WO2004003360A1

WO2004003360A1 - In-turn rotary piston engine

Info

Publication number: WO2004003360A1
Application number: PCT/CN2003/000488
Authority: WO
Inventors: Chunhing Fong; Lude Chang
Original assignee: Chunhing Fong; Lude Chang
Priority date: 2002-07-01
Filing date: 2003-06-25
Publication date: 2004-01-08
Also published as: CN1564906A; AU2003255065A1

Abstract

The invention relates to a rotary piston engine, specifically, to an in-turn rotary piston engine. The engine has a particular in-turn device, which controls two or two pairs of pistons to rotate/stop in turn within a cylindrical (or truncated conic) cylinder, thereby the volume of cylinder varies periodically, and thus the engine completes admission, compression, expansion, and exhaust. The invention also relates to other machines operated by the in-turn device, such as an in-turn rotary piston compressor or pump.

Description

Wheel-step rotary piston engine

Technology leader

The present invention relates to a rotary-piston engine, and more particularly, the present invention relates to the use of a wheel-step rotary-piston engine that controls two or two pairs of pistons in a cylindrical (or circular table) shape through a uniquely designed wheel stepper. The engine gas rainbow rotates and stops in turn, causing the working volume in the cylinder to change periodically, so that the engine completes the work process. The invention also relates to other construction machines such as rotary piston compressors and pumps controlled by the wheel stepper. Background technique

It is well known that a rotary piston engine without a crankshaft and a connecting rod mechanism, or a "rotary internal combustion engine", a "rotor engine", or a "Wangkel rotor engine", because it must use a gear as a guide shaft Therefore, the running trajectory of the three ends of the rotor must be corrugated, which will cause an air leakage problem that is difficult to overcome.

In addition, there are still some problems with rotary-piston engines that need to be properly addressed. The main problems involved are summarized as follows:

(1) Self-compression cannot reach a compression ratio of 8: 1. Even if the compression ratio of 8: 1 is achieved by using a booster pump, the working gas expansion of its work fails to reach 8 times, and most of the gas is exhausted at less than 7 times. Obviously The thermal efficiency of its fuel for work is very low.

For the prior art of this kind of design, please refer to the design scheme disclosed in US Patent No. 5,415,141.

(2) A spring or the like is used to push the piston close to the cylinder wall. Because it needs a large expansion and contraction and works at a higher temperature, the spring is easily fatigued and annealed, and gradually loses its elasticity.

(3) The compression of the working gas is not directly compressed in the combustion chamber, but is compressed by another compression chamber. The compressed pre-combustion gas is transported into the combustion chamber to ignite and explode. Such a process has certain technical difficulties.

(4) Even if the problem of engine gas rainbow can be overcome,

Confirm this The control mechanism of the plug operation is very complicated, and it needs to be composed of 18 gears. The gear shaft has not only a sleeve shaft but also a shaft top shaft.

For the prior art of this kind of design, please refer to the design scheme disclosed in U.S. Patent 5,133,317. Summary of the Invention

The object of the present invention is to provide a rotary piston engine controlled by a brand new wheel stepper with its unique design, which can overcome the technical problems described above.

The invention provides a wheel-step rotary piston engine. The engine working process controlled by a wheel stepper includes a cylindrical cylinder, a rotary piston, a wheel stepper, an air intake hole, an exhaust hole, a spark plug or an injection nozzle. ; among them,

The wheel stepper is composed of two semicircular gears having a common shaft and interlaced with each other at a predetermined phase angle, and corresponding two gears each having a convex part and meshing with the concentric shaft. The semicircular gear has a semicircular solitary light edge without gear teeth, and the outer contour of the lock bolt is set to coincide with the semicircular arc light edge, so that the outer edge of the lock bolt can be It is in close contact with the Guangyi and relatively slides, so that the gear with the lock bolt cannot rotate and is temporarily locked by the light edge, until the lock pin relatively slides to the end of the light edge, and then is further locked. After unlocking, the gear with the lock bolt can rotate again; connected, the piston divides the cylinder of the engine into multiple cavities, and uses the common axis of the two semicircular gears as the output of the engine The shaft and mesh with the inertia flywheel of the engine;

Thereby, through the control of the wheel stepper, the two pistons rotate and stop in turn in the engine cylinder, and the stop-turned pistons are temporarily locked and cannot be rotated until the lock is unlocked and locked The piston can rotate again, causing the volume of the plurality of cavities between the piston and the inner surface of the gas rainbow to change periodically, so that each of the cavities can achieve intake, compression, combustion expansion and exhaust Gas working process.

Although the operation method of the piston and the piston in the cylinder of the wheel-step rotary piston engine provided by the present invention is somewhat similar to the technical solution disclosed in USP 5,133,317, the structure and composition of the wheel stepper of the invention Single tube, only two pairs of gears can be used to control the engine Rotating motion of the piston in the cylinder and the whole process of starting the movement.

The working principle of the wheel stepper provided by the present invention is to control two correspondingly designed gears to rotate and stop in turn during continuous directional rotation by two coaxial semicircular gears.

The technical characteristics, composition, and performance of the wheel-step rotary piston engine of the present invention will be further understood by referring to the accompanying drawings and the description of the preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic perspective view of a weekly stepper.

Figure 2-, 1, Figure 2-2, Figure 3-1, Figure 3-2, Figure 4-1, Figure 402 are exploded views of the wheel stepper, showing the interaction of the gears when they are rotated to different angles.

Figure 5-1 and Figure 5-2 are perspective views of a single scoop piston.

Fig. 6 is a schematic cross-sectional view of a cylinder block.

Figure 7 is a cross-sectional view of a pair of single scoop pistons placed in a cylinder (or a liquid cylinder).

Figure 8-1 and Figure 8-2 are exploded views of the half-circle stepper.

Fig. 9 is a schematic perspective view of a half-circle stepper.

Figure 10-1 and Figure 10-2 are perspective views of a double scoop piston.

Fig. 11 is a cross-sectional view of a scoop piston placed in a cylinder (or liquid pump).

Figure 12 is a cross-sectional view of a cylinder of an internal combustion engine, where 13 is a spark plug (or fuel nozzle). Fig. 13 is a cross-sectional view of a pair of double-marked pistons placed in a cylinder of an internal combustion engine.

Figure 14-1 and Figure 14-2 are exploded views of the two pairs of gears of the half-circle stepper. The gear positions correspond to the pistons of Figure 13. The dashed lines indicate the connection system.

The series of Figure 15-a and Figure 15-b show that under the control of a wheel stepper, the two pairs of pistons in the cylinder run alternately to meet the operating requirements of the internal combustion engine. ,

FIG. 16 is a schematic perspective view of two pairs of pistons equipped with half-circle steppers.

Fig. 17-1, Fig. 17-2, Fig. 18-1, and Fig. 18-2 are three-dimensional schematic diagrams showing the dual pistons, which can take many different shapes.

Fig. 19-1, Fig. 19-2, Fig. 20, Fig. 21-1, Fig. 21-2, and Fig. 22 are diagrams showing that the gear of the stepper can be made into a rigid body and a free shaft with the piston. -L FIG. ^23, FIG. ²³ _ ^2, a diagram illustrating FIG. 23-3 21-1, a top view of FIG. ² sets of 21_ in the cylinder of FIG. 22 to FIG rear free shaft, a bottom side and FIG.

Fig. 24 is a sectional view taken without KL in Fig. 23-2.

Figure 23 is the semicircular gear of the wheel stepper to the gear of Figure 23-2 to control the operation of the piston. Fig. 26 is a schematic diagram of a pair of single-screw piston internal combustion engines, in which 15, 16 are valves for controlling intake and 17 are valves for controlling exhaust.

Figure 27 is a schematic diagram of the operation procedure of a single-screw piston internal combustion engine.

FIG. 28 shows a description of the embodiment in which the cams 25, 26 are driven by the gears 28 on the output shaft to control the valves 15, 16

Therefore, in order to explain the operation of the 'wheel-step rotary piston engine' designed by the present invention, the composition of the wheel-stepper and its working principle must be explained first.

The composition of the wheel stepper and its working principle will now be described.

Fig. 1 is a schematic diagram of a stepping device. Reference numerals 1 and 2 in the figure are two semicircular gears, respectively, which are arranged to be staggered to a predetermined phase angle, preferably a phase angle position of ISO degrees. Each of the semicircular gears 1, 2 has a semicircular solitary light edge without gear teeth, respectively. The two semicircular gears 1, 2 are coaxial, and of course they can also be made from the same rigid body. The reference numerals 3 and 4 are special gears corresponding to the gears 1 and 2. The gears 3 and 4 are concentric shafts, and they may form the same bearing instead of a coaxial sleeve. Each of the gears 3 and 4 has a locking bolt with a convex portion, and an outer edge of the locking bolt is arranged to be consistent with the semicircular arc-shaped light edge, that is, the light edge of the gear 1 can be The outer edges of the lock bolts of the gear 3 are combined and relatively slide, and the light edge of the gear 2 may be combined with the outer edges of the lock bolts of the gear 4 and relatively slide.

For the convenience of explanation, put the combination of Fig. 1 flat, and shift the gears 1 and 3 to the left, as shown in Fig. 2-1 and Fig. 2-2. As can be seen from the figure, if the gears 1 and 2 are rotated counterclockwise, the outer edge of the lock pin of the gear 3 can be combined with the light edge of the gear 1 and slide relative to each other, so that the gear 3 with the lock pin is lost by the gear. The light edge of 1 is temporarily locked and cannot be rotated; at the same time, in the meshing transmission of the paired gear teeth on the gear 4 and the gear 2, the gear 4 can rotate clockwise.

Gears 1 and 2 continue to rotate counterclockwise to Figure 3-1 and Figure 3-2. The lock bolt of Gear 3 continues to slide Move to the end of the light side of gear 1, and the lock pin of gear 4 will turn to the light side of gear 2.

When the gears 1,2 are turned to the positions shown in Figure 4-1 and Figure 4-2, the lock bolt of Gear 3 is pushed away from the light edge of Gear 1 to unlock Gear 3. At this time, Gear 3 can be in the gear. The meshing transmission of the paired gear teeth on 1 rotates clockwise, and the lock bolt of gear 4 is turned into the light side of gear 2 so that gear 4 is locked.

It can be seen that the working principle of the wheel stepper provided by the present invention is to control two correspondingly designed gears to rotate and stop in turn during continuous directional rotation by two coaxial semicircular gears.

It is not difficult to see that, because the gears 3 and 4 each have a locking bolt of a convex part, each time the gears 1 and 2 rotate and the gears 3 and 4 make one revolution, this kind of stepper is called a one-step stepper.

For the same reason, if the gears 3 and 4 are set as lock bolts with two convex parts, as shown in the gears 9 and 10 described in Figure 8-1 and Figure 8-2, the coaxial gears 7, 8 each After one revolution, the gears 9, 10 each make half a revolution, so this kind of stepper is called a half-circle stepper.

An introduction to the embodiment of a wheel-step rotary piston engine

If the gears 9 and 10 of the half-circle stepper are respectively fitted with the double scoop pistons of Fig. 10-1 and Fig. 10-2 and then installed in the cylinder of Fig. 12, it is the wheel-step rotary piston engine shown in Fig. 13. schematic diagram. In the figure, 11 is an intake hole, 12 is an exhaust hole, and 13 is a spark plug or a fuel nozzle.

It can be seen from FIG. 13 that the gas rainbow is divided into four cavities by two pairs of pistons, namely, I-II, II-III, III-IV, and I-IV.

If the piston I III of FIG. 13 is coaxial with the gear 31 of FIG. 14-1, the piston II IV is coaxial with the gear 32 of FIG. 14-2, and the common axis of the semicircular gears 21 and 22 is used as the output shaft, and at the same time as the inertia flywheel of the engine Mesh.

According to the above connection relationship, the operation conditions of the engine cylinders at the moments A to H are listed in the series of Figure 15-a and Figure 15-b.

In FIG. L ⁵ _a, FIG. 15-b, the gear set 21, 22 to rotate clockwise ^^.

At time A, the gas mixture in the I-II chamber of the cylinder has been completely compressed, and the lock pin of the gear 31 coaxial with the piston I III will be turned into the light side of the gear 21 and locked, and the coaxial with the piston II IV will be locked. Gear 32 will be unlocked. Driven by the inertia flywheel, gears 21 and 22 will continue to rotate counterclockwise.

At time B, the lock bolt of gear 31 has been turned into the light edge of gear 21 and has been locked. The spark plug (Or fuel injection p and) 13 The ignition of the compressed gas in the I-II chamber is immediately ignited. Since the piston I III is locked, the high-temperature and high-pressure gas only pushes the piston II IV to continue to rotate clockwise.

Driven by the high-temperature and high-pressure gas, the piston II and IV pass through the process of time C, time D, and time E. The I-II chamber is the process of high-temperature and high-pressure gas expansion to perform work. The Π-ΙΠ chamber is the process of exhaust gas emission, the III-IV chamber is the process of inhaling the mixed gas, and the I-IV chamber is the process of compressing the mixed gas.

At time E, the high-temperature and high-pressure gas in room I-II has completed its work, exhaust gas has been exhausted in room ll-IIl, mixed gas has been inhaled in room III-IV, and compressed gas has been completed in room I-IV. situation.

The following moments F, G, and H are similar to the situation at moments B, C, and D, that is, by time H, two work processes of gas combustion explosion work have been performed. In other words, the engine's gas cylinder exploded twice every revolution of the engine's output shaft.

FIG. 16 is a perspective view of a combination of a wheel stepper and a piston. In the figure, the piston I III is coaxial with the gear 31, and the piston II IV is coaxial with the gear 32.

The compression ratio can be determined by the amount of clearance space left when the two pistons abut. In addition to the situation shown in Figure 10-1 and Figure 10-2, the piston can also be shown in Figure 17-1, Figure 17-2, or Figure 18-1, and Figure 18-2. Of course, if the air inlet and exhaust holes are set on the cylinder head, the clearance space of the piston must also be designed accordingly.

The wheel stepper can be designed to place two pairs of gears on the same outer side of the gas rainbow or separated on both sides of the cylinder. If it is considered that the gears coaxial with the piston are manufactured integrally with the piston, the single-scoop piston can be taken as shown in Figure 19-1 and Figure 19-2 (the two are the same, but they are seen from different angles). The free shaft of FIG. 20 is installed in the gas red. At this time, the two pairs of gears of the wheel stepper are respectively on the two outer sides of the cylinder.

The double scoop piston can be selected as shown in Figure 21-1 and Figure 21-2. Put the two on the free axis of Figure 22, as shown in Figure 23-1 (top view) and Figure 23-3 (suppressed view). Put it into the cylinder as shown in Figure 23-2. The two pairs of gears of the stepper are on the two outer sides of the cylinder.

FIG. 24 is a cross-sectional view taken along the broken line KL in FIG. 23-2, and the close cooperation between the piston and the free shaft can be seen in the figure. Figure 25 shows the two gears of the wheel stepper meshing with the corresponding semicircular gears when they are on both sides of the cylinder (oblique hatching indicates the longitudinal section of the cylinder and the cylinder head).

If the engine is a gasoline engine, two parallel spark plugs may be provided in the cylinder. In addition, the air inlet 11 on the gas rainbow can be provided with a valve to control the amount of intake air.

FIG. 26 is a pair of single-scoop piston wheel-rotating piston engines controlled by a one-step wheel stepper. If the engine is a gasoline engine, and the compression ratio of the gasoline engine is 9.5, the volume expansion factor of the work gas in the gas rainbow Can be designed to reach 13 times or more, almost exhausted the expansion of high-temperature and high-pressure gas. In addition, the parts marked "15" and "16" in Figure 26 refer to the gas valve that controls the gas siphon. The opening and closing are synchronized. The part mark "17" refers to the valve that controls the exhaust of the gas iris, and the part mark "18" refers to the spark plug or the fuel injection nozzle.

In the engine structure shown in FIG. 26, the gas rainbow is divided into two spaces by two pistons. If the piston is locked downward, as shown by the reader, the space on the left side of the gas red is called the front chamber. The right side is called the back chamber.

Here, a further description is given in conjunction with the starting state series of Figure 27 and its running program table 1:

Running program table one

'Suction air means the air that does not contain fuel.

'Breathing gas' means breathing air containing fuel. It can be seen from the program table that in the four working processes of gas-compression gas-combustion gas and gas expansion work-exhaust gas necessary for the operation of the internal combustion engine, the gas intake and exhaust gas are performed simultaneously, so the whole process is quite Four processes are completed in three strokes, so three cylinders can be used to share the same output shaft. The cycle of each gas discontinuation is shown in Table 2.

Run the program table two:

It can be seen from the program table that in each of the three strokes, one of the gas rainbows is the process of explosion and expansion. That is to say, every time the output shaft rotates once, a gas siphon explosion does work once.

This three-cylinder combination does not necessarily require three sets of wheel steppers, and two or three pairs of wheel stepper mechanisms are also acceptable.

Like the Han Scoop piston internal combustion engine, the output shaft of the engine must mesh with the inertia flywheel to prevent the output shaft from reversing and to obtain a more uniform output power.

FIG. 28 is a schematic perspective view of a control gas valve, wherein the gear 28 is an output shaft. The gear 27 meshing with the gear 28 is coaxial with the cams 25 and 26 and is sleeved on the piston shaft to form a concentric shaft with the piston. The setting is such that the cam 25 controls the opening and closing of the air valves 15, 16 and the cam 26 controls the opening and closing of the air valve 17.

The position of the gas valve 16 is determined according to the compression ratio and the volume expansion factor of the work gas designed by the designer.

Control of the intake air and fuel quantity should be achieved before entering the air valve 16.

If the piston scoop used in the above engine is to be made into a honeycomb to reduce weight, it is necessary to take the seal that does not affect it as a front part. The embodiment of the wheel-step rotary piston compressor and pump is further analyzed for the situation shown in Figures 1 to 6. If the gears 3 and 4 shown are respectively fitted with the single scoop pistons of Figures 5-1 and 5-2, It can be re-installed into the air rainbow of FIG. 6 to make the structure of the wheel-step rotary piston compressor and pump shown in FIG. 7.

The piston of Fig. 7 is locked when it is facing directly downwards, that is to say, the piston is pinned downwards in turn, so the two holes 5 and 6 are separated. The other piston plays the role of suction and exhaust during rotation. This is how compressors or pumps work.

In addition, if the stepper shown in FIG. 7 is controlled, the shafts of its gears 1 and 2 are used as output shafts, and it is meshed with the inertia flywheel, then high-pressure gas (or steam) is introduced into the air inlet 5 In order to make the piston rotate in a clockwise direction, the gears 3 and 4 coaxial with the piston drive the gears 1, 2 to rotate counterclockwise. This is the operating principle of the external combustion engine.

FIG. 9 is a schematic perspective view thereof. If the gears 9, 10 are respectively fitted with the double scoop pistons shown in Figure 10-1 and Figure 10-2, and then installed in a cylinder with two pairs of air holes, as shown in Figure 11, it becomes a double-inlet and double-outlet pump. Compressors, external combustion engines, especially Stirling heat engines. In addition, the relevant parts manufacturing requirements are briefly described as follows:

The piston and the gear can be made into one body, as shown in Figure 19-1 and Figure 20-1. The advantages are: When using appropriate materials and processes, a set of molds can be used to complete the piston and the die. Most processes in gear manufacturing.

Relevant requirements for the lock bolt of the stepper and the piston scoop: The center angle of the width of the piston scoop must not be greater than the center angle of the lock bolt width.

Essentials of making gear for wheel stepper:

For a semi-circular gear, take a gear equivalent to 2n teeth and cut out n teeth to form a semi-circular gear.

Gear with a lock bolt. It is equivalent to taking a gear with n + m + 1 teeth, and the position of the m teeth, including the tip of the teeth on both sides, is used as a lock bolt, and n-1 teeth can be multiplied. The number of m is preferably that the center angle of the pair of locking bolts is not less than 40 °. That is, the center angle of (m + 1) teeth is not small At 40 ^ο .

Gear with two lock bolts. Equivalent to a gear with 2 (n + m + 1) teeth. There are n + m + 1 teeth in two groups. According to the method described above, two tooth tips each occupying m teeth and including the teeth on both sides are made into lock bolts, and n-1 teeth on each side of the lock bolt, where m The number of centering angles of the bolts made is not less than 30. For example, the center angle of (m + 1) teeth is not less than 30 °.

If necessary, a check valve or a one-way bearing is installed on the shaft of the gears 31 and 32 to reduce the load of the lock bolt.

Claims

Claim

1. A wheel-step rotary piston engine, the engine working process controlled by a wheel stepper, the engine comprising a cylindrical gas iris, a rotary piston, a wheel stepper, an air intake hole, an exhaust hole, a spark plug or a spray Oil P and; wherein

The wheel stepper is constituted by two semicircular gears having a common axis and staggered with each other at a predetermined phase angle, respectively, and corresponding two gears each having a convex portion and meshing with the concentric shaft to form a circle A wheel stepper, the semicircular gear has an arc-shaped light edge without gear teeth, and in the continuous directional rotation of the semicircular gear shown, the outer edge of the lock bolt can be turned into the light edge and coincide with it and slide relatively So that the gear with the lock bolt cannot be rotated and temporarily locked by the light edge, and the gear with the lock bolt can not be unlocked until the outer edge of the lock bolt is turned out of the light edge and unlocked. Turning again; connected, the piston ^ engine cylinder is divided into a plurality of cavities, whereby the two semicircular gears ^ are thereby controlled by the wheel stepper, the two pistons are in the engine cylinder Rotate and stop in turn. The piston that has been stopped is temporarily locked and cannot be rotated. Until the lock is unlocked, the locked piston can rotate again, resulting in multiple positions between the piston and the inner surface of the gas rainbow. Cavity The volume changes periodically so that each of the cavities can realize the working process of intake, compression, combustion expansion and exhaust.

The engine according to claim 1, characterized in that the predetermined phase angle formed by the two semicircular gears of the wheel stepper alternately is 180 degrees.

3. The engine according to claim 1, wherein the gears coaxial with the piston in the wheel stepper can be formed integrally with the piston.

The engine according to claim 1, wherein two pairs of the gears in the wheel stepper are mounted on the same outer side of the engine cylinder.

The engine according to claim 1, wherein the two pairs of the gears in the wheel stepper can also be respectively mounted on both outer sides of the engine cylinder.

The engine according to claim 1, wherein the wheel stepper has a lock The two gears of the bolt each have two lock bolts, which constitute a half-circle stepper.

7. The engine according to claim 6, wherein the two gears with the bolts are respectively connected to corresponding two pairs of rotary pistons in the engine cylinder.

8. A wheel-step rotary piston compressor, the compressor working process controlled by a wheel stepper, wherein:

The wheel stepper is composed of two semicircular gears having a common shaft and interlaced with each other at a predetermined phase angle, and corresponding two gears each having a convex part and meshing with the concentric shaft. The semi-circular gear has an arc-shaped light edge without gear teeth. In the continuous directional rotation of the semi-circular gear shown, the outer edge of the lock bolt can be turned into the light edge and coincide with and slide relative to it, so that The gear with the lock bolt cannot be rotated and is temporarily locked by the light edge, and the gear with the lock bolt can not be rotated again until the outer edge of the lock bolt is turned out of the light edge and unlocked; The two gears with lock bolts are respectively connected to corresponding two rotary pistons in a compressor working cylinder, and the piston divides the working cylinder of the compressor having a circular cross-section into a plurality of chambers, and simultaneously The common shaft of the two semicircular gears is used as an input power shaft of the compressor;

Thereby, through the control of the wheel gear, the two pistons can be rotated and stopped in turn in the compressor working cylinder, and the pistons that have come to a stop are temporarily locked and cannot be rotated until the lock Only when the locked piston is unlocked can it be rotated again; thereby causing the volumes of the plurality of divided cavities in the working cylinder to change periodically, so that each of the cavities can achieve air intake, compression and Exhaust compressor working process.

9. The compressor according to claim 8, wherein the predetermined phase angle formed by the two semicircular gears of the wheel stepper mutually staggered is 180 degrees. 10.

10. The compressor according to claim 8, wherein the gears coaxial with the piston in the wheel stepper can be formed integrally with the piston.

11. The compressor according to claim 8, wherein two pairs of the gears in the wheel stepper are mounted on the same outer side of a working cylinder of the compressor.

12. The compressor according to claim 8, wherein the two pairs of the gears in the wheel stepper can also be respectively installed on both outer sides of the compressor cylinder.

13. The compressor according to claim 8, wherein the two gears of the wheel stepper with the lock bolts each have two lock bolts, which constitute a half-circle stepper.

14. The compressor according to claim 13, wherein the two gears with the lock bolts are respectively connected to corresponding two pairs of rotary pistons in the compressor working cylinder.

15. A wheel-step rotary piston pump, which works through a pump controlled by a wheel stepper, wherein:

The wheel stepper is composed of two semicircular gears having a common shaft and interlaced with each other at a predetermined phase angle, and corresponding two gears each having a convex part and meshing with the concentric shaft. The semi-circular gear has an isolated light edge without gear teeth. In the continuous directional rotation of the semi-circular gear shown, the outer edge of the lock bolt can be turned into the light edge and coincide with and slide relative to it, so that The gear with the lock bolt cannot be rotated and is temporarily locked by the light edge, and the gear with the lock bolt can not be rotated again until the outer edge of the lock bolt is turned out of the light edge and unlocked; Connected, the piston divides the pump working cylinder with a circular cross section into a plurality of working cavities, and simultaneously uses the common shaft of the two semicircular gears as the input power shaft of the pump;

With this, through the control of the wheel stepper, the two pistons can be rotated and stopped alternately in the pump working cylinder, and the pistons that have come to a stop are temporarily locked and cannot be rotated until the Only when the lock is unlocked, the locked piston can rotate again; thereby causing the volume of the plurality of divided working cavities in the working cylinder of the pump to change periodically, so that each of the working cavities can realize fluid suction. Medium, a pump working process that transfers energy to a fluid medium and drives the fluid medium to flow and discharge.

The pump according to claim 15, wherein the predetermined phase angle formed by the two semicircular gears of the wheel stepper alternately is 180 degrees.

17. The pump according to claim 15, wherein the gears coaxial with the piston in the wheel stepper can be formed integrally with the piston.

18. The pump according to claim 15, wherein two pairs of the gears in the wheel stepper are mounted on the same outer side of a working cylinder of the pump.

19. The pump according to claim 15, characterized in that the two pairs of the gears in the wheel stepper can also be respectively installed on both outer sides of the working rainbow of the pump.

20. The pump according to claim 15, wherein the two gears of the wheel stepper with the lock bolts each have two lock bolts, which constitute a half-circle stepper.

21. The pump according to claim 20, wherein the two gears with lock bolts are respectively connected to corresponding two pairs of rotary pistons in a pump working cylinder.