CN203704854U - Valve seating radial offset measurement device - Google Patents

Abstract

The utility model discloses a valve seating radial offset measurement device which comprises a valve, a cylinder cover, a dial gauge, a strain gauge, a screw elevator, a fixed bench, a bridge box, a strain meter and a host machine. The valve is arranged on the cylinder cover which is fixed on the fixed bench. The forward direction of a valve end is provided with the screw elevator. The strain gauge is pasted at the neck of the valve and is connected to the strain meter through the bridge box. The strain meter is in signal connection with the host machine. The dial gauge presses against the top end side of the valve. According to the valve seating radial offset measurement device, only a simple experiment device is needed, radial force is exerted to an engine valve, the relation curve of voltage and offset is made through data analysis, the voltage value of the strain gauge is obtained through a valve free seating experiment, thus the offset of the valve seating is calculated, the calculation of the valve seating radial offset is completed, and an experiment requirement is achieved.

Description

Air valve drop radial deflection measurement mechanism

Technical field

The utility model belongs to engine detection technique field, relates to a kind of engine valve radial deflection measurement mechanism of taking a seat.

Background technology

Engine valve is the vitals of engine valve actuating mechanism, the opening and closing of its timing, guarantee engine at work timing suck fresh combustion mixture for cylinder, and in time the waste gas after burning is discharged to cylinder, its whether reliable performance that directly affects engine.Especially along with the development of engine technology, the pressure in cylinder increases, the increase of rotating speed, and the seating velocity of valve is often very high.But owing to being gapped between valve and cylinder cap, so can there is radial deflection when air valve drop, there is valve eccentric phenomena in this, valve is produced to very large impulsive force can make to take a seat time.Thereby cause the problem of valve excessive wear and valve fracture, therefore, need to carry out analysis of experiments to the engine valve radial deflection of taking a seat.

At present, take a seat in the experiment of radial deflection measuring engine valve, not the relative utilization of a unification get up easily and fast obtain the take a seat experiment table of radial deflection of engine valve, be unfavorable for the analysis and research of valve radial deflection.

Summary of the invention

The utility model object is to overcome above-mentioned deficiency, provides that a kind of cost is low, efficiency is high, the engine valve radial deflection measurement mechanism of taking a seat intuitively comprehensively.What the utility model was measured is engine valve is while taking a seat, the radial deflection of valve.

The utility model is by the following technical solutions:

The utility model comprises valve, cylinder cover, clock gauge, foil gauge, screw-threaded shaft elevator, fixed rack, bridge box, strainmeter and host computer.

Valve is arranged on cylinder cover, and cylinder cover is fixed on fixed rack, is provided with screw-threaded shaft elevator in the forward side of valve end, posts foil gauge at the neck neck place of valve, and foil gauge is connected to strainmeter by bridge box, and strainmeter is connected with host computer signal; Clock gauge heads on the top sidewall of valve.

Compared with prior art, the beneficial effects of the utility model are:

1, the utility model, by the process of simulation air valve drop, completes the detection of experiment.

2, the utility model has adopted electronic signal experimental provision, and test accuracy is high, data reliability is high, improves the efficiency of experiment.

3, the utility model does not need complicated block testing stand, simple in structure, and experimentation cost is low, and applicability is wide, convenient uses for a long time, is widely used in each auto parts and components manufacturing plant, is conducive to industry development.

Accompanying drawing explanation

Fig. 1 is air valve drop radial deflection calibration experiment platform;

Fig. 2 is the valve experiment table of freely taking a seat;

Fig. 3 is data collector.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the engine valve radial deflection calibration experiment platform of taking a seat comprises: stand 1, cylinder cover 2, foil gauge 3, valve 4, clock gauge 5 and leading screw landing machine 7.

First stick foil gauge 3 connecting bridge boxes 8, strainmeter 9 and host computer 10 at the neck neck place of valve 4; Valve 4, valve spring are assembled to cylinder cover 2 to get on; Again cylinder cover 2 is fixed on stand 1, heads on valve 4 ends to its lift with screw-threaded shaft elevator 7; Finally clock gauge 5 is headed on to the side of valve 4.

As shown in Figure 2, the engine valve experiment table of freely taking a seat, first use iron staff 6 with screw-threaded shaft elevator 7 lift of valve 4 jack-up, then remove iron staff valve freely taken a seat, record the variation of voltage on host computer 10.

As shown in Figure 3, the variable of foil gauge 3 resistance, the first compensation through gap bridge box 8, then change into voltage quantities by strainmeter 9, be recorded on host computer 10.

What the utility model was surveyed is the engine valve radial deflection of taking a seat, and first calculates the relation of voltage and side-play amount by static demarcating, in the process of simulating air valve drop, goes out the radial deflection amount of dynamic valve by the change calculations of monitor strain sheet voltage.The utility model only needs simple experiment device, by the process of simulated engine air valve drop, completes the measurement of air valve drop radial deflection is calculated, and reaches testing requirements.

Its measuring process is:

Foil gauge connecting bridge box, strainmeter and host computer stick at the neck neck place of valve in step 1, elder generation; Valve, valve spring are assembled to cylinder cover to get on; Again cylinder cover is fixed on stand, heads on valve end to its lift with screw-threaded shaft elevator; Finally clock gauge is headed on to the side of valve and records its initial value.

Step 2, then to carry out static demarcating to valve, give one, valve power radially, record the registration of clock gauge and the magnitude of voltage of host computer demonstration; Then strengthen successively radial force, the magnitude of voltage of the registration that records successively clock gauge and corresponding host computer.Finally draw a voltage and the smooth curve that is offset increment by the method for numerical analysis.

Step 3, carry out dynamic experiment, by screw-threaded shaft elevator and lift of iron staff jack-up valve, remove suddenly iron staff, allow the process of air valve drop simulated engine air valve drop, record the magnitude of voltage on host computer.According to the curve of voltage and strain, calculate the radial deflection amount of valve.

Claims (1)

1. air valve drop radial deflection measurement mechanism, comprises valve, cylinder cover, clock gauge, foil gauge, screw-threaded shaft elevator, fixed rack, bridge box, strainmeter and host computer, it is characterized in that:

Valve is arranged on cylinder cover, and cylinder cover is fixed on fixed rack, is provided with screw-threaded shaft elevator in the forward side of valve end, posts foil gauge at the neck neck place of valve, and foil gauge is connected to strainmeter by bridge box, and strainmeter is connected with host computer signal; Clock gauge heads on the top sidewall of valve.