CN108827413B - Roots flowmeter - Google Patents
Roots flowmeter Download PDFInfo
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- CN108827413B CN108827413B CN201810650786.XA CN201810650786A CN108827413B CN 108827413 B CN108827413 B CN 108827413B CN 201810650786 A CN201810650786 A CN 201810650786A CN 108827413 B CN108827413 B CN 108827413B
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- 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
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- Measuring Volume Flow (AREA)
Abstract
The invention discloses a Roots flowmeter, which consists of a gas flow volume corrector, a gauge outfit and a metering chamber; the gas flow volume corrector is connected with the metering chamber through a bracket; the gauge head is connected with the metering chamber; the gas flow volume corrector is formed by hermetically connecting a front cover and a rear cover, wherein a hinge is arranged between the front cover and the rear cover, and four corners of the front cover and four corners of the rear cover are fixed into a whole through four screws. The structural connection relationship of the shell and the movement can be realized no matter the shell is in an upper-in lower-out mode or in a left-in right-out mode, and the installation is convenient; through the design of the oil outlet hole, oil discharge is very convenient during maintenance; independent mechanical design, need not whole table return the factory when the maintenance, just can online maintenance, pull down the core, more the new core can (new core is good at the factory mark), the maintenance can of factory can be taken back to bad core.
Description
Technical Field
The invention relates to the field of flowmeters, in particular to a Roots flowmeter.
Background
The Roots flowmeter is also called as a waist wheel flowmeter and is mainly used for a high-precision metering instrument for continuously or intermittently measuring the gas flow in a closed pipeline. The waist wheel flowmeter has the characteristics of high precision, good reliability, light weight, long service life, low running noise, convenient installation and use and the like, can indicate accumulated flow, instantaneous flow, single flow and the like on site, and can also output pulse signals, 4-20mA or 1-5V analog signals, 485 communication, 4-20mA + HART, MODBUS protocols and the like. The waist wheel flowmeter is composed of a metering chamber, a metering rotor, a metering component assembly (namely an internal measuring element), a counting indication assembly and the like. A metering chamber is arranged in a shell of the waist wheel flowmeter, one or two pairs of waist wheels (actually gears with the number of teeth of 2) which can rotate tangentially are arranged in the metering chamber, a pair of driving gears are coaxially arranged outside the flowmeter shell and the two waist wheels, and the driving gears are meshed with each other to enable the two waist wheels to be linked with each other. Roots meters use mechanical measuring elements to continuously divide the gas into individual known volume portions and measure the total volume of flow based on the number of times the metering chamber is successively and repeatedly filled and drained with portions of the volume. When the measured fluid flows through the gasometer, the dynamic pressure of the gas enables a differential pressure to be formed between the inlet and the outlet to push the waist wheel to rotate, when the gas pushes the waist wheel on the first shaft to rotate anticlockwise, the driving gear connected with the gas drives the waist wheel on the second shaft to rotate clockwise, after the waist wheel rotates 90 degrees, the upper waist wheel is pushed by the gas to rotate clockwise, and the driving gear drives the lower waist wheel to rotate anticlockwise; when the waist wheel rotates 360 degrees, fluid which is four times of the effective volume of the metering chamber is discharged out of the flowmeter. In this way, the two pulleys are alternately driven to rotate, and gas is continuously discharged out of the flowmeter through the metering chamber along with the rotation of the pulleys. The volume of gas discharged by the waist wheel in each revolution is a fixed value, namely the discharge amount is in direct proportion to the revolution of the waist wheel shaft, and the revolution number is transmitted to the calculation display part after being decelerated through the waist wheel shaft and other transmission mechanisms. The working principle of the waist wheel flowmeter determines that the flowmeter has higher precision and lower starting flow rate as long as the matching clearance design and the assembly of the inside of the metering chamber are reasonable, the characteristic is very important in the gas metering of industrial and civil communities, the metering precision of residents during normal gas consumption is met, and the incapability of small gas flow rate of other types of flow juice to residents during low peak gas consumption is overcome.
The existing Roots meter has limitation on the installation direction, and an installer can easily rework due to wrong installation direction. In addition, the whole machine needs to be replaced during maintenance, and the meter needs to be calibrated on the spot, so that time and labor are wasted; after returning to the factory, oil discharge is also troublesome.
Contents of the invention
In order to solve the technical problem, the invention provides the Roots flowmeter, which solves the problems that a machine core can be independently maintained and oil feeding and oil unloading are inconvenient, and the Roots flowmeter can be conveniently installed no matter whether the Roots flowmeter is in an upper-in and lower-out mode or in a left-in and right-out mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
a Roots flowmeter comprises a gas flow volume corrector, a meter head and a metering chamber; the gas flow volume corrector is connected with the metering chamber through a bracket; the gauge head is connected with the metering chamber;
the gas flow volume corrector is formed by hermetically connecting a front cover and a rear cover, a hinge is arranged between the front cover and the rear cover, four corners of the front cover and four corners of the rear cover are fixed into a whole through four screws, and a display screen is arranged in the front cover; the PLC is connected in the rear cover and is connected with a power supply and a display screen, and the rear cover is connected with a plurality of interfaces;
a first interface of the gas flow volume corrector is connected with the gauge head through a first cable, acquires a pulse signal, and converts the pulse signal into a flow signal after electronic processing;
a second interface of the gas flow volume corrector is connected with a pressure sensor of the metering chamber through a second cable and is used for collecting a pressure value of the metering chamber; a third port of the gas flow volume corrector is connected with the temperature sensor of the metering chamber through a third cable and is used for collecting the temperature value of the metering chamber;
a counter is arranged in the gauge head;
the metering chamber consists of a shell, a machine core, a front cover plate and a rear cover plate;
the shell is a rectangular body, and a hollow round shaft-shaped metering chamber is arranged in the shell; the metering chamber is provided with two mounting ports which are respectively positioned on two opposite surfaces of the shell; the metering chamber is also provided with a first air inlet and a first air outlet, the first air inlet and the first air outlet are respectively positioned on the other two opposite surfaces of the shell, and the central lines of the two mounting ports are vertical to the central lines of the first air inlet and the first air outlet; one of the other two opposite surfaces of the shell is provided with an indicator for indicating the installation direction of the first air inlet and the first air outlet; an upper clamping interface and a lower clamping interface are axially arranged on the inner wall of the metering chamber;
the machine core comprises an inner shell, the inner shell is in a hollow tubular shape, and a second air inlet and a second air outlet are arranged on the wall of the inner shell in the radial direction; the tube wall of the inner shell is axially provided with a first oil through hole and a second oil through hole in a penetrating manner, the first oil through hole and the second oil through hole are respectively positioned above and below the inner shell, and the inner shell is provided with a left raised head and a right raised head;
a rotor is clamped in the inner shell, and a first shaft hole and a second shaft hole are formed in the rotor;
the two ends of the inner shell are respectively connected with a left wall plate and a right wall plate in a sealing mode, the left wall plate and the right wall plate are both groove-shaped and consistent in structure, and the left wall plate and the right wall plate are respectively connected with the front cover plate and the rear cover plate in a sealing mode and serve as oil tanks; a third oil through hole and a fourth oil through hole are formed in the left wall plate, and a fifth oil through hole and a sixth oil through hole are formed in the right wall plate; the first oil through hole, the third oil through hole and the fifth oil through hole correspond to each other and are communicated with each other to form an upper oil through hole; the second oil through hole, the fourth oil through hole and the sixth oil through hole correspond to each other and are communicated with each other to form a lower oil through hole; the middle parts of the left and right wall plates are respectively provided with a third shaft hole, a fourth shaft hole, a fifth shaft hole and a sixth shaft hole;
the first transmission shaft is connected with the first shaft hole, the third shaft hole and the fifth shaft hole in a penetrating manner;
the second transmission shaft is connected with the second shaft hole, the fourth shaft hole and the sixth shaft hole in a penetrating manner;
one end of the first transmission shaft and one end of the second transmission shaft are respectively provided with an oil throwing sheet, a bearing gland and a bearing in turn from outside to inside; the oil throwing sheet, the bearing gland and the bearing are all positioned in the groove of the left wall plate, and the transmission gear is arranged on the first transmission shaft and positioned in front of the oil throwing sheet;
the other ends of the first transmission shaft and the second transmission shaft are respectively provided with an oil throwing sheet, a driven gear, a bearing gland and a bearing from outside to inside in sequence; the two driven gears are meshed with each other; get rid of oil piece, driven gear, bearing gland, bearing all are located the right wallboard.
The machine core is sleeved in the outer shell, the left raised head and the right raised head of the machine core are respectively assembled on two sides of the upper clamping port and the lower clamping port of the inner shell, and the first air inlet and the first air outlet correspond to the second air inlet and the second air outlet;
the front cover plate is provided with an oil filling hole and an oil window; the rear cover plate is provided with an oil filling hole and an oil window; the oil filling hole is arranged above the oil filling hole, and the oil window is arranged below the oil filling hole;
the oil filling hole is arranged corresponding to the upper oil through hole, and the oil window is arranged corresponding to the lower oil through hole; the oil window is used for observing the oil filling amount;
the amount of fuel added from the filler hole is: preferably, the oil throwing sheet is contacted with the lowest part of the oil throwing sheet by 1mm-10 mm;
therefore, the pressure difference is formed between the air inlet and the air outlet, the rotor is pushed, the pinion on the transmission shaft is rotated, and the counter in the meter head is driven to change.
Furthermore, the PLC is connected with a GPS module and a Bluetooth module and used for data exchange and realizing remote operation.
Furthermore, the power supply adopts a battery, and the battery is fixed through a battery seat.
Further, the hollow tubular shape of the inner shell is: the middle part is oval, and the upper end and the lower end are respectively provided with a raised head which is matched with the shape of the rotor.
Further, the upper and lower clip interfaces are symmetrical about a center line a of the inner case.
Furthermore, the shape of the upper clamping interface is an inverted bowl shape.
Furthermore, the shape of the lower clamping interface is in a circular arc shape.
Furthermore, one side of the indicator is provided with three labeling positions, and the labeling positions are provided with a temperature-sensitive interface, a pressure-sensitive interface and a pressure-taking interface during verification in a one-to-one correspondence mode.
Furthermore, four mounting holes are formed in the peripheries of the air inlet and the air outlet and are evenly distributed on the circumference.
Furthermore, the opening ends of the left wall plate and the right wall plate are respectively provided with a sealing ring groove.
Has the advantages that: the structural connection relationship of the shell and the movement can be realized no matter the shell is in an upper-in lower-out mode or in a left-in right-out mode, and the installation is convenient; through the design of the oil outlet hole, oil discharge is very convenient during maintenance; independent mechanical design, need not whole table return the factory when the maintenance, just can online maintenance, pull down the core, more the new core can (new core is good at the factory mark), the maintenance can of factory can be taken back to bad core.
Drawings
FIG. 1 is a perspective view of a Roots flow meter of the present invention;
FIG. 2 is a front view of a Roots flow meter of the present invention;
FIG. 3 is a schematic view of an open configuration of the gas flow volume corrector of the present invention;
FIG. 4 is a left-in and right-out gas state diagram of a Roots flowmeter of the present invention;
FIG. 5 is a top-in-bottom out gas flow diagram of a Roots flowmeter of the present invention;
FIG. 6 is a schematic view of the oil filler hole above and the oil window below with the gas left in and right out of FIG. 4;
FIG. 7 is a schematic view of the upper portion of the filler opening and the lower portion of the oil window of FIG. 5 with the gas moving in and out;
FIG. 8 is a partial schematic view of the oil filler hole above and the oil window below with gas left in and right out;
FIG. 9 is a partial schematic view of the oil filler hole above and the oil window below with gas up and down;
FIG. 10 is a perspective view of the housing of the present invention;
FIG. 11 is a front view of the housing of the present invention;
FIG. 12 is a perspective view of an inner shell of the present invention;
FIG. 13 is a front view of the inner housing of the present invention;
figure 14 is a right side elevational view of a cartridge according to the present invention;
figure 15 is a left side elevational view of the cartridge of the present invention;
figure 16 is a front view of the cartridge of the present invention;
figure 17 is an exploded view of a cartridge according to the present invention;
figure 18 is a perspective view of a movement according to the present invention.
Shown in the figure: the gas flow volume corrector 100, the front cover 101, the rear cover 102, the display screen 103, the PLC104, the power supply 105, the interface 106, the sealing structure 107, the pressure sensor 108 and the temperature sensor 109; a gauge head 200; a metering chamber 300; the oil filling hole 303, the oil window 304, the front cover plate 305, the rear cover plate 306, the 310 second air inlet, 311 hollow tubular shape, 312 first oil through hole, 313 second oil through hole, 314 second air outlet, 315 left nose, 316 right nose, right wall plate 317, left wall plate 321, third oil through hole 325, fourth oil through hole 326, five oil through hole 327, first transmission shaft 328, second transmission shaft 329, transmission gear 330, third shaft hole 331, fourth shaft hole 332, first shaft hole 333, second shaft hole 334, bearing gland 337, driven gear 338, oil slinger 339, bearing 340, housing 370, first air inlet 371, first air outlet 372, front cover plate 373, rear cover plate 374, indicator 375, 376 mounting port, 377 metering chamber, 378 upper clamping port, 379 lower clamping port, 380 inner housing, 390 inner housing, rotor 391, first cable 400, second cable 500, third cable 600, bracket 700.
Detailed Description
The structure and operation of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1-2, a roots flowmeter comprises a gas flow volume corrector 100, a gauge head 200 and a metering chamber 300; the gas flow volume corrector 100 is connected to the measuring chamber 300 through a bracket 700; the gauge head 200 is connected with the metering chamber 300; the first interface of the gas flow volume correction instrument 100 is connected to the gauge head 200 via a first cable 400, and functions to collect pulse signals, and convert the pulse signals into flow signals after electronic processing. The second interface of the gas flow volume corrector 100 is connected with the pressure sensor 108 of the measuring chamber 300 through a second cable 500, and is used for acquiring the temperature value of the measuring chamber 300; the third port of the gas flow volume corrector 100 is connected with the temperature sensor 109 of the measuring chamber 300 through a third cable 600, and is used for acquiring the pressure value of the measuring chamber 300; a counter is arranged in the gauge head 200;
as shown in fig. 3, the gas flow volume corrector 100 is formed by hermetically connecting a front cover 101 and a rear cover 102, a hinge is arranged between the front cover 101 and the rear cover 102, four corners of the front cover and four corners of the rear cover are fixed into a whole by four screws, when the gas flow volume corrector is opened, the front cover and the rear cover are not disconnected, and a display screen 103 is arranged in the front cover; a PLC104 is connected in the rear cover 102, the PLC104 is connected with a power supply 105 and a display screen 103, and a plurality of interfaces 106 are connected on the rear cover 102; the PLC is connected with a GPS module and a Bluetooth module and is used for data exchange of a mobile phone or a computer to realize remote operation. The power supply 105 is a battery, and the battery is fixed through a battery holder. The open end of left side wallboard and right wallboard is equipped with seal structure 107 respectively, and seal structure 107 is equipped with the sealing washer for all seting up the seal groove on protecgulum 101 and back lid 102, both sealing connection.
As shown in fig. 4 and 7, the metering chamber 300 is composed of a housing 370, a movement 380, a front cover 373, and a rear cover 374; the front end of the metering chamber 300 is a meter head, the front cover plate 373 and the rear cover plate 374 are both provided with oil filling holes 303 and oil windows 304, the upper surface of the metering chamber 300 is provided with an indicator 375, one side of the indicator 375 is provided with three labeling positions 301, and the labeling positions 301 are provided with a temperature-sensitive interface 3011, a pressure-sensitive interface 3012 and a pressure-taking interface 3013 during verification in a one-to-one correspondence manner.
As shown in fig. 10, the housing 370 is a rectangular body, and a hollow circular-shaft-shaped metering chamber 377 is arranged in the housing; the metering chamber is provided with two mounting ports 376, and the two mounting ports 376 are respectively positioned on two opposite surfaces of the shell 370; the metering chamber 377 is also provided with first air inlet and outlet ports 371 and 372, the first air inlet and outlet ports 371 and 372 are respectively positioned on the other two opposite surfaces of the shell, and the central lines of the two mounting ports 376 are vertical to the central lines of the first air inlet and outlet ports 371 and 372; one of the other two opposite surfaces of the housing 370 is provided with an indicator 375 for indicating the installation direction of the first air inlet and outlet 371, 372; an upper clamping interface 378 and a lower clamping interface 379 are axially arranged on the inner wall of the metering chamber 377; four mounting holes are formed in the peripheries of the first air inlet and outlet 371 and 372, and the four mounting holes are uniformly distributed on the same circumference.
As shown in FIG. 11, the upper clip interface 378 is shaped as an inverted "bowl". The shape of the lower clamping interface 379 is an arc shape.
As shown in fig. 12, 13 and 17, the movement 380 includes an inner casing 390, the inner casing 390 is a hollow tube 311, and the hollow tube 311 is: the middle part is oval, and the upper end and the lower end are respectively provided with a raised head which is matched with the shape of the rotor 391. The pipe wall of the inner shell 390 is provided with a second air inlet 310 and a second air outlet 314 in the radial direction; a first oil through hole 312 and a second oil through hole 313 are axially and penetratingly arranged on the wall of the inner shell, the first oil through hole and the second oil through hole are respectively positioned above and below the inner shell 309, and the inner shell 309 is provided with a left raised head 315 and a right raised head 316;
as shown in fig. 13, the inner case 390 is symmetrical in front-rear, left-right, and up-down except for the first and second oil passing holes 312 and 313, and has an upper-lower center line a and a left-right center line b, the first and second oil passing holes 312 and 313 are diagonally formed in the wall of the inner case 390, the first oil passing hole 312 is located above the left lug 315 or the right lug 316, and the second oil passing hole 313 is located below the left lug 315 or the right lug 316.
A rotor 391 is clamped in the inner shell 390, and a first shaft hole 333 and a second shaft hole 334 are arranged on the rotor 391;
as shown in fig. 14-18 and fig. 3, the two ends of the inner casing 390 are respectively connected with a left wall panel 321 and a right wall panel 317 in a sealing manner, and the left and right wall panels 321, 317 are both trough-shaped and have the same structure, and are respectively connected with a front cover plate 373 and a rear cover plate 374 in a sealing manner to serve as an oil tank; a third oil through hole 325 and a fourth oil through hole 326 are arranged on the left wall plate 321, and a fifth oil through hole 327 and a sixth oil through hole are arranged on the right wall plate 317; the first oil through hole 312, the third oil through hole 325 and the fifth oil through hole are corresponding to 327 and are communicated with each other to form an upper oil through hole; the second oil through hole 313, the fourth oil through hole 326 and the sixth oil through hole correspond to each other and are connected in a penetrating manner to form a lower oil through hole; the middle parts of the left wall plate 321 and the right wall plate 317 are respectively provided with a third shaft hole 331, a fourth shaft hole 332, a fifth shaft hole and a sixth shaft hole; the first transmission shaft 328 is connected with the first shaft hole 333, the third shaft hole 331 and the fifth shaft hole in a penetrating manner; the second transmission shaft 329 is connected with the second shaft hole 334, the fourth shaft hole 332 and the sixth shaft hole in a penetrating manner;
one end of the first transmission shaft 328 and one end of the second transmission shaft 329 are respectively provided with an oil throwing sheet 339, a bearing gland 337 and a bearing 340 from outside to inside in sequence; the oil throwing sheet 339, the bearing gland 337 and the bearing 340 are all positioned in the groove of the left wall plate 321, and the transmission gear 330 is arranged on the first transmission shaft 328 and positioned in front of the oil throwing sheet 339;
as shown in fig. 14, the other ends of the first transmission shaft 328 and the second transmission shaft 329 are respectively provided with an oil throwing sheet 339, a driven gear 338, a bearing gland 337 and a bearing 340 in sequence from outside to inside; the two driven gears 338 intermesh; oil slinger 339, driven gear 338, bearing gland 337 and bearing 340 are all located in right wall plate 317.
A movement 380 is sleeved in the outer shell 370, left and right raised heads 315 and 316 of the movement 380 are respectively assembled at two sides of an upper card interface 378 and a lower card interface 379 of the inner shell 370, and the first air inlet and outlet 371 and 372 correspond to the second air inlet and outlet 310 and 314;
the front cover plate 305 is provided with an oil filling hole 303 and an oil window 304; the rear cover plate 306 is provided with an oil filling hole 303 and an oil window 304; the oil filling hole 303 is above, and the oil window 304 is below;
the oil filling hole 303 is arranged corresponding to the upper oil through hole, and the oil window 304 is arranged corresponding to the lower oil through hole; the oil window 304 is used for observing the oil filling amount;
the amount of fuel added from the filler hole is: preferably, the oil throwing sheet is contacted with the lowest part of the oil throwing sheet by 1mm-10 mm;
therefore, the pressure difference is formed between the air inlet and the air outlet, the rotor is pushed, the pinion on the transmission shaft is rotated, and the counter in the meter head is driven to change.
Claims (10)
1. A Roots flowmeter comprises a gas flow volume corrector (100), a meter head (200) and a metering chamber (300); the gas flow volume corrector (100) is connected with the metering chamber (300) through a bracket; the gauge head (200) is connected with the metering chamber (300); the method is characterized in that:
the gas flow volume corrector (100) is formed by hermetically connecting a front cover (101) and a rear cover (102), hinges are arranged between the front cover (101) and the rear cover (102), four corners of the front cover (101) and four corners of the rear cover (102) are fixed into a whole through four screws, and a display screen (103) is arranged in the front cover (101); a PLC (104) is connected in the rear cover (102), the PLC (104) is connected with a power supply (105) and a display screen (103), and a plurality of interfaces (106) are connected on the rear cover (102);
a first interface of the gas flow volume corrector is connected with the gauge head through a first cable, acquires a pulse signal, and converts the pulse signal into a flow signal after electronic processing;
a second interface of the gas flow volume corrector is connected with a pressure sensor of the metering chamber through a second cable and is used for collecting a pressure value of the metering chamber;
a third port of the gas flow volume corrector is connected with the temperature sensor of the metering chamber through a third cable and is used for collecting the temperature value of the metering chamber;
a counter is arranged in the gauge head;
the metering chamber consists of a shell, a machine core, a front cover plate and a rear cover plate;
the shell is a rectangular body, and a hollow round shaft-shaped metering chamber is arranged in the shell; the metering chamber is provided with two mounting ports which are respectively positioned on two opposite surfaces of the shell; the metering chamber is also provided with a first air inlet and a first air outlet, the first air inlet and the first air outlet are respectively positioned on the other two opposite surfaces of the shell, and the central lines of the two mounting ports are vertical to the central lines of the first air inlet and the first air outlet; one of the other two opposite surfaces of the shell is provided with an indicator for indicating the installation direction of the first air inlet and the first air outlet; an upper clamping interface and a lower clamping interface are axially arranged on the inner wall of the metering chamber;
the machine core comprises an inner shell, the inner shell is in a hollow tubular shape, and a second air inlet and a second air outlet are arranged on the wall of the inner shell in the radial direction; the tube wall of the inner shell is axially provided with a first oil through hole and a second oil through hole in a penetrating manner, the first oil through hole and the second oil through hole are respectively positioned above and below the inner shell, and the inner shell is provided with a left raised head and a right raised head;
a rotor is clamped in the inner shell, and a first shaft hole and a second shaft hole are formed in the rotor;
the two ends of the inner shell are respectively connected with a left wall plate and a right wall plate in a sealing mode, the left wall plate and the right wall plate are both groove-shaped and consistent in structure, and the left wall plate and the right wall plate are respectively connected with the front cover plate and the rear cover plate in a sealing mode and serve as oil tanks; a third oil through hole and a fourth oil through hole are formed in the left wall plate, and a fifth oil through hole and a sixth oil through hole are formed in the right wall plate; the first oil through hole, the third oil through hole and the fifth oil through hole correspond to each other and are communicated with each other to form an upper oil through hole; the second oil through hole, the fourth oil through hole and the sixth oil through hole correspond to each other and are communicated with each other to form a lower oil through hole; the middle parts of the left and right wall plates are respectively provided with a third shaft hole, a fourth shaft hole, a fifth shaft hole and a sixth shaft hole;
the first transmission shaft is connected with the first shaft hole, the third shaft hole and the fifth shaft hole in a penetrating manner;
the second transmission shaft is connected with the second shaft hole, the fourth shaft hole and the sixth shaft hole in a penetrating manner;
one end of the first transmission shaft and one end of the second transmission shaft are respectively provided with an oil throwing sheet, a bearing gland and a bearing in turn from outside to inside; the oil throwing sheet, the bearing gland and the bearing are all positioned in the groove of the left wall plate, and the transmission gear is arranged on the first transmission shaft and positioned in front of the oil throwing sheet;
the other ends of the first transmission shaft and the second transmission shaft are respectively provided with an oil throwing sheet, a driven gear, a bearing gland and a bearing from outside to inside in sequence; the two driven gears are meshed with each other; the oil throwing sheet, the driven gear, the bearing gland and the bearing are all positioned in the right wall plate;
the machine core is sleeved in the outer shell, the left raised head and the right raised head of the machine core are respectively assembled on two sides of the upper clamping port and the lower clamping port of the inner shell, and the first air inlet and the first air outlet correspond to the second air inlet and the second air outlet;
the front cover plate is provided with an oil filling hole and an oil window; the rear cover plate is provided with an oil filling hole and an oil window; the oil filling hole is arranged above the oil filling hole, and the oil window is arranged below the oil filling hole.
2. A roots flowmeter according to claim 1, wherein: the PLC is connected with a GPS module and a Bluetooth module and used for data exchange and realizing remote operation.
3. A roots flowmeter according to claim 1, wherein: the power supply adopts a battery, and the battery is fixed through a battery seat.
4. A roots flowmeter according to claim 1, wherein: the hollow tubular shape of the inner shell is: the middle part is oval, and the upper end and the lower end are respectively provided with a raised head which is matched with the shape of the rotor.
5. A roots flowmeter according to claim 1, wherein: the upper clamping interface and the lower clamping interface are symmetrical about a central line a of the inner shell.
6. A roots flowmeter according to claim 1, wherein: the shape of the upper clamping interface is an inverted bowl shape.
7. A roots flowmeter according to claim 1, wherein: the shape of lower joint interface is "circular arc" type.
8. A roots flowmeter according to claim 1, wherein: one side of the indicator is provided with three labeling positions, and the labeling positions are provided with a temperature-sensitive interface, a pressure-sensitive interface and a pressure-taking interface during verification in a one-to-one correspondence mode.
9. A roots flowmeter according to claim 1, wherein: four mounting holes are formed in the periphery of the air inlet and the air outlet, and the four mounting holes are evenly distributed on the circumference.
10. A roots flowmeter according to claim 1, wherein: and the opening ends of the left wall plate and the right wall plate are respectively provided with a sealing ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650786.XA CN108827413B (en) | 2018-06-22 | 2018-06-22 | Roots flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650786.XA CN108827413B (en) | 2018-06-22 | 2018-06-22 | Roots flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108827413A CN108827413A (en) | 2018-11-16 |
| CN108827413B true CN108827413B (en) | 2020-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810650786.XA Active CN108827413B (en) | 2018-06-22 | 2018-06-22 | Roots flowmeter |
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| CN (1) | CN108827413B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114777865B (en) * | 2021-12-13 | 2023-01-31 | 浙江裕顺仪表有限公司 | Roots flow metering device for industrial gas prepayment |
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| CN203241094U (en) * | 2013-05-10 | 2013-10-16 | 罗美特（上海）自动化仪表有限公司 | Roots type flow meter |
| CN204064366U (en) * | 2014-05-09 | 2014-12-31 | 成都伦慈仪表有限公司 | A kind of Roots's gas meter of compact conformation |
| CN205808492U (en) * | 2016-07-21 | 2016-12-14 | 宁波创盛仪表有限公司 | A kind of rotz flowmeter housing |
| CN107607167A (en) * | 2017-07-05 | 2018-01-19 | 上海埃科燃气测控设备有限公司 | The built-in multi-faceted gas roots flowmeter of temperature and pressure compensation |
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| RO102076A2 (en) * | 1988-09-16 | 1991-11-25 | Intreprinderea "Nicolina", Iasi, Ro | Filling device at profiled rotator blowers |
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| CN107607167A (en) * | 2017-07-05 | 2018-01-19 | 上海埃科燃气测控设备有限公司 | The built-in multi-faceted gas roots flowmeter of temperature and pressure compensation |
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