Fuel pump flow regulating valve with detachable vortex eliminator

Abstract

The utility model belongs to fuel pump technical field, concretely relates to a fuel pump flow regulating valve with detachable vortex elimination guide vane, including valve disc and the adjusting shaft of horizontal wear in the center of valve disc, still include: vortex elimination guide vane subassembly, detachably located in the downstream side of valve disc, vortex elimination guide vane subassembly includes the mounting base body of sticking to the disc surface of valve disc, the guide vane of vertical setting on mounting base body, and mounting base body is detachably fixedly connected with valve disc through fastener, wherein the plate body of guide vane is equipped with the pressure-equalizing guide hole of through both sides, and the downstream terminal of guide vane is equipped with sawtooth shaped vortex breaker. The utility model can effectively scatter the vortex behind the valve, balance the pressure behind the valve, suppress the cavitation damage, and the subassembly can be individually disassembled and maintained, which improves the oil supply stability and the convenience of component maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of fuel pump technology, specifically relating to a fuel pump flow control valve with a detachable anti-vortex guide. Background Technology

[0002] Fuel pump flow control valves are typically installed inside the fuel pump outlet line. By rotating the valve disc around its shaft, the flow cross section is changed, thereby continuously adjusting the fuel flow rate to match the fuel delivery requirements under different operating conditions.

[0003] When a flow control valve operates in a throttling manner, it is prone to forming vortex streets and low-pressure areas downstream of the valve, leading to problems such as pressure pulsation and cavitation wear. Currently, most small flow control valves in the fuel pump outlet line do not have a dedicated vortex-eliminating and flow-guiding structure; the few solutions that use a one-piece molded flow-guiding structure have non-detachable components, high maintenance costs, and the vortex-eliminating effect of conventional flat flow guides is limited. Therefore, there is an urgent need for a fuel pump flow control valve with a detachable vortex-eliminating and flow-guiding structure. Utility Model Content

[0004] This invention solves the problems mentioned in the background art by adding a detachable anti-vortex guide component to the downstream side of the valve disc of the fuel pump flow control valve. The guide plate with pressure equalization guide holes and sawtooth vortex breaking section disperses the vortex after the valve, equalizes the pressure after the valve, and suppresses cavitation damage.

[0005] The technical solution of this utility model is implemented as follows: a fuel pump flow control valve with detachable anti-vortex guide includes a valve disc and an adjusting shaft transversely passing through the center of the valve disc, and further includes: A vortex-eliminating and flow-guiding assembly is detachably disposed on the downstream side of the valve disc. The vortex-eliminating and flow-guiding assembly includes a mounting base that fits against the surface of the valve disc and a flow-guiding plate that is vertically disposed on the mounting base. The mounting base is detachably and fixedly connected to the valve disc by fasteners. The guide plate has pressure equalization and flow guiding holes that extend through both sides, and the downstream end of the guide plate has a sawtooth-shaped vortex-breaking section.

[0006] The present invention is further configured such that the fastener is a countersunk bolt, the mounting base is provided with a countersunk hole, and the head of the countersunk bolt is embedded in the countersunk hole.

[0007] The present invention is further configured such that multiple pressure equalization guide holes are provided, and the multiple pressure equalization guide holes are evenly arranged along the length direction of the guide plate.

[0008] The present invention is further configured such that the sawtooth-shaped vortex breaking part is a continuous arc wave tooth structure.

[0009] The present invention is further provided that the connection between the guide plate and the mounting base is provided with an arc transition reinforcement part.

[0010] The present invention is further configured such that a disc protrusion is provided on the downstream side of the valve disc, an adjusting shaft passes through the valve disc and the disc protrusion, and a positioning groove adapted to the shape of the disc protrusion is provided on the side of the mounting base facing the valve disc, and the positioning groove is sleeved on the outside of the disc protrusion.

[0011] By adopting the above technical solution, the beneficial effects that this utility model can achieve are: 1. By dividing the large-scale vortex after the valve through the guide plate, and cooperating with the pressure equalization guide hole to balance the pressure difference on both sides of the plate, and breaking the concentrated vortex at the tail edge of the sawtooth breaking part, the flow field and oil outlet pressure after the valve are stabilized, thus improving the oil supply stability.

[0012] 2. By using the anti-vortex and flow guiding components to raise the pressure in the low-pressure area after the valve, the precipitation of cavitation bubbles is reduced, the impact and wear of bubbles on the valve disc and pipeline are weakened, and the service life of the components is improved.

[0013] 3. The vortex-eliminating and flow-guiding components can be detached and installed using fasteners. The fitting of the disc protrusion and the positioning groove ensures assembly accuracy, facilitates individual disassembly and replacement, and improves maintenance convenience. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model; Figure 2 This is a three-dimensional structural schematic diagram of the vortex-eliminating and flow-guiding component of this utility model; Figure 3 This is a partially exploded view of the present invention.

[0015] The attached figures are labeled as follows: 1. Valve disc; 2. Adjusting shaft; 3. Anti-vortex guide assembly; 30. Mounting base; 31. Guide plate; 4. Fastener; 5. Pressure equalization guide hole; 6. Serrated vortex breaking section; 7. Countersunk hole; 8. Arc transition reinforcement section; 9. Disc protrusion; 10. Positioning groove. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 : Example: This embodiment provides a fuel pump flow control valve with a detachable anti-vortex guide, including a valve disc 1 and an adjusting shaft 2 transversely passing through the center of the valve disc 1, and further including: The vortex-eliminating and flow-guiding assembly 3 is detachably disposed on the downstream side of the valve disc 1. The vortex-eliminating and flow-guiding assembly 3 includes a mounting base 30 that is attached to the surface of the valve disc 1 and a flow-guiding plate 31 that is vertically disposed on the mounting base 30. The mounting base 30 is detachably and fixedly connected to the valve disc 1 by fasteners 4. The guide plate 31 has pressure equalization guide holes 5 that extend through both sides of the plate, and the downstream end of the guide plate 31 is provided with a sawtooth-shaped vortex-breaking part 6.

[0017] The fuel pump flow control valve with detachable anti-vortex guide provided in this embodiment is installed in the fuel pump outlet pipe and is used to adjust the fuel flow cross section to control the output flow rate, while improving the flow state of the fluid after the valve.

[0018] The flow regulating valve includes a valve disc 1 and an adjusting shaft 2. The valve disc 1 is a circular plate-shaped component, arranged laterally in the internal flow channel of the oil outlet pipe. A through shaft hole is opened at its center. On the downstream side of the valve disc 1 facing the fluid outflow direction, a disc protrusion 9 is integrally formed around the outer edge of the shaft hole. The disc protrusion 9 is an annular protrusion structure surrounding the shaft hole. The shaft hole passes through both the valve disc 1 body and the disc protrusion 9. The adjusting shaft 2 is a columnar component that passes horizontally into the shaft hole of the valve disc 1. The outer wall of the adjusting shaft 2 and the inner wall of the shaft hole adopt a flat shaft and flat hole matching structure, and the two are circumferentially fixed. The two ends of the adjusting shaft 2 are rotatably supported on the pipe wall of the oil outlet pipe. The outer end of the adjusting shaft 2 is connected to an external drive mechanism. When the external drive mechanism outputs torque, it can drive the adjusting shaft 2 to rotate around its own axis, thereby driving the valve disc 1 to deflect synchronously. By changing the angle between the valve disc 1 and the flow channel section, the flow clearance between the outer edge of the valve disc 1 and the pipe wall is adjusted, thereby realizing the regulation of the oil flow rate.

[0019] A separate anti-vortex and flow guiding assembly 3 is provided on the downstream side of the valve disc 1. This assembly consists of a mounting base 30 and a flow guide plate 31. The mounting base 30 is a long flat plate component, and its side facing the valve disc 1 is completely attached to the downstream disc surface of the valve disc 1. A blind groove-shaped positioning groove 10 is formed on the side of the mounting base 30 facing the valve disc 1. The inner contour of the positioning groove 10 is perfectly matched with the outer contour shape of the disc protrusion 9. During assembly, the positioning groove 10 is sleeved on the outside of the disc protrusion 9. The fit between the groove wall and the outer wall of the protrusion restricts the circumferential displacement of the mounting base 30 relative to the valve disc 1, thereby achieving assembly alignment. The mounting base 30 is detachably fixed to the valve disc 1 by fasteners 4. The fasteners 4 are countersunk bolts. A countersunk hole 7 is correspondingly formed on the mounting base 30. The countersunk hole 7 penetrates the mounting base 30 along the plate thickness direction, and its end facing the valve disc 1 is an enlarged conical receiving space. At least two sets of countersunk holes 7 are provided, evenly spaced along the length of the mounting base 30. After the shank of the countersunk bolt passes through the countersunk hole 7, it is screwed into the pre-set threaded hole on the valve disc 1 that corresponds to the countersunk hole 7. The mounting base 30 is pressed and fixed on the valve disc 1 by the thread engagement. The head of the countersunk bolt is completely contained in the conical space of the countersunk hole 7 and does not protrude from the surface of the mounting base 30, so as to avoid interfering with the fluid flow. The entire anti-vortex flow guide assembly 3 can be removed from the valve disc 1 by unscrewing the countersunk bolt in the opposite direction, so as to achieve individual disassembly and maintenance.

[0020] The guide plate 31 is a straight plate-shaped component, with its bottom integrally formed and connected to the plate surface of the mounting base 30 opposite to the valve disc 1. The plate surface of the guide plate 31 is perpendicular to the plate surface of the mounting base 30, and the entire plate extends downstream along the flow channel axis. Symmetrically arranged on both sides of the connection interface between the guide plate 31 and the mounting base 30 are arc-shaped transition reinforcement parts 8. These reinforcement parts are smooth, concave arc surfaces that fill the right angle between the root of the guide plate 31 and the plate surface of the mounting base 30, increasing the connection area, dispersing the load generated by fluid impact, and reducing stress concentration at the connection point. Multiple pressure equalization guide holes 5 are provided on the plate body of the guide plate 31. The pressure equalization guide holes 5 penetrate through both sides of the guide plate 31 along the thickness direction. The multiple pressure equalization guide holes 5 are evenly arranged along the length direction of the guide plate 31, and their arrangement avoids the base area corresponding to the countersunk hole 7 and the positioning groove 10. The fluid can flow between the two sides of the guide plate 31 through the pressure equalization guide holes 5, balancing the fluid pressure difference on both sides of the guide plate 31. At the same time, when the fluid passes through the holes, it will be sheared by the hole edges, further breaking down and refining the vortex. A sawtooth-shaped vortex-breaking part 6 is provided at the downstream end of the guide plate 31 away from the mounting base 30. This vortex-breaking part is composed of continuous arc-shaped wave teeth connected sequentially along the width direction of the guide plate 31, with the tooth tips facing the downstream direction of the fluid. When the fluid flows through the end of the guide plate 31, the wave teeth will divide the tail vortex formed at the tail of the guide plate 31 into multiple small fragmented vortices, accelerating the dissipation of vortex energy.

[0021] When the flow control valve is working, fuel flows from the fuel pump body into the outlet pipe and flows axially along the flow channel to the valve disc 1. The external drive mechanism drives the adjustment shaft 2 to rotate, causing the valve disc 1 to deflect to the corresponding angle, adjusting the flow clearance to match the flow requirements of the current operating condition. When the fuel passes through the throttling gap at the outer edge of the valve disc 1, the flow velocity increases and the pressure decreases. Boundary layer separation occurs during the flow process, forming a local low-pressure area on the back flow side of the valve disc 1 and generating large-scale vortices that periodically fall off. When the local pressure is too low, bubbles will precipitate. After the bubbles enter the downstream high-pressure area with the fluid, they collapse, forming impacts. Long-term action can easily cause cavitation wear between the valve disc 1 and the pipe wall. The periodically falling vortices will cause continuous pulsation of the outlet pressure, affecting the stability of the fuel supply. When fuel flows through the anti-vortex guide assembly 3, the vertically positioned guide plate 31 first divides the large main vortex into two parts, directly weakening the overall strength of the vortex street. The fluid on both sides of the guide plate 31 flows through the pressure equalization guide hole 5, balancing the pressure difference on both sides of the plate, reducing the generation of secondary vortices, and simultaneously refining the vortex clusters through secondary shearing. When the fluid flows to the end of the guide plate 31, the arc-shaped wave teeth of the sawtooth vortex breaking part 6 break the concentrated tail vortex into multiple sets of lower-energy fine vortex clusters, avoiding fluid excitation caused by periodic tail vortices. After multi-stage anti-vortex action, the pressure distribution in the downstream area is more uniform, the amplitude of the low-pressure area is reduced, which can reduce the precipitation of cavitation bubbles, weaken the impact of bubbles on the valve disc 1 and the pipe wall, and reduce the pulsation amplitude of the oil outlet pressure. When the anti-vortex guide assembly 3 is worn or blocked, there is no need to disassemble the basic structure of the valve disc 1 and the adjusting shaft 2. The entire assembly can be removed for replacement or cleaning simply by unscrewing the countersunk bolts, making maintenance easy.

[0022] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A fuel pump flow control valve with detachable anti-vortex guide, comprising a valve disc (1) and an adjusting shaft (2) transversely passing through the center of the valve disc (1), characterized in that, Also includes: The vortex-eliminating and flow-guiding assembly (3) is detachably disposed on the downstream side of the valve disc (1). The vortex-eliminating and flow-guiding assembly (3) includes a mounting base (30) that fits against the surface of the valve disc (1) and a flow guide plate (31) that is vertically disposed on the mounting base (30). The mounting base (30) is detachably and fixedly connected to the valve disc (1) by fasteners (4). The guide plate (31) has pressure equalization guide holes (5) that run through both sides of it, and the downstream end of the guide plate (31) has a sawtooth vortex breaking section (6).

2. A fuel pump flow control valve with detachable anti-vortex guide according to claim 1, characterized in that, The fastener (4) is a countersunk bolt, and the mounting base (30) has a corresponding countersunk hole (7), with the head of the countersunk bolt embedded in the countersunk hole (7).

3. A fuel pump flow control valve with detachable anti-vortex guide according to claim 1, characterized in that, Multiple equalizing guide holes (5) are provided, and the multiple equalizing guide holes (5) are evenly arranged along the length direction of the guide plate (31).

4. A fuel pump flow control valve with detachable anti-vortex guide according to claim 1, characterized in that, The sawtooth-shaped vortex section (6) is a continuous circular arc wave tooth structure.

5. A fuel pump flow control valve with a detachable anti-vortex guide according to claim 1, characterized in that, The connection between the guide plate (31) and the mounting base (30) is provided with an arc transition reinforcement part (8).

6. A fuel pump flow control valve with a detachable anti-vortex guide according to claim 1, characterized in that, The valve disc (1) has a disc protrusion (9) on its downstream side. The adjusting shaft (2) passes through the valve disc (1) and the disc protrusion (9). The mounting base (30) has a positioning groove (10) on the side facing the valve disc (1) that matches the shape of the disc protrusion (9). The positioning groove (10) is fitted onto the outside of the disc protrusion (9).

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