CN208934876U - A kind of compression assembly and compressor - Google Patents
A kind of compression assembly and compressor Download PDFInfo
- Publication number
- CN208934876U CN208934876U CN201821737047.6U CN201821737047U CN208934876U CN 208934876 U CN208934876 U CN 208934876U CN 201821737047 U CN201821737047 U CN 201821737047U CN 208934876 U CN208934876 U CN 208934876U
- Authority
- CN
- China
- Prior art keywords
- piston
- tooth
- cylinder
- sealing
- compression assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007906 compression Methods 0.000 title claims abstract description 27
- 230000006835 compression Effects 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 75
- 238000005461 lubrication Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000010725 compressor oil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Compressor (AREA)
Abstract
It includes: cylinder (1) that the utility model, which provides a kind of compression assembly and compressor, compression assembly, is had cylinder-bore (11)；Piston (2) can move reciprocatingly in the cylinder-bore (11) to compress to gas；And the radial outer wall of the piston (2) is formed as the structure of multiple sealing teeth (3) continuously to connect, there are gap (12) between the tooth top (31) of sealing tooth (3) and the inner wall of the cylinder-bore (11), be formed as seal chamber (21) between two adjacent sealing teeth (3), so that the gas in the cylinder (1) is able to enter in the gap (12) and the seal chamber (21).The gas in cylinder can be made to be able to enter in gap and seal chamber by the utility model, so that piston is not directly contacted with cylinder-bore inner wall, the reciprocating machine friction of piston and cylinder-bore is changed to the friction between piston and compressed gas, the friction power loss that can reduce compressor improves the COP value of compressor.
Description
Technical field
The utility model belongs to Compressor Technology field, and in particular to a kind of compression assembly and compressor.
Background technique
Existing current freezer compressor mainly has crankcase, crankshaft, piston, connecting rod, piston pin resilient key, motor, suction
Air valve group and gas piping system, oil pipe line system composition.Crankshaft, piston are respectively placed in the axis hole and cylinder-bore of crankcase,
Rotor covers on crankshaft, and stator is fixed on crankcase stator mounting surface, and connecting rod one end is placed on crankshaft crank, another end cap
On piston pin, piston pin is placed in piston pin hole, and elastic positioning pin is used for fixed piston pin and piston.
Motor band dynamic crankshaft rotates, and converts the rotary motion of crankshaft to by connecting rod the reciprocating motion of piston, piston with
Cylinder-bore forms sealed volume and completes air-breathing and compression process, and there are small gap between piston and cylinder, between gap
There are oil films to play sealing and lubrication, the reciprocating friction function in general reciprocating compressor, between piston and cylinder
Consumption accounts for 60-70%, and this structure is high there are friction power loss and lubricating oil easily enters suction and discharge system, influences compressor usability
Can, and metal removal particle easy to form, it causes friction power loss high, influences compressor service life, may cause pressure when serious
Contracting machine is stuck.
Since that there are friction power losses is high, causes compressor COP low for reciprocating compressor in the prior art, and lubricating oil is easy
Into suction and discharge system, compressor service performance is influenced, and there are leakage of compressed gas, the inferior skill of suction and discharge low efficiency for cylinder
Art problem, therefore the utility model researching and designing goes out a kind of compression assembly and compressor.
Utility model content
Therefore, the technical problem to be solved by the present invention is to overcome reciprocating compressor in the prior art to exist to rub
The defect that power consumption is high, causes compressor COP low is wiped, to provide a kind of compression assembly and compressor.
The utility model provides a kind of compression assembly comprising:
Cylinder has cylinder-bore；
Piston can be moved reciprocatingly in the cylinder-bore to compress to gas；And the radial direction of the piston
Outer wall is formed as the structure of multiple sealing teeth continuously to connect, has between the tooth top of the sealing tooth and the inner wall of the cylinder-bore
Have gap, be formed as seal chamber between two adjacent sealing teeth so that the gas in the cylinder be able to enter it is described between
In gap and the seal chamber.
Preferably,
The piston have central axis, and multiple sealing teeth along the direction of the central axis continuously connect with
Arrangement.
Preferably,
The sealing tooth further includes tooth root, and the tooth top has at the first midpoint of the length of the central axial direction,
The tooth root has at the second midpoint of the length of the central axial direction, and the sealing tooth includes passing through first midpoint
It is perpendicular with the central axis of the tooth top center line at second midpoint, the tooth top center line and the piston.
Preferably,
The distance between the first midpoint of tooth top of two adjacent sealing teeth meets 0-5mm.
Preferably,
Along the direction of the tooth top center line, the depth of the seal chamber is 0.1-2mm.
Preferably,
In the section by the central axis of the piston, the cross sectional shape of the sealing tooth is trapezoidal, triangle, arc
Shape or rectangle.
Preferably,
The addendum thickness of the sealing tooth is 0.1-5mm, and the addendum thickness is sealing tooth edge at the tooth top
The length of the central axial direction.
Preferably,
In the section by the central axis of the piston, the sealing tooth and the seal chamber are non-circular slip over
It crosses and is connected.
Preferably,
Defining and being provided with the length section of the sealing tooth on the piston is seal section, and the seal section is along the center
The length of axis direction is less than or equal to the piston along the length of the central axis.
The utility model also provides a kind of compressor comprising preceding described in any item compression assemblies.
A kind of compression assembly and compressor provided by the utility model have the following beneficial effects:
The utility model is formed as the structure of multiple sealing teeth continuously to connect by setting the radial outer wall of piston to,
There is gap between the tooth top of the sealing tooth and the inner wall of the cylinder-bore, be formed as close between two adjacent sealing teeth
Chamber is sealed, enables to the gas in the cylinder to be able to enter in the gap and the seal chamber, so that piston and cylinder-bore
Inner wall is not directly contacted with, and the reciprocating machine friction of piston and cylinder-bore is changed between piston and sealing medium (compressed gas)
Friction, can be greatly lowered the friction power loss of compressor, improve the COP value of compressor；And original make can also be replaced
It with the mode that lubricating oil is lubricated between piston and cylinder inner wall, prevents lubricating oil from entering suction and discharge system, influences to compress
Machine service performance reduces compressor oil drainage rate；And by throttling action, pressure and temperature when gas through gaps in cylinder
Decline, and flow velocity increases, and enters in the seal chamber that two sealing teeth are formed later, so that gas increases suddenly in seal chamber internal volume
Add, form strong whirlpool, kinetic energy is converted into thermal energy, so that the speed of gas reduces, pressure reduction, energy reduction, so that gas is not
It can leak out outside cylinder, prevent leakage of compressed gas, effectively improve suction and discharge efficiency, and gas is every by a gap and empty
Chamber, just by primary throttling and dilatation, further increase gas leakage prevents from acting on air-flow.
Using the piston structure of the utility model, reciprocating motion of the pistons friction power loss can reduce, improve compressor COP；
Improve the sealing effect of piston and cylinder, reduces cylinder holes leakage, improve suction and discharge efficiency；By the oil lubrication side between cylinder and piston
Formula becomes oil-free lubrication, substantially improves compressor oil drainage phenomenon；Compressor friction power loss can reduce 60-70%, can significantly drop
Low energy consumption demand, while using the utility model piston that will reduce the oil extraction of compressor, improve compressor matching effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the compression assembly of the compressor of the utility model；
Fig. 2 is the partial enlargement diagram of part A in Fig. 1；
Fig. 3 is the structural schematic diagram of the first embodiment of the piston in the compression assembly of the utility model；
Fig. 4 is the structural schematic diagram of second of embodiment of the piston in the compression assembly of the utility model；
Fig. 5 is the structural schematic diagram of the third embodiment of the piston in the compression assembly of the utility model；
Fig. 6 is the structural schematic diagram of the 4th kind of embodiment of the piston in the compression assembly of the utility model.
Appended drawing reference indicates in figure are as follows:
1, cylinder；11, cylinder-bore；12, gap；2, piston；21, seal chamber；22, central axis；3, tooth is sealed；31, tooth
Top；32, tooth root.
Specific embodiment
As shown in figures 1 to 6, the utility model provides a kind of compression assembly comprising:
Cylinder 1 has cylinder-bore 11；
Piston 2 can move reciprocatingly in the cylinder-bore 11 to compress to gas；And the piston 2
Radial outer wall is formed as the structure of multiple sealing teeth 3 continuously to connect, the tooth top 31 of the sealing tooth 3 and the cylinder-bore 11
There is gap 12 between inner wall, be formed as seal chamber 21 between two adjacent sealing teeth 3, so that the gas in the cylinder 1
Body is able to enter in the gap 12 and the seal chamber 21.
The utility model is formed as the structure of multiple sealing teeth continuously to connect by setting the radial outer wall of piston to,
There is gap between the tooth top of the sealing tooth and the inner wall of the cylinder-bore, be formed as close between two adjacent sealing teeth
Chamber is sealed, enables to the gas in the cylinder to be able to enter in the gap and the seal chamber, so that piston and cylinder-bore
Inner wall is not directly contacted with, and the reciprocating machine friction of piston and cylinder-bore is changed between piston and sealing medium (compressed gas)
Friction, can be greatly lowered the friction power loss of compressor, improve the COP value of compressor；And original make can also be replaced
It with the mode that lubricating oil is lubricated between piston and cylinder inner wall, prevents lubricating oil from entering suction and discharge system, influences to compress
Machine service performance reduces compressor oil drainage rate；And by throttling action, pressure and temperature when gas through gaps in cylinder
Decline, and flow velocity increases, and enters in the seal chamber that two sealing teeth are formed later, so that gas increases suddenly in seal chamber internal volume
Add, form strong whirlpool, kinetic energy is converted into thermal energy, so that the speed of gas reduces, pressure reduction, energy reduction, so that gas is not
It can leak out outside cylinder, prevent leakage of compressed gas, effectively improve suction and discharge efficiency.
The utility model is arranged successively ring packing teeth by the way that several are arranged in piston border, and one is formed between tooth and tooth
Serial throttle clearance and cavity, sealed medium generate throttle effect when through labyrinth tooth and have the function that Drain Resistance.
It seals tooth and cylinder-bore is non-contact, by contactless sealing means, the reciprocating friction power consumption of piston and cylinder is greatly reduced,
There is oil lubrication mode to become oil-free lubrication between piston and cylinder, while reducing compressor oil drainage amount.Using the utility model
Piston structure, can reduce reciprocating motion of the pistons friction power loss, improve compressor COP；The sealing for improving piston and cylinder is imitated
Fruit reduces cylinder holes leakage, improves suction and discharge efficiency；Oil lubrication mode between cylinder and piston is become into oil-free lubrication, is changed significantly
Kind compressor oil drainage phenomenon；Compressor friction power loss can reduce 60-70%, energy requirements can be greatly lowered, while using this
Utility model piston will reduce the oil extraction of compressor, improve compressor matching effect.
Preferably,
The piston 2 has central axis 22, and multiple sealing teeth 3 are continuous along the direction of the central axis 22
Connect and arranges.This is the preferred arrangement of the sealing tooth on the piston of the utility model, i.e., by it along the central axis of piston
Line direction is arranged and continuously connects, and since piston is to carry out straight reciprocating motion along the direction of central axis, can make in this way
The compressed gas obtained in cylinder is gradually leaked towards piston outside along the direction of the central axis of piston, therefore multiple in
The sealing tooth of heart axis direction setting enables to gas to be entered in gap and seal chamber successively along central axial direction, shape
At the effect of reduction of speed and decompression and whirlpool off-load step by step, so that effectively final prevent gas from leaking to outside cylinder.
Preferably,
The sealing tooth 3 further includes tooth root 32, and the tooth top 31 has the first of the length of the central axial direction
Midpoint, the tooth root 32 have at the second midpoint of the length of the central axial direction, and the sealing tooth 3 includes described in process
22 phase of central axis of the tooth top center line at the first midpoint and second midpoint, the tooth top center line and the piston 2 is hung down
Directly.I.e. tooth top center line is the horizontal direction of the piston in Fig. 3-6, and central axis is that along the vertical direction, this is that this is practical new
Type sealing tooth further preferred structure type, enable to sealing tooth structure relative to central axis direction at by
The gradually arrangement of continuous uniform, so that further the gas in cylinder is uniformly introduced in gap and seal chamber to form air film
For rubbing between piston and cylinder, reduces mechanical friction, replace oil lubrication, and further prevent gas along central axial direction
Piston exterior is leaked out, sealing performance is improved.
Preferably,
The distance between the first midpoint of tooth top 31 of two adjacent sealing teeth 3 meets 0-5mm.This is that this is practical
The further preferred structure type of novel sealing tooth has certain spacing generally more gross leak amount smaller between tooth and tooth,
This is the preferred spacing range between the adjacent teeth of the utility model, can farthest reduce leakage of compressed gas amount, subtract
Gadget friction.
Preferably,
Along the direction of the tooth top center line, the depth of the seal chamber 21 is 0.1-2mm.This is the utility model
The preferred depth range of seal chamber, the depth of seal chamber is more advantageous to more deeply reduces gas leakage, is can be improved in this way to gas
The seal degree of leakage, further decreases leakage rate.
Preferably,
In the section by the central axis 22 of the piston 2, the cross sectional shape of the sealing tooth 3 is trapezoidal, triangle
Shape, arc or rectangle.This is the preferred specific constructive form of the sealing tooth of the utility model, and such as Fig. 3 is trapezoidal section shape
Shape, if the cross sectional shape that Fig. 4 sealing tooth is triangle, such as Fig. 5 sealing tooth are the cross sectional shape of arc, such as Fig. 6 sealing
Tooth is the cross sectional shape of rectangle.
Preferably,
For the tooth top 31 of the sealing tooth 3 with a thickness of 0.1-5mm, the addendum thickness is the sealing tooth 3 in the tooth top
Along the length in 22 direction of central axis at 31.This is the preferred thickness range of the tooth top of the sealing tooth of the utility model,
The thickness is the length of the vertical direction in Fig. 3-6, and tooth top center line is vertical with crankcase cylinders centerline hole, and sealing tooth should use up
Measure thin and with acute angle, tooth tip (i.e. tooth top) thickness is generally 0.1~5mm, and the more sealing effects of the number of teeth are better, in this way can be into one
Step improves the seal degree leaked gas, further decreases leakage rate.
Preferably,
In the section by the central axis 22 of the piston 2, the sealing tooth 3 and the seal chamber 21 are non-
Rounding off is connected.Tooth will be sealed and seal chamber connecting part is set as the structure of non-rounding off, gas is enabled to exist
By generating stronger whirlpool when the position, windage loss is generated, the efficiency that kinetic energy is converted into thermal energy is improved, improves gas drop
The effect that speed, decompression and energy reduce improves seal degree so that gas be further prevented to leak.
Preferably,
Defining and being provided with the length section of the sealing tooth 3 on the piston 2 is seal section, and the seal section is in described
The length in 22 direction of mandrel line is less than or equal to the piston 2 along the length of the central axis.By the piston of setting sealing tooth
Section, which is set as can be improved no more than the total length of piston, guarantees the original structural strength of piston, guarantees that piston is in contact with cylinder
Air film between part guarantees seal degree and structural strength while reducing mechanical friction.
The utility model also provides a kind of compressor (preferably reciprocating compressor) comprising preceding described in any item pressures
Contracting component.The compressor of the utility model enables to the gas in the cylinder to be able to enter the gap and the seal chamber
In, so that piston is not directly contacted with cylinder-bore inner wall, the reciprocating machine friction of piston and cylinder-bore is changed to piston and sealing
Friction between medium (compressed gas), can be greatly lowered the friction power loss of compressor, improve the COP value of compressor；And
And original mode being lubricated between piston and cylinder inner wall using lubricating oil can also be replaced, prevent lubricating oil from entering
Suction and discharge system influences compressor service performance, reduces compressor oil drainage rate；And when gas through gaps in cylinder by
Throttling action, pressure and temperature decline, and flow velocity increases, and enter in the seal chamber that two sealing teeth are formed later, so that gas exists
Seal chamber internal volume increases suddenly, forms strong whirlpool, and kinetic energy is converted into thermal energy, so that the speed of gas reduces, pressure reduction, energy
Amount reduces, so that gas will not leak out outside cylinder, prevents leakage of compressed gas, effectively improves suction and discharge efficiency, and gas is every
As soon as by primary throttling and dilatation, further increase gas leakage prevents from making air-flow by time gap and cavity
With.
The compressor arrangement of the utility model, the sealing tooth 3 including annular, gap 12, sealing segment length, cylinder-bore 11,
Seal chamber wherein is formed between annular sealing tooth 3, sealing medium, the sealing tooth 3 and gas of the annular are filled between seal chamber
The cylinder-bore 11 of cylinder be it is non-contact, declined when air-flow flows through fit clearance by throttling action, pressure and temperature, and flow velocity increases
Add, enter the cavity that two sealing teeth are formed later, gas increases suddenly in cavity internal volume, forms strong whirlpool, kinetic energy is converted into
Thermal energy, as soon as gas is every to pass through time gap and cavity, air-flow is by primary throttling and dilatation.Due to piston 2 and cylinder-bore
It is contactless opposite sliding between 11, therefore does not need oil lubrication and be lubricated.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.The above is only the preferred embodiment of the utility model, it is noted that for the art
For those of ordinary skill, without deviating from the technical principle of the utility model, several improvements and modifications can also be made,
These improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of compression assembly, it is characterised in that: include:
Cylinder (1) has cylinder-bore (11)；
Piston (2) can move reciprocatingly in the cylinder-bore (11) to compress to gas；And the piston (2)
Radial outer wall be formed as the structures of multiple sealing teeth (3) continuously to connect, the tooth top (31) and the gas of sealing tooth (3)
There are gap (12) between the inner wall of cylinder holes (11), be formed as seal chamber (21) between two adjacent sealing teeth (3), so that
Gas in the cylinder (1) is able to enter in the gap (12) and the seal chamber (21).
2. compression assembly according to claim 1, it is characterised in that:
The piston (2) has central axis (22), and multiple sealings tooth (3) are along the direction of the central axis (22)
Continuously connects and arrange.
3. compression assembly according to claim 2, it is characterised in that:
The sealing tooth (3) further includes tooth root (32), and the tooth top (31) has the of the length of the central axial direction
One midpoint, the tooth root (32) have at the second midpoint of the length of the central axial direction, and the sealing tooth (3) includes warp
Cross the tooth top center line at first midpoint and second midpoint, the central axis of the tooth top center line and the piston (2)
Line (22) is perpendicular.
4. compression assembly according to claim 3, it is characterised in that:
The distance between the first midpoint of the tooth top (31) of two adjacent sealings tooth (3) meets 0-5mm.
5. compression assembly according to claim 3, it is characterised in that:
Along the direction of the tooth top center line, the depth of the seal chamber (21) is 0.1-2mm.
6. the compression assembly according to any one of claim 2-5, it is characterised in that:
By the piston (2) central axis (22) section in, it is described sealing tooth (3) cross sectional shape be it is trapezoidal, three
Angular, arc or rectangle.
7. the compression assembly according to any one of claim 2-5, it is characterised in that:
The addendum thickness of sealing tooth (3) is 0.1-5mm, and the addendum thickness is the sealing tooth (3) in the tooth top
(31) along the length in the central axis (22) direction at.
8. the compression assembly according to any one of claim 2-5, it is characterised in that:
In the section by the central axis (22) of the piston (2), the sealing tooth (3) and the seal chamber (21)
It is connected for non-rounding off.
9. the compression assembly according to any one of claim 2-5, it is characterised in that:
Defining and being provided with the length section of sealing tooth (3) on the piston (2) is seal section, and the seal section is in described
The length in mandrel line (22) direction is less than or equal to the piston (2) along the length of the central axis.
10. a kind of compressor, it is characterised in that: including compression assembly of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821737047.6U CN208934876U (en) | 2018-10-25 | 2018-10-25 | A kind of compression assembly and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821737047.6U CN208934876U (en) | 2018-10-25 | 2018-10-25 | A kind of compression assembly and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208934876U true CN208934876U (en) | 2019-06-04 |
Family
ID=66725989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821737047.6U Active CN208934876U (en) | 2018-10-25 | 2018-10-25 | A kind of compression assembly and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208934876U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139416A (en) * | 2018-10-25 | 2019-01-04 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of compression assembly and compressor |
-
2018
- 2018-10-25 CN CN201821737047.6U patent/CN208934876U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139416A (en) * | 2018-10-25 | 2019-01-04 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of compression assembly and compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110131419B (en) | Reciprocating type magnetic liquid combined sealing device | |
| CN2900863Y (en) | Automatic compensating plunger seal device for well drilling pump | |
| CN109281890A (en) | Hydraulic cylinder combined sealing structure and hydraulic cylinder | |
| CN112049939A (en) | Reciprocating compressor packing sealing mechanism | |
| CN215719761U (en) | Compound mechanical sealing structure of centrifugal pump | |
| CN206234080U (en) | Industrial oil-free lubricates labyrinth vertical reciprocating compressor | |
| CN109139416A (en) | A kind of compression assembly and compressor | |
| CN210889435U (en) | Sealing structure between rotating parts of compressor | |
| CN210858818U (en) | Two-way spiral sealing system of steam turbine axle head | |
| CN105927542A (en) | Rotor shaft seal structure for double-screw compressor | |
| KR102276365B1 (en) | Reciprocating fluid compressing apparatus and method | |
| CN219953629U (en) | Hydraulic end of plunger pump, plunger pump and oil and gas field fracturing equipment with plunger pump | |
| KR102453003B1 (en) | Double type oil free reciprocating compressing apparatus and method | |
| CN108412719B (en) | Valve type flow distribution axial convex disc ball plug emulsion pump | |
| CN207349084U (en) | The gland seal device of oil free screw machine | |
| CN113339239B (en) | Piston assembly, compressor and have its electrical apparatus | |
| CN206513525U (en) | A kind of piston packing ring of oilless air compressor | |
| CN201412353Y (en) | Packing seal single stage water ring vacuum pump | |
| CN215409106U (en) | High-speed high-power piston compressor cylinder | |
| CN212959070U (en) | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform | |
| CN201250713Y (en) | Piston and piston ring component for combustion engine | |
| CN102926824B (en) | Gas compressor end sealing structure of turbocharger | |
| CN206682033U (en) | Seal structure of water pump and water pump | |
| CN207715338U (en) | The crankshaft seal structure of reciprocating compressor | |
| CN205744447U (en) | A kind of double-screw compressor rotor shaft seal structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |