A centrifugal compressor with a volute heat dissipation structure

Abstract

The present invention relates to a centrifugal compressor with a volute heat dissipation structure, and relates to the field of motor technology. The compressor comprises a motor system, an automatic balancing system, a first compression system, and a second compression system. The motor system has two output ends, and the motor system comprises a stator, a rotor device, a casing, two motor end covers, two bearings, two copper sleeves, two end cover inner covers, and two end cover outer covers. The stator is installed in the casing, the rotor device is installed on the corresponding motor end cover through each bearing, each copper sleeve is sleeved on the corresponding bearing, an oil supply channel is provided on the motor end cover, the oil supply channel is connected to an opening on the copper sleeve and an opening on an outer ring of the bearing, the copper sleeve is clearance-matched with the motor end cover, each end cover inner cover and each end cover outer cover are installed on both sides of the corresponding motor end cover, the automatic balancing system comprises a plurality of eccentric rings and a plurality of reference columns, each reference column is installed in the casing, and each eccentric ring is sleeved on the outside of the rotor device. The equipment has small impact and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a centrifugal compressor with a volute heat dissipation structure. Background Art

[0002] A centrifugal compressor is a type of turbine compressor that converts mechanical energy into gas pressure energy. Its working principle is to use a high-speed rotating impeller to perform work on the gas, using centrifugal force to compress the gas, increasing its pressure and kinetic energy. Subsequently, in the diffuser flow channel, this kinetic energy is converted into static pressure energy, further promoting the increase in gas pressure.

[0003] Centrifugal compressors play a vital role in modern industry due to their high efficiency, reliability, and high flow rates. They are widely used in various processes to convey air, various process gases, or mixed gases and increase their pressure. Furthermore, centrifugal compressors are commonly used in low-pressure air separation units and are gradually replacing piston compressors.

[0004] Existing centrifugal compressors still vibrate during operation due to dynamic balance issues due to the need for high-speed rotation of the rotor and impeller, which reduces the life of the equipment. Summary of the Invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides a centrifugal compressor with a volute heat dissipation structure, which has small equipment impact and long equipment life.

[0006] The technical solution adopted by the present invention is:

[0007] A centrifugal compressor with a volute heat dissipation structure includes a motor system, an automatic balancing system, a first compression system and a second compression system. The motor system has two output ends, the first compression system and the second compression system are installed on both sides of the motor system, and the first compression system and the second compression system are respectively connected to the corresponding output ends in a transmission manner. The motor system includes a stator, a rotor device, a casing, two motor end covers, two bearings, two copper sleeves, two end cover inner covers and two end cover outer covers. The rotor device forms two output ends, the stator is installed in the casing, the rotor device is installed on the corresponding motor end cover through each bearing, each copper sleeve is arranged on the corresponding bearing, the copper sleeve and the outer ring of the bearing are both provided with openings, and the motor end cover is provided with an oil supply channel, and the oil supply channel is connected to the opening on the copper sleeve and the oil supply channel. The opening on the outer ring of the bearing, the copper sleeve and the motor end cover are loosely matched, each end cover inner cover is installed on the side of the corresponding motor end cover close to the stator, and each end cover outer cover is installed on the side of the corresponding motor end cover away from the stator. The end cover inner cover and the end cover outer cover are both connected to the rotor device through a sealing sleeve. The automatic balancing system includes a plurality of eccentric rings and a plurality of reference columns, each of the reference columns is evenly installed in the casing along the inner side of the casing, and each of the eccentric rings is sleeved and installed outside the rotor device. The diameter of the cylindrical surface where the vertex of each reference column is located is defined as the first diameter, and the outer diameter of the eccentric ring is defined as the second diameter. The difference between the first diameter and the second diameter is equal to twice the gap between the copper sleeve and the motor end cover, and the distance between the center of the eccentric ring and the axis of rotation of the rotor device is less than the gap between the copper sleeve and the motor end cover.

[0008] Preferably, the first compression system includes a No. 1 volute end cover, a first volute, a first collector and a first impeller, the No. 1 volute end cover is mounted on the motor end cover, the first volute is mounted on the No. 1 volute end cover, the first collector is mounted on the side of the No. 1 volute end cover away from the motor end cover, the first collector is communicated with the first volute, the first impeller is mounted on the rotor device, the first impeller is located in the first collector, and the No. 1 volute end cover and the rotor device are sealed by a stepped sealing sleeve.

[0009] Preferably, the second compression system includes a No. 2 volute end cover, a second volute, a second collector and a second impeller, the No. 2 volute end cover is mounted on the motor end cover, the second volute is mounted on the No. 2 volute end cover, the second collector is mounted on the side of the No. 2 volute end cover away from the motor end cover, the second volute is connected to the second collector, the second impeller is mounted on the rotor device, the second impeller is located in the second collector, and the No. 2 volute end cover and the rotor device are sealed by a stepped sealing sleeve.

[0010] Preferably, the rotor device includes two output shafts and an intermediate sleeve, the two output shafts are mounted on both sides of the intermediate sleeve, and each eccentric ring sleeve is arranged outside the intermediate sleeve.

[0011] Preferably, the end of the oil supply channel of the motor end cover is provided with a flared pipe joint and an extended joint in sequence.

[0012] Preferably, the gap between the copper sleeve and the motor end cover is 0.2 mm to 0.4 mm.

[0013] Preferably, a plurality of pressure maintaining grooves are provided on one side of the copper sleeve close to the motor end cover.

[0014] Preferably, the mutually adjacent positions of the eccentric ring and the plurality of reference columns are all arc-shaped.

[0015] The beneficial effects of the present invention are:

[0016] The motor system has two output ends, the first compression system and the second compression system are installed on both sides of the motor system and the first compression system and the second compression system are respectively connected to the corresponding output ends, the motor system is used to drive the first compression system and the second compression system to compress gas, the motor system includes a stator, a rotor device, a casing, two motor end covers, two bearings, two copper sleeves, two end cover inner covers and two end cover outer covers, the rotor device forms two output ends, the stator is installed in the casing, the rotor device is installed on the corresponding motor end cover through each bearing, each copper sleeve is mounted on the corresponding bearing, the copper sleeve and the outer ring of the bearing are both provided with an opening, an oil supply channel is provided on the motor end cover, the oil supply channel is connected to the opening on the copper sleeve and the opening on the outer ring of the bearing, the copper sleeve and the motor end cover are clearance-matched, and pressurized lubricating oil injected from the oil supply channel enters the gap between the copper sleeve and the motor end cover, so that when the rotor device rotates, after the rotor device vibrates due to dynamic balance problems, the vibration of the rotor device is buffered because the gap between the copper sleeve and the motor end cover is filled with pressurized oil, and a heat dissipation effect is produced, thereby increasing the life of the equipment.

[0017] The inner cover of each end cover is installed on the side of the corresponding motor end cover close to the stator, and the outer cover of each end cover is installed on the side of the corresponding motor end cover away from the stator. The inner cover of the end cover and the outer cover of the end cover are connected to the rotor device through a sealing sleeve to prevent leakage of lubricating oil. The automatic balancing system includes a plurality of eccentric rings and a plurality of reference columns. Each reference column is evenly installed in the casing along the inner side of the casing, and each eccentric ring is sleeved and installed outside the rotor device. The diameter of the cylindrical surface where the vertex of each reference column is located is defined as the first diameter, and the outer diameter of the eccentric ring is defined as the second diameter. The difference between the first diameter and the second diameter is equal to twice the gap between the copper sleeve and the motor end cover. The distance between the center of the eccentric ring and the rotation axis of the rotor device is smaller than the gap between the copper sleeve and the motor end cover. When the rotor device vibrates, causing the rotation axis of the rotor device to deviate slightly, the reference column rubs the deviated eccentric ring, causing the eccentric ring to rotate. Since the eccentric ring rotates relative to the rotor device, the rotor device automatically adjusts the dynamic balance, the equipment has little impact, and the equipment life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 Enlarged schematic diagram of point A in the middle.

[0020] Figure 3 for Figure 1 Enlarged schematic diagram of point B in the middle.

[0021] Figure 4 This is a cross-sectional diagram of the automatic balancing system.

[0022] Description of reference numerals:

[0023] 1. Motor system; 11. Stator; 12. Rotor assembly; 121. Output shaft; 122. Intermediate sleeve; 13. Casing; 14. Motor end cover; 141. Oil supply channel; 15. Bearing; 16. Copper sleeve; 161. Pressure retaining groove; 17. End cover inner cover; 18. End cover outer cover;

[0024] 2. Automatic balancing system; 21. Eccentric ring; 22. Reference column;

[0025] 3. First compression system; 31. No. 1 volute end cover; 32. First volute; 33. First collector; 34. First impeller;

[0026] 4. Second compression system; 41. No. 2 volute end cover; 42. Second volute; 43. Second collector; 44. Second impeller. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings:

[0028] like Figure 1 — Figure 4 As shown, this embodiment provides a centrifugal compressor with a volute heat dissipation structure, including a motor system 1, an automatic balancing system 2, a first compression system 3 and a second compression system 4. The motor system 1 has two output ends, the first compression system 3 and the second compression system 4 are installed on both sides of the motor system 1, and the first compression system 3 and the second compression system 4 are respectively connected to the corresponding output ends. The motor system 1 is used to drive the first compression system 3 and the second compression system 4 to compress gas. The motor system 1 includes a stator 11, a rotor device 12, a casing 13, two motor end covers 14, two bearings 15, two copper sleeves 16, two end cover inner covers 17 and two end cover outer covers 18. The rotor device 12 forms two output ends, and the stator 11 is installed in the casing 13. The rotor device 12 is mounted on the corresponding motor end cover 14 through each bearing 15, and each copper sleeve 16 is sleeved on the corresponding bearing 15. The copper sleeve 16 and the outer ring of the bearing 15 are both provided with openings. The motor end cover 14 is provided with an oil supply channel 141, which is connected to the opening on the copper sleeve 16 and the opening on the outer ring of the bearing 15. The copper sleeve 16 and the motor end cover 14 are clearance-matched. The pressurized lubricating oil injected from the oil supply channel 141 enters the gap between the copper sleeve 16 and the motor end cover 14, so that when the rotor device 12 rotates, the rotor device 12 vibrates due to dynamic balance problems. The vibration of the rotor device 12 is buffered because the gap between the copper sleeve 16 and the motor end cover 14 is filled with pressurized oil, and a heat dissipation effect is produced, thereby increasing the service life of the equipment.

[0029] Each end cover inner cover 17 is installed on the side of the corresponding motor end cover 14 close to the stator 11, and each end cover outer cover 18 is installed on the side of the corresponding motor end cover 14 away from the stator 11. The end cover inner cover 17 and the end cover outer cover 18 are connected to the rotor device 12 through a sealing sleeve to prevent lubricating oil leakage. The automatic balancing system 2 includes a plurality of eccentric rings 21 and a plurality of reference columns 22. Each reference column 22 is evenly distributed and installed in the housing 13 along the inner side of the housing 13. Each eccentric ring 21 is sleeved and installed outside the rotor device 12. The diameter of the cylindrical surface where the vertex of each reference column 22 is located is defined as the first diameter. The diameter of the eccentric ring 21 is defined as the first diameter. The outer diameter is defined as the second diameter. The difference between the first diameter and the second diameter is equal to twice the gap between the copper sleeve 16 and the motor end cover 14. The distance between the center of the eccentric ring 21 and the rotation axis of the rotor device 12 is smaller than the gap between the copper sleeve 16 and the motor end cover 14. When the rotor device 12 vibrates, causing the rotation axis of the rotor device 12 to deviate slightly, the reference column 22 rubs against the deviated eccentric ring 21, causing the eccentric ring 21 to rotate. Since the eccentric ring 21 rotates relative to the rotor device 12, the rotor device 12 automatically adjusts the dynamic balance, the equipment has little impact, and the equipment life is long.

[0030] Please note that because the difference between the first diameter and the second diameter is equal to twice the gap between the copper sleeve 16 and the motor end cover 14, when the rotor device 12 rotates, if the rotor device 12 rotates smoothly, the eccentric ring 21 should not touch the reference column 22. When the rotor device 12 vibrates severely, the eccentric ring 21 will touch the reference column 22. It is worth noting that the side that touches the reference column 22 must be the heavier side of the rotor device 12. After the protruding eccentric ring 21 touches the reference column 22, the eccentric ring 21 will rotate so that the eccentric ring 21 will not be blocked by the reference column 22, and then the eccentric ring 21 passes through the position of the reference column 22, which causes the weight of the heavier side of the rotor device 12 to be reduced, thereby automatically adjusting the dynamic balance of the rotor device 12 and ensuring the smooth rotation of the rotor device 12.

[0031] Specifically, the first compression system 3 includes a No. 1 volute end cover 31, a first volute 32, a first collector 33 and a first impeller 34. The No. 1 volute end cover 31 is installed on the motor end cover 14, the first volute 32 is installed on the No. 1 volute end cover 31, the first collector 33 is installed on the side of the No. 1 volute end cover 31 away from the motor end cover 14, the first collector 33 is connected to the first volute 32, the first impeller 34 is installed on the rotor device 12, the first impeller 34 is located in the first collector 33, the No. 1 volute end cover 31 and the rotor device 12 are sealed by a stepped sealing sleeve, and the rotation of the first impeller 34 realizes primary pressurization.

[0032] Specifically, the second compression system 4 includes a No. 2 volute end cover 41, a second volute 42, a second collector 43 and a second impeller 44. The No. 2 volute end cover 41 is installed on the motor end cover 14, the second volute 42 is installed on the No. 2 volute end cover 41, and the second collector 43 is installed on the side of the No. 2 volute end cover 41 away from the motor end cover 14. The second volute 42 is connected to the second collector 43, and the air after one pressurization flows into the second collector 43. The second impeller 44 is installed on the rotor device 12, and the second impeller 44 is located in the second collector 43. The No. 2 volute end cover 41 and the rotor device 12 are sealed by a stepped sealing sleeve, and the rotation of the second impeller 44 realizes secondary pressurization.

[0033] Specifically, the rotor device 12 includes two output shafts 121 and an intermediate sleeve 122 . The two output shafts 121 are mounted on both sides of the intermediate sleeve 122 to ensure synchronous rotation of the two output shafts 121 . Each eccentric ring 21 is sleeved outside the intermediate sleeve 122 .

[0034] Specifically, the end of the oil supply channel 141 of the motor end cover 14 is provided with a flared pipe joint and an extended joint in sequence for oil intake.

[0035] Specifically, the gap between the copper sleeve 16 and the motor end cover 14 is 0.2 mm to 0.4 mm, thereby forming a buffer gap to prevent rigid collision and increase service life.

[0036] Specifically, a plurality of pressure-maintaining grooves 161 are provided on the side of the copper sleeve 16 close to the motor end cover 14. When the copper sleeve 16 vibrates, the pressure-maintaining grooves 161 block the outflow of the pressure oil and reduce the flow rate of the pressure oil, so that the pressure oil between the copper sleeve 16 and the motor end cover 14 can ensure sufficient oil pressure.

[0037] Specifically, the mutually adjacent positions of the eccentric ring 21 and the plurality of reference posts 22 are all arc-shaped, which reduces the impact force of collision and increases the service life.

[0038] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A centrifugal compressor with a volute heat dissipation structure, characterized in that: The invention comprises a motor system, an automatic balancing system, a first compression system and a second compression system, wherein the motor system has two output ends, the first compression system and the second compression system are installed on both sides of the motor system and the first compression system and the second compression system are respectively connected to the corresponding output ends in a transmission manner, the motor system comprises a stator, a rotor device, a casing, two motor end covers, two bearings, two copper sleeves, two end cover inner covers and two end cover outer covers, the rotor device forms two output ends, the stator is installed in the casing, the rotor device is installed on the corresponding motor end cover through each bearing, each copper sleeve is mounted on the corresponding bearing, the copper sleeve and the outer ring of the bearing are both provided with an opening, the motor end cover is provided with an oil supply channel, the oil supply channel is connected to the opening on the copper sleeve and the opening on the outer ring of the bearing , the copper sleeve is loosely matched with the motor end cover, each end cover inner cover is installed on the side of the corresponding motor end cover close to the stator, and each end cover outer cover is installed on the side of the corresponding motor end cover away from the stator, and the end cover inner cover and the end cover outer cover are both connected to the rotor device through a sealing sleeve, and the automatic balancing system includes a plurality of eccentric rings and a plurality of reference columns, each of the reference columns is evenly installed in the casing along the inner side of the casing, and each of the eccentric rings is sleeved and installed outside the rotor device, the diameter of the cylindrical surface where the vertex of each reference column is located is defined as the first diameter, and the outer diameter of the eccentric ring is defined as the second diameter, the difference between the first diameter and the second diameter is equal to twice the gap between the copper sleeve and the motor end cover, and the distance between the center of the eccentric ring and the axis of rotation of the rotor device is smaller than the gap between the copper sleeve and the motor end cover.

2. A centrifugal compressor with a volute heat dissipation structure according to claim 1, characterized in that: The first compression system includes a No. 1 volute end cover, a first volute, a first collector and a first impeller. The No. 1 volute end cover is installed on the motor end cover, the first volute is installed on the No. 1 volute end cover, the first collector is installed on the side of the No. 1 volute end cover away from the motor end cover, the first collector is connected to the first volute, the first impeller is installed on the rotor device, the first impeller is located in the first collector, and the No. 1 volute end cover and the rotor device are sealed by a stepped sealing sleeve.

3. A centrifugal compressor with a volute heat dissipation structure according to claim 1, characterized in that: The second compression system includes a No. 2 volute end cover, a second volute, a second collector and a second impeller. The No. 2 volute end cover is installed on the motor end cover, the second volute is installed on the No. 2 volute end cover, the second collector is installed on the side of the No. 2 volute end cover away from the motor end cover, the second volute is connected to the second collector, the second impeller is installed on the rotor device, the second impeller is located in the second collector, and the No. 2 volute end cover and the rotor device are sealed by a stepped sealing sleeve.

4. A centrifugal compressor with a volute heat dissipation structure according to claim 1, characterized in that: The rotor device comprises two output shafts and an intermediate sleeve. The two output shafts are mounted on both sides of the intermediate sleeve, and each eccentric ring sleeve is arranged outside the intermediate sleeve.

5. The centrifugal compressor with a volute heat dissipation structure according to claim 1, characterized in that: The end of the oil supply channel of the motor end cover is provided with a flared pipe joint and an extended joint in sequence.

6. A centrifugal compressor with a volute heat dissipation structure according to claim 1, characterized in that: The gap between the copper sleeve and the motor end cover is 0.2 mm to 0.4 mm.

7. A centrifugal compressor with a volute heat dissipation structure according to claim 1, characterized in that: A plurality of pressure maintaining grooves are provided on one side of the copper sleeve close to the motor end cover.

8. The centrifugal compressor with a volute heat dissipation structure according to claim 1, characterized in that: The mutually adjacent positions of the eccentric ring and the plurality of reference columns are all arc-shaped.

Images