CN106812727A - The choma fixed connection structure and its quick method for dismounting of a kind of centrifugal multistage pump multiple centrifugal pump - Google Patents
The choma fixed connection structure and its quick method for dismounting of a kind of centrifugal multistage pump multiple centrifugal pump Download PDFInfo
- Publication number
- CN106812727A CN106812727A CN201710224878.7A CN201710224878A CN106812727A CN 106812727 A CN106812727 A CN 106812727A CN 201710224878 A CN201710224878 A CN 201710224878A CN 106812727 A CN106812727 A CN 106812727A
- Authority
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- China
- Prior art keywords
- choma
- pump housing
- pump
- screw
- centrifugal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000013461 design Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid 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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to pump housing hydraulic engineering design technical field, the choma fixed connection structure and its quick method for dismounting of particularly a kind of centrifugal multistage pump multiple centrifugal pump.Choma under choma and the pump housing on the pump housing of invention, it is characterised in that choma opens up connection shaft shoulder screw in connecting hole, connecting hole with the junction of choma under the pump housing on the pump housing.Using shaft shoulder screw, positioned using the shaft shoulder screw first half, lower half connection.This solution solves the problem of insufficient space, gap is opened up on choma on the pump housing, be easily installed tool operation.Choma opens up connection open circles pin in connecting hole, connecting hole with the junction of choma under the pump housing on the pump housing, and open circles pin inner side is provided with screw thread, and screw thread is connected with fillister head screw, and fillister head screw one end is connected through open circles pin with choma under the pump housing.Further reduce gap.
Description
Technical field
The present invention relates to pump housing hydraulic engineering design technical field, the choma fixed connection structure of particularly a kind of centrifugal multistage pump multiple centrifugal pump
And its quick method for dismounting.
Background technology
Multistage middle open formula centrifugal pump body choma is very important part, and the number of parts is big, for the ease of pump
The installation of body choma, maintenance, replacing, are generally designed to middle open type structure by pump housing choma（Fig. 1）.This middle open type pump housing choma
To internal diameter d, outer diameter D required precision is very high, and especially internal diameter d requirements cylindricity is within 0.02mm, if not reaching this requirement, pump
Eccentric wear can be produced in operation process middle pump body choma and rotor, the normal operation of pump is influenceed, the life-span of pump is substantially reduced.Therefore
This middle open type pump housing choma difficulty of processing is very big, be mainly manifested in choma on the pump housing, under the pump housing choma close it is processed when easily misplace,
It is difficult to ensure that the cylindricity and axiality of middle open type pump housing choma.
Existing processing technology thinking has following several：
Scheme one, middle open type pump housing choma only use mode connects for screw；This kind of scheme is simple, but two halves are easily wrong in process
Position, it is impossible to reach precision prescribed.
Scheme two, using common cylinder finger setting and use mode connects for screw；This kind of scheme meets processing technology requirement, both can be with
Ensure that positioning can ensure connection again, but pump housing choma axial dimension is limited, and space is small, it is difficult to while accommodating straight pin and spiral shell
Nail.
Using existing above two design, the middle open type pump housing choma internal diameter d cylindricities being processed into are much larger than
, there is apparent inconsistent phenomenon in 0.02mm, the product for processing is unqualified in secondary assembling process.
The content of the invention
To overcome drawbacks described above, the technical problem to be solved in the invention is to provide and a kind of do not change original space structure and make
Pump housing choma two halves are realized reliably positioning and connecting, and the choma of the centrifugal multistage pump multiple centrifugal pump of raising processing and assembly reliability is fixed and connected
Binding structure and its quick method for dismounting.
Technical problem technical scheme described in solution：
A kind of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump, including choma under choma and the pump housing on the pump housing, the pump housing are suitable for reading
Ring opens up connection shaft shoulder screw in connecting hole, connecting hole with the junction of choma under the pump housing.
On the pump housing gap is opened up on choma.
Choma opens up connection open circles pin in connecting hole, connecting hole with the junction of choma under the pump housing on the pump housing,
Open circles pin inner side is provided with screw thread, and screw thread is connected with fillister head screw, and fillister head screw one end passes through open circles pin and pump
Choma connection under body.
Plain washer is provided between the open circles pin and fillister head screw.
The open circles pin inner side is provided with one section of internal thread, and another section is through hole.
The nut of the fillister head screw opens up interior hexagonal hole.
The open circles pin, fillister head screw and plain washer are coaxially laid, and open circles pin is with connecting hole for transition is matched somebody with somebody
Close.
Symmetrical opening up sets locating piece to choma with choma under the pump housing in location dimples, location dimples on the pump housing.
A kind of quick method for dismounting of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump, comprises the following steps：
A, choma splicing
Choma is buckled on the pump housing and is stitched together with choma under the pump housing on the pump housing；
B, it is fixedly connected
Choma is connected shaft shoulder screw or open circles pin with the connecting hole of choma under the pump housing on the pump housing, tightens screw and completes peace
Dress；
C, dismounting connection
Screw is unclamped, choma and shaft shoulder screw or open circles pin in the connecting hole of choma under the pump housing on the pump housing is removed, pump is separated
Choma completes dismounting with choma under the pump housing on body.
Also include
D, positioning are sealed
Step A carry out in location dimples placement positioning block realize positioning it is sealed.
Beneficial effects of the present invention are：
1st, choma under choma and the pump housing on the pump housing of the invention, it is characterised in that the company of choma and choma under the pump housing on the pump housing
The place of connecing opens up connection shaft shoulder screw in connecting hole, connecting hole.Using shaft shoulder screw, positioned using the shaft shoulder screw first half, lower half
Portion connects.This solution solves the problem of insufficient space, gap is opened up on choma on the pump housing, be easily installed tool operation.
2nd, the junction of choma opens up connection hollow cylinder in connecting hole, connecting hole under choma and the pump housing on the pump housing
Pin, open circles pin inner side be provided with screw thread, screw thread be connected with fillister head screw, fillister head screw one end pass through open circles pin and
Choma connection under the pump housing.Gap is further reduced, while preventing moving between part, locating effect is lifted, by open circles pin
Dual position with connecting hole limits erection ＆ lift precision.Plain washer is provided between the open circles pin and fillister head screw,
Lifting bonding strength, is easy to the later stage to dismantle.
3rd, the open circles pin inner side is provided with one section of internal thread, and another section is through hole.Fillister head screw upper end with it is hollow
Straight pin inner side internal thread is fixed, and fillister head screw lower end is fixed with connecting hole, is reduced difficulty of processing and is fixed with time-division multiple spot, point
Stress and lifting connection precision and intensity are dissipated, the nut of fillister head screw opens up interior hexagonal hole.Reserve bigger operating space.It is described
Symmetrical opening up sets locating piece to choma with choma under the pump housing in location dimples, location dimples on the pump housing.Locking mechanism is set up, is had
Effect prevents operational vibration from causing eccentric wear.
Brief description of the drawings
Fig. 1 is prior art construction schematic diagram；
Fig. 2 is schematic structural view of the invention I；
Fig. 3 is schematic structural view of the invention II；
Fig. 4 is partial enlarged drawing of the present invention and force analysis；
Fig. 5 is assembling schematic diagram of the present invention；
Fig. 6 is open circles pin sectional view of the present invention.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
A kind of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump, including choma, the pump housing under choma and the pump housing on the pump housing
Upper choma 1 opens up connection shaft shoulder screw 3 in connecting hole, connecting hole with the junction of choma 2 under the pump housing.Choma 1 on the pump housing
On open up gap.
Choma 1 opens up connection open circles pin in connecting hole, connecting hole with the junction of choma 2 under the pump housing on the pump housing
4, the inner side of open circles pin 4 is provided with screw thread, and screw thread is connected with fillister head screw 5, and the one end of fillister head screw 5 passes through open circles pin
4 are connected with choma under the pump housing 2.Plain washer 6 is provided between the open circles pin 4 and fillister head screw 5.The open circles pin
4 inner sides are provided with one section of internal thread, and another section is through hole.The nut of the fillister head screw 5 opens up interior hexagonal hole.The open circles
Pin 4, fillister head screw 5 and plain washer 6 are coaxially laid, and open circles pin 4 is interference fits with connecting hole.The pump housing is suitable for reading
Symmetrical opening up sets locating piece 7 to ring 1 with choma 2 under the pump housing in location dimples, location dimples.
A kind of quick method for dismounting of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump, comprises the following steps：
A, choma splicing
Choma 1 is buckled on the pump housing and is stitched together with choma under the pump housing 2 on the pump housing；
B, it is fixedly connected
Choma 1 is connected shaft shoulder screw 3 or open circles pin 4 with the connecting hole of choma under the pump housing 2 on the pump housing, tightens screw completion
Install；
C, dismounting connection
Screw is unclamped, choma 1 and shaft shoulder screw 3 or open circles pin 4 in the connecting hole of choma 2 under the pump housing on the pump housing is removed, point
Choma 1 completes dismounting with choma 2 under the pump housing on turn on pump body.
D, positioning are sealed
Step A carry out in location dimples placement positioning block 7 realize positioning it is sealed.
Part in the present invention is shown such as Fig. 3, Fig. 4, open circles pin is design specialized part, is core of the invention zero
Part.
Pump housing choma（On）With pump housing choma（Under）Pin hole processing is matched, first has to ensure that pin-and-hole is absolute on two semi-rings
Axiality, otherwise open circles pin cannot be installed；Secondly, pin-and-hole sizeD2 is critical size, and processing request is shown in Table one；The pump housing
Choma（Under）Pin-and-hole depth dimensions D2≤H1≤D2；
The middle open type pump housing choma dowel hole requirement on machining accuracy of table one
| Size | Accuracy class | Roughness | Cylindricity |
| D2 | 5 ~ 9 grades | Ra≤3.2µm | By 5 ~ 9 class precisions |
Open circles pin is core part of the invention, as shown in fig. 6, open circles pin external cylindrical surface dimension D 1 is crucial chi
Very little, processing request is shown in Table two；Length dimension L can be designed according to size H2, and guarantee size h=1 ~ 2mm, i.e. L=is should be noted during design
H1+H2-h.One section of chamfering of hollow cylinder pin head part Excircle machining, chamfer dimesion θ=15 ° ~ 20 °, L2=2 ~ 3mm, at chamfering
Corner angle rounding is simultaneously polished, and this is, for the ease of assembling, to play guiding function.Screw thread, size M are processed at open circles pin afterbody endoporus
Depending on open circles pin outer diameter D 1, ordinary circumstance M-D1 >=4mm；
The open circles pin requirement on machining accuracy of table two
| Size | Accuracy class | Roughness | Cylindricity |
| D1 | 5 ~ 9 grades | Ra≤0.8µm | By 5 ~ 9 class precisions |
Pin connection strength check need to be carried out during design open circles pin：
Calculate the shear stress of pin：, then it is qualified.
In formula：The shearing force that F-pin bears, N；
The diameter of d-pin, mm；
The quantity of Z-pin；
The shear stress allowable of-pin.
The selection of hexagon socket head fillister head screw and plain washer mainly has claimed below：The selection of screw is needed and hollow cylinder
Pin coordinates, and screw specification size is smaller No. one than open circles pin dimension of inner screw thread M, if example open circles pin afterbody dimension of inner screw thread
M is M12, then be the screw of M10 from specification；The selection of plain washer need to match somebody with somebody with open circles pin and hexagon socket cap head screw
Close, it is ensured that plain washer outside dimension >=（D1 + 2）.
Hexagon socket cap head screw need to be attached strength check:
Screw receives axial load：, then it is qualified.
Allowable stress
Full payload
Pretightning force
Residual pre-tightening forces
In formula：- axial load, N；
Axial full payload, N suffered by-screw；
- residual pre-tightening forces, N；
d1- screw path, mm；
K-residual pre-tightening forces coefficient, is that general connection is used in the present invention, and K takes 0.2 ~ 0.6；
λ-relative rigidity, chooses according to gasket material, uses metallic gasket, λ to take 0.2 ~ 0.3 in the present invention；
- screw yield strength, Mpa is determined by mechanical performance grade；
- safety coefficient, is dead load in the present invention,Take 3 ~ 5.
Specific assembling refers to Fig. 5, first with open circles pin by pump housing choma（On）、（Under）Positioning, this process notes needing
Open circles pin is installed in place, next plain washer is installed successively and use interior hexagonal cylindrical head connection can be to pump housing choma
Finished.
Example explanation：
Open circles pin size：D1=16m6, L=33, M=M12, θ=15 °, L2=3mm；
Middle open type pump housing choma junction pin-and-hole size：D2=16H7, H1=10, H2=25；
Middle open type pump housing choma junction screwed hole size：M10, deep 15；
From hexagon socket cap head screw M10 × 50（GB/T70.1-2000）, packing ring 10（GB/T96.1-2002）.
Claims (10)
1. the choma fixed connection structure of a kind of centrifugal multistage pump multiple centrifugal pump, including choma under choma and the pump housing on the pump housing, it is characterised in that
Choma on the pump housing（1）With choma under the pump housing（2）Junction open up connecting hole, connection shaft shoulder screw in connecting hole（3）.
2. a kind of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump according to claim 1, it is characterised in that the pump housing
Upper choma（1）On open up gap.
3. a kind of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump according to claim 1, it is characterised in that the pump housing
Upper choma（1）With choma under the pump housing（2）Junction open up connecting hole, connection open circles pin in connecting hole（4）, hollow cylinder
Pin（4）Inner side is provided with screw thread, screw thread and fillister head screw（5）Connection, fillister head screw（5）One end passes through open circles pin（4）
With choma under the pump housing（2）Connection.
4. the choma fixed connection structure of a kind of centrifugal multistage pump multiple centrifugal pump according to claim 3, it is characterised in that described hollow
Straight pin（4）And fillister head screw（5）Between be provided with plain washer（6）.
5. the choma fixed connection structure of a kind of centrifugal multistage pump multiple centrifugal pump according to claim 3, it is characterised in that described hollow
Straight pin（4）Inner side is provided with one section of internal thread, and another section is through hole.
6. a kind of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump according to claim 3, it is characterised in that the cylinder
Head screw（5）Nut open up interior hexagonal hole.
7. the choma fixed connection structure of a kind of centrifugal multistage pump multiple centrifugal pump according to claim 3, it is characterised in that described hollow
Straight pin（4）, fillister head screw（5）And plain washer（6）It is coaxial to lay, open circles pin（4）It is interference fits with connecting hole.
8. a kind of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump according to claim 1, it is characterised in that the pump housing
Upper choma（1）With choma under the pump housing（2）On symmetrically open up location dimples, locating piece is set in location dimples（7）.
9. the fast quick-detach side of choma fixed connection structure of a kind of centrifugal multistage pump multiple centrifugal pump according to any one of claim 1 to 8
Method, it is characterised in that comprise the following steps：
A, choma splicing
Choma on the pump housing（1）With choma under the pump housing（2）It is buckled on the pump housing and is stitched together；
B, it is fixedly connected
Choma on the pump housing（1）With choma under the pump housing（2）Connecting hole in connection shaft shoulder screw（3）Or open circles pin（4）, tighten
Screw completes to install；
C, dismounting connection
Screw is unclamped, choma on the pump housing is removed（1）With choma under the pump housing（2）Connecting hole in shaft shoulder screw（3）Or hollow cylinder
Pin（4）, separate choma on the pump housing（1）With choma under the pump housing（2）Complete dismounting.
10. a kind of quick method for dismounting of choma fixed connection structure of centrifugal multistage pump multiple centrifugal pump according to claim 9, its feature
It is also to include
D, positioning are sealed
Step A carry out in location dimples placement positioning block（7）Realize that positioning is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710224878.7A CN106812727A (en) | 2017-04-07 | 2017-04-07 | The choma fixed connection structure and its quick method for dismounting of a kind of centrifugal multistage pump multiple centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710224878.7A CN106812727A (en) | 2017-04-07 | 2017-04-07 | The choma fixed connection structure and its quick method for dismounting of a kind of centrifugal multistage pump multiple centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106812727A true CN106812727A (en) | 2017-06-09 |
Family
ID=59116471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710224878.7A Pending CN106812727A (en) | 2017-04-07 | 2017-04-07 | The choma fixed connection structure and its quick method for dismounting of a kind of centrifugal multistage pump multiple centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106812727A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502994A (en) * | 2020-05-12 | 2020-08-07 | 山东凯恩真空技术有限公司 | Screw vacuum pump temperature regulating device |
| CN111828370A (en) * | 2020-06-28 | 2020-10-27 | 江苏大学 | A radial seal port ring of a centrifugal pump |
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| CN111828370A (en) * | 2020-06-28 | 2020-10-27 | 江苏大学 | A radial seal port ring of a centrifugal pump |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170609 |
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| RJ01 | Rejection of invention patent application after publication |