CN118361426A - Direct-drive rotary valve of power-off automatic reset motor - Google Patents
Direct-drive rotary valve of power-off automatic reset motor Download PDFInfo
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- CN118361426A CN118361426A CN202410670718.5A CN202410670718A CN118361426A CN 118361426 A CN118361426 A CN 118361426A CN 202410670718 A CN202410670718 A CN 202410670718A CN 118361426 A CN118361426 A CN 118361426A
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- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 230000005389 magnetism Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 90
- 239000012530 fluid Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention belongs to the field of hydraulic components, and particularly relates to a direct-drive rotary valve of an automatic power-off reset motor, which comprises a constant force reset coil spring, a valve sleeve, a valve core and a shell, wherein the right end of the valve sleeve is connected with the shell; the valve core is sleeved on the inner side of the valve sleeve, the left end of the valve core is connected with the constant force reset coil spring, the right end of the valve core is driven to rotate by a motor component arranged on the inner side of the shell, and the motor component drives the valve core to rotate relative to the valve sleeve by a specified angle to control the flow. An oil port is arranged between the shell and the valve core, so that the stress balance of the valve core after pressurization is ensured. And a constant force reset coil spring is arranged at the end part of the valve sleeve, so that the automatic reset of the valve core after power failure is realized. The inside of the valve sleeve is sealed by using an excitation sealing cover. The invention adopts the motor as a driving source, realizes high-precision control, designs the hydraulic flow passage on the valve core, simplifies an external hydraulic circuit, improves the integration level, has compact structure, is convenient to install and has strong practicability.
Description
Technical Field
The invention belongs to the field of hydraulic components, and particularly relates to a direct-drive rotary valve of an automatic power-off reset motor.
Background
Servo valves are used in a variety of industries to control the movement of hydraulic or pneumatic actuators based on input signals and in industries where precise control of actuators is required, such as the aerospace industry. The servo valve varies the flow of fluid through the valve to control the position, velocity, acceleration or force produced by an actuator (e.g., a hydraulic or pneumatic cylinder or motor).
Servo valves typically include a moving element (spool) and a fixed element (e.g., housing, sleeve, or flow passage) including a fluid inlet and outlet. The relative movement of the two elements controls the flow of fluid through the valve.
Rotary servo valves typically include a spool valve mounted for rotation relative to a stationary member defining a fluid inlet and outlet. By rotating the spool valve relative to the fluid inlet and outlet ports, the flow path between the fluid inlet and outlet ports can be provided or altered to control the flow of fluid through the valve.
Linear servo valves typically include a spool valve mounted for axial displacement relative to a fixed element defining a fluid inlet and outlet. By moving the spool valve back and forth relative to the inlet and outlet ports, the flow path between the fluid inlet and outlet ports can be provided or changed to control the flow of fluid through the valve.
The use of rotary servo valves in high power fluid systems is limited because rotary servo valves tend to be less efficient than linear servo valves due to the greater operating friction. However, they have the advantage of being more easily coupled to a rotating electrical machine.
One known rotary servo valve design has a housing that includes pairs of ports that are diametrically opposed about a central rotary reservoir. The pressure in each port is replicated and supplied to the diametrically opposed ports. As the spool rotates, different passages between ports of different pressures gradually open and close.
The invention optimizes the structure, reduces the volume of the valve, and can automatically reset after power failure, so that the structure is more compact.
Disclosure of Invention
The invention aims to provide a direct-drive rotary valve of an automatic power-off reset motor, aiming at the defects of the prior structure, wherein radial load is generated on a slide valve when pressurized fluid flows in the slide valve, unbalance is generated, energy loss is caused by friction increase, and meanwhile, when the fluid flows around the slide valve, torsion load is generated on the slide valve according to Bernoulli effect. The rotary valve controls the flow through controlling the rotation angle of the valve core in the valve sleeve, and the required hydraulic oil channels are all arranged on the valve core, so that the external oil channel is greatly simplified, and after the power is cut off, the rotary valve is automatically reset under the action of the constant force reset coil spring, so that the integrated level is high, the structure is compact, and the installation is convenient.
The aim of the invention is realized by the following technical scheme: the invention comprises a constant force reset coil spring, a valve sleeve, a valve core and a shell, wherein the right end of the valve sleeve is connected with the shell; the valve core is sleeved on the inner side of the valve sleeve, the left end of the valve core is connected with the constant force reset coil spring, the right end of the valve core is driven to rotate by a motor component arranged on the inner side of the shell, and the motor component drives the valve core to rotate relative to the valve sleeve by a specified angle to control the flow.
The outer wall of the valve sleeve is sequentially provided with a ring-shaped valve sleeve second window groove, a valve sleeve first oil port groove and a valve sleeve first window groove at intervals from left to right, a valve core hole for sleeving the valve core is axially formed in the valve sleeve, the valve sleeve second window groove, the valve sleeve first oil port groove and the valve sleeve first window groove are respectively provided with a valve sleeve first window communicated with the valve core hole, a valve sleeve first oil port and a valve sleeve second window, and the valve sleeve first window and the valve sleeve second window form an included angle;
The valve core is of a cylindrical structure, an annular valve core high-pressure oil inlet groove is formed in the middle of the outer wall of the valve core, and square valve core first oil return grooves and square valve core second oil return grooves are respectively formed in the upper and lower sides of the right side and the left side of the valve core high-pressure oil inlet groove; the front right side and the rear left side of the valve core high-pressure oil inlet groove are respectively provided with a valve core first high-pressure oil inlet groove and a valve core second high-pressure oil inlet groove, and the inner ends of the valve core first high-pressure oil inlet groove and the valve core second high-pressure oil inlet groove are communicated with the valve core high-pressure oil inlet groove; the outer ends of the first oil return groove and the second oil return groove of the valve core are respectively provided with a first oil return port and a second oil return port which are communicated with the oil return holes of the valve core; the right end of the valve core forms a motor connecting shaft, motor connecting key slots are formed in two sides of the outer wall of the motor connecting shaft, and an oil passing radial port is formed in the outer wall of the motor connecting shaft;
The shell is of an annular structure, the left end of the shell is connected with the right end of the valve sleeve, and the motor component fixed on the inner wall of the shell is connected with the motor connecting key groove.
The widths of the first high-pressure oil inlet groove of the valve core and the second high-pressure oil inlet groove of the valve core are equal; and the width of the first high-pressure oil inlet groove of the valve core is smaller than one fourth of the inner diameter of the valve sleeve.
The motor assembly comprises a frameless torque motor stator, a frameless torque motor rotor and flat keys, wherein the frameless torque motor stator is fixed on the inner wall of the shell in an annular structure, the frameless torque motor rotor is arranged on the inner side of the frameless torque motor stator, and the flat keys which are used for being clamped with the motor connecting key grooves are arranged on two sides of the inner wall of the frameless torque motor rotor.
The left end of the inner wall of the shell is connected with the right end of the outer wall of the valve core through a thrust bearing.
Annular protrusions are formed on the left side of the valve sleeve second window groove, between the valve sleeve second window groove and the valve sleeve first oil port groove and between the valve sleeve first oil port groove and the valve sleeve first window groove, annular sealing grooves are formed in the middle of the outer wall of the annular protrusions, and O-shaped sealing rings are nested in the sealing grooves.
The valve sleeve first oil port groove is provided with a plurality of valve sleeve first oil ports in an annular array along the circumferential direction of the valve sleeve first oil port groove.
The right end of the valve core is connected with an excitation sealing cover, and the excitation sealing cover adopts a grid-type structure sealing cover made of excitation and magnetism isolating materials.
The invention has the beneficial effects that:
The invention adopts a frameless torque motor as a driving source, and a hydraulic flow passage is arranged on a valve core. The integrated level of the whole flow valve can be improved, so that the structure is compact, the external hydraulic circuit is simplified, the cost is saved, and the installation is convenient. Through the reset coil spring, automatic reset after power failure can be realized.
Drawings
FIG. 1 is a cross-sectional view of a motor direct drive rotary valve structure;
FIG. 2 is a schematic diagram of a motor direct drive rotary valve;
FIG. 3 is a schematic illustration of a valve sleeve;
FIG. 4 is a schematic illustration of a valve cartridge;
FIG. 5 is a cross-sectional view of the valve cartridge;
FIG. 6 is a flow path diagram after deployment according to a spool centerline, in a first mode of operation;
FIG. 7 is a flow path diagram after deployment according to the spool centerline, in a second mode of operation;
FIG. 8 is a flow path diagram after deployment according to a spool centerline, in a third mode of operation;
FIG. 9 is a constant force return coil spring;
Fig. 10 is an excitation seal housing.
In the figure: 1. a constant force return coil spring; 2. a valve sleeve; 3. a valve core; 4. a housing; 5. a thrust bearing; 6. a frameless torque motor stator; 7. a frameless torque motor rotor; 8. a flat key; 9. an excitation sealing cover; 110. A return port; 120. a high pressure port; 130. a return port; 140. Sealing grooves; 111. a valve housing second window; 121. a valve sleeve first oil port; 131. a valve housing first window; 210. the valve core second oil return groove; 220. a valve core high-pressure oil inlet groove; 230. the valve core is provided with a first oil return groove; 240. the motor is connected with the key groove; 250. a valve core oil through hole; 260. a valve core oil return hole; 222. the first high-pressure oil inlet groove of the valve core; 221. the second high-pressure oil inlet groove of the valve core; 211. the valve core second oil return port; 231. and a valve core first oil return port.
Detailed Description
The invention is further described below with reference to the drawings and specific embodiments.
The invention discloses a direct-drive rotary valve of an automatic power-off reset motor, which is shown in fig. 1 and comprises a constant force reset coil spring 1, a valve sleeve 2, a valve core 3 and a shell 4, wherein the right end of the valve sleeve 2 is connected with the shell 4; the valve core 3 is sleeved on the inner side of the valve sleeve 2, the left end of the valve core 3 is connected with the constant force reset coil spring 1, the right end of the valve core 3 is driven to rotate by a motor component arranged on the inner side of the shell 4, and the motor component drives the valve core 3 to rotate for a designated angle relative to the valve sleeve 2 to realize flow control.
As shown in fig. 4-5, an annular valve sleeve second window groove 110, a valve sleeve first oil port groove 120 and a valve sleeve first window groove 130 are sequentially arranged on the outer wall of the valve sleeve 2 at intervals from left to right, a valve core hole for sleeving the valve core 3 is axially formed in the valve sleeve 2, a valve sleeve first window 131, a valve sleeve first oil port 121 and a valve sleeve second window 111 which are communicated with the valve core hole are respectively formed in the valve sleeve second window groove 110, the valve sleeve first oil port groove 120 and the valve sleeve first window groove 130, and an included angle of 90 degrees is formed between the valve sleeve first window 131 and the valve sleeve second window 111;
the valve core 3 is in a cylindrical structure, an annular valve core high-pressure oil inlet groove 220 is formed in the middle of the outer wall of the valve core 3, and square valve core first oil return grooves 230 and valve core second oil return grooves 210 are respectively formed in the upper and lower sides of the right side and the left side of the valve core high-pressure oil inlet groove 220; the front right side and the rear left side of the valve core high-pressure oil inlet groove 220 are respectively provided with a valve core first high-pressure oil inlet groove 222 and a valve core second high-pressure oil inlet groove 221, and the inner ends of the valve core first high-pressure oil inlet groove 222 and the valve core second high-pressure oil inlet groove 221 are communicated with the valve core high-pressure oil inlet groove 220; a spool oil return hole 260 is arranged in the axial direction of the spool 3, and the outer ends of the spool first oil return groove 230 and the spool second oil return groove 210 are respectively provided with a spool first oil return port 231 and a spool second oil return port 211 which are communicated with the spool oil return hole 260; the right end of the valve core 3 forms a motor connecting shaft, motor connecting keyways 240 are arranged on two sides of the outer wall of the motor connecting shaft, and an oil passing radial port 250 is arranged on the outer wall of the motor connecting shaft;
The casing 4 has an annular structure, the left end of the casing is connected with the right end of the valve sleeve 2, and a motor assembly fixed on the inner wall of the casing 4 is connected with the motor connecting key groove 240.
The widths of the first high-pressure oil inlet groove 222 of the valve core and the second high-pressure oil inlet groove 221 of the valve core are equal; and the width of the valve core first high pressure oil inlet groove 222 is smaller than one quarter of the inner diameter of the valve sleeve 1.
The motor assembly comprises a frameless torque motor stator 6, a frameless torque motor rotor 7 and flat keys 8, wherein the frameless torque motor stator 6 is fixed on the inner wall of the shell 4 in an annular structure, the frameless torque motor rotor 7 is arranged on the inner side of the frameless torque motor stator 6, and the flat keys 8 which are used for being clamped with the motor connecting key grooves 240 are arranged on two sides of the inner wall of the frameless torque motor rotor 7.
The left end of the inner wall of the shell 4 is connected with the right end of the outer wall of the valve core 3 through a thrust bearing 5.
As shown in fig. 2-3, annular protrusions are formed on the left side of the valve sleeve second window groove 110, between the valve sleeve second window groove 110 and the valve sleeve first oil port groove 120, and between the valve sleeve first oil port groove 120 and the valve sleeve first window groove 130, an annular sealing groove 140 is formed in the middle of the outer wall of the annular protrusion, and an O-shaped sealing ring is nested in the sealing groove 140; the valve housing first oil port groove 120 is provided with a plurality of valve housing first oil ports 121 in an annular array along the circumferential direction thereof.
As shown in fig. 10, the right end of the valve core 3 is connected with an excitation sealing cover 9, and the excitation sealing cover 9 adopts a grid-type sealing cover made of excitation and magnetism isolating materials.
The working process of the invention is as follows:
the invention has three working modes, and the working principle is shown in the figure:
As shown in fig. 2 to 6, a first operation mode of the present invention is shown. High pressure oil enters the valve core high pressure oil inlet groove 220 from the high pressure port 120 through the valve sleeve first oil port 121, then the high pressure oil enters the return port 130 through the valve sleeve first window 131, finally enters the working chamber A, the fluid in the working chamber B flows to the valve core second oil return groove 210 through the valve sleeve second window groove 111 on the return port 110, then flows to the oil return hole 260 through the valve core second oil return window 211, flows into the oil tank, and flows into the shell 4 through the valve core oil through hole 250.
As shown in fig. 2-5 and 7, the second operation mode of the present invention is shown. High-pressure oil enters the valve core high-pressure oil inlet groove 220 from the valve sleeve first oil port 120 through the valve sleeve first oil port 121, then the high-pressure oil passes through the valve core first high-pressure oil inlet groove 222 and the valve core second high-pressure oil inlet groove 221, at the moment, the valve sleeve window has no overlapping part with the groove on the valve core, and the fluid in the working cavity are kept static. As shown in fig. 7, different neutral functions, such as O-, Y-, H-neutral, can be achieved by adjusting the position of the valve sleeve window by a memory alloy or other means.
As shown in fig. 2 to 5 and 8, the third working mode of the present invention is shown. High pressure oil enters the valve core high pressure oil inlet groove 220 from the high pressure port 120 through the valve sleeve first oil port 121, then the high pressure oil enters the return port 110 through the valve sleeve second window 111, finally enters the working chamber A, the fluid of the working chamber B flows to the valve core first oil return groove 230 through the valve sleeve first window groove 131 on the return port 130, then reaches the oil return hole 260 through the valve core second oil return window 231, flows into the oil tank and flows into the shell through the valve core oil through hole 250.
The invention completes the working mode of one period, realizes the one-time reciprocating motion of the actuating mechanism, adjusts the flow of the valve by controlling the rotation angle of the motor, and has high integration level, compact structure, convenient installation and strong practicability.
Claims (8)
1. A direct-drive rotary valve of an automatic power-off reset motor is characterized in that: the valve comprises a constant force reset coil spring (1), a valve sleeve (2), a valve core (3) and a shell (4), wherein the right end of the valve sleeve (2) is connected with the shell (4); the valve core (3) is sleeved on the inner side of the valve sleeve (2), the left end of the valve core (3) is connected with the constant force reset coil spring (1), the right end of the valve core (3) is driven to rotate by a motor component arranged on the inner side of the shell (4), and the motor component drives the valve core (3) to rotate for a designated angle relative to the valve sleeve (2) to control flow.
2. The direct-drive rotary valve of an automatic power-off reset motor of claim 1, wherein: the outer wall of the valve sleeve (2) is sequentially provided with a ring-shaped valve sleeve second window groove (110), a valve sleeve first oil port groove (120) and a valve sleeve first window groove (130) at intervals from left to right, a valve sleeve hole for sleeving the valve sleeve (3) is axially formed in the valve sleeve (2), the valve sleeve second window groove (110), the valve sleeve first oil port groove (120) and the valve sleeve first window groove (130) are respectively provided with a valve sleeve first window (131), a valve sleeve first oil port (121) and a valve sleeve second window (111) which are communicated with the valve sleeve hole, and the valve sleeve first window (131) and the valve sleeve second window (111) form an included angle of 90 degrees;
The valve core (3) is of a cylindrical structure, an annular valve core high-pressure oil inlet groove (220) is formed in the middle of the outer wall of the valve core, and square valve core first oil return grooves (230) and square valve core second oil return grooves (210) are respectively formed in the upper and lower sides of the right side and the left side of the valve core high-pressure oil inlet groove (220); the front right side and the rear left side of the valve core high-pressure oil inlet groove (220) are respectively provided with a valve core first high-pressure oil inlet groove (222) and a valve core second high-pressure oil inlet groove (221), and the inner ends of the valve core first high-pressure oil inlet groove (222) and the valve core second high-pressure oil inlet groove (221) are communicated with the valve core high-pressure oil inlet groove (220); a valve element oil return hole (260) is axially formed in the valve element (3), and a valve element first oil return port (231) and a valve element second oil return port (211) which are communicated with the valve element oil return hole (260) are respectively formed in the outer ends of the valve element first oil return groove (230) and the valve element second oil return groove (210); the right end of the valve core (3) is provided with a motor connecting shaft, motor connecting key grooves (240) are formed in two sides of the outer wall of the motor connecting shaft, an oil passing radial port (250) is formed in the outer wall of the motor connecting shaft, and the oil passing radial port (250) is communicated with the valve core oil return hole (260);
The shell (4) is of an annular structure, the left end of the shell is connected with the right end of the valve sleeve (2), and a motor assembly fixed on the inner wall of the shell (4) is connected with the motor connecting key groove (240).
3. The direct-drive rotary valve of the automatic power-off reset motor according to claim 2, wherein: the widths of the first high-pressure oil inlet groove (222) of the valve core and the second high-pressure oil inlet groove (221) of the valve core are equal; and the width of the valve core first high-pressure oil inlet groove (222) is smaller than one quarter of the inner diameter of the valve sleeve (1).
4. The direct-drive rotary valve of the automatic power-off reset motor according to claim 2, wherein: the motor assembly comprises a frameless torque motor stator (6), a frameless torque motor rotor (7) and flat keys (8), wherein the frameless torque motor stator (6) is fixed on the inner wall of the shell (4) in an annular structure, the frameless torque motor rotor (7) is arranged on the inner side of the frameless torque motor stator (6), and the flat keys (8) used for being connected with the motor through key grooves (240) in a clamping mode are arranged on two sides of the inner wall of the frameless torque motor rotor (7).
5. A power-off automatic reset motor direct-drive rotary valve according to claim 3, wherein: the left end of the inner wall of the shell (4) is connected with the right end of the outer wall of the valve core (3) through a thrust bearing (5).
6. The direct-drive rotary valve of an automatic power-off reset motor of claim 1, wherein: annular protrusions are formed on the left side of the valve sleeve second window groove (110), between the valve sleeve second window groove (110) and the valve sleeve first oil port groove (120) and between the valve sleeve first oil port groove (120) and the valve sleeve first window groove (130), an annular sealing groove (140) is formed in the middle of the outer wall of the annular protrusion, and an O-shaped sealing ring is nested in the sealing groove (140).
7. The direct-drive rotary valve of an automatic power-off reset motor of claim 1, wherein: the valve sleeve first oil port groove (120) is provided with a plurality of valve sleeve first oil ports (121) in an annular array along the circumferential direction.
8. The direct-drive rotary valve of an automatic power-off reset motor of claim 1, wherein: the right end of the valve core (3) is connected with an excitation sealing cover (9), and the excitation sealing cover (9) is a grid-type sealing cover made of excitation and magnetism isolating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410670718.5A CN118361426A (en) | 2024-05-28 | 2024-05-28 | Direct-drive rotary valve of power-off automatic reset motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410670718.5A CN118361426A (en) | 2024-05-28 | 2024-05-28 | Direct-drive rotary valve of power-off automatic reset motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118361426A true CN118361426A (en) | 2024-07-19 |
Family
ID=91876721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410670718.5A Pending CN118361426A (en) | 2024-05-28 | 2024-05-28 | Direct-drive rotary valve of power-off automatic reset motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118361426A (en) |
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2024
- 2024-05-28 CN CN202410670718.5A patent/CN118361426A/en active Pending
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