Spline shaft plunger pump

Abstract

The utility model relates to the technical field of plunger pump especially is a spline shaft plunger pump, including the pump body, the inside of pump body is provided with the inner chamber and a plurality of plunger chamber with inner chamber intercommunication, the both sides of pump body are provided with the convex part and the convex end respectively, be provided with the key shaft subassembly between the convex part and the convex end, the outside of key shaft subassembly is butt joined with the collar, and the outside surface of collar rotates and is equipped with the connecting piece, and the end of connecting piece cooperations has the plunger piece, the utility model discloses through the collaborative design of double spline shaft and gear transmission subassembly, the power transmission efficiency and structural stability are optimized significantly. Double spline shaft adopts the multiple teeth meshing structure, can effectively disperse stress, avoids the stress concentration problem of traditional single key connection, improves the reliability of torque transmission, and gear transmission subassembly realizes the stable transmission and speed regulation of power through the meshing cooperation between the gear, adapts high pressure, high speed condition, reduces the failure risk due to the connection failure.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically a splined shaft plunger pump. Background Technology

[0002] In existing technologies, the connection between the drive shaft and the power input end and the actuator of the plunger pump is mostly made using non-splined shaft structures such as single key, rigid pin connection or flange bolt connection, which have significant performance defects: its torque transmission depends on a single contact point, the contact area is limited and the force is concentrated. Under high pressure and high speed conditions, stress concentration can easily lead to key deformation, shear failure or slippage, resulting in power loss and pressure fluctuation. At the same time, the clearance fit of the non-spline structure leads to low centering accuracy, which can easily generate eccentric vibration during high-speed rotation, aggravate the end face wear of the cylinder block and the distributor plate, the failure of the fit between the plunger and the cylinder bore and shorten the bearing life, seriously affecting the volumetric efficiency and operational stability of the pump.

[0003] Therefore, a splined shaft plunger pump is needed to improve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a splined shaft plunger pump to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A splined shaft plunger pump includes a pump body, an inner cavity and several plunger cavities communicating with the inner cavity, a protrusion and a protruding end on both sides of the pump body, a key shaft assembly between the protrusion and the protruding end, a collar abutting the outer side of the key shaft assembly, and a connecting member rotatably sleeved on the outer side of the collar, a plunger component engaging at the end of the connecting member, and the plunger component being limited and positioned inside the plunger cavity.

[0006] As a preferred embodiment of the present invention, the key shaft assembly includes a spline shaft a and a spline shaft b, the spline shaft b being disposed through the convex part and the convex end, a transmission assembly being disposed between the spline shaft a and the spline shaft b, and a gear c being disposed on the outer side of the spline shaft b, the gear c meshing with the inner side of the collar.

[0007] As a preferred embodiment of this utility model, the transmission assembly includes gear a and gear b, with gear a being positioned on the outside of spline shaft a and gear b being positioned on the outside of spline shaft b.

[0008] As a preferred embodiment of this utility model, the front end of the pump body is provided with a docking end, and the upper and lower ends of the docking end are respectively connected to the water outlet end and the water inlet end. The water inlet end, the water outlet end and the docking end are fixedly connected by a bolt group.

[0009] As a preferred embodiment of this utility model, the side of the water inlet end is provided with a water inlet connection end, and the back of the water outlet end is provided with a plurality of water outlet connection ends, and each water outlet connection end is equipped with a control valve.

[0010] As a preferred embodiment of this utility model, an air chamber is connected to the upper middle part of the water outlet, a pressure gauge is provided on one side of the air chamber, and a regulating valve is installed on the other side of the air chamber. A return water end is provided on the lower side of the regulating valve.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention significantly optimizes power transmission efficiency and structural stability through the synergistic design of a double-splined shaft and a gear transmission assembly. The double-splined shaft employs a multi-tooth meshing structure, which effectively disperses stress, avoids the stress concentration problem of traditional single-key connections, and improves the reliability of torque transmission. The gear transmission assembly achieves stable power transmission and speed regulation through the meshing of gears, adapting to high-pressure and high-speed operating conditions and reducing the risk of failure due to connection failure. Attached Figure Description

[0012] Figure 1 This is a first-view perspective perspective view of the present invention; Figure 2 This is a second-view perspective perspective view of the present invention; Figure 3 This is a cross-sectional view of the present invention.

[0013] In the diagram: 1. Pump body; 2. Fixing base; 3. Rear end cover; 4. Protrusion; 5. Splined shaft b; 6. Splined shaft a; 7. Inlet end; 8. Outlet end; 9. Outlet connecting end; 10. Inlet connecting end; 11. Plunger; 12. Gear a; 13. Gear b; 14. Gear c; 15. Connecting part; 16. Collar; 17. Protrusion. Detailed Implementation

[0014] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0015] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0016] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] Please see Figure 1-3 This utility model provides a technical solution: For an example, please refer to... Figure 1 , 2 3. A splined shaft plunger pump includes a pump body 1. The pump body 1 has an inner cavity and several plunger cavities communicating with the inner cavity. The pump body 1 has a protrusion 4 and a protruding end 18 on both sides. A key shaft assembly is provided between the protrusion 4 and the protruding end 18. A collar 17 is connected to the outer side of the key shaft assembly. A connecting member 16 is rotatably sleeved on the outer side of the collar 17. A plunger member 12 is connected to the end of the connecting member 16. The plunger member 12 is limited and disposed inside the plunger cavity.

[0019] Please refer to Figure 1 , 2 3. The key shaft assembly includes a spline shaft a6 and a spline shaft b5. The spline shaft b5 is disposed between the protrusion 4 and the protrusion 18. A transmission assembly is disposed between the spline shaft a6 and the spline shaft b5. A gear c15 is disposed on the outside of the spline shaft b5. The gear c15 meshes with the inside of the collar 17. The transmission assembly includes a gear a13 and a gear b14. The gear a13 is positioned on the outside of the spline shaft a6, and the gear b14 is positioned on the outside of the spline shaft b5.

[0020] An external power source is connected via a splined shaft a6, which transmits torque to a gear a13 positioned on its outer side. Gear a13 meshes with gear b14 on the outer side of splined shaft b5, forming a speed-reduction or speed-increasing transmission, driving splined shaft b5 to rotate synchronously. The double splined shaft disperses stress through multi-tooth meshing, improving torque transmission efficiency compared to the traditional single splined shaft and avoiding eccentric vibration during high-speed rotation. Gear C15 is fixedly mounted on the outer side of splined shaft b5. Gear C15 meshes with the inner gear ring of collar 17, driving collar 17 to rotate around the central axis of the pump body 1. Connector 16 is rotatably fitted on the outer side of collar 17. Connector 16 is connected to collar 17 through bearings or sliding pairs to ensure that connector 16 can move synchronously and swing relative to collar 17 when it rotates. The end of connector 16 is hinged to plunger 12. When collar 17 rotates, connector 16 drives plunger 12 to perform axial reciprocating motion in plunger cavity. When collar 17 rotates to the proximal end, plunger 12 is pulled back into plunger cavity, increasing cavity volume and creating negative pressure. When rotated to the distal end, plunger 12 is pushed into plunger cavity, decreasing cavity volume and creating high pressure.

[0021] Please refer to Figure 1 , 2 3. The front end of the pump body 1 is provided with a docking end 8, and the upper and lower ends of the docking end 8 are respectively connected to the water outlet end 9 and the water inlet end 7. The water inlet end 7, the water outlet end 9 and the docking end 8 are fixedly connected by bolts. The side of the water inlet end 7 is provided with a water inlet docking end 11. The back of the water outlet end 9 is provided with several water outlet docking ends 10, and each water outlet docking end 10 is equipped with a control valve. The upper middle part of the water outlet end 9 is connected to an air chamber. A pressure gauge is provided on one side of the air chamber, and a regulating valve is installed on the other side of the air chamber. A return water end is provided on the lower side of the regulating valve.

[0022] The front end 8 of the pump body 1 is connected to the inlet end 7 and the outlet end 9 respectively. The inlet end 7 is connected to the oil tank through the inlet docking end 11, and the outlet end 9 is connected to the external hydraulic system through multiple outlet docking ends 10. When the plunger 12 moves backward, the one-way valve of the inlet end 7 opens, and hydraulic oil is drawn into the plunger cavity through the inlet docking end 11; when the plunger 12 moves forward, the one-way valve of the outlet end 9 opens, and high-pressure oil is discharged through the outlet docking end 10.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A splined shaft plunger pump, comprising a pump body (1), wherein the pump body (1) has an inner cavity and a plurality of plunger cavities communicating with the inner cavity, characterized in that: The pump body (1) is provided with a protrusion (4) and a protrusion end (18) on both sides respectively. A key shaft assembly is provided between the protrusion (4) and the protrusion end (18). A collar (17) is connected to the outer side of the key shaft assembly. A connector (16) is rotatably sleeved on the outer side of the collar (17). A plunger (12) is connected to the end of the connector (16). The plunger (12) is limited and located inside the plunger cavity.

2. The splined shaft plunger pump according to claim 1, characterized in that: The key shaft assembly includes a spline shaft a (6) and a spline shaft b (5). The spline shaft b (5) is disposed between the protrusion (4) and the protrusion end (18). A transmission assembly is provided between the spline shaft a (6) and the spline shaft b (5). A gear c (15) is provided on the outside of the spline shaft b (5). The gear c (15) meshes with the inside of the collar (17).

3. The splined shaft plunger pump according to claim 2, characterized in that: The transmission assembly includes gear a (13) and gear b (14), gear a (13) being positioned on the outside of spline shaft a (6), and gear b (14) being positioned on the outside of spline shaft b (5).

4. The splined shaft piston pump of any of claims 1-3, characterized in that: The pump body (1) is provided with a docking end (8) at the front end, and the upper and lower ends of the docking end (8) are respectively connected to the water outlet end (9) and the water inlet end (7). The water inlet end (7), the water outlet end (9) and the docking end (8) are fixedly connected by bolts.

5. The splined shaft piston pump of claim 4, wherein: The water inlet end (7) is provided with a water inlet docking end (11) on its side, and the water outlet end (9) is provided with a plurality of water outlet docking ends (10) on its back, and each water outlet docking end (10) is equipped with a control valve.

6. The splined shaft piston pump of claim 5, wherein: The upper middle part of the outlet end (9) is connected to an air chamber. A pressure gauge is installed on one side of the air chamber, and a regulating valve is installed on the other side of the air chamber. A return water end is installed on the lower side of the regulating valve.

Images