Mechanical plunger pump

Abstract

The utility model provides a mechanical plunger pump, and belongs to the technical field of plunger pumps. According to the structure, the output end of a motor is connected with a driving belt wheel, the input end of a speed reducer is connected with a driven belt wheel, a belt is wound between the driven belt wheel and the driving belt wheel, the output end of the speed reducer is connected with a main shaft, the main shaft is connected with an eccentric wheel, the eccentric wheel is located in a ring body, and the outer side of the ring body is connected with a connecting rod. The connecting rod is rotationally connected with the support, the support is located on the plunger, and a plurality of sealing grooves are formed in the inner wall of the plunger. The eccentric wheel and the ring body structure which are nested with each other are designed, and the plunger is driven to do up-and-down reciprocating motion by utilizing the eccentric difference; under the driving of the motor, electric energy is directly converted into mechanical kinetic energy, so that the operation efficiency is improved, the failure rate is reduced, and the work is more stable and reliable. And meanwhile, a combined sealing structure of a plurality of sealing grooves is adopted, so that the sealing reliability is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plunger pumps, in particular to a mechanical plunger pump. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation. The plunger pump is widely used in high pressure, large flow and flow regulation occasions, such as hydraulic presses, engineering machinery and ships.

[0003] In the prior art, plunger pumps generally use hydraulic structures: two oil cylinders drive the plunger to move up and down, and the principle is that the electric energy of the motor is converted into hydraulic energy, and then into mechanical kinetic energy; this structure is inefficient and has many faults. In addition, conventional plunger pumps generally use traditional stuffing boxes and internal stuffing for sealing, and the reliability of this sealing structure is not ideal. Summary of the invention

[0004] The utility model aims to provide a mechanical plunger pump in view of the technical defects of the prior art, so as to solve the technical problems of low efficiency, frequent failures, unreliable sealing and the like of the conventional plunger pump.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0006] A mechanical plunger pump comprises a motor, a driving pulley, a speed reducer, a driven pulley, a belt, a main shaft, an eccentric wheel, a ring body, a connecting rod, a support, a plunger and a sealing groove, wherein a driving pulley is connected to the output end of the motor, a driven pulley is connected to the input end of the speed reducer, a belt is wound between the driven pulley and the driving pulley, a main shaft is connected to the output end of the speed reducer, an eccentric wheel is connected to the main shaft, the eccentric wheel is located inside the ring body, a connecting rod is connected to the outside of the ring body, the connecting rod is rotatably connected to the support, the support is located on the plunger, and a plurality of sealing grooves are provided on the inner wall of the plunger.

[0007] Preferably, two eccentric wheels are connected to the same main shaft, and the two eccentric wheels are respectively located inside the two ring bodies.

[0008] Preferably, the eccentric wheel includes two circular rings having different diameters, wherein the small ring is located inside the large ring and tangent to the large ring, the small ring and the large ring are fixed to each other at the tangent point, the small ring is sleeved on the outside of the main shaft and fixedly connected to the main shaft, and the small ring is coaxial with the main shaft.

[0009] Preferably, the number of the sealing grooves is 6.

[0010] Preferably, two of the sealing grooves are located at the upper part of the plunger, and the other four sealing grooves are located at the lower part of the plunger.

[0011] Preferably, the eccentric wheel is a cast eccentric wheel.

[0012] In the above technical scheme, the motor is used to drive the active pulley to rotate. Since the belt is wound between the active pulley and the driven pulley, the driven pulley can be driven to rotate through the belt transmission; the reducer is used to drive the main shaft to rotate and ensure a large torque; the eccentric wheel on the main shaft is driven by the main shaft to make an eccentric rotation movement. Since the eccentric wheel is located inside the ring body, this eccentric rotation movement will press the ring body to make it move in a circle. Since the connecting rod at the bottom of the ring body is rotatably connected to the support on the plunger, the transmission of the connecting rod and the support makes the plunger form a reciprocating up and down movement to realize the driving of the plunger. The multiple sealing grooves on the inner side of the plunger are used to enhance the sealing effect.

[0013] The utility model provides a mechanical plunger pump. The technical solution designs mutually nested eccentric wheels and ring structures, and utilizes the eccentric difference to drive the plunger to reciprocate up and down; under the drive of the motor, the electrical energy is directly converted into mechanical kinetic energy. This structure improves the operating efficiency, reduces the failure rate, and makes the work more stable and reliable. At the same time, the utility model adopts a combined sealing structure of multiple sealing grooves, which effectively improves the reliability of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model as a whole;

[0015] Figure 2 It is a three-dimensional diagram of a part of the utility model;

[0016] Figure 3 It is a three-dimensional diagram of a part of the plunger in the utility model;

[0017] Figure 4 It is a three-dimensional diagram of a part of the plunger in a cut-away state in the utility model;

[0018] In the figure:

[0019] 1. Motor 2. Driving pulley 3. Speed ​​reducer 4. Driven pulley

[0020] 5. Belt 6. Main shaft 7. Eccentric wheel 8. Ring body

[0021] 9. Connecting rod 10. Support 11. Plunger 12. Sealing groove. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention will be described in detail below. In order to avoid too many unnecessary details, the well-known structures or functions will not be described in detail in the following examples. The approximate language used in the following examples can be used for quantitative expression, indicating that the quantity can be allowed to change without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following examples have the same meanings as those generally understood by technicians in the field to which the present invention belongs.

[0023] Example 1

[0024] Mechanical piston pumps, such as Figure 1 to Figure 4 As shown, it includes a motor 1, a driving pulley 2, a reducer 3, a driven pulley 4, a belt 5, a main shaft 6, an eccentric wheel 7, a ring body 8, a connecting rod 9, a support 10, a plunger 11, and a sealing groove 12, wherein the driving pulley 2 is connected to the output end of the motor 1, the driven pulley 4 is connected to the input end of the reducer 3, a belt 5 is wound between the driven pulley 4 and the driving pulley 2, the main shaft 6 is connected to the output end of the reducer 3, the eccentric wheel 7 is connected to the main shaft 6, the eccentric wheel 7 is located inside the ring body 8, a connecting rod 9 is connected to the outside of the ring body 8, the connecting rod 9 is rotatably connected to the support 10, the support 10 is located on the plunger 11, and a plurality of sealing grooves 12 are provided on the inner wall of the plunger 11.

[0025] Among them: the motor 1 is used to drive the active pulley 2 to rotate. Since the belt 5 is wound between the active pulley 2 and the driven pulley 4, the driven pulley 4 can be driven to rotate through the belt 5; the reducer 3 is used to drive the main shaft 6 to rotate and ensure a large torque; the eccentric wheel 7 located on the main shaft 6 is driven by the main shaft 6 to make an eccentric rotational motion. Since the eccentric wheel 7 is located inside the ring body 8, this eccentric rotational motion will press the ring body 8 to make it do a circular motion. Since the connecting rod 9 at the bottom of the ring body 8 is rotatably connected with the support 10 on the plunger 11, the transmission of the connecting rod 9 and the support 10 makes the plunger 11 form a reciprocating up and down motion, thereby driving the plunger 11. The multiple sealing grooves 12 on the inner side of the plunger 11 are used to enhance the sealing effect.

[0026] Example 2

[0027] Mechanical piston pumps, such as Figure 1 to Figure 4As shown, it includes a motor 1, a driving pulley 2, a speed reducer 3, a driven pulley 4, a belt 5, a main shaft 6, an eccentric wheel 7, a ring body 8, a connecting rod 9, a support 10, a plunger 11, and a sealing groove 12, wherein the driving pulley 2 is connected to the output end of the motor 1, the driven pulley 4 is connected to the input end of the speed reducer 3, a belt 5 is wound between the driven pulley 4 and the driving pulley 2, the main shaft 6 is connected to the output end of the speed reducer 3, an eccentric wheel 7 is connected to the main shaft 6, the eccentric wheel 7 is located inside the ring body 8, a connecting rod 9 is connected to the outside of the ring body 8, the connecting rod 9 is rotatably connected to the support 10, the support 10 is located on the plunger 11, and a plurality of sealing grooves 12 are provided on the inner wall of the plunger 11. Among them, two eccentric wheels 7 are connected to the same main shaft 6, and the two eccentric wheels 7 are respectively located inside the two ring bodies 8. The eccentric wheel 7 includes two circular rings with different diameters, wherein the small circular ring is located inside the large circular ring and is tangent to the large circular ring, the small circular ring and the large circular ring are mutually fixed at the tangent point, the small circular ring is sleeved on the outside of the main shaft 6 and is fixedly connected to the main shaft 6, and the small circular ring is coaxial with the main shaft 6. There are 6 sealing grooves 12, 2 of which are located on the upper part of the plunger 11, and the other 4 sealing grooves 12 are located on the lower part of the plunger 11. The eccentric wheel 7 is a cast eccentric wheel.

[0028] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of application of the present invention shall be included in the protection scope of the present invention.

Claims

1. Mechanical plunger pump, characterized in that: The invention comprises a motor (1), a driving pulley (2), a speed reducer (3), a driven pulley (4), a belt (5), a main shaft (6), an eccentric wheel (7), a ring body (8), a connecting rod (9), a support (10), a plunger (11), and a sealing groove (12), wherein the output end of the motor (1) is connected to the driving pulley (2), the input end of the speed reducer (3) is connected to the driven pulley (4), and the driven pulley (4) and the driving pulley (2) are connected to each other. A belt (5) is wound around the pulleys (2), a main shaft (6) is connected to the output end of the reducer (3), an eccentric wheel (7) is connected to the main shaft (6), the eccentric wheel (7) is located inside a ring body (8), a connecting rod (9) is connected to the outside of the ring body (8), the connecting rod (9) is rotatably connected to a support (10), the support (10) is located on a plunger (11), and a plurality of sealing grooves (12) are provided on the inner wall of the plunger (11).

2. The mechanical plunger pump according to claim 1, characterized in that: Two eccentric wheels (7) are connected to the same main shaft (6), and the two eccentric wheels (7) are respectively located inside two ring bodies (8).

3. The mechanical plunger pump according to claim 1, characterized in that: The eccentric wheel (7) comprises two circular rings, the two circular rings have different diameters, wherein the small circular ring is located inside the large circular ring and is tangent to the large circular ring, the small circular ring and the large circular ring are mutually fixed at the tangent point, the small circular ring is sleeved on the outside of the main shaft (6) and is fixedly connected to the main shaft (6), and the small circular ring is coaxial with the main shaft (6).

4. The mechanical plunger pump according to claim 1, characterized in that: The number of the sealing grooves (12) is 6.

5. The mechanical plunger pump according to claim 4, characterized in that: Two sealing grooves (12) are located at the upper part of the plunger (11), and the other four sealing grooves (12) are located at the lower part of the plunger (11).

6. The mechanical plunger pump according to claim 1, characterized in that: The eccentric wheel (7) is a cast eccentric wheel.

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