Integrated all-cast copper crankshaft connecting rod for plunger pump

Abstract

The utility model discloses an integrated all-cast copper crankshaft connecting rod for a plunger pump, and particularly relates to the technical field of plunger pumps, the integrated all-cast copper crankshaft connecting rod comprises a connecting rod used for connecting a small end and a large end, the connecting rod, the large end and the small end are all made of copper alloy materials, and two groups of auxiliary parts used for reducing friction loss are arranged in the large end; and each group of auxiliary parts comprises a self-lubricating bushing arranged in the large end. The large end, the small end and the connecting rod are made of copper alloy materials, so that the large end, the small end and the connecting rod have excellent anti-fatigue performance, abrasion resistance and thermal stability, abrasion can be reduced, the service life is prolonged, meanwhile, friction and abrasion between the large end, the small end and the connecting rod and other components are reduced through the design that a bearing bush is omitted, and the service life is prolonged. And through the simplified connecting rod structure and the high-quality copper alloy material, the large end, the small end and the connecting rod can transmit power more smoothly and efficiently in the operation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to plunger pump technical field more specifically, it is a kind of integrated full cast copper crank connecting rod for plunger pump. BACKGROUND

[0002] Connecting rod is used to connect crankshaft and plunger, and the rotating motion of crankshaft is transmitted to plunger, and plunger is pushed to do reciprocating linear motion. Its bar section generally adopts I-shaped, large head is split type, bearing bush adopts split thin wall tile form, small head is positioned using shaft sleeve type, and plunger pump crank connecting rod mechanism plays an indispensable role in multiple industries with its unique structure and excellent performance characteristics.

[0003] As shown in the prior art with publication number CN219509803U, although the prior art makes the continuous alternating load provided during the rotation of crankshaft have better impact resistance adaptability by the combination of different hardness materials, so that the movement of connecting rod mechanism is more stable, and response is more rapid and flexible, and effectively reduces the contact wear of peak stress area by the self-lubricating property of polyether ether ketone, effectively improves the service life of connecting rod mechanism. However, the connecting rod structure in the prior art is relatively complex, and includes multiple components, such as connecting rod large head, small head and tile structure. The cooperation and connection between these components require high precision and reliability, which increases the manufacturing and maintenance difficulty. During the reciprocating motion of connecting rod, there is friction between connecting rod, crankshaft, plunger and other components, which is easy to cause wear. Especially under high load and high speed working conditions, the wear problem is more prominent. Wear not only reduces the strength and stiffness of connecting rod, but also affects the performance and reliability of pump, and even causes failure. The connecting rod structure needs good lubrication to reduce friction and wear. However, due to the complexity of connecting rod structure, the design and maintenance of lubrication system are also relatively complex. Because of the complexity and wearability of connecting rod structure, the maintenance cost is relatively high. Especially under high load and high speed working conditions, the maintenance frequency and cost of connecting rod will increase. SUMMARY

[0004] Therefore, the utility model embodiment provides a kind of integrated full cast copper crank connecting rod for plunger pump to solve the problem that the cooperation and connection between connecting rod structure in prior art are required high precision and reliability due to the relatively complex connecting rod structure, which increases the manufacturing and maintenance difficulty.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme: an integrated full cast copper crank connecting rod for plunger pump, comprising a connecting rod for connecting a small end and a large end, the connecting rod, the large end and the small end are all made of copper alloy material, the large end is internally provided with two groups of auxiliary parts for reducing friction loss;

[0006] Each auxiliary part comprises a self-lubricating bushing arranged inside the large end, a heat-conducting ring is arranged on one side of the self-lubricating bushing close to the large end, a high-heat layer is arranged between the heat-conducting ring and the self-lubricating bushing, and two heat-dissipating plates are arranged on the side of the heat-conducting ring away from the self-lubricating bushing, and the two heat-dissipating plates are symmetrically distributed about the central axis of the heat-conducting ring.

[0007] Further, the large end comprises a fixed end and a movable end, the fixed end is arranged on the top of the movable end, and the top of the fixed end is fixed with the bottom of the connecting rod;

[0008] The side close to the fixed end and the movable end of each auxiliary part is provided with a ring groove, and the side away from the fixed end and the movable end is provided with two spaced-arranged embedding holes, and the embedding holes are communicated with the ring groove.

[0009] The heat-conducting ring and the self-lubricating bushing are arranged inside the ring groove, and the heat-dissipating plates are arranged inside the embedding holes.

[0010] Further, the self-lubricating bushing is made of graphene material.

[0011] Further, the high-heat layer is coated on the outside of the self-lubricating bushing by using aluminum nitride material.

[0012] Further, the fixed seat is arranged on both sides of the bottom end of the fixed end, the positioning hole and the fixing hole are arranged on the outside of the fixed seat in a communicated mode, and the fixing hole is arranged on the top of the positioning hole.

[0013] Further, the movable seat is arranged on both sides of the top end of the movable end, the movable hole is arranged on the outside of the movable seat, the positioning ring is arranged inside the movable hole, and the top end of the positioning ring extends into the positioning hole.

[0014] Further, the fastening bolt is arranged on the bottom of the movable seat, the top end of the fastening bolt penetrates through the positioning ring and extends into the fixing hole, and the fastening bolt is threadedly connected with the inner wall of the fixing hole on the outside.

[0015] Further, the fixed end and the movable end are provided with a plurality of spaced-arranged assembly holes on the front and rear sides, and the assembly hole is provided with an assembly bolt for fastening the self-lubricating bushing.

[0016] The utility model has the advantages of:

[0017] 1. The big end, small end and connecting rod are made of copper alloy material with good physical and chemical properties, so that the big end, small end and connecting rod have excellent fatigue resistance, wear resistance and thermal stability, which can reduce wear and prolong service life, and the friction and wear between the big end, small end and connecting rod and other parts are reduced by canceling the design of the bearing, effectively reducing the failure rate and maintenance cost of the mechanical device, and the big end, small end and connecting rod can more smoothly and efficiently transmit power during operation through the simplified connecting rod structure and high-quality copper alloy material. This helps to improve the overall efficiency and performance of the mechanical device.

[0018] 2. The high-heat layer is made of aluminum nitride material with high thermal conductivity, which can conduct heat from the self-lubricating bushing to the heat-conducting ring, and then dissipate heat through the heat sink in contact with the external environment, thereby quickly conducting the heat generated by friction, reducing the temperature of the connecting rod friction area, avoiding heat accumulation to cause equipment wear, and ensuring use performance and prolonging service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only exemplary, and those skilled in the art can obtain other implementation drawings according to the provided drawings without creating any creative labor.

[0020] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the present application can produce, should still fall within the scope of the technical content disclosed by the present application.

[0021] Figure 1 is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 is an exploded view of the big end of the present application;

[0023] Figure 3 is an exploded view of the fixed end of the present application;

[0024] Figure 4 is an exploded view of the movable end of the present application;

[0025] Figure 5 is a cross-sectional view of the high-heat layer of the present application.

[0026] In the figure: 1, small end; 2, large end; 3, connecting rod; 4, self-lubricating bushing; 5, heat-conducting ring; 6, high-heat layer; 7, heat sink; 8, fixed end; 9, movable end; 10, ring groove; 11, embedded hole; 12, fixed seat; 13, positioning hole; 14, fixed hole; 15, movable seat; 16, movable hole; 17, positioning ring; 18, fastening bolt; 19, assembly hole; 20, assembly bolt. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosed content of the specification. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0028] Referring to the drawings accompanying Figures 1-5 The present application provides a kind of integral type full cast copper crank connecting rod for plunger pump, including the connecting rod 3 for connecting small end 1 and large end 2, connecting rod 3, large end 2 and small end 1 are all made of copper alloy material, and two groups of auxiliary parts for reducing friction loss are arranged in large end 2.

[0029] Each group of auxiliary parts includes self-lubricating bushing 4 arranged in the inside of large end 2, self-lubricating bushing 4 is made of graphene material, heat-conducting ring 5 is installed on the side of self-lubricating bushing 4 close to large end 2, and high-heat layer 6 is arranged between heat-conducting ring 5 and self-lubricating bushing 4, high-heat layer 6 is coated on the outside of self-lubricating bushing 4 by aluminum nitride material, two heat sinks 7 are installed on the side of heat-conducting ring 5 away from self-lubricating bushing 4, and two heat sinks 7 are symmetrically distributed about the center axis of heat-conducting ring 5.

[0030] By adopting the copper alloy material with good physical and chemical properties to make the big end 2, the small end 1 and the connecting rod 3, the big end 2, the small end 1 and the connecting rod 3 have excellent fatigue resistance, which means that the connecting rod 3 can still maintain good working condition under long-time and high-load working conditions and is not prone to fatigue fracture. At the same time, the hardness of the copper alloy is relatively high, so that the big end 2, the small end 1 and the connecting rod 3 have better wear resistance when contacting with other components. This helps to reduce the wear of the big end 2, the small end 1 and the connecting rod 3 during use and prolong the service life thereof. The copper alloy can still maintain good physical and chemical properties under high-temperature environment, so that the big end 2, the small end 1 and the connecting rod 3 can also maintain stable performance under high-temperature conditions. This is particularly important for mechanical devices that need to work in high-temperature environment. By canceling the design of the bearing bush, the friction and wear between the big end 2, the small end 1 and the connecting rod 3 and other components are reduced, thereby reducing the failure rate and maintenance cost of the mechanical device. Through the simplified structure of the connecting rod 3 and the high-quality copper alloy material, the big end 2, the small end 1 and the connecting rod 3 can more smoothly and efficiently transmit power during operation. This helps to improve the overall efficiency and performance of the mechanical device.

[0031] Further, by adopting the graphene material to make the self-lubricating bushing 4, the self-lubricating bushing 4 can form a directional sliding surface during friction by the layered structure of graphene, achieving a lubrication effect similar to a "molecular bearing", thereby reducing wear and prolonging the service life. At the same time, the high-thermal-conductivity aluminum nitride material is adopted to make the high-thermal-layer 6, which can conduct heat from the self-lubricating bushing 4 to the heat-conducting ring 5, and the heat-conducting ring 5 can then dissipate heat with the help of the heat-dissipating plate 7 in contact with the external environment. In this way, the heat generated by friction can be quickly conducted out, reducing the temperature of the friction area of the connecting rod 3 and avoiding the accumulation of heat to cause equipment wear.

[0032] At the same time, in order to facilitate the maintenance of the auxiliary parts, it is necessary to realize the convenient disassembly and assembly of the auxiliary parts. As shown in Figure 1 and 2 , the big end 2 includes a fixed end 8 and a movable end 9, the fixed end 8 is arranged at the top of the movable end 9, and the top of the fixed end 8 is fixed together with the bottom of the connecting rod 3; the fixed end 8 and the movable end 9 are both provided with a ring groove 10 on the side close to each other, and the fixed end 8 and the movable end 9 are both provided with two spaced-apart embedded holes 11 on the side away from each other, the embedded holes 11 are in communication with the ring groove 10; the heat-conducting ring 5 and the self-lubricating bushing 4 are both arranged inside the ring groove 10, and the heat-dissipating plate 7 is arranged inside the embedded hole 11; the fixed end 8 and the movable end 9 form the big end 2, so that the fixed end 8 and the movable end 9 are of a detachable structure, thereby facilitating the disassembly of the movable end 9 and the fixed end 8 by the workers, so that there is enough space to assemble the auxiliary parts inside the ring groove 10 and the embedded hole 11, and the detachable structure of the movable end 9 and the fixed end 8 can facilitate the replacement when a single structure is damaged, without the need for overall replacement, thereby reducing the use cost.

[0033] Assembling the fixed end 8 and the movable end 9, it is necessary to ensure the stability of the structure of both, such as Figures 1-4 As shown, the fixed end 8 is provided with a fixed seat 12 on both sides of the bottom end, and the fixed seat 12 is provided with a positioning hole 13 and a fixed hole 14 which are connected and communicated, and the fixed hole 14 is arranged at the top of the positioning hole 13. The movable end 9 is provided with a movable seat 15 on both sides of the top end, and the movable seat 15 is provided with a movable hole 16 on the outside, and the movable hole 16 is provided with a positioning ring 17 on the inside, and the positioning ring 17 extends to the inside of the positioning hole 13 at the top end. The movable seat 15 is provided with a fastening bolt 18 at the bottom, and the fastening bolt 18 extends to the inside of the fixed hole 14 through the positioning ring 17 at the top end, and the fastening bolt 18 is threadedly connected with the inner wall of the fixed hole 14 on the outside. Through the correspondence of the positioning column and the positioning hole 13, the movable end 9 can be precisely assembled to the bottom of the fixed end 8. Then, the fastening bolt 18 is operated to be assembled to the inside of the fixed hole 14 through the movable hole 16. By the threaded connection of the fastening bolt 18 and the fixed hole 14, the movable end 9 can be fixed to the bottom of the fixed end 8, so as to ensure the connection stability between the movable end 9 and the fixed end 8. At the same time, by the assembly mode of the fastening bolt 18, it is also convenient to disassemble and maintain the movable end 9 and the fixed end 8.

[0034] When assembling the auxiliary part to the large end 2, it is necessary to ensure the connection stability between the auxiliary part and the large end 2, such as Figure 3 and 4 As shown, the fixed end 8 and the movable end 9 are provided with a plurality of spaced distribution assembly holes 19 on the front and rear sides. Each assembly hole 19 is provided with an assembly bolt 20 for fastening the self-lubricating bushing 4 on the inside. By fixing the self-lubricating bushing 4 through the assembly bolt 20, the connection tightness between the self-lubricating bushing 4 and the large end 2 can be ensured, so as to avoid the separation of the self-lubricating bushing 4. At the same time, it is also convenient to disassemble the assembly bolt 20 to take down the auxiliary part for maintenance.

[0035] Although the utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model, all belong to the scope of protection required by the utility model.

Claims

1. An integrated full bronze crank and rod for a plunger pump characterized by: It includes connecting rod (3) for connecting small end (1) and big end (2), connecting rod (3), big end (2) and small end (1) are all made of copper alloy material, big end (2) is internally provided with two groups of auxiliary parts for reducing friction loss; Each group of auxiliary parts includes self-lubricating bushing (4) arranged in big end (2), heat conducting ring (5) is arranged on the side of self-lubricating bushing (4) close to big end (2), high heat layer (6) is arranged between heat conducting ring (5) and self-lubricating bushing (4), two heat dissipation plates (7) are arranged on the side of heat conducting ring (5) away from self-lubricating bushing (4), and the two heat dissipation plates (7) are symmetrically distributed about the central axis of heat conducting ring (5).

2. The one-piece, all-bronze crank and connecting rod assembly for a plunger pump of claim 1, wherein: Big end (2) includes fixed end (8) and movable end (9), fixed end (8) is arranged at the top of movable end (9), and the top of fixed end (8) is fixed with the bottom of connecting rod (3); The side close to fixed end (8) and movable end (9) is provided with ring groove (10), and the side away from fixed end (8) and movable end (9) is provided with two spaced embedded holes (11), the embedded hole (11) is communicated with the ring groove (10); Heat conducting ring (5) and self-lubricating bushing (4) are arranged in the ring groove (10), and the heat dissipation plate (7) is arranged in the embedded hole (11).

3. The one-piece, all-bronze crank and connecting rod assembly for a plunger pump of claim 1, wherein: Self-lubricating bushing (4) is made of graphene material.

4. The one-piece, all-bronze crank and connecting rod assembly for a plunger pump of claim 1, wherein: High heat layer (6) is coated on the outside of self-lubricating bushing (4) by using aluminum nitride material.

5. The one-piece, all-bronze crank and connecting rod assembly for a plunger pump of claim 2, wherein: The bottom of fixed end (8) is provided with fixed seat (12), the outside of fixed seat (12) is provided with positioning hole (13) and fixed hole (14) in communication, and the fixed hole (14) is arranged at the top of positioning hole (13).

6. The one-piece, all-bronze crank and connecting rod assembly for a plunger pump of claim 5 wherein: The top of movable end (9) is provided with movable seat (15), the outside of movable seat (15) is provided with movable hole (16), the inside of movable hole (16) is provided with positioning ring (17), and the top of positioning ring (17) extends into the inside of positioning hole (13).

7. The one-piece, all-bronze-cast crank and rod assembly for a plunger pump of claim 6 wherein: The bottom of movable seat (15) is provided with fastening bolt (18), the top of fastening bolt (18) penetrates through positioning ring (17) and extends into the inside of fixed hole (14), and the outside of fastening bolt (18) is threadedly connected with the inner wall of fixed hole (14).

8. The one-piece, all bronze crank and rod assembly for a plunger pump of claim 2, wherein: The front and rear sides of fixed end (8) and the front and rear sides of movable end (9) are provided with a plurality of spaced assembly holes (19), and each assembly hole (19) is provided with assembly bolt (20) for fastening self-lubricating bushing (4).

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