CN213063962U - Magnetic fluid lubricating structure and compressor comprising same - Google Patents
Magnetic fluid lubricating structure and compressor comprising same Download PDFInfo
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- CN213063962U CN213063962U CN202020487151.5U CN202020487151U CN213063962U CN 213063962 U CN213063962 U CN 213063962U CN 202020487151 U CN202020487151 U CN 202020487151U CN 213063962 U CN213063962 U CN 213063962U
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Abstract
The utility model provides a magnetic current body lubricating structure reaches compressor including it, magnetic current body lubricating structure includes: the magnetic fluid is limited at the position of the groove under the magnetic force action of the permanent magnetic material, a bulge is formed on the assembly surface, a reflux groove is formed on the assembly surface, the reflux groove is positioned close to the groove, and the magnetic fluid can flow into the reflux groove under the action of external force, flows along the groove wall of the reflux groove and flows back to the position of the groove under the flow guiding action of the groove wall of the reflux groove. The utility model discloses a magnetic current body replaces lubricating oil, has avoided lubricating oil film to break easily and has made the assembly surface impaired to played the lubricated effect of fixed point, simultaneously, through setting up the backwash trough, make the magnetic current body can not extruded the assembly off-plate, improved the lubricated effect and the reliability of magnetic current body.
Description
Technical Field
The utility model relates to a lubricating structure technical field, concretely relates to magnetic fluid lubricating structure reaches compressor including it.
Background
The wear between the contact surfaces of the moving parts is a major cause of wear of the parts, especially on equipment requiring high speed operation. For example, wear of the end faces of pump components is a common failure mode of a rotary compressor, and especially, wear modes such as abrasive particles, adhesion, fatigue and the like often occur on the matching end faces of a roller and a bearing, a roller and a partition plate, a crankshaft thrust face and a bearing and the like, so that the performance, the service life and the reliability of the compressor are seriously affected.
In order to reduce the loss of the components, a lubricating medium is arranged between the contact components so as to form a protective film between the two components to prevent the two components from directly contacting and rubbing. For example, in the normal and stable operation process of the compressor, the roller end face is generally in a fluid lubrication state, but is disturbed by the change of the operation condition or external disturbance, the bearing capacity of the lubricating oil film is limited, the external impact cannot be effectively resisted, the oil film is easy to break, or when the lubricating oil is not sufficiently supplied, the matching end face is forced to rapidly enter a mixed lubrication or boundary lubrication state, the phenomena of increased friction coefficient, serious abrasion and the like occur. In addition, in order to provide sufficient lubricating oil for the friction end face, a compressor pump body needs to be provided with a complex oil way system, and the design and processing difficulty is increased.
As described above, the conventional lubrication method is not ideal in some special application scenarios, and cannot effectively reduce friction.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a magnetic fluid lubricating structure and including its compressor is used for solving the lubricating oil film that exists among the prior art at least and breaks easily, the not good technical problem of lubricated effect, specifically:
in a first aspect, the utility model provides a magnetic fluid lubricating structure sets up on the assembly surface between relative motion's part, include:
a groove formed on the assembly surface, a permanent magnetic material disposed in the groove,
the magnetic fluid is arranged on the assembly surface, is limited at the position of the groove under the action of the magnetic force of the permanent magnetic material, forms a bulge on the assembly surface, and is used as a lubricating structure between parts which move relatively,
the magnetic fluid can flow into the reflux groove under the action of external force, flows along the groove wall of the reflux groove and flows back to the position of the groove under the flow guiding action of the groove wall of the reflux groove.
Further optionally, the thickness of the permanent magnetic material is smaller than the depth of the groove, one part of the magnetic fluid is located in the groove, and the other part of the magnetic fluid overflows to the outside of the groove.
Further optionally, a wall surface of the backflow groove away from the groove is configured as a cambered surface.
Further optionally, the backflow groove is configured as a semicircular or semi-elliptical groove, and a wall surface of the backflow groove adjacent to the groove is configured as a plane.
Further optionally, the number of the backflow grooves is multiple, and the backflow grooves are distributed on two sides of the groove.
Further optionally, the trench includes a plurality of branch trenches independently disposed from each other, the permanent magnetic material is disposed in each branch trench, and a distance between two adjacent branch trenches is 100 μm to 250 μm.
Further optionally, the groove is configured as an annular groove, which is coaxial with a central axis of the mounting face.
In a second aspect, a compressor is provided, and the magnetic fluid lubricating structure is arranged on an assembly surface between mutually contacted moving parts in the compressor.
Further optionally, the magnetic fluid lubrication structure is disposed on the mating end surfaces of the roller and the bearing, the roller and the separator plate, and/or the crankshaft and the thrust surface in the compressor pump body.
Further optionally, a protective layer is disposed on the mounting surface, and the thickness of the protective layer is 0-100 μm.
Further optionally, the protective layer comprises:
a wear resistant coating comprising at least one of a phosphated layer, a cured layer, a nitrided layer, a carbonized layer, an N i-P layer, an alumina layer, DLC; and/or the presence of a gas in the gas,
a lubricious coating comprising silicone, graphite, PTFE, MoS2At least one of (1).
The utility model discloses a set up the magnetic current body and play the lubrication action on the assembly surface, avoided the lubricating film to break the assembly surface wearing and tearing that cause. Meanwhile, the backflow groove is arranged on the assembly surface, the magnetic fluid is guided to be prevented from flowing out of the assembly surface, the backflow groove plays a certain dynamic pressure effect, and the bearing capacity of the magnetic fluid can be further improved.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
Fig. 1 shows a schematic structural diagram of an assembly surface of a magnetic fluid lubrication structure provided by the present invention according to a first embodiment;
FIG. 2 shows a schematic cross-sectional view of a first embodiment magnetic fluid lubrication structure;
FIG. 3 is a schematic view showing a structure of an assembling face in the second embodiment;
FIG. 4 shows a schematic cross-sectional view of a magnetic fluid lubrication structure in a second embodiment;
FIG. 5 shows a schematic cross-sectional view of a magnetic fluid lubrication structure in a third embodiment.
In the figure:
10-a substrate; 11-assembly face; 21-a groove; 211-branch groove; 22-a reflux tank; 23-a permanent magnetic material; 24-a magnetic fluid; 30-protective layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two, but does not exclude the presence of at least one.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The utility model discloses a set up the lubricated mode that magnetic fluid lubricating structure replaced traditional lubricating oil on the assembly face between the part to improve assembly face fluid lubrication's stability, avoid the oil film to break and cause the abnormal wear of assembly face. And through setting up the backward flow groove, can avoid the part to receive external force such as centrifugal force, pressure and so on too big can be extruded outside the assembly surface under high-speed, high pressure operation to guarantee to have effectual lubrication under the running state. Besides, the magnetic fluid can replace lubricating oil to achieve the effect of fixed-point lubrication, and key lubrication can be conveniently performed on positions which are easy to wear.
In particular, the amount of the solvent to be used,
as shown in fig. 1 and 2, in a first embodiment, the present invention provides a magnetic fluid 24 lubrication structure, which is disposed on an assembly surface 11 between parts with relative motion, the parts with relative motion are used as a base 10, a surface of the base 10 contacting or cooperating with another part is used as the assembly surface 11, and the magnetic fluid 24 lubrication structure includes: a groove 21 formed on the mounting surface 11, a permanent magnetic material 23 being provided in the groove 21; and the magnetic fluid 24 is arranged on the assembly surface 11, the magnetic fluid 24 is limited at the position of the groove 21 under the action of the magnetic field generated by the permanent magnetic material 23, and a bulge is formed on the assembly surface 11 and serves as a lubricating structure between parts which move relatively. Preferably, the magnetic fluid 24 is a lubricating oil containing magnetic particles; the magnetic fluid 24 can flow into the reflux groove 22 and flow along the groove wall of the reflux groove 22 under the action of external force, and flow back to the position of the groove 21 under the action of the groove wall guide of the reflux groove 22.
After the two components moving relatively are assembled, the magnetic fluid 24 which forms a bulge on the assembling surface 11 lubricates the assembling surfaces 11 and plays a role in supporting, and the two contact surfaces are prevented from being in direct contact and being directly rubbed in the operation process. Preferably, the magnetic fluid 24 lubricating structure can be arranged on the assembling surface 11 of only one of the two parts, or the magnetic fluid 24 lubricating structure can also be arranged on the assembling surfaces 11 of the two parts at the same time, and when the magnetic fluid 24 lubricating structures are arranged on the assembling surfaces 11 of the two parts, the bulges formed by the magnetic fluid 24 of the magnetic fluid 24 lubricating structure on each part are in contact with the assembling surface 11 of the other part and play a role in lubrication.
Preferably, the permanent magnet material 23 is a magnet fixedly disposed in the groove 21, and is fixed in the groove 21 by bonding, clamping, or the like to prevent falling off. Alternatively, the permanent magnetic material 23 may be made of magnetic particle material, deposited in the groove 21, or the like.
Further, the thickness of the permanent magnetic material 23 is smaller than the depth of the groove 21, and the magnetic fluid 24 is attracted by the magnetic force of the permanent magnetic material 23 and is confined to a position close to the permanent magnetic material 23. Because the thickness of the permanent magnetic material 23 is smaller than the depth of the groove 21, one part of the magnetic fluid 24 flows into the groove 21, and the other part of the magnetic fluid 24 is ensured to overflow out of the groove 21, and a raised structure higher than the assembling surface 11 is formed at the groove 21 and is contacted with the assembling surface 11 of another part to play a role in lubrication and support.
Preferably, the grooves 21 are configured as circular grooves, elliptical grooves, rectangular grooves, arc-shaped grooves, annular grooves or other grooves with any shape, which can be set according to the shape of the mounting surface 11 and the characteristics of specific friction parts, and the number of the grooves 21 can be set to one, two or more according to the size of the mounting surface 11. For example, when the mounting surface 11 needs to rotate, the groove 21 is configured as an annular groove, and the groove 21 is coaxial with the rotation axis of the mounting surface 11, and the magnetic fluid 24 forms an annular protrusion on the mounting surface 11, which is concentric with the groove 21, that is, the annular protrusion formed by the magnetic fluid 24 is coaxial with the rotation axis of the mounting surface 11, so that the centrifugal force applied to each part of the magnetic fluid 24 during the rotation process is relatively uniform, and the magnetic fluid 24 is prevented from flowing out of the mounting surface 11 due to the local excessive force.
As shown in fig. 3 and 4, in the second embodiment, preferably, the trench 21 may further include a plurality of mutually independent branch trenches 211, each branch trench 211 is provided with a permanent magnetic material 23, and the permanent magnetic materials 23 in the plurality of branch trenches 211 provide magnetic force for the magnetic fluid 24 to adsorb at the same time. The plurality of branch grooves 211 are preferably the same size and uniformly distributed, for example, the distance between two adjacent branch grooves 211 may be 100 μm to 250 μm, when the trench 21 is a circular groove, the plurality of branch grooves 211 is configured as a plurality of concentric circular grooves having different radial sizes, and the difference in radius between two adjacent branch grooves 211 is 100 μm to 250 μm.
The arrangement of the plurality of branch grooves 211 can increase the magnetic attraction force to the magnetic fluid 24 on the one hand. On the other hand, the arrangement of the plurality of branch grooves 211 can increase the wettability of the magnetic fluid 24 on the assembly surface 11 and improve the lubricating effect of the magnetic fluid 24, and specifically, the arrangement of the plurality of branch grooves 211 changes the contact angle between the magnetic fluid 24 and the assembly surface 11, so that the spreadability of the assembly surface 11 on the magnetic fluid 24 is changed, the area of the protrusion formed by the magnetic fluid 24 is larger, namely, the lubricating area is increased, and the lubricating effect is improved.
Preferably, the groove 21 is formed by laser processing, mask electrolytic processing, embossing, micro ultrasonic processing, chemical etching, or the like.
The number of the backflow grooves 22 is multiple, the multiple backflow grooves 22 are distributed on two sides of the groove 21, and preferably, the multiple backflow grooves 22 are symmetrically distributed on two sides of the groove 21, so that the magnetic fluid 24 can flow to two sides of the groove 21 and can flow into the backflow grooves 22. Preferably, a plurality of independent reflow grooves 22 are provided on each side of the trench 21, and the reflow grooves 22 on each side of the trench 21 are uniformly distributed, or it is also possible to provide one reflow groove 22 having the same size along the length of the trench 21 on each side of the trench 21.
Preferably, the magnetic fluid 24 is arranged at a certain distance from the trench 21, so as to avoid the magnetic fluid 24 from flowing into the magnetic fluid 22 in a non-operating state, that is, it is required to ensure that a sufficient area needs to be reserved on the mounting surface 11 between the magnetic fluid 22 and the trench 21 to support the magnetic fluid 24 outside the trench 21, and at the same time, the distance between the magnetic fluid 22 and the trench 21 is not too large, so as to ensure that the magnetic fluid 24 in the magnetic fluid 22 can flow out from the magnetic fluid 22 under the inertia effect, and the magnetic fluid 24 flows back to the position of the trench 21 through the guidance of the trench wall of the magnetic fluid 22. Preferably, the distance between the return grooves 22 and the grooves 21 is 0.3mm to 1mm, and may be set to 0.5mm, for example.
Preferably, the wall surface of the groove wall of the return groove 22 far away from the groove 21 is configured to be a cambered surface, so that when the magnetic fluid 24 flows into the return groove 22, a certain buffer is formed after the magnetic fluid contacts the wall surface of the return groove 22 far away from the groove 21, and the impact force avoided by the magnetic fluid 24 and the return groove 22 is reduced. Meanwhile, the cambered surface also plays a role in guiding the magnetic fluid 24, and guides the magnetic fluid 24 flowing into the backflow groove 22 to flow to the groove 21.
Preferably, the reflow groove 22 is formed by a processing method such as laser processing, mask electrolytic processing, embossing processing, micro-ultrasonic processing, or chemical etching processing.
For example, in one particular embodiment, the recirculation channel 22 is configured as a plurality of individual channel-like structures, preferably semi-circular or semi-elliptical channels, with the recirculation channel 22 preferably having a depth of 1 μm to 50 μm and a radial dimension (diameter or radial maximum dimension) of 10 μm to 1000 μm. The wall surface of the return groove 22 near the groove 21 is configured to be flat to increase the area of the return groove 22 adjacent to the groove 21, thereby making it easier for the magnetic fluid 24 to flow into the return groove 22. In the present embodiment, the grooves 21 are annular grooves, the return grooves 22 are divided radially inside and outside the grooves 21, and the return grooves 22 on both sides of the grooves 21 may be asymmetrically distributed, and the return grooves 22 on each side may be uniformly distributed.
As above, the utility model provides a 24 lubricating structure of magnetic fluid is through setting up return tank 22 for magnetic fluid 24 can flow into in return tank 22 under the exogenic action such as pressure or centrifugal force, and under the inertial action, magnetic fluid 24 flows along return tank 22's cell wall, flow out in return tank 22 under the water conservancy diversion effect of the cell wall of return tank promptly, get back to slot 21 department, avoid flowing outside assembly surface 11, guarantee the fit clearance between two assembly surfaces 11, thereby reduce directly to take place the friction when motion between two assembly surfaces begins or finishes. And because the assembly clearance between two assembly surfaces 11 can be guaranteed, when entering chips or fine particle impurities between two assembly surfaces 11, the contact with the assembly surfaces 11 can be avoided, and the friction is avoided.
The utility model also provides a compressor is provided with above-mentioned 24 lubricating structure of magnetic current body on the assembly surface 11 between the moving part of mutual contact in the compressor. Preferably, the magnetic fluid 24 lubrication features are provided on the mating faces of the rollers and bearings, rollers and spacers, and/or crankshafts and thrust faces within the compressor pump body.
As shown in fig. 5, in the third embodiment, a protective layer 30 is disposed on the mounting surface 11, the protective layer 30 protects the mounting surface 11 from abrasion caused by friction, collision, and the like, and the thickness of the protective layer is preferably 0 to 100 μm.
Specifically, the protective layer 30 includes a wear-resistant coating layer provided on the mount face 11, the wear-resistant coating layer including a phosphate layer, a sulfide layer, a nitride layer, a carbide layer, a Ni — P layer, an alumina layer, and/or DLC (Diamond-like carbon). The wear-resistant coating further improves the wear resistance of the surface of the mounting surface 11, so that the mounting surface 11 is not damaged when in contact or collision under extreme conditions or some special conditions.
Preferably, the protective layer 30 may also comprise a lubricating coating comprising silicone, graphite, PTFE and/or MoS, provided on the mounting face 112Or any combination of lubricious coatings. When the assembling surfaces 11 are contacted, the lubricating coating plays a certain role in lubrication, and the two assembling surfaces 11 are prevented from being directly contacted to generate abrasion.
Further, the protective layer 30 may include both a wear-resistant coating and a lubricating coating, or alternatively, one of them may be selected, and the desired coating may be selected according to different working scenarios.
To sum up, the utility model provides a 24 lubricating structure of magnetic current body adopts 24 lubrication of magnetic current body to improve 24 lubricated reliability of magnetic current body through setting up the backwash trough 22, when being applied to equipment such as compressors with it on, can guarantee lubricated reliability between the spare part of mutual motion, avoid taking place the excessive wearing and tearing between the spare part, especially have fine lubrication and protection effect to the faster spare part of rotation or other types of velocity of motion. By adopting the magnetic fluid 24 lubricating structure, the design of a lubricating oil path can be simplified, and the use of lubricating oil can be reduced.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A magnetic fluid lubrication structure disposed on an assembly surface between relatively moving parts, comprising:
a groove (21) formed on the assembly surface (11), a permanent magnetic material (23) is arranged in the groove (21),
a magnetic fluid (24) arranged on the assembly surface (11), wherein the magnetic fluid (24) is limited at the position of the groove (21) under the action of the magnetic force of the permanent magnetic material (23), and forms a bulge on the assembly surface (11) as a lubricating structure between parts which move relatively,
the magnetic fluid is characterized in that a backflow groove (22) is formed in the assembling surface (11), the backflow groove (22) is located at a position close to the groove (21), and the magnetic fluid (24) can flow into the backflow groove (22) under the action of external force and flow along the groove wall of the backflow groove (22) and flow back to the position of the groove (21) under the flow guiding action of the groove wall of the backflow groove (22).
2. A magnetic fluid lubrication structure according to claim 1 wherein the thickness of the permanent magnetic material (23) is less than the depth of the groove (21), a portion of the magnetic fluid (24) being located within the groove (21) and another portion of the magnetic fluid (24) overflowing outside the groove (21).
3. Magnetic fluid lubrication structure according to claim 1, characterised in that the wall surface of the groove wall of the return groove (22) remote from the groove (21) is configured as a curved surface.
4. A magnetic fluid lubrication structure according to claim 3, characterized in that the return groove (22) is configured as a semicircular or semi-elliptical groove, and the wall surface of the return groove (22) near the groove (21) is configured as a plane.
5. Magnetic fluid lubrication structure according to claim 1, characterised in that the return groove (22) is provided in plurality, and the return grooves (22) are distributed on both sides of the groove (21).
6. A magnetic fluid lubrication structure according to any one of claims 1-5, wherein the groove (21) comprises a plurality of branch grooves arranged independently of each other, each branch groove is provided with the permanent magnetic material (23), and the distance between two adjacent branch grooves is 100-250 μm.
7. A magnetic fluid lubrication structure according to any one of claims 1-5 characterised in that the groove (21) is configured as an annular groove which is coaxial with the central axis of the mounting face (11).
8. A compressor, characterized in that the magnetic fluid lubricating structure according to any one of claims 1-7 is provided on the mounting surface (11) between the mutually contacting moving parts in the compressor.
9. The compressor of claim 8 wherein the magnetic fluid lubrication structure is disposed on mating faces of rollers and bearings, rollers and spacers, and/or crankshafts and thrust faces within the compressor pump body.
10. Compressor according to claim 8, characterized in that a protective layer (30) is provided on the mounting face (11), the thickness of the protective layer (30) being 0-100 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020487151.5U CN213063962U (en) | 2020-04-03 | 2020-04-03 | Magnetic fluid lubricating structure and compressor comprising same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020487151.5U CN213063962U (en) | 2020-04-03 | 2020-04-03 | Magnetic fluid lubricating structure and compressor comprising same |
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| CN213063962U true CN213063962U (en) | 2021-04-27 |
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| CN202020487151.5U Active CN213063962U (en) | 2020-04-03 | 2020-04-03 | Magnetic fluid lubricating structure and compressor comprising same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586230A (en) * | 2021-07-27 | 2021-11-02 | 北京理工大学 | End face lubricating and sealing structure of rotor engine |
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2020
- 2020-04-03 CN CN202020487151.5U patent/CN213063962U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586230A (en) * | 2021-07-27 | 2021-11-02 | 北京理工大学 | End face lubricating and sealing structure of rotor engine |
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