A fluid rotating mechanism, a fluid pump and an actuator

Abstract

The present invention discloses a fluid rotating mechanism, a fluid pump and an actuator, and relates to the field of fluid transmission technology. The fluid rotating mechanism comprises a base, a rotating component and a limiting component. The base has a containing cavity inside, and the outer wall of the base has an oil inlet and an oil outlet connected to the containing cavity. The rotating component is rotatably arranged in the containing cavity, and there is a gap between the rotating component and the inner wall of the containing cavity. The rotating component has a first contact point and a second contact point in sealing contact with the inner wall of the first cavity. The fluid rotating mechanism is constructed so that the limiting component always maintains a sealing contact with the rotating component and prevents the fluid from passing through the sealed movable channel. By using the fluid rotating mechanism, fluid can be transported or mechanical energy can be output.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid transmission, and in particular to a fluid rotating mechanism, a fluid pump and an actuator. Background Art

[0002] The actuator rotary motor uses the pressure difference of the rotating circumference of liquid, gas and other fluids to generate torque on the axis of the mechanism and drive the external working mechanism to do mechanical work. At present, the main forms of fluid rotary motors are: 1. Vane sliding type, 2. Double gear oil pressure and oil discharge type, 3. Cycloid gear type, 4. Plunger type, 5. Screw type, etc. Disadvantages of the product: The vane type has poor force, low pressure, and relatively small displacement. The double gear type is large in size, has large leakage, and low volumetric efficiency. The cycloid type is connected by an eccentric swing shaft, has a complex structure, and has low pressure. The radial plunger type is large in size, and the axial plunger type rotates by pressing the eccentric disk with oil. The rotational force is divided a lot by the axial force, resulting in large pressure loss. The screw type is sealed by a sealing rubber sleeve and lacks durability. None of the above forms can be made into a hollow structure.

[0003] Fluid pump is a machine that conveys fluid or pressurizes fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid. The main functions of the pump are: 1. It is used to convey liquids such as water, oil, acid and alkali liquids, emulsions, suspensions and liquid metals, and can also convey liquid-gas mixtures and liquids containing suspended solids. 2. The mechanical energy of the prime mover compresses the fluid to generate high-pressure fluid to drive the fluid actuator to do work. The shortcomings of the current product: basically the same as the rotary motor. Summary of the invention

[0004] A first object of the present invention is to provide a fluid rotary mechanism, which is applied to fluid transmission and can transport fluid or output mechanical energy by using the fluid rotary mechanism.

[0005] A second object of the present invention is to provide a fluid pump having the above-mentioned fluid rotating mechanism, which can transport fluid or pressurize fluid by the cooperation between a driving motor and the fluid rotating mechanism.

[0006] A third object of the present invention is to provide an actuator having the above-mentioned fluid rotating mechanism, which can convert the pressure energy of the fluid into mechanical energy.

[0007] The embodiment of the present invention is achieved as follows:

[0008] A fluid rotating mechanism, comprising:

[0009] A base body, wherein the base body has a receiving cavity inside, and an outer wall of the base body has an oil inlet and an oil outlet connected to the receiving cavity, wherein a center line of the oil inlet intersects with a center line of the oil outlet and divides the receiving cavity into a first cavity and a second cavity;

[0010] A rotating component, the rotating component is rotatably disposed in the accommodating cavity, a gap is formed between the rotating component and the inner wall of the accommodating cavity, the rotating component has a first contact point and a second contact point in sealing contact with the inner wall of the first cavity, and the rotating component has a power transmission part penetrating the end surface of the base body;

[0011] The rotating component and the inner wall of the first cavity jointly define a fluid passage, and the rotating component and the inner wall of the second cavity jointly define a sealing movable passage;

[0012] A limiting component, which is located in the sealed movable channel and is arranged on the inner wall of the second cavity, and has a sealing point in sealing contact with the rotating component;

[0013] The fluid rotating mechanism is constructed so that the limiting component always maintains sealing contact with the rotating component and prevents the fluid from passing through the sealed movable channel.

[0014] The inventor has designed the above-mentioned fluid rotating mechanism, which is applied to fluid transmission. By using the fluid rotating mechanism, fluid can be transported or mechanical energy can be output. Specifically, the fluid rotating mechanism includes a base, a rotating component and a limiting component. The base has a containing cavity inside, and the rotating component is rotatably arranged in the containing cavity. When the rotating component rotates, the sealing contact between the first contact point and the second contact point of the rotating component and the inner wall of the containing cavity also moves. Further, the center line of the oil inlet intersects with the center line of the oil outlet and divides the containing cavity into a first cavity and a second cavity. The outer periphery of the rotating component and the inner wall of the first cavity jointly define a fluid channel, and the rotating component and the inner wall of the second cavity jointly define a sealed movable channel. The limiting component is located in the sealed movable channel. The limiting component is always in sealed contact with the rotating component and prevents the fluid from passing through the sealed movable channel when the rotating component is rotating or not rotating, that is, when the rotating component is rotating. The fluid rotary mechanism is applied to fluid transmission. When the fluid rotary mechanism is used to output mechanical energy through the transmission of fluid, its working principle is as follows: high-pressure fluid enters the containing cavity through the oil inlet, and the high-pressure fluid acts on the rotating part at this time. Since the rotating part is rotatable, and the limit part is always in sealed contact with the rotating part and prevents the fluid from passing through the sealed active channel when the rotating part is rotating or not rotating, so that the high-pressure fluid can only flow through the fluid channel. Therefore, the high-pressure fluid forces the rotating part to rotate along the fluid channel, and outputs torque through the power transmission part of the rotating part, that is, outputs mechanical energy. At the same time, the high-pressure fluid also flows along the fluid channel and is finally discharged at the oil outlet. When the fluid rotary mechanism is used to transport fluid, its working principle is as follows: the power transmission part is connected to the motor, so that the motor drives the rotating part to rotate, and the fluid entering the containing cavity from the oil inlet is discharged from the oil outlet along the fluid channel under the push of the rotating part and the action of the limit part cutting off the sealed active channel. The fluid rotary mechanism is applied to fluid transmission. By using the fluid rotary mechanism, fluid can be transported or mechanical energy can be output. It should be noted that compared with similar products under the condition of the same volume, the working volume cavity is larger and the transmission torque is larger. As a pump, the volume can be designed to the maximum limit, the pressure bearing capacity is stronger, the structure is simple, and it can be designed into a hollow structure. As an actuator, there is no pressure loss, and the fluid pressure is directly converted into torque force, which is more efficient.

[0015] In one embodiment of the present invention:

[0016] The limiting component is rotatably arranged in the sealing movable channel;

[0017] The limiting component is configured to drive the movement of the sealing point under the rotation of the rotating component, and the sealing point is in sealing sliding contact with the outer peripheral surface of the rotating component.

[0018] In one embodiment of the present invention:

[0019] The limiting component is rotatably arranged on the inner wall of the second cavity around a predetermined rotation angle.

[0020] In one embodiment of the present invention:

[0021] The inner wall of the second cavity is provided with a rotation groove extending toward the outer wall of the base;

[0022] The rotating groove has a first abutting wall close to the oil inlet and a second abutting wall close to the oil outlet;

[0023] The limiting component is rotatably arranged in the rotating groove, and the limiting component has a first state of abutting against the first abutting wall and a second state of abutting against the second abutting wall.

[0024] In one embodiment of the present invention:

[0025] The limiting component includes two limiting teeth, and the inner wall of the second cavity is provided with two rotation grooves, the two rotation grooves are respectively close to the oil inlet and the oil outlet, and the two limiting teeth are respectively rotatably arranged in the rotation grooves;

[0026] The limiting tooth has a sealing end extending toward the rotating component, the sealing end defines a sealing point, and the sealing end is in sealing sliding contact with the rotating component.

[0027] In one embodiment of the present invention:

[0028] The rotating member has a first contact end and a second contact end opposite to each other, the first contact end defines a first contact point, and the second contact end defines a second contact point;

[0029] The outer edge of the rotating component extends in an arc shape along the first contact end toward the second contact end and is symmetrical with a straight line from the first contact end to the second contact end as a symmetric center line.

[0030] In one embodiment of the present invention:

[0031] The base has opposing first and second ends;

[0032] The power transmission part is arranged at the rotation center of the rotating component, and the power transmission part is rotatably connected to the first end and the second end.

[0033] In one embodiment of the present invention:

[0034] The power transmission part is connected to the first end and the second end through a bearing;

[0035] A sealing end plate is arranged between the rotating component and the first end and the second end.

[0036] A fluid pump comprises a driving motor and any one of the above-mentioned fluid rotating mechanisms, wherein the driving motor is drivingly connected to a power transmission part.

[0037] An actuator has any one of the above-mentioned fluid rotating mechanisms, wherein the fluid rotating mechanism is constructed so that the fluid enters from the oil inlet and is discharged from the oil outlet to drive the rotating component to rotate.

[0038] The technical solution of the present invention has at least the following beneficial effects:

[0039] The present invention provides a fluid rotating mechanism, which is applied to fluid transmission. By using the fluid rotating mechanism, fluid can be transported or mechanical energy can be output.

[0040] The present invention provides a fluid pump having the above-mentioned fluid rotating mechanism, and the fluid is conveyed or pressurized by the cooperation between the driving motor and the fluid rotating mechanism.

[0041] The present invention provides an actuator having the above-mentioned fluid rotating mechanism, and the actuator can convert the pressure energy of the fluid into mechanical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 It is a schematic structural diagram of the fluid rotating mechanism in Example 1 of the present invention at a first viewing angle;

[0044] Figure 2 It is a schematic structural diagram of the fluid rotating mechanism in Example 1 of the present invention at a second viewing angle;

[0045] Figure 3 is a schematic structural diagram of the fluid rotating mechanism in Embodiment 1 of the present invention at a third viewing angle;

[0046] Figure 4 is a schematic structural diagram of the fluid rotating mechanism in Example 1 of the present invention at a fourth viewing angle;

[0047] Figure 5 for Figure 1 The enlarged view of point V in the middle;

[0048] Figure 6 It is a schematic structural diagram of the fluid rotating mechanism in Example 1 of the present invention at the fifth viewing angle.

[0049] Icons: 10-fluid rotating mechanism; 11-base; 12-rotating component; 13-limiting component; 50-sealing point; 61-fluid channel; 62-sealed movable channel; 71-first contact point; 72-second contact point; 91-oil inlet; 92-oil outlet; 111-first end; 112-second end; 113-sealing end plate; 120-power transmission part; 121-first contact end; 122-second contact end; 130-limiting tooth; 131-sealing end; 910-first abutment wall; 911-second abutment wall. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] In the description of the present invention, it should be noted that the terms "inside", "below", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0057] Example 1

[0058] This embodiment provides a fluid rotating mechanism 10, which is applied to fluid transmission. By using the fluid rotating mechanism 10, fluid can be transported or mechanical energy can be output.

[0059] Please refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 4 , Figure 1 The specific structure of the fluid rotating mechanism 10 in this embodiment at a first viewing angle is shown. Figure 2 The specific structure of the fluid rotating mechanism 10 in this embodiment at a second viewing angle is shown. Figure 3 The specific structure of the fluid rotating mechanism 10 in this embodiment under the third viewing angle is shown. Figure 4 The specific structure of the fluid rotating mechanism 10 in this embodiment under the fourth viewing angle is shown. It should be noted that: Figures 1 to 4 It is a schematic diagram of the transmission process of the fluid rotating mechanism 10.

[0060] The fluid rotating mechanism 10 includes a base 11 , a rotating component 12 and a limiting component 13 .

[0061] The base 11 has a receiving cavity inside, and the outer wall of the base 11 has an oil inlet 91 and an oil outlet 92 connected to the receiving cavity, and the center line of the oil inlet 91 intersects with the center line of the oil outlet 92 and divides the receiving cavity into a first cavity and a second cavity. It should be noted that the angle between the center line of the oil inlet 91 and the center line of the oil outlet 92 is less than 180°.

[0062] The rotating component 12 is rotatably disposed in the accommodating cavity, and a gap is formed between the rotating component 12 and the inner wall of the accommodating cavity. The rotating component 12 has a first contact point 71 and a second contact point 72 that are in sealing contact with the inner wall of the first cavity. The rotating component 12 has a power transmission part 120 that penetrates the end surface of the base 11 (please refer to Figure 6 ), the power transmission unit 120 is used to transmit power or receive power.

[0063] The rotating component 12 and the inner wall of the first cavity together define a fluid passage 61 , and the rotating component 12 and the inner wall of the second cavity together define a sealing movable passage 62 .

[0064] The limiting component 13 is located in the sealing movable channel 62 and is arranged on the inner wall of the second cavity. The limiting component 13 has a sealing point 50 that is in sealing contact with the rotating component 12 .

[0065] The fluid rotating mechanism 10 is constructed such that the limiting component 13 is always in sealing contact with the rotating component 12 through the sealing point 50 when the rotating component 12 is rotating or not rotating, that is, it prevents the fluid entering the accommodating cavity through the oil inlet 91 from passing through the sealing movable channel 62. It should be noted that when the rotating component 12 is rotating or not rotating, the sealing point 50 is always in sealing contact with the rotating component 12 to prevent the fluid from passing through the sealing movable channel 62, but the limiting component 13 does not prevent the rotating component 12 from rotating.

[0066] Specifically, the sealing point 50 always achieves sealing sliding contact with the rotating component 12, and the limiting component 13 is rotatably arranged in the sealing movable channel 62. The limiting component 13 is configured to drive the movement of the sealing point 50 under the rotation of the rotating component 12, and the sealing point 50 is in sealing sliding contact with the outer peripheral surface of the rotating component 12.

[0067] Further, in this embodiment, the limiting component 13 is rotatably disposed on the inner wall of the second cavity around a predetermined rotation angle. It should be noted that the predetermined rotation angle refers to the rotation range of the limiting component 13. By determining the rotation range, the sealing point 50 of the limiting component 13 can always contact the rotating component 12 to achieve sealing when cooperating with the rotating component 12, thereby blocking the sealing activity channel 62.

[0068] Please refer to Figure 5 , Figure 5 for Figure 1 Enlarged view of point V in the middle.

[0069] The inner wall of the second cavity is provided with a rotation groove extending toward the outer wall of the base body 11 .

[0070] The rotation groove has a first abutting wall 910 close to the oil inlet 91 and a second abutting wall 911 close to the oil outlet 92 .

[0071] The limiting component 13 is rotatably arranged in the rotating groove, and the limiting component 13 has a first state abutting against the first abutment wall 910 and a second state abutting against the second abutment wall 911, that is, the limiting component 13 can only rotate between the first abutment wall 910 and the second abutment wall 911, so as to determine a predetermined rotation angle.

[0072] In this embodiment, the limiting component 13 includes two limiting teeth 130 . The two limiting teeth 130 not only block the sealing active channel 62 , but also prevent the fluid from flowing back.

[0073] Two rotating grooves are formed on the inner wall of the second cavity, and the two rotating grooves are respectively close to the oil inlet 91 and the oil outlet 92. Two limiting teeth 130 are respectively rotatably arranged in the rotating grooves. The limiting teeth 130 have a sealing end 131 extending toward the rotating component 12. The sealing end 131 defines the sealing point 50, and the sealing end 131 is in sealed sliding contact with the rotating component 12.

[0074] Please refer again Figure 1 The rotating component 12 has a first contact end 121 and a second contact end 122 opposite to each other. The first contact end 121 defines a first contact point 71, and the second contact end 122 defines a second contact point 72. The outer edge of the rotating component 12 extends from the first contact end 121 to the second contact end 122 in an arc shape and is symmetrical with a straight line from the first contact end 121 to the second contact end 122 as a symmetric midline. The rotating component 12 is in sealing contact with the accommodating cavity through the first contact end 121 and the second contact end 122, so that the fluid can act on the rotating component 12. Through the arc-shaped edge, the outer edge of the rotating component 12 can always be sealed and matched with the limiting component 13.

[0075] For further information, please refer to Figure 6 , Figure 6 Detailed structure of the fluid rotating mechanism 10 in this embodiment at the fifth viewing angle.

[0076] The base 11 has a first end 111 and a second end 112 opposite to each other, and a power transmission part 120 is disposed at the rotation center of the rotating component 12. The power transmission part 120 is rotatably connected to the first end 111 and the second end 112. The power transmission part 120 is a structure for power transmission, which penetrates the second end 112, and the power transmission part 120 can transmit torque or output torque outward. It should be noted that in this embodiment, the power transmission part 120 is connected to the first end 111 and the second end 112 through a bearing, and a sealing end plate 113 is disposed between the rotating component 12 and the first end 111 and the second end 112.

[0077] The inventor has designed the above-mentioned fluid rotating mechanism 10, which is applied to fluid transmission. By using the fluid rotating mechanism 10, fluid can be transported or mechanical energy can be output. Specifically, the fluid rotating mechanism 10 includes a base 11, a rotating component 12 and a limiting component 13. The base 11 has a receiving cavity inside, and the rotating component 12 is rotatably arranged in the receiving cavity. When the rotating component 12 rotates, the first contact point 71 and the second contact point 72 of the rotating component 12 also move at the sealing contact point with the inner wall of the receiving cavity. It should be noted that the movement at this point refers to the relative position movement between the sealing point and the rotating component 12. Furthermore, the center line of the oil inlet 91 intersects with the center line of the oil outlet 92 and divides the accommodating cavity into a first cavity and a second cavity. The outer periphery of the rotating component 12 and the inner wall of the first cavity jointly define the fluid channel 61. The rotating component 12 and the inner wall of the second cavity jointly define the sealing movable channel 62. The limiting component 13 is located in the sealing movable channel 62. The limiting component 13 is always in sealing contact with the rotating component 12 and prevents the fluid from passing through the sealing movable channel 62. It should be noted that, compared with similar products under the condition of the same volume, the working volume cavity is larger, the transmission torque is large, and the volume of the pump can be designed to the maximum limit, the pressure bearing capacity is stronger, the structure is simple, and it can be designed as a hollow structure. As an actuator, there is no pressure loss, and the fluid pressure is directly converted into torque force, which is more efficient.

[0078] The fluid rotating mechanism 10 is applied to fluid transmission. When the fluid rotating mechanism 10 is used to output mechanical energy through fluid transmission, its working principle is as follows:

[0079] refer to Figure 1 , the high-pressure fluid (arrow pointing) enters the accommodating cavity through the oil inlet 91, and the high-pressure fluid acts on the rotating component 12 at this time. Since the rotating component 12 is rotatable, and the limiting component 13 is in sealing contact with the rotating component 12 and prevents the fluid from passing through the sealed movable channel 62, the high-pressure fluid can only flow through the fluid channel 61, so the high-pressure fluid forces the rotating component 12 to flow along the fluid channel 61 (refer to Figures 2 to 4 ) rotates (in the figure, the rotation direction is counterclockwise, which is recorded as reverse rotation), and the torque is output through the power transmission part 120 of the rotating component 12, that is, the mechanical energy is output, and at the same time, the high-pressure fluid also flows along the fluid channel 61 and is finally discharged at the oil outlet 92. Therefore, in other specific embodiments, by replacing the oil inlet 91 with the oil outlet 92, the rotating component 12 can achieve positive rotation, that is, clockwise rotation.

[0080] On the contrary, when the fluid rotating mechanism 10 is used to transport fluid, its working principle is as follows: the power transmission part 120 is connected to the motor, so that the motor drives the rotating part 12 to rotate, and the fluid enters the containing cavity from the oil inlet 91, and is discharged from the oil outlet 92 along the fluid channel 61 under the push of the rotating part 12 and the action of the limiting part 13 cutting off the sealing active channel 62. It should be noted that by controlling the output direction of the motor, that is, the forward or reverse rotation of the motor output shaft, the flow rate and the in-and-out relationship of the oil inlet 91 and the oil outlet 92 can be controlled.

[0081] The fluid rotating mechanism 10 is applied to fluid transmission. By using the fluid rotating mechanism 10 , fluid can be transported or mechanical energy can be output.

[0082] It should be noted that the present embodiment also provides a fluid pump, which includes a driving motor and the above-mentioned fluid rotating mechanism 10, the driving motor is in transmission connection with the power transmission part 120, and the motor drives the rotating component 12 to rotate through the driving of the driving motor, so that the fluid in the accommodating cavity enters from the oil inlet 91, and is discharged from the oil outlet 92 along the fluid channel 61 under the push of the rotating component 12 and the action of the limiting component 13 cutting off the sealing movable channel 62. It should be noted that by controlling the output direction of the motor, that is, the forward or reverse rotation of the motor output shaft, the flow rate and the in-and-out delivery relationship of the oil inlet 91 and the oil outlet 92 can be controlled.

[0083] It should be noted that this embodiment also provides an actuator, which has the fluid rotation mechanism 10 provided above. The fluid rotation mechanism 10 is constructed to allow fluid to enter from the oil inlet 91 and be discharged from the oil outlet 92 to drive the rotating component 12 to rotate, and finally output mechanical energy through the power transmission part 120.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fluid rotating mechanism, characterized in that: include: A base body, wherein the base body has a receiving cavity inside, and the outer wall of the base body has an oil inlet and an oil outlet communicating with the receiving cavity, wherein the center line of the oil inlet intersects with the center line of the oil outlet and divides the receiving cavity into a first cavity and a second cavity; a rotating component, the rotating component being rotatably disposed in the accommodating cavity, the rotating component having a gap with the inner wall of the accommodating cavity, the rotating component having a first contact point and a second contact point in sealing contact with the inner wall of the first cavity, and the rotating component having a power transmission part penetrating the end surface of the base body; The rotating component and the inner wall of the first cavity together define a fluid channel, and the rotating component and the inner wall of the second cavity together define a sealing movable channel; A limiting component, the limiting component is located in the sealing movable channel and is arranged on the inner wall of the second cavity, and the limiting component has a sealing point in sealing contact with the rotating component; The fluid rotating mechanism is constructed so that the limiting component always maintains sealing contact with the rotating component and prevents the fluid from passing through the sealed movable channel; The limiting component is rotatably arranged in the sealing movable channel; The limiting component is configured to drive the sealing point to move under the rotation of the rotating component, and the sealing point is in sealing sliding contact with the outer peripheral surface of the rotating component; The limiting component is rotatably arranged on the inner wall of the second cavity around a predetermined rotation angle; The inner wall of the second cavity is provided with a rotation groove extending toward the outer wall of the base; The rotation groove has a first abutment wall close to the oil inlet and a second abutment wall close to the oil outlet; The limiting component is rotatably disposed in the rotating groove, and the limiting component has a first state abutting against the first abutting wall and a second state abutting against the second abutting wall; The limiting component includes two limiting teeth, the inner wall of the second cavity is provided with two rotating grooves, the two rotating grooves are respectively close to the oil inlet and the oil outlet, and the two limiting teeth are respectively rotatably arranged in the rotating grooves; The limiting tooth has a sealing end extending toward the rotating component, the sealing end defines the sealing point, and the sealing end is in sealing sliding contact with the rotating component; The rotating member has a first contact end and a second contact end opposite to each other, the first contact end defines a first contact point, and the second contact end defines a second contact point; The outer edge of the rotating component extends from the first contact end to the second contact end in an arc shape and is symmetrical with a straight line from the first contact end to the second contact end as a symmetric center line.

2. The fluid rotating mechanism according to claim 1, characterized in that: The substrate has opposing first and second ends; The power transmission part is disposed at the rotation center of the rotating component, and the power transmission part is rotatably connected to the first end and the second end.

3. The fluid rotating mechanism according to claim 2, characterized in that: The power transmission part is connected to the first end and the second end through a bearing; A sealing end plate is provided between the rotating component and the first end and the second end.

4. A fluid pump, characterized in that: include: Drive motor; as well as In the fluid rotating mechanism according to any one of claims 1 to 3, the driving motor is drivingly connected to the power transmission part.

5. An execution device, characterized in that: The actuator has the fluid rotating mechanism according to any one of claims 1 to 3, and the fluid rotating mechanism is constructed so that the fluid enters from the oil inlet and is discharged from the oil outlet, thereby driving the rotating component to rotate.

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