CN117588383A - Magnetic suspension piston compressor with electromagnetic bearing - Google Patents
Magnetic suspension piston compressor with electromagnetic bearing Download PDFInfo
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- CN117588383A CN117588383A CN202311594754.XA CN202311594754A CN117588383A CN 117588383 A CN117588383 A CN 117588383A CN 202311594754 A CN202311594754 A CN 202311594754A CN 117588383 A CN117588383 A CN 117588383A
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- rod
- piston rod
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 28
- 239000000725 suspension Substances 0.000 title claims abstract description 18
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 61
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims description 43
- 239000000696 magnetic material Substances 0.000 claims description 17
- 238000005339 levitation Methods 0.000 claims description 10
- 229910000828 alnico Inorganic materials 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 230000008093 supporting effect Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000035929 gnawing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
- F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a magnetic suspension piston compressor with an electromagnetic bearing, wherein a connecting rod is movably arranged on a crankshaft, a guide sliding block is hinged at the extending end of the connecting rod, the guide sliding block is slidingly supported on a crank case, and a piston rod is connected to the guide sliding block; the piston rod is fixedly provided with a piston body, the piston body is movably arranged in the cylinder sleeve, the inner wall surface of the piston body is fixedly embedded with a piston permanent magnet pipe, and the inner wall surface of the piston permanent magnet pipe is fixedly embedded with a piston ferromagnetic pipe; at least two ferromagnetic plates are fixedly arranged on the cylinder sleeve, a cylinder body iron core is arranged between the two adjacent ferromagnetic plates, and a cylinder body coil is wound on the cylinder body iron core; the electromagnetic bearing assembly comprises bearing ferromagnetic plates movably sleeved on the piston rod, a bearing iron core is arranged between two adjacent bearing ferromagnetic plates, and a bearing coil is wound on the bearing iron core. The piston compressor can generate radial electromagnetic force for supporting the piston body and the piston rod, thereby effectively reducing friction resistance and power consumption.
Description
Technical Field
The invention relates to a reciprocating piston type gas compressor, in particular to a piston type compressor with an electromagnetic bearing, a magnetic suspension piston and a cylinder sleeve.
Background
The piston compressor compresses and discharges gas by converting a rotational motion of a driving machine into a reciprocating motion of a piston through a crank link mechanism driven by a prime mover. The piston type compressor has the characteristics of simple structure, easy control and wide pressure range, but because the piston ring on the piston body is in direct sliding contact with the inner cavity wall of the cylinder body, contact abrasion between the piston body and the inner cavity wall of the cylinder body cannot be avoided, and the contact abrasion is unevenly abraded in the piston body and the cylinder cavity, so that the piston body and the cylinder wall are out of round, the leakage amount of compressed gas is increased continuously, the compression efficiency of the gas is influenced, and the pressure stability of the discharged gas is also influenced.
The piston rod of the piston compressor is supported on the cylinder seat in a sliding way through the sliding bearing bush, the frequent reciprocating motion of the piston rod on the sliding bearing bush inevitably generates abrasion or gnawing on the contact friction surface of the piston rod and the bearing bush, on one hand, the sliding supporting action on the piston rod and the piston is gradually lost, the reciprocating motion position of the piston rod and the piston deviating from the axis of the cylinder is caused, the motion precision of the piston in the cylinder cavity is seriously influenced, and the gas compression efficiency of the compressor is reduced; on the other hand, as the friction between the piston rod and the sliding bearing bush is increased, the friction coefficient and the abrasion of the sliding bearing with contact are increased, the driving power consumption is increased, and the heat of the piston rod and the bearing bush is caused.
Therefore, the contact friction and abrasion exists between the piston and the cylinder body as well as between the piston rod and the sliding bearing bush of the existing piston type compressor, the structure has the advantages of uneven friction and abrasion, high transmission power consumption, easy heating and damage, increased vibration noise generation, reduced stable operation and service life of the piston cylinder body, and unsuitability for the development of the piston type compressor in the directions of high power, high air quantity, high pressure, low noise, high efficiency and high reliability.
Disclosure of Invention
The invention aims to solve the technical problem of providing the magnetic suspension piston compressor with the electromagnetic bearing, which can generate radial electromagnetic force for supporting the piston body and the piston rod and reduce contact friction resistance and power consumption.
In order to solve the technical problems, the magnetic suspension piston compressor with the electromagnetic bearing comprises a crankshaft and a crank case for rotatably supporting the crankshaft, wherein a connecting rod is movably arranged on the crankshaft, the extending end of the connecting rod is hinged with a guide sliding block, the guide sliding block is slidably supported on the crank case, and a piston rod is connected to the guide sliding block; the piston rod is fixedly provided with a piston body, the piston body is movably arranged in the cylinder sleeve, the inner wall surface of the piston body is fixedly embedded with a piston permanent magnet pipe, and the inner wall surface of the piston permanent magnet pipe is fixedly embedded with a piston ferromagnetic pipe; at least two ferromagnetic plates are fixedly arranged on the cylinder sleeve, a cylinder body iron core is arranged between two adjacent ferromagnetic plates, and a cylinder body coil is wound on the cylinder body iron core; the electromagnetic bearing assembly comprises bearing ferromagnetic plates movably sleeved on the piston rod, a bearing iron core is arranged between two adjacent bearing ferromagnetic plates, and a bearing coil is wound on the bearing iron core.
Further, a cylinder cover is fixedly arranged at one end of the cylinder sleeve, a cylinder cover sealing assembly is arranged on the cylinder cover, a piston rod sealing seat is fixedly arranged at the other end of the cylinder sleeve, a piston rod sealing assembly is arranged on the piston rod sealing seat, and a piston rod extends to two ends respectively and penetrates through the cylinder cover sealing assembly and the piston rod sealing assembly.
Preferably, the piston rod is provided with two electromagnetic bearing assemblies, and the electromagnetic bearing assemblies are respectively arranged on the outer sides of the cylinder cover sealing assembly and the piston rod sealing assembly.
Preferably, the cylinder cover sealing assembly and the piston rod sealing assembly are filler sealing or mechanical sealing; the cylinder sleeve is fixedly arranged on a cylinder body seat, and an air inlet cavity and an air outlet cavity are arranged on the cylinder body seat; the cylinder body seat is fixedly connected with the crankcase.
Preferably, the piston body is fixedly arranged on the piston rod through a piston radial plate, and the outer column surface of the piston body adopts a labyrinth sealing structure or a piston ring sealing structure.
Further, a rod body ferromagnetic tube is sleeved on the rod body of the piston rod corresponding to the electromagnetic bearing assembly, and a rod body permanent magnet tube is sleeved on the rod body ferromagnetic tube; the length L3 of the rod body ferromagnetic tube and the rod body permanent magnetic tube is larger than the width L4 of the electromagnetic bearing assembly.
Preferably, 2-10 ferromagnetic plates are arranged on the cylinder sleeve, and the distance L1 between the ferromagnetic plates at the two ends of the cylinder sleeve is larger than the width L2 of the piston body.
Preferably, the rod surface of the piston rod is coated with a wear-resistant layer, and the wear-resistant layer is formed by coating a wear-resistant ceramic material.
Preferably, the piston body and the cylinder liner are made of a non-ferromagnetic material, which is aluminum, an aluminum alloy, austenitic stainless steel or plastic; the bearing ferromagnetic plate and the ferromagnetic plate are made of soft magnetic materials, wherein the soft magnetic materials are ferrite materials, alnico magnetic materials or iron-nickel alloy materials, and the bearing iron core and the silicon steel sheet of the cylinder body iron core are formed by superposition.
Preferably, a guide cylinder is fixedly arranged on the crankcase, and the guide sliding block is slidably arranged in the guide cylinder; the piston rod is fixedly connected with the guide sliding block through the locking nut component.
In the structure, the piston permanent magnet pipe, the piston ferromagnetic pipe, the cylinder body iron core and the cylinder body coil are fixedly embedded in the inner wall of the piston body, and the cylinder body iron core and the cylinder body coil are arranged between the cylinder sleeve ferromagnetic plates, so that on one hand, the piston permanent magnet pipe is excited to generate constant and durable static magnetic flux, and the piston generates durable suspension acting force in the cylinder body, on the other hand, the cylinder body coil generates magnetic flux induction under the action of current, and the induction magnetic flux enters the ferromagnetic plate at one side of the cylinder body coil to the ferromagnetic plate at the other side of the cylinder body coil through the corresponding cylinder body iron core, and the electric induction magnetic flux generates suspension acting force on the piston; the piston body is supported by suspension force formed by the combined action of constant and durable static magnetic flux and electromagnetic induction magnetic flux, so that the piston body is maintained to form a radial suspension position in the cylinder body, the piston body is in a non-contact suspension state in the cylinder body cavity, stable suspension centering is formed, contact friction and abrasion between the piston body and the cylinder body cavity wall are avoided, the reciprocating resistance of the piston body is reduced, and the driving power consumption and operation faults are reduced.
The two ends of the piston rod are supported on the electromagnetic bearing assembly, and the bearing stator winding formed by the bearing ferromagnetic plate, the bearing iron core and the bearing coil generates a magnetic field capable of providing radial supporting force, so that the piston rod is suspended in the electromagnetic bearing stator, and the non-contact state between the piston rod and the bearing stator is maintained by controlling the current magnitude and direction of the bearing coil.
Because the piston body and the cylinder sleeve body and the piston rod and the bearing stator are kept in a non-contact suspension state, contact friction and abrasion between two opposite moving parts are thoroughly avoided, the service life of parts is prolonged, friction resistance and driving power consumption are reduced, the piston body operates more stably, and the compression efficiency of the compressor is effectively improved. The suspension structure is beneficial to the reciprocating speed change and the quick response of the piston body while greatly reducing the dynamic driving resistance of the piston body, is beneficial to the quick conversion of the air suction and the air discharge of the piston body in the cylinder cavity, and has the advantages of small reciprocating push-pull action resistance, low driving power requirement and low vibration noise.
Drawings
The magnetic suspension piston compressor with electromagnetic bearing according to the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.
FIG. 1 is a schematic cross-sectional view of one embodiment of a magnetic levitation piston compressor having an electromagnetic bearing of the present invention;
FIG. 2 is a view showing a suspension bearing construction of the piston body and cylinder liner of the embodiment of FIG. 1;
FIG. 3 is a block diagram of the piston rod of FIG. 2;
FIG. 4 is an enlarged view of a portion of section I of FIG. 3;
FIG. 5 is an enlarged view of a portion II of FIG. 3;
fig. 6 is a schematic cross-sectional view of the piston body of fig. 2;
FIG. 7 is an assembled block diagram of the ferromagnetic plates, cylinder cores and cylinder coils on the cylinder liner of FIG. 1;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is an assembled block diagram of the ferromagnetic plate and cylinder core of FIG. 7;
FIG. 10 is a top view of FIG. 9;
FIG. 11 is an assembled block diagram of the bearing ferromagnetic plate, bearing core, and bearing coil of FIG. 2;
FIG. 12 is an assembled block diagram of the bearing iron magnet and bearing core of FIG. 11;
fig. 13 is a top view of fig. 12.
In the figure, a crank shaft bottom box, a crank shaft, a 3-connecting rod, a 4-crank shaft, a 5-guide cylinder, a 6-guide sliding block, a 7-locking nut component, an 8-piston rod, a 9-piston rod sealing component, a 10-piston rod sealing seat, a 11-cylinder body seat, a 12-cylinder cover sealing component, a 13-cylinder cover, a 14-top cover and a 15-bearing gland, 16-bearing ferromagnetic plate, 17-bearing coil, 18-bearing iron core, 19-bearing support, 20-cylinder sleeve, 21-piston radial plate, 22-piston body, 23-piston ferromagnetic tube, 24-piston permanent magnet tube, 25-cylinder coil, 26-cylinder iron core, 27-ferromagnetic plate, 28-rod ferromagnetic tube, 29-rod permanent magnet tube, 30-wear-resistant coating.
Detailed Description
The magnetic suspension piston compressor with electromagnetic bearing as shown in figure 1 comprises a crank case 4 and a crank bottom case 1 which are mutually fixedly arranged, wherein a crank shaft 2 is rotatably supported on the joint surface position of the crank bottom case 1 and the crank case 4 through a rotary bearing, a connecting rod 3 is rotatably arranged on each journal of the crank shaft 2, and a plurality of connecting rods 2 and piston rods 8 connected with the connecting rods 3 can be arranged on the crank shaft 2 in parallel, so that a vertical gas compression unit with a plurality of groups of pistons and cylinder liners is formed. Only one gas compression unit is shown in fig. 1.
The upwardly projecting end of the connecting rod 3 is hinged with a guide slide 6, which guide slide 6 is slidably supported in the guide cylinder 5 by means of a wear-resistant sliding structure on its surface. In this embodiment, the guide cylinder 5 and the crankcase 4 are cast as a unitary structure, and the guide cylinder 5 is located in the cavity of the crankcase 4. The guide cylinder 5 is provided with a circular tube sliding cavity, and the guide sliding block 6 is slidably supported in the sliding cavity of the guide tube 5 so that the guide sliding block 6 slides back and forth along the axial direction. The upper end of the guide slide block 6 is fixedly connected with the lower end of the piston rod 8 through a locking nut assembly 7, and the locking nut assembly 7 adopts a common nut screwing locking structure. The piston rod 8 extends upwardly along the chamber of the crankcase 4, and the piston rod 8 passes axially from below upwards in sequence through the lower electromagnetic bearing assembly, the piston rod seal assembly 9, the piston body 22, the cylinder head seal assembly 12 and the upper electromagnetic bearing assembly. The electromagnetic bearing assemblies at the upper and lower ends of the piston body 22 are of the same structure, and each electromagnetic bearing assembly comprises a bearing ferromagnetic plate 16, a bearing coil 17 and a bearing iron core 18.
The electromagnetic bearing assembly positioned below is fixedly arranged in the top end lower cavity of the crankcase 4 through a corresponding bearing support 19 and a bearing gland 15, a piston rod sealing seat 10 is fixedly arranged above the top end of the crankcase 4, and a piston rod sealing assembly 9 is fixedly arranged on the piston rod sealing seat 10. A cylinder block 11 is fixedly installed on the piston rod sealing seat 10, and an intake chamber and an exhaust chamber for intake and exhaust are provided on the cylinder block 11.
The cylinder body seat 11 is fixedly provided with a vertical cylinder sleeve 20, and the piston body 22 is movably arranged in a cylinder cavity of the cylinder sleeve 20. A ferromagnetic plate 27 is fixedly arranged on the outer side of the cylinder sleeve 20, a cylinder body iron core is arranged between the adjacent ferromagnetic plates 27, and cylinder body coils 25 are wound on the cylinder body iron cores 26.
A cylinder cover 13 is fixedly arranged at the upper end part of the cylinder body seat 11 which is vertically arranged, and a cylinder cover sealing assembly 12 is arranged in the cylinder cover 13. An electromagnetic bearing assembly at the upper end is fixed at the upper end of the cylinder head 13 by a corresponding bearing support 19 and bearing cover 15. The electromagnetic bearing assembly at the upper end and the overhanging rod end position are covered with a top cover 14, and the top cover 14 is fixedly mounted on the cylinder cover 13.
The outside of the cylinder head seal assembly 12 and the piston rod seal assembly 9 is provided with electromagnetic bearing assemblies on the respective sides. The cylinder cover sealing assembly 12 and the piston rod sealing assembly 9 adopt general packing sealing, and can be a sliding sealing structure such as mechanical sealing.
As shown in fig. 2, a piston body 22 is fixedly mounted at the middle section of the piston rod 8 through a piston web 21 and a web core sleeve fixed with the piston web, and the outer column surface of the piston body 22 adopts a labyrinth sealing structure, and of course, a piston ring sealing structure can also be adopted. Six ferromagnetic plates 27 are fixedly sleeved on the outer peripheral side of the cylinder sleeve 20 movably sleeved on the piston body 22 at intervals. Of course, the ferromagnetic plates 27 arranged parallel to each other may be preferably 2 to 10, and the number of the plates should be determined according to parameters such as piston stroke and compression efficiency of compressed gas.
The distance L1 between the ferromagnetic plates 27 at the outer ends should be greater than the width L2 of the piston body 22, i.e., the distance L1 should be at least equal to the width L2 of the piston body 22 and the reciprocating stroke of the piston body. Corresponding electromagnetic bearing assemblies are also provided on the piston rod 8 at both ends of the piston body 22.
As shown in fig. 3, 4 and 5, the rod body position of the piston rod 8 corresponding to the electromagnetic bearing assembly is fixedly sleeved with a rod body ferromagnetic tube 28 and a rod body permanent magnet tube 29 in sequence from inside to outside, the length L3 of the rod body ferromagnetic tube 28 and the length L3 of the rod body permanent magnet tube 29 are larger than the width L4 of the electromagnetic bearing assembly, the rod body permanent magnet tube 29 is a permanent magnet tube, the rod body ferromagnetic tube 28 is made of a soft magnetic material, and the soft magnetic material is ferrite material, alnico magnetic material or iron-nickel alloy material. A wear-resistant layer 30 of wear-resistant ceramic material is coated on the rod body of the piston rod 8, and the wear-resistant layer 30 also extends to cover the rod body permanent magnet tube 29 to improve the wear resistance and surface integrity of the piston rod.
As shown in fig. 6, a piston permanent magnet tube 24 is fixedly embedded in the inner wall surface of the piston body 22, a piston ferromagnetic tube 23 is fixedly embedded in the inner wall surface of the piston tube 24, and the outer column surface of the piston body 22 adopts a labyrinth seal structure. The piston permanent magnet tube 24 is made of a permanent magnet, and the piston ferromagnetic tube 23 is a circular tube made of a soft magnetic material, wherein the soft magnetic material is ferrite material, alnico magnetic material or iron-nickel alloy material.
As shown in fig. 7, 8, 9 and 10, six ferromagnetic plates 27 are arranged in parallel at intervals, a central hole for sleeving the cylinder sleeve 20 is formed in the middle of each ferromagnetic plate 27, four fins extending vertically are arranged on the outer side of each ferromagnetic plate 27, a cylinder iron core 26 is fixedly arranged between each corresponding fin of two adjacent ferromagnetic plates 27, a cylinder coil 25 is wound on each cylinder iron core 26, and the cylinder coil 25 exceeds the outer end of each ferromagnetic plate 27. The cylinder core 26 is formed by stacking silicon steel sheets, and the ferromagnetic plate 27 is made of a soft magnetic material which is a ferrite material, an alnico magnetic material, or an alnico material.
As shown in fig. 11, 12 and 13, a central hole capable of movably penetrating through the piston rod 8 is arranged in the middle of two bearing ferromagnetic plates 16 arranged in parallel at intervals, four fins extending vertically are arranged on the outer side of each bearing ferromagnetic plate 16, a bearing iron core 18 is fixedly arranged between the corresponding fins of each bearing ferromagnetic plate 16, a bearing coil 17 is wound on each bearing iron core 18, each bearing iron core 18 is formed by stacking silicon steel sheets, each bearing ferromagnetic plate 16 is made of a soft magnetic material, and the soft magnetic material is ferrite material, alnico magnetic material or iron-nickel alloy material.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (10)
1. Magnetic suspension piston compressor with electromagnetic bearing, including bent axle (2), and crankcase (4) of rotation support bent axle (2), the activity is provided with connecting rod (3) on bent axle (2), its characterized in that: the extending end of the connecting rod (3) is hinged with a guide sliding block (6), the guide sliding block (6) is slidably supported on the crank case (4), and a piston rod (8) is connected to the guide sliding block (6); a piston body (22) is fixedly arranged on the piston rod (8), the piston body (22) is movably arranged in the cylinder sleeve (20), a piston permanent magnet pipe (24) is fixedly embedded on the inner wall surface of the piston body (22), and a piston ferromagnetic pipe (23) is fixedly embedded on the inner wall surface of the piston permanent magnet pipe (24); at least two ferromagnetic plates (27) are fixedly arranged on the cylinder sleeve (10), a cylinder body iron core (26) is arranged between two adjacent ferromagnetic plates (27), and a cylinder body coil (25) is wound on the cylinder body iron core (26); the electromagnetic bearing assembly is further arranged on the piston rod (8) and comprises bearing ferromagnetic plates (16) movably sleeved on the piston rod (8), a bearing iron core (18) is arranged between two adjacent bearing ferromagnetic plates (16), and a bearing coil (17) is wound on the bearing iron core (18).
2. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: one end of the cylinder sleeve (20) is fixedly provided with a cylinder cover (13), the cylinder cover (13) is provided with a cylinder cover sealing assembly (12), the other end of the cylinder sleeve (10) is fixedly provided with a piston rod sealing seat (10), the piston rod sealing seat (10) is provided with a piston rod sealing assembly (9), and the piston rod (8) extends towards two ends respectively and penetrates through the cylinder cover sealing assembly (12) and the piston rod sealing assembly (9).
3. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: two electromagnetic bearing assemblies are arranged on the piston rod (8), and the electromagnetic bearing assemblies are respectively arranged on the outer sides of the cylinder cover sealing assembly (12) and the piston rod sealing assembly (9).
4. A magnetic levitation piston compressor having an electromagnetic bearing as defined in claim 1, 2 or 3, wherein: the cylinder cover sealing assembly (12) and the piston rod sealing assembly (9) are in filler sealing or mechanical sealing; the cylinder sleeve (20) is fixedly arranged on the cylinder body seat (11), and the cylinder body seat (11) is provided with an air inlet cavity and an air outlet cavity; the cylinder body seat (11) is fixedly connected with the crankcase (4).
5. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: the piston body (22) is fixedly arranged on the piston rod (8) through a piston radial plate (21), and the outer column surface of the piston body (22) adopts a labyrinth sealing structure or a piston ring sealing structure.
6. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: a rod body ferromagnetic tube (28) is sleeved on a rod body of a piston rod (8) corresponding to the electromagnetic bearing assembly, and a rod body permanent magnet tube (29) is sleeved on the rod body ferromagnetic tube (28); the length L3 of the rod ferromagnetic tube (28) and the rod permanent magnetic tube (29) is larger than the width L4 of the electromagnetic bearing assembly.
7. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: 2-10 ferromagnetic plates (27) are arranged on the cylinder sleeve (20), and the distance L1 between the ferromagnetic plates (27) positioned at two ends of the cylinder sleeve (20) is larger than the width L2 of the piston body (22).
8. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: the rod surface of the piston rod (8) is coated with a wear-resistant coating (30), and the wear-resistant coating (30) is formed by coating a wear-resistant ceramic material.
9. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: the piston body (22) and the cylinder sleeve (20) are made of non-ferromagnetic materials, wherein the non-ferromagnetic materials are aluminum, aluminum alloy, austenitic stainless steel or plastics; the bearing ferromagnetic plate (16) and the ferromagnetic plate (27) are made of soft magnetic materials, wherein the soft magnetic materials are ferrite materials, alnico magnetic materials or iron-nickel alloy materials, and the bearing iron core (18) and the silicon steel sheets of the cylinder iron core (26) are stacked.
10. The magnetic levitation piston compressor with electromagnetic bearing of claim 1, wherein: a guide cylinder (5) is fixedly arranged on the crankcase (4), and the guide sliding block (6) is slidably arranged in the guide cylinder (5); the piston rod (8) is fixedly connected with the guide sliding block (6) through the locking nut component (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311594754.XA CN117588383A (en) | 2023-11-27 | 2023-11-27 | Magnetic suspension piston compressor with electromagnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311594754.XA CN117588383A (en) | 2023-11-27 | 2023-11-27 | Magnetic suspension piston compressor with electromagnetic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117588383A true CN117588383A (en) | 2024-02-23 |
Family
ID=89917942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311594754.XA Pending CN117588383A (en) | 2023-11-27 | 2023-11-27 | Magnetic suspension piston compressor with electromagnetic bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117588383A (en) |
-
2023
- 2023-11-27 CN CN202311594754.XA patent/CN117588383A/en active Pending
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