Summary of the invention
The present invention provides a kind of central rotation axle unit in order to address the above problem, and the liquid viscosity measuring instrument that comprises this central rotation axle unit.
The present invention has adopted following structure to achieve these goals.
<structure 1 〉
The invention provides a kind of central rotation axle unit, be used for to measure liquid viscosity and around the central axis rotation, and be connected with measurement rotor unit in being arranged on fluid to be measured, it is characterized in that, comprising: turning axle top; The turning axle bottom that is connected with the measurement rotor unit; And the balance curved bar section that is fixedly connected with the turning axle bottom with turning axle top respectively, wherein balance curved bar section comprises: the curved bar part that is positioned at central axis one side; Partly combine with curved bar and be positioned at the counterbalance weight of central axis opposite side; At least one is arranged on the first balanced regulating screw on the curved bar part; And be arranged on the second balanced regulating screw on the counterbalance weight, the first balanced regulating screw and the second balanced regulating screw respectively along with the perpendicular plane of central axis in two orthogonal directions move so that the center of gravity of central rotation axle unit on central axis.
In central rotation axle unit of the present invention, can also have such feature: wherein, curved bar partly is half I shape, comprise transverse bar, lower transverse bar and be connected with an end one of upper transverse bar and lower transverse bar respectively and be in vertical bar away from the outside of central axis, counterbalance weight is installed in the other end of lower transverse bar, lower transverse bar has perpendicular first screw that runs through of half i shaped cross section of a length direction and curved bar part, the first balanced regulating screw is arranged on the first screw, the second screw that counterbalance weight has a length direction and the first screw is perpendicular and intersect vertically with central axis, the second balanced regulating screw is arranged on the second screw.
In addition, in central rotation axle unit of the present invention, can also have such feature: wherein, curved bar partly is half I shape, comprise transverse bar, lower transverse bar and be connected with an end one of upper transverse bar and lower transverse bar respectively and be in vertical bar away from the outside of central axis, counterbalance weight is installed in the other end of lower transverse bar, lower transverse bar has the first screw that half i shaped cross section of two length directions and curved bar part is perpendicular and be oppositely arranged, the first balanced regulating screw is two, be separately positioned on two the first screws, the second screw that counterbalance weight has a length direction and the first screw is perpendicular and intersect vertically with central axis, the second balanced regulating screw is arranged on the first screw.
In addition, in central rotation axle unit of the present invention, can also have such feature: wherein, the turning axle bottom comprises a universal linker.
<structure 2 〉
The invention provides a kind of liquid viscosity measuring instrument, be used for measuring liquid viscosity, it is characterized in that having: the central rotation axle unit around the central axis rotation; And a measurement rotor unit that is arranged in the fluid to be measured, wherein, the central rotation axle unit comprises: turning axle top; The turning axle bottom that is connected with the measurement rotor unit; And the balance curved bar section that is fixedly connected with the turning axle bottom with turning axle top respectively, balance curved bar section comprises: the curved bar part that is positioned at central axis one side; Partly combine with curved bar and be positioned at the counterbalance weight of central axis opposite side; Be arranged at least one first balanced regulating screw on the curved bar part; And be arranged on the second balanced regulating screw on the counterbalance weight, the first balanced regulating screw and the second balanced regulating screw respectively along with the perpendicular plane of central axis in two orthogonal directions move so that the center of gravity of central rotation axle unit on central axis.
In liquid viscosity measuring instrument of the present invention, can also have such feature: wherein, curved bar partly is half I shape, comprise transverse bar, lower transverse bar and be connected with an end one of upper transverse bar and lower transverse bar respectively and be in vertical bar away from the outside of central axis, counterbalance weight is installed in the other end of lower transverse bar, lower transverse bar has perpendicular first screw that runs through of half i shaped cross section of a length direction and curved bar part, the first balanced regulating screw is arranged on the first screw, counterbalance weight has a length direction and the first screw and thinks the second screw vertical and that intersect vertically with central axis, and the second balanced regulating screw is arranged on the second screw.
In addition, in liquid viscosity measuring instrument of the present invention, can also have such feature: wherein, curved bar partly is half I shape, comprise transverse bar, lower transverse bar and be connected with an end one of upper transverse bar and lower transverse bar respectively and be in vertical bar away from the outside of central axis, counterbalance weight is installed in the other end of lower transverse bar, lower transverse bar has the first screw that half i shaped cross section of two length directions and curved bar part is perpendicular and be oppositely arranged, the first balanced regulating screw is two, be separately positioned on two the first screws, the second screw that counterbalance weight has a length direction and the first screw is perpendicular and intersect vertically with central axis, the second balanced regulating screw is arranged on the first screw.
In addition, in liquid viscosity measuring instrument of the present invention, can also have such feature: wherein, the turning axle bottom comprises a universal linker.
Effect and the effect of invention
According to central rotation axle unit of the present invention and liquid viscosity measuring instrument, because be provided with counterbalance weight, the first balanced regulating screw and the second balanced regulating screw in the curved bar part, so that the center of gravity of centre rotational axis unit can be positioned on the central axis accurately, therefore, the central rotation axle unit can be eliminated off-centre and rock when being rotated motion, improve the measuring accuracy of instrument, avoid the too early damage of pivot, and in the situation that do not change in the past apparatus structure and size, measuring accuracy and the serviceable life of having improved instrument.
In addition, because the turning axle bottom comprises a universal linker, therefore, can further improve the stability of central rotation axle unit, thereby can further prolong the serviceable life of instrument, and can further improve the precision of test, reach the effect that further reduces test error.
Embodiment
Referring to accompanying drawing central rotation axle unit involved in the present invention and liquid viscosity measuring instrument are elaborated.
Fig. 1 is the liquid viscosity measuring instrument structural representation in an embodiment that the present invention relates to.
As shown in Figure 1, liquid viscosity measuring instrument 10 has driver element 11, motor 12, counting scale 13, hairspring 14, pointer 15, base 16, central axle sleeve 17, central rotation axle unit 18, bearing bridge 19, V-type agate bearing 20 and measures rotor unit 21.
Driver element 11 is used for drive motor 12 and is rotated.
Motor 12 is used for driving counting scale 13 and is rotated.
Counting scale 13 links to each other with motor 12, and links to each other with an end of hairspring 14, is labeled with scale on the counting scale 13, and this scale represents the windup-degree of the hairspring under the particular factor.
One end of hairspring 14 links to each other with counting scale 13, and its other end and central rotation axle unit 18 are fixedly linked.
The upper end of pointer 15 is positioned at the top of counting scale 13, is used to indicate scale, and its lower end is positioned at the below of counting scale 13 and is fixedly linked with central rotation axle unit 18 and hairspring 14.
Base 16 is positioned at the below of pointer 15, and links to each other with counting scale 13.
Central axle sleeve 17 is fixedly linked with base 16.
Central rotation axle unit 18 is connected with measurement rotor unit in being arranged on fluid to be measured, is used for measuring liquid viscosity and around the central axis rotation.Central rotation axle unit 18 comprises: turning axle top 22, balance curved bar section 23 and turning axle bottom 24.
The middle part of counting scale 13, base 16 and central axle sleeve 17 is run through on turning axle top 22, but it does not link to each other with counting scale 13, base 16 and central axle sleeve 17, and turning axle top 22 links to each other with hairspring 14 and is fixedly linked with the lower end of pointer 15.Turning axle top 22 comprises axle journal 25, axostylus axostyle 26 and pivot 27, and axostylus axostyle 26 is fixedly linked the lower end that pivot 27 is positioned at the inside of axostylus axostyle 26 and extends axostylus axostyle 26 with the lower end of pointer 15 and the other end of hairspring 14.
Balance curved bar section 23 is fixedly connected with turning axle bottom 24 with turning axle top 22 respectively.
Turning axle bottom 24 is connected with measurement rotor unit 20.
Fig. 2 is the central rotation axle unit structural representation in an embodiment that the present invention relates to.
Fig. 3 is the central rotation axle unit explosive view in an embodiment that the present invention relates to.
Shown in Fig. 2,3, balance curved bar section 23 comprises: curved bar part 28, counterbalance weight 29, first balanced regulating screw 30 and second balanced regulating screw 31.
Curved bar part 28 is arranged in a side of the central axis shown in Fig. 2 dot-and-dash line (imaginary line).Shown in Fig. 2,3, curved bar part 28 is half I shape, comprises 32, the first times transverse bars 33 of transverse bar and the first vertical bar 34 on first.Transverse bar 32 is positioned at the top of pivot 27 on first, and is fixedly connected with axostylus axostyle 26.First time transverse bar 33 is fixedly connected with turning axle bottom 24, it has first a screw 33a and second a screw 33b, the first screw 33a in the longitudinal direction with perpendicular the running through of half i shaped cross section of curved bar part 28, the second screw 33b is at length direction and the first screw 33a is perpendicular and intersect vertically with central axis shown in dot-and-dash line among Fig. 2.The first vertical bar 34 respectively with transverse bar on first 32 be connected an end one of time transverse bar 33 and be connected and be in the outside away from the central axis shown in dot-and-dash line among Fig. 2.
Counterbalance weight 29 is installed in the other end of first time transverse bar 33, namely, be arranged in the opposite side of the central axis shown in Fig. 2 dot-and-dash line.Counterbalance weight 29 has the 3rd screw 29a of a setting corresponding with the second screw 33b, the 3rd screw 29a is connected with the second screw 33b, namely, the 3rd screw 29a is also perpendicular with the first screw 33a and intersect vertically with central axis shown in dot-and-dash line among Fig. 2 in the longitudinal direction.
The first balanced regulating screw 30 is arranged on the first screw 33a.The second balanced regulating screw 31 is arranged on the 3rd screw 29a and extends into the second screw 33b.The first balanced regulating screw 30 and the second balanced regulating screw 31 respectively along with the perpendicular plane of the central axis shown in dot-and-dash line among Fig. 2 in two orthogonal directions move so that the center of gravity of central rotation axle unit 18 on central axis.
Shown in Fig. 2,3, turning axle bottom 24 comprises a universal linker 35, and universal linker 35 comprises: a universal chain extension bar 36, first a forked type joint 37, first pivot pin 38, a universal chained block 39, second pivot pin 40, second a forked type joint 41 and a rotor chain extension bar 42.The top of universal chain extension bar 36 is fixedly connected with turning axle bottom 24, the bottom of universal chain extension bar 36 links to each other with the top of the first forked type joint 37, the top tabling of the bottom of the first forked type joint 37 and universal chained block 39, and the top of the bottom of the first forked type joint 37 and universal chained block 39 is fixedly linked by the first pivot pin 38, the top tabling of the bottom of universal chained block 39 and the second forked type joint 41, and the top of the bottom of universal chained block 39 and the second forked type joint 41 is fixedly linked by the second pivot pin 40, and rotor chain extension bar 42 is connected with measurement rotor unit 20.
Fig. 4 is central rotation axle unit and the bracing strut structural representation in an embodiment that the present invention relates to.
Shown in Fig. 1,4, bearing bridge 19 is fixedly linked with the bottom of central axle sleeve 17, is used for V-type agate bearing 20 is supported, and bearing bridge 19 is half I shape corresponding with curved bar part 28, comprise 43, the second times transverse bars 44 of transverse bar and the second vertical bar 45 on second.Transverse bar 43 is fixedly linked with the bottom of central axle sleeve 17 on second, and is positioned at the top of transverse bar 32 on first.Second time transverse bar 44 is positioned at the below of pivot 27, the top of first time transverse bar 33, namely, second time transverse bar 44 be arranged between pivot 27 and the first time transverse bar 33 second time transverse bar 44.The second vertical bar 45 respectively with second on transverse bar 43 be connected an end one of time transverse bar 44 and be connected.
V-type agate bearing 20 be arranged at pivot 27 under, the middle body of V-type agate bearing 20 is a V-shaped groove, namely, pivot 27 hangs on the centre top of V-shaped groove, the top of the bottom of V-type agate bearing 20 and second time transverse bar 44 is fixedly linked.
The top of measuring rotor unit 21 is connected with rotor chain extension bar 42, and its underpart is arranged in the fluid to be measured.
In the liquid viscosity measuring instrument 10 of the present embodiment, such as Fig. 1,2, shown in 3, before the work, counterbalance weight 29 is because deadweight roughly is arranged on the central axis shown in Fig. 2 dot-and-dash line the center of gravity of balance curved bar section 23, and then regulate the first balanced regulating screw 30 and the second balanced regulating screw 31, make they respectively along with the perpendicular plane of the central axis shown in dot-and-dash line among Fig. 2 in two orthogonal directions move the center of gravity of centre rotational axis unit 18 finely tuned, further adjust the center of gravity of central rotation axle unit 18, it is positioned on the central axis accurately.
Then, liquid viscosity measuring instrument 10 is started working: driver element 11 drive motor 12 are rotated, motor 12 drives counting scale 13 and is rotated, counting scale 13 drives the end rotation of hairspring 14, and drive base 16 rotations, base 16 drives central axle sleeve 17 rotations, central axle sleeve 17 drives bearing bridge 19 rotations again, drive 20 rotations of V-type agate bearing by bearing bridge 19 again, one end of hairspring 14 drives the other end rotation of hairspring 14, the other end by hairspring 14 drives axostylus axostyle 26 and is rotated around as shown in Figure 2 central axis again, axostylus axostyle 26 drives pointer 15 rotations, simultaneously, axostylus axostyle 26 drive pivots 27 are rotated around central axis as shown in Figure 2, and the central axis that drive curved bar part 28 centers on as shown in Figure 2 is rotated, driving universal chain extension bar 36 by curved bar part 28 again is rotated, universal chain extension bar 36 drives the first forked type joint 37 and is rotated, the first forked type joint 37 drives the first pivot pin 38 and is rotated, the first pivot pin 38 drives universal chained block 39 and is rotated, universal chained block 39 drives the second pivot pin 40 and is rotated, the second pivot pin 40 drives the second forked type joint 41 and is rotated, the second forked type joint 41 rotor driven chain extension bars 42 are rotated around central axis as shown in Figure 2, at last, driving measurement rotor unit 21 by rotor chain extension bar 42 is rotated in fluid to be measured.
In the above-mentioned course of work, rotor chain extension bar 42 is subject to the viscosity resistance of liquid, can hinder the rotation of rotor chain extension bar 42, this moment, hairspring produced moment of torsion, contend with viscosity resistance, when moment of torsion and viscosity resistance reach balance, at this moment pointer 15 is at the corresponding scale of counting scale 13 indications, namely, pointer 15 indicates the torsion angle of the hairspring under the particular factor, then the torsion angle with hairspring is multiplied by the viscosity that particular factor namely obtains liquid.
As mentioned above, because be provided with counterbalance weight 29, the first balanced regulating screw 30 and the second balanced regulating screw 31 in curved bar part 28, so that the center of gravity of centre rotational axis unit 18 can be positioned on the central axis accurately, therefore, central rotation axle unit 18 can not produce off-centre and rock when being rotated motion, improve the stability of central rotation axle unit 18, thereby can avoid pivot 27 and V-type agate bearing 20 to collide.
In addition, because turning axle bottom 24 comprises a universal linker, therefore, can further improve the stability of central rotation axle unit 18.
The effect of embodiment and effect
Central rotation axle unit 18 and the liquid viscosity measuring instrument 10 related according to the present embodiment, because be provided with counterbalance weight 29 in curved bar part 28, the first balanced regulating screw 30 and the second balanced regulating screw 31, so that the center of gravity of centre rotational axis unit 18 can be positioned on the central axis accurately, therefore, central rotation axle unit 18 can not produce off-centre and rock when being rotated motion, improve the stability of central rotation axle unit 18, thereby can avoid pivot 27 and V-type agate bearing 20 to collide, not only can prolong the serviceable life of instrument, and can greatly improve the precision of test, reach the effect that reduces test error.
In addition, because turning axle bottom 24 comprises a universal linker, therefore, can further improve the stability of central rotation axle unit 18, thereby can further improve the precision of test, reach the effect that further reduces test error.
Certainly, central rotation axle unit involved in the present invention and liquid viscosity measuring instrument not merely are defined in structure in the present embodiment.
In the central rotation axle unit of the present embodiment, first time transverse bar is provided with first screw, this first screw in the longitudinal direction with perpendicular the running through of half i shaped cross section of curved bar part, the first balanced regulating screw is one, and is arranged on the first screw.According to using needs, the present invention can also adopt the central rotation axle unit with following structure: first time transverse bar is provided with two the first screws, and two the first screws are all perpendicular with half i shaped cross section of curved bar part and be oppositely arranged at length direction, the first balanced regulating screw is two, is separately positioned on two the first screws.Central rotation axle unit with this spline structure also can by regulate two the first balanced regulating screws and the second balanced regulating screw respectively along with the perpendicular plane of described central axis in two orthogonal directions move so that the center of gravity of described central rotation axle unit on described central axis, therefore, same applicable.