CN203161614U - Disc spring and bearing combined support structure for vertical pump - Google Patents
Disc spring and bearing combined support structure for vertical pump Download PDFInfo
- Publication number
- CN203161614U CN203161614U CN 201320167971 CN201320167971U CN203161614U CN 203161614 U CN203161614 U CN 203161614U CN 201320167971 CN201320167971 CN 201320167971 CN 201320167971 U CN201320167971 U CN 201320167971U CN 203161614 U CN203161614 U CN 203161614U
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- bearing
- rotor
- dish spring
- spring group
- disc spring
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Abstract
The utility model relates to a disc spring and bearing combined support structure for a vertical pump, which comprises an upper bearing, a rotor, and a lower bearing, wherein the rotor is arranged at a central part of a rotating shaft; the upper bearing and the lower bearing are mounted on the rotating shaft at the upper end and the lower end of the rotor respectively; a disc spring group is arranged outside each of the upper bearing and the lower bearing; and gaskets are arranged between the upper bearing and the corresponding disc spring group, and between the lower bearing and the corresponding disc spring group respectively; and a large-diameter sealing ring is arranged at the rear part of a final-stage impeller. The disc spring and bearing combined support structure has the benefits that the machining precision is high, the service life of an axial force balance mechanism is long, and wear ring dimension of the final-stage impeller is adjusted through calculation and tests, so that most axial force is balanced; the disc springs are additionally arranged at two supporting ends of the two bearings, the rotor is located in a float state through pre-compression during assembly, and the rotor is prevented from being ground with a stator during start-up; and in an operation process, the disc springs and the bearings bear residual axial force of the rotor, accordingly, the rotor can float up and down freely, and locking of the rotor due to temperature difference change is avoided.
Description
Technical field
The utility model relates to the vertical pump technology for industries such as chemical industry, industrial and mining enterprise, national defence scientific researches, relates in particular to that a kind of number of starts is frequent, temperature rate of change is big, to the high vertical pump dish spring of bearing reliability requirement, the compound supporting structure of bearing.
Background technique
Vertical pump is a kind of medium motion that orders about, and the transformation of energy that prime mover is exported is the energy conversion device of pressure medium energy.At present, common vertical pump rotor and stator are located mutually, and rotor can not float by easy on and off, because temperature gradient is big, the difference of material and structure causes the frequent locking of rotor, so can not be used for the big environment of temperature rate of change.And present vertical cryopump axial force balance mode mainly adopts the Balance disc balance, by the free floating of rotor, adjusts gap between Balance disc and stator, changes the balanced capacity of Balance disc, realizes axial force balance, and residual axial force is born by bearing.Its characteristics mainly show structurally: 1. requirement on machining accuracy height, the particularly planeness of two fitting surfaces, the requirement of perpendicularity, processing cost height; 2. when compressor emergency shutdown, owing to do not have pressure difference before and after the Balance disc, can not form upwards support force, under rotor deadweight effect, Balance disc and stator are in fit-state, and when starting acceleration, Balance disc and stator produce and grind; 3. owing to structural relation, back impeller ring diameter is general all less than the inlet seal ring diameter, and the axial force that pump impeller produces is mainly the pressure difference of impeller front and rear cover plate, and its direction generally vertically downward.After the pressure of pump was set up, Balance disc and stator were thrown off under pressure, and both just can stop to grind, and in unit starting Environmental Conditions frequently, the wearing and tearing of Balance disc cause reduce greatly the working life of unit, have increased the use operating cost of unit.Therefore, at above aspect, need rationally improve prior art.
Summary of the invention
At above defective, the utility model provides a kind of machining accuracy height, be conducive to prolong the axial force balance mechanism operating life, can reduce manufacture cost, can avoid taking place vertical pump dish spring, the compound supporting structure of bearing of rotor locking phenomenon, to solve many deficiencies of prior art.
For achieving the above object, the utility model is by the following technical solutions:
A kind of vertical pump dish spring, the compound supporting structure of bearing, comprise upper bearing (metal), rotor, lower bearing, rotor is arranged at the rotating shaft core, be positioned in the rotating shaft of rotor upper/lower terminal and install bearing, lower bearing respectively, described upper bearing (metal), the lower bearing outside arranges a dish spring group respectively, between upper bearing (metal) and the dish spring group, between lower bearing and the dish spring group pad is set respectively;
Each dish spring group inner end holds out against pad and the bearing unit of a corresponding side, and the central point of each dish spring group, pad and upper bearing (metal), each assembly axis hole of lower bearing is located along the same line;
Simultaneously, on the axle head of described lower bearing periphery impeller is installed, each dish spring group outer end is closely attached on the hubcap internal surface of a corresponding side; Described impeller rear portion arranges the major diameter seal ring.
The beneficial effect of vertical pump dish spring described in the utility model, the compound supporting structure of bearing is:
⑴ machining accuracy height, the axial force balance mechanism long working life is by calculating, test adjustment impeller choma size, the most of axial force of balance;
⑵ set up the dish spring by the two ends of supporting in two bearings, by compressing in advance, makes rotor be in quick condition during assembling, and rotor and stator grind when avoiding starting;
In running, the residue axial force of dish spring, bearing bear rotor, rotor can freely fluctuate, and has avoided because difference variation generation rotor locking phenomenon.
Description of drawings
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the described vertical pump dish of the utility model embodiment spring, the compound supporting structure schematic representation of bearing.
Among the figure:
1, dish spring group; 2, pad; 3, upper bearing (metal); 4, rotor; 5, lower bearing; 6, impeller.
Embodiment
As shown in Figure 1, the described vertical pump dish of the utility model embodiment spring, the compound supporting structure of bearing, comprise upper bearing (metal) 3, rotor 4, lower bearing 5, described rotor 4 is arranged at the rotating shaft core, be positioned on the rotor 4, install bearing 3 in the rotating shaft at following two ends successively respectively, lower bearing 5, described upper bearing (metal) 3, lower bearing 5 outsides arrange a dish spring group 1 respectively, between upper bearing (metal) 3 and dish spring group 1, between lower bearing 5 and the dish spring group 1 pad 2 is set respectively, each dish spring group 1 inner end holds out against pad 2 and the bearing unit of a corresponding side, each dish spring group 1 outer end then is closely attached on the hubcap internal surface of a corresponding side, each dish spring group 1, pad 2 and upper bearing (metal) 3, the central point of lower bearing 5 each assemblies is located along the same line.Simultaneously, impeller 6 is installed on the axle head of described lower bearing 5 peripheries, these impeller 6 rear portions arrange the major diameter seal ring.By increasing impeller 6 increasing back sealing ring diameters, make the axial force of its generation vertically upward, realize most of balance of axial force, residual axial force is born by the dish spring by bearing, pad 2 backs, and bearing bears residual axial force and rotor radial power; After adopting dish spring group 1, rotor 4 can freely fluctuate, and has avoided the distortion of rotor 4 when difference variation to cause locking.During compressor emergency shutdown; though because rotor 4 deadweights cause the compressive strain of bottom dish spring group 1; cause rotor 4 to sink, but because the quality of rotor 4 is little, the rigidity of dish spring group 1 is bigger; dish spring group 1 compressive strain that deadweight causes is very little; the distance that rotor 4 sinks is very little, can ignore substantially, has avoided the friction between rotor 4 and stator; in the running, rotor 4 residual axial force all can be born by one group of dish spring group 1 wherein.
The described vertical pump dish of above the utility model embodiment spring, the compound supporting structure of bearing not only can improve the reliability of the axial force balance mechanism of unit, and can effectively reduce manufacture cost, improve the service life of unit.
Above embodiment is more preferably embodiment a kind of of the utility model, and the common variation that those skilled in the art carry out in the technical program scope and replacing should be included in the protection domain of the present utility model.
Claims (3)
1. a vertical pump dish spring, the compound supporting structure of bearing comprise upper bearing (metal) (3), rotor (4), lower bearing (5), and rotor (4) is arranged at the rotating shaft core, it is characterized in that:
Be positioned in the rotating shaft of rotor (4) upper/lower terminal and install bearing (3), lower bearing (5) respectively, described upper bearing (metal) (3), lower bearing (5) outside arranges a dish spring group (1) respectively, is positioned between upper bearing (metal) (3) and the dish spring group (1), a pad (2) is set between lower bearing (5) and the dish spring group (1) respectively;
Each dish spring group (1) inner end holds out against pad (2) and the bearing unit of a corresponding side, and the central point of each dish spring group (1), pad (2) and upper bearing (metal) (3), each assembly axis hole of lower bearing (5) is located along the same line;
Simultaneously, on the axle head of described lower bearing (5) periphery impeller (6) is installed.
2. vertical pump dish spring according to claim 1, the compound supporting structure of bearing, it is characterized in that: each dish spring group (1) outer end is closely attached on the hubcap internal surface of a corresponding side.
3. vertical pump dish spring according to claim 1, the compound supporting structure of bearing, it is characterized in that: described impeller (6) rear portion arranges the major diameter seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320167971 CN203161614U (en) | 2013-04-07 | 2013-04-07 | Disc spring and bearing combined support structure for vertical pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320167971 CN203161614U (en) | 2013-04-07 | 2013-04-07 | Disc spring and bearing combined support structure for vertical pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161614U true CN203161614U (en) | 2013-08-28 |
Family
ID=49022801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320167971 Expired - Lifetime CN203161614U (en) | 2013-04-07 | 2013-04-07 | Disc spring and bearing combined support structure for vertical pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050054A (en) * | 2017-11-29 | 2018-05-18 | 西安航天泵业有限公司 | A kind of temperature deformation compensator and double shell sectional type multi-stage pump |
-
2013
- 2013-04-07 CN CN 201320167971 patent/CN203161614U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050054A (en) * | 2017-11-29 | 2018-05-18 | 西安航天泵业有限公司 | A kind of temperature deformation compensator and double shell sectional type multi-stage pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |