CN107701445A - A kind of helical-lobe compressor - Google Patents
A kind of helical-lobe compressor Download PDFInfo
- Publication number
- CN107701445A CN107701445A CN201711115141.8A CN201711115141A CN107701445A CN 107701445 A CN107701445 A CN 107701445A CN 201711115141 A CN201711115141 A CN 201711115141A CN 107701445 A CN107701445 A CN 107701445A
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- Prior art keywords
- oil circuit
- oil
- helical
- fuel
- lobe compressor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/021—Control systems for the circulation of the lubricant
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of helical-lobe compressor, it has been internally integrated fuel feeding distribution control device, fuel feeding distribution control device includes pedestal and multiple fuel-flow control components, multiple oil circuits are opened up in pedestal, fuel-flow control component is set on oil circuit, being internally integrated by helical-lobe compressor sets fuel feeding to distribute control device, multiple oil circuits are set in pedestal and the lubricating oil that enter helical-lobe compressor can control effectively for the multiple fuel-flow control components being arranged on each oil circuit and the lubricating oil to entering each position of compressor chamber carries out reasonable distribution, it is reasonable with the helical-lobe compressor fuel feeding of guarantee, fuel-flow control component can adjust each the minimum of oil circuit of control and pass through oil mass, so as to ensure the minimum fuel delivery of the minimum fuel delivery of helical-lobe compressor and each position of compressor chamber.The application of its technical scheme is simple, easy for installation, occupies little space, it is not necessary to frequently regulation operation, realizes and the lubricating oil for entering helical-lobe compressor constantly is carried out into reasonable distribution control by helical-lobe compressor operating condition.
Description
Technical field
The present invention relates to helical-lobe compressor equipment technical field, more particularly to a kind of helical-lobe compressor.
Background technology
Most of screw air compressors are injected compressor, need to continue to spray into compressor drum chamber in its compression process
Lubricating oil.The compressor oil that helical-lobe compressor sprays into primarily enters low-pressure end shaft cover and low pressure end bearing in compressor chamber
Chamber, screw rotor compression chamber, high-pressure side bearing bore.The fueller of general compressor is nonadjustable fixed mode, compressor
Once production is dispatched from the factory, the fuel delivery of compressor can not carry out any adjustment at the scene, and the supply of compressor oil is in exhaust end base of oil injection threaded bolt
Played a crucial role in the operation of compressor.
Working range actually with a helical-lobe compressor can change from 0.7MPa-1.5MPa, and supply gas pressure is different, pressure
The fuel delivery of contracting machine is also different；In the case of supply gas pressure identical, with a compressor under different rotating speeds, it compresses empty amount
Also it is different, while the compressor oil mass consumed also has difference.The fixation fuel delivery device of conventional design can not meet user's need
Ask；On the other hand, due to the influence of the factors such as supply gas pressure, environment temperature, humidity, three positions of compressor chamber fuel feeding are supplied
Should measure also needs to adjust accordingly.If fuel delivery ratio is improper, fuel delivery is excessive, easily causes compressor efficiency reduction；Fuel feeding
Measure very few, it may appear that axle envelope, the phenomenon of bearing abnormal high temperature, compressor high temperature is occurred, also reduce parts service life.
It is for example, as follows in the helical-lobe compressor test to a 20 cubes or so, the fuel feeding situation of its compressor：
When the outlet pressure of compressor is controlled in 0.7MPa, helical-lobe compressor is measured when optimum is run, its is each
The relation of technical parameter and fuel delivery is：
As can be seen here, it is ensured that a qualified compressor can give full play to its performance, helical-lobe compressor under various operating modes
The control of fuel delivery and the reasonable distribution of compressor oil are all necessary, to ensure use process of the compressor in different operating modes
In, the fuel delivery distribution of each part in the fuel delivery and compressor of reasonable adjusting compressor.
The content of the invention
For the above-mentioned problems in the prior art, now provide that a kind of be intended to can be to entering each position of compressor chamber
Lubricating oil carries out reasonable distribution with the rational fuel feeding distribution control device of the helical-lobe compressor fuel feeding ensured.To overcome above-mentioned skill
Art defect.
Concrete technical scheme is as follows：
A kind of helical-lobe compressor, fuel feeding distribution control device is internally integrated, there is A lubricating oil in helical-lobe compressor
Road, B lubricant passage ways, C lubricant passage ways, fuel feeding distribution control device are arranged in pedestal including pedestal, at least three to control
The fuel-flow control component of lubricating oil throughput in each oil circuit, offer in pedestal the first oil circuit, in " second oil circuit of [" font,
In "] " the 3rd oil circuit, the 4th oil circuit, the 5th oil circuit, the 6th oil circuit of font, wherein,
First oil circuit penetrates that pedestal forms main oil inlet as working connection and one end and the other end connects the second oil circuit, and the 3rd
The both ends oil inlet of oil circuit is connected with the both ends oil-out of the second oil circuit respectively, and one end of the 4th oil circuit penetrates pedestal and forms use
To connect one of oil-out of the outlet of the first oil circuit of A lubricant passage ways and the other end the second oil circuit of connection, the 5th loop
One end penetrate pedestal formed to connect the second oil circuit of B lubricant passage ways outlet and the other end connect the second oil circuit another go out
Hydraulic fluid port, the one end in the 6th loop penetrate pedestal and formed to connect the outlet of the 3rd oil circuit of C lubricant passage ways and other end connection the
Three oil circuits；
At least one fuel-flow control component, the second oil circuit and the 3rd oil circuit, are provided with the circulation path of first oil circuit
Four oil circuit joints are provided with a fuel-flow control component, and the second oil circuit and the 3rd oil circuit, the 5th oil circuit joint are provided with one
Individual fuel-flow control component.
Preferably, fuel-flow control component includes thrust spring, controls bolt and the movable valve being arranged on oil circuit, seat
Setting perpendicular with oil circuit and interconnected mounting groove are offered in vivo, are inwardly offered on pedestal and are oppositely arranged with mounting groove
Counterbore, and the inner bottom surface of counterbore offers a screw being connected with mounting groove；
What movable valve can vertically move relative to oil circuit is placed in mounting groove, controls the screw rod end of bolt via screw
Screw in mounting groove and leant with movable valve, and control the screw cap end of bolt to be located in counterbore, the both ends point of thrust spring
Di Jie not the medial surface of movable valve and the bottom surface of the remote control bolt one end of mounting groove.
Preferably, fuel-flow control component also includes a sealing ring, and ring set abuts control spiral shell in movable valve
One end of bolt.
Preferably, movable valve matches with installation groove shape.
Preferably, the first oil communication is in the middle part of the second oil circuit.
Preferably, the 6th oil communication is in the middle part of the 3rd oil circuit.
The beneficial effect of above-mentioned technical proposal is：
Integrally disposed fuel feeding distribution control device, is distributed in the pedestal of control device by fuel feeding and set in helical-lobe compressor
The multiple fuel-flow control components put multiple oil circuits and be arranged on each oil circuit can be carried out the lubricating oil for entering helical-lobe compressor
The effectively lubricating oil at control and each position of machine cavity to entering helical-lobe compressor carries out reasonable distribution, with the helical-lobe compressor of guarantee
Fuel feeding is reasonable, and fuel-flow control component can adjust the minimum by oil mass of each oil circuit of control, so as to ensure helical-lobe compressor
Minimum fuel delivery and each position of compressor chamber minimum fuel delivery, and application is simple, easy for installation, occupies little space, is not required to
Operation is frequently adjusted, realizes and constantly carries out the lubricating oil for entering helical-lobe compressor rationally by helical-lobe compressor operating condition
Distribution control.
Brief description of the drawings
Fig. 1 is the cross-sectional view that fuel feeding distributes control device in helical-lobe compressor of the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, it is real below
Example combination accompanying drawing 1 is applied to be specifically addressed helical-lobe compressor provided by the invention.
It is the cross-sectional view that fuel feeding distributes control device in helical-lobe compressor of the present invention refering to Fig. 1.And it is clear
The architectural feature of the present embodiment is shown, is omitted in figure and part-structure is shown, part-structure is then shown in a manner of perspective or section view,
The direction of arrow shown in figure distributes the flow direction of lubricating oil in control device internal oil passages for fuel feeding, and the present invention's is main
The fuel feeding distribution control device being inside helical-lobe compressor is improved, therefore omits in the accompanying drawings and the normal of helical-lobe compressor is shown
Advise structure and the structure of fuel feeding distribution control device is only shown.
As shown in fig. 1, helical-lobe compressor provided by the invention has been internally integrated fuel feeding distribution control device, screw rod pressure
There is A lubricant passage ways, B lubricant passage ways, C lubricant passage way (not shown)s, fuel feeding distribution control device includes pedestal in contracting machine
1st, at least three it is arranged in pedestal 1 to control the fuel-flow control component of lubricating oil throughput in each oil circuit, is opened up in pedestal 1
There are the first oil circuit 11, the 3rd oil circuit 13, the 4th oil circuit 14, the 5th oil circuit in second oil circuit 12 of " [" font, in "] " font
15th, the 6th oil circuit 16, wherein,
First oil circuit 11 penetrates that pedestal 1 forms main oil inlet 24 as working connection and one end and the other end connects the second oil circuit
12, the both ends oil-out of the both ends oil inlet of the 3rd oil circuit 13 respectively with the second oil circuit 12 is connected, one end of the 4th oil circuit 14
Pedestal 1 is penetrated to be formed to connect wherein the one of the first oil circuit outlet 21 of A lubricant passage ways and the other end the second oil circuit 12 of connection
Individual oil-out, the one end in the 5th loop penetrate pedestal 1 and form to connect the second oil circuit outlet 22 of B lubricant passage ways and the other end
Another oil-out of the second oil circuit 12 is connected, the one end in the 6th loop penetrates pedestal 1 and formed to connect the of C lubricant passage ways
Three oil circuits export 23 and the other end connects the 3rd oil circuit 13；At least one oil mass control is provided with the circulation path of first oil circuit 11
Component processed, the second oil circuit 12 and the 3rd oil circuit 13, the joint of the 4th oil circuit 14 are provided with a fuel-flow control component, the second oil circuit
12 and the 3rd oil circuit 13, the joint of the 5th oil circuit 15 be provided with a fuel-flow control component.
Wherein, the lubricating oil trend of A lubricant passage ways is introduced into shaft cover and low pressure end bearing for the oil into compressor chamber
Chamber enters back into screw rotor working chamber, and the lubricating oil trend of B lubricant passage ways is introduced into high-pressure side axle for the oil into compressor chamber
Hold chamber and enter back into screw rotor working chamber, the lubricating oil trend of C lubricant passage ways is directly entered screw rod for the oil into compressor chamber
Working rotor chamber, it is the common lubricant oil road structure in conventional screw compressor, therefore omits repeat here.
Based on above-mentioned technical proposal, control device is distributed by installing fuel feeding on helical-lobe compressor additional, there is provided maximum oil-feed
Amount and minimum oil inlet quantity, it is ensured that helical-lobe compressor fuel feeding in controlled range, ensures that fuel feeding is safely controllable always.Ensureing oil-feed
After amount, the assignment problem of compressor oil-supplying is considered further that, the compressor oil into A roads is too small to cause axle envelope overheat or low-pressure end axle
Hold abnormal heating；Oil mass into C roads is too small to cause rotor abnormal heating, and the oil mass into B roads is too small to cause high-pressure side
Bearing abnormal heating；In fuel feeding assigning process, a certain road binders amount is excessive will necessarily to cause another way fuel delivery less than normal, institute
With as long as we are controlled per minimum fuel delivery all the way.Therefore it is more that setting in the pedestal 1 of control device is distributed by fuel feeding
Individual oil circuit and the multiple fuel-flow control components being arranged on each oil circuit can carry out the lubricating oil for entering helical-lobe compressor effective
Control and the lubricating oil to entering each position of compressor chamber carries out reasonable distribution, it is reasonable with the helical-lobe compressor fuel feeding of guarantee, and
Fuel-flow control component can adjust the minimum by oil mass of each oil circuit of control, so as to ensure the minimum fuel delivery of helical-lobe compressor
With the minimum fuel delivery at each position of compressor chamber.It is easy for installation and application is simple, occupy little space, it is not necessary to frequently regulation behaviour
Make, realize and the lubricating oil for entering helical-lobe compressor is constantly subjected to reasonable distribution control by helical-lobe compressor operating condition.Profit
Control device is distributed with to helical-lobe compressor fuel feeding, effective distribution to entering each position compressor oil of helical-lobe compressor can be really
Protect compressor under the different operating modes can stable operation, solve common compressor because fuel feeding is unreasonable and abnormal heating is asked
Topic, the stability of helical-lobe compressor is greatly improved, add the service life of helical-lobe compressor.
In a preferred embodiment, fuel-flow control component includes being arranged at oil circuit that (oil circuit here refers to the
One oil circuit 11, the second oil circuit 12, the 3rd oil circuit 13) on movable valve 4, thrust spring 6, control bolt 5, open up in pedestal 1
There are setting perpendicular with oil circuit and interconnected mounting groove 2, inwardly offer on pedestal 1 and sunk with what mounting groove 2 was oppositely arranged
Hole 3, and the inner bottom surface of counterbore 3 offers a screw (not shown) being connected with mounting groove 2, movable valve 4 can phase
Be placed in for what oil circuit vertically moved in mounting groove 2, control bolt 5 screw rod end via screw screw in mounting groove 2 in and with
Movable valve 4 leans, and controls the screw cap end of bolt 5 to be located in counterbore 3, and the both ends of thrust spring 6 abut moving valve respectively
Bottom surface of the medial surface and mounting groove 2 of body 4 away from control bolt 5 one end.
In the above-mentioned technical solutions, by controlling bolt 5 and thrust spring 6 to limit the stroke of movable valve 4, so as to protect
The minimum fuel delivery of helical-lobe compressor and the minimum fuel delivery at each position of compressor chamber are demonstrate,proved.
As further preferred embodiment, fuel-flow control component also includes a sealing ring 7, and sealing ring 7 is set with
One end of control bolt 5 is abutted in movable valve 4 so that oil mass will not be flowed out by the gap between movable valve 4 and mounting groove 2.
Obviously, movable valve 4 is matched with the shape of mounting groove 2.First oil circuit outlet 21 exports with A lubricant passage ways, the second oil circuit
All realized and be connected by oil pipe between 22 and B lubricant passage ways, the 3rd oil circuit outlet 23 and C lubricant passage ways.
As further preferred embodiment, the first oil circuit 11 is communicated in the middle part of the second oil circuit 12 so that the second oil
The oil pump capacity of the both ends oil-out on road 12 more balances.Further, the 6th oil circuit 16 is communicated in the middle part of the 3rd oil circuit 13, makes
Obtain in the oil circuit 16 of inflow the 6th that pressure can be balanced by the oil mass of the both ends oil inlet of the 3rd oil circuit 13, and then go out from the 3rd oil circuit
Mouth 23 is flowed into C lubricant passage ways.Further, the quantity of the fuel-flow control component set on the first oil circuit 11 is one, but its
Quantity is not limited thereto, and can accordingly be changed according to helical-lobe compressor model, the difference of operating mode, while also can be in the second oil
Flow control assembly is set on demand on road 12, the 3rd oil circuit 13.
In addition, in the present embodiment, fuel-flow control component is by three control 5, three, bolt thrusts of movable valve 4, three
Spring 6 and sealing ring 7 form, simple in construction, easy for installation, occupy little space, it is not necessary to frequently regulation operation, can be according to screw rod
The model of compressor, operating condition match different movable valves 4, control bolt 5, thrust spring 6, form different devices.
The present apparatus can be expanded with movable valve 4 into two level or multi-stage screw compressor, can be made to adjust fuel feeding caliber size, effectively controlled
Overall oil mass of the system into compression chamber.Pass through set amount minimum oil volume limits device, it is ensured that the minimum fuel delivery of compressor oil,
The drawbacks of so as to avoid in control operational error from making machine cavity and each lubricant passage way oil starvation in compressor.
In the present embodiment, can be lived by the screw-in amount of adjustment control bolt 5 and the effect of thrust spring 6, accurate adjustment
The travel position of moving valve 4, realizes the accurate adjustment of the fuel delivery of helical-lobe compressor, and is divided in portion each into compressor chamber
The fuel delivery at position.By compressor oil by Machine structural features control fuel delivery, while compressor oil is prorated to compressor
The device at each position of intracavitary, screw compressor system safety, energy-conservation, stable operation can be ensured by the device.
It is worthy of note that the second above-mentioned oil circuit 12 and the 3rd oil circuit 13, the joint of the 4th oil circuit 14 and above-mentioned
Two oil circuits 12 and the 3rd oil circuit 13, the joint of the 5th oil circuit 15 are " two oil-outs of second oil circuit 12 of [" font.
Presently preferred embodiments of the present invention is the foregoing is only, is merely illustrative for the purpose of the present invention, and it is non-limiting
's.Those skilled in the art understands, many changes can be carried out to it in the spirit and scope that the claims in the present invention are limited,
Modification, in addition it is equivalent, but fall within protection scope of the present invention.
Claims (6)
1. a kind of helical-lobe compressor, it is characterised in that fuel feeding distribution control device has been internally integrated, in the helical-lobe compressor
With A lubricant passage ways, B lubricant passage ways, C lubricant passage ways, the fuel feeding distribution control device is set including pedestal (1), at least three
It is placed in the pedestal (1) to control the fuel-flow control component of lubricating oil throughput in each oil circuit, is opened up in the pedestal (1)
Have the first oil circuit (11), in the 3rd oil circuit (13) of second oil circuit (12) of " [" font, in "] " font, the 4th oil circuit (14),
5th oil circuit (15), the 6th oil circuit (16), wherein,
First oil circuit (11) penetrates that the pedestal (1) forms main oil inlet (24) as working connection and one end and the other end connects
Lead to second oil circuit (12), the both ends oil inlet of the 3rd oil circuit (13) is brought out with the two of second oil circuit (12) respectively
Hydraulic fluid port is connected, and one end of the 4th oil circuit (14) penetrates the pedestal (1) and formed to connect the of the A lubricant passage ways
One oil circuit exports one of oil-out of (21) and other end connection second oil circuit (12), the one end in the 5th loop
The pedestal (1) is penetrated to be formed to connect the second oil circuit of B lubricant passage ways outlet (22) and other end connection described the
Another oil-out of two oil circuits (12), the one end in the 6th loop penetrate the pedestal (1) and formed to connect the C profits
3rd oil circuit on lubricating oil road exports (23) and the other end connects the 3rd oil circuit (13)；
At least one fuel-flow control component, second oil circuit are provided with the circulation path of first oil circuit (11)
(12) the 3rd oil circuit (13), the 4th oil circuit (14) joint are provided with a fuel-flow control component, described second
Oil circuit (12) is provided with a fuel-flow control component with the 3rd oil circuit (13), the 5th oil circuit (15) joint.
2. helical-lobe compressor as claimed in claim 1, it is characterised in that the fuel-flow control component include thrust spring (6),
Bolt (5) and the movable valve (4) being arranged on oil circuit are controlled, is offered and the perpendicular setting of oil circuit in the pedestal (1)
And interconnected mounting groove (2), the counterbore being oppositely arranged with the mounting groove (2) is inwardly offered on the pedestal (1)
(3), and the inner bottom surface of the counterbore (3) offers a screw being connected with the mounting groove (2)；
What the movable valve (4) can vertically move relative to oil circuit is placed in the mounting groove (2), the control bolt
(5) screw rod end screws in the mounting groove (2) via the screw and leant with the movable valve (4), and the control
The screw cap end of bolt (5) processed is located in the counterbore (3), and the both ends of the thrust spring (6) abut the movable valve respectively
(4) bottom surface of the medial surface and the mounting groove (2) away from described control bolt (5) one end.
3. helical-lobe compressor as claimed in claim 2, it is characterised in that the fuel-flow control component also includes a sealing ring
(7), and the sealing ring (7) is set in one end that the movable valve (4) abuts the control bolt (5).
4. helical-lobe compressor as claimed in claim 3, it is characterised in that the movable valve (4) and the mounting groove (2) shape
Shape matches.
5. the helical-lobe compressor as described in claim 3 or 4, it is characterised in that first oil circuit (11) is communicated in described
The middle part of two oil circuits (12).
6. helical-lobe compressor as claimed in claim 5, it is characterised in that the 6th oil circuit (16) is communicated in the 3rd oil
The middle part on road (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711115141.8A CN107701445B (en) | 2017-11-13 | 2017-11-13 | A kind of helical-lobe compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711115141.8A CN107701445B (en) | 2017-11-13 | 2017-11-13 | A kind of helical-lobe compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107701445A true CN107701445A (en) | 2018-02-16 |
| CN107701445B CN107701445B (en) | 2019-01-04 |
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ID=61178497
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711115141.8A Active CN107701445B (en) | 2017-11-13 | 2017-11-13 | A kind of helical-lobe compressor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486254A (en) * | 2019-09-18 | 2019-11-22 | 珠海格力电器股份有限公司 | With the oil circuit circuit board and compressor for simplifying oil circuit effect |
| CN110983667A (en) * | 2019-12-31 | 2020-04-10 | 浙江乔治白校服有限公司 | Oil supply device for sewing machine |
| CN116677606A (en) * | 2023-08-03 | 2023-09-01 | 德耐尔节能科技（上海）股份有限公司 | Double-screw two-stage compression interstage self-adaptive oil injection device |
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| CN110983667A (en) * | 2019-12-31 | 2020-04-10 | 浙江乔治白校服有限公司 | Oil supply device for sewing machine |
| CN116677606A (en) * | 2023-08-03 | 2023-09-01 | 德耐尔节能科技（上海）股份有限公司 | Double-screw two-stage compression interstage self-adaptive oil injection device |
| CN116677606B (en) * | 2023-08-03 | 2023-10-20 | 德耐尔节能科技（上海）股份有限公司 | Double-screw two-stage compression self-adaptive oil injection device |
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| CN107701445B (en) | 2019-01-04 |
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Effective date of registration: 20190313 Address after: 337100 B District, Lianhua County Industrial Park, Pingxiang, Jiangxi Patentee after: JIANGXI FENGSHI COMPRESSOR CO.,LTD. Address before: 337100 B District, Lianhua County Industrial Park, Pingxiang, Jiangxi Patentee before: JIANGXI HONGHAILI ENERGY TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20221228 Address after: 337000 area a, Lianhua Industrial Park, Pingxiang City, Jiangxi Province Patentee after: Jiangxi Yingsai Compressor Co.,Ltd. Address before: 337100 B District, Lianhua County Industrial Park, Pingxiang, Jiangxi Patentee before: JIANGXI FENGSHI COMPRESSOR CO.,LTD. |