CN114562481A - Single-stage middle-opened volute type double-suction centrifugal pump and cavity machining process thereof - Google Patents
Single-stage middle-opened volute type double-suction centrifugal pump and cavity machining process thereof Download PDFInfo
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- CN114562481A CN114562481A CN202210041346.0A CN202210041346A CN114562481A CN 114562481 A CN114562481 A CN 114562481A CN 202210041346 A CN202210041346 A CN 202210041346A CN 114562481 A CN114562481 A CN 114562481A
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- 238000003754 machining Methods 0.000 title claims description 18
- 238000007789 sealing Methods 0.000 claims abstract description 76
- 238000012545 processing Methods 0.000 claims abstract description 44
- 238000005516 engineering process Methods 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 238000003672 processing method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000695274 Processa Species 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 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
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a single-stage middle-open volute type double-suction centrifugal pump and a cavity processing technology thereof
The number of the sealing bodies is 2, and the sealing bodies are respectively arranged on two sides of the pump body and two sides of the pump cover
In the hole, the sealing ring is arranged on the contact surface of the sealing body, the pump body and the pump cover. The centrifugal pump is divided into a pump body, a pump cover and a pump cover by the original centrifugal pump consisting of the pump body and the pump coverThereby the structure that the seal three makes up into centrifugal pump makes the aperture that pump body and pump cover combination back lateral wall formed be greater than the inside aperture of treating the processing hole of cavity, and the processing in the cavity inside hole of being convenient for can the visual observation course of working, adds labour saving and time saving man-hour, and it is convenient to measure the size, and production cycle is short, and production efficiency is high, improves product quality.
Description
Technical Field
The invention belongs to the technical field of fluid machinery, and particularly relates to a single-stage middle-open volute type double-suction centrifugal pump and a cavity machining process thereof.
Background
The single-stage split volute type double-suction centrifugal pump has a simple structure, is convenient to maintain and is very widely applied. The suction inlet and the discharge outlet of the single-stage split volute type double-suction centrifugal pump are both positioned on the pump body, the flow range is from dozens of cubic meters per hour to tens of thousands of cubic meters per hour, and the lift is from dozens of meters to two hundred meters below the axial line of the water pump. The single-stage middle-open volute type double-suction centrifugal pump is suitable for the fields of water supply plants, water supply and drainage pump stations, ferrous metallurgy enterprises, petrochemical industry oil refining, papermaking, oil fields, agricultural irrigation, power plants, industrial water supply systems, large hydraulic engineering and the like, is wide in application and very large in market demand, and is time-consuming and labor-consuming in processing, long in production period, low in production efficiency and difficult in quality guarantee.
As shown in figure 1, the existing single-stage middle-open volute type double-suction centrifugal pump cavity consists of a traditional pump body 1 and a traditional pump cover 2, the joint surface is a middle-open surface, blank pieces of the traditional pump body 1 and the traditional pump cover 2 are casting parts, and the drawing shows that
The hole 5 is located inside the cavity,
the hole 5 is used for mounting a pump body sealing ring,
the holes 6 are positioned at the two sides of the cavity,
the hole 6 is used for installing a mechanical seal or a packing seal, and
the diameter of the holes 6 is smaller than
The diameter of the holes 5. Machining of traditional centrifugal pump cavity structure
A hole 5 and
for the boring machine to be equipped with the boring machine support 3 for the hole 6, the boring bar 4 is supported between the spindle and the boring machine support 3, particularly during machining
During the size of hole 5, processing each time must remove traditional pump cover 2 earlier, then alone to traditional pump body 1 carry out tool setting, measurement size, move back the sword, then install traditional pump cover 2, after having installed traditional pump cover 2, could be right
The holes 5 are processed in such a way that the processing is repeated, and because the processing process cannot be seen from the outside, whether the processing is finished each time can be judged only by sound, and finally, the processing is carried out for a plurality of times
The size of the holes 5 is up to the requirements. In the measurement
When the hole 5 is formed, the traditional pump cover 2 must be removed, the central line position of the traditional pump body 1 can be measured only by using a vernier caliper, and the central line of the boring rod 4 is coincided with the central line of the single-stage double-suction middle-open centrifugal pump, so that the measurement is carried out
The size is not easy to measure accurately, and the operator is required to have high experience and capability to ensure
The size of the holes 5 is accurate.
Disclosure of Invention
The invention aims to provide a novel single-stage middle-open volute type double-suction centrifugal pump, the pump body is simple and efficient to process, and the problems of time and labor waste, long production period, low production efficiency, difficult quality guarantee and the like during processing can be solved.
The technical scheme adopted by the invention is as follows: the single-stage middle-open volute type double-suction centrifugal pump comprises a pump body, a pump cover and a sealing body, wherein the pump body is connected with the pump cover through a stud assembly, the pump cover is positioned on the upper portion of the pump body, and the connecting parts of the two sides of the pump body and the two sides of the pump cover form a structure
The number of the sealing bodies is 2, and the sealing bodies are respectively arranged on two sides of the pump body and two sides of the pump cover
In the hole, the sealing ring is arranged on the contact surface of the sealing body, the pump body and the pump cover.
Preferably, the joint of the two sides of the pump body and the pump cover forms
The diameter of the hole is larger than that of the cavity formed by the pump body and the pump cover
The diameter of the pores, i.e.
Is greater than
The effect is as follows: the pump body and the pump cover are conveniently machined inside the cavity, the cutter bar can directly go deep into the cavity, and the boring cutter machining process can be seen.
Preferably, the seal is a cast annular body having an outer diameter equal to
The excircle of the sealing body is processed with a sealing ring mounting groove, and an annular inner hole of the sealing body is processed into
The holes are arranged in the upper part of the shell,
the hole is connected with the outer circle side wall of the sealing body into a whole through the cambered surface.
The effect is as follows: the sealing body is an independent structural body, is convenient to process, can be processed on a common horizontal lathe, can ensure the processing quality, and is assembled with the pump body and the pump cover after being processed, so that the efficiency is improved.
Preferably, on the pump body
The hole wall of the hole is provided with a pump body sealing ring positioning groove which is matched with a pump body sealing ring, and the pump body is provided with a pump body
And a sealing body positioning groove is processed on the wall of the hole and is matched with the sealing body.
The effect is that: the positioning device is used for positioning the sealing body and the sealing ring of the pump body, and is convenient to quickly and accurately position.
The invention also comprises a processing technology of the single-stage middle-open volute type double-suction centrifugal pump cavity, which comprises the following steps:
step 1, pump body processing: respectively processing a bottom plane and a middle opening plane of the cast pump body blank on a vertical lathe, and drilling a pump body pump cover handle closing hole on a drilling machine;
step 2, pump cover processing: opening the surface of the cast pump cover blank in vertical lathe machining, and drilling a pump body and a pump cover handle hole in a drilling machine;
step 3, sealing body processing: processing the cast sealing body blank on a common horizontal lathe
A hole,
The outer circle and the outer circle side wall;
step 4, combining the pump body and the pump cover into a whole by using a stud nut assembly, fixedly installing the pump body and the pump cover on a boring machine workbench, installing a cutter bar on a boring machine cutter head, and installing a boring cutter on the cutter bar;
step 4.1, processing the T end face: adjusting the initial position of the cutter bar to enable the end surface of the cutter head to be in contact with the T-shaped end surface, wherein the cutter bar rotates by taking the center line of a boring machine spindle as the circle center, and meanwhile, the cutter bar moves radially in a T-shaped groove of a cutter head;
step 4.2, processing
Hole: the cutter bar extends into the cavity formed by the pump body and the pump cover, rotates by taking the center line of the boring machine spindle as the circle center, moves left and right on the boring machine workbench, and is subjected to rough machining
Measuring by a caliper in hole time, and measuring by an inside micrometer in the last time;
step 4.3, processing
Hole: the cutter bar is positioned at one side of the pump body and the pump cover
At the hole, the cutter bar rotates by taking the center line of the boring machine spindle as the center of a circle, and the boring machine tool simultaneouslyThe working platform moves left and right for rough machining
Measuring by a caliper in hole time, and measuring by an inside micrometer in the last time;
and 6, assembling the machined pump cover, the pump body, the sealing body and the sealing ring into a whole.
Preferably, the tool bar is coaxial with the boring tool in step 4.1.
The effect is as follows: the processed T-shaped end face is ensured to be vertically contacted with the boring cutter, and the processing process is convenient to control.
Preferably, in the step 4.2, the boring cutter is perpendicular to the cutter bar, and the distance between the cutter head of the boring cutter and the central line of the spindle of the boring lathe is equal to 0.5 time
The effect is as follows: the boring cutter rotates along with the cutter bar around the center line of the boring machine spindle, and the diameter of the rotating circle is
I.e. the machined hole is exactly the design requirement size.
Preferably, in step 4.3, the boring cutter is perpendicular to the cutter bar, and the distance between the cutter head of the boring cutter and the center line of the spindle of the boring lathe is equal to 0.5 times
The effect is as follows: the boring cutter rotates along with the cutter bar around the center line of the boring machine spindle, and the diameter of the rotating circle is
I.e. the machined hole is exactly the design requirement size.
The invention has the beneficial effects that: according to the invention, the original centrifugal pump consisting of the pump body and the pump cover is split into the pump body, and the pump cover and the sealing body are combined into the centrifugal pump, so that the aperture formed by the side wall after the pump body and the pump cover are combined is larger than the aperture of the hole to be processed in the cavity, the processing of the hole in the cavity is facilitated, the length of the cutter bar cantilever is small, the cutter bar can conveniently enter the cavity, the processing process can be visually observed, the time and labor are saved during processing, the size measurement is convenient, the production period is short, the production efficiency is high, and the product quality is improved.
Drawings
FIG. 1 is a schematic structural diagram of a conventional single-stage split volute type double-suction centrifugal pump;
FIG. 2 is a schematic structural section view of a single-stage split volute type double-suction centrifugal pump;
FIG. 3 is a cross-sectional view of a single-stage split volute type double-suction centrifugal pump when a T-end surface is machined;
FIG. 4 shows the single-stage middle-open volute type double-suction centrifugal pump processing
A schematic cross-sectional view of a hole;
FIG. 5 shows the single-stage middle-open volute type double-suction centrifugal pump processing
Schematic cross-sectional view of the hole.
Reference numerals: 1-traditional pump body, 2-traditional pump cover, 3-boring machine support, 4-boring bar,
the holes are arranged in the upper part of the shell,
the holes are arranged in the upper part of the shell,
the sealing structure comprises a hole, 8-a pump body, 9-a pump cover, 10-a sealing body, 11-a sealing ring, 12-a cutter rod, 13-a boring cutter, 14-a T end face, 81-a pump body sealing ring positioning groove, 82-a sealing body positioning groove and 101-a sealing ring mounting groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First the letter designations appearing herein are explained,
is the name of the hole or holes,
the dimensions indicate the diameter of the hole, H7 indicates
The dimensional tolerance of (2).
The hole 5 is used for mounting a pump body sealing ring.
Is the name of the hole or holes,
the dimensions indicate the diameter of the hole, H7 indicates
The dimensional tolerance of (2).
The hole 7 is used for mounting the sealing body 10.
Is the name of the hole or holes,
the dimensions indicate the diameter of the hole, H7 indicates
The dimensional tolerance of (2).
The hole 6 is used for mounting a mechanical seal or a packing seal, wherein,
the T end face 14 is formed by the side faces of the pump body 8 and the pump cover 9
The outer end face of the bore 7.
As shown in figure 2, the single-stage middle-open volute type double-suction centrifugal pump comprises a pump body 8, a pump cover 9 and a sealing body 10, wherein the pump body 8 is connected with the pump cover 9 through a stud assembly, the pump cover 9 is positioned on the upper portion of the pump body 8, and the connecting positions of the two sides of the pump body 8 and the two sides of the pump cover 9 form a structure
The number of the holes 7 and the sealing bodies 10 is 2, and the sealing bodies are respectively arranged on two sides of the pump body 8 and the pump cover 9 to form two
In the hole 7, a sealing ring 11 is arranged on the contact surface of the sealing body 10 with the pump body 8 and the pump cover 9. The joint of the two sides of the pump body 8 and the pump cover 9 forms
The diameter of the hole 7 is larger than that of the cavity formed by the pump body 8 and the pump cover 9
The diameter of the holes 5, i.e.
Is greater than
The seal 10 is a ring cast part with an outer diameter equal to
The outer circle of the sealing body 10 is processed with a sealing ring mounting groove 101, and the annular inner hole of the sealing body 10 is processed into
The holes (6) are arranged in the groove,
the hole 6 is connected with the outer circle side wall of the sealing body 10 into a whole through a cambered surface. As shown in fig. 3, on the pump body 8
A pump body sealing ring positioning groove 81 is processed on the hole wall of the hole 5, the pump body sealing ring positioning groove 81 is matched with a pump body sealing ring, and the pump body 8 is provided with a pump body
The hole wall of the hole 7 is provided with a sealing body positioning groove 82, the sealing body positioning groove 82 is matched with the sealing body 10, the outer circle of the sealing body 10 is provided with an arc bulge matched with the sealing body in shape, and when the sealing body 10 is assembled with the pump body 8, the arc bulge of the sealing body 10 is just embedded into the sealing body positioning groove 82.
The invention also comprises a processing technology of the single-stage middle-open volute type double-suction centrifugal pump cavity, which comprises the following steps:
step 1, pump body 8 processing: respectively processing a bottom plane and a middle opening plane of the cast pump body blank on a vertical lathe, and drilling a pump body pump cover handle closing hole on a drilling machine;
step 2, pump cover 9 processing: opening the surface of the cast pump cover blank in vertical lathe machining, and drilling a pump body and a pump cover handle hole in a drilling machine;
step 3, processing the sealing body 10: processing the cast sealing body blank on a common horizontal lathe
A hole,
The outer circle and the outer circle side wall;
step 4, combining the pump body 8 and the pump cover 9 into a whole by using a stud nut assembly, fixedly installing the pump body and the pump cover on a boring machine workbench, installing a cutter bar 12 on a boring machine cutter head, and installing a boring cutter 13 on the cutter bar 12;
step 4.1, machining the T end face 14: as shown in fig. 3, adjusting the initial position of the cutter bar 12, installing a boring cutter 13 special for machining a T-shaped end face 14, contacting the end face of the cutter head with the T-shaped end face 14, wherein the cutter bar 12 is coaxial with the boring cutter 13, the cutter bar 12 rotates around the center line of the boring machine spindle, and the cutter bar 12 moves radially in a T-shaped groove of a cutter head;
step 4.2, processing
Hole 5: as shown in fig. 4, mounting process
A boring cutter 13 special for the hole 5, a cutter bar 12 extends into an initial position to be processed in a cavity formed by the pump body 8 and the pump cover 9, the boring cutter 13 is vertical to the cutter bar 12, and the distance between the cutter head of the boring cutter 13 and the center line of the spindle of the boring machine is equal to 0.5 time
The cutter bar 12 rotates by taking the center line of the boring machine main shaft as the circle center, and the boring machine workbench moves left and right at the same time, so that rough machining is carried out
The hole 5 is measured by a caliper, the last hole is measured by an inside micrometer, the lathe bed is moved during measurement, and the inside micrometer is used for measurement, so that the measurement is convenient and accurate;
step 4.3, processing
Hole 7: as shown in fig. 5, mounting process
A boring cutter 13 special for the hole 7, and a cutter bar 12 positioned at one side of the pump body 8 and the pump cover 9
At the position of the hole 7, the boring cutter 13 is vertical to the cutter bar 12, and the distance between the cutter head of the boring cutter 13 and the center line of the spindle of the boring lathe is equal to 0.5 time
The cutter bar 12 rotates by taking the center line of the boring machine main shaft as the center of a circle, and the boring machine worktable moves left and right at the same time, thus rough machining is carried out
The measuring is carried out by using a caliper, the measuring is carried out by using an inside micrometer in the last cut, the lathe bed is moved during the measuring, and the measuring is carried out by using the inside micrometer, so that the measuring is convenient and accurate;
and 6, assembling the machined pump cover 8, the pump body 9, the sealing body 10 and the sealing ring 11 into a whole.
The above description is the specific embodiment of the present invention and the technical principle applied, and any modification and equivalent transformation based on the technical solution of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a single-stage middle-open volute type double entry centrifugal pump which characterized in that: the pump comprises a pump body, a pump cover and a sealing body, wherein the pump body and the pump cover are connected through a stud assembly, the pump cover is positioned on the upper portion of the pump body, and the connecting parts of the two sides of the pump body and the two sides of the pump cover form a structure
The number of the sealing bodies is 2, and the sealing bodies are respectively arranged on two sides of the pump body and two sides of the pump cover
In the hole, the sealing ring is arranged on the contact surface of the sealing body, the pump body and the pump cover.
2. The single-stage split volute double-suction centrifugal pump of claim 1, wherein: the joint of the two sides of the pump body and the pump cover is formed
The diameter of the hole is larger than that of the cavity formed by the pump body and the pump cover
The diameter of the pores, i.e.
Is greater than
3. The single-stage split volute double-suction centrifugal pump of claim 1, wherein: the sealing body is a circular ring casting part, and the diameter of the outer circle is equal to that of the outer circle
The excircle of the sealing body is processed with a sealing ring mounting groove, and the annular inner hole of the sealing body is processed into
The holes are arranged in the upper part of the shell,
the hole is connected with the outer circle side wall of the sealing body into a whole through the cambered surface.
4. The single-stage split volute double-suction centrifugal pump of claim 1, wherein: on the pump body
The hole wall of the hole is provided with a pump body sealing ring positioning groove which is matched with a pump body sealing ring, and the pump body is provided with a pump body
And a sealing body positioning groove is processed on the wall of the hole and is matched with the sealing body.
5. A processing technology for a single-stage middle-open volute type double-suction centrifugal pump cavity is characterized by comprising the following steps:
step 1, pump body processing: respectively processing a bottom plane and a middle opening plane of the cast pump body blank on a vertical lathe, and drilling a pump body pump cover handle closing hole on a drilling machine;
step 2, pump cover processing: opening the surface of the cast pump cover blank in vertical lathe machining, and drilling a pump body and a pump cover handle hole in a drilling machine;
step 3, sealing body processing: processing the cast sealing body blank on a common horizontal lathe
A hole,
The outer circle and the outer circle side wall;
step 4, combining the pump body and the pump cover into a whole by using a stud nut assembly, fixedly installing the pump body and the pump cover on a boring machine workbench, installing a cutter bar on a boring machine cutter head, and installing a boring cutter on the cutter bar;
step 4.1, machining the T end face: adjusting the initial position of the cutter bar to enable the end surface of the cutter head to be in contact with the T-shaped end surface, wherein the cutter bar rotates by taking the center line of a boring machine spindle as the circle center, and meanwhile, the cutter bar moves radially in a T-shaped groove of a cutter head;
step 4.2, processing
Hole (b): the cutter bar extends into the cavity formed by the pump body and the pump cover, rotates by taking the center line of the boring machine spindle as the circle center, moves left and right on the boring machine workbench, and is subjected to rough machining
Measuring by a caliper in hole time, and measuring by an inside micrometer in the last time;
step 4.3, processing
Hole: the cutter bar is positioned at one side of the pump body and the pump cover
At the hole, the cutter bar rotates by taking the center line of the boring machine main shaft as the circle center, and the boring machine worktable moves left and right at the same time, and rough machining is carried out
Measuring by a caliper in hole time, and measuring by an inside micrometer in the last time;
step 5, rotating the workbench by 180 degrees, and repeating the steps 4.1-4.3 to process the other side;
and 6, assembling the machined pump cover, the pump body, the sealing body and the sealing ring into a whole.
6. The method for processing the cavity of the single-stage split volute type double-suction centrifugal pump according to claim 5, wherein: and 4.1, enabling the cutter bar to be coaxial with the boring cutter.
7. The sheet of claim 5The processing method of the cavity of the split volute double-suction centrifugal pump is characterized in that: in the step 4.2, the boring cutter is vertical to the cutter bar, and the distance between the cutter head of the boring cutter and the central line of the spindle of the boring lathe is equal to 0.5 time
8. The method for processing the cavity of the single-stage split volute type double-suction centrifugal pump according to claim 5, wherein: in the step 4.3, the boring cutter is vertical to the cutter bar, and the distance between the cutter head of the boring cutter and the center line of the spindle of the boring lathe is equal to 0.5 time
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| CN202210041346.0A CN114562481B (en) | 2022-01-14 | 2022-01-14 | Single-stage middle-opening volute type double-suction centrifugal pump cavity machining process |
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| CN202210041346.0A CN114562481B (en) | 2022-01-14 | 2022-01-14 | Single-stage middle-opening volute type double-suction centrifugal pump cavity machining process |
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| CN114562481B CN114562481B (en) | 2024-01-09 |
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| CN209294060U (en) * | 2019-01-09 | 2019-08-23 | 北京京海人机电泵控制设备有限公司 | A kind of efficient axis-open-type double entry pump |
| CN111878409A (en) * | 2020-08-26 | 2020-11-03 | 安德里茨（中国）有限公司 | Double-suction split pump and manufacturing method thereof |
| CN213711343U (en) * | 2020-12-10 | 2021-07-16 | 浙江同济科技职业学院 | Double-suction middle-open centrifugal pump |
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| CN114562481B (en) | 2024-01-09 |
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