CN220322457U - Single screw flowmeter for metering fluid containing hard particles - Google Patents
Single screw flowmeter for metering fluid containing hard particles Download PDFInfo
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- CN220322457U CN220322457U CN202321749704.XU CN202321749704U CN220322457U CN 220322457 U CN220322457 U CN 220322457U CN 202321749704 U CN202321749704 U CN 202321749704U CN 220322457 U CN220322457 U CN 220322457U
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- shaft sleeve
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- 239000002245 particle Substances 0.000 title claims abstract description 51
- 239000012530 fluid Substances 0.000 title claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 239000008187 granular material Substances 0.000 claims abstract description 19
- 230000007704 transition Effects 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
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Abstract
The utility model discloses a single-screw flowmeter for measuring fluid containing hard particles, wherein a first support and a second support are in interference fit with a shell; the first shaft sleeve is supported in the first support seat through a sliding bearing; the first shaft end support piece is in transition fit with the first support seat and forms a ball pair with the end face of the first shaft sleeve; the first shaft sleeve is provided with a granule discharging spiral groove; the first support is provided with a granule discharging hole; the second shaft end support piece is in transition fit with the second support seat and forms a ball pair with the end face of the second shaft sleeve; the second shaft sleeve is supported in the second support seat through a sliding bearing; two ends of the screw shaft are respectively in interference fit with the first shaft sleeve and the second shaft sleeve; the screw rod is sleeved on the screw rod shaft and is excessively matched with the screw rod shaft. When the utility model is used for metering the fluid containing hard particles, the friction loss of the single-screw flowmeter during working can be effectively reduced, the situation that the fluid cannot normally work due to overlarge friction force caused by accumulation of tiny particles is avoided, and the metering precision and the service life of the flowmeter are greatly ensured.
Description
Technical Field
The utility model relates to a screw flowmeter, in particular to a single screw flowmeter for measuring fluid containing hard particles.
Background
As a mechanical flowmeter, a volumetric flowmeter mainly uses a mechanical measuring element to divide a fluid into a single known volume, and measures the total volume of the fluid based on the number of times the measuring chamber is filled and discharged repeatedly. The screw flowmeter is one of the positive displacement flowmeters and is widely applied to measurement of viscous media such as oils and the like. For the fluid doped with hard particles, the existing screw flowmeter is easy to accumulate hard particles between the screw shaft and the sliding bearing after working for a period of time, so that abrasion of the screw surface and the matching surface of the sliding bearing is accelerated, the metering precision of the screw flowmeter is reduced, and the service life is prolonged. Therefore, it is desirable to design a screw flowmeter that reduces wear of hard particles on the bearing mating surfaces of the support screw.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a single-screw flowmeter for metering fluid containing hard particles.
The utility model comprises a second bearing mounting seat, a pulse signal generator, a shell, a first bearing mounting seat, a screw rod and a screw rod shaft. The first bearing mounting seat comprises a first support, a first shaft end supporting piece, a sliding bearing and a first shaft sleeve; the first support is in interference fit with the central hole of the shell; the first support is provided with a plurality of output channels uniformly distributed along the circumferential direction of the central blind hole, and the bottom of the first support is provided with a plurality of granule discharging holes uniformly distributed along the circumferential direction and supporting holes coaxially arranged with the central blind hole; the first shaft sleeve is supported in the central blind hole of the first support through a sliding bearing, and the contact part between the outer ring of the sliding bearing and the central blind hole of the first support is a spherical surface; the first shaft end supporting piece is in transition fit with the supporting hole of the first support; the spherical surface of the first shaft end support piece extends into the central blind hole of the first support seat and forms a spherical pair with the end surface of the first shaft sleeve; a gap is arranged between the spherical surface of the first shaft end support piece and the central blind hole of the first support; the first shaft sleeve is provided with a granule discharging spiral groove.
The second bearing mounting seat comprises a second support, a second shaft end supporting piece, a sliding bearing and a second shaft sleeve; the second support is in interference fit with the central hole of the shell; n input channels are uniformly distributed along the circumference of the central through hole and are more than or equal to 3; the second shaft end support piece is in transition fit with a hole section with smaller hole diameter of the central through hole of the second support; the second shaft sleeve is supported in a hole section with larger hole diameter of the central through hole of the second support through a sliding bearing; the spherical surface of the second shaft end support piece stretches into a hole section with larger aperture of the second central through hole of the support, a spherical pair is formed by the spherical surface of the second shaft sleeve and the end surface of the second shaft sleeve, and the contact part between the outer ring of the sliding bearing and the second central through hole of the support is also spherical.
The two ends of the screw shaft are respectively in interference fit with the first shaft sleeve and the second shaft sleeve, and the screw is sleeved on the screw shaft and is in excessive fit with the screw shaft; the screw shaft is fixed with a pulse signal generator near the two positions of the shaft sleeve.
Preferably, the spherical groove of one end surface of the shaft sleeve and the spherical surface of the first shaft end support piece form a spherical pair.
Preferably, the second support is also provided with n inclined granule discharging channels uniformly distributed along the circumferential direction of the central through hole, and each input channel is communicated with a hole section with larger hole diameter of the central through hole of the second support through one inclined granule discharging channel; the communication port between the inclined particle discharging channel and the central through hole of the second support is positioned in a gap between the spherical surface of the second shaft end support and the central through hole of the second support; the second shaft sleeve is provided with a granule discharging spiral groove.
Preferably, the spherical groove on the two end surfaces of the shaft sleeve and the spherical surface of the second shaft end support piece form a spherical pair.
Preferably, it also comprises a screw sleeve; the screw rod sleeve is in interference fit with the central hole of the shell and in clearance fit with the screw rod.
The utility model has the beneficial effects that:
1. when the hard particles are extruded into a fit clearance between the second shaft sleeve and the sliding bearing, the hard particles are conveyed into the clearance between the spherical surface of the second shaft end support piece and the central through hole of the second support through the particle discharge spiral groove of the second shaft sleeve, and when fluid flows through the input channel of the second support, low pressure is generated in the inclined particle discharge channel of the second support, and the hard particles between the spherical surface of the second shaft end support piece and the central through hole of the second support are sucked into the input channel of the second support through the inclined particle discharge channel. When hard particles enter a fit gap between the first shaft sleeve and the sliding bearing, tiny hard particles between the first shaft sleeve and the sliding bearing are discharged in time through a particle discharge spiral groove formed in the first shaft sleeve and are conveyed to the output end of the shell through a particle discharge hole of the first support. Therefore, when the fluid containing hard particles is metered, the friction loss of the single-screw flowmeter during working can be effectively reduced, the situation that the fluid cannot normally work due to overlarge friction force caused by accumulation of tiny particles is avoided, and the metering precision and the service life of the flowmeter are greatly ensured.
2. According to the utility model, the first shaft sleeve and the second shaft sleeve which are made of ceramic materials are arranged at the two ends of the screw shaft and are matched with the sliding bearing, so that the service life of the screw shaft can be greatly prolonged, the production cost of the screw shaft is reduced, the ceramic materials have a self-lubricating effect, the friction loss can be further reduced, and the metering precision is improved.
3. The matching surface of the sliding bearing and the first support or the second support is spherical, so that a ball pair is formed for connection, and the matching surface of the first shaft end support piece and one end surface of the shaft sleeve and the matching surface of the second shaft end support piece and two end surfaces of the shaft sleeve are spherical, so that the screw shaft has double self-aligning function during installation, and abrasion caused by abnormal work is avoided.
Drawings
FIG. 1 is a cross-sectional perspective view of the overall structure of the present utility model;
FIG. 2 is a cross-sectional, partially enlarged perspective view of a second bearing mount of the present utility model;
FIG. 3 is a cross-sectional, partially enlarged perspective view of a first bearing mount of the present utility model;
FIG. 4 is a cross-sectional perspective view of a second mount of the present utility model;
FIG. 5 is a cross-sectional perspective view of a first mount of the present utility model;
FIG. 6 is a schematic view of a second bearing mount of the present utility model discharging hard particles.
FIG. 7 is a schematic view of a bearing mount of the present utility model with hard particles being discharged.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, the single-screw flowmeter for measuring the fluid containing the hard particles comprises a bearing mounting seat II 1, a pulse signal generator 2, a shell 3, a bearing mounting seat I4, a screw 6 and a screw shaft 7.
As shown in fig. 3 and 5, the bearing mount 4 includes a first holder 12, a first shaft end support 14, a slide bearing 10, and a first sleeve 13; the first support 12 is in interference fit with the central hole of the shell 3; the first support 12 is provided with a plurality of output channels 12-2 which are uniformly distributed along the circumferential direction of the central blind hole, and the bottom of the central blind hole of the first support 12 is provided with a plurality of granule discharging holes 12-1 which are uniformly distributed along the circumferential direction and supporting holes which are coaxially arranged with the central blind hole; the first shaft sleeve 13 is supported in the central blind hole of the first support 12 through the sliding bearing 10, the contact part between the outer ring of the sliding bearing 10 and the central blind hole of the first support 12 is spherical, the first shaft end support 14 is in transition fit with the support hole of the first support 12, the spherical surface of the first shaft end support 14 extends into the central blind hole of the first support 12 and forms a spherical pair with the end surface of the first shaft sleeve 13, so that the first shaft sleeve 13 has a self-aligning function; a gap is arranged between the spherical surface of the first shaft end support piece 14 and the central blind hole of the first support seat 12; the first shaft sleeve 13 is provided with a granule discharging spiral groove; the output channel 12-2 is used for outputting fluid, and the particle discharge hole 12-1 is used for guiding out tiny hard particles entering between the sliding bearing 10 and the particle discharge spiral groove of the first shaft sleeve 13.
As shown in fig. 2 and 4, the bearing mounting seat two 1 comprises a support two 8, a shaft end support two 9, a sliding bearing 10 and a shaft sleeve two 11; the second support 8 is in interference fit with the central hole of the shell 3; n input channels 8-2 which are uniformly distributed along the circumferential direction of the central through hole are formed in the second support 8, and n is more than or equal to 3; the second shaft end supporting piece 9 is in transition fit with a hole section with smaller hole diameter of the central through hole of the second support seat 8; the second shaft sleeve 11 is supported in a hole section with larger hole diameter of the central through hole of the second support 8 through a sliding bearing 10; the spherical surface of the second shaft end supporting piece 9 stretches into a hole section with larger hole diameter of the central through hole of the second support 8, and forms a spherical pair with the end face of the second shaft sleeve 11, and the contact part between the outer ring of the sliding bearing 10 and the central through hole of the second support 8 is also spherical, so that the second shaft sleeve 11 has a self-aligning function.
Two ends of the screw shaft 7 are respectively in interference fit with the first shaft sleeve 13 and the second shaft sleeve 11, and the screw 6 is sleeved on the screw shaft 7 and is excessively matched with the screw shaft 7; the screw shaft 7 is fixed with a pulse signal generator 2 near the second shaft sleeve 11 (the wiring of the pulse signal generator can be led out from the opening of the shell 3).
As a preferred embodiment, the spherical recess of the end face of the sleeve one 13 forms a ball pair with the spherical face of the shaft end support one 14.
As a preferred embodiment, the second support 8 is further provided with n inclined granule discharging channels 8-1 uniformly distributed along the circumferential direction of the central through hole, and each input channel 8-2 is communicated with a hole section with larger hole diameter of the central through hole of the second support 8 through one inclined granule discharging channel 8-1; the communication port of the inclined granule discharging channel 8-1 and the central through hole of the second support seat 8 is positioned in a gap between the spherical surface of the second shaft end support piece 9 and the central through hole of the second support seat 8; the second shaft sleeve 11 is provided with a granule discharging spiral groove. The inlet channel 8-2 is used for inputting fluid, and the inclined particle discharge channel 8-1 is used for guiding out tiny hard particles entering between the sliding bearing 10 and the particle discharge spiral shaft section of the shaft sleeve 11.
As a preferred embodiment, the spherical recess of the end face of the second sleeve 11 and the spherical surface of the second shaft end support 9 form a ball pair.
As a preferred embodiment, a screw sleeve 5 is also included; the screw sleeve 5 is in interference fit with the central hole of the shell 3 and in clearance fit with the screw 6.
More preferably, the screw sleeve 5, the screw 6, the first sleeve 13, the first shaft end support 14, the second shaft end support 9, the second sleeve 11 and the sliding bearing are all made of ceramic materials.
The single-screw flowmeter for measuring the fluid containing the hard particles has the following working principle:
the fluid to be measured, which is introduced into the shell 3, flows in through the input channel 8-2 of the bearing mounting seat II 1, acts on the spiral surface of the screw rod 6, generates torque to drive the screw rod 6 to rotate, and in the rotating process, the fluid is output out of the shell 3 along the axis of the screw rod 6 through the output channel 12-2 of the bearing mounting seat I4, and the measuring of the fluid is realized by measuring the rotation number of the screw rod 6 through the pulse signal generator 2 (the fluid flow flowing through each rotation of the screw rod 6 is kept consistent). As shown in fig. 6, before the fluid containing hard particles enters the input end of the screw rod 6, some hard particles may be squeezed into the fit gap between the second sleeve 11 and the sliding bearing 10, if not discharged in time, the fit surface may be worn, and the particle discharge spiral groove of the second sleeve 11 in the present utility model may convey the hard particles into the gap between the spherical surface of the second shaft end support 9 and the central through hole of the second support 8; when fluid flows through the input channel 8-2 of the second support 8, a low pressure is generated in the inclined particle discharge channel 8-1 of the second support 8, and hard particles between the spherical surface of the second shaft end support 9 and the central through hole of the second support 8 are sucked into the input channel 8-2 of the second support 8 through the inclined particle discharge channel 8-1. Further, as shown in fig. 7, when the fluid containing hard particles flows out from the screw 6, some hard particles enter the fit gap between the first sleeve 13 and the sliding bearing 10, and if not discharged in time, the fit surface will be worn out, but in the present utility model, the particle discharge spiral groove formed on the first sleeve 13 can discharge the tiny hard particles between the first sleeve 13 and the sliding bearing 10 in time under the rotation of the screw 6, and the tiny hard particles are conveyed to the output end of the housing 3 through the particle discharge hole 12-1 of the first support 12.
Claims (5)
1. The utility model provides a single screw flowmeter that measurement contains stereoplasm granule fluid, includes bearing mount pad two, pulse signal generator, casing, bearing mount pad one and screw rod, its characterized in that: the screw shaft is also included; the first bearing mounting seat comprises a first support, a first shaft end supporting piece, a sliding bearing and a first shaft sleeve; the first support is in interference fit with the central hole of the shell; the first support is provided with a plurality of output channels uniformly distributed along the circumferential direction of the central blind hole, and the bottom of the first support is provided with a plurality of granule discharging holes uniformly distributed along the circumferential direction and supporting holes coaxially arranged with the central blind hole; the first shaft sleeve is supported in the central blind hole of the first support through a sliding bearing, and the contact part between the outer ring of the sliding bearing and the central blind hole of the first support is a spherical surface; the first shaft end supporting piece is in transition fit with the supporting hole of the first support; the spherical surface of the first shaft end support piece extends into the central blind hole of the first support seat and forms a spherical pair with the end surface of the first shaft sleeve; a gap is arranged between the spherical surface of the first shaft end support piece and the central blind hole of the first support; the first shaft sleeve is provided with a granule discharging spiral groove;
the second bearing mounting seat comprises a second support, a second shaft end supporting piece, a sliding bearing and a second shaft sleeve; the second support is in interference fit with the central hole of the shell; n input channels are uniformly distributed along the circumference of the central through hole and are more than or equal to 3; the second shaft end support piece is in transition fit with a hole section with smaller hole diameter of the central through hole of the second support; the second shaft sleeve is supported in a hole section with larger hole diameter of the central through hole of the second support through a sliding bearing; the spherical surface of the second shaft end support piece extends into a hole section with larger aperture of the second central through hole of the support, a spherical pair is formed by the spherical surface of the second shaft end support piece and the end surface of the second shaft sleeve, and the contact part between the outer ring of the sliding bearing and the second central through hole of the support is also a spherical surface;
the two ends of the screw shaft are respectively in interference fit with the first shaft sleeve and the second shaft sleeve, and the screw is sleeved on the screw shaft and is in excessive fit with the screw shaft; the screw shaft is fixed with a pulse signal generator near the two positions of the shaft sleeve.
2. The single screw flow meter for metering a fluid containing hard particles of claim 1, wherein: the spherical groove of one end surface of the shaft sleeve and the spherical surface of the first shaft end support piece form a spherical pair.
3. The single screw flow meter for metering a fluid containing hard particles of claim 1, wherein: n inclined granule discharging channels are uniformly distributed along the circumferential direction of the central through hole, and each input channel is communicated with a hole section with larger hole diameter of the central through hole of the second support through one inclined granule discharging channel; the communication port between the inclined particle discharging channel and the central through hole of the second support is positioned in a gap between the spherical surface of the second shaft end support and the central through hole of the second support; the second shaft sleeve is provided with a granule discharging spiral groove.
4. The single screw flow meter for metering a fluid containing hard particles of claim 1, wherein: the spherical groove of the two end surfaces of the shaft sleeve and the spherical surface of the second shaft end support piece form a spherical pair.
5. The single screw flow meter for metering a fluid containing hard particles of claim 1, wherein: the screw rod sleeve is also included; the screw rod sleeve is in interference fit with the central hole of the shell and in clearance fit with the screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321749704.XU CN220322457U (en) | 2023-07-05 | 2023-07-05 | Single screw flowmeter for metering fluid containing hard particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321749704.XU CN220322457U (en) | 2023-07-05 | 2023-07-05 | Single screw flowmeter for metering fluid containing hard particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220322457U true CN220322457U (en) | 2024-01-09 |
Family
ID=89415472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321749704.XU Active CN220322457U (en) | 2023-07-05 | 2023-07-05 | Single screw flowmeter for metering fluid containing hard particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220322457U (en) |
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2023
- 2023-07-05 CN CN202321749704.XU patent/CN220322457U/en active Active
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