CN115681593A - Directly drive valve body based on vibration material disk - Google Patents
Directly drive valve body based on vibration material disk Download PDFInfo
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- CN115681593A CN115681593A CN202211410876.4A CN202211410876A CN115681593A CN 115681593 A CN115681593 A CN 115681593A CN 202211410876 A CN202211410876 A CN 202211410876A CN 115681593 A CN115681593 A CN 115681593A
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Abstract
The application provides a directly driven valve body based on additive manufacturing, the valve body includes: a bottom portion having an oil passage interface; the main body part is arranged on the bottom surface part and is provided with a flow passage cavity which is communicated with the oil way interface; a motor interface portion disposed on the bottom portion, the motor interface portion in communication with the body portion; wherein the bottom portion, the main body portion and the motor interface portion are of an integrated structure; the additive manufacturing directly-driven valve body has the characteristics of high integration level, small size and light weight, and lays a foundation for research and development of more intelligent, small and efficient directly-driven valves.
Description
Technical Field
The application belongs to the technical field of electro-hydraulic servo valves, and particularly relates to a valve body of a directly driven valve based on additive manufacturing.
Background
The servo valve usually adopts a slide valve port with a non-full-circumference opening, is composed of various throttle grooves and combinations thereof, has easily controlled area gradient and wide flow regulation range, can ensure that a hydraulic actuator obtains good motion performance, and is widely applied to servo control systems of position, speed, force and the like as an important control element.
The valve body is one of the core components of the servo valve system. The valve body is an important structural component of the servo valve, provides an installation interface for components such as an internal valve sleeve and a valve core, and simultaneously undertakes the tasks of connecting a hydraulic pipeline, a motor, a sensor and the like of an external component. Meanwhile, the valve body realizes the distribution of liquid flow by depending on an internal flow passage of the valve body, and realizes the functions of controlling flow and pressure by matching with other components.
Servo valves have been developed in recent years in a direction of miniaturization and weight reduction. And the size of valve body has directly decided the volume size of servo valve product to its weight often occupies more than half of product total weight, carries out optimal design to the valve body, realizes miniaturized, light-dutyization, the valve body design that integrates indispensable.
At present, due to a plurality of limitations of the traditional machining process, in order to realize the functions of a flow passage and an oil passage in the valve body and ensure the structural strength, the valve body often has larger volume and weight, and the space and weight utilization rate is not high. Meanwhile, the angle of the connecting part of the internal flow passage of the oil way hole machined by the traditional machine is large, which is not beneficial to the flow of liquid flow, easily causes pressure loss and reduces the overall efficiency of the product.
Disclosure of Invention
To solve the technical problem, the present application provides a directly driven valve body based on additive manufacturing, the valve body including:
a bottom portion having an oil passage interface;
the main body part is arranged on the bottom surface part and is provided with a flow passage cavity which is communicated with the oil way interface;
a motor interface portion disposed on the bottom portion, the motor interface portion in communication with the body portion; wherein the bottom portion, the body portion and the motor interface portion are of an integral construction.
Preferably, the body portion comprises:
the valve body inner hole penetrates through the main body part and the motor interface part, and is used for installing a valve core;
and the runner part is communicated with the inner hole of the valve body.
Preferably, the bottom surface portion includes: bottom surface oil inlet, bottom surface oil return opening and bottom surface control mouth.
Preferably, the runner section includes:
one end of the oil inlet cavity flow passage is an oil inlet cavity throttling square hole, and the other end of the oil inlet cavity flow passage is a bottom oil inlet;
one end of the oil return cavity flow passage is an oil return cavity throttling square hole, and the other end of the oil return cavity flow passage is a bottom surface oil return port;
and one end of the control cavity flow passage is a control cavity throttling square hole, and the other end of the control cavity flow passage is a bottom surface control port.
Preferably, the oil inlet chamber flow passage, the oil return chamber flow passage and the control chamber flow passage are based on an additive manufacturing arrangement.
Preferably, the valve body further comprises:
the left end cover mounting interface is arranged at one end of the inner hole of the valve body;
and the right end cover is provided with an interface which is arranged at the other end of the inner hole of the valve body.
Preferably, the motor interface part includes:
the rotating shaft hole is used for installing a motor rotating shaft;
the magnetic steel mounting seat is used for mounting the centering magnetic steel;
the bearing seat is used for mounting a bearing, and the bearing is used for fixing a motor rotating shaft; wherein, the motor rotating shaft is connected with the valve core.
Preferably, the oil inlet cavity flow passage is provided with a main oil passage and a branch oil passage communicated with the main oil passage; the main oil way is a gradual change type flow passage, and the branch oil ways are uniformly arranged in the circumferential direction of the inner hole of the valve body and are communicated with the inner hole of the valve body through the oil inlet cavity throttling square hole;
the control cavity flow passage is provided with a main oil passage and a branch oil passage communicated with the main oil passage; the main oil way is a gradual change type flow passage, and the branch oil ways are uniformly arranged in the circumferential direction of the inner hole of the valve body and are communicated with the inner hole of the valve body through the control cavity throttling square hole;
the oil return cavity flow passage is provided with a main oil passage and a branch oil passage communicated with the main oil passage; the main oil way is a gradual change type flow passage, and the branch oil ways are uniformly arranged in the circumferential direction of the inner hole of the valve body and are communicated with the inner hole of the valve body through the throttling square hole of the oil return cavity.
The beneficial technical effect of this application:
the valve body of the additive manufacturing direct drive valve has the advantages of being high in integration level, small in size and light in weight, and lays a foundation for research and development of a more intelligent, small and efficient direct drive valve.
Drawings
Fig. 1 is a schematic structural diagram of a valve body of a directly driven valve based on additive manufacturing according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a bottom portion provided in an embodiment of the present application;
fig. 3 is a cross-sectional view of a valve body of a directly driven valve based on additive manufacturing according to an embodiment of the present application;
FIG. 4 (a) is a schematic structural diagram of an oil inlet chamber flow passage provided in an embodiment of the present application;
FIG. 4 (b) is a schematic structural diagram of a flow channel of a control chamber provided in an embodiment of the present application;
FIG. 4 (c) is a front view of a flow passage of an oil return chamber provided in an embodiment of the present application;
FIG. 4 (d) is a side view of a return chamber flow path provided by an embodiment of the present application;
fig. 5 is a flowchart of a manufacturing method of a valve body of a direct drive valve based on additive manufacturing according to an embodiment of the present application;
wherein: the structure comprises a flow channel part 1, a motor interface part 2, a bottom surface part 3, a valve body mounting screw hole 4, a shell mounting screw hole 5, a bottom surface oil inlet 6, a first bottom surface control port 7, a second bottom surface control port 8, a bottom surface oil return port 9, a left end cover mounting interface 10, a valve body inner hole 11, an oil return cavity throttling square hole 12, a control cavity throttling square hole 13, an oil inlet cavity throttling square hole 14, a rotating shaft hole 15, a magnetic steel mounting seat 16, a right end cover mounting interface 17, a bearing seat 18, an oil inlet cavity flow channel 19, a control cavity flow channel 20, an oil return cavity flow channel 21, a main oil channel 22 and a branch oil channel 23.
Detailed Description
The novel directly-driven valve body capable of meeting the professional development requirements is designed and manufactured through the application of an additive manufacturing technology, a complex flow channel design technology and an integrated design technology.
Referring to fig. 1-5, the present application provides an additive manufacturing integrated directly actuated valve body based on a complex flow channel design and a highly integrated design.
In the present embodiment, the valve body may be roughly divided into a flow path portion 1, a motor interface portion 2, and a bottom surface portion 3. By adopting a complex flow channel design technology, a cavity which accords with the flow characteristics of the fluid is designed, the flow resistance is reduced, and the flow channel efficiency is improved; by the integrated design technology, the compact design is realized, the number of product parts is reduced, and the space utilization rate is improved; meanwhile, under the condition of ensuring the integral strength, redundant structures are reduced to the maximum extent, and the weight of the valve body is further reduced.
The valve body structure of the additive manufacturing direct drive valve can be roughly divided into a flow passage part 1, a motor interface part 2 and a bottom surface part 3. The flow channel part 1 structurally comprises an oil inlet cavity flow channel 17, an oil return cavity flow channel 18, a control cavity flow channel 19, a left end cover mounting interface 10, a valve body inner hole 11, an oil return cavity throttling square hole 12, a control cavity throttling square hole 13 and an oil inlet cavity throttling square hole 14; the motor interface part 2 structurally comprises a rotating shaft hole 15, a magnetic steel mounting seat 16, a right end cover mounting interface 17 and a bearing mounting seat 18; the bottom surface part 3 structurally comprises a valve body mounting screw hole 4, a shell mounting screw hole 5, a bottom surface oil inlet 6, a first bottom surface control port 7, a second bottom surface control port 8 and a bottom surface oil return port 9.
It should be noted that the working principle of the valve body is as follows: the valve body is connected with the hydraulic test board or the controlled object board through the bottom surface mounting screw hole 4, and the end surface sealing is realized at the joint through an O-shaped rubber ring. The bottom surface oil inlet 6 is connected with a pressure oil source, the bottom surface oil return port 7 is connected with an oil tank, and the first bottom surface control port 7 and the second bottom surface control port 8 are connected with a test board or a corresponding oil way of a controlled object. The valve core is arranged in the inner hole 11 of the valve body and is in clearance fit with the inner hole, and the relative position of the throttling edge of the valve core and the throttling square hole of the valve body is controlled through the axial movement of the valve core to realize the opening and closing of the overflowing window, so that the flow control is realized.
In a feasible implementation manner, the specific process is as follows: high-pressure hydraulic oil provided by an oil source reaches the throttling square hole 14 of the oil inlet cavity through the flow passage 19 of the oil inlet cavity, if the valve core is positioned at the middle position at the moment, the throttling square hole 14 of the oil inlet cavity is completely closed, and no flow is output from the valve; when the valve core moves to one side, the oil inlet cavity throttling square hole 14 is opened, oil flows into the control cavity throttling square hole 13 on the corresponding side through the valve core oil way groove, and then flows into the test board or the controlled object through the control cavity flow passage 20, and energy transfer is completed. Meanwhile, the low-pressure oil after doing work flows into the valve body along the control cavity on the other side, enters the oil return cavity throttling square hole 12 through the control cavity flow passage 20, the control cavity throttling square hole 13 and the valve core oil way groove on the other side, and flows into the oil tank through the oil return cavity flow passage 21 and the bottom oil return port 7.
The valve body of the additive manufacturing direct drive valve has the advantages of being high in integration level, small in size and light in weight, and lays a foundation for research and development of a more intelligent, small and efficient direct drive valve. Meanwhile, application and exploration of multiple new technologies in the field of servo valves are realized, and professional capacity construction of the servo valves is promoted.
In other embodiments of the present application, the present application discloses a valve body design:
1. and determining the size of the peripheral interface of the functional oil duct, and establishing a matrix model through ug to determine the external size constraint range of the valve body.
2. According to a conventional servo valve design method, oil way space preliminary arrangement is formed. According to the functions of each main oil passage (an oil inlet cavity flow passage 19, a control cavity flow passage 20 and an oil return cavity flow passage 21), the pipe diameter and the safe wall thickness of the oil passage are determined. The process mainly determines the area S of a throttling window according to the requirement of a conventional servo valve and a slide valve flow formula, wherein the flow area is larger than 4 times S, so that the diameter of a pipeline is determined, the wall thickness of a valve body is generally not smaller than 2mm according to experience, and the valve body is primarily arranged, as shown in figure 4, oil passages of an oil inlet cavity flow passage 19 and a control cavity flow passage 20 are arranged in a ring form as short as possible, and a branch oil passage and a main oil passage form are formed. Two sides of the oil path of the oil return cavity flow passage 21 are arranged in a ring shape to form a branch oil path and a main oil path, and the other branch oil paths are communicated with the main oil paths on two sides to form a surrounding structure.
3. According to the flow passage characteristics and the window area, the minimum arrangement of the oil passage space is realized by using a design method based on additive manufacturing. The branch oil paths of the oil inlet cavity flow passage 19 are uniformly distributed around the valve body and are divided into eight circumferential oil paths. The branch circumferential oil path starts from a rectangular square hole on the inner hole 11 of the valve body, the corresponding section of the branch circumferential oil path is gradually transited from a rectangle to a circle, and the area of the rectangular section is B. The rectangular cross-sectional area and the eight times B of the eight branch circumferential oil paths are more than or equal to the area A of the throttling window. The main oil path starts from the farthest branch circumferential oil path, gradually expands to the maximum pipe diameter from the outer joint to form a gradual change type flow passage, the initial area of the gradual change type flow passage is more than four times B, and the gradual change type flow passage gradually increases to the final four times A area according to the convergence of the branch circumferential oil path. The branch circumferential oil path and the main oil path form smooth transition (the central angles of the branch circumferential oil path and the main oil path should form obtuse angle transition).
Similarly, variations in the oil path of control chamber flow passage 20 may be determined. It should be noted that, in order to ensure the optimization of the spatial layout in the valve body, the control cavity flow passage 20 is divided into two main oil passages and eight branch circumferential oil passages, wherein the three branch circumferential oil passages and the five branch circumferential oil passages are respectively merged into the two main oil passages to form a gradual change type oil passage, and the merging principle is the same as the oil supply high-pressure cavity oil passage.
Similarly, the variation of the oil paths on both sides of the oil return cavity flow passage 21 can be determined. The return oil chamber flow passage 21 is distributed on both sides of the valve body. The middle main oil way is also a gradual change type flow passage, and is firstly divided into a secondary branch oil passage and then 8 circumferential oil passages which are uniformly distributed, and the change rule of the area of the oil passages, the characteristic of the area of the window, the characteristic of the transition section and the like refer to the flow passage characteristic of the oil inlet cavity. Meanwhile, because the oil return flow passages are distributed on two sides, the oil return flow passages and the valve body form three communication oil passages through the interior of the valve body, and the positions and the areas of the communication oil passages are shown in the figure and are related to the flow characteristics to form an enclosed flow passage.
4. And drawing the internal communication flow channel by using three-dimensional drawing software. By utilizing plane projection, a flow channel central line layout is established by adopting a plurality of sections of guide lines (normal vertical transition), and the curved surface flow channel layout in any direction is realized. And then realizing the space flow channel in the step 3 by methods of sweeping, corresponding sweeping of the section starting, spline curve, pipeline and the like to form an internal communication flow channel.
5. And carrying out micro-motion adjustment on the internal oil passage through fluid simulation. And determining the flow characteristics of the oil passages, and finely adjusting each oil passage on the principle that a negative pressure point and the minimum flow resistance are not formed in the flow passage.
6. Further adjustments to the flow channels are made to account for additive manufacturing process requirements. And optimization is performed by considering the additive manufacturing process (for example, the included angle of the axes of the transition sections is more than 45 degrees, and the formation of an internal supporting structure is avoided), the requirements of the additive manufacturing process are met, and each branch independent oil way is formed.
7. And (4) integral flow channel layout and surface enveloping treatment. According to the built internal flow passage, the wall thickness factor is considered, and the spatial integral layout of the oil passage is realized. Meanwhile, the shell attached to the inner flow channel is formed according to the wall thickness by using the advantage of random processing and arrangement of the additive manufacturing space, so that the layout of space minimization is realized.
8. The valve body is used as a main base body, and all connecting or mounting parts are integrated on the valve body to form an integrated structure, so that the number of parts is reduced, the volume and weight of the valve body are reduced, and the reliability of the whole valve is improved. Other functional structures, apart from those detailed above, include: the end cover mounting interfaces are used for providing mounting and positioning for the left and right side sealing end covers; a motor mounting interface 2 as a base of the driving motor; a bearing seat 18 and a rotating shaft hole 15 for providing installation and positioning for the motor rotor; and the magnetic steel mounting seat 16 is used for mounting magnetic steel for realizing the electromagnetic centering function of the motor.
Claims (8)
1. A direct drive valve body based on additive manufacturing, the valve body comprising:
a bottom portion having an oil passage interface;
the main body part is arranged on the bottom surface part and is provided with a flow passage cavity which is communicated with the oil way interface;
a motor interface portion disposed on the bottom portion, the motor interface portion in communication with the body portion; wherein the bottom portion, the main body portion and the motor interface portion are of an integral structure.
2. The valve body of claim 1, wherein the body portion comprises:
the valve body inner hole penetrates through the main body part and the motor interface part, and is used for mounting a valve core;
and the flow passage part is communicated with the inner hole of the valve body.
3. The valve body of claim 2, wherein the bottom surface portion comprises: bottom surface oil inlet, bottom surface oil return opening and bottom surface control mouth.
4. The valve body of claim 3, wherein the runner section comprises:
one end of the oil inlet cavity flow passage is an oil inlet cavity throttling square hole, and the other end of the oil inlet cavity flow passage is a bottom surface oil inlet;
one end of the oil return cavity flow passage is an oil return cavity throttling square hole, and the other end of the oil return cavity flow passage is a bottom surface oil return port;
and one end of the control cavity flow passage is a control cavity throttling square hole, and the other end of the control cavity flow passage is a bottom surface control port.
5. The valve body of claim 4, wherein the oil inlet chamber flow passage, the oil return chamber flow passage, and the control chamber flow passage are based on an additive manufacturing arrangement.
6. The valve body of claim 2, further comprising:
the left end cover mounting interface is arranged at one end of the inner hole of the valve body;
and the right end cover mounting interface is arranged at the other end of the inner hole of the valve body.
7. The valve body of claim 6, wherein the motor interface portion comprises:
the rotating shaft hole is used for installing a motor rotating shaft;
the magnetic steel mounting seat is used for mounting the centering magnetic steel;
the bearing seat is used for mounting a bearing, and the bearing is used for fixing a motor rotating shaft; wherein, the motor rotating shaft is connected with the valve core.
8. The valve body of claim 1,
the oil inlet cavity flow passage is provided with a main oil passage and a branch oil passage communicated with the main oil passage; the main oil way is a gradual change type flow passage, and the branch oil ways are uniformly arranged in the circumferential direction of the inner hole of the valve body and are communicated with the inner hole of the valve body through the oil inlet cavity throttling square hole;
the control cavity flow passage is provided with a main oil passage and a branch oil passage communicated with the main oil passage; the main oil way is a gradual change type flow passage, and the branch oil ways are uniformly arranged in the circumferential direction of the inner hole of the valve body and are communicated with the inner hole of the valve body through the control cavity throttling square hole;
the oil return cavity flow passage is provided with a main oil passage and a branch oil passage communicated with the main oil passage; the main oil way is a gradual change type flow passage, and the branch oil ways are uniformly distributed in the circumferential direction of the inner hole of the valve body and are communicated with the inner hole of the valve body through the throttling square hole of the oil return cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211410876.4A CN115681593A (en) | 2022-11-11 | 2022-11-11 | Directly drive valve body based on vibration material disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211410876.4A CN115681593A (en) | 2022-11-11 | 2022-11-11 | Directly drive valve body based on vibration material disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115681593A true CN115681593A (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211410876.4A Pending CN115681593A (en) | 2022-11-11 | 2022-11-11 | Directly drive valve body based on vibration material disk |
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| Country | Link |
|---|---|
| CN (1) | CN115681593A (en) |
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2022
- 2022-11-11 CN CN202211410876.4A patent/CN115681593A/en active Pending
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