CN1548752A

CN1548752A - Air leakage prevention apparatus for closed compressor

Info

Publication number: CN1548752A
Application number: CNA031298443A
Authority: CN
Inventors: 安炳河; 沈在述; 金永宗
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2003-05-20
Filing date: 2003-05-20
Publication date: 2004-11-24
Anticipated expiration: 2023-05-20
Also published as: CN100359178C

Abstract

The present invention is gas leakage preventer for sealed compressor. The sealed compressor consists of cylinder assembly with sucking port and exhaust port and forming inside space; partitioning board to separate the sealed space, to forming sucking port pair and exhaust port pair and to rotate relative to the cylinder assembly; and vanes contacting with the corrugated surface of partitioning board and sliding. In the compressor, the vanes form curved surface with different curvature radii on two sides of the central line; the curvature radius in the compression side is relatively great and the gap between the vane and the partitioning board is reduced, so as to prevent compressed gas from leaking.

Description

Hermetic type compressor prevent the gas leakage device

Technical field

The invention belongs to vane compressor, what particularly relate to a kind of hermetic type compressor that prevents gas leakage prevents the gas leakage device.

Background technique

Fig. 1 is the longitudinal plane schematic representation according to the compressor section of the vane compressor of conventional art.

As shown in Figure 1, the formation according to the blade type hermetic type compressor of conventional art is: the inside upper part of casing (1) be provided with the mechanism portion that constitutes by stator (Ms) and gyrator (Mr) that produces power with; Be provided with in the bottom of mechanism portion with gyrator (Mr) thereby be connected fluid is sucked the formations such as compression mechanical part that compression spues.

Compression mechanical part as shown in the figure, its formation is: for suck and compression possessed the inner space and be fixed in casing (1) Lower Half cylinder (2) and; With the top of cylinder (2) with followingly be connected respectively, thereby form the upper bearing (3A) and the lower bearing (3B) of cylinder assembly body jointly; Connect respectively when combining that (3A 3B), thereby conveys to the power of mechanism portion on the running shaft (4) of compression mechanical part in conjunction with bearing with mechanism portion; Be combined in running shaft (4) or integrally formed, and the inner space (V) of cylinder (2) is divided into first space (S1) and second space (S2), bi-side respectively form the dividing plate (5) of the sinusoidal wave apperance of breach point up and down; On the two sides of dividing plate (5), contact with upper and lower end respectively, thereby make running shaft (4) when rotation respectively space (S1) (S2) is divided into first blade (6A) and second blade (6B) of suction field and compression field; Support blade (6A) (6B) the flexible first spring assembly body (7A) and the second spring assembly body (7B) respectively; Be arranged on the external profile surface of upper bearing (3A) and lower bearing (3B), be used for reducing the top baffler (8A) and the bottom baffler formations such as (8B) of the noise that spues that each space (S1) (S2) produces when spuing pressurized gas.

Dividing plate (5) is the center with running shaft (4), be to have certain thickness circle, when observing from its side, the convex surface part (r1) of projection and recessed concave surface portion (r2) are arranged, what formed connection convex surface part (r1) and concave surface portion (r2) simultaneously is connected curved face part (r3).That is, dividing plate is to form the curved surface with sine wave shape on the whole, differs 180 ° on its convex surface part (r1) and concave surface portion (r2) position.

Dividing plate is to be to cut on the arbitrary position, center when radial with running shaft (4), the cut-out line of running shaft (4) and dividing plate (5) always forms the right angle, thereby the front end that forms the convex surface part (r1) and the point of inflexion of concave surface portion (r2) is contacted respectively with bearing (3A) inner side surface up and down (3B), like this, promptly can smoothly slide, have to form airtight space.

The first, two blade (6A) (6B) smooth respectively be inserted in blade groove (3b ') that bearing (3A) possesses on (3B) (3b) on, form quadrangle form as shown in Figure 2 with certain thickness; The dividing plate surface of contact (R1) that contacts with the waveform curved surface of dividing plate (5) form have certain curvature around face; The outer side surface (R2) that contacts with the internal face of cylinder (2) contacts for the inboard upper thread with cylinder (2), and the inner side surface (F1) that contacts with the outer circumferential face of the reverse side running shaft (4) that forms convex surface forms the plane.

The bearing hole that unaccounted symbol 3a is a supporting rotating shaft in the drawing, 7a are the helical springs of supporting blade, and 7b is a spring housing, and SP is a suction pipe.

The operation of vane compressor in the past with above-mentioned formation is as follows.

Promptly, behind input power supply on the mechanism portion, gyrator (Mr) begins rotation, the running shaft (4) and the dividing plate (5) that are combined on the gyrator (Mr) together rotate along a certain direction, the blade (6A) that contacts respectively with the bi-side up and down of dividing plate (5) is (6B) along with the height of dividing plate (5), to-and-fro motion on the mutually opposite direction about pressing, thereby changing the volume of the 1st space (S1) and the 2nd space (S2), meanwhile, the cold media air that the suction port that possesses by said cylinder one side is new alternately also is drawn into the 1st space (S1) and the 2nd space (S2) continuously, this cooled coal gas body is compressed gradually with the rotation of dividing plate (5), then reach moment when saying beginning, alternately spue by/discharge opening (not shown) at the both sides crowning (R1) of dividing plate (5).

At this moment, when first blade (6A) and second blade (6B) rotate with dividing plate (5) along with the contact of the bi-side of dividing plate (5), will along with the concave surface portion (r2) of dividing plate (5) be connected facial (r3) and also have convex surface part (r1), move on edge two directions up and down, first blade (6A) and second blade (6B) have obtained flexible support according to helical spring (7a), after convex surface part (r1) through dividing plate (5), also have concave surface portion (r2) when contacting again with being connected facial (r3), according to the elastic return of helical spring (7a) to original position.

But, taken place in the vane compressor operating process according to conventional art: blade (6A) dividing plate surface of contact (R1) (6B), in order always to contact with dividing plate (5) line, is center with the centre in the side during (or radial) projection, has formed the convex surface that its both sides have same curvature.As shown in Figure 3, because the connection face (r3) of dividing plate (5) forms inclination, the Line of contact (P1) of above-mentioned dividing plate surface of contact (R1) forms on the rotation opposite direction mobile position of dividing plate (5) in Vertical direction in the heart slightly, as shown in Figure 4, the blade (6A) that contacts with running shaft (4) inner side surface (F1) (6B) is because be the plane, so its Line of contact (P2) is consistent with blade (6A) center (6B), so just produced slit (drawing is expressed as imaginary point and represents) (A) between (P2), thereby caused the problem points revealed by above-mentioned slit (A) pressurized gas at the Line of contact (P1) of dividing plate surface of contact (R1) and inner side surface (F1).

Summary of the invention

The present invention for solve the technical problem that exists in the above-mentioned technology provide a kind of prevent vane compressor that compressed gas is revealed from the outer circumferential face and the slit between the blade Line of contact of the bi-side of dividing plate and running shaft in advance prevent the gas leakage structure.

The technological scheme that the present invention takes for the technical problem that exists in the above-mentioned technology of solution is:

Be communicated with cylinder assembly body suction port and discharge opening and that form the inner space; The inner space is divided into several confined spaces, thereby makes the suction port of cylinder assembly body and discharge opening respectively form 1 pair, and dividing plate carries out relative rotary motion with respect to the cylinder assembly body simultaneously, and the gas in each confined space is moved, and forms the waveform curved surface; Contact and slide with the two side waveform curved surfaces up and down of dividing plate, and pump with respect to the cylinder assembly body, gas flow thereby card has broken in each confined space of cylinder assembly body makes on the hermetic type compressor that comprises several blades that gas obtains compressing; In the dividing plate surface of contact side projection near the blade of dividing plate bi-side, during as reference line, its reference line is mutually different the formations bending of curvature of the both sides at center with center line; Relative bigger of the curvature of compression travel direction side, thereby the Line of contact that makes the dividing plate surface of contact almost is consistent with Line of contact near the rotary side inner side surface, and reduced slit between two Line of contact by this, like this, just can prevent the leakage of compressed cold media air in advance.The dividing plate surface of contact of blade can form the both sides centre of curvature on sustained height and different vertical line, also can be on the same vertical line, form on the different height, also can be another centre of curvature of benchmark with the center of the side curvature at center, both sides forms on the parallel lines of same vertical and level, but also has at least a centre of curvature to form on reference line in each centre of curvature.

Advantage and good effect that the present invention has are: this compressor is because the blade dividing plate surface of contact of the waveform curved surface of close dividing plate, the curvature of compression travel direction side is relatively large, thereby make the Line of contact of blade dividing plate surface of contact almost consistent with Line of contact near the rotary side inner side surface, reduce the slit between two Line of contact, can prevent compressed gas leakage in advance like this.

Description of drawings

The stravismus schematic representation that Fig. 2 is is example according to a blade in the vane compressor of conventional art.

Fig. 3 and Fig. 4 are that signal is according to the blade of the vane compressor of conventional art and the front and the plane simple diagram of dividing plate contact condition.

The stravismus schematic representation that Fig. 5 is is example according to a blade in the vane compressor of the present invention.

Fig. 6 and Fig. 7 are that signal is according to the blade of vane compressor of the present invention and the front and the plane simple diagram of dividing plate contact condition.

Fig. 8-Figure 12 is according to the simple diagram of variation of illustrating blade respectively in the vane compressor of the present invention.

Explanation about drawing major component symbol:

5: dividing plate, 10A, 10B: the 1st, the 2 blade,

R1: dividing plate surface of contact, R2: the cylinder surface of contact,

F1: running shaft surface of contact, P1: running shaft Line of contact (reference line Line of contact),

P2: dividing plate Line of contact.

Embodiment

The stravismus schematic representation that Fig. 5 is is example according to a blade in the vane compressor of the present invention.Fig. 6 and Fig. 7 are that signal is according to the blade of vane compressor of the present invention and the front and the plane simple diagram of dividing plate contact condition.Fig. 8 and Figure 12 are according to the simple diagram of variation of illustrating blade respectively in the vane compressor of the present invention.

Just as shown in the figure, the formation of the compression mechanical part of foundation vane compressor of the present invention is: at the cylinder assembly body of casing (shown in Figure 1) (1) internal fixation setting; The cylinder assembly body is provided with that formation can be rotated and the inner space of cylinder assembly body is divided into the dividing plate (shown in Figure 1) (5) in the 1st and the 2nd space of confined space; What press setting in the bi-side up and down of dividing plate (5) is used to card first blade (10A) and second blade (10B) that body moves of dying.

The cylinder assembling bodily form becomes annular, formation is: the one side is can together be communicated with the space, both sides and the cylinder (shown in Figure 1) (2) that forms a suction port, fixedly install in the bi-side up and down of cylinder (2), and the upper bearing (shown in Figure 1) that together forms the inner space with cylinder (3A) and lower bearing (3B).

Upper bearing (shown in Figure 1) (3A) and the central authorities of lower bearing (3B) be respectively what connect to form for supporting rotating shaft (shown in Figure 1) (4) bearing hole, in bearing hole (shown in Figure 1) side (3a) in order to make (10B) axially smooth insertion of each blade (10A), formed blade groove (shown in Figure 1) respectively (3b), blade groove (shown in Figure 1) (3b) place between, each space for the suction port opposite that is communicated with cylinder (2) has formed discharge opening (not shown).

Dividing plate (5) is the center with running shaft (4), be to have certain thickness circle, when observing from its side, the convex surface part (r1) of projection and recessed concave surface portion (r2) are arranged, what formed connection convex surface part (r1) and concave surface portion (r2) simultaneously is connected curved face part (r3).That is, dividing plate is to form the curved surface with sine wave shape on the whole, and its convex surface part (r1) and concave surface portion (r2) position differ 180 °.

The the 1st and the 2nd blade (10A) (10B) forms as shown in Figure 5 the quadrangle form with certain thickness; The dividing plate surface of contact (R1) that contacts with the waveform curved surface of dividing plate (5) form have certain curvature around face; The outer side surface (R2) that contacts with the internal face of cylinder (2) contacts with the inboard upper thread of cylinder (2), and the inner side surface (F1) that contacts with the outer circumferential face of the running shaft (4) that forms convex surface forms the plane.Dividing plate surface of contact (R1) is as Fig. 6 and shown in Figure 7, the formation that the waveform curved surface of dividing plate (5) curvature in accordance with regulations tilts, with the close Line of contact (P1) of the waveform curved surface of dividing plate surface of contact (R1) and dividing plate (5) for as far as possible (10B) and Line of contact (P2) side of running shaft (4) near blade (10A), during side projection, when being reference line (CL) with the centre of Vertical direction the compression travel direction the opposite form curvature 1., than the 1. big curvature of curvature 2. the opposite side pressure indentation line direction of reverse side has formed.1. curvature (O2) form different vertical wire at same height with curvature center (O1) 2. as shown in Figure 6, perhaps 1. curvature (O2) form different height in same vertical wire with curvature center (O1) 2. as shown in Figure 8, perhaps as shown in Figure 9, when being benchmark with curvature center (O1) 1., curvature center (O2) 2. forms vertical and horizontal wire.

Under each situation, the formation that curvature center (O1) 1. is positioned on the reference line (CL) can make curvature processing 1. be more prone to, and to shown in Figure 12, the side that curvature center (O1) 1. also can be positioned at reference line (CL) forms as Figure 10.

Gave same symbol with a part in the drawing Yu in the past.

Unaccounted symbol a is meant the slit between the Line of contact of the Line of contact of dividing plate surface of contact and running shaft in the drawing.

Action effect according to hermetic type compressor of the present invention is as follows.

Promptly, behind input power supply on the mechanism portion, running shaft (4) begins rotation, together rotate with the dividing plate that is combined in running shaft (4) (5), the inner space of cylinder (V) sucks cold media air, at this moment gas is in the high speed rotating process of dividing plate (5), and (10A) (10B) is compressed according to blade, then alternately spues by each space (S1) discharge opening (not shown) (S2).

Here, each blade (10A) is (10B) when rotating with dividing plate (5) along with the surface of contact of the bi-side of dividing plate (5), the concave surface portion (r2) that to pass through dividing plate (5) continuously be connected facial (r3) and also have convex surface part (r1), move back and forth up and down axially, at this moment, each blade (10A) dividing plate surface of contact (R1) (10B) of the waveform curved surface of close dividing plate (5) as shown in Figure 6, be the center with its Centromedian reference line (CL) during side projection, 1. 2. the left and right sides forms different curvature, particularly because the curvature of compression travel direction or rotation travel direction is 2. relatively large, the Line of contact (P2) of the waveform curved surface of dividing plate (5) and close therewith dividing plate surface of contact (R1) almost is consistent mobile to reference line (CL) side (or running shaft Line of contact (P1)).

Like this, inner side surface near the blade on the outer circumferential face of running shaft, wherein Line of contact and the reference line that forms in central authorities substantially forms on same position, the Line of contact of dividing plate surface of contact also be with the almost approaching position of reference line on form, spacing between two Line of contact reduces thus, there is the slit hardly, leakage that therefore can MIN minimizing pressurized gas.

Have again, even the dividing plate surface of contact of blade contacts with the waveform camberline of dividing plate, the long-time words of using, because of slide relative at a high speed produces friction, during because of the contact of friction line contact becoming face, the curvature of compression travel direction is relatively large, and what form on the whole is comparatively satisfactory, and the increase of face area of contact also can effectively reduce the leakage of gas.

Claims

A hermetic type compressor prevent the gas leakage device, it is to be communicated with cylinder assembly body suction port and discharge opening and that form the inner space; The inner space is divided into several confined spaces, thereby makes the suction port of cylinder assembly body and discharge opening respectively form 1 pair, and dividing plate carries out relative rotary motion with respect to the cylinder assembly body simultaneously, and the gas in each confined space is moved, and forms the waveform curved surface; Contact and slide with the two side waveform curved surfaces up and down of dividing plate, and pump with respect to the cylinder assembly body, gas flow thereby card has broken in each confined space of cylinder assembly body, make on the hermetic type compressor of several blades that gas obtains compressing, it is characterized in that in the dividing plate surface of contact side projection near the blade of dividing plate bi-side, when being reference line with its center line, its reference line is the mutually different formation bending of curvature of the both sides at center; Relative bigger of the curvature of compression travel direction side, thus the Line of contact of the Line of contact that makes the dividing plate surface of contact and close rotary side inner side surface almost is consistent, and reduced slit between two Line of contact by this.
Hermetic type compressor according to claim 1 prevent the gas leakage device, it is characterized in that the both sides centre of curvature of the dividing plate surface of contact of blade can form on sustained height and different vertical line.
Hermetic type compressor according to claim 1 prevent the gas leakage device, it is characterized in that the both sides centre of curvature of the dividing plate surface of contact of blade can form on same vertical line and different height.
4. prevent the gas leakage device according to claim 1 or the described hermetic type compressor of claim 3, the both sides centre of curvature that it is characterized in that the dividing plate surface of contact of blade is that another centre of curvature of benchmark can only vertically and on the parallel lines of level form same with a side centre of curvature.
According to claim 1 or the described hermetic type compressor of claim 4 prevent the gas leakage device, it is characterized in that each centre of curvature of the dividing plate surface of contact of blade has at least a centre of curvature to form on reference line.
A hermetic type compressor prevent the gas leakage device, it is to be communicated with cylinder assembly body suction port and discharge opening and that form the inner space; The inner space is divided into a plurality of confined spaces, thereby makes the suction port of cylinder assembly body and discharge opening respectively form 1 pair, and dividing plate carries out relative rotary motion with respect to the cylinder assembly body simultaneously, and the gas in each confined space is moved, and forms the waveform curved surface; Contact and slide with the two side waveform curved surfaces up and down of dividing plate, and be combined into respect to the cylinder assembly body and pump, gas flow thereby card has broken in each confined space of said cylinder assembly body, the hermetic type compressor that comprises plurality of vanes that makes gas obtain compressing; In the dividing plate surface of contact upper side projection near the blade of the bi-side of dividing plate, during as reference line, be mutually different the formations bending of curvature of the both sides at center with its reference line with central authorities; It is characterized in that relative bigger of the curvature of the pressured indentation line direction of both sides curvature side of blade zoning surface of contact, thereby the Line of contact that makes the dividing plate surface of contact almost is consistent with Line of contact near the rotary side inner side surface, and has reduced slit between two Line of contact by this.