Salt spray test bench for automobile water pump
By installing a drainage mechanism and pressure regulating components in the automotive water pump salt spray test bench, and using a motor and gear transmission system to control the suction and regulation of the sealed water, the overflow problem caused by the rise of the liquid level in the sealing tank was solved, and the stability and accuracy of the test were achieved.
Patent Information
- Application Number
- CN202520418508.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-11
AI Technical Summary
The existing salt spray test bench causes the liquid level in the sealing tank to rise under pressure difference, resulting in the overflow of the sealing water and affecting the test results.
A salt spray test bench for automotive water pumps was designed. By setting up a drainage mechanism and a pressure regulating component, the suction piston and pressure regulating piston are controlled by a drive motor and gear transmission system to keep the sealed water body within a certain range, regulate the internal and external pressure difference, and prevent the sealed water body from overflowing.
It effectively prevents the sealed water from overflowing due to pressure difference changes, maintains the sealing effect, and ensures the stability and accuracy of salt spray testing.
Smart Images
Figure CN223781636U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to salt mist testing machine technical field, concretely is a kind of automobile water pump salt mist test bench. BACKGROUND
[0002] The main reason for the salt mist test of automobile water pump is to evaluate its corrosion resistance and reliability in harsh environments. Salt mist test simulates marine or salt-containing humid environment to evaluate the performance of water pump under salt mist corrosion conditions, to ensure its long-term stable operation in actual use.
[0003] The salt mist test bench evaluates the corrosion resistance of materials by simulating salt mist environment. The water seal along the designed sealing groove on the test bench box ensures that salt mist does not leak to the outside environment. However, during the test, there is a pressure difference between the inside and outside of the salt mist test bench, causing the liquid level on the outside of the tank cover to be higher than that on the inside. The continuous entry of salt mist droplets into the water seal in the sealing groove will gradually raise the liquid level in the sealing groove, causing the water seal to overflow from the outside of the tank cover. SUMMARY
[0004] (I) Technical problem solved
[0005] To overcome the shortcomings of the prior art, the utility model provides an automobile water pump salt mist test bench, which solves the problems raised in the above background.
[0006] (II) Technical solution
[0007] To achieve the above purpose, the utility model realizes the following technical solutions:
[0008] An automobile water pump salt mist test bench, comprising a test bench body, a sealing cover and a salt mist generating device. A water seal ring groove is formed along the upper edge of the test bench body. The lower edge of the sealing cover is buckled into the water seal ring groove. A sealing water body is arranged between the water seal ring groove and the lower edge of the sealing cover. The bottom wall of the water seal ring groove is provided with a water inlet and a drain outlet. A drain mechanism is connected to the drain outlet. The drain mechanism includes a drain vertical pipe, a mounting seat plate, a suction cavity and a drain pipe. The upper end of the drain vertical pipe is communicated with the drain outlet. The mounting seat plate is fixed on the side wall of the test bench body. The suction cavity is fixed on the mounting seat plate. The lower end of the drain vertical pipe is communicated with the suction cavity. The drain pipe is connected to the lower end of the suction cavity. A sealing valve body 9 is installed in the middle of the drain pipe.
[0009] Preferably, a suction piston is slidably installed in the suction cavity, a suction cavity is formed between the suction piston and the lower side of the suction cavity, the vertical drainage pipe is communicated with the suction cavity, the upper end of the suction piston is connected with a driving screw, a suction gear is rotatably connected to the mounting plate, a threaded hole is formed in the middle of the suction gear, the suction gear is sleeved on the driving screw in the threaded hole, a driving motor is mounted on the mounting plate, a transmission gear is connected to the output end of the driving motor, and the transmission gear is meshed with the suction gear.
[0010] Preferably, a plurality of guide strips are arranged on the inner wall of the suction cavity, and a guide groove is arranged on the outer edge of the suction piston.
[0011] Preferably, a limiting block is arranged on the mounting plate, the driving screw is slidably arranged on the limiting block, a mounting groove is formed in the middle of the limiting block, and the mounting groove is rotatably connected in the mounting groove.
[0012] Preferably, a pressure regulating cylinder is communicated with the middle of the vertical drainage pipe, a through hole for communicating the inside of the test bench body with the environment outside the wall is formed in the side wall of the test bench body, the pressure regulating cylinder is fixed in the through hole, a partition plate is fixed in the middle of the pressure regulating cylinder, a pressure regulating assembly is slidably installed in the pressure regulating cylinder, the pressure regulating assembly comprises a sliding rod and pressure regulating pistons at both ends of the sliding rod, the sliding rod is slidably arranged through the partition plate, the pressure regulating pistons are slidably installed in the pressure regulating cylinder, a pressure regulating cavity is formed between the pressure regulating pistons on the outside and the partition plate, and the pressure regulating cavity is communicated with the vertical drainage pipe.
[0013] Preferably, a reset spring is connected between the pressure regulating pistons on the inside and the partition plate.
[0014] (Three) beneficial effects
[0015] The utility model provides a kind of automobile water pump salt fog test bench.It has the following beneficial effects:
[0016] 1, in the utility model, in the process of salt fog test, sealing valve body 9 separates drainage vertical pipe, pressure regulating cylinder, suction cavity and drain pipe into sealed suction space, driving motor can make suction piston slide up and down in suction cavity by gear transmission, to form negative pressure, water in water seal ring groove is gradually sucked into suction cavity, so that the sealed water body in water seal ring groove is always kept in a certain range, avoid causing salt fog droplet to continuously dissolve into sealed water body and cause overflow.
[0017] 2, the utility model discloses the pressure regulating cylinder body is connected with the inside and the outer wall environment of communicating test table body through the through -hole, makes the pressure difference of two ends pressure regulating piston inside and outside and the pressure difference of the sealed water body of both sides of sealing cover inside and outside keep consistent, when the pressure difference of both sides increases, the pressure regulating assembly whole moves outward, makes the pressure regulating cavity increase, and the sealed water body in water seal ring groove is inhaled into the pressure regulating cavity, so that the liquid level difference of the sealed water body in water seal ring groove is reduced, when the pressure difference of both sides increases, the sealed water body of pressure regulating cavity can be extruded back to water seal ring groove under the action of reset spring, always keep the liquid level of sealed water body in a certain range, avoid the appearance salt fog leakage. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the structural diagram of the utility model a kind of automobile water pump salt fog test table;
[0019] Figure 2 It is the sectional view of the utility model salt fog test table;
[0020] Figure 3 It is the structural diagram of the utility model drainage mechanism;
[0021] Figure 4 It is the sectional view of the utility model drainage mechanism.
[0022] In the drawing: 1, test table body;2, sealing cover;3, salt fog generating device;4, water seal ring groove;5, drainage vertical pipe;6, mounting seat plate;7, suction cavity cylinder;8, drain pipe;9, sealing valve body;10, pressure regulating cylinder body;11, suction piston;12, drive screw;13, limit block;14, suction gear;15, drive motor;16, transmission gear;17, partition sheet;18, sliding rod;19, pressure regulating piston;20, reset spring. DETAILED DESCRIPTION
[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model.
[0024] The utility model embodiment provides a kind of automobile water pump salt fog test table, such as Figures 1-4As shown, including test bench body 1, sealing cover 2 and salt spray generating device 3, the rear side of the sealing cover 2 is rotatably connected to the upper side of the test bench body 1, the upper edge of the test bench body 1 is provided with a water seal ring groove 4, the lower edge of the sealing cover 2 is buckled in the water seal ring groove 4, a sealing water body is arranged between the water seal ring groove 4 and the lower edge of the sealing cover 2, a liquid level sensor is installed on the outer side wall of the sealing ring groove 4, when the sealing cover 2 is buckled in the water seal ring groove 4, the sealing water body is blocked between the water seal ring groove 4 and the lower edge of the sealing cover 2 to form a liquid seal, so as to achieve the purpose of sealing, the sealing water body forms a U-shaped structure between the sealing cover 2 and the water seal ring groove 4, during the salt spray test, when the salt spray is continuously sprayed, according to the different spraying speeds, different pressure differences will be formed inside and outside the test bench body 1, the high pressure will push the water body outward, so that the liquid level difference is formed on both sides of the U-shaped structure of the sealing water body, when the pressure difference reaches a certain value, the sealing water body on the outside will be extruded and overflowed, and during the long test process, the salt spray droplets will continuously dissolve and drip into the sealing water body, increase the volume of the sealing water body, and also cause the overflow of the sealing water body.
[0025] In order to avoid the overflow caused by the fact that the salt spray droplets continuously dissolve and drip into the sealing water body and increase the volume of the sealing water body, the utility model is provided with a water inlet and a drain outlet in the bottom wall of the water seal ring groove 4, a drainage mechanism is connected to the drain outlet, the drainage mechanism includes a drainage vertical pipe 5, a mounting base plate 6, a suction cavity 7 and a drain pipe 8, the upper end of the drainage vertical pipe 5 is communicated with the drain outlet, the mounting base plate 6 is fixed on the side wall of the test bench body 1, the suction cavity 7 is fixed on the mounting base plate 6, the lower end of the drainage vertical pipe 5 is communicated with the suction cavity 7, the drain pipe 8 is connected to the lower end of the suction cavity 7, a sealing valve body 9 and a drain pump are installed in the middle part of the drain pipe 8, during the test process, the sealing valve body 9 is in a closed state, and the drainage vertical pipe 5, the pressure regulating cylinder body 10, the suction cavity 7 and the drain pipe 8 are separated into a sealed suction space.
[0026] As Figures 3-4As shown, the inner wall of the suction cavity 7 is provided with a plurality of guide strips, the suction piston 11 is slidingly installed in the suction cavity 7, the outer edge of the suction piston 11 is provided with a guide groove, the guide strips slidingly pass through the guide groove, and the guide groove and the guide strips cooperate with each other to enable the suction piston 11 to only vertically slide up and down in the suction cavity, a suction cavity is formed between the suction piston 11 and the lower side of the suction cavity 7, the drainage vertical pipe 5 communicates with the suction cavity, the upper end of the suction piston 11 is connected with a drive screw 12, the mounting seat plate 6 is provided with a limiting block 13, the drive screw 12 slidingly passes through the limiting block 13, the middle part of the limiting block 13 is provided with a mounting groove, the mounting groove is rotatably connected with a suction gear 14, the limiting block 13 can limit the upper and lower sides of the suction gear 14, so that the suction gear 14 can only rotate in the mounting groove, the middle part of the suction gear 14 is provided with a threaded hole, the suction gear 14 is threadedly connected on the drive screw 12, the mounting seat plate 6 is provided with a drive motor 15, the liquid level sensor is electrically connected with the drive motor 15, the output end of the drive motor 15 is connected with a transmission gear 16, the transmission gear 16 and the suction gear 14 are meshed with each other, the drive motor 15 drives the suction gear 14 to rotate through the transmission gear 16, so that the suction gear 14 and the drive screw 12 can realize the up and down sliding of the suction piston 11 in the suction cavity 7, the liquid level sensor can detect and control the drive motor 15 to generate negative pressure to suck the sealing water in the water seal ring groove 4 into the suction cavity, so as to always keep the overall volume of the sealing water in the water seal ring groove 4, avoid the overflow caused by the increase of the volume of the sealing water, and increase the volume of the sealing water.
[0027] In order to avoid the sealing water extrusion caused by the pressure difference reaching a certain value, the utility model discloses, the vertical pipe 5 middle part of drainage is connected with pressure regulating cylinder 10, the through -hole that is used for connecting test bench body 1 inside and outer wall environment is set up on the lateral wall of test bench body 1, and pressure regulating cylinder 10 is fixed in the through -hole, the middle part of pressure regulating cylinder 10 is fixed with the partition sheet 17, pressure regulating assembly is slidably installed in pressure regulating cylinder 10, pressure regulating assembly includes slip rod 18 and pressure regulating piston 19 of slip rod 18 both ends, slip rod 18 slips and is equipped through the partition sheet 17, pressure regulating piston 19 is slidably installed in pressure regulating cylinder 10, and the pressure regulating piston 19 between outside and partition sheet 17 forms pressure regulating cavity, the pressure regulating piston 19 between inside and partition sheet 17 is connected with return spring 20, the pressure regulating cavity is connected with drainage vertical pipe 5, through above-mentioned technical scheme, the inside and outside of pressure regulating cylinder 10 are connected with test bench body 1 inside and outside environment respectively, make the pressure difference that both sides of pressure regulating piston 19 bear and the inside and outside pressure difference of the sealing water body in water seal ring groove 4 keep consistent, when the inside and outside pressure difference is big, pressure will push the sealing water body in water seal ring groove 4 to outside, so that the liquid level height of outside is elevated, and pressure regulating assembly whole moves outward simultaneously, and pressure regulating cavity increases, and part of sealing water body is temporarily sucked into pressure regulating cavity, and the volume of sealing water body in water seal ring groove 4 is reduced, avoid the sealing water body overflow caused by the pressure difference being too big, always keep the sealing water body liquid level height of outside in a certain range, when the pressure difference is reduced, part of sealing water body in pressure regulating cavity is extruded back to water seal ring groove 4 under the action of return spring 20, keep the overall volume of sealing water body in water seal ring groove 4 unchanged, so as to play the buffering effect.
[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. An automotive water pump salt spray test bench comprising a test bench body, a sealing cover and a salt spray generating device, characterized in that: The upper edge of the test bench body is provided with a water seal ring groove, the lower edge of the sealing cover is buckled in the water seal ring groove, a sealing water body is arranged between the water seal ring groove and the lower edge of the sealing cover, the bottom wall of the water seal ring groove is provided with a water inlet and a drain outlet, a drainage mechanism is connected to the drain outlet, the drainage mechanism comprises a drainage vertical pipe, a mounting seat plate, a suction cavity and a drain pipe, the upper end of the drainage vertical pipe is communicated with the drain outlet, the mounting seat plate is fixed on the side wall of the test bench body, the suction cavity is fixed on the mounting seat plate, the lower end of the drainage vertical pipe is communicated with the suction cavity, the drain pipe is connected to the lower end of the suction cavity, and a sealing valve body is mounted in the middle of the drain pipe.
2. The automotive water pump salt spray test bench according to claim 1, characterized in that: A suction piston is slidably installed in the suction cavity, a suction cavity is formed between the suction piston and the lower side of the suction cavity, the drainage vertical pipe is communicated with the suction cavity, the upper end of the suction piston is connected with a drive screw, a suction gear is rotatably connected to the mounting seat plate, a threaded hole is formed in the middle of the suction gear, the suction gear is sleeved on the drive screw in the threaded hole, a drive motor is mounted on the mounting seat plate, the output end of the drive motor is connected with a transmission gear, and the transmission gear and the suction gear are meshed with each other.
3. The automotive water pump salt spray test bench of claim 2, wherein: A plurality of guide strips are arranged on the inner wall of the suction cavity, and a guide groove is arranged on the outer edge of the suction piston.
4. The automotive water pump salt spray test bench of claim 2, wherein: A limiting block is arranged on the mounting seat plate, the drive screw is slidably arranged on the limiting block, a mounting groove is formed in the middle of the limiting block, and the mounting groove is rotatably connected in the mounting groove.
5. The automotive water pump salt spray test bench of claim 4, wherein: A pressure regulating cylinder is communicated in the middle of the drainage vertical pipe, a through hole is formed in the side wall of the test bench body for communicating the inside of the test bench body with the environment outside the wall, the pressure regulating cylinder is fixed in the through hole, a partition plate is fixed in the middle of the pressure regulating cylinder, a pressure regulating assembly is slidably installed in the pressure regulating cylinder, the pressure regulating assembly comprises a sliding rod and pressure regulating pistons at both ends of the sliding rod, the sliding rod is slidably arranged through the partition plate, the pressure regulating pistons are slidably installed in the pressure regulating cylinder, a pressure regulating cavity is formed between the pressure regulating pistons on the outside and the partition plate, and the pressure regulating cavity is communicated with the drainage vertical pipe.
6. The automotive water pump salt spray test bench of claim 5, wherein: The pressure regulating pistons on the inside are connected with a return spring between the partition plate.