CN203869741U - Gas Roots-type flowmeter with external bearings - Google Patents
Gas Roots-type flowmeter with external bearings Download PDFInfo
- Publication number
- CN203869741U CN203869741U CN201420288402.1U CN201420288402U CN203869741U CN 203869741 U CN203869741 U CN 203869741U CN 201420288402 U CN201420288402 U CN 201420288402U CN 203869741 U CN203869741 U CN 203869741U
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- CN
- China
- Prior art keywords
- waist
- waist wheel
- bearing
- roots
- wheel shaft
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Abstract
The utility model discloses a gas Roots-type flowmeter with external bearings. The flowmeter comprises a flow totalizer, a support and a Roots flow sensor, a pair of waist wheels are arranged in the Roots flow sensor, the rear end of the Roots flow sensor is provided with a rear cover assembly which comprises a cover plate and a rear cover, the cover plate is rotatably provided with a pair of waist wheel shafts matched with the pair of waist wheels in a linked mode, the two waist wheel shafts are provided with synchronous gears which are mutually meshed in transmission in a linkage mode, the geometrical shape of the end face of each waist wheel is formed by multiple sections of tangent arcs, the left sides and the right sides of the tops of the two large-diameter sides of the waist wheels are provided with sewage discharging grooves, and the inner side, corresponding to the outer end of the waist wheel shaft, of the rear cover is fixedly provided with the external bearings matched with the waist wheel shafts in a rotatable and supporting mode. The flowmeter has the advantages of being stable and reliable in use and convenient to replace and maintain.
Description
Technical field
The utility model relates to a kind of gas Roots flow meter, specifically refers to a kind of bearing external gas Roots flow meter.
Background technology
Gas Roots (claim again waist wheel) flowmeter, is high-precision gas flow-meter, for the flow through gas gross of closed conduct of accurate measurement.Be suitable for measuring rock gas, town gas, propane, nitrogen, industrial inertia gas etc.Since mid-term in last century, combustion gas is as one of the main energy sources in city, and consumption increases sharply.Thing followed measurement problem is also increasingly outstanding.The instrument of measuring combustion gas has deaphragm gas meter, gas turbine meter, gas Roots flow meter and ultrasonic flow meter.As the industrial table of termination charge metering, it is most suitable only having Roots type flowmeter.
The key component of gas Roots flow meter is waist wheel, and its end surface shape can be made up of different curves.The waist wheel resistance that forms with many mutually tangent arc sections is little, staring torque is little, often turns discharge capacity and compares the features such as increase, easily makes the gauging table of small-bore large flow.
The shortcoming of gas Roots flow meter is that the foul in gas can enter and in cavity and bearing, causes the bearing at waist wheel two ends rotate dumb or damage, while maintenance like this, be exactly first to change bearing, first to dismantle synchromesh gear owing to changing bearing, dismounting synchromesh gear can change the relative position of two waist wheels, therefore, dismounting is safeguarded inconvenient.
Summary of the invention
The purpose of this utility model is the shortcoming and defect existing in order to overcome prior art, and provides a kind of structure to arrange rationally, the bearing external gas Roots flow meter that dismounting is easy to maintenance.
For achieving the above object, the technical solution of the utility model is to include flow integrator, support and Roots's flow sensor, in this Roots's flow sensor, be provided with a pair of waist wheel, the rear end of this Roots's flow sensor is provided with rear case component, this rear case component includes cover plate and bonnet, on cover plate, rotate to be provided with respectively and take turns with a pair of waist a pair of waist wheel shaft being linked, on these two waist wheel shafts, be all linkedly set with the synchromesh gear of intermeshing transmission, it is characterized in that: the end face geometric configuration of this waist wheel forms by multi-section circular arc is tangent, and the left and right sides, top of taking turns both sides, large footpath at waist is provided with dirt discharge groove, described bonnet inner side is fixedly installed corresponding to the outer end of waist wheel shaft the external bearing coordinating with waist wheel shaft rotational support.
Further arrange is that described bonnet inner side is provided with the waist wheel shaft outer end corresponding with waist wheel shaft and accommodates groove, the outside endface position that this waist wheel shaft outer end accommodates groove is provided with the external bearing bore of locating with outboard bearing scarf, described external bearing is placed in external bearing bore, and the outer end of this external bearing is spacing fixing by bearing cap.
The utility model has the advantages that: the upper dirt discharge groove arranging of waist wheel, reduce the stuck probability of rotor, improve reliability, and the built-in pattern of synchromesh gear end bearing that breaks traditions of the utility model, the bearing of waist wheel shaft outer end is external setting, thereby needn't dismantle synchromesh gear while making to change bearing, has ensured that like this two synchromesh gear relative positions do not change, can not damage synchromesh gear, be convenient to repair and replacement yet.
Below in conjunction with specification drawings and specific embodiments, the utility model is described further.
Brief description of the drawings
Fig. 1 is profile schematic diagram of the present utility model.
Fig. 2 is rotor end-face geometric configuration schematic diagram of the present utility model.
Fig. 3 is synchromesh gear end bearing external structure schematic diagram of the present utility model.
1. flow integrators in figure, 2. support, 3. front cover component, 4. Roots's flow sensor, 5. rear case component, 6. cover plate, 7. synchromesh gear, 8. bonnet, 9. external bearing, 10. bearing cap, 11. waist wheel shafts, waist wheel 12.
Embodiment
Below by embodiment, the utility model is specifically described, only for the utility model is further described, can not be interpreted as the restriction to the utility model protection domain.
Embodiment of the present utility model as Figure 1-3, in figure, the flow signal that Roots's flow sensor 4 spreads out of, detect by magneto-dependent sensor the magnetic signal that sender set spreads out of, become electric signal and be sent to flow integrator 1, simultaneously the temperature signal of fluid and pressure signal be by temperature sensor and pressure transducer collection and be converted to electric signal and be sent in flow integrator 1 and show, and through temperature and pressure compensation operation flow under display standard state in flow integrator 1.
The appearance profile of the utility model waist wheel 12 is made up of many tangent arc sections 122 mutually, if the profile at actual production rotor wheel is processed by tangent mutually arc section completely, its maximum shortcoming is exactly easily stuck by foul, so in embodiment illustrated in fig. 2, be positioned at both sides, the large footpath of rotor and be provided with four dirt discharge grooves 121 and play the effect of blowdown, reduce the probability that rotor wheel is stuck, improve reliability and the dirigibility of flowmeter, increase the service life.
In the embodiment shown in fig. 3, bearing adopts external structure, external bearing 9 use bearing caps 10 are fixed on bonnet 8, make flowmeter be convenient to maintain and replace bearing, described bonnet 8 inner sides are provided with the waist wheel shaft outer end corresponding with waist wheel shaft and accommodate groove 81 particularly, the outside endface position that this waist wheel shaft outer end accommodates groove 81 is provided with the external bearing bore 82 of locating with outboard bearing scarf, described external bearing 9 is placed in external bearing bore 82, and the outer end of this external bearing 82 is spacing fixing by bearing cap 10.
Claims (2)
1. a bearing external gas Roots flow meter, it is characterized in that: include flow integrator, support and Roots's flow sensor, in this Roots's flow sensor, be provided with a pair of waist wheel, the rear end of this Roots's flow sensor is provided with rear case component, this rear case component includes cover plate and bonnet, on cover plate, rotate to be provided with respectively and take turns with a pair of waist a pair of waist wheel shaft being linked, on these two waist wheel shafts, be all linkedly set with the synchromesh gear of intermeshing transmission, it is characterized in that: the end face geometric configuration of this waist wheel forms by multi-section circular arc is tangent, and the left and right sides, top of taking turns both sides, large footpath at waist is provided with dirt discharge groove, described bonnet inner side is fixedly installed corresponding to the outer end of waist wheel shaft the external bearing coordinating with waist wheel shaft rotational support.
2. a kind of bearing external gas Roots flow meter according to claim 1, it is characterized in that: described bonnet inner side is provided with the waist wheel shaft outer end corresponding with waist wheel shaft and accommodates groove, the outside endface position that this waist wheel shaft outer end accommodates groove is provided with the external bearing bore of locating with outboard bearing scarf, described external bearing is placed in external bearing bore, and the outer end of this external bearing is spacing fixing by bearing cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288402.1U CN203869741U (en) | 2014-05-30 | 2014-05-30 | Gas Roots-type flowmeter with external bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288402.1U CN203869741U (en) | 2014-05-30 | 2014-05-30 | Gas Roots-type flowmeter with external bearings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203869741U true CN203869741U (en) | 2014-10-08 |
Family
ID=51650681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420288402.1U Expired - Fee Related CN203869741U (en) | 2014-05-30 | 2014-05-30 | Gas Roots-type flowmeter with external bearings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203869741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303152A (en) * | 2018-01-31 | 2018-07-20 | 秦卫良 | A kind of rotz flowmeter |
-
2014
- 2014-05-30 CN CN201420288402.1U patent/CN203869741U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303152A (en) * | 2018-01-31 | 2018-07-20 | 秦卫良 | A kind of rotz flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151118 Address after: Yong Zhong Road Longwan District Wenzhou street after chapter 325025 Zhejiang province No. 111 third floor Patentee after: Zhejiang Yu Shun Instrument Co., Ltd. Address before: 325000 Zhejiang city of Wenzhou province Longwan Center Industrial District Yongzhong mountain Patentee before: Fuma Instrument Co., Ltd., Zhejiang Prov. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20200530 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |