Liquid inlet assembly for high flow plunger pump

Abstract

A kind of liquid inlet assembly of large flow plunger pump, including plunger head, liquid inlet steel ball seat and roller pin, roller pin and plunger head are respectively arranged at the two ends of liquid inlet steel ball seat, liquid inlet passage that is connected with the inside of plunger head is formed in liquid inlet steel ball seat, liquid inlet port that is connected with liquid inlet passage and the outside of liquid inlet steel ball seat is opened in liquid inlet steel ball seat, by opening liquid inlet port in liquid inlet steel ball seat, and roller pin uses simple cylindrical structure, compared with the structure that liquid inlet port is opened in roller pin in prior art, the design roller pin simple structure, shape is regular, reduces processing difficulty, shortens processing cycle, reduces cost, and liquid inlet port is opened in liquid inlet steel ball seat, the size and shape of liquid inlet port can be more flexibly designed to meet the liquid inlet demand of large flow plunger pump under different working conditions, improve liquid inlet efficiency.Meanwhile, this design makes the layout of liquid inlet passage more reasonable, it is favorable for the smooth flow of liquid in component, reduces the energy loss due to unsmooth flow, further improves the overall performance of large flow plunger pump.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, and specifically to a liquid inlet assembly for a high-flow-rate plunger pump. Background Technology

[0002] In the prior art, the liquid inlet of the plunger pump is usually set on the needle roller. This increases the difficulty of machining the needle roller. At the same time, since the needle roller needs to bear the function of liquid inlet, its structural strength and stability will also be affected to a certain extent, which may affect the overall performance and service life of the plunger pump. Summary of the Invention

[0003] In view of this, the present invention provides a liquid inlet assembly for a high-flow-rate plunger pump.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A liquid inlet assembly for a high-flow-rate plunger pump includes a plunger head, a liquid inlet ball seat, and a needle roller. The needle roller and the plunger head are respectively disposed at both ends of the liquid inlet ball seat. A liquid inlet channel is formed inside the liquid inlet ball seat, communicating with the interior of the plunger head. An inlet port is provided on the liquid inlet ball seat, communicating with the liquid inlet channel and the exterior of the liquid inlet ball seat.

[0005] Preferably, the top of the inlet ball seat has a needle roller groove that connects to the inlet channel, one end of the needle roller extends into the needle roller groove and connects to the inlet ball seat, a plunger channel is formed inside the plunger head, and the bottom end of the inlet ball seat extends into the plunger channel and connects to the plunger head.

[0006] Preferably, an installation cavity is formed inside the plunger head, and an inlet spring and a sealing steel ball are disposed inside the installation cavity. A spring positioning end is formed by protruding from the center of the inner wall of the side of the installation cavity away from the inlet steel ball seat. The bottom of the inlet spring is sleeved on the spring positioning end, and the sealing steel ball is disposed on the top of the inlet spring. The inlet spring supports the sealing steel ball, and the sealing steel ball controls the flow between the plunger head and the inlet steel ball seat.

[0007] Preferably, three liquid inlets are provided at equal intervals along the circumference of the liquid inlet ball seat, and the inner diameter of the liquid inlet is φ3mm.

[0008] Preferably, the end of the needle roller extending into the needle roller groove is interference-fitted with the inner wall of the needle roller groove, and the end of the liquid inlet steel ball seat extending into the plunger channel is interference-fitted with the inner wall of the plunger channel.

[0009] Preferably, the inner height of the mounting cavity is 5mm.

[0010] Preferably, the needle rollers are formed by powder metallurgy sintering.

[0011] The beneficial effects of this invention are as follows: By placing the liquid inlet on the inlet ball seat and using a simple cylindrical structure for the needle roller, compared to the existing technology where the liquid inlet is located on the needle roller itself, this design features a simpler and more regular needle roller structure, reducing processing difficulty, shortening the processing cycle, and lowering costs. Furthermore, placing the liquid inlet on the inlet ball seat allows for more flexible design of the inlet size and shape to meet the liquid inlet requirements of high-flow-rate plunger pumps under different operating conditions, thus improving inlet efficiency. Simultaneously, this design makes the layout of the inlet channel more rational, facilitating smooth liquid flow within the assembly, reducing energy loss due to poor flow, and further enhancing the overall performance of the high-flow-rate plunger pump. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Appendix Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

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

[0015] The present invention will now be further described with reference to the accompanying drawings.

[0016] This utility model provides the following technical solution: As attached Figure 1As shown, this utility model discloses a liquid inlet assembly for a high-flow-rate plunger pump, including a plunger head 1, a liquid inlet ball seat 2, and a needle roller 3. The needle roller 3 and the plunger head 1 are respectively disposed at both ends of the liquid inlet ball seat 2. A liquid inlet channel 4 is formed inside the liquid inlet ball seat 2, connecting the interior of the plunger head 1. A liquid inlet port 5 is provided on the liquid inlet ball seat 2, connecting the liquid inlet channel 4 and the exterior of the liquid inlet ball seat 2. Specifically, in this design, by placing the liquid inlet port 5 on the liquid inlet ball seat 2, and using a simple cylindrical structure for the needle roller 3, compared to the existing technology where the liquid inlet port 5 is placed on the needle roller 3, this design features a simpler and more regular needle roller 3 structure, reducing processing difficulty, shortening the processing cycle, and lowering costs. Furthermore, placing the liquid inlet port 5 on the liquid inlet ball seat 2 allows for more flexible design of the size and shape of the liquid inlet port 5 to meet the liquid inlet requirements of the high-flow-rate plunger pump under different operating conditions, thereby improving liquid inlet efficiency. At the same time, this design makes the layout of the liquid inlet channel 4 more reasonable, which is conducive to the smooth flow of liquid in the component, reduces energy loss caused by poor flow, and further improves the overall performance of the high-flow plunger pump.

[0017] Furthermore, a needle roller groove 6 is formed at the top of the inlet ball bearing seat 2, connecting to the inlet channel 4. One end of the needle roller 3 extends into the needle roller groove 6 and connects to the inlet ball bearing seat 2. A plunger channel 7 is formed inside the plunger head 1, and the bottom end of the inlet ball bearing seat 2 extends into the plunger channel 7 and connects to the plunger head 1. Specifically, in this embodiment, the needle roller groove 6 provides a stable installation position for the needle roller 3, ensuring that the needle roller 3 will not shift or fall off during operation, thereby ensuring the reliability and stability of the inlet assembly. At the same time, the connection method of one end of the needle roller 3 extending into the needle roller groove 6 and connecting to the inlet ball bearing seat 2 is simple and firm, and easy to assemble and disassemble. The plunger channel 7 formed inside the plunger head 1 connects to the bottom end of the inlet ball bearing seat 2, so that a smooth connection is formed between the inlet channel 4 and the plunger channel 7. Liquid can smoothly enter the inlet channel 4 from the inlet port 5 and then flow out through the plunger channel 7, realizing an efficient and stable inlet process. This structural design not only improves the liquid inlet efficiency of the high-flow-rate plunger pump, but also enhances the structural strength and durability of the entire pump body.

[0018] Furthermore, an installation cavity 8 is formed within the plunger head 1. An inlet spring 9 and a sealing steel ball 10 are disposed within the installation cavity 8. A spring positioning end 11 protrudes from the center of the inner wall of the installation cavity 8 on the side away from the inlet steel ball seat 2. The bottom of the inlet spring 9 is fitted onto the spring positioning end 11, and the sealing steel ball 10 is disposed on top of the inlet spring 9. The inlet spring 9 supports the sealing steel ball 10, and the sealing steel ball 10 controls the flow between the plunger head 1 and the inlet steel ball seat 2. Specifically, in this embodiment, the inlet spring 9 and the sealing steel ball 10 disposed within the installation cavity 8 constitute the key control part of the inlet assembly. The design of the spring positioning end 11 ensures that the inlet spring 9 can be stably installed within the installation cavity 8, preventing displacement or loosening, thereby guaranteeing the stable support of the sealing steel ball 10. Under the action of the inlet spring 9, the sealing steel ball 10 can precisely control the flow between the plunger head 1 and the inlet steel ball seat 2. When liquid is introduced, the liquid pressure overcomes the elastic force of the inlet spring 9, pushing the sealing steel ball 10 away from the inlet port 5, allowing the liquid to smoothly enter the inlet channel 4. When liquid introduction stops, the elastic force of the inlet spring 9 causes the sealing steel ball 10 to reseal the inlet port 5, preventing liquid backflow. This design not only improves the sealing performance of the inlet assembly but also ensures precise control of the liquid introduction process, further enhancing the working efficiency and reliability of the high-flow plunger pump.

[0019] Furthermore, three inlet ports 5 are equally spaced along the circumference of the inlet ball seat 2, and the inner diameter of each inlet port 5 is φ3mm. Specifically, in this embodiment, by arranging three inlet ports 5 equally spaced along the circumference of the inlet ball seat 2 and setting the inner diameter of each inlet port 5 to φ3mm, the oil inlet area of ​​the plunger pump is increased, which is beneficial for oil intake into the plunger pump and improves the working efficiency of the plunger pump. The effect is particularly obvious when dealing with conditions such as reduced brake fluid flow under extreme environments.

[0020] Furthermore, the end of the needle roller 3 extending into the needle roller groove 6 is interference-fitted with the inner wall of the needle roller groove 6, and the end of the inlet ball seat 2 extending into the plunger channel 7 is interference-fitted with the inner wall of the plunger channel 7. Specifically, in this embodiment, the end of the needle roller 3 extending into the needle roller groove 6 is interference-fitted with the inner wall of the needle roller groove 6. This tight fit ensures that the needle roller 3 can maintain a stable position even when operating at high speed or under high pressure, without loosening or shaking, thereby ensuring the reliability and stability of the inlet assembly and avoiding problems such as poor inlet flow or leakage caused by the displacement of the needle roller 3. Similarly, the end of the inlet ball seat 2 extending into the plunger channel 7 is also interference-fitted with the inner wall of the plunger channel 7. This design makes the connection between the inlet ball seat 2 and the plunger head 1 tighter and more secure, effectively preventing liquid leakage during the inlet process and improving the sealing performance of the entire inlet assembly. Meanwhile, the interference fit also enhances the structural strength of the components, enabling the inlet assembly to better withstand various forces and vibrations during operation, further extending the service life of the high-flow plunger pump.

[0021] Furthermore, the inner height of the mounting cavity 8 is 5mm. Specifically, in this embodiment, setting the inner height of the mounting cavity 8 to 5mm increases the stroke of the sealing steel ball 10, which is beneficial for improving the oil inlet rate and increasing the working efficiency of the plunger pump.

[0022] Furthermore, the needle roller 3 is formed by powder metallurgy sintering. Specifically, in this embodiment, the needle roller 3 adopts powder metallurgy sintering process, which has better heat treatment effect, denser material, and better wear resistance than the existing method of processing after heat treatment of a whole bar.

[0023] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid inlet assembly for a high-flow-rate plunger pump, characterized in that: The device includes a plunger head, a liquid inlet ball seat, and a needle roller. The needle roller and the plunger head are respectively located at both ends of the liquid inlet ball seat. A liquid inlet channel is formed inside the liquid inlet ball seat, connecting the interior of the plunger head. A liquid inlet is provided on the liquid inlet ball seat, connecting the liquid inlet channel and the outside of the liquid inlet ball seat. An installation cavity is formed inside the plunger head, and a liquid inlet spring and a sealing ball are installed in the installation cavity. A spring positioning end protrudes from the center of the inner wall of the side of the installation cavity away from the liquid inlet ball seat. The bottom of the liquid inlet spring is sleeved on the spring positioning end. The sealing ball is located on the top of the liquid inlet spring, and the liquid inlet spring supports the sealing ball. The sealing ball controls the flow between the plunger head and the liquid inlet ball seat. Three liquid inlets are equally spaced along the circumference of the liquid inlet ball seat, and the inner diameter of each liquid inlet is φ3mm.

2. The inlet assembly of the high-flow-rate plunger pump according to claim 1, characterized in that: The top of the inlet ball seat has a needle roller groove that connects to the inlet channel. One end of the needle roller extends into the needle roller groove and connects to the inlet ball seat. A plunger channel is formed inside the plunger head. The bottom end of the inlet ball seat extends into the plunger channel and connects to the plunger head.

3. The inlet assembly of the high-flow-rate plunger pump according to claim 2, characterized in that: The end of the needle roller that extends into the needle roller groove is interference-fitted with the inner wall of the needle roller groove, and the end of the liquid inlet steel ball seat that extends into the plunger channel is interference-fitted with the inner wall of the plunger channel.

4. The inlet assembly of the high-flow-rate plunger pump according to claim 1, characterized in that: The inner height of the mounting cavity is 5mm.

5. The inlet assembly of the high-flow-rate plunger pump according to claim 1, characterized in that: The needle rollers are formed by powder metallurgy sintering.

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