CN117387711A - Gas Roots flowmeter, assembly tool and assembly method thereof - Google Patents
Gas Roots flowmeter, assembly tool and assembly method thereof Download PDFInfo
- Publication number
- CN117387711A CN117387711A CN202311415232.9A CN202311415232A CN117387711A CN 117387711 A CN117387711 A CN 117387711A CN 202311415232 A CN202311415232 A CN 202311415232A CN 117387711 A CN117387711 A CN 117387711A
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- China
- Prior art keywords
- holes
- shell
- rotating shafts
- wallboard
- bearing
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000001360 synchronised effect Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 210000004907 gland Anatomy 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a gas Roots flowmeter, in particular to a gas Roots flowmeter, an assembly tool and an assembly method thereof, which are used for solving the defects that the rotor component of the existing gas Roots flowmeter cannot keep an optimal working gap in actual operation, interference conditions occur, the accuracy of the gas Roots flowmeter is affected and the assembly efficiency of the existing rotor component assembly method is low. The assembly fixture of the gas Roots flowmeter comprises a fixed seat and a positioning body, can be matched with the installation of a wallboard, a synchronous gear and the like under the state that two rotors are relatively vertical, enables a plurality of parts to form a whole and to be fixed with a second shell, and can adjust the gap between the rotor parts and the wallboard through a plurality of fixing bolts so as to ensure that the rotor parts rotate along with the synchronous gear mutually and the gap is uniform without interference.
Description
Technical Field
The invention relates to a gas Roots flowmeter, in particular to a gas Roots flowmeter, an assembly tool thereof and an assembly method thereof.
Background
The structure of the gas Roots flowmeter includes a housing, a rotor component, and a measurement chamber, the rotor component including a pair of conjugated rotors disposed within a sealed measurement chamber. When gas passes through the gas Roots flowmeter, a pressure differential created between the inlet and the outlet acts on the rotor member coupled to the synchronizing gear to thereby drive the rotor member in rotation. The rotor component keeps the optimal working clearance in actual operation, and the realization of continuous non-contact sealing is a key factor influencing the accuracy of the gas Roots flowmeter, and the reasons for interference of the rotor component include initial assembly position deviation, material expansion, abrasion of the component, overlarge friction and the like. The initial assembly position deviation comprises incorrect rotor position, reverse direction and the like, and the existing rotor component assembly method is that the rotor component is manually installed into a measuring cavity and placed into the initial assembly position, and then the other components are sequentially installed. When the assembly is completed, if the initial assembly position of the rotor component has deviation, the rotation is inflexible, and even interference jamming phenomenon occurs, the relative position of the rotor component needs to be readjusted, so that the assembly efficiency is reduced.
Disclosure of Invention
The invention aims to solve the defects that the rotor component of the existing gas Roots flowmeter cannot keep an optimal working gap in actual operation, interference conditions occur, the accuracy of the gas Roots flowmeter is affected, and the assembly efficiency of the existing rotor component assembly method is low.
In order to solve the defects existing in the prior art, the invention provides the following technical solutions:
the utility model provides a gas roots flowmeter, includes first casing, wallboard, second casing and rotor part, its characterized in that:
the first shell and the wallboard are sequentially arranged at the upper end of the second shell from outside to inside, two intermeshing synchronous gears are arranged between the first shell and the wallboard, a sealed measuring cavity is formed between the wallboard and the second shell, two first through holes are formed in the top of the first shell, two second through holes are formed in the wallboard, and two mounting holes are formed in the bottom of the second shell;
the rotor component comprises two rotors positioned in a measuring cavity and two rotating shafts respectively arranged on the two rotors, wherein the upper ends of the two rotating shafts sequentially penetrate through a second through hole, an inner hole of a synchronous gear and a first through hole, a top bearing is arranged between the two rotating shafts and the two first through holes, the upper end of an outer ring of the top bearing is fixed through an inner ring of a bearing pressing plate, the outer ring of the bearing pressing plate is arranged on a first shell through a plurality of fixing bolts, a butterfly washer and a spacer sleeve are sleeved on the part, positioned between the top bearing and the synchronous gear, of the two rotating shafts from bottom to top, and a bottom bearing is arranged between the lower ends of the two rotating shafts and the two mounting holes.
Further, a magnetic steel wheel is arranged at the upper end part of one rotating shaft, and the lower end of the magnetic steel wheel is abutted with the upper end of the inner ring of the corresponding top bearing.
Further, a gland and an oil throwing piece are sequentially arranged at the end part of the upper end of the other rotating shaft from bottom to top, and the lower end of the gland is abutted with the upper end of the inner ring of the corresponding top bearing.
Meanwhile, the invention also provides an assembly fixture of the gas Roots flowmeter, which is characterized in that: comprises a fixed seat and a positioning body;
two limiting holes for limiting the lower ends of the two rotating shafts are formed in the fixing base respectively;
the locating body is internally provided with two locating through holes respectively matched with the two rotors, the two locating through holes are used for enabling the two rotors to be perpendicular to each other, the upper end of the locating body is used for being abutted to the wallboard, and the lower end of the locating body is fixed with the fixing base.
The invention also provides an assembling method of the gas Roots flowmeter, which is characterized by comprising the following steps of:
step 1, respectively installing two rotors into two positioning through holes of a positioning body, keeping the two rotors mutually perpendicular, and respectively extending the lower ends of two rotating shafts into two limiting holes;
step 2, arranging a wallboard at the upper end of the positioning body, enabling the upper ends of the two rotating shafts to respectively pass through the two second through holes, and respectively sleeving two synchronous gears at the upper ends of the two rotating shafts;
step 3, arranging a first shell on the wallboard, enabling the upper ends of the two rotating shafts to penetrate through the two first through holes respectively, arranging a top bearing between the upper ends of the two rotating shafts and the two first through holes, fixing the two bearing pressing plates on the first shell through a plurality of fixing bolts, enabling the lower ends of the inner rings of the two bearing pressing plates to be in butt joint with the upper ends of the outer rings of the two top bearings respectively, and keeping the plurality of fixing bolts in a loose state;
step 4, removing the assembly tool from the whole formed in the step 3 to obtain a combined body; the combined body is fixed with the second shell, and the clearance between the rotor component and the wallboard is adjusted by adjusting the bearing pressing plate and a plurality of fixing bolts on the first shell, so that the rotor component is ensured to rotate smoothly, and interference jamming phenomenon is avoided.
Further, in step 3, after the lower ends of the two bearing pressing plates are respectively abutted against the upper ends of the outer rings of the two top bearings and the plurality of fixing bolts are kept in a loose state, the method further comprises the following steps:
a magnetic steel wheel is arranged at the upper end part of one rotating shaft, and the lower end of the magnetic steel wheel is abutted with the upper end of the inner ring of the corresponding top bearing; the upper end part of the other rotating shaft is sequentially provided with a gland and an oil throwing piece from bottom to top, and the lower end of the gland is abutted with the upper end of the inner ring of the corresponding top bearing.
Compared with the prior art, the invention has the beneficial effects that:
the assembly fixture for the gas Roots flowmeter comprises a fixed seat and a positioning body, wherein the fixed seat and the positioning body can be assembled and matched with a wallboard, a synchronous gear and the like under the state that two rotors are relatively vertical, so that a plurality of parts form a whole and are fixed with a second shell, gaps between the rotor parts and the wallboard can be adjusted through a plurality of fixing bolts, and the rotor parts can rotate along with the step gears, and the gaps are uniform and free of interference. Compared with the prior art, the assembly efficiency is improved by 2 to 3 times by manually adjusting the matching angle of the rotor component after the rotor component is arranged in the cavity.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a gas Roots flow meter according to the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a schematic structural view of an embodiment of an assembly fixture for a gas Roots flowmeter according to the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic view of the overall structure formed in step 3 of an embodiment of a method of assembling a gas Roots flowmeter according to the present invention;
fig. 6 is a B-B cross-sectional view of fig. 5.
The reference numerals are explained as follows: 1-a first housing; 2-wallboard; 3-a second housing; 4-synchronizing gears; 5-rotor part, 51-rotor, 52-rotation axis; 6-a measurement chamber; 7-top bearings; 8-bearing press plates; 9-a bottom bearing; 10-magnetic steel wheels; 11-capping; 12-oil slinging sheets; 13-fixing bolts; 14-fixing base; 15-positioning body; 16-limiting holes; 17-positioning through holes; 18-a cylindrical pin; 19-a screw; 20-spacer bush; 21-butterfly washers.
Detailed Description
The invention is further described below with reference to the drawings and exemplary embodiments.
Referring to fig. 1 and 2, a gas roots flowmeter includes a first housing 1, a wall plate 2, a second housing 3, two synchromesh gears 4, and a rotor member 5.
The first casing 1, wallboard 2 set gradually in second casing 3 upper end from inside to outside, set up two synchromesh 4 of intermeshing between first casing 1 and the wallboard 2, form sealed measurement cavity 6 between wallboard 2 and the second casing 3, the top of first casing 1 is provided with two first through-holes, is provided with two second through-holes on the wallboard 2, and second casing 3 bottom is provided with two mounting holes.
The rotor component 5 comprises two rotors 51 positioned in the measuring cavity 6 and two rotating shafts 52 respectively arranged on the two rotors 51, wherein the upper ends of the two rotating shafts 52 sequentially penetrate through a second through hole, an inner hole of the synchronous gear 4 and a first through hole, a top bearing 7 is arranged between the two rotating shafts 52 and the two first through holes, the upper end of an outer ring of the top bearing 7 is fixed through an inner ring of a bearing pressing plate 8, the outer ring of the bearing pressing plate 8 is arranged on the first shell 1 through two fixing bolts 13, and a bottom bearing 9 is arranged between the lower ends of the two rotating shafts 52 and the two mounting holes.
The upper end of one rotating shaft 52 is provided with a magnetic steel wheel 10, and the lower end of the magnetic steel wheel 10 is abutted with the upper end of the inner ring of the corresponding top bearing 7. When the rotor 51 starts to rotate, the magnetic steel wheel 10 rotates along with it, and the permanent magnets on the magnetic steel wheel 10 generate a magnetic field when rotating, and the magnetic field can be sensed by the sensor. The measured magnetic field changes are converted into electric signals by the sensor, further processed and output to the monitoring system. By analyzing these signals, the user can acquire real-time data about the gas flow.
The upper end of the other rotary shaft 52 is provided with a pressing cover 11 and an oil throwing piece 12 from bottom to top in sequence, and the lower end of the pressing cover 11 is abutted with the upper end of the inner ring of the corresponding top bearing 7. The lubricating oil inside the gas roots flowmeter serves to reduce friction between the rotor components 5, thereby extending the life of the device and ensuring proper operation. However, if lubrication oil enters the measurement chamber 6, gas may be contaminated, affecting the accuracy of the flow measurement. The oil slinger 12, by virtue of its particular design and location, is able to effectively sling lubricating oil from the rotor component 5 to prevent it from entering the measurement chamber 6.
The part of the two rotating shafts 52 between the top bearing 7 and the synchronous gear 4 is sleeved with a butterfly washer 21 and a spacer 20 from bottom to top.
Referring to fig. 3 and 4, an assembly fixture of the gas roots flowmeter includes a fixing seat 14 and a positioning body 15.
Two limiting holes 16 for limiting the lower ends of the two rotating shafts 52 are arranged on the fixed seat 14.
Two positioning through holes 17 respectively matched with the two rotors 51 are formed in the positioning body 15, the two positioning through holes 17 are used for enabling the two rotors 51 to be perpendicular to each other, the upper end of the positioning body 15 is used for being abutted to the wallboard 2, and the lower end of the positioning body is fixed with the fixing seat 14 through two cylindrical pins 18 and four screws 19.
The assembling method of the gas Roots flowmeter adopts the assembling tool and comprises the following steps:
step 1, respectively installing two rotors 51 into two positioning through holes 17 of a positioning body 15, keeping the two rotors 51 mutually perpendicular, and respectively extending the lower ends of two rotating shafts 52 into two limiting holes 16;
step 2, arranging a wallboard 2 at the upper end of the positioning body 15, and sleeving two synchronous gears 4 at the upper ends of the two rotating shafts 52 after the upper ends of the two rotating shafts 52 respectively pass through the two second through holes;
step 3, arranging a first shell 1 on the wallboard 2, enabling the upper ends of two rotating shafts 52 to pass through the two first through holes respectively, arranging a top bearing 7 between the upper ends of the two rotating shafts 52 and the two first through holes, fixing two bearing pressing plates 8 on the first shell 1 through four fixing bolts 13, enabling the lower ends of the inner rings of the two bearing pressing plates 8 to be respectively abutted with the upper ends of the outer rings of the two top bearings 7, and keeping the four fixing bolts 13 in a loose state;
a magnetic steel wheel 10 is arranged at the upper end part of one rotating shaft 52, and the lower end of the magnetic steel wheel 10 is abutted with the upper end of the inner ring of the corresponding top bearing 7; the upper end of the other rotary shaft 52 is provided with a pressing cover 11 and an oil throwing piece 12 in sequence from bottom to top, and the lower end of the pressing cover 11 is abutted with the upper end of the inner ring of the corresponding top bearing 7, as shown in fig. 5 and 6;
step 4, removing the assembly tool from the whole formed in the step 3 to obtain a combined body; the assembly is fixed with the second shell 3, and the clearance between the rotor part 5 and the wallboard 2 is adjusted by adjusting four fixing bolts 13, so that the rotor part 5 is ensured to rotate smoothly without interference and blocking.
Claims (6)
1. A gas roots flowmeter comprising a first housing (1), a wall plate (2), a second housing (3) and a rotor member (5), characterized in that:
the first shell (1) and the wallboard (2) are sequentially arranged at the upper end of the second shell (3) from outside to inside, two synchronous gears (4) meshed with each other are arranged between the first shell (1) and the wallboard (2), a sealed measuring cavity (6) is formed between the wallboard (2) and the second shell (3), two first through holes are formed in the top of the first shell (1), two second through holes are formed in the wallboard (2), and two mounting holes are formed in the bottom of the second shell (3);
the rotor component (5) comprises two rotors (51) located in a measuring cavity (6) and two rotating shafts (52) arranged on the two rotors (51) respectively, wherein the upper ends of the two rotating shafts (52) sequentially penetrate through a second through hole, an inner hole of a synchronous gear (4) and a first through hole, a top bearing (7) is arranged between the two rotating shafts (52) and the two first through holes, the upper end of an outer ring of the top bearing (7) is fixed through an inner ring of a bearing pressing plate (8), the outer ring of the bearing pressing plate (8) is arranged on a first shell (1) through a plurality of fixing bolts (13), a butterfly washer (21) and a spacer sleeve (20) are sleeved on the part of the two rotating shafts (52) between the top bearing (7) and the synchronous gear (4) from bottom to top, and a bottom bearing (9) is arranged between the lower end of the two rotating shafts (52) and the two mounting holes.
2. A gas roots flowmeter according to claim 1, wherein: the upper end part of one rotating shaft (52) is provided with a magnetic steel wheel (10), and the lower end of the magnetic steel wheel (10) is abutted with the upper end of the inner ring of the corresponding top bearing (7).
3. A gas roots flowmeter according to claim 1 or claim 2, wherein: the upper end part of the other rotating shaft (52) is sequentially provided with a pressing cover (11) and an oil throwing piece (12) from bottom to top, and the lower end of the pressing cover (11) is abutted with the upper end of the inner ring of the corresponding top bearing (7).
4. An assembly fixture for a gas roots flowmeter according to claim 1, wherein: comprises a fixed seat (14) and a positioning body (15);
two limiting holes (16) for limiting the lower ends of the two rotating shafts (52) are formed in the fixed seat (14);
two positioning through holes (17) which are respectively matched with the two rotors (51) are formed in the positioning body (15), the two positioning through holes (17) are used for enabling the two rotors (51) to be perpendicular to each other, the upper end of the positioning body (15) is used for being abutted to the wallboard (2), and the lower end of the positioning body is fixed with the fixing seat (14).
5. A method of assembling a gas roots flowmeter according to claim 1, wherein the assembly fixture of claim 4 is used, comprising the steps of:
step 1, respectively installing two rotors (51) into two positioning through holes (17) of a positioning body (15), keeping the two rotors (51) mutually perpendicular, and respectively extending the lower ends of two rotating shafts (52) into two limiting holes (16);
step 2, arranging a wallboard (2) at the upper end of the positioning body (15), enabling the upper ends of the two rotating shafts (52) to respectively pass through the two second through holes, and respectively sleeving two synchronous gears (4) at the upper ends of the two rotating shafts (52);
step 3, arranging a first shell (1) on the wallboard (2), enabling the upper ends of the two rotating shafts (52) to penetrate through the two first through holes respectively, arranging a top bearing (7) between the upper ends of the two rotating shafts (52) and the two first through holes, fixing the two bearing pressing plates (8) on the first shell (1) through a plurality of fixing bolts (13), enabling the lower ends of the inner rings of the two bearing pressing plates (8) to be in butt joint with the upper ends of the outer rings of the two top bearings (7) respectively, and keeping a plurality of fixing bolts (13) in a loose state;
step 4, removing the assembly tool from the whole formed in the step 3 to obtain a combined body; the combined body is fixed with the second shell (3), and gaps between the rotor component (5) and the wallboard (2) are adjusted through adjusting the bearing pressing plate (8) and the fixing bolts (13) on the first shell (1), so that the rotor component (5) is ensured to rotate smoothly without interference and blocking.
6. The method of assembling a gas roots flowmeter of claim 5, wherein: in step 3, after the lower ends of the two bearing pressing plates (8) are respectively abutted against the upper ends of the outer rings of the two top bearings (7) and the plurality of fixing bolts (13) are kept in a loose state, the method further comprises the following steps:
a magnetic steel wheel (10) is arranged at the upper end part of one rotating shaft (52), and the lower end of the magnetic steel wheel (10) is abutted with the upper end of the inner ring of the corresponding top bearing (7); the upper end part of the other rotating shaft (52) is sequentially provided with a gland (11) and an oil throwing piece (12) from bottom to top, and the lower end of the gland (11) is abutted with the upper end of the inner ring of the corresponding top bearing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311415232.9A CN117387711A (en) | 2023-10-27 | 2023-10-27 | Gas Roots flowmeter, assembly tool and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311415232.9A CN117387711A (en) | 2023-10-27 | 2023-10-27 | Gas Roots flowmeter, assembly tool and assembly method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117387711A true CN117387711A (en) | 2024-01-12 |
Family
ID=89471685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311415232.9A Pending CN117387711A (en) | 2023-10-27 | 2023-10-27 | Gas Roots flowmeter, assembly tool and assembly method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117387711A (en) |
-
2023
- 2023-10-27 CN CN202311415232.9A patent/CN117387711A/en active Pending
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