Piston sealing assembly for reciprocating type oil-free labyrinth seal compressor

Abstract

The piston sealing assembly for the reciprocating type oil-free labyrinth seal compressor comprises an air cylinder, a piston is arranged in the air cylinder, a rotating groove is formed in the outer side wall of the piston, a rotating mechanism is arranged in the rotating groove, and a piston is arranged in the rotating mechanism. And the rotating mechanism comprises a rotating cylinder, two push rods, two extension springs, two extrusion inclined blocks, two pushing springs, two stop blocks and two limiting inclined blocks, a plurality of fixing grooves are formed in the outer side wall of the rotating cylinder and the outer side wall of the piston, and a plurality of piston rings and supporting rings are fixed into the fixing grooves correspondingly. According to the piston sealing assembly for the reciprocating type oil-free labyrinth seal compressor, the multiple piston rings and the multiple supporting rings are arranged, cavity labyrinth seal is formed between the multiple piston rings and between the multiple supporting rings, in this way, non-contact seal is formed, mutual abrasion and cylinder rubbing are avoided, and the piston sealing assembly can adapt to long-period operation of the compressor; and faults which cannot be repaired in a long period are eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to piston sealing technical field, concretely is a kind of piston sealing assembly for reciprocating type oil-free labyrinth seal compressor. BACKGROUND

[0002] The piston sealing assembly of compressor has the effect of preventing high-pressure gas in the cylinder of compressor from leaking along the direction of piston rod during the operation of compressor.

[0003] Through retrieval, the existing patent (publication number: CN209083494U) discloses a compressor cylinder piston sealing ring, which comprises an inner ring and an outer ring, the inner ring is a PTFE sealing ring, the outer ring is an aluminum alloy ring or a titanium alloy ring, the outer wall of the inner ring is embeddedly connected with the inner wall of the outer ring to form a sealing ring; a compressor cylinder piston assembly with the aforementioned sealing ring is also provided, which comprises a piston rod, a flow resistance ring and a sealing ring sleeved on the piston rod, the flow resistance ring comprises a flow resistance inner ring and a flow resistance outer ring, the flow resistance inner ring is a PTFE sealing ring, the flow resistance outer ring is an aluminum alloy ring or a titanium alloy ring, the outer wall of the flow resistance inner ring is embeddedly connected with the inner wall of the flow resistance outer ring to form a flow resistance ring. The compressor cylinder piston sealing ring is arranged in a structure combining a PTFE sealing ring and an aluminum alloy ring or a titanium alloy ring, which can reduce the plastic deformation of the sealing ring under long-term continuous load, avoid leakage of the filler in the cylinder as much as possible, and improve safety performance.

[0004] It improves the sealing performance and service life of the piston of compressor cylinder, but it has the following deficiencies: it is a contact type sealing, which can cause mutual abrasion and cylinder friction, and the cylinder of existing large compressor is horizontal, which can cause the bottom of support ring on the piston to bear pressure all the time, and be easily damaged. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a piston sealing assembly for reciprocating type oil-free labyrinth seal compressor, which solves the problems proposed in the above background art.

[0006] To achieve the above object, the utility model realizes the following technical scheme: a piston sealing assembly for reciprocating type oil-free labyrinth seal compressor, comprising a cylinder, the inside of the cylinder is provided with a piston, the outer side wall of the piston is provided with a rotating groove, the inside of the rotating groove is provided with a rotating mechanism, the rotating mechanism comprises a rotating cylinder, two push rods, two extension springs, two extrusion inclined blocks, two push springs, two stop blocks and two limiting inclined blocks, the outer side wall of the rotating cylinder and the outer side wall of the piston are both provided with a plurality of fixed grooves, and a plurality of piston rings and support rings are respectively fixed in the plurality of fixed grooves.

[0007] Preferably, the inner side wall of the rotating drum and the inner side wall of the rotating groove are rotationally connected, a rotating ratchet groove is formed on the left side of the rotating drum, and a limiting ratchet groove is formed on the inner side of the left side of the rotating drum.

[0008] Preferably, two movable holes are formed on the inner left side of the rotating groove, the tension spring is fixed in the inner side of the movable hole, and the other end of the tension spring is fixedly connected with the left end of the extrusion inclined block.

[0009] Preferably, the left side of the extrusion inclined block is fixedly connected with the right end of the push rod, the left end of the push rod penetrates through the piston, and the stop block is fixedly connected with the inner side wall of the cylinder.

[0010] Preferably, two receiving holes are formed on the inner side of the movable hole on the inner left side of the rotating groove, the push spring is fixed in the inner side of the receiving hole, and the other end of the push spring is fixedly connected with the left side of the limiting inclined block.

[0011] Preferably, the inclined surfaces between the limiting inclined block and the extrusion inclined block and the inclined surfaces between the limiting ratchet groove and the rotating ratchet groove are opposite, and the limiting ratchet groove and the rotating ratchet groove are offset by half a ratchet.

[0012] Beneficial effects

[0013] The utility model provides a piston sealing assembly for reciprocating oil-free labyrinth seal compressor, has the following beneficial effects compared with prior art:

[0014] 1、the piston sealing assembly for reciprocating oil-free labyrinth seal compressor, through setting up multiple piston rings and multiple support rings, the cavity labyrinth seal is formed between multiple piston rings and multiple support rings, so that the non-contact type seal is formed to avoid mutual abrasion and cylinder, can adapt to the long -term operation of compressor, eliminates the long -term unrepaired failure.

[0015] 2、the piston sealing assembly for reciprocating oil-free labyrinth seal compressor, through setting up rotating mechanism, piston reciprocating motion, push rod moves left, stop block extrusion push rod, push rod takes extrusion inclined block and moves, extrusion inclined block extrusion rotating ratchet groove, so that the rotating drum rotates, the rotating drum takes support ring and rotates half ratchet angle, adjust the position of support ring, prevent the bottom of support ring from supporting all the time, when piston moves right, extrusion inclined block is taken back to the original place by stretch spring, push spring pushes limiting inclined block, limiting inclined block pushes limiting ratchet groove, makes the rotating drum rotate half ratchet angle again, then the elastic force of push spring limits the rotation of rotating drum, can make support ring rotate all the time, adjust the support position. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1A structure schematic view of the utility model;

[0017] Figure 2 A structure schematic view of the utility model;

[0018] Figure 3 A structure schematic view of the utility model;

[0019] Figure 4 A structure schematic view of the utility model Figure 3 A structure schematic view of the utility model;

[0020] Figure 5 A structure schematic view of the utility model;

[0021] In the figure: 1, cylinder; 2, piston; 3, rotating mechanism; 4, piston ring; 5, support ring; 6, stop block; 7, rotating groove; 8, limit inclined block; 9, movable hole; 10, extrusion inclined block; 11, push spring; 12, storage hole; 13, stretching spring; 14, push rod; 15, rotating ratchet groove; 16, limit ratchet groove; 17, rotating drum; 18, fixed groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a kind of piston sealing assembly for reciprocating oil-free labyrinth seal compressor, piston sealing assembly for reciprocating oil-free labyrinth seal compressor, including cylinder 1, the inside of cylinder 1 is equipped with piston 2, the outside wall of piston 2 is equipped with rotating groove 7, the inside of rotating groove 7 is equipped with rotating mechanism 3, rotating mechanism 3 includes rotating drum 17, two push rods 14, two stretching springs 13, two extrusion inclined blocks 10, two push springs 11, two stop blocks 6 and two limit inclined blocks 8, the outside wall of rotating drum 17 and the outside wall of piston 2 are equipped with multiple fixed grooves 18, multiple fixed grooves 18 are respectively fixed with multiple piston rings 4 and support rings 5 in the inside, multiple piston rings 4 and multiple support rings 5 form cavity labyrinth seal between, such formation non-contact seal avoids mutual abrasion and cylinder, can adapt to compressor long period operation, eliminates long period failure that cannot be repaired.

[0024] Further, the inner side wall of the rotating drum 17 is rotatably connected with the inner side wall of the rotating groove 7, a rotating ratchet groove 15 is formed on the left side of the rotating drum 17, a limiting ratchet groove 16 is formed on the inner side of the left side of the rotating drum 17, two movable holes 9 are formed on the inner left side of the rotating groove 7, a stretching spring 13 is fixed inside the movable hole 9, the other end of the stretching spring 13 is fixedly connected with the left end of the extrusion inclined block 10, the left side of the extrusion inclined block 10 is fixedly connected with the right end of the push rod 14, the left end of the push rod 14 penetrates through the piston 2, the stop block 6 is fixedly connected with the inner side wall of the cylinder 1, two receiving holes 12 are formed on the inner left side of the rotating groove 7 and located inside the movable hole 9, a pushing spring 11 is fixed inside the receiving hole 12, the other end of the pushing spring 11 is fixedly connected with the left side of the limiting inclined block 8, the inclined surfaces between the limiting inclined block 8 and the extrusion inclined block 10 and between the limiting ratchet groove 16 and the rotating ratchet groove 15 are opposite, and the limiting ratchet groove 16 and the rotating ratchet groove 15 are staggered by half a ratchet, the piston 2 reciprocates, the push rod 14 moves leftward, the stop block 6 extrudes the push rod 14, the push rod 14 moves with the extrusion inclined block 10, the extrusion inclined block 10 extrudes the rotating ratchet groove 15, so that the rotating drum 17 rotates, the rotating drum 17 rotates with the supporting ring 5 by half a ratchet angle, the position of the supporting ring 5 is adjusted, and the bottom of the supporting ring 5 is prevented from being always supported.

[0025] In operation, the cavities are formed between the plurality of piston rings 4 and between the plurality of supporting rings 5, so that a non-contact type sealing is formed to avoid mutual abrasion and friction, the compressor can be adapted for long-period operation, and the long-period unrepairable failure is eliminated, the piston 2 reciprocates, the push rod 14 moves leftward, the stop block 6 extrudes the push rod 14, the push rod 14 moves with the extrusion inclined block 10, the extrusion inclined block 10 extrudes the rotating ratchet groove 15, so that the rotating drum 17 rotates, the rotating drum 17 rotates with the supporting ring 5 by half a ratchet angle, the position of the supporting ring 5 is adjusted, and the bottom of the supporting ring 5 is prevented from being always supported, when the piston 2 moves rightward, the extrusion inclined block 10 is brought back to the original position by the stretching spring 13, the pushing spring 11 pushes the limiting inclined block 8, the limiting inclined block 8 pushes the limiting ratchet groove 16, so that the rotating drum 17 rotates by half a ratchet angle again, then the elastic force of the pushing spring 11 limits the rotation of the rotating drum 17, and the above operation is repeated, so that the supporting ring 5 can always rotate and the supporting position is adjusted.

[0026] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0027] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0028] While embodiments of the present application have been shown and described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the spirit and scope of the present application, which should be limited only by the scope of the appended claims and the equivalents thereof.

Claims

1. A piston seal assembly for a reciprocating oil-free labyrinth-sealed compressor comprising a cylinder (1), characterized in that: The inside of the air cylinder (1) is provided with a piston (2), the outer side wall of the piston (2) is provided with a rotating groove (7), the inside of the rotating groove (7) is provided with a rotating mechanism (3), the rotating mechanism (3) comprises a rotating cylinder (17), two push rods (14), two stretching springs (13), two extrusion inclined blocks (10), two push springs (11), two stop blocks (6) and two limiting inclined blocks (8), the outer side wall of the rotating cylinder (17) and the outer side wall of the piston (2) are provided with a plurality of fixed grooves (18), and a plurality of piston rings (4) and support rings (5) are fixed in the plurality of fixed grooves (18).

2. A piston seal assembly for a reciprocating oil-free labyrinth-seal compressor according to claim 1, characterized in that: The inner side wall of the rotating cylinder (17) and the inner side wall of the rotating groove (7) are rotationally connected, a rotating ratchet groove (15) is formed in the left side of the rotating cylinder (17), and a limiting ratchet groove (16) is formed in the left side of the rotating cylinder (17) and located in the inside of the rotating ratchet groove (15).

3. A piston seal assembly for a reciprocating oil-free labyrinth-seal compressor as set forth in claim 2, characterized in that: Two movable holes (9) are formed in the inside left side of the rotating groove (7), the stretching spring (13) is fixed in the inside of the movable hole (9), and the other end of the stretching spring (13) is fixedly connected with the left end of the extrusion inclined block (10).

4. A piston seal assembly for a reciprocating oil-free labyrinth-seal compressor as set forth in claim 3, characterized in that: The left side of the extrusion inclined block (10) and the right end of the push rod (14) are fixedly connected, the left end of the push rod (14) penetrates the piston (2), and the stop block (6) and the inner side wall of the air cylinder (1) are fixedly connected.

5. A piston seal assembly for a reciprocating oil-free labyrinth-seal compressor as set forth in claim 4, characterized in that: Two receiving holes (12) are formed in the inside left side of the rotating groove (7) and located in the inside of the movable hole (9), the push spring (11) is fixed in the inside of the receiving hole (12), and the other end of the push spring (11) is fixedly connected with the left side of the limiting inclined block (8).

6. A piston seal assembly for a reciprocating oil-free labyrinth-seal compressor according to claim 5, characterized in that: The inclined surfaces between the limiting inclined block (8) and the extrusion inclined block (10) and the inclined surfaces between the limiting ratchet groove (16) and the rotating ratchet groove (15) are opposite, and the limiting ratchet groove (16) and the rotating ratchet groove (15) are offset by half a ratchet.

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