Elastic drive piston pump

Abstract

The 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 transmission shaft. The eccentric transmission shaft is disposed on the cylinder block, and both the first rotor and the second rotor are disposed on the eccentric transmission shaft. The first rod member is disposed on the first piston, and 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 move the first piston downward, the spring moves the second rod member and the second piston downward. When the second rotor rolls or slides on the second piston to move the second piston upward, the spring moves the first rod member and the first piston upward.

Description

Technical Field

[0001] The present invention relates to positive displacement pumps, engines and transmission mechanisms, and particularly relates to fields such as plunger pumps, vacuum pumps, compression pumps, air compressors, fans, liquid delivery pumps, gas turbines, internal combustion engines, turbines, metering pumps, linear transmission devices, etc.

Background Art

[0002] Positive displacement pumps mainly utilize the change of cavity volume to inhale and extrude fluids, and simultaneously complete the energy conversion process. For example, liquid turbines and gas turbine devices convert the kinetic energy and potential energy of fluids into mechanical energy. Existing crank-connecting rod piston type positive displacement pumps have the disadvantages of large volume, large vibration, poor stability, poor sealing effect and short service life because the piston directly exerts a lateral force on the cylinder, and are mainly used under low-speed and medium and small output operating conditions.

Summary of the Invention

[0003] The present invention reduces the volume and mass of the device, improves the efficiency of the device, reduces the number of parts of the device, reduces the processing difficulty and cost of the device, and is applicable to high, medium and low output and high, medium and low speed operating conditions, and has the advantages of high performance and high reliability. It eliminates the direct lateral force exerted by the piston on the cylinder, reduces the mass of the reciprocating parts, optimizes the transmission process, improves the transmission efficiency, effectively reduces the additional load on the moving parts, and reduces vibration and noise.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The 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 disposed on the cylinder block, and both the first rotor and the second rotor are disposed on the eccentric drive shaft. The first rod member is disposed on the first piston, and 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 is disposed on the second rod member or the second piston. When the first rotor rolls or slides on the first piston to move the first piston downward, the spring moves the second rod member and the second piston downward. When the second rotor rolls or slides on the second piston to move the second piston upward, the spring moves the first rod member and the first piston upward.

[0006] The 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 disposed on the cylinder block, and both the first rotor and the second rotor are disposed on the eccentric drive shaft. The first rod member is disposed on the first piston, and the second rod member is disposed on the second piston. The spring is disposed on the first rod member or the first piston and is also disposed on the second rod member or the second piston via a transmission belt. The first rod member and the second rod member slide within two sliding bearings respectively. When the first rotor rolls or slides on the first piston to move the first piston upward, the spring moves the second rod member and the second piston downward. When the second rotor rolls or slides on the second piston to move the second piston upward, the spring moves the first rod member and the first piston downward.

[0007] The elastic drive piston pump includes a cylinder block, a first piston, a first rotor, a spring, and an eccentric drive shaft. The number of eccentric drive shafts is two, which are arranged in parallel on the cylinder block. The number of first rotors is two, which are respectively arranged on the two eccentric drive shafts. The first rotor rolls or slides on the first piston. Transmission mechanisms such as gears and pulleys are arranged on the two eccentric drive shafts to synchronously rotate the two first rotors in the same or opposite directions. The two first rotors jointly move the first piston upward. Both 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 via the eccentric drive shaft. When the upward movement of the first piston ends, the spring moves the first piston downward. Under the action of the spring, the first piston always maintains a compression contact state with the first rotor.

[0008] The 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 eccentric drive shafts is two, which are arranged in parallel on the cylinder block. The number of first rotors is two, which are respectively arranged on the two eccentric drive shafts. The number of second rotors is two, which are respectively arranged on the two eccentric drive shafts. The first rotor and the second rotor respectively roll or slide on the first piston and the second piston. Transmission mechanisms such as gears and pulleys are arranged on the two eccentric drive shafts to synchronously rotate the two first rotors in the same or opposite directions and synchronously rotate the two second rotors in the same or opposite directions. Both 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 via wheels on the cylinder block. Under the action of the spring, the first piston always maintains a compression contact state with the first rotor, and the second piston always maintains a compression contact state with the second rotor.

[0009] The advantages of adopting the above technical solutions are as follows. By fixedly arranging a rod member on the piston and arranging a sliding bearing on the cylinder block, the rod member is restricted to reciprocate within the sliding bearing. Under the action of the spring, the working surfaces of the rotor and the piston always maintain a compressed contact state and drive each other. Thereby, the lateral pressure of the piston and the reverse impact between the piston and the rotor are eliminated. In particular, when two eccentric drive shafts are arranged and the two eccentric drive shafts are connected by a gear mechanism or a pulley mechanism, the two first rotors arranged on the eccentric drive 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 motion state without lateral force and torsional force. When a spring is arranged on the piston, the spring changes the motion direction of the piston and at the same time keeps the rotor and the piston in a compressed contact state all the time. Thereby, the vibration and noise of the device are greatly reduced, the sealing effect and service life of the sealing parts of the piston are greatly improved, and the friction loss is greatly reduced. In particular, when the spring is arranged between two pistons, the spring force basically does not change, and the expansion and contraction dimension of the spring basically does not change during the working process, the reliability of the spring is greatly improved, and the needs of various output operating conditions can be met. Compared with a piston pump with a crank-connecting rod structure, under the same operating conditions, the structure of the present invention reduces the number of parts, the volume and mass of the reciprocating moving parts, and the vibration and additional load due to inertia.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Best Mode for Carrying Out the Invention

[0011] A preferred embodiment of the elastic drive piston pump of the present invention will be described in detail below with reference to the drawings.

[0012] Please refer to FIGS. 1, 2 and 3. FIGS. 1, 2 and 3 disclose the 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 coaxially arranged on the eccentric drive shaft together. The first rod member and the second rod member are respectively arranged on the first piston and the second piston and slide inside the sliding bearings. Both 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 moves the first piston downward, the spring moves the second piston downward. When the second rotor rolls on the second piston and moves the second piston upward, the spring moves the first piston upward. In this embodiment, the first rotor and the second rotor are coaxially arranged. Components such as a cylinder sleeve and a valve are arranged on the cylinder block to form a double piston positive displacement pump.

[0013] Please refer to FIG. 3. The first piston and the second piston are arranged in parallel. Both ends of the spring are respectively arranged on the first piston and the second piston via a transmission belt. The transmission belt is arranged on the steering wheel and changes the direction of the acting force through the steering wheel. When the first rotor moves the first piston upward, the spring moves the second piston downward. When the second rotor moves the second piston upward, the spring moves the first piston downward.

[0014] Please refer to FIGS. 4, 5 and 6. FIGS. 4, 5 and 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 eccentric drive shafts is two and they are arranged in parallel on the cylinder block. The number of the first rotors is two and they are respectively arranged on the two eccentric drive shafts. The first rotor rolls on the piston. A gear transmission mechanism is arranged on the two eccentric drive shafts to synchronously rotate the two first rotors in opposite directions. The two first rotors jointly move the piston upward. Both 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 moves the first piston downward. Under the action of the spring, the first piston is in compression contact with the first rotor and keeps a state of mutual drive. During the movement process, the plane formed by the axes of the two first rotors is perpendicular to the axis of the first piston. Compared with the crank-connecting rod structure, the structure of the present invention avoids vibration and reverse impact caused by the interruption of force and the change of the direction of the acting force. The solution of this embodiment has the advantages of simple structure, few reciprocating parts, small mass, good sealing performance, long service life and high efficiency.

[0015] In the embodiment of FIG. 5, the springs are arranged at both ends of the piston via a transmission belt, forming a flexible elastic transmission component. The transmission belt also changes the direction of the acting force through the steering wheel. The spring moves the first piston downward, keeping the first piston and the first rotor in a constantly compressed contact state. The structure of this embodiment is simple, with small spring deformation and high reliability.

[0016] In the embodiment of FIG. 6, a curved surface track is arranged on the first piston. The first rotor rolls on the curved surface track, increasing 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 constant volume combustion time of the engine can be adjusted, and the torque output effect of the engine can be optimized.

[0017] Please refer to FIGS. 7 and 8. FIGS. 7 and 8 disclose an elastic drive piston pump in which a pair of pistons operate, which 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 eccentric drive shafts is two, which are arranged in parallel on the cylinder block. The number of first rotors is two, which are respectively arranged on the two eccentric drive shafts. The number of second rotors is two, which are respectively arranged on the two eccentric drive shafts. The first rotor and the second rotor roll on the first piston and the second piston respectively. Gears are arranged on the two eccentric drive 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 moves the first piston upward, the spring moves the second piston upward. When the second rotor moves the second piston downward, the spring moves the first piston downward.

[0018] In the embodiment of FIG. 8, the first piston and the second piston are arranged in parallel. Both ends of the spring are respectively arranged on the first piston and the second piston via transmission belts. The transmission belts are arranged on the steering wheel to change the direction of the acting force through the steering wheel. When the first rotor moves the first piston upward, the spring moves the second piston downward. When the second rotor moves the second piston upward, the spring moves the first piston downward.

[0019] Preferably, components such as a cylinder sleeve, a seal member, and a valve are arranged on the cylinder block to form a piston displacement pump.

[0020] Preferably, the spring is an elastic component such as a metal spring, a hydraulic spring, an electromagnetic spring, or an air spring.

[0021] Preferably, when the rotor 3 is a slider-type rotor, the transmission force can be increased.

[0022] Preferably, the present invention can input or output power with respect to liquids and gases, and can also be used as a linear reciprocating transmission mechanism.

[0023] Preferably, the rotor is a swing rotor, and the rotor can be composed of a bearing bush.

[0024] Preferably, the reciprocating swing angle of the swing rotor is less than 120 degrees.

[0025] Preferably, a spring force adjusting device is arranged on the spring.

[0026] Preferably, the sliding bearing is a movable component that performs linear reciprocating motion together with the drive shaft, the guide rod, and the rod member.

[0027] Preferably, when the rotor is a slider and the piston is in a planar orbit, the transmission force can be increased.

[0028] Preferably, the first rod member is slidably disposed on the second rod member.

[0029] Preferably, the number of elastic drive piston pumps is two, which are simultaneously disposed on the same eccentric drive shaft, their piston movement eccentric distances are the same, and the movement directions are opposite.

[0030] Preferably, the transmission belt is a flexible transmission component such as a rope, a wire, a steel belt, a synchronous belt, etc.

[0031] Preferably, according to different design requirements, the working phase difference between the first piston and the second piston can be an angle such as 60 degrees or 120 degrees. That is, within a certain time interval, the first piston and the second piston are in the upward or downward movement state at the same time, and the spring can alternately take two working states of extension and contraction.

[0032] Preferably, a sliding bearing is disposed on the cylinder block, and the first rod member or and the second rod member slide on the sliding bearing.

[0033] Preferably, a curved surface track is disposed on the first piston or and the second piston.

[0034] The above embodiments are only preferred embodiments for explaining 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 defined by the claims of the present invention.

Claims

1. An elastic drive piston pump, comprising a cylinder block (1), a spring (5), a first piston (21), a first rotor (31), a first rod member (41), a second piston (22), a second rotor (32), a second rod member (42), and an eccentric transmission shaft (7). The eccentric transmission shaft (7) is disposed on the cylinder block (1), the first rotor (31) and the second rotor (32) are both disposed on the eccentric transmission shaft (7), the first rod member (41) is disposed on the first piston (21), the second rod member (42) is disposed on the second piston (22), one end of the spring (5) is disposed on the first rod member (41) or the first piston (21), and the other end of the spring (5) is disposed on the second rod member (42) or the second piston (22). When the first rotor (31) rolls or slides on the first piston (21) to move the first piston (21) downward, the spring (5) moves the second rod member (42) and the second piston (22) downward. When the second rotor (32) rolls or slides on the second piston (22) to move the second piston (22) upward, the spring (5) moves the first rod member (41) and the first piston (21) upward.

2. In the elastic drive piston pump according to Claim 1, a sliding bearing (6) is disposed on the cylinder block (1), and the first rod member (41) or the second rod member (42) slides on the sliding bearing (6).

3. In the elastic drive piston pump according to Claim 1, the first rod member (41) is slidably disposed on the second rod member (42).

4. In the elastic drive piston pump according to Claim 1, a curved track is provided on the first piston (21) or the second piston (22).

5. An elastic drive piston pump, comprising a cylinder block (1), a spring (5), a first piston (21), a first rotor (31), a first rod member (41), a second piston (22), a second rotor (32), a second rod member (42), a sliding bearing (6), and an eccentric transmission shaft (7). The eccentric transmission shaft (7) is disposed on the cylinder block (1), both the first rotor (31) and the second rotor (32) are disposed on the eccentric transmission shaft (7), the first rod member (41) is disposed on the first piston (21), the second rod member (42) is disposed on the second piston (22), the spring (5) is disposed on the first rod member (41) or the first piston (21), and is also disposed on the second rod member (42) or the second piston (22) via a transmission belt. The first rod member (41) and the second rod member (42) slide within two sliding bearings (6) respectively. When the first rotor (31) rolls or slides on the first piston (21) to move the first piston (21) upward, the spring (5) moves the second rod member (42) and the second piston (22) downward. When the second rotor (32) rolls or slides on the second piston (22) to move the second piston (22) upward, the spring (5) moves the first rod member (41) and the first piston (21) downward.

6. In the elastic drive piston pump according to claim 5, a curved surface-shaped track is disposed on the first piston (21) or the second piston (22).

7. In the elastic drive piston pump according to claim 5, the number of elastic drive piston pumps is more than two.

8. An elastic drive piston pump, comprising a cylinder block (1), a first piston (21), a first rotor (31), a spring (5), and two eccentric transmission shafts (7) arranged in parallel on the cylinder block (1). Two first rotors (31) are respectively arranged on the two eccentric transmission shafts (7), and the first rotor (31) rolls or slides on the first piston (21). A transmission mechanism such as a gear or a pulley is provided on the two eccentric transmission shafts (7) to enable the two first rotors (31) to rotate in the same direction or in reverse synchronization. The two first rotors (31) jointly move the first piston (21) upward. Both ends of the spring (5) are respectively arranged on the first piston (21) and the cylinder block (1), or the spring (5) is arranged on a transmission belt (52), and the transmission belt (52) is arranged on the first piston (21) via the eccentric transmission shaft (7). When the upward movement of the first piston (21) is completed, the spring (5) moves the first piston (21) downward, and the first piston (21) always maintains a compression contact state with the first rotor (31) under the action of the spring (5).

9. In the elastic drive piston pump according to claim 8, the first rotor (31) is a swing rotor.

10. In the elastic drive piston pump according to claim 8, a curved track is provided on the first piston (21).

11. An elastic drive piston pump, comprising a cylinder block (1), a first piston (21), a second piston (22), a first rotor (31), a second rotor (32), a spring (5), and two eccentric transmission shafts (7) arranged in parallel on the cylinder block (1). Two first rotors (31) and two second rotors (32) are respectively arranged on the two eccentric transmission shafts (7), and the first rotor (31) and the second rotor (32) roll or slide on the first piston (21) and the second piston (22) respectively. A transmission mechanism such as a gear or a pulley is provided on the two eccentric transmission shafts (7) to make the two first rotors (31) rotate in the same direction or in reverse synchronization, and to make the two second rotors (32) rotate in the same direction or in reverse synchronization. Both ends of the 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), and the transmission belt (52) is arranged on the first piston (21) and the second piston (22) through a wheel (53) arranged on the cylinder block (1). The first piston (21) always maintains a compression contact state with the first rotor (31) under the action of the spring (5), and the second piston (22) always maintains a compression contact state with the second rotor (32) under the action of the spring (5).

12. In the elastic drive piston pump according to Claim 11, the first rotor (31) is a swinging rotor.

13. In the elastic drive piston pump according to Claim 11, curved tracks are provided on the first piston (21) and the second piston (22).

14. In the elastic drive piston pump according to Claim 11, the number of elastic drive piston pumps is more than two.

15. In the elastic drive piston pump according to Claim 11, a limiting plate is provided on the first piston (21), and the limiting plate and the first rotor (31) interact to prevent the rotation of the first piston (21).

Images