Mechanical supercharging mechanism for hydraulic tappet sinking and leaking experiment

Abstract

The utility model provides a hydraulic tappet sinking and leaking experiment mechanical supercharging mechanism which is composed of a rack, a hydraulic cylinder body, a supercharging piston, a driving piston, a counterweight column, an air cylinder, an electromagnetic valve and the like, the hydraulic cylinder body and the air cylinder are installed on the rack, the supercharging piston and the driving piston are installed inside the hydraulic cylinder body, and the lower portion of the counterweight column is connected with the driving piston. The upper part is connected with the air cylinder through a T-shaped connecting body; the hydraulic cylinder body is of a double-cylinder communication structure, the upper part is a small-diameter master cylinder, the lower part is a large-diameter pressure cylinder, the master cylinder and the pressure cylinder are communicated through a middle communication hole, and gettering grooves are formed in the bottoms of the master cylinder and the pressure cylinder. According to different processes, the balance weight column can be replaced to be compatible with products of different specifications for experiments, the experiment pressure is constant, and experiment errors caused by pressure fluctuation of an air source can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hydraulic tappet sinking discharge experimental mechanical pressurizing mechanism, which is suitable for the sinking discharge experiment of hydraulic tappet, detects whether the function of hydraulic tappet is qualified, belongs to the technical field of mechanical manufacturing. TECHNICAL BACKGROUND

[0002] There are various experimental detection devices for products in manufacturing industry, and hydraulic tappet for valve in automobile engine is not exceptional. For hydraulic tappet, sinking discharge characteristic experiment is an important reference index for detecting whether it is qualified, so sinking discharge test bench is also an important detection device for hydraulic tappet manufacturers. SUMMARY

[0003] The utility model discloses a kind of hydraulic tappet sinking discharge experimental mechanical pressurizing mechanism, which can satisfy different specifications of hydraulic tappet to carry out sinking discharge characteristic experiment, and experimental pressure is constant, can effectively avoid the experimental error caused by air source pressure fluctuation under factory environment;Based on the mechanism, tappet manufacturer can also assemble multiple-channel sinking discharge test bench according to actual needs.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of hydraulic tappet sinking discharge experimental mechanical pressurizing mechanism, including rack, hydraulic cylinder body, pressurizing piston, driving piston, counterweight column, cylinder, solenoid valve, hydraulic cylinder body and cylinder are installed on rack, pressurizing piston and driving piston are installed inside hydraulic cylinder body, counterweight column is connected with driving piston below, and upper part is connected with cylinder by "T" type connecting body.

[0005] Preferably, the hydraulic cylinder body is a double-cylinder communication structure, the upper part is a small-diameter driving cylinder, and the lower part is a large-diameter pressurizing cylinder, which are communicated through the communication hole in the middle. The driving cylinder and the pressurizing cylinder are both arranged with gas removal grooves at the bottom to facilitate the machining of the hydraulic cylinder body.

[0006] Preferably, the pressurizing piston is a multi-stage rod hammer structure, the head is designed with a sealing ring groove, and each stage connecting part is designed with a small-diameter fillet to enhance the strength of the part and prevent stress concentration.

[0007] Preferably, the middle and lower parts of the counterweight column are designed as hollow structures, which are adapted in size to the hydraulic cylinder body to save space. The upper part is designed with an inverted "T" type groove, which is connected with the cylinder through a "T" type connecting body. This design can effectively avoid abnormal wear of the driving piston caused by misalignment of the cylinder and the hydraulic cylinder body during installation.

[0008] Preferably, the cylinder is a standard cylinder, and the solenoid valve is a two-position three-way solenoid valve. The pneumatic combination function is free during experiment to ensure constant experimental pressure, and the counterweight column is lifted to maintain high position at other times.

[0009] Compared with the prior art, the utility model discloses the beneficial effects are: 1. according to the process is different, through the replacement of counterweight column can be compatible with different specifications product and carry out the experiment;2. the mechanism can realize the small force (mainly the counterweight column gravity) input of initiative piston end, and the big force (experimental pressure) output of pressure increasing piston end;3. experimental pressure is constant, avoids the experimental error caused because of gas source pressure fluctuation. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure schematic diagram of the utility model; Figure 2 It is hydraulic cylinder body view; Figure 3 It is pressure increasing piston view; Figure 4 It is counterweight column view.

[0011] In the drawing: 1-stand, 2-hydraulic cylinder body, 3-pressure increasing piston, 4-initiative piston, 5-counterweight column, 6-" T " type connector, 7-cylinder, 8-solenoid valve, 9-frock seat, 10-hydraulic tappet, 201-hydraulic oil, 301-pressure increasing piston sealing ring, 401-initiative piston sealing ring, A2-initiative cylinder, B2-pressure increasing cylinder, C2-initiative cylinder gas removal groove, D2-pressure increasing cylinder gas removal groove, E2-communication hole, A3-sealing ring groove, B3-small diameter fillet, A5-inverted " T " type groove. DETAILED DESCRIPTION

[0012] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0013] As Figure 1 Shown, stand (1) is divided into three layers: top layer arrangement cylinder (7), is vertically fixed on the platform by bolt, solenoid valve (8) is directly installed on cylinder (7);Middle layer arrangement main pressure increasing mechanism, the pressure increasing cylinder (B2) of hydraulic cylinder body (2) is downward, installs pressure increasing piston (3) and pressure increasing piston sealing ring (301), with bolt, hydraulic cylinder body (2) is fixed on the platform, pressure increasing piston (3) moves to top, adds proper amount of hydraulic oil (201) in the cylinder, after exhausting air, installs initiative piston (4) and initiative piston sealing ring (401), then installs counterweight column (5), bolt is fixed on initiative piston (3) top, " T " type connector (6) is pushed into inverted " T " type groove (A5) of counterweight column (5), " T " type connector (6) is screwed into cylinder (7) axle, nut is tight;The bottom layer is operation platform, for placing frock seat (9) and hydraulic tappet (10) and operating sink characteristic test.

[0014] The principle of pressure boosting: after the pressure boosting cylinder (B2) of the hydraulic cylinder (2) is communicated with the driving cylinder (A2) through the communication hole (E2), the hydraulic oil (201) in the hydraulic cylinder (2) has the same pressure at any position; the gravity of the driving piston (4) and the counterweight column (5) is G, the radius of the driving cylinder (A2) is r, the radius of the pressure boosting cylinder (B2) is R, and the experimental pressure is F; according to the pressure formula, G / πr 2 =F / πR 2 Therefore, the experimental pressure is F*R / r

[0015] In use, the electromagnetic valve (8) is powered on, the air cylinder (7) is in a free state, the counterweight column (5) presses the hydraulic oil (201) through the driving piston (4), the pressure boosting piston (3) moves downward, and the experimental pressure is output to perform the sinking and discharging characteristic test of the hydraulic tappet (10); after the test is completed, the electromagnetic valve (8) is powered off, the air cylinder (7) drives the counterweight column (5) to move upward, and the whole mechanism returns to the initial lifting state.

[0016] 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. A hydraulic tappet deactivation test machine supercharging mechanism characterized by: The hydraulic cylinder (2) and the air cylinder (7) are installed on the rack (1), the booster piston (3) and the driving piston (4) are installed inside the hydraulic cylinder (2), the weight column (5) is connected with the driving piston (4) below and connected with the air cylinder (7) through the "T" type connecting body (6) above.

2. The hydraulic tappet depleting test mechanical supercharging mechanism according to claim 1, characterized in that: The hydraulic cylinder (2) is a double-cylinder communication structure, the upper part is a small-diameter driving cylinder (A2), the lower part is a large-diameter booster cylinder (B2), and the driving cylinder (A2) is communicated through the middle communication hole (E2), the bottom of the driving cylinder (A2) is provided with a driving cylinder gas removal groove (C2), and the bottom of the booster cylinder (B2) is provided with a booster cylinder gas removal groove (D2).

3. The hydraulic tappet depleting test mechanical supercharging mechanism according to claim 1, characterized in that: The booster piston (3) is a multi-stage rod hammer structure, the head is designed with a sealing ring groove (A3), and each stage connecting part is designed with a small-diameter round corner (B3).

4. The hydraulic tappet depleting test mechanical supercharging mechanism of claim 1, wherein: The middle and lower parts of the weight column (5) are designed as a hollow structure, and the upper part is designed with an inverted "T" type groove (A5).

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