Low hydraulic power rotary valve structure with anti-clamping stagnation clutch

Abstract

The invention provides a low hydraulic power rotary valve structure with an anti-clamping stagnation clutch, which comprises a valve sleeve (1), an outer valve core (2), an inner valve core (3), a ball (4), a pressing plate (5) and a spring (6), and the inner valve core (3) is connected with a motor rotating shaft and rotates along with the motor rotating shaft; the outer valve element (2) is arranged on the outer side of the inner valve element (3) in a sleeving mode from the bottom of the inner valve element (3), and the valve sleeve (1) is arranged on the outer side of the outer valve element (2) in a sleeving mode from the bottom of the outer valve element (2). A plurality of V-shaped grooves are evenly distributed in the circumference of the end face of the top of the outer valve element (2), balls (4) are arranged in the V-shaped grooves, a motor rotating shaft is sleeved with the pressing plate (5) and the spring (6), and the spring (6) presses the balls (4) through the pressing plate (5) so that the bottom of the outer valve element (2) can make contact with the internal storage bottom of the valve sleeve (1). An oil way on the outer valve core (2) is the same as that of the valve sleeve (1) and is used for realizing oil way communication between the valve sleeve (1) and the inner valve core (3); when the inner valve element (3) and the outer valve element (2) are clamped, the outer valve element (2) can overcome the elastic force of the spring (6) by increasing the input torque of the motor rotating shaft, so that the inner valve element (3) and the outer valve element (2) are driven to rotate at the same time to ensure that the function of the rotary valve is normal, and clamping is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of a rotary direct-drive servo valve actuated by aviation hydraulic pressure, and in particular to a low-hydraulic force rotary valve structure with an anti-stuck clutch. Background Art

[0002] With the rapid development of aviation hydraulic actuation technology, rotary direct drive servo valves have been widely used. Compared with traditional electro-hydraulic servo valves, rotary direct drive servo valves significantly reduce internal leakage, thereby reducing power consumption. As the main component of the control valve output flow, the valve core is directly connected to the motor shaft and rotates coaxially, and the flow regulation is achieved through the oil groove geometry and angular travel.

[0003] However, in order to ensure the flow characteristics of the rotary direct-drive servo valve, the valve core angular stroke is usually limited to a certain range. Therefore, the geometric shape of the valve core throttling groove determines the structure of the fluid channel, thereby limiting the hydraulic force.

[0004] As aviation hydraulic components develop towards high power and high power-to-weight ratio, in order to increase the power of rotary direct-drive servo valves and reduce power consumption, the problem of fluid flow force generated by large-flow rotary valve structures needs to be solved. Summary of the invention

[0005] The invention provides a low hydraulic force rotary valve structure with an anti-stuck clutch, which solves the problem of hydraulic force generated by a large flow rotary valve structure.

[0006] The present invention provides a low hydraulic power rotary valve structure with an anti-stuck clutch, comprising: a valve sleeve 1, an outer valve core 2, an inner valve core 3, a ball 4, a pressure plate 5, and a spring 6, wherein:

[0007] The inner valve core 3 is connected to the motor shaft and rotates with the motor shaft; the outer valve core 2 is sleeved on the outer side of the inner valve core 3 from the bottom of the inner valve core 3, and the valve sleeve 1 is sleeved on the outer side of the outer valve core 2 from the bottom of the outer valve core 2;

[0008] The top end surface of the outer valve core 2 is evenly distributed with a plurality of V-shaped grooves, and a ball 4 is arranged in the V-shaped groove. The pressure plate 5 and the spring 6 are both sleeved on the motor shaft. The spring 6 presses the ball 4 through the pressure plate 5, so that the bottom of the outer valve core 2 contacts the bottom of the valve sleeve 1.

[0009] The oil circuit setting on the outer valve core 2 is the same as that of the valve sleeve 1, and is used to achieve oil circuit communication between the valve sleeve 1 and the inner valve core 3;

[0010] When the inner valve core 3 and the outer valve core 2 are stuck, increasing the input torque of the motor shaft can make the outer valve core 2 overcome the elastic force of the spring 6, thereby driving the inner valve core 3 and the outer valve core 2 to rotate simultaneously to ensure the normal function of the rotary valve and achieve anti-stuckness.

[0011] Optionally, the valve sleeve 1 and the outer valve core 2 are coaxially placed in the valve body with a clearance fit.

[0012] Optionally, the outer valve core 2 and the inner valve core 3 are coaxially placed in the valve sleeve 1 with a clearance fit.

[0013] Optionally, three oil passage holes penetrating in the radial direction are arranged on the inner valve core 3 , and the three oil passage holes are distributed on three parallel planes; the axial directions of the three oil passage holes are not parallel to each other.

[0014] Optionally, the cross-sections of the three oil holes are rectangular.

[0015] Optionally, the cross-sections of the oil inlet hole and the control hole arranged on the valve sleeve 1 are rectangular; and the cross-section of the oil return hole is circular.

[0016] Optionally, the cross-sectional size of each oil passage hole on the outer valve core 2 is smaller than the cross-sectional size of each oil passage hole on the valve sleeve 1 .

[0017] Optionally, the angle between the first connecting line and the second connecting line is greater than 21°;

[0018] The first connecting line is a connecting line between the center of the throttle hole of the inner valve core 3 and the center of the circle of the inner valve core 3;

[0019] The second connecting line is the outer edge of the control hole of the outer valve core 2;

[0020] The angle between the third connecting line and the fourth connecting line is greater than 21°;

[0021] The third connecting line is a connecting line between the edge of the throttle hole of the inner valve core 3 and the center of the inner valve core 3;

[0022] The fourth connecting line is the radial edge of the inner valve core 3 .

[0023] The present invention provides a low hydraulic force rotary valve structure with an anti-stuck clutch. The low hydraulic force design of the rotary valve structure can reduce the servo valve input torque requirement and system power consumption. The clutch ensures that flow control can still be achieved when the rotary valve is mechanically stuck, thereby ensuring the high reliability and high safety of the servo valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. It is obvious that the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a low hydraulic power rotary valve with an anti-sticking clutch of the present invention;

[0026] Figure 2for Figure 1 The cross-section at point B in the middle;

[0027] Figure 3 for Figure 1 The cross-section at A in the middle;

[0028] Figure 4 for Figure 1 Sectional view at C in the middle;

[0029] Figure 5 It is a partial enlarged view of the oil in the rotary valve assembly in one embodiment of the present invention, which flows from the oil inlet through the throttling edge to the second control chamber;

[0030] Figure 6 It is a partial enlarged view of the oil in the rotary valve assembly of one embodiment of the present invention from the first control chamber through the throttling edge to the oil return;

[0031] Figure 7 It is a cross-sectional view of the oil inlet flow passage connecting the second control chamber when the inner valve core and the outer valve core of the rotary valve assembly are stuck in one embodiment of the present invention;

[0032] Figure 8 It is a cross-sectional view of the return oil flow passage connecting the first control chamber when the inner valve core and the outer valve core of the rotary valve assembly are stuck in one embodiment of the present invention;

[0033] Among them: 1-valve sleeve, 2-external valve core, 3-inner valve core, 4-ball, 5-pressure plate, 6-spring. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] like Figure 1-8 The present invention provides a low hydraulic power rotary valve structure with an anti-stuck clutch, the structure comprising: a valve sleeve 1, an outer valve core 2, an inner valve core 3, a ball 4, a pressure plate 5, and a spring 6, wherein:

[0038] The valve sleeve 1 includes fourteen oil passage holes on three planes, including oil inlet holes, oil return holes, and control holes, which are placed in the valve body and are in a restrained state;

[0039] The outer valve core 2 includes fourteen oil holes on three planes, including an oil inlet hole, an oil return hole, and a control hole;

[0040] The valve sleeve 1 and the outer valve core 2 are coaxially placed in the valve body, and a clearance fit is adopted. The outer valve core 2 can rotate relative to the valve sleeve 1, and one side constrains it to move horizontally along the axis;

[0041] The inner valve core 3 includes three oil passage holes on three planes that penetrate radially and are cross-distributed, and the oil passages of the outer valve core and the valve sleeve are connected to each other by controlling the rotation angle of the inner valve core to form a flow channel;

[0042] The outer valve core 2 and the inner valve core 3 are coaxially placed in the valve sleeve 1, and are relatively rotatable by means of clearance fit;

[0043] The valve sleeve 1, the outer valve core 2, and the inner valve core 3 jointly construct a flow channel through the oil passage holes on the structure to realize the function of the rotary valve flow control;

[0044] The oil passage hole includes its geometric morphology. The determining factor is the cross-sectional shape of the oil passage hole. Changing the structure of the oil passage hole can adjust the hydraulic force of the rotary valve. When a specific jet angle is met, the hydraulic force can be basically eliminated, thereby reducing the power consumption required to drive the rotary valve.

[0045] The ball 4 is matched with the groove on the end face of the outer valve core 2, and the other side is in direct contact with the pressure plate 5;

[0046] One side of the spring 6 is fixed and constrained in a compressed state, and the other side transmits the elastic force to the ball 4 through the pressure plate 5, thereby pressing the outer valve core 2;

[0047] Under normal working conditions, the outer valve core 2 and the valve sleeve 1 remain stationary, and the flow control is achieved by controlling the rotation of the inner valve core 3 through input torque. When the inner valve core 3 and the outer valve core 2 are stuck, increasing the input torque can make the outer valve core 2 overcome the elastic force of the spring 6, thereby controlling the inner valve core 3 and the outer valve core 2 to rotate simultaneously to ensure the normal function of the rotary valve and achieve an anti-stuck design.

[0048] Figure 1 The present invention is a schematic cross-sectional structure diagram of a low hydraulic power rotary valve with an anti-sticking clutch.

[0049] like Figure 1 As shown, the present invention provides a low hydraulic power rotary valve structure with an anti-stuck clutch, comprising: a valve sleeve 1, an outer valve core 2, an inner valve core 3, a ball 4, a pressure plate 5, and a spring 6.

[0050] Figure 2 , Figure 3 , Figure 4 When the inner valve core 3 rotates a certain angle Figure 1 The flow passage cross-sectional view of the cross section at the position shown in B, A, and C, the corresponding state of the illustrated position is that the oil inlet is connected to the second control chamber, the oil return is connected to the first control chamber, and the rotation angle of the inner valve core 3 is controlled by the external input torque to meet the flow control function of the rotary valve structure.

[0051] Figure 2 It is a cross-sectional view of the oil inlet flow passage of the rotary valve assembly connected to the second control chamber according to one embodiment of the present invention.

[0052] The valve sleeve 1 may include a first valve sleeve oil inlet hole 1a, a second valve sleeve oil inlet hole 1b, a first valve sleeve oil return hole 1c, a second valve sleeve oil return hole 1d, a first valve sleeve control hole 1e, a second valve sleeve control hole 1f, a third valve sleeve control hole 1g, and a fourth valve sleeve control hole 1h;

[0053] The outer valve core 2 may include an outer valve core first oil inlet hole 2a, an outer valve core second oil inlet hole 2b, an outer valve core first control hole 2c, an outer valve core second control hole 2d, an outer valve core third control hole 2e, and an outer valve core fourth control hole 2f;

[0054] The inner valve core 3 may include an oil inlet throttling hole 3a. In the illustrated position, the inner valve core 3 rotates counterclockwise to form two oil inlet passages together with the valve sleeve 1 and the outer valve core 2, namely 1a-2a-3a-2c-1e and 1b-2b-3a-2f-1h. The high-pressure oil enters the second control chamber from the oil inlet through the oil passage.

[0055] Figure 3 It is a cross-sectional view of the rotary valve assembly return R connected to the first control chamber flow channel according to one embodiment of the present invention;

[0056] Among them, the valve sleeve 1 may include a first oil return hole 1c, a second oil return hole 1d, a fifth control hole 1i and a sixth control hole 1j; the outer valve core 2 may include a fifth control hole 2g and a sixth control hole 2h, a first oil return hole 2i and a second oil return hole 2j; the inner valve core 3 may include a first oil return throttling hole 3b. In the illustrated position, the inner valve core 1 rotates counterclockwise to form two oil return oil circuits with the valve sleeve 1 and the outer valve core 2, which are 1i-2g-3b-2i-1d and 1j-2h-3b-2j-1c respectively. The oil enters the return oil from the first control chamber along the oil circuit.

[0057] Figure 4 It is a cross-sectional view of the rotary valve assembly in an embodiment of the present invention, in which the oil return is not connected to the flow passage of the second control chamber;

[0058] Among them, the valve sleeve 1 may include a first oil return hole 1c, a second oil return hole 1d, a seventh control hole 1k, and an eighth control hole 1l; the outer valve core 2 may include a seventh control hole 2k, an eighth control hole 2l, a third oil return hole 2m, and a fourth oil return hole 2n; the inner valve core 3 may include a second oil return throttling hole 3c. In the illustrated position, the inner valve core 1 rotates counterclockwise and does not form an oil return oil circuit with the valve sleeve 1 and the outer valve core 2, indicating that the return oil is not connected to the second control chamber.

[0059] Figure 5 It is a partial enlarged view of the oil from the oil inlet through the throttling edge to the second control chamber in the rotary valve assembly according to one embodiment of the present invention;

[0060] The structure of the first control hole 2c of the outer valve core can be designed to satisfy α≥21° and β≥21°, thereby substantially eliminating the hydraulic force in the oil inlet circuit of the rotary valve structure.

[0061] Figure 6 It is a partial enlarged view of the oil in the rotary valve assembly of one embodiment of the present invention from the first control chamber through the throttling edge to the oil return;

[0062] Among them, the structure of the fifth control hole 2g of the outer valve core can be designed to meet α≥21° and β≥21°, thereby basically eliminating the hydraulic force in the return oil circuit of the rotary valve structure.

[0063] Figure 7 , Figure 8 They are flow channel sectional views of different sections of the rotary valve when the outer valve core 2 and the inner valve core 3 are rotated together by a certain angle in the case of a stuck condition. The positions shown in the figures correspond to the oil inlet being connected to the second control chamber, and the oil return being connected to the first control chamber. The rotation angle is controlled by an external input torque to ensure that the rotary valve structure can still achieve the flow control function in the event of a stuck condition.

[0064] Figure 7It is a cross-sectional view of the oil inlet flow passage connecting the second control chamber when the inner valve core and the outer valve core of the rotary valve assembly are stuck in one embodiment of the present invention;

[0065] Among them, the outer valve core 2 and the inner valve core 1 are stuck and keep the relative position unchanged. As the input torque increases, the outer valve core 2 and the inner valve core 1 are driven to overcome the elastic force of the spring and rotate at the same time, forming two oil inlet paths with the valve sleeve 1, namely 1a-2a-1e and 1b-2b-1h. The high-pressure oil enters the second control chamber from the oil inlet through the oil path.

[0066] Figure 8 It is a cross-sectional view of the return oil flow passage connecting the first control chamber when the inner valve core and the outer valve core of the rotary valve assembly are stuck in one embodiment of the present invention;

[0067] Among them, the outer valve core 2 and the inner valve core 1 are stuck and keep the relative position unchanged. As the input torque increases, the outer valve core 2 and the inner valve core 1 are driven to overcome the elastic force of the spring and rotate at the same time, forming two return oil paths with the valve sleeve 1, namely 1i-2i-1d and 1j-2j-1c. The oil enters the return oil from the first control chamber along the oil path.

[0068] In some embodiments, the cross-sectional shapes and sizes of the valve sleeve 1, the oil passage holes of the outer valve core 2 and the throttle hole of the inner valve core 3 can be adjusted together, and the shapes can be adjusted to be rectangular or circular, thereby obtaining different maximum control flows and hydraulic forces.

[0069] In some embodiments, the maximum control flow and hydraulic force can be adjusted by simply adjusting the size of the throttle hole of the inner valve core 3 to obtain different rotary valve flow gains.

[0070] In some embodiments, adjusting the spring size and tension can change the clutch actuation torque.

[0071] After a large number of experiments, the results show that a low hydraulic force rotary valve structure with an anti-sticking clutch can not only achieve large flow control and basically eliminate hydraulic force, but also the anti-sticking clutch can ensure the normal operation of the rotary valve when the inner valve core and the outer valve core are stuck.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A low hydraulic power rotary valve structure with an anti-stuck clutch, characterized in that: include: Valve sleeve (1), outer valve core (2), inner valve core (3), ball (4), pressure plate (5), spring (6), wherein: The inner valve core (3) is connected to the motor shaft and rotates with the motor shaft; the outer valve core (2) is sleeved on the outer side of the inner valve core (3) from the bottom of the inner valve core (3); and the valve sleeve (1) is sleeved on the outer side of the outer valve core (2) from the bottom of the outer valve core (2); The top end surface of the outer valve core (2) is evenly distributed with a plurality of V-shaped grooves, and a ball (4) is arranged in the V-shaped groove. The pressure plate (5) and the spring (6) are both sleeved on the motor shaft. The spring (6) presses the ball (4) through the pressure plate (5) so that the bottom of the outer valve core (2) contacts the bottom of the valve sleeve (1). The oil circuit arrangement on the outer valve core (2) is the same as that on the valve sleeve (1), and is used to achieve oil circuit communication between the valve sleeve (1) and the inner valve core (3); When the inner valve core (3) and the outer valve core (2) are stuck, increasing the input torque of the motor shaft can enable the outer valve core (2) to overcome the elastic force of the spring (6), thereby driving the inner valve core (3) and the outer valve core (2) to rotate simultaneously to ensure the normal function of the rotary valve and achieve anti-stuck.

2. The low hydraulic power rotary valve structure with anti-stuck clutch according to claim 1, characterized in that: The valve sleeve (1) and the outer valve core (2) are coaxially placed in the valve body with clearance fit.

3. The low hydraulic power rotary valve structure with anti-stuck clutch according to claim 1, characterized in that: The outer valve core (2) and the inner valve core (3) are coaxially placed in the valve sleeve (1) with clearance fit.

4. The low hydraulic power rotary valve structure with anti-stuck clutch according to claim 1, characterized in that: The inner valve core (3) is provided with three oil passage holes penetrating in the radial direction, and the three oil passage holes are distributed on three parallel planes; the axial directions of the three oil passage holes are not parallel to each other.

5. The low hydraulic power rotary valve structure with anti-stuck clutch according to claim 4, characterized in that: The cross-sections of the three oil passage holes are rectangular.

6. The low hydraulic power rotary valve structure with anti-stuck clutch according to claim 4, characterized in that: The cross sections of the oil inlet hole and the control hole arranged on the valve sleeve (1) are rectangular; the cross section of the oil return hole is circular.

7. The low hydraulic power rotary valve structure with anti-stuck clutch according to claim 6, characterized in that: The cross-sectional dimensions of each oil passage hole on the outer valve core (2) are smaller than the cross-sectional dimensions of each oil passage hole on the valve sleeve (1).

8. The low hydraulic power rotary valve structure with anti-sticking clutch according to claim 7, characterized in that: The angle between the first connecting line and the second connecting line is greater than 21°; The first connecting line is a line connecting the center of the throttle hole of the inner valve core (3) and the center of the circle of the inner valve core (3); The second connecting line is the outer edge of the control hole of the outer valve core (2); The angle between the third connecting line and the fourth connecting line is greater than 21°; The third connecting line is a line connecting the edge of the throttle hole of the inner valve core (3) and the center of the circle of the inner valve core (3); The fourth connecting line is the radial edge of the inner valve core (3).

Images