CN214660837U

CN214660837U - Oil retaining device of oil-free dry screw compressor

Info

Publication number: CN214660837U
Application number: CN202120333513.XU
Authority: CN
Inventors: 刘永涛
Original assignee: Shaanxi Dingtai Electronic Technology Co ltd
Current assignee: Shaanxi Dingtai Electronic Technology Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-09
Anticipated expiration: 2031-02-05

Abstract

The utility model discloses an oilless dry-type screw compressor keeps off oily device, including baffle and screw rod, the lateral wall of baffle runs through and has seted up logical groove, the screw rod passes through the bearing with logical inslot wall and rotates and be connected, the sealed rotation of circumference lateral wall of screw rod is connected with first sealing ring, first sealing ring and the welding of logical inslot wall, it has the second sealing ring to lead to the welding of inslot wall, second sealing ring bottom veneer has the rubber pad, the rubber pad offsets with the circumference lateral wall of screw rod, inside oil return device and the compression device of being provided with of baffle. Through setting up first sealing ring and second sealing ring, can realize keeping off oil to the dual of screw rod, can effectively increase the effect of keeping off oily device, utilize simultaneously with the rubber pad and the screw rod in close contact with of deformation, can improve the sealed effect of second sealing ring greatly to make screw compressor's the oily effect of keeping off better, the condition that can the significantly reduced oil leak takes place, thereby can greatly increase the utilization ratio of refueling.

Description

Oil retaining device of oil-free dry screw compressor

Technical Field

The utility model relates to a screw compressor technical field especially relates to an oil-free dry-type screw compressor keeps off oily device.

Background

The compressor, it is a driven fluid machinery to promote the low-pressure gas to the high-pressure gas, it is the heart of the refrigerating system, it sucks the refrigerant gas of low-temperature low-pressure from the suction pipe, after driving the piston to compress it through the operation of the electrical machinery, discharge the refrigerant gas of high-temperature high-pressure to the exhaust pipe, provide the power for refrigerating cycle;

the sealing of the screw rod in the oil-free dry type screw compressor in modern life is very important, and the existing oil-free dry type screw compressor often has the phenomenon that the screw rod sealing effect is poor when the oil-free dry type screw compressor runs for a long time, so that oil leakage can be caused, the oil utilization rate can be reduced, even great influence can be caused on the running of the oil-free dry type screw compressor, and therefore an oil blocking device of the oil-free dry type screw compressor needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the poor shortcoming of leakproofness among the prior art, and the oil retaining device of an oilless dry screw compressor who provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an oilless dry-type screw compressor keeps off oily device, includes baffle and screw rod, the lateral wall of baffle runs through and has seted up logical groove, the screw rod passes through the bearing with logical inslot wall and rotates and be connected, the sealed rotation of circumference lateral wall of screw rod is connected with first sealing ring, first sealing ring and logical inslot wall welding, logical inslot wall welding has the second sealing ring, second sealing ring bottom veneer has the rubber pad, the rubber pad offsets with the circumference lateral wall of screw rod, inside oil return device and the compression device of being provided with of baffle.

Preferably, the oil return device comprises an oil return groove formed in the inner wall of the through groove, and the oil return groove is communicated with the side wall of the baffle.

Preferably, a check valve is arranged inside the oil return groove, the conduction state of the check valve arranged inside the oil return groove is from the inside of the oil return groove to the outside of the baffle, and the upper end of the oil return groove is funnel-shaped.

Preferably, the compression device includes the oil return chamber of offering in the baffle lateral wall, the interior bottom in oil return chamber runs through and offers a plurality of oil feed slots that communicate with logical groove, the lateral wall in oil return chamber runs through and offers out the oil groove.

Preferably, a plurality of oil feed grooves and the inside check valve that all is provided with of oil outlet groove, the on-state of the inside check valve that sets up of oil feed groove is from leading to the inslot portion to returning to the oil chamber inside, the on-state of the inside check valve that sets up of oil outlet groove is from returning to the oil chamber inside to the baffle outside.

Preferably, the oil return intracavity wall sealing and sliding connection has the clamp plate, the clamp plate passes through connecting spring with the interior top in oil return chamber to be connected, the bottom welding of clamp plate has the ejector pad, the ejector pad runs through to logical inslot portion, the welding of the circumference lateral wall of screw rod has the lug.

Compared with the prior art, the utility model has the advantages of:

1. in the device, the first sealing ring and the second sealing ring are arranged, so that double oil blocking of the screw can be realized, the effect of the oil blocking device can be effectively improved, and meanwhile, the deformed rubber pad is in close contact with the screw, so that the sealing effect of the second sealing ring can be greatly improved, the oil blocking effect of the screw compressor is better, the oil leakage can be greatly reduced, and the oil utilization rate can be greatly increased;

2. in this device, through setting up back oil pipe and compressor arrangement, can realize the recovery to the oil of second sealing ring department to can avoid the damage of oil, and simultaneously to the recovery of oil can the flow of greatly reduced second sealing ring department oil, thereby can effectively improve the leakproofness that keeps off oily device, make screw compressor keep off oily effect better.

Drawings

Fig. 1 is a schematic structural view of an oil retaining device of an oil-free dry screw compressor according to the present invention;

fig. 2 is a side sectional view of an oil retaining device of an oil-free dry screw compressor according to the present invention;

fig. 3 is an enlarged view of a portion a in fig. 1.

In the figure: the oil return device comprises a baffle 1, a through groove 2, a screw rod 3, a bearing 4, a first sealing ring 5, a second sealing ring 6, a rubber pad 7, an oil return groove 8, an oil return cavity 9, an oil inlet groove 10, an oil outlet groove 11, a pressing plate 12, a connecting spring 13, a push block 14 and a convex block 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, an oil retaining device of an oil-free dry screw compressor comprises a baffle plate 1 and a screw rod 3, wherein a through groove 2 is formed in the side wall of the baffle plate 1 in a penetrating manner, the screw rod 3 is rotatably connected with the inner wall of the through groove 2 through a bearing 4, a first sealing ring 5 is rotatably connected to the circumferential side wall of the screw rod 3 in a sealing manner, the first sealing ring 5 is an air sealing ring, the first sealing ring 5 is welded with the inner wall of the through groove 2, a second sealing ring 6 is welded on the inner wall of the through groove 2, the second sealing ring 6 is an oil sealing ring, a rubber pad 7 is glued at the bottom of the second sealing ring 6, the rubber pad 7 abuts against the circumferential side wall of the screw rod 3, and an oil return device and a compression device are arranged inside the baffle plate 1; the oil return device comprises an oil return groove 8 formed in the inner wall of the through groove 2, and the oil return groove 8 is communicated with the side wall of the baffle plate 1; the inside check valve that is provided with of oil gallery 8, the conduction state of the inside check valve that sets up of oil gallery 8 is from the inside outside to baffle 1 of oil gallery 8, and the upper end of oil gallery 8 is hourglass hopper-shaped, can be convenient for to the recovery of oil.

The compression device comprises an oil return cavity 9 arranged on the side wall of the baffle plate 1, a plurality of oil inlet grooves 10 communicated with the through groove 2 are formed in the inner bottom of the oil return cavity 9 in a penetrating mode, and an oil outlet groove 11 is formed in the side wall of the oil return cavity 9 in a penetrating mode; one-way valves are arranged in the oil inlet grooves 10 and the oil outlet grooves 11, the one-way valves arranged in the oil inlet grooves 10 are in a conduction state from the inside of the through grooves 2 to the inside of the oil return cavity 9, and the one-way valves arranged in the oil outlet grooves 11 are in a conduction state from the inside of the oil return cavity 9 to the outside of the baffle plate 1; go back oil chamber 9 inner wall sealing sliding connection and have clamp plate 12, clamp plate 12 passes through coupling spring 13 with the interior top that returns oil chamber 9 and is connected, the bottom welding of clamp plate 12 has ejector pad 14, ejector pad 14 is "T" type piece, ejector pad 14 runs through to leading to inside groove 2, the circumference lateral wall welding of screw rod 3 has lug 15, lug 15 corresponds with ejector pad 14, through setting up compressor arrangement, at screw rod 3 rotation in-process, can realize leading to the recovery of 2 inside oils in groove, can effectively reduce the damage of oil, also can reduce the flow of oil simultaneously, thereby can play sealed effect.

In the utility model, by arranging the first sealing ring 5 and the second sealing ring 6, the screw rod can be sealed, the oil leakage can be greatly reduced, so that the screw compressor can be protected from oil, the normal use of the screw compressor can be ensured, the second sealing ring 6 is connected with the screw rod 3 through the deformable rubber pad 7, the second sealing ring 6 can be ensured to be tightly abutted against the screw rod 3, the generation of gaps can be reduced, and the sealing effect of the second sealing ring 6 can be greatly improved;

the oil return groove 8 is arranged, so that oil which enters the bottom in the through groove 2 along the gap can flow back, and the screw 3 can be thrown to the inner wall of the through groove 2 in the rotating process, so that the oil is inconvenient to flow and can be attached to the inner part of the through groove 2, unnecessary loss is caused, and the use rate of the oil is greatly reduced;

and in the screw rod 3 rotation in-process, can drive lug 15 and rotate, after lug 15 and ejector pad 14 contact, utilize arc lug 15's difference in height, realize the removal of ejector pad 14, thereby can realize the upper and lower reciprocating motion of ejector pad 14 and clamp plate 12, and at the clamp plate 12 in-process of upwards moving, can make the inside pressure increase of oil return chamber 9, thereby can be to leading to groove 2 inside absorption air, thereby can be with leading to groove 2 inside top and the inside oil absorption of oil feed tank 10 back oil chamber 9 inside, finally discharge along oil groove 11, realize the reuse of oil, can reduce oil and the adnexed loss of inner wall at screw rod 3 rotation in-process, also can play the effect of keeping off oil simultaneously, can effectively increase the oily effect of keeping off of oil device, thereby can further increase screw compressor's leakproofness.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an oil-free dry-type screw compressor keeps off oily device, includes baffle (1) and screw rod (3), its characterized in that, the lateral wall of baffle (1) runs through and has seted up logical groove (2), screw rod (3) and logical groove (2) inner wall pass through bearing (4) and rotate and be connected, the sealed rotation of circumference lateral wall of screw rod (3) is connected with first sealing ring (5), first sealing ring (5) and logical groove (2) inner wall welding, logical groove (2) inner wall welding has second sealing ring (6), second sealing ring (6) bottom veneer has rubber pad (7), rubber pad (7) offset with the circumference lateral wall of screw rod (3), baffle (1) inside oil return device and the compression device of being provided with.

2. An oil-free dry screw compressor oil baffle device according to claim 1, characterized in that the oil return device comprises an oil return groove (8) opened on the inner wall of the through groove (2), and the oil return groove (8) is communicated with the side wall of the baffle plate (1).

3. An oil-free dry screw compressor oil baffle device as claimed in claim 2, characterized in that a one-way valve is arranged inside the oil return groove (8), the conduction state of the one-way valve arranged inside the oil return groove (8) is from the inside of the oil return groove (8) to the outside of the baffle plate (1), and the upper end of the oil return groove (8) is funnel-shaped.

4. An oil-free dry screw compressor oil baffle device as claimed in claim 1, wherein the compression device comprises an oil return cavity (9) formed in the side wall of the baffle plate (1), the inner bottom of the oil return cavity (9) is provided with a plurality of oil inlet grooves (10) communicated with the through groove (2) in a penetrating manner, and the side wall of the oil return cavity (9) is provided with an oil outlet groove (11) in a penetrating manner.

5. An oil-free dry type screw compressor oil baffle device according to claim 4, characterized in that a plurality of oil inlet grooves (10) and oil outlet grooves (11) are provided with one-way valves inside, the one-way valves arranged inside the oil inlet grooves (10) are in a conducting state from the inside of the through groove (2) to the inside of the oil return cavity (9), and the one-way valves arranged inside the oil outlet grooves (11) are in a conducting state from the inside of the oil return cavity (9) to the outside of the baffle plate (1).

6. An oil-free dry screw compressor oil baffle device according to claim 5, characterized in that the inner wall of the oil return chamber (9) is connected with a pressure plate (12) in a sealing and sliding manner, the pressure plate (12) is connected with the inner top of the oil return chamber (9) through a connecting spring (13), a push block (14) is welded at the bottom of the pressure plate (12), the push block (14) penetrates into the through groove (2), and a convex block (15) is welded on the circumferential side wall of the screw (3).