CN215949762U - A kind of compressor - Google Patents
A kind of compressor Download PDFInfo
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- CN215949762U CN215949762U CN202121280489.4U CN202121280489U CN215949762U CN 215949762 U CN215949762 U CN 215949762U CN 202121280489 U CN202121280489 U CN 202121280489U CN 215949762 U CN215949762 U CN 215949762U
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- compressor
- crankshaft
- bent axle
- organism
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Abstract
The utility model discloses a compressor, which comprises a machine body and a crankshaft, wherein the crankshaft is arranged in a hole on the machine body. The utility model provides a compressor, wherein a magnetic bearing can avoid direct friction between a machine body and a crankshaft, reduce friction force and reduce abrasion.
Description
Technical Field
The utility model relates to the technical field of refrigeration equipment, in particular to a compressor.
Background
Bent axle needs the fast rotation to drive connecting rod and piston motion in the compressor, need set up the bearing between bent axle and the organism, however, wearing and tearing all can appear in current bearing use for a long time, and the clearance grow leads to the rotatory vibration grow of bent axle, and the noise increases. There are also compressors in the prior art that use magnetic bearings, but when used for axial support, there are some magnetic forces that result in radial attraction forces and increased radial friction. Fig. 4 shows a totally-enclosed refrigeration compressor in the prior art, in which a crankshaft needs to rotate rapidly to drive a connecting rod and a piston to move, and the crankshaft is in direct contact with a machine body, so that friction is large.
The Chinese patent application publication No. CN108644228A, published as 2018, 03, 15 and named as 'a small-volume low-power-consumption axial magnetic suspension bearing', discloses a small-volume low-power-consumption axial magnetic suspension bearing. According to the utility model, the coil is arranged on the outer side of the rotor thrust disc, so that the axial length of the bearing is shortened, and the critical rotating speed of the rotor is improved; the utility model is an active and passive mixed mode, the permanent magnet provides main bearing force, and the coil restrains disturbance force, so the utility model has the advantages of small current and low loss. Compared with the existing passive axial magnetic suspension bearing, the active vibration suppression coil is added, so that the passive axial magnetic suspension bearing has the advantages of small vibration and high reliability. The suspension bearing still has the above-mentioned problems.
Disclosure of Invention
The utility model provides a compressor with small friction force between a crankshaft and a machine body, aiming at overcoming the defect of large friction force between the crankshaft and the machine body in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a compressor, includes organism and bent axle, and the bent axle is installed in the hole on the organism, and characterized by is equipped with first magnet on the axial bearing surface of bent axle, and the organism is equipped with the second magnet near the bearing surface of first magnet, and the magnetic pole of the face that first magnet and second magnet are relative is the same.
Among the above-mentioned technical scheme, the magnetic pole of the face that first magnet and second magnet are relative is the same can produce the repulsion force, makes organism and bent axle keep certain clearance in the axial, avoids the direct friction between organism and the bent axle, reduces frictional force, reduces wearing and tearing. The magnetic isolation sleeve can play a magnetic isolation role, eliminate radial attraction between the crankshaft and the engine body and reduce friction between the engine body and the crankshaft.
Preferably, the side wall of the hole is provided with a magnetic isolation sleeve which is fixed on the machine body. The magnetic isolation sleeve can play a magnetic isolation role, eliminate radial attraction between the crankshaft and the engine body and reduce friction between the engine body and the crankshaft.
Preferably, the magnetism isolating sleeve is a sleeve, and the sleeve is made of a magnetic conductive material. The structure can ensure the magnetic isolation effect of the magnetic isolation sleeve.
Preferably, an elastic layer is provided on a surface of the first magnet or the second magnet. The elastic layer can play a buffering role, and when the first magnet is close to the second magnet, the first magnet and the second magnet are prevented from directly colliding.
Preferably, the elastic layer is a fully sealed structure. The protective sleeve material is impact-resistant material, and magnet is wrapped up completely to the protective sheath, and full seal structure can guarantee that the magnet granule can not get into lubricating oil when the magnet is broken.
Preferably, a first positioning groove is formed in the crankshaft, the first magnet is arranged in the first positioning groove, a second positioning groove is formed in the machine body, and the second magnet is arranged in the second positioning groove. The structure may serve as a positioning function.
Preferably, the bottom surface and the side wall of the first positioning groove are provided with heat insulation coatings. The structure can play thermal-insulated effect, avoids first magnet to receive external heat transfer influence, leads to the high temperature, the demagnetization problem that arouses.
Preferably, the bottom surface and the side wall of the second positioning groove are provided with heat insulation coatings. The structure can play thermal-insulated effect, avoids first magnet to receive external heat transfer influence, leads to the high temperature, the demagnetization problem that arouses.
Preferably, the compressor comprises a housing, and a magnet is arranged at the bottom of the housing. Magnet iron fillings in can the adsorption lubricating oil reduce the iron fillings that get into the clearance between bent axle and the axle sleeve.
Preferably, the machine body or the crankshaft is provided with a limiting bulge for limiting the axial relative position of the machine body and the crankshaft. The limiting protrusion can limit axial displacement of the crankshaft, and the first magnet is guaranteed not to be in contact with the second magnet. When the collision is severe, the protrusions are contacted firstly to limit and protect the magnets.
Preferably, the machine body or the crankshaft is provided with a limit bulge. The limiting protrusion can limit axial displacement of the crankshaft, and the first magnet is guaranteed not to be in contact with the second magnet. When the collision is severe, the protrusions are contacted firstly to limit and protect the magnets.
The utility model has the beneficial effects that: (1) the magnetic bearing can avoid direct friction between the machine body and the crankshaft, reduce friction force and reduce abrasion; (2) the magnetic isolation sleeve can play a magnetic isolation role, eliminate the radial attraction between the crankshaft and the engine body and reduce the friction between the engine body and the crankshaft; (3) the elastic layer can play the cushioning effect, when avoiding first magnet to be close to second magnet, both direct collision, and the full seal structure of elastic layer can guarantee that the magnet granule can not get into lubricating oil when magnet is broken.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a top view of the present invention;
fig. 4 is a schematic structural diagram of a hermetically sealed refrigeration compressor in the prior art.
In the figure: compressor body 1, organism 1.1, second constant head tank 1.1.1, bent axle 1.2, spacing arch 1.3, first constant head tank 1.2.1, first magnet 2, second magnet 3, magnetic isolation cover 4, elastic layer 5.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments.
Example 1:
as shown in fig. 1, fig. 2 and fig. 3, a compressor, including organism 1.1 and bent axle 1.2, bent axle 1.2 is installed in the hole on organism 1.1, bent axle 1.2 is epaxial to be equipped with first constant head tank 1.2.1, be equipped with adiabatic coating on the bottom surface and the lateral wall of first constant head tank 1.2.1, first constant head tank 1.2.1 internal fixation has first magnet 2, be equipped with second constant head tank 1.1.1 on the organism 1.1, be equipped with adiabatic coating on the bottom surface and the lateral wall of second constant head tank 1.1.1, second constant head tank 1.1.1 internal fixation has second magnet 3, the magnetic pole of the face that first magnet 2 is relative with second magnet 3 is the same, the surface that first magnet 2 is close to second magnet 3 is equipped with elastic layer 5. The surface of the second magnet 3 close to the first magnet 2 is provided with an elastic layer 5. The elastic layer 5 is a full-sealing structure, the protective sleeve completely wraps the magnet, the protective sleeve is made of impact-resistant materials, the magnetic isolation sleeve 4 is arranged on the side wall of the through hole, the magnetic isolation sleeve 4 is fixed with the machine body 1.1, the magnetic isolation sleeve 4 is a sleeve, and the sleeve is made of magnetic conductive materials.
The bottom of the machine body 1.1 is provided with a magnet. The magnet is bonded to the plastic sheet or the iron sheet with an adhesive, and the magnet does not fall off even if the magnet is broken. The magnet is arranged in the box to prevent the magnet from being broken, and the machine body 1.1 is provided with a hole to facilitate the magnet to be taken out. The bottom of the shell is provided with a counter bore, and scrap iron generated by abrasion is sunk into the counter bore.
In the above technical scheme, the same magnetic poles of the opposite surfaces of the first magnet 2 and the second magnet 3 can generate repulsive force, so that a certain gap is kept between the machine body 1.1 and the crankshaft 1.2 in the axial direction, direct friction between the machine body 1.1 and the crankshaft 1.2 is avoided, friction force is reduced, and abrasion is reduced. The magnetic isolation sleeve 4 can play a magnetic isolation role, eliminate radial attraction between the crankshaft 1.2 and the machine body 1.1, and reduce friction between the machine body 1.1 and the crankshaft 1.2.
Example 2:
on embodiment 1's basis, establish on organism 1.1 or bent axle 1.2 with spacing protruding 1.3, be equipped with on organism 1.1 or bent axle 1.2 and be used for measuring the sensor in clearance between bent axle 1.2 and the organism 1.1, the sensor is connected with the controller, and the controller is connected with high in the clouds server, and high in the clouds server is connected with mobile terminal. The gap between the crankshaft 1.2 and the machine body 1.1 is checked through the mobile terminal. The crankshaft 1.2 and the engine body 1.1 are in clearance fit with each other, and the crankshaft 1.2 and the engine body 1.1 are in clearance fit with each other. Still including being used for shooing the camera of bent axle 1.2 and organism 1.1 connecting portion, the camera is connected with the controller. Whether the camera can examine the side and pile up there is solid particle, has or not iron fillings on detecting magnet, whether has iron fillings on detecting bent axle 1.2, the organism 1.1, be equipped with on bent axle 1.2 or the organism 1.1 and add magnetic force sensor, magnetic force sensor is connected with the controller for examine the side magnet demagnetization condition. The compressor is provided with a pipeline, gas or liquid is introduced into the pipeline, when solid particles exist in the first magnet 2 or the second magnet 3 or the crankshaft 1.2 or the machine body 1.1, the switch is turned on, the gas or the liquid is discharged, and scrap iron is blown away. The machine body 1.1 is provided with a filter screen, so that scrap iron entering a gap between the crankshaft 1.2 and the shaft sleeve is reduced.
Example 3:
the embodiment is basically the same as the embodiment 1, except that a filter screen is arranged around an oil inlet hole at the lower end of the crankshaft, lubricating oil enters an oil hole of the crankshaft through the filter screen, and the filter screen is fixed at the lower end of the crankshaft and prevents solid particles from entering the oil hole of the crankshaft. The filter screen may be U-shaped with the ends of the U being secured to the sides of the lower end of the crankshaft.
The bottom of the shell is provided with a pit, and solid particles are deposited in the pit, so that the particles are prevented from entering a gap between the crankshaft and the crankshaft hole and a gap between the piston and the cylinder.
The bottom of casing is equipped with the third magnet, and iron fillings in the lubricating oil adsorb on the magnet, avoid the granule to get into the clearance in bent axle and bent axle hole, the clearance of piston and cylinder.
Be equipped with the filter screen around the second magnet on the organism, lubricating oil gets into the magnet region through the filter screen, and the filter screen is fixed on the organism, and the prevention solid particle gets into the magnet region, prevents that iron fillings from adsorbing on the second magnet.
Be equipped with the sector between the crank pin of bent axle and the main shaft, be equipped with the filter screen around the first magnet of bent axle, lubricating oil gets into the magnet region through the filter screen, and the filter screen is fixed on the sector of bent axle, and the prevention solid particle gets into the magnet region, prevents that iron fillings from adsorbing on the second magnet.
Example 4:
this embodiment is basically the same as embodiment 1, and the difference lies in that, the compressor includes the piston, the cylinder, the connecting rod, the bent axle, the cylinder head, the casing, the cylinder head is fixed on the cylinder, the connecting rod both ends are connected with crank pin and piston respectively, be equipped with the fourth magnet on the casing, the region relative with the fourth magnet on the cylinder head is equipped with the fifth magnet, fourth magnet and fifth magnet opposite face magnetism are the same, repulsion between fourth magnet and the fifth magnet produces the holding power to the cylinder head, avoid cylinder head and casing collision, reduce vibration and noise.
Example 5:
a compressor assembly method, comprising a compressor of embodiment 1, comprising the steps of:
a. heating a rotor: heating the rotor to 180-200 ℃;
b. assembling a rotor: thermally sleeving a rotor on a crankshaft;
c. cooling a rotor: putting the rotor, the crankshaft and the machine body in cooling liquid, and cooling the rotor to below 80 ℃;
d. assembling a machine body: after the rotor is cooled, assembling the machine body into the shell;
the cooling liquid is arranged in a container, the container is provided with an inlet and an outlet, and the inlet or the outlet is connected with a pump.
In the technical scheme, the heat is taken away by the cooling liquid, so that the temperature rise of the magnet can be reduced; the cooling is superior to natural cooling of air, and the magnet is prevented from generating cracks and generating demagnetization. Heat can be removed by flowing coolant.
The utility model has the beneficial effects that: (1) the magnetic bearing can avoid direct friction between the machine body 1.1 and the crankshaft 1.2, reduce friction force and reduce abrasion; (2) the magnetism isolating sleeve 4 can play a role in isolating magnetism, eliminate the radial attraction between the crankshaft 1.2 and the machine body 1.1, and reduce the friction between the machine body 1.1 and the crankshaft 1.2: (3) elastic layer 5 can play the cushioning effect, when avoiding first magnet 2 to be close to second magnet 3, both direct collision, and 5 full seal structure on elastic layer can guarantee that the magnet granule can not get into lubricating oil when magnet is broken.
Claims (10)
1. The utility model provides a compressor, includes organism and bent axle, and the bent axle is installed in the hole on the organism, and characterized by is equipped with first magnet on the axial bearing surface of bent axle, and the organism is equipped with the second magnet near the bearing surface of first magnet, and the magnetic pole of the face that first magnet and second magnet are relative is the same.
2. A compressor according to claim 1, wherein the side wall of the bore is provided with a magnetic shield which is fixed to the housing.
3. A compressor as claimed in claim 2, wherein said magnetic shield is a sleeve, said sleeve being made of a magnetically conductive material.
4. The compressor of claim 1, wherein the surface of the first magnet or the second magnet is provided with an elastic layer.
5. A compressor according to claim 3 or 4, wherein said resilient layer is of fully sealed construction.
6. A compressor as claimed in claim 1, 2, 3 or 4 wherein said crankshaft has a first detent, said first magnet is disposed in said first detent, said housing has a second detent, and said second magnet is disposed in said second detent.
7. The compressor of claim 6, wherein the bottom surface and the side wall of the first positioning groove are provided with a heat insulating coating.
8. The compressor of claim 6, wherein the bottom surface and the side wall of said second positioning groove are provided with a heat insulating coating.
9. A compressor as claimed in claim 1, 2, 3 or 4, wherein said compressor includes a housing, a bottom of said housing being provided with a magnet.
10. A compressor as claimed in claim 1, 2, 3 or 4 wherein the housing or crankshaft is provided with a stop projection for limiting the axial position of the housing relative to the crankshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121280489.4U CN215949762U (en) | 2021-06-08 | 2021-06-08 | A kind of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121280489.4U CN215949762U (en) | 2021-06-08 | 2021-06-08 | A kind of compressor |
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| Publication Number | Publication Date |
|---|---|
| CN215949762U true CN215949762U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121280489.4U Active CN215949762U (en) | 2021-06-08 | 2021-06-08 | A kind of compressor |
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| CN (1) | CN215949762U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446197A (en) * | 2021-06-08 | 2021-09-28 | 杭州钱江制冷压缩机集团有限公司 | Compressor and assembling method |
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2021
- 2021-06-08 CN CN202121280489.4U patent/CN215949762U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446197A (en) * | 2021-06-08 | 2021-09-28 | 杭州钱江制冷压缩机集团有限公司 | Compressor and assembling method |
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