CN207687004U - Bearing installs fixed structure and compressor - Google Patents
Bearing installs fixed structure and compressor Download PDFInfo
- Publication number
- CN207687004U CN207687004U CN201721519027.7U CN201721519027U CN207687004U CN 207687004 U CN207687004 U CN 207687004U CN 201721519027 U CN201721519027 U CN 201721519027U CN 207687004 U CN207687004 U CN 207687004U
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- China
- Prior art keywords
- section
- axially position
- bearing
- fixed structure
- position part
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Abstract
The utility model discloses a kind of bearing installation fixed structure and compressor.The bearing installs fixed structure, including rotary shaft, bearing and the axially position part for carrying out axially position to bearing, bearing and axially position part are arranged on the rotary shaft, axially position part is integrally formed, axially position part includes being fixedly connected with section and axially position section, it is fixedly connected with section to be fixedly connected with rotary shaft, the end of axially position section has positioning end face and and bearing fit.Bearing installation fixed structure according to the present utility model can ensure the consistency of parts on shaft reference for assembling, reduce the assembly difficulty of parts on shaft.
Description
Technical field
The utility model is related to compression device technical fields, and fixed structure and pressure are installed in particular to a kind of bearing
Contracting machine.
Background technology
Centrifugal compressor is the machinery that pressure difference is generated by rotating speed, high to the stability requirement of rotating speed.In rotary shaft
Parts be required for reliably being positioned and being locked, just can guarantee the build-up tolerance with axis.Under normal conditions, one is realized
The positioning and locking of part need two parts, by taking bearing as an example, need to be positioned by locating ring and locking nut cooperation,
Wherein locating ring ensures build-up tolerance requirement with axis generally use transition cooperation or interference fit type.It is fixed when part is more
Part needed for position and locking is incremented by, and may result in rotary shaft axial length and becomes larger, and axis rigidity reduces, and critical speed reduces, fortune
Rotation shaft vibration increases during row, shortens axis and the service life with the part of axis cooperation, and such mounting means
Probably due between needing the several parts for positioning and locking, there are stringent spatial distributions to require to lead to axially mounted space
Not enough.
Bearing and labyrinth seal class part, are all the parts coordinated with high-speed rotating shaft, and generally axially mounting distance is very
Closely, the spacing between bearing and labyrinth seal class part cannot be satisfied is assembled with two positioning, locking part respectively.Due to
There is a problem of difficult to install, in the prior art, the form of one Long locating ring of generally use and a locking nut meets this
The positioning and locking of two parts require.But likewise, although this structure design meets assembly demand, but due to needing to process
Go out individual screw-threaded coupling mating area, also result in that rotary shaft axial length is bigger than normal, reduces the rigidity and critical speed of axis.
The rotating speed of high-speed rotating shaft commonly reaches up to ten thousand turns, is needed with parts such as bearing, the labyrinth seals of rotary shaft cooperation
There is the build-up tolerances requirement such as very high concentricity, verticality with axis, not so it is easy to appear wear problems.It is used in these parts
When respective positioning, locking component assembly, since reference for assembling is inconsistent, need very high mounting technology that could will add up
Rigging error controls in claimed range, causes assembly difficult.
Utility model content
A kind of bearing installation fixed structure and compressor are provided in the utility model embodiment, can ensure that parts on shaft fills
Consistency with benchmark reduces the assembly difficulty of parts on shaft.
To achieve the above object, the utility model embodiment provides a kind of bearing installation fixed structure, including rotary shaft, axis
The axially position part of axially position is held and is carried out to the bearing, the bearing and the axially position part are set in the rotation
In shaft, the axially position part is integrally formed, and the axially position part includes being fixedly connected with section and axially position section, described solid
Determine linkage section to be fixedly connected with the rotary shaft, the end of the axially position section has positioning end face and with the bearing matches
It closes.
Preferably, the section that is fixedly connected of the axially position part includes internal thread, and/or, the axially position section packet
Include unthreaded hole section.
Preferably, the axially position part is hollow Step Shaft, the section that is fixedly connected is located at major diameter section, the axis
It is located at path section to positioning section.
Preferably, the peripheral side of the major diameter section forms circumferential seal face.
Preferably, the Step Shaft includes multiple steps, at least two diameters are more than the Step Shaft of most path section diameter
Peripheral side is formed with the circumferential seal face.
Preferably, the intermediate linkage section between the major diameter section and the path section is conical section；Or, the major diameter section
It is directly connected to the path section.
Preferably, projection of the circumferential seal face on the central axis of the axially position part connects with the fixation
It is least partially overlapped to connect projection of the section on the central axis of the axially position part.
Preferably, the peripheral side for being fixedly connected with section forms circumferential seal face.
Preferably, the positioning end face backstop of the axially position part is on the end face of the bearing.
Preferably, when axially position part is hollow Step Shaft, and the peripheral side of the major diameter section forms circumferential seal
When face, the bearing installation fixed structure further includes sealing element, and the sealing element is set in the major diameter section of the axially position part
Outside, it and seals and coordinates with the circumferential seal face.
Preferably, mistake between the inner peripheral surface and the peripheral surface of the rotary shaft of the axially position section of the axially position part
Cross cooperation or interference fit.
It is according to the present utility model in another aspect, provide a kind of compressor, including bearing installs fixed structure, the bearing
It is that above-mentioned bearing installs fixed structure to install fixed structure.
Using the technical solution of the utility model, axially position part is integrally formed, and axially position part includes being fixedly connected with section
There is positioning end face with the end of axially position section, axially position section.The axially position part includes connection structure and positioning simultaneously
Structure can be achieved at the same time the fixation of itself and the positioning to other parts so that carry out axis to other parts in the prior art
Needing the mode for positioning and locking two parts to be changed into positioning only needs an axially position part can be realized, therefore can subtract
Few number of parts, improves quality control, while reducing rotary shaft axial length, raising rotary shaft rigidity, stability and critical turn
Speed.Since axially position part is structure as a whole and includes connection structure and location structure, can be determined by the axial direction of one
Position part is that unified reference for assembling is fixed in the installation of other parts, reduces assembly difficulty, while improving assembly precision.
Description of the drawings
Fig. 1 is the structural schematic diagram of the axially position part of the bearing installation fixed structure of the utility model first embodiment；
Fig. 2 is the schematic diagram of the bearing installation fixed structure of the utility model first embodiment；
Fig. 3 is the schematic diagram of the bearing installation fixed structure of the utility model second embodiment.
Reference sign：1, it is fixedly connected with section；2, axially position section；3, internal thread；4, circumferential seal face；5, centre connects
Connect section；6, bearing；7, rotary shaft；8, sealing element.
Specific implementation mode
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as to this practicality
Novel restriction.
In conjunction with referring to shown in Fig. 1 to Fig. 3, first embodiment according to the present utility model, bearing installs fixed structure, including
Rotary shaft 7, bearing 6 and the axially position part that axially position is carried out to the bearing 6, which is characterized in that the bearing 6 and described
Axially position part is set in the rotary shaft 7, and the axially position part is integrally formed, and the axially position part includes fixing
Linkage section 1 and axially position section 2, the section 1 that is fixedly connected are fixedly connected with the rotary shaft 7, the end of the axially position section 2
Portion has positioning end face and coordinates with the bearing 6.
The axially position part includes simultaneously connection structure and location structure, be can be achieved at the same time from rotary shaft 7
Installation is fixed and the positioning to other parts so that carries out axially position needs to other parts in the prior art and positions and lock
The mode of two parts, which is changed into, only needs an axially position part can be realized, therefore can reduce number of parts, improves quality
Control, while reducing rotary shaft axial length, improve rotary shaft rigidity, stability and critical speed.Since axially position part is
Integral structure and include connection structure and location structure, therefore can be by installation that the axially position part of one is other parts
Fixed unified reference for assembling, reduces assembly difficulty, while improving assembly precision.
In addition, it is desirable to specified otherwise, since axially position part is to be integrally formed, axially position part and rotary shaft 7 into
When row installation cooperation, axially position part is whole directly to carry out coaxial cooperation and installation with rotary shaft 7, and such structure is relative to existing
Have for the case where separate structure is positioned and locked respectively in technology, can in the process be generated not to avoid in two component lockings
Regular offset also eliminates the coaxiality error for deviating bring in the prior art, that is to say, that the setting of axially position part is integral
Molding can not only reduce part, but also also ensure the concentricity of axially position part and rotary shaft 7, considerably reduce rotation
Fluctuation, is effectively improved integrally-built stability.
Preferably, the section 1 that is fixedly connected of axially position part includes internal thread 3, and/or, axially position section 2 includes unthreaded hole
Section.In the present embodiment, the first end inner circumferential side of axially position part is threaded hole, and the threaded area of threaded hole is machined with spiral shell
Line, axially position part realize being fixedly connected between rotary shaft 7 by the screw thread.The second end inner circumferential side of axially position part is
Unthreaded hole, axially position part can be axial fixed to ensure by realizing transition or interference fit between the unthreaded hole and rotary shaft 7
Concentricity between position part and rotary shaft 7.The second end end face of axially position part is formed with positioning end face, can pass through the positioning
End face forms end face cooperation with the part to be positioned in rotary shaft 7, to form axially position to the part to be positioned,
Positioning end face can more efficiently ensure that axially position part treats the axially position precision of locating element.
Preferably, axially position part is hollow Step Shaft, is fixedly connected with section 1 and is located at major diameter section, axially position section 2 is located at
Path section.Due to being fixedly connected with section 1 for realizing being fixedly connected between axially position part and rotary shaft 7, axially position section 2 is used
The axially position of locating element is treated in realization, therefore section 1 will be fixedly connected with and be arranged in major diameter section, axially position section 2 is arranged
In path section, the fixed connection structure between axially position part and rotary shaft 7 can be effectively ensured, improve axially position part and rotation
Structural strength at the cooperation position of shaft 7 is subject to simultaneously because the stress of axially position section mostlys come from axial direction
Radial direction active force is smaller, so that axially position section 2 is located at path section, can not only ensure that axially position section 2 is treated
The axially position precision of locating element avoids adversely affecting the axial positioning structure intensity of axially position section 2, Er Qieke
To reduce the material consumption of axially position section 2, material is saved, reduces the cost of axially position part.
The inner peripheral surface of axially position section 2 is typically cylindrical surface, is gap-matched with one end external cylindrical surface in rotary shaft 7
The either assembly method of interference fit, is assembled using hot cover process, for ensureing the same of axially position part and rotary shaft 7
Axis degree, the positioning end face of axially position section 2 is generally the plane of the central axis perpendicular to axially position section 2, to more just
The axially position of locating element is treated in realization.The peripheral surface of axially position part is cylindrical surface, commonly used in the inner circle with bearing
The inner cylinder face of cylinder or sealing element 8 coordinates, and is used instead of axis.
Preferably, the peripheral side for being fixedly connected with section 1 forms circumferential seal face.And in the present embodiment, the periphery of major diameter section
Side forms circumferential seal face 4.Since the diameter of major diameter section is more than the diameter of path section, it is formed in the peripheral side of major diameter section
Circumferential seal face 4 has it is possible to prevente effectively from path section causes to interfere to sealing element 8 and the sealing fit structure in circumferential seal face 4
Effect ensures the sealing fiting effect of sealing element 8 and circumferential seal face 4.Simultaneously as major diameter section is relatively large in diameter so that fixed to connect
The wall thickness for connecing section 1 is larger, even if in the periphery of major diameter section processing circumferential seal face 4, it will not be strong to being fixedly connected with the structure of section 1
Degree causes larger adverse effect.It additionally needs, it is emphasized that since axially position part is to be integrally formed, the particularity of structure is big
The fluctuation that circumferential seal face 4 is generated because concentricity is bad when width reduces the rotation of axially position part, thus greatly reduces axis
The possibility to rub to the circumferential seal face 4 of locating piece with sealing broach.
In conjunction with shown in Figure 2, first embodiment according to the present utility model, Step Shaft is second order step, including one
Major diameter section and a path section, wherein path section carry out axially position for treating locating element, and major diameter section is for realizing axial direction
Being connected and fixed between locating piece and rotary shaft 7, while being formed in the peripheral side of major diameter section and being sealed for being formed with sealing element 8
The circumferential seal face 4 of structure can effectively improve the sealing effect of rotation axle construction.
In conjunction with shown in Figure 3, second embodiment according to the present utility model, Step Shaft includes multiple steps, at least two
The Step Shaft peripheral side that a diameter is more than most path section diameter is formed with circumferential seal face 4.In the present embodiment, Step Shaft three
Stage rank, including a major diameter section, a central diameter section and a path section, the wherein path section of diameter minimum are used for to be positioned
Part carries out axially position, circumferential seal face 4 is each formed in the peripheral side of major diameter section and central diameter section, so as to be used for simultaneously
The axially position of multiple parts and coordinate with the sealing of axis, this structure is particularly suitable in short axial distance rotating class parts more
Between assembly, can solve the problems, such as that assembly is difficult, and assembly precision can be improved.
Preferably, the intermediate linkage section 5 between major diameter section and path section is conical section；Or, major diameter section and path section are direct
Connection.
Preferably, projection of the circumferential seal face 4 on the central axis of axially position part is axially being determined with section 1 is fixedly connected with
Projection on the central axis of position part is least partially overlapped.Thus, which just can make full use of axially position part passes through inner circumferential
It achieves a fixed connection between side and rotary shaft 7, the design feature of sealing cooperation is realized by peripheral side so that axially position part
Sealing fit portion and interconnecting piece are respectively positioned on same section.
The bearing of the utility model installs fixed structure, can coordinate simultaneously with axis for multiple in limited axial length
Part (such as bearing, labyrinth seal etc.) assembly positioning, and due to carrying out assembly positioning using the same part, assemble
Unifying datum substantially reduces accumulative rigging error, by limiting axially position part compared to the assembly positioning with multiple parts
Geometric tolerance, easier can realize multiple high assembly precisions requirements with axis mating parts.
Preferably, bearing installation fixed structure further includes rotary shaft 7, and bearing 6 and axially position part are set in rotary shaft 7
On, the section 1 that is fixedly connected of axially position part is fixedly connected with rotary shaft 7, and the positioning end face backstop of axially position part is in bearing 6
On end face.
Preferably, when axially position part is hollow Step Shaft, and the peripheral side of major diameter section forms circumferential seal face 4,
It further includes sealing element 8 that bearing, which installs fixed structure, and sealing element 8 is set in outside the major diameter section of axially position part, and and circumferential seal
The sealing cooperation of face 4.Since the sealing fit portion and interconnecting piece of axially position part respectively realize its function institute on axially position part
The position that need to be arranged is different, therefore can be fixedly connected with the outer of section by forming interconnecting piece in the inner circumferential side for being fixedly connected with section
Side forms the mode of sealing fit portion, the function of the two is integrated on same segment structure so that be fixedly connected with the knot of section
Structure obtains more sufficiently effective utilization so that axially position part be fixedly connected and sealing is respectively positioned on same segment structure,
Without being separately positioned in an axial direction on different shaft parts, therefore the axial direction that can shorten between axially position part and rotary shaft 7 is matched
Close length so that axially position part is equal by locking screw and circumferential seal face while having both axially position and locking function
Design can not shorten inside the location structure of axial length, not will increase the axial length of rotary shaft 7 in this way, be conducive to improve
The rotational stabilization of rotary shaft 7.The sealing element 8 is, for example, comb structure.
Preferably, between the inner peripheral surface and the peripheral surface of rotary shaft 7 of the axially position section 2 of axially position part transition cooperation or
Person is interference fitted.
Embodiment according to the present utility model, compressor include bearing installation fixed structure, which installs fixed structure
Fixed structure is installed for above-mentioned bearing.
Certainly, it is above preferred embodiments of the present invention.It should be pointed out that for the ordinary skill of the art
For personnel, under the premise of not departing from the utility model basic principle, several improvements and modifications can also be made, these improvement
It is also considered as the scope of protection of the utility model with retouching.
Claims (12)
1. a kind of bearing installs fixed structure, including rotary shaft (7), bearing (6) and axially position is carried out to the bearing (6)
Axially position part, which is characterized in that the bearing (6) and the axially position part are set in the rotary shaft (7), described
Axially position part is integrally formed, and the axially position part includes being fixedly connected with section (1) and axially position section (2), and the fixation is even
Section (1) is connect to be fixedly connected with the rotary shaft (7), the end of the axially position section (2) have positioning end face and with the axis
Hold (6) cooperation.
2. bearing according to claim 1 installs fixed structure, which is characterized in that the axially position part is fixedly connected
Section (1) includes internal thread (3), and/or, the axially position section (2) includes unthreaded hole section.
3. bearing according to claim 1 installs fixed structure, which is characterized in that the axially position part is hollow platform
Rank axis, the section (1) that is fixedly connected are located at major diameter section, and the axially position section (2) is located at path section.
4. bearing according to claim 3 installs fixed structure, which is characterized in that the peripheral side of the major diameter section forms week
To sealing surface (4).
5. bearing according to claim 4 installs fixed structure, which is characterized in that the Step Shaft includes multiple steps,
The Step Shaft peripheral side that at least two diameters are more than most path section diameter is formed with the circumferential seal face (4).
6. bearing according to claim 3 installs fixed structure, which is characterized in that the major diameter section and the path section it
Between intermediate linkage section (5) be conical section；Or, the major diameter section is directly connected to the path section.
7. bearing according to claim 4 installs fixed structure, which is characterized in that the circumferential seal face (4) is described
Projection on the central axis of axially position part is with the section (1) that is fixedly connected on the central axis of the axially position part
It projects least partially overlapped.
8. bearing according to claim 1 installs fixed structure, which is characterized in that the periphery for being fixedly connected with section (1)
Side forms circumferential seal face (4).
9. bearing according to claim 1 installs fixed structure, which is characterized in that the positioning end face of the axially position part
Backstop is on the end face of the bearing (6).
10. bearing according to claim 3 installs fixed structure, which is characterized in that when axially position part is hollow platform
Rank axis, and when peripheral side formation circumferential seal face (4) of the major diameter section, the bearing installation fixed structure further includes sealing element
(8), the sealing element (8) is set in outside the major diameter section of the axially position part, and matches with the circumferential seal face (4) sealing
It closes.
11. bearing according to claim 9 installs fixed structure, which is characterized in that the axial direction of the axially position part is fixed
Transition cooperation or interference fit between the inner peripheral surface and the peripheral surface of the rotary shaft (7) of position section (2).
12. a kind of compressor, including bearing install fixed structure, which is characterized in that the bearing installation fixed structure is right
It is required that the bearing described in any one of 1 to 11 installs fixed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721519027.7U CN207687004U (en) | 2017-11-13 | 2017-11-13 | Bearing installs fixed structure and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721519027.7U CN207687004U (en) | 2017-11-13 | 2017-11-13 | Bearing installs fixed structure and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207687004U true CN207687004U (en) | 2018-08-03 |
Family
ID=62988577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721519027.7U Withdrawn - After Issue CN207687004U (en) | 2017-11-13 | 2017-11-13 | Bearing installs fixed structure and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207687004U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725408A (en) * | 2017-11-13 | 2018-02-23 | 珠海格力电器股份有限公司 | Bearing installs fixed structure and compressor |
-
2017
- 2017-11-13 CN CN201721519027.7U patent/CN207687004U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725408A (en) * | 2017-11-13 | 2018-02-23 | 珠海格力电器股份有限公司 | Bearing installs fixed structure and compressor |
| CN107725408B (en) * | 2017-11-13 | 2023-10-10 | 珠海格力电器股份有限公司 | Bearing mounting and fixing structure and compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180803 Effective date of abandoning: 20231010 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180803 Effective date of abandoning: 20231010 |