CN209340146U - Screw type compressor rotor longitudinal balance structure - Google Patents
Screw type compressor rotor longitudinal balance structure Download PDFInfo
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- CN209340146U CN209340146U CN201920012186.0U CN201920012186U CN209340146U CN 209340146 U CN209340146 U CN 209340146U CN 201920012186 U CN201920012186 U CN 201920012186U CN 209340146 U CN209340146 U CN 209340146U
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- axis body
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- shaped axis
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Abstract
The utility model relates to a kind of screw type compressor rotor longitudinal balance structures, including rotor, rod-shaped axis body, shell；The rotor is set on rod-shaped axis body, and rod axis body end portion is equipped with bearing block；Rotor one end is connected to suction side, has cavity between the other end and bearing block；Sealing element is equipped between bearing block and shell；Position corresponding with rotor has the ventilation device for being connected to rotor two sides on the rod-shaped axis body.Compared with the existing technology, the structure of the utility model patent is simpler, and cost is lower, it is only necessary to a labyrinth seal be arranged on rotor, ventilation device is opened up on rod axis, so that it may reach the balance of compressor drum axial direction pressure.
Description
Technical field
The utility model relates to a kind of screw compressors, are that a kind of screw type compressor rotor is axially flat specifically
Weigh structure, belongs to helical-lobe compressor technical field.
Background technique
When compressor is run, the both ends of rotor need bearing support, meanwhile, the size of the load of bearing determines compression
The service life of machine determines the length of the non-failure operation time of compressor.Meanwhile the increase of bearing load, bearing running hot can be made,
A possibility that increasing bearing failure.
There are two the factors for causing bearing load big, one be compressed machine structure limitation, if the rotor of compressor
There are very big load, including axial load and radial load, these loads just need bearing to go to undertake.Second is compressor
Service condition, the service condition such as compressor is more severe, and for example the pressure ratio of compressor is relatively high, then, bearing is also required to
Bear more loads.
Therefore, existing screw compressor, the dimensional accuracy of the plane bearing of two ends of rotor, intensity, anti-fatigue ability
It all has higher requirements, this has certain influence to the cost of compressor, also has a certain impact simultaneously for reliability.
Summary of the invention
The purpose of this utility model is compressor drum can be made flat in axial pressure at two ends by the optimization in design
Weighing apparatus, it is this because of power caused by pressure imbalance to undertake that there is no need to bearings, and the bearing load of compressor is just lighter, bearing
Quantity can also be reduced, and the reliability of compressor can also greatly improve；Meanwhile axial force balance, also running compressor
Higher pressure ratio is able to bear without the reinforcement on bearing.
The utility model takes following technical scheme:
A kind of screw type compressor rotor longitudinal balance structure, including rotor 1, rod-shaped axis body 3, shell 5；The rotor 1
It is set on rod-shaped axis body 3, rod-shaped 3 end of axis body is equipped with bearing block；1 one end of rotor is connected to suction side, the other end
There is cavity 6 between bearing block 8；Sealing element 7 is equipped between bearing block 8 and shell 5；On the rod-shaped axis body 3 with rotor 1
Corresponding position has the ventilation device 9 for being connected to 1 two sides of rotor.
Further, the end face of the 1 near-space chamber 6 of rotor is equipped with labyrinth seal 2.
Further, the ventilation device 9 includes the air channel being axially arranged along rod-shaped axis body and radial along rod-shaped axis body
The venthole of setting, the air channel are connected to venthole.
Further, the rotor 1 is single-screw rotor, and the screw compressor is single screw compressor.
Further, the both ends of the bearing block 8 are fixed with end cap.
The utility model has the beneficial effects that:
1) the pressure at both sides balance of rotor is ensured；
2) structure by the exhaust end of rotor with labyrinth seal and the member of the sealing inside rotor other end cavity
Part prevents high pressure gas and ambient atmos from leaking to this cavity, forms Double-insurance sealing, high reliablity；
3) structure is simpler, and cost is lower, it is only necessary to process a labyrinth seal on rotor, one is processed on rod axis
A ventilation device, so that it may reach the balance of compressor drum axial direction pressure；
4) bearing load of compressor is light, and without two ends of rotor no setting is required end face bearing, the quantity of bearing is reduced,
Cost reduces, and the reliability of compressor can also greatly improve；
5) compressor is made to be able to bear higher pressure ratio without the reinforcement on bearing in operation.
Detailed description of the invention
Fig. 1 is the perspective view of rotor.
Fig. 2 is the enlarged diagram at the position A in Fig. 1.
Fig. 3 is the sectional view of the utility model screw type compressor rotor longitudinal balance structure.
In figure, 1. rotors, 2. labyrinth seals, 3. rod-shaped axis bodies, 4. air channels, 5. shells, 6. cavitys, 7. sealing members
Part, 8. bearing blocks, 9. ventilation devices.
Specific embodiment
The present invention will be further described in the following with reference to the drawings and specific embodiments.
In general, the performance of the single screw compressor bearing of good design can reach 100,000 hours no replacement is required,
If compressor is calculated for 6000 hours by annual operation, single screw compressor bearing be can be used 17 years.Therefore, how to optimize list
The structure of helical-lobe compressor so that single screw compressor rotor axial dynamic balance with promoted single screw compressor service life and
Non-failure operation time, and extension single screw compressor reach application conditions, the project to be studied of the utility model.
As shown in attached drawing 1~3, the rotor cooling structure of single screw rod type refrigerating air compressor machine, rotor 1 includes in rotor end-face
Labyrinth seal 2, the rotor 1 are lying in the horizontal direction in single screw compressor machine；Rotor is covered on the rod-shaped axis body 3, it is described
There is bearing block at rod-shaped 3 both ends of axis body.Wherein there is the sealing of o type ring in main bearing seat 8 and the external world.Inside main bearing seat 8, close to rod axis
There is axle envelope in the position of body 3, it is ensured that high pressure oil and this region separate.Cavity 6 between rotor 1 and main bearing seat 8 is and arranges
The area of low pressure that atmospheric pressure is not communicated with.And the radial venthole having on rod-shaped axis body 3, horizontal communication hole, make the left side of rotor 1
It is communicated with cavity 6, so that the left and right side pressure balance of rotor 1.And because of the labyrinth structure in rotor 1, so that pressure
High pressure after contracting is other cannot to leak into cavity 6, to reach the balance of 1 axial load of rotor.This will greatly simplify compressor
Endurance structure, thus make compressor bear axial force bearing quantity it is few, improve bearing life, provide compressor
Reliability, while reducing the vibration of compressor.
Related content in above-mentioned technical proposal is explained further as follows:
1. the both ends of single-screw rotor 1, one end is low-pressure end, and pressure is the pressure of inspiration(Pi) of compressor；Other end is one
A cavity 6.Groove/opening of axially and radially ventilating is provided on the position cooperated by rod-shaped axis body 3 and rotor 1, it is ensured that this cavity 6
The pressure of inspiration(Pi) of pressure and compressor balance.Meanwhile in order to prevent high pressure other from compression chamber be leaked to this region, in rotor 1
End external cylindrical surface on have a cricoid labyrinth seal 2, and the other end of cavity 6 also has sealing element 7 to prevent the external world
Gas leakage to this cavity in.
2. the axial two sides of single-screw rotor 1, pressure complete equipilibrium, so that the rotor 1 of single screw compressor is in compressor
During gas, bearing does not need to bear axial load.Compressor can be stable operation, and operate in its run model
It encloses, the load of bearing all very littles.
Compared with the existing technology, the structure of the utility model patent is simpler, and cost is lower, it is only necessary to be arranged on rotor
One labyrinth seal, opens up ventilation device on rod axis, so that it may reach the balance of compressor drum axial direction pressure.
It is the preferred embodiment of the utility model above, those of ordinary skill in the art can also carry out respectively on this basis
Kind of transformation improves, and under the premise of not departing from the utility model total design, these transformation or improves this reality all should belong to
Within the scope of novel be claimed.
Claims (5)
1. a kind of screw type compressor rotor longitudinal balance structure, it is characterised in that:
Including rotor (1), rod-shaped axis body (3), shell (5)；
The rotor (1) is set on rod-shaped axis body (3), and rod-shaped axis body (3) end is equipped with bearing block；
Rotor (1) one end is connected to suction side, has cavity (6) between the other end and bearing block (8)；Bearing block (8)
Sealing element (7) are equipped between shell (5)；
Position corresponding with rotor (1) has the ventilation device (9) for being connected to rotor (1) two sides on the rod-shaped axis body (3).
2. screw type compressor rotor longitudinal balance structure as described in claim 1, it is characterised in that: the rotor (1) is close
The end face of cavity (6) is equipped with labyrinth seal (2).
3. screw type compressor rotor longitudinal balance structure as described in claim 1, it is characterised in that: the ventilation device
It (9) include the air channel being axially arranged along rod-shaped axis body and the venthole being arranged radially along rod-shaped axis body, the air channel and logical
Stomata connection.
4. screw type compressor rotor longitudinal balance structure as described in claim 1, it is characterised in that: the rotor (1) is
Single-screw rotor, the screw compressor are single screw compressor.
5. screw type compressor rotor longitudinal balance structure as described in claim 1, it is characterised in that: the bearing block (8)
Both ends be fixed with end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920012186.0U CN209340146U (en) | 2019-01-04 | 2019-01-04 | Screw type compressor rotor longitudinal balance structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920012186.0U CN209340146U (en) | 2019-01-04 | 2019-01-04 | Screw type compressor rotor longitudinal balance structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209340146U true CN209340146U (en) | 2019-09-03 |
Family
ID=67760864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920012186.0U Active CN209340146U (en) | 2019-01-04 | 2019-01-04 | Screw type compressor rotor longitudinal balance structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209340146U (en) |
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2019
- 2019-01-04 CN CN201920012186.0U patent/CN209340146U/en active Active
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