A pneumatic motor

Abstract

The present invention discloses a pneumatic motor, which includes a housing and a rotor rotatably arranged in the housing. A rotating shaft passing through the housing is provided on the rotor. An air inlet is formed at one end of the housing, and an air outlet is provided at the other end. The rotor is composed of two or more rotor units arranged in sequence from outside to inside. Each rotor unit includes multiple rotor blades, and the adjacent rotor blades in the multiple rotor blades are connected end to end. Spiral air ducts with the same direction are respectively arranged between the rotor units. The two ends of the spiral air duct respectively face the air inlet and the air outlet. There are multiple spiral air ducts between each rotor unit, and they are evenly distributed in a circle. The pneumatic motor provided by the present invention can effectively reduce resistance and increase the working area by arranging multiple rotor units and the spiral air ducts therebetween, thereby effectively improving the conversion efficiency and increasing the rotational speed of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of power devices, and particularly to a pneumatic motor. Background Art

[0002] A pneumatic motor is a device that converts the potential energy of compressed air into mechanical energy and is widely used in various power fields.

[0003] Existing pneumatic motors mainly include a housing and a rotor disposed inside the housing. The rotation of the rotor is driven by air flow to achieve power output, mainly manifested as the rotation of the rotating shaft. The rotation of the rotor is achieved by driving the outside of the rotor with compressed air, and finally the rotation of the rotating shaft is output. For example, a pneumatic motor provided by CN2014204424555 and a pneumatic motor disclosed in CN201611031078. This method mainly has the following problems: First, the air flow mainly does work on the outside of the rotating blades. The air flow flows between the outside of the rotating blades and the housing, and the area where it can act is small. On the other hand, the introduced air flow fails to be discharged in time and forms a "back pressure resistance", which affects the rotation of the rotor, greatly restricting the conversion efficiency of the air flow in the pneumatic motor and making it difficult to increase the motor speed. Summary of the Invention

[0004] In view of the above deficiencies, the present invention provides a pneumatic motor to solve the problems of low rotation efficiency and slow speed.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A pneumatic motor includes a housing and a rotor rotatably disposed inside the housing. A rotating shaft passes through the housing on the rotor. An air inlet is opened at one end of the housing, and an air outlet is provided at the other end. The rotor is composed of two or more rotor units arranged in sequence from outside to inside. Each rotor unit includes multiple rotating blades, and the adjacent rotating blades in the multiple rotating blades are connected end to end. Spiral air ducts with the same direction are respectively provided between the rotor units. The two ends of the spiral air duct respectively face the air inlet and the air outlet, and there are multiple spiral air ducts between each rotor unit, which are evenly distributed in a circle.

[0007] Further, a collar is fixedly sleeved on the outer periphery of the rotor, and a spiral air duct is provided between the collar and the outer periphery of the rotor. The direction of the spiral air duct between the collar and the rotor is the same as that of the spiral air duct between the rotor units. There are multiple spiral air ducts between the collar and the rotor, which are evenly distributed in a circle.

[0008] Further, a slit with the same spiral direction as the spiral air duct is opened on the rotating blade of the rotor unit, and the slit penetrates both the inner and outer sides of the rotating blade.

[0009] Further, each rotor unit has three rotor blades, and the three rotor blades are connected end to end to form a structure with a triangular cross-section in the transverse direction.

[0010] Further, there are three spiral air ducts between the rotor units, which are evenly distributed in a circle.

[0011] Further, the rotor units are deflected at a certain angle layer by layer.

[0012] Further, the rotating shaft is connected to the housing through a sealed bearing.

[0013] Further, the rotor unit has a structural form in which the rotor blades rotate spirally 120° around the axis of the rotor from one end face to the other end face.

[0014] Further, there are multiple rotors, and the multiple rotors are coaxially arranged on the rotating shaft.

[0015] Further, when the spiral directions of the spiral air ducts of two adjacent rotors are opposite, one of the rotors is mounted on the rotating shaft through a planetary gear.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a pneumatic motor. By arranging multiple rotor units and the spiral air ducts therebetween, the resistance can be effectively reduced, the working area can be increased, thereby effectively improving the conversion efficiency and increasing the motor speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments.

[0018] Figure 1 It is a schematic structural diagram of a pneumatic motor from one perspective in Embodiment 1;

[0019] Figure 2 It is a schematic structural diagram of a pneumatic motor from one perspective in Embodiment 1;

[0020] Figure 3 It is a schematic structural diagram of a rotor in Embodiment 1;

[0021] Figure 4 It is a schematic structural diagram of a rotor unit in Embodiment 1;

[0022] Figure 5 It is a schematic structural diagram of a pneumatic motor from one perspective in Embodiment 2;

[0023] Figure 6 It is a schematic structural diagram of a pneumatic motor from one perspective in Embodiment 2;

[0024] Figure 7It is a schematic assembly diagram of two rotors in Embodiment 2.

[0025] Among them, the marks shown in the figure are: 10 - housing; 11 - air inlet; 12 - air outlet; 13 - cylinder liner; 14 - cylinder head; 20 - rotor; 21 - rotor blade; 22 - gap; 30 - rotating shaft; 40 - spiral air duct; 50 - sealed bearing; 60 - planetary gear; 70 - collar. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] Please refer to Figures 1 to 4, this preferred embodiment provides a pneumatic motor, which includes a housing 10 and a rotor 20 rotatably disposed within the housing 10. The housing 10 is a hollow cylindrical structure, mainly composed of a cylinder liner 13 in the middle and cylinder heads 14 at both ends. An air inlet 11 communicating with the interior of the housing 10 is provided on one side end of the housing 10, that is, on one of the cylinder heads 14, for introducing external air flow (compressed air) into the housing 10 and doing work on the rotor 20 to make the rotor 20 rotate. An air outlet 12 is provided on the other end of the housing 10, that is, on the other cylinder head 14, for discharging the air flow after doing work on the rotor 20. In this preferred embodiment, the air inlet 11 and the air outlet 12 are oppositely arranged, respectively provided on the cylinder heads 14 at both ends of the housing 10. Specifically, a hollowed-out structure is made on the cylinder head 14 to form an open structure. The rotor 20 is located between the air inlet 11 and the air outlet 12, facilitating the direct action of the external air flow on the rotor 20 after intake and facilitating the air flow after doing work to exit from the air outlet 12 to reduce the "back pressure resistance". It should be noted that in the preferred embodiment, the air inlet 11 can be a relatively large hollowed-out area for large-area air intake. For example, in this preferred embodiment, the air inlet 11 is opened in all quadrants of the cylinder head 14 and can act on the entire end of the rotor 20; the air outlet 12 is also preferably a relatively large hollowed-out area to facilitate the timely outflow of the air flow and reduce the resistance. For example, in this preferred embodiment, the air outlet 12 is opened in all quadrants of the cylinder head 14, and the air flow after doing work on the rotor 20 can directly exit. A rotating shaft 30 passing through the housing 10 is provided on the rotor 20. The rotating shaft 30 is coaxially rotatably installed on the cylinder heads 14 at both ends of the housing 10, and at least one end extends out of the cylinder head 14 of the housing 10. The rotor 20 is coaxially arranged on the rotating shaft 30 and can rotate together. Thus, the rotor 20 can drive the rotating shaft 3 to rotate, converting air potential energy into mechanical energy and outputting it in the form of the rotation of the rotating shaft 30.

[0029] The rotor 20 is composed of five rotor units arranged in sequence from outside to inside. Each rotor unit includes three rotor blades 21. The adjacent rotor blades 21 among the three rotor blades 21 are connected end to end to form a structure with a triangular cross-section in the transverse direction. The rotor units are connected to each other so that all the rotor units can operate together. There are respectively provided spiral air ducts 40 with the same direction between adjacent rotor units. The spiral air ducts 40 are arranged clockwise. There are three spiral air ducts 40 respectively between the rotor units, which are evenly distributed in a circle. The two ends of the spiral air ducts 40 respectively face the air inlet 11 and the air outlet 12. That is, one end of each spiral air duct 40 is aligned with the air inlet 11 so that when the external air flow enters the housing 10 through the air inlet 11, it directly blows into the spiral air duct 40. The other end of the spiral air duct 40 is aligned with the air outlet 12 so that when the air flow after doing work on the rotor 20 comes out of the spiral air duct 40, it directly exits from the air outlet 12, effectively reducing the "back pressure resistance". At the same time, the rotor 20 is composed of multiple rotor units arranged in sequence from outside to inside. These rotor units gradually decrease, and there are respectively provided spiral air ducts 40 between the rotor units. Through the multi-channel air ducts, on the one hand, the work area can be increased, the work efficiency can be improved to increase the converted rotational speed, and on the other hand, the mass can be effectively reduced, and the area of the non-working area (the end face of the rotor 20) can be reduced to reduce the resistance, thereby improving the conversion efficiency. A collar 70 is fixedly sleeved on the outer periphery of the rotor 20. The collar 70 is a hollow cylindrical structure with both ends open. The collar 70 is fixedly sleeved on the outermost rotor unit. There is a spiral air duct 40 between the collar 70 and the outer periphery of the outermost rotor unit of the rotor 20. The direction of the spiral air duct 40 between the collar 70 and the rotor 20 is the same as that of the spiral air duct 40 between the rotor units to ensure that the rotor 20 can be driven to rotate in the same direction when the air flow does work. By providing the collar 70 and forming a spiral air duct 40 between the collar 70 and the rotor 20, the work area can be further increased, and the external structure of the rotor 20 can be effectively utilized to improve the efficiency. There are three spiral air ducts 40 between the collar 70 and the rotor unit, which are evenly distributed in a circle.

[0030] During implementation, the external air flow enters from the air inlet 11 and enters each spiral air duct 40. The air flow flows from one end of the spiral air duct 40 to the other end to do work on the rotor 20 to drive the rotor 20 to rotate. According to Bernoulli's theorem, the rotation direction of the rotor 20 is opposite to the spiral direction. In this preferred embodiment, the spiral air duct 40 is arranged clockwise, so the rotor 20 rotates counterclockwise and drives the rotating shaft 30 to rotate counterclockwise to achieve the conversion of air potential energy into mechanical energy. After the air flow comes out of the spiral air duct 40, it directly exits from the air outlet 12. As in this preferred embodiment, the external air flow flows into the air inlet 11 provided on the cylinder head 14 and enters a part of the spiral air duct 40 facing the air inlet 11 to do work on the rotor 20. As the rotor 20 rotates, other spiral air ducts 40 are sequentially aligned with the air inlet 11 so that the air flow can enter the spiral air duct 40 facing it. After the air flow passes through the spiral air duct 40, it directly exits from the air outlet 12. The air flow that has done work on the rotor 20 can directly exit, effectively reducing the resistance. Through the above method, the "back pressure resistance" can be effectively reduced, and the working area formed by the spiral air duct 40 is relatively large, so the conversion efficiency can be effectively improved and the motor speed can be increased.

[0031] In the preferred embodiment, a slit 22 with the same spiral direction as the spiral air duct 40 is formed on the rotor blade 21 of the rotor unit. The slit 22 penetrates through the inner and outer sides of the rotor blade 21. The slit 22 is spirally formed from one end of the rotor blade 21 to the other end. A part of the air flow doing work in the spiral air duct 40 can enter inward through the slit 22 into the spiral air duct 40 between two adjacent rotor units to converge with other air flows to do work on the rotor 2, forming a spiral air flow. This air flow spirally flows inward, which can accelerate the air flow and reduce the back pressure resistance at the same time to promote the rotation of the rotor, ultimately improving the conversion efficiency and increasing the speed.

[0032] In the preferred embodiment, the rotor units are formed with a certain angle of deflection layer by layer, which is convenient for connecting adjacent rotor units and easy to form the spiral air duct 40. The innermost rotor unit is connected to the rotating shaft 30 through a sleeve. The rotating shaft 30 is connected to the housing 10 through a sealed bearing 50 to ensure smooth rotation.

[0033] In this preferred embodiment, the rotor unit has a structural form in which the rotor blades 21 rotate spirally by 120° around the axis of the rotor 20 from one end face to the other end face. That is, in each rotor unit, the three rotor blades 21 form a triangular shape at the end face, and the other end face is also a triangular shape with the same structure, but rotated by 120° around the axis of the rotor 20. The middle part is smoothly transitioned and twisted to form the entire rotor unit, and the transverse cross-section of each rotor unit is triangular. The rotor units obtained by twisting can form spiral air ducts 40 with each other, so as to facilitate the formation of the spiral air ducts 40. Of course, the preparation of the rotor units can also be achieved in the form of overlapping tiles (gradually twisting and stacking layer by layer), which is convenient for opening air ducts with special-shaped structures. Of course, in the preferred embodiment, the spiral air duct 40 is in the form of a smooth spiral channel to facilitate the passage of air flow.

[0034] Embodiment 2

[0035] Please refer to Figures 5 to 7 , this preferred embodiment provides a pneumatic motor. Different from Embodiment 1, in this preferred embodiment, there are multiple rotors 20, specifically two rotors 20 coaxially arranged on the rotating shaft 30; the rotation directions of the spiral air ducts 40 of two adjacent rotors 20 are opposite. Specifically, the rotation direction of the spiral air duct 40 of the rotor 20 close to the air inlet 11 is clockwise, while the rotation direction of the spiral air duct 40 of the rotor 20 close to the air outlet 12 is counterclockwise. Among them, the rotor 20 close to the air outlet 12 is installed on the rotating shaft 30 through a planetary gear 60. Specifically, the sun gear of the planetary gear 60 is fixedly installed on the rotating shaft 30, the planetary gears of the planetary gear 60 are rotatably installed on the support shafts, the support shafts are fixedly installed on the cylinder head of the housing 10, and the ring gear of the planetary gear 60 is fixedly installed on the rotor 20.

[0036] During implementation, air flow enters from the air inlet 11 and blows into the spiral air duct 40 of the first rotor 20, driving the first rotor 20 to rotate counterclockwise. The rotating shaft 30 rotates counterclockwise accordingly. After passing through the spiral air duct 40, the air flow exits the spiral air duct 40, enters the spiral air duct 40 of the next rotor 20 to do work on this rotor 20, and then exits from the air outlet 12, causing this rotor 20 to rotate clockwise. Since this rotor 20 is connected to the rotating shaft 30 through the planetary gear 60, after conversion by the planetary gear 60, this rotor 20 drives the rotating shaft 30 to rotate counterclockwise. At this time, the drives of the two rotors 20 on the rotating shaft 30 are in the same direction. That is, by setting multiple rotors 20, and when the spiral directions of the spiral air ducts 40 of two adjacent rotors 20 are opposite, one of the rotors 20 is installed on the rotating shaft 30 through the planetary gear 60. At this time, it can be ensured that the drives of the two rotors 20 on the rotating shaft 30 are in the same direction, that is, the rotating shaft 30 can be driven to rotate in the same direction. By setting multiple rotors 20, the air flow coming out of the spiral air duct 40 of the previous rotor 20 can enter the spiral air duct 40 of the next rotor 20 to do work, so as to realize the reuse of the air flow, thereby improving the conversion efficiency and increasing the motor speed.

[0037] Of course, in other preferred embodiments, it is also possible to set rotors 20 all in the same direction, that is, to set multiple rotors 20 with the spiral air ducts 40 in the same direction. The driving directions of the rotors 20 all in the same direction on the rotating shaft 30 are the same. By setting multiple rotors 20, the conversion efficiency is improved and the motor speed is increased.

[0038] As described above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A pneumatic motor, comprising a housing (10) and a rotor (20) rotatably disposed within the housing (10), wherein a rotating shaft (30) passing through the housing (10) is provided on the rotor (20), and characterized in that: An air inlet (11) is provided at one end of the housing (10), and an air outlet (12) is provided at the other end. The rotor (20) is composed of more than two rotor units arranged in sequence from outside to inside. Each rotor unit includes a plurality of rotor blades (21). The adjacent rotor blades (21) among the plurality of rotor blades (21) are connected end to end. Spiral air ducts (40) with the same direction are respectively provided between the rotor units. The two ends of the spiral air duct (40) respectively face the air inlet (11) and the air outlet (12). There are multiple spiral air ducts (40) between the rotor units, which are evenly distributed in a circle. A collar (70) is fixedly sleeved on the outer periphery of the rotor (20). A spiral air duct (40) is provided between the collar (70) and the outer periphery of the rotor (20). The direction of the spiral air duct (40) between the collar (70) and the rotor (20) is the same as that of the spiral air duct (40) between the rotor units. There are multiple spiral air ducts (40) between the collar (70) and the rotor (20), which are evenly distributed in a circle. A slit (22) with the same spiral direction as the spiral air duct (40) is provided on the rotor blade (21) of the rotor unit, and the slit (22) penetrates through the inner and outer sides of the rotor blade (21).

2. The pneumatic motor according to claim 1, wherein: Each rotor unit has three rotor blades (21), and the three rotor blades (21) are connected end to end to form a structure with a triangular cross-section in the transverse direction.

3. The pneumatic motor according to claim 2, characterized in that: There are three spiral air ducts (40) between the rotor units, which are evenly distributed in a circle.

4. The pneumatic motor according to claim 1, wherein: The rotor units are deflected at a certain angle layer by layer.

5. The pneumatic motor according to claim 1, characterized in that: The rotating shaft (30) is connected to the housing (10) through a sealed bearing (50).

6. The pneumatic motor according to claim 2, wherein: The rotor unit has a structural form in which the rotor blade (21) rotates spirally 120° around the axis of the rotor (20) from one end face to the other end face.

7. The pneumatic motor according to claim 1, characterized in that: There are multiple rotors (20), and the multiple rotors (20) are coaxially arranged on the rotating shaft (30).

8. The pneumatic motor according to claim 7, characterized in that: When the spiral directions of the spiral air ducts (40) of two adjacent rotors (20) are opposite, one of the rotors (20) is installed on the rotating shaft (30) through a planetary gear (60).

Images