CN113513595B

CN113513595B - Integrated leakage-free labyrinth oil seal structure of centrifugal compressor

Info

Publication number: CN113513595B
Application number: CN202110511447.5A
Authority: CN
Inventors: 林恒军
Original assignee: Wuxi Altec Compressor Co ltd
Current assignee: Wuxi Altec Compressor Co ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2023-06-27
Anticipated expiration: 2041-05-11
Also published as: CN113513595A

Abstract

The invention relates to the technical field of centrifugal compressors and provides an integrated leakage-free labyrinth oil seal structure of a centrifugal compressor, which comprises a labyrinth oil seal body, a high-speed gear shaft, a through hole and an oil hole, wherein the high-speed gear shaft penetrates through the middle position inside the labyrinth oil seal body, the through holes are formed in two ends between the high-speed gear shaft and the labyrinth oil seal body, the oil hole is formed in one side of the through hole, a fixing structure is arranged at the top end of one side inside the labyrinth oil seal body, the fixing structure comprises a positioning groove, a telescopic spring, a clamping block, a slotting and a pulling block, the positioning groove is formed in one side of the surface of the labyrinth oil seal body, the telescopic groove is formed in the lower part inside the positioning groove, the telescopic spring is connected with the top end of the telescopic spring, and the defect that the assembly efficiency of the integrated leakage-free labyrinth oil seal structure of the conventional centrifugal compressor is low and the assembly rate is influenced is overcome.

Description

Integrated leakage-free labyrinth oil seal structure of centrifugal compressor

Technical Field

The invention relates to the technical field of centrifugal compressors, in particular to an integrated leakage-free labyrinth oil seal structure of a centrifugal compressor.

Background

The labyrinth oil seal structure in the centrifugal compressor is indispensable, the labyrinth oil seal structure on the market is more in variety at present, and the use requirement can be basically met, wherein the labyrinth oil seal structure is an integrated labyrinth oil seal structure;

for this reason, the patent with publication number CN20217864U discloses an oil seal structure for a high-speed motor, which comprises a casing, a bearing and a rotor, wherein the rotor is installed on the central axis of a bearing hole of the casing through the bearing, and a boss on the inner side of the bearing hole of the casing is sequentially provided with a first O-ring, a first oil seal, a second O-ring and a second oil seal; the first oil seal and the second oil seal are provided with a plurality of saw teeth, and the saw teeth and the rotor form a labyrinth seal structure; the rotor is provided with three convex rings, and the three convex rings divide the saw teeth into three small sections to form a three-stage labyrinth structure and form a first-stage space, a second-stage space and a third-stage space. The invention has simple, compact and reasonable structure; the pressure balance hole above the interstage space can weaken the phenomenon of adsorption retardation of lubricating oil, so that the lubricating oil can timely return into an oil tank through the oil return hole below, and meanwhile, the height of the convex ring on the rotor is higher, so that the leakage transmission capacity of the oil in the interstage can be effectively weakened, and the tightness of the labyrinth oil seal structure is improved; however, the traditional oil seal structure has the defects that firstly, the existing integrated oil seal structure is low in assembly efficiency, and the assembly rate is affected; secondly, the occurrence of oil seepage condition can appear in current oil blanket structure, and leak protection oil measure is done inadequately.

Disclosure of Invention

First, the technical problem to be solved

The invention aims to provide an integrated leakage-free labyrinth oil seal structure of a centrifugal compressor, which is used for solving the defects that the assembly efficiency of the integrated leakage-free labyrinth oil seal structure of the traditional centrifugal compressor is low and the assembly rate is influenced.

(II) summary of the invention

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an integrated no-leakage labyrinth oil seal structure of centrifugal compressor, includes labyrinth oil seal body, high-speed gear shaft, through-hole and oilhole, the inside intermediate position department of labyrinth oil seal body runs through there is the high-speed gear shaft;

through holes are formed in two ends between the high-speed gear shaft and the labyrinth type oil seal body, and oil holes are formed in one side of each through hole;

the top of the inside one side of labyrinth oil blanket body is provided with fixed knot constructs, fixed knot constructs including constant head tank, expansion groove, expansion spring, fixture block, fluting and draws the piece, the constant head tank sets up in one side on labyrinth oil blanket body surface, the below of the inside of constant head tank is provided with the expansion groove, the inside of expansion groove is provided with expansion spring, expansion spring's top is connected with the fixture block, the fluting is seted up in one side that is close to the constant head tank on labyrinth oil blanket body surface, grooved surface is provided with draws the piece.

Preferably, the inside intermediate position department of labyrinth oil blanket body is provided with storage structure, storage structure includes oil plug, oil pipe, oiling mouth and fixed shell fragment, the oiling mouth is seted up in the inside intermediate position department of labyrinth oil blanket body.

Preferably, the bottom of the pulling block is fixedly connected with the clamping block in the telescopic groove, and a welding integrated structure is arranged between the pulling block and the clamping block.

Preferably, one end of the clamping block penetrates through and extends to the inside of the positioning groove, and the clamping block forms an elastic telescopic structure in the inside of the telescopic groove by using a telescopic spring.

Preferably, an anti-leakage structure is arranged on one side inside the oil hole, the anti-leakage structure comprises an oil sealing ball, a screw groove, a ball and a convex ring, the oil sealing ball is arranged on one side outside the oil hole, the convex ring is arranged on one side inside the oil hole, and the screw groove is arranged at the bottom end of the convex ring.

Preferably, an oil pipe is arranged in the oil filling port, and the oil pipe is distributed in the oil filling port in an S shape.

Preferably, the length of the oil pipe is longer than the depth of the oil filling port, and the caliber of the oil pipe is smaller than the width of the inner wall of the oil filling port.

Preferably, the oil plug is inserted in the outside of the oil filling port, fixed elastic pieces are arranged on two sides of the oil plug, buckling grooves matched with the fixed elastic pieces are formed on two sides, close to the fixed elastic pieces, of the surface of the labyrinth oil seal body, and the fixed elastic pieces and the buckling grooves on the surface of the labyrinth oil seal body form a clamping structure.

Preferably, the convex ring is screwed into the screw groove by using the bottom thread, balls are arranged on two sides of the surface of the convex ring, and the convex ring is in threaded connection with the screw groove.

(III) beneficial effects

The invention provides an integrated leakage-free labyrinth oil seal structure of a centrifugal compressor, which has the advantages that: through being provided with fixed knot constructs, the plug inserts the inside of constant head tank on the labyrinth oil blanket body shell and fixes a position, and the pulling block on the downward pulling fluting of inserting simultaneously, the fixture block is retrieved to the inside of flexible groove under the effect of pulling the piece, and after the plug is put into completely, unclamp and draw the piece, under the effect of flexible spring in the flexible groove, the fixture block resets and blocks and go into the opening that the plug presets, fixes;

through the anti-leakage structure, oil leakage is likely to occur at one side of the oil hole, a screw groove is formed in one side of the inside of the oil hole, a convex ring is inserted into the screw groove by utilizing bottom threads, balls are arranged at two sides of the surface of the convex ring, the convex ring is not influenced when the high-speed gear shaft rotates, meanwhile, an oil sealing ball is added at the other side of the oil hole, the height of the convex ring is utilized to block one side of oil, and the other side of the convex ring is sealed by adopting the oil sealing ball;

through being provided with the storage structure, take this labyrinth oil blanket body to required position department and use, carry out the oiling operation through the oiling mouth, oil pipe adopts snakelike design in the oiling mouth, increases oil pipe's length, can make more oil storage in oil pipe's inside when the oiling, utilizes oil pipe bottom entering through-hole and the inside use of oilhole, improves inside lubrication effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional elevation view of the present invention;

FIG. 2 is a schematic elevational view of the present invention;

FIG. 3 is an enlarged schematic view of the structure of FIG. 1A according to the present invention;

FIG. 4 is a schematic diagram of the oil plug of the present invention;

fig. 5 is an enlarged schematic view of the structure of fig. 2B according to the present invention.

Reference numerals in the drawings illustrate: 1. a labyrinth type oil seal body; 2. a fixed structure; 201. a positioning groove; 202. a telescopic slot; 203. a telescopic spring; 204. a clamping block; 205. slotting; 206. pulling blocks; 3. a high-speed gear shaft; 4. a through hole; 5. an oil hole; 6. a storage structure; 601. an oil plug; 602. an oil pipe; 603. an oil filling port; 604. a fixed spring plate; 7. an anti-seepage structure; 701. sealing oil balls; 702. a screw groove; 703. a ball; 704. a convex ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by one of ordinary skill in the art without inventive faculty, are intended to be within the scope of the present invention, based on the embodiments of the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-5, the integrated leakage-free labyrinth oil seal structure of a centrifugal compressor provided by the invention comprises a labyrinth oil seal body 1, a high-speed gear shaft 3, a through hole 4 and an oil hole 5, wherein the high-speed gear shaft 3 penetrates through the middle position inside the labyrinth oil seal body 1;

through holes 4 are formed in two ends between the high-speed gear shaft 3 and the labyrinth oil seal body 1, and oil holes 5 are formed in one side of each through hole 4;

the top of one side of the inside of the labyrinth seal body 1 is provided with a fixing structure 2, the fixing structure 2 comprises a positioning groove 201, a telescopic groove 202, a telescopic spring 203, a clamping block 204, a slot 205 and a pull block 206, the positioning groove 201 is arranged on one side of the surface of the labyrinth seal body 1, the telescopic groove 202 is arranged below the inside of the positioning groove 201, the telescopic spring 203 is arranged inside the telescopic groove 202, the top of the telescopic spring 203 is connected with the clamping block 204, the slot 205 is arranged on one side of the surface of the labyrinth seal body 1, which is close to the positioning groove 201, the surface of the slot 205 is provided with the pull block 206, the bottom end of the pull block 206 is fixedly connected with the clamping block 204 in the telescopic groove 202, a welding integrated structure is arranged between the pull block 206 and the clamping block 204, one end of the clamping block 204 penetrates and extends into the inside of the positioning groove 201, and the clamping block 204 forms an elastic telescopic structure inside the telescopic groove 202 by using the telescopic spring 203;

when the structure is used, the plug on the outer shell of the labyrinth oil seal body 1 is inserted into the positioning groove 201 to be positioned, the pull block 206 on the slot 205 is pulled downwards while being inserted, the clamping block 204 is recovered to the inside of the expansion groove 202 under the action of the pull block 206, after the plug is completely put into the expansion groove 202, the pull block 206 is loosened, and under the action of the expansion spring 203 in the expansion groove 202, the clamping block 204 is reset and clamped into an opening preset by the plug to be fixed;

the middle position inside the labyrinth oil seal body 1 is provided with a storage structure 6, the storage structure 6 comprises an oil plug 601, an oil pipe 602, an oil filling port 603 and a fixed elastic sheet 604, the oil filling port 603 is arranged at the middle position inside the labyrinth oil seal body 1, the oil pipe 602 is distributed inside the oil filling port 603 in an S shape, the length of the oil pipe 602 is longer than the depth of the oil filling port 603, the caliber of the oil pipe 602 is smaller than the width of the inner wall of the oil filling port 603, the oil plug 601 is inserted outside the oil filling port 603, two sides of the oil plug 601 are provided with fixed elastic sheets 604, two sides, close to the fixed elastic sheets 604, of the surface of the labyrinth oil seal body 1 are provided with buckling grooves which are matched with the fixed elastic sheets 604, and the buckling grooves on the surface of the labyrinth oil seal body 1 form a clamping structure;

when the labyrinth type oil seal is used, the labyrinth type oil seal body 1 is taken to a required position for use, oil injection operation is carried out through the oil injection port 603, the oil pipe 602 in the oil injection port 603 adopts a serpentine design, the length of the oil pipe 602 is increased, more oil can be stored in the oil pipe 602 during oil injection, and the bottom of the oil pipe 602 is utilized to enter the through hole 4 and the oil hole 5 for use, so that the internal lubricating effect is improved;

an anti-leakage structure 7 is arranged on one side of the inside of the oil hole 5, the anti-leakage structure 7 comprises an oil sealing ball 701, a screw groove 702, balls 703 and a convex ring 704, the oil sealing ball 701 is arranged on one side of the outside of the oil hole 5, the convex ring 704 is arranged on one side of the inside of the oil hole 5, the screw groove 702 is arranged at the bottom end of the convex ring 704, the convex ring 704 is screwed into the screw groove 702 by utilizing bottom threads, the balls 703 are arranged on two sides of the surface of the convex ring 704, and the convex ring 704 and the screw groove 702 are in threaded connection;

when the structure is used, oil leakage can occur on one side of the oil hole 5, a screw groove 702 is formed in one side of the inside of the oil hole 5, a convex ring 704 is inserted into the screw groove 702 by utilizing bottom threads, balls 703 are arranged on two sides of the surface of the convex ring 704, the convex ring is not influenced when the high-speed gear shaft 3 rotates, meanwhile, an oil sealing ball 701 is added on the other side of the oil hole 5, one side of oil is blocked by utilizing the height of the convex ring 704, and the other side of the oil sealing ball 701 is used for sealing.

Working principle: when the labyrinth type oil seal is used, firstly, the labyrinth type oil seal body 1 is taken to a required position for use, oiling operation is carried out through the oil filling port 603, the oil pipe 602 in the oil filling port 603 adopts a serpentine design, the length of the oil pipe 602 is increased, more oil can be stored in the oil pipe 602 during oiling, and the bottom of the oil pipe 602 is utilized to enter the through hole 4 and the inside of the oil hole 5 for use, so that the internal lubricating effect is improved;

secondly, a screw groove 702 is formed in one side of the oil hole 5, a convex ring 704 is inserted into the screw groove 702 by utilizing bottom threads, balls 703 are arranged on two sides of the surface of the convex ring 704, the oil leakage is likely to occur when the high-speed gear shaft 3 rotates, meanwhile, an oil sealing ball 701 is added on the other side of the oil hole 5, the height of the convex ring 704 is utilized to block one side of oil, and the other side of the oil sealing ball 701 is utilized to seal the oil;

finally, during assembly, the plug on the outer shell of the labyrinth oil seal body 1 is inserted into the positioning groove 201 to be positioned, the pull block 206 on the groove 205 is pulled downwards while being inserted, the clamping block 204 is recycled to the inside of the expansion groove 202 under the action of the pull block 206, after the plug is completely put into the expansion groove 202, the pull block 206 is loosened, under the action of the expansion spring 203 in the expansion groove 202, the clamping block 204 is reset and clamped into the preset opening of the plug to be fixed, and finally the use work of the integrated leak-free labyrinth oil seal structure of the centrifugal compressor is completed.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an integration no seepage labyrinth oil blanket structure of centrifugal compressor, includes labyrinth oil blanket body (1), high-speed gear axle (3), through-hole (4) and oilhole (5), its characterized in that: a high-speed gear shaft (3) penetrates through the middle position inside the labyrinth type oil seal body (1);

through holes (4) are formed in two ends between the high-speed gear shaft (3) and the labyrinth type oil seal body (1), and oil holes (5) are formed in one side of each through hole (4);

the fixing structure comprises a fixing structure (2) arranged at the top end of one side of the inside of a labyrinth oil seal body (1), wherein the fixing structure (2) comprises a positioning groove (201), a telescopic groove (202), a telescopic spring (203), a clamping block (204), a slot (205) and a pull block (206), the positioning groove (201) is arranged at one side of the surface of the labyrinth oil seal body (1), the telescopic groove (202) is arranged below the inside of the positioning groove (201), the telescopic spring (203) is arranged inside the telescopic groove (202), the clamping block (204) is connected to the top end of the telescopic spring (203), the slot (205) is arranged at one side, close to the positioning groove (201), of the surface of the labyrinth oil seal body (1), and the pull block (206) is arranged on the surface of the slot (205);

the bottom end of the pull block (206) is fixedly connected with the clamping block (204) in the telescopic groove (202), and a welding integrated structure is arranged between the pull block (206) and the clamping block (204);

one end of the clamping block (204) penetrates through and extends to the inside of the positioning groove (201), and the clamping block (204) forms an elastic telescopic structure in the inside of the telescopic groove (202) by utilizing the telescopic spring (203);

during assembly, a plug on the outer shell of the labyrinth oil seal body 1 is inserted into the positioning groove (201) to be positioned, a pull block (206) on the slot (205) is pulled downwards while the plug is inserted, a clamping block (204) is recovered to the inside of the telescopic groove (202) under the action of the pull block (206), after the plug is completely put in, the pull block (206) is loosened, and under the action of a telescopic spring (203) in the telescopic groove (202), the clamping block (204) is reset and clamped into a preset opening of the plug to be fixed;

an anti-seepage structure (7) is arranged on one side of the inside of the oil hole (5), the anti-seepage structure (7) comprises an oil sealing ball (701), a screw groove (702), balls (703) and a convex ring (704), the oil sealing ball (701) is arranged on one side of the outside of the oil hole (5), the convex ring (704) is arranged on one side of the inside of the oil hole (5), and the screw groove (702) is arranged at the bottom end of the convex ring (704);

the convex ring (704) is screwed into the screw groove (702) by utilizing the bottom threads, balls (703) are arranged on two sides of the surface of the convex ring (704), and the convex ring (704) and the screw groove (702) are in threaded connection.

2. The integrated leakage-free labyrinth seal structure of a centrifugal compressor according to claim 1, wherein: the labyrinth oil seal comprises a labyrinth oil seal body (1), and is characterized in that a storage structure (6) is arranged at the middle position inside the labyrinth oil seal body (1), the storage structure (6) comprises an oil plug (601), an oil pipe (602), an oil filling port (603) and a fixed elastic sheet (604), and the oil filling port (603) is arranged at the middle position inside the labyrinth oil seal body (1).

3. The integrated leakage-free labyrinth seal structure of a centrifugal compressor according to claim 2, wherein: an oil pipe (602) is arranged in the oil filling port (603), and the oil pipe (602) is distributed in the oil filling port (603) in an S shape.

4. The integrated leakage-free labyrinth seal structure of a centrifugal compressor according to claim 2, wherein: the length of the oil pipe (602) is longer than the depth of the oil filling port (603), and the caliber of the oil pipe (602) is smaller than the width of the inner wall of the oil filling port (603).

5. The integrated leakage-free labyrinth seal structure of a centrifugal compressor according to claim 2, wherein: the oil seal is characterized in that an oil plug (601) is inserted into the outside of the oil filling port (603), fixed elastic pieces (604) are arranged on two sides of the oil plug (601), buckling grooves matched with the fixed elastic pieces (604) are formed on two sides, close to the fixed elastic pieces (604), of the surface of the labyrinth oil seal body (1), and the buckling grooves on the surface of the fixed elastic pieces (604) and the buckling grooves on the surface of the labyrinth oil seal body (1) form a clamping structure.