Detection device for displacement of valve core of proportional direction valve
阅读说明:本技术 用于比例方向阀阀芯位移的检测装置 (Detection device for displacement of valve core of proportional direction valve ) 是由 汤波 方敏 吴建磊 叶建 刘琥铖 于 2020-04-30 设计创作,主要内容包括:本公开提供了一种用于比例方向阀阀芯位移的检测装置,属于液压元件测试技术领域。所述检测装置包括端盖、调节杆和限位座,端盖为筒状结构件,端盖包括开口端和密封端,开口端用于可拆卸地安装在阀体上,端盖的内腔中具有弹性件,弹性件的一侧用于固定在阀芯的一端上,弹性件的另一侧与密封端相抵,调节杆和密封端密封且滑动配合,调节杆的第二端套设有调节螺母,调节螺母的外周壁上具有标记,限位座包括支撑板和限位板,限位板位于支撑板上,限位板用于止挡调节螺母,且调节螺母位于端盖和限位板之间。本公开通过该检测装置,可以实现对阀芯的微小增量位移的控制,从而使得流量微动特性曲线可靠性较高。(The utility model provides a detection apparatus for be used for displacement of proportional direction valve case belongs to hydraulic component test technical field. The detection device comprises an end cover, an adjusting rod and a limiting seat, the end cover is a cylindrical structural part, the end cover comprises an opening end and a sealing end, the opening end is used for being detachably installed on the valve body, an elastic part is arranged in an inner cavity of the end cover, one side of the elastic part is used for being fixed to one end of the valve core, the other side of the elastic part is abutted to the sealing end, the adjusting rod is sealed to the sealing end and is in sliding fit with the sealing end, a second end of the adjusting rod is sleeved with an adjusting nut, marks are arranged on the outer peripheral wall of the adjusting nut, the limiting seat comprises a supporting plate and a limiting plate, the limiting plate is located on. According to the detection device, the control on the tiny incremental displacement of the valve core can be realized, so that the reliability of the flow micro-motion characteristic curve is high.)
1. The detection device for the displacement of the valve core of the proportional direction valve is characterized by comprising an end cover (1), an adjusting rod (2) and a limiting seat (3);
the end cover (1) is a cylindrical structural part, the end cover (1) comprises an opening end (11) and a sealing end (12), the opening end (11) is detachably mounted on the valve body (120), an elastic part (13) is arranged in an inner cavity of the end cover (1), one side of the elastic part (13) is mounted on one end of the valve core (110), and the other side of the elastic part (13) is abutted to the sealing end (12);
the adjusting rod (2) is in sealing and sliding fit with the sealing end (12), the first end of the adjusting rod (2) is located in the inner cavity of the end cover (1) and is used for being in contact with the valve core (110), the second end of the adjusting rod (2) is sleeved with an adjusting nut (21), the adjusting rod (2) is in threaded fit with the adjusting nut (21), and a mark (211) is arranged on the outer peripheral wall of the adjusting nut (21);
spacing seat (3) include backup pad (31) and limiting plate (32), a side of backup pad (31) with sealed end (12) dorsad the terminal surface of open end (11) links together, limiting plate (32) are located on backup pad (31), limiting plate (32) are used for the backstop adjusting nut (21), just adjusting nut (21) are located end cover (1) with between limiting plate (32).
2. The detection device according to claim 1, characterized in that the limiting seat (3) is provided with a mounting plate (33), a first plate surface of the mounting plate (33) is vertically connected with the support plate (31), the other plate surface of the mounting plate (33) is detachably connected with the end surface of the sealing end (12) facing away from the open end (11), and the adjusting rod (2) is axially movably inserted into the mounting plate (33).
3. The detection device according to claim 2, characterized in that the second plate surface of the assembly plate (33) is provided with a positioning convex ring (331), the end surface of the sealing end (12) facing away from the open end (11) is coaxially provided with an annular groove (14), and the positioning convex ring (331) is positioned in the annular groove (14).
4. The detection device according to claim 1, characterized in that a locking nut (22) is further coaxially sleeved on the outer wall of the adjusting rod (2), the locking nut (22) is in threaded fit with the adjusting rod (2), and the locking nut (22) is located on one side of the adjusting nut (21) facing the end cover (1).
5. The detecting device according to claim 1, characterized in that the supporting plate (31) is provided with a guiding plate (311), the guiding plate (311) is perpendicular to the supporting plate (31) and fixed together, the guiding plate (311) is provided with a guiding groove (3111), the guiding groove (3111) is arranged coaxially with the adjusting rod (2), and the adjusting rod (2) is slidably inserted in the guiding groove (3111).
6. The detecting device for detecting the rotation of the motor rotor as claimed in claim 1, wherein a fixing plate (312) is arranged on the other side of the supporting plate (31), the fixing plate (312) is vertically connected with the supporting plate (31), a displacement sensor (3121) is arranged on the fixing plate (312), and a magnetic ring (24) is arranged on the second end face of the adjusting rod (2).
7. The detection device as claimed in claim 6, wherein the second end of the adjustment rod (2) has a coaxially arranged blind hole (23), the blind hole (23) is a strip-shaped hole, the copper tube (3122) of the displacement sensor (3121) is inserted into the blind hole (23), and the magnetic ring (24) is movably sleeved on the copper tube (3122) of the displacement sensor (3121).
8. The detection device according to claim 1, characterized in that the sealing end (12) is provided with a coaxially arranged ring body (121), the ring body (121) is positioned in the inner cavity of the end cover (1), and the inner wall of the ring body (121) is in sliding fit with the outer peripheral wall of the adjusting rod (2).
9. The detection device according to claim 8, characterized in that the inner peripheral wall of the ring body (121) has a sealing ring (1211), the sealing ring (1211) being interposed between the outer peripheral wall of the adjustment rod (2) and the ring body (121).
10. The detecting device according to any one of claims 1 to 9, characterized in that the end cap (1) further comprises an elastic member mounting seat (111) for fixedly mounting on the valve core (110), and one side of the elastic member (13) is mounted on the valve core (110) through the elastic member mounting seat (111).
Technical Field
The disclosure belongs to the technical field of hydraulic element testing, and particularly relates to a detection device for valve core displacement of a proportional direction valve.
Background
The proportional directional valve is a hydraulic element capable of controlling the direction of oil and flow, and is widely applied to a hydraulic control system.
Before leaving a factory, the proportional directional valve needs to be subjected to a flow micromotion characteristic test, namely, the micro incremental displacement of the valve core is controlled, and then a flow micromotion characteristic curve is drawn according to the measured valve core displacement and the flow so as to guide subsequent use. In the related technology, the valve core is driven to move through hydraulic pressure, so that the displacement and the flow of the valve core are recorded, and the drawing of a micro characteristic curve is finally realized.
However, the displacement increment of the method is large, the control of the tiny incremental displacement of the valve core is not easy to realize, and the flow error of the obtained proportional directional valve is large, so that the reliability of the drawn flow inching characteristic curve is low.
Disclosure of Invention
The embodiment of the disclosure provides a detection device for valve core displacement of a proportional direction valve, which can realize control on micro incremental displacement of the valve core, so that the reliability of a flow micro-motion characteristic curve is higher. The technical scheme is as follows:
the embodiment of the disclosure provides a detection device for valve core displacement of a proportional direction valve, which comprises an end cover, an adjusting rod and a limiting seat;
the end cover is a cylindrical structural part and comprises an opening end and a sealing end, the opening end is detachably arranged on the valve body, an elastic part is arranged in an inner cavity of the end cover, one side of the elastic part is arranged on one end of the valve core, and the other side of the elastic part abuts against the sealing end;
the adjusting rod and the sealing end are in sealing and sliding fit, the first end of the adjusting rod is located in the inner cavity of the end cover and is used for being in contact with the valve element, the second end of the adjusting rod is sleeved with an adjusting nut, the adjusting rod is in threaded fit with the adjusting nut, and the outer peripheral wall of the adjusting nut is provided with a mark;
the limiting seat comprises a supporting plate and a limiting plate, one side edge of the supporting plate is connected with the end face, back to the opening end, of the sealing end, the limiting plate is located on the supporting plate, the limiting plate is used for stopping the adjusting nut, and the adjusting nut is located between the end cover and the limiting plate.
Optionally, an assembly plate is arranged on the limiting seat, a first plate surface of the assembly plate is vertically connected with the support plate, the other plate surface of the assembly plate is detachably connected with an end surface of the sealing end, which faces away from the opening end, of the sealing end, and the adjusting rod is axially movably inserted into the assembly plate.
Optionally, a second plate surface of the assembling plate is provided with a positioning convex ring, the sealing end faces back to the opening end are coaxially provided with an annular groove, and the positioning convex ring is located in the annular groove.
Optionally, the outer wall of the adjusting rod is further coaxially sleeved with a locking nut, the locking nut is in threaded fit with the adjusting rod, and the locking nut is located on one side, facing the end cover, of the adjusting nut.
Optionally, the support plate is provided with a guide plate, the guide plate is perpendicular to the support plate and fixed together, the guide plate is provided with a guide groove, the guide groove and the adjusting rod are coaxially arranged, and the adjusting rod is slidably inserted into the guide groove.
Optionally, a fixing plate is disposed on the other side of the supporting plate, the fixing plate is vertically connected to the supporting plate, a displacement sensor is disposed on the fixing plate, and a magnetic ring is disposed on the second end face of the adjusting rod.
Optionally, the second end of the adjusting rod is provided with a blind hole which is coaxially arranged, the blind hole is a strip-shaped hole, a copper pipe of the displacement sensor is inserted into the blind hole, and the magnetic ring is movably sleeved on the copper pipe of the displacement sensor.
Optionally, a ring body is coaxially arranged on the sealing end, the ring body is located in the inner cavity of the end cover, and the inner wall of the ring body is in sliding fit with the outer circumferential wall of the adjusting rod.
Optionally, a sealing ring is arranged on the inner peripheral wall of the ring body, and the sealing ring is clamped between the outer peripheral wall of the adjusting rod and the ring body.
Optionally, the end cap further includes an elastic member mounting seat for being fixedly mounted on the valve core, and one side of the elastic member is mounted on the valve core through the elastic member mounting seat.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
for the detection device for the displacement of the valve core of the proportional directional valve provided by the embodiment of the disclosure, when the valve core is tested to move left: the end cap includes an open end for removably mounting on the left side of the valve body and a sealed end to enable connection of the end cap to the valve body. In addition, adjust the pole and seal end sealing and sliding fit, and the first end of adjusting the pole is arranged in the inner chamber of end cover and is used for contacting with the case to control oil inlet drive valve core through right side liquid accuse valve gap and move left, can drive and adjust the pole and move left.
Furthermore, the second end cover of adjusting the pole is equipped with adjusting nut, and adjusts pole and adjusting nut screw-thread fit, has the mark on adjusting nut's the periphery wall. Because the screw pitch of the adjusting nut is fixed (when the adjusting nut rotates for one circle, the displacement length of the adjusting nut is the screw pitch length), the axial displacement of the adjusting nut can be determined through the number of turns of the rotation mark (the number of turns of the adjusting nut and the axial displacement of the adjusting nut are in a linear relation). Wherein the markings are easily referenced to determine the number of turns of the adjusting nut so that control of small displacements of the adjusting nut to the left can be achieved by turning the adjusting nut. And, one side of backup pad links together with the terminal surface of sealed end back to the open end, and the limiting plate is located the backup pad to realize spacing to adjusting nut through the limiting plate, and then realize spacing to the case.
Then, when the valve core is driven to move without hydraulic oil, the valve core, the adjusting rod and the adjusting nut are all kept at the initial positions, and the adjusting nut is just contacted with the limiting plate at the moment. When the valve core is subjected to a flow micro-motion characteristic test through hydraulic oil, the adjusting nut is rotated to a certain number of turns and is moved rightwards, namely the adjusting nut moves slightly compared with the initial position. Then move left through hydraulic oil drive valve core to make adjusting nut remove to the limiting plate and offset, the flow of record case this moment, and adjusting nut displacement left this moment is adjusting nut's small displacement promptly, this small displacement also is the small incremental displacement of case, thereby also can obtain the flow under the small incremental displacement of case. In addition, after the sample is finished for one time, the elastic piece drives the valve core to reset. And subsequently, the adjusting nut is rotated to other turns. And repeating the steps to obtain the flow rate of the plurality of valve cores under the tiny incremental displacement, and further obtain a micro-motion characteristic curve of the valve cores moving leftwards.
Similarly, when the valve core right movement test is carried out: and the valve core is driven to move rightwards by the control oil inlet of the left hydraulic control valve cover, so that a micromotion characteristic curve of rightward movement of the valve core is obtained.
That is to say, the detection device provided by the embodiment of the present disclosure realizes the control of the minute incremental displacement of the valve element through the adjusting nut, so that the obtained flow error of the proportional directional valve is small, and the reliability of the flow inching characteristic curve is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a proportional directional valve provided by an embodiment of the present disclosure;
FIG. 2 is an assembled cross-sectional view of a detection device for proportional directional valve spool displacement provided by an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of an adjusting nut provided by an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a limiting seat provided in the embodiment of the present disclosure;
FIG. 5 is a cross-sectional view of an end cap provided by an embodiment of the present disclosure;
FIG. 6 is a right side view of a spacing block provided by embodiments of the present disclosure;
FIG. 7 is a schematic top view of a detection apparatus provided in an embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of a guide plate provided in an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of an adjustment lever according to an embodiment of the present disclosure.
The symbols in the drawings represent the following meanings:
1. an end cap; 11. an open end; 12. sealing the end; 121. a ring body; 1211. a seal ring; 13. an elastic member; 14. an annular groove; 15. an oil outlet;
2. adjusting a rod; 21. adjusting the nut; 211. marking; 22. locking the nut; 23. blind holes; 24. a magnetic ring; 25. a first adjusting lever; 26. a second adjusting lever;
3. a limiting seat; 31. a support plate; 311. a guide plate; 3111. a guide groove; 312. a fixing plate; 3121. a displacement sensor; 3122. a copper pipe; 3123. a connecting bolt; 32. a limiting plate; 33. assembling a plate; 331. positioning the convex ring; 332. assembling a bolt; 333. a notch;
110. a valve core; 111. an elastic member mounting base; 120. a valve body; 130. a hydraulic control valve cover; 131. controlling the oil inlet.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a cross-sectional view of a proportional directional valve provided in an embodiment of the present disclosure, and as shown in fig. 1, the proportional directional valve includes a
Fig. 2 is an assembly cross-sectional view of a detection device for valve core displacement of a proportional directional valve according to an embodiment of the present disclosure, and as shown in fig. 2, the detection device includes an end cover 1, an
The end cover 1 is a cylindrical structural member, the end cover 1 includes an opening
The adjusting
Spacing
For the detection device for the displacement of the valve core of the proportional directional valve provided by the embodiment of the disclosure, when the
Further, the second end of the adjusting
Then, when the non-hydraulic-oil driven
Similarly, when the
That is to say, the detection device provided by the embodiment of the present disclosure realizes control over the minute incremental displacement of the
It should be noted that the shape of the end cap 1 substantially conforms to the shape of the pilot operated
It should be noted that the
For example, as shown in fig. 3, the
In the present embodiment, if the stroke of the
In other embodiments of the present disclosure, the number of the through holes may be 4, and the
Referring again to fig. 2, the cap 1 further includes an
In the above embodiment, the
Fig. 4 is a schematic structural diagram of a limiting seat provided in an embodiment of the present disclosure, and as shown in fig. 4, a mounting
In the above embodiment, the
It should be noted that, because there is no need for sealing or precise fitting between the
With continued reference to fig. 4, the second plate surface of the
In the above embodiment, the positioning
Fig. 6 is a right side view of the limiting seat provided by the embodiment of the disclosure, and as shown in fig. 2, a mounting
In the above embodiment, the mounting
Illustratively, the mounting
Fig. 7 is a schematic top view of the detection apparatus provided in the embodiment of the present disclosure, and as shown in fig. 7, a locking
In the above embodiment, the
Illustratively, the
Fig. 8 is a schematic structural diagram of a guide plate according to an embodiment of the present disclosure, as shown in fig. 8, a
In the above embodiment, the
Illustratively, a small clearance fit is used between the
In the present embodiment, the structures of the
Illustratively, the
This may increase the structural strength of the connection.
In this embodiment, the number of the supporting
Referring to fig. 2 and 7 again, the other side of the supporting
In the above embodiment, the fixing
Illustratively, when the
Fig. 9 is a schematic structural diagram of the adjusting lever provided in the embodiment of the present disclosure, and as shown in fig. 7, the second end of the adjusting
In the above embodiment, the
Optionally, the
In the above embodiment, the
Illustratively, the connecting
In this embodiment, the adjusting
Referring again to fig. 4, the sealing
In the above embodiment, the
Optionally, the
In the above embodiment, the
Illustratively, the
In the present embodiment, a
Illustratively, an
The test procedure of the test apparatus is briefly described below:
when detecting the displacement of the
When the displacement of the
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
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