CN2856465Y

CN2856465Y - Automatic detection test bed for oil jetting pump

Info

Publication number: CN2856465Y
Application number: CN 200520115304
Authority: CN
Inventors: 贺启宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-22
Filing date: 2005-07-22
Publication date: 2007-01-10
Anticipated expiration: 2015-07-22

Abstract

The utility model relates to a test equipment, especially an injection pump automatic detection test bench which belongs to the field of diesel engine injection pump. The equipment is composed of a microcomputer, a PLC or SCM, a sensor, a electromagnetic valve, an injection pump, an oil mass detector, a oil circuit pipe casting, a frequency-changing dynamo, a servo motor, an oil measuring tank and a case. The output port of the injection pump is connected with the oil mass detector through a high pressure oil pipe; a high pressure electromagnetic valve is mounted between the oil mass detector and the high pressure oil pipe; the servo motor is mounted on the accelerator rod of the injection pump; a sound separating-absorbing cover is mounted on the position where the injection pump and the frequency-changing dynamo is arranged; a multi-layer metal mesh cover, an injection pressure sensor and a weight sensor are fixed on the oil mass detector. The utility model detects the weight of the fuel oil from each cylinder standard oil injector directly using the oil mass detector without influence of other oil circuit pipe and achieves high measuring accuracy.

Description

Injection Pump detects test stand automatically

Technical field

The utility model belongs to the testing installation of diesel injection pump, particularly a kind ofly can carry out the Injection Pump that computer numeralization measures automatically to each cylinder fuel injection quantity of diesel injection pump and each cylinder dynamic oil spout phase angle and other parameters and detects test stand automatically.

Technical background

Fuel injection pump tester is the equipment that diesel injection pump adjustment and verification are used.At present, fuel injection pump tester on the market has mostly adopted the computer measurement on the method for measurement of oil mass, he detects through physical quantitys such as the pressure of the fuel oil of oil sprayer ejection, weight, flow, liquid levels Injection Pump with relevant sensor, become electrical signal, is converted into fuel injection quantity again.But the measuring accuracy of most of fuel injection pump tester fuel injection quantitys, particularly duplicate measurements precision is all lower, trace it to its cause, the one, because the measuring position of sensor is not directly to aim at oil sprayer to measure, but middle have one or more such as temperature, the pressure surge because of fuel oil such as catchment cup, solenoid valve, foam breaker, pipe fitting, oil cylinder, gasification is leaked and is influenced the device of measuring accuracy; The 2nd, because the gauging assembly is connected with main frame by pivoted arm, the measuring accuracy of the influence of vibration sensor that motor and Injection Pump high speed rotating produce; The 3rd, the time error of oil-break mechanism, solenoid valve; The 4th, open loop detects the error that produces, and its oil spout number of times is by detecting the rotating speed of motor indirect calculation, actual fuel injection number of times possibility difference.In addition, fuel injection pump tester in the market also has the following disadvantages, and the one, the aperture of throttle does not have automatic controlling mechanism when detecting fuel injection quantity, can only manual tune, be not easy to measure the fuel injection quantity under various accelerator open degrees; The 2nd, the high speed rotating of motor and Injection Pump produces very big noise in the testing process of fuel injection quantity, and does not do noise reduction process.

Summary of the invention

For addressing the above problem, the utility model provide a kind of can highi degree of accuracy, measure each cylinder fuel injection quantity and the dynamic oil spout of each cylinder phase angle automatically to fast speed, accelerator open degree is controlled, have automatic warning function and reduce the noise device, can in computer, store and on screen, show survey data in many ways intuitively, and the Injection Pump that can print detects test stand automatically.

The technical solution adopted in the utility model is that Injection Pump detects test stand automatically, add PLC or single-chip microcomputer and sensor by micro computer, solenoid valve, Injection Pump, oil amount detector, the oil circuit pipe fitting, variable-frequency motor, actuating motor, masuring tank, cabinet is formed, it is characterized in that: the Injection Pump oil outlet links to each other with oil amount detector through high-pressure oil pipe, between oil amount detector and the high-pressure oil pipe high-pressure solenoid valve is installed, on the Injection Pump accelerator rod actuating motor is installed, masuring tank is placed directly on the ground by support, Injection Pump and variable-frequency motor position are equipped with every the sound absorption cover, and the active part that covers every absorbing sound of Injection Pump position uses oil cylinder to be connected with cabinet.The quantity of above-mentioned oil amount detector is identical with the ejection cylinder number of the Injection Pump that is detected.Oil amount detector is to be fixed with Composite Steel silk screen cover and injection pressure sensor on the oil nozzle of standard injector, standard injector is inserted in the lubricating cup, be fixed with level meter, following level meter on the lubricating cup, there is mist of oil to collect lid on the lubricating cup, the lubricating cup bottom is fixed with drain the oil mouth and oil discharging electromagnetic valve, the lubricating cup bottom is fixed on the weighing transducer, and weighing transducer is fixed on the lower support frame.Though standard injector is inserted in the lubricating cup, and oil nozzle submerges in the following fuel oil of minimum liquid level line, not with lubricating cup and on mist of oil collect lid and contact, but be fixed on the upper bracket of masuring tank.

The advantage that the utility model is compared with prior art had is to use oil amount detector directly the fuel oil of each cylinder standard injector ejection to be carried out weight detecting, there is not the influence of other oil circuit pipe fittings, the oil spout number of times that detects is accurate, add that masuring tank separates the influence that makes oil amount detector not be subjected to motor and oil pump high speed rotating with main frame, therefore the fuel injection quantity testing precision improves greatly, and can detect the dynamic oil spout of each cylinder phase angle automatically; And accelerator open degree controls automatically, therefore detects convenient, quick; Use every the sound absorption cover has reduced noise, has increased safety.

Description of drawings

Fig. 1 is oil circuit of the present utility model and working principle schematic representation;

Fig. 2 is an oil amount detector structural representation of the present utility model;

Fig. 3 is a housing construction schematic front view of the present utility model;

Fig. 4 is a housing construction signal left view of the present utility model.

Embodiment

Among Fig. 1, thermometer 41 is arranged in the oil cylinder 1, and (this table is installed on the mainframe box, so that observe the fuel tank temperature at any time), temperature transducer 42 is arranged, if oily temperature superelevation, refrigeration exchanger 45 (Fig. 3) is opened automatically, the oil temperature descends, if the oil temperature is ultralow, electric heater 44 (Fig. 3) power supply is connected automatically, and the oil temperature rises.Oil transfer pump 2 is transported to oil cylinder 28 with the fuel oil one tunnel in the oil cylinder 1 through solenoid valve 29 under the drive of Oil pump electrical machinery 3, automatically perform the on-off action every sound absorption cover 34 (Fig. 3); One the tunnel is transported to Injection Pump 15 through pressure regulator valve 4, inlet oil temperature sensor 5, input pressure sensor 6 are arranged on the Injection Pump 15, inlet oil temperature table 7 are arranged, input pressure table 8 (this two table is installed on the mainframe box), also have returning-oil temperature sensor 9, return pressure sensor 10, also have returning-oil temperature table 11, return pressure table 12 (this two table is installed on the mainframe box), by above temperature, pressure transducer, can on screen, show corresponding temperature and pressure value.Injection Pump 15 is by variable-frequency motor 14 driven rotary, rotating speed can be set arbitrarily, and detects its rotating speed by speed probe 39 (Fig. 3), as one of foundation that detects the oil spout number of times, accelerator open degree can detect the fuel injection quantity under the different accelerator open degrees by actuating motor 13 controls on the Injection Pump 15.The high pressure oil that Injection Pump 15 pumps is through high-pressure oil pipe 40, high-pressure solenoid valve 16 enters standard injector 17, the fuel oil of standard injector 17 ejections is at the impact-reducing of Composite Steel silk screen cover 22 and fuel oil, the pin bubble, accumulate in the lubricating cup 19 after the effect of pin mist, the mist of oil that minority is overflowed is collected by mist of oil and is covered 18 collections, its weight still is added on the lubricating cup 19, but test stand was reported to the police when the fuel oil in the lubricating cup 19 was promptly gone up liquid level line sensor 20 above greatest measurement, high-pressure solenoid valve 16 is opened and release, standard injector 17 stops oil spout, oil spout number of times that receives when oil spout sensor 24 and the oil spout number of times set by motor speed not simultaneously test stand report to the police and different number of times down, when the oil spout number of times of setting by motor speed is finished, high-pressure solenoid valve 16 is opened and release, standard injector 17 stops oil spout, high pressure oil directly flows back to oil trap 27 without standard injector 17, the fuel oil that flows into other standard injectors 17 pools together and flows back to oil cylinder 1 then, this moment, weight (pressure) sensor 23 was passed to micro computer with data, demonstrated oil spout total amount or the average single fuel injection quantity of setting the oil spout number of times; Unloading solenoid 26 then opens, fuel oil in the lubricating cup 19 flows to oil collecting pipe 27 through the mouth 25 of draining the oil, the fuel oil of emitting with other lubricating cups compiles and flows back to fuel tank 1 jointly, unloads solenoid 26 and close when fuel liquid level drops to down liquid level sensor 21, and is ready for measuring next time.

26 quantity of ending are identical with institute survey Injection Pump ejection cylinder number from high-pressure solenoid valve 16 to oil discharging electromagnetic valve for above-mentioned each part, and all the other each parts are one.

Among Fig. 2, be fixed with Composite Steel silk screen cover 22 and injection pressure sensor 24 on the nozzle of standard injector 17, be fixed with level meter 20, following level meter 21 on the lubricating cup, lubricating cup 19 bottoms are fixed with drain the oil mouth 25 and oil discharging electromagnetic valve 26, lubricating cup 19 bottoms are fixed on weight (pressure) sensor 23, and weight (pressure) sensor 23 is fixed on the lower support frame 32 of masuring tank 30.Though standard injector 17 is inserted in the lubricating cup 19, and oil nozzle submerges in the following fuel oil of minimum liquid level line, not with lubricating cup 19 and on mist of oil collect and cover 18 and contact, but be fixed on the upper bracket 31 of masuring tank 30,

Among Fig. 3 and Fig. 4, be supported on the support 33 to masuring tank 30 adjustable height, masuring tank 30 tops are fixed with the fix usefulness of standard injector 17 of upper bracket 31, the middle part is fixed with the fix usefulness of weight (pressure) sensor 23 of lower support frame 32, the bottom has return tube 43 to be connected to fuel tank 1, high-pressure oil pipe 40 fixing on the standard injector 17 is connected with the oil outlet of Injection Pump 15, Injection Pump 15 is installed about on the worktable 35, and with axle on flywheel 37 is housed variable-frequency motor 14 link to each other by shaft joint 36, speed probe 39 is housed on the variable-frequency motor 14, the accelerator rod position of Injection Pump 15 is equipped with actuating motor 13 on the worktable 35, accelerator open degree in order to automatic adjusting Injection Pump 15, also be equipped with every sound absorption cover 34 in worktable 35 positions on the platform of cabinet 38, be used to reduce the noise that Injection Pump 15 high speed rotating produce, be connected on the cabinet 38 and control it with oil cylinder 28 every the active part of sound absorption cover 34 and open or close, cabinet 38 also is equipped with fixing covering every sound absorption in the variable-frequency motor position, oil transfer pump 2 is connected with Injection Pump by transport pipe 44, and electric heater 45 and refrigeration exchanger 46 also are installed in the fuel tank 1.

Claims

1. an Injection Pump detects test stand automatically, add PLC or single-chip microcomputer and sensor by micro computer, solenoid valve, Injection Pump, oil amount detector, the oil circuit pipe fitting, variable-frequency motor, actuating motor, masuring tank, cabinet is formed, it is characterized in that: the Injection Pump oil outlet links to each other with oil amount detector through high-pressure oil pipe, between oil amount detector and the high-pressure oil pipe high-pressure solenoid valve is installed, on the Injection Pump accelerator rod actuating motor is installed, masuring tank is placed directly on the ground by support, Injection Pump and variable-frequency motor position are equipped with every the sound absorption cover, and the active part that covers every absorbing sound of Injection Pump position uses oil cylinder to be connected with cabinet.

2. Injection Pump according to claim 1 detects test stand automatically, it is characterized in that: the quantity of described oil amount detector is identical with the ejection cylinder number of the Injection Pump that is detected.

3. automatic detection test stand according to claim 1, it is characterized in that: described oil amount detector is to be fixed with Composite Steel silk screen cover and injection pressure sensor on the oil nozzle of standard injector, be fixed with level meter on the lubricating cup, following level meter, there is mist of oil to collect lid on the lubricating cup, the lubricating cup bottom is fixed with drain the oil mouth and oil discharging electromagnetic valve, the lubricating cup bottom is fixed on the weighing transducer, weighing transducer is fixed on the lower support frame, standard injector is inserted in the lubricating cup, oil nozzle submerges in the following fuel oil of minimum liquid level line, standard injector not with lubricating cup and on mist of oil collect lid and contact, but be fixed on the upper bracket of masuring tank.