CN109779906A - A kind of double-screw compressor transverse bearing composite structure with sealing function - Google Patents
A kind of double-screw compressor transverse bearing composite structure with sealing function Download PDFInfo
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- CN109779906A CN109779906A CN201910194072.7A CN201910194072A CN109779906A CN 109779906 A CN109779906 A CN 109779906A CN 201910194072 A CN201910194072 A CN 201910194072A CN 109779906 A CN109779906 A CN 109779906A
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- Prior art keywords
- bearing
- sliding bearing
- lubricant
- composite structure
- double
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- 238000007789 sealing Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000000314 lubricant Substances 0.000 claims abstract description 39
- 238000005096 rolling process Methods 0.000 claims abstract description 39
- 238000005461 lubrication Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000565 sealant Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Abstract
The double-screw compressor transverse bearing composite structure with sealing function that the invention discloses a kind of, including at least one sliding bearing and at least one rolling bearing being connected on the axis of rotor, the middle position of sliding bearing axial direction is provided with the lubricant supply line for feeding lubricant, bearing bore on the outside of sliding bearing and rolling bearing returns to flow path by lubricant and is connected to the rotor chamber on the outside of rotor, tap hole is offered on the bearing shell of sliding bearing, the lubricant at tap hole is supplied by sealing fluid supply line to the axle envelope of rotor as sealing fluid.The present invention is combined with rolling bearing using sliding bearing and bears radial load together, greatly strengthens its bearing capacity, solves the problems, such as Lack of support when low viscosity lubricant lubrication；Bearing combination simultaneously substantially prolongs the service life of bearing, enhances the reliability of compressor, also having widened compressor can running speed range；In addition, effectively preventing the leakage at axle envelope, compressor performance is improved.
Description
Technical field
The present invention relates to helical-lobe compressor fields, and in particular to a kind of double-screw compressor radial axle with sealing function
Hold composite structure.
Background technique
Currently, the market occupancy volume of helical-lobe compressor has accounted for 80% or more of all positive displacement compressors.Bearing is as spiral shell
The critical component of bar compressor directly affects the reliability of compressor, while the maximum for also becoming current some new technologies is kept in check.
Such as the oil-free Spiral Lobe Refrigeration Compressor that water lubrication screw air compressor, refrigerant lubricate, bearing takes water lubrication and refrigeration respectively
The mode of agent lubrication.Since water and refrigerant are all low viscosity fluid, and the radial force of helical-lobe compressor is often larger, leads to diameter
Bearing capacity to bearing is inadequate, the serious wear of bearing, and the service life is short, under the operating condition for especially needing frequent start-stop compressor.Institute
With wearability becomes the principal element of design bearing, and bearing must use expensive special wear-resistant material.
Transverse bearing in current helical-lobe compressor is mostly rolling bearing, partially uses sliding bearing, without using
The mode that the two combines.In existing high-pressure screw compressor, sliding bearing is generally used, provides lubrication using pump for bearing
Agent, while the axle envelope position of the lubricant canned rotor using the high pressure.So being supplied to the pressure of the lubricant of sliding bearing
It necessarily is greater than the pressure of institute's sealing gas, i.e. the liquid supply pressure pressure at expulsion that is generally greater than compressor.But due to high pressure spiral shell
The pressure at expulsion of bar compressor is very high, very high for requirements such as the lifts of pump, so that pump often breaks down, lubricant is caused to supply
The problem for returning aspect greatly reduces the security reliability of pump and compressor operation.
Summary of the invention
The double-screw compressor transverse bearing composite structure with sealing function that the purpose of the present invention is to provide a kind of, with
Solve in the prior art low viscosity fluid lubricate when bearing because of Lack of support easy to wear and high-pressure screw compressor cunning
The high problem of dynamic bearing lubricant supply pressure, the present invention is combined by using sliding bearing with rolling bearing bears radial direction together
Load greatly strengthens its bearing capacity, solves the problems, such as Lack of support when low viscosity lubricant lubrication.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of double-screw compressor transverse bearing composite structure with sealing function, including being connected on the axis of rotor
At least one sliding bearing and at least one rolling bearing, the middle position of sliding bearing axial direction are provided with for feeding
The lubricant supply line of lubricant, the bearing bore on the outside of sliding bearing and rolling bearing return to flow path by lubricant and are connected to
Rotor chamber on the outside of rotor offers tap hole on the bearing shell of sliding bearing, and the lubricant at tap hole passes through as sealing fluid
Sealing fluid supply line is supplied to the axle envelope of rotor.
Further, the tap hole is located at region of convergence when sliding bearing operates in circumferential direction, and close to sliding
The minimum clearance side of bearing and axis, tap hole are located axially at sliding bearing middle position.
Further, the rolling bearing or can only to bear the rolling bearing of radial load, or for diameter can be born simultaneously
To the rolling bearing with axial load.
Further, the rolling bearing at least one close to the side of rotor chamber.
Further, the clearance of the rolling bearing is 15-30 μm, and the setting of clearance meets armature spindle in maximum radial
When displacement, the minimum lubrication film thickness of sliding bearing still meets hydrodynamic lubrication condition.
Further, the sliding bearing is radial dynamic pressure sliding bearing.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention combines with rolling bearing by using sliding bearing and bears radial load together, greatly strengthens its carrying
Ability solves the problems, such as Lack of support when low viscosity lubricant lubrication；Meanwhile bearing combination ensure that compressor
In shutdown process sliding bearing and bearing bore it is contactless, without abrasion, extend the service life of bearing, enhance compressor
Reliability saves the cost of sliding bearing；Using the sliding bearing friction mechanism different with rolling bearing, when high revolving speed, is main
It is sliding bearing work, mainly rolling bearing works when the slow-speed of revolution, and having widened compressor can running speed range；In addition, sharp
High sealing pressure is provided for rotor axle envelope position with the dynamic pressure effect of sliding bearing, effectively prevents the leakage at axle envelope, simultaneously
Eliminate the supply pump of lubricant, can simplified system structure, solve the sliding bearing lubricating agent supply pressure of high-pressure screw compressor
The high problem of power improves compressor performance and reliability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment 1 of transverse bearing composite structure of the invention；
Fig. 2 is that tap hole opens up position view on plain bearing bush in embodiment 1；
Fig. 3 is 2 structural schematic diagram of embodiment of transverse bearing composite structure of the invention；
Fig. 4 is 3 structural schematic diagram of embodiment of transverse bearing composite structure of the invention；
In figure: 1- rotor；2- rotor chamber；3- axle envelope；4- rolling bearing；5- sliding bearing；6- bearing bore；7- lubricant supplies
To flow path；8- lubricant returns to flow path；9- sealant supply line.
Specific embodiment
Present invention is further described in detail below:
A kind of transverse bearing composite structure of the double-screw compressor with sealing function, including at least one radial dynamic pressure
Sliding bearing 5 and at least one rolling bearing 4 offer tap hole on the bearing shell of sliding bearing 5, and tap hole leads to rotor axle envelope
At 3 positions, and lubricant is fed by the lubricant supply line 7 that the middle position of 5 axial direction of sliding bearing is arranged, sliding
The bearing bore 6 in 4 outside of dynamic bearing 5 and rolling bearing returns to flow path 8 by lubricant and is connected to rotor chamber 2, the outflow on bearing shell
Hole is located at region of convergence when sliding bearing 5 operates in circumferential direction, and close to the minimum clearance side of sliding bearing and axis, outflow
Hole is located axially at 5 middle position of sliding bearing, finally determines position, radial dynamic pressure according to required sealed pressure
The material of sliding bearing 5 is common material, rather than anti abrasive expensive special material, when lubricant medium (such as water) has corrosion
Property when, only need to spray corrosion-resistant finishes, and the coating need to be with the good compatibility of lubricant medium oil, wherein common material is for example
Carbon steel, expensive material such as PEEK；Erosion shield such as ceramic filler coating；Rolling bearing 4 can be that can only bear radial load
The rolling bearing of lotus, can also be can bear the rolling bearing of radial and axial load simultaneously, and rolling bearing 4 at least one lean on
Nearly rotor chamber side, rolling bearing 4 have larger clearance, and the setting of the clearance need to meet armature spindle in maximum radial displacement, institute
The minimum lubrication film thickness for stating sliding bearing 5 is smaller and still meet hydrodynamic lubrication condition, to guarantee that it is larger that sliding bearing has
Bearing capacity and have good lubricating status.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
Embodiment 1
By taking male rotor discharge end bearings structure as an example, as shown in Figure 1, the transverse bearing composite structure includes that 1 radial direction is dynamic
Press sliding bearing 5 and 1 rolling bearing 4.Tap hole is offered on the bearing shell of the middle position of 5 axial direction of sliding bearing,
Lubricant herein can be led at 3 position of axle envelope by sealant supply line 9, as sealant to provide high sealing pressure
Power flows out hole site as shown in Fig. 2, the region of convergence of sliding bearing 5 duration of runs gap need to be provided with, according to required sealed pressure
It is final to determine position；In addition, the material of sliding bearing 5 is common material, rather than anti abrasive expensive special material, when lubrication is situated between
When matter (such as water) has corrosivity, corrosion-resistant finishes only need to be sprayed, and the coating there need to be good compatibility with lubricant medium.
Rolling bearing 4 can be the rolling bearing that can only bear radial load, can also be the rolling that can bear radial and axial load simultaneously
Bearing, positioned at the side close to rotor chamber 2, to improve the rigidity of rotor；In addition, rolling bearing 4 has larger clearance, (clearance is
15-30 μm), the setting of the clearance need to meet armature spindle in maximum radial displacement, the minimum lubrication film thickness of bush(ing) bearing 5
It spends smaller and still meets hydrodynamic lubrication condition, to guarantee that sliding bearing has biggish bearing capacity and with good lubrication shape
State.
Lubricant is fed from the middle position of 5 axial direction of sliding bearing via lubricant supply line 7, flows through sliding
The gap of bearing 5 is flowed to both ends, is finally returned to flow path 8 via lubricant and is flowed into rotor chamber 2.5 axial direction of sliding bearing
Tap hole is offered on the bearing shell of middle position, high pressure lubricant herein leads to axle envelope 3 by sealant supply line 9
Place is set, since lubricant pressure herein is higher than the gas pressure of rotor exhaust end, lubricant can be flowed via gap to both ends,
One end flows into rotor chamber 2, and the other end flows to rolling bearing 4 and lubricates rolling bearing 4, finally imports lubricant and returns to the stream of flow path 8
Enter rotor chamber 2.
Embodiment 2
As shown in figure 3, embodiment 2 is the difference from embodiment 1 is that the quantity of sliding bearing 5 is more in bearing combined structure
A (2 are shown in figure) to increase sliding bearing bearing capacity, and increases corresponding lubricant supply line 7 and lubricant return
Flow path 8.
Embodiment 3
As shown in figure 4, embodiment 3 is the difference from example 2 is that the side on armature spindle far from rotor chamber increases
One rolling bearing 4, i.e., the quantity of rolling bearing 4 is 2 in bearing combined structure, to avoid when sliding bearing 5 is excessive, is turned
The length of sub- axis is too long to cause axis to deform due to insufficient rigidity, so that the wall surface of sliding bearing 5 and bearing bore 6 touches mill.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (6)
1. a kind of double-screw compressor transverse bearing composite structure with sealing function, which is characterized in that turn including being connected to
At least one sliding bearing (5) and at least one rolling bearing (4) on the axis of sub (1), in sliding bearing (5) axial direction
Between be provided with lubricant supply line (7) for feeding lubricant at position, on the outside of sliding bearing (5) and rolling bearing (4)
Bearing bore (6) by lubricant return flow path (8) be connected to the rotor chamber (2) on the outside of rotor (1), the axis of sliding bearing (5)
Tap hole is offered on watt, the lubricant at tap hole is supplied by sealing fluid supply line (9) to rotor as sealing fluid
At axle envelope (3).
2. a kind of double-screw compressor transverse bearing composite structure with sealing function according to claim 1, special
Sign is that the tap hole is located at region of convergence when sliding bearing (5) operating in circumferential direction, and close to sliding bearing and axis
Minimum clearance side, tap hole is located axially at sliding bearing (5) middle position.
3. a kind of double-screw compressor transverse bearing composite structure with sealing function according to claim 1, special
Sign is, the rolling bearing (4) or for that can only bear the rolling bearing of radial load, or radial and axial for that can bear simultaneously
The rolling bearing of load.
4. a kind of double-screw compressor transverse bearing composite structure with sealing function according to claim 1, special
Sign is, the rolling bearing (4) at least one close to rotor chamber (2) side.
5. a kind of double-screw compressor transverse bearing composite structure with sealing function according to claim 1, special
Sign is that the clearance of the rolling bearing (4) is 15-30 μm, and the setting of clearance meets armature spindle in maximum radial displacement,
The minimum lubrication film thickness of sliding bearing (5) still meets hydrodynamic lubrication condition.
6. a kind of double-screw compressor transverse bearing composite structure with sealing function according to claim 1, special
Sign is that the sliding bearing (5) is radial dynamic pressure sliding bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194072.7A CN109779906B (en) | 2019-03-14 | 2019-03-14 | Radial bearing combination structure of double-screw compressor with sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194072.7A CN109779906B (en) | 2019-03-14 | 2019-03-14 | Radial bearing combination structure of double-screw compressor with sealing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109779906A true CN109779906A (en) | 2019-05-21 |
| CN109779906B CN109779906B (en) | 2020-08-18 |
Family
ID=66488028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910194072.7A Active CN109779906B (en) | 2019-03-14 | 2019-03-14 | Radial bearing combination structure of double-screw compressor with sealing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109779906B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024045008A1 (en) * | 2022-08-31 | 2024-03-07 | 上海泛华紧固系统有限公司 | Pipe thread machining assembly and method for assembling machining assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57102595A (en) * | 1980-12-15 | 1982-06-25 | Hitachi Ltd | Oil supplier screw compressor |
| JPS57135292A (en) * | 1981-02-12 | 1982-08-20 | Ebara Corp | Screw compressor |
| CN101586619A (en) * | 2009-06-26 | 2009-11-25 | 西安交通大学 | Sliding-rolling composite bearing device |
| CN103939472A (en) * | 2014-03-27 | 2014-07-23 | 西安交通大学 | Sliding bearing of double-screw compressor |
| RU2559411C2 (en) * | 2013-12-26 | 2015-08-10 | Общество с ограниченной ответственностью "Научно-производственное предприятие ВИКОМ-М" | Screw oil-filled compressor unit (versions), and lubrication system of bearings of screw oil-filled compressor unit |
| US20160369801A1 (en) * | 2015-06-16 | 2016-12-22 | Man Diesel & Turbo Se | Screw Machine And Method For Operating The Same |
-
2019
- 2019-03-14 CN CN201910194072.7A patent/CN109779906B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57102595A (en) * | 1980-12-15 | 1982-06-25 | Hitachi Ltd | Oil supplier screw compressor |
| JPS57135292A (en) * | 1981-02-12 | 1982-08-20 | Ebara Corp | Screw compressor |
| CN101586619A (en) * | 2009-06-26 | 2009-11-25 | 西安交通大学 | Sliding-rolling composite bearing device |
| RU2559411C2 (en) * | 2013-12-26 | 2015-08-10 | Общество с ограниченной ответственностью "Научно-производственное предприятие ВИКОМ-М" | Screw oil-filled compressor unit (versions), and lubrication system of bearings of screw oil-filled compressor unit |
| CN103939472A (en) * | 2014-03-27 | 2014-07-23 | 西安交通大学 | Sliding bearing of double-screw compressor |
| US20160369801A1 (en) * | 2015-06-16 | 2016-12-22 | Man Diesel & Turbo Se | Screw Machine And Method For Operating The Same |
Non-Patent Citations (1)
| Title |
|---|
| 蔡宏等: "工艺用无油螺杆压缩机的结构与设计", 《流体机械》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024045008A1 (en) * | 2022-08-31 | 2024-03-07 | 上海泛华紧固系统有限公司 | Pipe thread machining assembly and method for assembling machining assembly |
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| Publication number | Publication date |
|---|---|
| CN109779906B (en) | 2020-08-18 |
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Effective date of registration: 20240125 Address after: No. 69 Jinye Road, High tech Zone, Xi'an City, Shaanxi Province, China, No. 3, Zone A, 710076 Patentee after: Xi'an Sixing Power Engineering Co.,Ltd. Country or region after: China Address before: 710049 No. 28 West Xianning Road, Shaanxi, Xi'an Patentee before: XI'AN JIAOTONG University Country or region before: China |