ELASTICALLY DRIVEN PISTON PUMP

An elastically driven piston pump, including 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. 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.

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Description
TECHNICAL FIELD

The present invention relates to positive displacement 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, linear transmissions and other fields.

BACKGROUND ART

Positive displacement pumps mainly utilize the change of the cavity volume to suck in and squeeze out fluids, and simultaneously complete the energy conversion process. For example, liquid turbine or gas turbine devices convert the kinetic energy and potential energy of fluids into mechanical energy. The existing crank-connecting rod piston positive displacement pump has the disadvantages of large volume, large vibration, poor stability, and poor sealing effect and service life due to the direct lateral force of the piston on the cylinder, and is mostly used in low-speed and medium and small power working conditions.

SUMMARY OF THE INVENTION

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, can be applied 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 moving parts, optimizes the transmission process and improves the transmission efficiency, effectively reduces the additional load of the moving parts, and reduces vibration and noise.

To achieve the above purpose, the present invention provides the following technical solutions:

An elastic drive piston pump includes 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 drive shaft. The eccentric drive shaft is arranged on the cylinder block, the first rotor and the second rotor are both arranged on the eccentric drive shaft, the first rod member is arranged on the first piston, the second rod member is arranged on the second piston, one end of the spring is arranged on the first rod member or the first piston, and the other end of the spring is arranged 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 downward, the spring drives the second rod member 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 member and the first piston to move upward.

An elastic drive piston pump includes 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, a sliding bearing, and an eccentric drive shaft. The eccentric drive shaft is arranged on the cylinder block, the first rotor and the second rotor are both arranged on the eccentric drive shaft, the first rod member is arranged on the first piston, the second rod member is arranged on the second piston, the spring is arranged on the first rod member or the first piston and also on the second rod member or the second piston through a transmission belt. The first rod member and the second rod member respectively slide in two sliding bearings. 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 member 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 member and the first piston to move downward.

An elastic drive piston pump includes a cylinder block, a first piston, a first rotor, a spring, and an eccentric drive shaft. The number of the eccentric drive shafts is 2 and they are arranged in parallel on the cylinder block. The number of the first rotors is 2 and they are respectively arranged on the 2 eccentric drive shafts. The first rotor rolls or slides on the first piston. A transmission mechanism such as a gear or a pulley is arranged on the 2 eccentric drive shafts to make the 2 first rotors rotate in the same direction or reversely and synchronously. The 2 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 block, or the spring is arranged on a transmission belt, and the transmission belt is arranged on the first piston through the eccentric drive shaft. When the upward movement of the first piston ends, the spring drives the first piston to move downward. The first piston always remains in a compressed contact state with the first rotor under the action of the spring.

An elastic drive piston pump includes a cylinder block, a first piston, a second piston, a first rotor, a second rotor, a spring, and an eccentric drive shaft. The number of the eccentric drive shafts is 2 and they are arranged in parallel on the cylinder block. The number of the first rotors is 2 and they are respectively arranged on the 2 eccentric drive shafts. The number of the second rotors is 2 and they are respectively arranged on the 2 eccentric drive shafts. The first rotor and the second rotor respectively roll or slide on the first piston and the second piston. A transmission mechanism such as a gear or a pulley is arranged on the 2 eccentric drive shafts to make the 2 first rotors rotate in the same direction or reversely and synchronously, and the 2 second rotors rotate in the same direction or reversely and synchronously. The two ends of the spring are respectively arranged on the first piston and the second piston, or the spring is arranged on a transmission belt, and the transmission belt is arranged on the first piston and the second piston through a wheel located on the cylinder block. The first piston always remains in a compressed contact state with the first rotor under the action of the spring, and the second piston always remains in a compressed with the second rotor under the action of the spring.

The beneficial effects of adopting the above technical solutions are: by fixedly arranging rod members on the piston and arranging sliding bearings on the cylinder block, the rod members are restricted to reciprocate in the sliding bearings. Under the action of the spring, the working surfaces of the rotor and the piston always remain in a compressed contact state and drive each other, eliminating the lateral pressure of the piston and the reversing impact of the piston and the rotor. Especially when 2 eccentric drive shafts are arranged and the 2 eccentric drive shafts are linked through a gear mechanism or a pulley mechanism, the 2 first rotors arranged on the eccentric drive shafts rotate reversely 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 movement state without lateral force and torsional force. A spring is arranged on the piston. The spring drives the piston to change the movement direction and at the same time keeps the rotor and the piston always in a compressed contact state. Thus, the vibration and noise of the equipment are greatly reduced, the sealing effect and the service life of the sealing element of the piston are greatly improved, and the friction loss is greatly reduced. Especially when the spring is arranged between the two pistons, the spring force basically remains unchanged, the expansion and contraction size of the spring basically does not change during the working process, and the reliability of the spring is greatly improved, which can meet the needs of various power 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 of parts, volume and mass of the reciprocating parts and components, and reduces the vibration and additional load caused by inertia.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional schematic diagram of an elastic drive piston pump of the present invention.

FIG. 2 is a schematic diagram of the combined structure form of 2 embodiments in FIG. 1.

FIG. 3 is another three-dimensional schematic diagram of an elastic drive piston pump of the present invention.

FIG. 4 is a second three-dimensional schematic diagram of an elastic drive piston pump of the present invention.

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

FIG. 6 is a schematic diagram of the structure in which the piston in the embodiment in FIG. 4 is provided with a curved surface.

FIG. 7 is a third structural schematic diagram of an elastic drive piston pump of the present invention.

FIG. 8 is a fourth structural schematic diagram of an elastic drive piston pump of the present invention.

The marks in the figures are: 1—cylinder block, 25—curved surface track, 4—rod member, 5—spring, 52 transmission belt, 6—sliding bearing, 7—eccentric drive shaft, 21—first piston, 31 first rotor, 41—first rod member, 22—second piston, 32—second rotor, 42—second rod member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The preferred embodiments of the elastic drive piston pump of the present invention are described in detail below in combination with the drawings.

Please refer to FIG. 1, FIG. 2 and FIG. 3. FIG. 1, FIG. 2 and FIG. 3 disclose an elastic drive piston pump of the present invention, which includes 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 drive shaft. The eccentric drive shaft is arranged on the cylinder block. The first rotor and the second rotor have the same parameters and are both coaxially arranged on the eccentric drive shaft. The first rod member and the second rod member 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 member and the second rod member. 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. Cylinder sleeves, valves and other components are arranged on the cylinder block to form a double-piston positive displacement pump.

Please refer to FIG. 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 arranged on a steering wheel and changes the direction of the acting 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.

Please refer to FIG. 4, FIG. 5 and FIG. 6. FIG. 4, FIG. 5 and FIG. 6 disclose another elastic drive piston pump of the present invention, which includes a cylinder block, a first piston, a first rotor, a spring, and an eccentric drive shaft. The number of the eccentric drive shafts is 2 and they are arranged in parallel on the cylinder block. The number of the first rotors is 2 and they are respectively arranged on the 2 eccentric drive shafts. The first rotor rolls on the piston. A gear transmission mechanism is arranged on the 2 eccentric drive shafts to make the 2 first rotors rotate reversely and synchronously. The 2 first rotors jointly drive the piston to move upward. The two ends of the spring are respectively arranged on the first piston and the cylinder block. When the upward movement of the first piston ends, the spring drives the first piston to move downward. The first piston remains in a compressed contact and mutually driving state with the first rotor under the action of the spring. The plane formed by the axes of the two first rotors is perpendicular to the axis of the first piston during the movement process. Compared with the crank-connecting rod structure, the structure of the present invention avoids the vibration and reversing impact caused by the interruption of power and the change of the direction of the acting force. The solution of this embodiment has the advantages of simple structure, few reciprocating moving parts, small mass, good sealing performance, long service life and high efficiency.

In the embodiment in FIG. 5, the spring is arranged at both ends of the piston through a transmission belt to form a flexible elastic transmission component. The transmission belt also changes the direction of the acting force through a steering wheel. The spring drives the first piston to move downward and keeps the first piston and the first rotor always in a compressed contact state. The structure of this embodiment is simple, and the deformation of the spring is small and the reliability is high.

In the embodiment in FIG. 6, a curved surface track is arranged on the first piston. The first rotor rolls on the curved surface track to increase the acting area between the rotor and the piston. By adjusting the curved surface of the curved surface track, the transmission effect can be changed. For example, when applied to an engine, the time of constant volume combustion of the engine can be adjusted, and the torque output effect of the engine can be optimized.

Please refer to FIG. 7 and FIG. 8. FIG. 7 and FIG. 8 disclose an elastic drive piston pump with paired pistons working, which is characterized in that it includes a cylinder block, a first piston, a second piston, a first rotor, a second rotor, a spring, and an eccentric drive shaft. The number of the eccentric drive shafts is 2 and they are arranged in parallel on the cylinder block. The number of the first rotors is 2 and they are respectively arranged on the 2 eccentric drive shafts. The number of the second rotors is 2 and they are respectively arranged on the 2 eccentric drive shafts. The first rotor and the second rotor respectively roll on the first piston and the second piston. Gears are arranged on the 2 eccentric drive shafts. At this time, the 2 first rotors rotate reversely, and the 2 second rotors rotate reversely. The first piston and the second piston are concentrically arranged. 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.

In the embodiment in FIG. 8, 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 arranged on a steering wheel and changes the direction of the acting 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.

Preferably, cylinder sleeves, sealing elements, valves and other components are arranged on the cylinder block to form a piston positive displacement pump.

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

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

Preferably, the present invention can input or output power to liquids and gases, and can also be used as a linear reciprocating transmission mechanism.

Preferably, the rotor is a swinging rotor, and the rotor can be composed of a bearing bush.

Preferably, the reciprocating swing angle of the swinging rotor is less than 120 degrees.

Preferably, a spring force adjusting device is arranged on the spring.

Preferably, the sliding bearing is a moving component that makes linear reciprocating movements with the drive shaft, the guide rod, and the rod member.

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

Preferably, the first rod member is slidably arranged on the second rod member.

Preferably, the number of the elastic drive piston pumps is 2 and they are simultaneously arranged on the same eccentric drive shaft, and their piston movement eccentric distances are the same and the movement directions are opposite.

Preferably, the transmission belt can be a flexible transmission component such as a rope, a steel wire, a steel belt, or a synchronous belt.

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

Preferably, a sliding bearing is arranged on the cylinder block, and the first rod member or and the second rod member slide on the sliding bearing.

Preferably, a curved surface track is arranged on the first piston or and the second piston.

The above-described embodiments are only preferred embodiments for describing the present invention. Various applications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. 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, wherein:

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; and
when the first rotor rolls or slides on the first piston to drive the first piston to move downward, the spring drives the second rod member and the second piston to move downward, and 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 member and the first piston to move upward.

2. The elastically driven piston pump according to claim 1, a sliding bearing is arranged on the cylinder block, and the first rod member or and the second rod member slide on the sliding bearing.

3. The elastically driven piston pump according to claim 1, the first rod member is slidably arranged on the second rod member.

4. The elastically driven piston pump according to claim 1, a curved track is provided on the first piston or and the second piston.

5. 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, a sliding bearing, and an eccentric transmission shaft, wherein:

the eccentric transmission shaft is arranged on the cylinder block, the first rotor and the second rotor are both arranged on the eccentric transmission shaft, the first rod member is arranged on the first piston, the second rod member is arranged on the second piston, the spring is arranged on the first rod member or the first piston and also on the second rod member or the second piston through a transmission belt;
the first rod member and the second rod member respectively slide in two sliding bearings;
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 member and the second piston to move downward; and
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 member and the first piston to move downward.

6. The elastically driven piston pump according to claim 5, a curved surface track is arranged on the first piston or and the second piston.

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

8. An elastically driven piston pump, comprising a cylinder block, a first piston-, a first rotor, a spring, and two eccentric transmission shafts which are parallelly disposed on the cylinder block, wherein:

two first rotors are respectively disposed on the two eccentric transmission shafts, and the first rotors roll or slide on the first piston;
a transmission mechanism such as gears or pulleys is provided on the two eccentric transmission shafts to make the two first rotors rotate in the same direction or in reverse synchronization;
the two first rotors jointly drive the first piston to move upward;
the two ends of the spring are respectively disposed on the first piston and the cylinder block, or the spring is disposed on a transmission belt and the transmission belt is disposed on the first piston through the eccentric transmission shaft and
when the upward movement of the first piston is completed, the spring drives the first piston to move downward, and the first piston always maintains a compressed contact state with the first rotor under the action of the spring.

9. The elastically driven piston pump according to claim 8, the first rotor is a swinging rotor.

10. The elastically driven piston pump according to claim 8, a curved track is provided on the first piston.

11. An elastically driven piston pump, comprising a cylinder block, a first piston, a second piston, a first rotor, a second rotor, a spring, and two eccentric transmission shafts which are parallelly disposed on the cylinder block, wherein:

there are two first rotors respectively disposed on the two eccentric transmission shafts, and two second rotors respectively disposed on the two eccentric transmission shafts;
the first rotors and the second rotors respectively roll or slide on the first piston and the second piston;
a transmission mechanism such as gears or pulleys is provided on the two eccentric transmission shafts to make the two first rotors rotate in the same direction or in reverse synchronization, and the two second rotors rotate in the same direction or in reverse synchronization;
the two ends of the spring are respectively disposed on the first piston and the second piston, or the spring is disposed on a transmission belt, and the transmission belt is disposed on the first piston and the second piston through wheels located on the cylinder block; and
the first piston always maintains a compressed contact state with the first rotor under the action of the spring, and the second piston always maintains a compressed contact state with the second rotor under the action of the spring.

12. The elastically driven piston pump according to claim 11, the first rotor is a swinging rotor.

13. The elastically driven piston pump according to claim 11, a curved tracks are provided on the first piston and the second piston.

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

15. The elastically driven piston pump according to claim 11, a limiting plate is provided on the first piston, and the limiting plate and the first rotor interact to prevent the first piston from rotating.

Patent History
Publication number: 20260258794
Type: Application
Filed: Jun 28, 2023
Publication Date: Sep 3, 2026
Inventor: Bin TANG (Zibo)
Application Number: 18/879,589
Classifications
International Classification: F04B 9/06 (20060101); F04B 9/04 (20060101);