Semi-cycle gear transmission type circulating reciprocating pump device

Abstract

The invention discloses a semi-cycle gear transmission type circulating reciprocating pump device which comprises a fluid end, a transmission end box body, a reciprocating assembly and a transmission assembly. The reciprocating assembly comprises a groove-shaped ring rack, a semi-cycle gear and a piston, and a connecting rod is arranged between the groove-shaped ring rack and the piston; the transmission assembly comprises a motor and a transmission belt pulley, the motor is connected with a motor belt pulley, and a flexible belt is connected between the transmission belt pulley and the motor belt pulley; a half-cycle gear shaft is fixed on the transmission belt pulley; a rolling bearing is connected between the semi-cycle gear and the semi-cycle gear shaft; half-cycle teeth are arranged on the half circumference of the half-cycle gear, and racks meshed with the half-cycle teeth are arranged at the top and the bottom in the groove-shaped ring rack. Through the innovative design of the half-gear transmission mechanism, the power transmission path is optimized, the lateral force borne by the plunger or the piston in the movement process is reduced, the problem of eccentric wear caused by the lateral force is fundamentally solved, the operation stability of the reciprocating pump is improved, the service life of the reciprocating pump is prolonged, and the operation efficiency of the reciprocating pump is improved.

Description

Technical Field

[0001] This invention relates to the field of fluid machinery technology, and in particular to a semi-circular gear-driven reciprocating pump device. Background Technology

[0002] In the field of fluid machinery, reciprocating pumps, as key equipment that relies on the reciprocating motion of pistons or plungers within a pump cylinder to achieve fluid transport, are widely used in numerous industrial and civilian sectors, including petrochemicals, mining, water conservancy projects, and biomedicine, due to their core advantages such as stable high-pressure output capability, ability to transport high-viscosity media, and convenient flow rate adjustment. Whether it's high-pressure water injection in crude oil extraction, media metering and transportation in chemical production, or pressurization in urban water supply systems, reciprocating pumps play an irreplaceable role, and their operational stability and reliability directly affect the continuity and safety of the entire industrial production process.

[0003] However, in the long-term actual operation of reciprocating pumps, uneven wear of the plunger or piston remains a core technical pain point that restricts their service life, increases maintenance costs, and affects operational stability. Specifically, the power transmission of reciprocating pumps typically relies on traditional transmission structures such as crank-connecting rod mechanisms. During power transmission, when the rotational motion of the crank is converted into the linear reciprocating motion of the plunger or piston, lateral forces are often generated due to the structural characteristics of the transmission mechanism. This lateral force continuously acts on the mating surface between the plunger or piston and the pump cylinder, resulting in uneven wear between the plunger or piston and the inner wall of the pump cylinder, i.e., uneven wear.

[0004] The occurrence of uneven wear can trigger a series of adverse consequences: First, as the degree of uneven wear intensifies, the sealing performance between the plunger or piston and the pump cylinder will significantly decrease, leading to leakage of the conveyed medium. This not only wastes resources but may also cause safety accidents, such as fires or explosions caused by the leakage of flammable and explosive media. Second, uneven wear will significantly shorten the service life of key components such as plungers, pistons, and pump cylinders, increasing the frequency of equipment maintenance and replacement costs, and raising the production and operating costs of enterprises. Third, severe uneven wear will also affect the operating accuracy of reciprocating pumps, resulting in excessive flow fluctuations, which cannot meet the needs of high-precision conveying scenarios and limits the application expansion of reciprocating pumps in high-end industrial fields.

[0005] To address the aforementioned uneven wear problem, various improvement solutions have been proposed in existing technologies. These include optimizing the material of the plunger or piston, using high-wear-resistant alloys to improve the wear resistance of components; improving the sealing structure by adding components such as guide sleeves to reduce the impact of lateral forces on the sealing surface; and adjusting the assembly precision of the transmission mechanism to reduce mechanical interference during operation. However, practice shows that these existing solutions still have significant limitations: while using high-wear-resistant materials can extend service life to some extent, it cannot fundamentally eliminate the root cause of uneven wear caused by lateral forces, thus constituting a passive protection measure; adding structures such as guide sleeves complicates the pump body structure, increasing manufacturing and assembly difficulty, and may also increase motion resistance, affecting pump operating efficiency; adjusting assembly precision requires extremely high production processes, and during long-term operation, component wear will still lead to a decrease in assembly precision, causing the uneven wear problem to reappear.

[0006] Therefore, in the field of fluid machinery, there is an urgent need to develop a new type of transmission structure and reciprocating pump equipment that can fundamentally optimize the power transmission method, effectively offset or reduce lateral forces, and reduce the degree of wear, in response to the core technical pain point of uneven wear in reciprocating pumps.

[0007] Therefore, optimizing the power transmission path, reducing the lateral force on the plunger or piston during movement, solving the problem of uneven wear at its root, and improving the operational stability, service life, and efficiency of reciprocating pumps are urgent technical problems that need to be solved. Summary of the Invention

[0008] Purpose of the invention: In view of the shortcomings of the existing technology, the purpose of this invention is to propose a semi-circular gear transmission type reciprocating pump device, that is, through the innovative design of the semi-gear transmission mechanism, the power transmission path is optimized, the lateral force on the plunger or piston during the movement is reduced, the problem of uneven wear caused by lateral force is solved at the root, and the operation stability, service life and operating efficiency of the reciprocating pump are improved.

[0009] Technical solution: The present invention provides a semi-circular gear transmission type reciprocating pump device, which includes a hydraulic end, a transmission end housing, a reciprocating assembly, and a transmission assembly.

[0010] The reciprocating assembly includes a grooved ring rack, a semi-circular gear, and a piston, with a connecting rod between the grooved ring rack and the piston;

[0011] The transmission assembly includes a motor and a transmission pulley. The motor is connected to a motor pulley, and a flexible belt connects the transmission pulley and the motor pulley. A half-circular gear shaft is fixed on the transmission pulley.

[0012] A rolling bearing connects the half-circle gear to the half-circle gear shaft; the half-circle gear has half-circle teeth, and the top and bottom of the grooved ring rack have racks that mesh with the half-circle teeth.

[0013] The semi-circular gear has a semi-circular tooth oil reservoir and a lubricating oil hole.

[0014] A coupling connects the motor to the half-cycle gear shaft, and the motor directly drives the half-cycle gear shaft through the coupling.

[0015] The transmission pulley and the half-cycle gear shaft are connected by a key or pin.

[0016] A limiting guide roller is installed on the side of the grooved ring rack. The limiting guide roller is in close contact with the outer side of the grooved ring rack to avoid gaps between the limiting guide roller and the grooved ring rack.

[0017] Bolts connect the hydraulic end and the transmission end housing.

[0018] The pistons are symmetrically located on both sides of the grooved ring rack, and there is a connecting rod between the pistons and the grooved ring rack.

[0019] The top of the grooved ring rack has a first rack that meshes with the gear. When the half-circular gear meshes with the first rack, the grooved ring rack pushes the piston to move in one direction.

[0020] The bottom of the grooved ring rack has a second rack that meshes with the half-circular gear. When the half-circular gear meshes with the second rack, the grooved ring rack pushes the piston to move in the other direction.

[0021] The lubricating oil hole is connected to the root of the half-circumferential tooth, thus ensuring that the half-circumferential tooth and the rack are fully lubricated during operation.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0023] (1) The present invention achieves uniform piston speed through the transmission of half-cycle gear and rack, that is, the piston maintains constant speed reciprocating during the movement process; while the traditional crank connecting rod reciprocating pump operates the piston speed according to a sine law, and the speed fluctuates.

[0024] (2) In the existing reciprocating pump crank connecting rod transmission, there is a periodic lateral force between the piston and the inner bore of the cylinder, which inevitably leads to uneven wear between the piston and the inner bore of the cylinder. In the transmission of the half-circular gear and rack used in this invention, there are limit guide rollers on both sides of the grooved ring rack. The limit guide rollers are in close contact with both sides of the grooved ring rack to avoid gaps between the limit guide rollers and the grooved rack. This avoids the grooved ring rack from shifting to both sides during the movement, thereby enabling the piston and connecting rod to maintain high-precision linear movement and reducing uneven wear between the piston and the cylinder.

[0025] (3) In this invention, due to the uniformity of piston speed, the impact of the piston on the fluid in the hydraulic cylinder is significantly reduced, which reduces the impact force on various valves in the hydraulic end and thus improves the reliability of the valve.

[0026] (4) The present invention adopts a symmetrical layout of a semi-circular gear transmission type reciprocating pump device, that is, the two hydraulic ends are symmetrical about the semi-circular gear mechanism, and only one semi-circular gear is used for transmission, which can make one device play the role of two pumps, significantly reducing the length of the entire pump body and saving raw materials.

[0027] (5) The semi-circular gear in this invention is provided with an oil reservoir to facilitate lubrication of the gear and rack meshing. Attached Figure Description

[0028] Figure 1 This is a main sectional view of the semi-circular gear transmission reciprocating pump device of the present invention.

[0029] Figure 2 This is a longitudinal sectional view of the semi-circular gear-driven reciprocating pump device of the present invention.

[0030] Figure 3 This is a cross-sectional view of the semi-circular gear transmission reciprocating pump device of the present invention.

[0031] Figure 4 This is a symmetrical schematic diagram of the semi-circular gear transmission reciprocating pump device of the present invention;

[0032] Figure 5 This is a diagram illustrating the working process of the half-cycle gear transmission of the present invention.

[0033] Figure 6 This is a schematic diagram of a partial structure of the semi-circular gear of the present invention. Detailed Implementation

[0034] like Figures 1 to 6 As shown, the semi-circular gear transmission type reciprocating pump device of the present invention includes a hydraulic end 1, a transmission end housing 2, a reciprocating assembly, and a transmission assembly.

[0035] The reciprocating assembly includes a grooved ring rack 3, a semi-circular gear 6, and a piston 4, wherein there is a connecting rod 5 between the grooved ring rack 3 and the piston 4.

[0036] The transmission assembly includes a motor 14, a transmission pulley 10, a half-cycle gear shaft 8, a rolling bearing 9, a transmission pulley 10, a motor pulley 11, a flexible belt 12, and a half-cycle gear oil reservoir cap 13.

[0037] The hydraulic end 1 and the transmission end housing 2 are fixedly connected by bolts. The grooved ring rack 3, piston 4, and connecting rod 5 are fixedly connected by bolts to form a movable component. The piston 4 reciprocates within the cylinder of the hydraulic end 1. The grooved ring rack 3 is limited by four limiting guide rollers 7. The specific limiting method is as follows: the limiting guide rollers 7 are in close contact with the outer side of the grooved ring rack 3 to avoid gaps between the limiting guide rollers 7 and the grooved ring rack 3; and the four limiting guide rollers 7 are respectively installed on two sides of the grooved ring rack 3 to ensure that the grooved ring rack will not shift to the sides during movement. The half-circular gear 6 forms a rotating mechanism through the half-circular gear shaft 8 and the rolling bearing 9. The transmission pulley 10 is fixedly connected to the half-circular gear shaft 8 by a key pin; the motor pulley 11 is directly connected to the motor 13.

[0038] The top of the grooved ring rack 3 has a first rack that meshes with the semi-circular teeth 6-1, and the bottom of the grooved ring rack 3 has a second rack that meshes with the semi-circular teeth 6-1.

[0039] like Figure 5 As shown, when the motor 13 starts, the motor pulley 11 transmits power to the transmission pulley 10 through the flexible belt 12, which drives the half-circular gear 6 to rotate. The half-circular teeth 6-1 on the half-circular gear 6 mesh with the first and second racks 3-1 of the grooved ring rack 3, thereby driving the grooved ring rack 3 to move. Since the grooved ring rack 3, the connecting rod 5, and the piston 4 move as a whole, the reciprocating motion of the piston 4 is realized.

[0040] As attached Figure 5 As shown, since the half-circular gear 6 is only half a gear on the entire circumference, when the half-circular gear 6 meshes with the bottom tooth of the grooved ring rack 3, the grooved ring rack 3 pushes the piston 4 to the left; when the half-circular gear 6 meshes with the top tooth of the grooved ring rack 3, the grooved ring rack 3 pushes the piston 4 to the right, thereby realizing the continuous reciprocating motion of the piston 4.

[0041] Furthermore, the semi-tooth drive reciprocating pump in this invention can adopt a symmetrical layout, as shown in the attached figure. Figure 4 As shown.

[0042] Furthermore, in this invention, the motor is directly connected to the half-cycle gear shaft via a coupling to achieve direct drive.

[0043] like Figure 6 As shown, the semi-circular gear 6 of the present invention is provided with a semi-circular tooth oil storage groove 6-2 and a lubrication hole 6-3 communicating with the tooth root of each semi-circular tooth 6-1. In this way, when the semi-circular gear 6 rotates, due to the centrifugal force, the lubricating oil in the semi-circular tooth oil storage groove enters the tooth root of the semi-circular gear through the lubrication hole, thereby ensuring that the semi-circular teeth and rack are fully lubricated during operation.

Claims

1. A semi-circular gear-driven reciprocating pump device, characterized in that: Includes a hydraulic end (1), a transmission end housing (2), a reciprocating assembly, and a transmission assembly; The reciprocating assembly includes a grooved ring rack (3), a semi-circular gear (6), and a piston (4), with a connecting rod (5) between the grooved ring rack (3) and the piston (4); The transmission assembly includes a motor (14) and a transmission pulley (10). The motor (13) is connected to a motor pulley (11), and a flexible belt (12) is connected between the transmission pulley (10) and the motor pulley (11). A half-circular gear shaft (8) is fixed on the transmission pulley (10). A rolling bearing (9) is connected between the half-circumference gear (6) and the half-circumference gear shaft (8); there are half-circumference teeth (6-1) on half of the circumference of the half-circumference gear (6), and there are racks at the top and bottom of the grooved ring rack (3) that mesh with the half-circumference teeth (6-1).

2. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: The semi-circular gear (6) is provided with a semi-circular gear oil reservoir (6-2) and a lubricating oil hole (6-3).

3. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: A coupling is connected between the motor (13) and the half-cycle gear shaft (8).

4. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: The transmission pulley (10) and the half-circular gear shaft (8) are connected by a key or pin.

5. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: The grooved ring toothed rack (3) is equipped with a limiting guide roller (7) on its side.

6. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: The hydraulic end (1) is connected to the transmission end housing (2) by bolts.

7. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: The piston (4) is symmetrically located on both sides of the grooved ring rack (3), and there is a connecting rod (5) between the piston (4) and the grooved ring rack (3).

8. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: The top of the grooved ring rack (3) has a first rack that meshes with the gear (6-1).

9. The semi-circular gear-driven reciprocating pump device according to claim 1, characterized in that: The bottom of the grooved ring rack (3) has a second rack that meshes with the semi-circular teeth (6-1).

10. The semi-circular gear-driven reciprocating pump device according to claim 2, characterized in that: The lubricating oil hole (6-3) is connected to the root of the semi-circular tooth (6-1).

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