CN209147964U - Steam turbine differential expansion measuring device - Google Patents
Steam turbine differential expansion measuring device Download PDFInfo
- Publication number
- CN209147964U CN209147964U CN201822267203.3U CN201822267203U CN209147964U CN 209147964 U CN209147964 U CN 209147964U CN 201822267203 U CN201822267203 U CN 201822267203U CN 209147964 U CN209147964 U CN 209147964U
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- China
- Prior art keywords
- rotor
- wheel disc
- seal ring
- oil seal
- probe
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Abstract
The utility model discloses a kind of steam turbine differential expansion measuring devices, including the wheel disc being fixed on rotor, the oil seal ring being placed on the rotor and probe positioned at the wheel disc side, the wheel disc is located in rear bearing block, the oil seal ring is equipped with installation through-hole, and the probe is fixed in the mounting through hole.Since wheel disc is located in rear bearing block, when so that rotor band runner disc rotating, air blast phenomenon will not be generated between wheel disc and oil seal ring, also it would not aggravate the outside overflow in gap of the lubricating oil between oil seal ring and rotor, lubricating oil waste is few, reduce unnecessary waste, reduces maintenance cost；Since probe is fixed in the installation through-hole on oil seal ring, probe installing structure is simple, saves material, at low cost.
Description
Technical field
The utility model relates to steam turbine fields, specifically, are related to a kind of steam turbine differential expansion measuring device.
Background technique
When steam turbine, which starts, to be heated or is out of service cooling and when load changes, cylinder and rotor can all be generated
Thermal expansion or cooling meat.Since rotor heated surface area is bigger than cylinder, and the corresponding cylinder of mass ratio of rotor is small, steam
It is larger to the exothermic coefficient of rotor surface.Therefore, under the same conditions, the temperature change of rotor is faster than cylinder, rotor and cylinder
Between there are differential expansions, and this difference refers to rotor for cylinder, therefore referred to as relative expansion is poor (i.e. swollen difference).
As shown in Figure 1, being arranged with rear bearing block upper cover 2 outside rotor 1, oil seal ring 3 is fixed in rear bearing block upper cover 2, oil
Seal ring 3 is sheathed on rotor 1, is tightly connected between oil seal ring 3 and rotor 1, on rotor 1 fixing sleeve be equipped with wheel disc 9,9, wheel disc
In the outside of rear bearing block, the side of wheel disc 9 is equipped with the probe 7 for detecting the displacement of 1 axial expansion of rotor, and probe 7 is fixed on
It on connecting plate 6, is welded to connect between connecting plate 6 and support plate 4 by cylinder bar 5, support plate 4 is fixed on by studs
Rear bearing block upper cover 2.One end of rotor 1 is additionally provided with shaft coupling 8.
When 1 expanded by heating of rotor, it is displaced and changes between wheel disc 9 and probe 7, the variation of 7 detection displacement of probe, and
Shift value is fed back into electronic control unit.But when the rotation of rotor 1, band runner disc 9 is rotated, and drum is formed between wheel disc 9 and oil seal ring 3
Wind phenomenon causes to exacerbate the outside overflow in gap of the bearing oil between oil seal ring 3 and rotor 1 in rear bearing block
Keep steam turbine oil leak quite serious, cause unnecessary waste, improves maintenance cost.In addition, probe 7 passes through connection
Plate 6, cylinder bar 5, support plate 4 and studs are fixed in rear bearing block upper cover 2, and connection structure is complicated, at high cost.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of steam turbine differential expansion measuring devices, to solve to lubricate
The serious problem of the outside overflow in gap of the oil between oil seal ring and rotor.
In order to solve the above technical problems, the technical solution of the utility model is:
Steam turbine differential expansion measuring device include: the wheel disc being fixed on rotor, the oil seal ring being placed on the rotor and
Probe positioned at the wheel disc side, the wheel disc are located in rear bearing block, and the oil seal ring is equipped with installation through-hole, the spy
Head is fixed in the mounting through hole.
Preferably, the direction of the installation through-hole is consistent with the direction of the rotor.
Preferably, the wheel disc is wholely set with the rotor.
Preferably, the installation through-hole is threaded hole, and the probe screw thread is installed in the threaded hole.
After above-mentioned technical proposal, the beneficial effects of the utility model are:
Since wheel disc is located in rear bearing block, when so that rotor band runner disc rotating, will not be produced between wheel disc and oil seal ring
Raw air blast phenomenon would not also aggravate the outside overflow in gap of the lubricating oil between oil seal ring and rotor, and lubricating oil waste is few, subtracts
Lack unnecessary waste, reduces maintenance cost；Since probe is fixed in the installation through-hole on oil seal ring, probe peace
Assembling structure is simple, saves material, at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of steam turbine differential expansion measuring device in the prior art；
Fig. 2 is the structural schematic diagram of the utility model steam turbine differential expansion measuring device；
In figure: 1- rotor；2- rear bearing block upper cover；3- oil seal ring；4- support plate；5- cylinder bar；6- connecting plate；7- is visited
Head；8- shaft coupling；9- wheel disc.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, and it is not used in restriction the utility model.
As shown in Fig. 2, a kind of steam turbine differential expansion measuring device, wheel disc 9 is located at the inside of rear bearing block, and fixing sleeve, which is set to, to be turned
On son 1, if wheel disc 9 does not influence the processing of the balance hole on impeller, wheel disc 9 is wholely set with rotor 1, to reduce processing work
Sequence.
Oil seal ring 3 is equipped with installation through-hole, and installation through-hole is preferably threaded hole, and the mode that probe 7 is connected through a screw thread is solid
Due in installation through-hole, probe 7 can also be fixed in installation through-hole by way of being interference fitted or being glued.
Since wheel disc 9 is located at the inside of rear bearing block, when rotor 1 is rotated with runner disc 9, between wheel disc 9 and oil seal ring 3
Air blast phenomenon will not be generated, and then avoids the outside overflow in gap of the lubricating oil of bearing between oil seal ring 3 and rotor 1, is solved
The excessive serious problem of turbo-engine lube of having determined.
7 mode that is connected through a screw thread of probe is fixed on oil seal ring 3, pop one's head in 7 mounting structure it is simple, the material used
It is few, it is at low cost.
The above is the citing of the utility model preferred forms, wherein the part that do not address in detail is this field
The common knowledge of those of ordinary skill.The protection scope of the utility model is based on the contents of the claims, any to be based on this reality
The equivalent transformation carried out with novel technical inspiration, is also within the protection scope of the utility model.
Claims (4)
1. steam turbine differential expansion measuring device, comprising: the wheel disc that is fixed on rotor, the oil seal ring being placed on the rotor and position
Probe in the wheel disc side, which is characterized in that the wheel disc is located in rear bearing block, and it is logical that the oil seal ring is equipped with installation
Hole, the probe are fixed in the mounting through hole.
2. steam turbine differential expansion measuring device as described in claim 1, which is characterized in that the direction of the installation through-hole with it is described
The direction of rotor is consistent.
3. steam turbine differential expansion measuring device as described in claim 1, which is characterized in that the wheel disc is integrally set with the rotor
It sets.
4. steam turbine differential expansion measuring device as described in any one of claims 1-3, which is characterized in that the installation through-hole is spiral shell
Pit, the probe screw thread are installed in the threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822267203.3U CN209147964U (en) | 2018-12-29 | 2018-12-29 | Steam turbine differential expansion measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822267203.3U CN209147964U (en) | 2018-12-29 | 2018-12-29 | Steam turbine differential expansion measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209147964U true CN209147964U (en) | 2019-07-23 |
Family
ID=67291141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822267203.3U Active CN209147964U (en) | 2018-12-29 | 2018-12-29 | Steam turbine differential expansion measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209147964U (en) |
-
2018
- 2018-12-29 CN CN201822267203.3U patent/CN209147964U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |