CN110273717A - Turbomachinery and its mechanical axial displacement limiting device - Google Patents
Turbomachinery and its mechanical axial displacement limiting device Download PDFInfo
- Publication number
- CN110273717A CN110273717A CN201910660709.7A CN201910660709A CN110273717A CN 110273717 A CN110273717 A CN 110273717A CN 201910660709 A CN201910660709 A CN 201910660709A CN 110273717 A CN110273717 A CN 110273717A
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- Prior art keywords
- oilhole
- bearing block
- slide unit
- axial displacement
- sleeve
- Prior art date
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 86
- 230000000670 limiting effect Effects 0.000 title claims abstract description 37
- 239000000314 lubricant Substances 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 208000002925 dental caries Diseases 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/051—Axial thrust balancing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
Abstract
The invention discloses a kind of turbomachinery and its mechanical axial displacement limiting devices; the device is coaxial with the rotor and is relatively fixed on the bearing block of rotor; it include: shell; enclosure interior forms an accommodating chamber to one side opening of bearing block; the opening of accommodating chamber is fixed on bearing block, and the first oilhole being connected with oil sources is provided in housing sidewall；Sleeve with cavity is sheathed in the accommodating chamber, and the second oilhole is provided on the side wall of bearing block one end, which is connected to bearing block, and sleeve is far from being provided with the third oilhole being connected with the first oilhole on one end side wall of bearing block；Slide unit with cavity, is sheathed in sleeve, close to one end of bearing block and the end face smooth contact of rotor；Multiple 4th oilholes are provided on slide unit side wall, multiple 4th oilholes are arranged in correspondence in the two sides of the second oilhole；When axial displacement occurs or exceeds threshold value, which can trigger turbomachinery and shuts down.
Description
Technical field
The present invention relates to mechanical axial displacement limiting device, which can be applied to steam turbine, compressor and air blower
Etc. in high-speed rotating turbomachinery, belong to a part of unit safety protection system.
Background technique
In turbomachinery operational process, due to the interaction of rotor and fluid, it is (following that axial active force can be generated
Referred to as: " axial force "), this axial force will increase the load of thrust bearing, it is also possible to rotor can be made to fluid matasomatism
The opposite direction play of power, leads to axial displacement occur, causes the service life of equipment bearing, obturator etc. to detract and even directly damages
It is bad, also the relatively small impeller of dynamic and static gaps and partition can be caused greatly to destroy.In the prior art to solve this problem
Generally use the following two kinds solution:
One kind being to provide corresponding balance thrust to offset axial force, to avoid the generation of axial displacement；Specifically,
It is that most thrust is offset using a differential thrust balance device, keeps a certain amount of residual axial force, reduction pushes away
The load of power bearing, to reduce the generation of axial displacement；As the Chinese patent application file of publication number CN1749573A discloses
A kind of differential thrust balance device for rotary fluid machine, the device flow through the flow of fluid channel by adjusting,
Carry out the pressure difference before and after adjustment disk, so that according to axial force adjustment thrust, the program can reduce to a certain extent
A possibility that axial displacement occurs, but in application process due to it, there are apparent hysteresis effects, and balancing thrust cannot basis
Axial force at that time is made a response immediately, thus its sensitivity is low, cannot prevent the generation of axial displacement completely.
Another kind is to carry out shutdown processing when axial displacement occurs to equipment, continuing to run process to avoid equipment
In, axial displacement causes to damage to equipment；Its specific working principle is: steam turbine in the process of running, work as axial displacement
Or play it is excessive when, mechanical axial displacement limiting device closes oily (E) by speed of releasing and triggers quick-closing valve and servo valve is quick
It closes and forces unit emergency shutdown.Usually only electronic type axial displacement warning device in turbomachinery at present, and in industry
Field electronic type is alarmed, and there are certain risks for tripgear, and it is excessive once to occur axial displacement, can not only burn thrust axis
It holds, and the relatively small impeller of dynamic and static gaps and partition is caused greatly to destroy.
To sum up, existing technical solution can reduce a possibility that axial displacement occurs to a certain extent, but when axial
After displacement occurs, there is also certain technological deficiencies for shutdown protector, and fundamentally axial displacement cannot be avoided to equipment
Caused by damage.
Summary of the invention
In order to solve the above-mentioned technical problem, the first object of the present invention is: providing a kind of mechanical rotor position protection
Device, when axial displacement occurs or exceeds threshold value, which can trigger turbomachinery and shuts down, to avoid axial displacement to saturating
Put down mechanical damage.
The second object of the present invention is: providing a kind of turbine using above-mentioned mechanical axial displacement limiting device
Tool.
Based on above-mentioned purpose, one aspect of the present invention provides a kind of mechanical axial displacement limiting device, the protection
Device is coaxial with the rotor and is relatively fixed on the bearing block of rotor；
The mechanical axial displacement limiting device includes:
Shell, the enclosure interior form an accommodating chamber to one side opening of bearing block, the open end of the accommodating chamber
It is fixed on the bearing block, is provided with through-hole on the bearing block, which is connected to lubricant passage way；In the housing sidewall
It is provided with and closes the first oilhole that oil circuit is connected with speed；
Sleeve with cavity, the sleeve are set in the accommodating chamber, are provided on the side wall of bearing block one end
Second oilhole, second oilhole are connected to the through-hole of the bearing block, sleeve far from be provided on one end side wall of bearing block with
The third oilhole that first oilhole is connected；
Slide unit with cavity, the slide unit are installed in the cavity of the sleeve, can axially move, and institute
The cavity for stating slide unit is connected with the cavity of the sleeve；Slide unit is close to one end of bearing block and the end face phase of rotor
It supports, so that it can be axially moveable with rotor；Multiple cavitys with slide unit are provided on the slide unit side wall to connect
The 4th logical oilhole, multiple 4th oilholes are arranged in correspondence in the left and right sides of second oilhole, to work as the sliding part
When part is more than threshold value with the axial displacement of rotor movement, at least one the 4th oilhole is connected with second oilhole；
The speed is closed the oil in oil circuit and is entered in the cavity of slide unit via the first oilhole, third oilhole, when rotor
When axial displacement is less than the spacing of the second oilhole and the 4th oilhole, do not connect between second oilhole and the 4th oilhole
Logical, oil pressure remains unchanged in slide unit；When the axial displacement of rotor is greater than the spacing of the second oilhole and the 4th oilhole,
Second oilhole is connected to the 4th oilhole, causes the oil in slide unit via on the 4th oilhole, the second oilhole and bearing block
Through-hole release to lubricant passage way, thus speed close oil circuit in oil pressure reduce, trigger shutdown action.
Preferably, the one end of slide unit far from bearing block is by an elastomeric element and the sleeve far from bearing block
One end offsets；After rotor return, the elastomeric element drives the slide unit return.
Preferably, the shell is provided with one for adjusting the adjusting spiral shell of sleeve axial position far from one end of bearing block
Mother, one end of the adjusting nut are set to outside the shell, after the other end runs through the shell, with the sleeve far from bearing block
Threaded one end connection；The relative axial position of the sleeve Yu the slide unit is adjusted by the adjusting nut, to adjust
The positive negative sense threshold value of whole axial displacement.
Preferably, being provided with a cushion block between the adjusting nut and shell, the adjusting nut sequentially passes through described
After cushion block and shell, it is connected to the one end of the sleeve far from bearing block.
Preferably, being provided with width dimensions in the corresponding inner walls of first oilhole greater than the first oilhole radial ruler
Very little first annular slot, so that third oilhole be made to be connected always with first oilhole；
Alternatively, the longitudinal section of first oilhole is in T-shape from the inside to the outside, the inside aperture of first oilhole is greater than described
The aperture of third oilhole, so that third oilhole is connected with first oilhole always when the axial position of sleeve changes
It is logical.
Preferably, the second annular groove is provided in the inner walls of the open end of the accommodating chamber, second annular groove
It is connected with second oilhole and bearing block, so that the second oilhole be made to be connected always with the bearing block.
Preferably, the circumferential position between the shell, sleeve and the slide unit is relatively fixed, thus when described
When the axial displacement of slide unit is more than threshold value, at least partly it is overlapped between the 4th oilhole and the second oilhole.
Preferably, being provided with the first pin hole on the side wall of the shell, one and are provided on the side wall of the sleeve
The second coaxial pin hole of one pin hole, is provided with a waist hole axially extended on the slide unit side wall, first pin hole,
Running through between second pin hole and the waist hole has an anti-rotation pin.
Preferably, the sleeve and the shell are integrally formed.
Another aspect of the present invention provides a kind of turbomachinery, including as above described in any item mechanical axial positions
Protective device is moved, one end of the mechanical axial displacement limiting device is fixed by bolts on the bearing block of rotor, the other end
Oil circuit connection is closed with the speed of turbomachinery, when the axial displacement of the rotor in turbomachinery exceeds threshold value, the mechanical axial direction
Displacement protecting device triggers the speed and closes the fluid supplying passage that oil circuit is closed between fluid source and turbomachinery, to trigger shutdown
Movement.
Compared with prior art, the invention has the benefit that
The present invention uses mechanical axial displacement limiting device, compared to electronic type alarm tripgear, in structure and property
Stability with higher on energy；
When axial displacement occurs or exceeds threshold value, which can trigger turbomachinery by mechanical structure and shut down, axial
Displacement threshold value is controllable, reacts more accurate, can effectively avoid damage of the axial displacement to turbomachinery.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the restriction to the application for explaining the application.
Fig. 1 is the structural schematic diagram of mechanical rotor position protection system in the embodiment of the present invention；
Fig. 2 is the partial profile structure of mechanical axial displacement limiting device in the embodiment of the present invention.
100, turbomachinery；200, oil sources；300, fluid source；
1, rotor；2, bearing block；3, mechanical axial displacement limiting device；4, speed closes oil circuit；6, fluid supplying passage；7,
Throttle part；
31, shell；32, sleeve；33, slide unit；34, the first bolt；35, anti-down to ship and resell on another market；36, adjusting nut；37, solid
Rationed marketing；38, cushion block；39, the second bolt；
311, the first oilhole；312, first annular slot；313, the second annular groove；314, sealing ring；
321, the second oilhole；322, third oilhole；
331, the 4th oilhole；332, elastomeric element；333, waist hole；
41, the first valve；42, the first valve controls oil cylinder；43, the second valve；44, third valve；
51, flow control valve；52, governor；53, oil motor；54, flow control valve controls oil cylinder.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In addition, in the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ",
" width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two
It is a or more than two, unless otherwise restricted clearly.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
The invention will be further described with embodiment with reference to the accompanying drawing:
As shown in Figure 1, a kind of mechanical rotor position protection system, the system include mechanical axial displacement limiting device
3 and speed close oil circuit 4；
The mechanical axial displacement limiting device 3, turn that be opposite with rotor 1 and being coaxially fixable to turbomachinery 100
On the bearing block 2 of son 1, it is provided with through-hole on the bearing block 2, which is connected to lubricant passage way；The mechanical axial displacement
Protective device includes closing the first oilhole 311 and can connect according to the through-hole of change in location situation and bearing block 2 that oil circuit 4 is connected to speed
Logical drain path: when the axial displacement of rotor 1 is lower than threshold value, drain path is not connected to bearing block 2, mechanical axial direction position
The oil pressure that protective device 3 and speed are closed in oil circuit 4 is moved to remain unchanged；When the axial displacement of rotor 1 be more than threshold value when, drain path with
Bearing block 2 is connected to, and the oil in mechanical axial displacement limiting device 3 is released via the through-hole of the drain path and bearing block 2
Into lubricant passage way, so that its internal oil pressure reduces rapidly；
The speed closes oil circuit 4, including the first valve 41 and the first valve 41 control oil cylinder, wherein first valve 41
The control terminal of control oil cylinder is connected to the first oilhole 311 of the mechanical axial displacement limiting device 3, motion end and described the
The connection of one valve 41, first valve 41 are set on the fluid supplying passage 6 of connecting fluid source 300 and turbomachinery 100；
When oil pressure reduces in the mechanical axial displacement limiting device, which closes control the first valve 41 of closing of oil circuit 4, to close
Close the fluid supplying passage 6 of fluid source 300.
As a kind of preferably embodiment, referring to fig. 2, the mechanical axial displacement limiting device 3 and rotor 1 are coaxial
And it is relatively fixed on the bearing block 2 of rotor 1, comprising:
Shell 31, forms an accommodating chamber to 2 one side opening of bearing block inside the shell 31, which opens
Mouth end is fixed on the bearing block 2, is provided with through-hole on the bearing block 2, which is connected to lubricant passage way；The shell
It is provided on 31 side walls and closes the first oilhole 311 that oil circuit 4 is connected with speed；
Sleeve 32 with cavity, the sleeve 32 are set in the accommodating chamber, set on the side wall of 2 one end of bearing block
It is equipped with the second oilhole 321, which is connected to the through-hole of the bearing block 2, the one end of sleeve 32 far from bearing block 2
The third oilhole 322 being connected with the first oilhole 311 is provided on side wall；
Slide unit 33 with cavity, the slide unit 33 are installed in the cavity of the sleeve 32, can be along axial shifting
It is dynamic, and the cavity of the slide unit 33 is connected with the cavity of the sleeve 32；Slide unit 33 is close to one end of bearing block 2
It offsets with the end face of rotor 1, so that it can be axially moveable with rotor 1；It is provided on 33 side wall of slide unit multiple
The 4th oilhole 331 being connected to the cavity of slide unit 33, multiple 4th oilholes 331 are arranged in correspondence in second oilhole
321 left and right sides, thus when the slide unit 33 is more than threshold value with the mobile axial displacement of rotor 1, at least one the
Four oilholes 331 are connected with second oilhole 321；
The speed is closed the oil in oil circuit 4 and is entered in the cavity of slide unit 33 via the first oilhole 311, third oilhole 322,
When spacing of the axial displacement of rotor 1 less than the second oilhole 321 and the 4th oilhole 331, second oilhole 321 with it is described
It is not connected between 4th oilhole 331, oil pressure remains unchanged in slide unit 33；When the axial displacement of rotor 1 is greater than the second oilhole
321 with the spacing of the 4th oilhole 331 when, the second oilhole 321 is connected to the 4th oilhole 331, causes slide unit 33
Interior oil is released via the through-hole on the 4th oilhole 331, the second oilhole 321 and bearing block 2 to lubricant passage way, so that speed closes oil circuit
Oil pressure in 4 reduces, and triggers shutdown action.
As a kind of preferably embodiment, the one end of slide unit 33 far from bearing block 2 by an elastomeric element 332 with
The sleeve 32 offsets far from one end of bearing block 2；After 1 return of rotor, the elastomeric element 332 drives the slide unit
33 returns.
As a kind of preferably embodiment, to avoid the axial error as caused by being used for a long time, or in part feelings
Under condition, for axial displacement positive negative sense threshold value set different value the considerations of, the sleeve 32 is set as axially adjustable knot
Structure, in this way, being adjusted between the second oilhole 321 and the axial direction of its 4th oilhole 331 of two sides by the axial position of fine tuning sleeve 32
Away to realize the setting to the positive negative sense threshold value of axial displacement.Specifically, the program can be with are as follows: the shell 31 is far from bearing
One end of seat 2 is provided with one for adjusting the adjusting nut 36 of 32 axial position of sleeve, and one end of the adjusting nut 36 is set to
Outside the shell 31, after the other end runs through the shell 31, it is connect with the sleeve 32 far from the threaded one end of bearing block 2；It is logical
The relative axial position that the adjusting nut 36 adjusts the sleeve 32 and the slide unit 33 is crossed, so as to adjust axial displacement
Positive negative sense threshold value.
As a kind of preferably embodiment, a cushion block 38 is provided between the adjusting nut 36 and shell 31, it is described
After adjusting nut 36 sequentially passes through the cushion block 38 and shell 31, it is connected to the described one end of sleeve 32 far from bearing block 2.
As a kind of preferably embodiment, broad-ruler is provided on corresponding 31 inner wall of shell of first oilhole 311
It is very little to be greater than the radial dimension of first annular slot 312 of the first oilhole 311, thus make third oilhole 322 always with first oilhole
311 are connected；
Alternatively, in other preferably embodiment, the structure of first oilhole 311 can be with are as follows: its longitudinal section from
Interior to outer is in T-shape, and the inside aperture of first oilhole 311 is greater than the aperture of the third oilhole 322, thus when sleeve 32
When axial position changes, third oilhole 322 is connected with first oilhole 311 always.
As a kind of preferably embodiment, the second annular is provided on 31 inner wall of shell of the open end of the accommodating chamber
Slot 313, second annular groove 313 are connected with second oilhole 321 and bearing block 2, thus make the second oilhole 321 always with
The bearing block 2 is connected.
As a kind of preferably embodiment, to prevent in the process of running, slide unit 33 and sleeve 32 and/or shell
The relative circumferential position between 31 changes, when causing slide unit 33 that axial displacement occurs, the second oilhole 321 and the 4th oil
The case where axial position in hole 331 is staggered and cannot be connected to, present embodiment is to the shell 31, sleeve 32 and the sliding part
Circumferential relative position between part 33 is fixed, so that the axial displacement when the slide unit 33 is greater than the 4th oilhole 331
When with the spacing of the second oilhole 321, the 4th oilhole 331 is connected to the second oilhole 321.
As a kind of preferably embodiment, it is provided with the first pin hole on the side wall of the shell 31, the sleeve 32
It is provided with second pin hole coaxial with the first pin hole on side wall, particularly, is provided with an edge on 33 side wall of slide unit
Axially extending waist hole 333, running through between first pin hole, second pin hole and the waist hole 333 has an anti-rotation pin
It is fixed, simultaneously as the part uses axially extending 333 structure of waist hole, thus axial shifting of the sleeve 32 in threshold range
It moves unrestricted.
As a preferred embodiment, the shell 31 is Demountable, it such as include upper housing 31 and lower casing
Body 31, upper housing 31 and lower case 31 fasten and form accommodating chamber, so that sleeve 32, slide unit 33 can be according to the actual situation
Replacement e.g. when needing the whole positive and negative threshold difference reduced or increase axial displacement, can have the of respective aperture by replacing
The sleeve 32 of two oilholes 321 and/or the wheelbase for replacing two the 4th oilholes 331 are the slide unit 33 of analog value to realize.Certainly,
The shell 31 can also be left and right Demountable or front and back Demountable etc., and the application is not construed as limiting this.
As a preferred embodiment, the slide unit 33 includes slide valve.
Certainly, in other preferably embodiment, the sleeve 32 is integrally formed with the shell 31.
As a preferred embodiment, the shell 31 is fixed on close to one end of bearing block 2 by the first screw
On the bearing block 2.
Embodiment as one preferred, the sleeve 32 are integrally formed with the shell 31.
Embodiment as one preferred, it further includes being set to first valve 41 to control oil that the speed, which closes oil circuit 4,
The second valve 43 between the control terminal and first oilhole 311 of cylinder, before the booting of turbomachinery 100, first opening should
Second valve 43, it is ensured that the first valve 41 controls oil cylinder and controls the first valve 41 opening, so that fluid source 300 and turbine
Fluid supplying passage 6 between 100 control device of tool is unimpeded.
Embodiment as one preferred, as shown in Figure 1, it further includes being set to first valve that the speed, which closes oil circuit 4,
Door 41 controls the third valve 44 between another control terminal and first oilhole 311 of oil cylinder, is switched in turbomachinery 100
Before, first open second valve 43, it is ensured that after the first valve 41 controls oil cylinder the first valve 41 of opening, then open the third valve
44, make the control oil cylinder pressurization of the first valve 41, until closing the second valve 43 after oil pressure is stablized in the oil circuit 4 of speed pass.
Embodiment as one preferred, the mechanical rotor position protection system further includes flow control valve 51
And 51 control unit of flow control valve, the flow control valve 51 be set to the fluid source 300 and turbomachinery 100 it
Between fluid supplying passage 6 on, 51 control unit of flow control valve be set to the flow control valve 51 with it is described
Between first oilhole 311 of mechanical axial displacement limiting device 3；When oil pressure drops in the mechanical axial displacement limiting device
When low, flow control valve 51 is closed in 51 control unit of the flow control valve control, to close fluid supplying passage 6.
Embodiment as one preferred, 51 control unit of flow control valve includes governor 52, oil motor
53 and flow control valve 51 control oil cylinder, the governor 52 respectively with first oilhole 311, oil motor 53 and flow tune
Save valve 51 and control oil cylinder connection, the oil motor 53 and flow control valve 51 control oil cylinder with the flow control valve
51 connections, when oil pressure reduces in the mechanical axial displacement limiting device, the governor 52 controls the oil motor 53
And flow control valve 51 controls cylinder action, closes the flow control valve 51.
Embodiment as one preferred, the first oilhole 311 of the mechanical axial displacement limiting device 3 also with oil
Source 200 is connected to, and is provided with throttle part 7 between the oil sources 200 and the first oilhole 311, it is preferable that the throttle part 7 includes
Throttle valve.
In above structure, such as Fig. 2, slide unit 33 can slide axially in the sleeve 32 for being fitted into shell 31, sliding part
Part 33 is close to one end of bearing block 2 with high-speed rotating rotor 1 close to the end face smooth contact of 2 one end of bearing block.Shell 31 is used
First bolt 34 is fixed on bearing block 2 and has taper pin positioning, to guarantee the leakproofness assembled between shell 31 and bearing block 2,
Sealing ring 314 is added between shell 31 and bearing block 2.
Referring to fig. 2, in normal state, speed closes control oil and closes oily control chamber B by the speed that interface P enters device, passes through set
The third oilhole 322 of cylinder 32 enters inner cavity C, is selectively connected with bearing block 2 by the 4th oilhole 331.4th oilhole 331
Distance value with the second oilhole 321 is the setting value of axial displacement.
Slide unit 33 is tightly pressed at 1 end face of rotor by elastomeric element 332, and so that speed is closed control oil circuit stable oil
Pressure.When the axial displacement of the rotor 1 of turbomachinery 100 has change, slide unit 33 with rotor 1 to positively or negatively moving,
When axial displacement is more than threshold value (design protection value), the oil circuit of drain path is connected, and the speed in slide unit 33 closes control oil
It is released by the drain path to bearing block 2, oil pressure declines rapidly, closes quick-closing valve and servo valve, realizes that turbine promptly stops
Machine.
When unit resets, slide unit 33 is tightly pressed at 1 end face of rotor by elastomeric element 332 again, and speed is made to close control
There is stable oil pressure on liquefaction road, to guarantee that turbomachinery 100 works normally.
The present embodiment also provides a kind of a kind of turbomachinery based on above-mentioned mechanical axial displacement limiting device, system
100, which includes mechanical rotor position protection system as described above, the mechanical rotor position protection system
One end of system is fixed by bolts on the bearing block 2 of rotor 1, when the axial displacement of the rotor 1 in turbomachinery 100 exceeds threshold
When value, which controls the turbomachinery 100 and shuts down.
To sum up, the present invention uses mechanical axial displacement limiting device, compared to electronic type alarm tripgear, in structure
And stability with higher in performance；In addition, the rotor position protection threshold value of the mechanical rotor position protection system can lead to
It crosses and changes axial distance between the second oilhole and the 4th oilhole of the left and right sides to adjust, it is made to allow lesser axial displacement
In the presence of so that it be avoided to lead to turbomachinery frequent shutdown due to excessively sensitive；Under normal conditions, the second oilhole and left and right two
Axial distance between the 4th oilhole of side can be realized by replacement slide unit or sleeve；
When axial displacement occurs or exceeds threshold value, which can trigger turbomachinery by mechanical structure and shut down, axial
Displacement threshold value is controllable, reacts more accurate, can effectively avoid damage of the axial displacement to turbomachinery.
In addition, it should be noted that:
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention, it is all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, still fall within the technology of the present invention
In the range of scheme.
Claims (10)
1. a kind of mechanical axial displacement limiting device, which is characterized in that coaxial with rotor (1) and be relatively fixed in rotor
(1) on bearing block (2)；
The mechanical axial displacement limiting device includes:
Shell (31), the shell (31) is internal to form an accommodating chamber to (2) one side opening of bearing block, the accommodating chamber
Open end is fixed on the bearing block (2), is provided with through-hole on the bearing block (2), which is connected to lubricant passage way；Institute
It states to be provided on shell (31) side wall and closes the first oilhole (311) that oil circuit (4) are connected with speed；
Sleeve (32) with cavity, which is set in the accommodating chamber, on the side wall of bearing block (2) one end
The second oilhole (321) are provided with, which is connected to the through-hole on the bearing block (2), and sleeve (32) is far from axis
Hold the third oilhole (322) for being provided on one end side wall of seat (2) and being connected with the first oilhole (311)；
Slide unit (33) with cavity, the slide unit (33) are installed in the cavity of the sleeve (32), can be along axial direction
It is mobile, and the cavity of the slide unit (33) is connected with the cavity of the sleeve (32)；Slide unit (33) is close to bearing
One end of seat (2) and the end face of rotor (1) offset, so that it can be axially moveable with rotor (1)；The slide unit (33)
The 4th oilhole (331) that multiple cavitys with slide unit (33) are connected to is provided on side wall, multiple 4th oilholes (331) are corresponding
Ground is set to the left and right sides of second oilhole (321), thus the axial direction mobile with rotor (1) when the slide unit (33)
When displacement is more than threshold value, at least one the 4th oilhole (331) is connected with second oilhole (321)；
The speed closes the sky that the oil in oil circuit (4) enters slide unit (33) via the first oilhole (311), third oilhole (322)
It is intracavitary, when the axial displacement of rotor (1) is less than the spacing of the second oilhole (321) and the 4th oilhole (331), second oil
It is not connected between hole (321) and the 4th oilhole (331), slide unit (33) interior oil pressure remains unchanged；When the axis of rotor (1)
When being greater than the second oilhole (321) and the spacing of the 4th oilhole (331) to displacement, the second oilhole (321) and the 4th oil
Hole (331) connection causes the oil in slide unit (33) via the 4th oilhole (331), the second oilhole (321) and bearing block (2)
On through-hole release to lubricant passage way, thus speed close oil circuit (4) in oil pressure reduce, trigger shutdown action.
2. a kind of mechanical axial displacement limiting device according to claim 1, which is characterized in that slide unit (33) is remote
One end from bearing block (2) is offseted with the sleeve (32) far from the one end of bearing block (2) by an elastomeric element (332)；When
After rotor return, the elastomeric element (332) drives slide unit (33) return.
3. a kind of mechanical axial displacement limiting device according to claim 2, which is characterized in that the shell (31) is remote
One end from bearing block (2) is provided with one for adjusting the adjusting nut (36) of sleeve (32) axial position, the adjusting nut
(36) one end is set to outside the shell, after the other end runs through the shell (31), with the sleeve (32) far from bearing block
(2) threaded one end connection；The axial direction of the sleeve (32) and the slide unit (33) is adjusted by the adjusting nut (36)
Relative position, so as to adjust the positive negative sense threshold value of axial displacement.
4. a kind of mechanical axial displacement limiting device according to claim 3, which is characterized in that the adjusting nut
(36) it is provided between shell (31) cushion block (38), the adjusting nut (36) sequentially passes through the cushion block (38) and shell
(31) after, it is connected to the one end of the sleeve (32) far from bearing block (2).
5. a kind of mechanical axial displacement limiting device according to claim 2, which is characterized in that first oilhole
(311) width dimensions are provided on corresponding shell (31) inner wall greater than the first oilhole (311) radial dimension of first annular slot
(312), so that third oilhole (322) be made to be connected always with first oilhole (311)；
Alternatively, the longitudinal section of first oilhole (311) is in T-shape from the inside to the outside, the inside aperture of first oilhole (311) is big
In the aperture of the third oilhole (322), so that third oilhole (322) begins when the axial position of sleeve (32) changes
It is whole to be connected with first oilhole (311).
6. a kind of mechanical axial displacement limiting device according to claim 5, which is characterized in that the accommodating chamber is opened
The second annular groove (313) are provided on shell (31) inner wall at mouth end, second annular groove (313) and second oilhole
(321) it is connected with bearing block (2), so that the second oilhole (321) be made to be connected always with the bearing block (2).
7. a kind of mechanical axial displacement limiting device according to claim 6, which is characterized in that the shell (31),
Circumferential position between sleeve (32) and the slide unit (33) is relatively fixed, to work as the axial direction of the slide unit (33)
When displacement is more than threshold value, the 4th oilhole (331) is connected with the second oilhole (321).
8. a kind of mechanical axial displacement limiting device according to claim 7, which is characterized in that the shell (31)
It is provided with the first pin hole on side wall, second pin hole coaxial with the first pin hole, institute are provided on the side wall of the sleeve (32)
State and be provided with a waist hole (333) axially extended on slide unit (33) side wall, first pin hole, second pin hole and
Running through between the waist hole (333) has an anti-rotation pin.
9. a kind of mechanical axial displacement limiting device according to claim 1, which is characterized in that the sleeve (32) with
The shell (31) is integrally formed.
10. a kind of turbomachinery, which is characterized in that including mechanical axial displacement as claimed in any one of claims 1-9 wherein
Protective device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910660709.7A CN110273717B (en) | 2019-07-22 | 2019-07-22 | Turbine machine and mechanical axial displacement protection device thereof |
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| CN201910660709.7A CN110273717B (en) | 2019-07-22 | 2019-07-22 | Turbine machine and mechanical axial displacement protection device thereof |
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| CN110273717B CN110273717B (en) | 2024-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135348A (en) * | 2021-11-11 | 2022-03-04 | 河北国源电气股份有限公司 | Adjustable integrated holding ring for steam turbine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110273717B (en) | 2024-03-12 |
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