CN113482929A - Sealing structure for reducing leakage of rolling rotor compressor - Google Patents
Sealing structure for reducing leakage of rolling rotor compressor Download PDFInfo
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- CN113482929A CN113482929A CN202110986279.5A CN202110986279A CN113482929A CN 113482929 A CN113482929 A CN 113482929A CN 202110986279 A CN202110986279 A CN 202110986279A CN 113482929 A CN113482929 A CN 113482929A
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- arc
- rolling rotor
- sliding block
- rotor
- groove
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- 238000005096 rolling process Methods 0.000 title claims abstract description 88
- 238000007789 sealing Methods 0.000 title claims abstract description 17
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/001—Radial sealings for working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
- F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/601—Shaft flexion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention belongs to the technical field of rolling rotor compressors, and relates to a structure of a rotor and a sliding block of a rolling rotor compressor for reducing leakage, in particular to a sealing structure for reducing leakage of the rolling rotor compressor, which comprises a rolling rotor and a sliding block, wherein the end part of the sliding block is an arc with the radius of r, the outer circumference of the rolling rotor is provided with a groove, and the groove consists of arc curves of sections A-B, B-C and C-D; the radius of the B-C section arc is equal to that of the end arc of the sliding block. The invention provides a novel matching mode of a sliding block and a rolling rotor, and the contact mode of the sliding block and the rolling rotor is changed into surface-to-surface sealing through the improvement of the outer circumferential curved surface of an eccentric rotor, so that the sealing area is effectively increased, the leakage rate is reduced, and the volume efficiency of the rolling rotor type compressor is favorably improved.
Description
Technical Field
The invention belongs to the technical field of rolling rotor compressors, relates to a structure of a rotor and a sliding block of a rolling rotor compressor for reducing leakage, and particularly relates to a sealing structure for reducing leakage of the rolling rotor compressor.
Background
The rolling rotor compressor belongs to one of positive displacement compressors and is widely applied to household air conditioners, small refrigeration and heat pump devices. In the working process of the rolling rotor type compressor, the sliding block slides in the sliding groove and reciprocates in the sliding groove along the radial direction of the rotor, the end part of the sliding block is always contacted with the outer circumferential surface of the eccentric rolling rotor under the action of spring force, the inner circumferential surface of the cylinder, the upper end cover and the lower end cover of the cylinder and the eccentric rotor enclose a closed working cavity, the sliding block divides the working cavity into a high-pressure cavity and a low-pressure cavity, and an air inlet and exhaust hole is formed in the cylinder.
Because the high-pressure chamber and the low-pressure chamber have pressure difference, leakage from the high-pressure chamber to the low-pressure chamber can be formed, the exhaust volume is reduced, the refrigerating capacity of the compressor is reduced, and particularly under the condition that the pressure difference of the high-pressure chamber and the low-pressure chamber is large, the leakage is larger, and the volumetric efficiency of the compressor is seriously influenced. At present, the contact mode of the sliding block and the rolling rotor is mostly a line sealing mode, Chinese patent CN110388321A provides a surface contact leakage-proof swing type sliding block structure, a sliding block contact piece is added on the sliding block, and the front side wall of the sliding block contact piece is provided with an inwards concave arc-shaped curved surface for surface contact with the outer circumference of the eccentric rotor, so that the leakage area is increased, and the leakage amount is reduced. However, the slider contact piece is added, so that the complexity of the rolling rotor type compressor mechanism is increased, the slider and the slider contact piece are required to be connected, and the friction power consumption between the contact piece and the eccentric rotor is increased due to the overlarge surface contact area. Chinese patent CN210715100U is an embedded rotor compressor, similar to sliding vane compression, the structural principle of sliding vane compressor is used for reference, the sliding vane compressor is that a slot is opened on the rotor, there is a sliding vane in the slot, and there is no slot on the cylinder, in the process of rotor rotation, the sliding vane makes the other end of the sliding vane cling to the inner wall of the cylinder by centrifugal force or spring or other pressure in the sliding slot of the rotor, the mentioned spacing hole is just like the sliding slot in the conventional rolling rotor compressor, this kind of structure can be regarded as that the sliding slot of the conventional rolling rotor compressor is opened on the rolling rotor, the sliding slot of the normal rolling rotor compressor is opened on the cylinder, the sliding block reciprocates in the sliding slot, and the other end of the sliding block contacts with the rolling rotor. The working principle of the sliding block in the sliding groove is similar to that of a conventional rolling rotor compressor, leakage exists, and the possible result is that the field of the sliding block is tangent to the inner wall surface of the cylinder, because the inner wall surface of the cylinder is consistent with the circle center direction of the arc at the bottom of the sliding block, namely, the inner side of the sliding block is tangent.
In the rolling rotor compressor, the contact and friction pair between the sliding block and the eccentric rotor is one of the main leakage channels and leakage paths of the rolling rotor compressor, while in the current rolling rotor compressor, the excircle of the rolling rotor is circular, the end part of the sliding block has a certain radian, the contact mode between the sliding block and the rolling rotor is basically a linear sealing mode, and the leakage amount is large.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a sealing structure for reducing leakage of a rolling rotor compressor, and provides a novel matching mode of a sliding block and a rolling rotor.
The technical scheme of the invention is as follows:
the sealing structure for reducing leakage of the rolling rotor compressor comprises a rolling rotor and a sliding block, wherein the end part of the sliding block is an arc with the radius of r, a groove is arranged on the outer circumference of the rolling rotor, and the groove consists of arc curves of sections A-B, B-C and C-D; the radius of the B-C section arc is equal to that of the end arc of the sliding block.
Further, the excircle curve of the rolling rotor consists of an A-B-C-D-A section arc curve, the groove is an arc groove consisting of an A-B-C-D section curve, A-B and C-D are modified arc sections, C-D and A-B are symmetrical arcs, the A-B arc is tangent to the B-C arc at a point B, and the A-B arc is tangent to the A-D arc at a point A; the C-D arc is tangent to the B-C arc at the point C, and the C-D arc is tangent to the A-D arc at the point D.
Further, the center O1 of the end part arc of the sliding block is on the central line of the sliding block in the vertical direction, and the spreading angle of the end part arc of the sliding block is 180 degrees; the center of the rolling rotor is O ', and the A-B-C-D section curve is symmetrical along O' O1.
Further, the arc at the end of the sliding block is matched with the arc at the B-C section of the groove, the circle center of the arc at the B-C section is positioned on the excircle of the rolling rotor, and when the arc at the end of the sliding block is connected with the groove, the circle center of the arc at the B-C section is concentric with the arc at the end of the sliding block.
The rolling rotor is sleeved on the crankshaft, the rolling rotor and the crankshaft are designed integrally, and the rolling rotor rolls along the inner wall surface of the cylinder under the rotation of the crankshaft; the spring is connected with the sliding block and applies pressure to the sliding block to enable the sliding block to be connected with the rolling rotor.
Further, the outer circumference radius of the rolling rotor is R, the cylinder radius is Rc, and the eccentricity e is Rc-R; the center of the cylinder is O, the center of the rolling rotor is O ', the tangent line of the connecting line of O' and O1 is O1E, the included angle between O1E and O1C is theta, and the theta needs to satisfy the relation that the theta is more than or equal to arcsin (e/R); the arc length of the B-C section arc should satisfy
The invention has the beneficial effects that:
(1) the invention ensures that the sliding block and the rotor always keep surface-to-surface contact in the running process of the compressor by improving the curved surfaces of the outer circumferences of the sliding block and the rolling rotor, and increases the sealing area, thereby reducing the gas leakage from the high-pressure cavity to the low-pressure cavity and improving the efficiency of the compressor.
(2) Aiming at the structure that the arc at the top of the sliding block and the arc of the rolling rotor are in external tangency in the conventional rolling rotor compressor, the invention provides that a groove structure which is formed by a plurality of sections of curves and is arranged on the rolling rotor is regular, the groove structure is matched with the arc at the end part of the sliding block, and the derivation of geometric relation can ensure that the contact between the sliding block and the outer wall surface of the rolling rotor always keeps surface-surface contact in the rotating process of the rolling rotor so as to reduce the leakage passing through the groove structure and solve the problems of line contact and line sealing caused by the external tangency between the sliding block and the rolling rotor.
Drawings
FIG. 1 is a schematic view of a seal structure for a rolling rotor compressor to reduce leakage according to the present invention;
FIG. 2 is a schematic view of a slider and rotor assembly provided by the present invention;
FIG. 3 is a schematic view of the geometry of the slider and rotor provided by the present invention;
in the above figures, 1, cylinder; 2. a slider; 3. a spring; 4. a rolling rotor; 5. a crankshaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For a further understanding of the invention, reference will now be made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in fig. 1 to 2, the present embodiment provides a sealing structure for reducing leakage of a rolling rotor compressor, comprising a rolling rotor 4 and a sliding block 2, wherein the end of the sliding block 2 is an arc with a radius of r, and a groove is provided on the outer circumference of the rolling rotor 4, and the groove is composed of arc curves of sections a-B, B-C and C-D; the radius of the B-C section arc is equal to that of the end arc of the sliding block 2, namely the radius of the B-C section arc is r, and the value of the radius is equal to that of the end arc of the sliding block 2.
The excircle curve of the rolling rotor 4 consists of an A-B-C-D-A section arc curve, the circle center of the B-C section arc is positioned on the excircle of the rolling rotor 4 and is concentric with the end arc of the sliding block 2 when in work. In the working process, a sealing curved surface formed by the mutual meshing of the B-C section arc and the end arc of the sliding block 2 is formed between the sliding block 2 and the rolling rotor 4.
The groove is an arc-shaped groove consisting of A-B-C-D section continuous curves, wherein A-B and C-D are modified arc sections, A-B and C-D are symmetrical arcs and are tangent to the curves at two ends, namely the A-B arc is tangent to the B-C arc at a point B, the A-B arc is tangent to the A-D arc at a point A, the C-D arc is tangent to the B-C arc at a point C, and the C-D arc is tangent to the A-D arc at a point D; the curve of the section A-B-C-D is symmetrical along the curve of O' O1.
As shown in the geometric relationship between the slider 2 and the rolling rotor 4 in fig. 3, the radius of the cylinder 1 is Rc, the radius of the outer circumference of the rolling rotor 4 is R, e is the eccentricity, e is Rc-R, O is the center of the cylinder 1, and O' is the center of the rolling rotor 4. Through the structural arrangement and the geometric relation of the sliding block 2 and the rolling rotor 4, the rolling rotor 4 can be ensured to be always in surface-to-surface contact with the sliding block 2 in the process of rotating for a circle in the cylinder 1. The specific structure and geometrical relationship are as follows: the end part of the sliding block 2, which is contacted with the outer circumference of the rolling rotor 4, is an arc, the radius of the arc is r, the center O1 of the arc is on the central line of the sliding block 2 in the vertical direction, and the expansion angle of the arc is 180 degrees; the outer circumference curve of the rolling rotor 4 consists of A-B-C-D-A, wherein the radius of the arc of the section B-C is r, the radius of the arc of the section B-C is equal to the radius of the arc of the end part of the sliding block 2, the center of the circle is on the outer circle of the rolling rotor 4 and is concentric with the arc of the end part of the sliding block 2. A-B and C-D of the groove are modified arc sections which are tangent with curves at two ends, namely the arc A-B is tangent with the arc A-D at the point A, and the modified curve sections A-B-C-D are symmetrical along O' O1. As can be seen from fig. 3, when the rolling rotor 4 rotates to any rotation angle, if the straight line O1E is a tangent line of the connecting line between the center O' of the rolling rotor 4 and O1, and the included angle between O1E and O1C is θ, θ should satisfy the following relation for the corrected curve segment a-B-C-D of the rolling rotor 4: theta is more than or equal to arcsin (e/R), the section B-C is the length of a curve for surface-surface sealing with the slide block 2, and the arc length of the section BC is required to meet the requirement
It can be understood that, as shown in fig. 1, the air cylinder further comprises an air cylinder 1, a crankshaft 5 and a spring 3, the rolling rotor 4 is sleeved on the crankshaft 5, the rolling rotor 4 and the crankshaft 5 are designed integrally, and under the rotation action of the crankshaft 5, the rolling rotor 4 rolls on the inner wall surface of the air cylinder 1; the spring 3 is connected with the sliding block 2 and applies pressure to the sliding block 2 to enable the sliding block to be in surface contact with the rolling rotor 4, the end part of the sliding block 2 is in close contact with the rolling rotor 4 by the acting force of the spring 3, and the working cavity is divided into a left high-pressure cavity and a right low-pressure cavity. Through the improvement of the structures of the sliding block 2 and the rolling rotor 4, the rolling rotor 4 can be ensured to be always in surface-to-surface contact with the sliding block 2 in the process of rotating for one circle.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or modification made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The sealing structure for reducing leakage of the rolling rotor compressor is characterized by comprising a rolling rotor and a sliding block, wherein the end part of the sliding block is an arc with the radius of r, a groove is arranged on the outer circumference of the rolling rotor, and the groove consists of arc curves of sections A-B, B-C and C-D; the radius of the B-C section arc is equal to that of the end arc of the sliding block.
2. The seal structure of claim 1, wherein the excircle curve of the rolling rotor is composed of a-B-C-D-a arc curve, and the groove is an arc groove composed of a-B-C-D curve, wherein a-B and C-D are modified arc sections, and C-D and a-B are symmetrical arcs, the a-B arc is tangent to the B-C arc at point B, and the a-B arc is tangent to the a-D arc at point a; the C-D arc is tangent to the B-C arc at the point C, and the C-D arc is tangent to the A-D arc at the point D.
3. The seal structure of claim 1, wherein a center O1 of the slider end arc is on a slider vertical center line, and the slider end arc opens out by an angle of 180 °; the center of the rolling rotor is O ', and the A-B-C-D section curve is symmetrical along O' O1.
4. The seal structure according to claim 1, wherein the slider end portion arc is matched with a B-C section arc of the groove, the center of the B-C section arc is on the outer circumference of the rolling rotor, and when the slider end portion arc is joined to the groove, the center of the B-C section arc is concentric with the slider end portion arc.
5. The sealing structure according to claim 1, further comprising a cylinder, a crankshaft and a spring, wherein the rolling rotor is sleeved on the crankshaft, the rolling rotor and the crankshaft are designed integrally, and the rolling rotor rolls along the inner wall surface of the cylinder under the rotation of the crankshaft; the spring is connected with the sliding block and applies pressure to the sliding block to enable the sliding block to be connected with the rolling rotor.
6. The seal structure according to any one of claims 1 to 5, wherein an outer circumferential radius of the rolling rotor is R, a cylinder radius is Rc, and an eccentricity e-R; the center of the cylinder is O, the center of the rolling rotor is O ', the tangent line of the connecting line of O' and O1 is O1E, the included angle between O1E and O1C is theta, and the theta needs to satisfy the relation that the theta is more than or equal to arcsin (e/R); the arc length of the B-C section arc should satisfy
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110986279.5A CN113482929B (en) | 2021-08-26 | 2021-08-26 | Sealing structure for reducing leakage of rolling rotor compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110986279.5A CN113482929B (en) | 2021-08-26 | 2021-08-26 | Sealing structure for reducing leakage of rolling rotor compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113482929A true CN113482929A (en) | 2021-10-08 |
| CN113482929B CN113482929B (en) | 2023-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110986279.5A Active CN113482929B (en) | 2021-08-26 | 2021-08-26 | Sealing structure for reducing leakage of rolling rotor compressor |
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| Country | Link |
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| CN (1) | CN113482929B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09287584A (en) * | 1996-04-18 | 1997-11-04 | Matsushita Electric Ind Co Ltd | Rotary compressor |
| CN105971878A (en) * | 2016-06-15 | 2016-09-28 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor type compressor pump body |
| CN106762638A (en) * | 2016-11-30 | 2017-05-31 | 浙江海洋大学 | A kind of translation piston compressor |
| CN110388321A (en) * | 2019-07-29 | 2019-10-29 | 黄石东贝电器股份有限公司 | A kind of face contact anti-leak swing type slide block mechanism |
| US20210017984A1 (en) * | 2019-07-17 | 2021-01-21 | Lg Electronics Inc. | Rotary compressor |
-
2021
- 2021-08-26 CN CN202110986279.5A patent/CN113482929B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09287584A (en) * | 1996-04-18 | 1997-11-04 | Matsushita Electric Ind Co Ltd | Rotary compressor |
| CN105971878A (en) * | 2016-06-15 | 2016-09-28 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor type compressor pump body |
| CN106762638A (en) * | 2016-11-30 | 2017-05-31 | 浙江海洋大学 | A kind of translation piston compressor |
| US20210017984A1 (en) * | 2019-07-17 | 2021-01-21 | Lg Electronics Inc. | Rotary compressor |
| CN110388321A (en) * | 2019-07-29 | 2019-10-29 | 黄石东贝电器股份有限公司 | A kind of face contact anti-leak swing type slide block mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113482929B (en) | 2023-04-21 |
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