Elastically driven piston pump

Abstract

An elastically driven piston pump, comprising a cylinder block, a spring, a first piston, a first rotor, a first rod member, a second piston, a second rotor, a second rod member, and an eccentric transmission shaft. The eccentric transmission shaft is disposed on the cylinder block, the first rotor and the second rotor are both disposed on the eccentric transmission shaft, the first rod member is disposed on the first piston, the second rod member is disposed on the second piston, one end of the spring is disposed on the first rod member or the first piston, and the other end of the spring is disposed on the second rod member or the second piston. When the first rotor rolls or slides on the first piston to drive the first piston to move downwards, the spring drives the second rod member and the second piston to move downwards, and when the second rotor rolls or slides on the second piston to drive the second piston to move upwards, the spring drives the first rod member and the first piston to move upwards.

Description

Elastomeric drive piston pump Technical Field

[0001] The present invention relates to volumetric pumps, engines and transmission mechanisms, in particular to plunger pumps, vacuum pumps, compression pumps, air compressors, fans, delivery pumps, gas turbines, internal combustion engines, turbines, metering pumps and linear transmissions. Background Art

[0002] Positive displacement pumps primarily utilize changes in cavity volume to draw in and out fluids, simultaneously completing an energy conversion process. For example, a liquid or gas turbine converts the kinetic and potential energy of a fluid into mechanical energy. Existing crank-connecting rod piston positive displacement pumps suffer from drawbacks such as large size, high vibration, poor stability, and direct lateral force from the piston on the cylinder, resulting in poor sealing and lifespan. They are primarily used in low-speed, low- to medium-power applications.

[0003] Summary of the Invention

[0004] The present invention reduces the volume and mass of the device, improves the efficiency of the device, reduces the number of parts and components of the device, reduces the processing difficulty and cost of the device, is applicable to high, medium and low power and high, medium and low speed working conditions, has the advantages of high performance and high reliability, eliminates the direct lateral force of the piston on the cylinder, reduces the mass of the reciprocating parts, optimizes the transmission process and improves the transmission efficiency, effectively reduces the additional load of the moving parts, and reduces vibration and noise.

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

[0006] A spring-driven piston pump includes a cylinder body, a spring, a first piston, a first rotor, a first rod, a second piston, a second rotor, a second rod, and an eccentric transmission shaft. The eccentric transmission shaft is arranged on the cylinder body, the first rotor and the second rotor are both arranged on the eccentric transmission shaft, the first rod is arranged on the first piston, and the second rod is arranged on the second piston. One end of the spring is arranged on the first rod or the first piston, and the other end of the spring is arranged on the second rod or the second piston. When the first rotor rolls or slides on the first piston to drive the first piston downward, the spring drives the second rod and the second piston downward. When the second rotor rolls or slides on the second piston to drive the second piston upward, the spring drives the first rod and the first piston upward.

[0007] A spring-driven piston pump comprises a cylinder body, a spring, a first piston, a first rotor, a first rod, a second piston, a second rotor, a second rod, a sliding bearing, and an eccentric transmission shaft, wherein the eccentric transmission shaft is arranged on the cylinder body, the first rotor and the second rotor are both arranged on the eccentric transmission shaft, the first rod is arranged on the first piston, and the second rod is arranged on the second piston. The spring is arranged on the first rod or the first piston through a transmission belt and is also arranged on the second rod or the second piston. The first rod and the second rod slide in two sliding bearings respectively. When the first rotor rolls or slides on the first piston to drive the first piston to move upward, the spring drives the second rod and the second piston to move downward. When the second rotor rolls or slides on the second piston to drive the second piston to move upward, the spring drives the first rod and the first piston to move downward.

[0008] A spring-driven piston pump includes a cylinder body, a first piston, a first rotor, a spring, and an eccentric transmission shaft. The eccentric transmission shafts are two and are arranged in parallel on the cylinder body. The first rotors are two and are respectively arranged on the two eccentric transmission shafts. The first rotors roll or slide on the first pistons. Transmission mechanisms such as gears or pulleys are arranged on the two eccentric transmission shafts to make the two first rotors rotate synchronously in the same direction or in opposite directions. The two first rotors jointly drive the first piston to move upward. The two ends of the spring are respectively arranged on the first piston and the cylinder body, or the spring is arranged on the transmission belt, and the transmission belt is arranged on the first piston through the eccentric transmission shaft. When the first piston finishes its upward movement, the spring drives the first piston to move downward. Under the action of the spring, the first piston always maintains a pressurized contact state with the first rotor.

[0009] A spring-driven piston pump comprises a cylinder body, a first piston, a second piston, a first rotor, a second rotor, a spring, and an eccentric transmission shaft. The eccentric transmission shafts are two in number and are arranged in parallel on the cylinder body. The first rotors are two in number and are respectively arranged on the two eccentric transmission shafts. The second rotors are two in number and are respectively arranged on the two eccentric transmission shafts. The first rotor and the second rotor roll or slide on the first piston and the second piston respectively. A transmission mechanism such as gears or pulleys is arranged on the two eccentric transmission shafts to make the two first rotors rotate in the same direction or rotate synchronously in opposite directions, and the two second rotors rotate in the same direction or rotate synchronously in opposite directions. The two ends of the spring are respectively arranged on the first piston and the second piston, or the spring is arranged on the transmission belt, and the transmission belt is arranged on the first piston and the second piston through a wheel located on the cylinder body. Under the action of the spring, the first piston always maintains a pressurized contact state with the first rotor, and the second piston always maintains a pressurized contact state with the second rotor under the action of the spring.

[0010] The beneficial effects of the above technical solution are as follows: by fixing a rod on the piston and arranging a sliding bearing on the cylinder body, the rod is restricted to reciprocating motion in the sliding bearing, and under the action of the spring, the rotor and the working surface of the piston are always kept in pressurized contact and driven to each other, thereby eliminating the lateral pressure of the piston and the reversing impact of the piston and the rotor. In particular, two eccentric transmission shafts are provided, and the two eccentric transmission shafts are linked through a gear mechanism or a pulley mechanism, so that the two first rotors provided on the eccentric transmission shafts rotate in opposite directions or in the same direction. The driving force of the piston is located between a pair of rotors, and the piston is in a controlled dynamic motion state without lateral force and torsional force. The spring drives the piston to change the direction of movement while keeping the rotor and the piston in a state of pressurized contact, thereby greatly reducing the vibration and noise of the equipment, greatly improving the sealing effect of the piston and the life of the seal, and greatly reducing the friction loss. Especially when the spring is set between the two pistons, the spring force remains basically unchanged, and the expansion and contraction size of the spring does not change basically during the operation. The reliability of the spring is greatly improved to meet the requirements of various dynamic working conditions. Compared with the piston pump with a crank-connecting rod structure, under the same working conditions, the structure of the present invention reduces the number, volume and mass of the reciprocating components, and reduces the vibration and additional load caused by inertia. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a perspective schematic diagram of an elastically driven piston pump according to the present invention.

[0012] FIG2 is a schematic diagram of the combined structural form of the two embodiments of FIG1 .

[0013] FIG3 is another perspective schematic diagram of an elastically driven piston pump according to the present invention.

[0014] FIG4 is a second perspective schematic diagram of an elastically driven piston pump according to the present invention.

[0015] FIG. 5 is a schematic diagram of another body structure of the spring arrangement in the embodiment of FIG. 4 .

[0016] FIG6 is a schematic structural diagram of the piston of the embodiment of FIG4 provided with a curved surface.

[0017] FIG. 7 is a schematic diagram of a third structure of an elastically driven piston pump according to the present invention.

[0018] FIG8 is a fourth structural schematic diagram of an elastically driven piston pump according to the present invention.

[0019] The markings in the figure are: 1-cylinder body, 25-curved track, 4-rod, 5-spring, 52-transmission belt, 6-sliding bearing, 7-eccentric transmission shaft, 21-first piston, 31-first rotor, 41-first rod, 22-second piston, 32-second rotor, 42-second rod. DETAILED DESCRIPTION

[0020] The preferred embodiments of the elastically driven piston pump of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Please refer to Figures 1, 2 and 3. Figures 1, 2 and 3 reveal the elastically driven piston pump of the present invention, which includes a cylinder body, a spring, a first piston, a first rotor, a first rod, a second piston, a second rotor, a second rod and an eccentric transmission shaft, wherein the eccentric transmission shaft is arranged on the cylinder body, the first rotor and the second rotor have the same parameters and are coaxially arranged on the eccentric transmission shaft, the first rod and the second rod are respectively arranged on the first piston and the second piston and slide in the sliding bearing, the two ends of the spring are respectively arranged on the first rod and the second rod, when the first rotor rolls on the first piston and drives the first piston to move downward, the spring drives the second piston to move downward, when the second rotor rolls on the second piston and drives the second piston to move upward, the spring drives the first piston to move upward, in this embodiment, the first rotor and the second rotor are coaxially arranged, and cylinder sleeves, valves and other components are arranged on the cylinder body to form a double-piston positive displacement pump.

[0022] Please refer to Figure 3. The first piston and the second piston are arranged in parallel. The two ends of the spring are respectively arranged on the first piston and the second piston through a transmission belt. The transmission belt is set on the steering wheel and changes the direction of the force through the steering wheel. When the first rotor drives the first piston to move upward, the spring drives the second piston to move downward. When the second rotor drives the second piston to move upward, the spring drives the first piston to move downward.

[0023] Referring to Figures 4, 5 and 6, Figures 4, 5 and 6 illustrate another elastically driven piston pump of the present invention, comprising a cylinder body, a first piston, a first rotor, a spring, and an eccentric transmission shaft. The eccentric transmission shafts are two and arranged in parallel on the cylinder body. The first rotors are two and respectively arranged on the two eccentric transmission shafts. The first rotors roll on the pistons. A gear transmission mechanism is provided on the two eccentric transmission shafts to cause the two first rotors to rotate synchronously in opposite directions. The two first rotors jointly drive the piston upward. The ends of the spring are respectively provided on the first piston and the cylinder body. After the first piston completes its upward movement, the spring drives the first piston downward. Under the action of the spring, the first piston maintains a pressurized contact with the first rotor, driving each other. The plane formed by the axes of the two first rotors is perpendicular to the axis of the first piston during movement. Compared with a crank-connecting rod structure, the structure of the present invention avoids vibration and reversing shock caused by power interruption and change in force direction. The solution of this embodiment has the advantages of simple structure, fewer reciprocating components, low mass, good sealing performance, long service life, and high efficiency.

[0024] In the embodiment of Figure 5, the spring is connected to a transmission belt to form a flexible elastic transmission member arranged at both ends of the piston. The transmission belt also changes the direction of action through the steering wheel. The spring drives the first piston to move downward and keeps the first piston and the first rotor in pressurized contact at all times. The structure of this embodiment is simple, the deformation of the spring is small, and the reliability is high.

[0025] In the embodiment of FIG6 , a curved track is provided on the first piston. The rolling motion of the first rotor on the curved track can increase the force area between the rotor and the piston. The transmission effect can be changed by adjusting the curvature of the curved track. For example, when applied to an engine, the time during which the engine is in isochoric combustion can be adjusted, thereby optimizing the engine torque output effect.

[0026] Please refer to Figures 7 and 8. Figures 7 and 8 disclose an elastically driven piston pump with paired pistons, characterized in that it includes a cylinder body, a first piston, a second piston, a first rotor, a second rotor, a spring, and an eccentric transmission shaft. The number of the eccentric transmission shafts is 2 and they are arranged in parallel on the cylinder body. The number of the first rotors is 2 and they are respectively arranged on the 2 eccentric transmission shafts. The number of the second rotors is 2 and they are respectively arranged on the 2 eccentric transmission shafts. The first rotor and the second rotor roll on the first piston and the second piston respectively. Gears are arranged on the 2 eccentric transmission shafts. At this time, the two first rotors rotate in opposite directions, and the two second rotors rotate in opposite directions. The first piston and the second piston are arranged concentrically. The spring is arranged on the first piston and the second piston. When the first rotor drives the first piston to move upward, the spring drives the second piston to move upward. When the second rotor drives the second piston to move downward, the spring drives the first piston to move downward.

[0027] In the embodiment of Figure 8, the first piston and the second piston are arranged in parallel, and the two ends of the spring are respectively arranged on the first piston and the second piston through a transmission belt. The transmission belt is set on the steering wheel and changes the direction of the force through the steering wheel. When the first rotor drives the first piston to move upward, the spring drives the second piston to move downward. When the second rotor drives the second piston to move upward, the spring drives the first piston to move downward.

[0028] Preferably, a cylinder liner, a seal, a valve and other components are arranged on the cylinder body to form a piston positive displacement pump.

[0029] Preferably, the spring is an elastic component such as a metal spring, a hydraulic spring, an electromagnetic spring, or an air spring.

[0030] Preferably, when the rotor 3 is a slider-type rotor, the transmission force can be increased.

[0031] Preferably, the present invention can input or output power to liquids and gases, and can also serve as a linear reciprocating transmission mechanism.

[0032] Preferably, the rotor is a swing rotor, and the rotor may be composed of bearing bushes.

[0033] Preferably, the reciprocating swing angle of the swing rotor is less than 120 degrees.

[0034] Preferably, a spring force adjustment device is provided on the spring.

[0035] Preferably, the sliding bearing is a moving component that performs linear reciprocating motion with the transmission shaft, guide rod, and rod.

[0036] Preferably, when the rotor is a slider and the piston is a plane track, the transmission force can be increased.

[0037] Preferably, the first rod is slidably disposed on the second rod.

[0038] Preferably, the number of the elastically driven piston pumps is two and they are simultaneously arranged on the same eccentric transmission shaft, and the eccentric distances of their piston movements are the same and the movement directions are opposite.

[0039] Preferably, the transmission belt can be a flexible transmission component such as a rope, a steel wire, a steel belt, a synchronous belt, etc.

[0040] Preferably, according to different design requirements, the working phase difference between the first piston and the second piston can be 60 degrees, 120 degrees, etc., that is, the first piston and the second piston can be in upward or downward movement at the same time within a certain time interval, and the spring is alternately in the two working states of stretching and shortening.

[0041] Preferably, a sliding bearing is provided on the cylinder body, and the first rod or the second rod slides on the sliding bearing.

[0042] Preferably, a curved track is provided on the first piston or the second piston.

[0043] The above-described embodiments are merely descriptions of preferred implementations of the present invention. Various applications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An elastically driven piston pump, characterized in that: The invention comprises a cylinder body (1), a spring (5), a first piston (21), a first rotor (31), a first rod (41), a second piston (22), a second rotor (32), a second rod (42), and an eccentric transmission shaft (7), wherein the eccentric transmission shaft (7) is arranged on the cylinder body (1), the first rotor (31) and the second rotor (32) are both arranged on the eccentric transmission shaft (7), the first rod (41) is arranged on the first piston (21), the second rod (42) is arranged on the second piston (22), one end of the spring (5) is arranged on the first rod (41), and the second rod (42) is arranged on the second piston (22). 1) or the first piston (21), the other end of the spring (5) is arranged on the second rod (42) or the second piston (22), when the first rotor (31) rolls or slides on the first piston (21) to drive the first piston (21) to move downward, the spring (5) drives the second rod (42) and the second piston (22) to move downward, and when the second rotor (32) rolls or slides on the second piston (22) to drive the second piston (22) to move upward, the spring (5) drives the first rod (41) and the first piston (21) to move upward.

2. The elastically driven piston pump according to claim 1, characterized in that: A sliding bearing (6) is provided on the cylinder body (1), and the first rod (41) or the second rod (42) slides on the sliding bearing (6).

3. The elastically driven piston pump according to claim 1, characterized in that: The first rod (41) is slidably arranged on the second rod (42).

4. The elastically driven piston pump according to claim 1, characterized in that: The first piston (21) or the second piston (22) is provided with a curved track.

5. An elastically driven piston pump, characterized in that: The invention comprises a cylinder body (1), a spring (5), a first piston (21), a first rotor (31), a first rod (41), a second piston (22), a second rotor (32), a second rod (42), a sliding bearing (6), and an eccentric transmission shaft (7). The eccentric transmission shaft (7) is arranged on the cylinder body (1), the first rotor (31) and the second rotor (32) are both arranged on the eccentric transmission shaft (7), the first rod (41) is arranged on the first piston (21), and the second rod (42) is arranged on the second piston (22). The spring (5) is arranged on the first rod (41) or the first piston (21) and is also arranged on the second rod (42) or the second piston (22) through a transmission belt. The first rod (41) and the second rod (42) slide in two sliding bearings (6) respectively. The first rotor (31) When the first piston (21) rolls or slides on the first piston (21) to drive the first piston (21) to move upward, the spring (5) drives the second rod (42) and the second piston (22) to move downward. When the second rotor (32) rolls or slides on the second piston (22) to drive the second piston (22) to move upward, the spring (5) drives the first rod (41) and the first piston (21) to move downward.

6. The elastically driven piston pump according to claim 5, characterized in that: The first piston (21) or the second piston (22) is provided with a curved track.

7. The elastically driven piston pump according to claim 5, characterized in that: The number of the elastically driven piston pumps is greater than 2.

8. An elastically driven piston pump, characterized in that: The invention comprises a cylinder body (1), a first piston (21), a first rotor (31), a spring (5), and an eccentric transmission shaft (7). The number of the eccentric transmission shafts (7) is two and they are arranged in parallel on the cylinder body (1). The number of the first rotors (31) is two and they are respectively arranged on the two eccentric transmission shafts (7). The first rotors (31) roll or slide on the first piston (21). A transmission mechanism such as a gear or a pulley is arranged on the two eccentric transmission shafts (7) so that the two first rotors (31) rotate synchronously in the same direction or in opposite directions. The first rotor (31) and the first piston (21) are jointly driven to move upward. The two ends of the spring (5) are respectively arranged on the first piston (21) and the cylinder body (1), or the spring (5) is arranged on the transmission belt (52). The transmission belt (52) is arranged on the first piston (21) through the eccentric transmission shaft (7). When the first piston (21) finishes moving upward, the spring (5) drives the first piston (21) to move downward. Under the action of the spring (5), the first piston (21) always maintains a pressurized contact state with the first rotor (31).

9. The elastically driven piston pump according to claim 8, characterized in that: The first rotor (31) is a swing rotor.

10. The elastically driven piston pump according to claim 8, characterized in that: The first piston (21) is provided with a curved track.

11. An elastically driven piston pump, characterized in that: The invention comprises a cylinder body (1), a first piston (21), a second piston (22), a first rotor (31), a second rotor (32), a spring (5), and an eccentric transmission shaft (7). The number of the eccentric transmission shafts (7) is two and they are arranged in parallel on the cylinder body (1). The number of the first rotors (31) is two and they are respectively arranged on the two eccentric transmission shafts (7). The number of the second rotors (32) is two and they are respectively arranged on the two eccentric transmission shafts (7). The first rotor (31) and the second rotor (32) roll or slide on the first piston (21) and the second piston (22) respectively. Gears or pulleys are arranged on the two eccentric transmission shafts (7). The mechanism causes two first rotors (31) to rotate in the same direction or in opposite directions synchronously, and two second rotors (32) to rotate in the same direction or in opposite directions synchronously. The two ends of a spring (5) are respectively arranged on the first piston (21) and the second piston (22), or the spring (5) is arranged on a transmission belt (52). The transmission belt (52) is arranged on the first piston (21) and the second piston (22) through a wheel (53) located on the cylinder body (1). Under the action of the spring (5), the first piston (21) always maintains a pressurized contact state with the first rotor (31), and under the action of the spring (5), the second piston (22) always maintains a pressurized contact state with the second rotor (32).

12. The elastically driven piston pump according to claim 11, characterized in that: The first rotor (31) is a swing rotor.

13. The elastically driven piston pump according to claim 11, characterized in that: The first piston (21) and the second piston (22) are provided with curved tracks.

14. The elastically driven piston pump according to claim 11, characterized in that: The number of the elastically driven piston pumps is greater than 2.

15. The elastically driven piston pump according to claim 11, characterized in that: A limiting plate is provided on the first piston (21), and the limiting plate and the first rotor (31) interact with each other to prevent the first piston (21) from rotating.

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