CN203241094U - Roots type flow meter - Google Patents
Roots type flow meter Download PDFInfo
- Publication number
- CN203241094U CN203241094U CN 201320254384 CN201320254384U CN203241094U CN 203241094 U CN203241094 U CN 203241094U CN 201320254384 CN201320254384 CN 201320254384 CN 201320254384 U CN201320254384 U CN 201320254384U CN 203241094 U CN203241094 U CN 203241094U
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- Prior art keywords
- armature spindle
- pair
- waist wheel
- gear
- housing
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Abstract
The utility model discloses a Roots type flow meter which comprises a shell body, and a pair of metering rotors. The metering rotors are arranged in the shell body and divide the shell body into an air inlet cavity and an air outlet cavity. Each metering rotor comprises a waist wheel and a rotor shaft. The two ends of each rotor shaft are both exposed out of two side wall plates of the shell body. A pair of mutually-meshed gears is arranged on each rotor shaft on the outer side of one side wall plate of the shell body. A turbine worm mechanism used for counting air is arranged on the rotor shaft on the outer side of the other side wall plate of the shell body. The rotor shaft of each metering rotor is divided into two sections. One end of one section of the rotor shaft where the gears are arranged is in interference spline fit with the waist wheel, and is in interference taper fit with the installed gears. One end of the other section of the rotor shaft is in interference spline fit with the waist wheel. The waist wheel, the gears and the rotor shafts are all in interference fit, so that coaxial errors formed in the installation process are eliminated. Consequently, the waist wheels rotate stably, the gears are stable in meshing, noise in working is little, and metering precision is high.
Description
Technical field
The utility model relates to flowmeter, specifically relates to a kind of Roots type flowmeter for gas pipeline.
Background technology
Roots type flowmeter claims again gas roots flowmeter, is to be mainly used in the air in pipeline flow is carried out continuously or the high-precision measuring instrument of intermittently measuring.It has that precision is high, good reliability, lightweight, the life-span is long, running noises is low, the characteristics such as easy to install.Roots type flowmeter can on-the-spotly be indicated integrated flux, instantaneous delivery, single dose etc., also exportable pulse signal, 4-20mA or 1-5V simulating signal, 485 communications, MODBUS signal etc.
Roots type flowmeter comprises housing, be provided with a pair of metering rotor in the described housing, described metering rotor comprises the housing inner chamber is divided into inlet chamber and outlet chamber, the cross section is the armature spindle that waist wheel central axis was taken turns and be arranged to the waist of the tangent rotation of the figure of eight, described armature spindle matches with housing both sides wallboard by bearing, the both sides wallboard of housing is all exposed at the two ends of described armature spindle, the armature spindle of a pair of metering rotor outside housing one framed side wallboard is equipped with a pair of gear that is meshed, and the armature spindle of a pair of metering rotor outside housing opposite side wallboard is equipped with a cover for the turbine and worm mechanism that gas is counted.
One of them waist wheel rotates under the effect of air inlet in a pair of metering rotor of Roots type flowmeter, the waist wheel drives the armature spindle rotation of corresponding measurement rotor, armature spindle drives the gear that is installed on the one end, the gear that this gear drives again another metering rotor that is engaged with rotates, the gear of another metering rotor drives again this metering rotor and rotates, thereby realizes the tangent rotation of this a pair of waist wheel.
The armature spindle of traditional metering rotor is columned Step Shaft, the center of waist wheel arrange one with the circular hole of armature spindle clearance fit, waist wheel and armature spindle are fixed together by holding screw or pin; Gear and armature spindle that one end of armature spindle is installed also are clearance fit, come transmitting torque by between gear and armature spindle flat key being set.Such structure is in assembling process, inevitably can there be coaxiality error between waist wheel and the armature spindle, also can there be coaxiality error between armature spindle and the gear, form especially cumulative coaxiality error between waist wheel and the gear, thereby the whole system transmission is steady not, noise is larger when work, and measuring accuracy also has much room for improvement.
Summary of the invention
For above-mentioned situation, the utility model provides a kind of Roots type flowmeter, adopts interference fit to eliminate the coaxiality error that forms in the assembling between waist wheel, gear and the armature spindle by making, and makes the whole system stable drive, reduces noise, improves measuring accuracy.
To achieve these goals, the technical solution of the utility model is as follows:
Roots type flowmeter, comprise housing, be provided with a pair of metering rotor in the described housing, described metering rotor comprises the housing inner chamber is divided into inlet chamber and outlet chamber, the cross section is the armature spindle that waist wheel central axis was taken turns and be arranged to the waist of the tangent rotation of the figure of eight, described armature spindle matches with the both sides wallboard of housing by bearing, the both sides wallboard of housing is all exposed at the two ends of described armature spindle, the armature spindle of a pair of metering rotor outside housing one framed side wallboard is equipped with a pair of gear that is meshed, and the armature spindle of a pair of metering rotor outside housing opposite side wallboard is equipped with a cover for the turbine and worm mechanism that gas is counted; It is characterized in that, the armature spindle of described metering rotor is divided into two sections; The end that one section armature spindle of gear wherein is installed is set to spline shaft structure with the position that the waist wheel cooperates, and the relevant position of described waist wheel is the splined hole structure, is interference fit between this splined shaft and the splined hole; The gear of this armature spindle and installation is the taper fit of interference; One end of another section armature spindle also is set to spline shaft structure with the position that the waist wheel cooperates, and the relevant position of described waist wheel is the splined hole structure, also is interference fit between this splined shaft and the splined hole.
The pressure angle of a pair of gear that is meshed of installing on the armature spindle of described a pair of metering rotor is 14.5 degree.
The taper angle β of the taper fit of described armature spindle and gear is 7 degree.
The end of described each splined shaft and each splined hole is provided with chamfering.
The beneficial effects of the utility model are, are interference fit between waist wheel, gear and the armature spindle, have eliminated the coaxiality error that forms in the installation process, and the right alignment of dimension waist wheel, gear and armature spindle is high, thus the stability of rotation of waist wheel; The pressure angle of gear is 14.5 degree, compares with traditional pressure angle 20 degree, meshes more stable; Thereby the noise in the work is little, and measuring accuracy is high.
Description of drawings
Fig. 1 is that the master of the utility model Roots type flowmeter looks cross-sectional schematic.
Fig. 2 is that the master of the metering rotor of the utility model Roots type flowmeter looks cut-open view.
Fig. 3 is the side view of the metering rotor of the utility model Roots type flowmeter.
Fig. 4 is that the master of the gear of the utility model Roots type flowmeter looks cut-open view.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1, Fig. 2, Fig. 3, Roots type flowmeter, comprise housing 1, be provided with a pair of metering rotor 2 in the described housing 1, described metering turns 2 attached bags and draws together the housing inner chamber is divided into inlet chamber and outlet chamber, the cross section is the waist wheel 2a and the armature spindle that is arranged at waist wheel central axis of the tangent rotation of the figure of eight, described armature spindle matches with the both sides wallboard of housing 1 by bearing 3, the both sides wallboard of housing 1 is all exposed at the two ends of described armature spindle, the armature spindle of a pair of metering rotor outside housing 1 one framed side wallboards is equipped with a pair of gear that is meshed 4, and the armature spindle of a pair of metering rotor outside housing opposite side wallboard is equipped with a cover for the turbine and worm mechanism 5 that gas is counted.
The armature spindle of described metering rotor is divided into two sections; The end that one section armature spindle 2b of gear wherein is installed is set to spline shaft structure with the position that waist wheel 2a cooperates, and the relevant position of described waist wheel 2a is the splined hole structure, is interference fit between this splined shaft and the splined hole; The gear 4 of this armature spindle 2b and installation is the taper fit of interference; The end of another section armature spindle 2c also is set to spline shaft structure with the position that waist wheel 2a cooperates, and the relevant position of described waist wheel 2a is the splined hole structure, also is interference fit between this splined shaft and the splined hole.
One of them waist wheel rotates under the effect of air inlet in a pair of metering rotor of the present utility model, waist wheel 2a drives the armature spindle rotation of corresponding measurement rotor under the effect of the friction force that interference fit forms, armature spindle drives again the gear of one end under the effect of the friction force that interference fit forms, the gear that this gear drives again another metering rotor that is engaged with rotates, the gear of another metering rotor drives again this metering rotor under the effect of the friction force that interference fit forms armature spindle rotates, the armature spindle of this metering rotor drives again corresponding waist wheel and rotates under the effect of the friction force that interference fit forms, thereby realizes the tangent rotation of this a pair of waist wheel.
Be interference fit between waist wheel of the present utility model, gear and the armature spindle, eliminated the coaxiality error that forms in the installation process, so the right alignment of waist wheel, gear and armature spindle is high, thus the stability of rotation of waist wheel; The pressure angle of gear is 14.5 degree, compares with traditional pressure angle 20 degree, meshes more stable; Thereby the noise in the work is little, and measuring accuracy is high.
Above demonstration and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and the instructions is principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (4)
1. Roots type flowmeter, comprise housing, be provided with a pair of metering rotor in the described housing, described metering rotor comprises the housing inner chamber is divided into inlet chamber and outlet chamber, the cross section is the armature spindle that waist wheel central axis was taken turns and be arranged to the waist of the tangent rotation of the figure of eight, described armature spindle matches with the both sides wallboard of housing by bearing, the both sides wallboard of housing is all exposed at the two ends of described armature spindle, the armature spindle of a pair of metering rotor outside housing one framed side wallboard is equipped with a pair of gear that is meshed, and the armature spindle of a pair of metering rotor outside housing opposite side wallboard is equipped with a cover for the turbine and worm mechanism that gas is counted; It is characterized in that, the armature spindle of described metering rotor is divided into two sections; The end that one section armature spindle of gear wherein is installed is set to spline shaft structure with the position that the waist wheel cooperates, and the relevant position of described waist wheel is the splined hole structure, is interference fit between this splined shaft and the splined hole; The gear of this armature spindle and installation is the taper fit of interference; One end of another section armature spindle also is set to spline shaft structure with the position that the waist wheel cooperates, and the relevant position of described waist wheel is the splined hole structure, also is interference fit between this splined shaft and the splined hole.
2. Roots type flowmeter according to claim 1 is characterized in that, the pressure angle of a pair of gear that is meshed of installing on the armature spindle of described a pair of metering rotor is 14.5 degree.
3. Roots type flowmeter according to claim 1 is characterized in that, the taper angle of the taper fit of described armature spindle and gear (β) is 7 degree.
4. Roots type flowmeter according to claim 1 is characterized in that, the end of described each splined shaft and each splined hole is provided with chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320254384 CN203241094U (en) | 2013-05-10 | 2013-05-10 | Roots type flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320254384 CN203241094U (en) | 2013-05-10 | 2013-05-10 | Roots type flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203241094U true CN203241094U (en) | 2013-10-16 |
Family
ID=49318380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320254384 Expired - Fee Related CN203241094U (en) | 2013-05-10 | 2013-05-10 | Roots type flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203241094U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983315A (en) * | 2014-05-09 | 2014-08-13 | 成都伦慈仪表有限公司 | Roots gas flowmeter |
| CN104142164A (en) * | 2013-05-10 | 2014-11-12 | 罗美特（上海）自动化仪表有限公司 | Gas Roots flowmeter |
| CN108303152A (en) * | 2018-01-31 | 2018-07-20 | 秦卫良 | A kind of rotz flowmeter |
| CN108827413A (en) * | 2018-06-22 | 2018-11-16 | 上海功尊仪表有限公司 | A kind of Roots type flowmeter |
-
2013
- 2013-05-10 CN CN 201320254384 patent/CN203241094U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142164A (en) * | 2013-05-10 | 2014-11-12 | 罗美特（上海）自动化仪表有限公司 | Gas Roots flowmeter |
| CN103983315A (en) * | 2014-05-09 | 2014-08-13 | 成都伦慈仪表有限公司 | Roots gas flowmeter |
| CN103983315B (en) * | 2014-05-09 | 2017-02-15 | 成都伦慈仪表有限公司 | Roots gas flowmeter |
| CN108303152A (en) * | 2018-01-31 | 2018-07-20 | 秦卫良 | A kind of rotz flowmeter |
| CN108827413A (en) * | 2018-06-22 | 2018-11-16 | 上海功尊仪表有限公司 | A kind of Roots type flowmeter |
| CN108827413B (en) * | 2018-06-22 | 2020-04-03 | 上海功尊仪表有限公司 | Roots flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20190510 |