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CN-115854074-B - Friction-free gap type fluid flow controller

CN115854074BCN 115854074 BCN115854074 BCN 115854074BCN-115854074-B

Abstract

The invention discloses a friction-free gap type fluid flow controller which comprises a shell and a flow control assembly, wherein a plurality of fluid outlets are formed in the side face and the bottom face of the shell, the flow control assembly is arranged in the shell, the flow control assembly comprises a central shaft, an upper end face, a lower end face and side baffles, the upper end face and the lower end face are respectively arranged at the upper end and the lower end of the central shaft, the side baffles are arranged between the upper end face and the lower end face, the width of each side baffle is larger than that of each fluid outlet, the upper end and the lower end of the central shaft are rotatably connected with the shell, and gaps exist between the side baffles and the inner wall of the shell. The flow control assembly is designed, a gap exists between the side baffle plate and the inner wall of the shell, friction is avoided, the service life is prolonged, foreign matters of the cooling system can directly pass through the gap and cannot be blocked, and compared with the prior art, high-value parts such as springs, sealing elements and the like are omitted.

Inventors

  • ZHU HONGWEI
  • BAO XIAOYANG
  • Ge Chenrui
  • LIU ZHIYANG
  • LU JIANSHAN

Assignees

  • 金华氢途科技有限公司

Dates

Publication Date
20260505
Application Date
20221124

Claims (6)

  1. 1. The friction-free gap type fluid flow controller is characterized by comprising a shell (1) and a flow control assembly (2), wherein a plurality of fluid outlets (11) are formed in the side face and the bottom face of the shell (1), the flow control assembly (2) is arranged in the shell (1), the flow control assembly (2) comprises a central shaft (21), an upper end face (22), a lower end face (23) and side baffles (24), the upper end face (22) and the lower end face (23) are respectively arranged at the upper end and the lower end of the central shaft (21), the side baffles (24) are arranged between the upper end face (22) and the lower end face (23), the width of the side baffles (24) is larger than that of the fluid outlets (11), the upper end and the lower end of the central shaft (21) are in rotary connection with the shell (1), and gaps (5) exist between the side baffles (24) and the inner wall of the shell (1); The upper end face (22) and the lower end face (23) are of circular or fan-shaped structures, and a plurality of flow gaps (231) are formed in the lower end face (23); The side baffle (24) is of a circular ring structure, a plurality of fluid openings (241) are formed in the side baffle (24), and the fluid outlet (11) can be adjusted by rotating the fluid openings (241).
  2. 2. The friction-free gap type fluid flow controller according to claim 1, wherein a top cover (3) is arranged at the top of the shell (1), a through hole (31) is formed in the center of the top cover (3), the upper end of the central shaft (21) penetrates through the through hole (31), an oil seal (26) is arranged between the through hole and the upper end of the central shaft (21), a sealing ring is arranged between the top cover and the shell (1), and the top cover (3) is detachably connected with the shell (1).
  3. 3. The friction-free gap type fluid flow controller according to claim 1, wherein the upper and lower ends of the central shaft (21) are connected with the housing (1) by bearings (25).
  4. 4. The friction-free gap type fluid flow controller according to claim 1, wherein three fluid outlets (11) are formed in the side face of the housing (1), one fluid outlet (11) is formed in the bottom face of the housing (1), and the directions of the openings of the adjacent fluid outlets (11) are different by 90 degrees.
  5. 5. The friction-free gap type fluid flow controller according to claim 1, wherein the fluid outlet (11) is provided with a water outlet assembly (4), and the fluid outlets (11) are all identical in structural dimension.
  6. 6. The friction-free gap type fluid flow controller according to claim 1, wherein a mounting panel (12) for mounting is provided on a side surface of the housing (1).

Description

Friction-free gap type fluid flow controller Technical Field The invention relates to the technical field of fuel cells, in particular to a friction-free clearance type fluid flow controller. Background At present, a hydrogen fuel cell cooling system and an electric automobile basically adopt a ball valve controlled by a motor to control the flow and the switch of cooling liquid, the basic principle of the hydrogen fuel cell cooling system and the ball valve for common household use are the same as those of the ball valve for common household use, and generally, components adopt PA66, PPS and PPA high-level engineering materials to dynamically seal PTFE materials with stronger temperature adaptability, so that the requirements are met by stricter tolerance fit control; the ball valve has the characteristics of small flow resistance and simple structure, but the sealing performance, the opening torque and the service life of the ball valve in a cooling system are far higher than those of other industries, particularly in a hydrogen fuel cell, because the control mode of the ball valve needs frequent rotation to adjust the flow, the ball valve is severely worn. The key technology is that the dynamic seal is used for compensating how to seal and how to compensate the impossible abrasion in the rotating process, the existing products in the market adopt PTFE seal, the stainless steel ring frame increases the strength to avoid the deformation of PTFE seal elements, and the titanium alloy plate spring compensates the abrasion of the PTFE seal rings. Due to space limitation, the stainless steel is not enough in elasticity, but under the condition of stacking materials and parts, the service life of the stainless steel can only be ensured to be 60000 km in 3 years, the time and the labor are wasted during replacement, the cooling liquid is required to be replenished, and the cost is high; The working principle and the sealing scheme of different manufacturers of the existing product are basically the same, a hard sealing material made of PTFE material is adopted to seal by wrapping a ball body by a bread in a profiling mode, a plate spring is used for carrying out abrasion compensation on a sealing element, and one or more O-shaped sealing rings are adopted at other positions where leakage is likely to occur. The ball and PTFE material sealing part is one surface, and the motor driving shaft rotates to control the flow and the switch of the fluid. The prior art has the disadvantages that if the sealing surface is large and foreign matters enter the sealing surface in an automobile cooling system, leakage, clamping stagnation, large quantity of sealing elements, complex structure, incapability of accurately controlling opening force and torque, abrasion caused by high-frequency opening and closing in an automobile, overlarge opening torque caused by overlarge spring force value and overlarge force value, and incapability of ensuring consistency of left and right abrasion, and further uneven abrasion caused by valve rods. In a word, the greatest problem is that the adopted compression produces sealing, the friction value is determined by the surface roughness and the force value contacted with the surface roughness, the compression produces sealing, the design must ensure a compression value, the sealing surface is a force value, the force value cannot be further optimized, leakage can be caused by the reduction of the force value, in the actual working process, the real sealing cannot be realized due to the rotation between PTFE and a ball, the leakage amount of the product on the market can only be ensured to be lower than 3L/min at most at present, and the product cannot be used for controlling gas under a gas path because the dry sealing accelerates the abrasion of the product. The existing product is a product which is improved based on the traditional valve, the whole design process is based on finding problems, solving the problems, finding out and solving the problems again, the accumulation of product parts can embody the point, the leakage after the abrasion is found, the spring is used for compensation, the stainless steel spring force value is insufficient, the titanium alloy is used instead, the PTFE sealing element is unevenly stressed due to the adoption of the spring, and particularly the PTFE sealing element is easy to deform under a high-temperature working environment, the stainless steel ring frame is further added, the stainless steel ring frame can meet the edge shell, abnormal sound is caused, and then a circle of rubber ring is added to the stainless steel ring frame. Disclosure of Invention The present invention is directed to a friction-free clearance type fluid flow controller that overcomes the deficiencies of the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: The application discloses a friction-free gap type fluid flow