiting the invention, it being obvious that the described embodiments are only some, but not all, of the embodiments of the invention.
Referring to fig. 1, 2 and 3, a dual-motor impeller structure comprises an integral bearing 1 and an impeller set 2, wherein the integral bearing 1 is respectively provided with a first motor driving shaft 5 and a second motor driving shaft 6 at two ends, the first motor driving shaft 5 and the second motor driving shaft 6 are respectively driven by a first driving motor 7 and a second driving motor 8, the impeller set 2 is installed at the middle position of the integral bearing 1, and the integral structure is basically symmetrical.
Referring to fig. 1, the integral bearing 1 comprises a main shaft 1.1 and a main shaft sleeve 1.2, wherein the main shaft sleeve 1.2 is sleeved with the main shaft 1.1, and high-speed bearings 1.3 are arranged at two ends of the main shaft 1.1. The high-speed bearing is a special bearing which is specially used for bearing axial force, namely a bearing with force in the direction of parallel axes, and has the function of a thrust bearing. One end of the integrated bearing 1 is provided with a compression ring 11, the other end of the integrated bearing is provided with a bulge 1.4, and the compression ring 11 is sleeved at the end of a first impeller 2.1 on the main shaft 1.1. Optionally, the thrust ball bearing can only bear axial load, the unidirectional thrust ball bearing can only bear axial load in one direction, and the unidirectional thrust ball bearing can limit axial displacement of the shaft and the shell in one direction; the thrust roller bearing is used for bearing axial load-based axial and radial combined load, has lower friction factor, higher rotating speed and aligning performance, can reduce the relative sliding of rollers and roller paths in operation, has long rollers, large diameters, large number of rollers and high load capacity, is usually lubricated by oil, can be lubricated by grease under the condition of low speed, can bear unidirectional axial load, has much higher axial load capacity than the thrust ball bearing, and has high rigidity and small axial space occupation. The thrust cylindrical roller bearing and the thrust needle roller bearing are suitable for occasions with low rotating speeds, the rotating speed of the thrust tapered roller bearing is slightly higher than that of the thrust cylindrical roller bearing, and the thrust tapered roller bearing and the thrust needle roller bearing can be selected according to different conditions.
The impeller set 2 consists of a first impeller 2.1 and a second impeller 2.2, the impeller set 2 is sleeved on the spindle sleeve 1.2, the directions of the two impeller blades are opposite, and the two impeller blades are designed to be opposite to each other and are combined together, so that the gas flow rates at two sides of the impeller set 2 are different in the operation process of the compressor, the pressure of the bearing is reduced, the gas flow guiding effect is obviously improved, and the operation efficiency of the whole mechanism is improved. The first motor driving shaft 5 is connected with the first driving shaft sleeve 3, the second motor driving shaft 6 is connected with the second driving shaft sleeve 4, and the first driving shaft sleeve 3 and the second driving shaft sleeve 4 are respectively arranged at two ends of the integrated bearing 1; the first motor driving shaft 5 and the second motor driving shaft 6 are respectively connected with a first driving motor 7 and a second driving motor 8, and the two driving motors drive the main shaft 1.1 of the integrated bearing 1 to rotate by simultaneously driving the respective driving shafts, so as to finally drive the impeller set 2 to work. At the same time, the first drive shaft sleeve 3, the second drive shaft sleeve 4 and the main shaft sleeve 1.2 also provide external axial support for the integrated bearing 1, and the high-speed bearing 1.1 also provides internal axial support for the integrated bearing 1. Therefore, the design of the axial supporting mechanisms at the inner and outer sides of the two ends of the integrated bearing 1 also greatly improves the stability of the compressor bearing and protects the bearing in operation.
Referring to fig. 4 and 6, the first driving shaft sleeve 3 and the second driving shaft sleeve 4 are provided with a plurality of adjusting holes 9 and adjusting grooves 10 on the periphery, and the adjusting holes 9 can adjust different angles according to the requirements to adjust the balance weight of shafting balance; when the motor drives the driving shaft and the integrated bearing 1 to rotate at a high speed, the regulating groove 10 can generate a certain amount of air quantity in the radial direction to form an air curtain, isolate heat generated in the motor and ensure the normal operation of the impeller set 2. The first driving shaft sleeve 3 and the second driving shaft sleeve 4 are respectively provided with a cavity 12, the cavities 12 are respectively positioned between the first motor driving shaft and the main shaft 1.1 and between the second motor driving shaft 5 and the main shaft 1.1, the first driving shaft sleeve 3 and the second driving shaft sleeve 4 are respectively provided with a floating gap 13 at the joint of the first motor driving shaft 5, the second motor driving shaft 6 and the main shaft, the cavities 12 are provided with a margin for installation, and the floating gap 13 can play a role in preventing bearing damage and protecting the integral bearing 1 when the condition of overlarge power and overlarge torque is met.
Referring to fig. 1 to 5, the first motor driving shaft 5 and the second motor driving shaft 6 are connected with a motor cover 15, the first motor driving shaft 5 and the second motor driving shaft 6 are provided with positioning edges 14 at the periphery, the two driving shafts are inserted into the central part of the motor cover 15 to form connection, and the positioning edges 14 enable the first motor driving shaft 5 and the second motor driving shaft 6 to form limit fixation with the rotor part of the motor connected with each other.
In addition to the above embodiments, the technical features of the present invention may be rearranged and combined to form new embodiments within the scope of the claims and the disclosure of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments or equivalents may be substituted for some of the technical features thereof, and therefore, embodiments of the present invention not described in detail should be considered as specific embodiments of the present invention and are within the scope of the invention.
Claims (9)
1. The double-motor impeller structure is characterized by comprising an integrated bearing (1) and an impeller group (2);
a first motor driving shaft (5) and a second motor driving shaft (6) are respectively arranged at two ends of the integrated bearing (1);
the first motor driving shaft (5) and the second motor driving shaft (6) are respectively connected with a first driving motor (7) and a second driving motor (8);
the impeller group (2) is connected to the middle part of the integral bearing (1).
2. The double-motor impeller structure according to claim 1, wherein the integrated bearing (1) comprises a main shaft (1.1) and a main shaft sleeve (1.2), the main shaft sleeve (1.2) is sleeved with the main shaft (1.1), and high-speed bearings (1.3) are arranged at two ends of the main shaft (1.1).
3. A dual motor impeller structure according to claim 1 or 2, characterized in that the impeller set (2) comprises a first impeller (2.1) and a second impeller (2.2), the impeller set (2) is sleeved on the spindle sleeve (1.2), and the directions of the blades of the two impellers are opposite.
4. A dual motor impeller structure according to claim 1 or 2, characterized in that one end of the integral bearing (1) is provided with a compression ring (11), the other end is provided with a protrusion (1.4), and the compression ring (11) is sleeved at the end of the first impeller (2.1) on the main shaft (1.1).
5. The double-motor impeller structure according to claim 1, wherein the first motor driving shaft (5) is connected with the first driving shaft sleeve (3), the second motor driving shaft (6) is connected with the second driving shaft sleeve (4), and the first driving shaft sleeve (3) and the second driving shaft sleeve (4) are respectively arranged at two ends of the integrated bearing (1).
6. A double motor impeller structure according to claim 1 or 5, characterized in that the first drive shaft sleeve (3) and the second drive shaft sleeve (4) are provided with a number of adjusting holes (9) and adjusting grooves (10) at the periphery.
7. A double motor impeller structure according to claim 1 or 5, characterized in that the first drive shaft sleeve (3) and the second drive shaft sleeve (4) are each provided with a cavity (12), the cavities (12) being located between the first motor drive shaft and the main shaft (1.1) and between the second motor drive shaft (5) and the main shaft (1.1), respectively.
8. A double motor impeller structure according to claim 1 or 5, characterized in that the first drive shaft sleeve (3) and the second drive shaft sleeve (4) are provided with floating clearances (13) at the joints with the first motor drive shaft (5), the second motor drive shaft (6) and the main shaft.
9. A double motor impeller structure according to claim 1 or 5, characterized in that the first motor drive shaft (5) and the second motor drive shaft (6) are both connected to the geometric center of the motor cover (15), and that the first motor drive shaft (5) and the second motor drive shaft (6) are provided with positioning edges (14) at the outer periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310612455.8A CN116658458A (en) | 2023-05-29 | 2023-05-29 | Double-motor impeller structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310612455.8A CN116658458A (en) | 2023-05-29 | 2023-05-29 | Double-motor impeller structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116658458A true CN116658458A (en) | 2023-08-29 |
Family
ID=87709103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310612455.8A Pending CN116658458A (en) | 2023-05-29 | 2023-05-29 | Double-motor impeller structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116658458A (en) |
-
2023
- 2023-05-29 CN CN202310612455.8A patent/CN116658458A/en active Pending
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