CN210715343U - Novel rotatory electro-hydraulic servo valve that directly drives of screw thread cartridge formula - Google Patents
Novel rotatory electro-hydraulic servo valve that directly drives of screw thread cartridge formula Download PDFInfo
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- CN210715343U CN210715343U CN201920101888.6U CN201920101888U CN210715343U CN 210715343 U CN210715343 U CN 210715343U CN 201920101888 U CN201920101888 U CN 201920101888U CN 210715343 U CN210715343 U CN 210715343U
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Abstract
The utility model provides a novel rotatory electrohydraulic servo valve that directly drives of screw thread cartridge formula, it has reduced the terminal surface through adding case end cover structure and has revealed. The direct current brushless servo motor valve comprises a direct current brushless servo motor and a valve body assembly, wherein the valve body assembly comprises a valve core, a valve sleeve, an upper end cover and a lower end cover, an output shaft of the direct current brushless servo motor is connected with an upward protruding part of a central shaft of the valve core, the direct current brushless servo motor is fixedly arranged at the upper end of the upper end cover, the valve core is arranged in an inner cavity of the valve sleeve, external threads are arranged on the peripheral surface of an outer ring of the upper end cover and used for being connected with an integrated valve block in an installing mode, and the bottom of the valve core is arranged in a central positioning hole of the lower end cover.
Description
Technical Field
The utility model relates to a technical field of electro-hydraulic servo valve specifically is a novel rotatory electro-hydraulic servo valve that directly drives of screw thread cartridge formula.
Background
The electro-hydraulic servo valve is used as a key element of an electro-hydraulic servo control system, is an electro-hydraulic conversion element and a power amplification element, connects an electric part with a hydraulic part to realize the conversion and amplification of electro-hydraulic signals, and the performance of the electro-hydraulic servo valve determines the performance of the whole electro-hydraulic servo control system to a great extent.
At present, along with the widening of the application field of the electro-hydraulic servo system, the application occasions of the robot also put forward higher requirements on the electro-hydraulic servo valve: the traditional electro-hydraulic servo valve has the defects that the traditional electro-hydraulic servo valve cannot meet the requirements again, the main stream micro electro-hydraulic servo valve products in the market are Moog 30 series, E024 series and 242 which are complex to install, and the service life of the internal elastic element of the existing electro-hydraulic servo valve cannot meet the application occasions of robots.
Therefore, in the field of robots, an electro-hydraulic servo valve with high frequency response, which is small in size, light in weight, convenient to integrate and extremely reliable in service life, especially a threaded cartridge type rotary direct-drive electro-hydraulic servo valve, is urgently needed to be developed. The direct-current servo motor is required to have a small-angle frequent start-stop function in the application field of the threaded plug-in type rotary direct-drive electro-hydraulic servo valve, and the application also belongs to the application of the direct-current servo motor in a follow-up system for frequent start-stop. The existing threaded cartridge type rotary direct-drive electro-hydraulic servo valve has the problem of large end face leakage.
Disclosure of Invention
To the above problem, the utility model provides a novel rotatory electrohydraulic servo valve that directly drives of screw thread cartridge formula, it has reduced the terminal surface through adding case end cover structure and has revealed.
A novel thread cartridge type rotary direct-drive electro-hydraulic servo valve has the technical scheme that: the valve comprises a direct current brushless servo motor and a valve body assembly, wherein the valve body assembly comprises a valve core, a valve sleeve, an upper end cover and a lower end cover, an output shaft of the direct current brushless servo motor is connected with an upward convex part of a central shaft of the valve core, the direct current brushless servo motor is fixedly arranged at the upper end of the upper end cover, the valve core is arranged in an inner cavity of the valve sleeve, external threads are arranged on the peripheral surface of an outer ring of the upper end cover and are used for being connected with an integrated valve block in an installing manner, and the bottom of the valve core is arranged in a central positioning hole of the lower end cover, the valve sleeve is provided with P ports communicated with the inner cavity from the outside, different P ports are arranged at different circumferential positions of the same plane, the inner wall of the valve sleeve is provided with two groups of inwards concave throttling cavities, namely an A cavity and a B cavity, which are arranged at different circumferential angle positions of the same plane, the valve sleeve is further provided with an A port and a B port which are communicated with the outside, the lower end cover is provided with a T port, the P port, the A port and the B port are arranged on different height planes of the valve sleeve, a valve core switching oil path structure is arranged on the outer annular wall of the valve core, and the valve core switching oil path meets the following conditions: when the servo valve is in a zero position, the port P, the port A, the port B and the port T are isolated from each other; when the valve core switching oil way is used for switching the oil way between the port P and the port B, the port T is communicated with the port B or the port A through the valve core switching oil way, and the port P and the port T are not communicated with the port A or the port B at the same time; the valve core switching oil way is characterized in that a valve core end cover is sleeved on the outer ring at the bottom of the central shaft of the valve core, lower convex positioning backstops are respectively arranged on the valve core end cover corresponding to the upper opening of the valve core switching oil way, the corresponding lower convex positioning backstops are respectively embedded in the upper opening of the valve core switching oil way and are sealed through glue, and the outer ring wall of the valve core is in clearance fit with the inner wall of the valve sleeve.
It is further characterized in that:
the periphery of the outer ring wall of the valve core is provided with two groups of symmetrically arranged oil circuit structures, each group of oil circuit structure comprises a P cavity, a T cavity, an A groove and a B groove, the corresponding positions of the outer ring wall of the valve core are respectively provided with the inward concave P cavity, T cavity, A groove and B groove, the height direction of the P cavity covers the horizontal plane of the P port and the horizontal plane of the A cavity, the P cavity is connected with the P port and the A cavity, the height direction of the T cavity covers the horizontal plane of the B cavity, the bottom of the T cavity penetrates through the valve core and is communicated with the inlet of the T port, the T cavity is connected with the T port and the B cavity, the height direction of the A groove covers the horizontal plane of the A cavity and the horizontal plane of the A port, the A groove is used for connecting one group of throttling cavities and the A port under the working state, and the height direction of the B groove covers the horizontal plane of the B cavity and the horizontal plane, the groove B is used for connecting another group of throttling cavities and a port B in a working state, the groove A, the cavity P, the groove B and the cavity T which are positioned in a plane where the cavity A is positioned are sequentially arranged at intervals and are respectively isolated through parting beads to form a group of oil circuit structures, the radian ranges corresponding to the parting beads on the two sides of the cavity P of the valve core cover the circumferential range of the corresponding cavity A on the working edge of the valve sleeve, the radian ranges corresponding to the parting beads on the two sides of the cavity T of the valve core cover the circumferential range of the corresponding cavity B on the working edge of the valve sleeve, and when the servo valve is in a zero position, the port P, the port T, the port A and the port B are isolated from each other; when the working state is in, the cavity A is communicated with the groove A or the groove B, the cavity B is communicated with the groove B or the groove A, and the oil paths are communicated and switched; a valve core end cover is sleeved on the outer ring at the bottom of the central shaft of the valve core, the valve core end cover is respectively provided with a lower convex positioning stop corresponding to the upper opening positions of the groove A and the groove B, the corresponding lower convex positioning stops are respectively embedded in the upper openings of the groove A and the groove B and are sealed by glue, and the outer ring wall of the valve core is in clearance fit with the inner wall of the valve sleeve;
the positions of the groove A and the groove B are interchanged, and the function of the whole structure is unchanged;
two oil grooves or oil cavities of the same type are arranged at two ends of the valve core with corresponding diameters, the diameter positions of the P cavity and the T cavity are mutually vertical, the diameter positions of the A cavity and the B cavity are mutually vertical, the central radian interval of the adjacent P cavity and the A cavity is 45 degrees, the number of the A cavity and the B cavity on the valve sleeve is two, the two A cavities and the two B cavities are arranged at two ends of the valve sleeve with corresponding diameters, and the diameter positions of the A cavity and the B cavity are mutually vertical;
the P cavity and the T cavity are groove bodies arranged in parallel to the central shaft of the valve core from bottom to top;
the radian ranges of the P cavity and the T cavity are the same, so that the whole structure is convenient to manufacture;
the radian ranges of the cavity A and the cavity B are the same, so that the whole structure is convenient to manufacture;
the radian range of the cavity A is larger than that of the cavity P in the plane of the cavity A;
the height plane of the port A is positioned above the height plane of the port P, and the height plane of the port B is positioned below the height plane of the port P;
the valve core end cover is sleeved at the bottom position of the central shaft, the lower end face of the valve core end cover is arranged to be tightly attached to the upper end face of the valve core main body part, the outer ring face of the valve core end cover is in clearance fit with the inner wall of the valve sleeve, and the valve core end cover is fixedly connected with the valve core main body part through mounting screws circumferentially distributed;
a GREEN ring is sleeved at a position where the convex part of the central shaft of the valve core penetrates through the upper end cover, an inner concave annular groove is arranged at a corresponding position of the upper end cover, and the GREEN ring is arranged in the inner concave annular groove;
the upper end cover is fixedly connected with the upper end ring surface of the valve sleeve through a first screw, an upper ring groove is formed in the upper end ring surface of the valve sleeve, a first sealing ring is arranged in the upper ring groove, and the first sealing ring is tightly attached to the corresponding contact surface of the upper end cover, so that the sealing between the valve sleeve and the upper end cover is realized;
the lower end cover is fixedly connected with the lower end annular surface of the valve sleeve through a second screw, an annular boss is arranged on the lower end surface of the valve sleeve, a lower annular groove is arranged on the upper end surface of the lower end cover corresponding to the annular boss, a second sealing ring is arranged in the lower annular groove, and the annular boss is embedded in the lower annular groove and is pressed on the upper end surface of the second sealing ring, so that the sealing between the valve sleeve and the lower end cover is realized.
Adopt the utility model discloses afterwards, it opens throttle chamber (A chamber, B chamber) on the valve barrel to combine together the sealed of realizing the last port that the case switched the oil circuit through case end cover and case, reduced the leakage quantity of terminal surface greatly, reduced the rotatory leakage quantity that directly drives the electro-hydraulic servo valve of screw thread cartridge formula, improved power efficiency.
Drawings
Fig. 1 is a schematic front view structure diagram of the present invention;
fig. 2 is a schematic side view of the valve body assembly of the present invention;
FIG. 3 is a schematic sectional view A-A of FIG. 2;
FIG. 4 is a schematic top view of the structure of FIG. 2;
FIG. 5 is a schematic view of section B-B of FIG. 4;
FIG. 6 is a schematic view of the perspective view of section C-C of FIG. 4;
fig. 7 is a schematic structural view of the valve core of the present invention;
fig. 8 is a schematic top view of the valve housing of the present invention;
FIG. 9 is a schematic view of the cross-sectional view D-D of FIG. 8;
the names corresponding to the sequence numbers in the figure are as follows:
the valve comprises a direct-current brushless servo motor 1, a valve body assembly 2, a valve core 3, a valve sleeve 4, an upper end cover 5, external threads 51, a lower end cover 6, a central positioning hole 61, a P port 7, a cavity A9, a cavity B10, a port A11, a port B12, a valve core end cover 13, a lower convex positioning stop 14, a cavity P15, a cavity T16, a groove A17, a groove B18, a parting bead 19, a central shaft 20, a mounting screw 21, a Glare ring 22, an inner concave annular groove 23, a first screw 24, an upper annular groove 25, a first sealing ring 26, a second screw 27, an annular boss 28, a lower annular groove 29 and a second sealing ring 30.
Detailed Description
A novel thread cartridge type rotary direct-drive electro-hydraulic servo valve is shown in figures 1-9: the valve comprises a direct current brushless servo motor 1 and a valve body component 2, wherein the valve body component 2 comprises a valve core 3, a valve sleeve 4, an upper end cover 5 and a lower end cover 6, an output shaft of the direct current brushless servo motor 1 is connected with an upward convex part of a central shaft 20 of the valve core 3, the direct current brushless servo motor 1 is fixedly arranged at the upper end of the upper end cover 5, the valve core 3 is arranged in an inner cavity of the valve sleeve 4, external threads 51 are arranged on the peripheral surface of an outer ring of the upper end cover 5, the external threads 51 are used for being connected with an integrated valve block, the bottom of the valve core 3 is arranged in a central positioning hole 61 of the lower end cover 6, a P port 7 communicated with the inner cavity from the outside is arranged on the valve sleeve 4, different P ports 7 are arranged on different circumferential positions of the same plane, two groups of inwards concave throttling cavities, specifically an A cavity 9 and a B cavity 10 are arranged on the inner wall of the, the lower end cover 6 is provided with a T port 8, the valve sleeve 4 is further provided with an A port 11 and a B port 12 which are communicated with the outside, the P port 7, the A port 11 and the B port 12 are arranged on different height planes of the valve sleeve 4, the outer annular wall of the valve core 3 is provided with a valve core switching oil path structure, and the valve core switching oil path structure meets the following conditions: when the servo valve is in a zero position, the port P7, the port T8, the port A11 and the port B12 are isolated from each other; when the valve is in a working state, the port P7 is communicated with the port A11 or the port B12 through a valve core switching oil path, the port T8 is communicated with the port B12 or the port A11 through a valve core switching oil path, and the port P7 and the port T8 are not communicated with the port A11 or the port B12 simultaneously; the outer ring of the bottom of the central shaft 20 of the valve core 3 is sleeved with a valve core end cover 13, the valve core end cover 13 is respectively provided with a lower convex positioning stop 14 corresponding to the position of the corresponding upper opening of the valve core switching oil path, the corresponding lower convex positioning stop 14 is respectively embedded in the upper opening of the valve core switching oil path and sealed by glue, and the outer ring wall of the valve core 3 is in clearance fit with the inner wall of the valve sleeve 4.
Two groups of symmetrically arranged oil circuit structures are arranged on the circumference of the outer ring wall of the valve core 3 in the upward direction, each group of oil circuit structures comprises a P cavity 15, a T cavity 16, an A groove 17 and a B groove 18, the corresponding positions of the outer ring wall of the valve core 3 are respectively provided with the concave P cavity 15, the concave T cavity 16, the concave A groove 17 and the concave B groove 18, the height direction of the P cavity 15 covers the horizontal plane of the P port 7 and the horizontal plane of the A cavity 9, the P cavity 15 is connected with the P port 7 and the A cavity 9, the height direction of the T cavity 16 covers the horizontal plane of the B cavity 10, the bottom of the T cavity 16 penetrates through the valve core 3 and is communicated with the inlet of the T port 8, the T cavity 16 is connected with the T port 8 and the B cavity 10, the height direction of the A groove 17 covers the horizontal plane of the A cavity 9 and the horizontal plane of the A port 11, the A groove 17 is used for connecting one group of throttling cavities and the A port 11 in, The horizontal plane of the port B12 is used for connecting another group of throttling cavities and the port B12 in the working state of the tank B18, the tank A17, the cavity P15, the tank B18 and the cavity T16 which are positioned in the plane of the cavity A9 are sequentially arranged at intervals and are respectively isolated through a parting stop 19 to form a group of oil circuit structures, the radian ranges corresponding to the parting stops 19 on two sides of the cavity P15 of the valve core 3 cover the circumferential range of the cavity A9 on the working edge of the valve sleeve 4, the radian ranges corresponding to the parting stops 19 on two sides of the cavity T16 of the valve core 3 cover the circumferential range of the cavity B10 on the working edge of the valve sleeve 4, and when the servo valve is in a zero position, the port P7, the port T8, the port A11 and the port B12 are isolated from each other; when the working state is in, the cavity A11 is communicated with the groove A17 or the groove B18, the cavity B12 is communicated with the groove B18 or the groove A17, and oil paths are communicated and switched; a valve core end cover 13 is sleeved on the outer ring of the bottom of a central shaft 20 of the valve core 3, the valve core end cover 13 is respectively provided with a lower convex positioning stop 14 corresponding to the upper opening positions of the A groove 17 and the B groove 18, the corresponding lower convex positioning stop 14 is respectively embedded in the upper openings of the A groove 17 and the B groove 18 and is sealed by glue, and the outer ring wall of the valve core 3 is in clearance fit with the inner wall of the valve sleeve 4;
the positions of the A groove 17 and the B groove 18 are interchanged, and the function of the whole structure is unchanged;
two oil grooves or oil cavities of the same type are arranged at two ends of the valve core 3 with corresponding diameters, the diameter positions of a P cavity 15 and a T cavity 16 are mutually vertical, the diameter positions of an A groove 17 and a B groove 18 are mutually vertical, the central radian interval of the adjacent P cavity 15 and A groove 17 is 45 degrees, the number of the A cavity 9 and the B cavity 10 on the valve sleeve 4 is two respectively, the two A cavities 9 and the two B cavities 10 are arranged at two ends of the inner cavity of the valve sleeve 4 with corresponding diameters, and the diameter positions of the A cavity 9 and the B cavity 10 are mutually vertical;
the P cavity 15 and the T cavity 16 are grooves arranged in parallel with the central axis of the valve core 3 from bottom to top;
the radian ranges of the P cavity 15 and the T cavity 16 are the same, so that the whole structure is convenient to manufacture; the radian ranges of the cavity A9 and the cavity B10 are the same, so that the whole structure is convenient to manufacture;
the radian range of the cavity A6 is larger than that of the cavity P15 in the plane of the cavity A9;
the height plane of the port A11 is positioned above the height plane of the port P7, and the height plane of the port B12 is positioned below the height plane of the port P7;
the valve core end cover 13 is sleeved at the bottom position of the central shaft 20, the lower end face of the valve core end cover 13 is closely attached to the upper end face of the main body part of the valve core 3, the outer ring face of the valve core end cover 13 is in clearance fit with the inner wall of the valve sleeve 4, and the valve core end cover 13 is fixedly connected with the main body part of the valve core 3 through mounting screws 21 which are circumferentially distributed;
a position, where the upper convex part of the central shaft 20 of the valve core 3 penetrates through the upper end cover 5, is sleeved with a Glare ring 22, a concave annular groove 23 is arranged at a corresponding position of the upper end cover 5, and the Glare ring 22 is arranged in the concave annular groove 23;
the upper end cover 5 is fixedly connected with the upper end ring surface of the valve sleeve 4 through a first screw 24, the upper end ring surface of the valve sleeve 4 is provided with an upper ring groove 25, a first sealing ring 26 is arranged in the upper ring groove 25, and the first sealing ring 26 is tightly attached to the corresponding contact surface of the upper end cover 5, so that the sealing between the valve sleeve 4 and the upper end cover 5 is realized;
the lower end cover 6 is fixedly connected with the lower end ring surface of the valve sleeve 4 through a second screw 27, the lower end surface of the valve sleeve 4 is provided with an annular boss 28, the upper end surface of the lower end cover 6 is provided with a lower annular groove 29 corresponding to the annular boss 28, a second sealing ring 30 is arranged in the lower annular groove 29, and the annular boss 28 is embedded in the lower annular groove 29 and is pressed on the upper end surface of the second sealing ring 30, so that the sealing between the valve sleeve 4 and the lower end cover 6 is realized.
The working principle is as follows: when the servo valve is in a zero position, as shown in fig. 3, the port P, the port T, the port A and the port B are isolated from each other; at the moment, the port P is communicated with the cavity A through the cavity P, the port A is communicated with the lower part of the groove A, the port T is communicated with the cavity B through the cavity T, and the port B is communicated with the lower part of the groove B;
in a working state, the valve core a slightly rotates clockwise by an angle by taking the figure 3 as a zero position, the cavity A is communicated with the cavity A, the cavity B is communicated with the cavity B, the oil circuit is communicated and switched, and the port P is communicated with the port A and the port T is communicated with the port B; b, slightly rotating the valve core by an angle anticlockwise, wherein the cavity A is communicated with the groove B, the cavity B is communicated with the groove A, the oil way is communicated and switched, and the port P is communicated with the port B and the port T is communicated with the port A;
the throttling cavities (the cavity A and the cavity B) are arranged on the valve sleeve, and the upper port of the valve core switching oil way is sealed by combining the valve core end cover and the valve core, so that the leakage amount of the end face is greatly reduced, the leakage amount of the threaded plug-in type rotary direct-drive electro-hydraulic servo valve is reduced, and the power efficiency is improved;
the direct-current servo motor is used as an electro-hydraulic conversion part of the threaded plug-in type rotary direct-drive electro-hydraulic servo valve, so that the requirement of frequent start and stop in the working process of the servo valve is met, and the adaptability of the servo motor to external load change is enhanced; zero jitter of the servo motor caused by mechanical characteristics is reduced, and therefore stability of the electro-hydraulic servo valve in the zero position is improved; the controllability of the servo motor at a zero position accessory is enhanced by properly prolonging the time of frequently starting and stopping the servo motor; through adding the case end cover to it is fixed to add the glue with the bolt, reduced the terminal surface and revealed.
The detailed description of the embodiments of the present invention has been provided, but the present invention is only the preferred embodiments of the present invention, and should not be considered as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the present invention shall fall within the scope of the present patent application.
Claims (10)
1. The utility model provides a novel rotatory electrohydraulic servo valve that directly drives of screw thread cartridge formula, it includes DC brushless servo motor, valve body subassembly, the valve body subassembly is including case, valve barrel, upper end cover, lower end cover, DC brushless servo motor's output shaft the epirelief part of the center pin of case, DC brushless servo motor adorns admittedly in the upper end of upper end cover, the inner chamber of valve barrel is arranged with the case, the outer loop of upper end cover is global to be equipped with the external screw thread, the external screw thread is used for the erection joint with the integrated valve piece, the bottom of case install in the center locating hole of lower end cover, its characterized in that: the valve sleeve is provided with a P port communicated with the inner cavity from the outside, different P ports are arranged at different circumferential positions of the same plane, the inner wall of the valve sleeve is provided with two groups of inwards concave throttling cavities which are respectively an A cavity and a B cavity, the A cavity and the B cavity are arranged at different circumferential angle positions of the same plane of the inner wall circumference of the valve sleeve, the valve sleeve is also provided with an A port and a B port communicated with the outside, the lower end cover is provided with a T port, the P port, the A port and the B port are arranged at different height planes of the valve sleeve, the outer ring wall of the valve core is provided with a valve core switching oil circuit structure, and the valve core switching oil circuit meets the following conditions: when the servo valve is in a zero position, the port P, the port A, the port B and the port T are isolated from each other; when the valve core switching oil way is used for switching the oil way between the port P and the port B, the port T is communicated with the port B or the port A through the valve core switching oil way, and the port P and the port T are not communicated with the port A or the port B at the same time; the valve core switching oil way is characterized in that a valve core end cover is sleeved on the outer ring at the bottom of the central shaft of the valve core, lower convex positioning backstops are respectively arranged on the valve core end cover corresponding to the upper opening of the valve core switching oil way, the corresponding lower convex positioning backstops are respectively embedded in the upper opening of the valve core switching oil way and are sealed through glue, and the outer ring wall of the valve core is in clearance fit with the inner wall of the valve sleeve.
2. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 1, wherein: the periphery of the outer ring wall of the valve core is provided with two groups of symmetrically arranged oil circuit structures, each group of oil circuit structure comprises a P cavity, a T cavity, an A groove and a B groove, the corresponding positions of the outer ring wall of the valve core are respectively provided with the inward concave P cavity, T cavity, A groove and B groove, the height direction of the P cavity covers the horizontal plane of the P port and the horizontal plane of the A cavity, the P cavity is connected with the P port and the A cavity, the height direction of the T cavity covers the horizontal plane of the B cavity, the bottom of the T cavity penetrates through the valve core and is communicated with the inlet of the T port, the T cavity is connected with the T port and the B cavity, the height direction of the A groove covers the horizontal plane of the A cavity and the horizontal plane of the A port, the A groove is used for connecting one group of throttling cavities and the A port under the working state, and the height direction of the B groove covers the horizontal plane of the B cavity and the horizontal plane, the groove B is used for connecting another group of throttling cavities and a port B in a working state, the groove A, the cavity P, the groove B and the cavity T which are positioned in a plane where the cavity A is positioned are sequentially arranged at intervals and are respectively isolated through parting beads to form a group of oil circuit structures, the radian ranges corresponding to the parting beads on the two sides of the cavity P of the valve core cover the circumferential range of the corresponding cavity A on the working edge of the valve sleeve, the radian ranges corresponding to the parting beads on the two sides of the cavity T of the valve core cover the circumferential range of the corresponding cavity B on the working edge of the valve sleeve, and when the servo valve is in a zero position, the port P, the port T, the port A and the port B are isolated from each other; when the working state is in, the cavity A is communicated with the groove A or the groove B, the cavity B is communicated with the groove B or the groove A, and the oil paths are communicated and switched; the valve core is characterized in that a valve core end cover is sleeved on the outer ring at the bottom of the central shaft of the valve core, lower convex positioning backstops are respectively arranged on the valve core end cover corresponding to the upper opening positions of the groove A and the groove B, the corresponding lower convex positioning backstops are respectively embedded in the upper openings of the groove A and the groove B and are sealed through glue, and the outer ring wall of the valve core is in clearance fit with the inner wall of the valve sleeve.
3. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 2, wherein: the positions of the groove A and the groove B are interchanged.
4. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 2 or 3, wherein: two oil grooves or oil cavities of the same type are arranged at two ends of the valve core corresponding to the diameter, the diameter positions of the P cavity and the T cavity are mutually vertical, the diameter positions of the A groove and the B groove are mutually vertical, the central radian interval of the adjacent P cavity and the A groove is 45 degrees, the number of the A cavity and the B cavity on the valve sleeve is respectively two, the two A cavity and the two B cavity are arranged at two ends of the valve sleeve inner cavity corresponding to the diameter, and the diameter positions of the A cavity and the B cavity are mutually vertical.
5. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 4, wherein: the P cavity and the T cavity are groove bodies arranged in parallel to the central shaft of the valve core from bottom to top; the radian ranges of the P cavity and the T cavity are the same; the radian ranges of the cavity A and the cavity B are the same; the radian range of the cavity A is larger than that of the cavity P in the plane of the cavity A.
6. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 1, wherein: the height plane of the port A is located above the height plane of the port P, and the height plane of the port B is located below the height plane of the port P.
7. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 1, wherein: the valve core end cover is sleeved at the bottom of the central shaft, the lower end face of the valve core end cover is arranged to be tightly attached to the upper end face of the valve core main body part, the outer ring face of the valve core end cover is in clearance fit with the inner wall of the valve sleeve, and the valve core end cover is fixedly connected with the valve core main body part through mounting screws circumferentially distributed.
8. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 1, wherein: the valve core is characterized in that a position, where the upper convex part of the central shaft of the valve core penetrates through the upper end cover, is sleeved with a GREEN ring, a concave annular groove is formed in a corresponding position of the upper end cover, and the GREEN ring is arranged in the concave annular groove.
9. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 1, wherein: the upper end cover is fixedly connected with the upper end ring surface of the valve sleeve through a first screw, an upper ring groove is formed in the upper end ring surface of the valve sleeve, a first sealing ring is installed in the upper ring groove, and the first sealing ring is tightly attached to the corresponding contact surface of the upper end cover.
10. The novel threaded cartridge type rotary direct-drive electro-hydraulic servo valve as claimed in claim 1, wherein: the lower end cover is fixedly connected with the lower end annular surface of the valve sleeve through a second screw, an annular boss is arranged on the lower end surface of the valve sleeve, a lower annular groove is arranged on the upper end surface of the lower end cover corresponding to the annular boss, a second sealing ring is arranged in the lower annular groove, and the annular boss is embedded in the lower annular groove and is pressed on the upper end surface of the second sealing ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920101888.6U CN210715343U (en) | 2019-01-22 | 2019-01-22 | Novel rotatory electro-hydraulic servo valve that directly drives of screw thread cartridge formula |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920101888.6U CN210715343U (en) | 2019-01-22 | 2019-01-22 | Novel rotatory electro-hydraulic servo valve that directly drives of screw thread cartridge formula |
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| CN210715343U true CN210715343U (en) | 2020-06-09 |
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| CN201920101888.6U Active CN210715343U (en) | 2019-01-22 | 2019-01-22 | Novel rotatory electro-hydraulic servo valve that directly drives of screw thread cartridge formula |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578361A (en) * | 2019-01-22 | 2019-04-05 | 江苏钧微动力科技有限公司 | A kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578361A (en) * | 2019-01-22 | 2019-04-05 | 江苏钧微动力科技有限公司 | A kind of Novel threaded plug-in rotation is straight to drive electrohydraulic servo valve |
| CN109578361B (en) * | 2019-01-22 | 2024-04-12 | 江苏钧微动力科技有限公司 | Novel screw thread cartridge formula rotatory electric liquid servo valve that directly drives |
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